Polymorphism of heat shock protein 70-2 and enterocutaneous fistula in Chinese population

AIM:To investigate whether the heat shock protein 70-2(HSP70-2) polymorphism is associated with enterocutaneous fistulas in a Chinese population.METHODS:This study included 131 patients with enterocutaneous/enteroatmospheric fistulas.Patients with inflammatory bowel disease or other autoimmune diseases were excluded from this study.All patients with enterocutaneous/enteroatmospheric fistulas were followed up for three months to observe disease recurrence.In addition,a total of 140 healthy controls were also recruited from the Jinling Hospital,matched according to the sex and age of the patient population.Genomic DNA was extracted from peripheral blood from each participant.The HSP70-2 restriction fragment length polymorphism related to the polymorphic PstI site at position 1267 was characterized by polymerase chain reaction(PCR).First PCR amplification was carried out,and then PCR products were digested with PstI restriction enzyme.The DNA lacking the polymorphic PstI site within HSP70-2 generates a product of 1117 bp in size(allele A),whereas the HSP70-2 PstI polymorphism produces two fragments of 936 bp and 181 bp in size(allele B).RESULTS:The frequency of the HSP70-2 PstI polymorphism did not differ between patients and controls;however,the A allele was more predominant in patients with enterocutaneous fistulas than in controls(60.7% vs 51.4%,P = 0.038,OR = 1.425,95%CI:1.019-1.994).Sixty-one patients were cured by a definitive operation,drainage operation,or percutaneous drainage while 52 patients were cured by nonsurgical treatment.There was no significant difference in the frequency of the HSP70-2 PstI polymorphism between the patients who had surgery compared to those who did not(P = 0.437,OR = 1.237,95%CI:0.723-2.117).Moreover,11 patients refused any treatment for economic reasons or tumor burden,and 7 patients with enterocutaneous fistulas(5.8%) died during the followup period.However,there was no significant difference in the frequency of the HSP70-2 PstI polymorphism between the patients who survived compared to those who died(P = 0.403,OR = 0.604,95%CI:0.184-1.986).CONCLUSION:The A allele of the HSP70-2 PstI polymorphism was associated with enterocutaneous fistulas in this Chinese population.

超重/肥胖合并2型糖尿病患者血清ANGPTL4、HSP70、IL-34水平与胰岛素抵抗的相关性

目的 探讨超重/肥胖合并2型糖尿病(T2DM)患者血清血管生成素样蛋白4(ANGPTL4)、热休克蛋白(HSP)70、白细胞介素-34(IL-34)水平与胰岛素抵抗的相关性。方法 选取2020年5月—2022年5月保定市第一中心医院T2DM患者182例(T2DM组)。参考相关诊断标准,将T2DM患者分为超重/肥胖T2DM组(90例)和体重正常T2DM组(92例)。另选取同期健康体检者90名作为正常对照组,其中超重/肥胖者40名(超重/肥胖对照组)、体重正常者50名(体重正常对照组)。检测所有研究对象血清ANGPTL4、HSP70、IL-34、胰岛素和血糖水平,计算稳态模型胰岛素抵抗指数(HOMA-IR)。T2DM患者治疗3个月后,再次检测其血清ANGPTL4、HSP70、IL-34水平和HOMA-IR。采用Pearson相关分析评估血清ANGPTL4、HSP70、IL-34与HOMA-IR的相关性。结果 与正常对照组和体重正常T2DM组比较,超重/肥胖T2DM组血清ANGPTL4和HSP70显著降低(P<0.05),血清IL-34和HOMA-IR显著升高(P<0.05)。与正常对照组比较,体重正常T2DM组血清ANGPTL4和HSP70显著降低(P<0.05),血清IL-34和HOMA-IR显著升高(P<0.05)。Pearson相关分析结果显示,血清ANGPTL4、HSP70与HOMA-IR呈负相关(r值分别为-0.733、-0.758,P<0.001),IL-34和HOMA-IR呈正相关(r=0.705,P<0.001)。治疗后,超重/肥胖T2DM组和体重正常T2DM组血清ANGPTL4和HSP70均明显升高,血清IL-34和HOMA-IR明显降低;且相对于超重/肥胖T2DM组,体重正常T2DM组血清ANGPTL4和HSP70升高更显著(P<0.05),血清IL-34和HOMA-IR降低更显著(P<0.05)。结论 超重/肥胖合并T2DM患者ANGPTL4、HSP70和IL-34与胰岛素抵抗显著相关,或可作为超重/肥胖合并T2DM的疗效监测指标。

