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Iraji A, Fu Z, Faghiri A, Duda M, Chen J, Rachakonda S, DeRamus T, Kochunov P, Adhikari BM, Belger A, Ford JM, Mathalon DH, Pearlson GD, Potkin SG, Preda A, Turner JA, van Erp TGM, Bustillo JR, Yang K, Ishizuka K, Faria A, Sawa A, Hutchison K, Osuch EA, Theberge J, Abbott C, Mueller BA, Zhi D, Zhuo C, Liu S, Xu Y, Salman M, Liu J, Du Y, Sui J, Adali T, Calhoun VD. Identifying canonical and replicable multi-scale intrinsic connectivity networks in 100k+ resting-state fMRI datasets. Hum Brain Mapp 2023; 44:5729-5748. [PMID: 37787573 PMCID: PMC10619392 DOI: 10.1002/hbm.26472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 04/30/2023] [Accepted: 06/19/2023] [Indexed: 10/04/2023] Open
Abstract
Despite the known benefits of data-driven approaches, the lack of approaches for identifying functional neuroimaging patterns that capture both individual variations and inter-subject correspondence limits the clinical utility of rsfMRI and its application to single-subject analyses. Here, using rsfMRI data from over 100k individuals across private and public datasets, we identify replicable multi-spatial-scale canonical intrinsic connectivity network (ICN) templates via the use of multi-model-order independent component analysis (ICA). We also study the feasibility of estimating subject-specific ICNs via spatially constrained ICA. The results show that the subject-level ICN estimations vary as a function of the ICN itself, the data length, and the spatial resolution. In general, large-scale ICNs require less data to achieve specific levels of (within- and between-subject) spatial similarity with their templates. Importantly, increasing data length can reduce an ICN's subject-level specificity, suggesting longer scans may not always be desirable. We also find a positive linear relationship between data length and spatial smoothness (possibly due to averaging over intrinsic dynamics), suggesting studies examining optimized data length should consider spatial smoothness. Finally, consistency in spatial similarity between ICNs estimated using the full data and subsets across different data lengths suggests lower within-subject spatial similarity in shorter data is not wholly defined by lower reliability in ICN estimates, but may be an indication of meaningful brain dynamics which average out as data length increases.
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Affiliation(s)
- A. Iraji
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
- Department of Computer ScienceGeorgia State UniversityAtlantaGeorgiaUSA
| | - Z. Fu
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
| | - A. Faghiri
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
| | - M. Duda
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
| | - J. Chen
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
| | - S. Rachakonda
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
| | - T. DeRamus
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
| | - P. Kochunov
- Maryland Psychiatric Research Center, Department of Psychiatry, School of MedicineUniversity of MarylandBaltimoreMarylandUSA
| | - B. M. Adhikari
- Maryland Psychiatric Research Center, Department of Psychiatry, School of MedicineUniversity of MarylandBaltimoreMarylandUSA
| | - A. Belger
- Department of PsychiatryUniversity of North CarolinaChapel HillNorth CarolinaUSA
| | - J. M. Ford
- Department of PsychiatryUniversity of California San FranciscoSan FranciscoCaliforniaUSA
- San Francisco VA Medical CenterSan FranciscoCaliforniaUSA
| | - D. H. Mathalon
- Department of PsychiatryUniversity of California San FranciscoSan FranciscoCaliforniaUSA
- San Francisco VA Medical CenterSan FranciscoCaliforniaUSA
| | - G. D. Pearlson
- Departments of Psychiatry and Neuroscience, School of MedicineYale UniversityNew HavenConnecticutUSA
| | - S. G. Potkin
- Department of Psychiatry and Human BehaviorUniversity of California IrvineIrvineCaliforniaUSA
| | - A. Preda
- Department of Psychiatry and Human BehaviorUniversity of California IrvineIrvineCaliforniaUSA
| | - J. A. Turner
- Department of Psychiatry and Behavioral HealthOhio State University Medical Center in ColumbusColumbusOhioUSA
| | - T. G. M. van Erp
- Clinical Translational Neuroscience Laboratory, Department of Psychiatry and Human BehaviorUniversity of California IrvineIrvineCaliforniaUSA
| | - J. R. Bustillo
- Department of Psychiatry and Behavioral SciencesUniversity of New MexicoAlbuquerqueNew MexicoUSA
| | - K. Yang
- Department of Psychiatry, School of MedicineJohns Hopkins UniversityBaltimoreMarylandUSA
| | - K. Ishizuka
- Department of Psychiatry, School of MedicineJohns Hopkins UniversityBaltimoreMarylandUSA
| | - A. Faria
- Department of Psychiatry, School of MedicineJohns Hopkins UniversityBaltimoreMarylandUSA
| | - A. Sawa
- Departments of Psychiatry, Neuroscience, Biomedical Engineering, Pharmacology, and Genetic MedicineJohns Hopkins University School of MedicineBaltimoreMarylandUSA
- Department of Mental HealthJohns Hopkins University Bloomberg School of Public HealthBaltimoreMarylandUSA
| | - K. Hutchison
- Department of PsychologyUniversity of ColoradoBoulderColoradoUSA
| | - E. A. Osuch
- Department of Psychiatry, Schulich School of Medicine and DentistryLondon Health Sciences Centre, Lawson Health Research InstituteLondonCanada
| | - J. Theberge
- Department of Psychiatry, Schulich School of Medicine and DentistryLondon Health Sciences Centre, Lawson Health Research InstituteLondonCanada
| | - C. Abbott
- Department of Psychiatry (CCA)University of New MexicoAlbuquerqueNew MexicoUSA
| | - B. A. Mueller
- Department of PsychiatryUniversity of MinnesotaMinneapolisMinnesotaUSA
| | - D. Zhi
- The State Key Lab of Cognitive Neuroscience and LearningBeijing Normal UniversityBeijingChina
| | - C. Zhuo
- Tianjin Mental Health CenterNankai University Affiliated Anding HospitalTianjinChina
| | - S. Liu
- The Department of PsychiatryFirst Clinical Medical College/First Hospital of Shanxi Medical UniversityTaiyuanChina
| | - Y. Xu
- The Department of PsychiatryFirst Clinical Medical College/First Hospital of Shanxi Medical UniversityTaiyuanChina
| | - M. Salman
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
- School of Electrical & Computer EngineeringGeorgia Institute of TechnologyAtlantaGeorgiaUSA
| | - J. Liu
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
- Department of Computer ScienceGeorgia State UniversityAtlantaGeorgiaUSA
| | - Y. Du
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
- School of Computer and Information TechnologyShanxi UniversityTaiyuanChina
| | - J. Sui
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
- The State Key Lab of Cognitive Neuroscience and LearningBeijing Normal UniversityBeijingChina
| | - T. Adali
- Department of CSEEUniversity of Maryland Baltimore CountyBaltimoreMarylandUSA
| | - V. D. Calhoun
- Tri‐Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State UniversityGeorgia Institute of Technology, and Emory UniversityAtlantaGeorgiaUSA
- Department of Computer ScienceGeorgia State UniversityAtlantaGeorgiaUSA
- Department of Psychiatry, School of MedicineJohns Hopkins UniversityBaltimoreMarylandUSA
- School of Electrical & Computer EngineeringGeorgia Institute of TechnologyAtlantaGeorgiaUSA
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Ma W, Wang L, Tan X, Wang X, Yang C, Wang Y, Liu Z, Liu B, Zhu H, Zhi D, Wang D. A novel RRGW derived peptide is a promising inhibitor of BoNT/A. J Enzyme Inhib Med Chem 2023; 38:2203878. [PMID: 37106479 PMCID: PMC10150623 DOI: 10.1080/14756366.2023.2203878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
Abstract
Clostridium botulinum neurotoxin type A (BoNT/A) is one of the most potent biotoxins ever known. Its entry into neurons could block vesicle exocytosis to abolish the release of neurotransmitters from nerve terminals, thus leading to muscle paralysis. Although there are so many peptides, antibodies and chemical compounds claimed to have anti-toxin activity, no drug is available in the clinical application except equine antitoxin serum. In the present work, a short peptide inhibitor RRGW of BoNT/A was firstly identified by computer-aided ligand-receptor binding simulation, then an RRGW derived peptide was rational designed based on the fragment of SNAP-25 (141-206 aa). Proteolytic assay showed that the anti-toxin activity of the RRGW derived peptide was much higher than that of RRGW. Digit abduction score assay demonstrated that the derived peptide delayed BoNT/A-induced muscle paralysis at a lower concentration by 20-fold than RRGW. The results supported that RRGW derived peptide can be a potential BoNT/A inhibitor candidate for further treating botulism.
