1
|
Wang H, Zhang Y, Cheng H, Yan F, Song D, Wang Q, Cai S, Wang Y, Huang L. Selective corticocortical connectivity suppression during propofol-induced anesthesia in healthy volunteers. Cogn Neurodyn 2022; 16:1029-1043. [PMID: 36237410 PMCID: PMC9508318 DOI: 10.1007/s11571-021-09775-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 11/17/2021] [Accepted: 12/13/2021] [Indexed: 11/03/2022] Open
Abstract
We comprehensively studied directional feedback and feedforward connectivity to explore potential connectivity changes that underlie propofol-induced deep sedation. We further investigated the corticocortical connectivity patterns within and between hemispheres. Sixty-channel electroencephalographic data were collected from 19 healthy volunteers in a resting wakefulness state and propofol-induced deep unconsciousness state defined by a bispectral index value of 40. A source analysis was employed to locate cortical activity. The Desikan-Killiany atlas was used to partition cortices, and directional functional connectivity was assessed by normalized symbolic transfer entropy between higher-order (prefrontal and frontal) and lower-order (auditory, sensorimotor and visual) cortices and between hot-spot frontal and parietal cortices. We found that propofol significantly suppressed feedforward connectivity from the left parietal to right frontal cortex and bidirectional connectivity between the left frontal and left parietal cortex, between the frontal and auditory cortex, and between the frontal and sensorimotor cortex. However, there were no significant changes in either feedforward or feedback connectivity between the prefrontal and all the lower-order cortices and between the frontal and visual cortices or in feedback connectivity from the frontal to parietal cortex. Propofol anesthetic selectively decreased the unidirectional interaction between higher-order frontoparietal cortices and bidirectional interactions between the higher-order frontal cortex and lower-order auditory and sensorimotor cortices, which indicated that both feedback and feedforward connectivity were suppressed under propofol-induced deep sedation. Our findings provide critical insights into the connectivity changes underlying the top-down mechanism of propofol anesthesia at deep sedation. Supplementary Information The online version contains supplementary material available at 10.1007/s11571-021-09775-x.
Collapse
Affiliation(s)
- Haidong Wang
- School of Life Science and Technology, Xidian University, No. 2 South Taibai Road, Xi’an, 710071 China
| | - Yun Zhang
- School of Life Science and Technology, Xidian University, No. 2 South Taibai Road, Xi’an, 710071 China
| | - Huanhuan Cheng
- School of Life Science and Technology, Xidian University, No. 2 South Taibai Road, Xi’an, 710071 China
| | - Fei Yan
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi’an Jiaotong University, No. 277 West Yanta Road, Xi’an, 710061 China
| | - Dawei Song
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi’an Jiaotong University, No. 277 West Yanta Road, Xi’an, 710061 China
| | - Qiang Wang
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi’an Jiaotong University, No. 277 West Yanta Road, Xi’an, 710061 China
| | - Suping Cai
- School of Life Science and Technology, Xidian University, No. 2 South Taibai Road, Xi’an, 710071 China
| | - Yubo Wang
- School of Life Science and Technology, Xidian University, No. 2 South Taibai Road, Xi’an, 710071 China
| | - Liyu Huang
- School of Life Science and Technology, Xidian University, No. 2 South Taibai Road, Xi’an, 710071 China
| |
Collapse
|
2
|
Messina A, Boiti A, Vallortigara G. Asymmetric distribution of pallial‐expressed genes in zebrafish (
Danio rerio
). Eur J Neurosci 2020; 53:362-375. [DOI: 10.1111/ejn.14914] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/10/2020] [Accepted: 07/11/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Andrea Messina
- Center for Mind/Brain Sciences University of Trento Rovereto Italy
| | - Alessandra Boiti
- Center for Mind/Brain Sciences University of Trento Rovereto Italy
| | | |
Collapse
|
3
|
Developmental regulation and lateralization of GABA receptors in the rat hippocampus. Int J Dev Neurosci 2019; 76:86-94. [DOI: 10.1016/j.ijdevneu.2019.07.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
|
4
|
Khoshdel-Sarkarizi H, Hami J, Mohammadipour A, Sadr-Nabavi A, Mahmoudi M, Kheradmand H, Peyvandi M, Nourmohammadi E, Haghir H. WITHDRAWN: Developmental regulation and lateralization of GABA receptors in the rat hippocampus. Int J Dev Neurosci 2019; 76:52-60. [PMID: 30630073 DOI: 10.1016/j.ijdevneu.2019.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 12/25/2018] [Accepted: 01/04/2019] [Indexed: 12/30/2022] Open
Affiliation(s)
- Hoda Khoshdel-Sarkarizi
- Department of Anatomy and Cell Biology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Javad Hami
- Department of Anatomical Sciences, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Abbas Mohammadipour
