大鼠心内神经节雄激素受体和免疫因子白介素-6的共存

目的：研究雄激素受体(AR)和免疫因子白介素-6(IL-6)的表达，证实它们在心内神经节共存的可能性。方法：采用免疫细胞化学双重标记技术。结果：切片上观察到3种细胞：①AR单标细胞，胞核呈棕褐色；②IL-6单标细胞，胞浆呈红色；③AR／IL-6双标细胞，胞核棕褐色，胞浆为红色。双标细胞占全部阳性标记细胞的50--60％。结论：AR和IL-6可共存于同一大鼠心内神经节细胞，从而首次于细胞水平为神经免疫内分泌网络在心脏的存在提供了直接的形态学证据。     

大鼠心内神经节雌激素受体和神经生长因子的共存

用免疫细胞化学双重标记技术研究雌激素受体(estrogen receptor,ER)和神经生长因子(NGF)的表达,证实它们在心内神经节共存的可能性。结果显示,在心内神经节可以观察到3种细胞:(1)ER单标细胞,胞核呈棕褐色;(2)NGF单标细胞,胞浆呈红色;(3)ER/NGF双标细胞,胞核棕褐色,胞浆为红色。双标细胞占全部阳性标记细胞的30%~40%。这些结果提示ER和NGF可共存于同一大鼠心内神经节细胞,提示雌激素和NGF在维持心内神经节的结构和功能方面存在复杂的交互作用。     

雌激素对大鼠心内神经节免疫因子白细胞介素-6表达的影响

目的 观察白介素-6(IL-6)在成年雌性大鼠、卵巢切除大鼠、卵巢切除后雌二醇替代大鼠心内神经节的表达及变化.方法 免疫组织化学方法.结果 各组大鼠心内神经节均存在IL-6阳性神经元,但卵巢切除组大鼠心内神经节IL-6阳性神经元明显增多,表达明显增强.结论 心房后壁心内神经节存在IL-6,并且受雌激素影响,提示雌二醇可能影响心内神经节IL-6的表达.     

雌激素对大鼠心内神经节免疫因子白细胞介素-6(IL-6)表达的影响

为了研究雌激素是否对大鼠心内神经节白细胞介素-6(IL-6)的表达有影响,本研究采用免疫组织化学方法观察了IL-6在成年雌性正常大鼠、卵巢切除大鼠、卵巢切除后雌二醇替代大鼠心内神经节的表达及变化。结果显示:各组大鼠心内神经节均存在IL-6阳性神经元,但卵巢切除组大鼠心内神经节IL-6阳性神经元明显增多,表达明显增强。以上结果提示,大鼠心内神经节内存在IL-6的表达,其表达受雌激素的影响。     

雌性大鼠心内神经节中雌激素受体及其mRNA的表达

目的 在雌激素受体蛋白及ERmRNA水平提供雌激素对心内神经节中神经元作用的形态学依据。方法 采用免疫组织化学及原位杂交技术。结果 在心内神经节部分神经元中，雌激素受体免疫反应及其mRNA原位杂交反应阳性。雌激素受体免疫反应沉淀物呈棕黄色，定位于胞核，雌激素受体mRNA免疫反应沉淀物呈棕黄色，定位于胞浆。结论 大鼠心内神经节中，部分神经元能合成雌激素受体蛋白，说明ER阳性神经元可以为雌激素提供结合位点，因此，这些神经元可能受到雌激素的影响。     

心肌缺血大鼠心内神经节白介素-6表达的变化

在心肌缺血和再灌注损伤中，白细胞系列在其病理改变中起重要的作用。IL-6是被誉为白细胞介素家庭“核心成员”的细胞因子，其与缺血性心脏病发病有密切的关系。研究表明心肌缺血缺氧时释放IL-6增加，并且心肌分泌的IL-6在心肌缺血再灌注损伤的心功能障碍中起着很重要的作用。心内神经系统的主要组成部分——心内神经节在心脏的功能调节中起着至关重要的中继作用，然而心内神经节在心肌急性缺血后能否迅速产生IL-6，国内外尚无报道。     

