Prostaglandins in ovulation

Prostaglandins in ovulation

Evidence accumulated using prostaglandin synthesis inhibitors, prostaglandin measurements, or prostaglandin antibodies in several species has supported the concept that a gonadotropin-induced preovulatory rise in follicular prostaglandins is required for ovulation. There are at least three questions which need to be answered for a further understanding of this requirement : 1) What is the mecha...

Interaction among beta-endorphin, nitric oxide and prostaglandins during ovulation in rats.

The aim of this study was to investigate the relationship between beta-endorphin and nitric oxide (NO) during the ovulatory process in rats. Immature rats were treated with equine chorionic gonadotrophin-hCG to induce ovulation. An intrabursal injection of beta-endorphin stimulated nitric oxide synthase (NOS) activity. This effect was completely reversed when naltrexone was co-injected with bet...

Prostaglandins

Knowledge of the structure and synthesis of antibodies (immunoglobulins) has developed to a remarkable degree in the last decade. Distinct classes of immunoglobulin (yG, yM, -yA, yD, yE, and their subgroups) have been identified and shown to consist of fixed numbers of light and heavy polypeptide chains organized in pairs. Each polypeptide has a segment of variable amino acid sequence; the spec...

[Prostaglandins].

Prostaglandins in human milk.

Human milk contains many different components which interact locally in the gastrointestinal tract and stimulate some systemic functions. Among these substances are prostaglandins. We obtained samples of foremilk and hindmilk in 8 lactating women by manual expression before and after 9 a.m. and 9 p.m. on the 3rd day post partum. The following values were found for prostaglandin E2: foremilk, 16...