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Osadchiy V, Mayer EA, Bhatt R, Labus JS, Gao L, Kilpatrick LA, Liu C, Tillisch K, Naliboff B, Chang L, Gupta A. History of early life adversity is associated with increased food addiction and sex-specific alterations in reward network connectivity in obesity. Obes Sci Pract 2019; 5:416-436. [PMID: 31687167 PMCID: PMC6819979 DOI: 10.1002/osp4.362] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 07/17/2019] [Accepted: 07/18/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Neuroimaging studies have identified obesity-related differences in the brain's resting state activity. An imbalance between homeostatic and reward aspects of ingestive behaviour may contribute to obesity and food addiction. The interactions between early life adversity (ELA), the reward network and food addiction were investigated to identify obesity and sex-related differences, which may drive obesity and food addiction. METHODS Functional resting state magnetic resonance imaging was acquired in 186 participants (high body mass index [BMI]: ≥25: 53 women and 54 men; normal BMI: 18.50-24.99: 49 women and 30 men). Participants completed questionnaires to assess ELA (Early Traumatic Inventory) and food addiction (Yale Food Addiction Scale). A tripartite network analysis based on graph theory was used to investigate the interaction between ELA, brain connectivity and food addiction. Interactions were determined by computing Spearman rank correlations, thresholded at q < 0.05 corrected for multiple comparisons. RESULTS Participants with high BMI demonstrate an association between ELA and food addiction, with reward regions playing a role in this interaction. Among women with high BMI, increased ELA was associated with increased centrality of reward and emotion regulation regions. Men with high BMI showed associations between ELA and food addiction with somatosensory regions playing a role in this interaction. CONCLUSIONS The findings suggest that ELA may alter brain networks, leading to increased vulnerability for food addiction and obesity later in life. These alterations are sex specific and involve brain regions influenced by dopaminergic or serotonergic signalling.
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Affiliation(s)
- V. Osadchiy
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- David Geffen School of MedicineUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - E. A. Mayer
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- David Geffen School of MedicineUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Ahmanson‐Lovelace Brain Mapping CenterUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - R. Bhatt
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Pediatric Pain and Palliative Care ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - J. S. Labus
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- David Geffen School of MedicineUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - L. Gao
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - L. A. Kilpatrick
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- David Geffen School of MedicineUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - C. Liu
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- David Geffen School of MedicineUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - K. Tillisch
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- David Geffen School of MedicineUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Pediatric Pain and Palliative Care ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - B. Naliboff
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- David Geffen School of MedicineUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - L. Chang
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- David Geffen School of MedicineUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
| | - A. Gupta
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity ProgramUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- David Geffen School of MedicineUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUniversity of California, Los Angeles (UCLA)Los AngelesCAUSA
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Coveleskie K, Kilpatrick LA, Gupta A, Stains J, Connolly L, Labus JS, Sanmiguel C, Mayer EA. The effect of the GLP-1 analogue Exenatide on functional connectivity within an NTS-based network in women with and without obesity. Obes Sci Pract 2017; 3:434-445. [PMID: 29259802 PMCID: PMC5729499 DOI: 10.1002/osp4.124] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 01/05/2023] Open
Abstract
Objective The differential effect of GLP-1 agonist Exenatide on functional connectivity of the nucleus tractus solitaries (NTS), a key region associated with homeostasis, and on appetite-related behaviours was investigated in women with normal weight compared with women with obesity. Methods Following an 8-h fast, 19 female subjects (11 lean, 8 obese) participated in a 2-d double blind crossover study. Subjects underwent functional magnetic resonance imaging at fast and 30-min post subcutaneous injection of 5 μg of Exenatide or placebo. Functional connectivity was examined with the NTS. Drug-induced functional connectivity changes within and between groups and correlations with appetite measures were examined in a region of interest approach focusing on the thalamus and hypothalamus. Results Women with obesity reported less hunger after drug injection. Exenatide administration increased functional connectivity of the left NTS with the left thalamus and hypothalamus in the obese group only and increased the correlation between NTS functional connectivity and hunger scores in all subjects, but more so in the obese. Conclusions Obesity can impact the effects of Exenatide on brain connectivity, specifically in the NTS and is linked to changes in appetite control. This has implications for the use of GLP-1 analogues in therapeutic interventions.
