Objective: To study the role of serum Monoamine oxidase (MAO) in Lichen planus(LP). Methods: 82 cases of
Lichen planus patients and 35 healthy controls were selected in the investigation. The total serum MAO levels were
measured. Results: The levels of serum MAO in Lichen planus patients were significantly higher than those in healthy
controls (P<0.01). The severity of Lichen planus was not correlated with serum MAO levels (r =0.4873, t=0.73, p>0.05).
Conclusion: According to the findings, there might be a coincidence of MAO and lichen planus. However, further studies
are required to clarify the immunological mechanisms which are responsible for MAO synthesis during immunoreaction.
Keywords: Lichen planus, measurement, mechanism, monoamine oxidase, serum.
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