Heat shock protein 70-2 and tumor necrosis factor-α gene polymorphisms in Chinese children with Henoch- Schönlein purpura

Background:Henoch-Schönlein purpura(HSP)or IgAassociated vasculitis is related to immune disturbances.Polymorphisms of the heat shock protein 70-2 gene(HSP70-2)and the tumor necrosis factor-αgene(TNF-α)are known to be associated with immune diseases.The purpose of this study was to investigate the likely association of HSP70-2(+1267A/G)and TNF-α(+308A/G)gene polymorphisms with HSP in children.Methods:The polymerase chain reaction restriction fragment length polymorphism method was used to detect the HSP70-2 and TNF-αpolymorphisms in 205 cases of children with HSP and 53 controls;and the association of these polymorphisms with HSP and HSP nephritis(HSPN)was analyzed.Results:The G/G genotypic frequencies at the+1267A/G position of HSP70-2 in the HSP group(22.9%)were signifi cantly higher than those in the healthy control group(9.4%)(χ^(2)=4.764,P<0.05).The frequencies of the A/A,A/G and G/G genotypes of HSP70-2 in patients in the nephritis-free group and the HSPN group showed no statistically significant difference.The A/A genotype frequency at the+308G/A position of TNF-αin the HSP group was 8.3%,which was higher than that in the control group(χ^(2)=6.447,P<0.05).The A allele frequency of TNF-αin the HSP group was higher than that in the control group,with a statistically significant difference(χ^(2)=7.241,P<0.05).Conclusions:The HSP70-2(+1267A/G)and TNF-α(+308G/A)gene polymorphisms were associated with HSP in children.The G/G homozygosity of HSP70-2 and the A/A homozygosity of TNF-αmay be genetic predisposing factors for HSP.

慈苓化浊方对痛风大鼠滑膜组织环氧化酶-2、热休克蛋白70表达的影响

目的:分析慈苓化浊方对痛风大鼠滑膜组织中环氧化酶-2(COX-2)、热休克蛋白70(HSP70)表达的影响。方法:选取50只SPF级SD大鼠,10只大鼠作为对照组,另外40只建立痛风模型,将30只建模成功的大鼠分为模型组、药物对照组、慈苓化浊方组,每组10只。观察各组大鼠组织病理学、关节肿胀度、COX-2、HSP70表达、炎症因子、磷脂酰肌醇3-激酶(PI3K)/蛋白激酶B(AKT)/叉头框转录因子O亚族1(FoxO1)通路相关因子及其mRNA表达量。结果:与对照组相比,模型组、药物对照组、慈苓化浊方组关节肿胀度、COX-2、肿瘤坏死因子-α(TNF-α)、白介素-1β(IL-1β)、白介素-6(IL-6)、PI3K mRNA、AKT mRNA、FoxO1 mRNA表达量升高,HSP70 mRNA、Caspase-3 mRNA表达量降低(均P<0.05)。与模型组相比,药物对照组、慈苓化浊方组关节肿胀度、COX-2、TNF-α、IL-1β、IL-6、PI3K mRNA、AKT mRNA、FoxO1 mRNA表达量降低,HSP70 mRNA、Caspase-3 mRNA表达量升高(均P<0.05)。与药物对照组相比,慈苓化浊方组关节肿胀度、COX-2、TNF-α、IL-1β、IL-6、PI3K mRNA、AKT mRNA、FoxO1 mRNA表达量降低,HSP70 mRNA、Caspase-3 mRNA表达量升高(均P<0.05)。结论:采用慈苓化浊方干预痛风大鼠,可降低大鼠关节肿胀程度,降低滑膜组织COX-2、HSP70表达,抑制炎症反应,其作用机制可能与抑制PI3K/AKT/FoxO1通路有关。

