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Harnett NG, Dumornay NM, Delity M, Sanchez LD, Mohiuddin K, Musey PI, Seamon MJ, McLean SA, Kessler RC, Koenen KC, Beaudoin FL, Lebois L, van Rooij SJ, Sampson NA, Michopoulos V, Maples-Keller JL, Haran JP, Storrow AB, Lewandowski C, Hendry PL, Sheikh S, Jones CW, Punches BE, Kurz MC, Swor RA, McGrath ME, Hudak LA, Pascual JL, House SL, An X, Stevens JS, Neylan TC, Jovanovic T, Linnstaedt SD, Germine LT, Datner EM, Chang AM, Pearson C, Peak DA, Merchant RC, Domeier RM, Rathlev NK, O’Neil BJ, Sergot P, Bruce SE, Miller MW, Pietrzak RH, Joormann J, Barch DM, Pizzagalli DA, Sheridan JF, Smoller JW, Luna B, Harte SE, Elliott JM, Ressler KJ. Prior differences in previous trauma exposure primarily drive the observed racial/ethnic differences in posttrauma depression and anxiety following a recent trauma. Psychol Med 2023; 53:2553-2562. [PMID: 35094717 PMCID: PMC9339026 DOI: 10.1017/s0033291721004475] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Racial and ethnic groups in the USA differ in the prevalence of posttraumatic stress disorder (PTSD). Recent research however has not observed consistent racial/ethnic differences in posttraumatic stress in the early aftermath of trauma, suggesting that such differences in chronic PTSD rates may be related to differences in recovery over time. METHODS As part of the multisite, longitudinal AURORA study, we investigated racial/ethnic differences in PTSD and related outcomes within 3 months after trauma. Participants (n = 930) were recruited from emergency departments across the USA and provided periodic (2 weeks, 8 weeks, and 3 months after trauma) self-report assessments of PTSD, depression, dissociation, anxiety, and resilience. Linear models were completed to investigate racial/ethnic differences in posttraumatic dysfunction with subsequent follow-up models assessing potential effects of prior life stressors. RESULTS Racial/ethnic groups did not differ in symptoms over time; however, Black participants showed reduced posttraumatic depression and anxiety symptoms overall compared to Hispanic participants and White participants. Racial/ethnic differences were not attenuated after accounting for differences in sociodemographic factors. However, racial/ethnic differences in depression and anxiety were no longer significant after accounting for greater prior trauma exposure and childhood emotional abuse in White participants. CONCLUSIONS The present findings suggest prior differences in previous trauma exposure partially mediate the observed racial/ethnic differences in posttraumatic depression and anxiety symptoms following a recent trauma. Our findings further demonstrate that racial/ethnic groups show similar rates of symptom recovery over time. Future work utilizing longer time-scale data is needed to elucidate potential racial/ethnic differences in long-term symptom trajectories.
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Affiliation(s)
- N. G. Harnett
- Division of Depression and Anxiety, McLean Hospital, Belmont, MA, 02478, USA
- Department of Psychiatry, Harvard Medical School, Boston, MA, 02115, USA
| | - N. M. Dumornay
- Division of Depression and Anxiety, McLean Hospital, Belmont, MA, 02478, USA
| | - M. Delity
- Division of Depression and Anxiety, McLean Hospital, Belmont, MA, 02478, USA
| | - L. D. Sanchez
- Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, MA, 02215, USA
- Department of Emergency Medicine, Harvard Medical School, Boston, MA, 02115, USA
| | - K. Mohiuddin
- Department of Emergency Medicine, Einstein Medical Center, Philadelphia, PA, 19141, USA
| | - P. I. Musey
- Department of Emergency Medicine, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - M. J. Seamon
- Department of Surgery, Division of Traumatology, Surgical Critical Care and Emergency Surgery, University of Pennsylvania, Pennsylvania, PA, 19104, USA
| | - S. A. McLean
- Department of Emergency Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27559, USA
- Institute for Trauma Recovery, Department of Anesthesiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27559, USA
| | - R. C. Kessler
- Department of Health Care Policy, Harvard Medical School, Boston, MA, 02115, USA
| | - K. C. Koenen
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, 02115, USA
| | - F. L. Beaudoin
- Department of Emergency Medicine & Department of Health Services, Policy, and Practice, The Alpert Medical School of Brown University, Rhode Island Hospital and The Miriam Hospital, Providence, RI, 02930, USA
| | - L. Lebois
- Division of Depression and Anxiety, McLean Hospital, Belmont, MA, 02478, USA
- Department of Psychiatry, Harvard Medical School, Boston, MA, 02115, USA
| | - S. J. van Rooij
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, 30332, USA
| | - N. A. Sampson
- Department of Health Care Policy, Harvard Medical School, Boston, MA, 02115, USA
| | - V. Michopoulos
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, 30332, USA
| | - J. L. Maples-Keller
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, 30332, USA
| | - J. P. Haran
- Department of Emergency Medicine, University of Massachusetts Medical School, Worcester, MA, 01655, USA
| | - A. B. Storrow
- Department of Emergency Medicine, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - C. Lewandowski
- Department of Emergency Medicine, Henry Ford Health System, Detroit, MI, 48202, USA
| | - P. L. Hendry
- Department of Emergency Medicine, University of Florida College of Medicine -Jacksonville, Jacksonville, FL, 32209, USA
| | - S. Sheikh
- Department of Emergency Medicine, University of Florida College of Medicine -Jacksonville, Jacksonville, FL, 32209, USA
| | - C. W. Jones
- Department of Emergency Medicine, Cooper Medical School of Rowan University, Camden, NJ, 08103, USA
| | - B. E. Punches
- Department of Emergency Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA
- College of Nursing, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - M. C. Kurz
- Department of Emergency Medicine, University of Alabama School of Medicine, Birmingham, AL, 35294, USA
- Department of Surgery, Division of Acute Care Surgery, University of Alabama School of Medicine, Birmingham, AL, 35294, USA
- Center for Injury Science, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - R. A. Swor
- Department of Emergency Medicine, Oakland University William Beaumont School of Medicine, Rochester, MI, 48309, USA
| | - M. E. McGrath
- Department of Emergency Medicine, Boston Medical Center, Boston, MA, 02118, USA
| | - L. A. Hudak
- Department of Emergency Medicine, Emory University School of Medicine, Atlanta, GA, 30329, USA
| | - J. L. Pascual
- Department of Surgery, Department of Neurosurgery, University of Pennsylvania, Pennsylvania, PA, 19104, USA
- Perelman School of Medicine, University of Pennsylvania, Pennsylvania, PA, 19104, USA
| | - S. L. House
- Department of Emergency Medicine,, Washington University School of Medicine,, St. Louis, MO, 63130, USA
| | - X. An
- Institute for Trauma Recovery, Department of Anesthesiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27559, USA
| | - J. S. Stevens
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, 30329, USA
| | - T. C. Neylan
- Departments of Psychiatry and Neurology, University of California San Francisco, San Francisco, CA, 94143, USA
| | - T. Jovanovic
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MA, 48202, USA
| | - S. D. Linnstaedt
- Institute for Trauma Recovery, Department of Anesthesiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27559, USA
| | - L. T. Germine
- Department of Psychiatry, Harvard Medical School, Boston, MA, 02115, USA
- Institute for Technology in Psychiatry, McLean Hospital, Belmont, MA, 02478, USA
| | - E. M. Datner
