Comparative effects of plant oils and trans-fat on blood lipid profiles and ischemic stroke in rats

Since plant oils are believed to be better than animal fats for cerebrovascular and cardiovascular diseases, the effects of various plant oils and trans-fat on blood lipid profiles and ischemic stroke were investigated. Sprague- Dawley rats were fed a diet containing the oils or trans-fat, and then body weights, blood lipids, and effects on brain infarction and physical dysfunction induced by middle cerebral artery occlusion （MCAO） were analyzed. All the oils and trans-fat, except perilla oil, significantly increased body fats and body weight gain. Sesame oil and trans-fat specifically increased blood cholesterols and triglycerides, respectively, while perilla oil decreased both cholesterols and triglycerides. Perilla oil not only attenuated cerebral infarction, but also restored locomotor activity and rota-rod performances of MCAO rats. It is suggested that perilla oil among oils and fats could be the first choice to reduce the risk of metabolic syndrome and ischemic stroke.

Refractory lipoatrophy treated with autologous whole blood injection:A case report

BACKGROUND Intramuscular corticosteroid injection may cause adverse effects such as dermal and/or subcutaneous atrophy,alopecia,hypopigmentation,and hyperpigmentation.Although cutaneous atrophy can spontaneously resolve,several treatment options have been suggested for this condition.CASE SUMMARY In this paper,we report a case of corticosteroid injection induced lipoatrophy treated with autologous whole blood(AWB)injection,as the condition had been unresponsive to fractional laser therapy.A 29-year-old female patient visited the dermatology clinic complaining of skin depression on her right buttock area,which had appeared six months earlier.There had been only subtle improvement at the margins after fractional CO_(2) laser treatment;therefore,after obtaining informed consent from the patient,AWB treatment was initiated.One month after the first AWB injection,the size and depth of the lesion had noticeably improved,and a slight improvement was also observed in discoloration.CONCLUSION Close observation is the initial treatment of choice for steroid induced skin atrophy;however,for patients in need of immediate cosmetic improvement,AWB injection may be a safe and cost-effective alternative.

The Effects of Folium Perillae Extract on Blood Fat and Lipid per Oxidation of Rabbit with Hyperlipemia

[Objective] The preventive and therapeutic effects of Folium perillae extract （FPE） on hyperlipemia induced by feeding rabbit with high fat forage were observed. [Method] The high fat and cholesterol diet were adopted to create the hyperlipemia model of rabbit. The rabbits were randomly and equally divided into 5 groups which were NC（ normal control）group, HLM （high lipid model） group, LFPE, MFPE and HFPE group （low, middle, high dosage of FPE were 0.17 g/kg, 0.5 g/kg and 1.5 g/kg respectively）. The contents of TC, TG, LDL-C, HDL-C, MDA and the activity of SOD in serum were detected respectively. [ Result] The three FPE groups could decrease the contents of TC, TG, LDL-C, MDA significantly （P〈0.01） compared with these of HLM group, and the contents of HDL-C （P〈0.01） and the activity of SOD （P〈0.05 ） in serum was increased significantly. [Conclusion] FPE could regulate blood-fat and counteract lipid peroxidation.

CATGUT EMBEDDING FOR TREATMENT OF SIMPLE OBESITY COMPLICATED WITH ABNORMAL BLOOD FAT

Objective To compare the therapeutic effect of catgut embedding combined with diet plus exercise with that of diet plus exercise in treating simple obesity complicated with abnormal blood fat. Methods A prescription of diet plus exercise was given to the patients in a control group, and catgut embedding was added to the prescription in a treatment group. It was given once every 15 days for the 1st three treatments, and once every month for the 2^nd three treatments. Six treatments constituted a therapeutic course. Body weight and blood fat were measured before and half a year since treatment. Results After treatment, BMI, TO, TG and LDL were very significantly improved in the treatment group （P〈0.01）, and BMI and TG were very significantly （P〈0.01） and TO and LDL were significantly （P〈0.05） improved in the control group. HDL was not obviously improved in both groups （P〉0.05）. The improvement of TO, TG and LDL in the treatment group was significantly more than that in the control group （P〈0.01）, but no difference in improvement of BMI and HDL was found between the two groups （P〉0.05）. Conclusion The therapy of diet plus exercise was effective in body weight reduction and lowering blood fat in patients with simple obesity complicated with abnormal blood fat, and catgut embedding used in combination was even better in lowering blood fat.

