Abstract:
:Transforming growth factor beta 1 (TGF-beta 1) is a platelet-derived cytokine involved in both normal wound healing and scarring. We show that human platelets contain two pools of latent TGF-beta 1, which constitute more than 95% of the total TGF-beta assayed in whole platelets. During clotting, one pool, the large latent TGF-beta complex consisting of latent TGF-beta binding protein (LTBP), the latency-associated peptide (LAP) and the 25-kD mature TGF-beta 1 dimer is released into the serum. A second pool, which contains LAP but not LTBP, is retained in the clot, but can be released by RGD peptide. When the clot is dissolved by plasmin this bound TGF-beta 1 is gradually activated and released. If similar mechanisms operate in vivo, the clot will act as a slow-release capsule of TGF-beta 1 activity during wound healing.
journal_name
Nat Medjournal_title
Nature medicineauthors
Grainger DJ,Wakefield L,Bethell HW,Farndale RW,Metcalfe JCdoi
10.1038/nm0995-932subject
Has Abstractpub_date
1995-09-01 00:00:00pages
932-7issue
9eissn
1078-8956issn
1546-170Xjournal_volume
1pub_type
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