Rising maternal circulating GH during murine pregnancy suggests placental regulation

Kathryn L. Gatford, Beverly Muhlhausler, Lili Huang, Pamela Su Lin Sim, Claire T. Roberts, Johannes D. Velhuis, Chen Chen

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Placenta-derived hormones including growth hormone (GH) in humans contribute to maternal adaptation to pregnancy, and intermittent maternal GH administration increases foetal growth in several species. Both patterns and abundance of circulating GH are important for its activity, but their changes during pregnancy have only been reported in humans and rats. The aim of the present study was to characterise circulating profiles and secretory characteristics of GH in non-pregnant female mice and throughout murine pregnancy. Circulating GH concentrations were measured in whole blood (2 μL) collected every 10 min for 6 h in non-pregnant diestrus female C57Bl/6J mice (n = 9), and pregnant females at day 8.5–9.5 (early pregnancy, n = 8), day 12.5–13.5 (mid-pregnancy, n = 7) and day 17.5 after mating (late pregnancy, n = 7). Kinetics and secretory patterns of GH secretion were determined by deconvolution analysis, while orderliness and regularity of serial GH concentrations were calculated by approximate entropy analysis. Circulating GH was pulsatile in all groups. Mean circulating GH and total and basal GH secretion rates increased markedly from early to mid-pregnancy, and then remained elevated. Pulse frequency and pulsatile GH secretion rate were similar between groups. The irregularity of GH pulses was higher in all pregnant groups than that in non-pregnant mice. Increased circulating GH in murine pregnancy is consistent with an important role for this hormone in maternal adaptation to pregnancy and placental development. The timing of increased basal secretion from mid-pregnancy, concurrent with the formation of the chorioallantoic placenta and initiation of maternal blood flow through it, suggests regulation of pituitary secretion by placenta-derived factors.

    LanguageEnglish
    Pages260-266
    Number of pages7
    JournalEndocrine Connections
    Volume6
    Issue number4
    DOIs
    Publication statusPublished - 1 May 2017

    Keywords

    • Growth hormone
    • Mouse
    • Placenta
    • Pregnancy
    • Profile

    ASJC Scopus subject areas

    • Endocrinology
    • Internal Medicine
    • Endocrinology, Diabetes and Metabolism

    Cite this

    Gatford, K. L., Muhlhausler, B., Huang, L., Sim, P. S. L., Roberts, C. T., Velhuis, J. D., & Chen, C. (2017). Rising maternal circulating GH during murine pregnancy suggests placental regulation. Endocrine Connections, 6(4), 260-266. https://doi.org/10.1530/EC-17-0032
    Gatford, Kathryn L. ; Muhlhausler, Beverly ; Huang, Lili ; Sim, Pamela Su Lin ; Roberts, Claire T. ; Velhuis, Johannes D. ; Chen, Chen. / Rising maternal circulating GH during murine pregnancy suggests placental regulation. In: Endocrine Connections. 2017 ; Vol. 6, No. 4. pp. 260-266.
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    Gatford, KL, Muhlhausler, B, Huang, L, Sim, PSL, Roberts, CT, Velhuis, JD & Chen, C 2017, 'Rising maternal circulating GH during murine pregnancy suggests placental regulation', Endocrine Connections, vol. 6, no. 4, pp. 260-266. https://doi.org/10.1530/EC-17-0032

    Rising maternal circulating GH during murine pregnancy suggests placental regulation. / Gatford, Kathryn L.; Muhlhausler, Beverly; Huang, Lili; Sim, Pamela Su Lin; Roberts, Claire T.; Velhuis, Johannes D.; Chen, Chen.

    In: Endocrine Connections, Vol. 6, No. 4, 01.05.2017, p. 260-266.

    Research output: Contribution to journalArticle

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