内源性n-3多不饱和脂肪酸对fat-1转基因小鼠血糖血脂的影响

利用fat-1转基因小鼠模型,研究内源性n-3多不饱和脂肪酸(n-3 PUFAs)的血糖血脂调节作用.采用fat-1转基因小鼠和C57BL/6野生型小鼠喂食高n-6、低n-3 PUFAs的标准配方饲料4周,然后2组小鼠给予高糖饮液自由饮用4周,每周测体重.第8周末,取血离心测血糖、胰岛素、甘油三脂(TG)、胆固醇(TC)、高密度脂蛋白(HDL-C)、低密度脂蛋白(LDL-C)水平.结果表明:fat-1转基因小鼠体重增加幅度、空腹血糖值、血清胰岛素、胰岛素抵抗指数、血清TC、TG、HDL-C、LDL-C水平明显低于野生型小鼠(P<0.05).认为n-3 PUFAs能抑制体重增长,降低小鼠血糖、血脂和胰岛素抵抗,起到调节血糖、血脂的作用.

FAT10在4-硝基喹啉-1-氧化物诱导舌癌模型中的表达特点

目的:建立与人舌黏膜鳞癌相近的大鼠舌癌模型,并研究其发生发展过程中双泛素FAT10的表达变化。方法:实验组SD雄性大鼠使用含有40μg/m L的4-硝基喹啉-1-氧化物(4-NQO)饮水喂养,分别在8、16、24周时取大鼠舌体中病灶部位组织,行组织学观察;对照组大鼠正常饮用水喂养24周。使用免疫组织化学法检测FAT10、p53在舌黏膜不同程度病变组织中的表达。结果:大鼠舌黏膜经过4-NQO不同时间的刺激,可发展成不同程度的上皮异常增生以及鳞状细胞癌。从正常黏膜到不同程度的不典型增生以及最后高分化的鳞癌中,FAT10的表达强度呈逐渐增高趋势;p53在正常黏膜为阳性表达,在不典型增生中表达升高,而在癌组织中表达降低。结论:在舌癌的发生、发展过程中,FAT10可能发挥了癌基因的作用。

Correlation between intakes of carbohydrates,protein,and fat with random blood sugar levels in menopausal women

Objective: Carbohydrates, proteins, and fats are energy sources needed by the body for performing daily activities and generating primary energy substances. In women who have undergone menopause, the function of thyroid hormone in their body begins to decline and thus affects the ability of the body to produce energy. The purpose of this study was to determine the correlation between the intakes of carbohydrates, proteins, and fats and random blood sugar levels in menopausal women.Methods: This study was a correlational analytical research with a cross-sectional design, which was conducted in 72 menopausal women recruited by the purposive sampling technique. In this study, a 24-hour food recall form was used, and randomized blood sugar levels were measured using a glucometer. The analysis of the data was performed using a Pearson product moment and multiple linear regression.Results: Carbohydrates and fats together affected random blood sugar levels with an F-value of 25.810 and a p-value of 0.000.Meanwhile, adjusted R^2 showed the value of 0.411, indicating that the difference in the intake of carbohydrates and fats together affected random blood sugar levels by 41.1%.Conclusions: Intake of carbohydrates and fats affected random blood sugar levels, whereas the rest were influenced by other factors,and protein intake was unrelated to random blood sugar levels in menopausal women.

