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Althagafy HS, Hassanein EHM. Fluoxetine attenuates chlorpyrifos-induced neuronal injury through the PPARγ, SIRT1, NF-κB, and JAK1/STAT3 signals. Int Immunopharmacol 2024; 136:112335. [PMID: 38815349 DOI: 10.1016/j.intimp.2024.112335] [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: 03/03/2024] [Revised: 05/04/2024] [Accepted: 05/21/2024] [Indexed: 06/01/2024]
Abstract
Chlorpyrifos (CPF) is a widely used organophosphate insecticide in agriculture and homes. Exposure to organophosphates is associated with neurotoxicity. Fluoxetine (FLX) is a selective serotonin reuptake inhibitor (SSRI) that is widely prescribed for depression and anxiety disorders. Studies have shown that FLX has neuroprotective, anti-inflammatory, antioxidant, and antiapoptotic effects. The molecular mechanisms underlying FLX are not fully understood. This work aimed to investigate the potential neuroprotective effect of FLX on CPF-induced neurotoxicity and the underlying molecular mechanisms involved. Thirty-two rats were randomly divided into four groups: (I) the vehicle control group; (II) the FLX-treated group (10 mg/kg/day for 28 days, p.o); (III) the CPF-treated group (10 mg/kg for 28 days); and (IV) the FLX+CPF group. FLX attenuated CPF-induced neuronal injury, as evidenced by a significant decrease in Aβ and p-Tau levels and attenuation of cerebral and hippocampal histological abrasion injury induced by CPF. FLX ameliorated neuronal oxidative stress, effectively reduced MDA production, and restored SOD and GSH levels through the coactivation of the PPARγ and SIRT1 proteins. FLX counteracted the neuronal inflammation induced by CPF by decreasing MPO, NO, TNF-α, IL-1β, and IL-6 levels by suppressing NF-κB and JAK1/STAT3 activation. The antioxidant and anti-inflammatory properties of FLX help to prevent CPF-induced neuronal intoxication.
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Affiliation(s)
- Hanan S Althagafy
- Department of Biochemistry, Faculty of Science, University of Jeddah, Jeddah, Saudi Arabia.
| | - Emad H M Hassanein
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Al-Azhar University, Assiut, Egypt
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2
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Gao Z, Xie S, Wang L, Jiang L, Zhou J, Liang M, Li G, Wang Z, Li Y, Li Y, Han G. Hypidone hydrochloride (YL-0919) protects mice from meningitis via Sigma1R-STAT1-NLRP3-GSDMD pathway. Int Immunopharmacol 2024; 128:111524. [PMID: 38232537 DOI: 10.1016/j.intimp.2024.111524] [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: 11/10/2023] [Revised: 01/06/2024] [Accepted: 01/07/2024] [Indexed: 01/19/2024]
Abstract
BACKGROUND A growing number of studies have found that antidepressants have anti-inflammatory effects while protecting nerves. Hypidone hydrochloride (YL-0919) is a novel highly selective 5-HT reuptake blocker. Our previous studies have demonstrated that YL-0919 exerts notable antidepressant- and anxiolytic-like as well as procognitive effects. However, whether YL-0919 can be used to treat inflammatory and infectious diseases remain unknown. In this study, we aimed to verify the anti-inflammatory effect of YL-0919 on bacterial meningitis and further explore the potential molecular mechanisms. METHODS We performed the experiments on pneumococcal meningitis mice in vivo and S. pneumoniae infected macrophages/microglia in vitro, with or without YL-0919 treatment. Cognitive function was evaluated by open-field task, Morris water maze test, and novel object recognition test. Histopathological staining and immunofluorescence staining were used to detect the pathological damage of meningitis and NLRP3 inflammasome activation in microglia/macrophages. The expression of the STAT1/NLRP3/GSDMD signal pathway was measured by western blots. Proinflammatory cytokines associated with pyroptosis were detected by ELISA. RESULTS YL-0919 protected mice from fatal pneumococcal meningitis, characterized by attenuated cytokine storms, decreased bacterial loads, improved neuroethology, and reduced mortality. NLRP3 plays a key role in the regulation of inflammation. When the underlying mechanisms were investigated, we found that YL-0919 inhibited the activation of NLRP3 via STAT1, and thus inhibited macrophages/microglia pyroptosis, resulting in downregulation of proinflammatory cytokines. In addition, Sigma1R was identified as a pivotal receptor that can be engaged by YL-0919 to inhibit NLRP3 activation and pyroptosis pathway in microglia/macrophages. CONCLUSIONS These results provide new insights into the mechanisms of inflammation regulation mediated by the antidepressant YL-0919. Moreover, targeting the STAT1/NLRP3 pyroptosis pathway is a promising strategy for the treatment of infectious diseases like bacterial meningitis.
