质粒pGH/BL_(21)在大肠杆菌中表达条件的研究

目的　寻找质粒 pGH/BL2 1在大肠杆菌中的最佳表达条件。方法　当它在大肠杆菌中表达时 ,考查不同IPTG诱导浓度及不同的诱导时间对表达产物的影响 ,表达产物的量以SDS -PAGE电泳方法分析。结果　该基因的最佳表达条件为 :IPTG诱导浓度 1.0mmol/L ,诱导时间 4h。结论　IPTG对不同的基因在不同的表达体系中需不同的诱导条件 ,只有找到它的最佳诱导条件才能保证终产物的最大产率     

生长激素在体外对人胃癌细胞的作用

目的　研究重组人生长激素 (rhGH)在体外对人胃癌细胞生长的影响。方法　实验分组 :对照组、rhGH组、奥沙利铂 (L OHP)组和rhGH L OHP组 ,利用体外细胞培养、MTT比色技术及流式细胞仪等方法 ,测定不同浓度的rhGH对人胃癌细胞株BGC82 3生长曲线、细胞抑制率、细胞周期和增殖指数 (PI)的影响。结果　rhGH在体外无明显促进BGC82 3细胞分裂增殖 ,rhGH组与对照组、rhGH L OHP组与L OHP组比较差异均无显著性 (P >0 .0 5 ) ,且生长曲线没有升高 ;rhGH L OHP组与对照组比较或rhGH L OHP组与对应的rhGH组配对比较 ,细胞抑制率增加 ,阻滞于G0 ～G1期的细胞数增加 ,S期细胞明显减少 ,PI明显降低 (P <0 .0 1)。rhGH L OHP组与L OHP组比较 ,细胞抑制率呈现升高趋势 ,而PI呈下降趋势 ,提示rhGH与抗肿瘤药合用可以增强抗肿瘤药对肿瘤细胞的杀伤作用。结论　rhGH在体外无明显促进胃癌细胞的分裂增殖 ,与抗肿瘤药合用可提高抗肿瘤药的疗效。     

免疫球蛋白联合鞘内注射激素治疗重症格林-巴利综合征

目的观察免疫球蛋白联合鞘内注射激素治疗重症格林-巴利综合征的疗效。方法应用Hughes量表评价疗效。结果治疗组起效时间明显短于对照组,治疗组Hughes临床分级评分改善明显优于对照组。结论免疫球蛋白联合鞘内注射激素治疗重症格林-巴利综合征可缩短病程、缓解急性期症状。     

Women's knowledge, practises, and intentions regarding correct pelvic floor exercises.

AIM: Although research has demonstrated the efficacy of pelvic floor exercises (PFXs) for the prevention and treatment of female urinary incontinence (FUI), adherence to PFX regimens is commonly poor. There is some evidence that this finding is in part due to a lack of knowledge about how to perform PFXs correctly and misconceptions about the required frequency and duration of PFX regimens. METHODS: By using a sample of 720 postpartum women, this study investigates women's PFX regimens both before and during pregnancy and postpartum. RESULTS: Findings demonstrated that most women were aware of the required frequency for PFXs (at least every second day): just over half had done them this often during pregnancy and 91% intended to do so postpartum. However, few had done them at this level before pregnancy and less than half knew that PFXs should be carried out indefinitely throughout the lifetime. Moreover, only two thirds were confident that they were doing PFXs correctly. CONCLUSION: The findings suggest that, despite good knowledge of the required frequency of PFXs, few women practise them regularly over their lifetime, many apparently perceiving PFXs as relevant only to the childbirth years. Implications for health professionals in addressing these gaps in women's knowledge and practises are discussed.     

生长激素、肝细胞生长因子和烟酰胺对人胎胰岛细胞的增殖作用

目的研究生长激素(GH)，肝细胞生长因子(HGF)和烟酰胺(NIC)对体外培养的人胎胰岛细胞的增殖作用及其交互作用。方法采用La(2^7)正交设计法在体外培养的人胎胰岛细胞的各组中分别加入不同浓度及组合的GH，HGF和NIC，培养48h后，收集各孔细胞，DTZ染色，计数。结果GH，HGF和NIC均起主要作用，HGF和NIC的交互作用不可忽视，最佳的生长因子组合及适配浓度为GH(100ng／ml)HGF(25ng／ml)NIC(100mmol／L)。结论GH，HGF和NIC均能促进体外培养的胰岛细胞的增殖，且组合GH(100ng／ml)HGF(25ng／ml)NIC(100mmol／L)的作用最大。     

女子篮球运动员大强度训练体液免疫机能的变化

目的　探讨大负荷强度训练与机体免疫机能的关系及其变化规律。方法　对 16名中国大学生篮球联赛(CUBA)女篮运动员进行了纵向跟踪监测 ,观测运动员在赛前大负荷强度训练期间血清IgA、IgM水平的变化。 结果　大负荷强度训练期末和期前血清IgA水平分别为 (1 5 0± 0 35 ) g/L和 (1 80± 0 4 0 ) g/L (P <0 0 5 ) ,与赛前 1周血清IgA水平 (1 97± 0 30 )g/L相比有显著性差异 (P <0 0 5 ) ;IgM分别为 (1 2 7± 0 33) g/L和 (1 5 2± 0 36 ) g/L (P <0 0 5 ) ,与赛前 1周血清IgM水平 (1 4 5± 0 30 ) g/L相比有显著性差异 (P <0 0 5 )。 结论　大负荷强度的运动训练可以导致机体体液免疫—IgA、IgM水平显著下降 ,抑制机体免疫功能     

