BRAIN RESEARCH BULLETIN
·
2024
·
IF 3.5
Yuqian Zhang,Shenghan Gao,Shengnan Xia,Haiyan Yang,Xinyu Bao,Qingxiu Zhang,Yun Xu
Due to various factors, there is still a lack of effective neuroprotective agents for ischemic stroke in clinical practice. Neuroinflammation and neuronal apoptosis mediated by endoplasmic reticulum stress are some of the important pathological mechanisms in ischemic stroke. Linarin has been reported to have anti-inflammation, antioxidant, and anti-apoptotic effects in myocardial ischemia, osteoarthritis, and kidney disease. Whether it exerts neuroprotective functions in ischemic stroke has not been investigated. The results showed that linarin could reduce the infarct volume in cerebral ischemia animal models, improve the neurological function scores and suppress the expression of inflammatory factors mediating the NF-κB. Meanwhile, it could protect the neurons from OGD/R-induced-apoptosis, which was related to the PERK-eIF2α pathway. Our results suggested linarin could inhibit neuronal inflammation and apoptosis induced by endoplasmic reticulum stress. Furthermore, the neuroprotective effect of linarin may be related to the inhibition of AKR1B1. Our study offers new insight into protecting against ischemia-reperfusion injury by linarin treatment in stroke.
研究领域:
神经科学
·
药理学
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2022
·
IF 3.322
Jing Cong,Yuehui Zhang,Xinming Yang,Yu Wang,Hui He,Mengying Wang
Polycystic ovary syndrome (PCOS) is a complicated endocrinopathy affecting women at reproductive age. Increasing evidence has shown the anti-PCOS effect of electroacupuncture (EA), a modified approach of traditional Chinese medical therapy “acupuncture”. However, the underlying mechanism of EA-alleviated PCOS waits further explored. In this study, experimental PCOS were induced in rats by dehydroepiandrosterone (DHEA) injection. Testosterone (T)-induced human ovarian granulosa cell (GC) line KGN was used to mimic PCOS in vitro . EA significantly alleviated histological changes and hormone disruption in PCOS rats. Besides, EA inhibited cell apoptosis, autophagy and the activation of endoplasmic reticulum (ER) stress-related PERK/eIF2α/ATF4/CHOP signaling in ovaries of PCOS rats. More interestingly, intermedin (IMD), a member of calcitonin gene-related peptide (CGRP), was evidently up-regulated in ovarian GCs after EA treatment, and its main bioactive form IMD 1-53 suppressed cell apoptosis, autophagy and PERK/eIF2α/ATF4/CHOP signaling in T-induced KGN cells. Consistent with IMD 1-53 , ER stress inhibitor 4-PBA exerted an inhibitory effect on T-induced cell apoptosis and autophagy in KGN cells. Collectively, this study validates the protective effect of EA on DHEA-induced PCOS, and proposes that IMD relieved apoptosis and autophagy in T-induced granulosa cells via inhibiting ER stress.
研究领域:
生殖医学
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内分泌学
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分子生物学
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中医学
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产品关联
DOI
PubMed
高影响因子
ACTA HISTOCHEMICA
·
2019
·
IF 1.719
Lumei Chi,Dan Jiao,Guangxian Nan,Honghua Yuan,Jing Shen,Yu Gao
Ischemic stroke (IS) is a cerebrovascular disease with serious neurological function impairment, which may activate endoplasmic reticulum (ER) stress. However, the underlying regulatory mechanism of ER stress under IS remains unclear. miR-9-5p is enriched in the brain tissues and plays a role in the pathological process of IS. Therefore, the purpose of this study is to explore the effect of miR-9 on ER stress and underlying mechanism in IS. Here, a middle cerebral artery occlusion (MCAO) rat model was utilized to examine the alteration of brain pathology, and the expressions of miR-9 and ER stress-related proteins. Then SH-SY5Y cells with oxygen-glucose deprivation (OGD) were performed to further evaluate the functional role of miR-9 and preliminary mechanism. The results showed that miR-9 levels were decreased in the ischemic region of rats after MCAO. MCAO significantly increased the brain infract volume, reduced Nissl bodies and cell apoptosis , and increased ER stress-related proteins (ERMP1, GRP78, p-PERK, p-eIF2α and CHOP). Furthermore, overexpression of miR-9 by miR-9 mimics increased cell viability , inhibited LDH activity and cell apoptosis, and inactivated ER stress in OGD-neurons. Luciferase activity results showed that miR-9 negatively regulated ERMP1 expression by directly targeting ERMP1 3′ UTR. Subsequently, we found that ERMP1 overexpression reversed the inhibition of miR-9 on GRP78-PERK−CHOP pathway in OGD neurons. In summary, our results suggest that the attenuation of miR-9 on ischemic injury may be involved in targeting ERMP1-mediated ER stress, which provides an available target for IS treatment.
