Hepatic encephalopathy (HE) is a common neuropsychiatric abnormality, which complicates the course of patients with liver disease and results from hepatocellular failure and/or portosystemic shunting. The manifestat...Hepatic encephalopathy (HE) is a common neuropsychiatric abnormality, which complicates the course of patients with liver disease and results from hepatocellular failure and/or portosystemic shunting. The manifestations of HE are widely variable and involve a spectrum from mild subclinical disturbance to deep coma. Research interest has focused on the role of circulating gut-derived toxins, particularly ammonia, the development of brain swelling and changes in cerebral neurotransmitter systems that lead to global CNS depression and disordered function. Until recently the direct investigation of cerebral function has been difficult in man. However, new magnetic resonance imaging (MRI) techniques provide a non-invasive means of assessment of changes in brain volume (coregistered MRI) and impaired brain function (fMRI), while proton magnetic resonance spectroscopy (^1H MRS) detects changes in brain biochemistry, including direct measurement of cerebral osmolytes, such as myoinositol, glutamate and glutamine which govern processes intrinsic to cellular homeostasis, including the accumulation of intracellular water. The concentrations of these intracellular osmolytes alter with hyperammonaemia. MRS-detected metabolite abnormalities correlate with the severity of neuropsychiatric impairment and since MR spectra return towards normal after treatment, the technique may be of use in objective patient monitoring and in assessing the effectiveness of various treatment regimens.展开更多
AIM: To analyze the clinical characteristics of Chinese hereditary nonpolyposis colorectal cancer (HNPCC) families and to screen the germline mutations of human mismatch repair genes hMLH1 and hMSH2 in the probands...AIM: To analyze the clinical characteristics of Chinese hereditary nonpolyposis colorectal cancer (HNPCC) families and to screen the germline mutations of human mismatch repair genes hMLH1 and hMSH2 in the probands. METHODS: Thirty-one independent Chinese HNPCC families were collected in Zhejiang Province. All of them met Chinese HNPCC criteria. Clinical data about patient gender, site of colorectal cancer, age of onset, history of multiple colorectal cancer, associated extracolonic cancer were recorded. PCR and denaturing high performance liquid chromatography (DHPLC) were employed to screen the mutations. Sequencing analysis was used to find out the exact mutation site and characteristics of the samples showing abnormal DHPLC profiles. RESULTS: One hundred and thirty-six malignant neoplasms were found in 107 patients including 14 multiple cancers. One hundred and six of the 136 neoplasms (77.9%) were diagnosed as colorectal cancer, with an average age of onset at 48.57 ±29.00 years. Gastric cancer was the most common extracolonic cancer (10.3%) in these families. Twenty-three different sequence variations in hMLHI and hMSH2 genes were detected in these 17 families. Fifteen sequence variations were located in the exons, including 5 SNPs, 3 silent mutations, 3 missense mutations, 2 nonsense mutations and 2 frameshift mutations. The latter seven mutations seemed to be pathogenic. CONCLUSION: Germline mutations of hMLH1 and hMSH2 genes are identified in about one-third HNPCC kindreds fulfilling Chinese HNPCC criteria. Chinese HNPCC families have some particular clinical characteristics, such as a left-sided predominance, less synchronous or metachronous colorectal cancer, and frequent occurrence of gastric cancer.展开更多
AIM: To observe the effect of protocatechuic aldchyde on the proliferation of hepatic stellate cells (HSCs). METHODS: Liver fibrosis was induced in rats by carbon tetrachloride (CCh). Then normal and fibrotic dr...AIM: To observe the effect of protocatechuic aldchyde on the proliferation of hepatic stellate cells (HSCs). METHODS: Liver fibrosis was induced in rats by carbon tetrachloride (CCh). Then normal and fibrotic drug sera were extracted from rats. The effects of protocatechuic aldchyde, raw Radix Salvia miltiorrhiza and drug sera of Salvia miltiorrhiza on HSC growth were determined by CCKoS. The protocatechuic aldchyde was separated by high performance liquid chromatography (HPLC) in a AIItima C18 column (250 mm × 4.6 mm, 5 μm) with a mobile phase of acetonitrile-4% glacial acetic acid solution (gradient elution) at the wavelength of 281 nm. RESULTS: Protocatechuic aldchyde, raw Radix Salvia miltiorrhiza and drug sera of Salvia miltiorrhiza were found to have inhibitory effects on proliferation of rat HSCs. Raw Radix Salvia miltiorrhiza had a stronger inhibitory effect than the drug sera. The fibrotic drug sera showed a higher suppressive effect than the normal drug sera (P 〈 0.05). Protocatechuic aldchyde was found in crude materials of both Radix Salvia miltiorrhiza and its corresponding drug sera. The average recovery (n = 6) was 110.5% for raw Salvia miltiorrhiza Bge, 102% for normal drug sera and 105.2% for fibrotic drug sera. The relative standard devitation (RSD) was 0.37%, 1.96% and 1.51%, respectively (n=6). The contents of protocatechuic aldchyde were 0.22%, 0.15% and 0.19%, respectively (n = 6) (P〈 0.05). The RSD was 0.33%, 0.75% and 1.24% (n=6) for raw material of Radix Salvia miltiorrhiza, normal drug sera and fibrotic drug sera, respectively. The samples were stable for 6 d. CONCLUSION: Protocatechuic aldchyde can inhibit the growth of HSCs. HPLC is suitable for the determination of virtual bioactive components of Chinese herbal medicines in vitro.展开更多
AIM: To discuss the use of mycophenolate mofetil (MMF) as an immunosuppressant in steroid resistant rejection after liver transplantation. METHODS: The clinical records of 260 adult patients who underwent living d...AIM: To discuss the use of mycophenolate mofetil (MMF) as an immunosuppressant in steroid resistant rejection after liver transplantation. METHODS: The clinical records of 260 adult patients who underwent living donor liver transplantation (LDLT) were reviewed. Tacrolimus and methylprednisolone were used for primary immunosuppression. Acute rejection was first treated with steroids. When steroid resistance occurred, the patient was treated with a combination of steroids and MMF. Anti-T-cell monoclonal antibody was administered to patients who were not responsive to steroids in combination with MMF.RESULTS: A total of 90 (35%) patients developed acute rejection. The median interval time from transplantation to the first episode was 15 d. Fifty-four patients were steroid resistant. Forty-four patients were treated with MMF and the remaining 10 required anti-T-cell monoclonal antibody treatment. Progression to chronic rejection was observed in one patient. Bone marrow suppression and gastrointestinal symptoms were the most common side effects associated with MMF use. There was no significant increase in opportunistic infections. CONCLUSION: Our results demonstrate that MMF is a potent and safe immunosuppressive agent for rescue therapy in patients with acute rejection after LDLT.展开更多
