| Title: | Learned recognition of maternal signature odors mediates the first suckling episode in mice |
| Author(s): | Logan DW; Brunet LJ; Webb WR; Cutforth T; Ngai J; Stowers L; |
| Address: | "Department of Cell Biology, The Scripps Research Institute, La Jolla, CA 92037, USA" |
| DOI: | 10.1016/j.cub.2012.08.041 |
| ISSN/ISBN: | 1879-0445 (Electronic) 0960-9822 (Print) 0960-9822 (Linking) |
| Abstract: | "BACKGROUND: Soon after birth, all mammals must initiate milk suckling to survive. In rodents, this innate behavior is critically dependent on uncharacterized maternally derived chemosensory ligands. Recently, the first pheromone sufficient to initiate suckling was isolated from the rabbit. Identification of the olfactory cues that trigger first suckling in the mouse would provide the means to determine the neural mechanisms that generate innate behavior. RESULTS: Here we use behavioral analysis, metabolomics, and calcium imaging of primary sensory neurons and find no evidence of ligands with intrinsic bioactivity, such as pheromones, acting to promote first suckling in the mouse. Instead, we find that the initiation of suckling is dependent on variable blends of maternal 'signature odors' that are learned and recognized prior to first suckling. CONCLUSIONS: As observed with pheromone-mediated behavior, the response to signature odors releases innate behavior. However, this mechanism tolerates variability in both the signaling ligands and sensory neurons, which may maximize the probability that this first essential behavior is successfully initiated. These results suggest that mammalian species have evolved multiple strategies to ensure the onset of this critical behavior" |
| Keywords: | "Amniotic Fluid/chemistry Animals Animals, Suckling/*physiology Behavior, Animal Cesarean Section Cues Cyclic Nucleotide-Gated Cation Channels/genetics Female Lactation/physiology Learning Metabolomics Mice Mice, Inbred BALB C Mice, Inbred C57BL Mice, Knoc;" |
| Notes: | "MedlineLogan, Darren W Brunet, Lisa J Webb, William R Cutforth, Tyler Ngai, John Stowers, Lisa eng WT_/Wellcome Trust/United Kingdom R01 DC006885/DC/NIDCD NIH HHS/ R01 DC009413/DC/NIDCD NIH HHS/ 098051/WT_/Wellcome Trust/United Kingdom Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't England 2012/10/09 Curr Biol. 2012 Nov 6; 22(21):1998-2007. doi: 10.1016/j.cub.2012.08.041. Epub 2012 Oct 4" |
