期刊
JOURNAL OF ORTHOPAEDIC RESEARCH
卷 20, 期 5, 页码 910-919出版社
WILEY
DOI: 10.1016/S0736-0266(02)00009-8
关键词
tendon; repair; model; IGF-I
类别
Flexor tendinitis is a common and debilitating injury of elite and recreational athletes. Healing may be improved through intratendinous injection of insulin-like growth factor-I (IGF-I), which has been shown in vitro to stimulate mitogenesis and enhance tendon matrix production. This Study investigated the effects of intratendinous injection of IGF-I oil tendon healing in all equine model of flexor tendinitis. Collagenase-induced lesions were created in the tensile region of the flexor digitorum superficialis tendon of both forelimbs of eight horses. Treated tendons were injected with 2 mug rhIGF-I intralesionally every other day for 10 injections, while controls received 0.9% NaCl. Tendon fiber deposition and organization were evaluated serially using ultrasonography throughout the 8 week trial period. Following euthanasia, the tendons were harvested and DNA, hydroxyproline, and glycosaminoglycan content determined, mechanical strength and stiffness evaluated, gene expression and spatial arrangement of collagen types I and III assessed by northern blot and in situ hybridization, and tendon fiber architecture assessed by polarized light microscopy. Local soft tissue swelling was reduced in the IGF-I treated limbs. Similarly, lesion size in IGF-1 treated tendons was smaller 3 and 4 weeks after initiation of treatment. Cell proliferation and collagen content of the IGF-I treated tendons were increased compared to controls. Mechanically, IGF-I treated tendons showed a trend toward increased stiffness compared to saline treated controls. Considered together with the decreased soft tissue swelling and improved sonographic healing, these data support the potential use of intralesional IGF-1 for treatment of debilitating tendon injuries. (C) 2002 Orthopaedic Research Society. Published by Elsevier Science Ltd. All rights reserved.
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