eCite Digital Repository

Cell Cycle Arrest of Hematopoietic Cell Lines After Treatment With Ceramide Is Commonly Associated With Retinoblastoma Activation


Connor, CE and Burrows, J and Hearps, AC and Woods, GM and Lowenthal, RM and Ragg, SJ, Cell Cycle Arrest of Hematopoietic Cell Lines After Treatment With Ceramide Is Commonly Associated With Retinoblastoma Activation, Cytometry, 43, (3) pp. 164-169. ISSN 0196-4763 (2001) [Refereed Article]

DOI: doi:10.1002/1097-0320(20010301)43:3<164::AID-CYTO1044>3.0.CO;2-O


Background: Leukaemia cells differ from their normal counterparts in that their ability to properly regulate survival, proliferation, differentiation, and apoptosis is aberrant. Understanding the molecular mechanisms controlling cell proliferation and developing therapeutic strategies to correct nonfunctional regulatory mechanisms are emerging areas of medical research. Ceramide, a metabolite of membrane sphingomyelin hydrolysis, has recently emerged as a key regulator of cellular proliferation, differentiation, and apoptosis in leukaemia cells. Methods: Leukaemia cell lines were treated with a biologically active analogue of ceramide, C 2-ceramide. Cell cycle status was assessed flow cytometrically using propidium iodide. Induction of apoptosis was confirmed by annexin V staining of externalised phosphatidylserine and retinoblastoma activation was determined by Western blotting. Results: C 2-ceramide induced activation of retinoblastoma tumour suppressor protein, G 0/G 1 cell cycle arrest, or apoptosis in leukaemia cell lines. In addition, these effects differed depending upon cell type, thus confirming the pleiotropic nature of the ceramide signalling pathway. Most cells studied responded to exogenous C 2-ceramide by entering growth arrest, evidently resulting from activation of retinoblastoma protein, and by displaying some degree of apoptosis. Conclusions: Taken together, these findings suggest that signalling via ceramide has novel therapeutic applications for treatment of leukaemia. © 2001 Wiley-Liss, Inc.

Item Details

Item Type:Refereed Article
Research Division:Biomedical and Clinical Sciences
Research Group:Cardiovascular medicine and haematology
Research Field:Haematology
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Connor, CE (Mr Charles Connor)
UTAS Author:Burrows, J (Ms Joanna Burrows)
UTAS Author:Hearps, AC (Ms Anna Hearps)
UTAS Author:Woods, GM (Professor Gregory Woods)
UTAS Author:Lowenthal, RM (Professor Ray Lowenthal)
UTAS Author:Ragg, SJ (Dr Scott Ragg)
ID Code:21577
Year Published:2001
Web of Science® Times Cited:8
Deposited By:Pathology
Deposited On:2001-08-01
Last Modified:2002-06-28

Repository Staff Only: item control page