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Serum insulin-like growth factor-I and pro-collagen type III N-terminal peptide in adolescent elite athletes: implications for the detection of growth hormone abuse in sport.
J Clin Endocrinol Metab. 2010 Jun; 95(6):2969-76.JC

Abstract

CONTEXT

A method based on two GH-dependent markers, IGF-I and pro-collagen type III N-terminal peptide (P-III-P), has been devised to detect exogenously administered GH. Because previous studies on the detection of GH abuse involved predominantly adult athletes, the method must be validated in adolescent athletes.

OBJECTIVE

The aim of the study was to examine serum IGF-I and P-III-P concentrations in elite adolescent athletes and to determine whether the method developed in adults is appropriate to detect GH abuse in this population.

DESIGN AND SETTING

We conducted a cross-sectional observational study at national sporting organization training events.

SUBJECTS

A total of 157 (85 males, 72 females) elite athletes between 12 and 20 yr of age participated in the study.

INTERVENTION

Serum IGF-I and P-III-P were each measured by two commercially available immunoassays. GH-2000 discriminant function scores were calculated.

RESULTS

Both IGF-I and P-III-P rose to a peak during adolescence, which was earlier in girls than in boys. All GH-2000 scores lay below the proposed cutoff limit of 3.7 (although some scores were close to this value), indicating that none of these athletes would be accused of GH doping if the GH-2000 discriminant formulae were used. The results between the two immunoassays for IGF-I and P-III-P were closely aligned.

CONCLUSIONS

The GH-2000 score rises in early adolescence, reaches a peak in athletes aged 13-16 yr, and then falls. We have found no evidence that the proposed GH-2000 score developed in adults would lead to an unacceptable rate of false-positive results in adolescent athletes, but caution may be required around the time of peak growth velocity.

Authors+Show Affiliations

The Institute of Developmental Sciences, University of Southampton, Southampton General Hospital, Tremona Road, Southampton SO16 6YD, United Kingdom.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20410221

Citation

Guha, Nishan, et al. "Serum Insulin-like Growth factor-I and Pro-collagen Type III N-terminal Peptide in Adolescent Elite Athletes: Implications for the Detection of Growth Hormone Abuse in Sport." The Journal of Clinical Endocrinology and Metabolism, vol. 95, no. 6, 2010, pp. 2969-76.
Guha N, Erotokritou-Mulligan I, Burford C, et al. Serum insulin-like growth factor-I and pro-collagen type III N-terminal peptide in adolescent elite athletes: implications for the detection of growth hormone abuse in sport. J Clin Endocrinol Metab. 2010;95(6):2969-76.
Guha, N., Erotokritou-Mulligan, I., Burford, C., Strobridge, G., Brigg, J., Drake, T., Bassett, E. E., Cowan, D., Bartlett, C., Sönksen, P. H., & Holt, R. I. (2010). Serum insulin-like growth factor-I and pro-collagen type III N-terminal peptide in adolescent elite athletes: implications for the detection of growth hormone abuse in sport. The Journal of Clinical Endocrinology and Metabolism, 95(6), 2969-76. https://doi.org/10.1210/jc.2010-0008
Guha N, et al. Serum Insulin-like Growth factor-I and Pro-collagen Type III N-terminal Peptide in Adolescent Elite Athletes: Implications for the Detection of Growth Hormone Abuse in Sport. J Clin Endocrinol Metab. 2010;95(6):2969-76. PubMed PMID: 20410221.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Serum insulin-like growth factor-I and pro-collagen type III N-terminal peptide in adolescent elite athletes: implications for the detection of growth hormone abuse in sport. AU - Guha,Nishan, AU - Erotokritou-Mulligan,Ioulietta, AU - Burford,Caroline, AU - Strobridge,Gail, AU - Brigg,Joanna, AU - Drake,Tamsin, AU - Bassett,E Eryl, AU - Cowan,David, AU - Bartlett,Christiaan, AU - Sönksen,Peter H, AU - Holt,Richard I G, Y1 - 2010/04/21/ PY - 2010/4/23/entrez PY - 2010/4/23/pubmed PY - 2010/7/2/medline SP - 2969 EP - 76 JF - The Journal of clinical endocrinology and metabolism JO - J Clin Endocrinol Metab VL - 95 IS - 6 N2 - CONTEXT: A method based on two GH-dependent markers, IGF-I and pro-collagen type III N-terminal peptide (P-III-P), has been devised to detect exogenously administered GH. Because previous studies on the detection of GH abuse involved predominantly adult athletes, the method must be validated in adolescent athletes. OBJECTIVE: The aim of the study was to examine serum IGF-I and P-III-P concentrations in elite adolescent athletes and to determine whether the method developed in adults is appropriate to detect GH abuse in this population. DESIGN AND SETTING: We conducted a cross-sectional observational study at national sporting organization training events. SUBJECTS: A total of 157 (85 males, 72 females) elite athletes between 12 and 20 yr of age participated in the study. INTERVENTION: Serum IGF-I and P-III-P were each measured by two commercially available immunoassays. GH-2000 discriminant function scores were calculated. RESULTS: Both IGF-I and P-III-P rose to a peak during adolescence, which was earlier in girls than in boys. All GH-2000 scores lay below the proposed cutoff limit of 3.7 (although some scores were close to this value), indicating that none of these athletes would be accused of GH doping if the GH-2000 discriminant formulae were used. The results between the two immunoassays for IGF-I and P-III-P were closely aligned. CONCLUSIONS: The GH-2000 score rises in early adolescence, reaches a peak in athletes aged 13-16 yr, and then falls. We have found no evidence that the proposed GH-2000 score developed in adults would lead to an unacceptable rate of false-positive results in adolescent athletes, but caution may be required around the time of peak growth velocity. SN - 1945-7197 UR - https://www.unboundmedicine.com/medline/citation/20410221/Serum_insulin_like_growth_factor_I_and_pro_collagen_type_III_N_terminal_peptide_in_adolescent_elite_athletes:_implications_for_the_detection_of_growth_hormone_abuse_in_sport_ L2 - https://academic.oup.com/jcem/article-lookup/doi/10.1210/jc.2010-0008 DB - PRIME DP - Unbound Medicine ER -