Downloads provided by UsageCountsProtein tyrosine phosphatase deficiency protects against the induction of the early apoptosis by paracetamol in hepatocytes
handle: 10261/124244
Protein tyrosine phosphatase deficiency protects against the induction of the early apoptosis by paracetamol in hepatocytes
[EN]: Acetaminophen (paracetamol, APAP) is a widely used analgesic and antipyretic drug safe at therapeutic doses but its overdose causes liver injury. Our goal was to explore whether protein tyrosine phosphatase 1B (PTP1B), a negative modulator of survival signaling pathways, plays a role in APAP-induced cell death in hepatocytes. Hepatotoxicity was evaluated in immortalized hepatocytes generated from wild-type (PTP1B+/+) and PTP1B-deficient (PTP1B-/-) mice. Apoptosis occurred as an early event only in APAP-treated PTP1B+/+ hepatocytes. PTP1B deficiency conferred protection against cell cycle arrest and loss of cellular viability. These data suggest that PTP1B as a target against APAP-induced liver failure.
[ES]: El paracetamol es un analgésico/antipirético hepatotóxico a dosis altas. Investigamos el papel de la proteína tirosina fosfatasa 1B (PTP1B), un modulador negativo de señalización de supervivencia celular, en la muerte celular temprana (apoptosis) inducida por paracetamol en hepatocitos. En hepatocitos controles se inducía apoptosis en respuesta al paracetamol. Este efecto se encontraba disminuido en hepatocitos deficientes en PTP1B. La falta de PTP1B protegía a los hepatocitos de la parada del ciclo celular y la pérdida de la viabilidad celular tras el tratamiento con paracetamol. Proponemos a la PTP1B como diana terapéutica frente al fallo hepático inducido por sobredosis de paracetamol.
We acknowledge the following grant support: SAF2012-33283 (MINECO, Spain), Comunidad de Madrid S2010/BMD-2423, EFSD and Amylin Paul Langerhans Grant and Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM, ISCIII, Spain).
Premio “Consejo General de Colegios Oficiales de Farmacéuticos” en el Concurso Científico 2013 de la Real Academia Nacional de Farmacia.
Peer Reviewed
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