GPR30在17β雌二醇减轻氯胺酮致发育期大鼠远期认知功能障碍中的作用

目的评价G蛋白偶联受体30(GPR30)在17β雌二醇减轻氯胺酮致发育期大鼠远期认知功能障碍中的作用。方法 7日龄健康雄性SD大鼠30只, 体重11～18 g, 采用随机数字表法分为5组(n=6):对照组(C组)、氯胺酮组(K组)、17β雌二醇+氯胺酮组(EK组)、GPR30激动剂G1+氯胺酮组(G1K组)和GPR30抑制剂G15+17β雌二醇+氯胺酮组(G15EK组)。K组腹腔注射氯胺酮75 mg/kg, EK组皮下注射17β雌二醇600 μg/kg, 腹腔注射氯胺酮75 mg/kg, G1K组皮下注射G1 200 μg/kg和腹腔注射氯胺酮75 mg/kg, G15EK组皮下注射G15 300 μg/kg和17β雌二醇600 μg/kg以及腹腔注射氯胺酮75 mg/kg, C组腹腔注射等容量生理盐水。每隔24 h注射1次, 连续注射3 d。所有大鼠饲养至60日龄, 采用Morris水迷宫实验检测大鼠认知功能。于水迷宫实验结束后处死大鼠取海马, 采用ELISA法检测海马乙酰胆碱酯酶(AChE)和乙酰胆碱(ACh)的含量。结果与C组比较, K组大鼠第3～5天逃避潜伏期延长, 穿越平台次...     

大鼠丙泊酚精神依赖形成的机制：腺苷A2A受体-神经递质-ERK通路

目的探讨大鼠丙泊酚精神依赖形成的机制与腺苷A2A受体-神经递质-细胞外信号调节激酶(ERK)通路的关系。方法健康雄性SD大鼠48只, 采用间断腹腔注射丙泊酚40 mg/kg, 连续14 d的方法建立丙泊酚依赖模型。采用随机数字表法将大鼠分为6组(n=8):中枢对照组(c-C组)、中枢激动剂组(c-CGS组)、中枢拮抗剂组(c-DMPX组)、外周对照组(p-C组)、外周激动剂组(p-CGS组)和外周拮抗剂组(p-DMPX组)。c-CGS组和c-C组于建模后立即颅内注射腺苷A2A激动剂CGS-21680 2.5 ng/0.5 μl或等量生理盐水, p-CGS组和p-C组腹腔注射CGS-21680 0.1 mg/kg或等量生理盐水;c-DMPX组于每次丙泊酚注射前20 min颅内注射腺苷A2A受体拮抗剂DMPX 50 ng/0.5 μl, p-DMPX组腹腔注射DMPX 0.25 mg/kg。分别于建模前、建模后即刻、激动剂或生理盐水给药后(干预后)测定位置偏爱值(CPP值)。建模后1 d时处死大鼠取血标本及脑组织, 采用ELISA法检测血浆及海马多巴胺(DA)、谷氨酸(Glu)及大脑皮层5...     

