BACKGROUND Tuberculosis is a chronic infectious disease and an important public health pro-blem.Despite progress in controlling tuberculosis,the incidence of tuberculosis in China is still very high,with 895000 new ca...BACKGROUND Tuberculosis is a chronic infectious disease and an important public health pro-blem.Despite progress in controlling tuberculosis,the incidence of tuberculosis in China is still very high,with 895000 new cases annually.This case report des-cribes the investigation of a case of severe disseminated tuberculosis in a young adult with normal immune function,conducted to ascertain why a Mycobacterium tuberculosis(M.tuberculosis)strain caused such severe disease.CASE SUMMARY A previously healthy 28-year-old woman presented to our hospital with a 1-mo-nth history of fever and fatigue.She was diagnosed with severe disseminated pulmonary tuberculosis,spinal tuberculosis with paravertebral abscesses,and tuberculous meningitis.M.tuberculosis was isolated from bronchoal-veolar lavage fluid.She was treated with standard antituberculous therapy and underwent debridement,bone graft,and internal fixation surgery for spinal tuberculosis.She responded to therapy and regained her ability to walk following the surgery.We analysed the whole-genome sequence of the strain and designated it BLM-A21.Additional M.tuberculosis genomes were selected from the Virulence Factor Database(http://www.mgc.ac.cn/cgi-bin/VFs/genus.cgi?Genus=Mycobacterium)for comparison.An evolutionary tree of the BLM-A21 strain was built using PhyML maximum likelihood software.Further gene analysis revealed that,except for the pks1 gene,BLM-A21 had similar virulence genes to the CDC 1551 and H37Rv strains,which have lower dissemination.CONCLUSION We speculate that the pks1 virulence gene in BLM-A21 may be the key virulence gene responsible for the wide-spread dissemination of M.tuberculosis infection in this previously healthy adult with normal immune function.展开更多
Background: Open pancreaticoduodenectomy(OPD) with portal or superior mesenteric vein resection and reconstruction has been applied in pancreatic cancer patients with tumor infiltration or adherence. However, it is co...Background: Open pancreaticoduodenectomy(OPD) with portal or superior mesenteric vein resection and reconstruction has been applied in pancreatic cancer patients with tumor infiltration or adherence. However, it is controversial whether laparoscopic pancreaticoduodenectomy(LPD) with major vascular resection and reconstruction is feasible. This study aimed to evaluate the safety and feasibility of LPD with major vascular resection compared with OPD with major vascular resection. Methods: We reviewed data for all pancreatic cancer patients undergoing LPD or OPD with vascular resection at Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, between February 2018 and May 2022. We compared the preoperative, intraoperative, and postoperative clinicopathological data of the two groups to conduct a comprehensive evaluation of LPD with major vascular resection. Results: A total of 63 patients underwent pancreaticoduodenectomy(PD) with portal or superior mesenteric vein resection and reconstruction, including 25 LPDs and 38 OPDs. The LPD group had less intraoperative blood loss(200 vs. 400 m L, P < 0.001), lower proportion of intraoperative blood transfusion(16.0% vs. 39.5%, P = 0.047), longer operation time(390 vs. 334 min, P = 0.004) and shorter postoperative hospital stay(11 vs. 14 days, P = 0.005). There was no perioperative death in all patients. There was no significant difference in the incidence of total postoperative complications, grade B/C postoperative pancreatic fistula, delayed gastric emptying and abdominal infection between the two groups. No postpancreatectomy hemorrhage nor bile leakage occurred during perioperative period. There was no significant difference in R0 resection rate and number of lymph nodes harvested between the two groups. Patency of reconstructed vessels in the two groups were 96.0% and 92.1%, respectively( P = 0.927). Conclusions: LPD with portal or superior mesenteric vein resection and reconstruction was safe, feasible and oncologically acceptable for selected patients with pancreatic cancer, and it can achieve similar or even better perioperative results compared to open approach.展开更多
AIM To explore expression of angiopoietin-like protein 2(ANGpT L2) and its effect on biological behavior such as proliferation and invasiveness in gastric cancer. METHODS Western blotting was used to detect expression...AIM To explore expression of angiopoietin-like protein 2(ANGpT L2) and its effect on biological behavior such as proliferation and invasiveness in gastric cancer. METHODS Western blotting was used to detect expression of ANGp TL2 in 60 human normal gastric tissues, 60 human gastric cancer tissues and gastric cell lines including GES-1, N87, SGC7901, BGC823 and pA MC82. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) and Transwell assay were used to detect the proliferation and invasive ability of gastric cancer cells. RESULTS Compared to normal tissues, ANGp TL2 protein levels were significantly upregulated in gastric tissues, and this level was closely correlated with gastric tumor grade, clinical stage and lymph node metastasis. Compared to GES-1 cells, ANGpT L2 mR NA and protein levels were significantly increased in gastric cancer cells including N87, SGC7901, BGC823 and p AMC82. The expression of ANGpT L2 in highly malignant gastric cancer cell lines BGC823 and pA MC82 was significantly higher than in low malignancy gastric cancer cell lines N87 and SGC7901. MTT and Transwell experiments indicated that the proliferation rate and invasive ability of stable overexpressed gastric cancer cells was faster than in cells transfected with Lv-NC and blank controlcells, and the invasive ability of stable overexpressed gastric cancer cells was higher than that of cells transfected with Lv-NC and blank control cells.CONCLUSION ANGp TL2 contributed to proliferation and invasion of gastric cancer cells. In clinical treatment, ANGpT L2 may become a new target for treatment of gastric cancer.展开更多
