[Mechanism on androgen-independent progression of prostate cancer].

Eighty percent of prostate cancer with metastasis respond to androgen ablasion, showing initial androgen-sensitive growth. However, more than half of responders gradually loses dependency up to 5 years. Animal experiments reveal that loss of androgen sensitivity is attributable to complex reasons; adaptation, paracrine control by other androgen-independent tissues, genetic changes and mutation of androgen receptor. Most important event is explained from alteration of expression on oncogenes and suppressor genes. Counterplan of the progression was discussed.