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Affiliation(s)
- K. Coveleskie
- G Oppenheimer Center for Neurobiology of Stress and Resilience, Ingestive Behavior & Obesity ProgramUCLALos AngelesCAUSA
| | - L. A. Kilpatrick
- G Oppenheimer Center for Neurobiology of Stress and Resilience, Ingestive Behavior & Obesity ProgramUCLALos AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUCLALos AngelesCAUSA
- David Geffen School of MedicineUniversity of California Los Angeles (UCLA)Los AngelesCAUSA
| | - A. Gupta
- G Oppenheimer Center for Neurobiology of Stress and Resilience, Ingestive Behavior & Obesity ProgramUCLALos AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUCLALos AngelesCAUSA
- David Geffen School of MedicineUniversity of California Los Angeles (UCLA)Los AngelesCAUSA
| | - J. Stains
- G Oppenheimer Center for Neurobiology of Stress and Resilience, Ingestive Behavior & Obesity ProgramUCLALos AngelesCAUSA
| | - L. Connolly
- David Geffen School of MedicineUniversity of California Los Angeles (UCLA)Los AngelesCAUSA
| | - J. S. Labus
- G Oppenheimer Center for Neurobiology of Stress and Resilience, Ingestive Behavior & Obesity ProgramUCLALos AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUCLALos AngelesCAUSA
- David Geffen School of MedicineUniversity of California Los Angeles (UCLA)Los AngelesCAUSA
| | - C. Sanmiguel
- G Oppenheimer Center for Neurobiology of Stress and Resilience, Ingestive Behavior & Obesity ProgramUCLALos AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUCLALos AngelesCAUSA
- David Geffen School of MedicineUniversity of California Los Angeles (UCLA)Los AngelesCAUSA
| | - E. A. Mayer
- G Oppenheimer Center for Neurobiology of Stress and Resilience, Ingestive Behavior & Obesity ProgramUCLALos AngelesCAUSA
- Vatche and Tamar Manoukin Division of Digestive DiseasesUCLALos AngelesCAUSA
- Ahmanson‐Lovelace Brain Mapping CenterUCLALos AngelesCAUSA
- David Geffen School of MedicineUniversity of California Los Angeles (UCLA)Los AngelesCAUSA
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Connolly L, Coveleskie K, Kilpatrick LA, Labus JS, Ebrat B, Stains J, Jiang Z, Tillisch K, Raybould HE, Mayer EA. Differences in brain responses between lean and obese women to a sweetened drink. Neurogastroenterol Motil 2013; 25:579-e460. [PMID: 23566308 PMCID: PMC4114731 DOI: 10.1111/nmo.12125] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 02/14/2013] [Indexed: 01/14/2023]
Abstract
BACKGROUND Ingestion of sweet food is driven by central reward circuits and restrained by endocrine and neurocrine satiety signals. The specific influence of sucrose intake on central affective and reward circuitry and alterations of these mechanisms in the obese are incompletely understood. For this, we hypothesized that (i) similar brain regions are engaged by the stimulation of sweet taste receptors by sucrose and by non-nutrient sweeteners and (ii) during visual food-related cues, obese subjects show greater brain responses to sucrose compared with lean controls. METHODS In a double-blind, crossover design, 10 obese and 10 lean healthy females received a sucrose or a non-nutrient sweetened beverage prior to viewing food or neutral images. BOLD signal was measured using a 1.5 Tesla MRI scanner. KEY RESULTS Viewing food images after ingestion of either drink was associated with engagement of similar brain regions (amygdala, hippocampus, thalamus, anterior insula). Obese differed from lean subjects in behavioral and brain responses rating both beverages as less tasteful and satisfying, yet demonstrating greater brain responses. Obese subjects also showed engagement of an additional brain network (including anterior insula, anterior cingulate, hippocampus, and amygdala) only after sucrose ingestion. CONCLUSIONS & INFERENCES Obese subjects had a reduced behavioral hedonic response, yet a greater engagement of affective brain networks, particularly after sucrose ingestion, suggesting that in obese subjects, lingual and gut-derived signaling generate less central hedonic effects than food-related memories in response to visual cues, analogous to response patterns implicated in food addiction.
