Bibliographic Details
| Title: |
The effects of long-term testosterone treatment on endocrine parameters in hypogonadal men: 12-year data from a prospective controlled registry study. |
| Authors: |
Yassin, Aksam1,2 (AUTHOR) yassin@t-online.de, Saad, Farid2,3 (AUTHOR), Alwani, Mustafa4,5 (AUTHOR), Aboumarzouk, Omar M.1 (AUTHOR), Al-Zoubi, Raed M.1 (AUTHOR), Nettleship, Joanne6 (AUTHOR), Kelly, Daniel6,7 (AUTHOR), Al-Ansari, Abdulla1,2 (AUTHOR) |
| Source: |
Aging Male. Dec2022, Vol. 25 Issue 1, p185-191. 7p. |
| Abstract: |
Testosterone therapy (TTh) is the primary treatment for aging men with functional hypogonadism. Whilst the benefits of testosterone (T) replacement are well-evidenced, the long-term data for TTh on metabolic and endocrine parameters is limited. Here we present the effect of TTh on endocrine parameters in hypogonadal men at a 12-year follow-up. In this single-centre, cumulative, prospective, registry study, 321 hypogonadal men (mean age: 58.9 years) received testosterone undecanoate injections in 12-week intervals for up to 12 years. Blood samples were taken at every other visit to measure levels of total T (TT), calculated free T, sex hormone-binding globulin (SHBG), estradiol, luteinizing hormone (LH), follicle-stimulating hormone (FSH), progesterone and prolactin. We observed an increase in TT of 15.5 nmol/L (p < 0.0001), a reduction in SHBG of 10.5 nmol/L (p < 0.0001) and an increase in calculated free T of 383.04 pmol/L (p < 0.0001) over the study period. This was accompanied by an increase in estradiol levels by 14.9 pmol/L (p < 0.0001), and decreases in progesterone (0.2 ng/mL, p < 0.0001), LH (10.4 U/L, p < 0.0001) and FSH (8.4 U/L, p < 0.0001) were demonstrated at 12-years. The levels of prolactin remained unchanged. Long-term TTh altered hormonal parameters to predictably modify the endocrine system. These effects were sustained during the entire observation time of 12 years. [ABSTRACT FROM AUTHOR] |
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