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Postnatal Dynamic Ciliary ARL13B and ADCY3 Localization in the Mouse Brain
Katlyn K Brewer1, Kathryn M Brewer1, Tiffany T Terry2
1Department of Biology, Indiana University-Indianapolis, 723 W. Michigan St., Indianapolis, IN 46202, USA.
Cells
|February 9, 2024
Summary
Primary cilia in the brain, marked by ARL13B and ADCY3, change with age and location. These dynamic changes in cilia composition may explain neurodevelopmental issues and obesity seen in ciliopathies.
Area of Science:
- Neuroscience
- Cell Biology
- Developmental Biology
Background:
- Primary cilia are crucial cellular antennae involved in development and physiology, particularly in the central nervous system (CNS).
- Dysfunction of primary cilia leads to ciliopathies, genetic disorders with neurodevelopmental and metabolic phenotypes like obesity.
- Understanding the dynamic nature of ciliary protein composition in the CNS is vital for deciphering these complex disorders.
Purpose of the Study:
- To investigate the dynamic changes in the localization and abundance of primary cilia markers ARL13B and ADCY3 in the developing and adult mouse brain.
- To explore how age, brain region, and sex influence ciliary protein composition and cilia length.
- To establish a foundation for understanding the molecular mechanisms underlying CNS ciliopathies.
Main Methods:
- Immunofluorescence staining to detect ARL13B and ADCY3 in cilia across different brain regions and ages in mice.
- Quantitative analysis of cilia length and the proportion of cilia enriched for ARL13B and ADCY3.
- Comparison of ciliary marker distribution between perinatal and adult, and male and female mouse brains.
Main Results:
- Significant age- and region-dependent changes in the proportion of ARL13B- and ADCY3-enriched cilia were observed.
- ARL13B+ cilia decreased in relative abundance with age in several brain regions, including the hypothalamus.
- ADCY3 emerged as a prominent cilia marker in the adult brain, with distinct cilia lengths identified across brain regions and sexes.
Conclusions:
- Ciliary protein composition in the CNS is more dynamic than previously assumed, varying with age, brain region, and sex.
- These dynamic changes in cilia markers like ARL13B and ADCY3 may underlie neurodevelopmental phenotypes and metabolic disorders associated with ciliopathies.
- Further research into these dynamic cilia signatures is essential for understanding CNS ciliopathy mechanisms and developing targeted therapies.