- Department of Anatomy and Cell Biology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ariane Sadr-Nabavi
- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Medical Genetic Research Center (MGRC), Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahmoud Mahmoudi
- Immunology Research center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamed Kheradmand
- Hazrat Rasoul Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mostafa Peyvandi
- Department of Anatomy and Cell Biology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Esmail Nourmohammadi
- Department of Medical Biotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Haghir
- Department of Anatomy and Cell Biology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Medical Genetic Research Center (MGRC), Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| |
Collapse
|
5
|
Grabrucker S, Haderspeck JC, Sauer AK, Kittelberger N, Asoglu H, Abaei A, Rasche V, Schön M, Boeckers TM, Grabrucker AM. Brain Lateralization in Mice Is Associated with Zinc Signaling and Altered in Prenatal Zinc Deficient Mice That Display Features of Autism Spectrum Disorder. Front Mol Neurosci 2018; 10:450. [PMID: 29379414 PMCID: PMC5775238 DOI: 10.3389/fnmol.2017.00450] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 12/22/2017] [Indexed: 11/13/2022] Open
Abstract
A number of studies have reported changes in the hemispheric dominance in autism spectrum disorder (ASD) patients on functional, biochemical, and morphological level. Since asymmetry of the brain is also found in many vertebrates, we analyzed whether prenatal zinc deficient (PZD) mice, a mouse model with ASD like behavior, show alterations regarding brain lateralization on molecular and behavioral level. Our results show that hemisphere-specific expression of marker genes is abolished in PZD mice on mRNA and protein level. Using magnetic resonance imaging, we found an increased striatal volume in PZD mice with no change in total brain volume. Moreover, behavioral patterns associated with striatal lateralization are altered and the lateralized expression of dopamine receptor 1 (DR1) in the striatum of PZD mice was changed. We conclude that zinc signaling during brain development has a critical role in the establishment of brain lateralization in mice.
Collapse
Affiliation(s)
- Stefanie Grabrucker
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany.,Cellular Neurobiology and Neuro-Nanotechnology Laboratory, Department of Biological Sciences, University of Limerick, Limerick, Ireland
| | - Jasmin C Haderspeck
- WG Molecular Analysis of Synaptopathies, Neurology Department, Neurocenter of Ulm University, Ulm, Germany
| | - Ann Katrin Sauer
- Cellular Neurobiology and Neuro-Nanotechnology Laboratory, Department of Biological Sciences, University of Limerick, Limerick, Ireland.,WG Molecular Analysis of Synaptopathies, Neurology Department, Neurocenter of Ulm University, Ulm, Germany
| | - Nadine Kittelberger
- WG Molecular Analysis of Synaptopathies, Neurology Department, Neurocenter of Ulm University, Ulm, Germany
| | - Harun Asoglu
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Alireza Abaei
- Core Facility Small Animal Imaging, Ulm University, Ulm, Germany
| | - Volker Rasche
- Core Facility Small Animal Imaging, Ulm University, Ulm, Germany.,Department of Internal Medicine II, Ulm University Medical Center, Ulm, Germany
| | - Michael Schön
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Tobias M Boeckers
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Andreas M Grabrucker
- Cellular Neurobiology and Neuro-Nanotechnology Laboratory, Department of Biological Sciences, University of Limerick, Limerick, Ireland.,Bernal Institute, University of Limerick, Limerick, Ireland.,Health Research Institute (HRI), University of Limerick, Limerick, Ireland
| |
Collapse
|
6
|
Arbo BD, Andrade S, Osterkamp G, Gomez R, Ribeiro MF. Asymmetric effects of low doses of progesterone on GABA(A) receptor α4 subunit protein expression in the olfactory bulb of female rats. Can J Physiol Pharmacol 2014; 92:1045-9. [DOI: 10.1139/cjpp-2014-0307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to evaluate the effect of progesterone on the protein expression of α4 subunit of GABA(A) receptor, serotonin transporter (SERT), Akt, Erk, and caspase-3 in the olfactory bulb (OB) of female rats exposed to the forced swimming test (FST). Female rats were injected daily with progesterone (0.4 mg/kg body mass) or vehicle during 2 complete oestrous cycles and exposed to the FST, and the protein expression of GABA(A) receptor α4 subunit, SERT, Akt, Erk, and caspase-3 in the OB were evaluated. Progesterone increased the expression of the α4 subunit in the right OB and decreased its expression in the left OB, although it did not change the expression of other proteins. In summary, our findings indicate that progesterone has an asymmetric modulatory effect on the expression of GABA(A) receptor α4 subunit in the OB. This effect could be related to the antidepressant-like effect of progesterone in female rats.