胆囊黏膜G蛋白偶联胆汁酸受体1表达与胆囊结石致石胆汁关系的研究

目的 研究胆囊结石患者胆囊黏膜G蛋白偶联胆汁酸受体1 (GPBAR1)表达与致石胆汁形成的关系.方法 收集34例胆囊结石病和15例无胆石对照患者的胆囊黏膜、囊壁、胆汁、静脉血.HE常规染色病理检查胆囊壁,免疫组化染色法检测胆囊壁GPBAR1、黏蛋白1(MUC1)和黏蛋白5AC(MUC5AC)的表达水平;RT-PCR反应检测胆囊黏膜GPBAR1、MUC1和MUC5AC的基因表达水平;检测术前血清和胆囊胆汁的主要脂质成分等.结果 胆囊结石组胆囊HE染色均呈慢性炎症表现;胆囊结石组GPBAR1、MUC5AC的蛋白和mRNA表达均较对照组明显升高(61.34±8.06比43.05±7.83,P＜0.01; 52.11±9.62比45.05±9.27,P＜0.05;0.87±0.07比0.80±0.09,P＜0.05;1.04±0.22比0.8±0.17,P＜0.01).胆囊结石组血清总胆固醇水平和胆汁总胆固醇浓度、总胆固醇摩尔百分比、胆固醇饱和指数、黏蛋白浓度均较对照组明显升高(5.07±1.64比3.62±1.42,P＜0.01;17.23±3.67比12.47±2.31,P＜0.01;7.47±0.65比5.05±0.24,P＜0.01;1.03±0.58比0.69±0.38,P＜0.01;92.02±20.89比76.36±19.71,P＜0.05);而胆汁总胆汁酸浓度、胆汁酸摩尔百分比较对照组明显降低(162.68±20.19比180.21±26.05,P＜0.05; 71.28±1.84比73.29±0.96,P＜0.01).胆囊结石组胆囊GPBAR1 mRNA表达与胆汁总胆汁酸水平负相关(γ=-0.341,P＜0.05),GPBAR1表达与胆汁总胆汁酸水平和总脂质水平均负相关(γ=-0.365,P＜0.05;γ=-0.403,P＜0.05).结论 GPBAR1在胆囊结石患者胆囊黏膜表达增强,介导胆汁酸吸收,可能与致石胆汁形成有关.     

GPR49基因对肝癌细胞增殖侵袭能力的影响

目的  探讨肝癌细胞系Huh7细胞中G蛋白偶联受体49(GPR49)基因对肝癌细胞侵袭能力的影响及其分子生物学机制。方法  根据转染的小干扰RNA(si-RNA)不同, 将Huh7细胞分为GPR49-siRNA(si-GPR49)组和阴性对照NC-siRNA(si-NC)组, 另设未转染Huh7细胞为对照组(control组)。采用逆转录聚合酶链反应(RT-PCR)法和Western blot法分别检测3组细胞GPR49、细胞周期素D1(cyclin D1)、基质金属蛋白酶9(MMP9)的信使核糖核酸(mRNA)和蛋白的表达。采用MTT法和Transwell法分别检测各组细胞增殖能力和侵袭能力。结果  si-GPR49组GPR49 mRNA的相对表达量为control组的(23.8±3.1)%(P < 0.05)。与control组相比, si-GPR49组GPR49、cyclin D1、MMP9蛋白的表达量均明显降低(均为P < 0.05)。MTT检测细胞增殖能力实验结果显示, si-GPR49组细胞在72 h的吸光度(OD)值(0.53±0.12)明显低于control组(1.35±0.28), 差异有统计学意义(P < 0.05)。si-GPR49组平均穿膜细胞数为(13.6±2.5)个, 明显低于control组的(65.3±6.1)个, 差异有统计学意义(P < 0.05)。结论  GPR49-siRNA可抑制Huh7细胞GPR49基因表达。其机制可能是通过降低cyclin D1水平抑制Huh7细胞的增殖能力, 通过影响MMP9蛋白表达水平抑制Huh7细胞的迁移和侵袭能力。     

G蛋白偶联受体30介导的雌激素信号转导在雄性生殖系统中的研究进展

雌激素是人体内一种极其重要的类固醇激素,在心血管系统、运动系统、免疫系统和中枢神经系统等均发挥着重要的生物学作用,尤其在生殖细胞中的作用更为关键[1-4],雌激素的缺乏和过量可造成多种疾病的发生.雌激素是一种脂溶性化合物,可自由扩散进入细胞,雌激素的生理作用通过与其特异性受体雌激素受体(estrogenreceptors,ERs)结合而实现.     

