The human myotubularin-related protein suppresses the growth of lung carcinoma cells.
Herein, we report that the human myotubularin-related protein (KIAA0371) induced growth suppression of lung cancer cells. Colony formation assays demonstrated that the exogenous expression of the human myotubularin-related gene induced a significant growth inhibition of H1299 cells in which the expression of the human myotubularin-related gene was undetectable. Colony formation of these cells was reduced by 39% after transfection with this gene, as compared with the control vector. Cells stably transfected with this gene showed a reduction in growth of 48% compared with those cells transfected with the empty vector. We also showed that this negative regulation of the myotubularin-related protein is correlated with cell-cycle arrest at G1. In addition, we found that the cyclin-dependent kinase inhibitor, p27, is induced by increased expression of the human myotubularin-related gene. These results suggest that the human myotubularin-related protein can negatively regulate the growth of lung cancer cells.
Korea University Center Institute, Korea University College of Medicine, Seoul 136-705, Korea.
Young Do
YD
Yoo
Sun Mi
SM
Cho
Jun Suk
JS
Kim
Yoon Soo
YS
Chang
Chul Min
CM
Ahn
Hyung Jung
HJ
Kim
D015152:Blotting, Northern; D002453:Cell Cycle; D018797:Cell Cycle Proteins / Q000378:metabolism; D002454:Cell Differentiation; D002455:Cell Division; D045744:Cell Line, Tumor; D002469:Cell Separation; D050760:Cyclin-Dependent Kinase Inhibitor p27; D004247:DNA / Q000737:chemistry; D018076:DNA, Complementary / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005434:Flow Cytometry; D016193:G1 Phase; D015316:Genetic Therapy / Q000379:methods*; D005822:Genetic Vectors; D006801:Humans; D015151:Immunoblotting; D008175:Lung Neoplasms / Q000378:metabolism* / Q000628:therapy*; D017027:Protein Tyrosine Phosphatases / Q000235:genetics / Q000502:physiology*; D054558:Protein Tyrosine Phosphatases, Non-Receptor; D014162:Transfection; D016896:Treatment Outcome; D025521:Tumor Suppressor Proteins / Q000378:metabolism
D018797:Cell Cycle Proteins; D018076:DNA, Complementary; D025521:Tumor Suppressor Proteins; D050760:Cyclin-Dependent Kinase Inhibitor p27; D004247:DNA; C116467:MTMR1 protein, human; D017027:Protein Tyrosine Phosphatases; D054558:Protein Tyrosine Phosphatases, Non-Receptor