Bicalutamide plus Anastrozole for the Treatment of Gonadotropin-Independent Precocious Puberty in Boys with Testotoxicosis: A Phase II, Open-Label Pilot Study (BATT)
Abstract
OBJECTIVE: To evaluate the efficacy, tolerability, and pharmacokinetics of bicalutamide plus anastrozole in young males with testotoxicosis. METHODS: This was a multicenter, open-label, single-arm, 12-month, Phase II pilot trial in 14 males (2-9 years) with testotoxicosis treated with bicalutamide (12.5, 25, 50, or 100 mg) and anastrozole (0.5 or 1 mg) daily. The primary outcome was change in growth rate. RESULTS: At 1 year, the mean (standard deviation) change from baseline in growth rate was -1.6 (+/- 5.1) cm/year and -0.1 (+/- 1.8) SD units, and in bone maturation was -2.3 (+/- 0.5) years. The bone age/chronological age ratio was reduced from 2.1 (+/- 0.6) at baseline to 1.0 (+/- 0.4) (p = 0.00013). Steady-state trough R-bicalutamide and anastrozole concentrations were attained by Day 21 and 8, respectively. Gynecomastia (42.9%) and breast tenderness (12.5%) were the most common treatment-related adverse events. CONCLUSIONS: Treatment of testotoxicosis with bicalutamide plus anastrozole resulted in slower growth rate.
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Uncontrolled studies using anastrozole, testolactone or letrozole have shown some evidence for a positive effect on sperm concentration and motility.
“Uncontrolled studies using anastrozole, testolactone or letrozole have shown some evidence for a positive effect on sperm concentration and motility [49-51].”
From Aromatase inhibitors in men: effects and therapeutic options (2011) · cites this paper as [49]
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- Authors
- Reiter, E. O., Mauras, N., McCormick, K., Kulshreshtha, B., Amrhein, J., De Luca, F., O'Brien, S., Armstrong, J., & Melezinkova, H.
- Affiliations
- Tufts University (US)
- Nemours Children's Clinic (US)
- University of Alabama at Birmingham (US)
- All India Institute of Medical Sciences (IN)
- AstraZeneca (United Kingdom) (GB)
- Venue
- Journal of Pediatric Endocrinology and Metabolism
- Publisher
- Walter de Gruyter GmbH
- Published
- 2010-01
- Volume
- 23
- Issue
- 10
- Pages
- 999-1009
- ISSN
- 0334-018X (ISSN-L)
- 2191-0251
- OpenAlex
- W2091555378
- Cited by
- 54
- References
- 28
- Citations by year
- 2025: 1 · 2024: 6 · 2023: 5 · 2022: 6 · 2021: 3 · 2020: 2 · 2019: 5 · 2018: 6 · 2017: 2 · 2015: 8 · 2013: 3
- FWCI
- 3.41
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Pediatric Endocrinology and Metabolism (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sexual Differentiation and Disorders
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
- Keywords
- testotoxicosis, gonadotropin-independent precocious puberty, bicalutamide, anastrozole, androgen deprivation therapy, growth rate, skeletal maturation, bone age, pharmacokinetics, gynecomastia, pediatric boys
- MeSH terms
- Anastrozole, Anilides, Bone Development, Child, Child, Preschool, Drug Therapy, Combination, Gonadotropins, Growth, Humans, Male, Nitriles, Pilot Projects, Puberty, Precocious, Tosyl Compounds, Triazoles
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