Testosterone & bone

Testosterone & Bone
Davis, S. R., P. McCloud, et al. (1995). "Testosterone enhances estradiol's effects on postmenopausal bone density and sexuality." Maturitas 21(3): 227-36. To investigate the role of androgens in increasing bone density and improving low libido in postmenopausal women, we have studied the long-term effects of estradiol and testosterone implants on bone mineral density and sexuality in a prospective, 2 year, single-blind randomised trial. Thirty-four postmenopausal volunteers were randomised to treatment with either estradiol implants 50 mg alone (E) or estradiol 50 mg plus testosterone 50 mg (E&T), administered 3-monthly for 2 years. Cyclical oral progestins were taken by those women with an intact uterus. Thirty-two women completed the study. BMD (DEXA) of total body, lumbar vertebrae (L1-L4) and hip area increased significantly in both treatment groups. BMD increased more rapidly in the testosterone treated group at all sites. A substantially greater increase in BMD occurred in the E&T group for total body (P < 0.008), vertebral L1-L4 (P < 0.001) and trochanteric (P < 0.005) measurements. All sexual parameters (Sabbatsberg sexual self-rating scale) improved significantly in both groups. Addition of testosterone resulted in a significantly greater improvement compared to E for sexual activity (P < 0.03), satisfaction (P < 0.03), pleasure (P < 0.01), orgasm (P < 0.035) and relevancy (P < 0.05). Total cholesterol and LDL-cholesterol fell in both groups as did total body fat. Total body fat-free mass (DEXA, anthropometry, impedance) increased in the E&T group only. We concluded that in postmenopausal women, treatment with combined estradiol and testosterone implants was more effective in increasing bone mineral density in the hip and lumbar spine than estradiol implants alone. Significantly greater improvement in sexuality was observed with combined therapy, verifying the therapeutic value of testosterone implants for diminished libido in postmenopausal women. The favourable estrogenic effects on lipids were preserved in women treated with T, in association with beneficial changes in body composition. Miller, B. E., M. J. De Souza, et al. (2000). "Sublingual administration of micronized estradiol and progesterone, with and without micronized testosterone: effect on biochemical markers of bone metabolism and bone mineral density." Menopause 7(5): 318-26. OBJECTIVES: The purpose of this investigation was to evaluate the relative efficacy of the sublingual administration of micronized estradiol (E2), progesterone (P4), and testosterone (T) on bone mineral density and biochemical markers of bone metabolism. DESIGN: In this double-blind, prospective study, postmenopausal women were randomly assigned to one of four treatment groups: hysterectomized women were assigned to either 1) micronized E2 (0.5 mg) or 2) micronized E2 (0.5 mg) + micronized T (1.25 mg). Women with intact uteri were assigned to either 3) micronized E2 (0.5 mg) + micronized P4 (100 mg) or 4) micronized E2 (0.5 mg) + micronized P4 (100 mcg) + micronized T (1.25 mg). For the purpose of this study, the four treatment groups were combined into two groups for all comparisons. The E2 and E2+P4 groups were combined into the HRT alone group (n=30), and the E2+T and E2+P4+T groups were combined into the HRT + T group (n=27). Hormones were administered sublingually as a single tablet twice a day for 12 months. Bone mineral density was measured in the anterior-posterior lumbar spine and total left hip via dual energy x-ray absorptiometry. Bone metabolism was assessed via serum bone-specific 62C Diana Drive, Wairau Valley, North Shore City 0627, Auckland, New Zealand P O Box 101-142, North Shore Mail Centre 0745, Auckland, New Zealand Ph 64-9-442 5850, Fax 64-9-445 5851 Email: info@pharmaceutical.co.nz Website: www.pharmaceutical.co.nz alkaline phosphatase and urinary deoxypyridinoline and cross-linked N-telopeptide of type I collagen, both normalized to creatinine. Data were analyzed via a repeated measures analysis of variance and a Student's t test (alpha=0.05). RESULTS: The subjects were of similar age (54.0 +/- 0.8 years), height (64.0 +/- 0.3 in), weight (157.6 +/- 4.2 lb), and had similar baseline follicle-stimulating hormone (66.4 +/- 3.2 mIU/L), E2 (26.4 +/- 1.5 pg/ml), P4 (0.3 +/- 0.1 ng/ml), total T (19.0 +/- 1.5 ng/dL), and bioavailable T (3.7 +/- 0.3 ng/dL) levels. During therapy, serum levels increased (p < 0.05) for each hormone. Bone mineral density and bone markers at baseline were similar for each treatment group. Bone-specific alkaline phosphatase decreased (p < 0.05) by -14.3 +/- 4.1% in the HRT alone group and by -8.2 +/- 4.6% in the HRT + T group. Deoxypyridinoline levels decreased significantly in the HRT alone and HRT + T groups, - 14.4 +/- 6.8% and -26.9 +/- 7.6%, respectively. Significant reductions (p < 0.05) in cross-linked N-telopeptide of type I collagen were also observed in both groups, -24.4 +/- 6.5% and -39.5 +/- 8.6%, respectively. Bone mineral density in the lumbar spine increased (p < 0.05) by +2.2 +/- 0.5% the HRT alone group and by + 1.8 +/- 0.6% in the HRT + T