Collapse
Affiliation(s)
- Bruno D. Arbo
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS – Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite 500, Porto Alegre, RS 90050-170, Brazil
| | - Susie Andrade
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS – Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite 500, Porto Alegre, RS 90050-170, Brazil
| | - Gabriela Osterkamp
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS – Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite 500, Porto Alegre, RS 90050-170, Brazil
| | - Rosane Gomez
- Department of Pharmacology, ICBS – Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite 500, Porto Alegre, RS 90050-170, Brazil
| | - Maria Flávia Ribeiro
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS – Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite 500, Porto Alegre, RS 90050-170, Brazil
| |
Collapse
|
7
|
Soria G, Tudela R, Márquez-Martín A, Camón L, Batalle D, Muñoz-Moreno E, Eixarch E, Puig J, Pedraza S, Vila E, Prats-Galino A, Planas AM. The ins and outs of the BCCAo model for chronic hypoperfusion: a multimodal and longitudinal MRI approach. PLoS One 2013; 8:e74631. [PMID: 24058609 PMCID: PMC3776744 DOI: 10.1371/journal.pone.0074631] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 08/05/2013] [Indexed: 02/06/2023] Open
Abstract
Cerebral hypoperfusion induced by bilateral common carotid artery occlusion (BCCAo) in rodents has been proposed as an experimental model of white matter damage and vascular dementia. However, the histopathological and behavioral alterations reported in this model are variable and a full characterization of the dynamic alterations is not available. Here we implemented a longitudinal multimodal magnetic resonance imaging (MRI) design, including time-of-flight angiography, high resolution T1-weighted images, T2 relaxometry mapping, diffusion tensor imaging, and cerebral blood flow measurements up to 12 weeks after BCCAo or sham-operation in Wistar rats. Changes in MRI were related to behavioral performance in executive function tasks and histopathological alterations in the same animals. MRI frequently (70%) showed various degrees of acute ischemic lesions, ranging from very small to large subcortical infarctions. Independently, delayed MRI changes were also apparent. The patterns of MRI alterations were related to either ischemic necrosis or gliosis. Progressive microstructural changes revealed by diffusion tensor imaging in white matter were confirmed by observation of myelinated fiber degeneration, including severe optic tract degeneration. The latter interfered with the visually cued learning paradigms used to test executive functions. Independently of brain damage, BCCAo induced progressive arteriogenesis in the vertebrobasilar tree, a process that was associated with blood flow recovery after 12 weeks. The structural alterations found in the basilar artery were compatible with compensatory adaptive changes driven by shear stress. In summary, BCCAo in rats induces specific signatures in multimodal MRI that are compatible with various types of histological lesion and with marked adaptive arteriogenesis.
