Abstract
Prolactin (PRL) is necessary for the genesis of mammary alveolar buds and for lactation. A cDNA library enriched for PRL-dependent genes was made by suppression subtractive hybridization. Aldolase C/zebrin (AldC/zebrin), a “brain-specific” aldolase, was found to be PRL-dependent in the mouse mammary glands. AldC/zebrin was preferentially expressed in the alveolar buds. Expression of the gene in the ovary was also evident. During pregnancy, mammary AldC/zebrin mRNA levels were elevated beginning at midpregnancy (d 10 of pregnancy) in accordance with the genesis of the lobuloalveolar system, and the expression level was gradually increased through the end of pregnancy. Lactating mammary gland contained a very high level of AldC/zebrin mRNA, and the gene expression decreased during involution. By contrast, levels of aldolase A and B mRNA expression in the mammary glands were less affected by pregnancy and lactation. The selective regulation of AldC/zebrin may contribute to a shift in nutrient metabolism during pregnancy and lactation to facilitate epithelial growth and biosynthesis of milk constituents.
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Matsuda, M., Lockefeer, J.A. & Horseman, N.D. Aldolase C/zebrin gene regulation by prolactin during pregnancy and lactation. Endocr 20, 91–100 (2003). https://doi.org/10.1385/ENDO:20:1-2:91
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DOI: https://doi.org/10.1385/ENDO:20:1-2:91