Abstract
Resilience is a neurobiological entity that shapes an individual’s response to trauma. Resilience has been implicated as the principal mediator in the development of mental illness following exposure to trauma. Although animal models have traditionally defined resilience as molecular and behavioral changes in stress responsive circuits following trauma, this concept needs to be further clarified for both research and clinical use. Here, we analyze the construct of resilience from a translational perspective and review optimal measurement methods and models. We also seek to distinguish between resilience, stress vulnerability, and posttraumatic growth. We propose that resilience can be quantified as a multifactorial determinant of physiological parameters, epigenetic modulators, and neurobiological candidate markers. This multifactorial definition can determine PTSD risk before and after trauma exposure. From this perspective, we propose the use of an ‘R Factor’ analogous to Spearman’s g factor for intelligence to denote these multifactorial determinants. In addition, we also propose a novel concept called ‘resilience reserve’, analogous to Stern’s cognitive reserve, to summarize the sum total of physiological processes that protect and compensate for the effect of trauma. We propose the development and application of challenge tasks to measure ‘resilience reserve’ and guide the assessment and monitoring of ‘R Factor’ as a biomarker for PTSD.
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Acknowledgements
We thank Emily K Clarke, Senior Clinical Research Specialist, Duke-UNC Brain Imaging and Analysis Center, Duke University School of Medicine for help with editing and proof-reading the manuscript. The authors report the following sources of support for their time working on this project: U.S. Department of Veterans Affairs grant IK2CX001397 (STS), I01CX001569 and I01CX001277 (CEM), I01CX000748 (RAM); National Institute of Mental Health (NIMH) grant R01MH111671 (RAM), National Institute of Neurological Disorders and Stroke (NINDS) R01NS086885 (RAM). The views expressed in this article are those of the authors and do not necessarily reflect the position or policy of the Department of Veterans Affairs or the United States Government.
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STS has served on the advisory board for Jazz Pharmaceuticals, and as a consultant speaker for Neurocrine Biosciences, Teva Pharmaceutical Industries Ltd, and Otsuka/Lundbeck Pharmaceuticals. CEM is a co-applicant on pending patents focusing on neurosteroids in CNS disorders (no patents issued; no licensing in place; VA 208 waiver in place). All the remaining authors declare that they have no conflict of interest.
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Rakesh, G., Morey, R.A., Zannas, A.S. et al. Resilience as a translational endpoint in the treatment of PTSD. Mol Psychiatry 24, 1268–1283 (2019). https://doi.org/10.1038/s41380-019-0383-7
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DOI: https://doi.org/10.1038/s41380-019-0383-7
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