Following impact, immune cells rush in to help clean and repair the damaged site and begin pumping out enzymes, including matrix metalloproteinases and aggrecanases.

关节遭受冲击后，免疫细胞涌入以帮助清理和修复受损部位，并释放包括基质金属蛋白酶和聚集蛋白聚糖酶在内的酶。