Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Cyclopentanohydrophenanthrene ring system doai
Reexamination Certificate
2000-04-19
2002-07-23
Moezie, Minna (Department: 1617)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Cyclopentanohydrophenanthrene ring system doai
C514S224200, C514S230500, C514S255060, C514S390000
Reexamination Certificate
active
06423699
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to regimens of administering compounds which are antagonists of the progesterone receptor.
BACKGROUND OF THE INVENTION
Intracellular receptors (IR) form a class of structurally related gene regulators known as “ligand dependent transcription factors” (R. M. Evans,
Science
, 240, 889, 1988). The steroid receptor family is a subset of the IR family, including progesterone receptor (PR), estrogen receptor (ER), androgen receptor (AR), glucocorticoid receptor (GR), and mineralocorticoid receptor (MR).
The natural hormone, or ligand, for the PR is the steroid progesterone, but synthetic compounds, such as medroxyprogesterone acetate or levonorgestrel, have been made which also serve as ligands. Once a ligand is present in the fluid surrounding a cell, it passes through the membrane via passive diffusion, and binds to the IR to create a receptor/ligand complex. This complex binds to specific gene promoters present in the cell's DNA. Once bound to the DNA the complex modulates the production of mRNA and protein encoded by that gene.
A compound that binds to an IR and mimics the action of the natural hormone is termed an agonist, whilst a compound which inhibits the effect of the hormone is an antagonist.
PR agonists (natural and synthetic) are known to play an important role in the health of women. PR agonists are used in birth control formulations, typically in the presence of an ER agonist. ER agonists are used to treat the symptoms of menopause, but have been associated with a proliferative effect on the uterus which can lead to an increased risk of uterine cancers. Co-administration of a PR agonist reduces/ablates that risk.
PR antagonists may also be used in contraception. In this context they may be administered alone (Ulmann, et al,
Ann. N Y Acad Sci
., 261, 248, 1995), in combination with a PR agonist (Kekkonen, et al,
Fertility and Sterility
, 60, 610, 1993) or in combination with a partial ER antagonist such as tamoxifen (WO 96/19997 A1 Jul. 4, 1996). PR antagonists may also be useful for the treatment of hormone dependent breast cancers (Horwitz, et al, Horm. Cancer, 283, pub: Birkhaeuser, Boston, Mass., ed. Vedeckis) as well as uterine and ovarian cancers. PR antagonists may also be useful for the treatment of non-malignant chronic conditions such as fibroids (Murphy, et al,
J. Clin. Endo. Metab
., 76, 513, 1993) and endometriosis (Kettel, et al,
Fertility and Sterility
, 56, 402, 1991). PR antagonists may also be useful in hormone replacement therapy for post menopausal patients in combination with a partial ER antagonist such as tamoxifen (U.S. Pat. No. 5,719,136). PR antagonists, such as mifepristone and onapristone, have been shown to be effective in a model of hormone dependent prostate cancer, which may indicate their utility in the treatment of this condition in men (Michna, et al,
Ann. N.Y. Acad. Sci
., 761, 224, 1995).
Jones, et al, (U.S. Pat. No. 5,688,810) disclose the PR antagonist dihydroquinoline 1.
Jones, et al, described the enol ether 2 (U.S. Pat. No. 5,693,646) as a PR ligand.
Jones, et al, described compound 3 (U.S. Pat. No. 5,696,127) as a PR ligand.
Zhi, et al, described lactones 4, 5 and 6 as PR antagonists (J. Med. Chem, 41, 291, 1998).
Combs, et al., disclosed the amide 8 as a ligand for the PR (
J. Med. Chem
., 38, 4880, 1995).
Periman, et al., described the vitamin D analog 9 as a PR ligand (
Tet Letters
, 35, 2295, 1994).
Hamann, et al, described the PR antagonist 10 (
Ann. N.Y. Acad. Sci
., 761, 383, 1995).
Chen, et al, described the PR antagonist 11 (Chen, et al, POI-37, 16
th
Int. Cong. Het. Chem, Montana, 1997).
Kurihari, et. al., described the PR ligand
12
(
J. Antibiotics
, 50, 360, 1997).
