Endoplasmic reticulum stress induced immunosuppressive effects / 中国免疫学杂志

Endoplasmic reticulum stress(ERS)is a subcellular pathological state formed by imbalance of environment in endoplasmic reticulum,and is regarded as an important pathway that mediates apoptosis.Recent studies have found that after ERS occurs in various immune tissues and cells,immunosuppressive effect that produced is involved in regulating body's immune homeo-stasis,affecting occurrence,outcome and prognosis of many diseases.This article reviews production of ERS,signal regulation and pathophysiological changes in immune organs and immune cells,and its role in development of inflammatory diseases and tumors.

Establishment of the rat sepsis model by intraperitoneal injection of allogenic fecal filtrate / 安徽医科大学学报

Objective @#To explore the method of intraperitoneal injection of allogenic fecal filtrate to establish the rat model of moderate and severe sepsis．@*Methods@#The preparation method of allogeneic fecal filtrate was determined．Allogeneic fecal filtrate of different concentrations (0. 5，1，2 g / kg) was injected intraperitoneally to observe the general situation，survival time and severe degree of sepsis of rats. After determining the optimal concentration，the success rate of the model，serum inflammatory factors，serum concentration of D-lactic acid ( D-LA) and serum intestinal fatty acid binding protein (I-FABP) ，lung function changes，lung，liver and kidney tissue injury were further observed. @*Results@#After intraperitoneal injection of allogenic fecal filtrate for 24 h，the rats of 1 g / kg group presented fever，tachypnea and hypotension，the survival rate was 83. 3% at 24 h and 16. 7% at 48 h， 2 g / kg group rats all died within 24 h，the dose of 1 g / kg was determined for subsequent experiments．Injected fecal filtrate for 24 h，the success rate of the sepsis model was 77. 8% . The levels of interleukin-6 ( IL-6) ，tumor necrosis factor-α ( TNF-α) ，D-LA and I-FABP in serum significantly increased． There were severe edema and bleeding in lung tissue，Pulmonary function appeared respiratory dysfunction，included functional residual capacity (FRC) ，quasi static compliance ( Cdyn) ，forced expiratory volume for the first 100 milliseconds(FEV100) ，peak expiratory flow (PEF) decreased，airway resistance (RI) ，inspiratory capacity (IC) increased．Liver and kidney tissues also showed varying degrees of edema and inflammatory cell infiltration，the levels of alanine aminotransferase (ALT) ，aspartate aminotransferase (AST) ，blood urea nitrogen (BUN) and creatinine ( Cr) in serum significantly increased．@*Conclusion@#Intraperitoneal injection of allogenic fecal filtrate ( 1 g / kg) can produce a relative typical septic model in rats.

Teaching reform and practice of pathophysiology guided by the cultivation of "clinical competence" / 中华医学教育探索杂志

In order to adapt to the development of higher medical education, it is imperative to carry out a student-centered teaching reform of pathophysiology guided by the cultivation of "clinical competence". The main contents of this teaching reform of pathophysiology include: the teaching content layout has been reconstructed to promote classroom teaching with clinical manifestation, new media means such as blackboard online teaching system, WeChat public platform and Chaoxing virtual classroom have been applied to assist students in their learning, and students are encouraged to conduct literature retrieval and reading, and then make presentation PPT for a literature of interest and report to all students to cultivate students' independent learning and sustainable development ability via flipped classroom. The practice shows that the student-centered teaching reform of pathophysiology guided by the cultivation of "clinical competence" has gained successful results.

Effect of metformin on proliferation and differentiation of HaCaT cells and secretion of inflammatory factors by HaCaT cells / 中华皮肤科杂志