雌激素对大鼠心内神经节IL-6和NGF表达的影响

目的:观察白介素6(IL-6)和神经生长因子(NGF)在成年雌性大鼠、卵巢切除大鼠、卵巢切除后雌二醇替代大鼠心内神经节的表达及变化.方法:免疫组织化学方法.结果:各组大鼠心内神经节均存在IL-6阳性神经元和NGF阳性神经元,但卵巢切除组大鼠心内神经节IL-6阳性神经元明显增多,表达明显增强,而卵巢切除组大鼠心内神经节NGF阳性神经元的数量却明显减少,表达明显降低.结论:心房后壁心内神经节存在IL-6和NGF,并且受雌激素影响,提示雌二醇可能影响心内神经节IL-6和NGF的表达.     

白介素-6在大鼠心内神经节的表达

目的　观察大鼠心内神经节白介素 6(IL 6)阳性神经元的存在。方法　取 10只Winter大鼠心房后壁恒冷箱切片 ,用免疫组织化学方法观察白介素 6阳性神经元。结果　雌雄大鼠心房后壁心内神经节存在IL 6免疫阳性神经元 ,散在分布于心内神经节 ,细胞多为圆形或卵圆形 ,以小及中型为主。结论　IL 6在心内神经节的存在为神经免疫网络在心脏的存在提供了形态学依据     

大鼠心内神经节雄激素受体和神经生长因子的共存

目的：研究雄激素受体(AR)N神经生长因子(NGF)的表达,证实它们在心内神经节共存的可能性。方法：免疫细胞化学双重标记技术。结果：切片上观察到3种细胞：(1)AN单标细胞,胞核呈棕褐色;(2)NGF单标细胞,胞浆呈红色;(3)AR／NGF双标细胞,胞核棕褐色,胞浆为红色。双标细胞占全部阳性标记细胞的50％～60％。结论：AR和NGF可共存于同一大鼠心内神经节细胞,提示雄激素和NGF在维持心内神经节的结构和功能方面存在复杂的交互作用。     

大鼠心内神经节细胞雄激素受体的研究

有关雄激素受体在动物心肌组织的分布已有报道,但该受体在心内神经节细胞的配布尚未见报道.本实验取成年SD雄性大鼠的心房做冰冻切片,微波抗原修复后进行免疫组织化学染色(SP法,一抗为鼠抗雄激素受体1:200,博士德公司.二抗、三抗均为1:200,中山公司).光镜下观察,在心房的心内神经节发现雄激素受体阳性神经元,棕色的阳性反应颗粒定位于细胞核区,胞浆空白,亦见部分阳性神经元胞浆呈棕色淡染现象;阳性细胞数约占神经节细胞总数的60%;该类神经元胞体多数呈圆形或椭圆形,大、中、小型细胞均有发现.     

The effect of interleukin-6 and the interleukin-6 receptor on glucose transport in mouse skeletal muscle

Exercise results in an increase in interleukin-6 (IL-6), its receptor (IL-6R) and skeletal muscle glucose transport. Interleukin-6 has been found to have equivocal effects on glucose transport, with no studies, to our knowledge, investigating any potential role of IL-6R. In the present study, we hypothesized that a combined preparation of IL-6 and soluble IL-6R (sIL-6R) would stimulate glucose transport. Mouse soleus muscles were incubated with physiological and supraphysiological concentrations of IL-6 and a combination of IL-6 and sIL-6R. Total and phosphorylated AMP-activated protein kinase (AMPK) and Protein Kinase B (PKB/Akt) were also measured by Western blotting. Exposure to both physiological (80 pg ml⁻¹) and supraphysiological IL-6 (120 ng ml⁻¹) had no effect on glucose transport. At physiological levels, exposure to a combination of IL-6 and sIL-6R (32 ng ml⁻¹) resulted in a 1.4-fold increase ( P < 0.05) in basal glucose transport with no change to the phosphorylation of AMPK. Exposure to supraphysiological levels of IL-6 and sIL-6R (120 ng ml⁻¹) resulted in an approximately twofold increase ( P < 0.05) in basal glucose transport and an increase ( P < 0.05) in AMPK phosphorylation. No effect of IL-6 or sIL-6R was observed on insulin-stimulated glucose transport. These findings demonstrate that, while IL-6 alone does not stimulate glucose transport in mouse soleus muscle, when sIL-6R is introduced glucose transport is directly stimulated, partly through AMPK-dependent signalling.     

