Cellular Senescence Is Induced by the Environmental Neurotoxin Paraquat and Contributes to Neuropathology Linked to Parkinson’s Disease
- Buck Inst. for Research on Aging, Novato, CA (United States); Touro Univ. California, Vallejo, CA (United States). College of Pharmacy; DOE/OSTI
- Buck Inst. for Research on Aging, Novato, CA (United States)
- Buck Inst. for Research on Aging, Novato, CA (United States); Univ. of California, Berkeley, CA (United States). Comparative Biochemistry Graduate Program
- Buck Inst. for Research on Aging, Novato, CA (United States); Touro Univ. California, Vallejo, CA (United States). College of Pharmacy
- Buck Inst. for Research on Aging, Novato, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Exposure to the herbicide paraquat (PQ) is associated with an increased risk of idiopathic Parkinson’s disease (PD). Therapies based on PQ’s presumed mechanisms of action have not, however, yielded effective disease therapies. Cellular senescence is an anticancer mechanism that arrests proliferation of replication-competent cells and results in a pro-inflammatory senescence associated secretory phenotype (SASP) capable of damaging neighboring tissues. Here, we demonstrate that senescent cell markers are preferentially present within astrocytes in PD brain tissues. Additionally, PQ was found to induce astrocytic senescence and an SASP in vitro and in vivo, and senescent cell depletion in the latter protects against PQ-induced neuropathology. Our data suggest that exposure to certain environmental toxins promotes accumulation of senescent cells in the aging brain, which can contribute to dopaminergic neurodegeneration. Therapies that target senescent cells may constitute a strategy for treatment of sporadic PD, for which environmental exposure is a major risk factor.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1623642
- Journal Information:
- Cell Reports, Journal Name: Cell Reports Journal Issue: 4 Vol. 22; ISSN 2211-1247
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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