1
|
Glennon RA, Dukat M. 1-(2,5-Dimethoxy-4-iodophenyl)-2-aminopropane (DOI): From an Obscure to Pivotal Member of the DOX Family of Serotonergic Psychedelic Agents - A Review. ACS Pharmacol Transl Sci 2024; 7:1722-1745. [PMID: 38898956 PMCID: PMC11184610 DOI: 10.1021/acsptsci.4c00157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/25/2024] [Accepted: 04/30/2024] [Indexed: 06/21/2024]
Abstract
1-(2,5-Dimethoxy-4-iodophenyl)-2-aminopropane (DOI, or DOX where X = -I) was first synthesized in 1973 in a structure-activity study to explore the effect of various aryl substituents on the then newly identified, and subsequently controlled, hallucinogenic agent 1-(2,5-dimethoxy-4-methylphenyl)-2-aminopropane (DOM, or DOX where X = -CH3). Over time, DOI was found to be a serotonin (5-HT) receptor agonist using various peripheral 5-HT receptor tissue assays and later, following the identification of multiple families of central 5-HT receptors, an agonist at 5-HT2 serotonin receptors in rat and, then, human brain. Today, classical hallucinogens, currently referred to as serotonergic psychedelic agents, are receiving considerable attention for their potential therapeutic application in various neuropsychiatric disorders including treatment-resistant depression. Here, we review, for the first time, the historical and current developments that led to DOI becoming a unique, perhaps a landmark, agent in 5-HT2 receptor research.
Collapse
Affiliation(s)
- Richard A. Glennon
- Department of Medicinal Chemistry
School of Pharmacy, Virginia Commonwealth
University, Richmond, Virginia 23298, United States
| | - Małgorzata Dukat
- Department of Medicinal Chemistry
School of Pharmacy, Virginia Commonwealth
University, Richmond, Virginia 23298, United States
| |
Collapse
|
2
|
Ye J, Fan H, Shi R, Song G, Wu X, Wang D, Xia B, Zhao Z, Zhao B, Liu X, Wang Y, Dai X. Dietary lipoic acid alleviates autism-like behavior induced by acrylamide in adolescent mice: the potential involvement of the gut-brain axis. Food Funct 2024; 15:3395-3410. [PMID: 38465655 DOI: 10.1039/d3fo05078e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Consuming fried foods has been associated with an increased susceptibility to mental health disorders. Nevertheless, the impact of alpha-lipoic acid (α-LA, LA) on fried food-induced autism-like behavior remains unclear. This study aimed to explore how LA affects autism-related behavior and cognitive deficits caused by acrylamide in mice, a representative food hazard found in fried foods. This improvement was accomplished by enhanced synaptic plasticity, increased neurotrophin expression, elevated calcium-binding protein D28k, and restored serotonin. Additionally, LA substantially influenced the abundance of bacteria linked to autism and depression, simultaneously boosted short-chain fatty acid (SCFA) levels in fecal samples, and induced changes in serum amino acid concentrations. In summary, these findings suggested that exposure to acrylamide in adolescent mice could induce the development of social disorders in adulthood. LA showed promise as a nutritional intervention strategy to tackle emotional disorders during adolescence.
Collapse
Affiliation(s)
- Jin Ye
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Hua Fan
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Renjie Shi
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Ge Song
- BGI Institute of Applied Agriculture, BGI-Shenzhen, Shenzhen, China.
| | - Xiaoning Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Danna Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Bing Xia
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Zhenting Zhao
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Beita Zhao
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Xuebo Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Yutang Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.
| | - Xiaoshuang Dai
- BGI Institute of Applied Agriculture, BGI-Shenzhen, Shenzhen, China.
| |
Collapse
|
3
|
The role of serotonin neurotransmission in rapid antidepressant actions. Psychopharmacology (Berl) 2022; 239:1823-1838. [PMID: 35333951 DOI: 10.1007/s00213-022-06098-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 02/16/2022] [Indexed: 10/18/2022]
Abstract
RATIONALE Ketamine has rapid antidepressant effects that represent a significant advance in treating depression, but its poor safety and tolerability limit its clinical utility. Accreting evidence suggests that serotonergic neurotransmission participates in the rapid antidepressant effects of ketamine and hallucinogens. Thus, understanding how serotonin contributes to these effects may allow identification of novel rapid antidepressant mechanisms with improved tolerability. OBJECTIVE The goal of this paper is to understand how serotonergic mechanisms participate in rapid antidepressant mechanisms. METHODS We review the relevance of serotonergic neurotransmission for rapid antidepressant effects and evaluate the role of 5-HT1A, 5-HT1B, 5-HT2A, and 5-HT4 receptors in synaptic plasticity, BDNF signaling, and GSK-3β activity. Subsequently, we develop hypotheses on the relationship of these receptor systems to rapid antidepressant effects. RESULTS We found that 5-HT1A and 5-HT1B receptors may participate in ketamine's rapid antidepressant mechanisms, while agonists at 5-HT2A and 5-HT4 receptors may independently behave as rapid antidepressants. 5-HT1A, 5-HT2A, and 5-HT4 receptors increase synaptic plasticity in the cortex or hippocampus but do not consistently increase BDNF signaling. We found that 5-HT1A and 5-HT1B receptors may participate in rapid antidepressant mechanisms as a consequence of increased BDNF signaling, rather than a cause. 5-HT2A and 5-HT4 receptor agonists may increase BDNF signaling, but these relationships are tenuous and need more study. Finally, we found that ketamine and several serotonergic receptor systems may mechanistically converge on reduced GSK-3β activity. CONCLUSIONS We find it plausible that serotonergic neurotransmission participates in rapid antidepressant mechanisms by increasing synaptic plasticity, perhaps through GSK-3β inhibition.
Collapse
|
4
|
Glatfelter GC, Chojnacki MR, McGriff SA, Wang T, Baumann MH. Automated Computer Software Assessment of 5-Hydroxytryptamine 2A Receptor-Mediated Head Twitch Responses from Video Recordings of Mice. ACS Pharmacol Transl Sci 2022; 5:321-330. [PMID: 35592434 PMCID: PMC9112414 DOI: 10.1021/acsptsci.1c00237] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Indexed: 02/08/2023]
Abstract
Psychedelics are a class of drugs that produce unique subjective effects via agonist actions at the 5-hydroxytryptamine 2A receptor (5-HT2A). The 5-HT2A-mediated head twitch response (HTR) in rodents is used as a reliable proxy for psychedelic drug activity in humans, but existing methods for measuring HTRs require surgery or time-consuming visual scoring. In the present work, we validated a simple noninvasive method for quantitating HTRs using computer-based analysis of experimental video recordings. Male C57BL/6J mice received injections of the 5-HT2 receptor agonist (±)2,5-dimethoxy-4-iodoamphetamine (DOI; 0.03-3 mg/kg, s.c.) and were placed into cylindrical arenas. High frame rate videos were recorded via cameras mounted above the arenas. Antagonist experiments, which entailed pretreatment with the 5-HT2A antagonist M100907 (0.01 or 0.1 mg/kg s.c.) prior to DOI (1 mg/kg s.c.), were also recorded. The experimental videos were analyzed for HTRs using a newly developed feature of a commercial software package and compared to visual scoring carried out by trained observers. As expected, DOI produced dose-related increases in HTRs, which were blocked by M100907. Computer scoring was positively correlated with visual scoring, and no statistical difference between the two methods was found. The software captured nearly all visually observed HTRs, false positives induced by other behaviors (e.g., grooming) were rare and easily identified, and results were improved by optimizing lighting conditions. Our findings demonstrate the utility of combining high frame rate video recordings with commercial software analyses to measure HTRs, validating an additional reliable method to study psychedelic-like drug activity in mice.