Influence of Tanshinone lla on heat shock protein 70,Bcl-2 and Bax expression in rats with spinal ischemia/reperfusion injury

Tanshinone lla is an effective monomer component of Danshen, which is a traditional Chinese medicine for activating blood circulation to dissipate blood stasis. Tanshinone Ila can effectively improve brain tissue ischemia/hypoxia injury. The present study established a rat model of spinal cord ischemia/reperfusion injury and intraperitoneally injected Tanshinone lla, 0.5 hour prior to model establishment. Results showed that Tanshinone Ila promoted heat shock protein 70 and Bcl-2 protein expression, but inhibited Bax protein expression in the injured spinal cord after ischemia/reperfusion injury. Furthermore, Nissl staining indicated a reduction in nerve cell apoptosis and fewer pathological lesions in the presence of Tanshinone Ila, compared with positive control Danshen injection.

Expression of Heat Shock Protein 70 and 27 in Non-small Cell Lung Cancer and Its Clinical Significance

The heat shock proteins （HSPs） 70 and HSP 27 expression in patients with non-small cell lung cancer （NSCLC） was studied and the relation.ship between HSP 70 and HSP 27 with the clinicopathological features of NSCLC was investigated. The expression of HSP 70 and HSP 27 was detected in tumor tissues from 60 patients with NSCLC by S-P immunohistochemistry. The findings were analyzed in combination with the histological types, histopathological differentiation, lymph node metastasis, patients＇ clinical stages, smoking history and gender. The results showed that of the 60 NSCLC tissue specimens studied, the immunoreactivity of HSP 70 and HSP 27 was detected in 47 （78.3 %） and 43 （71.7 %） specimens, respectively. A positive correlation was found between the overexpression of HSP 70 and HSP 27. The histopathological differentiation, lymph node metastasis, clinical stages and smoking history were correlated to the expression of HSP 70, but not to the expression of HSP 27. No statistical significance was observed in histological types and gender with respect to both HSP 70 and HSP 27 expression. It is suggested that the HSP 70 expression is a powerful and significant prognostic indicator and is related to histopathological differentiation, lymph node metastasis, patients＇ clinical stages, smoking history, whereas HSP 27 expression is not.

Co-expression of heat shock protein 70 and glucose-regulated protein 94 in human gastric carcinoma cell line BGC-823

AIM: To investigate the co-expression and significance of heat shock protein 70 (HSP70) and glucose-regulatedprotein 94 (grp94) in human gastric carcinoma cell line BGC-823.METHODS: The expression and localization of HSP70 and grp94 in human gastric carcinoma cell line BGC-823 were determined by immunocytochemistry and indirect immunofiuorescence cytochemical staining. Flow cytometry was used to analyze the correlation between expression of HSP70, grpg4 and cell cycle in BGC-823 cell line.RESULTS: Gastric cancer cell line BGC-823 expressed high level of HSP70 and grp94. The positive rate of HSP70 and grp94 was 84.9±4.94% and 79.6±5.16%, respectively. Bothof them were stained in cell plasma. There was a significant difference compared with control group (1.9±0.94%,P＜0.01). During the cell cycle, HSP70 and grp94 were continuously expressed in BGC-823.CONCLUSION: HSP70 and grp94 are highly expressed in human gastric carcinoma BGC-823 cells through the whole cell cycle. There is no relationship between expression of HSP70, grp94 and cell cycle.

