雌激素孕激素及受体在肝门部胆管癌中的表达

目的探讨雌、孕激素(ER、PR)及其受体在肝门部胆管癌的发生中的作用。方法应用放射免疫法测定42例肝门部胆管癌患者血中的雌、孕激素水平；应用免疫组织化学法，检测其组织中ER及PR表达水平。结果42例肝门部胆管癌患者中，雌、孕激素高于正常者分别占73．8％和69．0％，ER及PR阳性表达率分别为66．7％、和64．3％。与对照组相比，雌、孕激素水平及受体表达具有明显差异。结论肝门部胆管癌患者中，多数雌、孕激素水平高，ER及PR表达率高。雌、孕激素及受体可能在肝门部胆管癌发生和发展过程中起重要作用。     

肿瘤坏死因子α及孕酮对异位子宫内膜间质细胞分泌基质金属蛋白酶-3的调节

目的 :探讨细胞因子、性激素与基质金属蛋白酶 (MMPs)在子宫内膜异位症(EMs)发病机制中的作用及相关性。方法 :以EMs患者 15例作研究组 ,分别取其在位与异位内膜 ,以非EMs患者 10例的正常内膜为对照组。原代培养子宫内膜间质细胞 ,在研究组和对照组内分别设置空白对照组、孕酮组与肿瘤坏死因子 α(TNF α)组。孕酮组分别加入孕酮 10 - 7mol/L、10 - 5mol/L ,各孵育 2 4h ;TNF α组中加入TNF α 10 0ng/L ,分别孵育2 4h、4 8h。ELISA法检测MMP 3含量。结果 :空白对照组MMP 3含量 ,异位组显著高于在位内膜组与对照组 (P <0 .0 1)。加入孕酮后各组MMP 3含量均呈下降趋势 ,异位组下降程度更为显著 (P <0 .0 1) ,高浓度孕酮具有更强的抑制作用 (P <0 .0 5 )。TNF α干扰后 ,各组MMP 3含量均升高 (P <0 .0 1) ,以异位组显著 (P <0 .0 1) ,不同作用时间对MMP 3含量的影响各组间无显著差异 (P >0 .0 5 )。结论 :EMs患者子宫内膜间质细胞分泌MMP 3较正常人高 ,异位病灶分泌能力更强。TNF α和孕酮对MMP 3的分泌分别有升调与降调的作用 ,二者可能通过此途径参与了EMs的发生发展过程。     

雌、孕激素受体与子宫内膜癌预后

目的总结子宫内膜癌患者病理分化、临床分期和浸润程度及受体状态与生存率的关系。方法对子宫内膜癌手术患者石蜡标本应用免疫组化LSAB法测定雌激素受体(ER)和孕激素受体(PR)。结果5年生存率随肿瘤分化程度低、肌层浸润深和临床分期晚而下降,ER和PR阳性率也呈下降趋势。受体阳性者5年生存率为86.5%。结论受体阳性可与组织分化、临床分期及肌层浸润一起作为观察预后指标。     

孕酮与A23187诱导顶体反应的研究

目的:研究孕酮与钙离子载体A23187诱导顶体反应(Acrosom e reaction,AR)特征。方法:10例健康生育男性精液,采用Percoll密度梯度分离法优选精子,采用FITC-PSA荧光染色法分析AR。结果:A23187诱导AR类型主要为III型和IV型,孕酮诱导AR类型主要为II型。精子获能4、6、8和16 h时,A23187和孕酮诱导AR率与获能0 h组相比较,均明显增加,两组比较差异均有显著性(P<0.05),同一获能时间A 23187和孕酮诱导的AR率比较,差异均无显著性(P>0.05)。A23187诱导15 m in、30 m in和60 m in时,AR率均明显高于诱导前AR率(P<0.005)。孕酮诱导15 m in时,AR率与诱导前组比较没有明显差异(P>0.05),孕酮诱导30 m in和60 m in时,AR率均明显高于诱导前组(P<0.005),同一诱导时间,A23187诱导AR率均明显高于孕酮诱导的AR率,差异均有显著性(P<0.05)。结论:孕酮可诱导精子发生AR,诱导AR类型主要为II型,可比A23187诱导的AR更接近生理过程。     

