Effect of Oral Nonionic Polymeric Micelles Delivered Parathyroid Hormone cDNA on Bone Density and Microarchitecture

Author(s): Sung-Hsiung Chen, Jih-Yang Ko, Fong-Fu Chou*

Journal Name: Current Gene Therapy

Volume 17 , Issue 3 , 2017

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Introduction: Parathyroid Hormone (PTH) is an effective therapeutic agent for osteoporosis, but the treatment requires long-term daily injections. Oral gene delivery is a less invasive alternative to daily injections.

Objective: The aim of this study is to investigate the effect of orally administered nonionic polymeric micelles of plasmid cDNA containing human cytomegalovirus promoter (PCMV)-PTH (1-34) plus EDTA on body mineral density and bone microstructure in ovariectomized rats.

Material and Methods: A total of 27 Spraque-Dawley female rats were subjected to a bilateral ovariectomy. One month following the ovariectomy, they were randomly assigned to three groups: (1) (PCMVPTH (1-34) cDNA in polyethylene oxide-polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) polymeric micelle formations plus EDTA); (2) PCMV-PTH (1-34) cDNA and (3) drinking water. The treatment was administered by oral gavage on day 1, 2, 7, 14, and 21 at 8-hour intervals. Body mineral density, bone volume fraction, and trabecular thickness of the lumbar spine and femoral neck were examined with peripheral quantitative computed tomography at pre- and post-intervention (3 months after the start of the intervention) and analyzed using two-way repeated measures analysis of variance.

Results: Results showed that bone mineral density, bone volume fraction and trabecular thickness were significantly increased in Group 1 over time, compared with those in Group 2 and Group 3.

Conclusion: In conclusion, significantly improved bone mineral density and bone microstructure were observed in ovariectomized rats treated with PTH (1-34) cDNA delivered by nonionic polymeric micelles.

Keywords: Bone mineral density, Parathyroid hormone, Oral gene, Bone microstructure, cDNA, PCMV.

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Article Details

Year: 2017
Published on: 12 December, 2017
Page: [228 - 234]
Pages: 7
DOI: 10.2174/1566523217666171004162326
Price: $65

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