钙敏感受体缺失对小鼠成骨细胞增殖与分化的影响及机制研究

目的 探讨钙敏感受体(CaSR)在小鼠成骨细胞增殖与分化中的作用,以及Wnt信号通路在其促进成骨细胞增殖及分化过程中的调节作用. 方法 取新生同窝野生型小鼠(对照组)和CaSR敲除纯合子小鼠(实验组)各4只,分离培养颅骨成骨细胞并传至第3代,分别于培养2、4、6、8d时采用CCK-8法测定细胞的吸光度(OD)值,检测成骨细胞碱性磷酸酶(ALP)的活性.取培养6d的细胞行实时荧光定量-聚合酶链反应(RT-qPCR)检测核心结合因子(Runx2)、ALP、骨钙素(OCN)、核激活因子受体配体(RANKL)、骨保护素(OPG)及β-链蛋白的mRNA基因表达水平;采用Western Blot检测β-链蛋白、Wnt-5a、胰岛素样生长因子-1(IGF-1)、Runx2的蛋白表达水平. 结果 培养6d时对照组和实验组成骨细胞的OD值(1.55±0.05、1.26±0.02)和ALP活性[(0.023±0.002)、(0.017±0.001)U/mg· prot]均达到峰值,与其他时间点比较差异均有统计学意义(P＜0.05);同一时间点实验组成骨细胞的OD值和ALP活性均低于对照组,差异有统计学意义(P＜0.05).与对照组比较,培养6d时实验组成骨细胞的Runx2、ALP、OCN、RANKL/OPG、β-链蛋白的mRNA表达水平,以及β-链蛋白、Wnt-5a、IGF-1、Runx2的蛋白表达水平均显著降低,两组比较差异均有统计学意义(P＜0.05). 结论 CaSR缺失将导致成骨细胞的增殖和分化障碍,其机制可能与经典的Wnt信号通路抑制有关.     

MiR-29a靶向调控瞬时受体电位通道家族4在睾丸缺血再灌注损伤中对GC-1细胞增殖及凋亡的影响及作用机制

目的:研究miR-29a通过靶向调控瞬时受体电位通道家族4(TRPV4)在睾丸缺血再灌注损伤(IRI)中对GC-1细胞增殖和凋亡的影响及作用机制。方法:建立睾丸GC-1细胞缺氧复氧模型,RT-PCR检测不同复氧损伤时间点miR-29a和TRPV4的表达水平;分别采用MTT实验、流式细胞术检测转染miR-29a对GC-1...     

NR4A1对小鼠卵巢颗粒细胞脂肪代谢相关调控因子的调节作用

目的观察NR4A1对小鼠卵巢颗粒细胞中脂肪代谢相关调控因子脂联素受体2（Adipo—R2）、解偶联蛋白2（UCP2）、B类清道夫受体（CD36）的调节作用。方法分别构建NR4A1超表达腺病毒载体（AdCMV～NR4A1）及干涉腺病毒载体（AdHl－siRNA／NR4A1）。体外培养小鼠卵巢颗粒细胞,贴壁生长至90％时,分为病毒感染组、胰岛素（100nmol／L）与胰岛素增敏剂（10μmol／L）组和病毒＋胰岛素组。Trizol裂解细胞提取总RNA,实时荧光定量PCR法检测颗粒细胞中Adipo—R2,UCP2,CD36的mRNA表达水平。结果在小鼠卵巢颗粒细胞中超表达NR4A1能够促进Adipo—R2,UCP2,CD36基因的转录（P〈O．05）,RNA干扰NR4AI后则可以抑制以上基因的表达（P〈0．05）;胰岛素可以促进UCP2,CD36基因的表达（P〈O．05）,而对Adipo—R2的作用不明显;另外胰岛素增敏剂曲格列酮也能够促进Adipo—R2,UCP2,CD36的表达（P〈0．05）;RNA干扰NR4A124h后,再向细胞中加入生理剂量（100nmol／L）胰岛素30rain后Adipo—R2,UCP2,CD36的表达水平与单独干涉组比均可逆转升高（P〈O．05）,其中UCP2的表达水平可升高到胰岛素组同样的水平,但Adipo—R2,CD36的逆转升高水平并没有达到仅加入胰岛素时的升高水平（P〈O．05）。结论NR4A1对Adipo—R2,UCP2,CD36具有正向调节作用,同时与胰岛素或胰岛素增敏剂可能有协同调节作用,进而发挥对脂肪代谢的调控。     

