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Published in: Osteoporosis International 10/2017

01-10-2017 | Original Article

Parathyroid hormone (1–34) promotes fracture healing in ovariectomized rats with type 2 diabetes mellitus

Authors: G. Y. Liu, G. L. Cao, F. M. Tian, H. P. Song, L. L. Yuan, L. D. Geng, Z. Y. Zheng, L. Zhang

Published in: Osteoporosis International | Issue 10/2017

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Abstract

Summary

Ovariectomized (OVX) rats with type 2 diabetes mellitus (T2DM) with femur fracture received vehicle, insulin, or insulin plus parathyroid hormone (PTH) treatment for 2 and 3 weeks. Radiography, histomorphometry, histology, and immunohistochemistry in callus were evaluated.

Introduction

Reports about effects of PTH plus insulin on callus formation of osteoporotic fracture with T2DM were limited. This study was designed to investigate the effects of the combination of PTH and insulin on fracture healing in OVX rats with T2DM.

Methods

Two-month-old female rats were randomly divided into five groups: normal fracture (F), OVX fracture (OF), T2DM + OVX fracture (DOF), insulin-treated (2–4 u/daylight, 4–6 u/night, DOFI), and treated with insulin and PTH (50 μg/kg/day, 5 days/week, DOFIP). A closed mid-shaft fracture was established in the right femurs of all rats after 6 weeks of OVX. Rats were euthanized at 2 and 3 weeks post-fracture according to the time schedule, respectively.

Results

The administration of insulin alone or insulin combined with PTH significantly increased mineralized bone volume fraction (BV/TV) and connectivity density (Conn.D) compared with those of the DOF group at 3 weeks post-fracture and also increased cartilaginous callus area ratio in the DOFI and DOFIP groups at 2 weeks and bony callus area ratio in the DOFIP groups at both the 2 and 3 weeks post-fracture.

Conclusions

OVX rats with T2DM exhibited a marked delay in the fracture healing process; insulin treatment ameliorated these effects, and the healing process was enhanced following treatment with a combination of insulin and PTH.
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Metadata
Title
Parathyroid hormone (1–34) promotes fracture healing in ovariectomized rats with type 2 diabetes mellitus
Authors
G. Y. Liu
G. L. Cao
F. M. Tian
H. P. Song
L. L. Yuan
L. D. Geng
Z. Y. Zheng
L. Zhang
Publication date
01-10-2017
Publisher
Springer London
Published in
Osteoporosis International / Issue 10/2017
Print ISSN: 0937-941X
Electronic ISSN: 1433-2965
DOI
https://doi.org/10.1007/s00198-017-4148-3

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