- Department of Emergency Medicine, Einstein Healthcare Network, Pennsylvania, PA, 19141, USA
- Department of Emergency Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, Pennsylvania, PA, 19107, USA
| | - A. M. Chang
- Department of Emergency Medicine, Jefferson University Hospitals, Pennsylvania, PA, 19107, USA
| | - C. Pearson
- Department of Emergency Medicine, Wayne State University, Detroit, MA, 48202, USA
| | - D. A. Peak
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - R. C. Merchant
- Department of Emergency Medicine, Brigham and Women’s Hospital, Boston, MA, 02115, USA
| | - R. M. Domeier
- Department of Emergency Medicine, Saint Joseph Mercy Hospital, Ypsilanti, MI, 48197, USA
| | - N. K. Rathlev
- Department of Emergency Medicine, University of Massachusetts Medical School-Baystate, Springfield, MA, 01107, USA
| | - B. J. O’Neil
- Department of Emergency Medicine, Wayne State University, Detroit, MA, 48202, USA
| | - P. Sergot
- Department of Emergency Medicine, McGovern Medical School, University of Texas Health, Houston, TX, 77030, USA
| | - S. E. Bruce
- Department of Psychological Sciences, University of Missouri - St. Louis, St. Louis, MO, 63121, USA
| | - M. W. Miller
- National Center for PTSD, Behavioral Science Division, VA Boston Healthcare System, Boston, MA, 02130, USA
- Department of Psychiatry, Boston University School of Medicine, Boston, MA, 02118, USA
| | - R. H. Pietrzak
- National Center for PTSD, Clinical Neurosciences Division, VA Connecticut Healthcare System, West Haven, CT, 06516, USA
- Department of Psychiatry, Yale School of Medicine, West Haven, CT, 06510, USA
| | - J. Joormann
- Department of Psychology, Yale University, West Haven, CT, 06520, USA
| | - D. M. Barch
- Department of Psychological & Brain Sciences, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - D. A. Pizzagalli
- Division of Depression and Anxiety, McLean Hospital, Belmont, MA, 02478, USA
- Department of Psychiatry, Harvard Medical School, Boston, MA, 02115, USA
| | - J. F. Sheridan
- Department of Biosciences, OSU Wexner Medical Center, Columbus, OH, 43210, USA
- Institute for Behavioral Medicine Research, OSU Wexner Medical Center, Columbus, OH, 43211, USA
| | - J. W. Smoller
- Department of Psychiatry, Psychiatric and Neurodevelopmental Genetics Unit, Massachusetts General Hospital, Boston, MA, 02114, USA
- Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA, 02142, USA
| | - B. Luna
- Affiliation Laboratory of Neurocognitive Development, University of Pittsburgh Medical Center- Western Psychiatric Hospital, Pittsburgh, PA, 15213, USA
| | - S. E. Harte
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Department of Internal Medicine-Rheumatology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - J. M. Elliott
- Kolling Institute of Medical Research, University of Sydney, St Leonards, New South Wales, 2065, Australia
- Faculty of Medicine and Health, University of Sydney, Camperdown, New South Wales, 2006,, Australia
- Physical Therapy & Human Movement Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60208, USA
| | - K. J. Ressler
- Division of Depression and Anxiety, McLean Hospital, Belmont, MA, 02478, USA
- Department of Psychiatry, Harvard Medical School, Boston, MA, 02115, USA
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2
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Velasco ER, Florido A, Flores Á, Senabre E, Gomez-Gomez A, Torres A, Roca A, Norrholm S, Newman EL, Das P, Ross RA, Lori A, Pozo OJ, Ressler KJ, Garcia-Esteve LL, Jovanovic T, Andero R. PACAP-PAC1R modulates fear extinction via the ventromedial hypothalamus. Nat Commun 2022; 13:4374. [PMID: 35902577 PMCID: PMC9334354 DOI: 10.1038/s41467-022-31442-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 06/16/2022] [Indexed: 12/14/2022] Open
Abstract
Exposure to traumatic stress can lead to fear dysregulation, which has been associated with posttraumatic stress disorder (PTSD). Previous work showed that a polymorphism in the PACAP-PAC1R (pituitary adenylate cyclase-activating polypeptide) system is associated with PTSD risk in women, and PACAP (ADCYAP1)-PAC1R (ADCYAP1R1) are highly expressed in the hypothalamus. Here, we show that female mice subjected to acute stress immobilization (IMO) have fear extinction impairments related to Adcyap1 and Adcyap1r1 mRNA upregulation in the hypothalamus, PACAP-c-Fos downregulation in the Medial Amygdala (MeA), and PACAP-FosB/ΔFosB upregulation in the Ventromedial Hypothalamus dorsomedial part (VMHdm). DREADD-mediated inhibition of MeA neurons projecting to the VMHdm during IMO rescues both PACAP upregulation in VMHdm and the fear extinction impairment. We also found that women with the risk genotype of ADCYAP1R1 rs2267735 polymorphism have impaired fear extinction.
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Affiliation(s)
- E R Velasco
- Institut de Neurociències, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain
| | - A Florido
- Institut de Neurociències, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain
- Departament de Psicobiologia i de Metodologia de les Ciències de la Salut, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain
| | - Á Flores
- Institut de Neurociències, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain
| | - E Senabre
- Laboratory of Neuropharmacology-NeuroPhar, Department of Experimental and Health Sciences, University Pompeu Fabra, Barcelona, Spain
| | - A Gomez-Gomez
- Integrative Pharmacology and Systems Neuroscience Research Group, Neurosciences Research Program, IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - A Torres
- Perinatal Mental health Unit, Department of Psychiatry and Clinical Psychology, Institute of Neuroscience, Hospital Clínic, IDIBAPS, Barcelona, Spain
- Programme for the Prevention and Treatment of Psychic Effects in Sexually Assaulted Women. Hospital Clínic de Barcelona, Barcelona, Spain
| | - A Roca
- Perinatal Mental health Unit, Department of Psychiatry and Clinical Psychology, Institute of Neuroscience, Hospital Clínic, IDIBAPS, Barcelona, Spain
| | - S Norrholm
- Department of Psychiatry and Behavioral Neuroscience, Wayne State University, Detroit, MI, USA
| | - E L Newman
- McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, USA
| | - P Das
- Department of Neuroscience, Albert Einstein College of Medicine, Psychiatry Research Institute of Montefiore and Einstein, New York, NY, USA
| | - R A Ross
- Department of Neuroscience, Albert Einstein College of Medicine, Psychiatry Research Institute of Montefiore and Einstein, New York, NY, USA
| | - A Lori
- Department of Psychiatry & Behavioral Sciences, Emory University, Atlanta, GA, USA
- American Cancer Society, Inc., Atlanta, GA, USA
| | - O J Pozo
- Integrative Pharmacology and Systems Neuroscience Research Group, Neurosciences Research Program, IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - K J Ressler
- McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA, USA
| | - L L Garcia-Esteve
- Perinatal Mental health Unit, Department of Psychiatry and Clinical Psychology, Institute of Neuroscience, Hospital Clínic, IDIBAPS, Barcelona, Spain
- Programme for the Prevention and Treatment of Psychic Effects in Sexually Assaulted Women. Hospital Clínic de Barcelona, Barcelona, Spain
| | - T Jovanovic
- Department of Psychiatry and Behavioral Neuroscience, Wayne State University, Detroit, MI, USA
| | - R Andero
- Departament de Psicobiologia i de Metodologia de les Ciències de la Salut, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain.
- Centro de Investigación Biomédica En Red en Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain.
- Unitat de Neurociència Traslacional, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc Taulí (I3PT), Institut de Neurociències, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain.
