DNA damage in embryonic neural stem cell determines FTLDs’ fate via early-stage neuronal necrosis
Abstract
The early-stage pathologies of frontotemporal lobal degeneration (FTLD) remain largely unknown. In VCPT262A-KI mice carrying VCP gene mutation linked to FTLD, insufficient DNA damage repair in neural stem/progenitor cells (NSCs) activated DNA-PK and CDK1 that disabled MCM3 essential for the G1/S cell cycle transition. Abnormal neural exit produced neurons carrying over unrepaired DNA damage and induced early-stage transcriptional repression-induced atypical cell death (TRIAD) necrosis accompanied by the specific markers pSer46-MARCKS and YAP. In utero gene therapy expressing normal VCP or non-phosphorylated mutant MCM3 rescued DNA damage, neuronal necrosis, cognitive function, and TDP43 aggregation in adult neurons of VCPT262A-KI mice, whereas similar therapy in adulthood was less effective. The similar early-stage neuronal necrosis was detected in PGRNR504X-KI, CHMP2BQ165X-KI, and TDPN267S-KI mice, and blocked by embryonic treatment with AAV–non-phospho-MCM3. Moreover, YAP-dependent necrosis occurred in neurons of human FTLD patients, and consistently pSer46-MARCKS was increased in cerebrospinal fluid (CSF) and serum of these patients. Collectively, developmental stress followed by early-stage neuronal necrosis is a potential target for therapeutics and one of the earliest general biomarkers for FTLD.
Journal Article
JOURNAL:Life Science Alliance
TITLE:DNA damage in embryonic neural stem cell determines FTLDs’ fate via early-stage neuronal necrosis
DOI:https://doi.org/10.26508/lsa.202101022
TITLE:DNA damage in embryonic neural stem cell determines FTLDs’ fate via early-stage neuronal necrosis
DOI:https://doi.org/10.26508/lsa.202101022
Correspondence to
OKAZAWA Hitoshi, M.D., Ph.D., Professor
Department of Neuropathology,
Medical Research Institute,
Tokyo Medical and Dental University(TMDU)
E-mail:okazawa.npat(at)mri.tmd.ac.jp
*Please change (at) in e-mail addresses to @ on sending your e-mail to contact personnels.
Department of Neuropathology,
Medical Research Institute,
Tokyo Medical and Dental University(TMDU)
E-mail:okazawa.npat(at)mri.tmd.ac.jp
*Please change (at) in e-mail addresses to @ on sending your e-mail to contact personnels.