Collapse
Affiliation(s)
- Guadalupe Soria
- Experimental T MRI Unit, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Department of Brain Ischemia and Neurodegeneration, Institut d’Investigacions Biomèdiques de Barcelona (IIBB), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
- * E-mail:
| | - Raúl Tudela
- Experimental T MRI Unit, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Group of Biomedical Imaging of the University of Barcelona, Barcelona, Spain
| | - Ana Márquez-Martín
- Departament de Farmacologia, Terapèutica i Toxicologia, Institut de Neurociències, Facultat de Medicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Lluïsa Camón
- Department of Brain Ischemia and Neurodegeneration, Institut d’Investigacions Biomèdiques de Barcelona (IIBB), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
| | - Dafnis Batalle
- Fetal and Perinatal Medicine Research Group, Institut d’Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Emma Muñoz-Moreno
- Fetal and Perinatal Medicine Research Group, Institut d’Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Elisenda Eixarch
- Fetal and Perinatal Medicine Research Group, Institut d’Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Josep Puig
- IDI, Radiology Department, Hospital Universitario Dr. Josep Trueta. IDIBGI. Universitat de Girona, Girona, Spain
| | - Salvador Pedraza
- IDI, Radiology Department, Hospital Universitario Dr. Josep Trueta. IDIBGI. Universitat de Girona, Girona, Spain
| | - Elisabet Vila
- Departament de Farmacologia, Terapèutica i Toxicologia, Institut de Neurociències, Facultat de Medicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Alberto Prats-Galino
- Laboratory of Surgical Neuroanatomy (LSNA), Human Anatomy and Embryology Unit, Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain
| | - Anna M. Planas
- Department of Brain Ischemia and Neurodegeneration, Institut d’Investigacions Biomèdiques de Barcelona (IIBB), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
| |
Collapse
|
8
|
Raftogianni A, Stamatakis A, Papadopoulou A, Vougas K, Anagnostopoulos AK, Stylianopoulou F, Tsangaris GT. Effects of an early experience of reward through maternal contact or its denial on laterality of protein expression in the developing rat hippocampus. PLoS One 2012; 7:e48337. [PMID: 23118990 PMCID: PMC3485191 DOI: 10.1371/journal.pone.0048337] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 09/24/2012] [Indexed: 01/01/2023] Open
Abstract
Laterality is a basic characteristic of the brain which is detectable early in life. Although early experiences affect laterality of the mature brain, there are no reports on their immediate neurochemical effects during neonatal life, which could provide evidence as to the mechanisms leading to the lateralized brain. In order to address this issue, we determined the differential protein expression profile of the left and right hippocampus of 13-day-old rat control (CTR) pups, as well as following exposure to an early experience involving either receipt (RER) or denial (DER) of the expected reward of maternal contact. Proteomic analysis was performed by 2-dimensional polyacrylamide gel electrophoresis (PAGE) followed by mass spectroscopy. The majority of proteins found to be differentially expressed either between the three experimental groups (DER, RER, CTR) or between the left and right hemisphere were cytoskeletal (34%), enzymes of energy metabolism (32%), and heat shock proteins (17%). In all three groups more proteins were up-regulated in the left compared to the right hippocampus. Tubulins were found to be most often up-regulated, always in the left hippocampus. The differential expression of β-tubulin, β-actin, dihydropyrimidinase like protein 1, glial fibrillary acidic protein (GFAP) and Heat Shock protein 70 revealed by the proteomic analysis was in general confirmed by Western blots. Exposure to the early experience affected brain asymmetry: In the RER pups the ratio of proteins up-regulated in the left hippocampus to those in the right was 1.8, while the respective ratio was 3.6 in the CTR and 3.4 in the DER. Our results could contribute to the elucidation of the cellular mechanisms mediating the effects of early experiences on the vulnerability for psychopathology, since proteins shown in our study to be differentially expressed (e.g. tubulins, dihydropyrimidinase like proteins, 14-3-3 protein, GFAP, ATP synthase, α-internexin) have also been identified in proteomic analyses of post-mortem brains from psychiatric patients.
Collapse
Affiliation(s)
- Androniki Raftogianni
- Laboratory of Biology-Biochemistry, Department of Basic Sciences, School of Health Sciences, University of Athens, Athens, Greece
| | | | | | | | | | | | | |
Collapse
|
9
|
Fitzgerald PJ. Whose side are you on: does serotonin preferentially activate the right hemisphere and norepinephrine the left? Med Hypotheses 2012; 79:250-4. [PMID: 22647616 DOI: 10.1016/j.mehy.2012.05.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2012] [Accepted: 05/02/2012] [Indexed: 10/28/2022]
Abstract
Serotonin (5-HT) and norepinephrine (NE) innervate both the left and right hemispheres of the brain, but whether they affect lateralization of function is unknown. This paper concisely examines evidence that these two neurotransmitters differentially affect the two hemispheres, and puts forth the novel hypothesis 5-HT preferentially activates the right hemisphere (RH) and NE the left hemisphere (LH). The principal lines of evidence comprise studies of: (1) 5-HT and NE level measurement, (2) receptor binding, (3) functional brain imaging, (4) dichotic listening, and (5) electroencephalography and evoked potentials. In assessing these 5 lines, emphasis is placed on studies of pharmaceutical drugs that affect the 5-HT and NE systems. While all of the data do not support the hypothesis, they are generally consistent with it, or a variant of the hypothesis that there is a bias toward 5-HT preferentially activating a majority of brain areas or functions in the RH, and NE a majority of LH areas or functions. If this hypothesis, or a variant of it, is correct, it may be relevant to understanding the physiological basis of neuropsychiatric disorders that could involve dysfunction in brain monoaminergic systems, as well as understanding potential lateralization of the effects of drugs that act on these systems.
