Evidence map›Paper›PMID 39939521›Full record

ArticlePediatric research2025

Spatiotemporal expression pattern of dyslexia susceptibility 1 candidate 1 (DYX1C1) during rat cerebral cortex development.

Kazumasa Zensho, Ikuko Miyazaki, Aika Isse, Ichika Misawa, Kaori Masai, Makio Oka, Hirokazu Tsukahara, Masato Asanuma

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Article in Pediatric research, 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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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Kazumasa ZenshoDepartment of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan.
Ikuko MiyazakiDepartment of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan.
Aika IsseDepartment of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan.
Ichika MisawaDepartment of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan.
Kaori MasaiDepartment of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan.
Makio OkaDepartment of Psychosocial Medicine, National Center for Child Health and Development, Tokyo, 157-8535, Japan.
Hirokazu TsukaharaDepartment of Pediatrics, Okayama University Hospital, Okayama, 700-8558, Japan.
Masato AsanumaDepartment of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan. asachan@cc.okayama-u.ac.jp.ORCID http://orcid.org/0000-0002-2904-7836

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDevelopmental dyslexia (DD) is a common learning disorder with significant consequences for affected individuals. Although several candidate genes, including dyslexia susceptibility 1 candidate 1 (DYX1C1), have been implicated in dyslexia, their role in brain development remains unclear. We aimed to elucidate the spatiotemporal expression patterns of DYX1C1 during cerebral cortex development in rats.

methodsWe investigated DYX1C1 expression during cerebral cortex development using rat embryos at various gestational stages (E13.5, 15.5, 17.5 and 20.5) by immunohistochemistry (n = 7 embryos/stage), quantitative real-time PCR (n = 6), and in situ hybridization (n = 11-15).

resultsThe DYX1C1-positive cells were predominantly located in the outermost layers of the cortical plate, particularly at E15.5. DYX1C1 mRNA expression peaked at E15.5 and subsequently declined. DYX1C1-positive cells did not co-localize with reelin-positive Cajal-Retzius cells, but co-localized with neuronal markers expressed during development, and had shorter primary cilia than DYX1C1-negative cells.

conclusionsOur findings highlight the dynamic expression of DYX1C1 in the developing cerebral cortex of rats, implicating its involvement in neurodevelopmental processes. Further investigation of the functional interactions of DYX1C1, particularly its relationship with reelin and its role in cerebrocortical and hippocampal development, may provide insights into the pathophysiology of dyslexia and neurodevelopmental disorders. IMPACT: Our study elucidates spatiotemporal expression patterns of endogenous DYX1C1 predominantly in the primitive cortical zone (PCZ), outermost layer of the cortical plate (CP) during cerebral cortex development, particularly peaked at E15.5. We revealed the spatial relationship between DYX1C1-positive and reelin-expressing Cajal-Retzius (CR) cells, and co-localize with neuronal markers expressed during cerebral cortex development, indicating its contribution to neuronal migration and cortical layer formation. DYX1C1-positive cells mainly in the PCZ possess shorter primary cilia than DYX1C1-negative cells, suggesting the completion of migration.

Indexed as

Cerebral CortexGene Expression Regulation, DevelopmentalNerve Tissue ProteinsAnimalsCell Adhesion Molecules, NeuronalDyslexiaExtracellular Matrix ProteinsFemaleImmunohistochemistryIn Situ HybridizationRatsRats, Sprague-DawleyReal-Time Polymerase Chain ReactionReelin ProteinRNA, MessengerSerine EndopeptidasesCell Adhesion Molecules, NeuronalExtracellular Matrix ProteinsNerve Tissue ProteinsReelin ProteinRELN protein, humanReln protein, ratRNA, MessengerSerine Endopeptidases

Identifiers

PMID39939521
PMCPMC12507664

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.