Inhibin isolated from ovarian follicular fluid
First Claim
1. A composition of matter comprising purified inhibin of a purity sufficient to yield a single major band on non-reducing SDS-PAGE, wherein said purified inhibin suppresses production of follicle stimulating hormone without suppressing production of luteinizing hormone.
8 Assignments
0 Petitions
Accused Products
Abstract
A protein which satisfies all the biological criteria which are characteristic of inhibin has been isolated from a gonadal source. The purification and characterization of inhibin and the use of the purified material to raise antibodies, the use of inhibin and said antisera in a quantative radioimmunoassay, and applications in vitro and in vivo of inhibin and antibody to inhibin, are described.
There is provided a purified protein, inhibin, characterised in that
a. the apparent molecular weight as determined by SDS-PAGE is 56,000±1,000
b. the isoelectric point is in the range 6.9-7.3
c. the protein can bind specifically to Concanavalin A-Sepharose
d the protein consists of two sub-units, characterized in that
i. their apparent molecular weights as determined by SDS-PAGE are 44,000±3,000 and 14,000±2,000 respectively.
ii. the isoelectric point of the 44,000 molecular weight sub-unit is in the range 6.0-7.0
iii. the N-terminal amino acid sequences of the two sub-units are as described herein
e. the protein can suppress follicle stimulating hormone (FSH) but not luteinising hormone (LH), thyroid stimulating hormone or prolactin in an in vitro bioassay system
f. the protein can be labeled with radioactive iodine.
There is also provided a method for isolating and purifying inhibin from mammalian ovarian follicular fluid, characterised by
a. one or more gel permeation chromatography steps;
b. one or more reversed-phase high performance liquid chromatography steps;
c. one or more preparative polyacrylamide gel electrophoresis steps;
d. Electrophoretic elution of the purified inhibin.
-
Citations
132 Claims
- 1. A composition of matter comprising purified inhibin of a purity sufficient to yield a single major band on non-reducing SDS-PAGE, wherein said purified inhibin suppresses production of follicle stimulating hormone without suppressing production of luteinizing hormone.
-
2. A composition of matter comprising purified proteinaceous material comprising at least one subunit, said subunit having an apparent molecular weight of 14,000±
- 2,000, wherein said purified proteinaceous material is of a purity sufficient to yield a single major band on non-reducing SDS-PAGE, and wherein said purified proteinaceous material suppresses production of follicle stimulating hormone without suppressing production of luteinizing hormone.
-
3. A composition of matter comprising purified proteinaceous material of a purity sufficient to yield a single major band on non-reducing SDS-PAGE, wherein said purified proteinaceous material suppresses cellular content of follicle stimulating hormone without suppressing cellular content of luteinizing hormone.
-
4. A composition of matter comprising purified proteinaceous material of a purity sufficient to yield a single major band on non-reducing SDS-PAGE, wherein said purified proteinaceous material suppresses cellular content of follicle stimulating hormone in rate anterior pituitary cells in culture without suppressing cellular content of luteinizing hormone.
- 5. A composition of matter comprising purified proteinaceous material of at least 75% purity, wherein said purified proteinaceous material suppresses production of follicle stimulating hormone without suppressing production of luteinizing hormone.
-
34. A purified proteinaceous material having a purity sufficient to yield a single major band on non-reducing SDS-PAGE, wherein said purified proteinaceous material suppresses production of follicle stimulating hormone without suppressing production of luteinizing hormone, and which, when administered as an antigen in mammals, raises antibodies that neutralize the follicle stimulating hormone suppressing activity of said purified proteinaceous material.
- 35. A composition of matter comprising a purified inhibin of a purity sufficient to yield a single major band on non-reducing SDS-PAGE having an apparent molecular weight of between about 54,000 and 57,000, said purified inhibin being capable of suppressing production of follicle stimulating hormone by rat anterior pituitary cells in culture without inhibiting the production of luteinizing hormone by said cells.
-
49. A method for purifying inhibin from a starting material containing inhibin comprising:
-
a) subjecting said starting material to a first gel permeation chromatography to yield a first eluent; b) subjecting said first eluent to a second gel permeation chromatography to yield a second eluent; c) subjecting said second eluent to reverse phase high performance liquid chromatography to yield a third eluent; and d) subjecting said third eluent to preparative polyacrylamide gel electrophoresis. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 125, 126, 127, 128, 129, 130, 131)
-
Specification