细胞增殖核抗原在大鼠垂体泌乳素腺瘤中的表达及其意义

目的　研究细胞增殖核抗原 (PCNA)在雌激素诱导的SD大鼠垂体泌乳素腺瘤中的表达及其意义。方法　 2 4只雄性SD大鼠随机分为雌激素组及对照组 ,雌激素组大鼠局麻后 ,分别于大鼠背部植入长 1cm ,直径 1 5mm的硅胶管 (药泵 ) ,管中预装 10mg的 17 β雌二醇 ,而对照组用同样的方法植入同样大小未装药的硅胶管。随后饲养 4个月 ,断头取出垂体 ,称重 ,同时采血进行血清泌乳素 (PRL)测定 ,垂体石蜡切片进行PCNA检测。结果　雌激素组大鼠重量皆大于 30mg ,明显高于对照组 (P <0 0 1) ,PRL明显高于对照组 (P <0 0 1) ,PCNA表达阳性。而对照组垂体皆小于10mg ,PCNA阴性表达。结论　PCNA是可取代PRL检测来判定垂体泌乳素腺瘤动物模型建立的一个指标。     

神经肽y与垂体腺瘤发病机制的关系

目的：探讨雌激素诱发大鼠垂体腺瘤及神经肽y（NPy）与垂体腺瘤发病机制的关系。方法：将实验动物分为2组各30只。给药组雌性Wistar-Furth大鼠腹腔注射苯甲酸雌二醇，诱发垂体泌乳素细胞腺瘤；对照组大鼠腹腔注射等量生理盐水。而后观察2组大鼠脑组织和血浆中的神经肽y含量。结果：给药组Wistar-Furth大鼠产生垂体腺瘤，且血浆泌乳素浓度、NPy浓度和垂体及下丘脑NPy含量均明显升高。结论：NPy可能在垂体肿瘤的发生、发展过程中发挥着重要的作用。     

胶质细胞生长因子与泌乳素垂体瘤的临床相关性研究

目的：探讨胶质细胞生长因子（GGF）与泌乳素垂体瘤临床的相关性，并分析其预测临床复发的价值。方法研究对象为本院收治的71例泌乳素垂体瘤（PRL ）患者，采用免疫组织化学检测GGF在肿瘤组织中的表达情况，分析GGF表达水平与PRL水平、肿瘤大小、微血管密度（MVD）及肿瘤侵袭性的关系，并进一步分析GGF表达水平与泌乳素垂体腺瘤复发的临床联系，最后采用多因素Cox生存风险模型寻求可能的预后影响因素。结果不同PRL水平、肿瘤大小、M VD及肿瘤侵袭性的患者其GGF表达水平也具有明显差异，且差异有统计学意义（P＜0．05）；3年无复发生存分析显示，GGF高表达组患者的3年无复发生存率（71．4％）和生存期（28．0±2．2）个月均明显低于低表达GGF组88．9％和（32．8±1．5）个月，但差异无统计学意义（P＞0．05）；多因素Cox生存风险模型分析提示GGF可能是预测泌乳素垂体瘤患者复发预后的独立生物学指标（ P＜0．05）。结论 GGF与泌乳素垂体瘤患者临床基线资料密切相关，且可能成为预测患者复发预后的重要生物学指标。     

回乳抑增方抗泌乳素腺瘤的药效及作用机制研究

目的：研究中药复方回乳抑增方抗泌乳素腺瘤的药效及作用机制。方法：建立SD雌性大鼠泌乳素腺瘤模型,大鼠随机分为7组,分别为正常组、模型组各14只,手术对照组、溴隐亭阳性药组、回乳抑增方高剂量组、回乳抑增方中剂量组、回乳抑增方低剂量组各6只。除正常组和手术对照组外,其他5组模型大鼠灌胃给予相应药物30 d,每天1次。应用基因芯片筛选正常组大鼠和泌乳素腺瘤模型组大鼠垂体组织基因间的差异。运用Western Blot测定各组大鼠垂体组织中泌乳素（PRL）、胞内磷脂酰肌醇激酶（PI3K）、蛋白激酶B（AKT）和哺乳动物雷帕霉素靶蛋白（mTOR）蛋白含量。结果：大鼠泌乳素腺瘤模型建立成功。与正常组相比,模型组大鼠垂体组织的PI3K基因表达显著。与正常组相比,模型组大鼠垂体组织中PRL、PI3K、AKT和mTOR表达显著升高（^**P<0.01）,而与模型组相比,高、中和低剂量的回乳抑增方给药组大鼠垂体组织中PRL、PI3K、AKT和mTOR表达显著降低（^##P<0.01）。结论：回乳抑增方可显著抑制泌乳素腺瘤的增长和泌乳素的过度分泌,作用机制与调控PI3K/AKT/mTOR信号通路有关。     