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Affiliation(s)
- Zhenfang Gao
- Beijing Institute of Basic Medical Sciences, Beijing, China
| | - Shun Xie
- Beijing Institute of Basic Medical Sciences, Beijing, China
| | - Lanying Wang
- Beijing Institute of Basic Medical Sciences, Beijing, China
| | | | - Jie Zhou
- Beijing Institute of Basic Medical Sciences, Beijing, China
| | - Meng Liang
- Beijing Institute of Basic Medical Sciences, Beijing, China
| | - Ge Li
- Beijing Institute of Basic Medical Sciences, Beijing, China
| | - Zhiding Wang
- Beijing Institute of Basic Medical Sciences, Beijing, China
| | - Yuxiang Li
- Beijing Institute of Basic Medical Sciences, Beijing, China.
| | - Yunfeng Li
- Beijing Institute of Basic Medical Sciences, Beijing, China.
| | - Gencheng Han
- Beijing Institute of Basic Medical Sciences, Beijing, China.
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Sudden cessation of fluoxetine before alcohol drinking reinstatement alters microglial morphology and TLR4/inflammatory neuroadaptation in the rat brain. Brain Struct Funct 2021; 226:2243-2264. [PMID: 34236532 PMCID: PMC8354990 DOI: 10.1007/s00429-021-02321-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 06/14/2021] [Indexed: 02/05/2023]
Abstract
Preclinical studies on the effects of abrupt cessation of selective serotonin reuptake inhibitors (SSRIs), a medication often prescribed in alcohol use disorder (AUD) patients with depression, results in alcohol consumption escalation after resuming drinking. However, a potential neuroinflammatory component on this escalation remains unexplored despite the immunomodulatory role of serotonin. Here, we utilized a rat model of 14-daily administration of the SSRI fluoxetine (10 mg/kg/day) along alcohol self-administration deprivation to study the effects of fluoxetine cessation on neuroinflammation after resuming alcohol drinking. Microglial morphology and inflammatory gene expression were analyzed in prelimbic cortex, striatum, basolateral amygdala and dorsal hippocampus. Results indicated that alcohol drinking reinstatement increased microglial IBA1 immunoreactivity and altered morphometric features of activated microglia (fractal dimension, lacunarity, density, roughness, and cell area, perimeter and circularity). Despite alcohol reinstatement, fluoxetine cessation modified microglial morphology in a brain region-specific manner, resulting in hyper-ramified (spatial complexity of branching), reactive (lower heterogeneity and circularity)-like microglia. We also found that microglial cell area correlated with changes in mRNA expression of chemokines (Cx3cl1/fractalkine, Cxcl12/SDF1α, Ccl2/MCP1), cytokines (IL1β, IL6, IL10) and the innate immune toll-like receptor 4 (TLR4) in dorsal hippocampus. Specifically, TLR4 correlated with microglial spatial complexity assessed by fractal dimension in striatum, suggesting a role in process branching. These findings suggest that alcohol drinking reinstatement after fluoxetine treatment cessation disturbs microglial morphology and reactive phenotype associated with a TLR4/inflammatory response to alcohol in a brain region-specific manner, facts that might contribute to alcohol-induced damage through the promotion of escalation of alcohol drinking behavior.
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Thakare VN, Lakade SH, Mahajan MP, Kulkarni YP, Dhakane VD, Harde MT, Patel BM. Protocatechuic acid attenuates chronic unpredictable mild stress induced-behavioral and biochemical alterations in mice. Eur J Pharmacol 2021; 898:173992. [PMID: 33675783 DOI: 10.1016/j.ejphar.2021.173992] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 02/22/2021] [Accepted: 03/01/2021] [Indexed: 12/28/2022]
Abstract
Amelioration of oxidative stress via promoting the endogenous antioxidant system and enhancement of monoamines in brain were the important underlying antidepressant mechanism of protocatechuic acid (PCA). The aim of the present study is to explore the potential antidepressant mechanism(s) PCA in chronic unpredictable mild stress (CUMS) mice. Mice were subjected to CUMS protocol for 4 weeks, and administered with PCA (100 and 200 mg/kg) and fluoxetine (20 mg/kg) for 24 days (from day 8th to 31st). Behavioral (sucrose preference, immobility time, exploratory behavior), and biochemical alterations such as serum corticosterone, brain derived neurotrophic factor (BDNF), inflammatory cytokines, tumor necrosis factor- α (TNF-α), interleukin-6 (IL-6), and antioxidants parameters were investigated. Experimental findings revealed that CUMS subjected mice exhibited significant impairment in behavioral alterations, such as increased immobility time, impaired preference to the sucrose solution, BDNF levels and, serum corticosterone, cytokines, malondialdehyde (MDA) formation with impaired antioxidants in the hippocampus and cerebral cortex. Administration of PCA to CUMS mice attenuated the immobility time, serum corticosterone, cytokines TNF-α, and IL-6, MDA formation and improved sucrose preference, including restoration of BDNF level. Thus, the present findings demonstrated the antidepressant potential of PCA which is largely achieved probably through maintaining BDNF level, and by modulation of the oxidative stress response, cytokines systems, and antioxidant defense system in mice.