To alert clinicians to a potential novel adverse drug effect of interferonβ la, we herein report a patient with relapsing-remitting multiple sclerosis who developed ulcerative colitis following treatment with interfe...To alert clinicians to a potential novel adverse drug effect of interferonβ la, we herein report a patient with relapsing-remitting multiple sclerosis who developed ulcerative colitis following treatment with interferonβ la. Ulcerative colitis persisted despite discontinuation of interferonβ la treatment and switching the patient to glatiramer acetate. Tacrolimus (FK506), 6-mercaptopurine, and prednisolone were required to induce remission. Both ulcerative colitis and multiple sclerosis were eventually well controlled using this regimen. Our report underscores that caution should be exercised when prescribing immunostimulatory agents in patients with inflammatory bowel disease (IBD) and challenges current efforts to stimulate innate immunity as a novel therapeutic concept for IBD.展开更多
AIM: To compare the features of biochemical metabolic changes detected by hepatic phosphorus-31 magnetic resonance spectroscopy (^31p MRS) with the liver damage score (LDS) and pathologic changes in rabbits and t...AIM: To compare the features of biochemical metabolic changes detected by hepatic phosphorus-31 magnetic resonance spectroscopy (^31p MRS) with the liver damage score (LDS) and pathologic changes in rabbits and to investigate the diagnostic value of ^31p MRS in acute hepatic radiation injury. METHODS: A total of 30 rabbits received different radiation doses (ranging 5-20 Gy) to establish acute hepatic injury models. Blood biochemical tests, ^31p MRS and pathological examinations were carried out 24 h after irradiation. The degree of injury was evaluated according to LD5 and pathology. Ten healthy rabbits served as controls. The MR examination was performed on a 1.5 T imager using a 1H/^31P surface coil by the 2D chemical shift imaging technique. The relative quantities of phosphomonoesters (PME), phosphodiesters (PDE), inorganic phosphate (Pi) and adenosine triphosphate (ATP) were measured. The data were statistically analyzed. RESULTS: (1) Relative quantification of phosphorus metabolites: (a) ATP: there were significant differences (P 〈 0.05) (LDS-groups:control group vs mild group vs moderate group vs severe group, 1.83±0.33 vs 1.55±0.24 vs 1.27±0.09 vs 0.98±0.18; pathological groups: control group vs mild group vs moderate group vs severe group, 1.83±0.33 vs 1.58±0.25 vs 1.32±0.07 vs 1.02±0.18) of ATP relative quantification among control group, mild injured group, moderate injured group, and severe injured group according to both LDS grading and pathological grading, respectively, and it decreased progressively with the increased degree of injury (r = -0.723, P = 0.000). (b) PME and Pi; the relative quantification of PME and Pi decreased significantly in the severe injured group, and the difference between the control group and severe injured group was significant (P 〈 0.05) (PME: 1DS- control group vs LDS-severe group, 0.86±0.23 vs 0.58±0.22, P = 0.031; pathological control group vs pathological severe group, 0.86±0.23 vs 0.60±0.21, P = 0.037; Pi: LDS-control group vs LDS-severe group, 0.74±0.18 vs 0.43±0.14, P = 0.013; pathological control group vs pathological severe group, 0.74±0.18 vs 0.43±0.14, P = 0.005) according to LDS grading and pathological grading, respectively. (c) PDE; there were no significant differences among groups according to LDS grading, and no significant differences between the control group and experimental groups according to pathological grading. (2) The ratio of relative quantification of phosphorus metabolites: significant differences (P 〈 0.05) (LDS- moderate group and LDS-severe group vs LDS-control group and LDS-mild group, 1.94±0.50 and 1.96±0.72 vs 1.43±0.31 and 1.40±0.38) were only found in PDE/ATP between the moderate injured group, the severe injured group and the control group, the mild injured group. No significant difference was found in other ratios of relative quantification of phosphorus metabolites.CONCLUSION: ^31p MRS is a useful method to evaluate early acute hepatic radiation injury. The relative quantification of hepatic ATP levels, which can reflect the pathological severity of acute hepatic radiation injury, is correlated with LDS.展开更多
OBJECTIVE To explore the methods and experience of thesingle-nostril transsphenoidal approach for treating pituitaryadenomas.METHODS We retrospectively analyzed 46 patients whohad pituitary tumors and received surgery...OBJECTIVE To explore the methods and experience of thesingle-nostril transsphenoidal approach for treating pituitaryadenomas.METHODS We retrospectively analyzed 46 patients whohad pituitary tumors and received surgery via the singlenostriltranssphenoidal approach and observed the effects andcomplications of surgery. The specific surgical methods are: a nasalspeculum is inserted slowly through the right nostril towards theanterior wall of the sphenoid sinus. A 1.5 cm incision is made intothe nasal mucosa in the right nasal cavity at the level of the middlenasal turbinate. By fracturing the bony septum, a space is formedbetween the bilateral nasal mucosa and the bony septum of thesphenoid sinus. Then, the inside of the sphenoid sinus is exposed.The remaining part of the bony septum, the anterior sphenoidsinus wall, and the sphenoid mucosa are gradually removed. Theanterior sphenoidotomy is less than 1.5 cm wide. After confirmingthe tumor by dural puncture, a cross incision of the dura is made,and the tumor is slowly removed by curette. The sella is usuallycollapsed and visible after the total tumor removal. When thetumor is resected satisfactorily, gelatin sponges are placed into theoperative cavity to stop bleeding.RESULTS Postoperative MRI scans revealed that among the 46cases, total resection of the tumor was achieved in 34 cases andsubtotal in 12. No deaths or disability occurred, and the hormonelevels of almost all patients improved. Signs of diabetes insipidusoccurred in 17, electrolyte disturbances in 5, and there were noreports of postoperative cerebrospinal fluid rhinorrhea.CONCLUSION The direct single nostril transsphenoidalapproach of continuous improvement has the advantages ofa convenient approach, simplified operation, safety and highefficiency.展开更多
