Synapses are most fundamental to the function of a nervous system. C. elegans is an excellent genetic model system for finding genes and elucidating pathways because of its sequenced genome and the abundance of molecular biology tools and mutants. Due to the simplicity of its nervous system, many breakthroughs have been made in C. elegans for understanding molecular mechanisms in the patterning of the nervous system and synapse development. The current bottlenecks, however, are in the manual and non-quantitative techniques such as visual screens, often limiting both the throughput of the experiments and the phenotypes one can examine. Our long-term objective is to develop technologies to understand how genes, age, and the environment together define and continue to remodel the nervous system of an organism. Microtechnologies are ideal for studies of C. elegans neuroscience because of the relevant length scales and the possibility for automation;similarly quantitative imaging techniques are key to deciphering molecular mechanisms. The objective of this R01 project is to engineer micro devices for large-scale live imaging and quantitative imaging technologies in order to study synapse development in an in vivo system. Genes and pathways emerging from this study could potentially become targets of therapeutics in neurological disorders. We hypothesize that quantitative microscopy-based approaches can indeed enable identification of novel genes and pathways that conventional approaches cannot. The first component of this project is to develop on-chip rapid and high-content in vivo imaging techniques, and in parallel to develop algorithms and quantitative measures for the analysis of such high-content data. The second component of the project is to perform screens and studies using these novel technologies. The approach is innovative because the technology developed here dramatically increases the capabilities of existing imaging and screening tools by several orders of magnitude in speed and much more sensitive and accurate than conventional manual approaches. The proposed research is significant because it fills the urgent need in high-throughput and high-content screens as well as identifying novel genes and pathways. In addition, besides the contribution to the specific neurobiology, the technologies are widely applicable to areas such as developmental cell biology, and to other small organisms such as fly larvae and zebrafish embryos.

Public Health Relevance

Synapse development is an important and active area of research linking genes and environments to the formation and maintenance of synapses in the nervous system. It has direct implications in many human diseases such as neurodegeneration and mental illnesses.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM088333-04
Application #
8638024
Study Section
Neurotechnology Study Section (NT)
Program Officer
Deatherage, James F
Project Start
2011-04-01
Project End
2015-03-31
Budget Start
2014-04-01
Budget End
2015-03-31
Support Year
4
Fiscal Year
2014
Total Cost
$274,245
Indirect Cost
$86,245
Name
Georgia Institute of Technology
Department
Engineering (All Types)
Type
Schools of Engineering
DUNS #
097394084
City
Atlanta
State
GA
Country
United States
Zip Code
30332
Lee, Hyewon; Kim, Shin Ae; Coakley, Sean et al. (2014) A multi-channel device for high-density target-selective stimulation and long-term monitoring of cells and subcellular features in C. elegans. Lab Chip 14:4513-22
Fernandes de Abreu, Diana Andrea; Caballero, Antonio; Fardel, Pascal et al. (2014) An insulin-to-insulin regulatory network orchestrates phenotypic specificity in development and physiology. PLoS Genet 10:e1004225
Ai, Xiaoni; Zhuo, Weipeng; Liang, Qionglin et al. (2014) A high-throughput device for size based separation of C. elegans developmental stages. Lab Chip 14:1746-52
Hwang, Hyundoo; Krajniak, Jan; Matsunaga, Yohei et al. (2014) On-demand optical immobilization of Caenorhabditis elegans for high-resolution imaging and microinjection. Lab Chip 14:3498-501
Zhan, Mei; Chingozha, Loice; Lu, Hang (2013) Enabling systems biology approaches through microfabricated systems. Anal Chem 85:8882-94
Williams, Daniel C; Bejjani, Rachid El; Ramirez, Paula Mugno et al. (2013) Rapid and permanent neuronal inactivation in vivo via subcellular generation of reactive oxygen with the use of KillerRed. Cell Rep 5:553-63
Lee, Hyewon; Crane, Matthew M; Zhang, Yun et al. (2013) Quantitative screening of genes regulating tryptophan hydroxylase transcription in Caenorhabditis elegans using microfluidics and an adaptive algorithm. Integr Biol (Camb) 5:372-80
Hwang, Hyundoo; Lu, Hang (2013) Microfluidic tools for developmental studies of small model organisms--nematodes, fruit flies, and zebrafish. Biotechnol J 8:192-205
Caceres, Ivan de Carlos; Valmas, Nicholas; Hilliard, Massimo A et al. (2012) Laterally orienting C. elegans using geometry at microscale for high-throughput visual screens in neurodegeneration and neuronal development studies. PLoS One 7:e35037
Stirman, Jeffrey N; Crane, Matthew M; Husson, Steven J et al. (2011) Real-time multimodal optical control of neurons and muscles in freely behaving Caenorhabditis elegans. Nat Methods 8:153-8

Showing the most recent 10 out of 11 publications