Effect of Ultraviolet Radiation on Hsp70 Protein Expression in HaCaT Cells

Ultraviolet radiation by its wavelength is divided into: UVA, UVB and UVC. Only UVA and UVB manage to penetrate the ozone layer, but due to anthropological activities, all of them are capable of interacting with humans to a greater or lesser extent, and can generate adverse effects such as cellular stress when interacting with intra-and extracellular biomolecules. The skin is the first organ in contact with UV radiation, and the stress it generates can be analyzed by the expression of a bioindicator of cellular damage such as Hsp70. Therefore, the objective of the project was: to determine the effect of UVA, UVB and UVC radiation on HaCaT epithelial cells, by analyzing the expression of Hsp70. Materials and methods: HaCaT cells were cultured in vitro, which were irradiated with UVA, UVB and UVC light at different doses, to subsequently determine the degree of Hsp70 expression by Immunodetection by PAGE-SDS and Western Blot. Results: Basal expression of Hsp70 was observed in no irradiated HaCaT cells. When HaCaT cells were irradiated with UVA, UVB, UVC, an increase in this Hsp70 protein was observed. With UVA, a higher degree of expression was observed at a time of 30 minutes of irradiation. With UVB the highest expression shifted to a time of 20 minutes. With UVC, overexpression was observed after 10 minutes. Conclusion: UV radiation generates cellular stress on HaCaT cells, evaluated by the stress bioindicator Hsp70. According to the wavelength of UV radiation, those that have a shorter wavelength have a greater potential for cellular damage, such as UVC.

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。

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.

老年重症急性胰腺炎继发胰腺感染的病原菌分布及其与血清PCT、PA、FIB、HSP70和HMGB1的相关性

目的探讨老年重症急性胰腺炎继发胰腺感染患者的病原菌分布及其与血清降钙素原(PCT)、前白蛋白(PA)、纤维蛋白原(FIB)、热休克蛋白70(HSP70)、高迁徙率族蛋白1(HMGB1)水平的相关性。方法选择2019年1月至2022年12月东莞东华医院收治的62例老年重症急性胰腺炎患者作为研究对象,根据是否继发胰腺感染分为感染组20例和未感染组42例,另选择同期健康体检的80例健康者作为对照组。记录感染组患者病原菌分布情况,比较三组受试者及感染组不同病原菌感染类型患者的血清PCT、PA、FIB、HSP70和HMGB1水平,并采用Pearson相关性分析法分析血清PCT、PA、FIB、HSP70及HMGB1水平和胰腺感染的相关性。结果感染组患者病原菌感染类型主要为细菌感染,占90.00%,其中细菌感染类型中革兰阴性菌占55.00%,革兰阳性菌占35.00%;感染组患者血清PCT、HSP70、HMGB1水平分别为(2.49±0.53)μg/L、(9.12±1.86)ng/mL、(18.33±2.61)ng/mL,明显高于未感染组的(1.56±0.41)μg/L、(5.73±1.45)ng/mL、(13.62±2.47)ng/mL和对照组的(0.23±0.06)μg/L、(0.97±0.13)ng/mL、(0.73±0.15)ng/mL,PA、FIB分别为(0.17±0.02)g/L、(2.06±0.21)g/L,明显低于未感染组的(0.23±0.04)g/L、(2.75±0.30)g/L和对照组的(0.30±0.03)g/L、(3.23±0.36)g/L,且未感染组患者的血清PCT、HSP70、HMGB1水平均高于对照组,PA、FIB均低于对照组,差异均有统计学意义(P<0.05);感染组细菌感染患者的血清PCT、HSP70、HMGB1水平分别为(2.74±0.31)μg/L、(11.06±1.43)ng/mL、(20.68±2.05)ng/mL,明显高于真菌感染患者的(2.13±0.25)μg/L、(7.93±1.05)ng/mL、(16.27±1.76)ng/mL,PA、FIB水平分别为(0.11±0.02)g/L、(1.91±0.24)g/L,明显低于真菌感染患者的(0.17±0.04)g/L、(2.58±0.34)g/L,差异均有统计学意义(P<0.05);经Pearson相关性分析结果显示,血清PCT、HSP70、HMGB1与胰腺感染呈正相关(r=0.581、0.613、0.567,P<0.05),与PA、FIB呈负相关(r=-0.463、-0.531,P<0.05)。结论老年重症急性胰腺炎继发胰腺感染患者的病原菌类型主要为细菌感染,患者血清PCT、HSP70、HMGB1水平明显升高,PA、FIB明显降低,且与胰腺感染的发生有明显相关性,临床上应予以密切关注。