Objective: To assess the value of MR spectroscopy (MRS) in the diagnosis of prostate cancer by meta-analysis. Methods: Prospective studies were selected from the MEDLINE, Ovid, Embase databases, Springer, Elsevier...Objective: To assess the value of MR spectroscopy (MRS) in the diagnosis of prostate cancer by meta-analysis. Methods: Prospective studies were selected from the MEDLINE, Ovid, Embase databases, Springer, Elsevier, China National Knowledge Infrastructure. According to the suggestion, results were determined by the ratio of (Cho+Cr)/Cit. If this ratio was less than 0.75, negative result was respectively determined, and the definitive tumor was diagnosed as this threshold. According to the assessment standard of Evidence-based Medicine, English and Chinese literature in Grade A and B on MRS imaging was included. According to homogeneity test, different effect models were chosen to calculate different pooled weighted values of sensitivity, specificity and the corresponding 95% confidence intervals (95% CI). Summary receiver operating characteristic (SROC) curves were used to assess the results. Funnel plot was used to analyze publication bias. Results: According to the assessment standard of Evidence-based Medicine, only 5 papers in Grade B were included in this research. The pooled weighted sensitivity and its 95% confidence interval is 82% (73%, 89%) and the pooled weighted sensitivity and its 95% confidence interval is 68% (58%, 76%). The AUC (area under curve) is 83.40%. An asymmetric funnel plot suggested two missing studies leading to publication bias. Conclusion: If the ratio of (Cho+Cr)/Cit is regarded as the diagnostic criteria in detecting prostate cancer by MRS, meta-analysis suggests this method has a better diagnostic value to detect the malignant prostate mass but the sensitivity needs to be improved. We hope to support a method and requirement about diagnostic test. Performing perspective register and improving quality of study design is the only way to reduce the bias and get real information of disease.展开更多
Urothelial cancers usually recur distantly rather than loco-regionally. In patients with pT2 and pT3/pT4 tumors, local recurrence has been observed in 3-4% and 11-16%, respectively, whereas distant failure has occurre...Urothelial cancers usually recur distantly rather than loco-regionally. In patients with pT2 and pT3/pT4 tumors, local recurrence has been observed in 3-4% and 11-16%, respectively, whereas distant failure has occurred in 10-27% and 19-35%, respectively. Despite local therapy most patients with muscle invasive transitional cell carcinoma (TCC) of the bladder die of systemic relapse, indicating a need for effective adjunctive systemic treatment. We determined whether neoadjuvant chemotherapy improved overall survival. This study evaluated the role of neoadjuvant combination chemotherapy with gemcitabine/cisplatin (GC) in improving the outcome of this group of patients. A total of 44 patients (84% Male, 16% Female) with newly diagnosed bladder cancer (T3-4, N0-2, M0) were subjected to initial 3 cycles of GC, then managed according to response. Patients were assessed clinically after each cycle and by Interim CT scan after 3 cycles of chemotherapy and those who achieved complete or partial response underwent radical cystectomy. We enrolled 63 patients, 19 of whom were found to be ineligible; thus, 44 were assigned to receive neoadjuvant chemotherapy followed by surgery. Average size of the largest tumor was greater that 30mm in 77% patients. According to Computed Tomographic findings 70% patients belonged to Stage T4A. The overall response rate to GC was 50%, and incomplete response was achieved in 25% whereas 25% patients were lost to follow up. Twenty two patients who had complete response, underwent cystectomy and diversion. It was observed that those patients who underwent radical cystectomy with ureterosigmoidostomy had an increased serum creatinine in comparison to patients who had ileal conduit. The size of the effect is modest and combination chemotherapy can be administered safely without adverse outcomes resulting in delayed local therapy. Further efforts to identify the patients most likely to benefit from neoadjuvant therapy are necessary to optimize its use.展开更多
This work traces the historical development and impact of political Islam on international relations (IR) from the last century to date. In this article the author asserts that understanding the rise of political Is...This work traces the historical development and impact of political Islam on international relations (IR) from the last century to date. In this article the author asserts that understanding the rise of political Islam at the world's stage and IR generally can be genealogically traced to two interrelated developments: the rise of the Muslim Brotherhood (MB) in Egypt since 1928 as a social and political movement against the growing Western influence in the Islamic World after the collapse of the ottoman empire; and the development of the post-World War II IR theories, and practices which provided the basis of the political, military, and security doctrines of the United States and its allies which proved its lack of reliability and validity, particularly as related to the Muslim World, and the role of religion within the Muslim states and place of religion in global politics.展开更多
Based on the starch hydrolysis reaction accelerated by microwave irradiation with α-amylase, the circular dichroism (CD) and secondary structure changes of α-amylase under the condition of microwave irradiation an...Based on the starch hydrolysis reaction accelerated by microwave irradiation with α-amylase, the circular dichroism (CD) and secondary structure changes of α-amylase under the condition of microwave irradiation and water bath were studied by circular dichroism spectra. The results showed that, both the peak heights (at 2=193 nm) of the CD spectra of the samples treated by microwave irradiation and water bath reduced. The reduced rate by microwave irradiation ranged from 140% to 220%, while the reduced rate by water bath ranged from 60% to 140%. The peak of the sample treated by microwave irradiation for 60 min disappeared at λ=193 nm, while the sample showed a wake peak by water bath. The peak position by microwave irradiation emerged a blue shift in the range of 5-8 nm at λ=204 nm and λ=220 nm, while it emerged in the range of 3-5 nm by water bath. With time going on, the microwave irradiation and water bath have prompted the secondary structure of α-helix, β-sheet, β-turn and the mutual transformations of random coil, but the trends were different.展开更多
