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CIB1 protects against MPTP-induced neurotoxicity through inhibiting ASK1.


ABSTRACT: Calcium and integrin binding protein 1 (CIB1) is a calcium-binding protein that was initially identified as a binding partner of platelet integrin ?IIb. Although CIB1 has been shown to interact with multiple proteins, its biological function in the brain remains unclear. Here, we show that CIB1 negatively regulates degeneration of dopaminergic neurons in a mouse model of Parkinson's disease using 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). Genetic deficiency of the CIB1 gene enhances MPTP-induced neurotoxicity in dopaminergic neurons in CIB1-/- mice. Furthermore, RNAi-mediated depletion of CIB1 in primary dopaminergic neurons potentiated 1-methyl-4-phenyl pyrinidium (MPP+)-induced neuronal death. CIB1 physically associated with apoptosis signal-regulating kinase 1 (ASK1) and thereby inhibited the MPP+-induced stimulation of the ASK1-mediated signaling cascade. These findings suggest that CIB1 plays a protective role in MPTP/MPP+-induced neurotoxicity by blocking ASK1-mediated signaling.

SUBMITTER: Yoon KW 

PROVIDER: S-EPMC5610320 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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CIB1 protects against MPTP-induced neurotoxicity through inhibiting ASK1.

Yoon Kyoung Wan KW   Yang Hyun-Suk HS   Kim Young Mok YM   Kim Yeonsil Y   Kang Seongman S   Sun Woong W   Naik Ulhas P UP   Parise Leslie V LV   Choi Eui-Ju EJ  

Scientific reports 20170922 1


Calcium and integrin binding protein 1 (CIB1) is a calcium-binding protein that was initially identified as a binding partner of platelet integrin α<sub>IIb</sub>. Although CIB1 has been shown to interact with multiple proteins, its biological function in the brain remains unclear. Here, we show that CIB1 negatively regulates degeneration of dopaminergic neurons in a mouse model of Parkinson's disease using 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). Genetic deficiency of the CIB1 gene  ...[more]

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