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Division of Experimental Oncology A, E and Anatomical Pathology, Istituto Nazionale Tumori, 20133 Milan, Italy [G. S., L. M., E. T., C. G., S. T., L. S., M. A. P., S. P.]; Division of Thoracic Surgery, European Institute of Oncology, 20141 Milan, Italy [U. P.]; Department of Pathology, University College of London, London, United Kingdom [F. P.]; and the Kimmel Cancer Center, Jefferson Medical College, Philadelphia, Pennsylvania 19107 [K. H., C. M. C.]
We previously cloned and characterized the tumor suppressor gene FHIT (fragile histidine triad) at chromosome 3p14.2 and found that this gene is altered by deletions in human tumors, including lung cancer. To assess the frequency and specificity of inactivation and its relevance in a clinical setting, we have produced antibodies against the Fhit protein and studied its expression in a series of non-small cell lung cancers and normal bronchial mucosa and a spectrum of preinvasive lesions by immunohistochemistry.
The data indicate that the loss of Fhit protein is the most frequent alteration in non-small cell lung cancer (73%) and precancerous lesions (93%), is significantly higher in the tumors of smokers (75%) than in those of nonsmokers (39%; P < 0.0005), and is an independent and more frequent event than p53 overexpression in tumors and precancerous lesions (73 versus 46%). The percentage of cases lacking Fhit expression was higher in the squamous type compared to adenocarcinoma (87 versus 57%; P < 0.00001), whereas other histotypes (large cell, mucoepidermal) showed an intermediate value (69%).
Loss of Fhit expression in a very high percentage of primary lung carcinomas and precancerous lesions supports the notion that FHIT alterations play an important role in the growth control of bronchial cells. FHIT inactivation is particularly important in squamous cell carcinomas that are often associated with precursor dysplastic lesions. The overall high frequency and precocity of Fhit loss in lung carcinogenesis and the development of the presently described immunohistochemical approach suggest a potential use of this gene in the early detection of lung cancer and in chemopreventive studies as an intermediate biomarker.
1 Supported in part by the Associazione and Federazione Italiana per la Ricerca sul Cancro (AIRC/FIRC) and the Special Project of the Consiglio Nazionale delle Ricerche Applicazioni Cliniche della Ricerca Oncologica. C. M. C. and K. H. were supported by NIH Grants CA56336, CA21124, and CA39860.
2 To whom requests for reprints should be addressed, at Kimmel Cancer Center, Jefferson Medical College, Thomas Jefferson University, 233 South 10th Street, Philadelphia, PA 19107. Phone: (215) 503-4645; Fax: (215) 923-3528; E-mail: C_Croce@lac.jci.tju.edu.
Received 9/ 9/98. Accepted 10/ 1/98.
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M. Mori, K. Mimori, T. Shiraishi, H. Alder, H. Inoue, Y. Tanaka, K. Sugimachi, K. Huebner, and C. M. Croce Altered Expression of Fhit in Carcinoma and Precarcinomatous Lesions of the Esophagus Cancer Res., March 1, 2000; 60(5): 1177 - 1182. [Abstract] [Full Text] |
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A. Draganescu, S. C. Hodawadekar, K. R. Gee, and C. Brenner Fhit-nucleotide Specificity Probed with Novel Fluorescent and Fluorogenic Substrates J. Biol. Chem., February 18, 2000; 275(7): 4555 - 4560. [Abstract] [Full Text] [PDF] |
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M. J. Birrer, D. Hendricks, J. Farley, M. J. Sundborg, T. Bonome, M. J. Walts, and J. Geradts Abnormal Fhit Expression in Malignant and Premalignant Lesions of the Cervix Cancer Res., October 1, 1999; 59(20): 5270 - 5274. [Abstract] [Full Text] [PDF] |
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L. Sard, P. Accornero, S. Tornielli, D. Delia, G. Bunone, M. Campiglio, M. P. Colombo, M. Gramegna, C. M. Croce, M. A. Pierotti, et al. The tumor-suppressor gene FHIT is involved in the regulation of apoptosis and in cell cycle control PNAS, July 20, 1999; 96(15): 8489 - 8492. [Abstract] [Full Text] [PDF] |
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C. M. Croce, G. Sozzi, and K. Huebner Role of FHIT in Human Cancer J. Clin. Oncol., May 1, 1999; 17(5): 1618 - 1618. [Abstract] [Full Text] [PDF] |
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L. Y. Y. Fong, V. Fidanza, N. Zanesi, L. F. Lock, L. D. Siracusa, R. Mancini, Z. Siprashvili, M. Ottey, S. E. Martin, T. Druck, et al. Muir-Torre-like syndrome in Fhit-deficient mice PNAS, April 25, 2000; 97(9): 4742 - 4747. [Abstract] [Full Text] [PDF] |
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N. Zanesi, V. Fidanza, L. Y. Fong, R. Mancini, T. Druck, M. Valtieri, T. Rudiger, P. A. McCue, C. M. Croce, and K. Huebner The tumor spectrum in FHIT-deficient mice PNAS, August 28, 2001; 98(18): 10250 - 10255. [Abstract] [Full Text] [PDF] |
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