类泛素蛋白FAT10对人肾上皮细胞α-烯醇酶共价修饰的初步研究

目的:构建带Flag标签的α-烯醇酶(ENO1)基因以及带Myc标签的人白细胞抗原F相关转录物10(FAT10)基因的真核表达质粒载体,鉴定ENO1和FAT10在人肾上皮细胞株HEK293中的表达,检测类泛素蛋白FAT10是否共价修饰ENO1。方法:以人宫颈癌细胞系He La的c DNA为模板进行PCR,得到eno1目的片段,与分别经EcoRⅤ和SalⅠ酶切的pFlag-CMV载体连接得到重组质粒pFlag-CMV-eno1并进行鉴定测序;以人脑组织c DNA文库为模板进行PCR,得到fat10目的片段,与分别经Eco RⅠ和XhoⅠ酶切的p CMV-Myc载体连接得到重组质粒p CMV-Myc-fat10并进行鉴定并测序。将重组质粒用脂质体法转染HEK293细胞,用Western印迹检测ENO1和FAT10蛋白的表达。将重组质粒共转染HEK293细胞,用免疫共沉淀检测FAT10对ENO1的修饰情况。结果:重组克隆载体内的eno1和fat10序列与Gen Bank报告的序列完全一致;转染HEK293细胞后,ENO1和FAT10蛋白过表达;FAT10能够共价修饰ENO1。结论:类泛素蛋白FAT10共价修饰ENO1,为肿瘤的发生、发展及迁移的研究提供了新的研究思路。

High fat diet dysregulates microRNA-17-5p and triggers retinal inflammation:Role of endoplasmic-reticulum-stress

AIM To elucidate how high diet-induced endoplasmic reticulum-stress upregulates thioredoxin interacting protein expression in Müller cells leading to retinal inflammation. METHODS Male C57Bl/J mice were fed either normal diet or 60% high fat diet for 4-8 wk. During the 4 wk study, mice received phenyl-butyric acid(PBA); endoplasmic reticulum-stress inhibitor; for 2 wk. Insulin resistance was assessed by oral glucose tolerance. Effects of palmitate-bovine serum albumin(BSA)(400 μmol/L) were examined in retinal Müller glial cell line and primary Müller cells isolated from wild type and thioredoxin interacting protein knock-out mice. Expression of thioredoxin interacting protein, endoplasmic reticulum-stress markers, mi R-17-5p m RNA, as well as nucleotide-binding oligomerization domain-like receptor protein(NLRP3) and IL1β protein was determined.RESULTS High fat diet for 8 wk induced obesity and insulin resistance evident by increases in body weight and impaired glucose tolerance. By performing quantitative real-time polymerase chain reaction, we found that high fat diet triggered the expression of retinal endoplasmic reticulum-stress markers(P < 0.05). These effects were associated with increased thioredoxin interacting protein and decreased mi R-17-5p expression, whichwere restored by inhibiting endoplasmic reticulumstress with PBA(P < 0.05). In vitro, palmitate-BSA triggered endoplasmic reticulum-stress markers, which was accompanied with reduced mi R-17-5p and induced thioredoxin interacting protein m RNA in retinal Müller glial cell line(P < 0.05). Palmitate upregulated NLRP3 and IL1β expression in primary Müller cells isolated from wild type. However, using primary Müller cells isolated from thioredoxin interacting protein knock-out mice abolished palmitate-mediated increase in NLRP3 and IL1β.CONCLUSION Our work suggests that targeting endoplasmic reticulumstress or thioredoxin interacting protein are potential therapeutic strategies for early intervention of obesityinduced retinal inflammation.

mi R-192-5p regulates lipid synthesis in non-alcoholic fatty liver disease through SCD-1

