Fos Expression in the Rat Brain Following Vaginal-Cervical Stimulation by Mating and Manual Probing

Vaginal-cervical stimulation (VCS), provided by mating or manual probing, induces many reproductive behavioral and endocrine changes in female rats. These changes include an increase in lordosis duration, heat termination and pseudopregnancy. Electro-physiological and [¹⁴C]2-deoxy-D-glucose studies collectively show that neurons in the medial preoptic area, ventromedial hypothalamus and midbrain central gray respond to manual VCS. In the present study we immunocytochemically labeled brain sections for Fos, the protein product of the immediate early gene c-fos, to detect VCS-responsive neurons in hormone-primed animals receiving VCS by mating or manual probing. In Experiment 1, females receiving mounts and intromissions were compared to: 1) vaginally-masked females receiving mounts but no VCS, 2) females exposed to an intact anesthetized male or 3) females not exposed to males or the testing arena. Those animals receiving VCS showed a dramatic increase in the number of Fos-immunoreactive cells in the medial preoptic area, posterodorsal portion of the medial amygdala and bed nucleus of the stria terminalis, as well as the dorsomedial hypothalamus, ventromedial hypothalamus and midbrain central gray. These effects of VCS were confirmed in Experiment 2 in animals receiving manual vaginal-cervical probing. These findings extend previous electrophysiological and [¹⁴C]2-deoxy-D-glucose studies by providing evidence that additional brain areas respond to VCS by mating, as well as manual probing.     

Differential Regulation of RGS-2 by Constant and Oscillating PTH Concentrations

PTH has diverse effects on bone metabolism: anabolic when given intermittently, catabolic when given continuously. The cellular mechanisms underlying the varying target cell response are not clear yet. PTH induces RGS-2, a member of the Regulator of G-protein Signaling protein family, via cAMP/PKA, and inactivates PKC-mediated signaling. To investigate intracellular signaling pathways with different PTH concentration-time patterns, we treated UMR 106-01 osteoblast-like cells in a perfusion system. PTH was administered intermittently (4 min/h, 10⁻⁷ M) or continuously at an equivalent cumulative dose (6.6 × 10⁻⁹ M). cAMP was measured using radioimmunoassay, mRNA levels using real-time rtPCR and ribonuclease protection assay, and protein levels using Western immunoblotting. A single PTH pulse transiently increased cAMP levels by 2000% ± 1200%. In contrast to continuous PTH exposure, cAMP induction remained unchanged with intermittent PTH, ruling out desensitization of the PTH receptor. In continuously perfused cells, RGS-2 abundance was three to five times higher than in cells intermittently exposed to PTH for up to 12 h. MKP-1 and -3 were significantly less induced with pulsatile PTH; exposure-mode-dependent differences in MMP-13 and IGFBP-5 were small. Pulsatile but not continuous PTH administration prevents PTHrP receptor desensitization and accumulation of RGS-2 in osteoblasts, which should preserve PKC-dependent signaling.     

经皮双针囊内注射类固醇治疗小儿孤立性骨囊肿

目的探讨经皮双针囊内注射类固醇治疗小儿孤立性骨囊肿的疗效. 方法 1996年1月～2004年1月,对28例小儿孤立性骨囊肿,在X线透视下,将2根细的骨穿针或腰穿针分别自囊腔顶部和底部刺入骨囊肿内,抽去囊液,冲洗囊腔后注入类固醇. 结果 27例随访10～62个月,平均28个月,无并发症发生.根据Chigira等X线骨囊肿愈合评价标准,Ⅳ级20例,Ⅲ级5例,Ⅱ例1例,Ⅰ级1例,治愈率92.6%(25/27).25例骨囊腔愈合时间3～10个月,平均4.5个月. 结论经皮双针囊腔内注射类固醇适合于小儿孤立性骨囊肿,简单,安全,治愈率高.     

针刺对血浆骨动素,生长抑素及内皮素的影响及其意义

探讨针刺调整调整胃肠功能机理中胃肠激素的作用。方法：对４０名健康人对进行针刺胃肠相关穴位试验，随机分４组，即天枢组，巨虚组，非穴位刺激组及空白组。各针刺组均观察针刺前，中，后６次血浆ＭＴＬ，ＳＳ及ＥＴ水平的动态变化，空白组不行针刺，只观察同一时间蚋ＭＴＬ，ＳＳ及ＥＴ水平的自然波动。     

消化性溃疡的皮质醇分泌异常

采用放射免疫测定法研究了70例非应激性消化性溃疡患者的皮质醇分泌状态;并比较了患者与84例正常人的血清皮质醇浓度及其昼夜分泌节律。发现非应激性消化性溃疡血清皮质醇浓度明显高于健康对照组(P<0.01);然昼夜分泌节律相仿。结果提示,非应激性消化性溃疡有皮质醇分泌的明显异常。     

良、恶性脑膜瘤性激素受体和外源凝集素受体的检测

采用 ABC 免疫组化技术对82例脑膜瘤活检组织(良性脑膜瘤67例、恶性脑膜瘤15例)进行了三种性激素受体和12种 LR 的测定.结果证实脑膜瘤是性激素的靶组织,ER阳性率74.4%,PR 阳性率75.6%。AR 阳性率29.3%.ER 阳性率与性别有关,女性高于男性;PR 阳性率与组织类型有关,脑膜内皮型阳性率最高,过渡型居中,而纤维母细胞型及砂粒体型阳性率较低;AR 阳性率与组织分化程度有关,恶性脑膜瘤中 AR 阳性率高于良性脑膜瘤中 AR 阳性率.这些结果为进一步探讨性激素受体在脑膜瘤的生物学行为上所起的作用及对脑膜瘤实施内分泌治疗提供理论依据.12种 LR 中只有 PSA 受体在良性脑膜瘤中的阳性率高于恶性脑膜瘤,故这一结果可作为良、恶性脑膜瘤诊断的依据.三种性激素受体与 LR 染色结果经配对卡方检验证明无相关性,因此 LR 的测定不能代替性激素受体的测定.     

隐睾患儿血清FSH、LH、T水平及其临床意义

目的研究隐睾患儿血中促卵泡激素(FSH)、促黄体激素(LID和睾酮(T)激素水平变化,探讨其临床意义及在隐睾症发病中的作用。方法应用化学发光免疫技术检测42例隐睾症和23例斜疝(对照组)患儿血清FSH、LH、T水平。结果单侧隐睾症组和斜疝组之间血清FSH、LH和T水平无显著性差异(P＞0．05)；(2)双侧隐睾组血清FSH水平高于斜疝组,差别有统计学意义(P＜0．05)；单侧隐睾症组血清FSH高于斜疝组,低于双侧隐睾症组,差别无统计学意义(P＞0．05)。结论(1)血清中性激素LH和T水平的变化在隐睾发生中并不起主要作用；(2)血清FSH水平的升高可能反映睾丸功能损害严重程度。