G蛋白耦联受体激酶结合蛋白1通过调节细胞外调节激酶1/2的活性促进成骨细胞迁移

目的探索G蛋白耦联受体激酶结合蛋白1(GITI)在成骨细胞迁移中的作用,并分析其机理。方法通过Western blot方法检测GIT1蛋白在鼠的成骨细胞内的表达；用免疫荧光染色方法确定：在血小板衍生生长因子(PDGF)不刺激和刺激的条件下,GIT1和细胞外调节激酶1/2(ERK1/2)在成骨细胞内的位置；用共同免疫沉淀的方法测定GIT1和ERK1/2相互结合,并且用免疫荧光双染的方法确定这两种蛋白相互结合的位置；用包含GIT1-RNA发夹结构的腺病毒感染成骨细胞后,用免疫荧光染色方法确定磷酸化ERK1/2(pERK1/2)在成骨细胞内的位置,用划痕愈合法检测在PDGF刺激下的迁移能力。结果在成骨细胞内,PDGF刺激导致了GIT1和ERK1/2的相互结合,并且这种结合发生在成骨细胞的局部粘附内。包含GIT1-RNA发夹结构的腺病毒明显抑制了pERK1/2招募至成骨细胞局部粘附内以及PDGF所刺激的成骨细胞的迁移。结论在PDGF刺激下,GIT1招募pERK1/2至成骨细胞的局部粘附内,从而促进成骨细胞的迁移。     

G蛋白偶联受体激酶结合蛋白1的SHD结构域对成骨细胞内局部黏附激酶活性的影响

目的 探讨G蛋白偶联受体激酶结合蛋白1(GITl)的SHD结构域对成骨细胞内局部黏附激酶(FAK)活性的影响,并分析其机制.方法 取1～2dSD大鼠颅盖骨进行成骨细胞原代培养,传至第3代.体外构建野生型GIT1和删除了SHD结构域的GIT1的质粒并组成慢病毒.血小板衍生生长因子(PDGF)刺激成骨细胞后,采用免疫共沉淀法检测GIT1、删除了SHD结构域的GIT1与FAK的相互关系,采用免疫荧光法检测GIT1和FAK在成骨细胞内的位置、删除了SHD结构域的GIT1对成骨细胞内FAK位置和活性的影响.结果 PDGF刺激成骨细胞后,GIT1与FAK的相互结合明显增加,且随着时间的增加,结合量逐渐增加(F=293.105,P=0.000).免疫荧光染色结果表明:PDGF刺激后,成骨细胞局部黏附内活性形式的FAK(FAK酪氨酸397磷酸化)明显增加.PDGF刺激成骨细胞后,删除了SHD结构域的GIT1与FAK的结合明显被抑制,且随着时间的增加,二者的相互关系无明显变化(F=0.322,P=0.737);删除了SHD结构域的GIT1抑制成骨细胞局部黏附内FAK酪氨酸397的磷酸化,同时降低FAK在局部黏附内的表达.结论 删除了SHD结构域的GIT1通过降低与FAK的相互结合,从而抑制成骨细胞局部黏附内FAK酪氨酸397的磷酸化,影响成骨细胞的功能.     