Collapse
Affiliation(s)
- Paul J Fitzgerald
- The Zanvyl Krieger Mind/Brain Institute, Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, 338 Krieger Hall, 3400 N. Charles St., Baltimore, MD 21218, USA.
| |
Collapse
|
10
|
Interhemisphere Asymmetry of the Hippocampus and Neocortex as a Correlate of the Active and Passive Behavioral Strategies in Emotionally Negative Situations. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s11055-012-9576-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
11
|
Capper-Loup C, Kaelin-Lang A. Lateralization of dynorphin gene expression in the rat striatum. Neurosci Lett 2008; 447:106-8. [DOI: 10.1016/j.neulet.2008.09.071] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2008] [Revised: 08/25/2008] [Accepted: 09/25/2008] [Indexed: 10/21/2022]
|
12
|
Asymmetrical distributions of muscarinic receptor binding in the hippocampus of female rats. Eur J Pharmacol 2008; 588:248-50. [DOI: 10.1016/j.ejphar.2008.04.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2007] [Revised: 03/23/2008] [Accepted: 04/02/2008] [Indexed: 11/24/2022]
|
13
|
Orman R, Stewart M. Hemispheric differences in protein kinase C betaII levels in the rat amygdala: baseline asymmetry and lateralized changes associated with cue and context in a classical fear conditioning paradigm. Neuroscience 2006; 144:797-807. [PMID: 17118565 PMCID: PMC1892597 DOI: 10.1016/j.neuroscience.2006.10.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2006] [Revised: 10/10/2006] [Accepted: 10/11/2006] [Indexed: 11/20/2022]
Abstract
The amygdala is critically important for fear learning, and specific kinases have been implicated as contributors to the mechanisms that underlie learning. We examined levels of protein kinase C betaII (PKC betaII) in the left and right lateral and basolateral nuclei (LA/BLA) of the amygdala from animals that were classically fear conditioned with tones as cues and footshocks. Groups consisted of animals that received neither tones nor shocks, paired tones and shocks, or unpaired tones and shocks. At 1 h after conditioning, some animals from each group were used for biochemical measurements of PKC betaII levels and other animals were given probe trials to assess freezing behavior to cue and context. The levels of PKC betaII were greater in the left hemisphere in animals receiving neither tones nor shocks and animals receiving paired tones and shocks. PKC betaII levels were greater in the right hemisphere of animals receiving randomly presented tones and shocks. Freezing times to cue were long (>80% of probe trial time) in both the paired tone/shock and randomly unpaired tone/shock groups. Freezing times to context were long in the unpaired tone/shock group, but not the paired tone/shock group. Correlational analyses showed that freezing times to context, but not cue, precisely predicted the right/left relation of PKC betaII levels in the LA/BLA: the greater the time spent freezing to context, the greater the increase in right hemisphere PKC betaII levels. We conclude that fear conditioning causes hemisphere and input specific increases in PKC betaII in the rat LA/BLA.
