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Khunphet P, Kumarnsit E, Issuriya A, Cheaha D. Estrogen deficiency affects synchronized neural connectivity in the olfactory bulb-nucleus accumbens circuit: A local field potential study in ovariectomized mouse model. Horm Behav 2024; 164:105587. [PMID: 38905819 DOI: 10.1016/j.yhbeh.2024.105587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 05/15/2024] [Accepted: 06/10/2024] [Indexed: 06/23/2024]
Abstract
Estrogen plays a crucial role in regulating various brain functions, including cognitive, emotional, and social behaviors. Menopausal women face a decline in estrogen levels, which has been linked to several physical and mental health issues. However, the impact of estrogen on the olfactory bulb-nucleus accumbens (OB-NAc) circuit, which is essential for regulating emotions and cognitive behaviors, remains poorly understood. To test the hypothesis that estrogen deficiency affects signal processing, we recorded local field potentials (LFPs) using intracranial electrodes implanted in four-week-old ovariectomized (OVX) mice during an open-field test (OFT). The results showed a decrease in locomotor activity and increase in anxiety-like behaviors in OVX mice. Furthermore, we found a decrease in high-gamma power in the OB. We analyzed coherence and inter-region phase-amplitude coupling (ir-PAC) to explore the connectivity between the OB and NAc. We observed a decrease in low-gamma and high-gamma coherence in OVX mice. Additionally, we found that the direction of connectivity from the NAc to the OB was disrupted in OVX mice. In summary, our study provides evidence that estrogen deficiency is linked to synchronized neural connectivity changes in the OB-NAc circuit. These findings have implications for our understanding of the roles played by the OB-NAc neural circuit and estrogen in the regulation of general exploratory behavior and anxiety-like behavior.
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Affiliation(s)
- Pakavarin Khunphet
- Biology Program, Division of Biological Sciences, Faculty of Science, Prince of Songkla University (PSU), Hatyai, Songkhla, 90110, Thailand; Biosignal Research Center for Health, Faculty of Science, Prince of Songkla University (PSU), Hatyai, Songkhla, 90110, Thailand
| | - Ekkasit Kumarnsit
- Physiology Program, Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University (PSU), Hatyai, Songkhla, 90110, Thailand; Biosignal Research Center for Health, Faculty of Science, Prince of Songkla University (PSU), Hatyai, Songkhla, 90110, Thailand
| | - Acharaporn Issuriya
- Physiology Program, Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University (PSU), Hatyai, Songkhla, 90110, Thailand; Biosignal Research Center for Health, Faculty of Science, Prince of Songkla University (PSU), Hatyai, Songkhla, 90110, Thailand
| | - Dania Cheaha
- Biology Program, Division of Biological Sciences, Faculty of Science, Prince of Songkla University (PSU), Hatyai, Songkhla, 90110, Thailand; Biosignal Research Center for Health, Faculty of Science, Prince of Songkla University (PSU), Hatyai, Songkhla, 90110, Thailand.
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Zhang Y, Tan X, Tang C. Estrogen-immuno-neuromodulation disorders in menopausal depression. J Neuroinflammation 2024; 21:159. [PMID: 38898454 PMCID: PMC11188190 DOI: 10.1186/s12974-024-03152-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Accepted: 06/11/2024] [Indexed: 06/21/2024] Open
Abstract
A significant decrease in estrogen levels puts menopausal women at high risk for major depression, which remains difficult to cure despite its relatively clear etiology. With the discovery of abnormally elevated inflammation in menopausal depressed women, immune imbalance has become a novel focus in the study of menopausal depression. In this paper, we examined the characteristics and possible mechanisms of immune imbalance caused by decreased estrogen levels during menopause and found that estrogen deficiency disrupted immune homeostasis, especially the levels of inflammatory cytokines through the ERα/ERβ/GPER-associated NLRP3/NF-κB signaling pathways. We also analyzed the destruction of the blood-brain barrier, dysfunction of neurotransmitters, blockade of BDNF synthesis, and attenuation of neuroplasticity caused by inflammatory cytokine activity, and investigated estrogen-immuno-neuromodulation disorders in menopausal depression. Current research suggests that drugs targeting inflammatory cytokines and NLRP3/NF-κB signaling molecules are promising for restoring homeostasis of the estrogen-immuno-neuromodulation system and may play a positive role in the intervention and treatment of menopausal depression.
