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Early expression of the Helicase-Like Transcription Factor (HLTF/SMARCA3) in an experimental model of estrogen-induced renal carcinogenesis
Debauve, Gaël; Nonclercq, Denis; Ribaucour, Fabrice et al.
2006In Molecular Cancer, 5, p. 23-34
Peer reviewed
 

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Abstract :
[en] BACKGROUND: The Helicase-Like Transcription Factor (HLTF/SMARCA3) belongs to the family of SWI/SNF proteins that use the energy of ATP hydrolysis to remodel chromatin in a variety of cellular processes. Several SWI/SNF genes are disrupted in cancer, suggesting a role of tumor suppressor. Similarly, the HLTF gene was recently found to be inactivated by hypermethylation in a number of advanced colon and gastric tumors. However, other evidences indicated a 20-fold HLTF overexpression in cell lines derived from various neoplasms (ovary, breast, cervix, kidney...). RESULTS: In the present study, we investigated HLTF expression by immunohistochemistry in a model of kidney tumors induced by continuous administration of diethylstilbestrol to male Syrian golden hamsters. A strong labeling was already detected in small tumor buds, making HLTF an early cancer marker in this model. Although every cell stained for HLTF at this early stage, the number of HLTF-positive cells decreased to 10% with cancer progression, and these positive cells were dispersed in the tumor mass. HLTF expression was conserved in the HKT-1097 cell line established from kidney tumors, but again only 10% of positive cells were found in xenografts produced by HKT-1097 cells in nude mice. CONCLUSION: In conclusion, our data suggest that HLTF gene activation is linked to initial steps of carcinogenesis in this model and should be investigated in early stages of other neoplasms.
Disciplines :
Immunology & infectious disease
Oncology
Biochemistry, biophysics & molecular biology
Biotechnology
Author, co-author :
Debauve, Gaël
Nonclercq, Denis ;  Université de Mons > Faculté de Médecine et de Pharmacie > Service d'Histologie
Ribaucour, Fabrice
Wiedig, Murielle
Gerbaux, Cécile
Leo, Oberdan
Laurent, Guy 
Journé, Fabrice
Belayew, Alexandra ;  Université de Mons > Faculté de Médecine et de Pharmacie > Biochimie métabolique et moléculaire
Toubeau, Gérard
Language :
English
Title :
Early expression of the Helicase-Like Transcription Factor (HLTF/SMARCA3) in an experimental model of estrogen-induced renal carcinogenesis
Publication date :
08 June 2006
Journal title :
Molecular Cancer
Publisher :
BioMed Central, United Kingdom
Volume :
5
Pages :
23-34
Peer reviewed :
Peer reviewed
Research unit :
M118 - Histologie
M122 - Biochimie métabolique et moléculaire
Research institute :
R550 - Institut des Sciences et Technologies de la Santé
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