- ICREA, Barcelona, Spain.
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3
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Jovanovic T, Wiltshire CN, Reda MH, France J, Wanna CP, Minton ST, Davie W, Grasser LR, Winters S, Schacter H, Marusak HA, Stenson AF. Uncertain in the face of change: Lack of contingency shift awareness during extinction is associated with higher fear-potentiated startle and PTSD symptoms in children. Int J Psychophysiol 2022; 178:90-98. [PMID: 35718286 DOI: 10.1016/j.ijpsycho.2022.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 02/14/2022] [Revised: 05/09/2022] [Accepted: 06/07/2022] [Indexed: 10/18/2022]
Abstract
Intolerance of uncertainty is a transdiagnostic risk factor for fear-related disorders and is associated with higher levels of anxiety in children and adolescents. It is unclear how uncertainty relates to development of psychopathology in children who have experienced trauma in early life. The present study used a fear-potentiated startle paradigm in children to examine associations between uncertainty (assessed as unawareness of a change in reinforcement during fear extinction) and symptoms of anxiety and posttraumatic stress disorder (PTSD), as well as startle potentiation to threat and safety cues. Results showed that unaware children had strong positive associations between trauma exposure and PTSD symptoms, whereas aware children did not. Uncertainty interacted with anxiety in that children who were both unaware and had higher anxiety displayed higher fear-potentiated startle to safety cues and did not show discrimination between threat and safety during fear conditioning. These results suggest that anxious children who persist in associating a threat cue with an aversive event during extinction, after repeated presentations of the no longer reinforced conditioned stimulus, may express psychophysiological phenotypes related to PTSD.
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Affiliation(s)
- T Jovanovic
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States.
| | - C N Wiltshire
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States
| | - M H Reda
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States
| | - J France
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States
| | - C P Wanna
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States
| | - S T Minton
- Department of Psychiatry and Behavioral Sciences, Emory University, Atlanta, GA, United States
| | - W Davie
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States
| | - L R Grasser
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States
| | - S Winters
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States
| | - H Schacter
- Department of Psychology, Wayne State University, Detroit, MI, United States
| | - H A Marusak
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States
| | - A F Stenson
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University, Detroit, MI, United States
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4
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Reda MH, Marusak HA, Ely TD, van Rooij SJH, Stenson AF, Stevens JS, France JM, Tottenham N, Jovanovic T. Community Violence Exposure is Associated with Hippocampus-Insula Resting State Functional Connectivity in Urban Youth. Neuroscience 2021; 468:149-157. [PMID: 34129912 PMCID: PMC8366937 DOI: 10.1016/j.neuroscience.2021.06.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 04/12/2021] [Revised: 06/03/2021] [Accepted: 06/07/2021] [Indexed: 11/16/2022]
Abstract
Our previous work has linked childhood violence exposure in Black youth to functional changes in the hippocampus, a brain region sensitive to stress. However, different contexts of violence exposure (e.g., community, home, school) may have differential effects on circuitry. We investigated the unique effect of community violence in predicting resting-state functional connectivity (rsFC) in the hippocampus. Fifty-two (26F) violence-exposed Black youth ages 8-15 performed resting-state functional neuroimaging scans while looking at a fixation cross for seven minutes with eyes open. Seed-based analyses were conducted to examine the association between total violence exposure and rsFC of the hippocampus to the whole brain. Follow-up hierarchical regression analysis were performed to specifically investigate community violence. Violence exposure was associated with higher hippocampus rsFC with a core node of the Default Mode Network (i.e., posterior cingulate cortex) and lower hippocampal rsFC with a core node of the Salience Network (i.e., insula). Community violence uniquely associated with lower hippocampus-insula rsFC, after controlling for home and school violence, sex and age. Age-related decreases in hippocampus-insula rsFC were also present in youth with lower violence exposure, but not in youth with higher violence exposure. This is one of the first studies to investigate the unique impact of community violence, above home and school violence, on threat circuitry. Our data suggest functional alterations in the hippocampus in violence-exposed youth, and that violence in the community may be a more salient form of threat exposure compared to other forms of violence experienced by youth.
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Affiliation(s)
- M H Reda
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, United States.
| | - H A Marusak
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, United States
| | - T D Ely
- Department of Psychiatry and Behavioral Neurosciences, Emory University School of Medicine, Atlanta, GA, United States
| | - S J H van Rooij
- Department of Psychiatry and Behavioral Neurosciences, Emory University School of Medicine, Atlanta, GA, United States
| | - A F Stenson
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, United States
| | - J S Stevens
- Department of Psychiatry and Behavioral Neurosciences, Emory University School of Medicine, Atlanta, GA, United States
| | - J M France
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, United States
| | - N Tottenham
- Department of Psychology, Columbia University, New York, NY, United States
| | - T Jovanovic
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, United States
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5
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Clendinen C, Hardy R, La Barrie D, Surapaneni S, Jovanovic T, Bradley B, Fani N. B - 27Posttraumatic and Depressive Anhedonia: Common and Distinct Cognitive Profiles. Arch Clin Neuropsychol 2018. [DOI: 10.1093/arclin/acy061.103] [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: 11/13/2022] Open
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6
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Jakovljevic A, Knezevic A, Nikolic N, Soldatovic I, Jovanovic T, Milasin J, Andric M. Herpesviruses viral loads and levels of proinflammatory cytokines in apical periodontitis. Oral Dis 2018; 24:840-846. [DOI: 10.1111/odi.12829] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/01/2018] [Accepted: 01/03/2018] [Indexed: 12/19/2022]
Affiliation(s)
- A Jakovljevic
- Department of Pathophysiology; School of Dental Medicine; University of Belgrade; Belgrade Serbia
| | - A Knezevic
- Department of Virology; Institute of Microbiology and Immunology; Faculty of Medicine; University of Belgrade; Belgrade Serbia
| | - N Nikolic
- Department of Human Genetics; School of Dental Medicine; University of Belgrade; Belgrade Serbia
| | - I Soldatovic
- Department of Medical Statistics and Informatics; Faculty of Medicine; University of Belgrade; Belgrade Serbia
| | - T Jovanovic
- Department of Virology; Institute of Microbiology and Immunology; Faculty of Medicine; University of Belgrade; Belgrade Serbia
| | - J Milasin
- Department of Human Genetics; School of Dental Medicine; University of Belgrade; Belgrade Serbia
| | - M Andric
- Clinic of Oral Surgery; School of Dental Medicine; University of Belgrade; Belgrade Serbia
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7
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Jakovljevic A, Andric M, Nikolic N, Coric V, Krezovic S, Carkic J, Knezevic A, Beljic-Ivanovic K, Pljesa-Ercegovac M, Miletic M, Soldatovic I, Radosavljevic T, Jovanovic T, Simic T, Ivanovic V, Milasin J. Levels of oxidative stress biomarkers and bone resorption regulators in apical periodontitis lesions infected by Epstein-Barr virus. Int Endod J 2018; 51:593-604. [PMID: 29315650 DOI: 10.1111/iej.12886] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 01/04/2018] [Indexed: 02/05/2023]
Abstract
AIM To investigate whether apical periodontitis lesions infected by Epstein-Barr virus (EBV) exhibit higher levels of oxidative stress biomarkers [8-hydroxydeoxyguanosine (8-OHdG) and oxidized glutathione (GSSG)] and bone resorption regulators [receptor activator of nuclear factor (NF-κB) ligand (RANKL) and osteoprotegerin (OPG)] compared to EBV-negative periapical lesions and healthy pulp tissues. METHODOLOGY The experimental group consisted of 30 EBV-positive and 30 EBV-negative periapical lesions collected in conjunction with apicoectomy. The pulp tissues of 20 impacted third molars were used as healthy controls. The qualitative and quantitative analysis of EBV was performed by nested and real-time polymerase chain reaction (PCR), respectively. The levels of RANKL and OPG were analysed by reverse transcriptase real-time PCR. The levels of 8-OHdG and GSSG were determined by enzyme-linked immunosorbent assay (ELISA). Mann-Whitney U-test and Spearman's correlation were used for statistical analysis. RESULTS The levels of RANKL, OPG, 8-OHdG and GSSG were significantly higher in apical periodontitis lesions compared to healthy pulp controls (P = 0.001, P < 0.001, P < 0.001 and P < 0.05, respectively). RANKL and OPG mRNA expression was significantly higher in EBV-positive compared to EBV-negative periapical lesions (P < 0.05). There was no significant correlation between EBV copy numbers and levels of RANKL, OPG, 8OH-dG and GSSG in apical periodontitis. CONCLUSION Levels of bone resorption regulators and oxidative stress biomarkers were increased in apical periodontitis compared to healthy pulp tissues. EBV-positive periapical lesions exhibited higher levels of RANKL and OPG compared to EBV-negative periapical lesions. EBV may contribute to progression of apical periodontitis via enhanced production of bone resorption regulators.
