PMID- 26666182 OWN - NLM STAT- MEDLINE DCOM- 20160310 LR - 20191113 IS - 0001-723X (Print) IS - 0001-723X (Linking) VI - 59 IP - 4 DP - 2015 Dec TI - Transolfactory neuroinvasion by viruses threatens the human brain. PG - 338-49 AB - Viral neuroinvasion via the olfactory system has been investigated in a variety of virus-animal models by scientists in many fields including virologists, pathologists, and neurologists. In humans, herpes simplex virus type 1 (HSV-1), human herpesvirus 6 (HHV-6), Borna disease virus, rabies virus, and influenza A virus have been shown to take the olfactory route for neuroinvasion based on forensic and post-mortem specimens. This article briefly summarizes the anatomy, physiology, and immunology of the olfactory system and presents a battery of neurovirulent viruses that may threaten the human brain by invading through this peripheral pathway, especially focusing on two of the most intensively studied viruses--HSV-1 and influenza A virus. Viruses may insidiously invade the olfactory neural network not only to precipitate encephalitis/encephalopathy but also to promote the development of neurodegenerative and demyelinating disorders. Substantial information obtained by analyzing human specimens is required to argue for or against this hypothesis. FAU - Mori, I AU - Mori I LA - eng PT - Journal Article PT - Review PL - Slovakia TA - Acta Virol JT - Acta virologica JID - 0370401 SB - IM MH - Animals MH - Brain/immunology/*virology MH - Humans MH - Olfactory Mucosa/immunology/*virology MH - Virus Diseases/immunology/*virology MH - *Virus Physiological Phenomena OTO - NOTNLM OT - virus; olfactory neuron; human brain; encephalitis; neurodegenerative disorders. EDAT- 2015/12/17 06:00 MHDA- 2016/03/11 06:00 CRDT- 2015/12/16 06:00 PHST- 2015/12/16 06:00 [entrez] PHST- 2015/12/17 06:00 [pubmed] PHST- 2016/03/11 06:00 [medline] AID - 10.4149/av_2015_04_338 [doi] PST - ppublish SO - Acta Virol. 2015 Dec;59(4):338-49. doi: 10.4149/av_2015_04_338.