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Affiliation(s)
- Vishnu N Thakare
- Department of Pharmacology, Sinhgad Institute of Pharmaceutical Sciences, Lonavala, Pune, 410401, India; Department of Pharmacology, Institute of Pharmacy, Nirma University, Ahmedabad, 382 481, Gujarat, India
| | - Sameer H Lakade
- Department of Pharmacology, Sinhgad Institute of Pharmaceutical Sciences, Lonavala, Pune, 410401, India; RMD Institute of Pharmaceutical Education & Research, Pune, 411019, Maharashtra, India
| | - Moreshwar P Mahajan
- Department of Pharmacology, Sinhgad Institute of Pharmaceutical Sciences, Lonavala, Pune, 410401, India
| | - Yogesh P Kulkarni
- Department of Pharmacology, Sinhgad Institute of Pharmaceutical Sciences, Lonavala, Pune, 410401, India
| | - Valmik D Dhakane
- Research & Development, Astec Life Sciences, Mumbai, 421203, India
| | - Minal T Harde
- Department of Pharmaceutical Chemistry, PES's Modern College of Pharmacy, Nigdi, Pune, 411044, India
| | - Bhoomika M Patel
- Department of Pharmacology, Institute of Pharmacy, Nirma University, Ahmedabad, 382 481, Gujarat, India.
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He Y, Zhang X, Sun Y, Gong P, Yu H. Promotion properties of TLR7 in pediatric meningitis via the NF-κB pathway. J Bioenerg Biomembr 2021; 53:39-48. [PMID: 33428046 DOI: 10.1007/s10863-020-09862-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 11/23/2020] [Indexed: 10/22/2022]
Abstract
Meningitis outcome is associated with the severity of inflammation in the subarachnoid space and that the outcome can be improved through anti-inflammation. However, a comprehensive understanding of the molecular basis underlying inflammatory responses in meningitis remains enigmatic. In the current study, we sought to determine the molecular mechanism of TLR7/NF-κB on the development of meningitis in children. Cerebrospinal fluid of patients with meningitis and children with simple febrile convulsions was collected, and meningitis mouse model was induced. TLR7 expression was determined in the serum of meningitis model mice and the cerebrospinal fluid of patients using RT-qPCR and Western blot. Afterwards, loss- and gain- function assays were conducted to determine the functional role of TLR7 in meningitis mouse model. The level of procalcitonin (PCT) and the number of bacterial colonies in the serum were analyzed. ELISA was used to detect the expression of inflammatory factors. Upregulated level of TLR7 was observed in patients and mice with meningitis. Inhibiting the expression of TLR7 inhibited the development of meningitis. Overexpressing TLR7 can activate the NF-κB signaling pathway and promote mouse meningitis. NF-κB signaling pathway inhibitor reversed promotion of meningitis caused by TLR7 activation. Our study provides evidence that TLR7 elevation can activate the NF-κB signaling pathway and promote meningitis in mice.
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Affiliation(s)
- Yiwei He
- Department of Pediatrics, Hunan Provincial People's Hospital, Changsha, 410005, People's Republic of China
| | - Xianhua Zhang
- Department of Pediatrics, Hunan Provincial People's Hospital, Changsha, 410005, People's Republic of China
| | - Ying Sun
- Department of Neurology, Kunming Children's Hospital, No. 288, Qianxing Road, Xishan District, Kunming, 650000, Yunnan Province, People's Republic of China.
