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Viruses in the human gut show dynamic response to diet

Date:
August 31, 2011
Source:
Cold Spring Harbor Laboratory
Summary:
The digestive system is home to a myriad of viruses, but how they are involved in health and disease is poorly understood. Researchers have now investigated the dynamics of virus populations in the human gut, shedding new light on the gut "virome" and how it differs between people and responds to changes in diet.
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The digestive system is home to a myriad of viruses, but how they are involved in health and disease is poorly understood. In a study published online August 30 in Genome Research, researchers have investigated the dynamics of virus populations in the human gut, shedding new light on the gut "virome" and how it differs between people and responds to changes in diet.

"Our bodies are like coral reefs," said Dr. Frederic Bushman of the Perelman School of Medicine at the University of Pennsylvania, senior author of the study, "inhabited by many diverse creatures interacting with each other and with us." The interactions between viruses, bacteria, and the human host likely have significant consequences for human health and disease, especially in the delicate ecosystem of the gut microbiome.

In this work, lead author Sam Minot, Bushman, and colleagues investigated the dynamics of the gut virome during perturbations to diet. The group studied six healthy volunteers -- some received a high fat and low fiber diet, others a low fat and high fiber diet, and one an ad-lib diet.

By analyzing DNA sequences from viruses and bacteria present in stool of the volunteers over the course of eight days, they found that although the largest variation in virus diversity observed occurred between individuals, over time dietary intervention significantly changed the proportions of virus populations in individuals on the same diet, so that the viral populations became more similar.

"The study provides a new window on the vast viral populations that live in the human gut, demonstrates that they vary radically between individuals, and shows that dietary changes can affect not just bacterial populations but also viral populations," Bushman said.

Scientists from the Perelman School of Medicine at the University of Pennsylvania (Philadelphia, PA) contributed to this study.

This work was supported by the Human Microbiome Roadmap Demonstration Project, the Pennsylvania Department of Health, the National Institutes of Health, and the Molecular Biology Core of The Center for Molecular Studies in Digestive and Liver Diseases.


Story Source:

The above post is reprinted from materials provided by Cold Spring Harbor Laboratory. Note: Materials may be edited for content and length.


Journal Reference:

  1. Minot S, Sinha R, Chen J, Li H, Keilbaugh SA, Wu G, Lewis J, Bushman FD. The human gut virome: Inter-individual variation and dynamic response to diet. Genome Res, August 31, 2011 DOI: 10.1101/gr.122705.111

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Cold Spring Harbor Laboratory. "Viruses in the human gut show dynamic response to diet." ScienceDaily. ScienceDaily, 31 August 2011. <www.sciencedaily.com/releases/2011/08/110830193847.htm>.
Cold Spring Harbor Laboratory. (2011, August 31). Viruses in the human gut show dynamic response to diet. ScienceDaily. Retrieved July 31, 2015 from www.sciencedaily.com/releases/2011/08/110830193847.htm
Cold Spring Harbor Laboratory. "Viruses in the human gut show dynamic response to diet." ScienceDaily. www.sciencedaily.com/releases/2011/08/110830193847.htm (accessed July 31, 2015).

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