Abstract
Placenta growth factor (P1GF) and vascular endothelial growth factor (VEGF) are angiogenic factors containing the 8-cysteine motif of platelet-derived growth factor (PDGF). Both P1GF and VEGF are mitogens for endothelial cells in vitro and promote neoangiogenesis in vivo. In addition, PIGF strongly potentiates the proliferative and the permeabilization effects exerted by VEGF on the vascular endothelium. We have now isolated the cDNA coding for mouse Plgf by screening a mouse heart cDNA library with the human P1GF sequence as probe. The human P1GF protein has two forms, P1GF-1 and P1GF-2, that arise from alternative splicing of a single gene mapping on Chromosome (Chr) 14; the isolated mouse Plgf cDNA encodes the longer of these two forms (PIGF-2). We show that the mouse Plgf- 2 mRNA is the only transcript present in the normal tissues analyzed. Mouse Plgf-2 is a 158-amino-acid-long protein that shows 78% similarity (65% identity) to the human P1GF-2. Computer analysis reveals a putative signal peptide and three probable N-glycosylation sites, two of which are also conserved in human P1GF. The mouse Plgf gene was isolated and characterized; the gene is encoded by 7 exons spanning a 13-kb DNA interval. Finally, we have mapped the mouse Plgf gene to Chr 12, one cM from D12Mit5, and the human P1GF gene to 14q24, using both FISH and genetic crosses.
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DiPalma, T., Tucci, M., Russo, G. et al. The placenta growth factor gene of the mouse. Mammalian Genome 7, 6–12 (1996). https://doi.org/10.1007/s003359900003
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DOI: https://doi.org/10.1007/s003359900003