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Bergami, M.* ; Rimondini, R.* ; Santi, S.* ; Blum, R.* ; Götz, M. ; Canossa, M.*

Deletion of TrkB in adult progenitors alters newborn neuron integration into hippocampal circuits and increases anxiety-like behavior.

Proc. Natl. Acad. Sci. U.S.A. 105, 15570-15575 (2008)
Verlagsversion Volltext DOI PMC
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New neurons in the adult dentate gyrus are widely held to incorporate into hippocampal circuitry via a stereotypical sequence of morphological and physiological transitions, yet the molecular control over this process remains unclear. We studied the role of brain-derived neurotrophic factor (BDNF)/TrkB signaling in adult neurogenesis by deleting the full-length TrkB via Cre expression within adult progenitors in TrkB(lox/lox) mice. By 4 weeks after deletion, the growth of dendrites and spines is reduced in adult-born neurons demonstrating that TrkB is required to create the basic organization of synaptic connections. Later, when new neurons normally display facilitated synaptic plasticity and become preferentially recruited into functional networks, lack of TrkB results in impaired neurogenesis-dependent long-term potentiation and cell survival becomes compromised. Because of the specific lack of TrkB signaling in recently generated neurons a remarkably increased anxiety-like behavior was observed in mice carrying the mutation, emphasizing the contribution of adult neurogenesis in regulating mood-related behavior.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter BDNF; LTP; neurogenesis; plasticity; dendritogenesis; GENERATED GRANULE CELLS; ENHANCED SYNAPTIC PLASTICITY; DENTATE GYRUS; NEUROTROPHIC FACTOR; NERVOUS-SYSTEM; NEUROGENESIS; BRAIN; BDNF; DEPRESSION; RAT
ISSN (print) / ISBN 0027-8424
e-ISSN 1091-6490
Zeitschrift Proceedings of the National Academy of Sciences of the United States of America
Quellenangaben Band: 105, Heft: 40, Seiten: 15570-15575 Artikelnummer: , Supplement: ,
Verlag National Academy of Sciences
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Stem Cell Research (ISF)