Document Detail

Induction of cisplatinum sensitivity without alteration in radiation sensitivity by fractionated radiation treatment of a human laryngeal squamous cell carcinoma cell line.
MedLine Citation:
PMID:  7790254     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To determine if fractionated radiation treatment can alter cisplatinum sensitivity of a human laryngeal squamous carcinoma cell line. METHODS AND MATERIALS: Human squamous carcinoma cells, both previously untreated, as well as survivors of fractionated radiation therapy, were tested in vitro for their sensitivity to gamma radiation and cisplatinum. Fractionated gamma radiation was delivered in 14 or 10 daily fractions of 2 Gy. The cell line, cSCC-20, was derived from an untreated primary human laryngeal carcinoma. RESULTS: The human laryngeal squamous cell carcinoma cell line, cSCC-20, was demonstrated to have heterogeneous subpopulations with respect to cisplatinum sensitivity. No variation in radiation sensitivity was seen among subpopulations of varying cisplatinum sensitivity. The cells were relatively radioresistant (Do = 2.5 Gy). Fractionated radiation treatments of the parent cell line (14 fractions, 14 days, 2 Gy/fraction) or a cisplatinum sensitive subline (10 fractions, 12 days, 2 Gy/fraction) induced cisplatinum sensitivity (factor of 1.3 to 1.4) in the surviving cells. CONCLUSION: Fractionated radiation treatment of human squamous carcinoma cells in vitro induced sensitivity to cisplatinum without concomitant alteration in radiation sensitivity.
J L Redpath; E C Hyden; C Sun
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of radiation oncology, biology, physics     Volume:  32     ISSN:  0360-3016     ISO Abbreviation:  Int. J. Radiat. Oncol. Biol. Phys.     Publication Date:  1995 Jun 
Date Detail:
Created Date:  1995-07-21     Completed Date:  1995-07-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7603616     Medline TA:  Int J Radiat Oncol Biol Phys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  681-5     Citation Subset:  IM    
Department of Radiation Oncology, University of California Irvine 92717, USA.
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MeSH Terms
Carcinoma, Squamous Cell / drug therapy*,  pathology,  radiotherapy*
Cell Survival
Cisplatin / pharmacology*
Drug Resistance / radiation effects
Laryngeal Neoplasms / drug therapy*,  pathology,  radiotherapy*
Tumor Cells, Cultured
Reg. No./Substance:

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