Collapse
Affiliation(s)
- Grant C. Glatfelter
- Designer
Drug Research Unit, Intramural Research Program, National Institute on Drug Abuse, Baltimore, Maryland 21224, United States
| | - Michael R. Chojnacki
- Designer
Drug Research Unit, Intramural Research Program, National Institute on Drug Abuse, Baltimore, Maryland 21224, United States
| | - Shelby A. McGriff
- Designer
Drug Research Unit, Intramural Research Program, National Institute on Drug Abuse, Baltimore, Maryland 21224, United States
| | - Tianpeng Wang
- Clever
Sys Inc., Reston, Virginia 20190, United
States
| | - Michael H. Baumann
- Designer
Drug Research Unit, Intramural Research Program, National Institute on Drug Abuse, Baltimore, Maryland 21224, United States
| |
Collapse
|
5
|
Effect of Central Administration of Brain-Derived Neurotrophic Factor (BDNF) on Behavior and Brain Monoamine Metabolism in New Recombinant Mouse Lines Differing by 5-HT 1A Receptor Functionality. Int J Mol Sci 2021; 22:ijms222111987. [PMID: 34769417 PMCID: PMC8584822 DOI: 10.3390/ijms222111987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 10/30/2021] [Accepted: 11/03/2021] [Indexed: 11/29/2022] Open
Abstract
Experiments were carried out on recombinant B6.CBA-D13Mit76C (B6-M76C) and B6.CBA-D13Mit76B (B6-M76B) mouse lines created by transferring a 102.73–118.83 Mbp fragment of chromosome 13, containing the 5-HT1A receptor gene, from CBA or C57BL/6 strains to a C57BL/6 genetic background, correspondingly. We have recently shown different levels of 5-HT1A receptor functionality in these mouse lines. The administration of BDNF (300 ng/mouse, i.c.v.) increased the levels of exploratory activity and intermale aggression only in B6-M76B mice, without affecting depressive-like behavior in both lines. In B6-M76B mice the behavioral alterations were accompanied by a decrease in the 5-HT2A receptor functional activity and the augmentation of levels of serotonin and its main metabolite, 5-HIAA (5-hydroxyindoleacetic acid), in the midbrain. Moreover, the levels of dopamine and its main metabolites, HVA (homovanillic acid) and DOPAC (3,4-dihydroxyphenylacetic acid), were also elevated in the striatum of B6-M76B mice after BDNF treatment. In B6-M76C mice, central BDNF administration led only to a reduction in the functional activity of the 5-HT1A receptor and a rise in DOPAC levels in the midbrain. The obtained data suggest the importance of the 102.73–118.83 Mbp fragment of mouse chromosome 13, which contains the 5-HT1A receptor gene, for BDNF-induced alterations in behavior and the brain monoamine system.
Collapse
|
6
|
Galan-Vasquez E, Perez-Rueda E. A landscape for drug-target interactions based on network analysis. PLoS One 2021; 16:e0247018. [PMID: 33730052 PMCID: PMC7968663 DOI: 10.1371/journal.pone.0247018] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/30/2021] [Indexed: 12/30/2022] Open
Abstract
In this work, we performed an analysis of the networks of interactions between drugs and their targets to assess how connected the compounds are. For our purpose, the interactions were downloaded from the DrugBank database, and we considered all drugs approved by the FDA. Based on topological analysis of this interaction network, we obtained information on degree, clustering coefficient, connected components, and centrality of these interactions. We identified that this drug-target interaction network cannot be divided into two disjoint and independent sets, i.e., it is not bipartite. In addition, the connectivity or associations between every pair of nodes identified that the drug-target network is constituted of 165 connected components, where one giant component contains 4376 interactions that represent 89.99% of all the elements. In this regard, the histamine H1 receptor, which belongs to the family of rhodopsin-like G-protein-coupled receptors and is activated by the biogenic amine histamine, was found to be the most important node in the centrality of input-degrees. In the case of centrality of output-degrees, fostamatinib was found to be the most important node, as this drug interacts with 300 different targets, including arachidonate 5-lipoxygenase or ALOX5, expressed on cells primarily involved in regulation of immune responses. The top 10 hubs interacted with 33% of the target genes. Fostamatinib stands out because it is used for the treatment of chronic immune thrombocytopenia in adults. Finally, 187 highly connected sets of nodes, structured in communities, were also identified. Indeed, the largest communities have more than 400 elements and are related to metabolic diseases, psychiatric disorders and cancer. Our results demonstrate the possibilities to explore these compounds and their targets to improve drug repositioning and contend against emergent diseases.
Collapse
Affiliation(s)
- Edgardo Galan-Vasquez
- Departamento de Ingeniería de Sistemas Computacionales y Automatización, Instituto de Investigación en Matemáticas Aplicadas y en Sistemas, Universidad Nacional Autónoma de México, Ciudad Universitaria, México City, México
| | - Ernesto Perez-Rueda
- Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas, Universidad Nacional Autónoma de México, Unidad Académica Yucatán, Mérida, Yucatán, México
| |
Collapse
|
7
|
Corne R, Mongeau R. [Neurotrophic mechanisms of psychedelic therapy]. Biol Aujourdhui 2019; 213:121-129. [PMID: 31829932 DOI: 10.1051/jbio/2019015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Indexed: 01/21/2023]
Abstract
Psychedelic drugs, often referred to as hallucinogens, are quite distinct from other classes of psychotropic drugs. Although the subjective and behavioral effects they induce are quite dramatic, they possess little addictive potential when compared to nicotine, alcohol or opiates. Since the discovery of ketamine antidepressant effects, there has been growing interest for these molecules. Serotonergic psychedelics such as psilocybin and lysergic acid diethylamide (LSD) are gaining attention as potential treatments for depression and addiction, similarly to 3,4-methylenedioxymethamphetamine (MDMA) for post-traumatic stress disorder (PTSD), and ibogaine for addiction. Although they possess distinct pharmacological profiles, their kinetics of action are quite similar: the therapeutic effects are felt within the hours following administration, and last well beyond drug elimination by the organism. This strongly suggests the induction of neurogenic and plastic mechanisms, including the involvement of trophic factors. This review will explore the literature dealing with the effects of psychedelics on neurotrophins, as well as the plastic adaptations that they induce, in an attempt to understand their surprising therapeutic potential. We will show that although ketamine and serotonergic psychedelics have affinity for very different receptors (NMDA, 5-HT2A), they ultimately initiate similar plastic adaptations in the prefrontal cortex through the involvement of the brain-derived neurotrophic factor (BDNF). We will see that although MDMA uses the same receptors as serotonergic psychedelics to alleviate PTSD symptoms, its effect on BDNF levels seem paradoxical and quite different. Finally, we show how ibogaine could exert its anti-addictive properties through a completely different neurotrophic factor than other psychedelic drugs, the glial cell line-derived neurotrophic factor (GDNF). While the current literature concerning the psychiatric applications of psychedelic therapy is encouraging, it remains to be determined whether their benefits could be obtained without their psychotomimetic effects, or concerns over potential toxicity.
