Postnatal Changes in Atrial Compliance and Stretch-Induced ANP Secretion in Rabbits
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- 영문명
- Postnatal Changes in Atrial Compliance and Stretch-Induced ANP Secretion in Rabbits
- 발행기관
- 대한생리학회-대한약리학회
- 저자명
- Suhn Hee Kim Kyung Sun Lee Sung Zoo Kim Kyung Hwan Seul Kyung Woo Cho
- 간행물 정보
- 『The Korean Journal of Physiology & Pharmacology』제4권 제5호, 393~401쪽, 전체 9쪽
- 주제분류
- 의약학 > 의학일반
- 파일형태
- 발행일자
- 2000.01.01
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국문 초록
영문 초록
To define the postnatal changes in ANP secretion in response to mechanical stretch and atrial compliance, experiments have been done in perfused nonbeating rabbit atria with different ages: 1-day, 1-, 2-, 3-, 4-, and 8-wk-old. In 1-day-old-rabbits, an increase in intraatrial pressure resulted in an increase in atrial volume, which was higher than that in 1-wk-old rabbits. Increases in atrial volume stimulated the secretion of ANP with concomitant translocation of extracellular fluid (ECF) into the atrial lumen. However, mechanically stimulated ECF translocation was lower in 1-day-old rabbits than that in 1-wk-old rabbits. Therefore, positive relationship between mechanically stimulated ECF translocation and ANP secretion was shifted upward in 1-day-old rabbits, as compared to 1-wk-old rabbits. Changes in atrial volume and ECF translocation were gradually increased with aging and reached the peak value at 4 wk. The stretch-induced ANP secretion in terms of ECF translocation (the interstitial ANP concentration) was also increased with aging and reached the peak value at 4 wk. The interstitial ANP concentration was dependent on the atrial content of ANP. These data suggest that the higher level of atrial ANP secretion is related to the postnatal changes in atrial volume and unidentified factor.
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