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Cui MS, Niu F, Ji RS, Duan L, Zhang X. Experimental Study on Flame Chemical Composition of Coal and Ammonia Gas-Solid Jet in Flat Flame Burner. ACS Omega 2024; 9:11769-11779. [PMID: 38496997 PMCID: PMC10938446 DOI: 10.1021/acsomega.3c09231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 01/24/2024] [Accepted: 02/06/2024] [Indexed: 03/19/2024]
Abstract
Ammonia as a fuel to partially or completely replace fossil fuels is one of the effective ways to reduce carbon dioxide, and the research on ammonia coal cocombustion is of great significance. The combustion characteristics of ammonia are very different from those of pulverized coal, resulting in the ignition and emission characteristics of ammonia and pulverized coal gas flow that is different from traditional pulverized coal flame. In this paper, the effect of pulverized coal concentration in coal and ammonia mixed combustion jet on the ignition distance and gas-phase components at different positions of the jet flame were studied experimentally on the flat flame burner, and the conditions of ignition and ignition stability of coal and ammonia gas-solid fuel were expounded. It was found that the ammonia mixed with pulverized coal changed the temperature field of the flat flame burner and therefore the ignition characteristics of the jet were changed. The ignition delay time at the same jet speed was positively correlated with the pulverized coal concentration, but when the pulverized coal concentration continued to decrease, the influence on the ignition delay time gradually became smaller. The composition of coal ammonia gas-solid fuel changed the heat transfer path and share during combustion, and finally, the flame temperature was negatively correlated with the concentration of pulverized coal. Therefore, the reduction of the pulverized coal concentration was conducive to the stable combustion of coal ammonia mixed fuel. When HAB = 100 mm, the conversion rate of fuel N to NOx per unit mass of coal ammonia mixture increased with the increase of pulverized coal concentration. The NOx production amount first increased and then decreased with the increase of pulverized coal concentration, and the amount of N2O and NO2 decreased rapidly with the increase of HAB. The proportion of NOx in NO exceeded 94%, which was conducive to achieving low nitrogen combustion of coal and ammonia gas-solid fuel. In general, the O2 concentration in the ammonia coal jet flame decreased, the flue gas temperature, and NOx and CO generation increased after mixing ammonia, and the optimal pulverized coal concentration in this experiment was 0.41 kgc/kga (mass ratio of pulverized coal to the sum of N2 and NH3).
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Affiliation(s)
- M S Cui
- Beijing Tiandi Rongchuang Technology Co. Ltd., Beijing 100011, China
- National Energy Technology & Equipment Laboratory of Coal Utilization and Emission Control, Beijing 100011, China
| | - F Niu
- Beijing Tiandi Rongchuang Technology Co. Ltd., Beijing 100011, China
- National Energy Technology & Equipment Laboratory of Coal Utilization and Emission Control, Beijing 100011, China
| | - R S Ji
- Beijing Tiandi Rongchuang Technology Co. Ltd., Beijing 100011, China
- National Energy Technology & Equipment Laboratory of Coal Utilization and Emission Control, Beijing 100011, China
| | - L Duan
- Beijing Tiandi Rongchuang Technology Co. Ltd., Beijing 100011, China
- National Energy Technology & Equipment Laboratory of Coal Utilization and Emission Control, Beijing 100011, China
| | - X Zhang
- Beijing Tiandi Rongchuang Technology Co. Ltd., Beijing 100011, China
- National Energy Technology & Equipment Laboratory of Coal Utilization and Emission Control, Beijing 100011, China
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Li P, Xiao X, Wang J, Niu F, Huang J, Xie B, Ye L, Zhang C, Wang D, Wu Q, Zheng X, Gai Y, Li H, Jiao C. Correction: Transcriptional insights of citrus defense response against Diaporthe citri. BMC Plant Biol 2023; 23:666. [PMID: 38151722 PMCID: PMC10752013 DOI: 10.1186/s12870-023-04694-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Affiliation(s)
- Pudong Li
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Xiaoe Xiao
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Jingrui Wang
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Fan Niu
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Jiangnan Huang
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Bianyue Xie
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Lu Ye
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Chaofan Zhang
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Dengliang Wang
- Quzhou Academy of agricultural and Forestry Sciences, Quzhou, 323000, Zhejiang, China
| | - Qun Wu
- Quzhou Academy of agricultural and Forestry Sciences, Quzhou, 323000, Zhejiang, China
| | - Xueliang Zheng
- Agricultural Characteristic Industry Development Center of Quzhou City, Quzhou, 323000, Zhejiang, China
| | - Yunpeng Gai
- School of Grassland Science, Beijing Forestry University, Beijing, 100083, China
| | - Hongye Li
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
| | - Chen Jiao
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
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Li P, Xiao X, Wang J, Niu F, Huang J, Xie B, Ye L, Zhang C, Wang D, Wu Q, Zheng X, Gai Y, Li H, Jiao C. Transcriptional insights of citrus defense response against Diaporthe citri. BMC Plant Biol 2023; 23:614. [PMID: 38044435 PMCID: PMC10694908 DOI: 10.1186/s12870-023-04624-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 11/20/2023] [Indexed: 12/05/2023]
Abstract
Citrus melanose, caused by Diaporthe citri, is one of the most important and widespread fungal diseases of citrus. Previous studies demonstrated that the citrus host was able to trigger the defense response to restrict the spread of D. citri. However, the molecular mechanism underlying this defense response has yet to be elucidated. Here, we used RNA-Seq to explore the gene expression pattern at the early (3 days post infection, dpi) and late (14 dpi) infection stages of citrus leaves in response to D. citri infection, and outlined the differences in transcriptional regulation associated with defense responses. The functional enrichment analysis indicated that the plant cell wall biogenesis was significantly induced at the early infection stage, while the callose deposition response was more active at the late infection stage. CYP83B1 genes of the cytochrome P450 family were extensively induced in the callus deposition-mediated defense response. Remarkably, the gene encoding pectin methylesterase showed the highest upregulation and was only found to be differentially expressed at the late infection stage. Genes involved in the synthesis and regulation of phytoalexin coumarin were effectively activated. F6'H1 and S8H, encoding key enzymes in the biosynthesis of coumarins and their derivatives, were more strongly expressed at the late infection stage than at the early infection stage. Collectively, our study profiled the response pattern of citrus leaves against D. citri infection and provided the transcriptional evidence to support the defense mechanism.