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Affiliation(s)
- L. Connolly
- Oppenheimer Family Center for Neurobiology of Stress, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - K. Coveleskie
- Oppenheimer Family Center for Neurobiology of Stress, Los Angeles, CA, USA
| | - L. A. Kilpatrick
- Oppenheimer Family Center for Neurobiology of Stress, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - J. S. Labus
- Oppenheimer Family Center for Neurobiology of Stress, Los Angeles, CA, USA,Division of Digestive Diseases, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Psychiatry, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - B. Ebrat
- Oppenheimer Family Center for Neurobiology of Stress, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - J. Stains
- Oppenheimer Family Center for Neurobiology of Stress, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - Z. Jiang
- Oppenheimer Family Center for Neurobiology of Stress, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - K. Tillisch
- Oppenheimer Family Center for Neurobiology of Stress, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - H. E. Raybould
- Departments of Anatomy, Physiology and Cell Biology, UC Davis School of Veterinary Medicine, Davis, CA, USA
| | - E. A. Mayer
- Oppenheimer Family Center for Neurobiology of Stress, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Psychiatry, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA,Brain Research Institute, UCLA, Los Angeles, CA, USA,Division of Digestive Diseases, Department of Physiology, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
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Labus JS, Mayer EA, Jarcho J, Kilpatrick LA, Kilkens TOC, Evers EAT, Backes WH, Brummer RJM, van Nieuwenhoven MA. Acute tryptophan depletion alters the effective connectivity of emotional arousal circuitry during visceral stimuli in healthy women. Gut 2011; 60:1196-203. [PMID: 21402618 PMCID: PMC3871999 DOI: 10.1136/gut.2010.213447] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Alterations in serotonin signalling within the brain-gut axis have been implicated in the pathophysiology of irritable bowel syndrome (IBS) and is a treatment target. Acute tryptophan depletion (ATD) decreases brain serotonin (5-hydroxytryptamine; 5-HT) levels, and increases visceral perception and negative emotional bias in patients with IBS. The aim of the present study was to determine the effect of ATD on brain activity and connectivity during visceral stimuli in healthy women, and to compare the ATD-induced brain connectivity of an arousal circuit in female patients with IBS without ATD. METHODS 12 healthy females (19-25 years) were studied under placebo (PLA) conditions and ATD. Functional MRI measurements were performed during a rectal barostat protocol, consisting of random non-painful and maximal tolerable distensions. Partial least squares analyses and structural equation modelling were used to evaluate the effect of ATD on functional and effective brain connectivity during distension. Results in healthy controls under ATD were compared with the effective connectivity of brain responses to 45 mm Hg rectal distension in 14 female patients with constipation-predominant IBS (IBS-C) (24-50 years). RESULTS In healthy controls, ATD resulted in increased response of an extensive brain network to balloon distension, including the amygdala and nodes of emotional arousal and homeostatic afferent networks. The effect was greater during high inflation, suggesting greater engagement of the central serotonion system with more aversive visceral stimuli. Effective connectivity analysis revealed a profound effect of ATD on coupling between emotional arousal network nodes, resulting in loss of negative feedback inhibition of the amygdala. A near-identical pattern was identified in the patients with IBS-C. CONCLUSIONS The findings are consistent with an ATD-induced disinhibition of and increased connectivity within an emotional arousal network during aversive stimulation. Together with the previous demonstration of ATD-induced visceral hyperalgesia in healthy controls, and the near-identical effective connectivity pattern observed in patients with IBS-C, these findings suggest that dysregulation of this brain network may play a role in central pain amplification and IBS pathophysiology.
