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Rigosertib-Activated JNK1/2 Eliminate Tumor Cells through p66Shc Activation.


ABSTRACT: Rigosertib, via reactive oxygen species (ROS), stimulates cJun N-terminal kinases 1/2 (JNK1/2), which inactivate RAS/RAF signaling and thereby inhibit growth and survival of tumor cells. JNK1/2 are not only regulated by ROS-they in turn can also control ROS production. The prooxidant and cell death function of p66Shc requires phosphorylation by JNK1/2. Here, we provide evidence that establishes p66Shc, an oxidoreductase, as a JNK1/2 effector downstream of Rigosertib-induced ROS production, DNA damage, and cell death. This may provide a common pathway for suppression of tumor cell growth by Rigosertib.

SUBMITTER: Gunther JK 

PROVIDER: S-EPMC7284707 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Rigosertib-Activated JNK1/2 Eliminate Tumor Cells through p66Shc Activation.

Günther Julia K JK   Nikolajevic Aleksandar A   Ebner Susanne S   Troppmair Jakob J   Khalid Sana S  

Biology 20200515 5


Rigosertib, via reactive oxygen species (ROS), stimulates cJun N-terminal kinases 1/2 (JNK1/2), which inactivate RAS/RAF signaling and thereby inhibit growth and survival of tumor cells. JNK1/2 are not only regulated by ROS-they in turn can also control ROS production. The prooxidant and cell death function of p66Shc requires phosphorylation by JNK1/2. Here, we provide evidence that establishes p66Shc, an oxidoreductase, as a JNK1/2 effector downstream of Rigosertib-induced ROS production, DNA d  ...[more]

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