AIM To evaluate the levels of mi R-192-5 p in non-alcoholic fatty liver disease(NAFLD) models and demonstrate the role of mi R-192-5 p in lipid accumulation. METHODS Thirty Sprague Dawley rats were randomly divided into three groups, which were given a standard diet, a high-fat diet(HFD), and an HFD with injection of liraglutide. At the end of 16 weeks, hepatic mi R-192-5 p and stearoyl-Co A desaturase 1(SCD-1) levels were measured. Mi R-192-5 p mimic and inhibitor and SCD-1 si RNA were transfected into Huh7 cells exposed to palmitic acid(PA). Lipid accumulation was evaluated by oil red O staining and triglyceride assays. Direct interaction was validated by dual-luciferase reporter gene assays.RESULTS The HFD rats showed a 0.46-fold decrease and a 3.5-fold increase in hepatic mi R-192-5 p and SCD-1 protein levels compared with controls, respectively, which could be reversed after disease remission by liraglutide injection(P < 0.01). The Huh7 cells exposed to PA also showed down-regulation and up-regulation of mi R-192-5 p and SCD-1 protein levels, respectively(P < 0.01). Transfection with mi R-192-5 p mimic and inhibitor in Huh7 cells induced dramatic repression and promotion of SCD-1 protein levels, respectively(P < 0.01). Luciferase activity was suppressed and enhanced by mi R-192-5 p mimic and inhibitor, respectively, in wild-type SCD-1(P < 0.01) but not in mutant SCD-1. Mi R-192-5 p overexpression reduced lipid accumulation significantly in PA-treated Huh7 cells, and SCD-1 si RNA transfection abrogated the lipid deposition aggravated by mi R-192-5 p inhibitor(P < 0.01).CONCLUSION This study demonstrates that mi R-192-5 p has a negative regulatory role in lipid synthesis, which is mediated through its direct regulation of SCD-1.

Severe hyperlipemia-induced pseudoerythrocytosis - Implication for misdiagnosis and blood transfusion: A case report and literature review

BACKGROUND Severe hyperlipemia(SHLE)has an impact on the results of many kinds of laboratory tests.Complete blood count(CBC)examination by automated blood cell counter(ABCC)is a quick and convenient measurement for screening abnormalities of blood cells that are triggered by various pathogenic insults in disease diagnosis and for monitoring changes in the treatment of existing hematological conditions.However,CBC results are frequently affected by many intrinsic and extrinsic factors from blood samples,such as in the setting of hypergammaglobulinemia and certain anticoagulants.SHLE could also affect CBC results.CASE SUMMARY A 33-year-old Chinese male presented with painful foot numbness and abdominal pain.He was initially misdiagnosed as having a myeloproliferative neoplasm(MPN)because of the marked abnormalities in CBC examination by the ABCC.Morphological evaluation of the bone marrow smears and biopsy showed no evidence of MPN.Gene mutations in Breakpoint cluster regions-Abelson murine leukemia viral oncogene homologue 1(BCR-ABL1),Janus kinase 2(JAK2),calreticulin(CALR),myeloproliferative leukemia virus(MPL),and colony-stimulating factor 3 receptor(CSF3R)were negative.Having noticed the thick chylomicron layer on blood samples and the dramatically fluctuating CBC results,we speculated that the fat droplets formed by shaking the blood samples in the setting of SHLE were mistakenly identified as blood cells due to the limited parameters of ABCC.Therefore,we removed a large part of the chylomicron layer and then reexamined the CBC,and the CBC results,as we expected,differed significantly from that of the sample before the chylomicron layer was removed.These significant differences had been validated by the subsequently repeated laboratory tests by measuring dual blood samples that the chylomicron layer was removed in one sample and was not in another,and comparing the CBC results.Computerized tomography reexamination of the upper abdomen revealed an exudative lesion surrounding his pancreas.After intensive consultation,definitive diagnosis was made as recurrent pancreatitis,hyperlipemia and pseudoerythrocytosis.CONCLUSION SHLE may become a potential cause of misdiagnosis of hyperlipemia-related diseases as MPNs and the resultant mistreatment.It may also lead to the misinterpretation of transfusion indications in patients with hematological disorders who critically need blood transfusion for supportive treatment.

