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Localization of the Locus Coeruleus in the Mouse Brain
Published on: March 7, 2019
Distribution of the 4F2 light chain, LAT1, in the mouse brain
T Kageyama1, T Imura, A Matsuo
1Department of Neurology, Graduate School of Medicine, Kyoto University, Japan.
Insights
The LAT1 protein, crucial for amino acid transport, is found in key mouse brain regions. LAT1 expression is linked to neuronal cell proliferation in areas of adult neurogenesis.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- The 4F2 light chain 1 (LAT1) is a key component of the CD98 surface antigen.
- LAT1 plays vital roles in amino acid transport, cell survival, fusion, and integrin activation.
Purpose of the Study:
- To investigate the distribution of LAT1 within the mouse brain.
- To determine the functional role of LAT1 in neurogenic regions.
Main Methods:
- Immunohistochemistry was employed to visualize LAT1 expression in mouse brain tissue.
- Bromodeoxyuridine incorporation was used to identify proliferating cells in LAT1-expressing regions.
Main Results:
- LAT1 exhibited distinct expression patterns in the mouse brain, notably on microvessels and in specific nuclei and layers.
- Significant LAT1 expression was observed in the ventromedial hypothalamus, subgranular zone of the dentate gyrus, and ependymal layer of lateral ventricles.
- LAT1-positive cells in these three regions incorporated bromodeoxyuridine, indicating LAT1's presence in proliferating cells.
Conclusions:
- LAT1 is widely distributed in the mouse brain, with specific localization in neurogenic niches.
- LAT1 is implicated in neuronal cell proliferation within adult neurogenic regions.
- The study highlights LAT1's dual role in amino acid transport and neuronal cell proliferation in the brain.
Abstract:
LAT1 (the 4F2-light chain 1) is a component of the CD98 surface antigen which participates in multiple functions including amino acid transport, cell survival, cell fusion and integrin activation. We examined the distribution of LAT1 in the mouse brain using immunohistochemistry. LAT1 was expressed on the microvessels, the subfornical organ, the subcommissural organ, ventromedial nucleus of the hypothalamus, subgranular zone of the dentate gyrus, ependymal layer of the lateral ventricles, and the olfactory bulb. LAT1-positive cells incorporated bromodeoxyuridine in the latter three regions where neurogenesis occurs in adult mouse brain, indicating that LAT1 is involved in neuronal cell proliferation, as well as in amino acid transport in these regions.