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Affiliation(s)
- Yuling Zhang
- College of Life Science, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Xiying Tan
- Department of Neurology, Xinxiang City First People's Hospital, Xinxiang, 453000, Henan, China
| | - Chaozhi Tang
- College of Life Science, Henan Normal University, Xinxiang, 453007, Henan, China.
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3
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Shehata SA, Kolieb E, Ali DA, Maher SA, Korayem HE, Ibrahim MA, Nafie MS, Ameen SH. Selenium alleviates modafinil-induced neurobehavioral toxicity in rat via PI3K/Akt/mTOR/GSK3B signaling pathway and suppression of oxidative stress and apoptosis: in vivo and in silico study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:458-480. [PMID: 38015391 DOI: 10.1007/s11356-023-31093-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/14/2023] [Indexed: 11/29/2023]
Abstract
Nonmedical use of modafinil (MOD) led to increased rates of overdose toxicity, road accidents, addiction, withdrawal, suicide, and mental illnesses. The current study aims to determine the probable MOD brain toxicity and elucidate the possible role of selenium (Se) in ameliorating the neurotoxicity in rat models. Fifty-four male Albino rats were randomly assigned into nine groups. The groups were G1 (control negative), G2 (Se0.1), G3 (Se0.2), G4 (MOD300), G5 (MOD600), G6 (Se0.1 + MOD300), G7 (Se0.2 + MOD300), G8 (Se0.1 + MOD600), and G9 (Se0.2 + MOD600). After finishing the experiment, blood and brain tissue were harvested for biochemical and histological investigation. Neurobehavior parameters were assessed. Tissue neurotransmitter levels and oxidative stress markers were assessed. Gene expression of PI3K/Akt/mTOR-GSK3B, orexin, and orexin receptor2 was measured by qRT-PCR. Histological and immunohistochemistry assessments, as well as molecular docking, were carried out. MOD-induced neurobehavioral toxicity exhibited by behavioral and cognitive function impairments, which are associated with decreased antioxidant activities, increased MDA levels, and decreases in neurotransmitter levels. Brain levels of mRNA expression of PI3K, Akt, and mTOR were decreased, while GS3K, orexin, and orexin receptors were significantly elevated. These disturbances were confirmed by histopathological brain changes with increased silver and Bax immunostaining and decreased crystal violet levels. MOD induced neurotoxic effects in a dose-dependent manner. Compared with the MOD groups, SE coadministration significantly attenuates MOD-induced toxic changes. Docking study shows the protective role of Se as an apoptosis inhibitor and inflammation inhibitor. In conclusion, Se could be used as a biologically effective antioxidant compound to protect from MOD neurobehavioral toxicity in Wistar rats by reversing behavioral alterations, inflammation, apoptosis, and oxidative injury.
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Affiliation(s)
- Shaimaa A Shehata
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt
| | - Eman Kolieb
- Physiology Department, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt
| | - Dina A Ali
- Clinical Pharmacology Department, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt
- Center of Excellence in Molecular & Cellular Medicine, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt
| | - Shymaa Ahmed Maher
- Center of Excellence in Molecular & Cellular Medicine, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt
| | - Horeya Erfan Korayem
- Histology and Cell Biology Department, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt
| | - Mahrous A Ibrahim
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt.
- Forensic Medicine and Clinical Toxicology, College of Medicine, Jouf University, 72341, Aljouf, Saudi Arabia.