Collapse
Affiliation(s)
- Rémi Corne
- CNRS ERL 3649 « Neuroplasticité et thérapies des addictions », UMR-S 1124, Université Paris Descartes, 4, avenue de l'Observatoire, 75006 Paris, France
| | - Raymond Mongeau
- CNRS ERL 3649 « Neuroplasticité et thérapies des addictions », UMR-S 1124, Université Paris Descartes, 4, avenue de l'Observatoire, 75006 Paris, France
| |
Collapse
|
8
|
Loewenstern J, You X, Merchant J, Gordon EM, Stollstorff M, Devaney J, Vaidya CJ. Interactive effect of 5-HTTLPR and BDNF polymorphisms on amygdala intrinsic functional connectivity and anxiety. Psychiatry Res Neuroimaging 2019; 285:1-8. [PMID: 30711709 PMCID: PMC6699775 DOI: 10.1016/j.pscychresns.2019.01.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 01/28/2019] [Accepted: 01/28/2019] [Indexed: 12/16/2022]
Abstract
The serotonin transporter (5-HTTLPR) and brain-derived neurotrophic factor (BDNF) gene polymorphisms have been associated with risk for affective disorders and functional variability of the amygdala. We examined whether the two genotypes interactively influence intrinsic functional connectivity (FC) of the amygdala and whether FC mediates the genetic association with anxiety. Eighty genotyped healthy adults underwent resting state fMRI and completed the self-reported State-Trait Anxiety Inventory. Interactive genetic association with anxiety was observed such that effects of 5-HTTLPR depended on the BDNF Val66Met polymorphism (rs6265 variant), with higher anxiety scores in short and Met carriers compared to the other allelic groups. Voxel-wise FC with left and right amygdala seeds identified regions that were sensitive to variability in anxiety scores. A significant moderated mediation model demonstrated that the effect of 5-HTTLPR genotype on anxiety, moderated by BDNF Val66Met genotype, was fully mediated by FC between the left amygdala and the right dorsolateral prefrontal cortex, a cognitive control-related region, during a task-free state. FC was highest in carriers of the 5-HTTLPR short allele and BDNF Met allele. These findings establish intrinsic amygdala-prefrontal functional connectivity as a potential intermediate phenotype for anxiety, an important step toward identification of causal pathways for vulnerability to affective disorders.
Collapse
Affiliation(s)
- Joshua Loewenstern
- Department of Psychology, Georgetown University, 306 White-Gravenor, Washington, DC 20057, United States
| | - Xiaozhen You
- Department of Psychology, Georgetown University, 306 White-Gravenor, Washington, DC 20057, United States; Children's Research Institute, Children's National Medical Center, Washington, DC, United States
| | - Junaid Merchant
- Department of Psychology, Georgetown University, 306 White-Gravenor, Washington, DC 20057, United States
| | - Evan M Gordon
- VISN 17 Center of Excellence for Research on Returning War Veterans, Waco, TX, United States; Center for Vital Longevity, University of Texas at Dallas, Dallas, TX, United States
| | - Melanie Stollstorff
- Department of Psychology, Florida International University, Miami, FL, United States
| | - Joseph Devaney
- Children's Research Institute, Children's National Medical Center, Washington, DC, United States
| | - Chandan J Vaidya
- Department of Psychology, Georgetown University, 306 White-Gravenor, Washington, DC 20057, United States; Children's Research Institute, Children's National Medical Center, Washington, DC, United States.
| |
Collapse
|
9
|
Shen Z, Zhu J, Yuan Y, Ren L, Qian M, Lin M, Cai M, Zhang Z, Shen X. The roles of brain-derived neurotrophic factor (BDNF) and glial cell line-derived neurotrophic factor (GDNF) in predicting treatment remission in a Chinese Han population with generalized anxiety disorder. Psychiatry Res 2019; 271:319-324. [PMID: 30529313 DOI: 10.1016/j.psychres.2018.08.111] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 08/26/2018] [Accepted: 08/28/2018] [Indexed: 02/06/2023]
Abstract
Neurotrophic factors, particularly brain-derived neurotrophic factor (BDNF) and glial cell line-derived neurotrophic factor (GDNF), are involved in neuroplasticity in the nervous system. To explore the characteristics of BDNF and GDNF and their roles in predicting treatment remission in a Chinese Han population with generalized anxiety disorder (GAD), 85 GAD patients were treated with escitalopram or venlafaxine randomly for 8 weeks. The serum BDNF/GDNF levels were detected, while Hamilton Anxiety Rating Scale (HAMA) scores were measured at baseline and after 8 weeks of treatment. The differences in serum BDNF/GDNF levels between GAD patients (n = 85) and healthy controls (n = 73) and between remission and nonremission were then compared. The serum BDNF levels were lower in GAD patients (1197.24 ± 367.41 µg/L) than in healthy controls (1378.09 ± 382.46 µg/L) (P < 0.05). The serum GDNF levels were also lower in GAD patients (10.19 ± 9.86 µg/L) than in healthy controls (13.73 ± 9.44 µg/L) (P < 0.05). The BDNF level was negatively correlated with baseline HAMA score (P < 0.05). The GDNF level was negatively correlated with baseline HAMA score (P < 0.05). The BDNF level was positively correlated with GDNF level (P < 0.05). Both baseline BDNF/GDNF levels in remission and nonremission showed no statistically significant differences. No significant correlation was found between baseline BDNF level and the HAMA reduction rate or between baseline GDNF levels and the HAMA reduction rate. Both serum BDNF and GDNF were demonstrated to be potential biomarkers of GAD, it seems that serum BDNF and GDNF levels can be used to assess the baseline anxiety severity of GAD but cannot serve as a factor to predict treatment remission.
Collapse
Affiliation(s)
- Zhongxia Shen
- Department of Neurosis and Psychosomatic Diseases, Huzhou 3rd Hospital, Huzhou, Zhejiang 313000, PR China
| | - Jianying Zhu
- Department of Neurosis and Psychosomatic Diseases, Huzhou 3rd Hospital, Huzhou, Zhejiang 313000, PR China
| | - Yonggui Yuan
- Department of Neuropsychiatry, Affiliated ZhongDa Hospital of Southeast University, Nanjing 210009, PR China
| | - Lie Ren
- Department of Neurosis and Psychosomatic Diseases, Huzhou 3rd Hospital, Huzhou, Zhejiang 313000, PR China
| | - Mincai Qian
- Department of Neurosis and Psychosomatic Diseases, Huzhou 3rd Hospital, Huzhou, Zhejiang 313000, PR China
| | - Min Lin
- Department of Neurosis and Psychosomatic Diseases, Huzhou 3rd Hospital, Huzhou, Zhejiang 313000, PR China
| | - Min Cai
- Department of Neurosis and Psychosomatic Diseases, Huzhou 3rd Hospital, Huzhou, Zhejiang 313000, PR China
| | - Zhen Zhang
- Department of Neurosis and Psychosomatic Diseases, Huzhou 3rd Hospital, Huzhou, Zhejiang 313000, PR China
| | - Xinhua Shen
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, PR China.