AIM: To explore the regulatory mechanism of the target gene of micro RNA-21(mi R-21), phosphatase gene(p TEN), and its downstream proteins, protein kinase B(AKT) and phosphatidylinositol 3-kinase(p I3K), in colorectal...AIM: To explore the regulatory mechanism of the target gene of micro RNA-21(mi R-21), phosphatase gene(p TEN), and its downstream proteins, protein kinase B(AKT) and phosphatidylinositol 3-kinase(p I3K), in colorectal cancer(CRC) cells. METHODS: Quantitative real-time p CR(q RT-p CR) and Western blot were used to detect the expression levels of mi R-21 and p TEN in HCT116, HT29, Colo32 and SW480 CRC cell lines. Also, the expression levels of p TEN m RNA and its downstream proteins AKT and p I3 K in HCT116 cells after downregulating mi R-21 were investigated. RESULTS: Comparing the mi R-21 expression in CRC cells, the expression levels of mi R-21 were highest in HCT116 cells, and the expression levels of mi R-21 were lowest in SW480 cells. In comparing mi R-21 and p TEN expression in CRC cells, we found that the protein expression levels of mi R-21 and p TEN were inversely correlated(p < 0.05); when mi R-21 expression was reduced, m RNA expression levels of p TEN did not significantly change(p > 0.05), but the expression levels of its protein significantly increased(p < 0.05). In comparing the levels of p TEN protein and downstream AKT and p I3 K in HCT116 cells after downregulation of mi R-21 expression, the levels of AKT and p I3 K protein expression significantly decreased(p < 0.05). CONCLUSION: p TEN is one of the direct target genesof mi R-21. Thus, phosphatase gene and its downstream AKT and p I3 K expression levels can be regulated by regulating the expression levels of mi R-21, which in turn regulates the development of CRC.展开更多
Crohn’s disease(CD)is a complex and relapsing gastrointestinal disease with mesenteric alterations.The mesenteric neural,vascular,and endocrine systems actively take part in the gut dysbiosis-adaptive immunity-mesent...Crohn’s disease(CD)is a complex and relapsing gastrointestinal disease with mesenteric alterations.The mesenteric neural,vascular,and endocrine systems actively take part in the gut dysbiosis-adaptive immunity-mesentery-body axis,and this axis has been proven to be bidirectional.The abnormalities of morphology and function of the mesenteric component are associated with intestinal inflammation and disease progress of CD via responses to afferent signals,neuropeptides,lymphatic drainage,adipokines,and functional cytokines.The hypertrophy of mesenteric adipose tissue plays important roles in the pathogenesis of CD by secreting large amounts of adipokines and representing a rich source of proinflammatory or profibrotic cytokines.The vascular alteration,including angiogenesis and lymphangiogenesis,is concomitant in the disease course of CD.Of note,the enlarged and obstructed lymphatic vessels,which have been described in CD patients,are likely related to the early onset submucosa edema and being a cause of CD.The function of mesenteric lymphatics is influenced by endocrine of mesenteric nerves and adipocytes.Meanwhile,the structure of the mesenteric lymphatic vessels in hypertrophic mesenteric adipose tissue is mispatterned and ruptured,which can lead to lymph leakage.Leaky lymph factors can in turn stimulate adipose tissue to proliferate and effectively elicit an immune response.The identification of the role of mesentery and the crosstalk between mesenteric tissues in intestinal inflammation may shed light on understanding the underlying mechanism of CD and help explore new therapeutic targets.展开更多
Background: Talaromyces (Penicillium) marneffei (TIM) is an emerging dimorphic human pathogenic fungus that is endemic to Southeast Asia. TM mostly occurs as an opportunistic infection in patients with human immu...Background: Talaromyces (Penicillium) marneffei (TIM) is an emerging dimorphic human pathogenic fungus that is endemic to Southeast Asia. TM mostly occurs as an opportunistic infection in patients with human immunodeficiency virus (HIV). The objective of this study was to compare the clinical and laboratory parameters of patients with TM infections who were HIV-positive and HIV-negative and to assess therapies and outcomes. Methods: This was a retrospective analysis of 26 patients diagnosed with disseminated TM infection from September 2005 to April 2014 at Fujian Provincial Hospital, China. Results: Patients with TM infection tend to present with fever, weight loss, and anemia. The time from symptom onset to confirmed diagnosis was greater for HlV-negative patients (n 7; median: 60 days, range: 14-365 days) than for HIV-positive patients (n = 19; median: 30 days, range: 3-90 days, Mann-Whitney U= 31.50, P = 0.041). HIV-negative patients were more likely to have dyspnea (57.1% vs. 5.3%, Z: = 8.86, P = 0.010), low neutrophil count (Mann-Whitney U = 27.00, P = 0.029), high CD4 count (Mann-Whitney U= 0.00, P 0.009), and high lymphocyte count (Mann-Whitney U = 21.00, P = 0.009). There were no significant differences in other demographic, clinical, or biochemical characteristics. Among all the patients, 12 HIV-positive patient and 1 HlV-negative patient received amphotericin and fluconazole treatment, 9 of whom improved, l died, 2 had kidney damage, 1 had hypokalemia due to exceeded doses. Conclusions: HIV-negative patients with TM infections tend to have a longer diagnostic interval, a higher percentage of dyspnea, higher levels of CD4 and lymphocytes, and lower neutrophil counts than TM infection in HIV-positive patients. Treatment programs with amphotericin and fluconazole are mostly effective.展开更多