| | - Ping Gong
- Department of Pediatrics, Hunan Provincial People's Hospital, Changsha, 410005, People's Republic of China
| | - Hong Yu
- Department of Pathology, The Third People's Hospital of Shenzhen, Shenzhen, 518100, People's Republic of China
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Almeida IB, Gomes IA, Shanmugam S, de Moura TR, Magalhães LS, de Aquino LAG, de Souza Araújo AA, Oliveira PD, Santos MRV. Inflammatory modulation of fluoxetine use in patients with depression: A systematic review and meta-analysis. Cytokine 2020; 131:155100. [PMID: 32315957 DOI: 10.1016/j.cyto.2020.155100] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 04/03/2020] [Accepted: 04/11/2020] [Indexed: 02/06/2023]
Abstract
There is growing evidence that there is a relationship between major depressive disorder (MDD), also simply known as "depression", and inflammatory processes. Selective serotonin inhibitors, such as fluoxetine, are used as a first-line treatment for depression, and it is hypothesized that its use can reduce levels of proinflammatory cytokines. The aim of this systematic review and meta-analysis is to enable a better understanding of how treatment with the antidepressant fluoxetine modulates inflammation, and the roles of the main cytokines in this process. Risk of bias (RoB) in the included studies was assessed using the Cochrane Risk of Bias Assessment tool for Non-randomized studies (RoBANS). In the meta-analysis, standardized mean difference (SMD) was used as a summary statistic and grouped statistics using the generic inverse variation method in RevMan 5 with random effects model. Heterogeneous changes in cytokine levels were also evaluated from the SMD forest plot of individual studies. After analysis, we observed that fluoxetine was able to decrease TNF-α levels (SMD ± 0.90, 95% CI = 0.16, 1.165, Z ± 2.40, p = 0.02), but not change IL-6 levels (SMD ± 0.37, 95% CI = 0.21, 0.95, Z ± 1.25, p = 0.21).Fluoxetine acts by modulating neuroimmunology, and not only by acting only on the independent restoration of neurotransmission and neuroinflammation pathways.
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Affiliation(s)
- Isabella Barros Almeida
- Health Sciences Graduate Program from Universidade Federal de Sergipe - UFS, Rua Cláudio Batista S/N Bairro Sanatório, CEP 49.060-100 Aracaju, SE, Brazil.
| | - Isla Alcântara Gomes
- Departamento de Farmácia. Universidade Federal de Sergipe, Campus Universitário ''Prof. Aloísio de Campos'', 49100-000 São Cristóvão, SE, Brazil
| | - Saravanan Shanmugam
- Departamento de Farmácia. Universidade Federal de Sergipe, Campus Universitário ''Prof. Aloísio de Campos'', 49100-000 São Cristóvão, SE, Brazil
| | - Tatiana Rodrigues de Moura
- Health Sciences Graduate Program from Universidade Federal de Sergipe - UFS, Rua Cláudio Batista S/N Bairro Sanatório, CEP 49.060-100 Aracaju, SE, Brazil
| | - Lucas Sousa Magalhães
- Health Sciences Graduate Program from Universidade Federal de Sergipe - UFS, Rua Cláudio Batista S/N Bairro Sanatório, CEP 49.060-100 Aracaju, SE, Brazil
| | - Luana Aline Gonçalves de Aquino
- Health Sciences Graduate Program from Universidade Federal de Sergipe - UFS, Rua Cláudio Batista S/N Bairro Sanatório, CEP 49.060-100 Aracaju, SE, Brazil
| | - Adriano Antunes de Souza Araújo
- Departamento de Farmácia. Universidade Federal de Sergipe, Campus Universitário ''Prof. Aloísio de Campos'', 49100-000 São Cristóvão, SE, Brazil
| | - Pedro Dantas Oliveira
- Health Sciences Graduate Program from Universidade Federal de Sergipe - UFS, Rua Cláudio Batista S/N Bairro Sanatório, CEP 49.060-100 Aracaju, SE, Brazil
| | - Márcio Roberto Viana Santos
- Departamento de Fisiologia. Universidade Federal de Sergipe, Campus Universitário ''Prof. Aloísio de Campos'', 49100-000 São Cristóvão, SE, Brazil
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Peng T, Liu X, Wang J, Liu Y, Fu Z, Ma X, Li J, Sun G, Ji Y, Lu J, Wan W, Lu H. Fluoxetine-mediated inhibition of endoplasmic reticulum stress is involved in the neuroprotective effects of Parkinson's disease. Aging (Albany NY) 2019; 10:4188-4196. [PMID: 30585175 PMCID: PMC6326670 DOI: 10.18632/aging.101716] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 12/06/2018] [Indexed: 12/25/2022]
Abstract
Background: Accumulating evidence suggests that Fluoxetine (FLX), an anti-depressant drug, has broad neurobiological functions and neuroprotective effects in central nervous system injury, but its roles in Parkinson's disease (PD) remain unclear. In this study, we aimed to evaluate whether fluoxetine attenuates rotenone-induced neurodegeneration in PD. Methods: Male Sprague-Dawley rats were randomly allocated to control, rotenone-treated, rotenone + FLX-treated and FLX-treated groups. Behavioral tests including open field behavioral test and catalepsy measurement were taken to evaluate neurological behavioral measurements. Apoptosis was detected by TUNEL assay. Endoplasmic reticulum (ER)-related gene expressions were detected by qRT-PCR and western blot. Immunohistochemistry was performed to assess dopaminergic neuronal degeneration. Results: We demonstrated that pretreatment with FLX (10.0 mg/kg, i.p.) significantly ameliorated the catalepsy symptom and increased locomotor activity. In addition, FLX markedly reversed the loss of dopaminergic neurons and suppressed the X‑box‑binding protein 1 (XBP1)/caspase-3-activated ER stress. Furthermore, FLX inhibited rotenone-mediated neurodegeneration through caspase-3-mediated neuronal apoptosis. Conclusion: Taken together, our findings indicate that FLX has beneficial neuroprotective effects in PD and FLX might be a potential therapeutic agent for the treatment of PD. In light of its favorable properties, FLX should be evaluated in the treatment of PD as well as related neurologic disorders.