Desensitization of human renal D1 dopamine receptors by G protein-coupled receptor kinase 4

BACKGROUND: The D1 dopamine receptor, expressed in several nephron segments, participates in the regulation of water and electrolyte transport. Because the renal D1 receptor is desensitized in genetic hypertension, we sought to determine the mechanism(s) of the desensitization of D1 receptors endogenously expressed in renal proximal tubules. METHODS: The mechanisms involved in the homologous desensitization of the D1 receptor in human renal proximal tubule cells were studied by measuring the production of cAMP in response to stimulation or inhibition of G protein-coupled receptor kinase (GRK) activity and expression. Protein expression was assessed by immunoblotting. RESULTS: In human renal proximal tubule cells, the D1 agonist, fenoldopam, increased cAMP accumulation (73 +/- 2%). Fenoldopam pre-treatment decreased the responsiveness to subsequent fenoldopam stimulation (t(1/2) approximately equal to 20 min) with complete desensitization at 30 minutes. Recovery occurred gradually (t(1/2) approximately equal to 20 min) with full recovery at 60 minutes. Forskolin pretreatment minimally affected the fenoldopam effect, indicating a minor involvement of protein kinase A in the homologous desensitization process. Because GRKs are involved in the homologous desensitization process, we determined the consequences of inhibition of GRK expression and activity. Heparin, an inhibitor of GRK activity, decreased the expression of GRK2 and GRK4 and attenuated the desensitization of the D1 receptor (85 +/- 1%). Antisense oligonucleotides (GRK4> GRK2) blunted the D1 receptor desensitization. However, the first 20 minutes of homologous desensitization were not affected by either heparin or GRK antisense oligonucleotides. CONCLUSION: These studies document the critical role of GRK4, relative to GRK2, in the homologous desensitization of D1 receptors in renal proximal tubule cells. However, the early phase of homologous desensitization is regulated by a non-GRK-mediated pathway.     

Time-dependent inhibition of G protein-coupled receptor signaling by local anesthetics

BACKGROUND: Several beneficial effects of local anesthetics (LAs) were shown to be due to inhibition of G protein-coupled receptor signaling. Differences in exposure time might explain discrepancies in concentrations of LAs required to achieve these protective effects in vivo and in vitro (approximately 100-fold higher). Using Xenopus oocytes and human neutrophils, the authors studied time-dependent effects of LAs on G protein-coupled receptor signaling and characterized possible mechanisms and sites of action. METHODS: Measurement of agonist-induced Ca2+-activated Cl currents, using a two-electrode voltage clamp technique, and determination of superoxide anion production by cytochrome c assay were used to assess the effects of LAs on G protein-coupled receptor signaling in oocytes and primed and activated human neutrophils, respectively. Antisense knockdown of G alpha q protein and inhibition of various proteins within the signaling pathway served for defining mechanisms and sites of action more specifically. RESULTS: LAs attenuated G protein-coupled receptor signaling in both models in a time-dependent and reversible manner (lidocaine reduced lysophosphatidic acid signaling to 19 +/- 3% after 48 h and 25 +/- 2% after 6 h of control response in oocytes and human neutrophils, respectively). Whereas no effect was observed after extracellularly applied or intracellularly injected QX314, a lidocaine analog, using G alpha q-depleted oocytes, time-dependent inhibition also occurred after intracellular injection of QX314 into undepleted oocytes. Inhibition of phosphatases or protein kinases and agonist-independent G-protein stimulation, using guanosine 5'-O-3-thiotriphosphate or aluminum fluoride, did not affect time-dependent inhibition by LAs. CONCLUSION: Inhibition of G protein-coupled receptor signaling by LAs was found to be time dependent and reversible. Critically requiring G alpha q-protein function, this effect is located downstream of guanosine diphosphate-guanosine triphosphate exchange and is not dependent on increased guanosine triphosphatase activity, phosphatases, or protein kinases.     

