Expression　of　preproopiomelanocortin　mRNA　and　preprodynorphin　mRNA　in　brain　of　spontaneously　hyperte

目的：检测前阿黑皮原（ＰＯＭＣ）和强啡肽原（ＰＰＤ）基因在高血压（ＳＨＲ）和同龄ＷｉｓｔａｒＫｙｏｔｏ大鼠（ＷＫＹ）中的表达．方法：用地高辛（ＤＩＧ）标记的ＲＮＡ探针进行原位杂交检测ＰＯＭＣｍＲＮＡ和ＰＰＤｍＲＮＡ．结果：ＰＯＭＣｍＲＮＡ主要表达于弓状核，而ＳＨＲ表达量大于ＷＫＹ．ＰＰＤｍＲＮＡ表达于海马、下丘脑、中脑中央灰质、孤束核、胸髓．在齿状回、孤束核、内侧视前区，ＳＨＲＰＰＤｍＲＮＡ表达量少于ＷＫＹ；在弓状核、胸髓、海马ＣＡ１、ＣＡ２、ＣＡ３两者之间无差别．结论：ＳＨＲ弓状核ＰＯＭＣｍＲＮＡ增加和齿状核等ＰＰＤｍＲＮＡ减少可能与高血压的发病有关．

AIM: To compare the expressions of prepropiomelanocortin (POMC) mRNA and preprodynorphin (PPD) mRNA between 16 wk old spontaneously hypertensive rats (SHR) and age matched normotensive Wistar Kyoto rats (WKY). METHODS: The expression of POMC mRNA and PPD mRNA were detected with nonradioactive in situ hybridization by digoxigenin labeled RNA probe. RESULTS: POMC mRNA mainly was expressed in arcuate nucleus, compared with WKY, SHR had higher level of POMC mRNA (542). PPD mRNA was found in hippocampus, hypothalamus, central gray, nucleus of the solitary tract (NTS), and thoracic spinal cord ( T4-T6 ). Compared with WKY, PPD mRNA level of SHR decreased in dentate gyrus (2342), NTS (381), and medial preoptic area (467); no difference was observed in arcuate nucleus (263), thoracic spinal cord (750-1800) and CA1, CA2, CA3 of hippocampus (1674, 2014, 2626). CONCLUSION: Increase of POMC mRNA in arcuate nucleus and decrease of PPD mRNA in dentate gyrus of SHR may be associated with the genesis of spontaneous hypertension.