慢性低O2高CO2时NO-sGC-cGMP细胞信号转导通路变化及与肺动脉高压的关系

目的 :探讨慢性低O2 高CO2 性肺动脉高压发生与发展中NO sGC cGMP细胞信号转导通路的变化和作用。方法 :雄性Sprague Dawley大鼠随机分为对照组与低O2 高CO2 肺动脉高压 1w、2w及 4w组。用比色法测定血浆NO含量 ,酶动力学法测定肺组织sGC活性 ,12 5 I 放射免疫法检测肺组织cGMP含量。结果 :低O2 高CO2 1w、2w、4w组mPAP较对照组均明显升高 (P均 <0 .0 1)。而血浆NO含量、肺组织sGC活性和肺组织cGMP含量均显著降低 (分别P <0 .0 5,P <0 .0 1或P <0 .0 0 1)。mPAP与血浆NO含量 (r =-0 .80 7,P <0 .0 1)、与肺组织sGC活性 (r=-0 .754,P <0 .0 1)、与肺组织cGMP含量 (r=-0 .62 1,P <0 .0 1)之间均存在显著负相关。结论 :低O2 高CO2 引起的NO sGC cGMP转导通路的遏制性变化导致肺动脉舒张性降低是形成肺动脉高压的重要机制     

嘌呤霉素肾病大鼠肾小球中nephrin、Podocin和α-actinin与蛋白尿的关系

目的动态观察肾小球足细胞及裂孔隔膜分子nephrin,podocin和α-actinin在嘌呤霉素(puromycinaminonucleoside,PAN)大鼠肾病模型肾组织中表达的时相变化,探讨这些分子间及这些分子与蛋白尿发生的关系。方法用间接免疫荧光染色及实时定量PCR方法,检测PAN注射后12h、1d、36h、2d、5d、10d、15d及20d大鼠肾小球中nephrin,podocin和α-actinin分子分布和表达。结果(1)PAN注射后1d、2d及5d时,尿蛋白量无明显改变;10d时尿蛋白量明显增加(P=0.02);20d时恢复至对照组水平。(2)对照组大鼠肾小球中nephrin和podocin沿肾小球毛细血管袢呈连续线状分布,α-actinin沿肾小球毛细血管袢呈点线状分布。PAN注射1d后,nephrin和podocin的分布即发生改变,表现为断续、非线性分布。nephrin和podocin的分布改变随着尿蛋白的增多而加重,尿蛋白恢复时也逐渐恢复。20d时,α-actinin沿肾小球毛细血管袢呈连续线性分布。(3)免疫荧光定量分析结果表明,在PAN注射后36h(P=0.04)、2d(P=0.03)及5d(P=0.04)时,肾小球中podocin的免疫荧光染色强度明显下降,于第10d降至最低(P=0.006);自15d时逐渐恢复(P=0.007),20d后podocin的免疫荧光强度恢复至对照组水平。nephrin的免疫荧光染色强度在PAN注射第5天后出现下降(P=0.002),持续下降至第10天(P=     

高浓度氟引起SH-SY5Y神经细胞中α7尼古丁受体水平降低

目的：观察氟中毒对神经细胞中α7尼古丁受体的影响。方法：体外培养SH-SY5Y神经细胞，在培养液中加人不同浓度的氟化物，培养48h后测定细胞MTT水平；用放射配体结合实验测定α7尼古丁受体亚型含量；用Westem Bloting方法测定α7尼古丁受体亚单位蛋白水平。结果：经氟处理的神经细胞中MTT水平降低，α7尼古丁受体最大结合容量降低，α7尼古丁受体亚单位蛋白含量减少。结论：氟中毒可引起SH—SY5Y神经细胞中α7尼古丁受体表达降低。     

