Response of mucous cells, in the epidermis of the catfish Clarias batrachus, to a sublethal concentration of sodium dodecyl sulfate was studied and correlated with the alteration in the status of their secretory activ...Response of mucous cells, in the epidermis of the catfish Clarias batrachus, to a sublethal concentration of sodium dodecyl sulfate was studied and correlated with the alteration in the status of their secretory activity after different durations of the treatment. At 4h, 8h, 24h,48h and 72h of the detergent treatment, most mucous cells attained voluminous dimensions and appeared closely approximating to or even overlapping the adjacent ones. At 12h, 36h, and 60h, in contrast, the mucous cells appeared small and slender, and seemed to be located at greater intervals. These changes in dimensions were responsible for the apparent increase or decrease in the density of mucous cells after different durations of detergent treatment. Statistically, however, no significant change was observed in the total number of the mucous cells throughout the experiment.The mucous cells appeared enlarged towards the end of the experiment signifying increased mucus production. This is considered as an adaptation, for protection, assisting the fish to adjust to the changed environment.A shift in the histochemical nature of the secretory contents at the middle and basal parts of the mucous cells, from a mixture of neutral and acid glycoproteins to neutral glycoproteins, during the early stages of the treatment suggests that acid moities could not simultaneously be synthesized as an immediate response to enhanced mucous secretion. The apical parts of the mucous cells, however, showed no histochemical change throughout the experiment.展开更多
目的研究黄桑胶囊治疗慢性阻塞性肺疾病(COPD)模型大鼠的机制。方法将72只大鼠按体重随机均分为正常组、模型组、阳性组、黄桑胶囊(14.8、7.4、3.6 g·kg-1)组;麻醉大鼠后向其气管内注入0.2 m L脂多糖溶液,正常组注入0.2 m L生...目的研究黄桑胶囊治疗慢性阻塞性肺疾病(COPD)模型大鼠的机制。方法将72只大鼠按体重随机均分为正常组、模型组、阳性组、黄桑胶囊(14.8、7.4、3.6 g·kg-1)组;麻醉大鼠后向其气管内注入0.2 m L脂多糖溶液,正常组注入0.2 m L生理盐水,每周一次,连续8周。于造模第29日起,ig给予阳性对照组大鼠固本咳喘片(0.77 g·kg-1),ig给予黄桑胶囊各剂量组相应浓度的黄桑胶囊,ig给予正常组、模型组大鼠生理盐水。于给药第42日采血,检测血清中白细胞介素-8(IL-8)、肿瘤坏死因子-α(TNF-α)的水平。结果黄桑胶囊不同剂量组大鼠的一般情况明显好于模型组的;与模型组比较,黄桑胶囊高、中剂量组的IL-8水平显著下降,高剂量组的TNF-α水平也显著下降。结论黄桑胶囊对COPD的治疗作用与调节血清中IL-8、TNF-α的水平有关,可能是其干预COPD发生、发展的机制之一。展开更多
文摘Response of mucous cells, in the epidermis of the catfish Clarias batrachus, to a sublethal concentration of sodium dodecyl sulfate was studied and correlated with the alteration in the status of their secretory activity after different durations of the treatment. At 4h, 8h, 24h,48h and 72h of the detergent treatment, most mucous cells attained voluminous dimensions and appeared closely approximating to or even overlapping the adjacent ones. At 12h, 36h, and 60h, in contrast, the mucous cells appeared small and slender, and seemed to be located at greater intervals. These changes in dimensions were responsible for the apparent increase or decrease in the density of mucous cells after different durations of detergent treatment. Statistically, however, no significant change was observed in the total number of the mucous cells throughout the experiment.The mucous cells appeared enlarged towards the end of the experiment signifying increased mucus production. This is considered as an adaptation, for protection, assisting the fish to adjust to the changed environment.A shift in the histochemical nature of the secretory contents at the middle and basal parts of the mucous cells, from a mixture of neutral and acid glycoproteins to neutral glycoproteins, during the early stages of the treatment suggests that acid moities could not simultaneously be synthesized as an immediate response to enhanced mucous secretion. The apical parts of the mucous cells, however, showed no histochemical change throughout the experiment.
文摘目的研究黄桑胶囊治疗慢性阻塞性肺疾病(COPD)模型大鼠的机制。方法将72只大鼠按体重随机均分为正常组、模型组、阳性组、黄桑胶囊(14.8、7.4、3.6 g·kg-1)组;麻醉大鼠后向其气管内注入0.2 m L脂多糖溶液,正常组注入0.2 m L生理盐水,每周一次,连续8周。于造模第29日起,ig给予阳性对照组大鼠固本咳喘片(0.77 g·kg-1),ig给予黄桑胶囊各剂量组相应浓度的黄桑胶囊,ig给予正常组、模型组大鼠生理盐水。于给药第42日采血,检测血清中白细胞介素-8(IL-8)、肿瘤坏死因子-α(TNF-α)的水平。结果黄桑胶囊不同剂量组大鼠的一般情况明显好于模型组的;与模型组比较,黄桑胶囊高、中剂量组的IL-8水平显著下降,高剂量组的TNF-α水平也显著下降。结论黄桑胶囊对COPD的治疗作用与调节血清中IL-8、TNF-α的水平有关,可能是其干预COPD发生、发展的机制之一。