토끼 음경해면체의 비-아드레날린 비-콜린성 이완반응에서 산화질소의 역할

• 영문명: The Role of Nitric Oxide in Non-adrenergic Non-cholinergic Relaxation in the Rabbit Penile Corpus Cavernosum
• 발행기관: 대한약학회
• 저자명: 박미선(Mi Sum Park) 김진보(Jin Bo Kim) 홍은주(Eun Ju Hong) 홍승철(Sung Cheul Hong)
• 간행물 정보: 『약학회지』제41권 제3호 (1997년), 370~380쪽, 전체 11쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1997.06.30

영문 초록

The role of nitric oxide (NO) on the non-adrenergic non-cholinergic (NANC) relaxations induced by the short and prolonged electrical field stimulation (EFS) has been studied in the rabbit corpus cavernosum. In the presence of atropine and guanethidine the prolonged EFS (2-16 Hz) of corpus cavernosal strips precontracted with phenylephrine produced frequency-dependent relaxations, which were abolished by tetrodotoxin as shown in the relaxations induced gy the short EFS, indicating that their orgin is NANC nerve stimulation. NG-nitro-L-arginine (L-NNA), inhibitor of nitirc oxide synthase, caused a concentration-dependent inhibition to the NANC relaxation, and at 100 M L-NNA the relaxation were virtually abolished. The inhibitory effect of L-NNA was reversed by L-arginine. Hemoglobin abolished the relaxations to NO and also caused a concentration-dependent inhibition of the NANC relaxation. The hemoglobin-resistant relaxation induced by EFS was eliminated by L-NNA. Methylene blue significantly reduced the NANC relaxation in a conentration-dependent manner. The NANC relaxation was not affected by a VIP-inactivating pepridase, alpha0chymotrypsin, whereas VIP-induced relaxation was completely abolished. NO- and VIP-induced relaxation were not affected by L-NNA. These results indicate that the NANC relaxation induced by prolonged EFS of the rabbit corpus cavernosum is mediated by NO-guanosine 3",5"-cyclic monophosphate pathway as shown in the relaxation induced by the short EFS, and that VIP release is not essential for the NANC relaxation of the rabbit corpus cavernosum and VIP is not involved the generation fo NO.

키워드

Rabbit corpus cavernosum Long stimulated non-adrenergic non-cholinergic (NANC) relaxation Vasoactive intestinal polypeptide Nitric oxide