title: MSCs with ACE II gene affect apoptosis pathway of acute lung injury induced by bleomycin.
abstract: OBJECTIVE
  The aim of this study was to evaluate the effect and related mechanisms of Mesenchymal stem cells (MSCs) and Angiotensin converting enzyme II (ACE II) on acute lung injury (ALI).
  
  
  METHODS
  MSCs were separated from umbilical cord cells, and the changes of phenotype before and after ACE II silence were observed using Flow Cytometer. ALI model was induced by 10 mg/mL bleomycin in 60 Balb/c mice, and the rest 8 mice were regarded as the baseline group. The mice were randomly divided into four groups (n = 15): control, ACE II, stem, and stem + ACE II. The apoptotic index (AI) was calculated using TUNEL, and the detection of protein and mRNA of Bax, Bak and p53, Bcl-2, Grp78, CHOP and Caspase 12 were used by western-blot and RT-PCR, respectively.
  
  
  RESULTS
  The umbilical cord cells differentiated into stable MSCs about 14 days, and ACE II transfection reached a peak at the 5th day after transfection. ACE II silence did not affect the phenotype of MSCs. All the proteins and mRNAs expression except Bcl-2 in the stem and stem + ACE II were significantly lower than those in control from 8 h (p < 0.05, p < 0.01), while Bcl-2 exhibited an opposite trend. Stem + ACE II performed a better effect than single stem in most indexes, including AI (p < 0.05, p < 0.01).
  
  
  CONCLUSIONS
  The co-administration of MSCs and ACE II can significantly suppress apoptosis in ALI mice, and may be an effective clinical treatment for ALI.
authors.affiliation: 1Department of Thoracic Surgery, First People's Hospital Affiliated to Shanghai Jiaotong University , Shanghai , PR China.
authors.forename: Xiaomiao
authors.initials: X
authors.lastname: Zhang
authors.forename: Fengying
authors.initials: F
authors.lastname: Gao
authors.forename: Qian
authors.initials: Q
authors.lastname: Li
authors.forename: Zhixia
authors.initials: Z
authors.lastname: Dong
authors.forename: Bo
authors.initials: B
authors.lastname: Sun
authors.forename: Lili
authors.initials: L
authors.lastname: Hou
authors.forename: Zhuozhe
authors.initials: Z
authors.lastname: Li
authors.forename: Zhenwei
authors.initials: Z
authors.lastname: Liu
mesh_terms: D055371:Acute Lung Injury / Q000139:chemically induced / Q000628:therapy*; D000085962:Angiotensin-Converting Enzyme 2; D000818:Animals; D017209:Apoptosis; D001761:Bleomycin; D002478:Cells, Cultured; D000091342:Endoplasmic Reticulum Chaperone BiP; D059865:Endoplasmic Reticulum Stress; D015870:Gene Expression; D015316:Genetic Therapy; D006801:Humans; D020287:In Situ Nick-End Labeling; D045164:Mesenchymal Stem Cell Transplantation; D059630:Mesenchymal Stem Cells / Q000166:cytology; D008807:Mice, Inbred BALB C; D007703:Peptidyl-Dipeptidase A / Q000235:genetics / Q000627:therapeutic use*; D010641:Phenotype; D011897:Random Allocation; D014162:Transfection
chemical_list: D000091342:Endoplasmic Reticulum Chaperone BiP; C000717247:HSPA5 protein, human; C000717248:Hspa5 protein, mouse; D001761:Bleomycin; D007703:Peptidyl-Dipeptidase A; C000705307:ACE2 protein, human; C000705328:Ace2 protein, mouse; D000085962:Angiotensin-Converting Enzyme 2
keywords: ACE II; MSCs; acute lung injury; cellular apoptosis; therapy pathway