Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Control of luteolysis in the one-humped camel (Camelus dromedarius)
Autore:
Skidmore, JA; Starbuck, GR; Lamming, GE; Allen, WR;
Indirizzi:
Univuffolk,dge, Dept Vet Clin Med, Equine Fertil Unit, Newmarket CB8 9BH, S Univ Cambridge Newmarket Suffolk England CB8 9BH it, Newmarket CB8 9BH, S Camel Reprod Ctr, Dubai, U Arab Emirates Camel Reprod Ctr Dubai U Arab Emirates prod Ctr, Dubai, U Arab Emirates Univ Nottingham, Sch Biol Sci, Loughborough LE12 5RD, Leics, England Univ Nottingham Loughborough Leics England LE12 5RD 2 5RD, Leics, England
Titolo Testata:
JOURNAL OF REPRODUCTION AND FERTILITY
fascicolo: 2, volume: 114, anno: 1998,
pagine: 201 - 209
SICI:
0022-4251(199811)114:2<201:COLITO>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENDOMETRIAL OXYTOCIN RECEPTORS; ESTROUS-CYCLE; EARLY-PREGNANCY; PLASMA-CONCENTRATIONS; OVARIECTOMIZED EWES; PROGESTERONE; PROSTAGLANDIN-F2-ALPHA; SECRETION; ESTRADIOL; RELEASE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Allen, WR Univddittondge, Dept Vet Clin Med, Equine Fertil Unit, Mertoun Paddocks,Woo Univ Cambridge Mertoun Paddocks,Woodditton Rd Newmarket SuffolkEngland CB8 9BH
Citazione:
J.A. Skidmore et al., "Control of luteolysis in the one-humped camel (Camelus dromedarius)", J REPR FERT, 114(2), 1998, pp. 201-209

Abstract

Blood plasma concentrations of 13,14-dihydro-15-keto PGF(2 alpha) (PGFM) were measured in groups of mature non-pregnant and pregnant camels to study PGF(2 alpha) release patterns around the time of luteolysis and the timing of the signal for pregnancy recognition. Injection of each of four camels with 10 and 50 mg of PGF(2 alpha) showed clearly that five times the dose ofexogenous hormone produced five times the amount of PGFM: in peripheral plasma, thereby indicating that, as in other animal species, PGFM is the principal metabolite of PGF(2 alpha) in the camel. Serial sampling of three non-pregnant camels on each of days 8, 10 and 12, and three pregnant camels onday 10, after ovulation for 8 h showed a significant (P < 0.05) rise in mean plasma PGFM concentrations only on day 10 in the non-pregnant, but not the pregnant, animals. A single intravenous injection of 20, 50 or 100 iu oxytocin given to three groups of three non-pregnant camels on day 10 after ovulation did not increase their basal serum PGFM concentrations. However, daily treatment of six non-pregnant camels between days 6 and 15 (n = 3) or 20 (n = 3) after ovulation with 1-2 g Of the prostaglandin synthetase inhibitor, meclofenamic acid, inhibited PGF(2 alpha) release and thereby resulted in continued progesterone secretion throughout the period of meclofenamicacid administration. These results showed that, as in other large domesticanimal species, release of PGF(2 alpha) from, presumably, the endometrium controls luteolysis in the dromedary camel. Furthermore, reduction in the amount of PGF(2 alpha) released is associated with luteal maintenance and the embryonic signal for maternal recognition of pregnancy must be transmitted before day 10 after ovulation if luteostasis is to be achieved. However, the results also indicate that, in contrast to ruminants, the release of endometrial PGF(2 alpha) in the non-pregnant camel may not be controlled by the release of oxytocin.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 01:49:37