Effect of hypoxia on purine metabolism in human skeletal muscle cells




Palabras clave:

English, Hipoxia, cultivo celular, purinas, vía de rescate


Los mamíferos experimentan cierto grado de hipoxia durante su vida. Como respuesta al reto de hipoxia, las células de mamíferos orquestan respuestas específicas a nivel transcripcional y postraduccional que conducen a cambios en los metabolitos de purinas para hacer frente a las condiciones amenazantes. El objetivo de este estudio fue evaluar la respuesta de las enzimas involucradas en el metabolismo de las purinas de células musculares humanas a condiciones hipóxicas. Las células musculares en cultivo se expusieron a hipoxia y la actividad enzimática de la inosina monofosfato deshidrogenasa (IMPDH), la xantina oxidasa (XO), la purina nucleósido fosforilasa (PNP) y la hipoxantina guanina fosforribosil transferasa (HGPRT), así como su expresión de transcripción, se cuantificaron bajo condiciones de normoxia e hipoxia. Los metabolitos de purina (hipoxantina (HX), xantina (X), ácido úrico (UA), monofosfato de inosina (IMP), inosina, dinucleótido de nicotinamida y adenina (NAD+), adenosina, monofosfato de adenosina (AMP), difosfato de adenosina (ADP), trifosfato de adenosina (ATP), difosfato de guanosina (GDP) y trifosfato de guanosina (GTP)) también se cuantificaron. Se observó una reducción significativa de la actividad

de IMPDH y de las concentraciones de HX e IMP (p < 0.05) después de la hipoxia, lo que sugiere una disminución de la síntesis de novo de purinas. Después de la hipoxia, se observó una reducción global de la expresión transcripcional, lo que sugiere una reducción de la maquinaria metabólica del metabolismo de las purinas a nuevos estados estacionarios que equilibran la demanda de ATP y las vías de suministro de ATP.


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Cómo citar

Rivera-Pérez, C., Gaxiola-Robles, R., Olguín-Monroy, N., Lugo-Lugo, O., López-Cruz, R. I., & Zenteno-Savín, T. (2021). Effect of hypoxia on purine metabolism in human skeletal muscle cells. Biotecnia, 23(2). https://doi.org/10.18633/biotecnia.v23i2.1444



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