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Affiliation(s)
- A Jakovljevic
- Department of Pathophysiology, School of Dental Medicine, University of Belgrade, Belgrade, Serbia.,Clinic of Oral Surgery, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - M Andric
- Clinic of Oral Surgery, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - N Nikolic
- Department of Biology and Human Genetics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - V Coric
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - S Krezovic
- Clinic of Oral Surgery, School of Dental Medicine, University of Belgrade, Belgrade, Serbia.,Department of Biology and Human Genetics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - J Carkic
- Department of Biology and Human Genetics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia.,Department of Microbiology, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - A Knezevic
- Institute of Microbiology and Immunology, Department of Virology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - K Beljic-Ivanovic
- Clinic of Restorative Dentistry and Endodontics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - M Pljesa-Ercegovac
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - M Miletic
- Department of Pathophysiology, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - I Soldatovic
- Institute of Medical Statistics and Informatics, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - T Radosavljevic
- Institute of Pathophysiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - T Jovanovic
- Institute of Microbiology and Immunology, Department of Virology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - T Simic
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - V Ivanovic
- Clinic of Restorative Dentistry and Endodontics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - J Milasin
- Department of Biology and Human Genetics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
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Maddox SA, Kilaru V, Shin J, Jovanovic T, Almli LM, Dias BG, Norrholm SD, Fani N, Michopoulos V, Ding Z, Conneely KN, Binder EB, Ressler KJ, Smith AK. Estrogen-dependent association of HDAC4 with fear in female mice and women with PTSD. Mol Psychiatry 2018; 23:658-665. [PMID: 28093566 PMCID: PMC5513798 DOI: 10.1038/mp.2016.250] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 10/10/2015] [Accepted: 11/22/2016] [Indexed: 12/13/2022]
Abstract
Women are at increased risk of developing post-traumatic stress disorder (PTSD) following a traumatic event. Recent studies suggest that this may be mediated, in part, by circulating estrogen levels. This study evaluated the hypothesis that individual variation in response to estrogen levels contributes to fear regulation and PTSD risk in women. We evaluated DNA methylation from blood of female participants in the Grady Trauma Project and found that serum estradiol levels associates with DNA methylation across the genome. For genes expressed in blood, we examined the association between each CpG site and PTSD diagnosis using linear models that adjusted for cell proportions and age. After multiple test correction, PTSD associated with methylation of CpG sites in the HDAC4 gene, which encodes histone deacetylase 4, and is involved in long-term memory formation and behavior. DNA methylation of HDAC4 CpG sites were tagged by a nearby single-nucleotide polymorphism (rs7570903), which also associated with HDAC4 expression, fear-potentiated startle and resting-state functional connectivity of the amygdala in traumatized humans. Using auditory Pavlovian fear conditioning in a rodent model, we examined the regulation of Hdac4 in the amygdala of ovariectomized (OVX) female mice. Hdac4 messenger RNA levels were higher in the amygdala 2 h after tone-shock presentations, compared with OVX-homecage control females. In naturally cycling females, tone-shock presentations increased Hdac4 expression relative to homecage controls for metestrous (low estrogen) but not the proestrous (high estrogen) group. Together, these results support an estrogenic influence of HDAC4 regulation and expression that may contribute to PTSD in women.
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Affiliation(s)
- S A Maddox
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, USA,McLean Hospital, Harvard Medical School, Belmont, MA, USA
| | - V Kilaru
- Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA
| | - J Shin
- Center for Advanced Brain Imaging (CABI), Georgia Institute of Technology, Atlanta, GA, USA
| | - T Jovanovic
- Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA
| | - L M Almli
- Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA
| | - B G Dias
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, USA,Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA
| | - S D Norrholm
- Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA,Atlanta VA Medical Center, Atlanta, GA, USA
| | - N Fani
- Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA
| | - V Michopoulos
- Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA
| | - Z Ding
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, USA
| | - K N Conneely
- Department of Human Genetics, Emory University, Atlanta, GA, USA
| | - E B Binder
- Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA,Department of Translational Research in Psychiatry, Max Planck Institute of Psychiatry, Munich, Germany
| | - K J Ressler
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, USA,McLean Hospital, Harvard Medical School, Belmont, MA, USA,Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA
| | - A K Smith
- Department of Psychiatry, School of Medicine, Emory University, Atlanta, GA, USA,Department of Gynecology and Obstetrics, School of Medicine, Emory University, Atlanta, GA, USA,Department of Gynecology and Obstetrics, School of Medicine, Emory University, 101 Woodruff Circle NE, Suite 4217, Atlanta, GA 30322, USA. E-mail:
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Abstract
Background The aim of this study was to confirm the presence of herpes simplex virus type 1 and 2 on the oral mucosa, in patients undergoing chemotherapy, by means of polymerase chain reaction (PCR). Methods The research was carried out on 40 patients receiving chemotherapy as treatment for different malignancies. The status of oral mucosa and viral presence were assessed in all patients at the initial examination (prior to chemotherapy), and at the control examination (two weeks after the initiation of the chemotherapeutic cycle). Results The presence of HSV-1 was detected in 28 patients (70%) prior to chemotherapy, of whom 7 (25%) manifested oral complications. The control examination showed the presence of HSV-1 in 35 patients (87.5%), of whom 23 (65.7%) presented oral mucosa changes. HSV-2 has not been detected in any of the patients.
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Affiliation(s)
- M Djuric
- Clinic of Dentistry, School of Medicine, University of Novi Sad, Novi Sad, Serbia.
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Al Mansour M, Izzo L, Mazzone G, Gabriele R, Di Cello P, Basso L, Ranieri E, Costi U, Jovanovic T, Izzo P. Curative gastric resection for the elderly patients suffering from gastric cancer. G Chir 2016; 37:13-8. [PMID: 27142820 DOI: 10.11138/gchir/2016.37.1.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The improvement of the socio-economic conditions and the progress of medicine have extended the life span of the world's population and as a result, the number of patients with malignant neoplasms has increased. Gastric cancer is the third most common cancer (after lung and prostate) and the second leading cause of death caused by cancer (after lung bronchogenic cell carcinoma) in males; while it's the fifth cancer by frequency and the fourth cause of cancer death in females. It presents a peculiar geographical distribution with a lower incidence in Western Europe and North America, and higher incidence in the Far East, South America and Eastern Europe. Its incidence in Italy is 122 cases per 100000 inhabitants in males and 83 cases per 100000 inhabitants in females (in Italy). It occurs more frequently in old age, is quite rare in individuals under the age of 45. The aim of this work is to analyze the clinical and pathological characteristics of gastric carcinoma and the feasibility of curative surgery in patients over 75, identifying the factors affecting mortality, morbidity, survival and quality of life after surgery. These data have been compared with those of younger patients to assess the correct type of surgery.