SARS-CoV-2 infection causes complicated clinical manifestations with variable multi-organ injuries,how-ever,the underlying mechanism,in particular immune responses in different organs,remains elusive.In this study,com...SARS-CoV-2 infection causes complicated clinical manifestations with variable multi-organ injuries,how-ever,the underlying mechanism,in particular immune responses in different organs,remains elusive.In this study,comprehensive transcriptomic alterations of 14 tissues from rhesus macaque infected with SARS-CoV-2 were analyzed.Compared to normal controls,SARS-CoV-2 infection resulted in dysregulation of genes involving diverse functions in various examined tissues/organs,with drastic transcriptomic changes in cerebral cortex and right ventricle.Intriguingly,cerebral cortex exhibited a hyperinflammatory state evidenced by sig-nificant upregulation of inflammation response-related genes.Meanwhile,expressions of coagulation,angio-genesis and fibrosis factors were also up-regulated in cerebral cortex.Based on our findings,neuropilin 1(NRP1),a receptor of SARS-CoV-2,was significantly elevated in cerebral cortex post infection,accompanied by active immune response releasing inflammatory factors and signal transmission among tissues,which enhanced infection of the central nervous system(CNS)in a positive feedback way,leading to viral encephalitis.Overall,our study depicts a multi-tissue/organ tran-scriptomic landscapes of rhesus macaque with early infection of SARS-CoV-2,and provides important insights into the mechanistic basis for COVID-19-asso-ciated clinical complications.展开更多
Emerging as an outperformed class of metal-organic frameworks(MOFs),square-octahedron(soc)topology MOFs(soc-MOFs)feature superior properties of high porosity,large gas storage capacity,and excellent thermal/chemical s...Emerging as an outperformed class of metal-organic frameworks(MOFs),square-octahedron(soc)topology MOFs(soc-MOFs)feature superior properties of high porosity,large gas storage capacity,and excellent thermal/chemical stability.We report here an iron based soc-MOF,denoted as Fe-pbpta(H4pbpta=4,4',4'',4'''-(1,4-phenylenbis(pyridine-4,2-6-triyl))-tetrabenzoic acid)possessing a very high Brunauer,Emmett and Teller(BET)surface area of 4,937 m2/g and a large pore volume of 2.15 cm3/g.The MOF demonstrates by far the highest gravimetric uptake of 369 cm3(STP)/g under the DOE operational storage conditions(35 bar and 298 K)and a high volumetric deliverable capacity of 192 cc/cc at 298 K and 65 bar.Furthermore,Fe-pbpta exhibits high thermal and aqueous stability making it a promising candidate for on-board methane storage.展开更多
Mesoporous silica KIT-6 with different pore sizes was controllably synthesized by hydrothermal meth- ods. The same contents of Pt were loaded on KIT-6 sup- ports to apply for propane total oxidation. Low-angle X-ray d...Mesoporous silica KIT-6 with different pore sizes was controllably synthesized by hydrothermal meth- ods. The same contents of Pt were loaded on KIT-6 sup- ports to apply for propane total oxidation. Low-angle X-ray diffraction (XRD), nitrogen adsorption-desorption, CO chemisorption and transmission electron microscopy (TEM) were carried out to investigate the physicochemical properties of the catalysts. The results reveal that different pore sizes of KIT-6 supports could affect the Pt particle sizes on KIT-6. The mesopores on KIT-6-80 and KIT-6- 130 effectively confine the size of the inside Pt nanopar- ticles during calcining. Pt/KIT-6-80 with the appropriate pore size as well as the Pt particle size exhibits the best catalytic performance with T50 (the temperature at which hydrocarbon (HC) conversion reaches 50%) of only 237 ℃. However, Pt particles prefer dispersing on the external surface of KIT-6-40 due to those too small pores.展开更多
Background:Carbapenemase-producing Klebsiella pneumoniae(CP-Kp)poses distinct clinical challenges due to extensively drug resistant(XDR)phenotype,and sequence type(ST)11 is the most dominant blaKPC-2-bearing CP-Kp clo...Background:Carbapenemase-producing Klebsiella pneumoniae(CP-Kp)poses distinct clinical challenges due to extensively drug resistant(XDR)phenotype,and sequence type(ST)11 is the most dominant blaKPC-2-bearing CP-Kp clone in China.The purpose of this current retrospective study was to explore the genetic factors associated with the success of XDR CP-Kp ST11 strains circulated in the intensive care unit(ICU)of a Chinese tertiary hospital.Methods:Six ST11 XDR CP-Kp strains were identified between May and December 2014 and validated by minimum inhibitory concentration examination,polymerase chain reaction,and pyrosequencing.The six ST11 XDR CP-Kp,as well as three multi-drug resistant(MDR)and four susceptible strains,were sequenced using single-molecule real-time method.Comprehensively structural and functional analysis based on comparative genomics was performed to identify genomic characteristics of the XDR ST11 CP-Kp strains.Results:We found that ST11 XDR blaKPC-2-bearing CP-Kp strains isolated from inpatients spread in the ICU of the hospital.Functionally,genes associated with information storage and processing of the ST11 XDR CP-Kp strains were more abundant than those of MDR and susceptible strains,especially genes correlative with mobile genetic elements(MGEs)such as transposons and prophages.Structurally,eleven large-scale genetic regions taken for the unique genome in these ST11 XDR CP-Kp strains were identified as MGEs including transposons,integrons,prophages,genomic islands,and integrative and conjugative elements.Three of them were located on plasmids and eight on chromosomes;five of them were with antimicrobial resistance genes and eight with adaptation associated genes.Notably,a new blaKPC-2-bearingΔΔTn1721-blaKPC-2 transposon,probably transposed and truncated fromΔTn1721-blaKPC-2 by IS903D and ISKpn8,was identified in all six ST11 XDR CP-Kp strains.Conclusion:Our findings suggested that together with clonal spread,MGEs identified uniquely in the ST11 XDR CP-Kp strains might contribute to their formidable adaptability,which facilitated their widespread dissemination in hospital.展开更多
