Theophylline Treatment for Pseudohypoparathyroidism

Summary

Pseudohypoparathyroidism is a genetic disorder with limited treatment options. Patients have early-onset obesity, short stature and increased risk of type 2 diabetes. This phase 2 clinical trial will test the efficacy of theophylline, a phosphodiesterase inhibitor, in pseudohypoparathyroidism. The investigators hypothesize that theophylline will cause weight loss, improve glucose tolerance and slow growth plate closure in children and young adults.

Timeline

Start

2018-09-01

Primary completion

2026-12-01

Completion

2026-12-01

Publications

• Background Shoemaker AH, Juppner H. Nonclassic features of pseudohypoparathyroidism type 1A. Curr Opin Endocrinol Diabetes Obes. 2017 Feb;24(1):33-38. doi: 10.1097/MED.0000000000000306.
• Background Wang L, Shoemaker AH. Eating behaviors in obese children with pseudohypoparathyroidism type 1a: a cross-sectional study. Int J Pediatr Endocrinol. 2014;2014(1):21. doi: 10.1186/1687-9856-2014-21. Epub 2014 Oct 15.
• Background Shoemaker AH, Lomenick JP, Saville BR, Wang W, Buchowski MS, Cone RD. Energy expenditure in obese children with pseudohypoparathyroidism type 1a. Int J Obes (Lond). 2013 Aug;37(8):1147-53. doi: 10.1038/ijo.2012.200. Epub 2012 Dec 11.
• Background Mano T, Uchimura K, Hayashi R, Kobahashi T, Fujiwara K, Makino M, Kakizawa H, Nagata M, Nakai A, Wada M, Nagasaka A, Itoh M. Increased urinary phosphate excretion in pseudohypoparathyroidism type II with long-term treatment with phosphodiesterase inhibitor. Horm Metab Res. 1999 Nov;31(11):602-5. doi: 10.1055/s-2007-978804.
• Background Landreth H, Malow BA, Shoemaker AH. Increased Prevalence of Sleep Apnea in Children with Pseudohypoparathyroidism Type 1a. Horm Res Paediatr. 2015;84(1):1-5. doi: 10.1159/000381452. Epub 2015 Apr 23.
• Background Perez KM, Lee EB, Kahanda S, Duis J, Reyes M, Juppner H, Shoemaker AH. Cognitive and behavioral phenotype of children with pseudohypoparathyroidism type 1A. Am J Med Genet A. 2018 Feb;176(2):283-289. doi: 10.1002/ajmg.a.38534. Epub 2017 Nov 28.
• Background Curley KL, Kahanda S, Perez KM, Malow BA, Shoemaker AH. Obstructive Sleep Apnea and Otolaryngologic Manifestations in Children with Pseudohypoparathyroidism. Horm Res Paediatr. 2018;89(3):178-183. doi: 10.1159/000486715. Epub 2018 Feb 16.
• Background Hanna P, Grybek V, Perez de Nanclares G, Tran LC, de Sanctis L, Elli F, Errea J, Francou B, Kamenicky P, Linglart L, Pereda A, Rothenbuhler A, Tessaris D, Thiele S, Usardi A, Shoemaker AH, Kottler ML, Juppner H, Mantovani G, Linglart A. Genetic and Epigenetic Defects at the GNAS Locus Lead to Distinct Patterns of Skeletal Growth but Similar Early-Onset Obesity. J Bone Miner Res. 2018 Aug;33(8):1480-1488. doi: 10.1002/jbmr.3450. Epub 2018 Jun 7.

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Indications