| |
Collapse
|
10
|
Imaging correlates of behavioral impairments: An experimental PET study in the rat pilocarpine epilepsy model. Neurobiol Dis 2018; 118:9-21. [DOI: 10.1016/j.nbd.2018.06.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 06/05/2018] [Accepted: 06/12/2018] [Indexed: 01/04/2023] Open
|
11
|
The renaissance in psychedelic research: What do preclinical models have to offer. PROGRESS IN BRAIN RESEARCH 2018; 242:25-67. [DOI: 10.1016/bs.pbr.2018.08.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
12
|
Popova NK, Ilchibaeva TV, Naumenko VS. Neurotrophic factors (BDNF and GDNF) and the serotonergic system of the brain. BIOCHEMISTRY (MOSCOW) 2017; 82:308-317. [DOI: 10.1134/s0006297917030099] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
13
|
Zulfiker AHM, Hashimi SM, Good DA, Grice ID, Wei MQ. Cane Toad Skin Extract-Induced Upregulation and Increased Interaction of Serotonin 2A and D 2 Receptors via G q/11 Signaling Pathway in CLU213 Cells. J Cell Biochem 2017; 118:979-993. [PMID: 27291138 DOI: 10.1002/jcb.25627] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Accepted: 06/10/2016] [Indexed: 01/03/2023]
Abstract
Recent evidences show that activation of serotonin 2A receptors (5-HT2A R) by agonists is significant in improving therapeutic activity of disease conditions, such as obsessive-compulsive disorder (OCD). Though the exact molecular mechanism is still not well understood, it is thought to involve agonist-driven, enhanced expression of 5-HT2A R in certain areas of brain, such as the pre-frontal cortex (PFC). Several other reports have also demonstrated association of OCD with lower dopamine receptor (D2 R) availability, primarily in the striatum of the brain along with dysfunction of 5-HT2A R-D2 R heteromer regulation. We thus hypothesized that compound(s) interacting with this molecular mechanism could be developed as drugs for long-term beneficial effects against OCD. In the present study, we have obtained experimental evidence in cultured neuronal cells (CLU213) that aqueous extract (AE, 50 μg/mL, P < 0.05) of the Australian cane toad skin significantly increased the levels of 5-HT2A R and D2 R protein and mRNA expression. AE was also found to enhance the interaction between 5-HT2A R and D2 R and formation of expression of 5-HT2A R-D2 R heteromer using co-immunoprecipitation and Western blot. Further investigation showed the involvement of classical signaling pathway (Gq/11 -PLCβ) along with c-FOS transcription factor preferentially in 5-HT2A -mediated agonist activation. These results obtained demonstrated that AE upregulates 5-HT2A R by a mechanism that appears to involve Gq/11 -PLCβ signaling pathway and c-FOS transcription factor activation. We indicate this enhanced 5-HT2A R and D2 R expression and their interaction to induce increased 5-HT2A R-D2 R heteromer formation by exposure to AE might provide a molecular mechanism to develop potential novel drug candidates to ameliorate OCD symptoms. J. Cell. Biochem. 118: 979-993, 2017. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Abu Hasanat Md Zulfiker
- School of Medical Science and Menzies Health Institute Queensland, Gold Coast Campus, Griffith University, Queensland, 4222, Australia
| | - Saeed M Hashimi
- School of Medical Science and Menzies Health Institute Queensland, Gold Coast Campus, Griffith University, Queensland, 4222, Australia.,Department of Biology, Deanship of Preparatory Year, University of Dammam, Dammam, Kingdom of Saudi Arabia
| | - David A Good
- School of Medical Science and Menzies Health Institute Queensland, Gold Coast Campus, Griffith University, Queensland, 4222, Australia.,School of Physiotherapy, Banyo Campus, Australian Catholic University, Queensland, 4014, Australia
| | - I Darren Grice
- Institute for Glycomics and School of Medical Science, Gold Coast Campus, Griffith University, Queensland, 4222, Australia
| | - Ming Q Wei
- School of Medical Science and Menzies Health Institute Queensland, Gold Coast Campus, Griffith University, Queensland, 4222, Australia
| |
Collapse
|
14
|
Raab K, Kirsch P, Mier D. Understanding the impact of 5-HTTLPR, antidepressants, and acute tryptophan depletion on brain activation during facial emotion processing: A review of the imaging literature. Neurosci Biobehav Rev 2016; 71:176-197. [DOI: 10.1016/j.neubiorev.2016.08.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 07/28/2016] [Accepted: 08/26/2016] [Indexed: 12/22/2022]
|
15
|
Barra de la Tremblaye P, Plamondon H. Alterations in the corticotropin-releasing hormone (CRH) neurocircuitry: Insights into post stroke functional impairments. Front Neuroendocrinol 2016; 42:53-75. [PMID: 27455847 DOI: 10.1016/j.yfrne.2016.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 07/04/2016] [Accepted: 07/06/2016] [Indexed: 10/21/2022]
Abstract
Although it is well accepted that changes in the regulation of the hypothalamic-pituitary adrenal (HPA) axis may increase susceptibility to affective disorders in the general population, this link has been less examined in stroke patients. Yet, the bidirectional association between depression and cardiovascular disease is strong, and stress increases vulnerability to stroke. Corticotropin-releasing hormone (CRH) is the central stress hormone of the HPA axis pathway and acts by binding to CRH receptors (CRHR) 1 and 2, which are located in several stress-related brain regions. Evidence from clinical and animal studies suggests a role for CRH in the neurobiological basis of depression and ischemic brain injury. Given its importance in the regulation of the neuroendocrine, autonomic, and behavioral correlates of adaptation and maladaptation to stress, CRH is likely associated in the pathophysiology of post stroke emotional impairments. The goals of this review article are to examine the clinical and experimental data describing (1) that CRH regulates the molecular signaling brain circuit underlying anxiety- and depression-like behaviors, (2) the influence of CRH and other stress markers in the pathophysiology of post stroke emotional and cognitive impairments, and (3) context and site specific interactions of CRH and BDNF as a basis for the development of novel therapeutic targets. This review addresses how the production and release of the neuropeptide CRH within the various regions of the mesocorticolimbic system influences emotional and cognitive behaviors with a look into its role in psychiatric disorders post stroke.
Collapse
Affiliation(s)
- P Barra de la Tremblaye
- School of Psychology, Behavioral Neuroscience Program, University of Ottawa, 136 Jean-Jacques Lussier, Vanier Building, Ottawa, Ontario K1N 6N5, Canada
| | - H Plamondon
- School of Psychology, Behavioral Neuroscience Program, University of Ottawa, 136 Jean-Jacques Lussier, Vanier Building, Ottawa, Ontario K1N 6N5, Canada.
| |
Collapse
|
16
|
Jin Y, Park Y. N-3 polyunsaturated fatty acids and 17β-estradiol injection induce antidepressant-like effects through regulation of serotonergic neurotransmission in ovariectomized rats. J Nutr Biochem 2015; 26:970-7. [DOI: 10.1016/j.jnutbio.2015.04.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 03/31/2015] [Accepted: 04/03/2015] [Indexed: 10/23/2022]
|
17
|
Tsybko AS, Il’chibaeva TV, Kondaurova EM, Bazovkina DV, Naumenko VS. Effect of central administration of the neurotrophic factors BDNF and GDNF on the functional activity and expression of 5-HT2A serotonin receptors in mice genetically predisposed to depressive-like behavior. Mol Biol 2014. [DOI: 10.1134/s0026893314060181] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
18
|
Borrow AP, Cameron NM. Estrogenic mediation of serotonergic and neurotrophic systems: implications for female mood disorders. Prog Neuropsychopharmacol Biol Psychiatry 2014; 54:13-25. [PMID: 24865152 DOI: 10.1016/j.pnpbp.2014.05.009] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 05/13/2014] [Accepted: 05/14/2014] [Indexed: 01/17/2023]
Abstract
Clinical research has demonstrated a significant sex difference in the occurrence of depressive disorders. Beginning at pubertal onset, women report a higher incidence of depression than men. Women are also vulnerable to the development of depressive disorders such as premenstrual dysphoric disorder, postpartum depression, and perimenopausal depression. These disorders are associated with reproductive stages involving changes in gonadal hormone levels. Specifically, female depression and female affective behaviors are influenced by estradiol levels. This review argues two major mechanisms by which estrogens influence depression and depressive-like behavior: through interactions with neurotrophic factors and through an influence on the serotonergic system. In particular, estradiol increases brain derived neurotrophic factor (BDNF) levels within the brain, and alters serotonergic expression in a receptor subtype-specific manner. We will take a regional approach, examining these effects of estrogens in the major brain areas implicated in depression. Finally, we will discuss the gaps in our current knowledge of the effects of estrogens on female depression, and the potential utility for estrogen receptor modulators in treatment for this disorder.
