title: Reduced amount of olfactory receptor neurons in the rat model of depression.
abstract: Reduced olfactory sensitivity has been reported in depressive disorder. However, the pathological mechanism is still unclear. The reduced olfactory bulb (OB) volume and reduced hippocampal neurogenesis has been unraveled in major depressive disorder (MDD). However, changes in olfactory epithelium (OE) have not been reported, which might contribute to olfactory deficits in MDD. In the context, we investigated the thickness of OE in a chronic unpredictable mild stress (CUMS) rat model of depression using hematoxylin and eosin (HE) staining. Simultaneously, the basal cells (labeled by nerve growth factor receptor (p75NGFR)), immature olfactory receptor neurons (ORNs) (marked by growth-associated protein 43 (GAP43)) and mature ORNs (labeled by olfactory marker protein (OMP)) in OE were detected by immunohistochemistry. The results showed that the thickness of OE, the number of basal cells, immature ORNs as well as mature ORNs decreased dramatically in the OE of CUMS rats. Those findings indicate that the reduced number of ORNs might induce OE atrophy in CUMS rats and the abnormalities of the OE may be partially responsible for the reduced olfactory sensitivity in MDD.
authors.affiliation: Department of Neurology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China; Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China.
authors.forename: Qianlu
authors.initials: Q
authors.lastname: Li
authors.affiliation: Department of Neurology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China; Central Laboratory, Yongchuan Hospital, Chongqing Medical University, Chongqing, China; Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China.
authors.forename: Deyu
authors.initials: D
authors.lastname: Yang
authors.affiliation: Department of Neurology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China; Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Health Management, Yongchuan Hospital, Chongqing Medical University, Chongqing, China; Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China.
authors.forename: Li
authors.initials: L
authors.lastname: Liu
authors.affiliation: Department of Neurology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China; Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China.
authors.forename: Guibo
authors.initials: G
authors.lastname: Feng
authors.affiliation: Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Li
authors.affiliation: Central Laboratory, Yongchuan Hospital, Chongqing Medical University, Chongqing, China; Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Liao
authors.affiliation: Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China.
authors.forename: Youdong
authors.initials: Y
authors.lastname: Wei
authors.affiliation: Department of Neurology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China; Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China. Electronic address: zhiweili58@126.com.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Li
mesh_terms: D000818:Animals; D002452:Cell Count; D003865:Major Depressive Disorder / Q000209:etiology / Q000378:metabolism / Q000473:pathology*; D019922:GAP-43 Protein / Q000378:metabolism; D008297:Male; D009419:Nerve Tissue Proteins; D051842:Olfactory Marker Protein / Q000378:metabolism; D009831:Olfactory Mucosa / Q000378:metabolism / Q000473:pathology; D018034:Olfactory Receptor Neurons / Q000378:metabolism / Q000473:pathology*; D017207:Rats, Sprague-Dawley; D017978:Receptors, Growth Factor; D017475:Receptors, Nerve Growth Factor / Q000378:metabolism; D013315:Stress, Psychological / Q000150:complications
chemical_list: D019922:GAP-43 Protein; D009419:Nerve Tissue Proteins; D051842:Olfactory Marker Protein; C497599:Omp protein, rat; D017978:Receptors, Growth Factor; D017475:Receptors, Nerve Growth Factor; C068313:Ngfr protein, rat
keywords: Major depressive disorder; Olfactory deficits; Olfactory epithelium; Olfactory receptor neurons