This Accepted Manuscript has not been copyedited and formatted. The final version may differ from this version. Research Article: New Research | Development Perturbation of Serotonin Homeostasis during Adulthood Affects Serotonergic Neuronal Circuitry Abbreviated title: Serotonin regulates serotonergic wiring in adulthood Marta Pratelli1, Sara Migliarini1, Barbara Pelosi1, Francesco Napolitano2, Alessandro Usiello2 and Massimo Pasqualetti1,3,4 1 Department of Biology Unit of Cell and Developmental Biology, University of Pisa, Pisa, 56127, Italy 2 Ceinge Biotecnologie Avanzate, Naples, 80145, Italy 3 Center for Neuroscience and Cognitive Systems, Istituto Italiano Di Tecnologia, Rovereto, TN 38068, Italy 4 Neuroscience Institute, National Research Council (CNR), Pisa, 56124, Italy DOI: 10.1523/ENEURO.0376-16.2017 Received: 19 December 2016 Revised: 14 February 2017 Accepted: 17 February 2017 Published: 3 April 2017 Author contributions: M. Pratelli, S.M., B.P., and M. Pasqualetti designed research; M. Pratelli, S.M., B.P., F.N., A.U., and M. Pasqualetti performed research; M. Pratelli, S.M., F.N., A.U., and M. Pasqualetti analyzed data; M. Pratelli, B.P., and M. Pasqualetti wrote the paper. Funding: Italian Ministry of Education, University and Research (MIUR) prin 2008 200894SYW2 Funding: Toscana Life Science Foundation Orphan_0108 Program Funding: Norvegian Research Council Funding: PhD program Pisa University Funding: Regional Program and European Social Fund The authors declare no competing financial interests. This work was supported by Italian Ministry of Education, University and Research (MIUR) (Prin 2008, 200894SYW2), Toscana Life Sciences Foundation (Orphan_0108 program) and Norwegian Research Council to M. Pasqualetti. B.P. and M. Pratelli were supported by PhD program from University of Pisa. S.M. was supported by Regional Program and European Social Fund. We thank C. Valente for excellent technical assistance and members of our laboratory for valuable discussions and comments on the manuscript. We acknowledge Dr. P. Chambon and Dr. D. Metzger for the CMV-CreERT mouse line. Corresponding author: Massimo Pasqualetti, University of Pisa, Department of Biology, Unit of Cell and Developmental Biology, ss 12 Abetone e Brennero, 56127 Pisa, Italy. E-mail: [email protected] Cite as: eNeuro 2017; 10.1523/ENEURO.0376-16.2017 Alerts: Sign up at eneuro.org/alerts to receive customized email alerts when the fully formatted version of this article is published. Accepted manuscripts are peer-reviewed but have not been through the copyediting, formatting, or proofreading process. 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