| | - Mohamed S Nafie
- Department of Chemistry, College of Sciences, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates
- Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt
| | - Shimaa H Ameen
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Zagazig University, Alsharqia, Egypt
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Sun N, Cui WQ, Min XM, Zhang GM, Liu JZ, Wu HY. A new perspective on hippocampal synaptic plasticity and post-stroke depression. Eur J Neurosci 2023; 58:2961-2984. [PMID: 37518943 DOI: 10.1111/ejn.16093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 07/01/2023] [Accepted: 07/03/2023] [Indexed: 08/01/2023]
Abstract
Post-stroke depression, a common complication after stroke, severely affects the recovery and quality of life of patients with stroke. Owing to its complex mechanisms, post-stroke depression treatment remains highly challenging. Hippocampal synaptic plasticity is one of the key factors leading to post-stroke depression; however, the precise molecular mechanisms remain unclear. Numerous studies have found that neurotrophic factors, protein kinases and neurotransmitters influence depressive behaviour by modulating hippocampal synaptic plasticity. This review further elaborates on the role of hippocampal synaptic plasticity in post-stroke depression by summarizing recent research and analysing possible molecular mechanisms. Evidence for the correlation between hippocampal mechanisms and post-stroke depression helps to better understand the pathological process of post-stroke depression and improve its treatment.
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Affiliation(s)
- Ning Sun
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Wen-Qiang Cui
- Department of Neurology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Xiao-Man Min
- College of Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Guang-Ming Zhang
- College of Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Jia-Zheng Liu
- College of Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Hong-Yun Wu
- Department of Neurology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
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Bagcioglu E, Solmaz V, Erbas O, Özkul B, Çakar B, Uyanikgil Y, Söğüt İ. Modafinil Improves Autism-like Behavior in Rats by Reducing Neuroinflammation. J Neuroimmune Pharmacol 2023; 18:9-23. [PMID: 37043086 DOI: 10.1007/s11481-023-10061-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 03/16/2023] [Indexed: 04/13/2023]
Abstract
To evaluate the ameliorating effect of Modafinil on neuroinflammation, behavioral, and histopathological alterations in rats induced by propionic acid (PPA). Thirty male Wistar rats were used in the study, divided into 3 groups of ten subjects. One group served as a control, the subjects in the other two were given 250 mg/kg/day of PPA by intraperitoneal injection over the course of 5 days to induce autism. The experimental design was as follows: Group 1: Normal control (orally-fed control, n = 10); Group 2 (PPA + saline, n = 10): PPA and 1 ml/kg/day % 0.9 NaCl saline via oral gavage; Group 3 (PPA + Modafinil, n = 10) PPA and 30 mg/kg/day Modafinil (Modiodal tablets 100 mg, Cephalon) via oral gavage. All of the groups were investigated for behavioral, biochemical, and histological abnormality. Autism-like behaviors were reduced significantly in the rats treated with PPA. TNF-α, Nerve Growth Factor (NGF), IL-17, IL-2, and NF-KB levels as well as MDA levels and lactate were significantly higher in those treated with PPA compared to the control group. Using immunohistochemical methods, the number of neurons and GFAP immunoreactivity was significantly altered in PPA-treated rats compared to the control. Using Magnetic Resonance Spectroscopy (MRS), we found that lactate levels were significantly higher in the PPA-treated rats, while creatinine levels were significantly decreased. In the rats administered with Modafinil, behavior, neuroinflammation, and histopathological changes brought about by PPA were significantly reversed. Our results demonstrate the potential role of Modafinil in ameliorating PPA-induced neuroinflammation in rats.
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Affiliation(s)
- Erman Bagcioglu
- Department of Clinical Psychology, Ruhr University, Bochum, Germany.
