Placental alkaline phosphatase (PLAP), encoded by the ALPP gene, is produced by the fetal side of the placenta. This enzyme displays strong genetic variability. Some of the variants were reported to be associated with pathology of pregnancy. We show here that the two most common ALPP allelic variants, Pl(1) and Pl(2), differ in mRNA expression level. This differential expression was independent of the parental origin and probably results from linkage disequilibrium with the sequence variation rs2014683G>A in the ALPP gene promoter that was shown to have allele-specific binding patterns to placental nuclear proteins. The possible role of this allelic-specific expression in placenta-related pathology is discussed.
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| http://dx.doi.org/10.1016/j.placenta.2010.06.012 | DOI Listing |
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