MARK2 variants cause autism spectrum disorder via the downregulation of WNT/β-catenin signaling pathway

Maolei Gong, Jiayi Li, Zailong Qin, Matheus Vernet Machado Bressan Wilke, Yijun Liu, Qian Li, Haoran Liu, Chen Liang, Joel A. Morales-Rosado, Ana S.A. Cohen, Susan S. Hughes, Bonnie R. Sullivan, Valerie Waddell, Marie José H. van den Boogaard, Richard H. van Jaarsveld, Ellen van Binsbergen, Koen L. van Gassen, Tianyun Wang, Susan M. Hiatt, Michelle D. AmaralWhitley V. Kelley, Jianbo Zhao, Weixing Feng, Changhong Ren, Yazhen Yu, Nicole J. Boczek, Matthew J. Ferber, Carrie Lahner, Sherr Elliott, Yiyan Ruan, Cyril Mignot, Boris Keren, Hua Xie, Xiaoyan Wang, Bernt Popp, Christiane Zweier, Juliette Piard, Christine Coubes, Frederic Tran Mau-Them, Hana Safraou, A. Micheil Innes, Julie Gauthier, Jacques L. Michaud, Daniel C. Koboldt, Odent Sylvie, Marjolaine Willems, Wen Hann Tan, Benjamin Cogne, Claudine Rieubland, Dominique Braun, Scott Douglas McLean, Konrad Platzer, Pia Zacher, Henry Oppermann, Lucie Evenepoel, Pierre Blanc, Laïla El Khattabi, Neshatul Haque, Nikita R. Dsouza, Michael T. Zimmermann, Raul Urrutia, Eric W. Klee, Yiping Shen, Hongzhen Du, Leonard Rappaport, Chang Mei Liu*, Xiaoli Chen*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Microtubule affinity-regulating kinase 2 (MARK2) contributes to establishing neuronal polarity and developing dendritic spines. Although large-scale sequencing studies have associated MARK2 variants with autism spectrum disorder (ASD), the clinical features and variant spectrum in affected individuals with MARK2 variants, early developmental phenotypes in mutant human neurons, and the pathogenic mechanism underlying effects on neuronal development have remained unclear. Here, we report 31 individuals with MARK2 variants and presenting with ASD, other neurodevelopmental disorders, and distinctive facial features. Loss-of-function (LoF) variants predominate (81%) in affected individuals, while computational analysis and in vitro expression assay of missense variants supported the effect of MARK2 loss. Using proband-derived and CRISPR-engineered isogenic induced pluripotent stem cells (iPSCs), we show that MARK2 loss leads to early neuronal developmental and functional deficits, including anomalous polarity and dis-organization in neural rosettes, as well as imbalanced proliferation and differentiation in neural progenitor cells (NPCs). Mark2+/− mice showed abnormal cortical formation and partition and ASD-like behavior. Through the use of RNA sequencing (RNA-seq) and lithium treatment, we link MARK2 loss to downregulation of the WNT/β-catenin signaling pathway and identify lithium as a potential drug for treating MARK2-associated ASD.

Original languageEnglish
Pages (from-to)2392-2410
Number of pages19
JournalAmerican Journal of Human Genetics
Volume111
Issue number11
Early online date16 Oct 2024
DOIs
Publication statusPublished - 7 Nov 2024

Keywords

  • ASD
  • autism spectrum disorder
  • lithium
  • LoF
  • loss-of-function
  • MARK2 variants
  • WNT/β-catenin signaling pathway

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