Related Experiment Video
Updated: Jan 11, 2026
08:42
Whole Mount Labeling of Cilia in the Main Olfactory System of Mice
Published on: December 27, 2014
11.8K
Constancy of olfactory cilia in rodents
Kirill Ukhanov1,2, Cedric R Uytingco3, Carlos de Celis4
1Department of Pharmacology, University of Virginia, Charlottesville, United States.
Chemical Senses
|November 10, 2025
Summary
Olfactory sensory neuron cilia length is constant across the olfactory epithelium but varies with cyclic nucleotide signaling. This finding impacts understanding of odor detection and chemosensory organ function.
Area of Science:
- Neuroscience
- Cell Biology
- Sensory Biology
Background:
- Olfactory sensory neurons (OSNs) use cilia for odor detection.
- Cilia stability is crucial for olfactory function.
- Variations in OSN cilia structure and function are not well understood.
Purpose of the Study:
- To investigate if olfactory cilia morphology varies between OSN subtypes.
- To determine if cilia length correlates with specific olfactory transduction pathways.
Main Methods:
- Analysis of cilia morphology in live, intact OSNs from mice and rats using ciliary-targeted fluorescent probes.
- Comparison of cilia length and number across different OSN subtypes and conditions.
Main Results:
- Average OSN cilia length and number are constant across the olfactory epithelium, regardless of age, sex, genetic background, or species.
- OSN cilia length differs based on the cyclic nucleotide used for transduction: cGMP-utilizing OSNs have shorter cilia than cAMP-utilizing OSNs.
- Specific receptors studied include guanylate cyclase-D (cGMP), M71, I7, and TAAR3 (cAMP).
Conclusions:
- Cyclic nucleotide signaling pathways are associated with olfactory cilia length.
- Cilia morphology and transduction mechanisms are linked, providing a basis for high-fidelity odor detection.
Related Concept Videos
01:03Olfactory Receptors: Location and Structure
11.1K
The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
11.1K
01:05Mechanism of Ciliary Motion
4.8K
The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
4.8K