PuSH - Publication Server of Helmholtz Zentrum München: Crybb2 associates with Tmsb4X and is crucial for dendrite morphogenesis.

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Sun, M.* ; Ahmad, N.* ; Zhang, R.* ; Graw, J.

Crybb2 associates with Tmsb4X and is crucial for dendrite morphogenesis.

Biochem. Biophys. Res. Commun. 503, 123-130 (2018)

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Dendrite morphogenesis is a complex but well-orchestrated process. Various studies reported the involvement of alteration in dendrite morphology in different brain disorders, including neuropsychiatric disorders. Initially, beta B2-crystallin (gene symbol: Crybb2/CRYBB2) has been described as a structural protein of the ocular lens. Mutations of the corresponding gene, Crybb2, lead to cataract. Recent studies in mice suggested that mutations in Crybb2 cause alterations in hippocampal morphology and function, albeit its function in hippocampal neuron development remained elusive. In the current study, we found that Crybb2 contributes to dendritogenesis in vitro and in vivo. Furthermore, screening of previous data on differential expression-arrays, we found Tmsb4X up-regulated in Crybb2 mutants mouse brain. Additionally, Tmsb4X was co-expressed with Crybb2 at actin-enriched cell ruffles. Over-expression of Tmsb4X in cultured hippocampal neurons inhibited dendritogenesis, which phenocopied Crybb2 knockdown. The current study uncovers a new function of Crybb2 in brain development, especially in dendritogenesis, and the possible interplay partner Tmsb4X involved in this process. (C) 2018 Elsevier Inc. All rights reserved.

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