Abstract
The Wnts are a family of glycoproteins that regulate cell proliferation, fate decisions, and differentiation. In our study, we examined the contribution of Wnts to the development of ventral midbrain (VM) dopaminergic (DA) neurons. Our results show that β-catenin is expressed in DA precursor cells and that β-catenin signaling takes place in these cells, as assessed in TOPGAL [Tcf optimal-promoter β-galactosidase] reporter mice. We also found that Wnt-1, -3a, and -5a expression is differentially regulated during development and that partially purified Wnts distinctively regulate VM development. Wnt-3a promoted the proliferation of precursor cells expressing the orphan nuclear receptor-related factor 1 (Nurr1) but did not increase the number of tyrosine hydroxylase-positive neurons. Instead, Wnt-1 and -5a increased the number of rat midbrain DA neurons in rat embryonic day 14.5 precursor cultures by two distinct mechanisms. Wnt-1 predominantly increased the proliferation of Nurr1+ precursors, up-regulated cyclins D1 and D3, and down-regulated p27 and p57 mRNAs. In contrast, Wnt-5a primarily increased the proportion of Nurr1+ precursors that acquired a neuronal DA phenotype and up-regulated the expression of Ptx3 and c-ret mRNA. Moreover, the soluble cysteine-rich domain of Frizzled-8 (a Wnt inhibitor) blocked endogenous Wnts and the effects of Wnt-1 and -5a on proliferation and the acquisition of a DA phenotype in precursor cultures. These findings indicate that Wnts are key regulators of proliferation and differentiation of DA precursors during VM neurogenesis and that different Wnts have specific and unique activity profiles.
Bibliography
Castelo-Branco, G., Wagner, J., Rodriguez, F. J., Kele, J., Sousa, K., Rawal, N., Pasolli, H. A., Fuchs, E., Kitajewski, J., & Arenas, E. (2003). Differential regulation of midbrain dopaminergic neuron development by Wnt-1, Wnt-3a, and Wnt-5a. Proceedings of the National Academy of Sciences, 100(22), 12747â12752.
References
45
Referenced
305
10.1126/science.276.5310.248
10.1073/pnas.95.7.4013
10.1006/mcne.1998.0673
10.1006/exnr.1999.7191
10.1038/73902
- Van Den Munckhof, P., Luk, K. C., Ste-Marie, L., Montgomery, J., Blanchet, P. J., Sadikot, A. F. & Drouin, J. (2003) Development (Cambridge, U.K.) 130, 2535–2542. / Development (Cambridge, U.K.) (2003)
10.1073/pnas.0230529100
10.1016/S0092-8674(00)81437-3
- Parr, B. A., Shea, M. J., Vassileva, G. & McMahon, A. P. (1993) Development (Cambridge, U.K.) 119, 247–261. / Development (Cambridge, U.K.) (1993)
10.1038/35077219
10.1126/science.1074192
- Megason, S. G. & McMahon, A. P. (2002) Development (Cambridge, U.K.) 129, 2087–2098. / Development (Cambridge, U.K.) (2002)
10.1038/24620
10.1101/gad.13.23.3149
10.1038/35077115
10.1126/science.1070824
10.1101/gad.937102
10.1016/S0092-8674(00)80689-3
10.1016/S0959-4388(00)00100-8
10.1016/S0896-6273(02)00860-7
10.1038/383332a0
10.1016/0092-8674(90)90385-R
10.1038/346847a0
10.1038/35035124
10.1523/JNEUROSCI.21-20-08108.2001
- Shimizu, H., Julius, M. A., Giarre, M., Zheng, Z., Brown, A. M. & Kitajewski, J. (1997) Cell Growth Differ. 8, 1349–1358.9419423 / Cell Growth Differ. (1997)
- DasGupta, R. & Fuchs, E. (1999) Development (Cambridge, U.K.) 126, 4557–4568. / Development (Cambridge, U.K.) (1999)
10.1016/0736-5748(88)90020-2
10.1038/417295a
10.1038/18884
10.1073/pnas.96.10.5522
10.1016/S0092-8674(02)01084-X
10.1074/jbc.M107013200
10.1038/nature01593
10.1073/pnas.96.7.3546
10.1038/35083601
10.1073/pnas.94.24.13305
10.1073/pnas.0330217100
10.1038/381785a0
10.1038/nrn812
10.1016/S0092-8674(03)00435-5
- Zheng, S., Ramachandran, B., Haigh, J. R., Palos, T. P., Steger, K. & Howard, B. D. (1996) Oncogene 12, 555–562.8637712 / Oncogene (1996)
10.1101/gad.227502
10.1523/JNEUROSCI.20-09-03182.2000
10.1038/10862
Dates
Type | When |
---|---|
Created | 21 years, 9 months ago (Oct. 29, 2003, 1:26 a.m.) |
Deposited | 3 years, 3 months ago (April 25, 2022, 9:39 p.m.) |
Indexed | 4 days, 20 hours ago (Aug. 20, 2025, 8:58 a.m.) |
Issued | 21 years, 10 months ago (Oct. 13, 2003) |
Published | 21 years, 10 months ago (Oct. 13, 2003) |
Published Online | 21 years, 10 months ago (Oct. 13, 2003) |
Published Print | 21 years, 9 months ago (Oct. 28, 2003) |
@article{Castelo_Branco_2003, title={Differential regulation of midbrain dopaminergic neuron development by Wnt-1, Wnt-3a, and Wnt-5a}, volume={100}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.1534900100}, DOI={10.1073/pnas.1534900100}, number={22}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Castelo-Branco, Gonçalo and Wagner, Joseph and Rodriguez, Francisco J. and Kele, Julianna and Sousa, Kyle and Rawal, Nina and Pasolli, Hilda Amalia and Fuchs, Elaine and Kitajewski, Jan and Arenas, Ernest}, year={2003}, month=oct, pages={12747–12752} }