Numerical simulation of blood flow and interstitial fluid pressure in solid tumor microcirculation based on tumor-induced angiogenesis

A coupled intravascular-transvascular-interstitial fluid flow model is developed to study the distributions of blood flow and interstitial fluid pressure in solid tumor microcirculation based on a tumor-induced microvascular network. This is generated from a 2D nine-point discrete mathematical model of tumor angiogenesis and contains two parent vessels. Blood flow through the microvascular network and interstitial fluid flow in tumor tissues are performed by the extended Poiseuille＇s law and Darcy＇s law, respectively, transvascular flow is described by Starling＇s law; effects of the vascular permeability and the interstitial hydraulic conductivity are also considered. The simulation results predict the heterogeneous blood supply, interstitial hypertension and low convection on the inside of the tumor, which are consistent with physiological observed facts. These results may provide beneficial information for anti-angiogenesis treatment of tumor and further clinical research.

The Popularization and Application of Cold Storage Red Blood Cells or Whole Blood at -80 ℃ of the Rh(D) Negative Patients in Surgical Operation

Summary: The efficiency of cold storage red blood cells (CSRBC) or whole blood at -80 ℃ used in 27 Rh(D) negative patients during surgical operation was reported. The Rh(D) negative patients received the transfusion of CSRBC or whole blood stored at -80 ℃ for 180 to 360 days. The changes in the indexes, such as blood TB, DB, K +, Na +, BUN, Cr, urine protein (URPO), UOB, Hb, HCT, serum total protein, relative to hemolytic reaction and blood volume before and after transfusion were observed. The results showed that after transfusion of CSRBC or whole blood 27 cases were negative for urine protein and UOB, and the levels of BUN and Cr were normal (P>0.05). Blood TB, DB, Hb, and HCT were increased, while pH, blood K + and blood Na + was normal with the difference being not significant before and after operation (P>0.05). Plasma protein was decreased, but there was no significant difference before and after operation (P>0.05). It was suggested that CSRBC or whole blood at -80 ℃ could be safely infused to the Rh(D) negative patients without side effects during the surgical operation.

老年胃癌患者血清整合素β6和组织中Prox-1、FAT4表达变化及意义

目的探讨老年胃癌患者血清整合素β6和组织中同源异型盒基因转录因子(Prox)-1、脂肪非典型钙黏蛋白(FAT)4表达变化及对淋巴结转移的预测价值。方法选取老年胃癌患者80例为胃癌组,老年健康志愿者48例为对照组。采集空腹肘静脉血4 ml,双抗体夹心酶联免疫吸附试验检测血清整合素β6浓度;术中采集老年胃癌患者的胃癌组织标本和癌旁正常组织标本,免疫组化法检测Prox-1、FAT4表达。结果胃癌组血清整合素β6浓度明显高于对照组(P<0.01)。胃癌组织中Prox-1表达阳性率明显高于癌旁正常组织,FAT4表达阳性率明显低于癌旁正常组织(P<0.01)。肿瘤淋巴结转移分类(TNM)分期Ⅲ~Ⅳ期、肿瘤直径>4 cm、分化程度未分化或低分化、有淋巴结转移的老年胃癌患者血清整合素β6浓度明显高于TNM分期Ⅰ~Ⅱ期、肿瘤直径≤4 cm、分化程度中分化或高分化、无淋巴结转移的患者(P<0.05);TNM分期Ⅲ~Ⅳ期、肿瘤直径>4 cm、分化程度未分化或低分化、有淋巴结转移的老年胃癌患者Prox-1阳性率明显高于TNM分期Ⅰ~Ⅱ期、肿瘤直径≤4 cm、分化程度中分化或高分化、无淋巴结转移的患者,FAT4阳性率明显低于TNM分期Ⅰ~Ⅱ期、肿瘤直径≤4 cm、分化程度中分化或高分化、无淋巴结转移的患者(P<0.05)。受试者工作特征(ROC)曲线分析显示,血清整合素β6及组织中Prox-1、FAT4表达水平单独和联合检测对老年胃癌患者淋巴结转移均具有较高的预测价值(P<0.05),其中血清整合素β6及组织中Prox-1、FAT4表达水平联合检测的预测价值最高[曲线下面积(AUC)=0.941],特异度和阳性预测值明显高于各指标单独检测(P<0.05)。结论老年胃癌患者血清整合素β6浓度升高,组织中Prox-1高表达、FAT4低表达,且与病理指标相关,联合检测可用于对患者淋巴结转移的预测。

