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  • Title: Ghrelin, glucose homeostasis, and carotid intima media thickness in kidney transplantation.
    Author: Genís BB, Granada ML, Alonso N, Lauzurica R, Jiménez JA, Barluenga E, Homs M, Pastor MC, Salinas I, Quintero JC, Sanmartí A, Romero R.
    Journal: Transplantation; 2007 Nov 27; 84(10):1248-54. PubMed ID: 18049109.
    Abstract:
    BACKGROUND: Abnormalities in glucose homeostasis (AGH) frequently occur in kidney transplantation and favor vascular lesions. The purpose of this study was to analyze whether C-reactive protein (CRP), adiponectin, and ghrelin are markers of AGH and indicators of carotid atherosclerosis in kidney transplant patients with fasting plasma glucose below 126 mg/dL. METHODS: This was a cross-sectional study of 85 kidney transplant patients (59 men; mean age: 52.4 +/- 11.6 years; median posttransplant follow-up 31 (range 3-61) months). All patients underwent an oral glucose tolerance test. Abnormalities in glucose homeostasis were diagnosed following American Diabetes Association criteria. CRP, adiponectin, and ghrelin levels were determined. Doppler ultrasound of the carotid artery was performed to determine intima media thickness (IMT) and atheromatous plaque. RESULTS: A total of 50.5% of patients had AGH (12.9% were diagnosed with new-onset diabetes mellitus after transplantation and 37.7% had impaired glucose tolerance or impaired fasting glucose), whereas 49.4% were normoglycemic. Patients with AGH were older (P=0.002), had greater carotid IMT (P=0.022), and lower ghrelin concentrations (P=0.017) than normoglycemic patients. Logistic regression analyses showed ghrelin to be an independent marker for AGH (P=0.012) and AGH to be related to greater IMT (P=0.041). No differences in adiponectin or CRP were found in relation to AGH or atherosclerosis; however, there was a positive correlation between adiponectin levels and prednisone dose (r=0.240; P=0.044). CONCLUSIONS: A total of 50.5% of the study patients had abnormalities in glucose homeostasis. Patients with AGH had a higher percentage of preclinical atherosclerosis (greater carotid IMT). Ghrelin is an independent marker for abnormalities in glucose homeostasis.
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