Objective To evaluate the effect of mefformin on the human keratinocyte line HaCaT,and to explore its molecular mechanism.Methods HaCaT cells were divided into several groups to be treated with mefformin at different concentrations of 1,2,5,10,20,50 mmol/L for 24,48 and 72 hours.Cell counting kit-8 (CCK-8) assay was performed to evaluate the effect of metformin on the survival rate of HaCaT cells.After 48-hour treatment with metformin at concentrations of 0 (control group),0.5,1,2,5,10 mmol/L,flow cytometry was conducted to evaluate the effect of metformin on cell cycle and apoptosis.Western blot analysis was performed to determine the expression of cell proliferation-and differentiation-related proteins (keratin-16 [K16],K17,K1,involucrin),apoptosis-related proteins (Bax,Bcl-2) and AKT/mTOR/STAT3 pathway proteins.Enzyme-linked immunosorbent assay (ELISA) was conducted to detect the levels of interleukin (IL)-8,tumor necrosis factor (TNF)-α and IL-23 (inflammatory factors) in the culture supernatant of HaCaT cells.Statistical analysis was carried out with SPSS19.0 software using one-way analysis of variance for comparison of the above indices among the 0.5-,1-,2-,5-,10-mmol/L metformin groups and control group,repeated measures analysis of variance for comparisons among different time points or different metformin groups,least significant difference (LSD)-t test for multiple comparisons.Results CCK-8 assay showed that mefformin had inhibitory effects on the proliferation of HaCaT cells (F =116.87,P ＜ 0.05),and the cell survival rates gradually decreased along with the increase in the concentrations of mefformin.After 48-hour treatment with mefformin at concentrations of 0,0.5,1,2,5,10mmol/L,the proportion of HaCaT cells in G2/M phase gradually increased (5.55％ ± 1.03％,6.37％ ±0.93％,8.57％ ± 1.18％,10.05％ ± 0.60％,10.76％ ± 0.87％,13.63％ ± 1.41％,respectively,F =24.98,P ＜0.05),and the early apoptosis rate also gradually increased (0.78％ ± 0.71％,19.18％ ± 1.41％,25.67％ ±1.34％,28.45％ ± 0.92％,34.97％ ± 2.12％,40.41％ ± 1.49％,respectively,F =296.08,P ＜ 0.05).Along with the increase in the concentrations of metformin,there were increasing trends in the expression of K1 and the pro-apoptotic protein Bax (F =8.86,5.38 respectively,both P ＜ 0.05),while there were decreasing trends in the expression of K16,K17 and the apoptotic protein Bcl-2 (F =8.02,4.82,12.10 respectively,all P ＜ 0.05).There was no significant difference in the expression of involucrin among different metformin groups (F =0.57,P ＞ 0.05).After 48-hour treatment with mefformin at different concentrations,the levels of IL-8 and TNF-α in HaCaT cells significantly decreased (F =33.89,14.99 respectively,both P ＜0.05),while there was no significant change in the IL-23 level (F =2.12,P ＞ 0.05).Along with the increase in the concentrations of metformin,the expression of p-AKT,p-mTOR and p-STAT3 significantly decreased (F =11.38,0.35,4.38 respectively,all P ＜ 0.05),but there were no significant changes in the protein expression of AKT,mTOR and STAT3 (F =0.66,0.35,4.24 respectively,all P ＞ 0.05).Conclusion Metformin can inhibit the proliferation,promote the differentiation and apoptosis of HaCaT cells,and inhibit the secretion of inflammatory factors by regulating the AKT/mTOR/STAT3 signaling pathway.

"""Internet+precision medicine "" promote informationalization and integration of medical courses" / 基础医学与临床

Here we reported a research project based on Black-board to integrate medical curriculum .The key points of this research is application of clinical cases as teaching data and facilitate learning of knowledge following the principle of learning by doing and , input the concept of precision medicine and informatics in learning process with an individually designed framework of learning .The learning outcome is evaluated with big data tech-nology and thus creates a student-centered pathway of medical education .

Role of post-hemorrhagic shock mesenteric lymph drainage in restoring balance of ACE/ACE2 in kidney of mice / 中国病理生理杂志