The interaction of Fura-2 with Ca^2+ is studied using steady fluorescence technique. The effect of pH on the spectra behavior of Fura-2 in the presence of Ca^2+ is investigated, the excitation maxima (340 nm) and ...The interaction of Fura-2 with Ca^2+ is studied using steady fluorescence technique. The effect of pH on the spectra behavior of Fura-2 in the presence of Ca^2+ is investigated, the excitation maxima (340 nm) and the isobestic point (360 nm) for the fluorescence spectra of Fura-2 depend on pH. At different temperatures the apparent dissociation constants ( Kd ) of Fura-2-Ca^2+ complex are examined, Kd is found to decrease with increasing temperatures (20 ℃, 37 ℃, 50 ℃ ) and △His calculated to be 21.16 kJ/mol by using the Van' t Hoff equation at pH 7.4 for all the temperatures tested. The determination of intracellular Ca^2+ concentration ( [Ca^2+ ] i ) in lymphocyte is developed by using Fura-2 as a fluorescence probe in the presence of Cefotaxime at 37 ℃ and pH 7.4.展开更多
Even though Tulbaghia violacea has been used to treat and manage epilepsy in South Africa by traditional medicine practitioners, no evidence in any literature has shown any scientific scrutiny of the effectiveness of ...Even though Tulbaghia violacea has been used to treat and manage epilepsy in South Africa by traditional medicine practitioners, no evidence in any literature has shown any scientific scrutiny of the effectiveness of the plant species in therapy. This study was intended, therefore, to investigate the anticonvulsant effect of the leaf methanol extract of Tulbaghia violacea by studying its effect against tonic convulsion induced by either PTZ (pentylenetetrazole), bicuculline, picrotoxin, strychnine or NMDLA (N-methyl-DL-aspartic acid) in mice. Qualitative phytochemical analysis, acute toxicity and HPLC studies were also carried out on the plant species. Leaf methanol extract of Tulbaghia violacea, phenobarbitone, diazepam or muscimol significantly antagonised PTZ, bicuculline or picrotoxin-induced convulsion. Combined treatment of sub-effective doses of T. violacea and muscimol significantly antagonised tonic convulsion induced by PTZ. T. violacea or phenobarbitone significantly antagonised strychnine-induced tonic convulsion. T. violacea or LY233053 significantly antagonised NMDLA-elicited tonic convulsion. Phenytoin or DMSO (dimethylsulfoxide) did not significantly affect the tonic convulsion produced by PTZ, bicuculline, picrotoxin, strychnine or NMDLA. The phytochemical qualitative analysis of the plant species showed the presence of alkaloids, saponins, reducing sugars, flavonoids, cardiac glycosides, triterpene steroids, quinones and tannins. The LD50 value obtained following oral administration of the plant extract was over 4000 mg/kg. The data in the present study indicate that the leaf methanol extract of T. violacea has anticonvulsant activity which is probably underpinned by GABAergic, glutaminergic and glycinergic mechanisms.展开更多
Emblica officinalis (E. oJficinalis) dried fruits were evaluated for its antitrypanosomal activity and cytotoxic effects. Vero cell line maintained in DMEM (Dubecco's Modified Eagle Medium) and incubated with Try...Emblica officinalis (E. oJficinalis) dried fruits were evaluated for its antitrypanosomal activity and cytotoxic effects. Vero cell line maintained in DMEM (Dubecco's Modified Eagle Medium) and incubated with Trypanosoma evansi for more than 12 h. MPE was added to the Vero cell culture medium at different concentrations (250-1,000 μg/mL) with trypanosomes concentration (1 × 106 trypanosomes/mL in each ELISA plate well) and incubated at appropriate conditions for 72 h. In-vitro cytotoxieity of MPE of E. officinalis was determined on Vero cells at concentrations ((1.56-100 ~tg/mL). Acute toxicity and in-vivo infectivity tests were done in mice. Obtained MPE ofE. officinalis underwent process of purification via column chromatography, preparative chromatography and HPLC (higher performance liquid chromatography) with bioassay at different strata on Alsever's medium. In-vivo assay for trypanocidal activity, MPE and PPFs (partially purified fractions) of E. officinalis with two sets of mice, each mouse was inoculated with 1 × 104/mL oftrypanosomes and treated (48 h post inoculation) at concentrations (12.5, 25, 50, 100 and 200 mg/kg body weight) were administered at dose rate of 100 [tL per mouse via intraperitoneal route (in treating parassitemic mice) to different groups of mice, 6 mice per concentration. HPLC of partially purified fractions ofE. officinalis was carried out with mobile phase ofacetonitdle: water (40:60) in gradient mode. In vitro, MPE induced immobilization and killing of the parasites in concentration-time dependent manner. Significant reduction of trypanosomes counts from concentration of 250μg/mL and complete killing of trypanosomes at 5th hour of observation, which was statistically equivalent to 4th hour of Diminazine Aceturate (Berenil), standard reference drug used. HPLC of the partially purified fractions revealed two major prominent peaks at retention time of 1-4 min. In vivo, both MPE and PPFs of test material did prolong lives of mice by 6-9 days but could not cure them. At concentration of 2,000 kg/kg body weight of MPE in acute test, all mice survived. For in-vivo infectivity test, mice injected with immobilized trypanosomes developed parasitemia and died while, the other group survived. MPE, PPFs and Diminazine Aceturate were toxic to Vero cells at all concentrations exception of 1.56, 1.56-3.13 and 1.56-6.25 μg/mL, respectively. From this report, PPFs ofE. officinalis dried fruits demonstrated potential pathway for a new development oftrypanocide in near future if additional investigations are put in place.展开更多
This study included treatment of diabetic patients--type II with a polyherbs containing Nigella sativa, Trigonell foenum-graceum, Cyperus rotundus, Teucrium polium divided into two groups, first group was taken herbs ...This study included treatment of diabetic patients--type II with a polyherbs containing Nigella sativa, Trigonell foenum-graceum, Cyperus rotundus, Teucrium polium divided into two groups, first group was taken herbs with chemical treatment (drugs) and the other group which used herbs only. These groups were compared with healthy persons as a control group. Separation of the lipid component containing in the serum of two groups under study for diabetes mellitus patient--type lI before and after treatment with polyherbs by patients were performed. The separation of the components of different kinds of lipid parts like cholesterol ester (CE), triglyceride and phospholipids, in the blood using thin layer chromatography (TLC) and capillary gas chromatography (CGC). The results of this study for ester cholesterol part of serum patients show that there was a significant increase in the percentage of saturated fatty acid (SFA) and monounsaturated fatty acid (MUFA) before the treatment of the two groups compared to the control group and a significant decrease was observed in the