掌板关节囊松解术治疗压砸伤术后掌指关节屈曲障碍

Objective To discuss the application of volar plate joint capsule release to treat metacarpophalangeal joint flexion contracture caused by severe crush injury to the palm. Methods From September 2005 to June 2008, 8 cases with post-traumatic metacarpophalangcal joint flexion contracture caused by severe crush injury was treated with volar plate joint capsule release. Postoperatively the patients underwent keritherapy and functional exercise. They were followed up to evaluate recovery of metacarpopha]angeal joint flexion. Results All 8 patients had metacarpophalangeal joint flexion contracture of the middle finger. The joint flexion function was improved remarkably after the surgery. The joint movement limitation decreased to 0° to30°and the functional impairment reduced to 0% to 18%. Conclusion V olar plate joint capsule release is an excenent method to treat metacarpophalangeal joint flexion eontraeture caused by severe palm crush injuiy. It is easy to operate and leads to reliable results.     

第一掌背动脉逆行筋膜皮瓣修复示指软组织缺损

目的 介绍一种新型逆行筋膜皮瓣修复示指皮肤缺损。方法 我院于1997～2003年，采用第一掌背动脉逆行筋膜皮瓣修复示指皮肤缺损9例，该皮瓣以第一掌背动脉在第二掌骨背侧的纵轴为轴线，以筋膜为蒂，蒂部设计在皮瓣的远侧，供血动脉为示指桡侧指动脉。结果 皮瓣全部成活，随访半年以上5例，修复后指腹两点辨别觉为6mm～11mm(平均7．9mm)，外形满意，患均恢复原工作。结论 切取第一掌背动脉逆行岛状筋膜皮瓣修复示指皮肤缺损安全可行，是修复示指皮肤大面积缺损的较理想方法。     

Subcutaneously administered recombinant human β-interferon in the treatment of chronic hepatitis B virus infection

Background: Treatment of chronic replicative hepatitis B virus (HBV) infection is aimed at stopping viral replication and preventing the development of chronic liver disease. β-Interferon treatment has been less well studied than α-interferon. Methods: The efficacy and tolerability of a 6-month course of subcutaneously administered human recombinant β-interferon (rINF-β_ser) was studied and the results of a low-dose regime compared with a high-dose regime. Twenty patients (17 men and three women), aged 24–54 years, with chronic hepatitis B virus infection (all hepatitis B surface antigen-positive with detectable HBV-DNA in their sera for at least 3 months prior to therapy) were randomized into two treatment groups of 10 patients each. The low-dose group received 6×10⁶ U/dose and the high-dose group received 30×10⁶ U/dose, both groups receiving their respective doses three times a week initially for 1 month and continuing for a total of 6 months. Results: The treatment was well tolerated in both groups. None of the patients required dosage reduction or cessation of treatment because of side-effects. HBV-DNA decreased in all patients during treatment, demonstrating the anti-viral efficacy of rINF-β_ser, and was undetectable in 20 and 40% of patients receiving low-dose and high-dose regimes, respectively, at the end of 6 months treatment (P=N.S.). One year after completion of treatment, HBV-DNA was undetectable in 50 and 30% of patients in the low-dose and high-dose groups, respectively (P=N.S.). However, only one patient achieved seroconversion with loss of the hepatitis B surface antigen and appearance of an anti-hepatitis B ‘e’ antigen at the end of 18 months. Conclusion: This study shows that subcutaneously administered rINF-β_ser is well tolerated, but the optimal dose and duration of treatment still needs to be defined by further studies.     

内皮超极化因子的研究进展

内皮超极化因子（EDHF）是由内皮释放的NO和PGI_2以外的另一种舒张因子,它通过使平滑肌细胞膜超极化而舒张血管,是内皮依赖性血管松驰的第3种重要机制。EDHF可能是花生四烯酸的细胞色素P450代谢产物EET-s,乙酰胆碱、缓激肽等激动剂作用于内皮细胞,使细胞内游离钙浓度升高,合成和（或）释放EDHF,作用于平滑肌细胞膜,激活钙依赖性钾通道,使细胞膜超极化,抑制电压依赖性钙通道的开放,引起血管松弛。在大血管中NO-cGMP松弛机制可能占主导地位,并且抑制EDHF生成;而在阻力小血管,EDHF则可能是引起血管松弛的主要因素。     

