Petrak J, Myslivcova D, Man P, Cmejlova J, Cmejla R, Vyoral D. Proteomic analysis of erythroid differentiation induced by hexamethylene bisacetamide in murine erythroleukemia cells.
Exp Hematol 2007;
35:193-202. [PMID:
17258068 DOI:
10.1016/j.exphem.2006.10.007]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2006] [Revised: 08/25/2006] [Accepted: 10/10/2006] [Indexed: 11/26/2022]
Abstract
OBJECTIVE
Murine erythroleukemia (MEL) cells are transformed erythroid precursors that are arrested in an immature and proliferating state. These leukemic cells can be grown in cell cultures and induced to terminal erythroid differentiation by a treatment with a specific chemical inducer such as N,N'-hexamethylene bisacetamide. MEL cells then re-enter their original erythroid program and differentiate along the erythroid pathway into non-dividing hemoglobin-rich cells resembling orthochromatophilic normoblasts. To deepen our understanding of the molecular mechanisms underlying and erythroid differentiation and leukemia we monitored changes in protein expression in differentiating MEL cells.
METHODS
In our effort to find new candidate proteins involved in the differentiation of MEL cells, we embraced a proteomic approach. Employing two-dimensional (2D) electrophoresis combined with mass spectrometry, we compared protein expression in non-induced MEL cells with MEL cells exposed to N,N'-hexamethylene bisacetamide for 48 h.
RESULTS
From 700 proteins spots observed, 31 proteins were differentially expressed. We successfully identified 27 of the differentially expressed molecules by mass spectrometry (MALDI-MS).
CONCLUSION
In addition to proteins involved in heme biosynthesis, protein metabolism, stress defense and cytoskeletal organization, we identified 3 proteins engaged in regulation of cellular trafficking and 7 proteins important for regulation of gene expression and cell cycle progression including 3 components of chromatin remodeling complexes. Many of the identified molecules are associated with erythroid differentiation or leukemia for the first time. To our knowledge, this is the first study applying a modern proteomic approach to the direct analysis of erythroid differentiation of leukemic cells.
Collapse