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Affiliation(s)
- Wantong Ma
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Lulu Wang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Xiangmin Tan
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Xin Wang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Chunyan Yang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Yu Wang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Ziye Liu
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Bo Liu
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Hai Zhu
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Dejuan Zhi
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
- Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou, P.R. China
| | - Dongsheng Wang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
- Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou, P.R. China
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou, P.R. China
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Zhi D, Xu S, Ling Z, Li Y, Zhu H, Zhao C, Wang D. Shenqi formula delayed Alzheimer's disease-like symptoms by skn-1 pathway in Caernorhabditis elegans. J Ethnopharmacol 2023:116741. [PMID: 37290734 DOI: 10.1016/j.jep.2023.116741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 06/04/2023] [Accepted: 06/05/2023] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Shenqi formula is composed of Codonopsis pilosula (Cp) and Lycium barbarum (Lb), and it is traditionally used for promoting qi and nourishing the spleen, liver and kidney. Cp and Lb have been reported to improve cognitive performance in APP/PS1 mice, prevent the accumulation of Aβ, and reduce the neurotoxicity of Aβ to achieve the anti-Alzheimer's disease (AD) effect. AIM OF THE STUDY Shenqi formula was explored the therapeutic effect on Caenorhabditis elegans AD pathological model and the underlying mechanism of action. MATERIALS AND METHODS Paralysis assay and serotonin sensitivity assay was used to detect whether Shenqi formula can alleviate AD paralysis phenotype, and then DPPH, ABTS, NBT and Fenton methods were applied to investigate the scavenging capacity to free radical, ROS, ·O2- and ·OH of Shenqi formula in vitro. H2DCF-DA and MitoSOX™ Red were employed to measure ROS and .O2- accumulation, respectively. RNAi was used to knock down the expression of skn-1 and daf-16 related to oxidative stress resistance signalling pathway. Fluorescence microscopy was used to record the expression of SOD-3:GFP, GST-4:GFP, SOD-1:YFP, and the nuclear translocation of SKN-1 and DAF-16. Western blot assay was carried out to test Aβ monomers and oligomers. RESULTS Shenqi formula delayed the AD-like pathological characteristics in C. elegans, and the complete Shenqi formula was more effective than Cp or Lb alone. The effect of Shenqi formula on delaying worm paralysis was partially eliminated by skn-1 RNAi, but not daf-16 RNAi. Shenqi formula significantly inhibited the abnormal deposition of Aβ protein, decreased Aβ protein monomers and oligomers. It increased the expressions of gst-4, sod-1, and sod-3 similar to paraquat, companied by rise then fall of ROS and .O2- in AD worms. CONCLUSIONS Shenqi formula at least partially depended on SKN-1 signalling pathway to exert its anti-AD effect, and it is potential to be used as a kind of health food to prevent the progress of AD.
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Affiliation(s)
- Dejuan Zhi
- School of Pharmacy, Lanzhou University, No.199 Donggang West Road, Lanzhou, Gansu, 730000, China; Frontiers Science Center for Rare Isotopes, No.222 Tianshui South Road, Lanzhou, Gansu, 730000, China.
| | - Shuaishuai Xu
- School of Pharmacy, Lanzhou University, No.199 Donggang West Road, Lanzhou, Gansu, 730000, China.
| | - Zhang Ling
- School of Pharmacy, Lanzhou University, No.199 Donggang West Road, Lanzhou, Gansu, 730000, China.
| | - Yuxuan Li
- School of Pharmacy, Lanzhou University, No.199 Donggang West Road, Lanzhou, Gansu, 730000, China.
| | - Hai Zhu
- School of Pharmacy, Lanzhou University, No.199 Donggang West Road, Lanzhou, Gansu, 730000, China.
| | - Chengmu Zhao
- School of Pharmacy, Lanzhou University, No.199 Donggang West Road, Lanzhou, Gansu, 730000, China.
| | - Dongsheng Wang
- School of Pharmacy, Lanzhou University, No.199 Donggang West Road, Lanzhou, Gansu, 730000, China; Frontiers Science Center for Rare Isotopes, No.222 Tianshui South Road, Lanzhou, Gansu, 730000, China.
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Zhi D, Zhao C, Dong J, Ma W, Xu S, Yue J, Wang D. cep-1 mediated the mitohormesis effect of Shengmai formula in regulating Caenorhabditis elegans lifespan. Biomed Pharmacother 2022; 152:113246. [PMID: 35687906 DOI: 10.1016/j.biopha.2022.113246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/31/2022] [Accepted: 06/02/2022] [Indexed: 11/02/2022] Open
Abstract
Ageing is one of the major causes of many diseases such as cardiovascular diseases, diabetes, neurodegenerative disorders, and cancer. It has been found that mitochondrion acts as a crucial regulator of healthy lifespan. In this work, traditional Chinese medicine Shengmai formula (SMH) was used to treat mitochondrial mutants of Caenorhabditis elegans. The results showed that SMH shortened the lifespan of short-lived mev-1 mutant, but lengthened the lifespan of long-lived isp-1 mutant. Acute SMH treatment has benefit effect by increasing resistance capacity and motion activity in both ETC mutants and wild type N2. Compared with N2, the genome-wide transcriptome profile of ETC mutants showed on a similar pattern after SMH treatment. GO and KEGG enrichment analysis addressed that SMH-induced genes mainly enriched in metabolic process and oxidation-reduction process. The ROS levels in ETC mutants and N2 firstly rose then fell after SMH treatment, in company with the elevation of SOD-1, SOD-3 and GST-4, the increment of HSP-16.2 combined with heat shock. SMH increased oxygen consumption and ATP content, improved the restoration of mitochondrial homeostasis. SMH-induced opposed lifespan outcomes were markedly counteracted by cep-1 RNAi, together with the mitochondrial dynamics. Western blot assay also demonstrated a SMH-induced CEP-1 expression. Collectively, SMH acts as a prooxidant to regulate mitochondrial homeostasis and causes mitohormesis to exert therapeutic effect based on the redox background of the recipients, and cep-1 was required for the mitochondrial hormetic responses. The results shed a light on the rational clinical anti-ageing applications of SMH in the future.
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Affiliation(s)
- Dejuan Zhi
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Chengmu Zhao
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Juan Dong
- Qinghai University Affiliated Hospital, Tongren Road No. 29th, Chengxi District, Xining, Qinghai, PR China
| | - Wenjuan Ma
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Shuaishuai Xu
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Juan Yue
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Dongsheng Wang
- School of Pharmacy, Lanzhou University, Lanzhou, PR China.
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Wang N, Wang E, Wang R, Muhammad F, Li T, Yue J, Zhou Y, Zhi D, Li H. Ursolic acid ameliorates amyloid β-induced pathological symptoms in Caenorhabditis elegans by activating the proteasome. Neurotoxicology 2022; 88:231-240. [PMID: 34902447 DOI: 10.1016/j.neuro.2021.12.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 11/07/2021] [Accepted: 12/08/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Amyloid β induces pathological symptoms in various neurodegenerative disorders. It is the hallmark of these neurodegenerative disorders, such as Alzheimer's disease, and is reported to induce neurotoxicity leading to neuronal impairment. The continuous development of neurodegenerative disease accompanies pathological changes in amyloid β deposition in the brain. After amyloid β accumulates, the inadequate clearance of amyloid β further accelerates the development of events in the pathological cascade. In eukaryotes, the proteasome is responsible for the degradation of misfolded and damaged proteins to maintain proteostasis. Therefore, screening candidates that preserve proteasomal activity may promote amyloid β homeostasis, which is expected to provide new therapeutic opportunities for these neurodegenerative diseases. Ursolic acid, a natural triterpenoid, has prominent pharmacological antioxidant, anti-inflammatory, neuroprotective, and nontoxic activities. Here, we explored the protective effects of ursolic acid on amyloid β-induced pathological symptoms. METHODS This study investigated the therapeutic potential of ursolic acid and its underlying molecular mechanisms using a Caenorhabditis elegans transgenic pathological model. RESULTS In our study, ursolic acid successfully repressed amyloid β-induced paralysis and hypersensitivity to serotonin in Caenorhabditis elegans. The levels of amyloid β monomers, oligomers, and deposits were decreased after treatment with ursolic acid in transgenic nematodes overexpressing human amyloid β; however, ursolic acid did not affect exogenous transgene transcription and expression levels. Ursolic acid transcriptionally enhanced the ubiquitin-proteasome system and augmented proteasome activity in vivo. However, the proteasome inhibitor MG132 abolished the therapeutic effect of ursolic acid on behavioral paralysis, and Parkinson's disease-related-1 was required for the therapeutic effect of ursolic acid. CONCLUSIONS Our study revealed that ursolic acid prevented amyloid β-induced proteotoxic stress, specifically by reducing the amount of amyloid β and increasing proteasome activity in vivo. Furthermore, the therapeutic effect of ursolic acid on transgenic nematodes expressing amyloid β depended on the increased activity of the proteasome. This work provides an essential supplement to the information on the pharmacological mechanism of ursolic acid.
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Affiliation(s)
- Ningbo Wang
- School of Life Sciences, Lanzhou University, China
| | - Enhui Wang
- School of Life Sciences, Lanzhou University, China
| | - Ruyue Wang
- School of Life Sciences, Lanzhou University, China
| | | | - Ting Li
- School of Life Sciences, Lanzhou University, China
| | - Juan Yue
- School of Pharmacy, Lanzhou University, China
| | - Yongtao Zhou
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China; Clinical Center for Parkinson's Disease, Capital Medical University, Beijing, China
| | - Dejuan Zhi
- School of Pharmacy, Lanzhou University, China.
| | - Hongyu Li
- School of Life Sciences, Lanzhou University, China; School of Pharmacy, Lanzhou University, China.
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Zhi D, Yang W, Yue J, Xu S, Ma W, Zhao C, Wang X, Wang D. HSF-1 mediated combined ginsenosides ameliorating Alzheimer's disease like symptoms in Caernorhabditis elegans. Nutr Neurosci 2021; 25:2136-2148. [PMID: 34263695 DOI: 10.1080/1028415x.2021.1949791] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
There are few effective medications to treat Alzheimer's disease (AD). It has been suggested that several ginsenosides possess mild or moderate anti-AD activity. In our present work, a preferred combined ginsenosides was shown to have a more significant benefit effect on AD-like symptoms of worm paralysis and hypersensitivity to exogenous 5-HT in C. elegans. The combined ginsenosides can suppress Aβ deposits and Aβ oligomers, alleviating the toxicity induced by Aβ overexpression more effectively than used alone. Its anti-AD effect was partially abolished by hsf-1 RNAi knocked down or hsf-1 inactivation by point mutation, but not by daf-16 or skn-1 RNAi knocked down. Furthermore, it markedly activated hsp-16.2 gene expression downstream of HSF-1. Our results demonstrated that HSF-1 signaling pathway exerts an important role in mediating the therapeutic effect of combined ginsenosides on AD worms. These results provided powerful evidences and theoretical foundation for reshaping medicinal products of ginsenosides and ginseng on prevention of neurodegenerative diseases.
