Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Peptide containing doai
Reexamination Certificate
1999-10-15
2001-11-27
Saoud, Christine J. (Department: 1646)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Peptide containing doai
C514S002600, C530S313000, C530S328000, C530S332000, C530S333000, C530S335000, C930S021000, C930S130000
Reexamination Certificate
active
06323179
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to the field of regulating fertility and parturition. More particularly, it concerns the use of unique non-mammalian peptide hormone analogs of GnRH designed to be useful in fertility regulation, post-coital contraception and as a menses-inducing agent.
BACKGROUND OF THE INVENTION
Before the chemical characterization of the mammalian hypothalamic GnRH, it was realized that hypothalamic substances regulated production of pituitary LH and FSH. Burgus R., Guillemim R 1970 Hypothalamic releasing factors Ann Rev Biochem 39:499-526. Current contraceptive methods are centered on the existing knowledge of GnRH-gonadotropin-ovarian physiology.
The delineation of mammalian GnRH made possible the ability to create methods to detect and quantify this molecule. The human placenta and the chorionic membranes have also been observed to contain a GnRH-like substance. Gibbons J M, Mitnick M, Chieffo V 1975 In vitro biosynthesis, of TSH- and LH-releasing factors by the human placenta. Am J Obstet Gynecol 121:127-131. The present investigator has recently localized, quantified and demonstrated the synthesis of a GnRH-like substance by the human placenta. Siler-Khodr T M, Khodr G S 1978 Luteinizing hormone releasing factor content of the human placenta. Am J Obstet Gynecol 130:216-219; Khodr G S, Siler-Khodr T M 1978 Localization of luteinizing hormone releasing factor (LRF) in the human placenta. Fert Steril 29:523-526; Siler-Khodr T M, Khodr G S 1979 Extrahypothalamic luteinizing hormone releasing factor (LRF): Release of immunoreactive LRF by the human placenta in vitro. Fert Steril 22:294-296; Khodr G S, Siler-Khodr T M 1980 Placental LRF and its synthesis. Science 207:315-317.
The concentration of immunoreactive GnRH-like material in the placenta and maternal blood has been found to vary with gestational age, following a pattern similar to that of hCG Siler-Khodr T M, Khodr G S, Valenzuela G 1984 Immunoreactive gonadotropin-releasing hormone level in maternal circulation throughout pregnancy. Am J Obstet Gynecol 150:376-379; Sorein K A, Smilde C B, Spencer D K, Yoder B A, Grayson M A, Siler-Khodr T M 1996 Circulating maternal CRH and GnRH in normal and abnormal pregnancies. Am J Obstet Gynecol 175:912-916. It was also demonstrated that exogenous synthetic mammalian GnRH can stimulate hCG production from human placental explants in vitro, and that the GnRH stimulation of hCG release was a receptor mediated event, since it was specific and could be inhibited by a GnRH antagonist, [N-Ac-Pro, D-P-Cl-Phe, D-Nal(2)]-GnRH. Burgus R., Guillemim R 1970 Hypothalamic releasing factors Ann Rev Biochem 39:499-526; Baba Y, Matsui H, Schally A V 1971 Structure of the porcine LH- and FSH-releasing hormone II Confirmation of the proposed structure by conventional sequential analyses Biochem Biophys Res Commun 44:459-463; Gibbons J M, Mitnick M, Chieffo V 1975 In vitro biosynthesis, of TSH- and LH-releasing factors by the human placenta. Am J Obstet Gynecol 121:127-131; Siler-Khodr T M, Khodr G S 1979 Extrahypothalamic luteinizing hormone releasing factor (LRF): Release of immunoreactive LRF by the human placenta in vitro. Fert Steril 22:294-296; Siler-Khodr T M, Khodr G S, Vickery B H, Nestor J J, Jr. 1983 Inhibition of hCG, alpha hCG and progesterone release from human placental tissue in vitro by a GnRH antagonist. Life Sci 32:2741-2745, Khodr G S, Siler-Khodr T M 1979 the effect of luteinizing hormone releasing factor (LRF) on hCG secretion Fert Steril 30:301-304; Siler-Khodr T M, Khodr G S 1981 Dose response analysis of GnRH stimulation of hCG releases from human term placenta. Biol Reprod 25:353-358; Siler-Khodr T M, Khodr G S 1978 Luteinizing hormone releasing factor content of the human placenta. Am J Obstet Gynecol 130:216-21; Khodr G S, Siler-Khodr T M 1978 Localization of luteinizing hormone releasing factor (LRF) in the