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Affiliation(s)
- Tao Peng
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Xiaoyan Liu
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Jingtao Wang
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yu Liu
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Zhenqiang Fu
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Xingrong Ma
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Junmin Li
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Guifang Sun
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yangfei Ji
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Jingjing Lu
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Wencui Wan
- Department of Ophthalmology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Hong Lu
- Key-Disciplines Laboratory Clinical Medicine Henan, Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
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Mishima E, Sato E, Ito J, Yamada KI, Suzuki C, Oikawa Y, Matsuhashi T, Kikuchi K, Toyohara T, Suzuki T, Ito S, Nakagawa K, Abe T. Drugs Repurposed as Antiferroptosis Agents Suppress Organ Damage, Including AKI, by Functioning as Lipid Peroxyl Radical Scavengers. J Am Soc Nephrol 2019; 31:280-296. [PMID: 31767624 DOI: 10.1681/asn.2019060570] [Citation(s) in RCA: 102] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 10/17/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Ferroptosis, nonapoptotic cell death mediated by free radical reactions and driven by the oxidative degradation of lipids, is a therapeutic target because of its role in organ damage, including AKI. Ferroptosis-causing radicals that are targeted by ferroptosis suppressors have not been unequivocally identified. Because certain cytochrome P450 substrate drugs can prevent lipid peroxidation via obscure mechanisms, we evaluated their antiferroptotic potential and used them to identify ferroptosis-causing radicals. METHODS Using a cell-based assay, we screened cytochrome P450 substrate compounds to identify drugs with antiferroptotic activity and investigated the underlying mechanism. To evaluate radical-scavenging activity, we used electron paramagnetic resonance-spin trapping methods and a fluorescence probe for lipid radicals, NBD-Pen, that we had developed. We then assessed the therapeutic potency of these drugs in mouse models of cisplatin-induced AKI and LPS/galactosamine-induced liver injury. RESULTS We identified various US Food and Drug Administration-approved drugs and hormones that have antiferroptotic properties, including rifampicin, promethazine, omeprazole, indole-3-carbinol, carvedilol, propranolol, estradiol, and thyroid hormones. The antiferroptotic drug effects were closely associated with the scavenging of lipid peroxyl radicals but not significantly related to interactions with other radicals. The elevated lipid peroxyl radical levels were associated with ferroptosis onset, and known ferroptosis suppressors, such as ferrostatin-1, also functioned as lipid peroxyl radical scavengers. The drugs exerted antiferroptotic activities in various cell types, including tubules, podocytes, and renal fibroblasts. Moreover, in mice, the drugs ameliorated AKI and liver injury, with suppression of tissue lipid peroxidation and decreased cell death. CONCLUSIONS Although elevated lipid peroxyl radical levels can trigger ferroptosis onset, some drugs that scavenge lipid peroxyl radicals can help control ferroptosis-related disorders, including AKI.