Objective: This study evaluated the effectiveness of acupuncture treatment on postoperative pain in patients with degenerative lumbar spine disease, and explored the relationship between the postoperative analgesic ef...Objective: This study evaluated the effectiveness of acupuncture treatment on postoperative pain in patients with degenerative lumbar spine disease, and explored the relationship between the postoperative analgesic effect of acupuncture and the sensation of acupuncture experienced by the patients.Methods: This retrospective study analyzed the medical records of 97 patients who had undergone an operation by the same surgeon due to degenerative lumbar disease. These patients were divided into acupuncture group(n = 32), patient-controlled analgesia(PCA) group(n = 27), and oral analgesia group(n = 38) according to the different postoperative analgesic methods. During their hospitalization, patients completed daily evaluations of their pain using a visual analogue scale(VAS), and injection times of supplemental meperidine were recorded. Also, the Chinese version of the Massachusetts General Hospital Acupuncture Sensation Scale(C-MASS) was used in the acupuncture group.Results: Each of the three treatment groups showed significant reductions in postoperative pain, as shown by reduced VAS scores. The acupuncture group, however, had less rebound pain(P < 0.05) than the other two groups. Both the acupuncture and PCA groups experienced acute analgesic effects that were superior to those in the oral analgesia group. In addition, the higher the C-MASS index on the second day after surgery, the lower the VAS score on the fourth day after surgery. There was also a significant difference in the“dull pain” in the acupuncture sensation.Conclusion: The results demonstrated that acupuncture was beneficial for postoperative pain and discomfort after simple surgery for degenerative spinal disease. It is worth noting that there was a disproportionate relevance between the patient’s acupuncture sensation and the improvement of pain VAS score.展开更多
In this study,the peroxidase-like activity of zirconium(Ⅳ)oxide nanoparticles(nZr)is reported.Peroxidases catalyze the oxidation of their substrate in the presence of peroxide species.3,3′,5,5′-tetramethylbenzidine...In this study,the peroxidase-like activity of zirconium(Ⅳ)oxide nanoparticles(nZr)is reported.Peroxidases catalyze the oxidation of their substrate in the presence of peroxide species.3,3′,5,5′-tetramethylbenzidine(TMB)is a peroxidase substrate,and we have demonstrated that nZr oxidizes the TMB in the presence of hydrogen peroxide resulting in a colored(TMBox)product.The reaction was tested in various buffers,and sodium acetate with pH 4 was observed to be an ideal buffer for the enzymatic reaction and the dispersity of the nZr in the solution.The nanozyme behavior was studied systematically at three different temperatures(25,35 and 45℃)and a wide range of H_(2)O_(2) concentrations.The dependence of the enzymatic reaction on temperature,nZr content and H_(2)O_(2) concentration was observed.The enzymatic reaction was tested in different protein solutions and no noticeable interference was observed with these proteins.Overall,we demonstrate that nZr,which is often used for industrial applications,mimics peroxidase enzyme and catalyzes oxidation of its substrate in the presence of peroxide species.展开更多
Herein we report two highly porous Zr-based metal-organic frameworks (MOFs, 1 and 2) constructed by the truncated octahedral secondary building unit (SBU) of Zr604(OH)4(CO2)12 and the organic linear ligand of ...Herein we report two highly porous Zr-based metal-organic frameworks (MOFs, 1 and 2) constructed by the truncated octahedral secondary building unit (SBU) of Zr604(OH)4(CO2)12 and the organic linear ligand of 4,4'-stilbenedicarboxylic acid (H2sbdc) or 4,4'-azobenezenedicarboxylic acid (H2abdc). Both Zr-based MOFs are obtained as single crystals of suitable size for single-crystal X-ray diffraction analysis. Furthermore, these two Zr-based MOFs have been fully characterized by powder X-ray diffraction (PXRD) studies, thermogravimetric analysis (TGA), infrared spectroscopy (IR) and gas adsorption analysis. In particular, their CO2 gas adsorption behaviors have been investigated and discussed.展开更多
Dear Editor,Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)is an RNA virus of the Coronaviridae family causing the outbreak and worldwide pandemic of coronavims disease 2019(COVID-19)(Zhou et al.,2020b;Zhu...Dear Editor,Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)is an RNA virus of the Coronaviridae family causing the outbreak and worldwide pandemic of coronavims disease 2019(COVID-19)(Zhou et al.,2020b;Zhu et al.,2020b).As an emergent and unprecedented global threat to public health,it has affected about 162 million individuals with over 3.3 million deaths until the middle of May.In attributed to the extensive studies on SARS-CoV-2,several kinds of vaccines are currently available which brings hope to human society for alleviating and eventually preventing COVID-19 epidemic(Zhu et al.,2020a;Xia et al.,2021).However,a better understanding of viral pathogenesis,particularly the viral-host interaction,are needed to develop effective interventions.展开更多
基金Supported by the Research on Intelligent Recommendation Decision Model of Geriatrics Based on Big Data,No.2021CX01010136.
