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  • Title: A study into the nature and organ source of digoxin-like immunoreactive substance(s) in the perinatal period.
    Author: Seccombe DW, Pudek MR, Humphries KH, Matthewson B, Taylor GP, Jacobson BE, Whitfield MP.
    Journal: Biol Neonate; 1989; 56(3):136-46. PubMed ID: 2553137.
    Abstract:
    Digoxin-like immunoreactive substance(s) (DLIS) was isolated from sera and autopsy-derived tissue obtained from premature and full-term neonates. The highest tissue level of DLIS was in the small bowel followed by the adrenal, gallbladder and liver. Of the fluids examined, meconium had the highest level of DLIS. Preparative high performance liquid chromatography fractionation of cord blood generated at least six different fractions which not only contained DLIS material but also inhibited canine kidney Na+/K+-ATPase activity. Recovery/inhibition studies indicated that 72% of the canine kidney Na+/K+-ATPase inhibition within one fraction could be accounted for on the basis of progesterone content of the fraction.
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