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09:04
Analysis of Retinoic Acid-induced Neural Differentiation of Mouse Embryonic Stem Cells in Two and Three-dimensional Embryoid Bodies
Published on: April 22, 2017
Retinoic acid, immunity, and inflammation.
1Department of Comparative Pathobiology, School of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA.
Vitamins and Hormones
|March 23, 2011
Summary
Retinoic acid (RA), a metabolite of Vitamin A, is crucial for immune cell function and survival. Induced RA gradients during immune responses regulate diverse immune cells, including myeloid and lymphoid cells.
Area of Science:
- Immunology
- Nutritional Science
- Cell Biology
Background:
- Vitamin A (retinol) is absorbed, stored, and metabolized in the body, maintaining significant blood plasma concentrations.
- Retinoic acid (RA), derived from Vitamin A, is vital for mucosal immunity, immune tolerance, and basal immune cell survival and activation.
- Enzymes metabolizing Vitamin A are induced in immune cells like dendritic cells (DCs) during immune responses, leading to localized RA production.
Purpose of the Study:
- To review the current understanding of retinoic acid's function in regulating immune cells.
- To highlight the role of induced RA gradients in immune responses.
- To discuss the impact of RA on the differentiation and function of various immune cell types.
Main Methods:
- Literature review of existing research on Vitamin A metabolism and retinoic acid's role in immunity.
- Analysis of studies detailing the induction of Vitamin A-metabolizing enzymes in immune cells.
- Synthesis of findings on RA's regulatory effects on myeloid and lymphoid cell differentiation and function.
Main Results:
- Retinoic acid (RA) plays critical roles in mucosal immunity and immune tolerance.
- Basal levels of RA are essential for immune cell survival and activation.
- Induced RA production forms gradients that regulate gene expression, differentiation, and function in myeloid cells (neutrophils, macrophages, DCs) and lymphoid cells (T cells, B cells).
Conclusions:
- Retinoic acid is a key regulator of immune cell differentiation and function.
- The dynamic regulation of RA levels during immune responses is crucial for orchestrating appropriate immune cell activities.
- Understanding RA's multifaceted roles is essential for comprehending immune system regulation and developing targeted immunotherapies.
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