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Kaminsky Z, Wilcox HC, Eaton WW, Van Eck K, Kilaru V, Jovanovic T, Klengel T, Bradley B, Binder EB, Ressler KJ, Smith AK. Epigenetic and genetic variation at SKA2 predict suicidal behavior and post-traumatic stress disorder. Transl Psychiatry 2015; 5:e627. [PMID: 26305478 PMCID: PMC4564560 DOI: 10.1038/tp.2015.105] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 06/14/2015] [Indexed: 11/09/2022] Open
Abstract
Traumatic stress results in hypothalamic pituitary adrenal (HPA) axis abnormalities and an increased risk to both suicidal behaviors and post-traumatic stress disorder (PTSD). Previous work out of our laboratory identified SKA2 DNA methylation associations with suicidal behavior in the blood and brain of multiple cohorts. Interaction of SKA2 with stress predicted suicidal behavior with ~80% accuracy. SKA2 is hypothesized to reduce the ability to suppress cortisol following stress, which is of potentially high relevance in traumatized populations. Our objective was to investigate the interaction of SKA2 and trauma exposure on HPA axis function, suicide attempt and PTSD. SKA2 DNA methylation at Illumina HM450 probe cg13989295 was assessed for association with suicidal behavior and PTSD metrics in the context of Child Trauma Questionnaire (CTQ) scores in 421 blood and 61 saliva samples from the Grady Trauma Project (GTP) cohort. Dexamethasone suppression test (DST) data were evaluated for a subset of 209 GTP subjects. SKA2 methylation interacted with CTQ scores to predict lifetime suicide attempt in saliva and blood with areas under the receiver operator characteristic curve (AUCs) of 0.76 and 0.73 (95% confidence interval (CI): 0.6-0.92, P = 0.003, and CI: 0.65-0.78, P < 0.0001) and to mediate the suppression of cortisol following DST (β = 0.5 ± 0.19, F = 1.51, degrees of freedom (df) = 12/167, P = 0.0096). Cumulatively, the data suggest that epigenetic variation at SKA2 mediates vulnerability to suicidal behaviors and PTSD through dysregulation of the HPA axis in response to stress.
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Affiliation(s)
- Z Kaminsky
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - H C Wilcox
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - W W Eaton
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - K Van Eck
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - V Kilaru
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - T Jovanovic
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - T Klengel
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - B Bradley
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
- Mental Health Service Line, Department of Veterans Affairs Medical, Atlanta, GA, USA
| | - E B Binder
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
- Department of Translational Research in Psychiatry, Max Planck Institute of Psychiatry, Munich, Germany
| | - K J Ressler
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
- Howard Hughes Medical Institute, Chevy Chase, MD, USA
| | - A K Smith
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
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Matic R, Stamenkovic S, Vukicevic-Radic O, Jovanovic T. The Analysis of Collembolan Species' Abundance Distribution in Beech and Spruce Forests Habitats in Jastrebac Mountain (Serbia). BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2006.10817306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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13
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Jovanovic T, Koruga D. Recent advances in chromatographic separation and spectroscopic characterization of the higher fullerenes C76 and C84. Recent Pat Nanotechnol 2014; 8:62-75. [PMID: 24635208 DOI: 10.2174/1872210508999140130122454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Revised: 12/20/2013] [Accepted: 01/01/2014] [Indexed: 06/03/2023]
Abstract
The basic and the higher fullerenes were chromatographically isolated from the obtained series of carbon soot extracts, in increased yields, by the new, advanced methods, on Al2O3 columns. The elution was performed continuously, in one phase of each process, at ambient conditions, with the several different original hexane-toluene gradients. Various separation systems were used previously. The unique and the main, dominant absorption maxima of the purified higher fullerenes were registered in the spectral regions where they intensively absorb, applying the IR and UV/VIS techniques. All the observed absorption bands are in excellent agreement with theoretical calculations, indicating the achieved advancement in chromatographic separation and spectroscopic characterization. The isolated fullerenes are important for investigation of their remarkable optical and electronic properties, as well as for the numerous possible applications in chemistry, physics, biomedicine, diagnostic and therapeutic agents, sensors, polymers, nanophotonic materials, special lenses, optical limiting, organic field effect transistors, solar cells etc.
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Affiliation(s)
| | - Dj Koruga
- Department of Biomedical Engineering, Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade, Serbia.
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14
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Fani N, Tone EB, Phifer J, Norrholm SD, Bradley B, Ressler KJ, Kamkwalala A, Jovanovic T. Attention bias toward threat is associated with exaggerated fear expression and impaired extinction in PTSD. Psychol Med 2012; 42:533-543. [PMID: 21854700 PMCID: PMC3690118 DOI: 10.1017/s0033291711001565] [Citation(s) in RCA: 166] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Post-traumatic stress disorder (PTSD) develops in a minority of traumatized individuals. Attention biases to threat and abnormalities in fear learning and extinction are processes likely to play a critical role in the creation and/or maintenance of PTSD symptomatology. However, the relationship between these processes has not been established, particularly in highly traumatized populations; understanding their interaction can help inform neural network models and treatments for PTSD. METHOD Attention biases were measured using a dot probe task modified for use with our population; task stimuli included photographs of angry facial expressions, which are emotionally salient threat signals. A fear-potentiated startle paradigm was employed to measure atypical physiological response during acquisition and extinction phases of fear learning. These measures were administered to a sample of 64 minority (largely African American), highly traumatized individuals with and without PTSD. RESULTS Participants with PTSD demonstrated attention biases toward threat; this attentional style was associated with exaggerated startle response during fear learning and early and middle phases of extinction, even after accounting for the effects of trauma exposure. CONCLUSIONS Our findings indicate that an attentional bias toward threat is associated with abnormalities in 'fear load' in PTSD, providing seminal evidence for an interaction between these two processes. Future research combining these behavioral and psychophysiological techniques with neuroimaging will be useful toward addressing how one process may modulate the other and understanding whether these phenomena are manifestations of dysfunction within a shared neural network. Ultimately, this may serve to inform PTSD treatments specifically designed to correct these atypical processes.
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Affiliation(s)
- N Fani
- Department of Psychology, Georgia State University, Atlanta, GA, USA.
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15
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Mitrovic-Jovanovic A, Dragojevic-Dikic S, Zamurovic M, Nikolic B, Gojnic M, Rakic S, Jovanovic T. Comparison of electrolytic status (Na+, K+, Ca2+, Mg2+) in preterm and term deliveries. CLIN EXP OBSTET GYN 2012; 39:479-482. [PMID: 23444748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
PURPOSE OF INVESTIGATION The objective of this study was to evaluate the electrolytic status of Na+, K+, Ca+, and Mg2+ in serum and red blood cells in idiopathic preterm and term deliveries. METHODS The study included 105 pregnant women diagnosed with idiopathic premature delivery (study group) and 36 pregnant women with physiologically term delivery (controls). Samples of mother's blood were collected and analyzed for the level of electrolytes in the serum/plasma and red blood cells. RESULTS Measured values of magnesium in red blood cells in the study group were far lower than physiological values, intracellular calcium levels were higher in the study group compared to levels measured in the controls. Sodium concentrations in cells were significantly lower in subjects with premature delivery. CONCLUSION The magnesium intracellular level is the best representative value of magnesium in the body.
