Document Detail

8-prenylnaringenin and tamoxifen inhibit the shedding of irradiated epithelial cells and increase the latency period of radiation-induced oral mucositis : Cell culture and murine model.
MedLine Citation:
PMID:  25432325     Owner:  NLM     Status:  Publisher    
PURPOSE: The major component in the pathogenesis of oral radiation-induced mucositis is progressive epithelial hypoplasia and eventual ulceration. Irradiation inhibits cell proliferation, while cell loss at the surface continues. We conceived to slow down this desquamation by increasing intercellular adhesion, regulated by the E-cadherin/catenin complex. We investigated if 8-prenylnaringenin (8-PN) or tamoxifen (TAM) decrease the shedding of irradiated human buccal epithelial cells in vitro and thus delay the ulcerative phase of radiation-induced mucositis in vivo.
MATERIALS AND METHODS: In vitro, aggregates of buccal epithelial cells were irradiated and cultured in suspension for 11 days. 8-PN or TAM were investigated regarding their effect on cell shedding. In vivo, the lower tongue surface of mice was irradiated with graded single doses of 25 kV X-rays. The incidence, latency, and duration of the resulting mucosal ulcerations were analyzed after topical treatment with 8-PN, TAM or solvent.
RESULTS: 8-PN or TAM prevented the volume reduction of the irradiated cell aggregates during the incubation period. This was the result of a higher residual cell number in the treated versus the untreated irradiated aggregates. In vivo, topical treatment with 8-PN or TAM significantly increased the latency of mucositis from 10.9 to 12.1 and 12.4 days respectively, while the ulcer incidence was unchanged.
CONCLUSION: 8-PN and TAM prevent volume reduction of irradiated cell aggregates in suspension culture. In the tongues of mice, these compounds increase the latency period. This suggests a role for these compounds for the amelioration of radiation-induced mucositis in the treatment of head and neck tumors.
Tine De Ryck; Annouchka Van Impe; Barbara W Vanhoecke; Arne Heyerick; Luc Vakaet; Wilfried De Neve; Doreen Müller; Margret Schmidt; Wolfgang Dörr; Marc E Bracke
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-29
Journal Detail:
Title:  Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al]     Volume:  -     ISSN:  1439-099X     ISO Abbreviation:  Strahlenther Onkol     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-11-29     Completed Date:  -     Revised Date:  2014-11-30    
Medline Journal Info:
Nlm Unique ID:  8603469     Medline TA:  Strahlenther Onkol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Vernacular Title:
8-Prenylnaringenin und Tamoxifen hemmen die Abschilferung bestrahlter Epithelzellen und verlängern die Latenzzeit der radiogenen oralen Mukositis : Zellkultur und Mausmodell.
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