Collapse
Affiliation(s)
- R Orman
- Program in Neural and Behavioral Science, Department of Physiology and Pharmacology, State University of New York, Downstate Medical Center, 450 Clarkson Avenue, Box 31, Brooklyn, NY 11203, USA
| | | |
Collapse
|
14
|
Patsoukis N, Zervoudakis G, Georgiou CD, Angelatou F, Matsokis NA, Panagopoulos NT. Effect of pentylenetetrazol-induced epileptic seizure on thiol redox state in the mouse cerebral cortex. Epilepsy Res 2004; 62:65-74. [PMID: 15519133 DOI: 10.1016/j.eplepsyres.2004.08.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2004] [Revised: 07/30/2004] [Accepted: 08/13/2004] [Indexed: 11/26/2022]
Abstract
In the present study we examined the effects of pentylenetetrazol (PTZ) administration on the thiol redox state (TRS), lipid peroxidation and protein oxidation in left and right mouse cerebral cortex in order (a) to quantitate the major components of the thiol redox state and relate them with oxidative stress and cortical laterality, and (b) to investigate whether neuronal activation without synchronization, induced by subconvulsive doses of PTZ, can cause similar qualitative effects on the thiol redox state. Specifically, we examined the TRS components [glutathione (GSH), glutathione disulfide (GSSG), cysteine (CSH), protein (P) thiols (PSH) and protein and non-protein (NP) mixed/symmetric disulfides (PSSR, NPSSR, NPSSC, PSSP)]. At 15 min after seizure, GSH, GSSG, CSH, NPSSC, PSSR and PSSC levels are decreased in left (14-50%) and right (11-53%) cortex while PSSP levels are increased in both left (1400%) and right (1600%) cortex. At 30 min after seizure, GSSG, CSH, NPSSC, PSSR and PSSC levels are decreased in left (14-51%) and right (18-56%) cortex while PSSP and protein carbonyl levels are increased in left (2300% and 20%, respectively) and right (2800% and 21%, respectively) cortex. At 24 h after seizure, the TRS components return to normal and protein carbonyl levels are decreased in left (16%) and right (20%) cortex. The significant decrease in GSH, GSSG, CSH, NPSSC, PSSR and PSSC, as well as the increase in protein carbonyl and the high increase in PSSP levels after PTZ-induced seizure indicate increased oxidative stress in cerebral cortex of mice, and of similar magnitude and TRS-component profiles between left and right cerebral cortex.
Collapse
|
15
|
Pang ZP, Ling GY, Gajendiran M, Xu ZC. Asymmetrical changes of excitatory synaptic transmission in dopamine-denervated striatum after transient forebrain ischemia. Neuroscience 2002; 114:317-26. [PMID: 12204201 DOI: 10.1016/s0306-4522(02)00309-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Spiny neurons in the neostriatum are highly vulnerable to cerebral ischemia. Recent studies have shown that the postischemic cell death in the right striatum was reduced after ipsilateral dopamine denervation whereas no protection was observed in the left striatum after dopamine denervation in the left side. In order to reveal the mechanisms of such asymmetrical protection, electrophysiological changes of dopamine-denervated striatal neurons were compared after ischemia between the left and right striatum using intracellular recording and staining techniques in vivo. No difference in cortically evoked initial excitatory postsynaptic potentials was found between the left and right striatum in intact animals after ipsilateral dopamine denervation. The initial excitatory postsynaptic potentials in the dopamine-denervated right striatum were suppressed after transient forebrain ischemia while no significant changes were found in the dopamine-denervated left striatum. Paired-pulse tests suggested that these changes involved presynaptic mechanisms. Although the incidence of a late depolarizing postsynaptic potential elicited by cortical stimulation increased after ischemia in both sides, the increase was greater in the left side. The analysis of current-voltage relationship of spiny neurons indicated that inward rectification in the left striatum transiently disappeared shortly after ischemia whereas that in the right side remained unchanged. The intrinsic excitability of spiny neurons in both sides were suppressed after ischemia, however, the suppression in the right side was stronger than in the left side. The above results demonstrate that after ipsilateral dopamine denervation, the depression of excitatory synaptic transmission and neuronal excitability in the right striatum is more severe than that in the left striatum following ischemia. The depression of excitatory synaptic transmission and neuronal excitability, therefore, might play an important role in neural protection after ischemic insult.
