Formulations for extending lifespan and healthspan
A technology for vitamins and compounds, applied in the field of preparations for prolonging life and health, which can solve problems such as high burden of long-term side effects
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Embodiment 1
[0277] Example 1. Screening of GRAS Compounds for Lifespan Extension in the Caenorhabditis elegans Lifespan Assay
[0278] Nematode strains and growth
[0279] Grow nematode strains under standard laboratory conditions. The nematode strains used in this study included N2, CF1038[daf-16(mu86)I], TJ1052[age-l(hx546)II], PS3551[hsf-l(sy44l)I], and TJ356[zis356 IV[daf -16::daf-16-gfp; pRF4(rol-6(sul006))]. The wild-type N2 and age-1 strains were used as negative and positive controls, respectively, while the daf-16 / hsf-1 strain was used in epistasis experiments to explore pathway involvement of lifespan-extending compounds. To explore the involvement of mTOR in compound activity without effects on development, RNAi treatment with TOR-associated genes was used (see, e.g., Sobida-Stubbs, S. et al. TOR signaling and rapamycin influence longevity by regulating SKN-1 / Nrf and DAF- 16 / FoxO. Cell Metab. 15, 713-724 (2012)).
[0280] Epistasis experiments to assess pathway involvem...
Embodiment 2
[0292] Example 2. Testing of GRAS compounds in a debilitated mouse model
[0293] animal
[0294] C57BL / 6J mice of both sexes were aged in groups in cages in an approved animal facility. Mice were maintained on a 12-h light / dark cycle with free access to food and water. Typically, interventions are initiated after mice reach 12 months of age and continue throughout the life of the mice. However, short-term or periodic intervention strategies could also be tested.
[0295] Intervention and Evaluation
[0296] Mice are randomly assigned to treatment or control groups and administered a combination of active agents or a placebo (control) in food for a sufficient duration of treatment to observe its effect on frailty characteristics.
[0297] Mice were evaluated periodically according to the 31-item clinical frailty index previously described herein. It was first reported by Whitehead et al. (Journals of Gerontology: BIOLOGICAL SCIENCES, 69:621-632; 2014). More recently,...
Embodiment 3
[0314] Example 3. Cell Senescence Test
[0315] To measure the effect of Ca-AKG on cellular senescence, IMR-90 fibroblasts in culture were gamma-irradiated after pretreatment with AKG or before Ca-AKG (post) treatment. Cellular senescence was measured by β-galactosidase fluorescence. Pretreatment of Ca-AKG protected cells from radiation-induced senescence, suggesting that one mechanism by which Ca-AKG mediates lifespan extension and frailty reduction may be by preventing cellular senescence.
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