Heat shock protein 70 chaperoned alpha-fetoprotein in human hepatocellular carcinoma cell line BEL-7402

AIM: To investigate the interaction between heat shock protein 70 (HSP70) and α-fetoprotein (AFP) in human hepatocellular carcinoma (HCC) cell line BEL7402.METHODS: The expression and localization of HSP70 and AFP in human HCC cell line BEL-7402 were determined by immunocytochemistry and indirect immunofluorescence cytochemical staining. The interaction between HSP70 and AFP in HCC cells was analyzed by immunoprecipitation and Western blot.RESULTS: Immunocytochemical staining detection showed that HCC cell BEL-7402 expressed a high level of HSP70 and AFP synchronously. Both were stained in cell plasma.AFP existed in the immunoprecipitate of anti-HSP70 mAb,while there was HSP70 in the immunoprecipitate of antiAFP mAb.CONCLUSION: HSP70 chaperones AFP in human HCCcell BEL-7402. The interaction between HSP70 and AFP in human HCC cell can be a new route to study the pathogenesis and immunotherapy of HCC.

Glutamine supplementation attenuates intestinal apoptosis by inducing heat shock protein 70 in heatstroke rats

BACKGROUND:Heatstroke is the most hazardous heat-related illness and has a high fatality rate.We investigated whether glutamine supplementation could have a protective effect on heatstroke rats.METHODS:Twenty-five 12-week-old male Wistar rats(weight 305±16 g)were randomly divided into a control group(n=5),heatstroke(HS)group(n=10),and heatstroke+glutamine(HSG)group(n=10).Seven days before heat exposure,glutamine(0.4 g/[kg·d])was administered to the rats in the HSG group by gavage every day.Three hours after heat exposure,serum samples were collected to detect white blood cells,coagulation indicators,blood biochemical indicators,and inflammatory cytokines in the rats.The small intestine tissue was stained to analyze pathological structural changes and apoptosis.Finally,immunohistochemistry and Western blotting were used to analyze the expression levels of heat shock protein 70(HSP70).Multiple comparisons were analyzed by using one-way analysis of variance,and the Bonferroni test was conducted for the post hoc comparisons.RESULTS:After heat exposure,the core temperature of the HS group(40.65±0.31°C)was higher than the criterion of heatstroke,whereas the core temperature of the HSG group(39.45±0.14°C)was lower than the criterion.Glutamine supplementation restored the increased white blood cells,coagulation indicators,blood biochemical indicators,and inflammatory cytokines that were induced by heatstroke to normal levels.The intestinal mucosa was injured,and the structure of tight junctions was damaged in the HS group;however,the structure of intestinal mucosal epithelial cells was stable in the HSG group.Glutamine supplementation alleviated intestinal apoptosis and up-regulated HSP70 expression.CONCLUSION:Glutamine supplementation may alleviate intestinal apoptosis by inducing the expression of HSP70 and have a protective effect on heatstroke rats.

Abrogation of heat-shock protein (HSP)70 expression induced cell growth inhibition and apoptosis in human androgen-independent prostate cancer cell line PC-3m

Aim: To investigate the effect of abrogating heat shock protein (HSP) 70 expression by antisense HSP70 oligonucleotides treatment on human androgen-independent prostate cancer cell line PC-3m growth. Methods: PC-3m cells were treated with 0-16 μmol/L antisense HSP70 oligomers for 0-100 hr. Cell growth inhibition was analyzed using a trypan blue dye exclusion test. Apoptotic cells were detected and confirmed by flow cytometric analysis and DNA fragmentation analysis. The protein expression of HSP70 and bcl-2 affected by antisense HSP70 oligomers were determined using Western blot. Results: Antisense HSP70 oligomer induced apoptosis and then inhibited proliferation of PC-3m cells in a dose- and time-dependent manner. Ladder-like patterns of DNA fragments were observed in PC-3m cells treated with 10 μmol/L antisense HSP70 oligomer for 48 hr or 8 μmol/L for 72 hr on agarose gel electrophoresis. Antisense HSP70 oligomer pretreatment enhanced the subsequent induction of apoptosis by heat shock in PC-3m cells. In addition, undetectable HSP70 expression was observed at a concentration of 10 μmol/L antisense HSP70 oligomer treatment for 48 hr or 8 μmol/L for 72 hr in Western blot, which was paralleled by decreased expression levels of anti-apoptotic protein bcl-2. Conclusion: HSP70 antisense oligomer treatment abrogates the expression of HSP70, which may disrupt HSP70-bcl-2-interactions and further down-regulate bcl-2 expression, in turn inducing apoptosis and inhibiting cell growth in PC-3m cells.