氯胺酮对新生大鼠海马区G蛋白偶联受体30表达的影响

目的探讨氯胺酮对新生大鼠海马区G蛋白偶联受体30(G protein-coupled receptor 30, GPR30)表达的影响。方法实验一:随机选取20只健康雄性SD大鼠作为空白对照组(S组,n=20),在饲养1、3、7、14 d时各取出5只处死,采用免疫组化法检测大鼠海马区GPR30阳性细胞数。实验二:10只出生7 d健康雄性SD大鼠随机分为两组,生理盐水组(C组,n=5)和氯胺酮组(K组,n=5)。连续3 d腹腔注射生理盐水0.1 ml(C组)或氯胺酮75 mg/kg(K组),在末次给药后24 h处死,采用免疫组化法检测大鼠海马区cleaved caspase-3阳性细胞数,采用Western blot法检测海马区GPR30蛋白含量。结果与1 d和3 d比较,7 d和14 d S组大鼠海马区GPR30蛋白含量明显升高(P0.05);与7 d比较,14 d时S组大鼠海马区GPR30蛋白含量明显升高(P0.05)。与C组比较,K组海马区cleaved caspase-3阳性细胞数明显增多,GPR30蛋白含量明显降低(P0.05)。结论氯胺酮诱导发育期大鼠海马细胞凋亡可能与GPR30表达下调有关。     

SET蛋白对精原细胞株GC-1spg增殖和凋亡的影响

目的探讨SET蛋白对精原细胞株GC-1spg增殖和凋亡的影响。方法使用含10%胎牛血清的DMEM高糖培养基在37℃、5%CO2条件下培养GC-1spg细胞,分对照组(转染无关序列腺病毒)和实验组[转染SET干涉腺病毒(AdH1-siRNA/SET)];GC-1spg接种于96孔板或者6孔板,转染腺病毒48h、72h后收集细胞,免疫荧光和共聚焦激光扫描显微镜检测SET蛋白在GC-1spg细胞中的表达与定位;提取细胞总蛋白,Western Blot检测转染前后SET蛋白的表达;细胞计数试剂盒-8(CCK8)和5-溴脱氧尿嘧啶核苷(BrdU)标记法检测细胞的数目和增殖情况;流式细胞仪检测细胞凋亡的变化。结果 SET蛋白表达于GC-1spg细胞的胞核和胞浆中,且胞浆分布多于胞核;转染SET干涉腺病毒后,干涉组GC-1spg细胞中的SET蛋白相对表达量为(0.217±0.044)显著低于对照组的(0.629±0.170)(P0.05),同时GC-1spg细胞的数目减少,增殖减慢,且细胞凋亡率显著增加[干涉组(21.663±1.287)%,对照组(8.813±0.671)%](P均0.01)。结论SET蛋白在精原细胞GC-1spg胞核和胞浆中均有表达,且胞浆分布多于胞核;GC-1spg细胞中SET蛋白表达降低,能够抑制细胞增殖、促进细胞凋亡,提示SET蛋白可能参与调节精子发生的过程。     

Androgens induce increases in intracellular calcium via a G protein-coupled receptor in LNCaP prostate cancer cells

The receptor mechanism of testosterone-induced nongenomic Ca2+ signaling in prostate cancer cells is poorly understood. In this study we investigated androgen-induced intracellular Ca2+ increases in LNCaP human prostate cancer cells with Fura-2 as a Ca2+ probe. 5alpha-dihydrotestosterone (DHT) produced fast and transient increases in intracellular Ca2+ in LNCaP cells in a concentration-dependent manner. These effects were abolished by extracellular Ca2+ removal or pretreatment with L-type Ca2+ channel inhibitors (nifedipine, verapamil, and diltiazem). Pretreatment with endoplasmic reticulum ryanodine receptor blocker (procaine) or phospholipase C inhibitor (neomycin sulfate) did not alter DHT-induced Ca2+ influx. The concentration of Ca2+ was also increased by impermeable testosterone conjugated to bovine serum albumin. Neither an antagonist of intracellular androgen receptors (cyproterone acetate) nor a protein synthesis inhibitor (cycloheximide) affected this fast Ca2+ influx. Furthermore, the effect of DHT was abolished in cells incubated with a G protein inhibitor (pertussis toxin) and a nonhydrolyzable analog of guanosine triphosphate (guanosine 5-[beta-thio]disphosphate) but not in cells incubated with the tyrosine kinase inhibitor genistein. These results indicate that androgens induced an L-type calcium channel-dependent intracellular Ca2+ increase in LNCaP prostate cancer cells. The rapid responses triggered by DHT did not appear to be mediated through classic intracellular androgen receptors, c-Src kinase-androgen receptor complex, or sex hormone-binding globulin but through a G protein-coupled receptor in LNCaP prostate cancer cells. These results may provide a new explanation for progression of prostate cancer.     

