����ʡ����ҽѧԺ��һ����ҽԺƤ���� ����ʡ����ҽѧԺ��һ����ҽԺƤ����

HLA��������Ϊ���ӵĻ����̬���Ŵ�ϵͳ����������Ģ�����Ӻ͢��������Ҫ����Կ�ԭ�ĵĴ���������Ƥ�����ķ��������в������Ŀǰ��Ϊ���ǻ���������������������һ��δ֪��ԭ�ij�����Ӧ��������Կ�ԭ������Ӧ����ҪHLA�IJ��롣��ˣ�HLA����ı���������Ƥ�����ķ���������ء�

HLA is known to be the most polymorphic genetic system in human. HLA class��and ��molecules coded by this system mainly take part in the processing of peptide antigens. On one hand, the mechanisms of photosensitive dermatosis remain unclear, and are presumed to be a hypersensitivity response to unknown antigen associated with the radiation of ultraviolet ray. On the other hand, HLA is required for all the immune response. So, the pathogenesis of photosensitive dermatosis is closely related to the expression of HLA.