Effect of hyaluronic acid on chondrocyte apoptosis
OBJECTIVE: To determine the percentage of apoptotic cells in a contusion model of osteoarthritis (OA) and to assess whether intra-articular injection of high doses of hyaluronic acid (HA) immediately after trauma reduces chondrocyte apoptosis.METHODS: Forty knees from adult rabbits were impacted thrice with a 1 kg block released through a 1 meter tall cylinder (29.4 Joules). Subsequently, 2 mL of HA was injected in one knee and 2 mL saline in the contra-lateral knee. Medication were administered twice a week for 30 days, when animals were sacrificed. Specimens were prepared for optical microscopy exam and terminal deoxynucleotidyl transferase end labeling assay (TUNEL).RESULTS: The apoptosis rate in the contusion model was 68.01% (± 19.73%), a higher rate than previously described. HA significantly reduced the rate of apoptosis to 53.52% (± 18.09) (p <0.001).CONCLUSION: Intra-articular HA administration started immediately after trauma reduces impact-induced chondrocyte apoptosis rates in rabbits. Level of Evidence I, Experimental Study.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
ATHA EDITORA
2015
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| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-78522015000200090 |
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