US 5,183,815 A · Bone acting agents

Abstract

Described are new agents for treating bone disorders associated with a reduction in bone mass and abnormalities in bone resportion or bone formation including osteoporosis. Paget's disease, bone metastases and malignant hypercalcemia. The agents are hydroxyl containing steroidal hormones, having bone resportion antagonist or bone formation stimulatory activity, covalently linked through the hydroxyl group via a bond hydrolyzable in the human body, e.g. carbamate or carbonate, which is further covalently linked to an amino, or hydroxy substituted alkylidene-1,1-bisphosphonate, through the respective amino or hydroxy group. The alkyl bisphosphonate moiety confers bone affinity. The agent acts by delivering the steroidal hormone directly to the bone target site where it is released for bone resorption antagonist or bone formation stimulatory action by hydrolysis of the hydrolyzable covalent bond.

Claims15

Dependent claims

A compound of the formula:

A-B-C
wherein:
A is a residue of a hydroxyl containing steroidal hormone possessing human bone resorption antagonist activity or bone formation stimulatory activity;
C is a residue of an amino or hydroxy alkyl-1,1-bisphosphonate, possessing human bone affinity;
and
B is a covalent linkage selected from the group consisting of carbamate, carbonate, thiocarbamate, and thiocarbonate, connecting A through the hydroxyl moiety to C through the respective amino or hydroxyl moiety, which linkage can hydrolyze in the human body in the vicinity of bone to release steroidal hormone A, and pharmaceutically acceptable salts or esters thereof.

3 more elements

Dependencies are inferred from the claim text.

Bone acting agents

Life of this patent

Bone acting agents

Life of this patent

Abstract

Claims15