1. Touchscreen cognitive deficits, hyperexcitability and hyperactivity in males and females using two models of Cdkl5 deficiency
- Author
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Adhikari, Anna, Buchanan, Fiona KB, Fenton, Timothy A, Cameron, David L, Halmai, Julian ANM, Copping, Nycole A, Fink, Kyle D, and Silverman, Jill L
- Subjects
Male ,Genetics & Heredity ,Epilepsy ,Intellectual and Developmental Disabilities (IDD) ,Neurosciences ,Protein Serine-Threonine Kinases ,Neurodegenerative ,Biological Sciences ,Medical and Health Sciences ,Cyclin-Dependent Kinases ,Brain Disorders ,Mice ,Cognition ,Mental Health ,Seizures ,Behavioral and Social Science ,Serine ,Genetics ,Animals ,Humans ,2.1 Biological and endogenous factors ,Female ,Aetiology ,Epileptic Syndromes - Abstract
Many neurodevelopmental disorders (NDDs) are the result of mutations on the X chromosome. One severe NDD resulting from mutations on the X chromosome is CDKL5 deficiency disorder (CDD). CDD is an epigenetic, X-linked NDD characterized by intellectual disability (ID), pervasive seizures and severe sleep disruption, including recurring hospitalizations. CDD occurs at a 4:1 ratio, with a female bias. CDD is driven by the loss of cyclin-dependent kinase-like 5 (CDKL5), a serine/threonine kinase that is essential for typical brain development, synapse formation and signal transmission. Previous studies focused on male subjects from animal models, likely to avoid the complexity of X mosaicism. For the first time, we report translationally relevant behavioral phenotypes in young adult (8-20weeks) females and males with robust signal size, including impairments in learning and memory, substantial hyperactivity and increased susceptibility to seizures/reduced seizure thresholds, in both sexes, and in two models of CDD preclinical mice, one with a general loss-of-function mutation and one that is a patient-derived mutation.
- Published
- 2022