# Unraveling the Role of α2δ‐1 in Cerebral Hemorrhage: Calcium Overload, Endoplasmic Reticulum Stress, and Microglial Apoptosis

## TL;DR

This study explores how the α2δ-1 protein contributes to cerebral hemorrhage through calcium overload and cell stress, suggesting it as a potential treatment target.

## Contribution

The study identifies α2δ-1 as a novel mediator of calcium signaling and microglial apoptosis in cerebral hemorrhage.

## Key findings

- α2δ-1 knockdown reduces intracellular calcium concentration and phosphorylation of PLCr and IP3R.
- α2δ-1 induces endoplasmic reticulum stress and microglial apoptosis in BV2 cells.
- Targeting α2δ-1 may offer therapeutic potential for cerebral hemorrhage and related conditions.

## Abstract

Cerebral hemorrhage is a severe condition associated with high morbidity and mortality. Understanding the underlying pathogenesis is crucial for developing effective therapeutic strategies. This study aimed to investigate the role of the dysregulated α2δ‐1 protein in cerebral hemorrhage.

We observed a significant upregulation of α2δ‐1 in cerebral hemorrhage tissue. Knockdown of α2δ‐1 resulted in decreased intracellular calcium concentration and reduced phosphorylation of PLCr and IP3R in the presence of calcium. Additionally, α2δ‐1‐mediated calcium overload induced ERS in BV2 microglia, accompanied with increased phosphorylation of PERK and decreased ERS‐related protein levels.

α2δ‐1 knockdown significantly inhibited BV2 microglia apoptosis and downregulated apoptosis‐related proteins in the presence of calcium. Our study indicates the involvement of α2δ‐1 in calcium‐mediated signaling, endoplasmic reticulum stress, and BV2 microglia apoptosis.

The findings provide a basis for considering α2δ‐1 as a potential therapeutic target in cerebral hemorrhage and secondary brain injury conditions associated with calcium dysregulation.