group. Total hip bone mineral density was maintained in the HRT alone group (+0.4 +/- 0.4%) and increased (p < 0.05) in the HRT + T group (+ 1.8 +/- 0.5%). CONCLUSIONS: Sublingual micronized HRT favorably decreases serum and urine markers of bone metabolism, prevents bone loss, and results in a slight increase in spine and hip bone mineral density. Although the addition of testosterone to HRT for 1 year did not result in added benefit to the spine bone mineral density, it did result in a significant increase in hip bone mineral density. Longer duration of therapy may have further improved these outcomes. Miller, K. K., B. M. Biller, et al. (2006). "Effects of testosterone replacement in androgen-deficient women with hypopituitarism: a randomized, double-blind, placebo-controlled study." J Clin Endocrinol Metab 91(5): 1683-90. CONTEXT: Hypopituitarism in women is characterized by profound androgen deficiency due to a loss of adrenal and/or ovarian function. The effects of testosterone replacement in this population have not been reported. OBJECTIVE: The objective of the study was to determine whether physiologic testosterone replacement improves bone density, body composition, and/or neurobehavioral function in women with severe androgen deficiency secondary to hypopituitarism. DESIGN: This was a 12-month randomized, placebo-controlled study. SETTING: The study was conducted at a general clinical research center. STUDY PARTICIPANTS: Fifty-one women of reproductive age with androgen deficiency due to hypopituitarism participated. INTERVENTION: Physiologic testosterone administration using a patch that delivers 300 microg daily or placebo was administered. MAIN OUTCOME MEASURES: Bone density, fat-free mass, and fat mass were measured by dual x-ray absorptiometry. Thigh muscle and abdominal cross-sectional area were measured by computed tomography scan. Mood, sexual function, quality of life, and cognitive function were assessed using self-administered questionnaires. RESULTS: Mean free testosterone increased into the normal range during testosterone administration. Mean hip (P = 0.023) and radius (P = 0.007), but not posteroanterior spine, bone mineral density increased in the group receiving testosterone, compared with placebo, as did mean fat-free mass (P = 0.040) and thigh muscle area (P = 0.038), but there was no change in fat mass. Mood (P = 0.029) and sexual function (P = 0.044) improved, as did some aspects of quality of life, but not cognitive function. Testosterone at 62C Diana Drive, Wairau Valley, North Shore City 0627, Auckland, New Zealand P O Box 101-142, North Shore Mail Centre 0745, Auckland, New Zealand Ph 64-9-442 5850, Fax 64-9-445 5851 Email: info@pharmaceutical.co.nz Website: www.pharmaceutical.co.nz physiologic replacement levels was well tolerated, with few side effects. CONCLUSIONS: This is the first randomized, double-blind, placebo-controlled study to show a positive effect of testosterone on bone density, body composition, and neurobehavioral function in women with severe androgen deficiency due to hypopituitarism. Watts, N. B., M. Notelovitz, et al. (1995). "Comparison of oral estrogens and estrogens plus androgen on bone mineral density, menopausal symptoms, and lipid-lipoprotein profiles in surgical menopause." Obstet Gynecol 85(4): 529-37. OBJECTIVE: To compare an oral estrogen-androgen combination with estrogens alone on bone, menopausal symptoms, and lipoprotein profiles in postmenopausal women. METHODS: Surgically menopausal women received oral esterified estrogens (1.25 mg), or esterified estrogens (1.25 mg) and methyltestosterone (2.5 mg) daily, for 2 years. Bone mineral density of the lumbar spine and hip, menopausal symptoms, lipoprotein profiles, and biochemical and hematologic indices were evaluated. RESULTS: Sixty-six patients were enrolled in the study. Both treatment regimens prevented bone loss at the spine and hip; combined estrogen-androgen therapy was associated with a significant increase in spinal bone mineral density compared with baseline (n = 24; mean score +/- standard error 3.4 +/- 1.2%, P < .01). In the estrogen group, high-density lipoprotein (HDL) cholesterol increased significantly and low-density lipoprotein cholesterol decreased significantly. Cholesterol, HDL cholesterol, and triglycerides decreased significantly in the estrogen-androgen group. Menopausal symptoms of somatic origin (hot flashes, vaginal dryness, and insomnia) were improved significantly by both treatments. Neither adverse hepatic effects nor significant safety or tolerance problems were reported in either group. CONCLUSION: Oral estrogen-androgen increased vertebral bone mineral density compared with pre-treatment values and relieved somatic symptoms. Safety indices, including lipoprotein levels, indicated that the combination was well tolerated over the 2 years of treatment. 62C Diana Drive, Wairau Valley, North Shore City 0627, Auckland, New Zealand P O Box 101-142, North Shore Mail Centre 0745, Auckland, New Zealand Ph 64-9-442 5850, Fax 64-9-445 5851 Email: info@pharmaceutical.co.nz Website: www.pharmaceutical.co.nz

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