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为探讨神经肽 Ｙ 对血管壁平滑肌细胞凋亡相关基因表达的诱导作用，以体外培养血管平滑肌细胞模型为研究对象，运用免疫荧光组织化学技术和激光共聚焦显微镜定量研究神经肽 Ｙ 对血管平滑肌细胞凋亡相关基因ｂｃｌ－ ２ 、ｂａｘ 和ｆａｓ 表达的影响，以阐明神经肽 Ｙ 参与高血压和动脉粥样硬化等心血管疾病发生的分子机制。结果发现，神经肽 Ｙ 浓度为１０ － ６ ｍｏｌ／ Ｌ 时，血管平滑肌细胞凋亡相关基因ｂｃｌ－ ２ 和ｂａｘ 表达的平均荧光值分别为１８３４ ．２５ ±１３８ ．５５ 和１８７０ ．８２ ±１６２ ．４３ ，明显高于对照组的１６８２ ．８７ ±９４ ．４７ 和１６８８ ．０４ ±１１０ ．９１（ Ｐ＜ ０ ．０１） ；当神经肽 Ｙ 浓度为１０ － ７ ｍｏｌ／ Ｌ 时，ｂｃｌ－ ２ 和ｂａｘ 的表达降低（ Ｐ＜ ０ ．０５） ；而神经肽 Ｙ 浓度为１０ － ８ ｍｏｌ／ Ｌ 时，ｂｃｌ－ ２ 和ｂａｘ 的表达已接近对照组的表达水平（ Ｐ＞ ０ ．０５） 。但ｆａｓ 仅在神经肽 Ｙ 浓度为１０ － ６ ｍｏｌ／ Ｌ时，其平均荧光值为１９８７ ．６８ ±１８５ ．３９ ，与对照组的１８８２ ．３８ ±１６０ ．８４ 相比明显增高（ Ｐ＜ ０ ．０５） 。结果提示，神经肽 Ｙ可诱导体外培养的
To investigate the neuropeptide Y induced vascular smooth muscle cell apoptosis-related gene expression in vitro cultured vascular smooth muscle cell model for the study, the use of immunofluorescence staining and confocal laser scanning microscopy quantitative study of neuropeptide Y on vascular smooth muscle cells Apoptosis-related genes bcl-2, bax and fas expression in order to clarify the neuropeptide Y involved in the pathogenesis of hypertension and atherosclerosis and other cardiovascular diseases molecular mechanism. The results showed that when the concentration of neuropeptide Y was 10 - 6 mol / L, the mean fluorescence values of bcl - 2 and bax in vascular smooth muscle cells were 1834. 25 ± 138. 55 and 1870. 82 ± 162. 43, significantly higher than the control group of 1682. 87 ± 94. 47 and 1688. 04 ± 110. 91 (P <0.01). The expression of bcl - 2 and bax decreased when neuropeptide Y concentration was 10-7 mol / L (P <0.05) L, the expressions of bcl-2 and bax were close to those of the control group (P> 0.05). However, the average fluorescence value of fas at the neuropeptide Y concentration of 10 - 6 mol / L was 1987. 68 ± 185. 39, compared with 1882 in the control group. 38 ± 160. 84 was significantly higher (P <0 .05). The results suggest that neuropeptide Y can be induced in vitro