1.Effect of excitatory amino acids、Ca~(2+) on delayed neuronal death in hippocampus following transient forebrain ischemia in gerbils
Chinese Journal of Pathophysiology 1986;0(02):-
The contents of amino acids in dorsal hippocampus were measured at themoment of 10-min transient forebrain ischemia by using amino acid autoanalyser, delayedneuronal death (DND) model was established by bilateral carotid arteries occlusion for10-min followed by 7-day reperfusion. Effect of monosodium glutamate, ketamine on DNDin the hippocampus was examined by counting neuronal density in CA_1 sector. The Ca~(2+)content in dorsal hippocampus was measured, and the effect of ketamine on Ca~(2+) concen- tration was examined. The results showed that the contents of glutamate and aspartate indorsal hippocampus were increased significantly at the moment of 10-min transient fore-brain ischemia (P0.05). These results suggested that excitatory amino acids (EAA)and Ca~(2+) played an important role directly or indirectly in the development of DND inhippocampus following transient forebrain ischemia in gerbils; ca~(2+) over-load may be ancommon final pathway of neuronal death.
2.Clinical study of techniques for cadaveric donor nephrectomy (report of 1439 cases)
Linxin YU ; Xiaoyou LIU ; Jian XU
Chinese Journal of Urology 2000;0(12):-
Objective To explore the best procurement technology for cadaveric donor nephrectomy. Methods Clinical data of 1 439 donors nephrectomy in the past 24 years were retrospected.Bilateral nephrectomy,en bloc removal of both kidneys and en bloc removal with in situ cooling both kidneys were adopted in different periods of time.Operation time(OT),hot ischemia time(HIT),cold ischemia time(CIT),total ischemia time(TIT), renal graft beginning to produce urine time after revascularization(UT),renal function recovery time(RRT), damage rate(DR),quantity of preservation solution(PS), rate of acute tubular necrosis(ATN),primary non function(PNF) and poor perfusion of donor kidney(PPK) were observed and comparad among the 3 techniques. Results 216 cases were accomplished by bilateral nephrectomy and 432 kidneys were procured.1 134 cases were accomplished by en bloc removal and 2 264 kidneys were procured(4 cases had only one kidney each).Eighty nine cases were accomplished by en bloc removal with in situ cooling and 178 kidneys were procured. HIT of these three techniques (bilateral nephrectomy,en bloc removal and en bloc removal with in situ cooling) were 8.22?3.01min?5.35?1.88min?1.89?0.92min ( P 0.05).UT were ( 28.24 ?10.65)min,(22.72?8.35)min,(9.26? 10.95 )min.RRT were (9.98?6.84)d,( 7.59 ?6.35)d,(4.91? 7.68 )d.ATN were 15.40%,7.31%,3.98%( P
3.Effects of Leukocyte in the Injured Areas on Brain Edema After Brain Contusion in Rats
Linxin XU ; Yunsheng LIU ; Dan JI
Journal of Chinese Physician 2000;0(12):-
Objective To explore the effects of leukocyte in the injured foci on brain edema after brain contusion,in order to provide theoretical basis of clincial treatment of traumatic brain injury.Methods Traumatic brain injured animal model was established with injecton of blood components,forty five rats were randomly divided into three groups i.e,traumatic brain injure (TBI) group,whole blood(WB)group and white blood cell(WBC) group.Each group was further divided into three subgroups.All rats were killed at 24, 72 or 120 hours after injury,the water content, sodium, potassium and calcium contents were measured in brain tissue of areas injured.Results There was a peak of brain water and sodium contents in TBI, WB and WBC groups at 3 days after injury;Brain water content of TBI group was significantly lower than both WB group and WBC group (P
4.Association of HbA1C with serum uric acid among inpatients with type 2 diabetes mellitus
Yuesu LIU ; Xianghai ZHOU ; Linxin XU ; Mengduan PANG ; Yan DUAN ; Xueying GAO ; Ping HU ; Yan LIU
Chinese Journal of Endocrinology and Metabolism 2016;32(4):300-304
[Summary] Data from 1 589 consecutive inpatients with type 2 diabetes mellitus from January 2012 to March 2015 were collected. The patients were divided into five groups according to the quintile of HbA1C . The association between serum uric acid ( SUA) and HbA1C was tested using a general linear model after adjusting for age, body mass index ( BMI) , systolic blood pressure, and creatinine. Linear regression analysis was used to analyze the association between SUA and HbA1C in patients with HbA1C<9. 0% and HbA1C≥9. 0%, respectively. The results showed that BMI, waist circumference, triglycerides, and the incidence of fatty liver were elevated with increased serum uric acid level. SUA was negatively associated with HbA1C level in inpatients with type 2 diabetes. However, SUA should be measured after glycemic control in men with HbA1C≥7. 0% and women with HbA1C≥9. 0%.