AIM: To study the role of post-hemorrhagic shock mesenteric lymph (PHSML) drainage on the balance of angiotensin-converting enzyme ( ACE) and ACE2 in the kidney.METHODS:A hemorrhagic shock model was established and then fluid resuscitation was performed to the animals in shock and shock+drainage groups, and the PHMSL was drained in shock+drainage group after fluid resuscitation.After 6 h of resuscitation, the mRNA expression of ACE, ACE2, angiotensin II (Ang II) type 1 receptor (AT1R) and Mas-related G-protein-coupled receptor (MasR), and the levels of Ang II and Ang (1-7) in the renal tissues were observed.RESULTS:Hemorrhagic shock increased the levels of ACE mRNA, AT1R mRNA and Ang II, and decreased the levels of ACE2 mRNA, MasR mRNA and Ang(1-7) in the kid-ney.PHSML drainage abolished the effect of hemorrhagic shock on ACE2 and AT1R mRNA expression.Meanwhile, PHSML drainage reduced the hemorrhagic shock-induced increases in the ratios of ACE/ACE2, Ang II/Ang(1-7) and AT1R/MasR.CONCLUSION:The PHSML drainage restores the balance of ACE/ACE2, which is beneficial to alleviate acute kidney injury following hemorrhagic shock in the mice.

Practice and prospect of basic medical comprehensive experiment / 基础医学与临床

In order to meet the needs of national clinical medical education strategy, to train medical students’ability of analyzing and solving problems, it is imminent to carry out the reform on comprehensive experiment in basic medi-cal teaching.During the practice, the basic medical college of Hebei North University tried to integrate functional ex-periment and morphological experiment, and had some experience to share with medical education colleagues.

Effect of normal mesenteric lymph on multiple organ injury in mice with endotoxic shock / 中国病理生理杂志

AIM:To observe the effects of normal mesenteric lymph (NML) on the lung, heart and liver inju-ries and the phosphorylation levels of p 38 mitogen-activated protein kinase ( MAPK) , extracellular signal-regulated kinase (ERK) 1/2 and c-Jun N-terminal kinase (JNK) in the mice with endotoxic shock (ES).METHODS: The NML was drained form health male BALB/c mice for the intervention of ES after the removal of cellular constituent .Lipopolysaccha-ride (LPS, 35 mg/kg) was intraperitoneally injected into the mice for the establishment of ES model .After 60 min of LPS injection, the administration of NML (1/15 of whole blood volume) was performed through the femoral artery in NML +ES group.Meanwhile, the mean arterial pressure (MAP) was monitored during the experiment .At 6 h after intraperitoneal in-jection of LPS or the corresponding time point , blood samples were harvested from the heart through apical centesis for de-termination of the biochemical indexes to reflect myocardial and hepatocyte injuries .Simultaneously , the lung , heart and liver tissue specimens from a fixed location were harvested for the observation of histomorphology and the measurement of phosphorylation levels of p38 MAPK, ERK1/2 and JNK.RESULTS:Compared with sham shock (SS) group, MAP in ES group and NML+ES group remarkably decreased at multiple time points after intraperitoneal injection of LPS .However, MAP in NML+ES group at 80 min, 90 min, 190 min, 210 min, 240 min, 250 min, 340 min, 350 min, and 360 min were significantly increased compared with ES group .There were normal structures in the lung , liver and myocardium of the mice in SS group, while the morphological damages of these tissues appeared in ES group .Meanwhile, the damages were attenuated in the mice of NML +ES group.The activities of AST , ALT and CK-MB in the plasma in ES group were remark-ably higher than those in SS group .The CK-MB activity in NML+ES group was also increased compared with SS group , and the activities of AST and LDH-1 were lower than those in ES group .At 6 h after LPS injection , the phosphorylation levels of p38 MAPK, ERK1/2 and JNK in the lung tissues were remarkably increased .Meanwhile , no statistical difference of these indexes between the myocardial and hepatic tissues was observed .NML intervention decreased the phosphorylation levels of p38 MAPK in the lung tissues , and p38 MAPK, ERK1/2 and JNK in the myocardial tissues .CONCLUSION:The NML administration alleviates multi-organ injuries and reduces the phosphorylation level of p 38 MAPK in the lung tis-sues in the mice subjected to ES .

