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  • Title: [Humoral factors of immunity in maternal milk. Comparison of their levels in the breast milk of mothers with premature and at-term delivery].
    Author: Sann L, Bienvenu F, Maurice M, Lahet C, Baltassat P.
    Journal: Pediatrie; 1983 Dec; 38(8):533-9. PubMed ID: 6609344.
    Abstract:
    Eight proteins (Immunoglobulin A, G, M, C3 and C4 fractions of complement, alpha 1-glycoprotein, lactoferrin and alpha 1- antitrypsin) were measured by immuno-diffusion or laser nephelometry in 50 milk samples. Thirty nine were heated thrice at 62 degrees C for 20 minutes. Twenty six came from mothers who delivered prematurely (less than 37 weeks) and 13 from mothers who delivered at term. Eleven samples were, used to determine the effect of the heating process. There was no significative difference of the concentrations of the eight proteins between the breast milk obtained at term or prematurely, even when the comparisons were made between colostral milks or transitional milks. The heating process reduced the concentration by 47 % for IgA, more than 88 % for IgG and IgM, 41 to 74 % for the other proteins; only orosomucoid seemed little affected (-16 %). These data suggest that the heating process impairs the immunologic effect of breast milk. This effect must be particularly considered in regard to the absence of any significant difference between the milks obtained at term or prematurely.
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