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Novel short-term effects of adenovirus Ad-36 on hamster lipoproteins

International Journal of Obesity volume 28, pages 1521–1527 (2004)Cite this article

Abstract

OBJECTIVE: Human adenovirus Ad-36 induces adiposity and lowers total serum cholesterol in chickens, mice and marmosets and Ad-36 antibodies are associated with human obesity. We examined the early effects of Ad-36 inoculation on plasma cholesterol levels in hamsters fed a hyperlipidemic diet.

DESIGN: A total of 32 male Golden Syrian hamsters were divided into two equal weight-matched groups and intranasally inoculated with Ad-36 (INF: infected) or media (CON: control). In each group, the animals were fed either a purified diet (PF, n=8) 40%en fat ±194 mg cholesterol/1000 kcal or chow (C, n=8) ad libitum. Animals were killed 5 weeks postinoculation.

RESULTS: Nested PCR assay detected Ad-36 DNA in the lung, liver, visceral adipose tissue and skeletal muscle of the INF group, but not in the CON animals. Ad-36 antibodies were detected in the INF group only. For all animals, total plasma cholesterol (TC) was not significantly affected by Ad-36 treatment (203±92 vs 193±75 mg/dl, P=NS; INF vs CON, respectively). In 5 weeks, Ad-36 infection had no effect on TC concentration in hamsters fed chow (128±39 vs 130±27 mg/dl, INF-C vs CON-C, respectively) or those fed PF (269±70 vs 256±47 mg/dl, INF-P vs CON-P, respectively). However, lipoproteins isolated by density gradient ultracentrifugation showed a greater proportion of LDL cholesterol in INF animals, as compared to CON (28.4±1.6% vs 16.4±1.2%, P=0.02), regardless of dietary treatment (INF-P vs CON-P: 27.3±2.1 vs 15.7±1.5%, P=0.07; and INF-C vs CON-C: 29.4±1.2 vs 17.0±1.1%, P=0.009). This shift appears to be from HDL cholesterol to the LDL fractions.

CONCLUSION: These data suggest that in the hamster (a model resembling several aspects of human lipoprotein metabolism), Ad-36 infection may acutely affect the intravascular processing of lipoproteins resulting in a more atherogenic lipoprotein profile.

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Authors and Affiliations

  1. Department of Nutrition and Food Science, Wayne State University, Detroit, MI, USA

    M Kapila, P Khosla & N V Dhurandhar

  2. Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI, USA

    N V Dhurandhar

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  1. M Kapila
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  2. P Khosla
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Correspondence to N V Dhurandhar.

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Kapila, M., Khosla, P. & Dhurandhar, N. Novel short-term effects of adenovirus Ad-36 on hamster lipoproteins. Int J Obes 28, 1521–1527 (2004). https://doi.org/10.1038/sj.ijo.0802710

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