Role of post-hemorrhagic shock mesenteric lymph in enhancement of vas-cular permeability / 中国病理生理杂志

AIM: To investigate the role of post-hemorrhagic shock mesenteric lymph (PHSML) in the enhancementof vascular permeability .METHODS: Eighteen Wistar rats were randomized into sham group , shock group,and shock plus mesenteric lymph drainage (shock +drainage) group.The rats in shock group and shock +drainagegroup were routinely subjected to hemorrhagic shock and hypotension [(40 ±2) mmHg] was maintained for 90 min, andthen the fluid resuscitation was performed.Mesenteric lymph was drained in the rats in shock +drainage group from resuscitationfinished to 6 h, for the observation of PHSML drainage on the vascular permeability in multiple tissues of hemorrhagicshock rats.Afterwards, human umbilical vein endothelial cells (HUVECs) were incubated with the PHSML in vitro to observethe effects of PHSML on the morphology and permeability of HUVECs .RESULTS: The degree of blue color and concentrationsof Evens blue in the lung, myocardium, kidney, liver, spleen and small intestine were significantly increased inthe shocked rats than that in sham group, while the ratios of the dry weight to the wet weight were decreased .The mesentericlymph drainage reversed these changes .Meanwhile, 4% and 10% of PHSML at 0 ~3 h and 3 ~6 h after resuscitation,and lipopolysaccharide (10 mg/L) all caused the damage of HUVECs, decreased the viability and trans-endothelial electricalresistance of HUVECs, and increased the permeability of HUVECs to fluorescein isothiocyanate -labeled albumin. CONCLUSION: PHSML is a vital factor in the enhancement of vascular permeability .

Intestinal lymph drainage reduces lung tissue cell apoptosis of hemorrhagic shock rats / 中国基层医药

ObjectiveTo explore the effect of the intestinal lymph drainage on lung tissue cell apoptosis in rats with hemorrhagic shock after resuscitation,rich ALI intestinal lymphatic pathway theory.MethodsTUNEL method was used to determine the apoptosis of lung tissue cells,the brown nuclei were apoptotic cells.SABC was used to determine Bcl-2 and Bax protein expression.ResultsThe shock group and shock + drainage group lung tissue cell apoptosis rate were significantly higher than those in the sham operation group,but the shock + drainage group,the apoptosis of lung tissue cells was significantly lower than the shock group.Sham operation group showed Bcl-2,Bax protein of expression; In shock group,lung tissue cell Bcl-2 expression was significantly lower than the sham operation group,the Bax expression was significantly higher than that in the sham operation group; In shock + drainage group,lung tissue cells shored enhanced expression of Bcl-2,Bax expression was reduced,and the shock + drainage group lung tissue cell Bcl-2 expression was significantly higher than that in the shock group,the expression of Bax was significantly lower than the shock group.ConclusionThe excessive apoptosis of lung tissue cells was one of the mechanisms of lung injury after shock.Intestinal lymph drainage could reduce lung tissue cell apoptosis,the mechanism invdved the regulation of Bcl-2/Bax protein expression.

Clinical efficacy of Qingpeng ointment for the treatment of chronic eczema / 中华皮肤科杂志

ObjectiveTo evaluate the efficacy and safety of Qingpeng ointment in the treatment of chronic eczema.MethodsTotally,95 patients with chronic eczema were enrolled and divided into 3 groups to receive topical Qingpeng ointment (n =33),0.2％ hydrocortisone cream (n =32),10％ urea ointment (n =30) respectively twice a day for 4 weeks.All the patients were followed up once a week for the evaluation of therapeutic and side effects.ResultsAfter 4-week treatment,the response rate was 78.8％,84.4％ and 46.7％ in the Qingpeng ointment-,hydrocortisone cream- and urea ointment-treated patients respectively.Significant differences were observed in the response rate between the Qingpeng ointment- and urea ointment-treated patients (P ＜ 0.05 ),but not between the hydrocortisone cream- and Qingpeng ointment-treated patients (P ＞0.05).Skin flushing with a sensation of burning was observed at the application sites of 2 patients treated with Qingpeng ointment,and tingling sensation at the application sites was reported in 1 patient treated with hydrocortisone cream.All of these adverse reactions were tolerable and had no influence on the treatment.Conclusion Topical Qingpeng ointment is effective and safe for the treatment of chronic eczema.

