Rejuvenescimento de células-tronco gera músculos maiores em camundongos idosos

Pesquisadores demonstraram que o rejuvenescimento de células-tronco musculares de camundongos velhos leva a um maior crescimento muscular e a uma recuperação aprimorada após lesões. A abordagem poderá, um dia, ajudar pessoas idosas a recuperar força e mobilidade. Os experimentos demonstraram benefícios claros na função das pernas e na reparação de tecidos.

Cientistas da Duke University extraíram células-tronco musculares de camundongos idosos, suplementaram-nas com lipídios específicos em laboratório e, em seguida, injetaram as células tratadas nos músculos lesionados de outros camundongos velhos. As células tratadas produziram novas fibras musculares 45 por cento maiores do que as provenientes de células não tratadas, e os camundongos apresentaram melhor desempenho em testes de esteira e de mobilidade em poucos dias.

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