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Sodium selenite promotes neurological function recovery after spinal cord injury by inhibiting ferroptosis 被引量:4
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作者 Yi-Xin Chen Talifu Zuliyaer +7 位作者 Bin Liu Shuang Guo De-Gang Yang Feng Gao Yan Yu Ming-Liang Yang Liang-Jie Du Jian-Jun Li 《Neural Regeneration Research》 SCIE CAS CSCD 2022年第12期2702-2709,共8页
Ferroptosis is a recently discovered form of iron-dependent cell death,which occurs during the pathological process of various central nervous system diseases or injuries,including secondary spinal cord injury.Seleniu... Ferroptosis is a recently discovered form of iron-dependent cell death,which occurs during the pathological process of various central nervous system diseases or injuries,including secondary spinal cord injury.Selenium has been shown to promote neurological function recovery after cerebral hemorrhage by inhibiting ferroptosis.However,whether selenium can promote neurological function recovery after spinal cord injury as well as the underlying mechanism remain poorly understood.In this study,we injected sodium selenite(3μL,2.5μM)into the injury site of a rat model of T10 vertebral contusion injury 10 minutes after spinal cord injury modeling.We found that sodium selenite treatment greatly decreased iron concentration and levels of the lipid peroxidation products malondialdehyde and 4-hydroxynonenal.Furthermore,sodium selenite increased the protein and mRNA expression of specificity protein 1 and glutathione peroxidase 4,promoted the survival of neurons and oligodendrocytes,inhibited the proliferation of astrocytes,and promoted the recovery of locomotive function of rats with spinal cord injury.These findings suggest that sodium selenite can improve the locomotive function of rats with spinal cord injury possibly through the inhibition of ferroptosis via the specificity protein 1/glutathione peroxidase 4 pathway. 展开更多
关键词 ferroptosis glutathione peroxidase 4 GLUTATHIONE IRON lipid peroxidation neural regeneration secondary injury sodium selenite specificity protein 1 spinal cord injury
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Sodium selenite ameliorates dextran sulfate sodiuminduced chronic colitis in mice by decreasing Th1, Th17, and γδT and increasing CD4(+)CD25(+) regulatory T-cell responses 被引量:2
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作者 Li-Xuan Sang Bing Chang +6 位作者 Jun-Feng Zhu Fang-Li Yang Yan Li Xue-Feng Jiang Da-Nan Wang Chang-Long Lu Xun Sun 《World Journal of Gastroenterology》 SCIE CAS 2017年第21期3850-3863,共14页
AIM To assess the effect of sodium selenite on the severity of dextran sulfate sodium(DSS)-induced colitis in C57BL/6 mice.METHODS Mice were randomly divided into four groups(n = 10/group): normal group, selenium(Se) ... AIM To assess the effect of sodium selenite on the severity of dextran sulfate sodium(DSS)-induced colitis in C57BL/6 mice.METHODS Mice were randomly divided into four groups(n = 10/group): normal group, selenium(Se) group, chronic colitis group, and Se + chronic colitis group. The mice were sacrificed on day 26. Survival rates, clinical symptoms, colon length, and histological changes were determined. The percentages and absolute numbers of immune system cells in the lamina propria lymphocytes(LPL) of the colon, the expression of m RNA in colon tissue, and the concentrations of Th1, Th17, and Treg cytokines in LPL from the large intestine, were measured.RESULTS Se significantly ameliorated the symptoms of colitis and histological injury(P < 0.05 each), increasing the proportions of neutrophils and CD4+ CD25+ T cells(P < 0.05 each) and decreasing the proportions of γδT cells, CD4+, CD4+CD44+, and CD4+ CD69+ T cells in LPL(P < 0.05 each). Moreover, Se reduced the expression of IL-6, IFN-γ, IL-17 A, IL-21, T-bet, and RORγt(P < 0.05 each), but enhanced the expression of IL-10 and Foxp3(P < 0.05 each). CONCLUSION These results suggest that Se protects against DSSinduced chronic colitis perhaps by increasing the number of CD4(+)CD25(+) Tregs that suppress the secretion of proinflammatory cytokines and populations of Th1, Th17, and γδT cells. 展开更多
关键词 sodium selenite Dextran sulfate sodium Chronic colitis
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Protective Role of C-Phycocyanin Against Secondary Changes During Sodium Selenite Mediated Cataractogenesis
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作者 Rasiah Pratheepa Kumari Kumarasamy Anbarasu 《Natural Products and Bioprospecting》 CAS 2014年第2期81-89,共9页