percentage of these fatty acid after the treatment by polyherbal mixture than the percentage before treatment. Also, the results for the same part of ester cholesterol serum were showed a significant decrease in percentage of polyunsaturated fatty acid (PUFA) in the two groups of diabetes mellitus patients in comparison with the control group and there were a significant increase observed in PUFA percentage after the treatment. For triglyceride part in serum lipid, the results of this study were shown that there was a significant increase in percentage of SFA and PUFA before treatment in comparison with control group and after treatment for three months of the two groups of patients, shows a significant decrease in SFA but an increase in the percentage of PUFA was observed than that observed before treatment, also, there was a significant decrease in MUFA before treatment comparison with control group, while there was a significant increase which was observed after treatment in a percentage for the two groups of triglyceride part in serum lipid. The results indicated that there was a significant decrease in percentage of SFA before and after also in MUFA after the treatment in both groups compared with control and a significantly increase in PUFA percentage was also shown for phospholipids part in the serum.展开更多
基金Supported by grants from BUPA, the Royal College of Physicians of London and Paddington Charitable Trust, St Mary's,London. The European Association for the Study of the Liver, the British Medical Research Council (G9900178)Philips Medical Systems (Cleveland, Ohio, USA) and the United Kingdom Department of Health provided support for some of the studies outlined
文摘Hepatic encephalopathy (HE) is a common neuropsychiatric abnormality, which complicates the course of patients with liver disease and results from hepatocellular failure and/or portosystemic shunting. The manifestations of HE are widely variable and involve a spectrum from mild subclinical disturbance to deep coma. Research interest has focused on the role of circulating gut-derived toxins, particularly ammonia, the development of brain swelling and changes in cerebral neurotransmitter systems that lead to global CNS depression and disordered function. Until recently the direct investigation of cerebral function has been difficult in man. However, new magnetic resonance imaging (MRI) techniques provide a non-invasive means of assessment of changes in brain volume (coregistered MRI) and impaired brain function (fMRI), while proton magnetic resonance spectroscopy (^1H MRS) detects changes in brain biochemistry, including direct measurement of cerebral osmolytes, such as myoinositol, glutamate and glutamine which govern processes intrinsic to cellular homeostasis, including the accumulation of intracellular water. The concentrations of these intracellular osmolytes alter with hyperammonaemia. MRS-detected metabolite abnormalities correlate with the severity of neuropsychiatric impairment and since MR spectra return towards normal after treatment, the technique may be of use in objective patient monitoring and in assessing the effectiveness of various treatment regimens.
基金Supported by the Subdivisional Project of the "863" High Technology Research and Program of China, No. 2001AA227111
文摘AIM: To analyze the clinical characteristics of Chinese hereditary nonpolyposis colorectal cancer (HNPCC) families and to screen the germline mutations of human mismatch repair genes hMLH1 and hMSH2 in the probands. METHODS: Thirty-one independent Chinese HNPCC families were collected in Zhejiang Province. All of them met Chinese HNPCC criteria. Clinical data about patient gender, site of colorectal cancer, age of onset, history of multiple colorectal cancer, associated extracolonic cancer were recorded. PCR and denaturing high performance liquid chromatography (DHPLC) were employed to screen the mutations. Sequencing analysis was used to find out the exact mutation site and characteristics of the samples showing abnormal DHPLC profiles. RESULTS: One hundred and thirty-six malignant neoplasms were found in 107 patients including 14 multiple cancers. One hundred and six of the 136 neoplasms (77.9%) were diagnosed as colorectal cancer, with an average age of onset at 48.57 ±29.00 years. Gastric cancer was the most common extracolonic cancer (10.3%) in these families. Twenty-three different sequence variations in hMLHI and hMSH2 genes were detected in these 17 families. Fifteen sequence variations were located in the exons, including 5 SNPs, 3 silent mutations, 3 missense mutations, 2 nonsense mutations and 2 frameshift mutations. The latter seven mutations seemed to be pathogenic. CONCLUSION: Germline mutations of hMLH1 and hMSH2 genes are identified in about one-third HNPCC kindreds fulfilling Chinese HNPCC criteria. Chinese HNPCC families have some particular clinical characteristics, such as a left-sided predominance, less synchronous or metachronous colorectal cancer, and frequent occurrence of gastric cancer.
文摘AIM: To observe the effect of protocatechuic aldchyde on the proliferation of hepatic stellate cells (HSCs). METHODS: Liver fibrosis was induced in rats by carbon tetrachloride (CCh). Then normal and fibrotic drug sera were extracted from rats. The effects of protocatechuic aldchyde, raw Radix Salvia miltiorrhiza and drug sera of Salvia miltiorrhiza on HSC growth were determined by CCKoS. The protocatechuic aldchyde was separated by high performance liquid chromatography (HPLC) in a AIItima C18 column (250 mm × 4.6 mm, 5 μm) with a mobile phase of acetonitrile-4% glacial acetic acid solution (gradient elution) at the wavelength of 281 nm. RESULTS: Protocatechuic aldchyde, raw Radix Salvia miltiorrhiza and drug sera of Salvia miltiorrhiza were found to have inhibitory effects on proliferation of rat HSCs. Raw Radix Salvia miltiorrhiza had a stronger inhibitory effect than the drug sera. The fibrotic drug sera showed a higher suppressive effect than the normal drug sera (P 〈 0.05). Protocatechuic aldchyde was found in crude materials of both Radix Salvia miltiorrhiza and its corresponding drug sera. The average recovery (n = 6) was 110.5% for raw Salvia miltiorrhiza Bge, 102% for normal drug sera and 105.2% for fibrotic drug sera. The relative standard devitation (RSD) was 0.37%, 1.96% and 1.51%, respectively (n=6). The contents of protocatechuic aldchyde were 0.22%, 0.15% and 0.19%, respectively (n = 6) (P〈 0.05). The RSD was 0.33%, 0.75% and 1.24% (n=6) for raw material of Radix Salvia miltiorrhiza, normal drug sera and fibrotic drug sera, respectively. The samples were stable for 6 d. CONCLUSION: Protocatechuic aldchyde can inhibit the growth of HSCs. HPLC is suitable for the determination of virtual bioactive components of Chinese herbal medicines in vitro.