血清CF-6、HSP-70表达对慢性心力衰竭患者病情及预后的评估价值

目的探究血清线粒体偶联因子-6(CF-6)、热休克蛋白70(HSP-70)表达对慢性心力衰竭(CHF)患者病情及预后的评估价值。方法选取2020年12月至2021年12月我院收治的CHF患者106例(CHF组),根据美国纽约心脏病协会(NYHA)心功能分级标准分为:NYHAⅡ级36例(Ⅱ级组),NYHAⅢ级38例(Ⅲ级组),NYHAⅣ级32例(Ⅳ级组);根据预后情况分为预后良好组54例,预后不良组52例;选择同期我院体检健康的106例志愿者为对照组。采用酶联免疫吸附测定(ELISA)法检测血清中CF-6、HSP-70的表达水平;多因素Logistic回归分析影响CHF预后的危险因素;受试者工作特征(ROC)曲线分析血清中CF-6、HSP-70对CHF预后的评估价值。结果与对照组相比,CHF组血清中CF-6、HSP-70表达水平显著升高(P<0.05)。CHF患者Ⅳ级组血清CF-6、HSP-70表达水平显著高于Ⅱ级组和Ⅲ级组,Ⅲ级组表达水平显著高于Ⅱ级组(P<0.05)。与预后良好组相比,预后不良组CF-6、HSP-70水平显著升高(P<0.05)。预后不良组血肌酐水平显著高于预后良好组(P<0.05)。多因素Logistic回归分析显示,CF-6、HSP-70、血肌酐表达水平是影响CHF预后的危险因素;ROC分析显示,血清CF-6、HSP-70水平联合预测CHF预后的AUC高于CF-6、HSP-70单独预测的AUC值(P<0.05)。结论CHF患者血清CF-6、HSP-70表达水平显著升高,并随着病情加重而升高,二者对CHF患者的预后评估有一定的临床价值。

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.

春尺蠖热激蛋白AcinHsp70基因的克隆、分子特性与表达分析

【目的】克隆春尺蠖热激蛋白Hsp70基因,分析其理化性质与表达情况,探究该基因在春尺蠖应对外界不利环境中的作用。【方法】基于前期所测转录组数据(春尺蠖幼虫不同低温胁迫),克隆获取Hsp70基因,命名为AcinHsp70(GenBank登录号:OP750249);利用生物信息分析软件对Hsp70基因的理化性质进行分析;采用qPCR技术检测AcinHsp70基因在不同温度(-10、-5、0、5和25℃)胁迫中回温与不回温及4℃不同时间处理下的表达谱。【结果】春尺蠖AcinHsp70基因完整CDS序列全长1899 bp,编码633个氨基酸,蛋白质预测分子量为69.91 kDa,预测等电点为5.51。在N端均不含信号肽且无跨膜区。磷酸位点检测分别发现丝氨酸、苏氨酸和酪氨酸磷酸位点24、26和8个;未发现糖基化位点。该蛋白的平均亲水性为-0.507,预测不稳定系数为33.19,故该蛋白属于亲水稳定蛋白,亚细胞定位结果显示,其主要位于细胞质。序列一致性比对与系统进化树分析结果显示,春尺蠖与庆网蛱蝶(Melitaea cinxia)亲缘关系最近,序列一致性达92.91%。基因表达结果显示,不同温度(-10℃除外)胁迫下,AcinHsp70基因表达量均无明显差异,回温后表达量显著上调。AcinHsp70基因表达量总体呈先升后降趋势,在4℃处理1 h后表达量达到最大值。【结论】AcinHsp70基因与春尺蠖应对低温胁迫的响应密切相关,结果有助于揭示该基因在低温胁迫下的分子功能。

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.

