Elucidation of the junctional epithelium destruction mechanism wasbased cell adhesion molecule destruction of MMPs

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LPS was applied daily onto the palatal gingival sulcus in rat. In the immunized group, attachment loss was observed on day 10. On day 20, bone resorption was also observed. In the non-immunized group, there was no attachment loss and bone resorption on day 10. In the immunized group, on day 10, C1qB was observed in the junctional epithelium and adjacent connective tissue. The presence of C1qB suggests that the formation of immune complexes is involved in this destruction.