| | - Volkan Solmaz
- Department of Neurophysiology, Cologne University, Cologne, Germany
| | - Oytun Erbas
- Department of Physiology, Istanbul Bilim University School of Medicine, Istanbul, Turkey
| | - Bahattin Özkul
- Department of Radiology, Istanbul Atlas University, Istanbul, Turkey
| | - Burak Çakar
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - Yigit Uyanikgil
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - İbrahim Söğüt
- Department of Biochemistry, Demiroğlu Bilim University, Istanbul, Turkey
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Yu S, Zhang L, Wang Y, Yan J, Wang Q, Bian H, Huang L. Mood, hormone levels, metabolic and sleep across the menopausal transition in VCD-induced ICR mice. Physiol Behav 2023; 265:114178. [PMID: 37001841 DOI: 10.1016/j.physbeh.2023.114178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 02/27/2023] [Accepted: 03/24/2023] [Indexed: 03/31/2023]
Abstract
AIMS Menopausal transition is the transitional period before menopause in women, often accompanied by abnormal fluctuations in hormone levels that increase the risk of aging-related diseases. 4-vinylcyclohexene dioxide (VCD) is a chemical agent that induces gradual depletion of ovarian follicles, which can mimic the natural human process of transition from menopausal transition to post-menopause. Previous studies have shown that the onset of menopausal transition or menopause in VCD-injected mice is associated with a specific strain, even in inbred animals. Institute of Cancer Research (ICR) mice constitute general purpose outbred population, which has not been well-characterized in the VCD-induced model. Thus, the current study aimed to explore the characteristic features, including sleep, mood, and metabolism, of the model by examining the effect of timing of VCD injection in ICR mice to extend the applications of this model. MATERIALS AND METHODS ICR mice were randomly divided into six groups: 20d VCD and 20d Control, 35d VCD and 35d Control, 52d VCD and 52d Control. VCD mice were intraperitoneally injected with VCD (160 mg/kg), while Control mice were injected intraperitoneally with sesame oil for 4 consecutive weeks, five times a week daily. A vaginal smear was used to observe the estrous cycle of the mice. On the 20th, 35th, and 52nd day after VCD or sesame oil injection, the ovarian morphology, the number of atretic cells, hormone levels, anxiety, depression-like behaviors, sleep phase, and energy metabolism were observed. KEY FINDINGS The menopausal transition model was successfully replicated by injecting VCD into ICR mice. On the specific days after VCD treatment, the number of atretic follicles increased, the level of E2 decreased and FSH increased, the depressive- and anxiety-like behavior increased, the time of REM and NREM sleep time decreased, and energy metabolism was reduced. SIGNIFICANCE These results suggested that the ICR mice model has human-like characteristics during the menopause transition. Moreover, the ICR model has a long menopausal transition duration.
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Affiliation(s)
- Shuang Yu
- Key Laboratory of Chinese Materia Medica (Ministry of Education), Heilongjiang University of Chinese Medicine, No. 24, Heping Road, Harbin 150040, China
| | - Lixin Zhang
- Key Laboratory of Chinese Materia Medica (Ministry of Education), Heilongjiang University of Chinese Medicine, No. 24, Heping Road, Harbin 150040, China
| | - Yanyan Wang
- Key Laboratory of Chinese Materia Medica (Ministry of Education), Heilongjiang University of Chinese Medicine, No. 24, Heping Road, Harbin 150040, China
| | - Jinming Yan
- Key Laboratory of Chinese Materia Medica (Ministry of Education), Heilongjiang University of Chinese Medicine, No. 24, Heping Road, Harbin 150040, China
| | - Qi Wang
- Key Laboratory of Chinese Materia Medica (Ministry of Education), Heilongjiang University of Chinese Medicine, No. 24, Heping Road, Harbin 150040, China
| | - Hongsheng Bian
- Key Laboratory of Chinese Materia Medica (Ministry of Education), Heilongjiang University of Chinese Medicine, No. 24, Heping Road, Harbin 150040, China
| | - Lili Huang
- Key Laboratory of Chinese Materia Medica (Ministry of Education), Heilongjiang University of Chinese Medicine, No. 24, Heping Road, Harbin 150040, China.
