Featured Research

from universities, journals, and other organizations

Estimating The Risk Of Cancer

Date:
December 23, 2003
Source:
Netherlands Organization For Scientific Research
Summary:
Dutch scientists have developed a new tumour growth model in which the tumour is a part of the host's body. The model reveals that a low-calorie diet delays the growth of a tumour, and thus increases the life expectancy.

Dutch scientists have developed a new tumour growth model in which the tumour is a part of the host's body. The model reveals that a low-calorie diet delays the growth of a tumour, and thus increases the life expectancy. Furthermore, tumours were found to develop faster in younger than in older hosts.

Ingeborg van Leeuwen has developed a new tumour growth model. The model views the tumour as an integral part of the body. Existing models regard the tumour as an independent unit, separate from the host in which it grows. The tumour growth rate was found to be dependent on the age-dependent metabolic rate of the host. The model also established the relationship between the tumour growth process and the host's food intake.

Animals which follow a low-calorie diet have a higher life expectancy upon developing a tumour than animals without any dietary restrictions. The researcher also predicts that tumours generally develop faster in younger than in older hosts. This is because the energy available per cell decreases with age.

Van Leeuwen also developed a model that established the effect of food intake on growth and ageing. The model consists of two modules. The first describes the energy dynamics of an organism and provides equations for the feeding rate, fat content, change in body weight and metabolic rate. The second module describes the ageing of an organism. This description is based on the theory that ageing is the result of oxidative damage caused by free radicals. The two modules are linked together by the fact that the rate of production of free radicals depends on the metabolic rate, which in turn depends on the energy uptake and body size. In the end, a combination of the two modules results in an equation in which the life expectancy depends on the food consumption and body growth.

For fully-grown animals, the model simplifies to another, already well-known model. This enabled the researcher to ascertain how the parameters of this known model depend on the metabolic rate, feeding behaviour, and body size of the animals.

The research was funded by the Technology Foundation STW.


Story Source:

The above story is based on materials provided by Netherlands Organization For Scientific Research. Note: Materials may be edited for content and length.


Cite This Page:

Netherlands Organization For Scientific Research. "Estimating The Risk Of Cancer." ScienceDaily. ScienceDaily, 23 December 2003. <www.sciencedaily.com/releases/2003/12/031223064152.htm>.
Netherlands Organization For Scientific Research. (2003, December 23). Estimating The Risk Of Cancer. ScienceDaily. Retrieved April 17, 2014 from www.sciencedaily.com/releases/2003/12/031223064152.htm
Netherlands Organization For Scientific Research. "Estimating The Risk Of Cancer." ScienceDaily. www.sciencedaily.com/releases/2003/12/031223064152.htm (accessed April 17, 2014).

Share This



More Health & Medicine News

Thursday, April 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Could Even Casual Marijuana Use Alter Your Brain?

Could Even Casual Marijuana Use Alter Your Brain?

Newsy (Apr. 16, 2014) A new study conducted by researchers at Northwestern and Harvard suggests even casual marijuana use can alter your brain. Video provided by Newsy
Powered by NewsLook.com
Thousands Of Vials Of SARS Virus Go Missing

Thousands Of Vials Of SARS Virus Go Missing

Newsy (Apr. 16, 2014) A research institute in Paris somehow misplaced more than 2,000 vials of the deadly SARS virus. Video provided by Newsy
Powered by NewsLook.com
Formerly Conjoined Twins Released From Dallas Hospital

Formerly Conjoined Twins Released From Dallas Hospital

Newsy (Apr. 16, 2014) Conjoined twins Emmett and Owen Ezell were separated by doctors in August. Now, nearly nine months later, they're being released from the hospital. Video provided by Newsy
Powered by NewsLook.com
Ebola Outbreak Now Linked To 121 Deaths

Ebola Outbreak Now Linked To 121 Deaths

Newsy (Apr. 15, 2014) The ebola virus outbreak in West Africa is now linked to 121 deaths. Health officials fear the virus will continue to spread in urban areas. Video provided by Newsy
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:
from the past week

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