Novel insights into a retinoic-acid-induced cleft palate based on Rac1 regulation of the fibronectin arrangement

Cell and Tissue Research
Qinghuang TangHan-Sung Jung

Abstract

Retinoic acid (RA)-induced cleft palate results from both extrinsic obstructions by the tongue and internal factors within the palatal shelves. Our previous study showed that the spatiotemporal expression of Rac1 regulates the fibronectin (FN) arrangement through cell density alterations that play an important role in palate development. In this study, we investigate the involvement of the Rac1 regulation of the FN arrangement in RA-induced cleft palate. Our results demonstrate that RA-induced intrinsic alterations in palatal shelves, including a delayed progress of cell condensation, delay palate development, even after the removal of the tongue. Further analysis shows that RA treatment diminishes the region-distinctive expression of Rac1 within the palatal shelves, which reversely alters the fibrillar arrangement of FN. Furthermore, RA treatment disrupts the formation of lamellipodia, which are indicative structures of cell migration that are regulated by Rac1. These results suggest that the Rac1 regulation of the FN arrangement is involved in RA-induced cleft palate through the regulation of cell migration, which delays the progress of cell condensation and subsequently influences the FN arrangement, inducing a delay in pala...Continue Reading

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Citations

Jan 9, 2017·Biochimica Et Biophysica Acta. Molecular Cell Research·Sonia MissiroliPaolo Pinton
Jan 11, 2020·Frontiers in Cell and Developmental Biology·Katiúcia Batista Silva PaivaAriadne Letra
Jun 22, 2021·Frontiers in Cell and Developmental Biology·Ivana BukovaRadislav Sedlacek

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