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Walsh MJM, Gibson K, Hynd M, Eisenlohr-Moul TA, Walsh EC, Schiff L, Jarskog F, Lalush D, Dichter GS, Schiller CE. Perimenopausal Effects of Estradiol on Anhedonia and Psychosis Study (PEEPs): study protocol for a neural and molecular mechanistic clinical trial. Trials 2023; 24:150. [PMID: 36855177 PMCID: PMC9976383 DOI: 10.1186/s13063-023-07166-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Accepted: 02/13/2023] [Indexed: 03/02/2023] Open
Abstract
BACKGROUND The perimenopausal transition is accompanied by psychiatric symptoms in over 10% of women. Symptoms commonly include depressed mood and anhedonia and less commonly include psychosis. Psychiatric symptoms have been linked to the depletion and/or variability of circulating estradiol, and estradiol treatment reduces perimenopausal anhedonia and psychosis in some women. Estrogen fluctuations may disrupt function in the mesolimbic reward system in some women, leading to psychiatric symptoms like anhedonia or psychosis. The Perimenopausal Effects of Estradiol on Anhedonia and Psychosis Study (PEEPs) is a mechanistic clinical trial that aims to (1) identify relationships between perimenopausal-onset anhedonia and psychosis and neuromolecular markers of mesolimbic reward responses and (2) determine the extent to which estradiol treatment-induced changes in mesolimbic reward responses are associated with alleviation of perimenopausal onset anhedonia or psychosis. METHODS This study will recruit 100 unmedicated women ages 44-55 in the late-stage perimenopausal transition, sampling across the range of mild-to-high anhedonia and absent-to-moderate psychosis symptoms. Patients will be randomized to receive either estradiol or placebo treatment for 3 weeks. Clinical outcome measures will include symptoms of anhedonia (measured with Snaith-Hamilton Pleasure Scale; SHAPS) and psychosis (measured with Brief Psychiatric Rating Scale; BPRS psychosis subscale) as well as neural markers of mesolimbic reward system functioning, including reward-related fMRI activation and PET-derived measure of striatal dopamine binding. Pre-treatment associations between (1) SHAPS/BPRS scores and (2) reward-related striatal dopamine binding/BOLD activation will be examined. Furthermore, longitudinal mixed models will be used to estimate (1) symptom and neuromolecular trajectories as a function of estradiol vs. placebo treatment and (2) how changes in reward-related striatal dopamine binding and BOLD activation predict variability in symptom trajectories in response to estradiol treatment. DISCUSSION This clinical trial will be the first to characterize neural and molecular mechanisms by which estradiol treatment ameliorates anhedonia and psychosis symptoms during the perimenopausal transition, thus laying the groundwork for future biomarker research to predict susceptibility and prognosis and develop targeted treatments for perimenopausal psychiatric symptoms. Furthermore, in alignment with the National Institute for Mental Health Research Domain Criteria initiative, this trial will improve our understanding of a range of disorders characterized by anhedonia, psychosis, and reward system dysfunction. TRIAL REGISTRATION ClinicalTrials.gov NCT05282277.
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Affiliation(s)
- Melissa J M Walsh
- Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, 27510, USA.
- Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA.
| | - Kathryn Gibson
- Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, 27510, USA
| | - Megan Hynd
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
| | | | - Erin C Walsh
- Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
| | - Lauren Schiff
- Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Fred Jarskog
- Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
- North Carolina Psychiatric Research Center, Raleigh, NC, 27610, USA
| | - David Lalush
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, USA
| | - Gabriel S Dichter
- Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, 27510, USA
- Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
| | - Crystal E Schiller
- Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
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Zhao YN, Jiang JB, Tao SY, Zhang Y, Chen ZK, Qu WM, Huang ZL, Yang SR. GABAergic neurons in the rostromedial tegmental nucleus are essential for rapid eye movement sleep suppression. Nat Commun 2022; 13:7552. [PMID: 36477665 PMCID: PMC9729601 DOI: 10.1038/s41467-022-35299-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 11/23/2022] [Indexed: 12/12/2022] Open
Abstract
Rapid eye movement (REM) sleep disturbances are prevalent in various psychiatric disorders. However, the neural circuits that regulate REM sleep remain poorly understood. Here, we found that in male mice, optogenetic activation of rostromedial tegmental nucleus (RMTg) GABAergic neurons immediately converted REM sleep to arousal and then initiated non-REM (NREM) sleep. Conversely, laser-mediated inactivation completely converted NREM to REM sleep and prolonged REM sleep duration. The activity of RMTg GABAergic neurons increased to a high discharge level at the termination of REM sleep. RMTg GABAergic neurons directly converted REM sleep to wakefulness and NREM sleep via inhibitory projections to the laterodorsal tegmentum (LDT) and lateral hypothalamus (LH), respectively. Furthermore, LDT glutamatergic neurons were responsible for the REM sleep-wake transitions following photostimulation of the RMTgGABA-LDT circuit. Thus, RMTg GABAergic neurons are essential for suppressing the induction and maintenance of REM sleep.