Collapse
Affiliation(s)
- Z P Pang
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | | | | | | |
Collapse
|
16
|
Gajendiran M, Ling GY, Pang Z, Xu ZC. Differential changes of synaptic transmission in spiny neurons of rat neostriatum following transient forebrain ischemia. Neuroscience 2001; 105:139-52. [PMID: 11483308 DOI: 10.1016/s0306-4522(01)00163-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Spiny neurons in neostriatum are vulnerable to cerebral ischemia. To reveal the mechanisms underlying the postischemic neuronal damage, the spontaneous activities, evoked postsynaptic potentials and membrane properties of spiny neurons in rat neostriatum were compared before and after transient forebrain ischemia using intracellular recording and staining techniques in vivo. In control animals the membrane properties of spiny neurons were about the same between the left and right neostriatum but the inhibitory synaptic transmission was stronger in the left striatum. After severe ischemia, the spontaneous firing and membrane potential fluctuation of spiny neurons dramatically reduced. The cortically evoked initial excitatory postsynaptic potentials were suppressed after ischemia indicated by the increase of stimulus threshold and the rise time of these components. The paired-pulse facilitation test indicated that such suppression might involve presynaptic mechanisms. The inhibitory postsynaptic potentials in spiny neurons were completely abolished after ischemia and never returned to the control levels. A late depolarizing postsynaptic potential that was elicited from approximately 5% of the control neurons by cortical stimulation could be evoked from approximately 30% of the neurons in the left striatum and approximately 50% in the right striatum after ischemia. The late depolarizing postsynaptic potential could not be induced after acute thalamic transection. The intrinsic excitability of spiny neurons was suppressed after ischemia evidenced by the significant increase of spike threshold and rheobase as well as the decrease of repetitive firing rate following ischemia. The membrane input resistance and time constant increased within 6 h following ischemia and the amplitude of fast afterhyperpolarization significantly increased after ischemia. These results indicate the depression of excitatory monosynaptic transmission, inhibitory synaptic transmission and excitability of spiny neurons after transient forebrain ischemia whereas the excitatory polysynaptic transmission in neostriatum was potentiated. The facilitation of excitatory polysynaptic transmission is stronger in the right neostriatum than in the left neostriatum after ischemia. The suppression of inhibitory component and the facilitation of excitatory polysynaptic transmission may contribute to the pathogenesis of neuronal injury in neostriatum after transient cerebral ischemia.
Collapse
Affiliation(s)
- M Gajendiran
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, 635 Barnhill Drive, MS 507, Indianapolis, IN 46202, USA
| | | | | | | |
Collapse
|
17
|
Cumming P, Laliberté C, Gjedde A. Distribution of histamine H3 binding in forebrain of mouse and guinea pig. Brain Res 1994; 664:276-9. [PMID: 7895042 DOI: 10.1016/0006-8993(94)91985-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
To map the unknown distribution of histamine H3 binding sites, we compared autoradiographs of the binding of the H3 agonist N alpha-[3H]methylhistamine ([3H]NAMH) in the forebrain of mouse and guinea pig. Saturation binding revealed the presence of a single site with apparent affinity of 0.75 nM in the mouse and 1.2 nM in the guinea pig. Binding constants were nearly identical in male and female mice. The rank order of [3H]NAMH binding in mouse brain was striatum > insular cortex > neocortex, as previously observed in the rat. In the guinea pig, the rank order was insular cortex > striatum approximately neocortex. The Bmax of [3H]NAMH in insular cortex of both species was close to 60 fmol/mg. Thus, the guinea pig differs from the rodent in that the highest density of H3 binding was present in cortical rather than subcortical structures.
Collapse
Affiliation(s)
- P Cumming
- Montreal Neurological Institute, Que., Canada
| | | | | |
Collapse
|
18
|
Schwarting RK, Steiner H, Huston JP. Asymmetries in thigmotactic scanning: evidence for a role of dopaminergic mechanisms. Psychopharmacology (Berl) 1991; 103:19-27. [PMID: 2006241 DOI: 10.1007/bf02244068] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In two experiments, the influence of spontaneous asymmetries in thigmotactic scanning was analyzed on spontaneous and drug-induced behavior in the rat. The side of the face with which an animal performed more scanning in a baseline test was defined as the dominant vibrissae side. In experiment 1, repeated testing of either spontaneous thigmotactic scanning, or scanning after apomorphine or amphetamine, yielded no evidence that rats would preferably use one side of the face for scanning, when re-exposed to the same environment. However, an asymmetry in turning was observed both under apomorphine and amphetamine, that is, turning away from the dominant vibrissae side. In experiment 2, an influence of spontaneous asymmetries in scanning was found on behavioral asymmetries induced by unilateral vibrissae removal. Only animals, in which the vibrissae of the non-dominant side had been removed, showed more scanning with the intact vibrissae side, both undrugged and after apomorphine. Turning under apomorphine was more pronounced in animals in which the vibrissae on the dominant side had been removed. These animals showed an asymmetry in turning towards the intact vibrissae side. Furthermore, in both experiments we found evidence for left/right differences in turning or scanning. The results are discussed with respect to possible endogenous substrates of asymmetry, such as within the mesostriatal dopamine system.
Collapse
Affiliation(s)
- R K Schwarting
- Institute of Physiological Psychology I, University of Düsseldorf, Federal Republic of Germany
| | | | | |
Collapse
|