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Muerte celular apoptótica fototriggerada (PTA) utilizando la bomba de protones hacia afuera impulsada por la luz
Shin Nakao1, Keiichi Kojima1,2, Yuki Sudo1,2
1Division of Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan.
Journal of the American Chemical Society
|February 17, 2022
Resumen
Los investigadores desarrollaron un nuevo método optogenético para controlar la muerte celular programada (apoptosis) mediante la manipulación del pH intracelular utilizando bombas de protones activadas por luz. Esta técnica, llamada apoptosis fototriggerada (PTA, por sus siglas en inglés), muestra potencial para la eliminación precisa de células en varios organismos.
Área de la Ciencia:
- Biotecnología
- Biología celular
- Optogenética
Sus antecedentes:
- La apoptosis es crucial para la salud de los organismos multicelulares, y su desregulación está relacionada con enfermedades como el cáncer.
- Los métodos actuales para controlar la apoptosis carecen de una resolución espacial y temporal precisa.
Objetivo del estudio:
- Desarrollar un método óptico para regular la muerte celular programada mediante el control del pH intracelular.
- Investigar el potencial de la apoptosis fototriggerada (PTA) como herramienta optogenética.
Principales métodos:
- Utilizó Archaerhodopsin-3 (AR3) y Rubricoccus marinas xenorhodopsin (Rm XeR) para controlar el pH intracelular a través de la luz.
- Se ha aplicado PTA a líneas celulares humanas (HeLa, SH-SY5Y, A549) y al nematodo Caenorhabditis elegans.
- Evaluación de la inducción de la muerte celular y los cambios funcionales (por ejemplo, quimiotaxis) después de la irradiación.
Principales resultados:
- La contracción y muerte celular inducida por AR3 inducida por la luz en las células HeLa a pH fisiológico (7,4) mediante la activación de la vía apoptótica mitocondrial.
- El PTA fue efectivo en múltiples líneas celulares humanas, demostrando una amplia aplicabilidad.
- En el C. elegans, la PTA mediada por AR3 en las neuronas sensoriales redujo las respuestas de quimiotaxis, lo que indica una ablación celular exitosa in vivo.
Conclusiones:
- La PTA es un método optogenético versátil para inducir la apoptosis con un alto control espacio-temporal.
- La técnica es aplicable tanto in vitro como in vivo, ofreciendo potencial para la eliminación celular dirigida.
- El PTA es prometedor como una nueva herramienta terapéutica o de investigación para la ablación selectiva de células.
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