Friday, February 03, 2012

Aging-Caloric Restriction and BDNF-Leptin

As we age, selective BDNF receptors increase in the the dorsal vagal complex (DVC), the brainstem center mediating the satiety reflex. Aging also affects the suppressor of cytokine signaling-3. This results in abnormal responses to BDNF and Leptin Signaling.

In this study, the investigators found that by restricting calories in rats, DVC BDNF immunoreactive concentrations were elevated and resulting in satiety threshold stability.  This indicates functional desensitization of the DVC to these signals: Karine Bédard, Stéphanie Segura, Stéphanie Mahaut, Catherine Tardivel, Guylaine Ferland, Bruno Lebrun, Pierrette Gaudreau. Effects of aging and caloric restriction on brainstem satiety center signals in rats. Mechanisms of Ageing and Development.

The authors used our BDNF Antibody to determine expression in the DVC.....goat serum and 0.3% Triton-X-100) (Sigma–Aldrich), overnight at 4 °C with chicken anti-rat BDNF antibody (Neuromics, Edina, MN; diluted 1/200 in blocking buffer), rinsed 3× 10 min in fresh PBS and incubated for 2 h, in the dark...

These findings could lead to potential therapies based on modulating BDNF expression in the DVC.

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