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    Breaking News

    Pitt Engineer Awarded $390K to Develop Imaging Tech to Improve Brain Implant Design

    Imaging technology to investigate the role of oligodendrocytes & oligodendrocyte progenitor cells on chronic brain implants.

    Pitt Engineer Awarded $390K to Develop Imaging Tech to Improve Brain Implant Design
    OPC activation around Chronic Brain Implant (center): OPC (green), microglia (red), astrocyte (white), and cell nuclei (blue). Scalebar = 100 microns. Image courtesy of Steven Wellman and Lehong Li.
    University of Pittsburgh07.20.18
    Chronic brain implants are long-term devices used to record brain activity or stimulate neurons with electrical pulses and are a crucial component of neuroprosthetics. The performance of these devices depends on the host tissue response, which is often inflammatory and results in device performance degradation. Takashi Kozai, assistant professor of bioengineering at the University of Pittsburgh Swanson School of Engineering, was awarded an NIH R21 grant to improve device design by investigating the role of oligodendrocytes and oligodendrocyte progenitor cells in this process.
     
    Kozai will work with Franca Cambi, professor of neurology at Pitt, to develop in vivo imaging technology that will explore how these cells cause negative tissue response to chronic brain implants. Supported by the NIH's National Institute of Neurological Disorders and Stroke, Kozai and Cambi received a two-year, $386,645 award for their research.
     
    Kozai and his collaborators recently published work that reveals the importance of the brain's glial cells. Oligodendrocytes and oligodendrocyte progenitor cells (OPCs) are a type of glia or connective tissue in the central nervous system that play an important role in brain injury and neuronal activity, including the body's response to brain implants.
     
    Oligodendrocytes are crucial for normal signaling in the brain. They produce proteins that help neurons grow, form synapses, and may even help neurons survive traumatic injuries. They play a key role in myelination, a process where oligodendrocytes wrap a fatty substance around the neuron's axon to help insulate electrical signals and allow neural signals to move more rapidly.
     
    "Oligodendrocytes, like neurons, consume enormous amounts of energy," explained Kozai. "Neurons require the energy to maintain membrane potential, while oligodendrocytes require energy to maintain high production levels of protein and lipids. As a result, oligodendrocytes and neurons are one of the first cell types to die following brain injury."
     
    "Because the oligodendrocytes provide growth factors and support for neurons, the idea is maybe if we can help to oligodendrocytes to survive after injury, they can, in turn, help the neurons to survive," said Kozai.
     
    They plan to apply a similar logic to OPCs, which are a subtype of glia that are of particular interest because they have the capacity to differentiate into oligodendrocytes, astrocytes, or neurons during tissue repair. Kozai said, "If we can maintain a healthy environment for OPCs, maybe they can help replenish the oligodendrocyte and neuronal population, instead of turning into scar tissue forming astrocytes."
     
    Kozai and Cambi hope to gain insight by getting a more detailed look at the life span of these cells using multiphoton imaging and neural engineering technology. Kozai said, "Much of the work on oligodendrocytes and OPCs has been carried out with post-mortem immunohistochemistry and molecular assays in disease models. As such, we only get a snapshot of the dead cells in their last moments, instead of seeing how and when they got there so that we can identify when and where to apply treatments and employ intervention strategies."
     
    By using in vivo imaging techniques like multiphoton imaging and pinpointing brain injury using neural engineering technology, Kozai and Cambi can map out the spatiotemporal relationships between oligodendrocyte loss, neuronal cell death, and OPC tissue repair and identify targets for intervention strategies, not just for brain implants, but also many neurodegenerative diseases.

    Find more information on the study here.
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