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Affiliation(s)
- J S Labus
- Center for Neurobiology of Stress, Department of Medicine, Physiology and Psychiatry, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - E A Mayer
- Center for Neurobiology of Stress, Department of Medicine, Physiology and Psychiatry, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - J Jarcho
- Center for Neurobiology of Stress, Department of Medicine, Physiology and Psychiatry, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - L A Kilpatrick
- Center for Neurobiology of Stress, Department of Medicine, Physiology and Psychiatry, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - T O C Kilkens
- Department of Psychiatry and Neuropsychology, University Hospital Maastricht, Maastricht, The Netherlands
| | - E A T Evers
- Department of Neuropsychology and Psychopharmacology, Maastricht University, Maastricht, The Netherlands
| | - W H Backes
- Department of Radiology, University Hospital Maastricht, Maastricht, The Netherlands
| | - R-J M Brummer
- Department of Gastroenterology, University Hospital Örebro, Örebro, Sweden
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Kilpatrick LA, Labus JS, Coveleskie K, Hammer C, Rappold G, Tillisch K, Bueller JA, Suyenobu B, Jarcho JM, McRoberts JA, Niesler B, Mayer EA. The HTR3A polymorphism c. -42C>T is associated with amygdala responsiveness in patients with irritable bowel syndrome. Gastroenterology 2011; 140:1943-51. [PMID: 21420406 PMCID: PMC3757951 DOI: 10.1053/j.gastro.2011.03.011] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 02/02/2011] [Accepted: 03/07/2011] [Indexed: 12/19/2022]
Abstract
BACKGROUND & AIMS 5-Hydroxytryptamine (5-HT)3 receptor (5-HT3R) antagonists are effective in treating patients with irritable bowel syndrome (IBS) and have anxiolytic effects. Their therapeutic effects are related, in part, to reducing amygdala engagement during expected visceral pain. A single nucleotide polymorphism in HTR3A, c.-42C>T;(C178T; rs1062613), is associated with altered reactivity of the amygdala during emotional face processing in healthy subjects (controls). We evaluated the influence of this single nucleotide polymorphism on amygdala reactivity to emotional faces and nonemotional stimuli in female patients with IBS and controls. METHODS We measured brain responses during an affect-matching paradigm in 54 women (26 with IBS, 29 controls) using functional magnetic resonance imaging. We examined associations between HTR3A c.-42C>T genotype (C/C vs T carrier) and responses in amygdala and other regions of brain that expressed high levels of 5-HT3R. RESULTS The C/C genotype was associated with greater anxiety symptoms in patients with IBS and controls and increased activation of the amygdala under emotional and nonemotional conditions. Among patients with IBS, C/C genotype was associated with greater symptom ratings. A subset of IBS patients with the C/C genotype had increased amygdala responses to nonemotional stimuli, compared with other subjects with C/C genotype. CONCLUSIONS Regardless of diagnosis, the C/C genotype of the c.-42C>T polymorphism in HTR3A, compared with T carrier status, is associated with increased anxiety and amygdala responsiveness during emotional and nonemotional tasks. This polymorphism was associated with severity of IBS symptoms. Although this genotype is not sufficient for diagnosis of IBS, it is associated with severity of symptoms.
