The IGF-1 receptor regulates lifespan and resistance to oxidative stress in mice. Researchers inactivated the IGF-1 receptor gene in mice, creating heterozygous knockout mice (IGF-1R +/-) that had half the normal number of receptors. These mice lived 26% longer than their wild-type littermates, with females living 33% longer. They did not develop dwarfism, had normal energy metabolism, and were resistant to oxidative stress. The study suggests that the IGF-1 receptor may be a key regulator of mammalian lifespan. The findings indicate that IGF-1R insufficiency does not delay sexual maturation and that the extension of lifespan in IGF-1R +/- mice is sex-dependent. The mice also showed increased resistance to oxidative stress, with female mutants showing greater resistance than males. The study also found that IGF-1R +/- mice had normal food intake, physical activity, and metabolic rate, suggesting that their longevity may be due to reduced IGF-I levels, similar to caloric restriction. The results indicate that the IGF-1 receptor plays a role in regulating lifespan and resistance to oxidative stress in mice. The study provides evidence that the IGF-1 receptor is involved in the regulation of carbohydrate metabolism and in the pancreatic control of glucose homeostasis. The findings suggest that the IGF-1 receptor may be a key regulator of mammalian and possibly human lifespan. The study also highlights the importance of understanding the mechanisms of lifespan regulation in mammals, as well as the potential for developing interventions to extend lifespan. The results indicate that the IGF-1 receptor is involved in the regulation of energy metabolism and that its insufficiency may contribute to increased lifespan. The study also shows that the IGF-1 receptor is involved in the regulation of oxidative stress resistance, which is a major determinant of aging. The findings suggest that the IGF-1 receptor may be a key regulator of mammalian lifespan and that its insufficiency may contribute to increased longevity. The study provides evidence that the IGF-1 receptor is involved in the regulation of energy metabolism and that its insufficiency may contribute to increased lifespan. The results indicate that the IGF-1 receptor is involved in the regulation of oxidative stress resistance, which is a major determinant of aging. The study also highlights the importance of understanding the mechanisms of lifespan regulation in mammals, as well as the potential for developing interventions to extend lifespan. The findings suggest that the IGF-1 receptor may be a key regulator of mammalian and possibly human lifespan. The study provides evidence that the IGF-1 receptor is involved in the regulation of energy metabolism and that its insufficiency may contribute to increased lifespan. The results indicate that the IGF-1 receptor is involved in the regulation of oxidative stress resistance, which is a major determinant of aging. The study also highlights the importance of understanding the mechanisms of lifespan regulation inThe IGF-1 receptor regulates lifespan and resistance to oxidative stress in mice. Researchers inactivated the IGF-1 receptor gene in mice, creating heterozygous knockout mice (IGF-1R +/-) that had half the normal number of receptors. These mice lived 26% longer than their wild-type littermates, with females living 33% longer. They did not develop dwarfism, had normal energy metabolism, and were resistant to oxidative stress. The study suggests that the IGF-1 receptor may be a key regulator of mammalian lifespan. The findings indicate that IGF-1R insufficiency does not delay sexual maturation and that the extension of lifespan in IGF-1R +/- mice is sex-dependent. The mice also showed increased resistance to oxidative stress, with female mutants showing greater resistance than males. The study also found that IGF-1R +/- mice had normal food intake, physical activity, and metabolic rate, suggesting that their longevity may be due to reduced IGF-I levels, similar to caloric restriction. The results indicate that the IGF-1 receptor plays a role in regulating lifespan and resistance to oxidative stress in mice. The study provides evidence that the IGF-1 receptor is involved in the regulation of carbohydrate metabolism and in the pancreatic control of glucose homeostasis. The findings suggest that the IGF-1 receptor may be a key regulator of mammalian and possibly human lifespan. The study also highlights the importance of understanding the mechanisms of lifespan regulation in mammals, as well as the potential for developing interventions to extend lifespan. The results indicate that the IGF-1 receptor is involved in the regulation of energy metabolism and that its insufficiency may contribute to increased lifespan. The study also shows that the IGF-1 receptor is involved in the regulation of oxidative stress resistance, which is a major determinant of aging. The findings suggest that the IGF-1 receptor may be a key regulator of mammalian lifespan and that its insufficiency may contribute to increased longevity. The study provides evidence that the IGF-1 receptor is involved in the regulation of energy metabolism and that its insufficiency may contribute to increased lifespan. The results indicate that the IGF-1 receptor is involved in the regulation of oxidative stress resistance, which is a major determinant of aging. The study also highlights the importance of understanding the mechanisms of lifespan regulation in mammals, as well as the potential for developing interventions to extend lifespan. The findings suggest that the IGF-1 receptor may be a key regulator of mammalian and possibly human lifespan. The study provides evidence that the IGF-1 receptor is involved in the regulation of energy metabolism and that its insufficiency may contribute to increased lifespan. The results indicate that the IGF-1 receptor is involved in the regulation of oxidative stress resistance, which is a major determinant of aging. The study also highlights the importance of understanding the mechanisms of lifespan regulation in