Radiofrequency ablation,heat shock protein 70 and potential anti-tumor immunity in hepatic and pancreatic cancers:a minireview

BACKGROUND: Radiofrequency ablation (RFA) is a minimally invasive surgical procedure which has widespread popularity in the treatment of hepatic and pancreatic cancers. Increased evidence indicates that RFA stimulates anti-tumor immunity, possibly through the induction heat shock protein 70 (HSP70) expression. HSP70 has the capacity to affect the immunogenicity of tumor cells, to chaperone antigenic peptides and deliver these into antigen presentation pathways within antigen-presenting cells, and to activate and regulate innate and adaptive immunity, which makes it useful in immunotherapeutic strategies for the treatment of cancers. DATA SOURCES: An English-language literature search was conducted using MEDLINE (1991-2010) on anti-tumor immunity, heat shock protein 70, radiofrequency ablation, hepatic cancer, pancreatic cancer, and other related subjects. RESULTS: RFA has an increasing application in the surgical treatment of hepatic and pancreatic cancers. Increased evidence indicates that RFA can induce the expression of HSP70 which possesses properties that enable it to influence a variety of immunological processes. Tumor-derived HSP70 is regarded as a potent adjuvant facilitating presentation of tumor antigens and induction of anti-tumor immunity. CONCLUSIONS: This review addresses the potential association of RFA, HSP70, and anti-tumor immunity in treatment of hepatic and pancreatic cancers. To establish direct evidence of a potential association of RFA, HSP70, and anti-tumor immunity in hepatic and pancreatic cancers, further investigations should be conducted.

Expression and significance of heat shock protein 70 and glucose-regulated protein 94 in human esophageal carcinoma

AIM: To investigate the expression and significance of heat shock protein 70 (HSP70) and glucose-regulated protein 94 (grp94) in human esophageal carcinoma and adjacent normal tissues.METHODS: The expression of HSP70 and grp94 in 78human esophageal cancer and adjacent normal tissues was studied by immunohistochemistry and pathology photograph analysis.RESULTS: Both esophageal cancer and adjacent normal tissues could express HSP70 and grp94. Of the 78 cases of esophageal carcinoma, 95.0%(72/78) showed positive HSP70, mainly stained in nuclei, while grp94 was mainly stained in cell plasma, and the positive rate was 71.8%(56/78).There was a significant difference in the expression of HSP70 and grp94 between esophageal cancer and adjacent normal tissues (P＜0.01). Compared with adjacent normal tissues, there was a significant difference between differential types and HSP70 expression (P＜0.01).CONCLUSION: HSP70 and grp94 express differently in cell plasma and nuclei. The expression intensity of HSP70is related to the differentiation of esophageal carcinoma.

Correlation between clinicopathology and expression of heat shock protein 70 and glucose-regulated protein 94 in human colonic adenocarcinoma

AIM: To investigate the correlation between dinicopathology and expression of heat shock protein 70 (HSP70) and glucose-regulated protein 94 (grp94) in human colonic carcinoma.METHODS: The expression of HSP70 and grp94 was studied in 80 human colonic cancers with or without metastasis as well as in their adjacent mucous membrane by way of immunohistochemistry and pathology photograph analysis.RESULTS: The expression of HSP70 and grp94 was significantly higher in cancer than that in adjacent mucous membrane (92.5%, 85.0% vs 56.3%, 42.5%, P＜0.01).HSP70 and grp94 expressed higher in moderately- and poorly-differentiated colonic cancers than that in their adjacent tissues (93.7%, 87.5%; 100%, 90% vs 56.3%,42.5%; P＜0.01). Dukes C and D stages of colonic cancers showed higher positive rates than Dukes A and B stage groups (97.1%, 91.2%; 100%, 90.9%; vs 80%, 70%;78.6%, 71.4%; P＜0.05). There were definite differences in HSP70 and grp94 expression between metastasis groups and non-metastasis groups (100% vs75%, 100%vs 50%, P＜0.05).CONCLUSION: The HSP70 and grp94 expression rates in colonic cancer groups are significantly higher than that in their adjacent mucous membrane. The HSP70 and grp94expression in poorly-differentiated colonic cancers with metastasis is significantly higher than well-differentiated cancers without metastasis. The overexpression of HSP70and grp94 can be used as diagnostic or prognostic markers for colonic cancer.

