title: [Ad-NK4 Enhances the Chemosensitivity of Human Multiple Myeloma RPMI 8226 Cells to Bortezomib].
abstract: OBJECTIVE
  To investigate if Ad-NK4 can enhance the chemosensitivity of human multiple myeloma RPMI 8226 cells to bortezomib(BOR).
  
  
  METHODS
  The cell-matrix adhesion test and PRMI 8226 cell-ECV 304 cell adhesion test were used to analyze the effect of Ad-NK4 on adhesion of RPMI 8226 cells; Western blot was used to detect the expression changes of adhesion and invasion-associated proteins MMP2, MMP3, MMP7 and VEGF; MTT assay was used to detect the effect of Ad-NK4 on proliferation of RPMI 8226 cells; the flow cytometry with PI staining was used to detect the effect of Ad-NK4 on cell apoptosis; the expression of cleaved caspase-3, BAX and BCL-2 was assayed by Western blot.
  
  
  RESULTS
  These 2 adhesion assays indicated that Ad-NK4 significantly inhibited the adhesion of human multiple myeloma RPMI 8226 cells. In addition, Erk and JAK/STAT pathway may be involved in the process. The expression level of MMP-2, MMP-3 and VEGF were decreased in Ad-NK4 group, compared with untreated or Ad-GFP group (P<0.05). However, the expression of MMP-7 protein in Ad-NK4 group was not significantly different from untreated or Ad-GFP group (P>0.05). The inhibitory rates of the proliferation in cells treatedly Ad-NK4 combined with BOR was significantly higher than that with BOR or Ad-NK4 alone. Similarly, Western blot indicated that the level of cleaved caspase-3 and BAX in cells treated with Ad-NK4 combined with BOR was significantly higher than BOR or Ad-NK4 alone, but BCL-2 protein expression was significantly lower. Meanwhile, the ratio of BAX/BCL-2 was increased.
  
  
  CONCLUSIONS
  Ad-NK4 can enhance the chemosensitivity of human multiple myeloma RPMI 8226 cells to BOR,which is associated with increasing of both BAX/BCL-2 ratio and Caspase-3 activation.
authors.affiliation: Department of Hematology & Rheumatology, The Third Affiliated Hospital of Fujian Medical University,Fuzhou 350005, Fujian Province, China.
authors.forename: Wen-Zhong
authors.initials: WZ
authors.lastname: Que
authors.affiliation: Department of Hematology & Rheumatology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, Fujian Province, China. E-mail:drjunminchen@hotmail.com.
authors.forename: Jun-Min
authors.initials: JM
authors.lastname: Chen
mesh_terms: D017209:Apoptosis; D000069286:Bortezomib; D053148:Caspase 3; D045744:Cell Line, Tumor; D006801:Humans; D009101:Multiple Myeloma
chemical_list: D000069286:Bortezomib; C505407:CASP3 protein, human; D053148:Caspase 3