罗哌卡因联合芬太尼用于无痛分娩对产妇泌乳的影响及护理体会

目的 观察罗哌卡因联合芬太尼进行无痛分娩对产妇泌乳的影响,并探讨其护理体会.方法 选取医院收治的120例孕妇为研究对象,其中74例进行分娩镇痛的产妇为观察组,46例未进行分娩镇痛的产妇为对照组,比较两组产后泌乳素浓度、泌乳始动时间及新生儿体重.结果 两组产妇分娩前血清泌乳素水平比较,差异无统计学意义（t=0.63,P＞0.05）.观察组产妇分娩结束时血清泌乳素为（271.3±67.4） ng/mL,产后24 h为（321.8±69.2）ng/mL,产后48 h为（369.2±78.9）ng/mL,均高于对照组的（223.1±47.3）ng/mL,（281.8±53.6）ng/mL和（339.6±58.0）ng/mL,差异有统计学意义（t=4.24,t=3.34,t =2.20,P＜0.05）.观察组产妇初乳时间为（25.1±5.9）h,早于对照组的（39.8±4.3）h,差异有统计学意义（t=14.64,P＜0.05）.观察组新生儿出生时体重为（3 319.2±232.2）g,出生24 h为（3 123.1±147.8）g,出生48 h为（3 081.8±153.6）g,高于对照组的（3 314.6±242.5）g,（3 171.3±167.2）g和（3 021.8±129.2）g,但差异无统计学意义（t=0.10,t=1.60,=2.30,P＞0.05）.结论 罗哌卡因联合芬太尼硬膜外阻滞应用于无痛分娩,可减轻产妇疼痛,提高产妇血清泌乳素水平,使初乳时间提前.而且产后应执行合适的护理措施促进乳汁分泌,保障母乳喂养.     

磁共振检查高泌乳素血症诊断价值探讨

目的探讨磁共振影像学表现在高泌乳素血症诊断中的价值及意义。方法通过对292例高泌乳素血症患者资料进行回顾性分析,分别对她们血清泌乳素水平及磁共振影像学表现进行亚组分层,并应用卡方检验、t检验对患者症状、血清泌乳素水平及颅脑磁共振表现进行统计分析,来分析上述指标之间的关系。结果 292例患者血清泌乳素水平范围在31～338ng/ml之间,61%的高泌乳素血症患者MRI表现正常,22.8%合并垂体微腺瘤,5.1%合并垂体大腺瘤,或/和其它畸形,5.2%合并空蝶鞍、垂体囊肿等其它垂体畸形或混合畸形,另外5.3%合并其它部位或颅神经病变。所有合并垂体微腺瘤患者血清泌乳素水平均小于50ng/ml,其中2/3的微腺瘤血清泌乳素只是轻微升高。垂体微腺瘤及大腺瘤血清泌乳素水平分别为68.5ng/ml和79.0ng/ml,但是t检验并未发现显著性差异。结论在高泌乳素血症人群中,MRI阳性表现患者不乏少数,所以对高泌乳素血症患者行MRI检查是有意义的,但是血清PRL水平对MRI阳性表现并没有预测意义。对于无症状高泌乳素血症患者,MRI阳性表现较少,行MRI检查,意义不大。     

