Abstract
Flexor tendon repair in zone II is complicated by adhesions to the surrounding fibro-osseous sheath. Lactate is an early mediator of wound healing known to play an important role in stimulation of collagen production after cellular injury. Little attention has been paid to the role of lactate in flexor tendon wound healing. In this study tendon and tendon sheath were excised from rabbit forepaws. We examined proliferation of tendon sheath fibroblasts, epitenon tenocytes, and endotenon tenocytes; collagen production by each of these 3 cell types; and effects of lactate on cell proliferation and collagen production. Three cell lines, tendon sheath, epitenon, and endotenon, were isolated and cultured. Tendon sheath fibroblasts showed the greatest proliferation. All 3 cell lines produced collagen I, II, and III. Lactate significantly increased collagen production by all 3 cell lines. We show that cells of the tendon sheath, epitenon, and endotenon produce collagen in vitro. Modulation of lactate levels may provide a means to modulate collagen production.
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