CORRELATIONS BETWEEN BLOOD PRESSURE AND BODY WEIGHT, SERUM LEPTIN IN HIGH CALORIE DIET-INDUCED OBESE RATS

Objective To examine the change of body weight (BW) and blood pressure (BP) in obese rats, clarify relationships between BP and BW and other factors. Methods Male Spraque-Dawley rats were fed either with normal diet (ND) or high calorie diet (HC) for 20 weeks. BW and BP of tail artery were observed biweekly and tetraweekly respectively; serum leptin and fasting insulin (FINS) were detected by enzyme-linked immunoadsordent assay (ELISA) and radioimmunoassay (RIA) respectively. Fasting plasma glucose (FPG) and free fatty acid(FFA) were measured by conventional means. Results BW, abdominal fat weight (AFW), ratio of abdominal fat weight to body weight (R_ F/W), systolic blood pressure (SBP), diastolic blood pressure (DBP), serum levels of leptin and FINS, FPG, FFA increased in the HD group after 20 weeks diet intervention (P<0.05 or P<0.01). SBP was strongly correlated with BW, leptin, FINS and FFA (P<0.05), DBP was correlated with FFA (r=0.47, P<0.05). In addition, leptin was positively correlated with BW, AFW, R_ F/W, FINS and FFA (P<0.05 or P<0.01). Conclusion In this study of high calorie-diet induced rats, the gain of BW is accompanied by increased BP. The obese rats have hyperleptinemia, hyperinsulinemia, hyperglycemia and dyslipidemia which may have important effects on the development of obesity-related hypertension. R_ F/W is the key factor in which affect serum leptin level.

Intravenous-Accelerated Saline Particles to Unblock Partially Clogged Blood Vessels Using a Microcontroller

This research assesses the speed of saline fluid in vein vessels using venipuncture medical kit as well as DC submersive pumps that are being controlled by a microcontroller. The microcontroller is monitored and governed using a software IDE interface installed on a powerful laptop. Saline solution is being pumped through a medical syringe at variable speeds up to a maximum of 18.39 cm/second to the vein. The novel technique in this research is the usage of two pumps called Pump 1 and Pump 2. Pump 1 is used to physically model the flow of “blood” in human vein and the second pump (Pump 2) is used to generate the accelerated saline particles that are used to break the yellow grease that is placed on the inside of the vein’s wall. A tiny brush is briefly dipped into yellow grease, and then it is used to place one layer (one turn) of yellow grease on the inside of the vein’s wall, and then this procedure is repeated to place consecutive layers of yellow grease onto the inside of the wall of the vein vessel using a tiny brush. It was found that accelerated saline particles can in fact destroy fats that are built up inside the veins’ walls.

Study of blood fat concentration based on serum ultraviolet absorption spectra and neural network

Blood plays an important role in the clinical di-agnosis and treatment, the analysis of blood will be of very important practical significance. The experiment shows that the absorption spectra of blood are of serious noise in the wave band of 200 to 300 nm, which hides the useful spectral characteristics. The effective separation of the noise was achieved by db4 wavelet transform, and the signals of reconstruction have been obviously improved in the noise serious wave band, reflecting some useful information. The absorption peaks of different samples are displaced to some degrees. The correlation between absorbance at 278nm and blood fat concentration is no significant and random. Based on the evident correlation between serum absorption spectrum and blood fat con-centration in the wave band of 265 to 282nm, a neural network model was built to forecast the blood fat concentration, bringing a relatively good prediction. This provides a new spectral test method of blood fat concentration.

