Abstract
Reck (REversion-inducing Cysteine-rich protein with Kazal motifs) tumor suppressor gene encodes a multifunctional glycoprotein which inhibits the activity of several matrix metalloproteinases (MMPs), and has the ability to modulate the Notch and canonical Wnt pathways. Reck-deficient neuro-progenitor cells undergo precocious differentiation; however, modulation of Reck expression during progression of the neuronal differentiation process is yet to be characterized. In the present study, we demonstrate that Reck expression levels are increased during in vitro neuronal differentiation of PC12 pheochromocytoma cells and P19 murine teratocarcinoma cells and characterize mouse Reck promoter activity during this process. Increased Reck promoter activity was found upon induction of differentiation in PC12 cells, in accordance with its increased mRNA expression levels in mouse in vitro models. Interestingly, Reck overexpression, prior to the beginning of the differentiation protocol, led to diminished efficiency of the neuronal differentiation process. Taken together, our findings suggest that increased Reck expression at early stages of differentiation diminishes the number of neuron-like cells, which are positive for the beta-3 tubulin marker. Our data highlight the importance of Reck expression evaluation to optimize in vitro neuronal differentiation protocols.
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Acknowledgements
We are grateful to Professor Makoto Noda for kindly providing the Reck promoter constructs and to Dr. Irene Yan for kindly providing the rat pheochromocytoma PC12 cells. We also wish to thank Rosemary Oliveira and Michely Reis for secretarial assistance and Ms. Zizi de Mendonça, Dr. Marluce da Cunha Mantovani and Mr. Alan Pereira dos Santos for the excellent technical assistance. We acknowledge the invaluable financial support provided by the following agencies: Brazilian Federal Bank for Social and Economical Development (BNDES) grant number 09.2.1066.1; Federal Agency for Higher Education Training (CAPES/PVE) grant number 88881.068070/2014-01, and CAPES Finance Code 001; Brazilian National Council for Research and Development (CNPq) grant numbers 401430/2013-8, 457601/2013-2, 409960/2013-6, 426896/2016-5, 465656/2014-5, 454234/2014-7 and 455953/2014-7; MCS, MAF and HU are recipients of CNPq Productivity Award (number 3118/2015-6, 304566/2019-5 and 306392/2017-8, respectively; São Paulo Research State Foundation (FAPESP) grant numbers 2016/05311-2, 2016/18277-7; 2015/26328-8, 2014/50891-1, 2017/02413-1, 2018/20014-0, 2012/50880-4, 2018/07366-4, 2017/02413-1 and 2019/13112-8; Brazilian Federal Agency for Studies and Projects (FINEP) grants 01.08.0622.05, 51634-1 AD and 01.08.0484.00); Brazilian Science and Technology Ministry (MCTI) and the Health Ministry (MS-DECIT).
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Electronic supplementary material 1 (DOCX 188 kb) Reck mRNA expression during the different stages of the neuronal differentiation protocol of USP-4 murine embryonic cells. EB stands for embryoid bodies or spheroids; and DIF for the final differentiation stage. * represents p < 0.05, and ** p < 0.01 (DOCX 187 kb)
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Trombetta-Lima, M., Assis-Ribas, T., Cintra, R.C. et al. Impact of Reck expression and promoter activity in neuronal in vitro differentiation. Mol Biol Rep 48, 1985–1994 (2021). https://doi.org/10.1007/s11033-021-06175-6
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DOI: https://doi.org/10.1007/s11033-021-06175-6