Objective:To investigate the electromyography activities of the facial and neck muscles during mandibular movement in children with high-angle.Methods:A computer-integrated BioEMG Ⅱ diagnostic system was used to synchronously record the electromyography activities of temporal anterior(TA), masseter muscle(MM), sternocleidomastoid(SCM) and digastric anterior(DA) muscles during mandibular movement in 14 children with high-angle and 16 children with normal-angle.Results:Muscular activity of TA, DA and SCM in children with high-angle was significantly weaker than that in those with normal-angle in the rest position(P

Objective:To study the mechanisms of immune suppression mediated by Gr-1+CDllb+ myeloid derived suppressor cells (Gr-1~+CDllb~+MDSC)from tumor-bearing mice.Methods:Gr-1~+CDllb~+MDSC recruited into spleen and bone marrow of tumor-bearing mice were purified by Percoll,and suppression mediated by MDSC on T cell proliferation from spleen of naive mice was detected by flow cytometry with CSFE and FTTC-anti CD3 staining,and NO,ROS,IL-10 and TGF-β in the supematant of MDSC were detected by Griess and ELISA.Results:There were much more Gr-1~+CDllb~+MDSCs in spleen and bone marrow from tumor-bearing mouse than those of naive mouse,and suppression on T cell proliferation mediated by MDSC from tumor beating mouse was significantly increased,and there were much more NO,ROS,IL-10 and TGF-βin the supematant of these MDSC than that from naive mouse.Conclusion:MDSC from tumor-bearing mice secreted hish level of NO,ROS,IL-10 and TGF-βto induce immune suppression,and inhibite the proliferation of T cells.