不同临床类型乙型病毒感染者外周血T 细胞亚群与血清HBV DNA 载量 及HBeAg 滴度相关性分析

目的:探讨慢性乙型肝炎病毒(HBV)感染患者外周血T细胞亚群与血清HBV DNA载量及HbeAg滴度的关系。方法:选取103名HBV感染患者和20名健康者为研究对象。流式细胞术检测外周血T细胞亚群,聚合酶链式反应及酶免疫分析法分别检测血清HBV DNA载量及HbeAg滴度。结果:慢性乙型肝炎患者和慢性HBV携带者外周血CD3+T、CD4+T淋巴细胞亚群百分数低于健康对照组,结果有统计学意义(P<0.05或0.01;而CD8+T细胞亚群则呈现相反趋势,结果亦有统计学意义(P<0.05或0.01)。HBeAg阴性组中,HBVDNA水平与CD8+T细胞亚群百分数呈正相关(r=0.567,P<0.01),与CD4+/CD8+T细胞亚群百分数比值呈负相关(r=-0.601,P<0.01),而与CD3+T、CD4+T细胞亚群百分数无相关性。HBeAg阳性组中,HBV DNA水平及HbeAg滴度与CD3+T、CD4+T、CD8+T细胞百分数及CD4+/CD8+T细胞百分数均无相关性(P>0.05)。结论:不同临床类型的慢性乙型肝炎病毒感染患者外周血T细胞亚群存在不同程度细胞免疫功能降低和细胞免疫调节异常。HbeAg阴性的HBV感染患者,其血清HBV DNA水平与外周血T淋巴细胞免疫存在相关性。     

急性病毒性肝炎患者外周血T 细胞亚群的检测和分析

目的:检测急性甲、乙型病毒性肝炎患者外周血T淋巴细胞亚群变化,探讨其对疗效和预后意义。方法:采用APAAP桥联酶标法检测115例急性甲、乙型病毒型肝炎患者外周血CD3+、CD4+、CD8+T细胞亚群比例,计算CD4+/CD8+值。并检测了34例患者治疗前后T淋巴细胞亚群变化。结果:115例急性甲、乙型病毒性肝炎患者外周血CD3+、CD4+T细胞比例及CD4+/CD8+值均低于正常对照组(P<0.05),而CD8+T细胞比例均高于正常对照组(P<0.01)。6例无明显疗效者,各亚群比例在治疗前后无显著差异(P>0.05)。28例有明显疗效者,治疗后各亚群比例恢复正常水平,与治疗前相比差别具有统计学意义(P<0.05)。结论:急性甲、乙型病毒性肝炎患者外周血CD4+/CD8+T细胞比值可在一定程度上反映疗效及预后。     

哮喘患者外周血Treg和Th1/Th2的变化及其与哮喘病情的关系

目的:探讨哮喘患者外周血调节性T细胞(Treg)以及辅助性T细胞(Th1/Th2)的比例的变化,探讨其在哮喘的临床治疗中的作用。方法:80例哮喘患者(哮喘组)按临床表现分为急性发作期组(54例)和缓解期组(26例),同时选择50例健康体检者。应用流式细胞仪检测上述各组外周血CD4+CD25+Foxp3+Treg、CD4+IFN-γ+Th1和CD4+IL-4+Th2细胞水平,并进行统计学分析。结果:哮喘组CD4+CD25+Foxp3+Treg水平亦明显低于正常对照组(P<0.05。其中急性发作期组Treg水平明显低于缓解期组和正常对照组(P<0.05)。而哮喘组Th1/Th2比值显著低于对照组(P<0.05),且在哮喘急性发作组中Th1/Th2比值显著低于缓解期组和正常对照组(P<0.05)。结论:提示Treg和Th在哮喘的发生和发展中起着重要的作用。     

肺癌患者外周血淋巴细胞亚群水平的表达及临床意义

目的:探讨肺癌患者外周血淋巴细胞亚群水平的表达及临床意义。方法:选择2016年3月~2017年3月期间我院收治的88例肺癌患者作为研究组,选择同期于我院进行健康体检的88例受检者作为对照组。两组研究对象均通过流式细胞仪检测外周血T淋巴细胞亚群水平。观察对比两组研究对象外周血T淋巴细胞亚群的表达水平,以及研究组不同临床病理特征患者外周血T淋巴细胞亚群的表达水平。结果:研究组CD4~+/CD8~+、CD4~+、CD3~+表达水平均低于对照组,CD8~+表达水平高于对照组,差异具有统计学意义(P0.05)。研究组Ⅲ期与Ⅳ期患者CD4~+/CD8~+、CD4~+、CD3~+表达水平均低于Ⅰ期与Ⅱ期,Ⅲ期与Ⅳ期患者CD8~+表达水平高于Ⅰ期与Ⅱ期(P0.05);小细胞肺癌患者CD4~+/CD8~+、CD4~+、CD3~+表达水平均低于非小细胞肺癌患者,CD8~+表达水平高于非小细胞肺癌患者,差异具有统计学意义(P0.05)。不同性别、年龄、肿瘤分化程度肺癌患者CD4~+/CD8~+、CD8~+、CD4~+、CD3~+水平无统计学差异(P0.05)。结论:肺癌患者外周血淋巴细胞亚群水平的表达呈现异常状态,且表达水平与疾病的分期和病理分型有关。     

