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Research of zebrafish neurons may lead to understanding of birth defects like spina bifida
Date:2/18/2014

COLUMBIA, Mo. The zebrafish, a tropical freshwater fish similar to a minnow and native to the southeastern Himalayan region, is well established as a key tool for researchers studying human diseases, including brain disorders. Using zebrafish, scientists can determine how individual neurons develop, mature and support basic functions like breathing, swallowing and jaw movement. Researchers at the University of Missouri say that learning about neuronal development and maturation in zebrafish could lead to a better understanding of birth defects such as spina bifida in humans.

"We are studying how neurons move to their final destinations," said Anand Chandrasekhar, professor of biological sciences and a researcher in the Bond Life Sciences Center at MU. "It's especially critical in the nervous system because these neurons are generating circuits similar to what you might see in computers. If those circuits don't form properly, and if different types of neurons don't end up in the right locations, the behavior and survival of the animal will be compromised."

The scientists studied zebrafish embryos, which are nearly transparent, making internal processes easy to observe. Using modified zebrafish expressing green fluorescent jellyfish protein, Chandrasekhar and his team were able to track neuronal migration.

"This approach is used extensively to visualize a group of cells," Chandrasekhar said. "In our study, clusters of green cells glowed and indicated where motor neurons were located in the brain. Some groupings are shaped like sausages while others are round, but each cluster of 50 to150 cells sends out signals to different groups of jaw muscles."

These motor neurons that Chandrasekhar studied are located in the hindbrain, which corresponds to the human brainstem and controls gill and jaw movement in these tiny fish. Genes controlling the development and organization of these neurons in zebrafish are functionally similar t
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Contact: Jeff Sossamon
573-882-3346
University of Missouri-Columbia
Source:Eurekalert  

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