研究领域:
神经科学
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分子生物学
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病理学
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产品关联
DOI
PubMed
高影响因子
CELLULAR SIGNALLING
·
2023
·
IF 4.8
Xiaoyu Liu,Beike Wang,Maolin Chang,Xiaocen Zhang,Hao Zou,Zhen Zhang,Guangli Han
The bone formation (osteogenesis) of human periodontal ligament cells (hPDLCs) under tension stress is essential for alveolar bone remodeling during orthodontic tooth movement (OTM). Deubiquitinating enzymes (DUBs) remove ubiquitin from target proteins, affecting their function and mediating cell survival and differentiation. However, whether and how DUBs regulate hPDLC function under tension force is poorly understood. In this study, we first investigated the expression of DUBs in hPDLCs under cyclic tension stimulation (CTS). Up-regulation of USP12 was observed in hPDLCs and at the tension side of molar teeth in OTM C57BL6 mice models. Knockdown (KD) of USP12 led to enhanced osteogenesis of hPDLCs under CTS. RNA-seq analysis suggested that the unfolded protein response (UPR) was the prevailing biological process in hPDLCs with USP12 KD, indicating that USP12 depletion triggered endoplasmic reticulum (ER) stress. The three major UPR-related signaling branches, namely PERK/eIF2α/ATF4, IRE1α/XBP1s, and ATF6 axis, were activated in hPDLCs with USP12 KD. By utilizing specific inhibitors, we proved that the PERK/eIF2α/ATF4 axis predominantly mediated the enhanced osteogenesis in hPDLCs with USP12 KD under CTS. In summary, our study demonstrates that USP12 serves as a key regulator for CTS-induced osteogenesis in hPDLCs, suggesting that USP12 upregulation serves as an adaptive mechanism for hPDLCs to alleviate ER stress during OTM.
研究领域:
牙科
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细胞生物学
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分子生物学
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正畸学
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DOI
PubMed
高影响因子
ENDOCRINE
·
2019
·Vol. 64
·期 3
·512-524
·
IF 3.296
Liu Xiaohong,Zeng Xin,Chen Xuanming,Luo Ruixi,Li Linzhao,Wang Chengshi,Liu Jingping,Cheng Jingqiu,Lu Yanrong,Chen Younan
Purpose It is demonstrated that unsaturated fatty acids can counteract saturated fatty acids-induced lipotoxicity, but the molecular mechanisms are unclear. In this study, we investigated the protective effects of monounsaturated oleic acid (OA) against saturated palmitic acid (PA)-induced cytotoxicity in rat β cells as well as islets, and mechanistically focused on its regulation on endoplasmic reticulum (ER) stress. Methods Rat insulinoma cell line INS-1E cells and primary islets were treated with PA with or without OA for 24 h to determine the cell viability, apoptosis, and ER stress. SD rats were fed with high-fat diet (HFD) for 16 w, then, HFD was half replaced by olive oil to observe the protective effects of monounsaturated fatty acids rich diet. Results We demonstrated that PA impaired cell viability and insulin secretion of INS-1E cells and rat islets, but OA robustly rescued cells from cell death. OA substantially alleviated either PA or chemical ER stressors (thapsigargin or tunicamycin)-induced ER stress. Importantly, OA attenuated the activity of PERK-eIF2α-ATF4-CHOP pathway and regulated the ER Ca 2+ homeostasis. In vivo, only olive oil supplementation did not cause significant changes, while high-fat diet (HFD) for 32 w obviously induced islets ER stress and impaired insulin sensitivity in SD rats. Half replacement of HFD with olive oil (a mixed diet) has ameliorated this effect. Conclusion OA alleviated PA-induced lipotoxicity in INS-1E cells and improved insulin sensitivity in HFD rats. The amelioration of PA triggered ER stress may be responsible for its beneficial effects in β cells.
