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Yair Shemesh, Alon Chen
Mental disorders are a significant cause of disability worldwide. They profoundly affect individuals' well-being and impose a substantial financial burden on societies and governments. However, despite decades of extensive research, the effectiveness of current therapeutics for mental disorders is often not satisfactory or well tolerated by the patient. Moreover, most novel therapeutic candidates fail in clinical testing during the most expensive phases (II and III), which results in the withdrawal of pharma companies from investing in the field. It also brings into question the effectiveness of using animal models in preclinical studies to discover new therapeutic agents and predict their potential for treating mental illnesses in humans. Here, we focus on rodents as animal models and propose that they are essential for preclinical investigations of candidate therapeutic agents' mechanisms of action and for testing their safety and efficiency. Nevertheless, we argue that there is a need for a paradigm shift in the methodologies used to measure animal behavior in laboratory settings. Specifically, behavioral readouts obtained from short, highly controlled tests in impoverished environments and social contexts as proxies for complex human behavioral disorders might be of limited face validity. Conversely, animal models that are monitored in more naturalistic environments over long periods display complex and ethologically relevant behaviors that reflect evolutionarily conserved endophenotypes of translational value. We present how semi-natural setups in which groups of mice are individually tagged, and video recorded continuously can be attainable and affordable. Moreover, novel open-source machine-learning techniques for pose estimation enable continuous and automatic tracking of individual body parts in groups of rodents over long periods. The trajectories of each individual animal can further be subjected to supervised machine learning algorithms for automatic detection of specific behaviors (e.g., chasing, biting, or fleeing) or unsupervised automatic detection of behavioral motifs (e.g., stereotypical movements that might be harder to name or label manually). Compared to studies of animals in the wild, semi-natural environments are more compatible with neural and genetic manipulation techniques. As such, they can be used to study the neurobiological mechanisms underlying naturalistic behavior. Hence, we suggest that such a paradigm possesses the best out of classical ethology and the reductive behaviorist approach and may provide a breakthrough in discovering new efficient therapies for mental illnesses.
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Shemesh, Y., & Chen, A. (2023). A paradigm shift in translational psychiatry through rodent neuroethology. Molecular Psychiatry, 28(3), 993–1003. https://doi.org/10.1038/s41380-022-01913-z
Shemesh, Yair, and Alon Chen. "A paradigm shift in translational psychiatry through rodent neuroethology." Molecular Psychiatry, vol. 28, no. 3, 2023, pp. 993–1003, https://doi.org/10.1038/s41380-022-01913-z.
Shemesh, Yair, and Alon Chen. "A paradigm shift in translational psychiatry through rodent neuroethology." Molecular Psychiatry 28, no. 3 (2023): 993–1003. https://doi.org/10.1038/s41380-022-01913-z.
Shemesh Y., Chen A. A paradigm shift in translational psychiatry through rodent neuroethology // Molecular Psychiatry. — 2023. — Vol. 28, № 3. — P. 993–1003. — URL: https://doi.org/10.1038/s41380-022-01913-z
@article{shemesh2023paradigm,
title = {{A paradigm shift in translational psychiatry through rodent neuroethology}},
author = {Yair Shemesh and Alon Chen},
journal = {Molecular Psychiatry},
year = {2023},
volume = {28},
number = {3},
pages = {993--1003},
doi = {10.1038/s41380-022-01913-z},
url = {https://doi.org/10.1038/s41380-022-01913-z}
}TY - JOUR AU - Shemesh, Yair AU - Chen, Alon TI - A paradigm shift in translational psychiatry through rodent neuroethology JO - Molecular Psychiatry VL - 28 IS - 3 SP - 993 EP - 1003 PY - 2023 DA - 2023/01/12 DO - 10.1038/s41380-022-01913-z UR - https://doi.org/10.1038/s41380-022-01913-z ER -
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