血清ANXA1、Hsp70、Hsp90α与局部晚期宫颈癌患者新辅助化疗疗效的关系分析

目的探讨血清膜联蛋白A1(ANXA1)、热休克蛋白70(Hsp70)、热休克蛋白90α(Hsp90α)与局部晚期宫颈癌(LACC)患者新辅助化疗(NACT)疗效的关系。方法选择2020年1月至2023年1月在该院进行NACT治疗的157例LACC患者为研究对象,根据NACT疗效分为有效组和无效组。比较两组化疗前血清ANXA1、Hsp70、Hsp90α水平,采用多因素Logistics回归分析NACT疗效的影响因素,采用受试者工作特征(ROC)曲线分析血清ANXA1、Hsp70、Hsp90α对LACC患者NACT无效的预测价值。结果有效组(126例)血清ANXA1水平高于无效组(31例),血清Hsp70、Hsp90α水平低于无效组,差异有统计学意义(P<0.05)。单因素分析显示,有效组国际妇产科联盟大会(FIGO)分期为ⅡA2期患者占比、低/未分化患者占比、有淋巴结转移患者占比,以及化疗前CA125、CA199水平低于无效组,差异有统计学意义(P<0.05)。多因素Logistic回归分析显示,血清Hsp70水平升高、血清Hsp90α水平升高、FIGO分期为ⅡA2期和CA199水平升高是影响LACC患者NACT疗效的独立危险因素(P<0.05),ANXA1水平升高是保护因素(P<0.05)。血清ANXA1、Hsp70、Hsp90α及3项指标联合检测预测LACC患者NACT无效的曲线下面积(AUC)分别为0.836、0.789、0.717和0.941。结论血清ANXA1、Hsp70、Hsp90α与LACC患者NACT疗效有关,3项指标联合检测对LACC患者NACT疗效具有较高的预测价值。

血清HSP70、PKD1、YKL-40对绝经后早期子宫内膜癌淋巴结转移的预测效能

目的:探讨血清热休克蛋白70(HSP70)、蛋白激酶D1(PKD1)、甲壳质酶蛋白40(YKL-40)与绝经后早期子宫内膜癌淋巴结转移的关系及预测效能。方法:选取2021年3月至2023年3月中国人民解放军联勤保障部队第九八〇医院收治的126例绝经后早期子宫内膜癌患者(研究组),根据术后病理诊断结果分为淋巴结转移组(n=22)和非淋巴结转移组(n=104)。另选取114例健康体检者作为对照组。比较各组血清HSP70、PKD1和YKL-40水平。采用多因素logistic回归分析方法分析影响患者发生淋巴结转移的因素,受试者工作特征(ROC)曲线分析血清HSP70、PKD1和YKL-40水平对患者淋巴结转移的预测价值。结果:研究组血清HSP70、PKD1和YKL-40水平均高于对照组(P<0.05)。淋巴结转移组患者低分化、子宫肌层浸润≥50%及血清CA125、HE4、HSP70、PKD1和YKL-40水平高于非淋巴结转移组(P<0.05)。多因素logistic回归分析显示,血清HE4、HSP70、PKD1和YKL-40水平及子宫肌层浸润≥50%均为绝经后早期子宫内膜癌患者发生淋巴结转移的独立危险因素(均P<0.05)。血清HSP70、PKD1和YKL-40水平预测绝经后早期子宫内膜癌患者发生淋巴结转移的最佳截断点分别为90.82μg/L、132.23μg/L、75.32μg/L,三者联合预测的灵敏度、特异度和ROC曲线下面积(AUC)分别为81.82%、96.15%、0.940。结论:早期子宫内膜癌患者血清HSP70、PKD1、YKL-40水平可作为预测淋巴结转移的敏感指标,且三者联合预测的预测效能更高。

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.