黄芪多糖对大鼠口腔溃疡治疗作用研究

本研究旨在探讨黄芪多糖对患有口腔溃疡大鼠(recurrent aphthous ulcer,RAU)的表皮细胞生长因子(epidermal growth factor,EGF)水平及T淋巴细胞亚群的影响。根据溃疡面的直径计算愈合率及HE染色观察溃疡组织病理学改变,酶联免疫吸附法(ELISA)测定EGF的水平,流式细胞仪检测大鼠外周血CD4+T细胞、CD8+T细胞亚群的百分率。实验结果显示治疗20 d后,黄芪多糖组大鼠溃疡面积减小,愈合率为87.5%～100%。与正常对照组相比,模型对照组大鼠CD4+T细胞数减少、CD8+T细胞数升高,CD4+/CD8+比值降低(P<0.05)。与模型对照组相比,黄芪多糖组大鼠外周血CD4+T细胞数升高、CD8+T细胞数降低,CD4+/CD8+比值回升(P<0.05)。EGF水平在造模后出现明显下降,黄芪多糖灌胃治疗后有升高。提示黄芪多糖能够提高RAU实验性大鼠EGF的水平和改善T细胞亚群的失衡状态,具有明显地促进口腔溃疡愈合的作用。     

T3期大肠癌患者新辅助化疗与手术前后外周血T细胞亚群变化的研究

目的:探讨T3期大肠癌患者新辅助化疗与手术前后外周血T细胞亚群免疫功能的变化规律.方法:入组56例T3期大肠癌患者,以奥沙利铂为主的新辅助联合化疗后行根治性手术,采用流式细胞术检测新辅助化疗前1天、术后第7天及术后14天外周血中T细胞亚群免疫功能(CD3+、CD3+CD4+、CD3+CD8+、CD4+/CD8+)的变化规律.并与50例健康对照组比效.结果:T3期大肠癌患者新辅助化疗前外周血T细胞亚群免疫功能低于正常对照组,但差异无统计学意义(P＞0.05);T3期大肠癌患者新辅助化疗及手术后7天外周血T细胞亚群免疫功能明显低于未治疗前患者,差异有统计学意义(P＜0.01);T3期大肠癌患者新辅助化疗及手术后14天外周血T细胞亚群免疫功能稍低于未治疗前患者,但差异无统计学意义(P＞0.05).结论:T3期大肠癌患者细胞免疫功能低下,经新辅助化疗与手术后1周细胞免疫功能进一步下降,但术后2周细胞免疫功能已恢复接近至治疗前水平.提示T3期大肠癌患者经新辅助化疗与手术治疗前后免疫功能呈U形的变化规律,能为临床根据细胞免疫功能更好地进行大肠癌的综合治疗提供理论依据.     

不同麻醉方法对胃肠道肿瘤手术病人细胞免疫功能的影响

目的:探讨不同麻醉方法对胃肠道肿瘤患者围术期外周血T细胞亚群以及白细胞介素-2(IL-2)的影响.方法:选择胃肠道肿瘤手术患者40例,随机分为两组.采用单纯全麻者为对照组,采用全麻复合硬膜外麻醉者为治疗组.分别于麻醉前、麻醉后不同时间点抽取静脉血,流式细胞术测定CD4+T及CD8+T细胞亚群数量,ELISA法测定血清IL-2的浓度.结果:麻醉后两组患者的CD4+T细胞、CD4+/CD8+比值和血清IL-2浓度均有所下降,与麻醉前比较差异有统计学意义(P＜0.05),治疗组患者的CD4+T细胞及IL-2下降程度不如对照组患者明显,且恢复较快,两组间差异有统计学意义(P＜0.05).结论:胃肠道肿瘤患者在麻醉手术后其细胞免疫功能受到不同程度的抑制,但复合麻醉较单纯全麻的免疫抑制效应低且恢复较快.     