基金Supported by grant-in-aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan and grants-in-aid for Research on HIV/AIDS and Measures for Intractable Diseases from the Ministry of Health, Labor and Welfare of Japan
文摘AIM: To discuss the use of mycophenolate mofetil (MMF) as an immunosuppressant in steroid resistant rejection after liver transplantation. METHODS: The clinical records of 260 adult patients who underwent living donor liver transplantation (LDLT) were reviewed. Tacrolimus and methylprednisolone were used for primary immunosuppression. Acute rejection was first treated with steroids. When steroid resistance occurred, the patient was treated with a combination of steroids and MMF. Anti-T-cell monoclonal antibody was administered to patients who were not responsive to steroids in combination with MMF.RESULTS: A total of 90 (35%) patients developed acute rejection. The median interval time from transplantation to the first episode was 15 d. Fifty-four patients were steroid resistant. Forty-four patients were treated with MMF and the remaining 10 required anti-T-cell monoclonal antibody treatment. Progression to chronic rejection was observed in one patient. Bone marrow suppression and gastrointestinal symptoms were the most common side effects associated with MMF use. There was no significant increase in opportunistic infections. CONCLUSION: Our results demonstrate that MMF is a potent and safe immunosuppressive agent for rescue therapy in patients with acute rejection after LDLT.
文摘To alert clinicians to a potential novel adverse drug effect of interferonβ la, we herein report a patient with relapsing-remitting multiple sclerosis who developed ulcerative colitis following treatment with interferonβ la. Ulcerative colitis persisted despite discontinuation of interferonβ la treatment and switching the patient to glatiramer acetate. Tacrolimus (FK506), 6-mercaptopurine, and prednisolone were required to induce remission. Both ulcerative colitis and multiple sclerosis were eventually well controlled using this regimen. Our report underscores that caution should be exercised when prescribing immunostimulatory agents in patients with inflammatory bowel disease (IBD) and challenges current efforts to stimulate innate immunity as a novel therapeutic concept for IBD.
基金Supported by The National Natural Science Foundation of China, No. 30770626the Great Transversal Science Foundation of Zhejiang Province, China, No. 491020I20857
文摘AIM: To compare the features of biochemical metabolic changes detected by hepatic phosphorus-31 magnetic resonance spectroscopy (^31p MRS) with the liver damage score (LDS) and pathologic changes in rabbits and to investigate the diagnostic value of ^31p MRS in acute hepatic radiation injury. METHODS: A total of 30 rabbits received different radiation doses (ranging 5-20 Gy) to establish acute hepatic injury models. Blood biochemical tests, ^31p MRS and pathological examinations were carried out 24 h after irradiation. The degree of injury was evaluated according to LD5 and pathology. Ten healthy rabbits served as controls. The MR examination was performed on a 1.5 T imager using a 1H/^31P surface coil by the 2D chemical shift imaging technique. The relative quantities of phosphomonoesters (PME), phosphodiesters (PDE), inorganic phosphate (Pi) and adenosine triphosphate (ATP) were measured. The data were statistically analyzed. RESULTS: (1) Relative quantification of phosphorus metabolites: (a) ATP: there were significant differences (P 〈 0.05) (LDS-groups:control group vs mild group vs moderate group vs severe group, 1.83±0.33 vs 1.55±0.24 vs 1.27±0.09 vs 0.98±0.18; pathological groups: control group vs mild group vs moderate group vs severe group, 1.83±0.33 vs 1.58±0.25 vs 1.32±0.07 vs 1.02±0.18) of ATP relative quantification among control group, mild injured group, moderate injured group, and severe injured group according to both LDS grading and pathological grading, respectively, and it decreased progressively with the increased degree of injury (r = -0.723, P = 0.000). (b) PME and Pi; the relative quantification of PME and Pi decreased significantly in the severe injured group, and the difference between the control group and severe injured group was significant (P 〈 0.05) (PME: 1DS- control group vs LDS-severe group, 0.86±0.23 vs 0.58±0.22, P = 0.031; pathological control group vs pathological severe group, 0.86±0.23 vs 0.60±0.21, P = 0.037; Pi: LDS-control group vs LDS-severe group, 0.74±0.18 vs 0.43±0.14, P = 0.013; pathological control group vs pathological severe group, 0.74±0.18 vs 0.43±0.14, P = 0.005) according to LDS grading and pathological grading, respectively. (c) PDE; there were no significant differences among groups according to LDS grading, and no significant differences between the control group and experimental groups according to pathological grading. (2) The ratio of relative quantification of phosphorus metabolites: significant differences (P 〈 0.05) (LDS- moderate group and LDS-severe group vs LDS-control group and LDS-mild group, 1.94±0.50 and 1.96±0.72 vs 1.43±0.31 and 1.40±0.38) were only found in PDE/ATP between the moderate injured group, the severe injured group and the control group, the mild injured group. No significant difference was found in other ratios of relative quantification of phosphorus metabolites.CONCLUSION: ^31p MRS is a useful method to evaluate early acute hepatic radiation injury. The relative quantification of hepatic ATP levels, which can reflect the pathological severity of acute hepatic radiation injury, is correlated with LDS.
文摘OBJECTIVE To explore the methods and experience of thesingle-nostril transsphenoidal approach for treating pituitaryadenomas.METHODS We retrospectively analyzed 46 patients whohad pituitary tumors and received surgery via the singlenostriltranssphenoidal approach and observed the effects andcomplications of surgery. The specific surgical methods are: a nasalspeculum is inserted slowly through the right nostril towards theanterior wall of the sphenoid sinus. A 1.5 cm incision is made intothe nasal mucosa in the right nasal cavity at the level of the middlenasal turbinate. By fracturing the bony septum, a space is formedbetween the bilateral nasal mucosa and the bony septum of thesphenoid sinus. Then, the inside of the sphenoid sinus is exposed.The remaining part of the bony septum, the anterior sphenoidsinus wall, and the sphenoid mucosa are gradually removed. Theanterior sphenoidotomy is less than 1.5 cm wide. After confirmingthe tumor by dural puncture, a cross incision of the dura is made,and the tumor is slowly removed by curette. The sella is usuallycollapsed and visible after the total tumor removal. When thetumor is resected satisfactorily, gelatin sponges are placed into theoperative cavity to stop bleeding.RESULTS Postoperative MRI scans revealed that among the 46cases, total resection of the tumor was achieved in 34 cases andsubtotal in 12. No deaths or disability occurred, and the hormonelevels of almost all patients improved. Signs of diabetes insipidusoccurred in 17, electrolyte disturbances in 5, and there were noreports of postoperative cerebrospinal fluid rhinorrhea.CONCLUSION The direct single nostril transsphenoidalapproach of continuous improvement has the advantages ofa convenient approach, simplified operation, safety and highefficiency.
