Plasma and red blood cell β-endorphin immunoreactivity in normal and complicated pregnancies: Gestational age variation

Evans, Mark I.; Fisher, Alice; Robichaux, Alfred G.; Staton, Richard C.; Rodbard, David; Larsen, John W.; Mukherjee, Anil B.

doi:10.1016/0002-9378(85)90264-9

Cited by 17 publications

(3 citation statements)

References 13 publications

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“…Several human studies have evaluated both BEP and BLP in pregnancy [7][8][9][10]. Studies which reported in creased BEP also reported increased BEP/BLP ratios, while ratios remained unchanged when no BEP increase was seen [7], These results are in essential agreement with the present monkey data.…”

Section: Discussionsupporting

confidence: 83%

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Late-Pregnancy Changes in Peripheral Plasma Beta-Endorphin in Rhesus Monkeys(Macaca mulatto)

Golub

Eisele²,

Hwang³

et al. 1989

Gynecol Obstet Invest

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Peripheral plasma beta-endorphin (BEP) was measured in 10 pregnant monkeys during the third trimester (14–21 weeks gestation, term = 23.5 weeks). The study was intended to identify a late-pregnancy rise in BEP that has been reported in women. Levels rose in late pregnancy only in animals that delivered within a few days of the final sample. When both BEP and beta-lipoprotein (BLP) were measured in a further group of 10 animals, the late-pregnancy BEP rise was not accompanied by a rise in BLP. Multiple regression indicated that plasma BEP was correlated with plasma cortisol but that an independent influence of gestational age could be detected. We conclude that monkeys exhibit a rise in BEP just prior to parturition that is not accompanied by increases in cortisol and BLP that would indicate general maternal pituitary activation

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Section: Discussionsupporting

confidence: 83%

“…Some investigators have found es sentially no change [5,6] while others have reported a rise in late gestation [7][8][9][10]. Inconsistent results ob tained thus far have been attributed to sampling and analytical differences between studies in clinical popu lations.…”

Section: Introductionmentioning

confidence: 88%

Late-Pregnancy Changes in Peripheral Plasma Beta-Endorphin in Rhesus Monkeys(Macaca mulatto)

Golub

Eisele²,

Hwang³

et al. 1989

Gynecol Obstet Invest

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show abstract

“…In late pregnancy period (Evans et al,.1985) reported that the increased activity of β-endorphin producing cells either in the pituitary gland, from placenta or due to a direct fetal input into whole blood β-endorphin concentration may be related to the observed increase in β-endorphin concentration. Also, (Haulse and Coleman, 1984) attributed increasing βendorphin concentration to the high circulating level of steroid hormones which exerts a positive effect on the β-endorphin contents of both pituitary lobes.…”

Section: Concentration Of β-Endorphin and Cortisol In Blood Plasmamentioning

confidence: 99%

Peripartum Beta Endorphin levels in Relation to Labor Disorders and Post-Calving Reproductive Performance of Buffaloes.

El-Malky

El-Ghait

2016

Journal of Animal and Poultry Production

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The aim of this study was determine the relationship between plasma β-endorphin profiles in the peripheral blood circulation and cortisol concentrations during peri-partum (pre-and post-partum periods) of buffalo cows severed from dystocia, retained placenta or delayed heat (oestrus) and long calving interval in the previous parity. Blood samples were collected from 20 buffalo cow in late pregnancy period (2 months before expected parturition date) until 100 days after calving. Twenty buffalo cows were divided into four groups according to parturition disorders, 5 animals in each. Animals showed normal calving (group A), suffering from dystocia (group B), with retained placenta (group C) and having long calving interval in the previous parity (group D). At parturition, results showed that buffalo cows suffering from calving disorders groups B, C and D had higher βendorphin concentrations than that in group A. Whereas, β-endorphin concentrations were (110.15±3.21, 124.08±2.84, 104.09±2.45 and 96.53±0.94) respectively, at one month before parturition. Average β-endorphin concentration in buffalo cows with retained placenta, dystocia and delayed heat during peri-parturient period was higher (P<0.01) than in group A. Peak of βendorphin at the time of parturition was noticed in all buffalo groups especially in group C. Both of β-endorphin and cortisol secretion showed the concomitant trend during peri-parturient period, showing gradually decrease after parturition till two months of delivery. Finally, buffalo cows which had calving disorders showed a clear impact on blood plasma β-endorphin concentration at late pregnancy, time of delivery and post-partum periods.

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Food Cravings, Endogenous Opioid Peptides, and Food Intake: A Review

1997

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Plasma and red blood cell β-endorphin immunoreactivity in normal and complicated pregnancies: Gestational age variation

Cited by 17 publications

References 13 publications

Late-Pregnancy Changes in Peripheral Plasma Beta-Endorphin in Rhesus Monkeys(Macaca mulatto)

Late-Pregnancy Changes in Peripheral Plasma Beta-Endorphin in Rhesus Monkeys(Macaca mulatto)

Peripartum Beta Endorphin levels in Relation to Labor Disorders and Post-Calving Reproductive Performance of Buffaloes.

Food Cravings, Endogenous Opioid Peptides, and Food Intake: A Review

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