Cited by 80Posttraumatic Stress Disorder ResearchFunctional Brain Connectivity StudiesTraumatic Brain Injury Research

STRUCTURAL AND FUNCTIONAL CONNECTIVITY IN POSTTRAUMATIC STRESS DISORDER: ASSOCIATIONS WITH FKBP5: 2015 Donald F Klein Investigator Award Finalist: Connectivity, PTSD, and FKBP5

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Fani, Negar, King, Tricia Z., Shin, Jaemin, Srivastava, Amita, Brewster, Ryan C., Jovanovic, Tanja, Bradley, Bekh, Ressler, Kerry J.·2016·Depression and Anxiety

Abstract

BACKGROUND: The integrity of connections between the hippocampus and the anterior cingulate cortex (ACC) is critical for adaptive cognitive and emotional processing; these connections may be compromised in posttraumatic stress disorder (PTSD). However, there is a lack of PTSD research that combines structural and functional connectivity data, and no studies have examined whether abnormal ACC-hippocampal connectivity is associated with genetic variability, particularly for polymorphisms of a gene that has been previously associated with PTSD, FKBP5. This was the goal of the present study. METHODS: Fifty-four women with and without PTSD underwent diffusion tensor imaging and resting-state MRI. Probabilistic tractography was used to examine ACC-hippocampal structural connectivity; mean fractional anisotropy (FA) values were extracted from connectivity streamlines, which represent the cingulum bundle. Genotype data were collected for a single nucleotide polymorphism (SNP) of FKBP5, rs1360780. RESULTS: Participants with PTSD demonstrated poorer structural connectivity (lower cingulum FA) compared to traumatized controls (F1, 50 = 6.77, P < .05). An interaction of FKBP5 genotype and diagnostic group was also observed (F1, 37 = 4.52, P = .04), indicating lower cingulum FA in carriers of two risk alleles for this SNP, compared to other diagnostic and genotype groups. Carriers of two FKBP5 risk alleles also demonstrated poorer hippocampus-ACC connectivity at rest (P < .05). When cingulum FA was used a regressor in a brain-wide, seed-based regression analysis, significant associations were found between the hippocampus and dorsal regions of the ACC (P < .05). CONCLUSIONS: Individuals with PTSD demonstrated compromised structural connectivity of the hippocampus-ACC pathway. Altered hippocampus-ACC connectivity may represent a highly salient intermediate neural phenotype for PTSD.

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Crossref · 10.1002/da.22483

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  • Fani et al. found that civilians with PTSD had decreased structural connectivity via the cingulum bundle, which supports the hippocampus-dACC pathway.

    “In addition, using DTI, Fani et al. [156] found that civilians with PTSD had decreased structural connectivity via the cingulum bundle, which supports the hippocampus-dACC pathway.”

    From Prefrontal cortex, amygdala, and threat processing: implications for PTSD (2022) · cites this paper as [156]

    The Methods (Participants; DTI Data Processing and Probabilistic Tractography) describe a civilian sample and DTI-derived hippocampus–ACC tracts constrained through the cingulum. The Results report poorer cingulum connectivity in participants with PTSD than in controls, but the structural analysis identifies the ACC generally, not the dACC specifically. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Individuals with the "risk" allele of the FKBP5 genetic biomarker, associated with childhood maltreatment and PTSD risk, also had decreased cingulum structural integrity.

    “Further analyses of this cohort found that individuals with the “risk” allele of the FKBP5 genetic biomarker, associated with childhood maltreatment and PTSD risk, also had decreased cingulum structural integrity.”

    From Prefrontal cortex, amygdala, and threat processing: implications for PTSD (2022) · cites this paper as [156]

    The Results report the lowest cingulum FA in participants with PTSD who carried two FKBP5 risk alleles, compared with the other genotype and diagnostic groups. The claim broadens this to individuals with a risk allele generally. The Results also say cingulum connectivity was not significantly associated with childhood maltreatment; the passages do not establish the claimed link between this allele and childhood maltreatment. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Altered hippocampus-ACC connectivity may represent a highly salient intermediate neural phenotype for PTSD.

    “They suggest that altered hippocampus-ACC connectivity may represent a highly salient intermediate neural phenotype for PTSD.”

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Research works printed but not linked: 2

  1. [40]Smith SM Jenkinson M Woolrich MW Beckmann CF Behrens TEJ Johansen-Berg H Advances in functional and structural MR image analysis and implementation as FSL Neuroimage 2004 23 Suppl 1 S208 S219 15501092
  2. [45]Binder EB Bradley RG Liu W Epstein MP Deveau TC Mercer KB Association of FKBP5 polymorphisms and childhood abuse with risk of posttraumatic stress disorder symptoms in adults JAMA 2008 299 11 1291 1305 18349090 PMC2441757

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Authors
Fani, N., King, T. Z., Shin, J., Srivastava, A., Brewster, R. C., Jovanovic, T., Bradley, B., & Ressler, K. J.
Affiliations
  • Emory University (US)
  • Georgia State University (US)
  • Georgia Institute of Technology (US)
  • Morehouse School of Medicine (US)
  • Department of Psychiatry and Behavioral Sciences; Emory University School of Medicine; Atlanta Georgia
Corresponding author
Fani, Negar
Venue
Depression and Anxiety
Publisher
Wiley
Published
2016-04
Volume
33
Issue
4
Pages
300-307
ISSN
1091-4269 (ISSN-L)
OpenAlex
W2320359820
Cited by
80
References
54
Citations by year
2026: 5 · 2025: 7 · 2024: 5 · 2023: 4 · 2022: 6 · 2021: 7 · 2020: 15 · 2019: 12 · 2018: 4 · 2017: 11 · 2016: 4
FWCI
13.83
Type
journal article
Language
en
Open access
Locations
  • Depression and Anxiety (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health (UL1TR000454)
  • National Institute of Mental Health (K23MH101380, MH092576, R21MH098212, MH101380, MH098212, R01MH071537, R01MH094757, R21MH092576)
  • National Center for Research Resources (M01-RR00039, UL1RR025008, MH071537, P20-RR16435, P20RR016435, RR025008, M01RR000039)
  • National Center for Advancing Translational Sciences
Topics
  • Social Sciences › Psychology › Clinical Psychology › Posttraumatic Stress Disorder Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Epidemiology › Traumatic Brain Injury Research
Keywords
post-traumatic stress disorder, FKBP5, rs1360780, hippocampus, anterior cingulate cortex, cingulum, structural connectivity, functional connectivity, genetic polymorphism, fractional anisotropy, women
MeSH terms
Tacrolimus Binding Protein 5, Adult, Black or African American, Brain, Brain Mapping, Female, Genotype, Gyrus Cinguli, Hippocampus, Humans, Magnetic Resonance Imaging, Middle Aged, Stress Disorders, Post-Traumatic, Tacrolimus Binding Proteins, Cerebrum, Young Adult, Diffusion Tensor Imaging

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