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Immunohistochemical expression of VEGFR1 in non small cell lung carcinomas: Lower VEGFR1 expression is asociated with squamous cell carcinoma subtype and high SUV max values in 18F-FDG PET
Expresión inmunohistórica de VEGFR1 en carcinomas de pulmón de células no pequeñas: la expresión inferior de VEGFR1 se asocia con el subtipo de carcinoma de células esamosas y los valores máximos de suv en pet de 18F-FDG
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M.C. Pombo Pasína,
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MACarmen.pombo.pasin@sergas.es

Corresponding author.
, V. Pubul Nuñeza, L. García Bernardoa, F. Gude Sampedrob, I. Abdulkader-Nallibc, A. Ruibal Morella,d,e
a Department of Nuclear Medicine, Complejo Hospitalario Universitario de Santiago de Compostela, Spain
b Clinical Epidemiology Unit, Complejo Hospitalario Universitario de Santiago de Compostela, Spain
c Department of Pathology, Complejo Hospitalario Universitario de Santiago de Compostela. Spain
d Molecular Imaging Group. USC- IDIS. University of Santiago de Compostela, Spain
e Fundación Tejerina. Madrid, Spain
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Received 10 May 2020. Accepted 05 August 2020
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Abstract
Background

To study the possible relation between immunohistochemical expression of vascular endothelial growth factor receptor 1 (VEGFR1) and the maximum standardised uptake value (SUV max) of 18F-FDG PET in patients with non small cell lung cancer (NSCLC).

Material and Methods

The study included 39 patients with NSCLC (24 squamous cell carcinomas and 15 adenocarcinomas). According to the clinical stage, the patients were distributed as follows: 8 stage I, 7 stage II, 15 stage III and 9 stage IV. Immunohistochemical expression of VEGFR1 was studied through the technique of tissue-matrix using Tissue Arrayer Device (Beecher Instruments, Sun Prairie, WI), using the polyclonal antibody against VEGFR1 (Santa Cruz Biotechnology, California, USA).

Results

Positive VEGFR1 immunohistochemical expression was noted in 23 cases (59%). The number of positive tumours was not related with clinical stage but there was a different statistically significant association (p:0,0009) between VEGFR1 positivity and histological type, corresponding the greater percentages of positive results to adenocarcinomas (93,3%) versus in squamous cell carcinomas (37,5%). Likewise, SUV max values were higher (p: 0,039) in negative VEGFR1 carcinomas than in positive VEGFR1 tumors (r: 4-32,1; 16,4+/-6,4 (median 16,1) vs r: 3-47; 14,5+/-8,6 (12,8)).

Conclusions

Our results led us to consider that in NSCLC, the negative VEGFR1 immunohistochemical expression is associated significantly with squamous cell carcinomas subtype and with higher SUV max values in 18F-FDG-PET.

Keywords:
VEGFR1
non-small cell carcinomas
SUV max-18F-FDG-PET
Resumen
Antecedentes

Estudiar la posible relación entre la expresión inmunohistoquímica del receptor 1 del factor de crecimiento endotelial vascular (VEGFR1) y el valor máximo de captación estandarizada (SUV) de la PET 18F-FDG en pacientes con cáncer de pulmón de células no pequeñas (CPCNP).

Material y métodos

El estudio incluyó 39 pacientes con NSCLC (24 carcinomas de células escamosas y 15 adenocarcinomas). Según el estadio clínico, los pacientes se distribuyeron de la siguiente manera: 8 en estadio I, 7 estadio II, 15 estadio III y 9 estadio IV. Se estudió la expresión inmunohistoquímica del VEGFR1 mediante la técnica de la matriz tisular utilizando el dispositivo de arreglo de tejidos (Beecher Instruments, Sun Prairie, WI), utilizando el anticuerpo policlonal contra el VEGFR1 (Santa Cruz Biotechnology, California, USA).

Resultados

Se observó una expresión inmunohistoquímica positiva del VEGFR1 en 23 casos (59%). El número de tumores positivos no se relacionó con el estadio clínico pero hubo una asociación estadísticamente significativa diferente (p:0,0009) entre la positividad de VEGFR1 y el tipo histológico, correspondiendo los mayores porcentajes de resultados positivos a los adenocarcinomas (93,3%) frente a los carcinomas escamocelulares (37,5%). Asimismo, los valores SUV max fueron mayores (p: 0,039) en los carcinomas VEGFR1 negativos que en los tumores VEGFR1 positivos (r: 4-32,1; 16,4+/-6,4 (mediana 16,1) vs r: 3-47; 14,5+/-8,6 (12,8)).

Conclusiones

Nuestros resultados nos llevaron a considerar que en el CPCNP, la expresión inmunohistoquímica negativa de VEGFR1 se asocia significativamente con el subtipo de carcinomas de células escamosas y con valores SUV max más altos en 18F-FDG-PET.

Palabras clave:
VEGFR1
carcinomas de células no pequeñas
SUV max-18F-FDG-PET

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