Immune Cells Enter the Brain After Stroke and Promote Blood Vessel Repair via CGRP
ILC2 immune cells infiltrate the brain after stroke and promote new blood vessel growth through α-CGRP production, improving long-term recovery.
Quick Facts
What This Study Found
ILC2s infiltrate the brain post-stroke via CXCR1 and produce α-CGRP that initiates angiogenic sprouting, improving long-term functional recovery.
Key Numbers
ILC2s enter brain parenchyma via CXCR1 after ischemic stroke. Alpha-CGRP production by ILC2s required for angiogenic sprouting. CGRP-depleted ILC2s failed to initiate angiogenesis. CGRP receptor impairment on endothelial cells abolished the effect.
How They Did This
In vivo and in vitro ILC2 expansion studies in ischemic stroke mouse models with functional recovery assessment.
Why This Research Matters
Stroke recovery options are limited — harnessing the brain's own immune repair system through ILC2s and CGRP could open new therapeutic pathways.
The Bigger Picture
This reveals CGRP as a brain repair molecule (not just a migraine target), expanding our understanding of how the immune and vascular systems collaborate after brain injury.
What This Study Doesn't Tell Us
Mouse model study — human stroke pathophysiology and immune responses may differ. In vivo ILC2 expansion techniques are not yet clinically available.
Questions This Raises
- ?Could boosting ILC2 numbers or CGRP levels after stroke improve human outcomes?
- ?Do anti-CGRP migraine drugs interfere with stroke recovery?
Trust & Context
- Key Stat:
- α-CGRP Produced by brain-infiltrating ILC2s to initiate angiogenic sprouting after ischemic stroke
- Evidence Grade:
- Preclinical mouse study with robust mechanistic evidence — highly informative but requires human translation.
- Study Age:
- Published in 2025, revealing a novel neuroimmune repair mechanism post-stroke.
- Original Title:
- Brain-infiltrating ILC2s boost poststroke angiogenic initiation through α-CGRP production.
- Published In:
- The Journal of experimental medicine, 222(11) (2025)
- Authors:
- Ping, An, Yang, Fan(4), Lu, Lingxiao, Zhang, Xiaotao, Lu, Jianan, Li, Huaming, Gu, Yichen, Jin, Ziyang, Zhang, Jianmin, Shi, Ligen
- Database ID:
- RPEP-13058
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
How do immune cells help repair the brain after stroke?
ILC2 cells enter the brain from the bloodstream and produce CGRP, which triggers new blood vessel growth essential for recovery.
Could this discovery lead to new stroke treatments?
Potentially — boosting ILC2 activity or CGRP production after stroke could become a therapeutic strategy, but human studies are needed first.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-13058APA
Ping, An; Yang, Fan; Lu, Lingxiao; Zhang, Xiaotao; Lu, Jianan; Li, Huaming; Gu, Yichen; Jin, Ziyang; Zhang, Jianmin; Shi, Ligen. (2025). Brain-infiltrating ILC2s boost poststroke angiogenic initiation through α-CGRP production.. The Journal of experimental medicine, 222(11). https://doi.org/10.1084/jem.20241830
MLA
Ping, An, et al. "Brain-infiltrating ILC2s boost poststroke angiogenic initiation through α-CGRP production.." The Journal of experimental medicine, 2025. https://doi.org/10.1084/jem.20241830
RethinkPeptides
RethinkPeptides Research Database. "Brain-infiltrating ILC2s boost poststroke angiogenic initiat..." RPEP-13058. Retrieved from https://rethinkpeptides.com/research/ping-2025-braininfiltrating-ilc2s-boost-poststroke
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.