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Affiliation(s)
- Dejuan Zhi
- School of Pharmacy, Lanzhou University, Lanzhou, People's Republic of China
| | - Wenqi Yang
- School of Pharmacy, Lanzhou University, Lanzhou, People's Republic of China
| | - Juan Yue
- School of Pharmacy, Lanzhou University, Lanzhou, People's Republic of China
| | - Shuaishuai Xu
- School of Pharmacy, Lanzhou University, Lanzhou, People's Republic of China
| | - Wenjuan Ma
- School of Pharmacy, Lanzhou University, Lanzhou, People's Republic of China
| | - Chengmu Zhao
- School of Pharmacy, Lanzhou University, Lanzhou, People's Republic of China
| | - Xin Wang
- School of Pharmacy, Lanzhou University, Lanzhou, People's Republic of China
| | - Dongsheng Wang
- School of Pharmacy, Lanzhou University, Lanzhou, People's Republic of China
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Liang Y, Li S, Song X, Zhou D, Zhi D, Hao B, Liu Y, Liang J, Wang Z. Swainsonine producing performance of Alternaria oxytropis was improved by heavy-ion mutagenesis technology. FEMS Microbiol Lett 2021; 368:6263639. [PMID: 33942869 DOI: 10.1093/femsle/fnab047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 04/30/2021] [Indexed: 11/13/2022] Open
Abstract
Swainsonine, an indolizidine alkaloid, is a promising anti-tumorigenic compound. Biological production of swainsonine was prospective, but the low swainsonine yield of wild type Alternaria oxytropis limited its production on a large scale. In present work, a stable A. oxytropis mutant UO1 with swanisonine yield of 14.84% higher than the wild-type strain was successfully obtained after heavy-ion irradiation. The A. oxytropis mutant UO1 and original wild-type strain were futher evaluated for SW concentrations under different factors. Results showed that the optimum culture temperature was 25°C. The optimum initial medium pH was 6.5 and the optimum inoculum size was 2 mL per 200 mL. Addition of the biosynthetic precursor L-pipecolic acids and L-lysine appropriately could increase the SW synthesis. These findings provided a theoretical basis and scientific data for the industrial production of swainsonine.
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Affiliation(s)
- Yan Liang
- School of Pharmacy, Lanzhou University, West Donggang Road No. 199, Lanzhou 730000, PR China
| | - Shangwei Li
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou 730050, PR China
| | - Xiangdong Song
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou 730050, PR China
| | - Deshun Zhou
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou 730050, PR China
| | - Dejuan Zhi
- School of Pharmacy, Lanzhou University, West Donggang Road No. 199, Lanzhou 730000, PR China
| | - Baocheng Hao
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou 730050, PR China
| | - Yu Liu
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou 730050, PR China
| | - Jianping Liang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou 730050, PR China
| | - Zhen Wang
- School of Pharmacy, Lanzhou University, West Donggang Road No. 199, Lanzhou 730000, PR China
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Ma W, Yue J, Liang S, Gao M, Wang X, Cui N, Li H, Zhi D. Realgar increases defenses against infection by Enterococcus faecalis in Caenorhabditis elegans. J Ethnopharmacol 2021; 268:113559. [PMID: 33159994 DOI: 10.1016/j.jep.2020.113559] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 11/01/2020] [Accepted: 11/02/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Realgar has been used in traditional remedies for a long history in China and India. It is clinically used to treat diverse cancers, especially acute promyelocytic leukemia (APL), chronic myelogenous leukemia (CML) in China. However, paradoxic roles of realgar to increase or decrease immunity are reported. It is urgent to address this question, due to immune depression can be strongly benefit to cancer development, but detrimental to patients. AIM OF THE STUDY This present work is to explore whether realgar promote or suppress immune responses, and shed light on its mode of action. Our results should provide cues for rational strategy to explore realgar for clinical use. MATERIAL AND METHODS Infection model in vivo was established by using Enterococcus faecalis to attack Caenorhabditis elegans, then realgar was used to treat the infected worms to investigate its effects on infectivity and the underlying mechanism. Killing analysis was carried out to test whether realgar can mitigate worm infection. Thermotolerance resistance analysis was used to evaluate if realgar functions hormetic effect. Quantification of live E. faecalis in nematode intestine was employed to ascertain if realgar alleviate the bacterial load in worm gut. Quantitative real-time PCR (qRT-PCR) was used to test the expression of antibacterial effectors. Western blot was used to test the effect of realgar on the expressions of p38 and phospho-p38 in worms infected by E. faecalis. RESULTS Realgar alleviated the infected worms in strains of N2, glp-4, and daf-2, but failed in sek-1, glp-4; sek-1, and daf-2; daf-16 when p38 MAPK or daf-16 was blocked or inactivated. Western blot assay demonstrated that realgar increased the expression of phosph-p38. Thermotolerance assay showed that realgar played a hormetic role on nemtodes, triggered protective response and reduced bacterial load after realgar treatment for 120 h qRT-PCR demonstrated that realgar significantly increased antibacterial effectors, thus leading to pathogen elimination. CONCLUSION Realgar increased defenses against E. faecalis in C. elegans by inducing both immune responses and protective responses. It was regulated by p38 MAPK pathway and DAF-16.
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Affiliation(s)
- Wenjuan Ma
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Juan Yue
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Shu Liang
- Gansu Provincial Centre for Disease Control and Prevention, Lanzhou University, Lanzhou, PR China
| | - Meng Gao
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Xin Wang
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Na Cui
- School of Pharmacy, Lanzhou University, Lanzhou, PR China
| | - Hongyu Li
- School of Pharmacy, Lanzhou University, Lanzhou, PR China.
| | - Dejuan Zhi
- School of Pharmacy, Lanzhou University, Lanzhou, PR China.
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9
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Wang N, Zhou Y, Zhao L, Wang C, Ma W, Ge G, Wang Y, Ullah I, Muhammad F, Alwayli D, Zhi D, Li H. Ferulic acid delayed amyloid β-induced pathological symptoms by autophagy pathway via a fasting-like effect in Caenorhabditis elegans. Food Chem Toxicol 2020; 146:111808. [PMID: 33045309 DOI: 10.1016/j.fct.2020.111808] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/27/2020] [Accepted: 10/06/2020] [Indexed: 12/19/2022]
Abstract
The amyloid β (Aβ) generation or aggregation plays a crucial role in Alzheimer's disease (AD). Autophagy agonists, which function as the clearance of Aβ, could be the potential drug candidates against AD. In staple food crops, ferulic acid (FA) is an enormously copious and almost ubiquitous phenolic antioxidant. In the present study, FA significantly inhibited Aβ-induced pathological symptoms of paralysis and hypersensitivity to exogenous serotonin, meanwhile restrained Aβ monomers, oligomers, and deposits in AD C. elegans. FA increased the expression of autophagy reporter LGG-1 and enhanced autophagy flux. However, the autophagy inhibitors abolished the restrictive action of FA on the worm paralysis phenotype. According to these results, FA triggered autophagy and ameliorated Aβ-induced pathological symptoms by the autophagy pathway. Moreover, FA activated the HLH-30 transcription factor to nuclear localization, which acts upstream of autophagy in fasted animals, reduced the level of lipids, but affected nor the growth of E. coli OP50, neither animal food intake behavior. These suggest that FA induced a fasting-like effect to activate the autophagy pathway. Additionally, FA ameliorated poly Q aggregations in Huntington's disease worm. Thus, FA could not only affect AD, broadly but also neurodegenerative diseases characterized by misfolded or aggregated proteins.
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Affiliation(s)
- Ningbo Wang
- School of Life Sciences, Lanzhou University, China.
| | - Yongtao Zhou
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China; Clinical Center for Parkinson's Disease, Capital Medical University, Beijing, China.
| | - Longhe Zhao
- School of Pharmacy, Lanzhou University, China.
| | - Caiding Wang
- School of Life Sciences, Lanzhou University, China.
| | - Wuli Ma
- School of Life Sciences, Lanzhou University, China.
| | - Guangfei Ge
- School of Life Sciences, Lanzhou University, China.
| | - Yu Wang
- School of Pharmacy, Lanzhou University, China.
| | - Inam Ullah
- School of Life Sciences, Lanzhou University, China.
| | | | | | - Dejuan Zhi
- School of Pharmacy, Lanzhou University, China.
| | - Hongyu Li
- School of Life Sciences, Lanzhou University, China; School of Pharmacy, Lanzhou University, China.
