All animals live in constantly changing environments and are, therefore, subjected to fluctuations in critical environmental cues such as temperature. Given that all biochemical reactions are temperature sensitive to a certain extent, it is particularly critical for animals to compensate for these temperature changes in order to maintain steady internal conditions. In order to do so, animals must be able to detect small temperature changes and then trigger the appropriate homeostatic compensatory mechanisms. To date, research into the molecular and neuronal basis of temperature detection and thermotransduction, and the physiological mechanisms of temperature adaptation and compensation, have largely been pursued as independent lines of investigation. To obtain a full understanding of how animals respond appropriately to temperature changes, these intellectual issues must be brought together and studied as a whole. In this Program Project grant we bring together researchers experienced in issues of temperature detection and temperature compensation to ask how animals detect temperature changes and translate this information to effect compensatory changes in neuron function to maintain behavioral robustness. A particular strength of this proposal is the synergy among investigators exploring these issues in multiple systems;this diversity will elucidate common underlying principles that can be generalized ID other species. The overall questions being asked here are: 1) What are the molecular mechanisms by which animals detect temperature changes? 2) What are the neuronal mechanisms that encode information about temperature changes? 3) How do motor programs compensate for temperature fluctuations? 4) What defines the limits of the range in which these homeostatic mechanisms operate? 5) What are the common principles of temperature detection and compensation among species?
Like cold-blooded animals, warm-blooded animals are also susceptible to the effects of alterations in their ability to correctly sense and compensate for temperature changes. 'Crashes'of nervous system function occur when compensation mechanisms fail. Understanding the limits of compensatory mechanisms will inform our understanding of critical medical issues such as febrile seizures, Uhthoff's phenomenon in multiple sclerosis, psychomotor stimulant drug-induced hypothermia and familial episodic pain syndrome among others.
|Berck, Matthew E; Khandelwal, Avinash; Claus, Lindsey et al. (2016) The wiring diagram of a glomerular olfactory system. Elife 5:|
|Takeishi, Asuka; Yu, Yanxun V; Hapiak, Vera M et al. (2016) Receptor-type Guanylyl Cyclases Confer Thermosensory Responses in C.Â elegans. Neuron 90:235-44|
|Knecht, Zachary A; Silbering, Ana F; Ni, Lina et al. (2016) Distinct combinations of variant ionotropic glutamate receptors mediate thermosensation and hygrosensation in Drosophila. Elife 5:|
|Venkatachalam, Vivek; Ji, Ni; Wang, Xian et al. (2016) Pan-neuronal imaging in roaming Caenorhabditis elegans. Proc Natl Acad Sci U S A 113:E1082-8|
|Ni, Lina; Klein, Mason; Svec, Kathryn V et al. (2016) The Ionotropic Receptors IR21a and IR25a mediate cool sensing in Drosophila. Elife 5:|
|Head, Lauren M; Tang, Xin; Hayley, Sean E et al. (2015) The influence of light on temperature preference in Drosophila. Curr Biol 25:1063-8|
|Barbagallo, Belinda; Garrity, Paul A (2015) Temperature sensation in Drosophila. Curr Opin Neurobiol 34:8-13|
|Hernandez-Nunez, Luis; Belina, Jonas; Klein, Mason et al. (2015) Reverse-correlation analysis of navigation dynamics in Drosophila larva using optogenetics. Elife 4:|
|Neal, Scott J; Takeishi, Asuka; O'Donnell, Michael P et al. (2015) Feeding state-dependent regulation of developmental plasticity via CaMKI and neuroendocrine signaling. Elife 4:|
|Klein, Mason; Afonso, Bruno; Vonner, Ashley J et al. (2015) Sensory determinants of behavioral dynamics in Drosophila thermotaxis. Proc Natl Acad Sci U S A 112:E220-9|
Showing the most recent 10 out of 13 publications