探讨肺曲霉病患者甘露聚糖结合凝集素(MBL)及T细胞亚群的变化

目的探讨肺曲霉病急性期患者甘露聚糖结合凝集素(MBL)及T细胞亚群的变化。方法收集2013年5月~2015年5月就诊于山东省胸科医院呼吸科的肺曲霉病患者51例,同时选52例健康查体者作为对照组,采用Elisa方法检测血清MBL和半乳甘露聚糖(GM)的水平。同时分离外周血单个核细胞,通过流式细胞仪检测测定CD3~+CD4~+T淋巴细胞百分比、CD3~+CD8~+T淋巴细胞百分比及CD3~+CD4~+/CD3~+CD8~+T淋巴细胞比值。结果肺曲霉病组、健康对照组血清MBL水平为197.96±148.16和120.25±98.65μg/mL,P0.05,差异有统计学意义;血清GM水平分别为0.94±0.77μg/L和0.32±0.16μg/L,P0.05,差异有统计学意义。肺曲霉病组、健康对照组CD3~+CD4~+T淋巴细胞百分比分别为33.07±7.97、40.32±7.30(P0.05),CD3~+CD8~+淋巴细胞百分比为33.00±8.29、25.98±6.65(P0.05),CD3~+CD4~+/CD3~+CD8~+T淋巴细胞比值为1.08±0.47、1.68±0.65(P0.05)。结论肺曲霉病组患者的MBL及CD3~+CD4~+T淋巴细胞、CD3~+CD8~+T淋巴细胞、CD3~+CD4~+/CD3~+CD8~+T淋巴细胞比值会出现显著的变化,可以初步评估患者机体免疫状态,也为肺曲霉病的免疫增强治疗提供了理论依据。     

哮喘患者诱导痰和外周血CD3+CD56+NKT 细胞的检测及意义

目的:研究CD3+CD56+NKT细胞在哮喘患者急性发作期诱导痰和外周血中的比例改变,并探讨其临床意义.方法:以28例哮喘急性发作期患者为研究组,22名正常人作为对照组,采用二色直接荧光素标记法和多参数流式细胞仪检测诱导痰和外周血CD3+CD56+NKT细胞的比例,同时检测外周血IL-4、Ig-E及INF-γ等水平.结果:哮喘患者急性发作期诱导痰和外用血CD3+CD56+NKT细胞明显高于健康对照组(P<0.01).哮喘患者急性发作期外周血IL-4、Ig-E及INF-γ等水平明显高于健康对照组(P<0.05).哮喘患者外周血中CD3+CD56+NKT细胞比例与IL-4、Ig-E及INF-γ升高成正相关.结论:哮喘患者急性发作期诱导痰和外周血中的CD3+CD56+NKT细胞明显增高,CD3+CD56+NKT细胞可能通过调节IL-4、Ig-E及INF-γ等细胞因子从而在哮喘的发病机制发挥重要作用.     

阴道微生态与宫颈HPV感染患者炎性因子和T细胞亚群的相关性分析CSCD

目的分析阴道微生态与宫颈感染人乳头瘤病毒(HPV)患者炎性因子、 T细胞亚群的相关性。方法 选取120例宫颈感染HPV患者作为观察组,另选取95例同期体检健康女性作为对照组,观察2组阴道菌群情况、T细胞亚群水平(CD4+、CD8+、CD4+/CD8+)、IFN-γ和IL-4等炎性因子水平。观察组根据患者阴道微生态情况又分为阴道微生态失衡组和阴道微生态正常组,比较两组T细胞亚群和炎性因子水平;ROC曲线评估T细胞亚群和炎性因子预测阴道微生态失调的价值;采用Spearman相关性分析分析阴道菌群失调与HPV感染患者T细胞亚群变化和炎性因子水平的关系。结果 观察组阴道微生态失衡率明显46.7%高于对照组6.3%(P<0.05);观察组CD4+T细胞、CD4+/CD8+、IFN-γ水平均较对照组低,CD8+T细胞、IL-4水平均较对照组高(P<0.05);阴道微生态失衡者CD4+T细胞、CD4+/CD8+和IFN-γ水平低于阴道微生态正常者,而CD8+T细胞、IL-4水平高于阴道微生态正常者(P<0.05);血清IFN-γ、IL-4、CD4+T细胞、CD8+T细胞、CD4+/CD8+联合预测HPV感染患者阴道微生态失衡的AUC为0.972,灵敏度、特异度分别为85.7%、98.4%;Spearman相关性分析显示,HPV感染患者血清IFN-γ、IL-4、CD4+T细胞、CD8+T细胞、CD4+/CD8+水平与阴道菌群失调呈正相关(P<0.05)。结论 HPV感染患者阴道微生态失衡,出现免疫功能紊乱和炎症反应,血清T细胞亚群和炎性因子与患者阴道微生态失衡有相关性,在一定程度上能预测HPV感染患者阴道微生态失衡的发生。     