康复新液联合奥美拉唑对HP阴性胃溃疡的疗效分析

目的分析康复新液联合奥美拉唑治疗幽门螺杆菌(HP)阴性胃溃疡患者的疗效。 方法选取HP阴性胃溃疡患者108例,随机均分为对照组和联合组。对照组接受奥美拉唑针剂治疗,联合组接受康复新液联合奥美拉唑针剂治疗。比较两组临床疗效、血清胃蛋白酶原(PG)、高迁移率族蛋白B1(HMGB1)、细胞炎症因子水平及不良反应发生率。 结果联合组治疗总有效率高于对照组(P＜0.05)。与治疗前比较,两组治疗后PGⅠ、PGⅡ、HMGB1、白细胞介素-6、肿瘤坏死因子-α及C反应蛋白均有降低,且联合组较对照组降低更明显(P＜0.05)。两组患者治疗期间总不良反应发生率比较,差异无统计学意义(P＞0.05)。 结论康复新液联合奥美拉唑针剂可提高HP阴性胃溃疡患者的临床疗效,值得临床应用推广。     

TRPV4抑制剂HC067047对小鼠膝骨关节炎软骨组织的影响

目的探讨瞬时受体电位香草素受体4型通道蛋白(TRPV4)抑制剂HC067047对小鼠膝骨关节炎软骨组织的影响。 方法将30只小鼠均分为假手术组、模型组、HC067047组。假手术组仅切开右侧膝关节髌韧带内侧皮肤,不予处理膝关节囊内结构;模型组、HC067047组手术切除小鼠板股韧带及内侧半月板前角以构建膝骨关节炎,分别用生理盐水、HC067047每天10 mg/kg灌胃。qRT-PCR检测各组小鼠软骨组织中TRPV4 mRNA表达水平。番红固绿染色评估关节软骨受损程度,HE染色分析膝关节软骨下骨的骨量变化。Western blotting检测各组软骨组织中细胞焦亡标志蛋白TRPV4、Caspase-1、核苷酸结合寡聚化结构域样受体家族热蛋白结构域蛋白3(NLRP3)、凋亡相关斑点样蛋白(ASC)、GSDMD-N蛋白水平;ELISA、Western blotting分别检测血清、软骨组织中炎症因子水平。 结果与假手术组比较,模型组TRPV4、NLRP3、ASC、Caspase-1、GSDMD-N、IL-1β、IL-18水平显著升高(P＜0.05)。与模型组比较,HC067047组NLRP3、ASC、Caspase-1、GSDMD-N、IL-1β、IL-18水平显著降低(P＜0.05)。HC067047能明显改善关节软骨形态及降低骨关节炎受损程度,并能维持软骨下骨的骨量。 结论TRPV4抑制剂HC067047能抑制软骨组织细胞焦亡,改善膝骨关节炎小鼠关节软骨的退变。     

亚临床甲状腺功能减退症患者TSH与肾上腺皮质功能的关系

目的分析亚临床甲状腺功能减退症患者促甲状腺激素(TSH)与肾上腺皮质功能的关系。 方法选取150例亚临床甲状腺功能减退症患者为研究组,甲状腺功能正常的健康人群150例为对照组。比较两组TSH、游离三碘甲腺原氨酸(FT3)、游离甲状腺素(FT4)、皮质醇(CORT)和促肾上腺皮质激素(ACTH)水平。采用Pearson法分析亚临床甲状腺功能减退症患者TSH水平与ACTH、CORT水平的相关性。 结果与对照组比较,研究组患者TSH、ACTH水平升高,CORT水平降低(P＜0.05)。Pearson分析结果显示,亚临床甲状腺功能减退症患者TSH水平与ACTH水平呈正相关(P＜0.05),与CORT水平呈负相关(P＜0.05)。 结论亚临床甲状腺功能减退症患者血清TSH水平与肾上腺皮质功能指标ACTH、CORT水平存在相关性。