1.Additive Effects of Intra-articular Injection of Growth Hormone and Hyaluronic Acid in Rabbit Model of Collagenase-induced Osteoarthritis.
Sang Beom KIM ; Dong Rak KWON ; Hyun KWAK ; Yong Beom SHIN ; Hyun jung HAN ; Jong Hwa LEE ; Seok Hwa CHOI
Journal of Korean Medical Science 2010;25(5):776-780
In a rabbit model of collagenase-induced osteoarthritis, the additive effects of intra-articular recombinant human growth hormone (GH) administration to hyaluronic acid (HA) were evaluated. After intra-articular collagenase injection, mature New Zealand white rabbits (n=30) were divided into 3 groups. Group 1 (control rabbits) received once weekly intra-articular saline injections for 4 weeks. Group 2 rabbits received 6 mg HA injections, and group 3 rabbits were injected with 6 mg HA and 3 mg recombinant human GH. These injections were initiated 4 weeks after collagenase injections. Lameness was observed for 9 weeks after collagenase injections. Macroscopic and histopathological knee joint findings were also evaluated at the end of 9 weeks after collagenase injections. Although all animals had lameness after collagenase injections, the duration and severity of lameness were significantly shorter and less severe in group 3 than group 1 and 2 (P<0.01). Macroscopic scores showed that femoral condyles of group 3 rabbits received significantly less cartilage damage than those of groups 1 and 2 rabbits (P<0.01). Histopathological score was also the lowest in group 3 (P<0.01). These results suggest that co-injection of intra-articular HA and recombinant human GH is more effective than HA injections alone in an osteoarthritis model.
Animals
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*Collagenases
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*Disease Models, Animal
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Drug Combinations
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Drug Synergism
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Human Growth Hormone/*administration & dosage
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Humans
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Hyaluronic Acid/*administration & dosage
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Injections, Intra-Articular
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Male
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Osteoarthritis/*chemically induced/diagnosis/*drug therapy
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Rabbits
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Treatment Outcome