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Affiliation(s)
- A Mitrovic-Jovanovic
- University Clinic of Gynecology and Obstetrics Narodni Front, School of Medicine, Belgrade, Serbia.
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16
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Bogdanovic G, Andric N, Stanic B, Canadanovic-Brunet J, Spasic M, Jovanovic T, Baltic V. 238 The effects of proanthocyanidins on cardiotoxic and antitumour activity of doxorubicin. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)71045-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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17
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Kitic D, Zlatkovic B, Palic R, Jovanovic T, Ristic M. Fatty acids of some plants of the genus Calamintha. Chem Nat Compd 2009. [DOI: 10.1007/s10600-009-9295-0] [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]
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19
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Abstract
INTRODUCTION Recent studies suggest that some viruses, including human cytomegalovirus (CMV), may be involved in the pathogenesis of periapical lesions. Since periapical cysts (PCs) represent the next stage in the evolution of periapical granuloma, it seemed reasonable to investigate the presence of CMV in PCs and any possible relationship between its presence and the clinical features of those cysts, as well as to compare the results obtained with corresponding findings in non-inflammatory lesions, like odontogenic keratocysts (OKCs). METHODS Samples of 33 PCs and 10 OKCs, obtained at the time of surgery, were used for the detection of CMV DNA by polymerase chain reaction. Presence of the virus was correlated with clinical and radiographic features of the cysts. RESULTS CMV was detected in 18 PCs (54.5%) and six OKCs (60%). The presence of CMV was more frequent in cyst samples collected from patients who reported previous episodes of acute infection. The presence of sinus tract was more frequent in CMV-positive cysts and CMV presence was less frequent in a group of cysts showing signs of acute inflammation at the time of sample collection. The mean sizes of CMV-positive and CMV-negative PCs were almost the same; CMV-positive OKCs were slightly larger than CMV-negative OKCs. None of these results proved to be statistically significant. CONCLUSION The presence of CMV in the cystic wall is a common feature of both inflammatory and non-inflammatory odontogenic cysts. Although this study has not proved that CMV affects pathogenesis of odontogenic cysts, such a possibility could not be ruled out.
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Affiliation(s)
- M Andric
- Clinic of Oral Surgery, School of Dentistry, University of Belgrade, Belgrade, Serbia.
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Lazarevic I, Cupic M, Delic D, Svirtlih NS, Simonovic J, Jovanovic T. Distribution of HBV genotypes, subgenotypes and HBsAg subtypes among chronically infected patients in Serbia. Arch Virol 2007; 152:2017-25. [PMID: 17680327 DOI: 10.1007/s00705-007-1031-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2007] [Accepted: 06/12/2007] [Indexed: 12/17/2022]
Abstract
Hepatitis B virus (HBV) has been classified into eight genotypes (some of them further divided into two or more subgenotypes) and nine HBsAg subtypes, distinctly distributed geographically. The aim of this study was to gain insight into the distribution of HBV genotypes, subgenotypes and HBsAg subtypes among HBV chronically infected patients in Serbia, since there were no previously published data on this subject. Eighty-nine plasma samples that gave a positive result in a nested PCR were included for genotype identification. Genotyping was performed by direct sequencing of the part of the S/pol gene, and the HBsAg subtype was deduced from the HBsAg sequence. Two HBV genotypes, A and D, were encountered in Serbia, with genotype D (D - 82%, A - 18%) and subgenotype D3 (47.9%) being prevalent. Genotype D isolates had three assigned subtypes (ayw2, ayw3, ayw4), with ayw2 found to be the most prevalent (ayw2 - 53.4%, ayw3 - 43.8%, ayw4 - 1.4%). Genotype A isolates belonged to the A2 subgenotype and the HBsAg subtype adw2, as expected for samples from European population. The results correspond to country's geographical position, being in close proximity to the Mediterranean basin and on the main route between the Middle East and Central Europe.
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Affiliation(s)
- I Lazarevic
- School of Medicine, Institute of Microbiology and Immunology, University of Belgrade, Belgrade, Serbia.
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Jeremic P, Dimitrijevic M, Jovanovic T, Knezevic A. P.229 Human papillomavirus association with the oral cavity and oropharynx carcinoma. J Craniomaxillofac Surg 2006. [DOI: 10.1016/s1010-5182(06)60737-3] [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: 11/15/2022] Open
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22
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Nedeljkovic J, Mitrovic J, Jovanovic T. Influenza surveillance in Serbia: use of rapid cell culture assay. J Clin Virol 2006. [DOI: 10.1016/s1386-6532(06)80823-1] [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: 11/24/2022]
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Vukicevic-Radic O, Matic R, Vujadinovic T, Jovanovic T, Kataranovski D. Spatial Distribution of Apodemus Flavicollisand A. Agrariusin a Forest Community Quercetum-Petraeaon Mt. Avala (Serbia). BIOTECHNOL BIOTEC EQ 2006. [DOI: 10.1080/13102818.2006.10817305] [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: 10/25/2022] Open
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24
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Jovanovic T, Brkic P, Mitrovic A, Popovic D. Tu-P7:78 Experimental atherosclerosis and the effects of hyperbaric oxygen treatment. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80786-5] [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: 11/25/2022]
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Criddle RS, Hansen LD, Smith BN, Macfarlane C, Church JN, Thygerson T, Jovanovic T, Booth T. Thermodynamic law for adaptation of plants to environmental temperatures. PURE APPL CHEM 2005. [DOI: 10.1351/pac200577081425] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A thermodynamic law of adaptation of plants to temperature is developed. Plant growth rate is proportional to the product of the metabolic rate and the metabolic efficiency for production of anabolic products. Over much of the growth temperature range, metabolic rate is proportional to mean temperature and efficiency is proportional to the reciprocal of temperature variability. The mean temperature and short-term (hours to weeks) variability of temperature during the growth season at a particular location thus determine the optimum energy and growth strategy for plants. Because they can grow and reproduce most vigorously, plants with a growth rate vs. temperature curve that matches the time-at-temperature vs. temperature curve during the growth season are favored by natural selection. The law of temperature adaptation explains many recent and long-standing observations of plant growth and survival, including latitudinal gradients of plant diversity and species range.