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10
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Xie Q, Yu L, Wang X, Wu Z, Zhi D, Yang J, Guo Z, Wu T, Sun Y, Zhao L, Ding X, Khan A, Li H. A novel realgar-indigo naturalis formula more effectively induces apoptosis in NB4 cells. Pak J Pharm Sci 2019; 32:957-962. [PMID: 31278706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Realgar as a kind of arsenic agent is currently used to treat APL in China. The effectiveness and low toxicity of realgar have been verified, lower than arsenic trioxide. Although the therapeutic efficacy of realgar is blocked severely by its poor insolubility in water. In our lab, we addressed this problem by obtaining realgar bioleaching solution (RBS) from microbiological leaching technique. To develop a tradition Chinese medicinal formula (TCMF) for clinical application realgar is usually used with other herbs. However, treated realgar with RBS has not been evaluated in TCMF contain realgar. In the present study we used NB4 to investigate the effects of novel Realgar-Indigo naturalis formula (FRBS) on cell proliferation and apoptosis. We used MTT assay to measure anti proliferative activity of FRBS. We further study the effects of FRBS on cell growth and apoptosis according flow cytometry, DNA fragmentation assay and Fluorescence microscopy and Western blot. The results revealed that FRBS significantly inhibited growth in a dose-dependent manner, and induced apoptosis in NB4 cells. NB4 cell inhibitory response to FRBS at 2μg ml-1 of arsenic concentration was twofold higher, dissimilar to RIF, and induced apoptosis more effectively. Further, a higher expression of caspase-3, caspase-9 and cytochrome C from increased from FRBS. RBS can substitute the traditional realgar powder in RIF in order to provide a novel and promising Realgar-Indigo naturalis formula to treat acute promyelocytic leukemia.
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MESH Headings
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/pharmacology
- Apoptosis/drug effects
- Arsenic/administration & dosage
- Arsenic/pharmacology
- Caspase 3/metabolism
- Caspase 9/metabolism
- Cell Line, Tumor
- Cell Proliferation/drug effects
- DNA Fragmentation/drug effects
- Dose-Response Relationship, Drug
- Drugs, Chinese Herbal/administration & dosage
- Drugs, Chinese Herbal/chemistry
- Drugs, Chinese Herbal/pharmacology
- Humans
- Leukemia, Promyelocytic, Acute/drug therapy
- Leukemia, Promyelocytic, Acute/metabolism
- Leukemia, Promyelocytic, Acute/pathology
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Affiliation(s)
- Qinjian Xie
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, PR China / GanSu Corps Hospital of CAPF, Lanzhou, Gansu, PR China
| | - Lan Yu
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - Xin Wang
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - Zhengrong Wu
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - Dejuan Zhi
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - Jing Yang
- Northwest Minzu University, Lanzhou, Gansu, PR China
| | - Zhiwang Guo
- 3Guangdong Corps Hospital of CAPF, Guangzhou, Guangdong, PR China
| | - Tao Wu
- 3Guangdong Corps Hospital of CAPF, Guangzhou, Guangdong, PR China
| | - Yin Sun
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, PR China
| | - Longhe Zhao
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - XiaoYu Ding
- GanSu Corps Hospital of CAPF, Lanzhou, Gansu, PR China
| | - Akbar Khan
- Department Biological Sciences Karakoram International University Gilgit, Pakistan
| | - Hongyu Li
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, PR China / School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
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11
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Zhi D, Dang E, Wang G. 369 Permanent alteration of Abcc6 with in vivo CRISPR-Cas9 genome editing. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Liu Y, Zhi D, Wang X, Fei D, Zhang Z, Wu Z, Li Y, Chen P, Li H. Kushui Rose (R. Setate x R. Rugosa) decoction exerts antitumor effects in C. elegans by downregulating Ras/MAPK pathway and resisting oxidative stress. Int J Mol Med 2018; 42:1411-1417. [PMID: 29956725 PMCID: PMC6089776 DOI: 10.3892/ijmm.2018.3738] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 01/25/2018] [Indexed: 12/31/2022] Open
Abstract
Kushui rose (R. Setate x R. Rugosa) (KR) is a traditional Chinese medicine proven to be a potent antioxidant, and used for thousands of years. Approximately 30% of all human cancers relevant to mutational activated Ras, and over-activated Ras are accompanied by increased accumulation of reactive oxygen species (ROS). Thus, one way of developing anticancer drugs is to reduce ROS accumulation. Therefore, KR was predicted to have potential to combat over-activated Ras-related cancer. C. elegans with let‑60(gf)/ras mutant, which exhibited tumor-like symptoms of the multivulva phenotype, was employed to determine the effect of KR on Ras/MAPK pathway. Other strains of worms and H2DCF-DA dye were also applied to study the antioxidant stress capacity of KR. This study was aimed to determine whether KR has a potential effect on combat over-activated Ras-related cancer through resistance to oxidative stress. Our results showed that Kushui rose decoction (KRD) has potent antioxidant activity in vitro, and can inhibit over-activated Ras in vivo. Further, KRD significantly suppressed over-activated Ras/MAPK pathway by regulating oxidative stress-related proteins, such as forkhead transcription factor (DAF-16), glutathione S-transferase-4 (GST-4), superoxide dismutases (SODs) and heat shock protein-16.2 (HSP-16.2). However, essential oil and hydrosol of KR had no effect on over-activated Ras. Thus these results reminded us that people usually soak rose in hot water to prepare 'rose tea' as an effective way for health care. Thus, KRD was demonstrated to be a potential drug candidate for combating over-activated Ras-related cancer as an antioxidant.
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Affiliation(s)
- Yan Liu
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730020
| | - Dejuan Zhi
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730020
| | - Xin Wang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730020
- Gansu Tianrun Rose Research Institute of Lanzhou University, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Dongqing Fei
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730020
| | - Zhanxin Zhang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730020
| | - Zhengrong Wu
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730020
- Gansu Tianrun Rose Research Institute of Lanzhou University, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Yang Li
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730020
- Gansu Tianrun Rose Research Institute of Lanzhou University, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Peng Chen
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730020
- Gansu Tianrun Rose Research Institute of Lanzhou University, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Hongyu Li
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730020
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13
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Wang X, Chen B, Zhao L, Zhi D, Hai Y, Song P, Li Y, Xie Q, Inam U, Wu Z, Yu L, Li H. Autophagy enhanced antitumor effect in K562 and K562/ADM cells using realgar transforming solution. Biomed Pharmacother 2018; 98:252-264. [PMID: 29272786 DOI: 10.1016/j.biopha.2017.12.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 12/08/2017] [Accepted: 12/13/2017] [Indexed: 01/24/2023] Open
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14
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Zhu S, Li H, Dong J, Yang W, Liu T, Wang Y, Wang X, Wang M, Zhi D. Rose Essential Oil Delayed Alzheimer's Disease-Like Symptoms by SKN-1 Pathway in C. elegans. J Agric Food Chem 2017; 65:8855-8865. [PMID: 28915354 DOI: 10.1021/acs.jafc.7b03224] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
There are no effective medications for delaying the progress of Alzheimer's disease (AD), the most common neurodegenerative disease in the world. In this study, our results with C. elegans showed that rose essential oil (REO) significantly inhibited AD-like symptoms of worm paralysis and hypersensivity to exogenous 5-HT in a dose-dependent manner. Its main components of β-citronellol and geraniol acted less effectively than the oil itself. REO significantly suppressed Aβ deposits and reduced the Aβ oligomers to alleviate the toxicity induced by Aβ overexpression. Additionally, the inhibitory effects of REO on worm paralysis phenotype were abrogated only after skn-1 RNAi but not daf-16 and hsf-1 RNAi. REO markedly activated the expression of gst-4 gene, which further supported SKN-1 signaling pathway was involved in the therapeutic effect of REO on AD C. elegans. Our results provided direct evidence on REO for treating AD on an organism level and relative theoretical foundation for reshaping medicinal products of REO in the future.
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Affiliation(s)
- Shuqian Zhu
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University , Lanzhou, 730000, P.R. China
| | - Hongyu Li
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University , Lanzhou, 730000, P.R. China
| | - Juan Dong
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University , Lanzhou, 730000, P.R. China
| | - Wenqi Yang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University , Lanzhou, 730000, P.R. China
| | - Ting Liu
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University , Lanzhou, 730000, P.R. China
| | - Yu Wang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University , Lanzhou, 730000, P.R. China
| | - Xin Wang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University , Lanzhou, 730000, P.R. China
| | - Meizhu Wang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University , Lanzhou, 730000, P.R. China
| | - Dejuan Zhi
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University , Lanzhou, 730000, P.R. China
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15
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Zhi D, Wang D, Yang W, Duan Z, Zhu S, Dong J, Wang N, Wang N, Fei D, Zhang Z, Wang X, Wang M, Li H. Dianxianning improved amyloid β-induced pathological characteristics partially through DAF-2/DAF-16 insulin like pathway in transgenic C. elegans. Sci Rep 2017; 7:11408. [PMID: 28900141 PMCID: PMC5595840 DOI: 10.1038/s41598-017-11628-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 08/29/2017] [Indexed: 11/09/2022] Open
Abstract
Dianxianning (DXN) is a traditional Chinese formula, and has been approved in China for treating epilepsy since 1996. Here anti-Alzheimer's disease activity of DXN has been reported. DXN improved AD-like symptoms of paralysis and 5-HT sensitivity of transgenic Aβ1-42 C. elegans. In worms, DXN significantly increased Aβ monomers and decreased the toxic Aβ oligomers, thus reducing Aβ toxicity. DXN significantly suppressed the expression of hsp-16.2 induced by juglone, and up-regulated sod-3 expression. These results indicated that DXN increased stress resistance and protected C. elegans against oxidative stress. Furthermore, DXN could significantly promote DAF-16 nuclear translocation, but it did not activate SKN-1. The inhibitory effect of DXN on the Aβ toxicity was significantly reverted by daf-16 RNAi, rather than skn-1 RNAi or hsf-1 RNAi. These results indicated that DAF-16 is at least partially required for the anti-AD effect of DXN. In conclusion, DXN improved Aβ-induced pathological characteristics partially through DAF-2/DAF-16 insulin like pathway in transgenic worms. Together with our data obtained by Morris water maze test, the results showed that DXN markedly ameliorated cognitive performance impairment induced by scopolamine in mice. All the results support that DXN is a potential drug candidate to treat Alzheimer's diseases.
