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Discover 21,047 clinical trials near Pittsburgh, Pennsylvania. Find research studies in your area.
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NCT01312051
Blacks are at increased risk for obesity, type 2 diabetes mellitus and cardiovascular disease. A common pathogenetic link among these entities is insulin resistance/hyperinsulinemia. The specific aims of this project are: 1) to compare skeletal muscle lipid content (SMLC) in black vs white children by computed tomography (CT) scan of the mid-thigh, and assess the relationship to in vivo insulin sensitivity; 2) to test the hypothesis that free fatty acid (FFA) - induced insulin resistance is associated with larger increases in intramyocellular lipid (IMCL) in black vs white adolescents; 3) to examine if β-cell insulin secretion in prepubertal black children is more sensitive to the stimulatory effect of FFA than in whites; and 4) to test if the β-cell in black obese adolescents is more susceptible to the lipotoxic effect of FFA compared with whites. The methods to be used are: the well- established CT method as well as Magnetic Resonance Spectroscopy (1H-MRS) to assess SMLC and IMCL; intralipid infusion to elevate circulating FFA levels; the hyperinsulinemic-euglycemic clamp with stable isotopes and indirect calorimetry to measure insulin sensitivity and substrate turnover; the hyperglycemic clamp to assess insulin secretion; DEXA and whole body MRI for body composition assessments.
NCT00917618
Hypothesis: Group cycling classes (Spinning®) will improve pain and functional outcomes in patients with knee osteoarthritis Methods: Patients with symptomatic knee OA will be randomized to active Spinning® classes 2-3 per week or control group for 3 months. Outcomes including gait speed, WOMAC, KOOS, KOS, and VAS pain at rest and after 6 min walk will be performed at baseline and at 12 weeks.