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Related Experiment Video

Updated: Jun 5, 2025

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins

Published on: March 3, 2016

The X-linked intellectual disability gene CUL4B is critical for memory and synaptic function.

Wei Jiang¹, Jian Zhang¹, Molin Wang¹

¹The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.

Acta Neuropathologica Communications

|December 5, 2024

Summary

Cullin 4B (CUL4B) deficiency impairs brain cell communication and causes synapse loss, leading to intellectual disability and memory deficits in mice. This research sheds light on neurological disorder mechanisms.

Keywords:

CUL4B Intellectual disability Memory Synapse

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Last Updated: Jun 5, 2025

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Immunohistochemical Visualization of Hippocampal Neuron Activity After Spatial Learning in a Mouse Model of Neurodevelopmental Disorders

Immunohistochemical Visualization of Hippocampal Neuron Activity After Spatial Learning in a Mouse Model of Neurodevelopmental Disorders

Published on: May 12, 2015

Area of Science:

Neuroscience
Genetics
Molecular Biology

Background:

Cullin 4B (CUL4B) is crucial for the CRL4B E3 ubiquitin ligase complex.
CUL4B mutations cause X-linked intellectual disability (XLID).
The precise mechanism of CUL4B-related intellectual disability remains unclear.

Purpose of the Study:

Investigate the impact of CUL4B deficiency on brain cell transcriptional programs.
Elucidate the role of CUL4B in synaptic structure and function.
Understand the neurological basis of CUL4B-associated intellectual disability.

Main Methods:

Single-nucleus RNA sequencing (snRNA-seq) to analyze gene expression.
Golgi-Cox staining and immunostaining for synapse visualization.
Transmission electron microscopy (TEM) for ultrastructural analysis.
Electrophysiology to assess synaptic function.
Behavioral tests for learning and memory evaluation.

Main Results:

CUL4B depletion disrupts intercellular communication and alters cell-specific gene expression.
Significant synapse loss and increased synaptic cleft width observed in CUL4B-deficient mice.
Reduced AMPA receptor-mediated EPSCs in hippocampal neurons.
Impaired spatial learning and memory in CUL4B-deficient mice.

Conclusions:

CUL4B deficiency leads to synaptic morphological and functional abnormalities.
This study reveals the pathogenesis of CUL4B-related neurological disorders.
Findings highlight potential therapeutic targets for synaptic dysfunction and memory preservation.