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Affiliation(s)
- Dejuan Zhi
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Dong Wang
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Wenqi Yang
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Ziyun Duan
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Shuqian Zhu
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Juan Dong
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Na Wang
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Ningbo Wang
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Dongqing Fei
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Zhanxin Zhang
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Xin Wang
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Meizhu Wang
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Hongyu Li
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Lanzhou, P.R. China.
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16
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Brawner KM, Kumar R, Serrano CA, Ptacek T, Lefkowitz E, Morrow CD, Zhi D, Baig KRKK, Smythies LE, Harris PR, Smith PD. Helicobacter pylori infection is associated with an altered gastric microbiota in children. Mucosal Immunol 2017; 10:1169-1177. [PMID: 28120843 PMCID: PMC5526746 DOI: 10.1038/mi.2016.131] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 11/29/2016] [Indexed: 02/07/2023]
Abstract
The intestinal microbiome in early life influences development of the mucosal immune system and predisposition to certain diseases. Because less is known about the microbiome in the stomach and its relationship to disease, we characterized the microbiota in the stomachs of 86 children and adults and the impact of Helicobacter pylori infection on the bacterial communities. The overall composition of the gastric microbiota in children and adults without H. pylori infection was similar, with minor differences in only low abundance taxa. However, the gastric microbiota in H. pylori-infected children, but not infected adults, differed significantly in the proportions of multiple high abundance taxa compared with their non-infected peers. The stomachs of H. pylori-infected children also harbored more diverse microbiota, smaller abundance of Firmicutes, and larger abundance of non-Helicobacter Proteobacteria and several lower taxonomic groups than stomachs of H. pylori-infected adults. Children with restructured gastric microbiota had higher levels of FOXP3, IL10, and TGFβ expression, consistent with increased T-regulatory cell responses, compared with non-infected children and H. pylori-infected adults. The gastric commensal bacteria in children are altered during H. pylori infection in parallel with more tolerogenic gastric mucosae, potentially contributing to the reduced gastric disease characteristic of H. pylori-infected children.
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Affiliation(s)
- KM Brawner
- Department of Medicine (Gastroenterology), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - R Kumar
- Center for Clinical and Translational Science (Biomedical Informatics), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - CA Serrano
- Department of Pediatric Gastroenterology and Nutrition, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - T Ptacek
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - E Lefkowitz
- Center for Clinical and Translational Science (Biomedical Informatics), Pontificia Universidad Católica de Chile, Santiago, Chile,Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - CD Morrow
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - D Zhi
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL 35294
| | - KR Kyanam Kabir Baig
- Department of Medicine (Gastroenterology), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - LE Smythies
- Department of Medicine (Gastroenterology), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - PR Harris
- Department of Pediatric Gastroenterology and Nutrition, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Phillip D. Smith
- Department of Medicine (Gastroenterology), Pontificia Universidad Católica de Chile, Santiago, Chile,Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294,VA Medical Center Research Service, Birmingham, AL
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17
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Sun Y, Zhao Q, Zhi D, Wang Z, Wang Y, Xie Q, Wu Z, Wang X, Li Y, Yu L, Yang H, Zhou J, Li H. Sporosarcina terrae sp. nov., isolated from orchard soil. Int J Syst Evol Microbiol 2017; 67:2104-2108. [DOI: 10.1099/ijsem.0.001835] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- Ying Sun
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Institute of Microbiology, School of Life Science, Lanzhou University, Tianshui Road No.222, Lanzhou 730000, PR China
- Gansu Institute for Drug Control, Yinan Road No.7, Lanzhou 730070, PR China
| | - Qi Zhao
- State Key Laboratory of Grassland Agro-ecosystems, School of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, PR China
| | - Dejuan Zhi
- Institute for Microbial and Biochemical Pharmacy, School of Pharmacy, Lanzhou University, Donggang Road No. 199, Lanzhou 730020, PR China
| | - Zining Wang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Institute of Microbiology, School of Life Science, Lanzhou University, Tianshui Road No.222, Lanzhou 730000, PR China
| | - Yajun Wang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Institute of Microbiology, School of Life Science, Lanzhou University, Tianshui Road No.222, Lanzhou 730000, PR China
| | - Qinjian Xie
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Institute of Microbiology, School of Life Science, Lanzhou University, Tianshui Road No.222, Lanzhou 730000, PR China
| | - Zhengrong Wu
- Institute for Microbial and Biochemical Pharmacy, School of Pharmacy, Lanzhou University, Donggang Road No. 199, Lanzhou 730020, PR China
| | - Xin Wang
- Institute for Microbial and Biochemical Pharmacy, School of Pharmacy, Lanzhou University, Donggang Road No. 199, Lanzhou 730020, PR China
| | - Yang Li
- Institute for Microbial and Biochemical Pharmacy, School of Pharmacy, Lanzhou University, Donggang Road No. 199, Lanzhou 730020, PR China
| | - Lan Yu
- Institute for Microbial and Biochemical Pharmacy, School of Pharmacy, Lanzhou University, Donggang Road No. 199, Lanzhou 730020, PR China
| | - Hui Yang
- Gansu Academy of Sciences, Lanzhou 730000, PR China
| | | | - Hongyu Li
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Institute of Microbiology, School of Life Science, Lanzhou University, Tianshui Road No.222, Lanzhou 730000, PR China
- Institute for Microbial and Biochemical Pharmacy, School of Pharmacy, Lanzhou University, Donggang Road No. 199, Lanzhou 730020, PR China
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Aslibekyan S, Do AN, Xu H, Li S, Irvin MR, Zhi D, Tiwari HK, Absher DM, Shuldiner AR, Zhang T, Chen W, Tanner K, Hong C, Mitchell BD, Berenson G, Arnett DK. CPT1A methylation is associated with plasma adiponectin. Nutr Metab Cardiovasc Dis 2017; 27:225-233. [PMID: 28139377 PMCID: PMC5330786 DOI: 10.1016/j.numecd.2016.11.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 10/24/2016] [Accepted: 11/14/2016] [Indexed: 11/23/2022]
Abstract
BACKGROUND AND AIMS Adiponectin, an adipose-secreted protein that has been linked to insulin sensitivity, plasma lipids, and inflammatory patterns, is an established biomarker for metabolic health. Despite clinical relevance and high heritability, the determinants of plasma adiponectin levels remain poorly understood. METHODS AND RESULTS We conducted the first epigenome-wide cross-sectional study of adiponectin levels using methylation data on 368,051 cytosine-phosphate-guanine (CpG) sites in CD4+ T-cells from the Genetics of Lipid Lowering Drugs and Diet Network (GOLDN, n = 991). We fit linear mixed models, adjusting for age, sex, study site, T-cell purity, and family. We have identified a positive association (regression coefficient ± SE = 0.01 ± 0.001, P = 3.4 × 10-13) between plasma adiponectin levels and methylation of a CpG site in CPT1A, a key player in fatty acid metabolism. The association was replicated (n = 474, P = 0.0009) in whole blood samples from the Amish participants of the Heredity and Phenotype Intervention (HAPI) Heart Study as well as White (n = 592, P = 0.0005) but not Black (n = 243, P = 0.18) participants of the Bogalusa Heart Study (BHS). The association remained significant upon adjusting for BMI and smoking in GOLDN and HAPI but not BHS. We also identified associations between methylation loci in RNF145 and UFM1 and plasma adiponectin in GOLDN and White BHS participants, although the association was not robust to adjustment for BMI or smoking. CONCLUSION We have identified and replicated associations between several biologically plausible loci and plasma adiponectin. These findings support the importance of epigenetic processes in metabolic traits, laying the groundwork for future translational applications.
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Affiliation(s)
- S Aslibekyan
- Department of Epidemiology, University of Alabama at Birmingham, USA.
| | - A N Do
- Department of Epidemiology, University of Alabama at Birmingham, USA
| | - H Xu
- Department of Medicine, University of Maryland School of Medicine, USA
| | - S Li
- Department of Epidemiology, School of Public Health and Tropical Medicine, Tulane University, USA
| | - M R Irvin
- Department of Epidemiology, University of Alabama at Birmingham, USA
| | - D Zhi
- Department of Biostatistics, University of Alabama at Birmingham, USA
| | - H K Tiwari
- Department of Biostatistics, University of Alabama at Birmingham, USA
| | - D M Absher
- HudsonAlpha Institute for Biotechnology, USA
| | - A R Shuldiner
- Department of Medicine, University of Maryland School of Medicine, USA
| | - T Zhang
- Department of Epidemiology, School of Public Health and Tropical Medicine, Tulane University, USA
| | - W Chen
- Department of Epidemiology, School of Public Health and Tropical Medicine, Tulane University, USA
| | - K Tanner
- Department of Medicine, University of Maryland School of Medicine, USA
| | - C Hong
- Department of Medicine, University of Maryland School of Medicine, USA
| | - B D Mitchell
- Department of Medicine, University of Maryland School of Medicine, USA; Geriatrics Research and Education Clinical Center, Baltimore Veterans Administration Medical Center, Baltimore, MD, USA
| | - G Berenson
- Department of Epidemiology, School of Public Health and Tropical Medicine, Tulane University, USA
| | - D K Arnett
- Department of Epidemiology, University of Alabama at Birmingham, USA
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Liu Y, Tian F, Zhi D, Wang H, Zhao C, Li H. Novel thrombopoietin mimetic peptides bind c-Mpl receptor: Synthesis, biological evaluation and molecular modeling. Bioorg Med Chem 2017; 25:1113-1121. [DOI: 10.1016/j.bmc.2016.12.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/15/2016] [Accepted: 12/16/2016] [Indexed: 11/29/2022]
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20
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Liu Y, Zhi D, Li M, Liu D, Wang X, Wu Z, Zhang Z, Fei D, Li Y, Zhu H, Xie Q, Yang H, Li H. Shengmai Formula suppressed over-activated Ras/MAPK pathway in C. elegans by opening mitochondrial permeability transition pore via regulating cyclophilin D. Sci Rep 2016; 6:38934. [PMID: 27982058 PMCID: PMC5159904 DOI: 10.1038/srep38934] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 11/16/2016] [Indexed: 12/01/2022] Open
Abstract
Since about 30% of all human cancers contain mutationally activated Ras, down regulating the over-activation of Ras/MAPK pathway represents a viable approach for treating cancers. Over-activation of Ras/MAPK pathway is accompanied by accumulation of reactive oxygen species (ROS). One approach for developing anti-cancer drugs is to target ROS production and their accumulation. To test this idea, we have employed C. elegans of let-60 (gf) mutant, which contain over-activated let-60 (the homolog of mammalian ras) and exhibit tumor-like symptom of multivulva phenotype, to determine whether anti-oxidants can affect their tumor-like phenotype. Specifically we studied the effect of Shengmai formula (SM), a traditional Chinese medicine that has strong anti-oxidant activity, on the physiology of let-60 (gf) mutants. Unexpectedly, we found that SM treatment led to the opening of mitochondrial permeability transition pore by regulating cyclophilin D and then triggered oxidative stress and related signaling pathway activation, including p53, JNK, and p38/MAPK pathways. Finally, SM induced mitochondrial pathway of apoptosis and inhibited the tumor-like symptom of the multivulva phenotype of let-60(gf) mutants. Our results provide evidences to support that SM act as a pro-oxidant agent and could serve as a potential drug candidate for combating over-activated Ras-related cancer.