Collapse
|
19
|
Fisher PM, Holst KK, Adamsen D, Klein AB, Frokjaer VG, Jensen PS, Svarer C, Gillings N, Baare WFC, Mikkelsen JD, Knudsen GM. BDNF Val66met and 5-HTTLPR polymorphisms predict a human in vivo marker for brain serotonin levels. Hum Brain Mapp 2014; 36:313-23. [PMID: 25220079 DOI: 10.1002/hbm.22630] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 07/29/2014] [Accepted: 08/29/2014] [Indexed: 11/12/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) has been implicated in multiple aspects of brain function including regulation of serotonin signaling. The BDNF val66met polymorphism (rs6265) has been linked to aspects of serotonin signaling in humans but its effects are not well understood. To address this, we evaluated whether BDNF val66met was predictive of a putative marker of brain serotonin levels, serotonin 4 receptor (5-HT4 ) binding assessed with [11C]SB207145 positron emission tomography, which has also been associated with the serotonin-transporter-linked polymorphic region (5-HTTLPR) polymorphism. We applied a linear latent variable model (LVM) using regional 5-HT4 binding values (neocortex, amygdala, caudate, hippocampus, and putamen) from 68 healthy humans, allowing us to explicitly model brain-wide and region-specific genotype effects on 5-HT4 binding. Our data supported an LVM wherein BDNF val66met significantly predicted a LV reflecting [11C]SB207145 binding across regions (P = 0.005). BDNF val66met met-carriers showed 2-9% higher binding relative to val/val homozygotes. In contrast, 5-HTTLPR did not predict the LV but S-carriers showed 7% lower neocortical binding relative to LL homozygotes (P = 7.3 × 10(-6)). We observed no evidence for genetic interaction. Our findings indicate that BDNF val66met significantly predicts a common regulator of brain [11C]SB207145 binding, which we hypothesize reflects brain serotonin levels. In contrast, our data indicate that 5-HTTLPR specifically affects 5-HT4 binding in the neocortex. These findings implicate serotonin signaling as an important molecular mediator underlying the effects of BDNF val66met and 5-HTTLPR on behavior and related risk for neuropsychiatric illness in humans.
Collapse
Affiliation(s)
- Patrick M Fisher
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Shao F, Han X, Shao S, Wang W. Adolescent social isolation influences cognitive function in adult rats. Neural Regen Res 2014; 8:1025-30. [PMID: 25206396 PMCID: PMC4145882 DOI: 10.3969/j.issn.1673-5374.2013.11.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 01/17/2013] [Indexed: 12/11/2022] Open
Abstract
Adolescence is a critical period for neurodevelopment. Evidence from animal studies suggests that isolated rearing can exert negative effects on behavioral and brain development. The present study aimed to investigate the effects of adolescent social isolation on latent inhibition and brain-derived neurotrophic factor levels in the forebrain of adult rats. Male Wistar rats were randomly divided into adolescent isolation (isolated housing, 38–51 days of age) and social groups. Latent inhibition was tested at adulthood. Brain-derived neurotrophic factor levels were measured in the medial prefrontal cortex and nucleus accumbens by an enzyme-linked immunosorbent assay. Adolescent social isolation impaired latent inhibition and increased brain-derived neurotrophic factor levels in the medial prefrontal cortex of young adult rats. These data suggest that adolescent social isolation has a profound effect on cognitive function and neurotrophin levels in adult rats and may be used as an animal model of neurodevelopmental disorders.
Collapse
Affiliation(s)
- Feng Shao
- Department of Psychology, Peking University, Beijing 100871, China
| | - Xiao Han
- Department of Psychology, Peking University, Beijing 100871, China
| | - Shuang Shao
- Department of Psychology, Peking University, Beijing 100871, China
| | - Weiwen Wang
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China
| |
Collapse
|
21
|
The predictive power of brain mRNA mappings for in vivo protein density: a positron emission tomography correlation study. J Cereb Blood Flow Metab 2014; 34:827-35. [PMID: 24496175 PMCID: PMC4013760 DOI: 10.1038/jcbfm.2014.21] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 12/17/2013] [Accepted: 12/24/2013] [Indexed: 11/08/2022]
Abstract
Substantial efforts are being spent on postmortem mRNA transcription mapping on the assumption that in vivo protein distribution can be predicted from such data. We tested this assumption by comparing mRNA transcription maps from the Allen Human Brain Atlas with reference protein concentration maps acquired with positron emission tomography (PET) in two representative systems of neurotransmission (opioid and serotoninergic). We found a tight correlation between mRNA expression and specific binding with 5-HT1A receptors measured with PET, but for opioid receptors, the correlation was weak. The discrepancy can be explained by differences in expression regulation between the two systems: transcriptional mechanisms dominate the regulation in the serotoninergic system, whereas in the opioid system proteins are further modulated after transcription. We conclude that mRNA information can be exploited for systems where translational mechanisms predominantly regulate expression. Where posttranscriptional mechanisms are important, mRNA data have to be interpreted with caution. The methodology developed here can be used for probing assumptions about the relationship of mRNA and protein in multiple neurotransmission systems.
Collapse
|
22
|
Naumenko VS, Kondaurova EM, Bazovkina DV, Tsybko AS, Il'chibaeva TV, Popova NK. On the role of 5-HT1Areceptor gene in behavioral effect of brain-derived neurotrophic factor. J Neurosci Res 2014; 92:1035-43. [DOI: 10.1002/jnr.23381] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 01/31/2014] [Accepted: 02/19/2014] [Indexed: 01/08/2023]
Affiliation(s)
- Vladimir S. Naumenko
- Department of Behavioral Neurogenomics; Institute of Cytology and Genetics; Siberian Division of the Russian Academy of Science; Novosibirsk Russia
| | - Elena M. Kondaurova
- Department of Behavioral Neurogenomics; Institute of Cytology and Genetics; Siberian Division of the Russian Academy of Science; Novosibirsk Russia
| | - Daria V. Bazovkina
- Department of Behavioral Neurogenomics; Institute of Cytology and Genetics; Siberian Division of the Russian Academy of Science; Novosibirsk Russia
| | - Anton S. Tsybko
- Department of Behavioral Neurogenomics; Institute of Cytology and Genetics; Siberian Division of the Russian Academy of Science; Novosibirsk Russia
| | - Tatyana V. Il'chibaeva
- Department of Behavioral Neurogenomics; Institute of Cytology and Genetics; Siberian Division of the Russian Academy of Science; Novosibirsk Russia
| | - Nina K. Popova
- Department of Behavioral Neurogenomics; Institute of Cytology and Genetics; Siberian Division of the Russian Academy of Science; Novosibirsk Russia
| |
Collapse
|
23
|
Lan MJ, Ogden RT, Huang YY, Oquendo MA, Sullivan GM, Miller J, Milak M, Mann JJ, Parsey RV. Genetic variation in brain-derived neurotrophic factor val66met allele is associated with altered serotonin-1A receptor binding in human brain. Neuroimage 2014; 94:33-39. [PMID: 24607934 DOI: 10.1016/j.neuroimage.2014.02.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/31/2014] [Accepted: 02/24/2014] [Indexed: 10/25/2022] Open
Abstract
Brain Derived Neurotrophic Factor (BDNF) regulates brain synaptic plasticity. BDNF affects serotonin signaling, increases serotonin levels in brain tissue and prevents degeneration of serotonin neurons. These effects have hardly been studied in human brain. We examined the relationship of the functional val66met polymorphism of the BDNF gene to serotonin 1A (5-HT(1A)) receptor binding in vivo. 50 healthy volunteers (HV) and 50 acutely depressed, unmedicated patients with major depressive disorder (MDD) underwent PET scanning with the 5-HT(1A) receptor ligand, [(11)C]WAY-100635 and a metabolite corrected arterial input function. A linear mixed effects model compared 5-HT(1A) receptor binding potential (BP(F), proportional to the number of available receptors) in 13 brain regions of interest between met allele carriers (met/met and val/met) and noncarriers (val/val) using sex and C-1019G genotype of the 5-HT(1A) receptor promoter functional polymorphism as covariates. There was an interaction between diagnosis and allele (F=4.23, df=1, 94, p=0.042), such that met allele carriers had 17.4% lower BP(F) than non-met carriers in the HV group (t=2.6, df=96, p=0.010), but not in the MDD group (t=-0.4, df=96, p=0.58). These data are consistent with a model where the met allele of the val66met polymorphism causes less proliferation of serotonin synapses, and consequently fewer 5-HT(1A) receptors. In MDD, however, the effect of the val66met polymorphism is not detectable, possibly due to a ceiling effect of over-expression of 5-HT(1A) receptors in mood disorders.