Among the examples of the prior art, Ueda et al. (EP 22317) claimed benzothiazoline and benzoxazoline compounds of formula A as the inhibitors of aldose reductase. The benzimidazolinone derivatives such as compound B were disclosed by Hara et al. (EP 454330) and claimed as lung surfactant secretion promoters. In their preparation of benzimidazole and analogues as antiulcer and cardiovascular agents, Bru-Magniez et al. (EP 385850) synthesized the benzoimidazolinones such as compound C. Used as cAMP PDE III inhibitors, benzoimidazolinones, benzoxazolinones, and benzothiazolinones as shown in formula D were reported by Singh et al (
J. Med. Chem
., 37, 248-254 (1994).
Related to quinoxalin-2-ones, European patent (Ganzer et al. EP 311135) discloses the compounds such as E as herbicides.
U.S. Pat. No. 5,521,166 (Grubb) teaches cyclophasic hormonal regimens comprising an antiprogestin and a progestin wherein the progestin is administered in the alternating presence and absence of an antiprogestin. The disclosed regimens also provide for use of an estrogen for a period of from 2-4 days to prevent breakthrough bleeding.
DESCRIPTION OF THE INVENTION
This invention provides combination therapies and dosing regimens utilizing antiprogestational agents in combination with one or more progestational agents. This invention further provides methods of treatment and dosing regimens further utilizing in combination with these antiprogestins and progestins, an estrogen, such as ethinyl estradiol.
These regimens and combinations may be administered to a mammal to induce contraception or for the treatment and/or prevention of secondary amenorrhea, dysfunctional bleeding, uterine leiomyomata, endometriosis; polycystic ovary syndrome, carcinomas and adenocarcinomas of the endometrium, ovary, breast, colon, prostate. Additional uses of the invention include stimulation of food intake. The uses herein for the treatment and/or prevention of the conditions or diseases described above includes the continuous administration or periodic discontinuation of administration of the invention to allow for minimization of effect dose or minimization of side effects or cyclic menstrual bleeding.
The use of this invention for contraception includes administration, preferably orally, to a female of child bearing age an antiprogestin in combination with an estrogen or progestin or both. These administration regimens are preferably carried out over 28 consecutive days, with a terminal portion of the cycle containing administration of no progestins, estrogens or anti-progestins.
The progestins of these combinations may be administered alone or in combination with an estrogen for the first 14 to 24 days of the cycle, the progestins being administered at a dosage range equal in progestational activity to about 35 &mgr;g to about 150 &mgr;g levonorgestrel per day, preferably equal in activity to from about 35 &mgr;g to about 100 &mgr;g levonorgestrel per day. An antiprogestin may then be administered alone or in combination with an estrogen for a period of 1 to 11 days to begin on any cycle day between day 14 and 24. The anti-progestin in these combinations may be administered at a dose of from about 2 &mgr;g to about 50 &mgr;g per day and the estrogen may be administered at a dose of from about 10 &mgr;g to about 35 &mgr;g per day. In an oral administration, a package or kit containing 28 tablets will include a placebo tablet on those days when the antiprogestin or progestin or estrogen is not administered.
In a preferred embodiment of this invention, the progestins of this invention may be administered alone or in combination with estrogen for the initial 18 to 21 days of a 28-day cycle, followed by administration of an antiprogestin, alone or in combination with an estrogen, for from 1 to 7 days.
The estrogen to be used in the combinations and formulations of this invention is preferably ethinyl estradiol.
Progestational agents useful with this invention include, but are not limited to, levonorgestrel, norgestrel, desogestrel, 3-ketodesogestrel, norethindrone, gestodene, norethindrone acetate, norgestimate, osaterone, cyproterone acetate, trimegestone, dienogest, drospirenone, nomegestrol, or (17-deacetyl)norgestimate. Among the preferred progestins for use in the combinations of this invention are levonorgestrel, gestodene
Bender Reinhold R. W.
Edwards James P.
Grubb Gary S.
Jones Todd K.
Tegley Christopher M.
American Home Products Corporation
Howson and Howson
Hui San Ming
Moezie Minna
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