Remedies for sex hormone dependent disease

1. A method for treating prostate cancer, which comprises administering an effective amount of an LHRH receptor agonist or antagonist or a salt thereof to a mammal in need thereof, and after a prostate cancer cell has become highly sensitive to androgen, administering an effective amount of an androgen receptor agonist or a salt thereof,

wherein the LHRH receptor agonist is a peptide of the formula:

(Pyr)Glu-R 1 -Trp-Ser-R 2 -R 3 -R 4 -Arg-Pro-R 5   (I)

wherein R 1 is His, Tyr, Trp or p-NH 2 -Phe; R 2 is Tyr or Phe; R 3 is Gly or a D type amino acid residue optionally having substituent(s); R 4 is Leu, Ile or Nle; and R 5 is Gly-NH—R 6 , wherein R 6 is a hydrogen atom or an alkyl group optionally having a hydroxyl group, NH—R 7 , wherein R 7 is a hydrogen atom, an amino group, an alkyl group optionally having a hydroxyl group, or —NH—CO—NH 2 ; wherein the D type amino acid residue for R 3 is a-D-amino acid having up to 9 carbon atoms, which is selected from the group consisting of D-Leu, Ile, Nle, Val, Nval, Abu, Phe, Phg, Ser, Thr, Met, Ala, Trp, and a-Aibu; the substituent for R 3 is selected from the group consisting of tert-butyl, tert-butoxy, tert-butoxycarbonyl, methyl, dimethyl, trimethyl, 2-naphthyl, indolyl-3-yl, 2-methylindolyl, and benzyl-imidazo-2-yl; and the alkyl group for R 6 or R 7 is a C 1-4 alkyl group selected from the group consisting of methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl and tert-butyl or a salt thereof;

the LHRH receptor antagonist is selected from the group consisting of abarelix, ganirelix, cetrorelix, 5-(N-benzyl-N-methylaminomethyl)-1-(2,6-difluorobenzyl)-6-[4-(3-methoxyureido)phenyl]-3-phenylthieno[2,3-d]pyrimidine-2,4(1H,3H)-dione, 5-(N-benzyl-N-methylaminomethyl)-1-(2,6-difluorobenzyl)-6-[4-(3-ethylureido)phenyl]-3-phenylthieno[2,3-d]pyrimidine-2,4(1H,3H)-dione, and 5-(N-benzyl-N-methylaminomethyl)-1-(2,6-difluorobenzyl)-6-[4-(3-ethylureido)phenyl]-3-phenylthieno[2,3-d]pyrimidine-2,4(1H,3H)-dione hydrochloride; and

the androgen receptor agonist is a steroidal androgen receptor agonist selected from the group consisting of dehydroepiandrosterone, testosterone, dihydrotestosterone, androstenedione, Mestanolone, Oxymesterone, Methandrostenolone, Fluoxymesterone, Chlorotestosterone acetate, Methenolone acetate, Oxymetholone, Stanozolol, Furazabol, Oxandrolone, 19-Nortestosterone, Norethandrolone, Ethylestrenol and Norbolethone, or a salt thereof.

2. A method for treating prostate cancer, which comprises 1) administering an androgen receptor agonist or a salt thereof to a highly androgen sensitive prostate cancer cell for a certain time period, 2) thereafter when the androgen sensitivity of the cancer cell has become lower, administering an effective amount of 1 or 2 compounds selected from an LHRH receptor agonist or antagonist and an antiandrogen drug, or a salt thereof, or when the androgen sensitivity of the cancer cell has increased, administering an effective amount of an androgen receptor agonist or a salt thereof, and 3) repeating the step 2) as necessary until disappearance or cure of the cancer, or reduction or maintenance of the volume of the cancer is achieved,

wherein the LHRH receptor agonist is a peptide of the formula:

(Pyr)Glu-R 1 -Trp-Ser-R 2 -R 3 -R 4 -Arg-Pro-R 5   (I)

wherein R 1 is His, Tyr, Trp or p-NH 2 -Phe; R 2 is Tyr or Phe; R 3 is Gly or a D type amino acid residue optionally having substituent(s); R 4 is Leu, Ile or Nle; and R 5 is Gly-NH—R 6 , wherein R 6 is a hydrogen atom or an alkyl group optionally having a hydroxyl group, NH—R 7 , wherein R 7 is a hydrogen atom, an amino group, an alkyl group optionally having a hydroxyl group, or —NH—CO—NH 2 ; wherein the D type amino acid residue for R 3 is a-D-amino acid having up to 9 carbon atoms, which is selected from the group consisting of D-Leu, Ile, Nle, Val, Nval, Abu, Phe, Phg, Ser, Thr, Met, Ala, Trp, and a-Aibu; the substituent for R 3 is selected from the group consisting of tert-butyl, tert-butoxy, tert-butoxycarbonyl, methyl, dimethyl, trimethyl, 2-naphthyl, indolyl-3-yl, 2-methylindolyl, and benzyl-imidazo-2-yl; and the alkyl group for R 6 or R 7 is a C 1-4 alkyl group selected from the group consisting of methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl and tert-butyl or a salt thereof;

the LHRH receptor antagonist is selected from the group consisting of abarelix, ganirelix, cetrorelix, 5-(N-benzyl-N-methylaminomethyl)-1-(2,6-difluorobenzyl)-6-[4-(3-methoxyureido)phenyl]-3-phenylthieno[2,3-d]pyrimidine-2,4(1H,3H)-dione, 5-(N-benzyl-N-methylaminomethyl)-1-(2,6-difluorobenzyl)-6-[4-(3-ethylureido)phenyl]-3-phenylthieno [2,3-d]pyrimidine-2,4(1H,3H)-dione, and 5-(N-benzyl-N-methylaminomethyl)-1-(2,6-difluorobenzyl)-6-[4-(3-ethylureido)phenyl]-3-phenylthieno[2,3-d]pyrimidine-2,4(1H,3H)-dione hydrochloride; and

the androgen receptor agonist is a steroidal androgen receptor agonist selected from the group consisting of dehydroepiandrosterone, testosterone, dihydrotestosterone, androstenedione, Mestanolone, Oxymesterone, Methandrostenolone, Fluoxymesterone, Chlorotestosterone acetate, Methenolone acetate, Oxymetholone, Stanozolol, Furazabol, Oxandrolone, 19-Nortestosterone, Norethandrolone, Ethylestrenol and Norbolethone, or a salt thereof.

3. The method of claim 2 , which comprises alternately administering an effective amount of 1) an androgen receptor agonist or a salt thereof and 2) 1 or 2 compounds selected from an LHRH receptor agonist or antagonist and an antiandrogen drug, or a salt thereof.

4. The method of claim 3 , comprising changing the administration drug after a lapse of 3 months to 5 years.

5. The method of claim 1 , wherein the LHRH receptor agonist is selected from the group consisting of Leuprorelin, Gonadrelin, Buserelin, Triptorelin, Goserelin, Nafarelin, Histrelin, Deslorelin, Meterelin and Lecirelin.

6. The method of claim 2 , wherein the LHRH receptor agonist is selected from the group consisting of Leuprorelin, Gonadrelin, Buserelin, Triptorelin, Goserelin, Nafarelin, Histrelin, Deslorelin, Meterelin and Lecirelin.