Transfer of hydrophilic molecules by placenta and yolk sac of the guinea pig

Kent Thornburg, J. J. Faber

    Research output: Contribution to journalArticle

    48 Citations (Scopus)

    Abstract

    Prenatal transfer of hydrophilic materials was studied in chronic guinea pig preparations of ca. 30-65 days gestation. In most preparations the vitelline (yolk sac placenta) circulation of one of the fetuses was ligated between 1 and 20 days before the experiment. Fetal and maternal serum protein concentrations were recorded as a function of the number of days after ligation. Prenatal transfer of hyrophilic materials of 60-5,500 daltons molecular wt was consistent with diffusion, with some evidence of steric restriction of the larger molecules. There was no difference between operated and sham-operated or control fetuses. However, the transfer of radiolabeled homologous gamma globulin ceased after ligation of the yolk sac vessels. The transfer in control fetuses accounted for most of the prenatal requirements of this protein, as calculated from the increases in fetal weight and serum gamma globulin concentrations as a function of gestational age. There was evidence of a nonspecific suppression of yolk sac function by surgery but no evidence of fetal catabolism of gamma globulin.

    Original languageEnglish (US)
    Pages (from-to)111-124
    Number of pages14
    JournalAmerican Journal of Physiology - Cell Physiology
    Volume2
    Issue number2
    StatePublished - 1977

    Fingerprint

    Yolk Sac
    gamma-Globulins
    Placenta
    Guinea Pigs
    Fetus
    Molecules
    Ligation
    Serum Globulins
    Fetal Weight
    Surgery
    Gestational Age
    Blood Proteins
    Mothers
    Pregnancy
    Proteins
    Experiments

    ASJC Scopus subject areas

    • Cell Biology
    • Clinical Biochemistry
    • Physiology

    Cite this

    Transfer of hydrophilic molecules by placenta and yolk sac of the guinea pig. / Thornburg, Kent; Faber, J. J.

    In: American Journal of Physiology - Cell Physiology, Vol. 2, No. 2, 1977, p. 111-124.

    Research output: Contribution to journalArticle

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