目的探讨转化生长因子-β受体(transform ing growth factorβreceptor,TGF-βR)在脂溢性角化病皮损中表达水平的变化及其意义。方法采用实时定量聚合酶链式反应(quantitative real-tim e PCR)和S-P免疫组织化学技术分别检测脂溢性角化...目的探讨转化生长因子-β受体(transform ing growth factorβreceptor,TGF-βR)在脂溢性角化病皮损中表达水平的变化及其意义。方法采用实时定量聚合酶链式反应(quantitative real-tim e PCR)和S-P免疫组织化学技术分别检测脂溢性角化病及正常对照皮肤中I型和Ⅱ型TGF-β受体(TGF-βRⅠ,TGF-βRⅡ)的表达。结果TGF-βRⅠ和TGF-βRⅡ在脂溢性角化病皮损表皮中的表达较正常表皮显著降低。结论脂溢性角化病皮损中表皮TGF-β受体表达下调有助于表皮细胞的异常增生,促进了该表皮肿瘤的形成。展开更多
To investigate whether treatment with retinoic acid (RA) could improve level of lung alveolarization and influence lung collagen in newborn rats exposed to hyperoxia, newborn Sprague-Dawley rats aged 2 days were ra...To investigate whether treatment with retinoic acid (RA) could improve level of lung alveolarization and influence lung collagen in newborn rats exposed to hyperoxia, newborn Sprague-Dawley rats aged 2 days were randomly assigned to 8 groups:(1) air, (2) O 2, (3) air+NS, (4) O 2+NS, (5) air+dex, (6) O 2+dex, (7) air+RA and (8) O 2+RA. Group 2, 4 6 and 8 were kept in chambers containing 85 % oxygen, the values were checked 3 times a day. The other 4 groups were exposed to room air. Level of alveolarization and lung collagen were analyzed at age of 14 or 21 days through radial alveolar counts, alveolar airspace measurements, type Ⅰ, Ⅲ collagen immunohistochemical methods (SP method) and image processing system. Transforming growth factor-β receptors and procollagen mRNA accumulation were examined at age of 14 days through immunohistochemical methods and in situ hybridization. Our results showed that radial alveolar counts were increased and distal airspace was enlarged in group 8. TypeⅠcollagen was markedly increased, and transforming growth factor-β receptors and procollagen mRNA were decreased by retinoic acid in bronchial epithelial cells, alveolar epithelial cells and alveolar intersitium. It is concluded that retinoic acid can partially reverse lung development arrest during exposure to hyperoxia by increasing lung collagen.展开更多
A new compound,3,5-dihydroxy-N-（3-nitrobenzylidene）benzohydrazide （DNBB） methanol solvate,was synthesized and characterized by single-crystal X-ray diffraction.DNBB crystallizes in a monoclinic system,space group ...A new compound,3,5-dihydroxy-N-（3-nitrobenzylidene）benzohydrazide （DNBB） methanol solvate,was synthesized and characterized by single-crystal X-ray diffraction.DNBB crystallizes in a monoclinic system,space group P2 1/c with a=8.387（4）,b=23.237（10）,c=9.133（3）,β=122.10（3）o,Z=4,V=1507.8（12） 3,D c=1.464 g/cm 3,F（000）=696.0,μ=0.116 mm-1,the final R=0.0480 and wR=0.1294.DNBB exhibited low toxicity on Caco-2 cell culture and produced significant inhibitory effect on the contraction of rat jejunal longitudinal smooth muscle （JLSM）.The mechanism of DNBB on JLSM was correlated to the stimulation of α and β adrenergic receptors since α receptor antagonist phentolamine and β receptor antagonist propranolol abolished the inhibitory effects of DNBB on the contraction of JLSM,respectively.展开更多
文摘目的探讨转化生长因子-β受体(transform ing growth factorβreceptor,TGF-βR)在脂溢性角化病皮损中表达水平的变化及其意义。方法采用实时定量聚合酶链式反应(quantitative real-tim e PCR)和S-P免疫组织化学技术分别检测脂溢性角化病及正常对照皮肤中I型和Ⅱ型TGF-β受体(TGF-βRⅠ,TGF-βRⅡ)的表达。结果TGF-βRⅠ和TGF-βRⅡ在脂溢性角化病皮损表皮中的表达较正常表皮显著降低。结论脂溢性角化病皮损中表皮TGF-β受体表达下调有助于表皮细胞的异常增生,促进了该表皮肿瘤的形成。
文摘To investigate whether treatment with retinoic acid (RA) could improve level of lung alveolarization and influence lung collagen in newborn rats exposed to hyperoxia, newborn Sprague-Dawley rats aged 2 days were randomly assigned to 8 groups:(1) air, (2) O 2, (3) air+NS, (4) O 2+NS, (5) air+dex, (6) O 2+dex, (7) air+RA and (8) O 2+RA. Group 2, 4 6 and 8 were kept in chambers containing 85 % oxygen, the values were checked 3 times a day. The other 4 groups were exposed to room air. Level of alveolarization and lung collagen were analyzed at age of 14 or 21 days through radial alveolar counts, alveolar airspace measurements, type Ⅰ, Ⅲ collagen immunohistochemical methods (SP method) and image processing system. Transforming growth factor-β receptors and procollagen mRNA accumulation were examined at age of 14 days through immunohistochemical methods and in situ hybridization. Our results showed that radial alveolar counts were increased and distal airspace was enlarged in group 8. TypeⅠcollagen was markedly increased, and transforming growth factor-β receptors and procollagen mRNA were decreased by retinoic acid in bronchial epithelial cells, alveolar epithelial cells and alveolar intersitium. It is concluded that retinoic acid can partially reverse lung development arrest during exposure to hyperoxia by increasing lung collagen.
基金supported by the National Natural Science Foundation of China (No. 30772601)
文摘A new compound,3,5-dihydroxy-N-（3-nitrobenzylidene）benzohydrazide （DNBB） methanol solvate,was synthesized and characterized by single-crystal X-ray diffraction.DNBB crystallizes in a monoclinic system,space group P2 1/c with a=8.387（4）,b=23.237（10）,c=9.133（3）,β=122.10（3）o,Z=4,V=1507.8（12） 3,D c=1.464 g/cm 3,F（000）=696.0,μ=0.116 mm-1,the final R=0.0480 and wR=0.1294.DNBB exhibited low toxicity on Caco-2 cell culture and produced significant inhibitory effect on the contraction of rat jejunal longitudinal smooth muscle （JLSM）.The mechanism of DNBB on JLSM was correlated to the stimulation of α and β adrenergic receptors since α receptor antagonist phentolamine and β receptor antagonist propranolol abolished the inhibitory effects of DNBB on the contraction of JLSM,respectively.