Collapse
Affiliation(s)
- Martin J Lan
- Department of Psychiatry, Columbia University New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10032, USA; Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10021, USA.
| | - R Todd Ogden
- Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10021, USA; Department of Biostatistics, Columbia University School of Public Health, 722 West 168th Street, 6th Floor, New York, NY 10032, USA
| | - Yung-Yu Huang
- Department of Psychiatry, Columbia University New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10032, USA; Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10021, USA
| | - Maria A Oquendo
- Department of Psychiatry, Columbia University New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10032, USA; Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10021, USA
| | - Gregory M Sullivan
- Department of Psychiatry, Columbia University New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10032, USA; Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10021, USA
| | - Jeffrey Miller
- Department of Psychiatry, Columbia University New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10032, USA; Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10021, USA
| | - Matthew Milak
- Department of Psychiatry, Columbia University New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10032, USA; Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10021, USA
| | - J John Mann
- Department of Psychiatry, Columbia University New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10032, USA; Division of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 1051 Riverside Drive, Box 42, New York, NY 10021, USA; Department of Radiology, Columbia University College of Physicians and Surgeons, 180 Fort Washington Avenue, 3rd Floor, Harkness Pavilion, Room 313, New York, NY 10032, USA
| | - Ramin V Parsey
- Department of Psychiatry and Behavioral Science, Department of Radiology, Stony Brook Medicine, Health Sciences Center, T16, Rm-020, Stony Brook, NY 11794-8160, USA
| |
Collapse
|
24
|
Sakata K, Duke SM. Lack of BDNF expression through promoter IV disturbs expression of monoamine genes in the frontal cortex and hippocampus. Neuroscience 2013; 260:265-75. [PMID: 24345476 DOI: 10.1016/j.neuroscience.2013.12.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 11/29/2013] [Accepted: 12/06/2013] [Indexed: 02/07/2023]
Abstract
Brain-derived neurotrophic factor (BDNF) is implicated in the pathophysiology of psychiatric conditions including major depression and schizophrenia. Mice lacking activity-driven BDNF expression through promoter IV (knock-in promoter IV: KIV) exhibit depression-like behavior, inflexible learning, and impaired response inhibition. Monoamine systems (serotonin, dopamine, and noradrenaline) are suggested to be involved in depression and schizophrenia since many of the current antidepressants and antipsychotics increase the brain levels of monoamines and/or act on monoamine receptors. To elucidate the impact of activity-driven BDNF on the monoamine systems, we examined mRNA levels for 30 monoamine-related genes, including receptors, transporters, and synthesizing enzymes, in KIV and control wild-type mice by using quantitative reverse-transcription polymerase chain reaction (qRT-PCR). mRNA levels were measured in the frontal cortex and hippocampus, which are regions related to depression and schizophrenia and where promoter IV is active. The frontal cortex of KIV mice showed reduced levels of mRNA expression for serotonin receptors 1b, 2a, and 5b (5HTR1b, 5HTR2a, 5HTR5b), dopamine D2 receptors (DRD2), and adrenergic receptors alpha 1a and 1d (AdRα1a and AdRα1b), but increased levels for serotonin synthesizing enzyme, tryptophan hydroxylase (TPH), and dopamine D4 receptor (DRD4) when compared to control wild-type mice. The hippocampus of KIV mice showed decreased levels of 5HTR5b. Our results provide causal evidence that lack of promoter IV-driven BDNF disturbs expression of monoaminergic genes in the frontal cortex and hippocampus. These disturbed expression changes in the monoamine systems may mediate the depression- and schizophrenia-like behavior of KIV mice. Our results also suggest that antidepressant and antipsychotic treatments may actually interfere with and normalize the disturbed monoamine systems caused by reduced activity-dependent BDNF, while the treatment responses to these drugs may differ in the subject with reduced BDNF levels caused by stress and lack of neuronal activity.
Collapse
Affiliation(s)
- K Sakata
- Department of Pharmacology, University of Tennessee Health Science Center, Memphis, TN, USA.
| | - S M Duke
- Department of Pharmacology, University of Tennessee Health Science Center, Memphis, TN, USA
| |
Collapse
|
25
|
Kourmouli N, Samakouri M, Mamatsiou A, Trypsianis G, Livaditis M, Veletza S. Effect of BDNF Val66Met and serotonin transporter 5-HTTLPR polymorphisms on psychopathological characteristics in a sample of university students. Psychiatr Genet 2013; 23:188-97. [DOI: 10.1097/ypg.0b013e3283643629] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
26
|
Hori Y, Goto G, Arai-Iwasaki M, Ishikawa M, Sakamoto A. Differential expression of rat hippocampal microRNAs in two rat models of chronic pain. Int J Mol Med 2013; 32:1287-92. [PMID: 24065306 DOI: 10.3892/ijmm.2013.1504] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 09/16/2013] [Indexed: 11/06/2022] Open
Abstract
The two most common forms of chronic pain are inflammatory pain and neuropathic pain. Nevertheless, the underlying mechanisms of these pain conditions and their therapeutic responses are poorly understood. MicroRNAs (miRNAs) negatively regulate cell genes, and thus control cell proliferation, inflammation and metabolism. In the present study, we examined gene expression in the hippocampus of rats in two models of chronic pain. In addition, we used the left hindpaw procedure to identify differences in the bilateral hippocampus. We divided the rats into the 4 following groups: the group with chronic constriction injury (CCI), the sham-operated group, the group injected with complete Freund's adjuvant (CFA) and the group injected with normal saline. miRNA expression profiles were analyzed using TaqMan low-density array (TLDA). We observed 54 miRNAs (22.7%) in the rats with CCI rats that were differentially expressed, including 7 miRNAs that were downregulated compared with the sham-operated rats. In the CFA-injected rats, 40 miRNAs (16.8%) were differentially expressed, including 8 miRNAs that were downregulated compared with the normal saline-injected rats. Pearson's correlation co-efficient for all detected miRNAs in the rat hippocampus failed to identify differences between the hippocampi bilaterally. An unsupervised cluster analysis produced separate clusters between the control and experimental groups. In this study, we demonstrate the differential expression of hippocampal miRNAs in two rat models of chronic pain; however, no significant differences were observed bilaterally in hippocampal miRNA expression. Further research is required to determine the correlation among miRNAs, messenger RNAs (mRNAs) and proteins.
Collapse
Affiliation(s)
- Yoko Hori
- Department of Anesthesiology and Pain Medicine, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | | | | | | | | |
Collapse
|
27
|
Jørgensen CV, Klein AB, EL-Sayed M, Knudsen GM, Mikkelsen JD. Metabotropic glutamate receptor 2 and corticotrophin-releasing factor receptor-1 gene expression is differently regulated by BDNF in rat primary cortical neurons. Synapse 2013; 67:794-800. [DOI: 10.1002/syn.21689] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 06/03/2013] [Indexed: 01/19/2023]
Affiliation(s)
| | - Anders B. Klein
- Neurobiology Research Unit, University Hospital Rigshospitalet; Copenhagen Denmark
| | - Mona EL-Sayed
- Neurobiology Research Unit, University Hospital Rigshospitalet; Copenhagen Denmark
| | - Gitte M. Knudsen
- Neurobiology Research Unit, University Hospital Rigshospitalet; Copenhagen Denmark
| | - Jens D. Mikkelsen
- Neurobiology Research Unit, University Hospital Rigshospitalet; Copenhagen Denmark
| |
Collapse
|
28
|
Halberstadt AL, Geyer MA. Characterization of the head-twitch response induced by hallucinogens in mice: detection of the behavior based on the dynamics of head movement. Psychopharmacology (Berl) 2013; 227:727-39. [PMID: 23407781 PMCID: PMC3866102 DOI: 10.1007/s00213-013-3006-z] [Citation(s) in RCA: 114] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Accepted: 01/21/2013] [Indexed: 02/05/2023]
Abstract
RATIONALE The head-twitch response (HTR) is a rapid side-to-side rotational head movement that occurs in rats and mice after administration of serotonergic hallucinogens and other 5-HT2A agonists. The HTR is widely used as a behavioral assay for 5-HT2A activation and to probe for interactions between the 5-HT2A receptor and other transmitter systems. OBJECTIVE High-speed video recordings were used to analyze the head movement that occurs during head twitches in C57BL/6J mice. Experiments were also conducted in C57BL/6J mice to determine whether a head-mounted magnet and a magnetometer coil could be used to detect the HTR induced by serotonergic hallucinations based on the dynamics of the response. RESULTS Head movement during the HTR was highly rhythmic and occurred within a specific frequency range (mean head movement frequency of 90.3 Hz). Head twitches produced wave-like oscillations of magnetometer coil voltage that matched the frequency of head movement during the response. The magnetometer coil detected the HTR induced by the serotonergic hallucinogens 2,5-dimethoxy-4-iodoamphetamine (DOI; 0.25, 0.5, and 1.0 mg/kg, i.p.) and lysergic acid diethylamide (LSD; 0.05, 0.1, 0.2, and 0.4 mg/kg, i.p.) with extremely high sensitivity and specificity. Magnetometer coil recordings demonstrated that the non-hallucinogenic compounds (+)-amphetamine (2.5 and 5.0 mg/kg, i.p.) and lisuride (0.8, 1.6, and 3.2 mg/kg, i.p.) did not induce the HTR. CONCLUSIONS These studies confirm that a magnetometer coil can be used to detect the HTR induced by hallucinogens. The use of magnetometer-based HTR detection provides a high-throughput, semi-automated assay for this behavior, and offers several advantages over traditional assessment methods.