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Affiliation(s)
- Ya-Nan Zhao
- grid.8547.e0000 0001 0125 2443Department of Pharmacology, School of Basic Medical Sciences; State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science; Institutes of Brain Science, Fudan University, Shanghai, 200032 China
| | - Jian-Bo Jiang
- grid.8547.e0000 0001 0125 2443Department of Pharmacology, School of Basic Medical Sciences; State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science; Institutes of Brain Science, Fudan University, Shanghai, 200032 China
| | - Shi-Yuan Tao
- grid.8547.e0000 0001 0125 2443Department of Pharmacology, School of Basic Medical Sciences; State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science; Institutes of Brain Science, Fudan University, Shanghai, 200032 China
| | - Yang Zhang
- grid.8547.e0000 0001 0125 2443Department of Pharmacology, School of Basic Medical Sciences; State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science; Institutes of Brain Science, Fudan University, Shanghai, 200032 China
| | - Ze-Ka Chen
- grid.8547.e0000 0001 0125 2443Department of Pharmacology, School of Basic Medical Sciences; State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science; Institutes of Brain Science, Fudan University, Shanghai, 200032 China
| | - Wei-Min Qu
- grid.8547.e0000 0001 0125 2443Department of Pharmacology, School of Basic Medical Sciences; State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science; Institutes of Brain Science, Fudan University, Shanghai, 200032 China
| | - Zhi-Li Huang
- grid.8547.e0000 0001 0125 2443Department of Pharmacology, School of Basic Medical Sciences; State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science; Institutes of Brain Science, Fudan University, Shanghai, 200032 China
| | - Su-Rong Yang
- grid.8547.e0000 0001 0125 2443Department of Pharmacology, School of Basic Medical Sciences; State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science; Institutes of Brain Science, Fudan University, Shanghai, 200032 China
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Zhao YN, Zhang Y, Tao SY, Huang ZL, Qu WM, Yang SR. Whole-Brain Monosynaptic Afferents to Rostromedial Tegmental Nucleus Gamma-Aminobutyric Acid-Releasing Neurons in Mice. Front Neurosci 2022; 16:914300. [PMID: 35733933 PMCID: PMC9207306 DOI: 10.3389/fnins.2022.914300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 05/16/2022] [Indexed: 12/02/2022] Open
Abstract
Increasing evidence has revealed that the rostromedial tegmental area (RMTg) mediates many behaviors, including sleep and addiction. However, presynaptic patterns governing the activity of γ-aminobutyric acid-releasing (GABAergic) neurons, the main neuronal type in the RMTg, have not been defined. Here, we used cell-type-specific retrograde trans-synaptic rabies viruses to map and quantify the monosynaptic afferents to RMTg GABAergic neurons in mouse whole brains. We identified 71 ascending projection brain regions. Sixty-eight percent of the input neurons arise from the ipsilateral and 32% from the contralateral areas of the brain. The first three strongest projection regions were the ipsilateral lateral hypothalamus, zone incerta, and contralateral pontine reticular nucleus. Immunohistochemistry imaging showed that the input neurons in the dorsal raphe, laterodorsal tegmentum, and dorsal part of zone incerta were colocalized with serotoninergic, cholinergic, and neuronal nitric oxide synthetase-expressing neurons, respectively. However, in the lateral hypothalamus, a few input neurons innervating RMTg GABAergic neurons colocalized orexinergic neurons but lacked colocalization of melanin-concentrating hormone neurons. Our findings provide anatomical evidence to understand how RMTg GABAergic neurons integrate diverse information to exert varied functions.
