{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,4,9]],"date-time":"2025-04-09T12:32:11Z","timestamp":1744201931201},"reference-count":23,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2011,1,7]],"date-time":"2011-01-07T00:00:00Z","timestamp":1294358400000},"content-version":"vor","delay-in-days":5364,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[1996,5]]},"abstract":"<jats:p>Objective. To study the role of decidual monoamine oxidase (MAO) \u2010A and \u2010B activities before delivery, the relationship between MAO activity in fetal membranes and catecholamine (CA) concentration in amniotic fluid (AF) was determined.<\/jats:p><jats:p>Methods. Fetal membranes and AF were obtained at the time of elective Cesarean section (CS group, n=11) and Cesarean section due to fetal distress without labor pains (FD group, n=5). MAO\u2010A and \u2010B activities were radiometrically measured using <jats:sup>14<\/jats:sup>C\u20105\u2010hydroxytriptamine for MAO\u2010A substrate and <jats:sup>14<\/jats:sup>C\u2010benzylamine for MAO\u2010B substrate. CA concentrations in AF were measured by high performance liquid chromatograph with an electro\u2010chemical detector.<\/jats:p><jats:p>Results. Both MAO\u2010A and \u2010B activities in decidua obtained from CS were significantly lower than those obtained from FD. Both norepinephrine (NE) and epinephrine (EP) concentrations were significantly lower in the CS group than the FD group. A significant positive correlation between decidual MAO\u2010A activity and NE concentration in AF was observed. No significant correlation was observed between MAO\u2010B activity and the concentration of NE in AF. There was no correlation between EP concentrations and MAO activities.<\/jats:p><jats:p>Conclusion. These results suggest that CA concentration in AF may be related to the activity of MAO in fetal membranes, determined by certain physiological processes during pregnancy. It has been suggested that metabolism of monoamines in fetal membranes also plays an important role in reducing monoamine influx into maternal myometrium from the AF.<\/jats:p>","DOI":"10.3109\/00016349609033347","type":"journal-article","created":{"date-parts":[[2007,11,22]],"date-time":"2007-11-22T00:48:41Z","timestamp":1195692521000},"page":"423-427","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["A study of monoamine oxidase activity in fetal membranes"],"prefix":"10.1111","volume":"75","author":[{"given":"Akihiko","family":"Sekizawa","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiromi","family":"Ishikawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taro","family":"Morimoto","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazuhiro","family":"Hirose","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akira","family":"Suzuki","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Saito","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takumi","family":"Yanaihara","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuichiro","family":"Arai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Katsuji","family":"Oguchi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2011,1,7]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9378(80)90639-0"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9378(15)33298-1"},{"key":"e_1_2_1_4_1","first-page":"253","article-title":"Catecholamine in amniotic fluid as indicator of intrapartum fetal stress","volume":"39","author":"Yashiro Y.","year":"1985","journal-title":"Acta Med Okayama"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1447-0756.1994.tb00425.x"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1159\/000178646"},{"key":"e_1_2_1_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1447-0756.1989.tb00191.x"},{"key":"e_1_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/0006-2952(68)90066-X"},{"key":"e_1_2_1_9_1","first-page":"393","article-title":"Some puzzling pharmacological effects of monoamine oxidase inhibitors","volume":"5","author":"Knoll J.","year":"1972","journal-title":"Adv Biochem Psychopharmacol"},{"key":"e_1_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.85.13.4934"},{"key":"e_1_2_1_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/0024-3205(74)90089-7"},{"key":"e_1_2_1_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/0006-2952(78)90262-9"},{"key":"e_1_2_1_13_1","article-title":"The possible role of monoamine oxidase in fetal membranes","author":"Sekizawa A.","year":"1995","journal-title":"Biogenic Amines"},{"key":"e_1_2_1_14_1","first-page":"360","article-title":"A study of the factors affecting the aluminum oxide\u2010trihydroxyindole procedure for the analysis of catecholamines","volume":"138","author":"Anton A. 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