5.Association of carotid artery and lower-extremity artery atherosclerosis and coronary heart disease or cerebral infarction in type 2 diabetes
Shan LIU ; Xianghai ZHOU ; Ping HU ; Mengduan PANG ; Yan DUAN ; Yan LIU ; Yuesu LIU ; Linxin XU
Chinese Journal of Endocrinology and Metabolism 2016;32(12):989-994
cerebral infarction as compare with patients at Grade 1-2 in both vascular locations, whereas the risk was not significantly increased in patients at Grade 3-4 in only one vascular location. Conclusions The simple method of assessing the degree of arterial atherosclerosis can be used to evaluate carotid artery and lower-extremity artery atherosclerosis in patients with type 2 diabetes. Patients with plaques or stenosis in both vascular locations were with a significantly increased risk of coronary heart disease or cerebral infarction if they were evaluated concurrently.
6.Huge pyogenic liver abscess (PLA) in an elderly patient with diabetes following the pancreaticoduodenectomy
Yunfeng LIU ; Linhui LI ; Yi ZHANG ; Linxin XU ; Jianhong YIN ; Li SUN ; Jing YANG
Chinese Journal of Endocrine Surgery 2019;13(3):256-258
We described an elderly female with type 2 diabetes referred to our hospital with fever,nausea and upper abdominal pain.The patient had got duodenal tumor and received the pancreaticoduodenectomy (PD) 12 years ago.The laboratory examinations revealed white blood cells (WBC) increasing and severe hypocalcemia.Abdominal computed tomography (CT) revealed a huge gas-forming pyogenic liver abscess (PLA) in left lobe of the liver.The patient got cured after correction of calcium metabolism disorders,treatment with antibiotic and receiving percutaneous tube drainage.We concluded that we should remain on high alert of those patients with DM and the history of cancer,when he or she gets fever of unknown origin and abdominal tenderness.PLA should be considered.
7.Construction of eukaryotic expression of mouse derived pcDNA3. 1 ⁃3 × Flag⁃c⁃NUP85 plasmid and its partial function research
Yan Yao ; Shuxian Wang ; Yincui Wu ; Shuang Hu ; Ying Hu ; Linxin Pan ; Tao Xu
Acta Universitatis Medicinalis Anhui 2023;58(5):794-799
Objective:
To construct a mouse derived pcDNA3. 1 ⁃3 × Flag⁃c⁃NUP85 expression plasmid and observe its effect on expression of inflammation factors in LPS⁃induced RAW264. 7 cells , as well as on the proliferation and apoptosis of RAW264. 7 cells.
