The effects of low-intensity pulsed ultrasound upon diabetic fracture healing.
In the United States, over 17 million people are diagnosed with type 1 diabetes mellitus (DM) with its inherent morbidity of delayed bone healing and nonunion. Recent studies demonstrate the utility of pulsed low-intensity ultrasound (LIPUS) to facilitate fracture healing. The current study evaluated the effects of daily application of LIPUS on mid-diaphyseal femoral fracture growth factor expression, cartilage formation, and neovascularization in DM and non-DM BB Wistar rats. Polymerase chain reaction (PCR) and ELISA assays were used to measure and quantify growth factor expression. Histomorphometry assessed cartilage formation while immunohistochemical staining for PECAM evaluated neovascularization at the fracture site. In accordance with previous studies, LIPUS was shown to increase growth factor expression and cartilage formation. Our study also demonstrated an increase in fracture callus neovascularization with the addition of LIPUS. The DM group showed impaired growth factor expression, cartilage formation, and neovascularization. However, the addition of LIPUS significantly increased all parameters so that the DM group resembled that of the non-DM group. These findings suggest a potential role of LIPUS as an adjunct for DM fracture treatment.
Coords
Michael
M
Department of Orthopaedics, University of Medicine and Dentistry of New Jersey-New Jersey Medical School, 185 South Orange Avenue, Newark, New Jersey 07103, USA.
Breitbart
Eric
E
Paglia
David
D
Kappy
Nikolas
N
Gandhi
Ankur
A
Cottrell
Jessica
J
Cedeno
Natalie
N
Pounder
Neill
N
O'Connor
J Patrick
JP
Lin
Sheldon S
SS
D000818:Animals; D020219:Chondrogenesis; D048909:Diabetes Complications / Q000628:therapy*; D005264:Femoral Fractures / Q000150:complications / Q000378:metabolism / Q000473:pathology / Q000628:therapy*; D005269:Femur / Q000098:blood supply / Q000378:metabolism / Q000473:pathology; D017102:Fracture Healing; D007150:Immunohistochemistry; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism*; D018919:Neovascularization, Physiologic; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D014464:Ultrasonic Therapy
D036341:Intercellular Signaling Peptides and Proteins; D019408:Platelet Endothelial Cell Adhesion Molecule-1