title: [Study of labeling human periodontal ligament stem cells with enhanced green fluorescent protein by lentivirus vector infection].
abstract: OBJECTIVE
  The aim of this study is to optimize conditions for labeling human periodontal ligament stem cells (PDLSCs) using enhanced green fluorescent protein (eGFP) infected by lentivirus vector and to obtain PDLSCs with high stable expressed eGFP.
  
  
  METHODS
  PDLSCs were transfected with eGFP by lentivirus vector for 48 h via different multiplicity of infection (MOI) (25, 50, 100, 200 and 400) and the infection efficiency were analyzed by both fluorescent microscope and flow cytometry. The proliferation rate of infected PDLSCs was evaluated by MTT. The infected PDLSCs were further for detection of pluripotent, differentiation ability and alkaline phosphatase (ALP) expression ability.
  
  
  RESULTS
  The infection efficiency for each group were 44.7%, 60.9%, 71.7%, 85.8% and 86.9% respectively. Proliferation of PDLSCs was not affected when MOI was below 200; however, at MOI 400, the proliferation ability was affected compared with control group. The pluripotent and ALP abilities of PDLSCs were not changed by the infection.
  
  
  CONCLUSIONS
  Infection for 48 h at MOI 200 is optimal for labeling PDLSCs with eGFP using lentivirus vector, and the proliferation and differentiation abilities of PDLSCs are not affected obviously.
authors.affiliation: Dental Implantation Center, School of Stomatology, Shandong University, Shandong Provincial Key Laboratory of Oral Biomedicine, Jinan 250012, China.
authors.forename: Baoqi
authors.initials: B
authors.lastname: Jiang
authors.forename: Yong
authors.initials: Y
authors.lastname: Wen
authors.forename: Haiyun
authors.initials: H
authors.lastname: Huang
authors.forename: Jun
authors.initials: J
authors.lastname: Cui
authors.forename: Jin
authors.initials: J
authors.lastname: Liang
authors.forename: Xiaoni
authors.initials: X
authors.lastname: Ma
authors.forename: Jing
authors.initials: J
authors.lastname: Lan
authors.forename: Xin
authors.initials: X
authors.lastname: Xu
mesh_terms: D000469:Alkaline Phosphatase; D002454:Cell Differentiation; D005822:Genetic Vectors; D049452:Green Fluorescent Proteins; D006801:Humans; D016086:Lentivirus; D010513:Periodontal Ligament; D013234:Stem Cells; D014162:Transfection
chemical_list: C485184:enhanced green fluorescent protein; D049452:Green Fluorescent Proteins; D000469:Alkaline Phosphatase