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Affiliation(s)
- Yan Liu
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, P.R. China
| | - Dejuan Zhi
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, P.R. China
| | - Menghui Li
- Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Dongling Liu
- Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xin Wang
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, P.R. China
| | - Zhengrong Wu
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, P.R. China
| | - Zhanxin Zhang
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, P.R. China
| | - Dongqing Fei
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, P.R. China
| | - Yang Li
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, P.R. China
| | - Hongmei Zhu
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, P.R. China
| | - Qingjian Xie
- Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Hui Yang
- Institute of Biology, Academy of Sciences, Lanzhou 730000, Gansu province, P.R. China.
| | - Hongyu Li
- Gansu high throughput screening and creation center for health products, School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, P.R. China
- Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
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21
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Sun C, Sanjeevi S, Luo F, Zhi D, Sanjeevi CB. Interactions between maternal killer cell immunoglobulin receptor genes and foetal HLA ligand genes contribute to type 1 diabetes susceptibility in Han Chinese. Int J Immunogenet 2016; 43:125-30. [PMID: 26991115 DOI: 10.1111/iji.12257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 02/14/2016] [Indexed: 11/30/2022]
Abstract
In this study, we aimed to test the hypothesis that KIR haplotypes (that interact with HLA class I molecules) are associated with susceptibility in patients with T1DM in utero through maternal-foetal interaction of KIR and their HLA class I ligands in Han Chinese population. We determined the KIR genes and KIR/ligand gene combination frequencies in 59 Han Chinese children with T1D and their mothers and compared it with 159 healthy control children and their mothers. The absence of KIR-2DS1 in the mother and the presence of HLA-C2 ligand in the child were negatively associated with type 1 diabetes in the child. Our results indicate that maternal KIR genes and their interaction with foetal HLA-C2 may contribute to the risk of type 1 diabetes among Han Chinese children.
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Affiliation(s)
- C Sun
- Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden.,Department of Pediatric Endocrinology and Inborn Metabolic diseases, Children's Hospital of Fudan University, Shanghai, China
| | - S Sanjeevi
- Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
| | - F Luo
- Department of Pediatric Endocrinology and Inborn Metabolic diseases, Children's Hospital of Fudan University, Shanghai, China
| | - D Zhi
- Department of Pediatric Endocrinology and Inborn Metabolic diseases, Children's Hospital of Fudan University, Shanghai, China
| | - C B Sanjeevi
- Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
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22
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Zhang W, Zhi D, Ren H, Wang D, Wang X, Zhang Z, Fei D, Zhu H, Li H. Shengmai Formula Ameliorates Pathological Characteristics in AD C. elegans. Cell Mol Neurobiol 2016; 36:1291-1302. [PMID: 26886750 DOI: 10.1007/s10571-015-0326-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 12/25/2015] [Indexed: 12/26/2022]
Abstract
Shengmai (SM) formula, a classical traditional Chinese medicine formula, is composed of Panax ginseng (Pg), Ophiopogon japonicus (Oj), and Schisandra Chinesis (Sc). SM has been clinically used to treat heart failure and ischemic heart disease. Although SM formula has been reported to be potential for fighting against Alzheimer's disease (AD) by previous works, there are many gaps in our knowledge on its usage in AD treatment on an organism level and will then need to be further clarified. In this study, transgenic Caenorhabditis elegans expressing human Aβ1-42 are used to evaluate SM formula efficacy to treat AD phenotype and to investigate its underlying mechanism. The results showed that SM formula ameliorated AD pathological characteristics of paralysis behavior and chemotaxis defect in transgenic C. elegans. With SM treatment, the number of Aβ deposits decreased, the levels of gene expressions of hsp16-2, hsp16-41, ace-1, ace-2, and TNFA1P1 homolog genes were down-regulated. Our results also showed that Oj exhibited more stronger effect on delaying paralysis in worms than Pg and Sc did, and synergistic action was observed between Pg and Oj, and Sc further enhanced the activity of Pg/Oj combination on delaying paralysis behavior. Further, SM with herbs of Pg, Oj, and Sc at a dose proportion of 9:9:6 exhibited superior therapeutic efficacy in comparison with herbs at other dose proportions. After SM formula extracted by ethanol, it delayed AD symptoms on a wider dose from 0.2 to 10.0 mg/mL with no toxic effect. These results provided more evidence for SM formula being potential to be used to treat AD.
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Affiliation(s)
- Weimin Zhang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, No. 199, Donggang West Road, Lanzhou, 730000, China
| | - Dejuan Zhi
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, No. 199, Donggang West Road, Lanzhou, 730000, China
| | - Hui Ren
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, No. 199, Donggang West Road, Lanzhou, 730000, China
| | - Dong Wang
- Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Xin Wang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, No. 199, Donggang West Road, Lanzhou, 730000, China
| | - Zhanxin Zhang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, No. 199, Donggang West Road, Lanzhou, 730000, China
| | - Dongqing Fei
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, No. 199, Donggang West Road, Lanzhou, 730000, China
| | - Hongmei Zhu
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, No. 199, Donggang West Road, Lanzhou, 730000, China
| | - Hongyu Li
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, No. 199, Donggang West Road, Lanzhou, 730000, China. .,Institute of Microbiology, School of Life Sciences, Lanzhou University, Lanzhou, China.
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Shi Y, Li H, Li J, Zhi D, Zhang X, Liu H, Wang H, Li H. Development, optimization and evaluation of emodin loaded nanoemulsion prepared by ultrasonic emulsification. J Drug Deliv Sci Technol 2015. [DOI: 10.1016/j.jddst.2015.04.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Zhao Y, Chen P, Nan W, Zhi D, Liu R, Li H. The use of (5Z)-4-bromo-5-(bromomethylene)-2(5H)-furanone for controlling acid mine drainage through the inhibition of Acidithiobacillus ferrooxidans biofilm formation. Bioresour Technol 2015; 186:52-57. [PMID: 25802048 DOI: 10.1016/j.biortech.2015.02.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 02/06/2015] [Accepted: 02/08/2015] [Indexed: 06/04/2023]
Abstract
The aim of this study was to determine whether acid mine drainage (AMD) production can be decreased by (5Z)-4-bromo-5-(bromomethylene)-2(5H)-furanone (furanone C-30) in the presence of Acidithiobacillus ferrooxidans (A. ferrooxidans). The effects of furanone C-30 on A. ferrooxidans biofilm production were determined by crystal violet staining and confocal laser scanning microscopy (CLSM). Biofilm-related gene expression was investigated using real-time RT-PCR. Finally, the effects of furanone C-30 on AMD production were evaluated. The results show that furanone C-30 inhibits the production of extracellular polymeric substances (EPS) and biofilm formation and significantly down-regulates the expression of biofilm-related genes. The decreased EPS production led to reduced pentlandite attachment and biofilm formation on pentlandite. Furthermore, the dissolution of both nickel and copper were inhibited by furanone C-30 without new acid formation. This study provides a promising biochemical method to control AMD.
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Affiliation(s)
- Yang Zhao
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Institute of Microbiology, School of Life Sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, PR China
| | - Peng Chen
- Institute for Microbial and Biochemical Pharmacy, School of Pharmacy, Lanzhou University, Donggang Road No. 199, Lanzhou 730020, PR China
| | - Wenbin Nan
- Department of Life Science and Technology, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, PR China
| | - Dejuan Zhi
- Institute for Microbial and Biochemical Pharmacy, School of Pharmacy, Lanzhou University, Donggang Road No. 199, Lanzhou 730020, PR China
| | - Ronghui Liu
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Institute of Microbiology, School of Life Sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, PR China
| | - Hongyu Li
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Institute of Microbiology, School of Life Sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, PR China; Institute for Microbial and Biochemical Pharmacy, School of Pharmacy, Lanzhou University, Donggang Road No. 199, Lanzhou 730020, PR China.
