Details

Autor(en) / Beteiligte

• Cacialli, Pietro
• D'angelo, Livia
• Kah, Olivier
• Coumailleau, Pascal
• Gueguen, Marie‐Madeleine
• Pellegrini, Elisabeth
• Lucini, Carla

Titel

Neuronal expression of brain derived neurotrophic factor in the injured telencephalon of adult zebrafish

Ist Teil von

• Journal of comparative neurology (1911), 2018-03, Vol.526 (4), p.569-582

Ort / Verlag

United States: Wiley Subscription Services, Inc

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• The reparative ability of the central nervous system varies widely in the animal kingdom. In the mammalian brain, the regenerative mechanisms are very limited and newly formed neurons do not survive longer, probably due to a non‐suitable local environment. On the opposite, fish can repair the brain after injury, with fast and complete recovery of damaged area. The brain of zebrafish, a teleost fish widely used as vertebrate model, also possesses high regenerative properties after injury. Taking advantage of this relevant model, the aim of the present study was to investigate the role of brain‐derived neurotrophic factor (BDNF) in the regenerative ability of adult brain, after stab wound telencephalic injury. BDNF is involved in many brain functions and plays key roles in the repair process after traumatic brain lesions. It has been reported that BDNF strengthens the proliferative activity of neuronal precursor cells, facilitates the neuronal migration toward injured areas, and shows survival properties due to its anti‐apoptotic effects. BDNF mRNA levels, assessed by quantitative PCR and in situ hybridization at 1, 4, 7, and 15 days after the lesion, were increased in the damaged telencephalon, mostly suddenly after the lesion. Double staining using in situ hybridization and immunocytochemistry revealed that BDNF mRNA was restricted to cells identified as mature neurons. BDNF mRNA expressing neurons mostly increased in the area around the lesion, showing a peak 1 day after the lesion. Taken together, these results highlight the role of BDNF in brain repair processes and reinforce the value of zebrafish for the study of regenerative neurogenesis. In zebrafish telencephalon BDNF mRNA was assessed by quantitative PCR and in situ hybridization at 1, 4, 7, and 15 days post lesion. The authors demonstrated that: (a) the peak of BDNF mRNA expression was observed early after the lesion, mostly in the area surrounding the injury; (b) BDNF mRNA induction was observed in mature neuronal populations.