文摘Objective: To assess the value of MR spectroscopy (MRS) in the diagnosis of prostate cancer by meta-analysis. Methods: Prospective studies were selected from the MEDLINE, Ovid, Embase databases, Springer, Elsevier, China National Knowledge Infrastructure. According to the suggestion, results were determined by the ratio of (Cho+Cr)/Cit. If this ratio was less than 0.75, negative result was respectively determined, and the definitive tumor was diagnosed as this threshold. According to the assessment standard of Evidence-based Medicine, English and Chinese literature in Grade A and B on MRS imaging was included. According to homogeneity test, different effect models were chosen to calculate different pooled weighted values of sensitivity, specificity and the corresponding 95% confidence intervals (95% CI). Summary receiver operating characteristic (SROC) curves were used to assess the results. Funnel plot was used to analyze publication bias. Results: According to the assessment standard of Evidence-based Medicine, only 5 papers in Grade B were included in this research. The pooled weighted sensitivity and its 95% confidence interval is 82% (73%, 89%) and the pooled weighted sensitivity and its 95% confidence interval is 68% (58%, 76%). The AUC (area under curve) is 83.40%. An asymmetric funnel plot suggested two missing studies leading to publication bias. Conclusion: If the ratio of (Cho+Cr)/Cit is regarded as the diagnostic criteria in detecting prostate cancer by MRS, meta-analysis suggests this method has a better diagnostic value to detect the malignant prostate mass but the sensitivity needs to be improved. We hope to support a method and requirement about diagnostic test. Performing perspective register and improving quality of study design is the only way to reduce the bias and get real information of disease.
文摘Urothelial cancers usually recur distantly rather than loco-regionally. In patients with pT2 and pT3/pT4 tumors, local recurrence has been observed in 3-4% and 11-16%, respectively, whereas distant failure has occurred in 10-27% and 19-35%, respectively. Despite local therapy most patients with muscle invasive transitional cell carcinoma (TCC) of the bladder die of systemic relapse, indicating a need for effective adjunctive systemic treatment. We determined whether neoadjuvant chemotherapy improved overall survival. This study evaluated the role of neoadjuvant combination chemotherapy with gemcitabine/cisplatin (GC) in improving the outcome of this group of patients. A total of 44 patients (84% Male, 16% Female) with newly diagnosed bladder cancer (T3-4, N0-2, M0) were subjected to initial 3 cycles of GC, then managed according to response. Patients were assessed clinically after each cycle and by Interim CT scan after 3 cycles of chemotherapy and those who achieved complete or partial response underwent radical cystectomy. We enrolled 63 patients, 19 of whom were found to be ineligible; thus, 44 were assigned to receive neoadjuvant chemotherapy followed by surgery. Average size of the largest tumor was greater that 30mm in 77% patients. According to Computed Tomographic findings 70% patients belonged to Stage T4A. The overall response rate to GC was 50%, and incomplete response was achieved in 25% whereas 25% patients were lost to follow up. Twenty two patients who had complete response, underwent cystectomy and diversion. It was observed that those patients who underwent radical cystectomy with ureterosigmoidostomy had an increased serum creatinine in comparison to patients who had ileal conduit. The size of the effect is modest and combination chemotherapy can be administered safely without adverse outcomes resulting in delayed local therapy. Further efforts to identify the patients most likely to benefit from neoadjuvant therapy are necessary to optimize its use.
文摘This work traces the historical development and impact of political Islam on international relations (IR) from the last century to date. In this article the author asserts that understanding the rise of political Islam at the world's stage and IR generally can be genealogically traced to two interrelated developments: the rise of the Muslim Brotherhood (MB) in Egypt since 1928 as a social and political movement against the growing Western influence in the Islamic World after the collapse of the ottoman empire; and the development of the post-World War II IR theories, and practices which provided the basis of the political, military, and security doctrines of the United States and its allies which proved its lack of reliability and validity, particularly as related to the Muslim World, and the role of religion within the Muslim states and place of religion in global politics.
基金Project(08A080) supported by the Scientific Research Fund of Hunan Provincial Education Department,China
文摘Based on the starch hydrolysis reaction accelerated by microwave irradiation with α-amylase, the circular dichroism (CD) and secondary structure changes of α-amylase under the condition of microwave irradiation and water bath were studied by circular dichroism spectra. The results showed that, both the peak heights (at 2=193 nm) of the CD spectra of the samples treated by microwave irradiation and water bath reduced. The reduced rate by microwave irradiation ranged from 140% to 220%, while the reduced rate by water bath ranged from 60% to 140%. The peak of the sample treated by microwave irradiation for 60 min disappeared at λ=193 nm, while the sample showed a wake peak by water bath. The peak position by microwave irradiation emerged a blue shift in the range of 5-8 nm at λ=204 nm and λ=220 nm, while it emerged in the range of 3-5 nm by water bath. With time going on, the microwave irradiation and water bath have prompted the secondary structure of α-helix, β-sheet, β-turn and the mutual transformations of random coil, but the trends were different.
基金supported by the Key Project of National Nature Science Foundation of China(NO.90813018)the Returned Chinese Scholars Fund
文摘The interaction of Fura-2 with Ca^2+ is studied using steady fluorescence technique. The effect of pH on the spectra behavior of Fura-2 in the presence of Ca^2+ is investigated, the excitation maxima (340 nm) and the isobestic point (360 nm) for the fluorescence spectra of Fura-2 depend on pH. At different temperatures the apparent dissociation constants ( Kd ) of Fura-2-Ca^2+ complex are examined, Kd is found to decrease with increasing temperatures (20 ℃, 37 ℃, 50 ℃ ) and △His calculated to be 21.16 kJ/mol by using the Van' t Hoff equation at pH 7.4 for all the temperatures tested. The determination of intracellular Ca^2+ concentration ( [Ca^2+ ] i ) in lymphocyte is developed by using Fura-2 as a fluorescence probe in the presence of Cefotaxime at 37 ℃ and pH 7.4.