Collapse
Affiliation(s)
- Adam L Halberstadt
- Department of Psychiatry, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0804, USA.
| | | |
Collapse
|
29
|
Wu Y, Hill R, Gogos A, van den Buuse M. Sex differences and the role of estrogen in animal models of schizophrenia: Interaction with BDNF. Neuroscience 2013; 239:67-83. [DOI: 10.1016/j.neuroscience.2012.10.024] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 10/08/2012] [Accepted: 10/09/2012] [Indexed: 01/24/2023]
|
30
|
Regulating Prefrontal Cortex Activation: An Emerging Role for the 5-HT2A Serotonin Receptor in the Modulation of Emotion-Based Actions? Mol Neurobiol 2013; 48:841-53. [DOI: 10.1007/s12035-013-8472-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 05/06/2013] [Indexed: 10/26/2022]
|
31
|
Depression-like behavior is dependent on age in male SAMP8 mice. Biogerontology 2013; 14:165-76. [PMID: 23559311 DOI: 10.1007/s10522-013-9420-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Accepted: 03/23/2013] [Indexed: 12/29/2022]
Abstract
Aging is associated with an increased risk of depression in humans. To elucidate the underlying mechanisms of depression and its dependence on aging, here we study signs of depression in male SAMP8 mice. For this purpose, we used the forced swimming test (FST). The total floating time in the FST was greater in SAMP8 than in SAMR1 mice at 9 months of age; however, this difference was not observed in 12-month-old mice, when both strains are considered elderly. Of the two strains, only the SAMP8 animals responded to imipramine treatment. We also applied the dexamethasone suppression test (DST) and studied changes in the dopamine and serotonin (5-HT) uptake systems, the 5-HT2a/2c receptor density in the cortex, and levels of TPH2. The DST showed a significant difference between SAMR1 and SAMP8 mice at old age. SAMP8 exhibits an increase in 5-HT transporter density, with slight changes in 5-HT2a/2c receptor density. In conclusion, SAMP8 mice presented depression-like behavior that is dependent on senescence process, because it differs from SAMR1, senescence resistant strain.
Collapse
|
32
|
Abstract
Serotonin 1A (5-HT(1A)) receptors in brain play an important role in cognitive and integrative functions, as well as emotional states. Decreased brain-derived neurotrophic factor (BDNF) expression and/or function, particularly in hippocampus, are implicated in the pathophysiology of stress-related disorders such as major depression. BDNF(+/-) mice are more vulnerable to stress than wild-type mice, exhibiting behavioural despair after mild handling stress. We examined the effect of mild handling stress on 5-HT(1A) receptor function, as measured by 8-OH-DPAT stimulated [(35)S]GTPγS binding, in BDNF(+/-) mice and mice with a forebrain-specific reduction in BDNF (embryonic BDNF inducible knockout mice). Our data show a remarkable sensitivity of hippocampal 5-HT1A receptors to mild stress and a deficiency in BDNF. Other 5-HT(1A) receptor populations, specifically in frontal cortex and dorsal raphe, were resistant to the combined detrimental effects of mild stress and reductions in BDNF expression. Decreases in hippocampal 5-HT(1A) receptor function induced by mild stress in BDNF-deficient mice were prevented by administration of the selective serotonin reuptake inhibitor fluoxetine, which increased activation of TrkB, the high affinity receptor for BDNF, in wild-type and BDNF(+/-) mice. In hippocampal cultures, BDNF increased the capacity of 5-HT(1A) receptors to activate G proteins, an effect eliminated by the knockout of TrkB, confirming TrkB activation increases 5-HT(1A) receptor function. The mechanisms underlying the sensitivity of hippocampal 5-HT(1A) receptors to mild stress and decreased BDNF expression remain to be elucidated and may have important implications for the emotional and cognitive impairments associated with stress-related mental illness.
Collapse
|
33
|
Arai M, Genda Y, Ishikawa M, Shunsuke T, Okabe T, Sakamoto A. The miRNA and mRNA changes in rat hippocampi after chronic constriction injury. PAIN MEDICINE 2013; 14:720-9. [PMID: 23461866 DOI: 10.1111/pme.12066] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVE We elaborated the rat hippocampi in order to assess for central nervous system changes following a peripheral neuropathic injury. DESIGN, SETTING, SUBJECTS We examined the gene changes in the hippocampi of chronic constriction injury (CCI) rats with TaqMan® low-density array analysis (TLDA) and quantitative real-time polymerase chain reaction (qRT-PCR) of miR-125b, -132, and messenger RNAs (mRNAs) of neuropeptide Y, brain-derived neural factor, N-methyl-D-aspartate glutamate 2A receptor, gamma-aminobutyric acid A a1 receptor, gamma-aminobutyric acid A b1 receptor, gamma-aminobutyric acid B b2 receptor, serotonin 1A receptor, serotonin 2A receptor, serotonin 2C receptor, and serotonin 3A receptor on days 0, 7, and 15 after surgery. INTERVENTIONS None. OUTCOME MEASURES Two behavioral tests (thermal and mechanical stimulation tests) were performed three times at 5-minute intervals to assess pain thresholds. MicroRNA (miRNA) changes were examined by TLDA. mRNA changes were examined by qRT-PCR. Statistical significance was determined by Tukey-Kramer's method and paired t-test. RESULTS All rats showed mechanical and thermal hypersensitivity on the ipsilateral side. Out of 373 miRNAs analyzed, 237 were expressed, and 51 changed their expressions after CCI. By TLDA, cluster analysis found obvious miRNA changes on day 7 that tended to recover by day 15. For miR-125b, the relative expression decreased to 0.70 ± 0.30 at day 7 and recovered to 1.65 ± 0.19 at day 15. The miR-132 relative expressions were 0.69 ± 0.30 and 0.70 ± 0.15, respectively. The mRNA changes followed the miRNA changes. CONCLUSIONS Our results showed that the peripheral nerve injury altered rat hippocampal miRNA.