Age related cataract is the leading cause of blindness associated with accumulation of oxidative stress in the eye lens.The present investigation reveals the rational of the beneficial effects of the natural compound ... Age related cataract is the leading cause of blindness associated with accumulation of oxidative stress in the eye lens.The present investigation reveals the rational of the beneficial effects of the natural compound C-phycocyanin(CPC)is beneficial when administered to rat pups to protect against the secondary effects of sodium selenite induced cataractogenesis.A single subcutaneous dose of sodium selenite(19 lmol/kg body weight)on the 10th day of postpartum is adequate to induce cataract in rat pups.Serum biochemical parameters,such as the level of electrolytes,mean activities of anti-oxidant enzymes i.e.superoxide dismutase,catalase and reduced glutathione were observed to be significantly altered during selenite induced cataractogenic process.Histopathological examination revealed signs of degradation of normal cell architecture in the liver,kidney and eye lens.Interestingly,the deleterious effects of sodium selenite toxicity were restored with the simultaneous treatment with C-PC.The results suggest that an administration of 200 mg/kg body weight of C-PC has the ability to prevent/alter the secondary changes reflected in the serum biochemical and histological modifications in rats exposed to sodium selenite.These results complement the beneficial role of C-PC of cyanobacterial origin as a efficacious anti-cataractogenic agent against sodium selenite toxicity. 展开更多
关键词 CYANOBACTERIA C-PHYCOCYANIN CATARACT sodium selenite CATARACTOGENESIS
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Sodium selenite may be not the optimal speciation as an effective therapy for arsenic-induced anxiety-/depression-like behavior
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作者 Xiao-Hua Ren Xiao-Xuan Wang Lian-Ping He 《World Journal of Psychiatry》 SCIE 2022年第9期1255-1257,共3页
Major depressive disorder is a serious and prevalent neuropsychiatric disorder,affecting more than 350 million people worldwide.Here,sodium selenite(SS)was selected as the selenite supplement to improve the behavior i... Major depressive disorder is a serious and prevalent neuropsychiatric disorder,affecting more than 350 million people worldwide.Here,sodium selenite(SS)was selected as the selenite supplement to improve the behavior in a mouse model of depression induced by As.SS may be not the optimal speciation for selenite supplementation and the source of the SS used in the study was not disclosed.There are many mouse models of depression and anxiety;however,in the current study,a classical mouse model of depression was not used.Thus,several questions still need to be further discussed.Taken together,the results indicate that SS may be not the optimal speciation as an effective therapy for As-induced anxiety-/depression-like behavior. 展开更多
关键词 DEPRESSION ARSENIC Major depressive disorder sodium selenite Optimal speciation
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Effect of Sodium Selenite-Chitosan Compound Preservative on Storability of Kumquats
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作者 Dongdi XIE Jun YUE Yankun LU 《Asian Agricultural Research》 2021年第4期43-47,共5页
[Objectives]To explore the effect of sodium selenite-chitosan compound preservative on storability of kumquats.[Methods]Under the condition of room temperature,fresh kumquats were coated with different concentrations ... [Objectives]To explore the effect of sodium selenite-chitosan compound preservative on storability of kumquats.[Methods]Under the condition of room temperature,fresh kumquats were coated with different concentrations of sodium selenite-chitosan compound preservative,respectively.[Results]Sodium selenite-chitosan compound preservative reduced the weight loss rate,delayed the decline of vitamin C,soluble solids,titratable acid and GSH contents,slowed down the accumulation of MDA,inhibited the increase of PPO activity,and increased to a certain extent the activity of SOD in fresh kumquats.[Conclusions]Sodium selenite-chitosan compound preservative maintained the quality and prolonged the shelf life of kumquats.The preservation effect of compound preservative composed of 4 mg/L sodium selenite and 8 g/L chitosan was the best. 展开更多
关键词 KUMQUAT sodium selenite CHITOSAN Storage quality
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Hydrogen selenide,a vital metabolite of sodium selenite,uncouples the sulfilimine bond and promotes the reversal of liver fibrosis 被引量:1
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作者 Dongrui Luan Zengteng Zhao +4 位作者 Dandan Xia Qiuling Zheng Xiaonan Gao Kehua Xu Bo Tang 《Science China(Life Sciences)》 SCIE CAS CSCD 2021年第3期443-451,共9页