文摘BACKGROUND Tuberculosis is a chronic infectious disease and an important public health pro-blem.Despite progress in controlling tuberculosis,the incidence of tuberculosis in China is still very high,with 895000 new cases annually.This case report des-cribes the investigation of a case of severe disseminated tuberculosis in a young adult with normal immune function,conducted to ascertain why a Mycobacterium tuberculosis(M.tuberculosis)strain caused such severe disease.CASE SUMMARY A previously healthy 28-year-old woman presented to our hospital with a 1-mo-nth history of fever and fatigue.She was diagnosed with severe disseminated pulmonary tuberculosis,spinal tuberculosis with paravertebral abscesses,and tuberculous meningitis.M.tuberculosis was isolated from bronchoal-veolar lavage fluid.She was treated with standard antituberculous therapy and underwent debridement,bone graft,and internal fixation surgery for spinal tuberculosis.She responded to therapy and regained her ability to walk following the surgery.We analysed the whole-genome sequence of the strain and designated it BLM-A21.Additional M.tuberculosis genomes were selected from the Virulence Factor Database(http://www.mgc.ac.cn/cgi-bin/VFs/genus.cgi?Genus=Mycobacterium)for comparison.An evolutionary tree of the BLM-A21 strain was built using PhyML maximum likelihood software.Further gene analysis revealed that,except for the pks1 gene,BLM-A21 had similar virulence genes to the CDC 1551 and H37Rv strains,which have lower dissemination.CONCLUSION We speculate that the pks1 virulence gene in BLM-A21 may be the key virulence gene responsible for the wide-spread dissemination of M.tuberculosis infection in this previously healthy adult with normal immune function.
基金supported by grants from the National Natural Science Foundation of China (82072693, 81902417 and 82172884)the Scientific Innovation Project of Shanghai Education Commit-tee (2019-01-07-00-07-E00057)+2 种基金Clinical and Scientific Innovation Project of Shanghai Hospital Development Center (SHDC12018109)Clinical Research Plan of Shanghai Hospital Development Center (SHDC2020CR1006A)National Key Research and Development Program of China (2020YFA0803202)。
文摘Background: Open pancreaticoduodenectomy(OPD) with portal or superior mesenteric vein resection and reconstruction has been applied in pancreatic cancer patients with tumor infiltration or adherence. However, it is controversial whether laparoscopic pancreaticoduodenectomy(LPD) with major vascular resection and reconstruction is feasible. This study aimed to evaluate the safety and feasibility of LPD with major vascular resection compared with OPD with major vascular resection. Methods: We reviewed data for all pancreatic cancer patients undergoing LPD or OPD with vascular resection at Department of Pancreatic Surgery, Fudan University Shanghai Cancer Center, between February 2018 and May 2022. We compared the preoperative, intraoperative, and postoperative clinicopathological data of the two groups to conduct a comprehensive evaluation of LPD with major vascular resection. Results: A total of 63 patients underwent pancreaticoduodenectomy(PD) with portal or superior mesenteric vein resection and reconstruction, including 25 LPDs and 38 OPDs. The LPD group had less intraoperative blood loss(200 vs. 400 m L, P < 0.001), lower proportion of intraoperative blood transfusion(16.0% vs. 39.5%, P = 0.047), longer operation time(390 vs. 334 min, P = 0.004) and shorter postoperative hospital stay(11 vs. 14 days, P = 0.005). There was no perioperative death in all patients. There was no significant difference in the incidence of total postoperative complications, grade B/C postoperative pancreatic fistula, delayed gastric emptying and abdominal infection between the two groups. No postpancreatectomy hemorrhage nor bile leakage occurred during perioperative period. There was no significant difference in R0 resection rate and number of lymph nodes harvested between the two groups. Patency of reconstructed vessels in the two groups were 96.0% and 92.1%, respectively( P = 0.927). Conclusions: LPD with portal or superior mesenteric vein resection and reconstruction was safe, feasible and oncologically acceptable for selected patients with pancreatic cancer, and it can achieve similar or even better perioperative results compared to open approach.
文摘AIM To explore expression of angiopoietin-like protein 2(ANGpT L2) and its effect on biological behavior such as proliferation and invasiveness in gastric cancer. METHODS Western blotting was used to detect expression of ANGp TL2 in 60 human normal gastric tissues, 60 human gastric cancer tissues and gastric cell lines including GES-1, N87, SGC7901, BGC823 and pA MC82. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) and Transwell assay were used to detect the proliferation and invasive ability of gastric cancer cells. RESULTS Compared to normal tissues, ANGp TL2 protein levels were significantly upregulated in gastric tissues, and this level was closely correlated with gastric tumor grade, clinical stage and lymph node metastasis. Compared to GES-1 cells, ANGpT L2 mR NA and protein levels were significantly increased in gastric cancer cells including N87, SGC7901, BGC823 and p AMC82. The expression of ANGpT L2 in highly malignant gastric cancer cell lines BGC823 and pA MC82 was significantly higher than in low malignancy gastric cancer cell lines N87 and SGC7901. MTT and Transwell experiments indicated that the proliferation rate and invasive ability of stable overexpressed gastric cancer cells was faster than in cells transfected with Lv-NC and blank controlcells, and the invasive ability of stable overexpressed gastric cancer cells was higher than that of cells transfected with Lv-NC and blank control cells.CONCLUSION ANGp TL2 contributed to proliferation and invasion of gastric cancer cells. In clinical treatment, ANGpT L2 may become a new target for treatment of gastric cancer.