研究领域:
细胞生物学
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内分泌学
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营养学
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产品关联
DOI
PubMed
高影响因子
TOXICOLOGY AND INDUSTRIAL HEALTH
·
2022
·
IF 1.851
Junyu Shen,Lushan Wang,Xuxu Wang,Jiafei Xie,Tingting Yao,Yue Yu,Qi Wang,Zhen Ding,Jinpeng Zhang,Meirong Zhang,Lichun Xu
Cypermethrin, an extensively used pyrethroid pesticide, is regarded as one of many endocrine-disrupting chemicals (EDCs) with anti-androgenic activity to damage male reproductive systems. We previously found cypermethrin-induced apoptosis in mouse Sertoli cells TM4. We hypothesized cypermethrin-induced TM4 apoptosis by the endoplasmic reticulum (ER) pathway. This study aimed to explore the roles of the ER pathway in cypermethrin-induced apoptosis in TM4 cells. The cells were treated with cypermethrin for 24 h at various concentrations (0 µM, 10 µM, 20 µM, 40 µM, and 80 µM). Flow cytometry was used to test for apoptosis. Western blot was used to test protein expressions in the ER stress pathway. The results showed that the apoptosis rate of TM4 cells increased with increased concentrations of cypermethrin, and a significant difference was detected in the 80-μM group. The protein expressions of glucose-regulated protein 78 (GRP78), protein kinase R (PKR)-like ER kinase (PERK), p-PERK, α subunit of eukaryotic initiation factor (eIF2α), p-eIF2α, activating transcription factor 4 (ATF4), C/EBP homologous protein (CHOP), caspase-12, caspase-9, and caspase-3 increased with increased concentrations of cypermethrin. The results suggested cypermethrin-induced apoptosis in TM4 cells regulated by the ER pathway involving PERK-eIF2α-ATF4-CHOP. The study provides a new insight into cypermethrin-induced apoptosis in Sertoli cells.
研究领域:
毒理学
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细胞生物学
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内分泌学
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产品关联
DOI
PubMed
高影响因子
Italian Journal of Animal Science
·
2021
·
IF 2.217
Yi Ma,Mawda Elmhadi,Chao Wang,Hao Zhang,Hongrong Wang
Several studies have demonstrated that high-concentrate (HC) diet with thiamine supplementation can alleviate rumen epithelium inflammation and protecting the barrier function in goats. This study aimed to investigate the effects of dietary supply of thiamine on mitophagy and endoplasmic reticulum stress (ERS) during high-concentrate diet feeding. Twenty-four Boer goats (35.62 ± 2.4 kg) were used in this study, goats were subsequently assigned to 3 treatment groups (8 goats in each group) as follows: a low-concentrate diet (CON; concentrate: forage 30:70), a high-concentrate diet (HC; concentrate: forage 70:30) and high-concentrate diet with 200 mg thiamine/kg DMI (HCT; concentrate: forage 70:30) for 12 weeks. Compared with the HC group, the goats of HCT group had a markedly higher final weight, net weight gain, and average daily gain (ADG). The blood physiological and biochemical results showed that the HCT group expressed a lower the content of lymphocytes and leukocytes but a higher total protein and monocytes compared with that of HC group. The rumen epithelial mitochondrial membrane potential change (ΔΨm), relative mitochondrial DNA (mtDNA) content, adenosine triphosphate (ATP) level, together with the activities of the respiratory complexes I, III, and IV were markedly higher in the HCT group relative to HC ones. Relative to the HC group, the unc-51 like autophagy activating kinase 1 (ULK1), microtubule-associated protein 1 light chain 3 (LC3), autophagy-related 5 (ATG5), autophagy related 7 (ATG7), Beclin1, PTEN induced putative kinase 1 (PINK1), PERK (PKR-Endoplasmic Reticulum Kinase), activating transcription factor 4 (ATF4), activating transcription factor 6 (ATF6), X-box binding protein 1 (XBP1), heat shock 70 kDa protein 5 (HSPA5), DNA damage-inducible transcript 3 (DDIT3) and DNA damage-inducible transcript 4 (DDIT4) mRNA levels were decreased, but the breast cancer 1 (BRCA1), ataxia telangiectasia mutated (ATM), heat shock factor binding protein 1 (HSBP1) were increased in rumen epithelium of the HCT group. The results of transmission electron micrographs showed that the cell structure of the HCT group was higher integrity than that in the HC group, and the damage degree of mitochondria as well as endoplasmic reticulum being lower than the HC group. These results demonstrated that dietary thiamine could enhance rumen epithelial integrity by suppressing the responses of ERS and mitophagy during long-term HC diet feeding.HIGHLIGHTSThis study is the first to demonstrate that the reduction of inflammatory response is related to the down-regulation of autophagy and endoplasmic reticulum stress in goats.Thiamine has good anti-inflammatory and anti-oxidation properties, which can be applied in intensive industry to reduce the negative effects caused by long-term high-concentrate diet.
