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• W4308134636 abstract "Abstract Context Male hypogonadism adversely affects body composition, bone mineral density (BMD), and metabolic health. A previous report showed that pre-treatment testosterone (T) levels of &lt;200 ng/dL is associated with greater improvement in spine BMD with T therapy. However, to date, there is no study investigating whether baseline T levels also influences body composition and metabolic response to T therapy. Objective To determine if there are differences in the changes in body composition, metabolic profile, and bone turnover markers, in addition to BMD, in response to T therapy in men with baseline T level of &lt; 264 ng/dL compared to those with levels ≥264ng/dL Methods: Secondary analysis of single-arm, open-label clinical trial (NCT01378299) on pharmacogenetics of response to T therapy conducted between 2011-2016 involving 105 men (40-74 years old), with average morning T &lt; 300 ng/dL, given intramuscular T cypionate 200 mg every 2 weeks for 18 months. Subjects were divided into those with baseline T levels of &lt; 264 ng/dL (N=43) and those with ≥264 ng/dL (N=57). T and estradiol (E2) were measured by liquid chromatography/mass spectrometry; serum bone turnover markers (C-telopeptide [CTX], osteocalcin, sclerostin), adiponectin, and leptin by enzyme-linked immunosorbent assay; glycated hemoglobin (HbA1c) by high-performance liquid chromatography, areal BMD, and body composition by dual-energy x-ray absorptiometry (DXA). Results Men with T &lt; 264 ng/dL showed greater increases in total fat-free mass (FFM) at 18 months compared to those with T ≥ 264 ng/dL (4.2±4.1 vs 2.7±3.8%; p=0.047) and unadjusted appendicular FFM at 6 and 18 months (8.7±11.5 vs 4.4±4.3%, 7.3±11.6 vs 2.4±6.8%; p=0.033 and p=0.043, respectively). Men with T ≥ 264 ng/dL showed significant decreases in HbA1c at 12 months (-3.1±9.2 vs 3.2±13.9%; p=0.005), fasting glucose at 18 months (-4.2±31.9 vs 13.0±57.3%; p=0.040), LDL at 6 months (-6.4±27.5 vs 12.8±44.1%; p=0.034), leptin at 18 months (-40.2±35.1 vs -27.6±31.0%; p=0.034) compared to those with T &lt; 264 ng/dL. No significant differences in BMD and bone turnover markers were observed. Conclusion T therapy results in improvement in body composition irrespective of baseline T levels but T &lt;264 ng/dL is associated with greater improvement in FFM, whereas T level of ≥264 ng/dL favors improvement in metabolic profile. Presentation: Monday, June 13, 2022 12:15 p.m. - 12:30 p.m." @default.
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• W4308134636 date "2022-11-01" @default.
• W4308134636 modified "2023-09-30" @default.
• W4308134636 title "OR25-6 In Men on Testosterone Therapy, Baseline Testosterone Level of &lt;264 ng/dL is Associated with Greater Improvement in Body Composition, While Level of ≥264 ng/dL Favors Improvement in Metabolic Profile" @default.
• W4308134636 doi "https://doi.org/10.1210/jendso/bvac150.1415" @default.
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