Abstract
This study observed the expression of transforming growth factor-alpha (TGF-alpha) and tumor necrosis factor-alpha (TNF-alpha) in pheochromocytoma (PHEO) tissue and examined their effects on the proliferation and apoptosis of human PHEO cells. The mRNA and protein expressions of TGF-alpha and TNF-alpha were higher in PHEO tissues than in normal adrenal medullary tissues, and their expressions varied with pathological features. TGF-alpha and TNF-alpha stimulated the proliferation of primary human PHEO cells, but had no effect on the cell apoptosis. Both TGF-alpha and TNF-alpha might be involved in the pathogenesis of human PHEO. TNF-alpha needs to be further investigated before its treatment of PHEO can be realized in clinical practice.
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