研究领域:
动物营养
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分子生物学
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兽医学
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营养基因组学
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产品关联
DOI
高影响因子
ACTA PHARMACOLOGICA SINICA
·
2020
·Vol. 42
·期 3
·393-403
·
IF 5.064
Tian Jia-hui,Wu Qian,He Yong-xiang,Shen Qi-ying,Rekep Mubarak,Zhang Gui-ping,Luo Jian-dong,Xue Qin,Liu Ying-hua
Endoplasmic reticulum stress (ER stress) plays a key role in the development of cardiac hypertrophy and diabetic cardiomyopathy (DCM). Zonisamide (ZNS) was originally developed as an antiepileptic drug. Studies have shown that ZNS suppresses ER stress-induced neuronal cell damage in the experimental models of Parkinson’s disease. Herein, we investigated whether ZNS improved DCM by attenuating ER stress-induced apoptosis. C57BL/6J mice were fed with high-fat diet (HFD) and intraperitoneally injected with low-dose streptozotocin (STZ) to induce type 2 diabetes mellitus (T2DM), and then treated with ZNS (40 mg·kg −1 ·d −1 , i.g.) for 16 weeks. We showed that ZNS administration slightly ameliorated the blood glucose levels, but significantly alleviated diabetes-induced cardiac dysfunction and hypertrophy. Furthermore, ZNS administration significantly inhibited the Bax and caspase-3 activity, upregulated Bcl-2 activity, and decreased the proportion of TUNEL-positive cells in heart tissues. We analyzed the hallmarks of ER stress in heart tissues, and revealed that ZNS administration significantly decreased the protein levels of GRP78, XBP-1s, ATF6, PERK, ATF4, and CHOP, and elevated Hrd1 protein. In high glucose (HG)-treated primary cardiomyocytes, application of ZNS (3 μM) significantly alleviated HG-induced cardiomyocyte hypertrophy and apoptosis. ZNS application also suppressed activated ER stress in HG-treated cardiomyocytes. Moreover, preapplication of the specific ER stress inducer tunicamycin (10 ng/mL) eliminated the protective effects of ZNS against HG-induced cardiac hypertrophy and ER stress-mediated apoptosis. Our findings suggest that ZNS improves the cardiac diastolic function in diabetic mice and prevents T2DM-induced cardiac hypertrophy by attenuating ER stress-mediated apoptosis.