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10
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Rana AK, Sharma S, Patial V, Singh D. Lithium therapy subdues neuroinflammation to maintain pyramidal cells arborization and rescues neurobehavioural impairments in ovariectomized rats. Mol Neurobiol 2022; 59:1706-1723. [PMID: 35018576 DOI: 10.1007/s12035-021-02719-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 12/23/2021] [Indexed: 12/17/2022]
Abstract
Oestrogen deprivation as a consequence of menopause alters the brain neuronal circuit and results in the development of neurobehavioural symptoms later. Hormone replacement therapy to some extent helps to overcome these abnormalities but is associated with various adverse events. Lithium therapy is being used to manage multiple neuropsychiatric disorders and is reported to maintain structural synaptic plasticity, suppress neuroinflammation, and promote adult neurogenesis. The present study examined the effect of lithium treatment on the neurobehavioural impairments in ovariectomized rat model mimicking clinical postmenopausal condition. A protective effect of lithium treatment was observed on the reconsolidation of spatial and recognition memory along with depression-like behaviour in ovariectomized rats. The Golgi-Cox staining revealed increased dendritic length and spine density in the pyramidal neurons of the CA1 region of the hippocampus, layer V of the somatosensory cortex, and layer II/III of the prefrontal cortex in the treated group. A significant reduction in pro-inflammatory markers, Il2, II6, and Il1b, was observed in the hippocampus, somatosensory cortex, and prefrontal cortex following lithium treatment. mRNA expression studies of Gfap and Pparg, along with histopathological analysis, suggested reactive astrogliosis to be a major contributor of neuroinflammation in ovariectomized rats that was normalized following lithium treatment. Further, the treatment inhibited Gsk-3β activity and maintained the normal level of β-catenin, CREB, and BDNF. The results revealed a defensive role of lithium against ovariectomy-induced neurobehavioural impairments, thus suggesting it to be a potential therapeutic agent for managing postmenopausal neurological symptoms.
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Affiliation(s)
- Anil Kumar Rana
- Pharmacology and Toxicology Laboratory, Dietetics and Nutrition Technology Division, CSIR-Institute of Himalayan Bioresource Technology, 176061, Palampur, Himachal Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Supriya Sharma
- Pharmacology and Toxicology Laboratory, Dietetics and Nutrition Technology Division, CSIR-Institute of Himalayan Bioresource Technology, 176061, Palampur, Himachal Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Vikram Patial
- Pharmacology and Toxicology Laboratory, Dietetics and Nutrition Technology Division, CSIR-Institute of Himalayan Bioresource Technology, 176061, Palampur, Himachal Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Damanpreet Singh
- Pharmacology and Toxicology Laboratory, Dietetics and Nutrition Technology Division, CSIR-Institute of Himalayan Bioresource Technology, 176061, Palampur, Himachal Pradesh, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Huang L, He S, Cai Q, Li F, Wang S, Tao K, Xi Y, Qin H, Gao G, Feng D. Polydatin alleviates traumatic brain injury: Role of inhibiting ferroptosis. Biochem Biophys Res Commun 2021; 556:149-155. [PMID: 33839410 DOI: 10.1016/j.bbrc.2021.03.108] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 03/19/2021] [Indexed: 02/09/2023]
Abstract
Secondary injury is the main cause of high mortality and poor prognosis of TBI, which has recently been suggested to be related to ferroptosis. Polydatin, a monocrystalline compound extracted from the rhizome of Polygonum, has been shown to exert potential neuroprotective effects. However, its role and mechanism in the secondary injury of TBI has not been elucidated. In this study, the inhibition of Polydatin on ferroptosis was observed both in the hemoglobin treated Neuro2A cells in vitro and in TBI mouse model in vivo, characterized by reversion of accumulation or deposition of free Fe2+, increased content of MDA, decreased activity of key REDOX enzyme GPx4, cell death and tissues loss. Although Polydatin corrected the increased mRNA levels of ferroptosis signaling molecules GPX4, SLC7A11, PTGS2, and ATP5G3 after TBI, TBI and Polydatin treatment had no significant effect on their protein expression. Notably, Polydatin could completely reverse the decrease of GPx4 activity after TBI in vivo and in vitro, and the effect was stronger than that of the classical ferroptosis inhibitor FER-1 in vitro. Further, Polydatin has been shown to reduce the severity of acute neurological impairment and significantly improve subacute motor dysfunction in TBI mice. Our findings provided translational insight into neuroprotection with Polydatin in TBI by inhibiting ferroptosis mainly depending on the maintenance of GPx4 activity.
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Affiliation(s)
- Lu Huang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Shulei He
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Qing Cai
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Fei Li
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Siwei Wang
- School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710038, China
| | - Kai Tao
- Department of Emergency, The General Hospital of Western Theater Command, Chengdu, 610083, China
| | - Ye Xi
- Department of Neurobiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, 710038, China
| | - Huaizhou Qin
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Guodong Gao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Dayun Feng
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China.
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