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Affiliation(s)
- Eikan Mishima
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | - Emiko Sato
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and.,Department of Clinical Pharmacology and Therapeutics, Tohoku University Graduate School of Pharmaceutical Sciences, Sendai, Japan
| | - Junya Ito
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Ken-Ichi Yamada
- Physical Chemistry for Life Science Laboratory, Faculty of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Chitose Suzuki
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | | | | | - Koichi Kikuchi
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | | | - Takehiro Suzuki
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | - Sadayoshi Ito
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and.,Katta Public General Hospital, Shiroishi, Japan; and
| | - Kiyotaka Nakagawa
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Takaaki Abe
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and.,Department of Medical Science, Tohoku University Graduate School of Biomedical Engineering, Sendai, Japan.,Department of Clinical Biology and Hormonal Regulation, Tohoku University Graduate School of Medicine, Sendai, Japan
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Liu FY, Cai J, Wang C, Ruan W, Guan GP, Pan HZ, Li JR, Qian C, Chen JS, Wang L, Chen G. Fluoxetine attenuates neuroinflammation in early brain injury after subarachnoid hemorrhage: a possible role for the regulation of TLR4/MyD88/NF-κB signaling pathway. J Neuroinflammation 2018; 15:347. [PMID: 30572907 PMCID: PMC6302437 DOI: 10.1186/s12974-018-1388-x] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 12/03/2018] [Indexed: 12/12/2022] Open
Abstract
Background Neuroinflammation is closely associated with functional outcome in subarachnoid hemorrhage (SAH) patients. Our recent study demonstrated that fluoxetine inhibited NLRP3 inflammasome activation and attenuated necrotic cell death in early brain injury after SAH, while the effects and potential mechanisms of fluoxetine on neuroinflammation after SAH have not been well-studied yet. Methods One hundred and fifty-three male SD rats were subjected to the endovascular perforation model of SAH. Fluoxetine (10 mg/kg) was administered intravenously at 6 h after SAH induction. TAK-242 (1.5 mg/kg), an exogenous TLR4 antagonist, was injected intraperitoneally 1 h after SAH. SAH grade, neurological scores, brain water content, Evans blue extravasation, immunofluorescence/TUNEL staining, quantitative real-time polymerase chain reaction (qRT-PCR), and western blot were performed. Results Fluoxetine administration attenuated BBB disruption, brain edema, and improved neurological function after SAH. In addition, fluoxetine alleviated the number of Iba-1-positive microglia/macrophages, neutrophil infiltration, and cell death. Moreover, fluoxetine reduced the levels of pro-inflammatory cytokines, downregulated the expression of TLR4 and MyD88, and promoted the nuclear translocation of NF-κB p65, which were also found in rats with TAK-242 administration. Combined administration of fluoxetine and TAK-242 did not enhance the neuroprotective effects of fluoxetine. Conclusion Fluoxetine attenuated neuroinflammation and improved neurological function in SAH rats. The potential mechanisms involved, at least in part, TLR4/MyD88/NF-κB signaling pathway. Electronic supplementary material The online version of this article (10.1186/s12974-018-1388-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fu-Yi Liu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Jing Cai
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Chun Wang
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Wu Ruan
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Guo-Ping Guan
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Hai-Zhou Pan
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Jian-Ru Li
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Cong Qian
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Jing-Sen Chen
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Lin Wang
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Gao Chen
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China.
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Santos MAO, Bezerra LS, Carvalho ARMR, Brainer-Lima AM. Global hippocampal atrophy in major depressive disorder: a meta-analysis of magnetic resonance imaging studies. TRENDS IN PSYCHIATRY AND PSYCHOTHERAPY 2018; 40:369-378. [PMID: 30234890 DOI: 10.1590/2237-6089-2017-0130] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 05/06/2018] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Major depressive disorder (MDD), an incapacitating mental disorder, is characterized by episodes of at least 2 weeks of apparent changes in mood, cognition, and neurovegetative functions. Many neuroimaging studies using magnetic resonance imaging (MRI) have examined morphometric changes in patients with MDD, but the results are not conclusive. This study aims to review the literature and perform a meta-analysis on hippocampal volume (HcV) in patients with MDD. METHODS Studies on HcV in patients with MDD diagnosis were identified from major databases (MEDLINE, EMBASE, The Cochrane Library, Scopus, PsycINFO, and SciELO) using the search terms depression, major depressive disorder, MDD, unipolar, magnetic resonance imaging, MRI, and hippocampus. RESULTS A meta-analysis of 29 studies fulfilling specific criteria was performed. The sample included 1327 patients and 1004 healthy participants. The studies were highly heterogeneous with respect to age, sex, age of onset, and average illness duration. However, the pooled effect size of depression was significant in both hippocampi. MDD was associated with right (-0.43; 95% confidence interval [95%CI] -0.66 to -0.21) and left (-0.40; 95%CI -0.66 to -0.15) hippocampal atrophy. CONCLUSIONS MDD seems to be associated with global HcV atrophy. Larger longitudinal follow-up studies designed to analyze the influence of sociodemographic variables on this relationship are required to yield better evidence about this topic.