来曲唑联合地塞米松对多囊卵巢综合征患者血清Galectin-3及HSP70的影响

目的 探讨来曲唑联合地塞米松对多囊卵巢综合征(PCOS)患者血清半乳糖凝集素-3(Galectin-3)及热休克蛋白(HSP70)表达的影响。方法 选择2019年6月—2021年6月在我院治疗的PCOS患者220例为研究对象,按随机数表法分为对照组(n=110)和观察组(n=110),对照组常规给予来曲唑治疗。观察组在对照组的基础上加用地塞米松联合治疗。观察并比较两组患者的激素水平,促排卵情况,血清抗苗勒管激素(AMH)、Galectin-3、HSP70及单核细胞趋化蛋白-1(MCP-1)水平及不良反应发生率。结果 治疗后两组患者的性激素水平均改善,且观察组变化幅度高于对照组(P<0.05)。观察组患者雌二醇(E_(2))用量低于对照组,成熟卵泡数量和最大卵泡直径均高于对照组(均P<0.05)。两组患者的早期流产率差异无统计学意义(P>0.05);观察组患者的妊娠率高于对照组(P<0.05)。治疗前两组患者AMH、Galectin-3、HSP70、MCP-1水平差异无统计学意义(P>0.05),治疗后两组患者的AMH、Galectin-3、HSP70、MCP-1水平均降低,且观察组低于对照组(P<0.05)。观察组和对照组分别有35例和34例出现胃肠道反应、头痛、乳房胀痛等不良反应,两组差异无统计学意义(χ^(2)=0.021,P=0.885)。结论 来曲唑联合地塞米松可能减轻氧化应激反应,减轻胰岛素抵抗,调节激素水平,促进排卵,安全性高,值得推广应用。

原发性肝癌患者高强度聚焦超声治疗前后HSP70、PTN、PIVKA-Ⅱ水平变化及对早期复发的预测效能

目的探究原发性肝癌(PHC)患者在高强度聚焦超声(HIFU)治疗前后热休克蛋白70(HSP70)、多效生长因子(PTN)、异常凝血酶原Ⅱ(PIVKA-Ⅱ)水平变化及对早期复发的影响和预测效能。方法选取2021年1月—2023年1月收治的PHC 120例,均行HIFU治疗,根据术后6个月是否复发分为复发组(26例)与未复发组(94例)。比较2组临床资料、治疗前后血清HSP70、PTN、PIVKA-Ⅱ水平及变化值(ΔHSP70、ΔPTN、ΔPIVKA-Ⅱ值),分析ΔHSP70、ΔPTN、ΔPIVKA-Ⅱ与HIFU治疗后早期复发的相关性,并评价预测效能。结果2组治疗后血清HSP70、PTN、PIVKA-Ⅱ水平较治疗前下降(P<0.05);复发组治疗前、治疗后血清HSP70、PTN、PIVKA-Ⅱ水平高于未复发组(P<0.01)。复发组血清ΔHSP70、ΔPTN、ΔPIVKA-Ⅱ值低于未复发组(P<0.01)。Spearman相关性分析显示,治疗前血清HSP70、PTN、PIVKA-Ⅱ与肿瘤直径、CNLC分期呈正相关,与分化程度呈负相关(P<0.01)。多因素Logistic回归分析显示,校正肿瘤直径、CNLC分期、分化程度因素前后血清ΔHSP70、ΔPTN、ΔPIVKA-Ⅱ值均与PHC患者HIFU治疗后早期复发独立相关(P<0.01);血清ΔHSP70、ΔPTN、ΔPIVKA-Ⅱ值联合预测PHC患者HIFU治疗后早期复发的曲线下面积为0.916(95%CI:0.851,0.958),敏感度为0.923,特异度为0.872,优于三者单独预测。结论PHC患者HIFU治疗前后HSP70、PTN、PIVKA-Ⅱ水平变化值与早期复发独立相关,且联合预测效能较高。

Hcy、HSP70、H-FABP对脑梗死患者的疗效评估作用

目的探讨同型半胱氨酸(Hcy)、热休克蛋白70(HSP70)、心型脂肪酸结合蛋白(H-FABP)对丁苯酞联合通窍活血汤治疗脑梗死患者的疗效评估作用。方法选取鹿邑县人民医院2021年10月至2022年10月收治的82例脑梗死患者作为研究对象,给予丁苯酞联合通窍活血汤治疗。比较有效组和无效组的临床资料及血清学指标,Logistic回归分析影响治疗效果的因素,分析血清Hcy、HSP70、H-FABP单独及联合检测预测治疗效果的价值并编制ROC曲线。结果治疗14 d后,显效38例、有效30例、无效14例,治疗有效率为82.93%。其中有效组68例,无效组14例;有效组Hcy、HSP70、H-FABP水平均低于无效组;Hcy、HSP70、H-FABP均是影响脑梗死患者治疗效果的危险因素;血清Hcy、HSP70、H-FABP联合检测预测治疗效果的AUC值高于单项检测,差异有统计学意义(Z_(Hcy)=3.038,Z_(HSP70)=2.411,Z_(H-FABP)=2.352,P<0.05)。结论血清Hcy、HSP70、H-FABP联合检测对丁苯酞联合通窍活血汤治疗的脑梗死患者的临床疗效具有一定预测价值。

