Systemic Hormones and Muscle Protein Synthesis

Summary

This study evaluates the effect of increase in testosterone levels in older males and the effects of decrease in testosterone levels in young males on muscle protein synthesis.

Timeline

Start

2016-12-15

Primary completion

2018-11-15

Completion

2019-02-15

Publications

• Background Mauras N, Hayes V, Welch S, Rini A, Helgeson K, Dokler M, Veldhuis JD, Urban RJ. Testosterone deficiency in young men: marked alterations in whole body protein kinetics, strength, and adiposity. J Clin Endocrinol Metab. 1998 Jun;83(6):1886-92. doi: 10.1210/jcem.83.6.4892.
• Background Kvorning T, Andersen M, Brixen K, Madsen K. Suppression of endogenous testosterone production attenuates the response to strength training: a randomized, placebo-controlled, and blinded intervention study. Am J Physiol Endocrinol Metab. 2006 Dec;291(6):E1325-32. doi: 10.1152/ajpendo.00143.2006. Epub 2006 Jul 25.
• Background Abbasi AA, Drinka PJ, Mattson DE, Rudman D. Low circulating levels of insulin-like growth factors and testosterone in chronically institutionalized elderly men. J Am Geriatr Soc. 1993 Sep;41(9):975-82. doi: 10.1111/j.1532-5415.1993.tb06764.x.
• Background Harman SM, Metter EJ, Tobin JD, Pearson J, Blackman MR; Baltimore Longitudinal Study of Aging. Longitudinal effects of aging on serum total and free testosterone levels in healthy men. Baltimore Longitudinal Study of Aging. J Clin Endocrinol Metab. 2001 Feb;86(2):724-31. doi: 10.1210/jcem.86.2.7219.
• Background Baker JR, Bemben MG, Anderson MA, Bemben DA. Effects of age on testosterone responses to resistance exercise and musculoskeletal variables in men. J Strength Cond Res. 2006 Nov;20(4):874-81. doi: 10.1519/R-18885.1.
• Background Kumar V, Selby A, Rankin D, Patel R, Atherton P, Hildebrandt W, Williams J, Smith K, Seynnes O, Hiscock N, Rennie MJ. Age-related differences in the dose-response relationship of muscle protein synthesis to resistance exercise in young and old men. J Physiol. 2009 Jan 15;587(1):211-7. doi: 10.1113/jphysiol.2008.164483. Epub 2008 Nov 10.
• Background Vingren JL, Kraemer WJ, Ratamess NA, Anderson JM, Volek JS, Maresh CM. Testosterone physiology in resistance exercise and training: the up-stream regulatory elements. Sports Med. 2010 Dec 1;40(12):1037-53. doi: 10.2165/11536910-000000000-00000.

Drugs

Indications