Beneficial cardiac effects of caloric restriction are lost with age in a murine model of obesity

Majd AlGhatrif, Vabren L. Watts, Xiaolin Niu, Marc K Halushka, Karen L. Miller, Konrad Vandegaer, Djahida Bedja, Karen Fox-Talbot, Alicja Bielawska, Kathleen L Gabrielson, Lili Barouch

Research output: Contribution to journalArticle

Abstract

Obesity is associated with increased diastolic stiffness and myocardial steatosis and dysfunction. The impact of aging on the protective effects of caloric restriction (CR) is not clear. We studied 2-month (younger) and 6-7-month (older)-old ob/ob mice and age-matched C57BL/6J controls (WT). Ob/ob mice were assigned to diet ad libitum or CR for 4 weeks. We performed echocardiograms, myocardial triglyceride assays, Oil Red O staining, and measured free fatty acids, superoxide, NOS activity, ceramide levels, and Western blots. In younger mice, CR restored diastolic function, reversed myocardial steatosis, and upregulated Akt phosphorylation. None of these changes was observed in the older mice; however, CR decreased oxidative stress and normalized NOS activity in these animals. Interestingly, myocardial steatosis was not associated with increased ceramide, but CR altered the composition of ceramides. In this model of obesity, aging attenuates the benefits of CR on myocardial structure and function.

Original languageEnglish (US)
Pages (from-to)436-445
Number of pages10
JournalJournal of Cardiovascular Translational Research
Volume6
Issue number3
DOIs
StatePublished - Jun 2013

Fingerprint

Caloric Restriction
Obesity
Ceramides
Nonesterified Fatty Acids
Superoxides
Triglycerides
Oxidative Stress
Western Blotting
Phosphorylation
Staining and Labeling
Diet

Keywords

  • Caloric restriction
  • Diastolic dysfunction
  • Lipotoxicity
  • Obesity
  • Steatosis

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Genetics
  • Genetics(clinical)
  • Molecular Medicine
  • Pharmaceutical Science

Cite this

Beneficial cardiac effects of caloric restriction are lost with age in a murine model of obesity. / AlGhatrif, Majd; Watts, Vabren L.; Niu, Xiaolin; Halushka, Marc K; Miller, Karen L.; Vandegaer, Konrad; Bedja, Djahida; Fox-Talbot, Karen; Bielawska, Alicja; Gabrielson, Kathleen L; Barouch, Lili.

In: Journal of Cardiovascular Translational Research, Vol. 6, No. 3, 06.2013, p. 436-445.

Research output: Contribution to journalArticle

AlGhatrif, Majd ; Watts, Vabren L. ; Niu, Xiaolin ; Halushka, Marc K ; Miller, Karen L. ; Vandegaer, Konrad ; Bedja, Djahida ; Fox-Talbot, Karen ; Bielawska, Alicja ; Gabrielson, Kathleen L ; Barouch, Lili. / Beneficial cardiac effects of caloric restriction are lost with age in a murine model of obesity. In: Journal of Cardiovascular Translational Research. 2013 ; Vol. 6, No. 3. pp. 436-445.
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