Genotoxicity and Reduced Heat Shock Protein 70 in Human Airway Smooth Muscle Cells Exposed to Cigarette Smoke Extract

Cigarette smoke is associated with the development of several diseases, such as chronic ob- structive pulmonary disease （COPD）. The purpose of this study was to investigate genotoxicity and heat shock protein 70 （Hsp70） in human airway smooth muscle cells （HASMCs） exposed to cigarette smoke extract （CSE）. HASMCs was exposed to CSE with different doses for 24 h. The level of 8-hydroxydeoxyguanosine （8-OHdG） was determined by using HPLC-ECD, the DNA damage was ana- lyzed by using comet assay, and apoptosis was examined by using Annexin-FITC/PI staining. The pro- duction of Hsp70 after CSE stimulation was tested. Results indicated that CSE significantly increased the level of 8-OHdG, DNA damage and cell apoptosis, and reduced the production of Hsp70. In par- ticular, levels of Hsp70 were inversely correlated with 8-OHdG, DNA damage and cell apoptosis. It was concluded that cigarette smoke induced genotoxicity and decreased the production of cell protective protein Hsp70, which may contribute to the development of some airway diseases.

Novel heat shock protein Hsp70L1 activates dendritic cells and acts as a Th1 polarizing adjuvant

Heat shock proteins (HSPs) are reported to act as effective adjuvants to elicit anti-tumor and anti-infection immunity. Here, we report that Hsp70-like protein 1 (Hsp70L1), a novel HSP derived from human dendritic cells (DCs), has potent adjuvant effects that polarize responses toward Th1. With a calculated molecular weight of 54.8 kDa, Hsp70L1 is smaller in size than Hsp70 but resembles it both structurally and functionally. Hsp70L1 shares common receptors on DCs with Hsp70 and can interact with DCs, promoting DC maturation and stimulating secretion of the proinflammatory cytokines interleukin 12p70 (IL-12p70), IL-1beta, tumor necrosis factor-alpha (TNF-alpha), and the chemokines IP-10, macrophage inflammatory protein-1alpha (MIP-1alpha), MIP-1beta, and normal T cell expressed and secreted (RANTES). The induction of interferon-gamma-inducible protein 10 (IP-10) secretion by Hsp70L1 is not shared by Hsp70, and other functional differences include more potent stimulation of DC IL-12p70, CC-chemokine, and CCR7 and CXCR4 expression by Hsp70L1. Immunization of mice with the hybrid peptide Hsp70L1-ovalbumin(OVA)(257-264) induces an OVA(257-264)-specific Th1 response and cytotoxic T lymphocyte (CTL) that results in significant inhibition of E.G7-OVA tumor growth. The ability of Hsp70L1 to activate DCs indicates its potential as a novel adjuvant for use with peptide immunizations; the Hsp70L1 antigen peptide hybrid may serve as a more effective vaccine for the control of cancer and infectious diseases.

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.

Sleep deprivation increase the expression of inducible heat shock protein 70 in rat gastric mucosa

AIM To .investigate if sleep deprivation is able to increase the expression of inducible heat shock protein 70 in gastric mucosa and its possible role in mucosal defense.METHODS Rats for sleep disruption were placed inside a computerized rotating drum, gastric mucosa was taken from rats with 1, 3 and 7 d sleep deprivation. RT-PCR,immunohistochemistry and Western blotting were used to determine the expression of heat shock protein 70.Ethanol (500 mL@ L 1, I.g.) was used to induce gastric muceea damage.RESULTS RT-PCR, Western blotting and immunostaining confirmed that the sleep deprivation as a stress resulted in significantly greater expression of inducible heat shock protein 70 in gastric mucosa of rats. After the 500mL@ L-1 ethanol challenge, the ulcer area found in the rats with 7 d sleep deprivation (19.15 ± 4.2) mm2 was significantly lower (P＜0.01) than the corresponding control (53.7 ± 8.1) mm2.CONCLUSION Sleep deprivation as a stress, in addition to lowering the gastric mucosal barrier, is able to stimulate the expression of inducible heat shock protein 70 in gastric mucosa of rats, the heat shock protein 70 may play an important role in gastric mucosal protection.