Cystic fibrosis transmembrane conductance regulator is correlated closely with sperm progressive motility and normal morphology in healthy and fertile men with normal sperm parameters

Cystic fibrosis transmembrane conductance regulator (CFTR) has been demonstrated to be expressed in mature spermatozoa and correlated with sperm quality. Sperm CFTR expression in fertile men is higher than that in infertile men suffering from teratospermia, asthenoteratospermia, asthenospermia and oligospermia, but it is unknown whether CFTR is correlated with sperm parameters when sperm parameters are normal. In this study, 282 healthy and fertile men with normal semen parameters were classified into three age groups, group (I): age group of 20–29 years (98 cases, 27.1 ± 6.2), group (II): age group of 30–39 years (142 cases, 33.7 ± 2.6) and group (III): age group of more than or equal to 40 years (42 cases, 44.1 ± 4.6). Sperm concentration, total count and progressive motility were analysed by computer‐assisted sperm analysis. Sperm morphology was analysed by modified Papanicolaou staining. Sperm CFTR expression was conducted by indirect immunofluorescence staining. There was a significant positive correlation (P < 0.001) between CFTR expression and sperm progressive motility (r = 0.221) and normal morphology (r = 0.202), but there were no correlations between sperm CFTR expression and semen volume, sperm concentration, sperm total count as well as male age (P > 0.05). Our findings show that CFTR expression is associated with sperm progressive motility and normal morphology in healthy and fertile men with normal sperm parameters, but not associated with the number of spermatozoa and male age.     

Research progresses of molecular mechanism of pyroptosis and its related diseases

Pyroptosis is a newly discovered untypical form of programmed cell death by inflammatory response, which is dependent on the classic pathway of Caspase-1 and the non-canonical pathway of Caspase-11 in mice or orthologue Caspase-4/-5 in Humans. It has been found that the Gasdermin family of protein is a key molecule in the formation of membrane pores of pyroptosis. After being cleaved by inflammatory caspases, it releases a N-terminal fragment with perforating activity to trigger pyroptosis. That pyroptosis is closely related to the occurrence and development of certain diseases. Now, the molecular mechanism of pyroptosis and pyroptosis-related diseases are reviewed.     

不同静脉麻醉药对诱导和气管插管期间血压、ET和NO的影响

目的 探讨硫喷妥钠、异丙酚、依托咪酯诱导对气管插管期间血压、脉搏及其内皮素(endothelin,ET)、一氧化氮(nitric oxide,NO)的影响.方法 择期气管插管全麻患者40例,随机分为3组:硫喷妥钠组(T组)、异丙酚组(P组)、依托咪酯组(E组).常规全麻诱导气管插管,分别在诱导前、诱导后插管前、插管后1、3、5 min记录血压、心率,并同时收集血样,分别采用放射免疫技术和硝酸还原酶法测定血中ET、NO的浓度.结果 全麻诱导后P组血压下降幅度最大,P组ET显著降低,T组和P组的NO显著升高.气管插管后1 min各组血压、脉搏均显著升高,各组ET、ET/NO均升高,NO均降低.结论 3种药物临床剂量对血压的抑制程度分别为异丙酚＞硫喷妥钠＞依托咪酯,并与对应时间点体内ET、NO的变化有相关关系.     

加强医疗服务软件建设促进医患关系健康和谐

从加强医疗服务软件建设的层面,对以德依法强化医德医风建设,健全并落实管理制度与服务规范,开展人性化医疗服务,切实提高医疗服务质量,促进医患关系走向健康和谐问题作了研讨。     

N-乙酰半胱氨酸对肝缺血再灌注损伤大鼠Toll样受体4表达的影响

目的：探讨N-乙酰半胱氨酸(N-acetylcysteine,NAC)对肝缺血再灌注(ischemic reperfusion,I/R)损伤大鼠Toll样受体4(Toll-like receptor 4,TLR4)表达的影响。方法：Wistar大鼠随机分为3组：假手术组(P)、I/R组、I/R+NAC组。P组只开腹不阻断肝血流,另2组阻断大部肝血流后再灌注,其中I/R+NAC组再灌注前5 min尾静脉给予300 mg/kg NAC。各组分别检测不同时间点的血丙氨酸转氨酶(ALT)、天冬氨酸转氨酶(AST)、脂多糖(LPS)与肝组织TLR4 mRNA及其蛋白。结果：在各时间点,P组血ALT,AST,LPS和肝绍织TLR4表达无显著差异；另2组较P组均有显著升高,但I/R+NAC组各指标升高低于I/R组。肝组织TLR4 mRNA表达在I/R组从3 h起显著增强并维持高表达,而I/R+NAC组各时相无显著变化；但两者TLR4蛋白表达变化类似,都在6,24 h表达显著增强。结论：LPS及其TLR4参与了I/R肝损伤的病理过程；NAC减弱肠源性LPS及其启动的TLR4炎症信号通路而保护缺血再灌注肝损伤。     

KLF6基因在原发性肝癌中的表达

目的 通过研究潜在抑癌基因KLF6在肝细胞癌的表达,探讨KLF6基因作为肝癌抑制基因的可能性.方法 分别用荧光定量PCR、半定量RT-PCR和Western blot方法检测肝细胞癌及癌旁组织中KLF6基因在mRNA及蛋白水平的表达变化.结果 实时荧光定量PCR显示经过看家基因GAPDH标化的KLF6 cDNA 起始浓度,在配对癌旁组织约为肝癌组织的3倍.26例肝癌组织的KLF6 mRNA表达水平与配对癌旁组织相比,差异具有显著性意义(P<0.01).在肝癌细胞株HepG2及Hep3B,KLF6 mRNA的表达亦显著低于正常对照细胞L02(P<0.01).实验还发现,在肝细胞癌中KLF6蛋白表达变化与mRNA表达变化一致,即KLF6蛋白在癌组织及肝癌细胞的表达明显低于癌旁组织及L02(P<0.01).结论 KLF6表达下调可能是肝细胞癌的遗传学改变之一, KLF6基因可能为新的肝癌相关抑癌基因.     

彭氏胰胃吻合术-Ⅰ型与Ⅱ型的比较（兼论Ⅲ型和Ⅳ型）

目的：介绍并比较4种类型捆绑式胰胃吻合术（binding pancreaticogastrostomy,BPG）,探讨其临床应用价值。方法：2008年5月至2009年5月,共施行Ⅰ型BPG21例,均行胰十二指肠切除术;施行Ⅱ型BPG26例．除2例胰腺颈部肿瘤行胰腺中段切除外,其余均行胰十二指肠切除术。这两型在操作中均切开胃前壁或胃残端（该切口可用作胃肠吻合口）,将胰腺残端拉入胃腔后进行捆绑吻合。在此期间,同时设计了Ⅲ型BPG和Ⅳ型BPG,两者均避免切开胃前壁或胃残端,在胃后壁处进行胰胃捆绑吻合。结果：全组手术均顺利完成;其中Ⅰ型BPG术后2例出现少量胸腔积液,1例胃排空障碍,2例胆漏;Ⅱ型BPG术后1例出现腹水,2例胃排空障碍,1例腹腔出血;上述病人均经保守治疗而痊愈;2组均未出现胰胃吻合口漏,无死亡病例。结论：BPG具有胆胰分道、胰腺吻合口处于胃液平面以上有利于愈合、无论胰腺残端大小均可实施等诸多特点;4种类型BPG各具优势,但均可有效避免胰漏的发生,显著提高了胰腺手术的安全性。