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Quantitative optical coherence tomography imaging of intermediate flow defect phenotypes in ciliary physiology and
Brendan K Huang1, Ute A Gamm2, Stephan Jonas2
1Yale University, Department of Biomedical Engineering, 55 Prospect Street, New Haven, Connecticut 06511, United States.
Journal of Biomedical Optics
|March 10, 2015
Summary
Optical coherence tomography particle tracking velocimetry quantifies cilia-driven fluid flow in Xenopus. This method revealed decreased flow with genetic perturbations affecting ciliary function.
Area of Science:
- Pulmonary Physiology
- Ciliary Biology
- Biophysics
Background:
- Cilia-driven fluid flow is vital for lung function but poorly understood.
- Optical coherence tomography-based particle tracking velocimetry (OCT-PTV) offers a novel method for its assessment.
- Xenopus serves as a valuable model for studying ciliary dynamics.
Discussion:
- OCT-PTV effectively quantifies subtle variations in cilia-driven flow performance.
- Flow dynamics were analyzed during normal development and under various perturbations.
- Perturbations included mechanical (viscosity), pharmacological (serotonin signaling), and genetic (motor protein expression) challenges.
Key Insights:
- Gene knockdown of kif3a (involved in ciliogenesis) resulted in decreased ciliary flow.
- Knockdown of dnah9 (a ciliary motor protein) showed a dose-dependent reduction in flow.
- This study validates OCT-PTV for precise measurement of ciliary flow alterations.
Outlook:
- OCT-PTV can be instrumental in understanding respiratory diseases linked to ciliary dysfunction.
- Further research can explore therapeutic interventions targeting ciliary flow.
- This technique holds promise for drug screening and personalized medicine in pulmonary conditions.
