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Expression of adrenomedullin and its receptor in lungs of rats with hypoxic pulmonary hypertension / 中华医学杂志(英文版)
Chinese Medical Journal ; (24): 1806-1808, 2002.
Article in En | WPRIM | ID: wpr-282086
Responsible library: WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the role of adrenomedullin (AM) in the development of hypoxic pulmonary hypertension (HPH), and to assess the expression of AM and adrenomedullin receptor (AMR) in the lungs of rats with HPH.</p><p><b>METHODS</b>We exposed 10 rats to normobaric hypoxic conditions for 3 weeks to establish rat model of pulmonary hypertension; and 10 other rats were used as normoxic controls. Mean pulmonary arterial pressure (mPAP) was measured by a right cardiac catheterization. The thickness of pulmonary arterioles was measured by a computerized image analyzer. We used the reverse transcription-polymerase chain reaction (RT-PCR) to assess the change of expression of AM and AMR in lung of HPH rat model.</p><p><b>RESULTS</b>Compared with the control group, hypoxic rats developed remarkable pulmonary hypertension, increment in the thickness of pulmonary arterioles and right ventricular hypertrophy (P < 0.01). Chronic hypoxia elicited a considerable increment in expression of AM and AMR in the lungs of rats, and the ratio of AM/beta-actin and AMR/beta-actin in lungs of rats treated with hypoxia were significantly higher (P < 0.01).</p><p><b>CONCLUSIONS</b>The AM plays an important role in regulating pulmonary vascular tone and can ameliorate the development of hypoxic pulmonary hypertension in rats.</p>
Subject(s)
Full text: 1 Index: WPRIM Main subject: Pathology / Peptides / Arterioles / Gene Expression / Rats, Wistar / Hypertrophy, Right Ventricular / Receptors, Peptide / Reverse Transcriptase Polymerase Chain Reaction / Adrenomedullin / Receptors, Adrenomedullin Limits: Animals Language: En Journal: Chinese Medical Journal Year: 2002 Type: Article
Full text: 1 Index: WPRIM Main subject: Pathology / Peptides / Arterioles / Gene Expression / Rats, Wistar / Hypertrophy, Right Ventricular / Receptors, Peptide / Reverse Transcriptase Polymerase Chain Reaction / Adrenomedullin / Receptors, Adrenomedullin Limits: Animals Language: En Journal: Chinese Medical Journal Year: 2002 Type: Article