Osteoporosis Clinical Trial
Official title:
A Study to Evaluate the Effects of Calcium Supplementation on the Efficacy and Safety of Recombinant Human Parathyroid Hormone (ALX1-11) in Postmenopausal Women With Osteoporosis (CAP Study)
This study is evaluating the effects of calcium supplementation on the efficacy and safety of recombinant parathyroid hormone (ALX1-11) in postmenopausal women with osteoporosis. The primary objective of this clinical study is to evaluate whether increases in bone mineral density (BMD) for subjects treated with ALX1-11 and receiving no calcium supplementation are less than increases in BMD observed for subjects treated with ALX1-11 and receiving calcium supplementation.
Effects of ALX1-11 on bone mineral density (BMD) have been documented in a dose-finding Phase II clinical trial in osteoporotic postmenopausal women, supplemented with calcium and Vitamin D3 but without any other treatment for osteoporosis. The anabolic effects of ALX1-11 in the lumbar vertebrae were statistically significant after the 12-month treatment period and more pronounced than any approved therapy. Additionally, animal studies have shown that the new bone formed by treatment with ALX1 11 is of good quality both histologically and biomechanically. The primary objective of this clinical study is to evaluate whether increases in bone mineral density (BMD) for subjects treated with ALX1-11 and receiving no calcium supplementation are less than increases in BMD observed for subjects treated with ALX1-11 and receiving calcium supplementation. A secondary objective of this clinical study are to evaluate whether changes in other efficacy parameters, such as bone mineral content (BMC) and biochemical markers of bone turnover, for subjects treated with ALX1-11 and receiving no calcium supplementation are less than increases observed for subjects treated with ALX1-11 and receiving calcium supplementation. This is a double-blind, multi-centered, randomized, placebo-controlled, parallel-group study comprised of 3 treatment groups: ALX1-11 injection plus oral calcium, ALX1-11 injection plus oral placebo calcium, and placebo ALX1-11 injection plus oral calcium. All subjects also receive 400 IU oral vitamin D3. The dose of ALX1-11 to be used in this study is 100 μg, self administered by daily sc injection. The calcium dose is 700 mg/day. Additional supplemental calcium and/or Vitamin D3 will not be permitted. Patients will be monitored for the development of hypercalcemia and/or hypercalciuria. ;
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