文摘Even though Tulbaghia violacea has been used to treat and manage epilepsy in South Africa by traditional medicine practitioners, no evidence in any literature has shown any scientific scrutiny of the effectiveness of the plant species in therapy. This study was intended, therefore, to investigate the anticonvulsant effect of the leaf methanol extract of Tulbaghia violacea by studying its effect against tonic convulsion induced by either PTZ (pentylenetetrazole), bicuculline, picrotoxin, strychnine or NMDLA (N-methyl-DL-aspartic acid) in mice. Qualitative phytochemical analysis, acute toxicity and HPLC studies were also carried out on the plant species. Leaf methanol extract of Tulbaghia violacea, phenobarbitone, diazepam or muscimol significantly antagonised PTZ, bicuculline or picrotoxin-induced convulsion. Combined treatment of sub-effective doses of T. violacea and muscimol significantly antagonised tonic convulsion induced by PTZ. T. violacea or phenobarbitone significantly antagonised strychnine-induced tonic convulsion. T. violacea or LY233053 significantly antagonised NMDLA-elicited tonic convulsion. Phenytoin or DMSO (dimethylsulfoxide) did not significantly affect the tonic convulsion produced by PTZ, bicuculline, picrotoxin, strychnine or NMDLA. The phytochemical qualitative analysis of the plant species showed the presence of alkaloids, saponins, reducing sugars, flavonoids, cardiac glycosides, triterpene steroids, quinones and tannins. The LD50 value obtained following oral administration of the plant extract was over 4000 mg/kg. The data in the present study indicate that the leaf methanol extract of T. violacea has anticonvulsant activity which is probably underpinned by GABAergic, glutaminergic and glycinergic mechanisms.
文摘Emblica officinalis (E. oJficinalis) dried fruits were evaluated for its antitrypanosomal activity and cytotoxic effects. Vero cell line maintained in DMEM (Dubecco's Modified Eagle Medium) and incubated with Trypanosoma evansi for more than 12 h. MPE was added to the Vero cell culture medium at different concentrations (250-1,000 μg/mL) with trypanosomes concentration (1 × 106 trypanosomes/mL in each ELISA plate well) and incubated at appropriate conditions for 72 h. In-vitro cytotoxieity of MPE of E. officinalis was determined on Vero cells at concentrations ((1.56-100 ~tg/mL). Acute toxicity and in-vivo infectivity tests were done in mice. Obtained MPE ofE. officinalis underwent process of purification via column chromatography, preparative chromatography and HPLC (higher performance liquid chromatography) with bioassay at different strata on Alsever's medium. In-vivo assay for trypanocidal activity, MPE and PPFs (partially purified fractions) of E. officinalis with two sets of mice, each mouse was inoculated with 1 × 104/mL oftrypanosomes and treated (48 h post inoculation) at concentrations (12.5, 25, 50, 100 and 200 mg/kg body weight) were administered at dose rate of 100 [tL per mouse via intraperitoneal route (in treating parassitemic mice) to different groups of mice, 6 mice per concentration. HPLC of partially purified fractions ofE. officinalis was carried out with mobile phase ofacetonitdle: water (40:60) in gradient mode. In vitro, MPE induced immobilization and killing of the parasites in concentration-time dependent manner. Significant reduction of trypanosomes counts from concentration of 250μg/mL and complete killing of trypanosomes at 5th hour of observation, which was statistically equivalent to 4th hour of Diminazine Aceturate (Berenil), standard reference drug used. HPLC of the partially purified fractions revealed two major prominent peaks at retention time of 1-4 min. In vivo, both MPE and PPFs of test material did prolong lives of mice by 6-9 days but could not cure them. At concentration of 2,000 kg/kg body weight of MPE in acute test, all mice survived. For in-vivo infectivity test, mice injected with immobilized trypanosomes developed parasitemia and died while, the other group survived. MPE, PPFs and Diminazine Aceturate were toxic to Vero cells at all concentrations exception of 1.56, 1.56-3.13 and 1.56-6.25 μg/mL, respectively. From this report, PPFs ofE. officinalis dried fruits demonstrated potential pathway for a new development oftrypanocide in near future if additional investigations are put in place.
文摘This study included treatment of diabetic patients--type II with a polyherbs containing Nigella sativa, Trigonell foenum-graceum, Cyperus rotundus, Teucrium polium divided into two groups, first group was taken herbs with chemical treatment (drugs) and the other group which used herbs only. These groups were compared with healthy persons as a control group. Separation of the lipid component containing in the serum of two groups under study for diabetes mellitus patient--type lI before and after treatment with polyherbs by patients were performed. The separation of the components of different kinds of lipid parts like cholesterol ester (CE), triglyceride and phospholipids, in the blood using thin layer chromatography (TLC) and capillary gas chromatography (CGC). The results of this study for ester cholesterol part of serum patients show that there was a significant increase in the percentage of saturated fatty acid (SFA) and monounsaturated fatty acid (MUFA) before the treatment of the two groups compared to the control group and a significant decrease was observed in the percentage of these fatty acid after the treatment by polyherbal mixture than the percentage before treatment. Also, the results for the same part of ester cholesterol serum were showed a significant decrease in percentage of polyunsaturated fatty acid (PUFA) in the two groups of diabetes mellitus patients in comparison with the control group and there were a significant increase observed in PUFA percentage after the treatment. For triglyceride part in serum lipid, the results of this study were shown that there was a significant increase in percentage of SFA and PUFA before treatment in comparison with control group and after treatment for three months of the two groups of patients, shows a significant decrease in SFA but an increase in the percentage of PUFA was observed than that observed before treatment, also, there was a significant decrease in MUFA before treatment comparison with control group, while there was a significant increase which was observed after treatment in a percentage for the two groups of triglyceride part in serum lipid. The results indicated that there was a significant decrease in percentage of SFA before and after also in MUFA after the treatment in both groups compared with control and a significantly increase in PUFA percentage was also shown for phospholipids part in the serum.