Body weight was measured, and body fat distribution was determined by dual energy x-ray in early postmenopausal women given either oral calcium (500 mg/day; control group; n ϭ 12) or hormonal replacement therapy (HRT), a combination of estradiol valerate (2 mg/day for 21 days) with cyproterone acetate (1 mg/day in the last 10 days of the treatment cycle; n ϭ 15). There were no differences in basal body weight or body fat distribution in the two groups before the study. In the control group, a significant (P Ͻ 0.05) increase in body weight (from 61.8 Ϯ 2.1 to 63.3 Ϯ 1.9 kg after 12 months) paralleled a slight, but significant (P Ͻ 0.05), increase in total body fat mass (from 23.8 Ϯ 2.2 to 24.7 Ϯ 2.2 kg), with an increase in fat in the trunk (from 10.2 Ϯ 0.4 to 11.3 Ϯ 0.4 kg; P Ͻ 0.01) and arms (from 2.4 Ϯ 0.5 to 2.7 Ϯ 0.2 kg; P Ͻ 0.05). These findings demonstrate a shift to a prevalent central android fat distribution after 12 months of observation in untreated postmenopausal women. Conversely, in the HRT group, total body bone mineral showed a significant (from 1089 Ϯ 28 to 1106 Ϯ 29 mg/cm 2 ; P Ͻ 0.05) increase after 12 months, with no significant increase in body weight (from 62.2 Ϯ 1.6 to 62.7 Ϯ 1.6 kg), and no modifications in trunk (from 10.0 Ϯ 0.2 to 9.8 Ϯ 0.3 kg) and arm (from 2.43 Ϯ 0.2 to 2.5 Ϯ 0.1 kg) fat, but a significant increase in leg fat (from 7.1 Ϯ 0.3 to 8.3 Ϯ 0.4 kg; P Ͻ 0.05). The present results suggest that HRT can counteract at least in part the postmenopausal increase in body weight and body fat and prevent central body fat distribution after menopause. (J Clin Endocrinol Metab 82: 414 -417, 1997)

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The aim of the present study was to assess the effects of the new fluorine pro-drug monofluorophosphate (MFP) in postmenopausal women with vertebral osteopenia and high bone turnover. We enrolled postmenopausal women (PMW, 43-59 years) who had had a natural menopause 2-5 years before the study, had vertebral bone mineral density (BMD) < 1 SD from the premenopausal mean, and had at least one of the biochemical markers of bone remodeling > 1 SD over the mean for premenopausal women. Patients were randomly divided into two treatment groups (group 1, 500 mg/day of oral calcium; group 2, MFP at the dose of 20 mg F-equivalents + 600 mg calcium/day) for 2 years (n = 21 in each group). The lumbar vertebral (L2-4) BMD and total body bone mineral (TBBM) were measured by dual-energy X-ray absorptiometry (Lunar DPX, Lunar Corporation, USA). Urinary hydroxyproline excretion (OH-P/Cr), plasma bone Gla protein (BGP) and serum alkaline phosphatase (AP) were assayed. In group 1 the markers of bone turnover and vertebral BMD did not show any significant modification, while TBBM showed a significant (p < 0.05) decrease after 24 months. In group 2 a significant (p < 0.05) decrease in OH-P/Cr (-23.9 +/- 2.0%), and an increase in both BGP (+19.4 +/- 2.6%) and AP (+10.3 +/- 2.6%) levels were observed after 24 months of MFP administration. In this group, both vertebral BMD (+5.01 +/- 0.9%, p < 0.01) and TBBM (+4.0 +/- 0.6%, p < 0.05) showed a significant increase after 24 months. Present results suggest that, in osteopenic PMW, MFP administration induces a significant increase in vertebral BMD without impairment of cortical bone, with a reduction in bone resorption and an increase in bone formation rate.