| Title: | The Chemical Sensitivity and Electrical Activity of Individual Olfactory Sensory Neurons to a Range of Sex Pheromones and Food Odors in the Goldfish |
| Address: | "Okazaki Institute for Integrative Bioscience, Biosensing Research, Higashiyama Myodaijicho, Okazaki, Aichi, Japan. Department of Fisheries, Wildlife and Conservation Biology, University of Minnesota, St Paul, MN, USA" |
| ISSN/ISBN: | 1464-3553 (Electronic) 0379-864X (Print) 0379-864X (Linking) |
| Abstract: | "Although it is well established that the olfactory epithelium of teleost fish detects at least 6 classes of biologically relevant odorants using 5 types of olfactory sensory neurons (OSNs), little is understood about the specificity of individual OSNs and thus how they encode identity of natural odors. In this study, we used in vivo extracellular single-unit recording to examine the odor responsiveness and physiological characteristics of 109 individual OSNs in mature male goldfish to a broad range of biological odorants including feeding stimuli (amino acids, polyamines, nucleotides), sex pheromones (sex steroids, prostaglandins [PGs]), and a putative social cue (bile acids). Sixty-one OSNs were chemosensitive, with over half of these (36) responding to amino acids, 7 to polyamines, 7 to nucleotides, 5 to bile acids, 9 to PGs, and 7 to sex steroids. Approximately a quarter of the amino acid-sensitive units also responded to polyamines or nucleotides. Three of 6 amino acid-sensitive units responded to more than 1 amino acid compound, and 5 sex pheromone-sensitive units detected just 1 sex pheromone. While pheromone-sensitive OSNs also responded to the adenylyl cyclase activator, forskolin, amino acid-sensitive OSNs responded to either forskolin or a phospholipase C activator, imipramine. Most OSNs responded to odorants and activators with excitation. Our results suggest that pheromone information is encoded by OSNs specifically tuned to single sex pheromones and employ adenylyl cyclase, suggestive of a labeled-line organization, while food information is encoded by a combination of OSNs that use both adenylyl cyclase and phospholipase C and are often less specifically tuned" |
| Keywords: | Action Potentials/*drug effects Amino Acids/chemistry/pharmacology Animals Colforsin/chemistry/pharmacology Food Analysis Goldfish/*physiology Male Nucleotides/chemistry/pharmacology Odorants/analysis Olfactory Receptor Neurons/drug effects/*physiology Po; |
| Notes: | "MedlineSato, Koji Sorensen, Peter W eng Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't England 2018/03/08 Chem Senses. 2018 Apr 23; 43(4):249-260. doi: 10.1093/chemse/bjy016" |
