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Plasma biomarker proteins for detection of human growth hormone administration in athletes

Abstract

Human growth hormone (GH) is a naturally occurring hormone secreted by the pituitary gland with anabolic and growth-promoting activities. Since an increased availability of recombinant GH (rGH) for the treatment of GH-deficient patients, GH has been abused in sports and it is prohibited. "GH-isoform" and "biomarkers" tests are currently available for detection of GH abuse in sports, however both methods suffer from shortcomings. Here, we report on a proteomic approach to search for novel protein biomarkers associated with rGH administration in non-elite athletes. In this study, participants received either placebo or rGH for 8 weeks, and were followed over a 6-week washout period. We used 2-D DIGE and iTRAQ LC-MS/MS analyses to expose rGH-dependent marker proteins. Eight rGH-dependent plasma proteins namely apolipoproptein-L1, alpha-HS-glycoprotein, vitamin D-binding protein, afamin, insulin-like growth factor-binding protein-3, insulin-like growth factor-binding protein-ALS, lumican and extracellular matrix proteins 1 were identified. Apolipoprotein L1 and alpha-HS-glycoprotein were validated by Western blots to confirm their identities and expression patterns in rGH- and placebo-treated subject cohorts. Independent confirmation of these putative GH-responsive biomarkers would be of value for clinical practices and may have sports anti-doping utility.

Type Journal
ISBN 2045-2322 (Electronic) 2045-2322 (Linking)
Authors Tan, S. H.; Lee, A.; Pascovici, D.; Care, N.; Birzniece, V.; Ho, K.; Molloy, M. P.; Khan, A.
Responsible Garvan Author (missing name)
Publisher Name Scientific Reports
Published Date 2017-08-30
Published Volume 7
Published Issue 1
Published Pages 10039
Status Published in-print
DOI 10.1038/s41598-017-09968-7
URL link to publisher's version https://www.ncbi.nlm.nih.gov/pubmed/28855568