Stroke & recovery
Do pericytes help the brain recover after a stroke?
Open access · cc by · source: Europe PMC
In PDGFRβ-deficient mice after permanent MCAO, weaker pericyte-driven infarct repair tracked with less peri-infarct astrogliosis, poorer oligodendrogenesis/remyelination, and worse functional recovery.
How this study connects
Role on claims
Each row is a claim on a concept or method page where this paper supports, challenges, or qualifies the statement. Roles are hand-checked — not a model guess.
The mechanistic account and the human evidence sit at levels that cannot confirm one another. Pericyte PDGFRβ signalling was necessary for astrogliosis, remyelination and functional recovery in mice after permanent occlusion, whereas the human trials measure connectivity, force and clinical scales and identify no cellular mechanism at all.
Evidence for the claim as stated.
Open questions
Tensions this paper is part of
From concept pages' “where studies disagree.” Disagreement means the same question; scope means different assays, populations, or outcomes.
The mechanistic account and the human evidence sit at levels that cannot confirm one another. Pericyte PDGFRβ signalling was necessary for astrogliosis, remyelination and functional recovery in mice after permanent occlusion, whereas the human trials measure connectivity, force and clinical scales and identify no cellular mechanism at all.
Inspect source passages
Do pericytes help the brain recover after a stroke?
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
Repair of infarct area size was significantly impaired in Pdgfrb+/– mice.
Time-dependent reduction of infarct area sizes, i.e., repair, was significantly impaired in Pdgfrb +/– mice with recovery of cerebral blood flow (CBF) in ischemic areas attenuated by defective leptomeningeal arteriogenesis and intrainfarct angiogenesis.
OPC differentiation/remyelination significantly attenuated in mutants.
Although peri-infarct proliferation of oligodendrocyte (OL) precursor cells (OPCs) was induced promptly after pMCAO regardless of intrainfarct repair, OPC differentiation and remyelination were significantly attenuated in Pdgfrb +/– mice.
Key findings
Repair, CBF recovery, STAT3-linked astrogliosis, OPC differentiation/remyelination, and functional recovery were impaired when pericyte PDGFRβ signaling was reduced; PCM/PDGF-BB boosted astrocyte activity and ACM+PCM/PDGF-BB enhanced myelination.
Methodology
They compared repair and peri-infarct remodeling after pMCAO in Pdgfrb+/– mice and tested how PDGF-BB–treated pericyte medium affects astrocytes and OPC differentiation in culture.
Limitations
Mouse permanent-occlusion findings do not prove that boosting PDGFRβ is a safe human stroke therapy.
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