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Affiliation(s)
- Marcelo Antônio Oliveira Santos
- Grupo de Pesquisa em Epidemiologia e Cardiologia, Universidade Federal de Pernambuco, Recife, PE, Brazil.,Centro Universitário Maurício de Nassau, Recife, PE, Brazil
| | - Lucas Soares Bezerra
- Grupo de Pesquisa em Epidemiologia e Cardiologia, Universidade Federal de Pernambuco, Recife, PE, Brazil.,Centro Universitário Maurício de Nassau, Recife, PE, Brazil
| | | | - Alessandra Mertens Brainer-Lima
- Centro Universitário Maurício de Nassau, Recife, PE, Brazil.,Pronto-Socorro Cardiológico Universitário de Pernambuco (PROCAPE), Universidade de Pernambuco (UPE), Recife, PE, Brazil
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11
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Nasher F, Förster S, Yildirim EC, Grandgirard D, Leib SL, Heller M, Hathaway LJ. Foreign peptide triggers boost in pneumococcal metabolism and growth. BMC Microbiol 2018; 18:23. [PMID: 29580217 PMCID: PMC5870813 DOI: 10.1186/s12866-018-1167-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 03/15/2018] [Indexed: 01/19/2023] Open
Abstract
Background Nonencapsulated Streptococcus pneumoniae bacteria are successful colonizers of the human nasopharynx and often possess genes aliB-like ORF 1 and 2 in place of capsule genes. AliB-like ORF 2 binds peptide FPPQSV, found in Prevotella species, resulting in enhanced colonization. How this response is mediated is so far unknown. Results Here we show that the peptide increases expression of genes involved in release of host carbohydrates, carbohydrate uptake and carbohydrate metabolism. In particular, the peptide increased expression of 1,5-anhydro-D-fructose reductase, a metabolic enzyme of an alternative starch and glycogen degrading pathway found in many organisms, in both transcriptomic and proteomic data. The peptide enhanced pneumococcal growth giving a competitive advantage to a strain with aliB-like ORF 2, over its mutant lacking the gene. Possession of aliB-like ORF 2 did not affect release of inflammatory cytokine CXCL8 from epithelial cells in culture and the nonencapsulated wild type strain was not able to establish disease or inflammation in an infant rat model of meningitis. Conclusions We propose that AliB-like ORF 2 confers an advantage in colonization by enhancing carbohydrate metabolism resulting in a boost in growth. This may explain the widespread presence of aliB-like ORF 2 in the nonencapsulated pneumococcal population in the human nasopharynx. Electronic supplementary material The online version of this article (10.1186/s12866-018-1167-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fauzy Nasher
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 51, CH-3001, Bern, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Sunniva Förster
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 51, CH-3001, Bern, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland.,Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Efe C Yildirim
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 51, CH-3001, Bern, Switzerland
| | - Denis Grandgirard
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 51, CH-3001, Bern, Switzerland
| | - Stephen L Leib
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 51, CH-3001, Bern, Switzerland
| | - Manfred Heller
- Proteomics and Mass Spectrometry Core Facility, Department for BioMedical Research, University of Bern, CH-3010, Bern, Switzerland
| | - Lucy J Hathaway
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 51, CH-3001, Bern, Switzerland.
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12
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Mitic M, Brkic Z, Lukic I, Adzic M. Convergence of glycogen synthase kinase 3β and GR signaling in response to fluoxetine treatment in chronically stressed female and male rats. Behav Brain Res 2017; 333:295-303. [PMID: 28729116 DOI: 10.1016/j.bbr.2017.07.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/07/2017] [Accepted: 07/14/2017] [Indexed: 10/19/2022]
Abstract
Accumulating evidence strongly suggest that impaired glucocorticoid receptor (GR) signaling is involved in stress-related mood disorders, and nominate GR as a potential target for antidepressants (ADs). It is known that different classes of ADs affects the GR action via modifying its phosphorylation, while the mechanism through which ADs alter GR phosphorylation targeted by GSK3β, a kinase modulated via serotonin neurotransmission, are unclear. On this basis, we investigated whether GSK3β-GR signaling could be a convergence point of fluoxetine action on brain function and behavior, by examining its effect on GSK3β targeted-GR phosphorylation on threonine 171 (pGR171), and expression of GR-regulated genes in the hippocampus of female and male rats exposed to chronic isolation stress. Stress induced sex-specific GSK3β-targeted phosphorylation of pGR171 in the nucleus of the hippocampus of stressed animals. Namely, while in females stress triggered coupled action of GSK3β-pGR171 signaling, in males changes in pGR171 levels did not correspond to GSK3β activity. On the other hand, fluoxetine managed to up-regulate this pathway in sex-unbiased manner. Furthermore, fluoxetine reverted stress-induced changes in most of the analyzed genes in males, CRH, 5-HT1a and p11, while in females its effect was limited to CRH. These data further suggest that pGR171 signaling affects cellular localization of GR in response to chronic stress and fluoxetine in both sexes. Collectively, our results describe a novel convergence point between GR signaling and GSK3β pathway in rat hippocampus in response to stress and fluoxetine in both sexes and its involvement in fluoxetine-regulated brain function in males.
