A Circuit for Gradient Climbing in C. elegans Chemotaxis.
A Circuit for Gradient Climbing in C. elegans Chemotaxis.
复制标题
DOI:
10.1016/j.celrep.2015.08.032
复制
发表时间:
2015-09-22
期刊:
影响因子:
8.8
通讯作者:
Bargmann CI
中科院分区:
文献类型:
--
作者:
Larsch J;Flavell SW;Liu Q;Gordus A;Albrecht DR;Bargmann CI
Animals have a remarkable ability to track dynamic sensory information. For example, the nematode Caenorhabditis elegans can locate a diacetyl odor source across a 100,000-fold concentration range. Here, we relate neuronal properties, circuit implementation, and behavioral strategies underlying this robust navigation. Diacetyl responses in AWA olfactory neurons are concentration- and history-dependent; AWA integrates over time at low odor concentrations, but as concentrations rise it desensitizes rapidly through a process requiring cilia transport. After desensitization, AWA retains sensitivity to small odor increases. The downstream AIA interneuron amplifies weak odor inputs and desensitizes further, resulting in a stereotyped response to odor increases over three orders of magnitude. The AWA-AIA circuit drives asymmetric behavioral responses to odor increases that facilitate gradient climbing. The adaptation-based circuit motif embodied by AWA and AIA shares computational properties with bacterial chemotaxis and the vertebrate retina, each providing a solution for maintaining sensitivity across a dynamic range.
登录
查看更多内容
影响因子:
64.5
作者:
BARGMANN, CI;HARTWIEG, E;HORVITZ, HR
通讯作者:
HORVITZ, HR
影响因子:
16.2
作者:
Ke JB;Wang YV;Borghuis BG;Cembrowski MS;Riecke H;Kath WL;Demb JB;Singer JH
通讯作者:
Singer JH
影响因子:
5.3
作者:
Iino, Yuichi;Yoshida, Kazushi
通讯作者:
Yoshida, Kazushi
DOI:
10.1007/s11068-008-9029-4
发表时间:
2008-08-01
期刊:
BRAIN CELL BIOLOGY
影响因子:
--
作者:
Hires, S. Andrew;Tian, Lin;Looger, Loren L.
通讯作者:
Looger, Loren L.
影响因子:
16.2
作者:
Kato S;Xu Y;Cho CE;Abbott LF;Bargmann CI
通讯作者:
Bargmann CI