한빛사논문
Hyunsoo Yim 1,7, Daniel T. Choe 1,7, J. Alexander Bae 2,7, Myung-kyu Choi 2, Hae-Mook Kang 2, Ken C. Q. Nguyen 3, Soungyub Ahn 1, Sang-kyu Bahn 4,6, Heeseung Yang 1, David H. Hall 3, Jinseop S. Kim 4,5,* & Junho Lee 1,2,*
1Department of Biological Sciences, Seoul National University, Seoul 08826, South Korea.
2Research Institute of Basic Sciences, Seoul National University, Seoul 08826, South Korea.
3Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
4Neural Circuits Research Group, Korea Brain Research Institute, Daegu 41062, South Korea.
5Department of Biological Sciences, Sungkyunkwan University, Suwon-si, Gyeonggi-do 16419, South Korea.
6Present address: Cognitive Science Research Group, Korea Brain Research Institute, Daegu 41062, South Korea.
7These authors contributed equally: Hyunsoo Yim, Daniel T. Choe, J. Alexander Bae.
*Corresponding authors: correspondence to Jinseop S. Kim or Junho Lee
Abstract
A fundamental question in neurodevelopmental biology is how flexibly the nervous system changes during development. To address this, we reconstructed the chemical connectome of dauer, an alternative developmental stage of nematodes with distinct behavioral characteristics, by volumetric reconstruction and automated synapse detection using deep learning. With the basic architecture of the nervous system preserved, structural changes in neurons, large or small, were closely associated with connectivity changes, which in turn evoked dauer-specific behaviors such as nictation. Graph theoretical analyses revealed significant dauer-specific rewiring of sensory neuron connectivity and increased clustering within motor neurons in the dauer connectome. We suggest that the nervous system in the nematode has evolved to respond to harsh environments by developing a quantitatively and qualitatively differentiated connectome.
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