Heat shock protein 70 antisense oligonucleotide inhibits cell growth and induces apoptosis in human gastric cancer cell line SGC-7901

AIM: Heat shock protein (HSP)70 is over-expressed in human gastric cancer and plays an important role in the progression of this cancer. We investigated the effects of antisense HSP70 oligomer on human gastric cancer cell line SGC-7901, and its potential role in gene therapy for this cancer.METHODS: Human gastric cancer cell line SGC-7901 was treated in vitro with various concentrations of antisense HSP70 oligonucleotides at different intervals. Growth inhibition was determined as percentage by trypan blue dye exclusion test. Extracted DNA was electrophoresed on agarose gel, and distribution of cell cycle and kinetics of apoptosis induction were analyzed by propidium iodide DNA incorporation using flow cytometry, which was also used to detect the effects of antisense oligomer pretreatment on the subsequent apoptosis induced by heat shock in SGC-7901 cells. Proteins were extracted for simultaneous measurement of HSP70 expression level by SDS-PAGE Western blotting.RESULTS: The number of viable cells decreased in a doseand time-dependent manner, and ladder-like patterns of DNA fragments were observed in SGC-7901 cells treated with antisense HSP70 oligomers at a concentration of 10 μmol/L for 48 h or 8 μmol/L for 72 h, which were consistent with inter-nucleosomal DNA fragmentation. Flow cytometric analysis showed a dose- and time-dependent increase in apoptotic rate by HSP70 antisense oligomers. This response was accompanied with a decrease in the percentage of cells in the G1 and S phases of the cell cycle, suggesting inhibition of cell proliferation. In addition, flow cytometry also showed that pretreatment of SGC-7901 cells with HSP70 antisense oligomers enhanced the subsequent apoptosis induced by heat shock treatment. Western blotting demonstrated that HSP70 antisense oligomers inhibited HSP70 expression, which preceded apoptosis, and HSP70 was undetectable at the concentration of 10 μmol/L for 48 h or 8 μmol/L for 72 h.CONCLUSION: Antisense HSP70 oligomers can abrogate HSP70 expression in SGC-7901 cells, which may in turn induce apoptosis and inhibit cell proliferation, conversely suggesting that HSP70 is required for the proliferation and survival of human gastric cancer cells under normal conditions.

Ischemic preconditioning inhibits development of edematous cerulein-induced pancreatitis: Involvement of cyclooxygenases and heat shock protein 70

AIM: To determine whether ischemic preconditioning (IP)affects the development of edematous cerulein-induced pancreatitis and to assess the role of cyclooxygenase-1 (COX-1), COX-2, and heat shock protein 70 (HSP 70) in this process.METHODS: In male Wistar rats, IP was performed by damping of celiac artery (twice for 5 min at 5-min intervals).Thirty minutes after IP or sham operation, acute pancreatitis was induced by cerulein. Activity of COX-1 or COX-2 was inhibited by resveratrol or rofecoxib, respectively (10 mg/kg).RESULTS: IP significantly reduced pancreatic damage in cerulein-induced pancreatitis as demonstrated by the improvement of pancreas histology, reduction in serum lipase and poly-C ribonuclease activity, and serum concentration of pro-inflammatory interleukin (IL)-1β.Also, IP attenuated the pancreatitis-evoked fall in pancreatic blood flow and pancreatic DNA synthesis.Serum level of anti-inflammatory IL-10 was not affected by IP. Cerulein-induced pancreatitis and IP increased the content of HSP 70 in the pancreas. Maximal increase in HSP 70 was observed when IP was combined with cerulein-induced pancreatitis. Inhibition of COXs, especially COX-2, reduced the protective effect of IP in edematous pancreatitis.CONCLUSION: Our results indicate that IP reduces pancreatic damage in cerulein-induced pancreatitis and this effect, at least in part, depends on the activity of COXs and pancreatic production of HSP 70.

