Abstract:
AIMS:To examine the immunohistochemical expression of helicase-like transcription factor (HLTF) in relation to the prognosis of hypopharyngeal (HSCCs) and laryngeal (LSCCs) squamous cell carcinomas, and to characterize the HLTF protein variants expressed in biopsy specimens of head and neck squamous cell carcinoma (HNSCC) as well as the HeLa cell line. METHODS AND RESULTS:HLTF expression was determined by immunohistochemistry on a series of 100 hypopharyngeal (stage IV) and 56 laryngeal SCCs (stages I, II and IV). The HLTF variants were defined using reverse transcriptase-polymerase chain reaction and Western blots in 13 fresh HNSCC biopsies and in HeLa cells. High levels of HLTF expression were associated with rapid recurrence rates in a subgroup of 81 stage IV hypopharyngeal SCCs (with complete follow-up). A 95-kDa HLTF variant truncated at the carboxyl-terminal domain was detected in addition to the 115-kDa full-size protein in HNSCC biopsies, while six variants were observed in HeLa cells. CONCLUSIONS:Our results demonstrate, for the first time, that hypopharyngeal SCCs presenting high levels of HLTF have a worse prognosis. The quantitative determination of HLTF in hypopharyngeal SCCs was an independent prognostic marker alongside tumour node metastasis staging. HNSCCs expressed the truncated HLTF variant lacking the domains involved in DNA repair.
journal_name
Histopathologyjournal_title
Histopathologyauthors
Capouillez A,Debauve G,Decaestecker C,Filleul O,Chevalier D,Mortuaire G,Coppée F,Leroy X,Belayew A,Saussez Sdoi
10.1111/j.1365-2559.2009.03330.xsubject
Has Abstractpub_date
2009-07-01 00:00:00pages
77-90issue
1eissn
0309-0167issn
1365-2559pii
HIS3330journal_volume
55pub_type
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