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Titolo:
Expression of telomerase components in oral keratinocytes and squamous cell carcinomas
Autore:
Fujimoto, R; Kamata, N; Yokoyama, K; Ueda, N; Satomura, K; Hayashi, E; Nagayama, M;
Indirizzi:
Univ Tokushima, Sch Dent, Dept Oral & Maxillofacial Surg 1, Tokushima 7708504, Japan Univ Tokushima Tokushima Japan 7708504 Surg 1, Tokushima 7708504, Japan
Titolo Testata:
ORAL ONCOLOGY
fascicolo: 2, volume: 37, anno: 2001,
pagine: 132 - 140
SICI:
1368-8375(200102)37:2<132:EOTCIO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAMMALIAN TELOMERASE; CATALYTIC SUBUNIT; RNA COMPONENT; CANCER; PROTEIN; LESIONS; GROWTH; TUMOR; GENE; IMMORTALIZATION;
Keywords:
telomerase; hTERT; telomeric repeat amplification protocol (TRAP) assay; in situ hybridization (ISH); squamous cell carcinoma;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Kamata, N Univ Tokushima, Sch Dent, Dept Oral & Maxillofacial Surg 1, 3-18-15 Kuramoto Cho, Tokushima 7708504, Japan Univ Tokushima 3-18-15 Kuramoto Cho Tokushima Japan 7708504 pan
Citazione:
R. Fujimoto et al., "Expression of telomerase components in oral keratinocytes and squamous cell carcinomas", ORAL ONCOL, 37(2), 2001, pp. 132-140

Abstract

Telomerase activity was measured using a telomeric repeat amplification protocol (TRAP), and expressions of the telomerase components, telomerase associated protein 1 (hTEP1), human telomerase RNA component (hTR), and human telomerase reverse transcriptase (hTERT) were measured by reverse transcriptase-polymerase chain reaction (RT-PCR) in cultured normal oral keratinocytes and oral squamous cell carcinoma (SCC) cells. Telomerase localization was analyzed by in situ hybridization (ISH) in normal, precancerous and cancerous oral tissues. There was a strong correlation of telomerase activity with the expression levels of hTERT but not with hTEP1 or hTR mRNA in the cultured cells. Not only hTEP1 and hTR but also hTERT expression were detectedin the basal cells of normal oral mucosa, and the cells expressing these mRNAs were also seen in the upper layer of leukoplakia of gingiva, and a heterogeneous pattern of expression was observed in the oral SCC tissues. These results indicate that there are at least two steps in the increase of telomerase activity during carcinogenesis in oral squamous cells; a change in distribution of cells expressing these telomerase components and the over-expression of hTERT gene in individual cells. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 02:06:42