Effects of moxibustion on heat-shock protein 70 expression in the spinal cord and colonic mucosa in a rat model of ulcerative colitis

Pathological changes in the colon are closely associated with the spinal cord, and innervation of spinal cord can regulate cellular functions. Our previous studies verified that moxibustion protects and restores the colonic mucosa, but the mechanisms of action remain unknown. The present study observed the effects of moxibustion and salicylazosulfapyridine on expression of heat-shock protein 70 （HSP70） and its mRNA in the spinal cord and colonic mucosa of ulcerative colitis rats. Results demonstrated that moxibustion and salicylazosulfapyridine increased HSP70 mRNA expression in the spinal cord and colonic mucosa of ulcerative colitis rats. The decreased transcriptional activity of HSP70 in the spinal cord and colonic mucosa might participate in damage to the colonic mucosa in ulcerative colitis rats. Moxibustion exerted protective effects on colonic mucosa by up-regulating HSP70 transcriptional activity in the spinal cord and colonic mucosa.

EXPERIMENTAL STUDY ON MOXIBUSTION AT ZUSANLI(ST 36) AND LIANGMEN (ST 21) INDUCING HEAT SHOCK PROTEIN 70 (HSP70) EXPRESSION TO RESIST OXIDATIVE INJURY OF GASTRIC MUCOSA

Objective: To observe effect of moxibustion at Zusanli (足三里 ST 36) and Liangmen (梁门 ST 21) on expression of heat shock protein 70 (HSP70) in gastric mucosa of the rat of stress ulcer (SU) to explore the mechanism of moxibustion in resisting oxidative injury of the gastric mucosa. Methods: Sixty SD rats were evenly randomized into 4 groups, a blank group, a model group, an acupoint moxibustion group and a non-acupoint moxibustion group. Water restraint stress (WRS) method was used to make stress gastric ulcer rat model. The ulcerative index (UI) of gastric mucosa was evaluated by using GUTH method, the gastric mucosa blood flux (GMBF) was detected by a laser Doppler bloodflow monitor, and HSP70 expression and malondialdehyde (MDA) content in the gastric mucosa were determined respectively with immunohistochemical and thiobarbiturate methods. Results: Moxibustion at Zusanli (ST 36) and Liangmen (ST 21) significantly decreased UI, up-regulated HSP70 expression, increased GMBF, and decreased MDA content in the gastric mucosa in the rat of stress gastric ulcer, with significant differences as compared with the model group and the non-acupoint moxibustion group (P<0.05 or P<0.01). Conclusion: Moxibustion at Zusanli (ST 36) and Liangmen (ST 21) can induce high expression of HSP70 and decrease MDA content in the gastric mucosa, so as to resist oxidative injury, with relative acupoint specificity.

Effect of electro-acupuncture on the expression of heat shock protein-70 gene in rat spinal cords following spinal cord injury