研究领域:
药理学
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心脏病学
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糖尿病
·
细胞生物学
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产品关联
DOI
PubMed
高影响因子
Advanced Therapeutics
·
2024
·Vol. 7
·期 8
·2400045
·
IF 3.7
Shanshan Wang,Zhiqiang Bi,Tianming Lu,Ruoning Qian,Jie Yu,Qiang Zhang,Hao Yang,Wenli Lu,Yuanyuan Guo,Xiaoqing Xin,Yong Bian,Ruogu Qi
Colorectal cancer (CRC) stands out as one of the most prevalent gastrointestinal cancers. Current treatment strategies for CRC are significantly hindered by systemic toxicity and suboptimal therapeutic efficacy. This study aims to overcome these limitations by developing a robust tumor-targeting chemo-photothermal strategy, combining Bortezomib (BTZ) as a proteasome inhibitor, IR780 iodide as a near-infrared dye, and Photothermal Therapy (PTT) agent, with hyaluronic acid (HA) serving as the shell for tumor targeting, denoted as HA/PB@IR780. The investigations reveal the impressive tumor-targeting affinity of HA/PB@IR780, leading to a synergistic chemo-photothermal therapeutic effect both in vitro and in vivo. Additionally, this material demonstrates the capability for drug release triggered by low pH conditions. Moreover, HA/PB@IR780 induced the generation of reactive oxygen species (ROS), triggered cells apoptosis via the PERK-CHOP-Bcl-2 pathway, and induced Immunogenic Cell Death (ICD) in CT26 cells. Importantly, HA/PB@IR780 selectively targets tumor sites, mitigating systemic toxic side effects and significantly extending the survival of CT26 tumor-bearing mice. In conclusion, this designed tumor-targeting nanocarrier represents a promising and potentially effective platform for the precise treatment of CRC.
研究领域:
肿瘤学
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纳米技术
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药理学
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细胞生物学
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治疗学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE
·
2016
·Vol. 37
·期 4
·889-900
·
IF 2.348
Jieqiong He,Chao Wang,Yunpeng Sun,Bo Lu,Jinjin Cui,Nana Dong,Maomao Zhang,Youbing Liu,Bo Yu
Exendin-4 (ex-4) is a long-acting glucagon-like peptide-1 receptor (GLP-1R) agonist which exerts beneficial effects on glycemic control and promotes cell viability. In the present study, we investigated the anti-apoptotic effects of ex-4, as well as the potential mechanisms responsible for these effects in rat bone marrow-derived mesenchymal stem cells (BM-MSCs) under conditions of oxygen, glucose and serum deprivation (OGD). The apoptosis of the MSCs was induced by subjecting the cells to OGD conditions for 4 h and was detected by Annexin V/PI and Hoechst 33258 staining. The MSCs were pre-conditioned with ex-4 for 12 h prior to being subjected to OGD conditions, and the expression levels of an apoptotic marker (cleaved caspase-3), endoplasmic reticulum (ER) stress markers [phosphorylated (p-)protein kinase RNA-like endoplasmic reticulum kinase (PERK), PERK, binding immunoglobulin protein (BIP), activating transcription factor 4 (ATF-4) and C/EBP homologous protein (CHOP)], as well as those of a survival marker (Bcl-2) were measured by western blot analysis. Furthermore, the mRNA levels of ATF-4 and CHOP were determined by RT-qPCR. ELISA was used to examine the activity of intracellular cAMP. Moreover, the GLP-1R antagonist, exendin9-39 (ex9-39), the protein kinase A (PKA) inhibitor, H89, and small interfering RNA (siRNA) targeting rat ATF-4 and CHOP were co-incubated with the MSCs. The apoptotic rate was markedly diminished following pre-conditioning with ex-4 in a dose‑dependent manner (P<0.05). The ER stress markers, p-PERK, BIP, ATF-4 and CHOP, were upregulated in the cells subjected to OGD conditions. Ex-4 pre-conditioning significantly decreased the mRNA and protein levels of ATF-4 and CHOP (P<0.05), and increased the activity of intracellular cAMP (P<0.05). Furthermore, the anti-apoptotic effects of ex-4 were almost reversed by treatment with either H89 or ex9-39 (P<0.05); transfection with siRNA-CHOP significantly reduced the apoptotic rate of the MSCs and did not impair the cytoprotective effects of ex-4. Taken together, these findings suggest that ex-4 protects rat BM-MSCs from OGD-induced apoptosis through the activation of the PKA/cAMP pathway and the attenuation of the ER stress signaling pathway. Ex-4 may thus prove to be a therapeutic agent with the potential to improve the viability of MSCs in the ischemic milieu, and consequently, to optimize the therapeutic effects of MSC therapy in acute myocardial infarction.
