Posts Tagged ‘Calorie-restriction’

Study: Fat maintenance is a predictor of the murine lifespan response to dietary restriction

Thursday, June 16th, 2011

This article archives the study titled: Fat maintenance is a predictor of the murine lifespan response to dietary restriction:

1) Article

Article: Mouse study turns fat-loss/longevity link on its head – Science Daily, 5/3/11

“studied the effect of food restriction on fat and weight loss in 41 genetically different strains of mice. The scientists then correlated the amount of fat reduction to life span … The answer: Mice that maintained their fat actually lived longer. Those that lost fat died earlier … People are best advised to adopt a moderate approach, not losing all fat but definitely not keeping unhealthy amounts of fat, either … None of the mice in this study were what we would consider to be obese”

Archived article: Mouse-Study-Turns-Fat-Loss-longevity-Link-on-Its-Head.pdf

2) Journal reference:

Chen-Yu Liao, Brad A. Rikke, Thomas E. Johnson, Jonathan A.L. Gelfond, Vivian Diaz, James F. Nelson. Fat Maintenance Is a Predictor of the Murine Lifespan Response to Dietary Restriction. Aging Cell, 2011; DOI: 10.1111/j.1474-9726.2011.00702.x

Journal Summary:

Fat maintenance is a predictor of the murine lifespan response to dietary restriction     1. Chen-Yu Liao1,2,    2. Brad A. Rikke3,    3. Thomas E. Johnson3,4,    4. Jonathan A. L. Gelfond2,5,    5. Vivian Diaz2,    6. James F. Nelson1,2  Article first published online: 25 APR 2011  DOI: 10.1111/j.1474-9726.2011.00702.x

Calorie Restriction Research

Tuesday, May 24th, 2011

Additional research on Calorie Restriction.

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Abstracts: (more…)

Insulin Levels and Life Span Studies

Tuesday, December 14th, 2010

Sci. Aging Knowl. Environ., 4 August 2004
Vol. 2004, Issue 31, p. re5
[DOI: 10.1126/sageke.2004.31.re5]


Murine Models of Life Span Extension

Jason K. Quarrie, and Karl T. Riabowol

The authors are in the Department of Biochemistry and Molecular Biology at the University of Calgary, Calgary, Alberta, Canada, T2N 4N1. E-mail: (K.T.R.)

Key Words: life span extension • mouse models • growth hormone • insulin-like growth factor • oxidative damage • caloric restriction

Abstract: Mice are excellent experimental models for genetic research and are being used to investigate the genetic component of organismal aging. Several mutant mice are known to possess defects in the growth hormone/insulin-like growth factor 1 (GH/IGF-1) neurohormonal pathway and exhibit dwarfism together with extended life span. Their phenotypes resemble those of mice subjected to caloric restriction. Targeted mutations that affect components of this pathway, including the GH receptor, p66Shc, and the IGF-1 receptor (IGF-1R), also extend life span; mutations that affect IGF-1R or downstream components of the pathway decouple longevity effects from dwarfism. These effects on life span may result from an increased capacity to resist oxidative damage.

Citation: J. K. Quarrie, K. T. Riabowol, Murine Models of Life Span Extension. Sci. Aging Knowl. Environ. 2004 (31), re5 (2004)



Calorie-restriction, Protein-restriction and free-IGF-1 / SHBG

Monday, November 22nd, 2010

Studies pertaining to Calorie-restriction (CR), Protein-restriction (PR) and free-IGF-1 and SHBG.


Br J Cancer. 2000 Jul;83(1):95-7.
Hormones and diet: low insulin-like growth factor-I but normal bioavailable androgens in vegan men.

Allen NE, Appleby PN, Davey GK, Key TJ.
Cancer Epidemiology Unit, Imperial Cancer Research Fund, Radcliffe Infirmary, Oxford, UK.


Mean serum insulin-like growth factor-I was 9% lower in 233 vegan men than in 226 meat-eaters and 237 vegetarians (P = 0.002).

Vegans had higher testosterone levels than vegetarians and meat-eaters, but this was offset by higher sex hormone binding globulin, and there were no differences between diet groups in free testosterone, androstanediol glucuronide or luteinizing hormone.

PMID: 10883675 [PubMed - indexed for MEDLINE]PMCID: PMC2374537

Full text PDF:
PDF file: Hormones and diet-83-6691152a.pdf


Aging Cell. 2008 Oct;7(5):681-7.
Long-term effects of calorie or protein restriction on serum IGF-1 and IGFBP-3 concentration in humans.

Fontana L, Weiss EP, Villareal DT, Klein S, Holloszy JO.


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