B.J. Casey, Charles E. Glatt, Francis S. Lee  Neuron 

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Treating the Developing versus Developed Brain: Translating Preclinical Mouse and Human Studies  B.J. Casey, Charles E. Glatt, Francis S. Lee  Neuron  Volume 86, Issue 6, Pages 1358-1368 (June 2015) DOI: 10.1016/j.neuron.2015.05.020 Copyright © 2015 Elsevier Inc. Terms and Conditions

Figure 1 Developmental Emergence of Mental Disorders Based on data from Kessler et al. (2005) and Kessler and Wang (2008). ADHD, attention deficit hyperactivity disorder; Schiz, schizophrenia. Neuron 2015 86, 1358-1368DOI: (10.1016/j.neuron.2015.05.020) Copyright © 2015 Elsevier Inc. Terms and Conditions

Figure 2 Development of Cued Fear Extinction Parallels Clinical Response to Cognitive Behavioral Therapy in Anxiety Disorders (A) Reduced fear extinction learning in both mice and humans during adolescence (Pattwell et al., 2012b). ∗, adolescent extinction is significantly less than childhood and adulthood extinction. (B) Diminished treatment response during adolescence based on data from the CAMS (Walkup et al., 2008), subdivided by developmental stage. Adolescents show a nonsignificant decrease in responsiveness to cognitive behavioral therapy (Drysdale et al., 2014). All results are presented as means ± SEM. Neuron 2015 86, 1358-1368DOI: (10.1016/j.neuron.2015.05.020) Copyright © 2015 Elsevier Inc. Terms and Conditions

Figure 3 Cross-Species Approach to Individual Variation in Behavior Introducing common genetic polymorphisms into the mouse genome supports parallel studies of brain structure and function using species-specific techniques across levels of biology. Polymorphic effects on conserved behaviors cross-validate and refine results from each species. Analysis of gene × development interactions can be identified in mice, and specific hypotheses can be tested in humans. Neuron 2015 86, 1358-1368DOI: (10.1016/j.neuron.2015.05.020) Copyright © 2015 Elsevier Inc. Terms and Conditions

Figure 4 Developmental Expression of BDNF and Components of the Endocannabinoid System in the Brain Both systems peak in adolescence and may contribute to unique attributes of fear learning during this stage. The effects of BDNF Val66Met (A) and FAAH C385A (B) across development are presented as dotted lines. Neuron 2015 86, 1358-1368DOI: (10.1016/j.neuron.2015.05.020) Copyright © 2015 Elsevier Inc. Terms and Conditions

Figure 5 Individual Variation in Cued Fear Extinction Learning (A) Extinction learning is attenuated in humans with the BNDF Met (M) allele relative to the non-Met allele(V), as measured by the change in galvanic skin response. ∗∗p < 0.01. (B) This finding is paralleled in BDNF SNP knockin mice, measured by less change in freezing behavior with repeated presentation of the conditioned stimulus alone during extinction trials ∗p < 0.05 (VV versus VM/MM). Adapted with permission from Soliman et al. (2010). (C) Extinction learning is enhanced in humans with the FAAH A allele relative to the C allele, as measured by a greater change in galvanic skin response. ∗p < 0.05 (D) This finding is paralleled in FAAH SNP knockin mice, measured by decreased freezing behavior with repeated presentation of the conditioned stimulus alone during extinction trials. ∗∗p < 0.01 homozygous knockin mice versus wild-type controls; p < 0.05 heterozygotes versus wild-type. Adapted with permission from Dincheva et al. (2015). All results are presented as means ± SEM. Neuron 2015 86, 1358-1368DOI: (10.1016/j.neuron.2015.05.020) Copyright © 2015 Elsevier Inc. Terms and Conditions

Figure 6 Diminishing Need for Prefrontally Mediated Extinction to Reduce Fear Memory in Adolescents (A and B) In adolescence, acquisition of cued-fear associations is similar (A) to adults (∗p < 0.05 early versus late trials), but (B) extinction is diminished (difference in early versus late extinction trials reduced ∗p < 0.05) potentially contributing to the risk for anxiety disorders and response to treatment. (C) Extinction of fear associations during reconsolidation can reduce fear memories in adolescents similar to adults (difference in fear response with versus without reminder cue, p < 0.05) between suggesting that adding reconsolidation to exposure-based therapy for adolescents might improve clinical response. Adapted with permission from Johnson and Casey (2015). All results are presented as means ± SEM. Neuron 2015 86, 1358-1368DOI: (10.1016/j.neuron.2015.05.020) Copyright © 2015 Elsevier Inc. Terms and Conditions