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Affiliation(s)
- Richard S. Criddle
- 1Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
| | - L. D. Hansen
- 1Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
| | - B. N. Smith
- 2Department of Plant and Animal Sciences, Brigham Young University, Provo, UT 84602, USA
| | - C. Macfarlane
- 3School of Plant Biology, The University of West Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - J. N. Church
- 4Department of Pomology, University of California, Davis, CA 95616 USA
| | - T. Thygerson
- 2Department of Plant and Animal Sciences, Brigham Young University, Provo, UT 84602, USA
| | - T. Jovanovic
- 5CSIRO Forestry and Forest Products, Kingston, ACT 2604, Australia
| | - T. Booth
- 5CSIRO Forestry and Forest Products, Kingston, ACT 2604, Australia
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Perovic MV, Berisavac MJ, Kuljic-Kapulica N, Jovanovic T. High-risk human papillomavirus (HPV) types in patients with squamous intraepithelial lesions (SIL). EUR J GYNAECOL ONCOL 2003; 24:178-80. [PMID: 12701974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
The aim of the paper was to determine the probability of joined occurrence of certain HPV types, particularly those with high oncogenic risk and histopathological (HP) findings (LGSIL and HGSIL, i.e., micro invasive and invasive carcinoma) as well as to find out to what extent either presence or absence of HPV can be identified in HP findings. The investigation was carried out on 48 patients. Based on a suspected colposcopy findings, Papanicolaou (Pap) smear and biopsy were performed and a histopathological analysis of the sample was carried out. A cervical smear was made on all the patients for HPV detection and typing. The results in the group with HPV, which showed histological diagnoses of LGSIL in 80% of cases, revealed numbers significantly higher with respect to the same summing up in the group where HPV was not detected (66.6%). HP findings of HGSIL in both groups were diagnosed in almost the same percentage and it should be taken into account that there were 6.7% of patients with Ca in situ in the group of HPV-positive patients. Therefore, it can be concluded that if a diagnosis of LGSIL or HGSIL, in particular, has been made on the basis of HP findings there is a great probability that it is a case of infection by one or more joined types of human papillomaviruses. The presence of virus specific genes in one of the stages of tumor development at the beginning of the infection indicates the viral etiology of tumors. The presence of HPV genome was not proved in 21% of patients with HGSIL. A multiple infection with different HPV types is more often found in patients with LGSIL than in those diagnosed with HGSIL. This demonstrates the selection of high oncogenic types and their persistence during the course of carcinoma progression.
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Affiliation(s)
- M V Perovic
- Institute of Obstetrics and Gynaecology, University Clinical Centre of Serbia, Yugoslavia
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Perovic M, Berisavac M, Kuljic-Kapulica N, Jovanovic T. Correlation between atypical colposcopy findings and detection of human papillomavirus (HPV) infection of the uterine cervix. EUR J GYNAECOL ONCOL 2002; 23:42-4. [PMID: 11876390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Reports on the detection of genome human papillomaviruses (HPV) in genital neoplasia differ to a great extent either in the overall prevalence or in the frequency of certain types. The aim of the study was to determine the correlation between the HPV infection and the occurrence of premalignant and malignant diseases of the uterine cervix and to investigate the ratio between clinical features and infection findings starting from the assumption that infection by human papillomaviruses is a key factor in the occurrence of premalignant and malignant disease of the uterine cervix. The investigation was carried out on 48 patients who formed the study group (Group I). Based on suspicious colposcopy findings, a Papanicolaou (Pap) smear and biopsy were performed and a histopathological analysis of the sample was carried out. A cervical smear was done on all the patients for HPV detection and typing. The patients in whom HPV infection was not found formed a control group (C Group). In spite of certain divergences it has not been proved that the ratio between colposcopy findings and HPV type has any statistical importance (chi2 = 3.305; p > 0.05). The distribution of Pap smear results did not shown a significant difference with respect to HPV type (chi2 = 0.105; p > 0.05). When the data are analyzed the diagnosis of low-grade squamous intraepithelial lesions (LGSIL) is evident in 20% of the HPV cases whereas it is significantly lower with respect to the group where HPV was not detected (42.5%). Histopathological (HP) findings of a high-grade squamous intraepithelial lesions (HGSIL) in both groups are diagnosed in approximately the same percentage while 6.7% of cancer in situ was registered in the group of HPV positive patients. Based on this it can be concluded that if a diagnosis of LGSIL or HGSIL in particular has been made on the basis of HP findings there is a great probability that the infection was due to one or more joined types of human papillomaviruses.
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Affiliation(s)
- M Perovic
- Institute of Obstetrics and Gynaecology, University Clinical Centre of Serbia, Belgrade, Yugoslavia
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Abstract
BACKGROUND the structural proteins of rubella virus, the capsid protein C and the envelope glycoproteins E1 and E2 were produced in lepidopteran insect cells using baculovirus expression vectors. The C-terminal ends of the corresponding proteins were fused to a polyhistidine tag for easy and gentle purification by metal ion affinity chromatography. OBJECTIVES to investigate the maturation of natural and vaccinal IgG avidity against individual authentic and recombinant rubella virus (RV) structural proteins. STUDY DESIGN the analysis was carried out using a modified immunoblotting technique where the purified baculovirus-expressed proteins were compared with authentic rubella virus proteins. Altogether, 47 well-characterised serum samples from both naturally infected patients and vaccines were studied. RESULTS after natural RV infection, IgG antibodies specific for the E1 protein were predominant not only in terms of levels, but also in terms of rate and magnitude of avidity maturation. The avidity development of the IgG antibodies was much slower in vaccines than in patients after a natural RV infection. CONCLUSIONS together, our results indicate that IgG avidity determination in conjunction with immunoblot analysis is useful in the diagnosis of a RV infection. The recombinant proteins showed similar reactivity patterns in the immunoblot analyses as compared with the authentic viral structural proteins, suggesting suitability for serodiagnostics.
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Affiliation(s)
- J Nedeljkovic
- Institute of Immunology and Virology, Torlak, Belgrade, Yugoslavia
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Abstract
This study explored the effects of restraint by females other than the mother on the vocalizations of infant rhesus macaques (Macaca mulatta) in a captive social setting. In this species, females are very attracted to young infants and will frequently approach, groom, and hold the infant. Incompetent handling, abusive behavior, or extended periods away from the mother that prevent the infants from nursing represent potentially significant risks for infants. Vocal responses to such risky conditions appear to be the infants' only means to promote a return to their mothers. We examined the association between the severity of the threat posed to the infant and the nature of its vocal response to restraint, and whether the infants' calls influenced the behavior of their mothers or captors. The results suggest that situations posing greater risks for the infants, i.e., longer periods of restraint, were associated with a greater use of noisy screams. Furthermore, mothers' responding was associated with a greater use of noisy screams as well. The mothers' reactions, however, could be described as cautious, and consisted mostly of closer monitoring; such tempered response might be related to the risk of injury to the infant that could result from a more forceful and direct attempt at retrieval.
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Affiliation(s)
- T Jovanovic
- Department of Psychology, Emory University, Atlanta, Georgia 30322, USA.
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Booth TH, Jovanovic T, Old KM, Dudzinski MJ. Climatic mapping to identify high-risk areas for Cylindrocladium quinqueseptatum leaf blight on eucalypts in mainland South East Asia and around the world. Environ Pollut 2000; 108:365-372. [PMID: 15092931 DOI: 10.1016/s0269-7491(99)00215-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/1998] [Accepted: 07/09/1999] [Indexed: 05/24/2023]
Abstract
Cylindrocladium quinqueseptatum is a pathogen on a wide range of hosts. It affects at least 20 species of eucalypts and is an important causal agent of leaf blight of Eucalyptus camaldulensis in central and southern Vietnam. Results from previous studies and observations of broadscale infection patterns in mainland South East Asia were used to derive simple rules (i.e. mean minimum temperature of coldest month > or =16 degrees C and mean annual precipitation > or =1400 mm) to identify locations which are likely to have a high risk of C. quinqueseptatum leaf blight (CqLB). Climatic mapping programs, which include interpolated climatic data estimated for numerous locations, were used to map these high risk areas in Africa, Australia and Latin America as well as in South East Asia. The predicted high-risk areas included several regions where CqLB has already been reported and the maps generated suggested other areas which may be at risk under present climatic conditions given the presence of C. quinqueseptatum and susceptible hosts. Some simple climate change scenarios were also used to suggest areas in mainland South East Asia which may become vulnerable to CqLB over the next 50 years. It is concluded that climatic mapping programs can assist the broadscale evaluation of risk of CqLB infections, although it is recognised that more detailed models and survey information are also needed.