Role for dopamine in malonate-induced damage in vivo in striatum and in vitro in mesencephalic cultures

Defects in mitochondrial energy metabolism have been implicated in the pathology of several neurodegenerative disorders. In addition, the reactive metabolites generated from the metabolism and oxidation of the neurotransmitter dopamine (DA) are thought to contribute to the damage to neurons of the basal ganglia. We have previously demonstrated that infusions of the metabolic inhibitor malonate into the striata of mice or rats produce degeneration of DA nerve terminals. In the present studies, we demonstrate that an intrastriatal infusion of malonate induces a substantial increase in DA efflux in awake, behaving mice as measured by in vivo microdialysis. Furthermore, pretreatment of mice with tetrabenazine (TBZ) or the TBZ analogue Ro 4-1284 (Ro-4), compounds that reversibly inhibit the vesicular storage of DA, attenuates the malonate-induced DA efflux as well as the damage to DA nerve terminals. Consistent with these findings, the damage to both DA and GABA neurons in mesencephalic cultures by malonate exposure was attenuated by pretreatment with TBZ or Ro-4. Treatment with these compounds did not affect the formation of free radicals or the inhibition of oxidative phosphorylation resulting from malonate exposure alone. Our data suggest that DA plays an important role in the neurotoxicity produced by malonate. These findings provide direct evidence that inhibition of succinate dehydrogenase causes an increase in extracellular DA levels and indicate that bioenergetic defects may contribute to the pathogenesis of chronic neurodegenerative diseases through a mechanism involving DA.     

Scurvy in capybaras bred in captivity in Argentine

In order to determine if the absence of vitamin C in the diet of capybaras (Hydrochoerus hydrochaeris) causes scurvy, a group of seven young individuals were fed food pellets without ascorbic acid, while another group of eight individuals received the same food with 1 g of ascorbic acid per animal per day. Animals in the first group developed signs of scurvy-like gingivitis, breaking of the incisors and death of one animal. Clinical signs appeared between 25 and 104 days from the beginning of the trial in all individuals. Growth rates of individuals deprived of vitamin C was considerably less than those observed in the control group. Deficiency of ascorbic acid had a severe effect on reproduction of another population of captive capybaras. We found that the decrease in ascorbic acid content in the diet affected pregnancy, especially during the first stages. The results obtained suggest that it is necessary to supply a suitable quantity of vitamin C in the diet of this species in captivity.     

Changes in lactate dehydrogenase activity in chicken tissues in hyperthyreosis in ontogenesis

The lactate dehydrogenase activity in reactions of lactate oxidation and synthesis was studied in subfractions of the chicken brain, heart and liver at the embryonal, early postembryonal and adult stages of development after thyroxine administration. It has been shown that during embryogenesis thyroxine predominantly enhanced the rate of lactate oxidation in the mitochondrial tissues. A marked increase in the lactate synthesis was found in cytoplasm of the adult chicken tissues. Specificity of enzyme activity alterations was detected in the chicken brain during ontogenesis after thyroxine administration.     

SSTR5 ablation in islet results in alterations in glucose homeostasis in mice

Somatostatin (SST) peptide is a potent inhibitor of insulin secretion and its effect is mediated via somatostatin receptor 5 (SSTR5) in the endocrine pancreas. To investigate the consequences of gene ablation of SSTR5 in the mouse pancreas, we have generated a mouse model in which the SSTR5 gene was specifically knocked down in the pancreatic beta cells (betaSSTR5Kd) using the Cre-lox system. Immunohistochemistry analysis showed that SSTR5 gene expression was absent in beta cells at three months of age. At the time of gene ablation, betaSSTR5Kd mice demonstrated glucose intolerance with lack of insulin response and significantly reduced serum insulin levels. Insulin tolerance test demonstrated a significant increase of insulin clearance in vivo at the same age. In vitro studies demonstrated an absence of response to SST-28 stimulation in the betaSSTR5Kd mouse islet, which was associated with a significantly reduced SST expression level in betaSSTR5Kd mice pancreata. In addition, betaSSTR5Kd mice had significantly reduced serum glucose levels and increased serum insulin levels at 12 months of age. Glucose tolerance test at an older age also indicated a persistently higher insulin level in betaSSTR5Kd mice. Further studies of betaSSTR5Kd mice had revealed elevated serum C-peptide levels at both 3 and 12 months of age, suggesting that these mice are capable of producing and releasing insulin to the periphery. These results support the hypothesis that SSTR5 plays a pivotal role in the regulation of insulin secretion in the mouse pancreas.