目的:探索前列腺Cajal间质细胞(interstitial cells of Cajal,ICCs)与交感神经及平滑肌细胞之间的形态及功能学联系。方法:(1)制作豚鼠前列腺组织冰冻切片并进行双重免疫荧光染色。使用酪氨酸激酶受体(c-Kit)作为ICCs的标记物,酪氨酸羟...目的:探索前列腺Cajal间质细胞(interstitial cells of Cajal,ICCs)与交感神经及平滑肌细胞之间的形态及功能学联系。方法:(1)制作豚鼠前列腺组织冰冻切片并进行双重免疫荧光染色。使用酪氨酸激酶受体(c-Kit)作为ICCs的标记物,酪氨酸羟化酶(tyrosine hydroxylase,TH)和多巴胺β羟化酶(dopamineβ-hydroxylase,DβH)作为交感神经纤维的标记物,α肌动蛋白(α-actin)作为平滑肌细胞的标记物。另外,分别对α1-肾上腺素受体与c-Kit以及缝隙连接蛋白Connexin43(Cx43)与c-Kit进行免疫荧光双重标记。(2)将前列腺肌条固定于灌流槽中,记录去甲肾上腺素(norepinephrine,NE)诱发的肌条收缩幅度和频率,以及加入Glivec后肌条收缩幅度和频率的变化。结果:(1)免疫荧光组织化学标记结果显示:ICCs与交感神经纤维、平滑肌细胞平行分布,ICCs边缘与交感神经、平滑肌细胞边缘密切接触,c-Kit标记的ICCs上存在α1-肾上腺素受体和缝隙连接蛋白Cx43的共表达。(2)在去甲肾上腺素的刺激下前列腺平滑肌肌条收缩幅度为(0.98±0.16)g,收缩频率为(2.54±0.28)次/min。使用Glivec后肌条收缩幅度显著下降,50μmol/L组为(0.56±0.07)g(P<0.01),200μmol/L组为(0.25±0.05)g(P<0.01),收缩频率未见明显改变,50μmol/L组为(2.67±0.32)次/min(P>0.05),200μmol/L组为(2.75±0.31)次/min(P>0.05)。结论:豚鼠前列腺ICCs具有介导前列腺交感神经信号,支配平滑肌活动的形态和功能学基础。展开更多
The ability to maintain metabolic homeostasis is a key capability critical for the survival and well-being of animals living in constantly changing environments.Metabolic homeostasis depends on neuromodulators,such as...The ability to maintain metabolic homeostasis is a key capability critical for the survival and well-being of animals living in constantly changing environments.Metabolic homeostasis depends on neuromodulators,such as biogenic amines,neuropeptides,and hormones,to signal changes in animals’ internal metabolic status and to orchestrate their behaviors accordingly.An important example is the regulation of feeding behavior by conserved molecular and cellular mechanisms across the animal kingdom.Its relatively simple brain coupled with well-characterized genetics and behavioral paradigms makes the fruit fly Drosophila melanogaster an excellent model for investigating the neuromodulatory regulation of feeding behavior.In this review we discuss the neuromodulators and neural circuits that integrate the internal physiological status with external sensory cues and modulate feeding behavior in adult fruit flies.Studies show that various specific aspects of feeding behavior are subjected to unique neuromodulatory regulation,which permits fruit flies to maintain metabolic homeostasis effectively.展开更多
文摘目的:探索前列腺Cajal间质细胞(interstitial cells of Cajal,ICCs)与交感神经及平滑肌细胞之间的形态及功能学联系。方法:(1)制作豚鼠前列腺组织冰冻切片并进行双重免疫荧光染色。使用酪氨酸激酶受体(c-Kit)作为ICCs的标记物,酪氨酸羟化酶(tyrosine hydroxylase,TH)和多巴胺β羟化酶(dopamineβ-hydroxylase,DβH)作为交感神经纤维的标记物,α肌动蛋白(α-actin)作为平滑肌细胞的标记物。另外,分别对α1-肾上腺素受体与c-Kit以及缝隙连接蛋白Connexin43(Cx43)与c-Kit进行免疫荧光双重标记。(2)将前列腺肌条固定于灌流槽中,记录去甲肾上腺素(norepinephrine,NE)诱发的肌条收缩幅度和频率,以及加入Glivec后肌条收缩幅度和频率的变化。结果:(1)免疫荧光组织化学标记结果显示:ICCs与交感神经纤维、平滑肌细胞平行分布,ICCs边缘与交感神经、平滑肌细胞边缘密切接触,c-Kit标记的ICCs上存在α1-肾上腺素受体和缝隙连接蛋白Cx43的共表达。(2)在去甲肾上腺素的刺激下前列腺平滑肌肌条收缩幅度为(0.98±0.16)g,收缩频率为(2.54±0.28)次/min。使用Glivec后肌条收缩幅度显著下降,50μmol/L组为(0.56±0.07)g(P<0.01),200μmol/L组为(0.25±0.05)g(P<0.01),收缩频率未见明显改变,50μmol/L组为(2.67±0.32)次/min(P>0.05),200μmol/L组为(2.75±0.31)次/min(P>0.05)。结论:豚鼠前列腺ICCs具有介导前列腺交感神经信号,支配平滑肌活动的形态和功能学基础。
基金Project supported by the National Natural Science Foundation of China(No.31522026)the Fundamental Research Funds for the Zhejiang Provincial Universities(No.2019XZZX003-12),China
文摘The ability to maintain metabolic homeostasis is a key capability critical for the survival and well-being of animals living in constantly changing environments.Metabolic homeostasis depends on neuromodulators,such as biogenic amines,neuropeptides,and hormones,to signal changes in animals’ internal metabolic status and to orchestrate their behaviors accordingly.An important example is the regulation of feeding behavior by conserved molecular and cellular mechanisms across the animal kingdom.Its relatively simple brain coupled with well-characterized genetics and behavioral paradigms makes the fruit fly Drosophila melanogaster an excellent model for investigating the neuromodulatory regulation of feeding behavior.In this review we discuss the neuromodulators and neural circuits that integrate the internal physiological status with external sensory cues and modulate feeding behavior in adult fruit flies.Studies show that various specific aspects of feeding behavior are subjected to unique neuromodulatory regulation,which permits fruit flies to maintain metabolic homeostasis effectively.
