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Acta Otorrinolaringol
Esp 2002;53:448-454
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EFECTO ANTITUMORAL
DEL GEN SUICIDA HSV-tk Y GANCICLOVIR EN UN MODELO EXPERIMENTAL
DE CARCINOMA EPIDERMOIDE DE CABEZA Y CUELLO
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M.S.BOLEAS AGUIRRE,
S.FERNÁNDEZ GONZÁLEZ, M.A.GALLEGO MADRID,
R.GARCÍA-TAPIA URRUTIA
DEPARTAMENTO DE OTORRINOLARINGOLOGÍA. CLÍNICA
UNIVERSITARIA DE NAVARRA. PAMPLONA.
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RESUMEN

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Introducción:Se
estudió la transfección por adenovectores
y el efecto antitumoral del gen HVS-tk asociado a ganciclovir
(AdCMVtk/GCV)en células KB de carcinoma epidermoide
oral humano,in vitro e in vivo.Material y métodos:
La trasfección por adenovectores se comprobó
al teñir con X-gal cultivos y cortes tumorales
KB tras exponerlos al adenovector AdCMVlacZ. El efecto
antitumoral de AdCMVtk/GCV in vitro se estudió
al comparar la supervivencia entre cultivos expuestos
a AdCMVtk/GCV y a AdCMVlacZ/GCV.Para valorar el efecto
antitumoral in vivo, se comparó el volumen de
necrosis tumoral con respecto al total, entre animales
tratados con AdCMVtk/GCV y con AdCMVlacZ/GCV. Se estudió
la toxicidad hepática y renal. Resultados:In
vitro,la supervivencia con AdCMVtk/GCV es menor que
con AdCMVlacZ/GCV.In vivo,el volumen de necrosis es
mayor con AdCMVtk/GCV que con AdCMVlacZ/GCV. No se constató
toxicidad hepática ni renal.Conclusiones:Las
células KB se transfectan por adenovectores y
son destruidas por AdCMVtk/GCV,in vitro e in vivo (sin
toxicidad en este modelo experimental animal).
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PALABRAS CLAVE
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Genes suicidas.Cáncer
de cabeza y cuello.
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ANTITUMORAL EFFECT
OF HSV-tk SUICIDE GENE ASSOCIATED WITH GANCICLOVIR IN
A EXPERIMENTAL MODEL OF HEAD AND NECK SQUAMOUS CELL
CARCINOMA
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ABSTRACT

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Introduction:We studied
the transfection by adenoviral vectors and the antitumoral
effect of HSV-tk gene associated with ganciclovir (AdCMVtk/GCV)in
KB human oral cavity squamous cell carcinoma,in vitro
and in vivo.Materials and methods: Transfection was
assessed by the X-gal stain.It was used in cell cultures
and tumoral sections previously exposed to adenoviral
vector AdCMVlacZ. In vitro,in order to study the antitumoral
effect of AdCMVtk/GCV, survival of cell cultures exposed
to AdCMVtk/GCV and to AdCMVlacZ/GCV was compared. In
vivo,necrotic volume as a percentage of total tumoral
volume,was compared between AdCMVtk/GCV treated group
and AdCMVlacZ/GCV exposed group.Hepatic and renal toxicities
were assessed.Results:In vitro,survival of cell cultures
treated with AdCMVtk/GCV was less than AdCMVlacZ/GCV
exposed cells.In vivo,necrotic volume was larger in
AdCMVtk/GCV treated group than in AdCMVlacZ/GCV exposed
group. No toxicity was found (hepatic,renal).Conclusions:KB
cells are transfected by adenoviral vectors and are
killed by AdCMVtk/GCV,both in vitro and in vivo (no
toxicity was found in the animal model).
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KEY WORDS
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Suicide genes.Head
and neck cancer.
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