title: [Progress in the study on the molecules in CD28 family].
abstract: CD28 family consists of CD28, ICOS, CTLA-4 and PD-1 molecules. The former two are activation receptors and the later two are inhibition receptors. They produce co-stimulatory signals combining with the relevant molecules in B7 family, which plays important role in T cell activation and homeostasis among T subsets. Although the mechanism of signaling by CD28 and CTLA-4 has been well studied, many questions still remain to be answered. Further investigations are required for substantiating the dual-signaling model.
authors.affiliation: Department of 98 Clinical Medicine, PUMC, Beijing 100005, China.
authors.forename: Yun-lu
authors.initials: YL
authors.lastname: Feng
authors.forename: Li-ping
authors.initials: LP
authors.lastname: Zhu
authors.forename: Wei
authors.initials: W
authors.lastname: He
mesh_terms: D000818:Animals; D015703:Antigens, CD; D000943:Antigens, Differentiation / Q000276:immunology*; D018106:CD28 Antigens / Q000276:immunology*; D060908:CTLA-4 Antigen; D006801:Humans; D007141:Immunoglobulin Fc Fragments / Q000276:immunology; D015398:Signal Transduction
chemical_list: D015703:Antigens, CD; D000943:Antigens, Differentiation; D018106:CD28 Antigens; D060908:CTLA-4 Antigen; C556706:CTLA4 protein, human; D007141:Immunoglobulin Fc Fragments