This study was conducted to evaluate histochemical alterations of river buffalo’s uterine wall acid andalkaline phosphatases (ALP and ACP), lipase and carbohydrate ratio during follicular and luteal phases.Forty apparently healthy and non pregnant river buffalos were considered for removal of the uterus aftersacrifice in slaughterhouse. All dissected uteri were divided into two luteal (by obser...

A major role of the corpus luteum (CL) is to produce progesterone (P4). The CL has immature vasculature shortly after ovulation, suggesting it exists under hypoxic conditions. Hypoxia-inducible factor-1 (HIF1) induces the expression of glucose transporter 1 (GLUT1). To clarify the physiological roles of GLUT1 in bovine CL, we examined GLUT1 mRNA expression in the CL under hypoxic conditions by ...

We have shown recently that the bovine corpus luteum (CL) possesses specific luteal cell surface membrane binding sites for progesterone. We have now confirmed and extended these observations to compare the subcellular distribution of these binding sites in developing, mature and regressing CL. The median buoyant densities of luteal progesterone binding sites from early-, mid- and late-luteal p...

In the menstrual cycle, extensive angiogenesis accompanies luteinization. During luteolysis, endothelial cells die, whereas in a conceptual cycle, the corpus luteum (CL) persists, and endothelial cell survival is extended. A main stimulator for angiogenesis is vascular endothelial growth factor (VEGF), while the angiopoietins (Ang-1 and Ang-2) may be important modulators. The aim of this study ...

BACKGROUND The interactions between luteal, vascular endothelial, immune cells and its products: steroids, peptide hormones, prostaglandins (PGs), growth factors and cytokines play a pivotal role in the regulation of corpus luteum (CL) function. Luteal endothelial cells undergo many dynamic morphological changes and their action is regulated by cytokines. The aims are: (1) to establish in vitro...

PROSTAGLANDIN BIOSYNTHESIS, TRANSPORT AND SIGNALING IN CORPUS 1 LUTEUM: A BASIS FOR AUTOREGULATION OF LUTEAL FUNCTION 2 3 4 Arosh JA, Banu SK, Chapdelaine P, Madore E, Sirois J and Fortier MA 1, 2, 3 5 6 7 1 Unité d'Ontogénie et Reproduction, Centre Hospitalier Universitaire de Québec, CHUL, 8 CRBR, 2 Département d'Obstétrique et Gynécologie, Université Laval, Québec, G1K 704. 9 CRRA, Départeme...

In an experiment replicated over 2 yr, 149 suckled beef cows were administered Syncro-Mate-B (SMB), a 6-mg Norgestomet (NOR) ear implant (in situ 9 d) in conjunction with an i.m. injection of 5 mg of estradiol valerate (EV), and either 3.0, 4.5, or 6.0 mg of NOR, 2 d after estrus. All cows were artificially inseminated a t 48 h (timed insemination; TI) after implant removal (IR) and cows were r...

Women in large number are engaged in skilled and unskilled sectors of job and there is increasing participation of women in sports, Considering the fact that cyclical endocrine profile in females can have bearing on cardiovascular and respiratory function, in turn on physical capacity, The study of effects of phases of menstrual cycle on physical working capacity was undertaken in 40 female stu...

Follicular growth, circulating estradiol concentrations and endometrial prostaglandin F2 alpha (PGF2 alpha) production were measured to determine whether there is an interrelationship among these factors associated with luteolysis. Follicular growth was monitored by rectal palpation every other day during diestrus in 16 mares. Plasma estradiol was determined for daily samples during all estrous...