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Adachi N, Sakhri FZ, Ikemoto H, Ohashi Y, Kato M, Inoue T, Hisamitsu T, Sunagawa M. Kamikihito rescued depressive-like behaviors and hippocampus neurogenesis in chronic restraint stress rats. J Tradit Complement Med 2022; 12:172-179. [PMID: 35528472 PMCID: PMC9072803 DOI: 10.1016/j.jtcme.2021.08.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 06/25/2021] [Accepted: 08/02/2021] [Indexed: 11/18/2022] Open
Abstract
Background and aim Substantial evidence suggests the effectiveness of plant-based medicine in stress-related diseases. Kamikihito (KKT), a Japanese traditional herbal medicine (Kampo), has been used for anemia, insomnia, and anxiety. Recent studies revealed its ameliorating effect on cognitive and memory dysfunction in several animal models. We, therefore, determined whether daily supplementation of KKT has an antidepressant-like effect on the stress-induced behavioral and neurological changes in rats. Experimental procedure The effect of KKT against the stress-induced changes in anxiety- and depressive-like behaviors and hippocampal neurogenesis were determined using a rat model of chronic restraint stress (CRS). KKT was orally administered daily at 300 or 1000 mg/kg during 21 consecutive days of CRS (6 h/day). The effect of CRS and KKT on physiological parameters, including body weight gain, food/water consumptions, plasma corticosterone (CORT) levels, and percentage of adrenal gland weight to body weight, were firstly measured. Anxiety- and depressive-like behaviors in rats were assessed in the open field test (OFT), sucrose preference test (SPT), and forced swimming test (FST). Hippocampal neurogenesis was determined by immunohistochemistry. Results and conclusion CRS for 21 days caused a significant decrease in body weight gain and increase in plasma CORT levels and percentage of adrenal gland weight to body weight, which were rescued by KKT treatment. KKT also suppressed the CRS-induced anxiety- and depressive-like behaviors and impairment of hippocampal neurogenesis. These results suggest that daily treatment of KKT has a protective effect against physiological, neurological, and behavioral changes in a rat model of depression.
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Key Words
- Antidepressant-like effect
- BDNF, brain-derived neurotrophic factor
- CORT, corticosterone
- CRS, chronic restraint stress
- Chronic restraint stress
- DCX, doublecortin
- DG, dentate gyrus
- DNA, methyltransferase
- FST, forced swimming test
- HPA, hypothalamus-pituitary-adrenal
- Hippocampal neurogenesis
- KKT, Kamikihito
- Kamikihito (加味帰脾湯)
- MAO, monoamine oxidase
- MDD, major depressive disorder
- Major depressive disorder
- NSPCs, neural progenitor/stem cells
- OFT, open field test
- ROS, reactive oxygen species
- SPT, sucrose preference test
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Affiliation(s)
- Naoki Adachi
- Department of Physiology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Fatma Zahra Sakhri
- Department of Physiology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
- Department of Animal Biology, University of Freres Mentouri Constantine-Algeria, 25000, Constantine, Algeria
| | - Hideshi Ikemoto
- Department of Physiology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Yusuke Ohashi
- Department of Physiology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Mami Kato
- Department of Physiology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Tatsuki Inoue
- Department of Physiology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Tadashi Hisamitsu
- Department of Physiology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Masataka Sunagawa
- Department of Physiology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
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Borodovitsyna O, Duffy BC, Pickering AE, Chandler DJ. Anatomically and functionally distinct locus coeruleus efferents mediate opposing effects on anxiety-like behavior. Neurobiol Stress 2020; 13:100284. [PMID: 33344735 PMCID: PMC7739179 DOI: 10.1016/j.ynstr.2020.100284] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/19/2020] [Accepted: 12/02/2020] [Indexed: 01/08/2023] Open
Abstract
The locus coeruleus (LC) is a critical node in the stress response, and its activation has been shown to promote hypervigilance and anxiety-like behavior. This noradrenergic nucleus has historically been considered homogeneous with highly divergent neurons that operate en masse to collectively affect central nervous system function and behavioral state. However, in recent years, LC has been identified as a heterogeneous structure whose neurons innervate discrete terminal fields and contribute to distinct aspects of behavior. We have previously shown that in late adolescent male rats, an acute traumatic stressor, simultaneous physical restraint and exposure to predator odor, preferentially induces c-Fos expression in a subset of dorsal LC neurons and persistently increases anxiety-like behavior. To investigate how these neurons respond to and contribute to the behavioral response to stress, we used a combination of retrograde tracing, whole-cell patch clamp electrophysiology, and chemogenetics. Here we show that LC neurons innervating the central nucleus of the amygdala (CeA) and medial prefrontal cortex (mPFC) undergo distinct electrophysiological changes in response to stressor exposure and have opposing roles in mediating anxiety-like behavior. While neurons innervating CeA become more excitable in response to stress and promote anxiety-like behavior, those innervating mPFC become less excitable and appear to promote exploration. These findings show that LC neurons innervating distinct terminal fields have unique physiological responses to particular stimuli. Furthermore, these observations advance the understanding of the LC as a complex and heterogeneous structure whose neurons maintain unique roles in various forms of behavior. Locus coeruleus-central amygdala projections are hyperactive one week after stress. Locus coeruleus-prefrontal cortex projections are hypoactive one week after stress. Chemogenetic manipulation of each pathway distinctly affects anxiety-like behavior.
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Key Words
- AHP, afterhyperpolarization
- Anxiety-like behavior
- CRF, corticotropin releasing factor
- CeA, central nucleus of the amygdala
- Central nucleus of amygdala
- EPM, elevated plus maze
- LC, locus coeruleus
- Locus coeruleus
- Medial prefrontal cortex
- NE, norepinephrine
- OFT, open field test
- PBS, phosphate buffered saline
- Stress
- TMT, 2,4,5-trimethylthiazole
- aCSF, artificial cerebrospinal fluid
- mPFC, medial prefrontal cortex
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Affiliation(s)
- Olga Borodovitsyna
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, 42 E. Laurel Road, Stratford, NJ, 08084, USA
| | - Brenna C Duffy
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, 42 E. Laurel Road, Stratford, NJ, 08084, USA
| | - Anthony E Pickering
- School of Physiology, Pharmacology & Neuroscience, University of Bristol, Biomedical Sciences Building, University Walk, Bristol, BS81TD, UK
| | - Daniel J Chandler
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, 42 E. Laurel Road, Stratford, NJ, 08084, USA
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