海洛因依赖者血清中辅助性T细胞因子的表达水平及其临床意义

目的研究海洛因依赖者血清中辅助性T细胞1（Th1）／Th2类细胞因子的表达水平,进而对海洛因依赖者的免疫状况进行评价。方法选择2012年7月至2013年6月于温州市三蝉强制隔离戒毒所收容的50例海洛因依赖者作为海洛因依赖组,选择同期于我院行健康体检的50例正常人作为正常对照组。采取放射免疫法检测2组受试对象血清中白细胞介素2（IL-2）、γ干扰素（IFN-γ）、肿瘤坏死因子α（TNF-α）、TNF-β、IL-4、IL-6、IL-8、IL-10和IL-17的表达水平。结果海洛因依赖组血清中Thl细胞因子IL-2、IFN-γTNF—α和TNF-β水平均明显低于正常对照组[分别为（1184-38）ng／L比（249±76）ng/L、（2634±78）ng/L比（492±154）ng／L、（103±22）ng/L比（121±23）ng／L、（72±26）ng／L比（118±34）ng／L],差异均有统计学意义（t=3．154,t=4．518,t=2．459,t=3．089,均P〈0．05）;Th2细胞因子IL-4、IL-6、IL-8、IL-10和IL—17的表达水平均明显高于正常对照组[分别为（252±72）ng/L比（124±32）ng／L、（4．4±1．6）ng/L比（2．8士1．0）ng／L、（409±112）ng／L比（214±67）ng／L、（12．14±3．4）ng／L比（8．2±2．0）ng/L、（1644±50）ng／L比（954-28）ng／L],差异均有统计学意义（t=3．157,f=2．589,t=3．872,t=2．711,t=3．255,均P〈0．05）。结论海洛因依赖者血清中Th1／Th2类细胞因子水平较正常对照严重失衡,提示其免疫功能较差,易获得外界感染,需给予足够重视。     

重症急性胰腺炎时胰腺组织细胞凋亡与病变严重程度的关系

目的探讨实验性重症急性胰腺炎（SAP）胰腺组织细胞凋亡与胰腺病变严重程度的关系。方法28只SD大鼠随机分为两组：对照组7只、SAP组21只。牛磺胆酸钠诱导SD大鼠SAP模型，于造模成功后3、6、12h分别处死7只。检测血清淀粉酶浓度、胰腺组织学损伤评分（HI），TUNEL法检测胰腺组织细胞凋亡指数（AI）、免疫组化法检测Fas／FasL表达。结果12h时SAP组大鼠死亡1只，对照组无死亡。SAP组的血清淀粉酶浓度（U／L）在3h．6h、12h时分别为3904±737、6133±882、10606±2641（对照组1518±562，P=0．000），相应时点的H1分别是4．85±1．35、8．14±1．34、11．00±1．26（对照组为1．57±0．79，P=0．000），各组间差异有显著统计学意义。对应时间点的胰腺AI分别是1．200±0．497、0．886±0．389和0．700±0．352（对照组为1．028±0．403，），12h与3h的差异有统计学意义（P=0．047）。Fas的表达强度分别为108．00±10．02、93．14±8．17、73．33±9．52（对照组为102．00±13．24，P＝0．001），FasL分别为83．86±31．13、79．57±9．78、73．33±15．79（对照组为88．57±7．68，P=0．023）。SAP组AI与HI（r=-0．510，P=0．022）、AI与AMY（r=-0．471，P：0．036）分别呈负相关关系，Fas与AI（r=0．572，P=0．008）呈正相关关系。结论在实验性SAP大鼠中，胰腺组织细胞凋亡指数与胰腺组织学损伤程度呈负相关，诱导凋亡可能减轻胰腺炎的进展有关。     

肿瘤标志物CA153、CA125、CEA和SF联合检测对乳腺癌的诊断价值

目的探讨肿瘤标志物CA153、CA125、CEA和SF联合检测在乳腺癌中的临床应用价值。方法利用化学发光免疫方法检测60例乳腺良性疾病（乳腺良性疾病组）和4JD例健康体检者（对照组）以及60例乳腺癌患（乳腺癌组）治疗前后血清CA15．3、CA125,CEA和SF的水平,并进行分析。结果乳腺癌组治疗前CA153、CA125、CEA、SF水平[（52．8±21．3）u／ml、（44．2±20.1）ng／ml、（8．9±5．2）ng／ml、（350．5±113．8）w／ml]均显著高于乳腺良性疾病组[（17．3±8．8）u／ml、（15．6±8．5）u／ml、（2．0±0．8）u／ml、（1220．7±46．91）ng／ml]（t=2．671,t=2．684,t=2．898,t=2．844,P均〈0．01）;乳腺癌组患者血清CA153、CA125、CEA和SF治疗前的水平（同上）明显高于治疗后[（25．5±3．7）u／ml、（15．0±8．4）u／ml、（4.6±3．3）ng／m1、（98．5±58．6）ng/ml]（t=2．210,t=2．165,t=2．224,t=2．234,P均〈0．05）;乳腺良性疾病组与正常对照组差异无统计学意义（t=1．644,t=1．757,t=1．67,t=1．741,P均〉0．05）;乳腺癌组CA153＋CA125＋CEA＋SF四项联检阳性率53．3％低于CA153（56．7％）、CA125（58．3％）、CEA（63．3％）、SF（68．3％）（x^2=2．52,x^2=2．652,P〉0．05;x^2=3．85,x^2=3.90,x^2=3．98,P〈0．05）。结论血清CA15—3、CA125、CEA、SF联合检测可提高乳腺癌的阳性检出率,对乳腺癌的早期诊断、疗效监测以及预后判断均有重要意义。     

