TNF and graft versus host disease: MLCK; myosin light chain kinase, PAMPs; pathogen-associated molecular patterns, LPS; lipopolysaccharide, DAMPs; damage-associated molecular patterns, APC; antigen-presenting cell, IFN-γ; interferon gamma, TNF-α; tumor necrosis factor alpha, IL-5; interleukin 5, GVHD; graft-versus-host disease.