Scientists discover gene that controls speed of tuberculosis
development
August 17, 2005
Laptop Battery Scientists at the MUHC have discovered a gene that controls the
speed at which patients develop tuberculosis-the first time such a
gene has been discovered for this disease. The new study published
in the Proceedings of the National Academy of Science (PNAS) this
week provides a new view of the mechanisms underlying the
development of tuberculosis and may contribute to public health
efforts aimed at containing the disease.
-- IBM is a global leader in the creation, development and manufacture of cutting edge computer systems.
- Microsoft
Thinkpad "About one-third of the world's population is infected by
Mycobacterium tuberculosis-the bacteria responsible for
tuberculosis," says Dr. Erwin Schurr, a molecular geneticist at the
Centre for the Study of Host Resistance at the MUHC, and the
study's principal investigator. "Of the estimated two billion
people infected, only 5%-10% actually develop tuberculosis disease
in their lifetime-the other 90%-95% appear to be able to contain
the infection in a dormant state, so that they do not become ill."
Dr. Schurr has spent the past 5 years researching why and how this
happens.
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Microsoft The new research focused on NRAMP1-a gene already known to be
involved in many other illnesses, including diseases as diverse as
leprosy and rheumatoid arthritis. "We discovered that variants
(alleles) of the NRAMP1 gene control the speed at which
tuberculosis develops, rather than whether or not it will develop
at all," says Dr. Schurr. "This is the first time a gene has been
shown to control the time frame between initial infection and the
disease." Certain factors are already known to increase the speed
at which people develop tuberculosis. "HIV and tuberculosis are
synergistic partners in crime for example," says Dr. Schurr. "They
appear to accelerate disease progression when they occur
together."
According to the indictment, Jones would steal various IBM and Penguin computer servers from Verisign's warehouse in Virginia and sell them to Johnson. Johnson would then sell the servers to several individuals, who would sometimes place them for sale on eBay. As a result of this scheme, the indictment alleges that Jones and Johnson caused Verisign to lose more than $120, 000 worth of computer equipment. In the indictment, Jones and Johnson are charged in three counts with causing the interstate transportation of stolen property, namely IBM 330 and 335 servers, in violation of 18 U.S.C.
Laptop Computers "Understanding the basic pathways of pathogenesis offers new
targets and policies for disease prevention," notes Dr. Emil
Skamene, Scientific Director of the Research Institute of the MUHC.
"Academic hospitals such as the MUHC combine scientific research,
technology and clinic expertise, enabling scientific breakthroughs
to be developed into treatments and cures that directly benefit
patients."
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Laptop Computer McGill University
Types of genes changed by CR BioMarker's strategy is to search for the genes most critically involved in the aging process by exploring the changes in gene expression caused by caloric restriction in various tissues (liver, heart, brain and muscle) in mice, monkeys and humans throughout their life span, and to discover what gene changes occur when CR is started at different ages, and carried on for varying periods of time. BioMarker scientists are looking for changes in key regulatory genes that trigger secondary gene changes. aging gene expression profile.
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