TGF—β1和Smad3在子宫肌瘤组织中的表达及意义

目的检测转化生长因子β1（transforming growth factor β1,TGF—β1）和Smad3在子宫肌瘤组织中的表达,探讨两者的相关性。方法采用RT—PCR法分别检测子宫肌瘤组织以及邻近正常子宫平滑肌组织中TGF—β1和Smad3的mRNA表达情况。结果①TGF—β1在子宫肌瘤组织和正常子宫平滑肌组织中都有表达,且肌瘤组中TGF—β1的mRNA的表达（1．51±0．34）明显高于正常组（1．29±0．35）,差异有统计学意义（t=5．73,P=0．000）;②Smad3在肌瘤组和正常组都有表达,且肌瘤组中Smad3表达（1．36±0．20）明显高于正常组（1．13±0．27）,差异有统计学意义（t=7．34,P=0．000）;③肌瘤组中TGF—β1和Smad3的mRNA的表达呈正相关（rs=0．769,P=0．000）。结论TGF—β1能诱导子宫肌瘤纤维化,信号蛋白Smad3在其中发挥了重要作用。     

Chronic sustained stress increases levels of anterior pituitary prolactin mRNA

Our laboratory is investigating the effects of chronic stress on physiological, endocrine and behavioral measures, in order to elucidate the neuronal substrates for the pathophysiological consequences of stress in humans. In these studies, we have employed a rodent model of sustained stress in which rats are exposed to around-the-clock intermittent footshock that can be avoided or escaped by rats in the controllable stress group, but not by rats in the uncontrollable stress group. Each rat in the uncontrollable stress group is paired (yoked) to a rat in the controllable stress group such that the controllable stress group rat avoids or escapes shock for both rats. A third group of rats receives no shock (controls). We have previously reported that in male rats, plasma prolactin levels were elevated after 3 days of stress in both stress groups. In the present experiments we determined whether the increases in plasma prolactin were correlated with increases in anterior pituitary prolactin mRNA. In addition, we measured hormones and mRNA at three time points and we examined these responses in female as well as male rats. Adult male and female Sprague-Dawley rats were exposed to chronic stress for 1, 3 or 14 days. In unstressed control rats, levels of anterior pituitary prolactin mRNA were fivefold higher in female as compared to male rats. However, stress increased levels of anterior pituitary prolactin mRNA over baseline in both genders. After 1 day of stress, anterior pituitary prolactin mRNA levels increased in male and female rats belonging to both stress groups, with no significant difference seen between the uncontrollable vs. controllable stress groups. After 3 days of stress, anterior pituitary prolactin mRNA levels were even more elevated, and rats in the uncontrollable stress group had higher anterior pituitary prolactin mRNA levels than those in the controllable stress group. After 14 days of stress, there were no significant differences in control and stressed groups with respect to anterior pituitary prolactin mRNA. These data suggest that chronic sustained stress increases the synthesis of anterior pituitary prolactin mRNA during the first days of stress, and that levels return to prestress values sometime between 3 and 14 days of stress.     

Regulation of hepatic cortisol sulfotransferase in rats by pituitary growth hormone

Cytosolic sulfating activities of 4-pregnen-11 beta, 17 alpha, 21-triol-3,20-dione (cortisol) to the 21-sulfate were 4 to 5 times higher in livers of female than male adult rats. The activity was decreased by administration of testosterone propionate (TP) to ovariectomized, but not to intact, female rats. In male rats, the rate of cortisol sulfation was elevated by neonatal castration and was restored in part by the administration of TP to the castrated rats. In addition, the sulfating activity in adult male rats was increased by the treatment with estradiol benzoate. Hypophysectomy almost completely decreased cytosolic cortisol-sulfating activity in male rats. The activity in hypophysectomized male rats was not increased by the treatment with hydrocortisone, TP, estradiol benzoate, or somatomedin C but was restored by the intermittent injection of human growth hormone (hGH). Further, the continuous infusion of hGH, to mimic the female secretory pattern, increased more efficiently the rate of cortisol sulfation. Hypophysectomy of female rats also decreased, but not completely, the sulfating activity. Treatment of female hypophysectomized rats intermittently with hGH had no appreciable effect, but the continuous infusion increased the activity effectively. The involvement of pituitary growth hormone in the hepatic cortisol sulfation was also supported by the experiment using neonatally glutamate-treated rats and by the observation of developmental changes in the cortisol-sulfating activity. These results indicate that pituitary growth hormone is one of the major factors regulating hepatic levels of cortisol sulfation in rats and that the higher activity in the female than the male is due mainly to the difference in the secretory pattern of growth hormone in the adult animals.     