Effects of lymph drainage on multiple organ injury of rats with traumatic hemorrhagic shock / 中华创伤杂志

Objective To observe the effect of shock lymph drainage on multiple organ injury of rats with traumatic hemorrhagic shock (THS) and discuss the relating mechanism. Methods Male Wistar rats were divided into control group, lymph drainage group and lymph return group. The THS model was established in lymph drainage group and lymph return group, when the shock mesenteric lymph was drained in lymph drainage group. The change of the mean arterial pressure ( MAP), the biochemical indices of liver, kidney, myocardium and acid-base, the morphology, ATP contents and ATPase activities of lung, kidney, liver and myocardium were observed. Results The MAP at multiple time points after 80 minutes of infusion, the ATP contents and ATPase activities of multiple organs in lymph drainage group were higher than those in lymph return group. Multiple biochemical indices in lymph drainage group were superior to those in lymph return group, with statistical difference. The inflammation, congestion, degeneration and necrosis were found in organs of lymph return group, but only mild lesions could be seen in lymph drainage group. Conclusions The shock lymph drainage can alleviate multiple organ injury of THS rats, mechanism of which is correlated with improvement of the energy metabolism and maintenance of MAP and acid-base status.

Changes of morphology and myeloperoxidase, membrane pump activities of spleen tissue in acute renal failure rabbits / 中国病理生理杂志

AIM: To observe the changes of morphology, the activity of myeloperoxidase (MPO) and membrane pump activities of spleen tissue in acute renal failure (ARF) rabbits, and to inquire into the role of spleen on pathogenesis of immune function disorders during ARF. METHODS: 42 rabbits were divided into control group, HgCl_2 group and glycerinum group. The ARF model was established by hypodermic injection of 1% HgCl_2 at dose of 1.3 mL/kg in HgCl_2 group, intramuscularly injection of 50% glycerinum at dose of 10 mL/kg in glycerinum group, respectively, and the animals were divided into the 12 h, 24 h, 48 h secondary groups (6 rabbits each group). At different time points, the rabbits were cannulated to facilitate the collection of blood sample to examine the biochemical indexes of renal function. The spleen microscopic sections were prepared for observing the morphology. The spleen homogenate was made for determining the activities of MPO and membrane pumping. RESULTS: Pathological sections of spleen showed that the different degree of congestion was found and spleen trabecula was increased in two model groups at multiple-time points. The MPO activity of spleen homogenate in HgCl_2 group and glycerinum group at all time points were obviously higher than that in control group, and at 24 h, the MPO activitie in two model groups was significantly increased than that in the same group at 12 h and 48 h. The activities of Na~+-K~+-ATPase, Ca~(2+)-ATPase, Mg~(2+)-ATPase, Ca~(2+)-Mg~(2+)-ATPase of spleen homogenate in two model groups at multiple time points were significantly lower than those in control group. Following ARF development, the ATPase activitie in two model groups at 48 h was lower than that at 12 h except the Mg~(2+)-ATPase in glycerinum group. CONCLUSION: Spleen as an immune organ has histological damage, arrest of polymorphonuclear neutrophils and dysfunction of membrane pump during the development of ARF in rabbits, leading to immune disorders.

Expression and significance of cannabinoid receptor 2 in malignant melanoma / 中华皮肤科杂志

Objective To investigate the expression of cannabinoid receptor 2 (CB2) in pigmented nevus and malignant melanoma and its significance. Methods The protein and mRNA expressions of CB2 were measured in tissue samples of 20 patients with pigmented nevus and 20 patients with malignant melanoma using immunohistochemical staining and RT-PCR, respectively. Results CB2 was expressed in both pigmented nevus and malignant melanoma. In tissue of pigmented nevus, CB2 was chiefly expressed in nevocytes and basal cell layer, and only a small quantity of CB2 was expressed in subcutaneous tissue. Statis-tical differences were observed between samples of malignant melanoma and pigmented nevus in the expres-sion intensity of CB2 (P < 0.05). Conclusions Increased protein and mRNA expressions of CB2 are observed in tissue of malignant melanoma, and the expression intensity of CB2 is higher in tissue of malig-nant melanoma than in that of pigmented nevus.

