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Cartografía espacial de las redes mitocondriales y la bioenergética en el cáncer de pulmón
Mingqi Han1, Eric A Bushong2,3, Mayuko Segawa4
1Pulmonary and Critical Care Medicine, David Geffen School of Medicine (DGSOM), University of California Los Angeles (UCLA), Los Angeles, CA, USA.
Nature
|March 16, 2023
Resumen
Las mitocondrias en el cáncer de pulmón de células no pequeñas (CPNPC) forman redes distintas que dictan la producción de energía celular. Estas estructuras mitocondriales, incluidos los arreglos peri-gotas y perinucleares, están vinculados a actividades metabólicas específicas y a la bioenergética tumoral.
Área de la Ciencia:
- Biología celular
- Investigación del cáncer
- Metabolomía
Sus antecedentes:
- Las mitocondrias son cruciales para el metabolismo y la bioenergética de las células cancerosas.
- La estructura de la red mitocondrial influye en la capacidad bioenergética.
- Los estudios in vivo que relacionan la estructura y la función mitocondriales en el cáncer son limitados.
Objetivo del estudio:
- Analizar in vivo la estructura de la red mitocondrial y los fenotipos bioenergéticos en el cáncer de pulmón de células no pequeñas (CPNPC).
- Para correlacionar distintas organizaciones de redes mitocondriales con actividades bioenergéticas específicas y dependencias metabólicas en los tumores de NSCLC.
Principales métodos:
- Utilizó una plataforma integrada que combina imágenes de tomografía por emisión de positrones, respirometría y microscopía electrónica de barrido en 3D.
- Se realizó un análisis estructural y funcional in vivo de las redes mitocondriales en modelos de CPNM.
Principales resultados:
- Se identificaron diversos fenotipos bioenergéticos y dependencias metabólicas en los tumores de NSCLC, que se correlacionan con estructuras de red mitocondriales distintas.
- Descubrió la compartimentación de las redes mitocondriales dentro de las células tumorales.
- Se han observado redes mitocondriales peri-gotas en tumores de alta fosforilación oxidativa (OXPHOS^HI) con alta oxidación de ácidos grasos.
- Se encontró localización mitocondrial perinuclear, remodelación de cristales y capacidad respiratoria alterada en tumores con bajo OXPHOS (OXPHOS ^ LO) regulados por alto flujo de glucosa.
Conclusiones:
- Las redes mitocondriales en NSCLC están compartimentadas en subpoblaciones distintas.
- Estas subpoblaciones regulan la capacidad bioenergética general de los tumores de NSCLC.
- La organización estructural de las mitocondrias está directamente relacionada con sus funciones bioenergéticas funcionales en el cáncer.
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