Plasma levels of arginines at term pregnancy in relation to mode of onset of labor and mode of childbirth.
arginines
dimethylarginines
mode of childbirth
mode of onset of labor
term pregnancy
Journal
American journal of reproductive immunology (New York, N.Y. : 1989)
ISSN: 1600-0897
Titre abrégé: Am J Reprod Immunol
Pays: Denmark
ID NLM: 8912860
Informations de publication
Date de publication:
09 2023
09 2023
Historique:
revised:
16
07
2023
received:
08
05
2023
accepted:
09
08
2023
medline:
31
8
2023
pubmed:
29
8
2023
entrez:
29
8
2023
Statut:
ppublish
Résumé
The exact biochemical mechanisms that initiate labor are not yet fully understood. Nitric oxide is a potent relaxant of uterine smooth muscles until labor starts, and its precursor is L-arginine. Asymmetric (ADMA) and symmetric (SDMA) dimethylarginines, are potent NO-inhibitors. However, arginines (dimethylarginines and L-arginine) are scarcely studied in relation to labor and childbirth. We aimed to investigate arginines in women with spontaneous (SLVB) and induced (ILVB) term labor with vaginal birth and in women undergoing elective caesarean section (ECS). Women at gestational week 16-18 were recruited to the population-based prospective cohort study BASIC at the Uppsala University Hospital, Sweden. Plasma samples taken at start of labor were analyzed for arginines, from SLVB (n = 45), ILVB (n = 45), and ECS (n = 45), using Ultra-High Performance Liquid Chromatography. Between-group differences were assessed using Kruskal-Wallis and Mann-Whitney U-test. Women with SLVB and ILVB had higher levels of ADMA (p < .0001), SDMA (p < .05) and lower L-arginines (p < .01), L-arginine/ADMA (p < .0001), and L-arginine/SDMA (p < .01, respectively <.001) compared to ECS. However, ILVB had higher ADMA (p < .0001) and lower L-arginine (p < .01), L-arginine/ADMA (p < .0001), and L-arginine/SDMA (p < .01) compared to SLVB. Results are adjusted for gestational length at birth and cervical dilatation at sampling. Our novel findings of higher levels of dimethylarginines in term vaginal births compared to ECS give insights into the biochemical mechanisms of labor. These findings might also serve as a basis for further studies of arginines in complicated pregnancies and labor.
Substances chimiques
Arginine
94ZLA3W45F
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e13767Informations de copyright
© 2023 The Authors. American Journal of Reproductive Immunology published by John Wiley & Sons Ltd.
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