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Affiliation(s)
- T H Booth
- CSIRO Forestry and Forest Products, PO Box E4008, Kingston, Canberra, ACT 2604, Australia.
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Abstract
This study investigated the relation between crying and infant abuse in group-living rhesus monkeys (Macaca mulatta). The subjects were 10 abusive mothers with their infants and 10 control mother-infant pairs. Abused infants cried more frequently than controls in the first 12 weeks of life, even when cries immediately following abuse were excluded from the analysis. The coos of 5 abused infants differed from those of 5 controls in several acoustic parameters, whereas their screams and geckers were acoustically similar, when recorded in the same context. Abusive mothers were less likely than control mothers to respond positively to the cries of their infants. Although infant cries may increase the probability of abuse being repeated, infant crying per se does not appear to be a major determinant of abuse.
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Affiliation(s)
- D Maestripieri
- Committee on Human Development, University of Chicago, IL 60637, USA.
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Nedeljkovic J, Jovanovic T, Mladjenovic S, Hedman K, Peitsaro N, Oker-Blom C. Immunoblot analysis of natural and vaccine-induced IgG responses to rubella virus proteins expressed in insect cells. J Clin Virol 1999; 14:119-31. [PMID: 10588454 DOI: 10.1016/s1386-6532(99)00048-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND The three structural proteins of rubella virus (RV), the capsid protein C and the envelope glycoproteins E1 and E2, were produced individually in soluble form in Sf9 insect cells using the baculovirus system. All proteins were equipped with a polyhistidine tag at their C-terminal ends to enable gentle purification by metal ion affinity chromatography. In addition, the E1 and E2 proteins were engineered to display the FLAG epitope tag at their N-terminal ends. STUDY DESIGN The diagnostic potential of the recombinant purified proteins was evaluated by immunoblot and enzyme immuno assays (EIA) using a total of 57 well-characterised serum samples obtained at various time points after natural RV infection, congenital rubella syndrome (CRS), MMR vaccination or from controls with past RV immunity. In addition, acute and convalescent phase serum pools from a total of 20 patients were evaluated. Authentic RV proteins were used as a reference. RESULTS The recombinant E1 and C proteins were predominant in eliciting the immune response in both postnatal and vaccinal RV infections, being much weaker in the vaccinal ones. The IgG response to the recombinant C protein was very strong after the first month post infection and decreased with time. The immune response against the recombinant E2 protein, however, was generally poor, but notably stronger after congenital infection. Together, the results showed that the individual recombinant protein antigens could be suitable for diagnosis of RV infection and for study of the immune response to rubella vaccination.
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Affiliation(s)
- J Nedeljkovic
- Institute of Immunology and Virology-Torlak, Belgrade, Yugoslavia
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Kataranovski M, Kataranovski D, Savic D, Jovcic G, Bogdanovic Z, Jovanovic T. Granulocyte and plasma cytokine activity in acute cadmium intoxication in rats. Physiol Res 1999; 47:453-61. [PMID: 10453753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023] Open
Abstract
Changes in the number and ex vivo function of peripheral blood neutrophils were investigated following intraperitoneal administration of cadmium-chloride in rats. Besides a dose-dependent increase in the number of peripheral blood neutrophils, changes were found in the functional state of isolated polymorphonuclear leukocytes (PMNs). Increased spontaneous adhesion and activation, and TNF activity in a conditioned medium were observed in cultures of granulocytes in comparison to granulocytes from control (saline-treated) animals. Increased levels of plasma activity of inflammatory cytokines, tumor necrosis factor (TNF) and interleukin-6 (IL-6) were noted following cadmium administration. Cytological signs of pulmonary inflammation were revealed histologically and the majority of neutrophils recovered from the lungs by enzyme digestion exhibited a capacity of nitroblue tetrazolium (NBT) reduction. Our data demonstrate that acute cadmium intoxication leads to a systemic inflammatory response characterized by numerical and functional changes in the granulocyte compartment and to increased levels of inflammation-related cytokine activity in the circulation. Correlations between the increased number of peripheral blood neutrophils and IL-6 plasma activity (r=0.776, p<0.00001) and the number of neutrophils recovered from the lung tissue (r=0.893, p<0.00001) suggested that systemic cadmium-induced inflammation might be involved in the pulmonary toxicity of cadmium.
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Affiliation(s)
- M Kataranovski
- Institute for Medical Research, Military Medical Academy, Belgrade, Yugoslavia
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Blagojevic B, Jovanovic T, Blagojevic M, Randjelovic N, Djordjevic M, Catic A, Rudan R, Miljkovic I. Microelements in plant material of a kind gender Achillea L. Toxicol Lett 1998. [DOI: 10.1016/s0378-4274(98)80923-5] [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: 11/26/2022]
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Minic J, Petrovic B, Minic S, Jovanovic T. Interleukin-1, interleukin-6 and tumor necrosis factor activity in thermal injured rats. Pathophysiology 1998. [DOI: 10.1016/s0928-4680(98)80901-2] [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: 10/18/2022] Open
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Affiliation(s)
- D Minic
- Faculty of Physical Chemistry, University of Belgrade, Yugoslavia
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Petkovic D, Pavlovic M, Jovanovic T, Panic-Drzajic V, Zdjelar K, Unkovic S, Matejevic D, Alekisic N, Cvetkovic M. Neutralization of the activity of vipera ammodytes ammodytes snake venom on myocardium of rats by antitoxinum viperinum: a histopathological study. J Toxicol Clin Exp 1991; 11:343-7. [PMID: 1818120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Antitoxinum viperinum was tested for its ability to prevent alteration of the myocardium induced by Vipera ammodytes ammodytes venom. Antivenom was injected intraperitoneally either immediately, 30 min or 2 hr after the intraperitoneal injection of venom. The light microscopic examination showed that the antiserum neutralized the effects of venom and antivenom might be useful in treating V.a. ammodytes venom poisoning.
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Affiliation(s)
- D Petkovic
- Department of Physiology, Faculty of Medicine, Belgrade, Yugoslavia
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Jovanovic T, Mostarica M, Behbehani K, Lukic ML. Neuroimmunopathology of HSV-I infection in two strains of rats differing in CD4+: CD8+ T cells ratios and IL-2 production. Transplant Proc 1990; 22:2584-5. [PMID: 2124741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- T Jovanovic
- Institute of Microbiology and Immunology Faculty of Medicine University of Belgrade, Yugoslavia
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Rolovic Z, Jovanovic T, Stankovic Z, Marinkovic N. Abnormal megakaryocytopoiesis in the Belgrade laboratory rat. Blood 1985; 65:60-4. [PMID: 3965052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The Belgrade laboratory rat (b/b rat) has hereditary, hypochromic, microcytic anemia with a variety of red cell abnormalities. Although this anemic syndrome has been recently ascribed to the defective delivery of iron to the developing red cell, the basic hematopoietic defect is still unknown. In this article we present evidence that the b/b rat has an additional hematologic defect. We have found that the megakaryocyte number in the marrow of the b/b rat is decreased to one half that of the normal rat, but the maturation rate of recognizable megakaryocytes is accelerated and the size is increased. The platelet count is moderately reduced. These findings indicate that megakaryocytopoiesis in the anemic b/b rat is abnormal and suggest that the genetic defect may involve the progenitors of the megakaryocyte cell lineage. Alternatively, the megakaryocytic abnormalities may be secondary to the severe anemia.
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