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Feng N, Zhi D, Zhang L, Tian J, Ren H, Li C, Zhu H, Li H. Molecular mechanisms of resistance to human pathogenic bacteria in Caenorhabditis elegans by MEV-1 mediated oxidative stress. Biochem Biophys Res Commun 2015; 459:481-7. [DOI: 10.1016/j.bbrc.2015.02.132] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 02/24/2015] [Indexed: 01/12/2023]
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26
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Bai Y, Zhi D, Li C, Liu D, Zhang J, Tian J, Wang X, Ren H, Li H. Infection and Immune Response in the Nematode Caenorhabditis elegans Elicited by the Phytopathogen Xanthomonas. J Microbiol Biotechnol 2014; 24:1269-79. [DOI: 10.4014/jmb.1401.01017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Zhao H, Cai W, Su S, Zhi D, Lu J, Liu S. Screening genes crucial for pediatric pilocytic astrocytoma using weighted gene coexpression network analysis combined with methylation data analysis. Cancer Gene Ther 2014; 21:448-55. [PMID: 25257306 DOI: 10.1038/cgt.2014.49] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 08/18/2014] [Accepted: 08/19/2014] [Indexed: 12/25/2022]
Abstract
To identify novel genes associated with pediatric pilocytic astrocytoma (PA) for better understanding the molecular mechanism underlying the pediatric PA pathogenesis. Gene expression profile data of GSE50161 and GSE44971 and the methylation data of GSE44684 were downloaded from Gene Expression Omnibus. The differentially expressed genes (DEGs) between PA and normal control samples were screened using the limma package in R, and then used to construct weighted gene coexpression network (WGCN) using the WGCN analysis (WGCNA) package in R. Significant modules of DEGs were selected using the clustering analysis. Function enrichment analysis of the DEGs in significant modules were performed using the WGCNA package and clusterprofiler package in R. Correlation between methylation sites of DEGs and PA was analyzed using the CpGassoc package in R. Totally, 3479 DEGs were screened in PA samples. Thereinto, 3424 DEGs were used to construct the WGCN. Several significant modules of DEGs were selected based on the WGCN, in which the turquoise module was positively related to PA, whereas blue module was negatively related to PA. DEGs (for example, DOCK2 (dedicator of cytokinesis 2), DOCK8 and FCGR2A (Fc fragment of IgG, low affinity IIa)) in blue module were mainly involved in Fc gamma R-mediated phagocytosis pathway and natural killer cell-mediated cytotoxicity pathway. Methylations of 14 DEGs among the top 30 genes in blue module were related to PA. Our data suggest that DOCK2, DOCK8 and FCGR2A may represent potential therapeutic targets in PA that merits further investigation.
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Affiliation(s)
- H Zhao
- Department of Neurosurgery, Shengjing Hospital, China Medical University, Shenyang, China
| | - W Cai
- Department of Oncology, Shengjing Hospital, China Medical University, Shenyang, China
| | - S Su
- Department of Neurosurgery, Shengjing Hospital, China Medical University, Shenyang, China
| | - D Zhi
- Department of Neurosurgery, Shengjing Hospital, China Medical University, Shenyang, China
| | - J Lu
- Department of Neurosurgery, Shengjing Hospital, China Medical University, Shenyang, China
| | - S Liu
- Department of Neurosurgery, Shengjing Hospital, China Medical University, Shenyang, China
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Wang Z, Zhi D, Zhao Y, Zhang H, Wang X, Ru Y, Li H. Lateral flow test strip based on colloidal selenium immunoassay for rapid detection of melamine in milk, milk powder, and animal feed. Int J Nanomedicine 2014; 9:1699-707. [PMID: 24729705 PMCID: PMC3979797 DOI: 10.2147/ijn.s58942] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Although high melamine (MEL) intake has been proven to cause serious health problems, MEL is sometimes illegally added to milk products and animal feed, arousing serious food safety concerns. A satisfactory method of detecting MEL in onsite or in-home testing is in urgent need of development. This work aimed to explore a rapid, convenient, and cost-effective method of identifying MEL in milk products or other food by colloidal selenium-based lateral flow immunoassay. Colloidal selenium was synthesized by L-ascorbic acid to reduce seleninic acid at room temperature. After conjugation with a monoclonal antibody anti-MEL, a test strip was successfully prepared. The detection limit of the test strip reached 150 μg/kg, 1,000 μg/kg, and 800 μg/kg in liquid milk, milk powder, and animal feed, respectively. No cross-reactions with homologues cyanuric acid, cyanurodiamide, or ammelide were found. Moreover, the MEL test strip can remain stable after storage for 1 year at room temperature. Our results demonstrate that the colloidal selenium MEL test strip can detect MEL in adulterated milk products or animal feed conveniently, rapidly, and sensitively. In contrast with a colloidal gold MEL test strip, the colloidal selenium MEL test strip was easy to prepare and more cost-efficient.
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Affiliation(s)
- Zhizeng Wang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, People's Republic of China
| | - Dejuan Zhi
- Institute of Microbiology and Biochemical Pharmacy, School of Pharmaceutics, Lanzhou University, Lanzhou, People's Republic of China
| | - Yang Zhao
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, People's Republic of China
| | - Hailong Zhang
- Institute of Microbiology and Biochemical Pharmacy, School of Pharmaceutics, Lanzhou University, Lanzhou, People's Republic of China
| | - Xin Wang
- Institute of Microbiology and Biochemical Pharmacy, School of Pharmaceutics, Lanzhou University, Lanzhou, People's Republic of China
| | - Yi Ru
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, People's Republic of China
| | - Hongyu Li
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, People's Republic of China ; Institute of Microbiology and Biochemical Pharmacy, School of Pharmaceutics, Lanzhou University, Lanzhou, People's Republic of China
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Liu D, Zhi D, Zhou T, Yu Q, Wan F, Bai Y, Li H. Realgar bioleaching solution is a less toxic arsenic agent in suppressing the Ras/MAPK pathway in Caenorhabditis elegans. Environ Toxicol Pharmacol 2013; 35:292-299. [PMID: 23376179 DOI: 10.1016/j.etap.2013.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 12/29/2012] [Accepted: 01/02/2013] [Indexed: 06/01/2023]
Abstract
To explore other arsenic derivatives with anticancer effects and fewer adverse effects, realgar bioleaching solution (RBS) has been found to be a viable approach. Here we used C. elegans as a model organism to its possible efficacy for anti-cancer effect of RBS. Our results indicated that RBS significantly suppressed the multivulva (Muv) phenotype of let-60 ras(gf) mutant that was positive correlated to arsenic concentrations in worms and also inhibited Muv phenotype of lin-15(lf) upstream of Ras/MAPK pathway, but did not affect the Muv phenotype resulting from loss-of-function mutations of lin-l(lf) downstream of Ras/MAPK pathway, which may be mechanism-based. In toxicity tests, RBS did not lead to reduction resulting from arsenic trioxide (ATO) in the number of pharyngeal pumping which was orthologous to vertebrate heart beating in wild type C. elegans. Overall, RBS was likely to be a potential anti-cancer drug candidate with high efficiency and low toxicity.
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Affiliation(s)
- Dongling Liu
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, PR China
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Willey C, Anderson J, Duarte C, Zhi D, Cui X, Choradia N, Srinivasasainagendra V, Wang J, Gillespie G. Kinomic Proband Model of Radiation Response From Patient-derived GBM Xenolines. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zhi D, Irvin MR, Gu CC, Stoddard AJ, Lorier R, Matter A, Rao DC, Srinivasasainagendra V, Tiwari HK, Turner A, Broeckel U, Arnett DK. Whole-exome sequencing and an iPSC-derived cardiomyocyte model provides a powerful platform for gene discovery in left ventricular hypertrophy. Front Genet 2012; 3:92. [PMID: 22654895 PMCID: PMC3361011 DOI: 10.3389/fgene.2012.00092] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Accepted: 05/08/2012] [Indexed: 11/13/2022] Open
Abstract
Rationale: Left ventricular hypertrophy (LVH) is a heritable predictor of cardiovascular disease, particularly in blacks. Objective: Determine the feasibility of combining evidence from two distinct but complementary experimental approaches to identify novel genetic predictors of increased LV mass. Methods: Whole-exome sequencing (WES) was conducted in seven African-American sibling trios ascertained on high average familial LV mass indexed to height (LVMHT) using Illumina HiSeq technology. Identified missense or nonsense (MS/NS) mutations were examined for association with LVMHT using linear mixed models adjusted for age, sex, body weight, and familial relationship. To functionally assess WES findings, human induced pluripotent stem cell-derived cardiomyocytes (induced pluripotent stem cell-CM) were stimulated to induce hypertrophy; mRNA sequencing (RNA-seq) was used to determine gene expression differences associated with hypertrophy onset. Statistically significant findings under both experimental approaches identified LVH candidate genes. Candidate genes were further prioritized by seven supportive criteria that included additional association tests (two criteria), regional linkage evidence in the larger HyperGEN cohort (one criterion), and publically available gene and variant based annotations (four criteria). Results: WES reads covered 91% of the target capture region (of size 37.2 MB) with an average coverage of 65×. WES identified 31,426 MS/NS mutations among the 21 individuals. A total of 295 MS/NS variants in 265 genes were associated with LVMHT with q-value <0.25. Of the 265 WES genes, 44 were differentially expressed (P < 0.05) in hypertrophied cells. Among the 44 candidate genes identified, 5, including HLA-B, HTT, MTSS1, SLC5A12, and THBS1, met 3 of 7 supporting criteria. THBS1 encodes an adhesive glycoprotein that promotes matrix preservation in pressure-overload LVH. THBS1 gene expression was 34% higher in hypertrophied cells (P = 0.0003) and a predicted conserved and damaging NS variant in exon 13 (A2099G) was significantly associated with LVHMT (P = 4 × 10−6). Conclusion: Combining evidence from cutting-edge genetic and cellular experiments can enable identification of novel LVH risk loci.
