Bone loss from the proximal femur continues into the nineties and low bone mass leads to an increased susceptibility to fracture. The risk of fracture accelerates between age 80-90 so that 33% of women and 17% of men sustain a hip fracture. Hip fractures cause an immediate 15% mortality, and will cost 20 billion dollars annually within 20 years. Two major factors play a role in the bone loss. Estrogen deficiency after the menopause is associated with increased bone loss from the femur. In the mid sixties a second factor emerges - malabsorption of calcium, which increases the degree of negative calcium balance causing secondary hyperparathyroidism and bone loss. By correcting estrogen deficiency and malabsorption of calcium it may be possible to reverse bone loss from the proximal femur. In order to test this hypothesis, 500 osteopenic women aged between 65-77 years will be treated with either estrogen, 1 alpha- hydroxyvitamin D2 (1 alpha-OH-D2) or a combination of estrogen and 1 alpha- OH-D2 for 3 years in an attempt to reverse bone loss from the proximal femur. It is suggested that estrogen will inhibit bone resorption and 1 alpha-OH-D2 will stimulate bone formation, and that the combination will be more effective than single therapy. The study will be double blind and placebo controlled. The primary outcome will be bone mineral density of the proximal femur, however, other areas of the skeleton will be measured so that any effect of therapy which might cause redistribution of bone mineral from cortex to trabecular sites can be detected. Loss of cortical bone could increase fracture susceptibility. Reversing bone loss from the proximal femur from age 65 for several years could maintain bone density above the fracture threshold and significantly reduce the risk of fracture. Not only would this provide considerable individual health benefits, but also greatly reduce health care costs.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project--Cooperative Agreements (U01)
Project #
5U01AG010373-05
Application #
2051626
Study Section
Biological and Clinical Aging Review Committee (BCA)
Project Start
1991-09-30
Project End
1996-08-31
Budget Start
1995-09-01
Budget End
1996-08-31
Support Year
5
Fiscal Year
1995
Total Cost
Indirect Cost
Name
Creighton University
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
City
Omaha
State
NE
Country
United States
Zip Code
68178
Yalamanchili, Vinod; Gallagher, J Christopher (2012) Treatment with hormone therapy and calcitriol did not affect depression in older postmenopausal women: no interaction with estrogen and vitamin D receptor genotype polymorphisms. Menopause 19:697-703
Sai, Adarsh J; Gallagher, J Christopher; Fang, Xiang (2011) Effect of hormone therapy and calcitriol on serum lipid profile in postmenopausal older women: association with estrogen receptor-? genotypes. Menopause 18:1101-12
Sai, A J; Walters, R W; Fang, X et al. (2011) Relationship between vitamin D, parathyroid hormone, and bone health. J Clin Endocrinol Metab 96:E436-46
Gallagher, J C; Rapuri, Prema; Smith, Lynette (2007) Falls are associated with decreased renal function and insufficient calcitriol production by the kidney. J Steroid Biochem Mol Biol 103:610-3
Gallagher, J Christopher; Rapuri, Prema B; Smith, Lynette M (2007) An age-related decrease in creatinine clearance is associated with an increase in number of falls in untreated women but not in women receiving calcitriol treatment. J Clin Endocrinol Metab 92:51-8
Rapuri, Prema B; Gallagher, J Christopher; Smith, Lynette M (2007) Smoking is a risk factor for decreased physical performance in elderly women. J Gerontol A Biol Sci Med Sci 62:93-100
Rapuri, P B; Gallagher, J C; Knezetic, J A et al. (2006) Estrogen receptor alpha gene polymorphisms are associated with changes in bone remodeling markers and treatment response to estrogen. Maturitas 53:371-9
Rapuri, Prema B; Gallagher, J Christopher; Haynatzki, Gleb (2004) Endogenous levels of serum estradiol and sex hormone binding globulin determine bone mineral density, bone remodeling, the rate of bone loss, and response to treatment with estrogen in elderly women. J Clin Endocrinol Metab 89:4954-62
Gallagher, J C (2004) The effects of calcitriol on falls and fractures and physical performance tests. J Steroid Biochem Mol Biol 89-90:497-501
Rapuri, P B; Gallagher, J C; Knezetic, J A et al. (2004) Association between Vitamin D receptor polymorphisms and the rate of bone loss in elderly women-importance of adjusting for dietary and lifestyle factors. J Steroid Biochem Mol Biol 89-90:503-6

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