BACKGROUND： It is generally believed that the mechanism by which heat shock protein-70 （HSP70） protects cells is related to its effectiveness in maintaining the normal stereochemical structure of intracellular proteins, and in participating in the process of cell apoptosis. Whether electro-acupuncture participates in HSP70 expression and produces neuroprotective effects remain unclear. OBJECTIVE： This study aimed at detecting HSP70 expression after electro-acupuncture in rats with transected spinal cord, in order to further validate the mechanism of electro-acupuncture-induced effects in the treatment of spinal cord injury. DESIGN： A controlled observational experiment. SETTING： Shanghai University of Traditional Chinese Medicine and Toho University, School of Medicine. MATERIALS： Seventy adult male Sprague-Dawley rats of SPF grade, weighing 200± 20 g, were provided by the Laboratory Animal Center of Shanghai University of Traditional Chinese Medicine, with permission No. SYXK （hu） 2004 - 2005. The animals were handled in accordance with the requests from Animal Ethics Committees for guidance. A G6805-2 multiple purpose treatment machine was used （Shanghai Medical Instruments High-Tech Co.,Ltd., Shanghai, China）. METHODS： This study was carried out in the state level laboratories of Shanghai University of Traditional Chinese Medicine and Toho University, School of Medicine between January 2005 and July 2007. The rats were randomly divided into the electro-acupuncture treated group, which received electro-acupuncture treatment in addition to spinal cord surgery and the control group, which received only spinal cord surgery, with 35 rats in each group. All the rats underwent the same surgery consisting of spinal cord transection at the T10 level. If the spinal cord was completely transected and the two posterior limbs were completely paralyzed, then the surgery was considered successful and the animal was kept for further analysis and testing. After surgery, rats in the experimental group were electro-acupunctured with a G6805-2 multiple purpose treatment machine. Two needle electrodes were inserted under the T7 and T10 spinal processes, The treatment was administered once a day for 20 minutes. Rats in the control group were not given any treatment after surgery. Five rats were sacrificed separately in each group on days 1, 2, 3, 7, 14, 21 and 28 after surgery. HSP70 gene expression at the site of lesion was located and quantitatively analyzed by immunohistochemistry and real-time PCR methods. Simultaneously, the spinal cord injury region and neurons were observed by HE and Klüver-Barrera stainings. MAIN OUTCOME MEASURES： （1）HSP70 gene expression in the spinal cord injury region. （2） The number of neurons in the spinal cord injury region. RESULTS： Seventy rats were involved in the final analysis. （1）At the end of each pre-determined block of time, HSP70 mRNA level in the spinal cord injury region of rats in the electro-acupuncture treated group was significantly higher than that in the control group （P 〈 0.05）. HSP70 gene expression in the two groups reached peak levels on day 2 after surgery. （2） On days 7, 14, 21 and 28 after surgery, the number of neurons in the spinal cord injury region in the electro-acupuncture treated group was significantly higher than that in the control group （P 〈 0.05）. CONCLUSION： Electro-acupuncture can effectively enhance HSP70 expression in the spinal cord injury region. HSP70 may participate in this apparent neuroprotective effect.

G-17、SOX-2、HSP70在Hp感染胃炎中的表达及意义

目的 探讨胃泌素17(gastrin-17,G-17)、性别决定区Y框蛋白2(sex-determining region Y box protein-2,SOX-2)、热休克蛋白70(heat shock protein 70,HSP70)在幽门螺杆菌(helicobacter pylori, Hp)感染胃炎中的表达及意义。方法 选取慢性胃炎患者90例,根据是否合并Hp感染将其分为Hp阳性组和Hp阴性组,每组45例。比较2组一般资料,G-17、HSP70水平及SOX-2、HSP70表达情况。分析Hp阳性患者G-17、SOX-2、HSP70与各指标的相关性;多因素Logistic回归分析影响Hp感染胃炎的危险因素。结果 Hp阳性组共餐饮食方式比例、临床症状积分高于Hp阴性组,胃蛋白酶原Ⅰ(pepsinogenⅠ,PG-Ⅰ)、胃蛋白酶原Ⅱ(pepsinogenⅡ,PG-Ⅱ)水平低于Hp阴性组(P<0.05)。Hp阳性组G-17水平低于Hp阴性组,HSP70水平及SOX-2阳性、HSP70阳性表达率高于Hp阴性组(P<0.05)。Hp阳性患者中,G-17与PG-Ⅰ、PG-Ⅱ呈正相关,与临床症状积分呈负相关,SOX-2、HSP70与PG-Ⅰ、PG-Ⅱ呈负相关,与临床症状积分呈正相关(P<0.05)。Logistic回归分析结果显示,饮食方式、PG-Ⅱ、G-17、SOX-2、HSP70是影响Hp感染胃炎患者的危险因素(P<0.05)。结论 G-17在Hp感染胃炎患者中水平较低,SOX-2、HSP70阳性表达较高,饮食方式、PG-Ⅱ、G-17、SOX-2、HSP70是影响Hp感染胃炎患者的危险因素。