正常月经周期中血清瘦素与雌激素的关系

目的 :探索健康妇女正常月经周期中血清瘦素与雌激素的关系 .方法 :①对 18例月经规则妇女 (2 8± 1)d ,用放射免疫法分别在其月经第 1,7,14和 2 1d测定血清瘦素及性激素 (FSH ,E2 ,PRO ,T) .②对 19例不孕妇女 ,在受精前用FSH 2 2 5IU·d-1治疗后第 3d、第 5d用放免法测定其血清瘦素及雌激素浓度 .结果 :①血清瘦素在月经周期中的生理性变化 ,月经第 1d ,血清瘦素为 (5 .4 9± 1.0 8) μg·L-1,随着卵泡的发育成熟 ,瘦素水平逐渐升高 ,14d达高峰 (9.2 8± 1.87) μg·L-1,其差异有显著性 (P <0 .0 1) .②用FSH治疗 3,5d ,血清雌激素浓度和瘦素水平 [(89.0 8± 18.0 7)ng·L-1,(10 .99± 1.94 ) μg·L-13rdday],[(12 6 .2 6± 19.79)ng·L-1,(14 .78± 2 .0 0 ) μg·L-15thday]均较治疗前 [(5 8.5 9± 6 .4 0 )ng·L-1,(5 .4 6± 1.16 ) μg·L-1]明显升高 (P <0 .0 1) .结论 :月经周期中血清瘦素和雌激素的变化一致 ,雌激素参与瘦素分泌的调节或瘦素的分泌调节与雌激素有关     

高原康胶囊对大批快速进入高原者血浆醛固酮、血管紧张素II及水负荷的影响及意义

目的 :了解高原康胶囊对快速进入高原者血浆醛固酮 (Aldosterone ,ALD)、血管紧张素II(AngiotensinII ,AII)及水负荷的影响及意义。方法 :将 80名由平原快速进入高原的新兵随机分为实验组 4 0名 ,对照组 4 0名 ,实验组于平原登机前开始给予口服高原康胶囊 ,连服 3日 ,对照组给予安慰剂 ,两组均于进入高原的前 1天及进入高原的第 3天午给予水负荷实验 ,并对饮水前血浆ALD、AII及饮水后 15 0min内各时间段的尿量及两组进入高原后 7天内急性高原病 (Acutehighal titudediseaes ,AHAD)的发病率进行对照比较。结果 :对照组进入高原后与平原相比血浆ALD、AII显著升高 ,水负荷实验 6 1min～ 15 0min各时间段的尿量及相应时间的总尿量与平原时相应各时间段的尿量及相应时间的总尿量相比则显著减少 (P <0 0 5～ 0 0 0 1) ,而实验组则无显著变化 (P >0 0 5 ) ;进入高原后实验组与对照组相比水负荷实验 6 1min～ 90min的尿量及 12 0min、15 0min的尿总量则显著多于对照组 (P <0 0 5 ) ;血浆ALD、AII及AHAD发病率则显著低于对照组 (P <0 0 5～ 0 0 0 1)。结论 :高原康胶囊能显著降低快速进入高原者的血浆ALD、AII ,通过对水负荷调节的影响减少机体的钠水潴留 ,从而防止快速进入高原者AHAD的发生 ,可用于大批快     

A sexually dimorphic ratio of orbitofrontal to amygdala volume is altered in schizophrenia.

BACKGROUND: Neuroanatomic sexual dimorphisms have been correlated with behavioral differences between healthy men and women. We have reported higher orbitofrontal cortex to amygdala ratio (OAR) in women than men. Although gender differences in schizophrenia are evident clinically and correlate with neuroanatomic measures, their relationship to OAR has not been examined. METHODS: Magnetic resonance imaging was performed in 31 neuroleptic-na?ve schizophrenic patients (16 men) and 80 healthy volunteers (34 men), aged less than 50 years. An automated tissue segmentation procedure was combined with expert-guided parcellation of orbitofrontal and amygdala volumes. RESULTS: Men with schizophrenia had increased OAR relative to healthy men, whereas women had decreased OAR. Increased OAR in men with schizophrenia reflected abnormally low amygdala volumes, whereas decreased OAR in women reflected abnormally low orbitofrontal volumes. Less severe negative symptoms were associated with increased OAR in men but with decreased OAR in women. In men, increased amygdala volume was associated with greater symptom severity, whereas in women higher volumes of both amygdala and orbitofrontal regions were associated with lesser severity of negative symptoms. CONCLUSIONS: These opposite OAR abnormalities, whereby men show feminization and women masculinization, suggest gender-mediated effects of the underlying neuropathologic processes. The correlations with symptom severity suggest that neuroanatomic abnormalities in OAR reflect compensatory brain changes.     

Acute effects of high-dose thyrotropin releasing hormone infusions in Alzheimer's disease

Thyrotropin releasing hormone (TRH) was administered intravenously to ten patients with Alzheimer's Disease (AD) in a high-dose paradigm, thought to maximize central nervous system effects and potentially produce facilitation of cholinergic function, a known property of the neuropeptide. Acute effects of TRH on behavioral, cognitive and physiologic measures were assessed after patients received 0.1 mg/kg TRH, 0.3 mg/kg TRH and placebo, the higher TRH dose and placebo being given in a randomized, double-blind fashion. Patients showed statistically significant increases in arousal and improvement in affect, as well as a modest improvement in semantic memory, all after receiving the higher TRH dose. Both TRH doses produced transient rises in systolic blood pressure, with no effect on diastolic blood pressure, heart rate or temperature. This study suggests that high-dose TRH can be safely administered to AD patients and is neurobehaviorally active; further studies are needed to determine the extent and mechanism of the cognitive and psychobiological properties of this peptide in AD and other neuropsychiatric disorders.