The clinical role of interleukin-6 and interleukin-6 soluble receptor in human follicular fluids

In order to investigate the role of interleukin-6 (IL-6) and interleukin-6 soluble receptor (sR) in human ovulation, we evaluated the concentrations in human follicular fluid and analyzed the correlation of IL-6 and IL-6 sR with oocyte maturation. The oocytes were obtained from the follicular fluid of 45 women undergoing in vitro fertilization and embryo transfer. The concentrations of IL-6 and IL-6 sR in follicular fluid were measured by ELISA. In addition, granulosa cells obtained from the follicular fluid were cultured and treated with forskolin and 12-o-tetradecanoylphorbol 13-acetate for 24–48 h. The concentration of IL-6 was significantly higher in the follicular fluid than in the serum (P<0.01). In contrast, the concentration of IL-6 sR was significantly lower in the follicular fluid than in the serum (P<0.001). The concentrations of IL-6 and IL-6 sR were significantly higher in the follicular fluid containing mature oocytes than in fluid containing immature oocytes (P<0.05). The production of IL-6 was markedly increased over the basal level after 24 h of treatment with forskolin(P<0.001) and 48 h of treatment (P<0.01) with cultured granulosa cells. Our data suggest that IL-6 and IL-6 sR may play an important role in follicular growth and development in human preovulatory processes. It is possible that IL-6 in particular may be regulated by cAMP. IL-6 and IL-6 sR might also be valuable biochemical markers in the evaluation of oocyte maturation. Received: 6 July 2002 / Accepted: 18 December 2002 Correspondence to Y. Kawano     

Effects of estrogen versus estrogen and progesterone on cortisol and interleukin-6

Objectives

The purpose of this study was to compare the effects of 3 months of estrogen replacement therapy, estrogen plus progesterone replacement therapy and a placebo, on the resting cortisol and interleukin-6 (IL-6) levels in post-menopausal women.

Methods

Forty-three women were randomised to one of three treatment arms: estradiol 2 mg/day (ERT), estradiol 2 mg/day plus medroxyprogesterone acetate 5 mg/day (HRT), or a placebo that was administered orally for 3 months.

Results

Cortisol levels showed a significant condition by intervention interaction. Post hoc tests showed that ERT significantly increased cortisol levels after treatment compared to baseline, while in the HRT group a trend toward increased cortisol was found. No changes were observed in IL-6 levels.

Conclusions

Estrogen administration elevated cortisol levels, but this effect may be moderated by progestins. IL-6 was not altered by ERT or HRT, future studies should consider the interaction of cortisol increases on change in IL-6 expression.     

雌激素与IL-6、IL-8在卵巢癌细胞中的调节作用

目的 探讨雌激素与IL-6、IL-8在卵巢癌细胞中的交互调节作用及作用机制.方法 选择兼有雌激素受体(estrogen receptor,ER)及IL-6、IL-8受体表达的卵巢癌细胞系CAOV-3和OVCAR-3作为研究模型,分别探讨17B-雌二醇(estradiol,E2)对IL-6、IL-8及其受体表达的作用以及IL-6、IL-8对EB表达及ER转录活性的作用.结果 一方面E2不仅可经NF-κB途径促进卵巢癌细胞IL-6、IL-8分泌,而且还对二者受体的表达具有一定的调节作用.E2诱导的促IL-6、IL-8分泌作用可被其受体阻断剂他莫昔芬(tamoxifen,Txf)完全阻断.另一方面在无雌激素的条件下,IL-6、IL-8能上调卵巢癌细胞Erα表达及下调ERB表达,且还能分别通过丝裂原活化蛋白激酶(MAPK)信号通路和Src活化增强卵巢癌细胞ER的转录活性,该作用可被Txf完全封闭.结论 雌激素与IL-6、IL-8两种细胞因子在卵巢癌细胞中交互调节,由此通过产生的放大信号通路促进卵巢癌的生长和发展.