Intravenous niacin acutely improves the efficiency of dietary fat storage in lean and obese humans

Robert H. Nelson, Danielle Vlazny, Almira Smailovic, John M. Miles

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Spillover of fatty acids released by lipoprotein lipase hydrolysis of meal triglycerides may be a major contributor to the free fatty acid (FFA) pool. We studied lean (n = 6) and overweight and obese (n = 5) subjects during continuous feeding on two occasions: during intravenous infusion of niacin (2.8 mg/min) and saline. After establishment of steady-state chylomicronemia and suppression of adipose tissue lipolysis with a liquid meal, spillover was measured with infusions of [U-13C]oleate and [3H]triolein. Total FFA concentrations were lower during niacin infusion in both lean (50 ± 4 vs. 102 ± 7 μmol/L; P < 0.002) and obese (75 ± 6 vs. 143 ± 13 μmol/L; P < 0.01) subjects. Oleate appearance was lower during niacin infusion than during saline infusion in both lean (21 ± 2 vs. 32 ± 5 μmol/min; P = 0.07) and obese subjects (25 ± 3 vs. 46 ± 8 μmol/min; P < 0.02). Spillover was lower during niacin infusion than during saline infusion in lean (21 ± 4 vs. 29 ± 3%) and obese (21 ± 2 vs. 29 ± 5%) subjects (P < 0.03 for both). In summary, during meal absorption, niacin produces additional suppression of lipolysis and a reduction in fractional spillover compared with saline in both normal and obese subjects. Infusion of intravenous niacin provides a model for acutely improving dietary fat storage, perhaps by suppressing lipolysis in visceral adipose tissue.

Original languageEnglish (US)
Pages (from-to)3172-3175
Number of pages4
JournalDiabetes
Volume61
Issue number12
DOIs
StatePublished - Dec 2012

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Niacin
Dietary Fats
Lipolysis
Meals
Oleic Acid
Nonesterified Fatty Acids
Intravenous Infusions
Triolein
Intra-Abdominal Fat
Lipoprotein Lipase
Adipose Tissue
Triglycerides
Hydrolysis
Fatty Acids

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism

Cite this

Intravenous niacin acutely improves the efficiency of dietary fat storage in lean and obese humans. / Nelson, Robert H.; Vlazny, Danielle; Smailovic, Almira; Miles, John M.

In: Diabetes, Vol. 61, No. 12, 12.2012, p. 3172-3175.

Research output: Contribution to journalArticle

Nelson, Robert H. ; Vlazny, Danielle ; Smailovic, Almira ; Miles, John M. / Intravenous niacin acutely improves the efficiency of dietary fat storage in lean and obese humans. In: Diabetes. 2012 ; Vol. 61, No. 12. pp. 3172-3175.
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