G-proteins and hormonal signalling in human pituitary tumors: genetic mutations and functional alterations.

Abstract excerpt

In the last few years, molecular studies on pituitary adenomas have yielded several lines of evidence supporting a primary pituitary origin for these tumors. In fact, analyses of x-chromosomal inactivation show that the great majority of pituitary tumors are monoclonal in origin, suggesting that one or more mutations are responsible for the selective expansion of a single cell clone. Mutations constitutively...

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