Abstract:
:Biomineralization of the extracellular matrix is an essential, regulated process. Inappropriate mineralization of bone and the vasculature has devastating effects on patient health, yet an integrated understanding of the chemical and cell biological processes that lead to mineral nucleation remains elusive. Here, we report that biomineralization of bone and the vasculature is associated with extracellular poly(ADP-ribose) synthesized by poly(ADP-ribose) polymerases in response to oxidative and/or DNA damage. We use ultrastructural methods to show poly(ADP-ribose) can form both calcified spherical particles, reminiscent of those found in vascular calcification, and biomimetically calcified collagen fibrils similar to bone. Importantly, inhibition of poly(ADP-ribose) biosynthesis in vitro and in vivo inhibits biomineralization, suggesting a therapeutic route for the treatment of vascular calcifications. We conclude that poly(ADP-ribose) plays a central chemical role in both pathological and physiological extracellular matrix calcification.
journal_name
Cell Repjournal_title
Cell reportsauthors
Müller KH,Hayward R,Rajan R,Whitehead M,Cobb AM,Ahmad S,Sun M,Goldberga I,Li R,Bashtanova U,Puszkarska AM,Reid DG,Brooks RA,Skepper JN,Bordoloi J,Chow WY,Oschkinat H,Groombridge A,Scherman OA,Harrison JA,Verhulstdoi
10.1016/j.celrep.2019.05.038subject
Has Abstractpub_date
2019-06-11 00:00:00pages
3124-3138.e13issue
11issn
2211-1247pii
S2211-1247(19)30658-8journal_volume
27pub_type
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