文摘AIM: To explore the regulatory mechanism of the target gene of micro RNA-21(mi R-21), phosphatase gene(p TEN), and its downstream proteins, protein kinase B(AKT) and phosphatidylinositol 3-kinase(p I3K), in colorectal cancer(CRC) cells. METHODS: Quantitative real-time p CR(q RT-p CR) and Western blot were used to detect the expression levels of mi R-21 and p TEN in HCT116, HT29, Colo32 and SW480 CRC cell lines. Also, the expression levels of p TEN m RNA and its downstream proteins AKT and p I3 K in HCT116 cells after downregulating mi R-21 were investigated. RESULTS: Comparing the mi R-21 expression in CRC cells, the expression levels of mi R-21 were highest in HCT116 cells, and the expression levels of mi R-21 were lowest in SW480 cells. In comparing mi R-21 and p TEN expression in CRC cells, we found that the protein expression levels of mi R-21 and p TEN were inversely correlated(p < 0.05); when mi R-21 expression was reduced, m RNA expression levels of p TEN did not significantly change(p > 0.05), but the expression levels of its protein significantly increased(p < 0.05). In comparing the levels of p TEN protein and downstream AKT and p I3 K in HCT116 cells after downregulation of mi R-21 expression, the levels of AKT and p I3 K protein expression significantly decreased(p < 0.05). CONCLUSION: p TEN is one of the direct target genesof mi R-21. Thus, phosphatase gene and its downstream AKT and p I3 K expression levels can be regulated by regulating the expression levels of mi R-21, which in turn regulates the development of CRC.
文摘Crohn’s disease(CD)is a complex and relapsing gastrointestinal disease with mesenteric alterations.The mesenteric neural,vascular,and endocrine systems actively take part in the gut dysbiosis-adaptive immunity-mesentery-body axis,and this axis has been proven to be bidirectional.The abnormalities of morphology and function of the mesenteric component are associated with intestinal inflammation and disease progress of CD via responses to afferent signals,neuropeptides,lymphatic drainage,adipokines,and functional cytokines.The hypertrophy of mesenteric adipose tissue plays important roles in the pathogenesis of CD by secreting large amounts of adipokines and representing a rich source of proinflammatory or profibrotic cytokines.The vascular alteration,including angiogenesis and lymphangiogenesis,is concomitant in the disease course of CD.Of note,the enlarged and obstructed lymphatic vessels,which have been described in CD patients,are likely related to the early onset submucosa edema and being a cause of CD.The function of mesenteric lymphatics is influenced by endocrine of mesenteric nerves and adipocytes.Meanwhile,the structure of the mesenteric lymphatic vessels in hypertrophic mesenteric adipose tissue is mispatterned and ruptured,which can lead to lymph leakage.Leaky lymph factors can in turn stimulate adipose tissue to proliferate and effectively elicit an immune response.The identification of the role of mesentery and the crosstalk between mesenteric tissues in intestinal inflammation may shed light on understanding the underlying mechanism of CD and help explore new therapeutic targets.
文摘Background: Talaromyces (Penicillium) marneffei (TIM) is an emerging dimorphic human pathogenic fungus that is endemic to Southeast Asia. TM mostly occurs as an opportunistic infection in patients with human immunodeficiency virus (HIV). The objective of this study was to compare the clinical and laboratory parameters of patients with TM infections who were HIV-positive and HIV-negative and to assess therapies and outcomes. Methods: This was a retrospective analysis of 26 patients diagnosed with disseminated TM infection from September 2005 to April 2014 at Fujian Provincial Hospital, China. Results: Patients with TM infection tend to present with fever, weight loss, and anemia. The time from symptom onset to confirmed diagnosis was greater for HlV-negative patients (n 7; median: 60 days, range: 14-365 days) than for HIV-positive patients (n = 19; median: 30 days, range: 3-90 days, Mann-Whitney U= 31.50, P = 0.041). HIV-negative patients were more likely to have dyspnea (57.1% vs. 5.3%, Z: = 8.86, P = 0.010), low neutrophil count (Mann-Whitney U = 27.00, P = 0.029), high CD4 count (Mann-Whitney U= 0.00, P 0.009), and high lymphocyte count (Mann-Whitney U = 21.00, P = 0.009). There were no significant differences in other demographic, clinical, or biochemical characteristics. Among all the patients, 12 HIV-positive patient and 1 HlV-negative patient received amphotericin and fluconazole treatment, 9 of whom improved, l died, 2 had kidney damage, 1 had hypokalemia due to exceeded doses. Conclusions: HIV-negative patients with TM infections tend to have a longer diagnostic interval, a higher percentage of dyspnea, higher levels of CD4 and lymphocytes, and lower neutrophil counts than TM infection in HIV-positive patients. Treatment programs with amphotericin and fluconazole are mostly effective.
基金supported by grants from National Key R&D Program of China(2020YFC0848900)CAS Key Research Projects of the Frontier Science(QYZDY-SSW-SMC027)+5 种基金National Natural Science Foundation of China(31625016 and 81788101)K.C.Wong Education Foundation(GJTD-2019-08)Chinese Academy of Medical Sciences(CAMS)Initiative for Innovative Medicine(2016-I2M-2-001,2017-I2M-2-006,2020-I2M-CoV19-003,2020-I2M-CoV19-007)the Youth Innovation Promotion Association,CAS(2018133)China National Postdoctoral Program for Innovative Talents(BX2021291)Shanghai Municipal Science and Technology Major Project(2017SHZDZX01).