Effects of Lycii Fructus and Salviae Miltiorrhizae on the Syndrome of Deficiency with Blood Stasis in RCS(rdy-/-, p-/-) Rats with Retinitis Pigmentosa: An Intervention Study

Objective To investigate the effects of Lycii Fructus(LF,Gou Qi Zi,枸杞子)and Salviae Miltiorrhizae Radix Ex Rhizoma(SM,Dan Shen,丹参)on the syndrome of deficiency with blood stasis in the RCS(rdy-/-,p-/-)rats with retinitis pigmentosa(RP).Methods A total of 32 RCS(rdy-/-,p-/-)rats were divided into 4 groups(equal amounts of female and male rats in each group):model group treated with 0.9%normal saline,LF group treated with LF formula granules,SM group treated with SM formula granules,and LF and SM(L·S)group treated with LF and SM formula granules.Eight RCS(rdy+/+,p+/+)rats(4 males and 4 females)were treated with 0.9%normal saline to serve as blank group.The contents of E2,PG,P-Selectin,plasma viscosity,whole blood relative index of the high shear rate and fibrinogen content in plasma,and the content of cAMP and cGMP in retinal homogenate were detected.The retina was evaluated by hematoxylin-eosin staining.Results The contents of E2,PG,P-Selectin,plasma viscosity,whole blood relative index of the high shear rate,and fibrinogen content in the plasma of L·S group significantly differed from those of model group(P<0.01),but were similar to those of blank group.The contents of cAMP and cGMP in the retinal homogenate of L·S group significantly differed from those in model group(P<0.01)but were similar to those in blank group(P>0.05).Conclusions LF and SM can effectively treat retinitis pigmentosa by ameliorating the syndrome of deficiency with blood stasis.

术后血糖联合胰腺-内脏脂肪CT值比对胰十二指肠切除术后胰瘘预测价值分析

目的研究胰十二指肠切除术(PD)后胰瘘(POPF)发生率与血糖及胰腺-内脏脂肪CT值比的相关性。方法选取2018年1月~2022年12月接受PD的病人94例,分析术前胰腺-内脏脂肪CT值比,检测术后1天血糖、血生化以及其他相关指标,单因素及多因素Logistic回归分析POPF发生的高危因素。结果94例病人中,POPF B/C级20例(21.3%)。Logistic回归分析结果显示,胰腺-内脏脂肪CT值比、术前淋巴细胞/单核细细胞、术后第1天血糖是PD病人术后POPF发生的危险因素;开腹手术是PD病人术后POPF发生的独立危险因素。胰腺-内脏脂肪CT值比预测POPF的灵敏度为0.80,特异度为0.58;术后第1天血糖预测POPF的灵敏度为0.55,特异度为0.84;二者联合预测POPF的灵敏度为0.60,特异度为0.78。结论胰腺-内脏脂肪CT值比联合术后第1天血糖可能成为预测PD病人POPF发生的危险因素。

IMPAIRED BLOOD-BRAIN BARRIER AFTER CHRONIC CEREBRAL HYPOPERFUSION

Ohjectire To examine the hypothesis of normal perjusion pressure breakthrough (NPPB). Methods A modified Spetzler carotid -jugular (CJ) fistula model was created to imitate NPPB. In 9 male adult Sprague- Dawley rats, the ipsilateral vertebral artery and bilateral external carotid arteries were occluded. The period of hypoperfusion CJ fistula was extended to 14 weeks, as a modofcation of Spetzler model. The histological change were examtned under transmission electron microscope 14 weeks after creation of the listula. Results Ischemic histological changes such as increased pinocytosis, increased lucency of the basal lamina, and frank necrosis of the cerebral capillary were found in rats of CJ fistula group. Conclusion The findings in this study suggest that blood - braln barrier (BBB) was impaired by chronic hypoperfusion. The impaired BBB mny be one of the important causes of the NPPB phenomenon.