title: [Caspase1 Inhibitor Ac-YVAD-CMK Prevents and Treats the Acute Graft Versus Host Disease in Mice].
abstract: OBJECTIVE
  To explore the effect of Caspase 1 inhibitor Ac-YVAD-CMK on acute graft-versus-host disease (aGVHD) after allogeneic hematopoietic stem cell transplantation(allo-HSCT) and its mechanism.
  
  
  METHODS
  Experiments were divided randomly into 3 groups: allogeneic hematopoietic stem cell transplantation combined with splenic cell infusion group (TS group, n=12), allogeneic hematopoietic stem cell transplantation combined with splenic cell infusion plus injection of low dose Caspase 1 inhibitor group (TS+low dose of C group, n=16) and plus high dose Caspase1 inhibitor (TS+high dose of C group, n=19). The body weight of mice in each group was dynamically detected, and the clinical manifestation of GVHD and score of aGVHD were determined, and the chimerism rate of mice was detected after transplantation for 14 days. Th1, Th2 and Th17 cells in peripheral blood were examined by flow cytometry. Peripheral proinflammatory cytokines IL-1β, IFN-γ, IL-1α and IL-18 were examined by enzyme-linked immunosorbent assay(ELISA). The tissues sections of GVHD target organs (liver, lung, colon and skin) were stained with HE for histopathologic examination and histopathologic score.
  
  
  RESULTS
  Ac-YVAD-CMK could alleviate murine aGVHD and pathological injury, decreare the incidence and severity of aGVHD in recipient mice. The detection of Th cell subsets in peripheral blood by flow cytometry showed that compared with TS group, the Th1 cell ratio in TS+low dose of C and TS+high dose of C groups was significantly reduced (P<0.05), while the Th2 and Th17 cell ratio was significantly enhanced (P<0.05) in TS+low dose of high dose of C groups. The detection of peripheral inflamematory cytokines by ELISA demonstrated that the inflammatory cytokines including IL-1β,IFN-γ,IL-18 and IL-1α were reduced significantly (P<0.05).
  
  
  CONCLUSIONS
  Ac-YVAD-CMK can improve aGVHD by inhibiting Caspase 1 and reducing the release of some inflammatory cytokines, thereby alleviated the aGVHD pathological damage.
authors.affiliation: Institute of Hematology, Xuzhou Medical University,Xuzhou 221000, Jiangsu Province, China.
authors.forename: Qing-Ling
authors.initials: QL
authors.lastname: Kong
authors.affiliation: Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, Jiangsu Province, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: Institute of Hematology, Xuzhou Medical University,Xuzhou 221000, Jiangsu Province, China.
authors.forename: Gui-Zhen
authors.initials: GZ
authors.lastname: Sun
authors.affiliation: Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, Jiangsu Province, China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Cao
authors.affiliation: Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, Jiangsu Province, China.
authors.forename: Hai
authors.initials: H
authors.lastname: Cheng
authors.affiliation: Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, Jiangsu Province, China.
authors.forename: Kun-Ming
authors.initials: KM
authors.lastname: Qi
authors.affiliation: Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, Jiangsu Province, China.
authors.forename: Xiu-Ying
authors.initials: XY
authors.lastname: Pan
authors.affiliation: Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, Jiangsu Province, China.
authors.forename: Zhen-Yu
authors.initials: ZY
authors.lastname: Li
authors.affiliation: Institute of Hematology, Xuzhou Medical University,Xuzhou 221000, Jiangsu Province, China.
authors.forename: Ling-Yu
authors.initials: LY
authors.lastname: Zeng
authors.affiliation: Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, Jiangsu Province, China. E-mail:lihmd＠163.com.
authors.forename: Kai-Lin
authors.initials: KL
authors.lastname: Xu
mesh_terms: D000208:Acute Disease; D000590:Amino Acid Chloromethyl Ketones / Q000494:pharmacology*; D000818:Animals; D006086:Graft vs Host Disease / Q000188:drug therapy / Q000517:prevention & control; D018380:Hematopoietic Stem Cell Transplantation; D051379:Mice; D008810:Mice, Inbred C57BL; D011897:Random Allocation; D014184:Transplantation, Homologous
chemical_list: D000590:Amino Acid Chloromethyl Ketones; C098738:N-acetyl-tyrosyl-valyl-alanyl-aspartyl chloromethyl ketone