文摘SARS-CoV-2 infection causes complicated clinical manifestations with variable multi-organ injuries,how-ever,the underlying mechanism,in particular immune responses in different organs,remains elusive.In this study,comprehensive transcriptomic alterations of 14 tissues from rhesus macaque infected with SARS-CoV-2 were analyzed.Compared to normal controls,SARS-CoV-2 infection resulted in dysregulation of genes involving diverse functions in various examined tissues/organs,with drastic transcriptomic changes in cerebral cortex and right ventricle.Intriguingly,cerebral cortex exhibited a hyperinflammatory state evidenced by sig-nificant upregulation of inflammation response-related genes.Meanwhile,expressions of coagulation,angio-genesis and fibrosis factors were also up-regulated in cerebral cortex.Based on our findings,neuropilin 1(NRP1),a receptor of SARS-CoV-2,was significantly elevated in cerebral cortex post infection,accompanied by active immune response releasing inflammatory factors and signal transmission among tissues,which enhanced infection of the central nervous system(CNS)in a positive feedback way,leading to viral encephalitis.Overall,our study depicts a multi-tissue/organ tran-scriptomic landscapes of rhesus macaque with early infection of SARS-CoV-2,and provides important insights into the mechanistic basis for COVID-19-asso-ciated clinical complications.
基金the U.S.Department of Energy's Office of Energy Efficiency and Renewable Energy under the Hydrogen and Fuel Cell Technologies and Vehicle Technologies Offices under Award Number DE-EE0008812.S.K.acknowledges the financial support from the University Grants Commission(UGC),New Delhi,India(No.F 5-80/2014(IC)).ChemMatCARS Sector 15 is principally supported by the Divisions of Chemistry(CHE)and Materials Research(DMR),National Science Foundation,under Grant Number NSF/CHE-1346572.Use of the Advanced Photon Source,an Office of Science User Facility operated for the U.S.Department of Energy(DOE)Office of Science by Argonne National Laboratory,was supported by the U.S.DOE under Contract No.DE-AC02-06CH11357.G.V.would further like to acknowledge Jason Exley(Sales Engineer,Micromeritics USA)for help and support provided with the measurements and the HKUST reference data.
文摘Emerging as an outperformed class of metal-organic frameworks(MOFs),square-octahedron(soc)topology MOFs(soc-MOFs)feature superior properties of high porosity,large gas storage capacity,and excellent thermal/chemical stability.We report here an iron based soc-MOF,denoted as Fe-pbpta(H4pbpta=4,4',4'',4'''-(1,4-phenylenbis(pyridine-4,2-6-triyl))-tetrabenzoic acid)possessing a very high Brunauer,Emmett and Teller(BET)surface area of 4,937 m2/g and a large pore volume of 2.15 cm3/g.The MOF demonstrates by far the highest gravimetric uptake of 369 cm3(STP)/g under the DOE operational storage conditions(35 bar and 298 K)and a high volumetric deliverable capacity of 192 cc/cc at 298 K and 65 bar.Furthermore,Fe-pbpta exhibits high thermal and aqueous stability making it a promising candidate for on-board methane storage.
基金financially supported by the National Key Research and Development Program of China (No.2016YFC0205000)the Ministry of Science and Technology of China (No.2015AA034603)
文摘Mesoporous silica KIT-6 with different pore sizes was controllably synthesized by hydrothermal meth- ods. The same contents of Pt were loaded on KIT-6 sup- ports to apply for propane total oxidation. Low-angle X-ray diffraction (XRD), nitrogen adsorption-desorption, CO chemisorption and transmission electron microscopy (TEM) were carried out to investigate the physicochemical properties of the catalysts. The results reveal that different pore sizes of KIT-6 supports could affect the Pt particle sizes on KIT-6. The mesopores on KIT-6-80 and KIT-6- 130 effectively confine the size of the inside Pt nanopar- ticles during calcining. Pt/KIT-6-80 with the appropriate pore size as well as the Pt particle size exhibits the best catalytic performance with T50 (the temperature at which hydrocarbon (HC) conversion reaches 50%) of only 237 ℃. However, Pt particles prefer dispersing on the external surface of KIT-6-40 due to those too small pores.
基金the Chinese Ministry of Science and Technology(No.2016YFC0903800)the National Natural Science Foundation of China(No.81870010)the Natural Science Foundation of Beijing Municipality(No.7192217)。
文摘Background:Carbapenemase-producing Klebsiella pneumoniae(CP-Kp)poses distinct clinical challenges due to extensively drug resistant(XDR)phenotype,and sequence type(ST)11 is the most dominant blaKPC-2-bearing CP-Kp clone in China.The purpose of this current retrospective study was to explore the genetic factors associated with the success of XDR CP-Kp ST11 strains circulated in the intensive care unit(ICU)of a Chinese tertiary hospital.Methods:Six ST11 XDR CP-Kp strains were identified between May and December 2014 and validated by minimum inhibitory concentration examination,polymerase chain reaction,and pyrosequencing.The six ST11 XDR CP-Kp,as well as three multi-drug resistant(MDR)and four susceptible strains,were sequenced using single-molecule real-time method.Comprehensively structural and functional analysis based on comparative genomics was performed to identify genomic characteristics of the XDR ST11 CP-Kp strains.Results:We found that ST11 XDR blaKPC-2-bearing CP-Kp strains isolated from inpatients spread in the ICU of the hospital.Functionally,genes associated with information storage and processing of the ST11 XDR CP-Kp strains were more abundant than those of MDR and susceptible strains,especially genes correlative with mobile genetic elements(MGEs)such as transposons and prophages.Structurally,eleven large-scale genetic regions taken for the unique genome in these ST11 XDR CP-Kp strains were identified as MGEs including transposons,integrons,prophages,genomic islands,and integrative and conjugative elements.Three of them were located on plasmids and eight on chromosomes;five of them were with antimicrobial resistance genes and eight with adaptation associated genes.Notably,a new blaKPC-2-bearingΔΔTn1721-blaKPC-2 transposon,probably transposed and truncated fromΔTn1721-blaKPC-2 by IS903D and ISKpn8,was identified in all six ST11 XDR CP-Kp strains.Conclusion:Our findings suggested that together with clonal spread,MGEs identified uniquely in the ST11 XDR CP-Kp strains might contribute to their formidable adaptability,which facilitated their widespread dissemination in hospital.
