ArticleHistology and histopathology2025
Wnt5a regulates the expression of developmental genes in the adult retina following optic nerve crush injury.
Article in Histology and histopathology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Canonical and non-canonical Wnt signaling pathways are well-characterized regulators of retinal development. Wnt signaling also promotes neuroprotection and regeneration in adult tissues, including retinal ganglion cell (RGC) survival and axonal regrowth after optic nerve injury. However, it is unknown whether Wnt-dependent neuroprotection after injury in the adult CNS is associated with altered expression of developmental genes. Müller glia are a prominent radial glia type in the retina that play critical roles in retinal neuron protection, RGC neurite growth, and axon regeneration by acting through Wnt and other signaling pathways. We recently used mass spectrometry to characterize proteins secreted from Müller glia in response to Wnt signaling. In this study, we investigated whether the Wnt-induced Müller glia secretome includes proteins involved in development and whether their corresponding genes are regulated by Wnt5a during axonal regeneration in a mouse model of optic nerve crush (ONC) injury. Adult mice received intravitreal injections of Wnt5a or saline at the time of ONC injury, and then retina tissue was collected at early time points post-injury. The expression of candidate Wnt-regulated developmental genes and related proteins were characterized by qPCR and immunohistochemistry. Our findings revealed that Wnt5a downregulated the expression of specific developmental genes, including cilia-related genes
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