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Diabetic Bone Marrow & Stem Cell Dysfunction, Meghan A. Piccinin
Diabetic Bone Marrow & Stem Cell Dysfunction, Meghan A. Piccinin
Electronic Thesis and Dissertation Repository
ii Abstract Abstract Defects in the proliferation, differentiation, and activity of bone marrow (BM)-derived vasculogenic/vascular stem cells (VSCs) have been observed in diabetes and contribute to the development of vascular complications. Diabetes leads to enhanced bone marrow adipogenesis, altering the composition of the BM stem cell (SC) niche and potentially disrupting the normal functioning of resident VSCs. Here, I establish that adipocytes have a negative influence on SC survival in culture. I also show that adipocytes and osteoblasts are responsible for the creation of distinct extracellular microenvironments, with unique expression patterns of several pro- and anti-angiogenic factors with known effects …
Nerve Blood Flow Control In Health & Disease:The Effects Of Type 1 Diabetes And Exercise Training, Terry D. Olver
Nerve Blood Flow Control In Health & Disease:The Effects Of Type 1 Diabetes And Exercise Training, Terry D. Olver
Electronic Thesis and Dissertation Repository
Peripheral nerve blood flow (NBF) is critical to nerve health. Impaired NBF control may contribute to the progression of diabetes peripheral neuropathy. The purposes of this dissertation were: i) to investigate the acute and chronic effects of hyperglycemia on basal sciatic NBF (measured via Doppler ultrasound), ii) to examine the potential vasodilatory effects of insulin (euglycemic hyperinsulinemic clamp; 10 mµ•kg-1•min-1) on NBF control in healthy rats and rats with insulin-treated type 1 diabetes (DS) and iii) to determine if exercise training (~75% VO2max, 60 min/day, 5 days/wk for 10 wk) improves vasa nervorum reactivity …