文摘Objective: This study evaluated the effectiveness of acupuncture treatment on postoperative pain in patients with degenerative lumbar spine disease, and explored the relationship between the postoperative analgesic effect of acupuncture and the sensation of acupuncture experienced by the patients.Methods: This retrospective study analyzed the medical records of 97 patients who had undergone an operation by the same surgeon due to degenerative lumbar disease. These patients were divided into acupuncture group(n = 32), patient-controlled analgesia(PCA) group(n = 27), and oral analgesia group(n = 38) according to the different postoperative analgesic methods. During their hospitalization, patients completed daily evaluations of their pain using a visual analogue scale(VAS), and injection times of supplemental meperidine were recorded. Also, the Chinese version of the Massachusetts General Hospital Acupuncture Sensation Scale(C-MASS) was used in the acupuncture group.Results: Each of the three treatment groups showed significant reductions in postoperative pain, as shown by reduced VAS scores. The acupuncture group, however, had less rebound pain(P < 0.05) than the other two groups. Both the acupuncture and PCA groups experienced acute analgesic effects that were superior to those in the oral analgesia group. In addition, the higher the C-MASS index on the second day after surgery, the lower the VAS score on the fourth day after surgery. There was also a significant difference in the“dull pain” in the acupuncture sensation.Conclusion: The results demonstrated that acupuncture was beneficial for postoperative pain and discomfort after simple surgery for degenerative spinal disease. It is worth noting that there was a disproportionate relevance between the patient’s acupuncture sensation and the improvement of pain VAS score.
基金This work was supported by the USDA National Institute of Food and Agriculture(NIFA),AFRI project(2018-67021-27973,2017-07822).
文摘In this study,the peroxidase-like activity of zirconium(Ⅳ)oxide nanoparticles(nZr)is reported.Peroxidases catalyze the oxidation of their substrate in the presence of peroxide species.3,3′,5,5′-tetramethylbenzidine(TMB)is a peroxidase substrate,and we have demonstrated that nZr oxidizes the TMB in the presence of hydrogen peroxide resulting in a colored(TMBox)product.The reaction was tested in various buffers,and sodium acetate with pH 4 was observed to be an ideal buffer for the enzymatic reaction and the dispersity of the nZr in the solution.The nanozyme behavior was studied systematically at three different temperatures(25,35 and 45℃)and a wide range of H_(2)O_(2) concentrations.The dependence of the enzymatic reaction on temperature,nZr content and H_(2)O_(2) concentration was observed.The enzymatic reaction was tested in different protein solutions and no noticeable interference was observed with these proteins.Overall,we demonstrate that nZr,which is often used for industrial applications,mimics peroxidase enzyme and catalyzes oxidation of its substrate in the presence of peroxide species.
基金supported by the National Science Foundation (DMR-1352065)the University of South FloridaChemMatCARS Sector 15 is supported by the National Science Foundation (NSF/CHE-1346572)
文摘Herein we report two highly porous Zr-based metal-organic frameworks (MOFs, 1 and 2) constructed by the truncated octahedral secondary building unit (SBU) of Zr604(OH)4(CO2)12 and the organic linear ligand of 4,4'-stilbenedicarboxylic acid (H2sbdc) or 4,4'-azobenezenedicarboxylic acid (H2abdc). Both Zr-based MOFs are obtained as single crystals of suitable size for single-crystal X-ray diffraction analysis. Furthermore, these two Zr-based MOFs have been fully characterized by powder X-ray diffraction (PXRD) studies, thermogravimetric analysis (TGA), infrared spectroscopy (IR) and gas adsorption analysis. In particular, their CO2 gas adsorption behaviors have been investigated and discussed.
基金This work was supported by grants from National Key R&D Program of China(2020YFC0848900,2021YFC0863300,2020YFA0707602,2020YFC0846400,2020YFC0841100)CAS Key Research Projects of the Frontier Science(QYZDY-SSW-SMC027)+4 种基金National Natural Science Foundation of China(31625016 and 81788101)CAMS Innovation Fund for Medical Sciences(2016-I2M-2-001,2016-I2M-2-006,and 2020-I2M-C〇V19-012)Yunnan Key R&D Project(202003AC100003)K.C.Wong Education Foundation(GJTD-2019-08)the Youth Innovation Promotion Association,CAS(2018133).
文摘Dear Editor,Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)is an RNA virus of the Coronaviridae family causing the outbreak and worldwide pandemic of coronavims disease 2019(COVID-19)(Zhou et al.,2020b;Zhu et al.,2020b).As an emergent and unprecedented global threat to public health,it has affected about 162 million individuals with over 3.3 million deaths until the middle of May.In attributed to the extensive studies on SARS-CoV-2,several kinds of vaccines are currently available which brings hope to human society for alleviating and eventually preventing COVID-19 epidemic(Zhu et al.,2020a;Xia et al.,2021).However,a better understanding of viral pathogenesis,particularly the viral-host interaction,are needed to develop effective interventions.