Authors: J van Ark J Moser C P H Lexis F Bekkema I Pop I C C van der Horst C J Zeebregts H van Goor B H R Wolffenbuttel J L Hillebrands
Publish Date: 2012/06/01
Volume: 55, Issue: 9, Pages: 2501-2512
Abstract
Individuals with type 2 diabetes mellitus have increased rates of macrovascular disease MVD Endothelial progenitor cells EPCs circulating angiogenic cells CACs and smooth muscle progenitor cells SMPCs are suggested to play a role in the pathogenesis of MVD The relationship between vasoregenerative EPCs or CACs and damaging SMPCs and the development of accelerated MVD in diabetes is still unknown We tried to elucidate whether EPC CAC and SMPC numbers and differentiation capacities in vitro differ in patients with and without diabetes or MVDPeripheral blood was obtained from insdividuals with and without diabetes and MVD coronary or peripheral artery disease EPC and SMPC numbers were determined with flow cytometry Furthermore CAC and SMPC numbers were quantified after in vitro culture Their in vitro differentiation capacity was investigated with realtime RTPCR and quantitative immunofluorescenceIn diabetic patients both EPC and CAC levels were reduced 13fold p 005 and 15fold p 005 respectively CAC outgrowth from diabetic patients with MVD was reduced 15fold compared with diabetic patients without MVD p 005 SMPC levels were similar between diabetic patients and healthy controls The CAC/SMPC ratio of in vitro cultured progenitor cells was reduced 23fold in samples from diabetic patients p 0001 The differentiation capacity of CACs and SMPCs in vitro remained similar independently of diabetes or MVD
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