Intrahepatic lipid, not visceral or muscle fat, is correlated with insulin resistance in older, female rhesus macaques

Michael P. Chu, Bethany Klopfenstein, Christine M. Krisky, Henryk Urbanski, William Rooney, Steven Kohama, Jonathan Purnell

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Objective Little is known of the effect of body composition on glucose metabolism in the aging female non-human primate. These variables in older female Rhesus macaques were studied. Design and Methods Female Rhesus macaques (Macaca mulatta, n = 19, age range 23-30 years) underwent magnetic resonance imaging and 1H spectroscopy to quantify total abdominal fat, visceral fat (VF), subcutaneous fat (SF) area, extramyocellular lipid (EMCL), intramyocellular lipid (IMCL) and intrahepatic lipid (IHL) content, and DEXA scan for whole body composition. A subgroup (n = 12) underwent a fasting blood draw and intravenous glucose tolerance test. Results SF correlated with homeostatic model assessment of insulin resistance (HOMAIR) and quantitative insulin sensitivity check index (QUICKI), but not after adjustment for fat mass. IHL demonstrated the strongest correlation with HOMAIR, QUICKI and calculated insulin sensitivity index (CSI), and remained significant after adjustment for fat mass. VF, IMCL, and EMCL did not correlate with any of our measures of insulin sensitivity. Conclusions Despite a greater amount of VF compared to SF, VF was not associated with markers of insulin resistance (IR) in the older female monkey. Instead, IHL is a marker for IR in the fasting and post-prandial state in these animals.

Original languageEnglish (US)
Pages (from-to)2021-2028
Number of pages8
JournalObesity
Volume21
Issue number10
DOIs
StatePublished - Oct 2013

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Macaca mulatta
Insulin Resistance
Fats
Lipids
Muscles
Intra-Abdominal Fat
Subcutaneous Fat
Body Composition
Fasting
Abdominal Fat
Photon Absorptiometry
Glucose Tolerance Test
Primates
Haplorhini
Meals
Spectrum Analysis
Magnetic Resonance Imaging
Glucose

ASJC Scopus subject areas

  • Endocrinology
  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

Cite this

Intrahepatic lipid, not visceral or muscle fat, is correlated with insulin resistance in older, female rhesus macaques. / Chu, Michael P.; Klopfenstein, Bethany; Krisky, Christine M.; Urbanski, Henryk; Rooney, William; Kohama, Steven; Purnell, Jonathan.

In: Obesity, Vol. 21, No. 10, 10.2013, p. 2021-2028.

Research output: Contribution to journalArticle

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T1 - Intrahepatic lipid, not visceral or muscle fat, is correlated with insulin resistance in older, female rhesus macaques

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AU - Klopfenstein, Bethany

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AU - Rooney, William

AU - Kohama, Steven

AU - Purnell, Jonathan

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