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Affiliation(s)
- D Zhi
- Department of Biostatistics, University of Alabama at Birmingham Birmingham, AL, USA
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Li X, Pang X, Zhi D, Wang J, Li M, Li H. Extracellular superoxide anion production contributes to the virulence ofXanthomonas oryzaepv.oryzae. Can J Microbiol 2009; 55:110-6. [DOI: 10.1139/w08-112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Endogenous superoxide anion production was determined by electron spin resonance in wild-type strains and avrXa7 mutants of Xanthomonas oryzae pv. oryzae . The localization of superoxide anion was carried out in the intra- and extra-cellular fractions. Results showed the presence of superoxide anion in multi-locations of X. oryzae pv. oryzae cells. The extracellular fraction was the major location of superoxide anion production. Furthermore, a positive relationship was shown between the levels of endogenous superoxide anion and the virulence of strains. These indubitable results suggested that the superoxide anion contributes to the virulence of X. oryzae pv. oryzae.
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Affiliation(s)
- Xin Li
- MOE Key Laboratory of Arid and Grassland Ecology, School of Life sciences, Lanzhou University, Lanzhou 730000, China
- Food and Bioengineering College, Henan University of Science and Technology, Luoyang 471000, China
- Key Laboratory of Monitoring and Management of Plant Diseases and Pests, Ministry of Agriculture, Department of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Department of Plant Protection, Gansu Agricultural University, Lanzhou 730060, China
| | - Xinyue Pang
- MOE Key Laboratory of Arid and Grassland Ecology, School of Life sciences, Lanzhou University, Lanzhou 730000, China
- Food and Bioengineering College, Henan University of Science and Technology, Luoyang 471000, China
- Key Laboratory of Monitoring and Management of Plant Diseases and Pests, Ministry of Agriculture, Department of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Department of Plant Protection, Gansu Agricultural University, Lanzhou 730060, China
| | - Dejuan Zhi
- MOE Key Laboratory of Arid and Grassland Ecology, School of Life sciences, Lanzhou University, Lanzhou 730000, China
- Food and Bioengineering College, Henan University of Science and Technology, Luoyang 471000, China
- Key Laboratory of Monitoring and Management of Plant Diseases and Pests, Ministry of Agriculture, Department of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Department of Plant Protection, Gansu Agricultural University, Lanzhou 730060, China
| | - Jinsheng Wang
- MOE Key Laboratory of Arid and Grassland Ecology, School of Life sciences, Lanzhou University, Lanzhou 730000, China
- Food and Bioengineering College, Henan University of Science and Technology, Luoyang 471000, China
- Key Laboratory of Monitoring and Management of Plant Diseases and Pests, Ministry of Agriculture, Department of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Department of Plant Protection, Gansu Agricultural University, Lanzhou 730060, China
| | - Minquan Li
- MOE Key Laboratory of Arid and Grassland Ecology, School of Life sciences, Lanzhou University, Lanzhou 730000, China
- Food and Bioengineering College, Henan University of Science and Technology, Luoyang 471000, China
- Key Laboratory of Monitoring and Management of Plant Diseases and Pests, Ministry of Agriculture, Department of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Department of Plant Protection, Gansu Agricultural University, Lanzhou 730060, China
| | - Hongyu Li
- MOE Key Laboratory of Arid and Grassland Ecology, School of Life sciences, Lanzhou University, Lanzhou 730000, China
- Food and Bioengineering College, Henan University of Science and Technology, Luoyang 471000, China
- Key Laboratory of Monitoring and Management of Plant Diseases and Pests, Ministry of Agriculture, Department of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Department of Plant Protection, Gansu Agricultural University, Lanzhou 730060, China
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Li X, Li H, Pang X, Feng H, Zhi D, Wen J, Wang J. Localization changes of endogenous hydrogen peroxide during cell division cycle of Xanthomonas. Mol Cell Biochem 2007; 300:207-13. [PMID: 17375266 DOI: 10.1007/s11010-006-9385-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2006] [Accepted: 11/21/2006] [Indexed: 10/23/2022]
Abstract
Production and localization of endogenous hydrogen peroxide (H2O2) were investigated in strains of Xanthomonas by histochemical analysis under electron microscopy. Even though the levels of endogenous H2O2 production were different among various strains, the produced H2O2 was localized in the cell wall of all Xanthomonas strains tested. The impairment of the level of endogenous H2O2 accumulation resulted in a significantly decreased growth rate of bacteria, regardless if the difference of the H2O2 level is originally present between wild type strains or caused by mutation of the ahpC gene of Xanthomonas. The endogenous accumulation of H2O2 positively correlates with the cell division. Interestingly, the accumulated H2O2 was also localized in the mesosome-like structure and nucleoids during the cell division cycle. Furthermore, results revealed quantitative and dimensional changes of H2O2 accumulation in the two additional locations. These findings indicated that the additional locations of the accumulated H2O2 were closely associated with the process of cell division. Together, these results suggest that the endogenous H2O2 production plays an important role in cell proliferation of Xanthomonas.
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Affiliation(s)
- Xin Li
- School of Life Sciences, Lanzhou University, Lanzhou 730000, China
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Feng H, Li H, Li X, Duan J, Liang H, Zhi D, Ma J. The flexible interrelation between AOX respiratory pathway and photosynthesis in rice leaves. Plant Physiol Biochem 2007; 45:228-35. [PMID: 17408956 DOI: 10.1016/j.plaphy.2007.01.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2006] [Accepted: 01/15/2007] [Indexed: 05/14/2023]
Abstract
Alternative respiratory pathway was investigated in rice seedlings grown under total darkness, light/dark cycle, or continuous light. The capacity of the alternative pathway was relatively higher in leaves that had longer light exposure. An analysis of rice AOX1 multigene family revealed that AOX1c, but not AOX1a and AOX1b, had a light-independent expression. The alternative oxidase (AOX) inhibitor, salicylhydroxamic acid (SHAM, 1mM), inhibited nearly 68% of the capacity of the alternative pathway in leaves grown under different light conditions. The plants grown under different light periods were treated with SHAM and then were exposed to illumination for 4h. The transition from dark to 4h of light stimulated the capacity of alternative pathway in etiolated rice seedlings and in those grown under light/dark cycle, whereas the capacity of the alternative pathway was constant in seedlings grown under continuous light with additional 4h of illumination. Etiolated leaves did not show any CO(2) fixation after 4h of illumination, and the increase in chlorophyll content was delayed by the SHAM pretreatment. When seedlings grown under light/dark cycle were moved from dark and exposed to 4h of light, increases in chlorophyll content and CO(2) fixation rate were reduced by SHAM. Although these parameters were stable in plants grown under continuous light, SHAM decreased CO(2) fixation rate but not the chlorophyll content. These results indicate that the role and regulation of AOX in light are determined by the developmental stage of plant photosynthetic apparatus.
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Affiliation(s)
- Hanqing Feng
- Department of Biochemistry and Molecular Biology, School of Life Science, Lanzhou University, 298 Tian Shui Road, 730000 Lanzhou, Gansu, P.R. China.
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Lin X, Zhi D, Zhang S. Inhibiting effect of moderate hypothermia on cell apoptosis after diffuse brain injury in rats. Chin J Traumatol 2001; 4:14-9. [PMID: 11835702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVE To explore the variant processes of cell apoptosis and the inhibiting effect of moderate hypothermia on cell apoptosis after diffuse brain injury. METHODS Models of diffuse brain injury were induced by the trauma device reported by Marmarou. A total of 128 Wistar rats were divided into 4 groups: the uninjured group (Group A, n=8), the severely injured group (Group B, n=60), the mildly injured group (Group C, n=30) and the mild hypothermia group (Group D, n=30). In Group D, the severely injured rats were treated with moderate hypothermia to keep the rectal temperature at 32 degrees C (standard deviation for 0.1 degree C) for 6 hours. Then the morphology, the characteristics and the quantity of apoptotic cells in the cerebral cortex and in the hippocampus regions after different severities of craniocerebral injuries were observed and compared under an electronic microscope, with terminal deoxynucleotidyl nick end labeling (TUNEL) in DNA fragmentation and with agarose gel electrophoresis. RESULTS TUNEL showed apoptotic cells increased according to the injury severity, and they peaked at 48 hours after injury and then declined. In Group C, apoptosis was located in the CA(2) and CA(3) areas of the hippocampus. And in Group B, apoptosis increased evidently, and located in the whole hippocampus and in the frontal and parietal cortex regions. The hypothermia-treated rats had some apoptotic cells, too. However, even at 24, 48 and 72 hours after injury there were significantly fewer apoptotic cells in the cortex and in the hippocampus in Group D than that in the non-treated groups. Electron microscopy showed that the apoptotic cells were round and shrunken in morphology and the nuclei were round and condensed at 24 and 48 hours after injury. And the apoptosis at 48 hours was more severe than that at 24 hours. The hypothermia-treated rats had no apoptotic cells. Gel electrophoresis showed that characteristic DNA "ladders" were observed in the cortex and in the hippocampus at 48 hours after severe injury. But there was no DNA "ladder" at other time points in the severely injured group, in the mildly injured group and in the hypothermia-treated group. CONCLUSIONS It suggests that apoptosis occurs after diffuse brain injury and apoptotic cells increase with the injury severity. Moderate hypothermia has a specific inhibiting effect on cell apoptosis after diffuse brain injury in rats.
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Affiliation(s)
- X Lin
- Brain Injury Center, Tianjin Huanhu Hospital, Tianjin 300060, China
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