Washington: Will a gene bring healthful blessings or the curse of disease? It may depend on whether it is inherited from mom or dad, researchers reported on Wednesday.
They found a gene that slightly raised the risk of breast cancer when inherited from the father but had no effect, or perhaps was slightly protective, when inherited from the mother.A gene associated with a slow-growing form of skin cancer called basal-cell carcinoma was far more dangerous when inherited from the father.The researchers were struck the most by the newly discovered type-2 diabetes gene, a so-called single nucleotide polymorphism or SNP -- a single-letter change in the genetic code."The impact of the type-2 diabetes variant is not only large, but unusual: if an individual inherits it from their father, the variant increases risk of diabetes by more than 30 percent compared to those who inherit the non diabetes-linked version,` the researchers wrote."If inherited maternally, the variant lowers risk by more than 10 percent," they added."Nearly one quarter of those studied have the highest risk combination of the versions of this SNP, putting them at a roughly 50 percent greater lifetime risk of diabetes than the quarter with the protective combination."
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