Collapse
Affiliation(s)
- Masae Arai
- Department of Anesthesiology and Pain Medicine, Graduate School of Nippon Medical School, Tokyo, Japan.
| | | | | | | | | | | |
Collapse
|
34
|
Induction of the plasticity-associated immediate early gene Arc by stress and hallucinogens: role of brain-derived neurotrophic factor. Int J Neuropsychopharmacol 2013; 16:405-15. [PMID: 22404904 DOI: 10.1017/s1461145712000168] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Exposure to stress and hallucinogens in adulthood evokes persistent alterations in neurocircuitry and emotional behaviour. The structural and functional changes induced by stress and hallucinogen exposure are thought to involve transcriptional alterations in specific effector immediate early genes. The immediate early gene, activity regulated cytoskeletal-associated protein (Arc), is important for both activity and experience dependent plasticity. We sought to examine whether trophic factor signalling through brain-derived neurotrophic factor (BDNF) contributes to the neocortical regulation of Arc mRNA in response to distinct stimuli such as immobilization stress and the hallucinogen 2,5-dimethoxy-4-iodoamphetamine (DOI). Acute exposure to either immobilization stress or DOI induced Arc mRNA levels within the neocortex. BDNF infusion into the neocortex led to a robust up-regulation of local Arc transcript expression. Further, baseline Arc mRNA expression in the neocortex was significantly decreased in inducible BDNF knockout mice with an adult-onset, forebrain specific BDNF loss. The induction of Arc mRNA levels in response to both acute immobilization stress or a single administration of DOI was significantly attenuated in the inducible BDNF knockout mice. Taken together, our results implicate trophic factor signalling through BDNF in the regulation of cortical Arc mRNA expression, both under baseline conditions and following stress and hallucinogen exposure. These findings suggest the possibility that the regulation of Arc expression via BDNF provides a molecular substrate for the structural and synaptic plasticity observed following stimuli such as stress and hallucinogens.
Collapse
|
35
|
Daftary SS, Calderon G, Rios M. Essential role of brain-derived neurotrophic factor in the regulation of serotonin transmission in the basolateral amygdala. Neuroscience 2012; 224:125-34. [PMID: 22917617 DOI: 10.1016/j.neuroscience.2012.08.025] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 08/08/2012] [Accepted: 08/14/2012] [Indexed: 11/30/2022]
Abstract
Human and animal model studies have linked brain-derived neurotrophic factor (BDNF) with the etiology of anxiety disorders. This pleiotropic neurotrophin and its receptor, TrkB, promote neuronal survival, differentiation and synaptic plasticity. Here we interrogated the role of BDNF in serotonergic neurotransmission in the basolateral amygdala (BLA), a limbic brain region associated with the neurobiology of anxiety. We found that both GABAergic and pyramidal projection neurons in the wild-type BLA contained TrkB receptors. Examination of BDNF(2L/2LCk-Cre) mutant mice with brain-selective depletion of BDNF revealed mild decreases in serotonin content in the BLA. Notably, whole cell recordings in BLA pyramidal cells uncovered significant alterations in 5-HT(2)-mediated regulation of GABAergic and glutamatergic transmission in BDNF(2L/2LCk-Cre) mutant mice that result in a hyperexcitable circuit. These changes were associated with decreased expression of 5-HT(2) receptors. Collectively, the results indicate a required role of BDNF in serotonin transmission in the BLA. Furthermore, they suggest a mechanism underlying the reported increase in anxiety-like behavior elicited by perturbed BDNF signaling.
Collapse
Affiliation(s)
- S S Daftary
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA 02111, USA
| | | | | |
Collapse
|
36
|
Effect of brain-derived neurotrophic factor on behavior and key members of the brain serotonin system in genetically predisposed to behavioral disorders mouse strains. Neuroscience 2012; 214:59-67. [DOI: 10.1016/j.neuroscience.2012.04.031] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 04/04/2012] [Accepted: 04/07/2012] [Indexed: 11/20/2022]
|
37
|
Naumenko VS, Tsybko AS, Bazovkina DV, Popova NK. Involvement of 5-HT2A receptors in genetic mechanisms of autoregulation of brain 5-HT system. Mol Biol 2012. [DOI: 10.1134/s0026893312020100] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
38
|
Canal CE, Morgan D. Head-twitch response in rodents induced by the hallucinogen 2,5-dimethoxy-4-iodoamphetamine: a comprehensive history, a re-evaluation of mechanisms, and its utility as a model. Drug Test Anal 2012; 4:556-76. [PMID: 22517680 DOI: 10.1002/dta.1333] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Revised: 01/09/2012] [Accepted: 01/10/2012] [Indexed: 11/06/2022]
Abstract
Two primary animal models persist for assessing hallucinogenic potential of novel compounds and for examining the pharmacological and neurobiological substrates underlying the actions of classical hallucinogens, the two-lever drug discrimination procedure and the drug-induced head-twitch response (HTR) in rodents. The substituted amphetamine hallucinogen, serotonin 2 (5-HT(2) ) receptor agonist, 2,5-dimethoxy-4-iodoamphetamine (DOI) has emerged as the most popular pharmacological tool used in HTR studies of hallucinogens. Synthesizing classic, recent, and relatively overlooked findings, addressing ostensibly conflicting observations, and considering contemporary theories in receptor and behavioural pharmacology, this review provides an up-to-date and comprehensive synopsis of DOI and the HTR model, from neural mechanisms to utility for understanding psychiatric diseases. Also presented is support for the argument that, although both the two-lever drug discrimination and the HTR models in rodents are useful for uncovering receptors, interacting proteins, intracellular signalling pathways, and neurochemical processes affected by DOI and related classical hallucinogens, results from both models suggest they are not reporting hallucinogenic experiences in animals.
Collapse
Affiliation(s)
- Clint E Canal
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA.
| | | |
Collapse
|
39
|
Vines A, Delattre AM, Lima MMS, Rodrigues LS, Suchecki D, Machado RB, Tufik S, Pereira SIR, Zanata SM, Ferraz AC. The role of 5-HT₁A receptors in fish oil-mediated increased BDNF expression in the rat hippocampus and cortex: a possible antidepressant mechanism. Neuropharmacology 2011; 62:184-91. [PMID: 21740919 DOI: 10.1016/j.neuropharm.2011.06.017] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 06/14/2011] [Accepted: 06/17/2011] [Indexed: 10/18/2022]
Abstract
Epidemiological and dietary studies show that nutritional deficit of omega-3 polyunsaturated fatty acids (ω-3 PUFA) is directly related to the prevalence and severity of depression. Supplementation with docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) during critical periods of development (pregnancy and lactation) is essential for cortical maturation, synaptogenesis and myelination, and may also mitigate the risk for cognitive deficits and psychopathologies in young adults. The present study was performed to evaluate the involvement of serotonin (5-HT) receptors, particularly of 5-HT(1A), and hippocampal brain-derived neurotrophic factor (BDNF) expression in the antidepressant effect of ω-3 PUFA supplementation. In Experiment 1, the antidepressant effects of fish oil were assessed by the modified forced swim test in adult rats. The data indicated a robust antidepressant effect produced by this supplementation and that treatment of the rats with WAY 100135 reversed this effect. In Experiment 2, cortical and hippocampal contents of BDNF, 5-HT, dopamine (DA) and its metabolites, 5-hydroxyindoleacetic acid (5-HIAA), and 3,4-dihydroxyphenylacetic acid (DOPAC), were determined in animals subjected to the same protocol. Increased BDNF expression in the cortex and hippocampus of both age groups was detected. In 90 day-old rats, 5-HT content in the hippocampus was increased, whereas 5-HIAA formation was diminished in the fish oil group. We suggest the occurrence of a reciprocal involvement of 5-HT(1A) receptors activation and the hippocampal BDNF-increased expression mediated by fish oil supplementation. These data corroborate and expand the notion that supplementation with ω-3 PUFA produces antidepressant effects mediated by an increase in serotonergic neurotransmission, particularly in the hippocampus. This article is part of a Special Issue entitled 'Anxiety and Depression'.
Collapse
Affiliation(s)
- Aparecida Vines
- Laboratório de Neurofisiologia, Departamento de Fisiologia, Universidade Federal do Paraná, 81.531-990 Curitiba, PR, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|