Related Experiment Video
Updated: Sep 13, 2025
05:32
High-speed Video Microscopy Analysis for First-line Diagnosis of Primary Ciliary Dyskinesia
Published on: January 19, 2022
4.5K
Dpcd Induces Hydrocephalus Because of Partial Defects in the Inner Dynein Arms, With Abnormal Ciliary Motility
Taiki Yamamoto1,2, Kazuhito Takeuchi1, Yuichi Nagata1
1Department of Neurosurgery, Nagoya University, Nagoya, Aichi, Japan.
Cytoskeleton (Hoboken, N.J.)
|July 28, 2025
Summary
Primary ciliary dyskinesia (PCD) causes hydrocephalus due to defective motile cilia. This study shows the Deleted in primary ciliary dyskinesia (Dpcd) gene is crucial for inner dynein arm assembly and normal ciliary function.
Area of Science:
- Neuroscience
- Genetics
- Cell Biology
Background:
- Primary ciliary dyskinesia (PCD) is a genetic disorder affecting cilia function, leading to various symptoms including hydrocephalus.
- Motile cilia on ependymal cells are vital for cerebrospinal fluid (CSF) circulation; their dysfunction causes hydrocephalus.
- The Deleted in primary ciliary dyskinesia (Dpcd) gene is implicated in PCD, with its absence causing hydrocephalus in mice due to impaired ciliary function.
Purpose of the Study:
- To investigate the role of Dpcd in the motility of ventricular ependymal cilia.
- To elucidate the underlying mechanisms by which Dpcd deficiency leads to hydrocephalus.
Main Methods:
- Analysis of ciliary motility in Dpcd knockout (Dpcd-/-) mice.
- Assessment of cerebrospinal fluid flow velocity.
- Examination of inner dynein arm (IDA) structure and composition in ependymal cilia.
- Localization studies of Dpcd in wild-type mouse ependymal cells.
Main Results:
- Dpcd-/- mice exhibited decreased ciliary amplitude, abnormal waveforms, and reduced CSF flow velocity.
- A decrease in dynein axonemal heavy chains within IDAs was observed in the ependymal cilia of Dpcd-/- mice.
- Dpcd was found in the cytoplasm and cilia of ependymal cells in wild-type mice.
Conclusions:
- Dpcd plays a critical role in the proper assembly of inner dynein arms in ependymal cilia.
- Defects in IDA assembly due to Dpcd deficiency result in aberrant ciliary motility and contribute to hydrocephalus.
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