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Clinical determinants and mortality predictability of stearoyl-CoA desaturase-1 activity indices in dialysis patients.
MedLine Citation:
PMID:  22897446     Owner:  NLM     Status:  Publisher    
BACKGROUND: Stearoyl-CoA desaturase-1 (SCD-1) converts dietary saturated fatty acids to monounsaturated fatty acids. Elevated SCD-1 activity thus signifiesimpaired fatty acid metabolism and excess saturated fat intake. In the general population,increased SCD-1 activity is associated with cardiovascular disease and mortality. The determinants and implications of SCD-1 activity in dialysis patients are unknown. SUBJECTS: A total of222 dialysis patients (39% women) with prospective follow-up, median age of 57 years and an average of 12 months of dialysis. DESIGN: Fatty acid compositions in plasma phospholipids and free fatty acids (FFAs) were assessed by gas-liquid chromatography. SCD-1 activity indices were calculated asthe product-to-precursor fatty acid ratio (palmitoleic acid/palmitic acid) in each fraction to reflect SCD-1 activities in the liver and adipose tissue. RESULTS: Median hepatic and adipose tissue SCD-1 activity indices were 0.016 and 0.150, respectively. In multivariate analyses, SCD-1 was positively associated with age, female sex and serum interleukin-6 level. During 18.4 (interquartile range5.5-37.3) months of follow-up, there were 61 deaths and 115 kidney transplants. The cut-off level for high SCD-1 indices was determined by receiver operating characteristic curve analyses. In fully adjusted competing risk models, patients with high SCD-1 indices in both phospholipids and FFAs had more than two-fold increased mortality risk before kidney transplantation [hazard ratio (HR)2.29, 95% confidence interval (CI) 1.28-4.11 and HR 2.36, 95% CI 1.38-4.03, respectively],compared with patients with low SCD-1 indices. CONCLUSIONS: Both hepatic and adipose tissue SCD-1 activity indices independently predict mortality in dialysis patients. Further studies are warranted to determine whether reducing SCD-1 activity by dietary intervention(limiting saturated fat) could improve survival in dialysis patients. © 2012 The Association for the Publication of the Journal of Internal Medicine.
Xiaoyan Huang; Peter Stenvinkel; Abdul Rashid Qureshi; Tommy Cederholm; Peter Bárány; Olof Heimbürger; Bengt Lindholm; Ulf Risérus; Juan Jesús Carrero
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-17
Journal Detail:
Title:  Journal of internal medicine     Volume:  -     ISSN:  1365-2796     ISO Abbreviation:  J. Intern. Med.     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8904841     Medline TA:  J Intern Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 The Association for the Publication of the Journal of Internal Medicine.
Divisions of Renal Medicine and Baxter Novum, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet, Stockholm.
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