Methods:
The NUP85 gene was amplified by PCR to construct pcDNA3. 1 ⁃3 × Flag-c⁃NUP85 eukaryotic expression plasmid. The pcDNA3. 1 ⁃3 × Flag⁃c vector was divided with enzymes. The purified PCR product was ligated with the vector, and the ligated product was transformed into bacterial competent cells. After identification by enzyme digestion , sequencing and analysis were performed. Then , it was transfected into RAW264. 7 cells , and the blank plasmid without NUP85 gene was set as the control group. The effect on cell proliferation and apoptosis were detected by CCK⁃8 assay and flow cytometry , and the expression of inflammatory cytokines such as tumor necrosis factor⁃α (TNF⁃α ) and interleukin⁃6 (IL⁃6) in LPS⁃induced RAW264. 7 cells was detected by Western blot and ELISA.
Results:
Enzyme digestion identification and Western blot results showed that pcDNA3. 1 ⁃3 × Flag⁃c⁃NUP85 eukaryotic expression plasmid was successfully constructed and expressed. The results of CCK⁃8 assay showed that the cell survival rate of NUP85 overexpression group was significantly lower than that of control group after 24 h[(0. 55 ± 0. 03) vs (0. 67 ± 0. 05) , F = 30. 98 , P < 0. 05 ] . The results of flow cytometry showed that the cell apoptosis rate of NUP85 overexpression group was higher than that of control group[( 15. 78 ±1. 05)% vs ( 13. 40 ± 0. 47)% , F = 75. 38 , P < 0. 05] . The results of Western blot and ELISA showed that after transfection of pcDNA3. 1 ⁃3 × Flag⁃c⁃NUP85 , the expression of TNF⁃α and IL⁃6 in RAW264. 7 cells were higher than those in the control group ,with statistical significance (P < 0. 05) .
Conclusion
NUP85 can inhibit the proliferation and promote apoptosis in LPS⁃stimulated RAW264. 7 cells , and NUP85 can promote the expression of inflammatory cytokines IL⁃6 and TNF⁃α in LPS⁃stimulated RAW264. 7 cells.
8.A YAP/TAZ-CD54 axis is required for CXCR2-CD44- tumor-specific neutrophils to suppress gastric cancer.
Pingping NIE ; Weihong ZHANG ; Yan MENG ; Moubin LIN ; Fenghua GUO ; Hui ZHANG ; Zhenzhu TONG ; Meng WANG ; Fan CHEN ; Liwei AN ; Yang TANG ; Yi HAN ; Ruixian YU ; Wenjia WANG ; Yuanzhi XU ; Linxin WEI ; Zhaocai ZHOU ; Shi JIAO
Protein & Cell 2023;14(7):513-531
As an important part of tumor microenvironment, neutrophils are poorly understood due to their spatiotemporal heterogeneity in tumorigenesis. Here we defined, at single-cell resolution, CD44-CXCR2- neutrophils as tumor-specific neutrophils (tsNeus) in both mouse and human gastric cancer (GC). We uncovered a Hippo regulon in neutrophils with unique YAP signature genes (e.g., ICAM1, CD14, EGR1) distinct from those identified in epithelial and/or cancer cells. Importantly, knockout of YAP/TAZ in neutrophils impaired their differentiation into CD54+ tsNeus and reduced their antitumor activity, leading to accelerated GC progression. Moreover, the relative amounts of CD54+ tsNeus were found to be negatively associated with GC progression and positively associated with patient survival. Interestingly, GC patients receiving neoadjuvant chemotherapy had increased numbers of CD54+ tsNeus. Furthermore, pharmacologically enhancing YAP activity selectively activated neutrophils to suppress refractory GC, with no significant inflammation-related side effects. Thus, our work characterized tumor-specific neutrophils in GC and revealed an essential role of YAP/TAZ-CD54 axis in tsNeus, opening a new possibility to develop neutrophil-based antitumor therapeutics.
Humans
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Animals
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Mice
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Adaptor Proteins, Signal Transducing/metabolism*
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Transcription Factors/metabolism*
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Stomach Neoplasms/pathology*
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Neutrophils/pathology*
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Signal Transduction/genetics*
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YAP-Signaling Proteins
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Tumor Microenvironment
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Hyaluronan Receptors/genetics*