Chromogranin A deficiency attenuates tauopathy by altering epinephrine–alpha-adrenergic receptor signaling in PS19 mice

Suborno Jati, Daniel Munoz-Mayorga, Shandy Shahabi, Kechun Tang, Yuren Tao, Dennis W. Dickson, Irene Litvan, Gourisankar Ghosh (), Sushil K. Mahata () and Xu Chen
Additional contact information
Suborno Jati: University of California San Diego
Daniel Munoz-Mayorga: University of California San Diego
Shandy Shahabi: University of California San Diego
Kechun Tang: University of California San Diego
Yuren Tao: University of California San Diego
Dennis W. Dickson: Mayo Clinic
Irene Litvan: University of California San Diego
Gourisankar Ghosh: University of California San Diego
Sushil K. Mahata: University of California San Diego
Xu Chen: University of California San Diego

Nature Communications, 2025, vol. 16, issue 1, 1-18

Abstract: Abstract Metabolic disorders such as insulin resistance and hypertension are potential risk factors for aging and neurodegenerative diseases. These conditions are reversed in Chromogranin A (CgA) knockout (CgA-KO) mice. CgA is known to be associated with protein aggregates in the brains of neurodegenerative diseases including Alzheimer’s disease (AD). Here, we investigated the role of CgA in Tau pathogenesis in AD and corticobasal degeneration (CBD). CgA ablation in Tauopathy mice (PS19) (CgA-KO/PS19) reduced pathological Tau aggregation and spreading, extended lifespan, and improved cognitive function. Transcriptomic and metabolite analysis of mouse cortices revealed elevated alpha-1-adrenergic receptors (Adra1) expression and high Epinephrine (EPI) levels in PS19 mice compared to WT mice, mirroring observations in AD and CBD patients. CgA depletion in PS19 mice lowered cortical EPI levels and the expression of Adra1 back to normal. Treatment of WT hippocampal organotypic slice cultures with EPI or Adra1 agonist promoted, while an Adra1 antagonist inhibited Tau hyperphosphorylation and formation of neurofibrillary tangles, which is unaltered upon CgA depletion. These findings demonstrate the involvement of CgA in Tau pathogenesis and highlight the interplay between the EPI-Adra1 signaling pathway and CgA in Tauopathy.

Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-025-59682-6 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59682-6

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-025-59682-6

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().