研究领域:
干细胞生物学
·
药理学
·
细胞信号传导
·
心血管疾病
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DOI
PubMed
高影响因子
PHYTOTHERAPY RESEARCH
·
2023
·
IF 7.2
Waimei Si,Xin Li,Bei Jing,Shiquan Chang,Yachun Zheng,Zhenni Chen,Guoping Zhao,Di Zhang
(Switching from the microglial M1 phenotype to the M2 phenotype is a promising therapeutic strategy for neuropathic pain (NP). This study aimed to investigate the potential use of stigmasterol for treating NP. In animal experiments, 32 male Sprague–Dawley rats were randomly divided into the sham operation group, chronic constriction injury (CCI) group, CCI + ibuprofen group, and CCI + stigmasterol group. We performed behavioral tests, enzyme-linked immunosorbent assay, hematoxylin-esoin staining (H&E) staining and immunohistochemistry, immunofluorescence, and Western blotting. In cell experiments, we performed flow cytometry, immunofluorescence, Western blotting, and qRT-PCR. Stigmasterol reduced thermal and mechanical hyperalgesia and serum IL-1β and IL-8 levels and increased serum IL-4 and TGF-β levels in CCI rats. Stigmasterol reduced IL-1β, COX-2, and TLR4 expression in the right sciatic nerve and IL-1β expression in the spinal cord. Stigmasterol reduced the expression of Iba-1, TLR4, MyD88, pNF-κB, pP38 MAPK, pJNK, pERK, COX-2, IL-1β, and CD32 in the spinal cord of CCI rats while increasing the expression of IL-10 and CD206. Stigmasterol decreased M1 polarization markers and increased M2 polarization markers in lipopolysaccharide (LPS)-induced microglia and decreased the expression of Iba-1, TLR4, MyD88, pNF-κB, pP38 MAPK, pJNK, pERK, iNOS, COX-2, and IL-1β in LPS-treated microglia while increasing the expression of Arg-1 and IL-10. Stigmasterol regulates microglial M1/M2 polarization via the TLR4/NF-κB pathway to alleviate NP.
研究领域:
药理学
·
神经科学
·
免疫学
·
疼痛研究
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产品关联
DOI
PubMed
高影响因子
Signal Transduction and Targeted Therapy
·
2023
·Vol. 8
·期 1
·1-16
·
IF 39.3
Cui Bopei,Song Lifang,Wang Qian,Li Kelei,He Qian,Wu Xing,Gao Fan,Liu Mingchen,An Chaoqiang,Gao Qiushuang,Hu Chaoying,Hao Xiaotian,Dong Fangyu,Zhou Jiuyue,Liu Dong,Song Ziyang,Yan Xujia,Zhang Jialu,Bai Yu,Mao Qunying,Yang Xiaoming,Liang Zhenglun
With the continuous in-depth study of the interaction mechanism between viruses and hosts, the virus has become a promising tool in cancer treatment. In fact, many oncolytic viruses with selectivity and effectiveness have been used in cancer therapy. Human enterovirus is one of the most convenient sources to generate oncolytic viruses, however, the high seroprevalence of some enteroviruses limits its application which urges to exploit more oncolytic enteroviruses. In this study, coxsackievirus B5/Faulkner (CV-B5/F) was screened for its potential oncolytic effect against non-small cell lung cancers (NSCLCs) through inducing apoptosis and autophagy. For refractory NSCLCs, DNA-dependent protein kinase (DNA-PK) or ataxia telangiectasia mutated protein (ATM) inhibitors can synergize with CV-B5/F to promote refractory cell death. Here, we showed that viral infection triggered endoplasmic reticulum (ER) stress-related pro-apoptosis and autophagy signals, whereas repair for double-stranded DNA breaks (DSBs) contributed to cell survival which can be antagonized by inhibitor-induced cell death, manifesting exacerbated DSBs, apoptosis, and autophagy. Mechanistically, PERK pathway was activated by the combination of CV-B5/F and inhibitor, and the irreversible ER stress-induced exacerbated cell death. Furthermore, the degradation of activated STING by ERphagy promoted viral replication. Meanwhile, no treatment-related deaths due to CV-B5/F and/or inhibitors occurred. Conclusively, our study identifies an oncolytic CV-B5/F and the synergistic effects of inhibitors of DNA-PK or ATM, which is a potential therapy for NSCLCs.
研究领域:
肿瘤学
·
病毒学
·
分子生物学
·
细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
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