Mesenteric lymph duct ligation relives hepatic injury subjected to two-hit in rats / 基础医学与临床

Objective To explore the mechanism of mesenteric lymph duct ligation relieving hepatic injury in rats by two-hit of hemorrhage and LPS.Methods Forty-five Wistar rats were divided into three groups: ligation group,non-ligation group and sham group,and the two-hit model was established by hemorrhage and LPS,mesenteric lymph was blocked by ligating mesenteric lymph duct in ligation group.After 24 hours of operation,took out the liver for pathological section,and the hepatocellular apoptosis rate was determined by method of TUNEL,the expression of BCL-2 and BAX protein was determined by immunohistochemical test.At the same time,taking out liver for homogenate of 10 percent,the activity of MPO and ATPase and the contents of TNF-? and IL-6 were determined in hepatic homogenate.Results After two-hit,the hepatocellular apoptosis rate and expression of BAX protein in non-ligation group were significantly increased as compared with sham group and ligation group,and expression of BCL-2 protein was significantly lower.The contents of MPO,TNF-? and IL-6 in hepatic homogenate of non-ligation group were significantly increased than that of sham group,and the activity of ATPase in hepatic homogenate was significantly lower.But the ATPase in hepatic homogenate of ligation group were significantlyincreased and MPO,TNF-? and IL-6 in hepatic homogenate of ligation group were significantly lower as compared with non-ligation group.Conclusion The mechanism of mesenteric lymph duct ligation relieving hepatic injury of rats was related to the mesenteric lymph blockage reduces the TNF-? and IL-6 and improves the expression of BCL-2 protein and the activity of ATPase in liver.

Oral negative pressure in amelioration of tension headache in 20 patients with microcirculation disturbance / 中国组织工程研究

BACKGROUND: Tension headache means contraction headache or oppressive headache in bilateral occipital-cervical part or whole head. Its pathogenesy bas not been completely known yet, which may be related to many factors and the conventional therapy is drug heteropathy but the effects are different, especially on patients with chronic disease and side effects will be induced by long-time intake of drugs.OBJECTIVE: To explore the curative effect of oral negative pressure on patients with tension headache and its mechanism of ameliorating microcirculation disturbance.DESIGN: Case-control observation.SETTING: Department of Pathophysiology of Hebei North University.PARTICIPANTS: Twenty patients with tension headache in the Department of Neurology, First Affiliated Hospital of Hebei North University from December 2001 to June 2002 including 12 females and 8 males,aged 18-28 (mean 23.4) with the disease course of 1-6 years, were randomly divided into therapeutic group and control group with 10 patients in each group.METHODS: The oral negative pressure instrument was applied. Put the negative pressure exerting equipment in the optimal position of mouth, adjusted the negative pressure to (0.05±0.01) MPa. The therapeutic time was 10 minutes each time (5 minutes for the first time) once a day with the time fixed. There were 5 days in one course and totally 3 courses. Put the negative pressure exerting equipment into mouth of patients in the control group for 10 minutes each time without exerting negative pressure. Quantitative evaluation on pain was performed with visual analogue scale (VAS)method, excellent as the VAS score decreased above 70%, effective as the VAS score decreased between 30% and 70%, invalid as the VAS score decreased below 30%. XTL- Ⅱ type microcirculation micro-television system was used to observe the changes of nailfold microcirculation by magnifing 260 times. The first row nailfold of left ring figure was checked conventionally, state of microvessel, micro-bloodstream and peri-loop were recorded and degree of microcirculatory disturbance was quantitatively analyzed according to TianNiu 's weighing integral method.MAIN OUTCOME MEASURES: The therapeutic effect after three courses and results of microcirculation observation.RESULTS: Totally 20 included patients were involved in the analysis of results. VAS scores of 7 patients in the therapeutic group decreased above 70% (70%), while no patient in the control group; VAS scores of 2 patients in the therapeutic group decreased from 70% to 30% (20%) and one patient in the control group (10%); VAS scores of one patient in therapeutic group decreased below 30% (10%) and nine patie nts in the control group (90%). Negative pressure could obviously ameliorate the microcirculation disturbance and enable it to recover from moderate before treatment to nearly normal with the total score decreased from (4.18±0.68) points to (1.97±0.41) points (P ＜ 0.01).CONCLUSION:Oral negative pressure has a significant curative effect on patients with tension headache. Its mechanism may relate to the improvement of microcirculation and the adjustment of nervous functional disturbance.