疏乳消块丸对大鼠乳腺增生的治疗作用及其机制

目的:观察疏乳消块丸对大鼠乳腺增生病的治疗作用,并对其作用机制进行探讨。方法:采用肌内注射雌-孕激素联合诱导制备乳腺增生模型大鼠,灌胃给予疏乳消块丸30 d后,观察各组药物对乳腺增生大鼠乳腺组织病理学的改变及各组大鼠乳头形态学变化,用放射免疫方法测定各组大鼠血清雌二醇(E2)、黄体酮(P)的含量,并计算脏器指数。结果:疏乳消块丸能明显减小乳腺增生大鼠乳头高度及乳房直径,抑制大鼠乳腺增生程度,还可明显降低大鼠血清雌二醇水平、增加孕酮水平。结论:疏乳消块丸对大鼠乳腺增生病有良好的治疗作用,其机制与调节乳腺增生大鼠血清中性激素水平有关。     

Neoplastic and nonneoplastic lesions in aging female rats with special reference to the functional morphology of the hyperplastic and neoplastic changes in the pituitary gland

Hyperplastic and neoplastic lesions in the mammary glands, uterus, adrenals and pituitary glands of untreated aging female rats were evaluated. The most common lesions in the uterus, mammary glands and adrenal cortex were endometrial stromal polyps, fibroadenomas and nodular hyperplasias, respectively. A few malignant neoplasias were found in the uterus and mammary glands.The pituitary glands of the senile untreated rats had diffuse hyperplasia and/or hypertrophy of PRL, STH and ACTH cells. In 25 out of 52 rats (48%), pituitary adenomas were detected. Histological examination showed that the adenomas were made up of immature cells, a combination of ACTH and immature cells, prolactin cells, or intermediate zone cells.The cytological changes in the hypophyseal cell types in the senile rats were usually accompanied by spontaneous neoplasias of the mammary glands. The possible role of hypophyseal hormones in the neoplasias of the mammary glands and the adrenal cortex is discussed.The present study has also shown that the variation in the reproductive state of the aging female rats, as assessed from ovarian morphology, had no striking effect on the incidence or the severity of the hyperplastic/neoplastic lesions in the organs examined.     

BCPT对慢性应激抑郁大鼠下丘脑、垂体AVP含量及下丘脑AVP mRNA表达的影响

目的观察一种拟青霉代谢产物提取物(BCPT)对慢性应激抑郁大鼠行为,下丘脑、垂体精氨酸加压素(AVP)含量及下丘脑AVP mRNA表达的影响。方法采用慢性不可预见性应激造成大鼠抑郁模型,运用开野(Open-F ield)法测定动物行为,用放射免疫分析方法(R IA)测定慢性应激抑郁模型大鼠下丘脑、垂体AVP含量,用半定量逆转录-聚合酶链反应(RT-PCR)方法,测定其下丘脑AVP mRNA的表达。结果BCPT可提高慢性应激大鼠的水平和垂直活动数,降低动物下丘脑、垂体AVP含量,下调下丘脑AVP mRNA表达。结论BCPT的抗抑郁作用可能与降低慢性应激大鼠下丘脑、垂体AVP含量,下调下丘脑AVP mRNA表达有关。     