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Affiliation(s)
- LA Kilpatrick
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - JS Labus
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Psychiatry & Biobehavioral Sciences, Ahmanson-Lovelace Brain Mapping Center, UCLA, Brain Research Institute, David Geffen School of Medicine, UCLA
| | - K Coveleskie
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - C Hammer
- Department of Human Molecular Genetics, University of Heidelberg, Germany
| | - G Rappold
- Department of Human Molecular Genetics, University of Heidelberg, Germany
| | - K Tillisch
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - JA Bueller
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - B Suyenobu
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - JM Jarcho
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - JA McRoberts
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - B Niesler
- Department of Human Molecular Genetics, University of Heidelberg, Germany
| | - EA Mayer
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Psychiatry & Biobehavioral Sciences, Ahmanson-Lovelace Brain Mapping Center, UCLA, Brain Research Institute, David Geffen School of Medicine, UCLA
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Kilpatrick LA, Ornitz E, Ibrahimovic H, Treanor M, Craske M, Nazarian M, Labus JS, Mayer EA, Naliboff BD. Sex-related differences in prepulse inhibition of startle in irritable bowel syndrome (IBS). Biol Psychol 2010; 84:272-8. [PMID: 20193731 PMCID: PMC2875286 DOI: 10.1016/j.biopsycho.2010.02.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Revised: 01/25/2010] [Accepted: 02/22/2010] [Indexed: 12/24/2022]
Abstract
Alterations in central networks involved in the regulation of arousal, attention, and cognition may be critical for irritable bowel syndrome (IBS) symptom maintenance and exacerbation. Differential sensitivities in these networks may underlie sex differences noted in IBS. The current study examined prepulse inhibition (PPI), a measure of sensorimotor gating, in male and female IBS patients. Relationships between PPI and symptom severity were examined, as well as potential menstrual status effects. Compared to healthy controls, male IBS patients had significantly reduced PPI; whereas female IBS patients (particularly naturally cycling women) had significantly enhanced PPI suggesting hypervigilance. Considering previously demonstrated sex-related differences in perceptual and brain imaging findings in IBS patients, the current findings suggest that different neurobiological mechanisms underlie symptom presentation in male and female IBS patients. Compromised filtering of information in male IBS patients may be due to compromised top down (prefrontal, midcingulate) control mechanisms while increased attention to threat due to increased limbic and paralimbic circuits may be characteristic of female IBS patients.
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Affiliation(s)
- L A Kilpatrick
- Center for Neurobiology of Stress, David Geffen School of Medicine, UCLA, USA
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Kilpatrick LA, Suyenobu BY, Smith SR, Bueller JA, Mayer EA, Naliboff BD. Impact of Mindfulness Meditation Training on the Default Network. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71639-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Kilpatrick LA, Zald DH, Pardo JV, Cahill LF. Sex-related differences in amygdala functional connectivity during resting conditions. Neuroimage 2006; 30:452-61. [PMID: 16326115 DOI: 10.1016/j.neuroimage.2005.09.065] [Citation(s) in RCA: 140] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2005] [Revised: 09/28/2005] [Accepted: 09/29/2005] [Indexed: 10/25/2022] Open
Abstract
Recent neuroimaging studies have established a sex-related hemispheric lateralization of amygdala involvement in memory for emotionally arousing material. Here, we examine the possibility that sex-related differences in amygdala involvement in memory for emotional material develop from differential patterns of amygdala functional connectivity evident in the resting brain. Seed voxel partial least square analyses of regional cerebral blood flow data revealed significant sex-related differences in amygdala functional connectivity during resting conditions. The right amygdala was associated with greater functional connectivity in men than in women. In contrast, the left amygdala was associated with greater functional connectivity in women than in men. Furthermore, the regions displaying stronger functional connectivity with the right amygdala in males (sensorimotor cortex, striatum, pulvinar) differed from those displaying stronger functional connectivity with the left amygdala in females (subgenual cortex, hypothalamus). These differences in functional connectivity at rest may link to sex-related differences in medical and psychiatric disorders.
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Affiliation(s)
- L A Kilpatrick
- Center for the Neurobiology of Learning and Memory, University of CA, Irvine, CA 92697-4550, USA.
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