Expression of PCNA in Gastric Cancer and Its Relationship with Telomerase Activity of Peritoneal Washings and Peritoneal Dissemination / 中国普外基础与临床杂志

Objective To investigate the expression of PCNA in gastric cancer and its relationship with telomerase activity of peritoneal washings and peritoneal dissemination, and to compare the efficacy of telomerase activity and cytology of peritoneal washings for prediction of peritoneal metastasis of gastric cancer. Methods Telomeric repeated amplification protocol (TRAP)-enzyme-linked immunosorbent assay (ELISA) was performed to measure the telomerase activity of peritoneal washings collected from 60 patients with gastric cancer. Exfoliate cytologic analysis of the corresponding samples was used for comparison.Expression of PCNA was measured with immunohistochemical staining.Their relationship with clinicopathologic features were evaluated. Results The positive rate of telomerase activity in peritoneal washing collected from patients with gastric cancer was 41.7%,which well related to serosal invasion, histology types, depth of infiltration and peritoneal metastasis of gastric cancer. The positive rate of telomerase activity increased with the increased depth of infiltration and serosal involvement areas (P

Protective effect of mesenteric lymph duct ligation on organ functions in MODS rats / 中国病理生理杂志

AIM: To study the protective effect of mese nt eric lymph duct ligation on the functions of liver, kidney and heart, and morpho logy in multiple organ dysfunction syndrome (MODS) rats subjected to two-hit. METHODS: Male Wistar rats were divided into three groups: the me senteric lymph duct ligation group, the non-ligation group and sham group. The M ODS model of two-hit was established by bleeding and LPS administration in both ligation group and non-ligation group. After 24 h, all rats were cannulated to f acilitate blood withdrawal for serum sample, then all rats were killed and organ s including kidney, liver, lung and heart were collected for making microscopic sectio ns. The biochemical indexes of hepatic and renal functions and myocardial enzyme in s erum were determined before and after experiment. RESULTS: After two-hit, the serum contents of AST, ALT, TBA, BUN , Cr and LDH-1 in both non-ligation group and ligation group, and UA content in non-ligation group were obviously increased than those in pre-experiment and sh am group (P

Role of intestinal lymphatic pathway in MODS pathogenesis by two-hit in rats / 中国病理生理杂志

AIM: To explore the role of intestinal lymphatic pathway in MODS pathogenesis by two-hit in rats. METHODS: Mesenteric lymph was diverted by ligating mesenteric lymph duct, and the MODS model was established by two-hit method. 45 Wistar rats were divided into three groups: mesenteric lymph duct ligation group, non-ligation group and sham group. All rats facilitated blood withdrawal for serum sample at pre-experiment and after 24 h. Then organs including kidney, liver, lung, heart and intestine were collected for preparing homogenate. The tumor necrosis factor-alpha (TNF?), nitric oxide (NO), malondialdehyde (MDA) and superoxide dismutase (SOD) were determined. RESULTS: It showed that the MODS model was established successfully. After two-hit, the TNF?, NO 2 -/NO 3 -, NOS, iNOS and MDA in serum of non-ligation group were significantly increased than that in pre-experiment and sham group, and SOD was significantly lower ( P

Effect of shock lymph on apoptosis relative gene expression in pulmonary micro-vascular endothelial cells / 中国病理生理杂志

AIM: To observe the effects of shock lymph on apoptosis relative gene expressions of pulmonary micro-vascular endothelial cells(PMVECs),and explore its mechanism.METHODS: The model of severe hemorrhagic shock was established by maintaining the blood pressure of rats in the condition of sepsis,mesentery lymph and shock portal vein blood was taken out.As control,mesentery lymph,portal vein blood of normal rats was taken out.The primary PMVECs of passages 3 were treated by different treatment factors,respectively.The apoptosis rate was analyzed by flow cytometry,and the expressions of relative genes of apoptosis such as fas,fas L,bcl-2 and bax were detected by RT-PCR.RESULTS: The apoptosis rate of PMVECs was 9.86%?3.24% after exposed to shock lymph at the final concentration of 4% for 4 hours and significantly higher than that in control(P