Featured Research

from universities, journals, and other organizations

Dogs Lived 1.8 Years Longer On Low Calorie Diet: Gut Flora May Explain It

Date:
April 20, 2007
Source:
Imperial College London
Summary:
Changes caused to bugs in the gut by restricting calorie intake may partly explain why dietary restriction can extend lifespan, according to new analysis from a life-long project looking at the effects of dietary restriction on Labrador Retriever dogs.

Study found that dogs on a diet lived on average 1.8 years longer than those with a greater calorie intake.
Credit: Michele Hogan

Changes caused to bugs in the gut by restricting calorie intake may partly explain why dietary restriction can extend lifespan, according to new analysis from a life-long project looking at the effects of dietary restriction on Labrador Retriever dogs.

Related Articles


Bugs in the gut are known as gut microbes and they live symbiotically in human and animal bodies, playing an important role in metabolism. Abnormalities in some types of gut microbes have recently been linked to diseases such as diabetes and obesity.

Today's research, published in the Journal of Proteome Research, was based on a study in which 24 dogs were paired, with one dog in each pair given 25% less food than the other. Those with a restricted intake of calories lived, on average, about 1.8 years longer than those with a greater intake and they had fewer problems with diseases such as diabetes and osteoarthritis, plus an older median age for onset of late-life diseases.

The researchers, from Imperial College London, Nestlé Research Center (NRC) and Nestlé-Purina, found long-term differences in the metabolism of the dietary-restricted and non-dietary-restricted dogs. Metabolic profile plays a key role in determining animals' response to illness and their susceptibility to disease.

The scientists believe that differences in the makeup of gut microbes between the two sets of dogs could partly explain their metabolic differences. The dogs that were not on a restricted diet had increased levels of potentially unhealthy aliphatic amines in their urine. These reflect reduced levels of a nutrient that is essential for metabolising fat, known as choline, indicating the presence of a certain makeup of gut microbe in the dogs. This makeup of gut microbes has been associated in recent studies with the development of insulin resistance and obesity.

Professor Jeremy Nicholson  from Imperial College London said: "This fascinating study was primarily focused on trying to find optimised nutritional regimes to keep pet animals such as dogs healthy and as long-lived as possible. However these types of life-long studies can help us understand human diseases and ageing as well, and that is the added bonus of being able to do long-term non-invasive metabolic monitoring."

The researchers suggest that part of the healthier metabolic profiles of dogs on a restricted diet is related to their changed gut microbial activity, which in turn contributes to their generally improved health and longer lifespan. However, they also found that the overall effects of ageing on restricted and non-restricted animals exerted a greater effect on the metabolic profile than dietary restriction. This in itself is interesting as the lifelong metabolic trajectories of large animals had never been studied in this detail before and such information might be of relevance to ageing humans and their diseases. The team believes that one important outcome of this work will be the ability to improve the design of products' nutritional properties that mimic the health benefits of dietary restriction in pet dogs.


Story Source:

The above story is based on materials provided by Imperial College London. Note: Materials may be edited for content and length.


Cite This Page:

Imperial College London. "Dogs Lived 1.8 Years Longer On Low Calorie Diet: Gut Flora May Explain It." ScienceDaily. ScienceDaily, 20 April 2007. <www.sciencedaily.com/releases/2007/04/070419160140.htm>.
Imperial College London. (2007, April 20). Dogs Lived 1.8 Years Longer On Low Calorie Diet: Gut Flora May Explain It. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2007/04/070419160140.htm
Imperial College London. "Dogs Lived 1.8 Years Longer On Low Calorie Diet: Gut Flora May Explain It." ScienceDaily. www.sciencedaily.com/releases/2007/04/070419160140.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) — The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) — Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) — The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com
Feast Your Eyes: Lamb Chop Sent Into Space from UK

Feast Your Eyes: Lamb Chop Sent Into Space from UK

Reuters - Light News Video Online (Nov. 25, 2014) — Take a stab at this -- stunt video shows a lamb chop's journey from an east London restaurant over 30 kilometers into space. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins