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Titolo:
PLASMA 2-HYDROXYCATECHOLESTROGEN RESPONSES TO ACUTE SUBMAXIMAL AND MAXIMAL EXERCISE IN UNTRAINED WOMEN
Autore:
DECREE C; BALL P; SEIDLITZ B; VANKRANENBURG G; GEURTEN P; KEIZER HA;
Indirizzi:
INST GYNECOENDOCRINOL RES,DEPT APPL EXPT REPROD ENDOCRINOL,POB 134 B-3000 LOUVAIN 3 BELGIUM UNIV LUBECK,DEPT BIOCHEM & CLIN ENDOCRINOL D-23538 LUBECK GERMANY UNIV LIMBURG,FAC HLTH SCI,DEPT MOVEMENT SCI NL-6200 MD MAASTRICHT NETHERLANDS
Titolo Testata:
Journal of applied physiology
fascicolo: 1, volume: 82, anno: 1997,
pagine: 364 - 370
SICI:
8750-7587(1997)82:1<364:P2RTAS>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHYSICAL EXERCISE; PROLACTIN SECRETION; HORMONAL RESPONSES; CATECHOL ESTROGENS; CATECHOLESTROGENS; 2-HYDROXYESTRONE; METABOLISM; ESTRADIOL; PITUITARY; RELEASE;
Keywords:
AMENORRHEA; CATECHOLAMINES; CATECHOL-O-METHYLTRANSFERASE; ESTROGENS; MENSTRUAL CYCLE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
C. Decree et al., "PLASMA 2-HYDROXYCATECHOLESTROGEN RESPONSES TO ACUTE SUBMAXIMAL AND MAXIMAL EXERCISE IN UNTRAINED WOMEN", Journal of applied physiology, 82(1), 1997, pp. 364-370

Abstract

Exercise-induced menstrual problems are accompanied by an increase incatecholestrogen (CE) formation. It has been hypothesized that hypoestrogenemia may be secondary to an increased turnover from estrogens toCE, which then may disrupt luteinizing hormone release. In addition, the strong affinity of CE for the catecholamine-deactivating enzyme catechol-O-methyltransferase (COMT) has led to speculations about their possible role in safeguarding norepinephrine from premature decomposition during exercise. We investigated whether acute exercise on a cycleergometer produces any changes in CE homeostasis. a Nine untrained eumenorrheic women (body fat, 24.8 +/- 3.1%) volunteered for this study Baseline plasma CE averages for total a-hydroxyestrogens (2-OHE) were 218 +/- 29 (SE) pg/ml during the follicular phase (FPh) and 420 +/- 58pg/ml during the luteal phase (FPh). 2-Methosyestrogens (2-MeOE) measured 257 +/- 17 pg/ml in the FPh and 339 +/- 39 pg/ml in the LPh. During incremental exercise, total estrogens (E) increased, but 2-OHE and 2-MeOE levels did not significantly change in either phase. The 2-OHE/E ratio (measure of CE turnover) decreased during exercise in both menstrual phases, whereas the 2-MeOE/2-OHE ratio (correlates with COMT activity) did not significantly change. These findings suggest that there is insufficient evidence to conclude that brief incremental exercisein untrained eumenorrheic females acutely produces increased CE formation.

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Documento generato il 01/12/20 alle ore 08:14:20