婴幼儿肾脏疾病肾组织病理类型的分布与临床

目的分析婴幼儿肾脏疾病病理类型的分布及其对诊断治疗的指导意义。 方法中南大学湘雅二院于1996 01—2005 09采用快速经皮肾活检术，对73例临床诊断为10种肾脏疾病的婴幼儿进行肾组织病理检查。将穿刺取得的每份组织标本分成3部分，按常规方法对所有标本均分别进行光镜、电镜及免疫荧光检查，标本均做HE、PAS、PASM、Masson染色，均应用免疫荧光检测肾组织中IgG、IgM、IgA、C3、C4、C1q、Fb，部分病例根据血化验乙肝抗原阳性者加做免疫荧光，检测肾组织中的HBsAg、HBcAg。 结果肾活检成功率为100%；最常见的病理类型为系膜增生性肾炎(51/73例，占69.9%)；临床表现类似的疾病病理类型不同，同一病理类型的疾病，临床表现可以多样。 结论肾活检病理诊断对婴幼儿肾脏疾病的诊断、治疗、估计预后均有重要价值。电镜在婴幼儿肾病理检查中起到不可忽视的作用。     

超促排卵周期胚胎移植日血清孕酮/雌二醇比值对胚胎着床的影响

目的：探讨超促排印周期胚胎移植日血清孕酮／雌二醇（P／E2）比值对子宫内膜容受性的影响。方法：将96例体外受精-胚胎移植患者按胚胎移植日（ET）血清P／E2比值分为5组，对其实验室结果和临床结局进行比较。结果：5组患者的平均年龄、ET日内膜厚度、受精率、印裂率、可移植胚胎数及移植胚胎数均无差异（P〉0．05）。组1的取卵数最多，妊娠率低；组5的取卵数最少，无1例妊娠。而组3（P／E2为100～150）获得显著高于其他组的妊娠率和单胚种植率（P〈0．05）。结论：恰当的P／E2比值可提高子宫内膜的容受性，在促排卵周期测定ET日的P／E2比值对预测妊娠成功与否有参考作用。     

Micelles Based on Polyvinyl Alcohol Substituted with Oleic Acid for Targeting of Lipophilic Drugs

Polymeric micelles based on polyvinyl alcohol substituted with oleic acid were used as vehicles for progesterone and folic acid. The ability of this amphiphilic polymer to entrap lipophilic drugs and to generate stable micelles in aqueous neutral medium makes it a good candidate for drug delivery. The release of the loaded drugs in acidic environments represents another important property of these systems. Size of micelles, their stability, and their drug-loading capacity were evaluated, as well as the in vitro controlled-release profiles at pH 7.4 and 5.5.     

Sex,hormones, and stress: How they impact development and function of the carotid bodies and related reflexes

Progesterone and corticosterone are key modulators of the respiratory control system. While progesterone is widely recognized as an important respiratory stimulant in adult and newborn animals, much remains to be described regarding the underlying mechanisms. We review the potential implication of nuclear and membrane progesterone receptors in adults and in newborns. This raises intriguing questions regarding the contribution of progesterone as a protective factor against some respiratory control disorders during early life. We then discuss our current understanding of the central integration of stressful stimuli and the responses they elicit. The fact that this system interacts with the respiratory control system, either because both share some common neural pathways in the brainstem and hypothalamus, or because corticosterone directly modulates the function of the respiratory control network, is a fascinating field of research that has emerged over the past few years. Finally, we review the short- and long-term consequences of disruption of stress circuitry during postnatal development on these systems.     

Oral administration of leaf extracts of Momordica charantia affect reproductive hormones of adult female Wistar rats

ObjectiveTo determine the effect of graded doses of aqueous leaf extracts of Momordica charantia on fertility hormones of female albino rats.MethodsTwenty adult, healthy, female Wistar rats were divided into four groups: low dose (LD), moderate dose (MD) and high dose (HD) groups which received 12.5 g, 25.0 g, 50.0 g of the leaf extract respectively and control group that was given with water ad libatum.ResultEstrogen levels reduced by 6.40 nmol/L, 10.80 nmol/L and 28.00 nmol/L in the LD, MD and HD groups respectively while plasma progesterone of rats in the LD, MD and HD groups reduced by 24.20 nmol/L, 40.8 nmol/L and 59.20 nmol/L respectively.ConclusionOur study has shown that the antifertility effect of Momordica charantia is achieved in a dose dependent manner. Hence, cautious use of such medication should be advocated especially when managing couples for infertility.