RevGenetics Blog
Posts Tagged ‘telomere’
Telomerase and Type 2 Diabetes
25January2011
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Another interesting November research article recently published deals with the shortening of telomeres as the missing link between aging and type 2 diabetes (AGING, 2010, Vol 2 no 10:650). As stated before telomere shortening, either because there is no telomerase activity or by some other mechanism, have been documented to be associated to diseases of aging. In the present study a group of scientist led by Michael Ristow used mice to establish a link between diabetes and telomere shortening. In their study, the group utilized mice that had their telomerase enzyme modified in such a way that it was inactivated. This resulted in telomere shortening and reduced replicative capacity of beta-cells (the pancreatic cells that produce insulin). The lack of insulin secretion and the increase of glucose intolerance can therefore be viewed as an aging-associated disorder and method of increasing telomerase activity could result in improvements in this disease.
Telomerase and Age-related Macular Degeneration.
25January2011
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Injury to our retinal pigment epithelium by oxidative damage during old age can lead to Age-related Macular Degeneration (AMD). AMD is not something to be taken lightly given the fact that prevalence is 30% in people between the ages of 75 and 85. Melatonin, which is an antioxidant protein, was studied for it’s potential to reduce oxidative damage more so than other antioxidants due to the fact that retinal pigment epithelium cells have a receptor for melatonin, which would help this compound bind it target cell (Med Hypotheses 2010 Sep 28). The results from the author indicated that in merely three months melatonin treatment of 3 mg given orally daily was sufficient to reduce the AMD. The author hypothesized that the mechanism of action is ultimately provided by melatonin’s ability to activate telomerase activity retinal pigment epithelium. This activation helps not only prevent the onset of AMD but also treat it.
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