Sodium selenite has alleviating effects on liver fibrosis;however,its therapeutic molecular mechanism remains unclear.Herein,hydrogen selenide,a major metabolite of Na_(2)SeO_(3),was tested to uncouple the sulfilimine... Sodium selenite has alleviating effects on liver fibrosis;however,its therapeutic molecular mechanism remains unclear.Herein,hydrogen selenide,a major metabolite of Na_(2)SeO_(3),was tested to uncouple the sulfilimine bond in collagen IV,the biomarker of liver fibrosis.A mouse model of liver fibrosis was constructed via a CCl_(4)-induced method,followed by the administration of 0.2 mg kg−1 Na_(2)SeO_(3)via gavage three times per week for 4 weeks.Changes in H2Se,NADPH,and H_(2)O_(2)levels were monitored in real time by using NIR-H2Se,DCI-MQ-NADPH,and H_(2)O_(2)probes in vivo,respectively.H_(2)Se continuously accumulated in the liver throughout the Na_(2)SeO_(3)treatment period,but the levels of NADPH and H_(2)O_(2)decreased.The expression of collagen IV was analyzed through Western blot and liquid chromatography-mass spectrometry.Results confirmed that the sulfilimine bond of collagen IV in the fibrotic mouse livers could be broken by H2Se with the Na_(2)SeO_(3)treatment.Therefore,the therapeutic effect of Na_(2)SeO_(3)on liver fibrosis could be mainly attributed to H_(2)Se that uncoupled the sulfilimine bond to induce collagen IV degradation.This study provided a reasonable explanation for the molecular mechanism of the in vivo function of Na_(2)SeO_(3)and the prevention of liver fibrosis by administering inorganic selenium. 展开更多
关键词 hydrogen selenide sodium selenite sulfilimine bond liver fibrosis reversal collagen IV
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Mechanistic research:Selenium regulates virulence factors,reducing adhesion ability and inflammatory damage of Helicobacter pylori
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作者 Chun Qin Gan-Rong Huang +6 位作者 Ai-Xing Guan Wen-Ting Zhou Hao Chen Pei-Pei Luo Xian-Ke Luo Yan-Qiang Huang Zan-Song Huang 《World Journal of Gastroenterology》 SCIE CAS 2024年第1期91-107,共17页
BACKGROUND The pathogenicity of Helicobacter pylori is dependent on factors including the environment and the host.Although selenium is closely related to pathogenicity as an environmental factor,the specific correlat... BACKGROUND The pathogenicity of Helicobacter pylori is dependent on factors including the environment and the host.Although selenium is closely related to pathogenicity as an environmental factor,the specific correlation between them remains unclear.AIM To investigate how selenium acts on virulence factors and reduces their toxicity.METHODS H.pylori strains were induced by sodium selenite.The expression of cytotoxin-associated protein A(CagA)and vacuolating cytotoxin gene A(VacA)was determined by quantitative PCR and Western blotting.Transcriptomics was used to analyze CagA,CagM,CagE,Cag1,Cag3,and CagT.C57BL/6A mice were infected with the attenuated strains subjected to sodium selenite induction,and H.pylori colonization,inflammatory reactions,and the cell adhesion ability of H.pylori were assessed.RESULTS CagA and VacA expression was upregulated at first and then downregulated in the H.pylori strains after sodium selenite treatment.Their expression was significantly and steadily downregulated after the 5th cycle(10 d).Transcriptome analysis revealed that sodium selenite altered the levels affect H.pylori virulence factors such as CagA,CagM,CagE,Cag1,Cag3,and CagT.Of these factors,CagM and CagE expression was continuously downregulated and further downregulated after 2 h of induction with sodium selenite.Moreover,CagT expression was upregulated before the 3rd cycle(6 d)and significantly downregulated after the 5th cycle.Cag1 and Cag3 expression was upregulated and downregulated,respectively,but no significant change was observed by the 5th cycle.C57BL/6A mice were infected with the attenuated strains subjected to sodium selenite induction.The extent of H.pylori colonization in the stomach increased;however,sodium selenite also induced a mild inflammatory reaction in the gastric mucosa of H.pylori-infected mice,and the cell adhesion ability of H.pylori was significantly weakened.CONCLUSION These results demonstrate that H.pylori displayed virulence attenuation after the 10th d of sodium selenite treatment.Sodium selenite is a low toxicity compound with strong stability that can reduce the cell adhesion ability of H.pylori,thus mitigating the inflammatory damage to the gastric mucosa. 展开更多
关键词 Helicobacter pylori sodium selenite Virulence factors ADHERENCE Inflammation
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Relationship between reactive oxygen species and sodium-selenite-induced DNA damage in HepG2 cells
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作者 ZOU Yunfeng NIU Piye +4 位作者 GONG Zhiyong YANG Jin YUAN Jing WU Tangchun CHEN Xuemin 《Frontiers of Medicine》 SCIE CSCD 2007年第3期327-332,共6页
