高血压对良性前列腺增生组织中血管新生影响的研究

目的探讨原发性高血压对良性前列腺增生(BPH)组织中血管新生的影响。方法应用免疫组织化学方法检测了50例单纯BPH和50例BPH并发高血压患者的前列腺组织中CD34抗原及血管内皮生长因子(VEGF)的表达,并计算微血管密度(MVD)。结果BPH并发高血压组MVD明显高于单纯BPH组(P<0.01)。BPH并发高血压组内,高血压病程≥15年组MVD明显大于高血压病程<15年组(P<0.05);高血压病程与前列腺容积有明显相关性。BPH并发高血压组VEGF在前列腺间质中的阳性表达率显著高于单纯BPH组(P<0.05)。BPH并发高血压组前列腺组织的MVD与间质中VEGF表达呈显著正相关(r=0.11,P<0.05)。结论高血压与前列腺间质中VEGF的表达升高密切相关。VEGF的表达升高可以诱导血管新生,因此可以促进并发高血压患者BPH的临床进展。

Impact of hypertension on angiogenesis in the tissues of benign prostatic hyperplasia

OBJECTIVE: To investigate the impact of primary hypertension on angiogenesis in the tissues of benign prostatic hyperplasia (BPH). METHODS: Immunohistochemistry was carried out to examine the expression of CD34, so as to calculate the microvassel density (MVD), and the expression of vascular endothelial growth factor (VEGF) in the tissues of prostatic gland, resected during operation, of 50 simple BPH patients, aged 68.3 (56 approximately 83), and 50 patients with BPH with hypertension, aged 69.0 (55 approximately 91) with a course of hypertension of 16.5 +/- 11.9 years (1 - 41 years). RESULTS: The MVD of the simple BPH group was 23.1 +/- 9.2, significantly lower than that of the BPH complicated with hypertension group (28.2 +/- 9.5, P < 0.01), especially the BPH complicated with hypertension group with a course >/= 15 years (31.3 +/- 8.5). The MVD of the BPH complicated with hypertension group with a course >/= 15 years was significantly higher than that of the BPH complicated with hypertension group with a course < 15 years (25.7 +/- 9.7, P < 0.05). The VEGF positive rate of the stroma of the simple BPH group was 46.0%, significantly lower than that of the BPH complicated with hypertension group (66.0%, P < 0.05), especially that of the BPH complicated with hypertension group with a course >/= 15 years (81.8%). The VEGF positive rate of the stroma of the BPH complicated with hypertension group with a course >/= 15 years was significantly higher than that of the BPH complicated with hypertension group with a course < 15 years (53.6%, P < 0.05). In the group of BPH with hypertension, MVD was positively correlated with the expression of VEGF in the stromal tissue (R = 0.11, P < 0.05). CONCLUSION: Hypertension may be closely related to the increased expression of VEGF in prostatic stroma. The increased expression of VEGF may induce angiogenesis and consequently lead to clinical progression of BPH in patients with hypertension.