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Affiliation(s)
- Milos Mitic
- Department of Molecular Biology and Endocrinology, University of Belgrade, Vinca Institute of Nuclear Sciences, P.O. Box-522-MBE090, 11001 Belgrade, Serbia.
| | - Zeljka Brkic
- Department of Molecular Biology and Endocrinology, University of Belgrade, Vinca Institute of Nuclear Sciences, P.O. Box-522-MBE090, 11001 Belgrade, Serbia
| | - Iva Lukic
- Department of Molecular Biology and Endocrinology, University of Belgrade, Vinca Institute of Nuclear Sciences, P.O. Box-522-MBE090, 11001 Belgrade, Serbia; Faculty of Medicine, Bar Ilan University, Safed, Israel
| | - Miroslav Adzic
- Department of Molecular Biology and Endocrinology, University of Belgrade, Vinca Institute of Nuclear Sciences, P.O. Box-522-MBE090, 11001 Belgrade, Serbia
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The Severity of Infection Determines the Localization of Damage and Extent of Sensorineural Hearing Loss in Experimental Pneumococcal Meningitis. J Neurosci 2017; 36:7740-9. [PMID: 27445150 DOI: 10.1523/jneurosci.0554-16.2016] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 06/09/2016] [Indexed: 12/20/2022] Open
Abstract
UNLABELLED Hearing loss is an important sequela of pneumococcal meningitis (PM), occurring in up to 30% of survivors. The role of the severity of infection on hearing function and pathomorphological consequences in the cochlea secondary to PM have not been investigated to date. Using a well-established model of PM, we systematically investigated the functional hearing outcome and the long-term fate of neurosensory cells in the cochlea, i.e., hair cells and spiral ganglion neurons (SGNs), with a focus on their tonotopic distribution. Intracisternal infection of infant rats with increasing inocula of Streptococcus pneumoniae resulted in a dose-dependent increase in CSF levels of interleukin-1β, interleukin-6, tumor necrosis factor α, interleukin-10, and interferon-γ in acute disease. The severity of long-term hearing loss at 3 weeks after infection, measured by auditory brainstem response recordings, correlated to the initial inoculum dose and to the levels of proinflammatory cytokines determined in the acute phase of PM. Quantitative cochlear histomorphology revealed a significant loss of SGNs and outer hair cells that strongly correlated to the level of infection, with the most severe damage occurring in the basal part of the cochlea. Inner hair cells (IHCs) were not significantly affected throughout the entire cochlea. However, surviving IHCs lost synaptic connectivity to remaining SGNs in all cochlear regions. These findings provide evidence that the inoculum concentration, i.e., severity of infection, is the major determinant of long-term morphological cell pathologies in the cochlea and functional hearing loss. SIGNIFICANCE STATEMENT Hearing loss is a neurofunctional deficit occurring in up to 30% of patients surviving pneumococcal meningitis (PM). Here, we analyze the correlation between the severity of infection and the inflammatory response in the CSF, the tonotopic distribution of neurosensory pathologies in the cochlea, and the long-term hearing function in a rat model of pneumococcal meningitis. Our study identifies the severity of infection as the key determinant of long-term hearing loss, underlining the importance of the prompt institution of antibiotic therapy in patients suffering from PM. Furthermore, our findings reveal in detail the spatial loss of cochlear neurosensory cells, providing new insights into the pathogenesis of meningitis-associated hearing loss that reveal new starting points for the development of otoprotective therapies.
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Hathaway LJ, Grandgirard D, Valente LG, Täuber MG, Leib SL. Streptococcus pneumoniae capsule determines disease severity in experimental pneumococcal meningitis. Open Biol 2016; 6:rsob.150269. [PMID: 27009189 PMCID: PMC4821241 DOI: 10.1098/rsob.150269] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Streptococcus pneumoniae bacteria can be characterized into over 90 serotypes according to the composition of their polysaccharide capsules. Some serotypes are common in nasopharyngeal carriage whereas others are associated with invasive disease, but when carriage serotypes do invade disease is often particularly severe. It is unknown whether disease severity is due directly to the capsule type or to other virulence factors. Here, we used a clinical pneumococcal isolate and its capsule-switch mutants to determine the effect of capsule, in isolation from the genetic background, on severity of meningitis in an infant rat model. We found that possession of a capsule was essential for causing meningitis. Serotype 6B caused significantly more mortality than 7F and this correlated with increased capsule thickness in the cerebrospinal fluid (CSF), a stronger inflammatory cytokine response in the CSF and ultimately more cortical brain damage. We conclude that capsule type has a direct effect on meningitis severity. This is an important consideration in the current era of vaccination targeting a subset of capsule types that causes serotype replacement.
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Affiliation(s)
- Lucy J Hathaway
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Bern 3001, Switzerland
| | - Denis Grandgirard
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Bern 3001, Switzerland
| | - Luca G Valente
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Bern 3001, Switzerland
| | - Martin G Täuber
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Bern 3001, Switzerland
| | - Stephen L Leib
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Bern 3001, Switzerland
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Fluoxetine ameliorates cognitive impairments induced by chronic cerebral hypoperfusion via down-regulation of HCN2 surface expression in the hippocampal CA1 area in rats. Pharmacol Biochem Behav 2016; 140:1-7. [DOI: 10.1016/j.pbb.2015.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 11/03/2015] [Accepted: 11/04/2015] [Indexed: 12/29/2022]
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