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Comentario sobre "Una bacteria que degrada y asimila el polietileno tereftalato"

Yu Yang¹, Jun Yang², Lei Jiang²

¹Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, P.R. China.

Science (New York, N.Y.)

|August 20, 2016

Resumen

Se afirmó que la bacteria Ideonella sakaiensis 201-F6 degrada el tereftalato de polietileno (PET). Sin embargo, el estudio

Área de la Ciencia:

Microbiología
Biotecnología
Ciencias de los Polímeros

Sus antecedentes:

El poli (tereftalato de etileno) (PET) es un polímero plástico muy utilizado.
La degradación microbiana de los plásticos es un área de gran interés para la investigación.
Anteriormente se informó que la Ideonella sakaiensis 201-F6 degradaba el PET.

Objetivo del estudio:

Evaluar críticamente la eficiencia de degradación reportada de Ideonella sakaiensis 201-F6 en el PET.
Evaluar las pruebas experimentales de la despolimerización y asimilación del PET por la bacteria.
Determinar la validez de las conclusiones anteriores sobre la degradación microbiana del PET.

Principales métodos:

Reanálisis de las condiciones y datos experimentales presentados en Yoshida et al.
Examen del tipo y la cristalinidad del PET utilizado en el estudio original.
Revisión de los diseños experimentales para verificar la despolimerización y la asimilación.

Principales resultados:

El estudio original utilizó PET de baja cristalinidad, lo que podría aumentar las tasas de degradación.
Faltaban experimentos claves para demostrar inequívocamente la despolimerización y la asimilación.
La eficiencia de degradación reportada puede ser una sobreestimación.

Conclusiones:

Las conclusiones extraídas por Yoshida et al. en cuanto a la eficacia de la degradación de Ideonella sakaiensis 201-F6 en el PET son cuestionables.
Se necesitan más estudios rigurosos para confirmar las capacidades de asimilación de PET de la bacteria.
El estudio pone de relieve la importancia de una metodología precisa en la investigación de la degradación del plástico microbiano.

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