Abstract:
:Hypercalcemia and hypercalciuria observed both in humans and in animals who were on long-term theophylline therapy, prompted us to investigate whether oral theophylline treatment at optimal doses causes any adverse side effects on bone metabolism in mild asthmatics. Therefore, serum osteocalcin (BGP) and total alkaline phosphatase (TALP, EC 3.1.3.1) as bone formation markers, serum prolidase I (EC 3.4.13.9) activity as a marker for collagen metabolism, urinary deoxypyridinoline (Dpd), hydroxyproline (Hyp) and fasting urinary calcium as bone resorption markers, were measured in 18 mild asthmatics who had been treated with theophylline over 1-10 years. Among measured bone turnover markers, BGP, TALP, and Hyp levels were found to be increased in mild asthmatics; and BGP showed the greatest percent mean increase (98%) over the healthy subjects. However, these increments did not exceed the upper reference limits. Serum prolidase I activity was also increased in mild asthmatics receiving theophylline. Our results indicate that theophylline therapy at optimal doses may not exert adverse side effects on bone homeostasis, but patients receiving supratherapeutic doses of theophylline should be under close examination in order to predict future bone mass status.
journal_name
Pharmacol Resjournal_title
Pharmacological researchauthors
Oner P,Gürdöl F,Oner-Iyidon Y,Kolanci C,Büyüköztürk Sdoi
10.1006/phrs.1999.0486keywords:
subject
Has Abstractpub_date
1999-08-01 00:00:00pages
189-93issue
2eissn
1043-6618issn
1096-1186pii
S1043-6618(99)90486-3journal_volume
40pub_type
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