human placenta. Fert Steril 29:523-526. In addition to the inhibition of hCG, progesterone production was dramatically suppressed. The present investigator also observed that hCG response was related to the gestational age of the placenta. Siler-Khodr T M, Khodr G S, Valenzuela G, Rhode J 1986 Gonadotropin-releasing hormone effects on placental hormones during gestation: 1 Alpha-human chorionic gonadotropin, human chorionic gonadotropin and human_chorionic somatomammotropin. Biol Reprod 34:245-254. In addition, a gestational age-related action of the GnRH antagonist on the release of hCG and steroids was observed. Siler-Khodr T M, Khodr G S, Rhode J, Vickery B H, Nestor J J, Jr. 1987 Gestational age related inhibition of placental hCG, hCG and steroid hormone release in vitro by a GnRH antagonist. Placenta 8:1-14. Further studies demonstrated a potent action of GnRH on placental prostanoids, again resulting in their inhibition when endogenous chorionic GnRH was the highest. Siler-Khodr T M, Khodr G S, Valenzuela G, Harper J, Rhode J 1986 GnRH effects on placental hormones during gestation. 111 Prostaglandin E, prostaglandin F, and 13,14-dihydro-15-keto-prostaglandin F. Biol Reprod 35:312-319; Kang I S, Koong M Y, Forman J S, Siler-Khodr T M 1991 Dose-related action of GnRH on basal prostanoid production from the human term placenta. The 38
th
Annual Meeting of the Society for Gynecologic Investigation (San Antonio) Abstract #310:253 (Abstr.). The GnRH antagonist also inhibited basal prostaglandin production with greater potency than equimolar concentrations of GnRH, and this action was partially conserved by mammalian GnRH. Siler-Khodr T M, Khodr G S, Harper M J, Rhode J, Vickery B H, Nestor J J, Jr. 1986 Differential inhibition of human placental prostaglandin release in vitro by a GnRH antagonist. Prostaglandins 31:1003-1010. A chorionic GnRH was identified by the present investigator to regulate hCG in a paracrine fashion within the human placenta. Siler-Khodr T.M. and G. S. Khodr. 1981. The production and activity of placental releasing hormones. In Fetal Endocrinology. J. Resko and W. Montagna, editors. Academic Press Inc. New York. 183-210; Siler-Khodr, T. M. and G. S. Khodr. 1982 GnRH in the placenta. In role of Peptides and Proteins in Control of Reproduction. D. S. Khindsa and S. M. McCann, editors. Elsevier North Holland, New York. 347-363; Siler-Khodr T M 1983 Hypothalamic-like releasing hormones of the placenta. Clin Perinatol 10:533-566; Siler-Khodr T M 1983 Hypothalamic-like peptides of the placenta. Semin Reprod Endocrinol 1:321-333. These data demonstrated that this paracrine axis is of physiologic significance in cell to cell communication, and not of inconsequential, ectopic, tumor production.
Studies of other investigators have reported on the actions of mammalian GnRH on placental function. The chorionic GnRH axis has also been identified as having an observed feedback interaction for activin, inhibit, follistatin, neurotransmitter, prostaglandin and steriods, Shi L Y, Zhang Z W, Li W X 1994 Regulation of human chorionic gonadotropin secretion and messenger ribonucleic acid levels by follistatin in the NUCC-3 choriocarcinoma cell line. Endocrinology 134:2431-2437; Steele G L, Currie W D, Yuen B H, Jia X C, Perlas E, Luang P C 1993 Acute stimulation of human chorionic gonadotropin secretion by recombinant human activin-A in first trimester human trophoblast. Endocrinology 133:297-303; Li W, Olofsson J I, Jeung E B, Krisinger J, Yuen B H, Leung P C 1994 Gonadotropin-releasing hormone (GnRH) and cyclic AMP positively regulate inhibit subunit messenger RNA levels in human placental cells. Life Sci 55:1717-1724; Petraglia F, Vaughan J, Vale W 1991 Inhibin and activin modulate the release of gonadotropin-releasing hormone, human chorionic gonadotropin, and progesterone from cultured human placental cells. Proc Natl Acad Sci U S A 86:5114-5117; Petraglia F, Sawchenko P, Lim A T W, Rivier J, Vale W 1987 Localization, secretion, and action of inhibit in human placenta. Science 237:187-189; Shi C Z, Zhuang L Z 1993 Norepinephrine regulates human chorionic gonadotropin production by first trimes
Chernyshev Olga N.
Evans Michelle
Gunn, Lee & Keeling
Saoud Christine J.
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