PMID- 22546502 OWN - NLM STAT- MEDLINE DCOM- 20130215 LR - 20220317 IS - 1879-0542 (Electronic) IS - 0165-2478 (Linking) VI - 146 IP - 1-2 DP - 2012 Aug 30 TI - Retinoic acid receptor beta deficiency reduces splenic dendritic cell population in a conditional mouse line. PG - 15-24 LID - 10.1016/j.imlet.2012.04.006 [doi] AB - Different studies have shown that retinoids and their receptors [retinoic acid receptors (RARs) and retinoid X receptors (RXRs)] have crucial effects on the differentiation and function of myeloid cells such as Dendritic cells (DCs) and the development of lymphoid tissue. However, the relationship between RARbeta expression and DCs has not been previously studied in vivo. This work examined the effect of decreased RARbeta expression on the number (and probably on differentiation) of splenic DCs and the structure of spleen using a conditional mouse that partially ablates floxed RARbeta gene (RARbeta(L-/L-) mice). Our results showed that RARbeta is expressed mainly in cells of the splenic White Pulp (WP) zone of Wild type mice. As expected, low levels of RARbeta expression were detected in the spleen of RARbeta(L-/L-) conditional mice. These results were consistent with a decrease in the population of splenic CD11c(+)MHC-II(+) cells. Histopathological analyses of conditional mice spleen indicated defects in cell organization and structure. The expression of Toll-like receptor 2 was also down-regulated in the spleen of these mice. These results suggest that RARbeta is involved in splenic cell organization as well as in the maintenance of splenic DCs population, indicating that RARbeta expression is important in homeostasis of immune system components. CI - Copyright (c) 2012 Elsevier B.V. All rights reserved. FAU - Serafin-Higuera, Nicolas AU - Serafin-Higuera N AD - Dept. of Genetics and Molecular Biology, CINVESTAV-IPN, 07360, Mexico, DF, Mexico. FAU - Hernandez-Sanchez, Javier AU - Hernandez-Sanchez J FAU - Ocadiz-Delgado, Rodolfo AU - Ocadiz-Delgado R FAU - Vazquez-Hernandez, Juan AU - Vazquez-Hernandez J FAU - Albino-Sanchez, Martha Estela AU - Albino-Sanchez ME FAU - Hernandez-Pando, Rogelio AU - Hernandez-Pando R FAU - Gariglio, Patricio AU - Gariglio P LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120421 PL - Netherlands TA - Immunol Lett JT - Immunology letters JID - 7910006 RN - 0 (CD11 Antigens) RN - 0 (Receptors, Retinoic Acid) RN - 0 (Tlr2 protein, mouse) RN - 0 (Toll-Like Receptor 2) RN - 0 (retinoic acid receptor beta) SB - IM MH - Animals MH - CD11 Antigens/genetics/immunology MH - Cell Lineage/genetics/*immunology MH - Dendritic Cells/*immunology/metabolism/pathology MH - Female MH - Flow Cytometry MH - Gene Expression/*immunology MH - Homeostasis/genetics/immunology MH - Immunity/genetics MH - Immunohistochemistry MH - Lymphocyte Count MH - Mice MH - Mice, Knockout MH - Receptors, Retinoic Acid/deficiency/genetics/*immunology MH - Reverse Transcriptase Polymerase Chain Reaction MH - Spleen/immunology/metabolism/*pathology MH - Toll-Like Receptor 2/genetics/immunology EDAT- 2012/05/02 06:00 MHDA- 2013/02/16 06:00 CRDT- 2012/05/02 06:00 PHST- 2011/11/18 00:00 [received] PHST- 2012/03/27 00:00 [revised] PHST- 2012/04/13 00:00 [accepted] PHST- 2012/05/02 06:00 [entrez] PHST- 2012/05/02 06:00 [pubmed] PHST- 2013/02/16 06:00 [medline] AID - S0165-2478(12)00109-5 [pii] AID - 10.1016/j.imlet.2012.04.006 [doi] PST - ppublish SO - Immunol Lett. 2012 Aug 30;146(1-2):15-24. doi: 10.1016/j.imlet.2012.04.006. Epub 2012 Apr 21.