Are serum levels of cathepsin D , sirtuin1 , and endothelial nitric oxide synthase correlatively reduced in elderly healthy people?
This study shows lower serum CTSD values in elderly subjects than in younger subjects. This is the first to demonstrate age-related changes in cathepsin D levels in humans and the association between SIRT1 and eNOS.
The DTH skin test response, a functional measure of cellular immunity, is an independent predictor of progression to AIDS in persons with HIV.