Biomedicine & Pharmacotherapy· 2026Q1
A hypothesis-driven perspective on GLP-1R-β-catenin pathway crosstalk in astrocyte plasticity and endogenous neural repair
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- Q1SCImago
- 2026year
Short summary
A hypothesis suggests that glucagon-like peptide-1 receptor (GLP-1R) agonists, like exendin-4, may act permissively to enable astrocyte plasticity and endogenous neural repair by interacting with the Wnt/β-catenin pathway, rather than directly driving cell fate changes.
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Key points
- Astrocyte plasticity is crucial for CNS injury repair but is limited by chromatin, signaling networks, and inflammation.
- Wnt/β-catenin signaling influences astrocyte transcriptional competence by modulating chromatin accessibility.
- GLP-1R agonists (e.g., exendin-4) have neuroprotective effects and may intersect with β-catenin signaling.
- The authors hypothesize GLP-1R agonists act as permissive modulators, not deterministic drivers, of astrocyte fate remodeling for neural repair.
- This hypothesis is based on indirect evidence and requires direct astrocyte-specific validation.
AI-generated from the title and abstract; the full text is not read.
Abstract
Astrocytes exhibit pronounced, context-dependent plasticity following central nervous system (CNS) injury; however, their capacity for fate remodeling remains constrained by chromatin architecture, lineage-stabilizing signaling networks, inflammatory and metabolic states, and disease context. Canonical Wnt/β-catenin signaling has emerged as a context-sensitive regulator of astrocyte transcriptional competence through modulation of chromatin accessibility, enhancer activation, and progenitor-associated programs. However, Wnt activation alone appears insufficient to induce stable astrocyte-to-neuron conversion and should be interpreted within a broader intracellular signaling network. Glucagon-like peptide-1 receptor (GLP-1R) agonists, including exendin-4, exert neuroprotective, anti-inflammatory, and metabolic effects in neurological disease models. GLP-1R activation engages PI3K/Akt and cAMP/PKA signaling, which may intersect with regulatory mechanisms controlling β-catenin stability and transcriptional activity. However, many GLP-1R-mediated effects can also be explained through β-catenin-independent mechanisms involving inflammatory regulation, mitochondrial homeostasis, neurotrophic support, and cellular stress responses. We propose that exendin-4 may function as a permissive modulator rather than a deterministic driver of astrocyte fate remodeling. Importantly, this framework is derived predominantly from indirect evidence, may involve astrocyte-autonomous or non-autonomous mechanisms, and currently lacks direct astrocyte-specific validation. Future studies integrating receptor-expression mapping, pharmacokinetic assessment, lineage tracing, single-cell and spatial multi-omics, epigenomic profiling, and functional analysis will be essential to determine whether pharmacological modulation of permissive signaling states can contribute to endogenous neural repair.
The authors' abstract, as published at the source. Biomedicine & Pharmacotherapy, 2026 · DOI ↗
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