The nuclear matrix of the prostate contains acceptor sites for androgen receptors.
In cell-free binding experiments, androgen receptors of rat ventral prostate cytosol bound with high affinity (Kd = 10(-10) M) to a saturable number of sites (acceptors) associated with the nuclear matrix of the prostate. This binding was dependent on the presence of an activated androgen-receptor complex. In addition, the binding was tissue-specific, since liver nuclear matrix, in contrast, contained only 15-20% as many acceptors for androgen receptors as the prostate nuclear matrix. The prostate nuclear matrix contained approximately 75% of the number of total nuclear acceptor sites. Matrix-associated acceptor sites appear to be associated with the internal RNA-protein network of the nuclear matrix since the peripheral lamina component of the matrix bound only 30% as many receptors as the intact nuclear matrix.
D000818:Animals; D002467:Cell Nucleus / Q000032:analysis; D004963:Estrenes / Q000378:metabolism; D008099:Liver / Q000032:analysis; D008297:Male; D015741:Metribolone; D011467:Prostate / Q000648:ultrastructure*; D051381:Rats; D011919:Rats, Inbred Strains; D011944:Receptors, Androgen / Q000032:analysis* / Q000378:metabolism; D011987:Receptors, Steroid / Q000032:analysis*
D004963:Estrenes; D011944:Receptors, Androgen; D011987:Receptors, Steroid; D015741:Metribolone