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The Future of Neurotoxicology: A Neuroelectrophysiological Viewpoint. | LitMetric

The Future of Neurotoxicology: A Neuroelectrophysiological Viewpoint.

Front Toxicol

Neurological and Endocrine Toxicology Branch, Public Health and Integrated Toxicology Division, CPHEA/ORD, U.S. Environmental Protection Agency, Washington, NC, United States.

Published: December 2021

AI Article Synopsis

  • - Neuroelectrophysiology is a historical field that started in the 18th century, leading to various techniques for studying nerve activity and enabling assessments of complex functions like sensory perception and muscle control in both humans and animal models.
  • - The research highlights the importance of understanding the connections between cellular changes and overall nervous system function, as there are gaps that hinder a complete understanding of neurological issues.
  • - Building Adverse Outcome Pathways (AOPs) will help identify critical brain regions and neurotransmitters involved in negative outcomes, emphasizing the need for integrated strategies and advanced techniques to study brain functions and their interactions in real time.

Article Abstract

Neuroelectrophysiology is an old science, dating to the 18th century when electrical activity in nerves was discovered. Such discoveries have led to a variety of neurophysiological techniques, ranging from basic neuroscience to clinical applications. These clinical applications allow assessment of complex neurological functions such as (but not limited to) sensory perception (vision, hearing, somatosensory function), and muscle function. The ability to use similar techniques in both humans and animal models increases the ability to perform mechanistic research to investigate neurological problems. Good animal to human homology of many neurophysiological systems facilitates interpretation of data to provide cause-effect linkages to epidemiological findings. Mechanistic cellular research to screen for toxicity often includes gaps between cellular and whole animal/person neurophysiological changes, preventing understanding of the complete function of the nervous system. Building Adverse Outcome Pathways (AOPs) will allow us to begin to identify brain regions, timelines, neurotransmitters, etc. that may be Key Events (KE) in the Adverse Outcomes (AO). This requires an integrated strategy, from to (and hypothesis generation, testing, revision). Scientists need to determine intermediate levels of nervous system organization that are related to an AO and work both upstream and downstream using mechanistic approaches. Possibly more than any other organ, the brain will require networks of pathways/AOPs to allow sufficient predictive accuracy. Advancements in neurobiological techniques should be incorporated into these AOP-base neurotoxicological assessments, including interactions between many regions of the brain simultaneously. Coupled with advancements in optogenetic manipulation, complex functions of the nervous system (such as acquisition, attention, sensory perception, etc.) can be examined in real time. The integration of neurophysiological changes with changes in gene/protein expression can begin to provide the mechanistic underpinnings for biological changes. Establishment of linkages between changes in cellular physiology and those at the level of the AO will allow construction of biological pathways (AOPs) and allow development of higher throughput assays to test for changes to critical physiological circuits. To allow mechanistic/predictive toxicology of the nervous system to be protective of human populations, neuroelectrophysiology has a critical role in our future.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8711081PMC
http://dx.doi.org/10.3389/ftox.2021.729788DOI Listing

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