玫瑰红芪当归水煎剂对围绝经期大鼠IL-2含量及Sparc表达的影响

目的观察玫瑰红芪当归水煎剂对围绝经期大鼠IL-2含量及Sparc表达变化的影响。方法通过手术切除Wistar♀大鼠双侧卵巢复制围绝经期综合征模型。造模后第7天用ELISA法检测血清雌二醇(estradiol,E2)含量确定造模是否成功,于造模成功后第2周将切除卵巢的大鼠随机分为模型组,玫瑰红芪当归水煎剂低、中、高剂量组(1.4,2.8,5.6 g·kg^-1)和戊酸雌二醇片组(0.09 mg·kg^-1),每组10只。另设10只Wistar♀大鼠作为正常组。末次给药24 h后,腹主动脉采血处死大鼠后,称取各组大鼠体质量,并计算其子宫指数及胸脾指数,HE染色法观察各组大鼠子宫组织形态学变化,ELISA法测定各组大鼠血清E2和白细胞介素-2(interleukin-2,IL-2)的含量,实时荧光定量PCR法检测各组大鼠富含半胱氨酸的酸性分泌蛋白(secreted protein acidic and rich in cysteine,Sparc)的基因表达,免疫组化法观察各组大鼠雌激素受体α(estradiol receptorα,ERα)的蛋白表达。结果与模型组相比,玫瑰红芪当归水煎剂中、高剂量组和戊酸雌二醇片组能明显降低大鼠的体质量,明显升高大鼠的子宫指数、胸腺指数、脾脏指数、Sparc的基因表达和ERα的蛋白表达(P<0.05);玫瑰红芪当归水煎剂各治疗组和戊酸雌二醇片组能明显升高模型组大鼠E2含量和IL-2的含量(P<0.05)。HE染色发现,玫瑰红芪当归水煎剂高剂量组和戊酸雌二醇片组子宫黏膜层出现腺体,单层柱状上皮细胞排列整齐。结论玫瑰红芪当归水煎剂治疗围绝经期综合征与调节机体内分泌-免疫系统有关,为临床应用和新药开发提供实验依据。     

Perinatal exposure to androgen excess and the effects on the rat uterine estradiol responsiveness

Androgen exposure during sexual development induces alterations in steroidal target tissues. The objective of this study was to evaluate the uterine responsiveness to estradiol after perinatal androgenization. Pregnant Wistar rats were exposed to corn oil or testosterone propionate at 0.05, 0.1, or 0.2 mg/kg from gestational day 12 until postnatal day 21. Female offspring was challenged with estradiol (E₂) after weaning (0.4 mg/kg) and at adulthood (10 or 100 µg/day), when the pituitary response was also evaluated. At adulthood, control and 0.05 mg/kg groups presented a uterine weight increment when exposed to 100 µg/day of E₂, 0.1 mg/kg group only responded to 10 µg/day of E₂, and the 0.2 mg/kg group showed increased uterine weight at both doses. The pituitary weight was similarly increased after estradiol stimulation in all experimental groups. In conclusion, testosterone propionate exposure induced an abnormal stimulation of uterine tissue growth by estrogen stimulus without affecting pituitary response. More studies are needed to clarify whether these alterations are capable of impairing the reproductive capacity of the female tract. © 2015 Wiley Periodicals, Inc. Environ Toxicol 31: 1460–1468, 2016.     

Relation between dopaminergic control of pituitary lactotroph function and deceleration of age-related changes in serum prolactin of diet-restricted rats

Pituitary lactotroph function has been examined in diet-restricted (6 hr/day) male and female rats and compared with that in animals fed ad lib. After 12 months the age-related increase in serum prolactin concentration was significantly attenuated in diet-restricted female rats. Similar effects were not observed in male rats. Isolated superfused anterior pituitary glands removed from rats on both feeding regimens at 12 or 18 months and challenged with dopamine in vitro (5 microM) did not show differential prolactin secretion. No significant differences were observed in serum prolactin secretion in vivo after administration of bromocriptine (3 mg/kg body weight, sc) or haloperidol (1.75 mg/kg body weight, ip). These results do not support an altered dopamine receptor function in the anterior pituitary lactotrophs. In contrast, central dopamine receptor function in rats 12 months of age was altered by dietary restriction, since the frequency of cataleptic responses to haloperidol injection (2 mg/kg body weight, ip) was significantly depressed in the test animals.     

一种白僵菌代谢产物BCEF0083对慢性应激抑郁大鼠下丘脑、垂体精氨酸加压素含量及海马GR mRNA表达的影响

目的：研究一种白僵菌代谢产物(BCEF0083)对实验性慢性应激抑郁大鼠下丘脑、垂体精氨酸加压素(AVP)含量及海马糖皮质激素受体mRNA(GRmRNA)表达的影响。方法：采用慢性不可预见性应激法造成大鼠抑郁模型，用放射免疫分析法测定抑郁模型大鼠下丘脑、垂体AVP含量，采用逆转录-聚合酶链反应(RT-PCR)法测定海马GR mRNA表达。 结果：BCEF0083可降低慢性应激抑郁大鼠下丘脑、垂体AVP含量，上调海马GR mRNA表达。结论：BCEF0083的抗抑郁作用可能与其降低慢性应激大鼠下丘脑、垂体AVP含量及上调海马GR mRNA表达有关。