PMID- 26617157 OWN - NLM STAT- MEDLINE DCOM- 20161213 LR - 20161230 IS - 1618-0402 (Electronic) IS - 0940-9602 (Linking) VI - 204 DP - 2016 Mar TI - Morphological differences in adipose tissue and changes in BDNF/Trkb expression in brain and gut of a diet induced obese zebrafish model. PG - 36-44 LID - S0940-9602(15)00145-4 [pii] LID - 10.1016/j.aanat.2015.11.003 [doi] AB - Obesity is a multifactorial disease generated by an alteration in balance between energy intake and expenditure, also dependent on genetic and non-genetic factors. Moreover, various nuclei of the hypothalamus receive and process peripheral stimuli from the gastrointestinal tract, controlling food intake and therefore energy balance. Among anorexigenic molecules, brain-derived neurotrophic factor (BDNF) acts through the tyrosine-kinase receptor TrkB. Numerous data demonstrate that the BDNF/TrkB system has a fundamental role in the control of food intake and body weight. Quantitative PCR and immunohistochemistry for both BDNF and TrkB were used to determine changes in levels in the brain and gastro-intestinal tract of an experimental zebrafish model of diet-induced obesity. Overfed animals showed increased weight and body mass index as well as accumulation of adipose tissue in the visceral, subcutaneous and hepatic areas. These changes were concomitant with decreased levels of BDNF mRNA in the gastro-intestinal tract and increased expression of TrkB mRNA in the brain. Overfeeding did not change the density of cells displaying immunoreactivity for BDNF or TrkB in the brain although both were significantly diminished in the gastro-intestinal tract. These results suggest an involvement of the BDNF/TrkB system in the regulation of food intake and energy balance in zebrafish, as in mammals. CI - Copyright (c) 2015 Elsevier GmbH. All rights reserved. FAU - Montalbano, Giuseppe AU - Montalbano G AD - Dipartimento di Scienze Veterinarie, 98168 Messina, Italy; Zebrafish Neuromorphology Lab, Universita di Messina, Polo Universitario SS. Annunziata, 98168 Messina, Italy. Electronic address: gmontalbano@unime.it. FAU - Mania, Manuela AU - Mania M AD - Dipartimento di Scienze Veterinarie, 98168 Messina, Italy; Zebrafish Neuromorphology Lab, Universita di Messina, Polo Universitario SS. Annunziata, 98168 Messina, Italy. FAU - Guerrera, Maria Cristina AU - Guerrera MC AD - Dipartimento di Scienze Veterinarie, 98168 Messina, Italy; Zebrafish Neuromorphology Lab, Universita di Messina, Polo Universitario SS. Annunziata, 98168 Messina, Italy. FAU - Abbate, Francesco AU - Abbate F AD - Dipartimento di Scienze Veterinarie, 98168 Messina, Italy; Zebrafish Neuromorphology Lab, Universita di Messina, Polo Universitario SS. Annunziata, 98168 Messina, Italy. FAU - Laura, Rosaria AU - Laura R AD - Dipartimento di Scienze Veterinarie, 98168 Messina, Italy; Zebrafish Neuromorphology Lab, Universita di Messina, Polo Universitario SS. Annunziata, 98168 Messina, Italy. FAU - Navarra, Michele AU - Navarra M AD - Dipartimento di Scienza del Farmaco e Prodotti per la Salute, Universita di Messina, Polo Universitario SS. Annunziata, 98168 Messina, Italy. FAU - Vega, Jose A AU - Vega JA AD - Departamento de Morfologia y Biologia Celular, Facultad de Medicina, Universidad de Oviedo, Av de Julian Claveria 6, 33006 Oviedo, Espana; Facultad de Ciencias de la Salud, Universidad Autonoma de Chile, 5 Poniente, 1670 Talca, Chile. FAU - Ciriaco, Emilia AU - Ciriaco E AD - Dipartimento di Scienze Veterinarie, 98168 Messina, Italy; Zebrafish Neuromorphology Lab, Universita di Messina, Polo Universitario SS. Annunziata, 98168 Messina, Italy. FAU - Germana, Antonino AU - Germana A AD - Dipartimento di Scienze Veterinarie, 98168 Messina, Italy; Zebrafish Neuromorphology Lab, Universita di Messina, Polo Universitario SS. Annunziata, 98168 Messina, Italy. LA - eng PT - Journal Article DEP - 20151123 PL - Germany TA - Ann Anat JT - Annals of anatomy = Anatomischer Anzeiger : official organ of the Anatomische Gesellschaft JID - 100963897 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (RNA, Messenger) RN - EC 2.7.10.1 (Receptor, trkB) SB - IM MH - Adipose Tissue/*pathology MH - Animals MH - Body Mass Index MH - Body Weight MH - Brain Chemistry/*genetics MH - Brain-Derived Neurotrophic Factor/biosynthesis/*genetics MH - *Diet MH - Eating MH - Energy Metabolism/genetics MH - Gastrointestinal Tract/*metabolism MH - Liver/metabolism MH - Male MH - Obesity/*genetics/*metabolism MH - RNA, Messenger/biosynthesis/genetics MH - Receptor, trkB/biosynthesis/*genetics MH - Zebrafish OTO - NOTNLM OT - Brain-derived neurotrophic factor OT - Diet induced obesity OT - TrkB OT - Zebrafish EDAT- 2015/12/01 06:00 MHDA- 2016/12/15 06:00 CRDT- 2015/12/01 06:00 PHST- 2015/06/16 00:00 [received] PHST- 2015/10/14 00:00 [revised] PHST- 2015/11/04 00:00 [accepted] PHST- 2015/12/01 06:00 [entrez] PHST- 2015/12/01 06:00 [pubmed] PHST- 2016/12/15 06:00 [medline] AID - S0940-9602(15)00145-4 [pii] AID - 10.1016/j.aanat.2015.11.003 [doi] PST - ppublish SO - Ann Anat. 2016 Mar;204:36-44. doi: 10.1016/j.aanat.2015.11.003. Epub 2015 Nov 23.