Journal
NATURE GENETICS
Volume 34, Issue 4, Pages 379-381Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ng1221
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Idiopathic infantile arterial calcification (IIAC; OMIM 208000) is characterized by calcification of the internal elastic lamina of muscular arteries and stenosis due to myointimal proliferation. We analyzed affected individuals from 11 unrelated kindreds and found that IIAC was associated with mutations that inactivated ecto-nucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1). This cell surface enzyme generates inorganic pyrophosphate (PPi), a solute that regulates cell differentiation and serves as an essential physiologic inhibitor of calcification.
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