G蛋白偶联的雌激素受体在雄性生殖中的作用

G蛋白偶联的雌激素受体(GPER),又称G蛋白偶联受体30(GPR30),是近年来发现的有别于雌激素经典核受体的功能性膜受体。该受体广泛表达于皮质、小脑、海马、心脏、肺、肝脏、骨骼肌及泌尿生殖器官等全身各个系统,与雌激素及其相关的衍生物结合,引起快速的非基因效应,参与全身各个系统的多种生理活动。本文主要对男性生殖中GPER的分子结构、亚细胞定位、信号传导、分布以及功能进行了综述。     

G蛋白偶联受体激酶(GRKs)在肾脏功能调控中的作用

G蛋白信号转导通路是人体重要的信号转导途径.G蛋白偶联受体激酶(GRKs)属丝氨酸/酪氨酸蛋白激酶家族,其亚型广泛存存于各种组织,能特异地磷酸化G蛋白偶联受体(GPCRs)使其脱敏,从而使受体介导的信号转导效应消失或者降低.肾脏中存在多种G蛋白偶联受体,现就其中具有代表性的三个受体(多巴胺受体、血小板活化因子受体、血管...     

G protein-coupled estrogen receptor reduces renal ischemia-reperfusion injury by improving diastolic function of renal interlobular artery

Objective To investigate the effect of G protein-coupled estrogen receptor (GPER) on the diastolic function of renal interlobular artery and reduce renal ischemia-reperfusion injury in rats. Methods Female ovariectomized rats were divided into control group; ischemia-reperfusion injury (IRI) group; GPER-specific agonist (G1) intervention group; GPER-specific blocker+GPER-specific agonist (G15+G1) intervention group. Histopathological examination (HE staining), renal function test and Paller score were used to identify the success of the model and the degree of kidney damage. In vitro microvascular pressure diameter measuring instrument was used to detect the relaxation and contraction activity of renal interlobular artery in each group. Immunofluorescence technique was used to observe the expression of GPER on the renal interlobular artery. Western blotting was used to detect the expression of GPER protein in renal interlobular artery of rats in each group. The NO content was determined by a nitrate reductase method. Results Compared with IRI group, serum BUN, Scr level and Paller score in G1 intervention group were significantly decreased (all P＜0.05). The systolic rate of renal interlobar artery was significantly increased [(40.76±1.57)% vs (29.78±1.87)%, P＜0.05]. The results of immunofluorescence showed that GPER was expressed in renal interlobular artery smooth muscle cells and endothelial cells, and the expression of IRI group was higher than that of the control group. The expression of G15+G1 intervention group was lower than that of G1 intervention group (all P＜0.05). Compared with the IRI group, the NO content in the G1 intervention group increased significantly (all P＜0.05). Conclusions During renal ischemia-reperfusion injury, GPER may regulate the systolic and diastolic activity of the renal interlobar artery by increasing the content of NO, so as to alleviate the renal ischemia-reperfusion injury.     

G蛋白耦联受体30与Hippo-Yes相关蛋白/转录共激活因子PDZ结合基序在甲状腺乳头状癌组织的表达及作用

目的:探讨G蛋白耦联受体30(GPR30)与Hippo-Yes相关蛋白(YAP)/转录共激活因子PDZ结合基序(TAZ)信号通路在甲状腺乳头状癌发生、发展中的影响。方法:收集福建医科大学附属第二医院2019年9月至2020年4月之间40例甲状腺乳头状癌及癌旁组织标本,分析GPR30、YAP、TAZ mRNA及蛋白表达,...