Selenium compounds,as an effective chemopreventive agent,can induce apoptosis in tumor cells.Reactive oxygen species(ROS)are important mediators in apoptosis induced by various stimuli,which include chemopreventive ag... Selenium compounds,as an effective chemopreventive agent,can induce apoptosis in tumor cells.Reactive oxygen species(ROS)are important mediators in apoptosis induced by various stimuli,which include chemopreventive agents.In this study,we investigated the relationship between ROS and the levels of DNA damage induced by selenite in HepG2 cells.After HepG2 cells were treated with selenite,there was a dose-dependent decrease in cell viability.The levels of ROS induced by selenite were measured by 2p,7p-dichlorofluorescein diacetate(DCFH-DA)fluorescence,which shows a dose-and time-dependent increase in HepG2 cells.The levels of DNA damage in HepG2 increased in all cells treated with an increasing dose of selenite at 0,2.5,5,10,and 20μmol/L.N-acetylcysteine(NAC),a known antioxidant,increased cell viability and decreased ROS generation.Moreover,NAC effectively blocked DNA damage induced by selenite.These results revealed that ROS might play an important role in selenite-induced DNA damage that can be reduced by NAC treatment. 展开更多
关键词 cell survival DNA damage HepG2 cells reactive oxygen species sodium selenite
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Mycelial Growth of Pleurotus Spp in Se-Enriched Culture Media
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作者 Marliane de Cássia Soares da Silva Mateus Dias Nunes +1 位作者 Jose Maria Rodrigues da Luz Maria Catarina Megumi Kasuya 《Advances in Microbiology》 2013年第8期11-18,共8页
Selenium (Se) is an essential element to human. However, this element can be in low content in soil of some regions. Se deficiency may cause Keshan disease, thyroid dysfunction and osteoarthritis. The Se-enriched cere... Selenium (Se) is an essential element to human. However, this element can be in low content in soil of some regions. Se deficiency may cause Keshan disease, thyroid dysfunction and osteoarthritis. The Se-enriched cereals are an interesting way to prevent these diseases. But, recent studies have shown that Se-enriched mushrooms are a better Se source. This occurs due to the high capacity of the fungi to absorb and transform the inorganic Se to organic forms, which are more bioavailable. Pleurotus ostreatus and Pleurotus eryngii are mushrooms species worldwide consumed and able to Se bioaccumulate. However, depending on the level of this element, it can be toxic for the fungus. Here we showed that the presence of the Se in culture medium decreases fungal growth rate, hyphae diameter and septum distance and causes alteration in color of colony. A garlic strong smell was directly proportional to Se level. P. eryngii was more tolerant to Se than P. ostreatus. So, it is important to screen this element level for Se-enriched mushroom production. 展开更多
关键词 MUSHROOMS Colony Morphology FOOD sodium selenite Hyphae Diameter
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Effect of different forms of selenium in osteoporosis rat model induced by retinoic acid
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作者 黎海涛 郭燕 +2 位作者 陈晓燕 满正印 张小涛 《Food Quality and Safety》 SCIE CSCD 2023年第2期360-369,共10页
Osteoporosis is a typical physiological disease,the main symptoms of which are brittle fracture,bone pain and easily deformed.As an individual ages,the prevalence of osteoporosis increases year by year.In the present ... Osteoporosis is a typical physiological disease,the main symptoms of which are brittle fracture,bone pain and easily deformed.As an individual ages,the prevalence of osteoporosis increases year by year.In the present study,selenium with antioxidant,immunomodulatory and anti-tumor effects was used to prevent osteoporosis induced by retinoic acid.The serum calcium contents in the selenium-treated groups(sodium selenite and selenomethionine)were significantly higher(P<0.05)than those in the model group in both the prevention and treatment studies.After pre-vention,glutamic-oxalacetic transaminase transaminase(GOT),glutamate transaminase(GPT),alkaline phosphatase(ALP)and tartrate-resistant acid phosphatase(TRACP)levels were significantly(P<0.05)decreased.In the treatment study,the serum calcium and phosphorus contents of the rats increased after selenium treatment.There was no significant change(P>0.05)in the activity of GOT and GPT.The content of ALP decreased obviously and the TRACP enzyme activity increased.Overall,these results showed that different forms of selenium compounds have great potential in preventing and treating osteoporosis. 展开更多
关键词 Retinoic acid-induced osteoporosis rat model sodium selenite SELENOMETHIONINE PREVENTION TREATMENT
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