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Affiliation(s)
- Pudong Li
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Xiaoe Xiao
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Jingrui Wang
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Fan Niu
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Jiangnan Huang
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Bianyue Xie
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Lu Ye
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Chaofan Zhang
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Dengliang Wang
- Quzhou Academy of agricultural and Forestry Sciences, Quzhou, 323000, Zhejiang, China
| | - Qun Wu
- Quzhou Academy of agricultural and Forestry Sciences, Quzhou, 323000, Zhejiang, China
| | - Xueliang Zheng
- Agricultural Characteristic Industry Development Center of Quzhou City, Quzhou, Zhejiang, 323000, China
| | - Yunpeng Gai
- School of Grassland Science, Beijing Forestry University, Beijing, 100083, China
| | - Hongye Li
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
| | - Chen Jiao
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
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Niu F, Yang R, Feng H, Liu Y, Liu R, Ma B. A GPX4 non-enzymatic domain and MDM2 targeting peptide PROTAC for acute lymphoid leukemia therapy through ferroptosis induction. Biochem Biophys Res Commun 2023; 684:149125. [PMID: 37897912 DOI: 10.1016/j.bbrc.2023.149125] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 10/12/2023] [Accepted: 10/16/2023] [Indexed: 10/30/2023]
Abstract
Ferroptosis, an emerging form of programmed cell death, has garnered substantial attention as a potential target for cancer therapy. However, despite the potential promise, no ferroptosis-related therapies have progressed to clinical trials. Identifying disease types sensitive to ferroptosis and developing specific ferroptosis-targeting drugs are critical focal points in the field of ferroptosis-based treatment. In this study, we conducted a comprehensive database analysis and presented compelling evidence indicating a high expression of GPX4 in patients with acute lymphoblastic leukemia (ALL), significantly correlating with poor prognosis. Notably, elevated GPX4 expression is closely associated with ALL relapse, a major challenge in the treatment of this disease. Building upon these findings, we devised a novel peptide-based Proteolysis Targeting Chimeras (PROTAC) drug targeting GPX4 through computer-aided design. In contrast to existing drugs that target the conjugative enzyme active site, our design focused on a peptide drug targeting the non-active site of GPX4. Furthermore, we strategically selected MDM2, an E3 ligase highly expressed in ALL, for the PROTAC drug design. This deliberate choice amplifies the drug's effect on cancer cells while minimizing its impact on normal cells, achieving desirable selectivity for cancer cells. Leveraging nanogold delivery, we successfully facilitated intracellular action of the GPX4-targeting peptide PROTAC drug, denoted as Au-PGPD (peptide GPX4 PROTAC drug). Au-PGPD effectively induced GPX4 degradation and inhibited ALL cell proliferation. Remarkably, Au-PGPD exhibited significantly less efficacy on normal cells, underscoring the selectivity and safety of our design.
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Affiliation(s)
- Fan Niu
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Runyu Yang
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Hui Feng
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yi Liu
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Ruimin Liu
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Bohan Ma
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an, China.
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Yang R, Du Y, Zhang M, Liu Y, Feng H, Liu R, Yang B, Xiao J, He P, Niu F. Multi-omics analysis reveals interferon-stimulated gene OAS1 as a prognostic and immunological biomarker in pan-cancer. Front Immunol 2023; 14:1249731. [PMID: 37928544 PMCID: PMC10623006 DOI: 10.3389/fimmu.2023.1249731] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/09/2023] [Indexed: 11/07/2023] Open
Abstract
Introduction OAS1(2'-5'-oligoadenylate synthetase 1) is a member of the Interferon-Stimulated Genes which plays an important role in the antiviral process. In recent years, the role of OAS1 in tumors has attracted attention, and it was found to be associated with prognosis in several tumors. However, the mechanism by which OAS1 affects tumors is unclear and pan-cancer study of OAS1 is necessary to better understand its implication in cancers. Methods The expression, prognostic value, genetic alteration, alternative splicing events of OAS1 in pan-cancers were analyzed using TCGA, GTEx, HPA, GEPIA and OncoSplicing databases. OAS1 associated immune cell infiltration was evaluated using the ESTIMATE, xCell, CIBERSORT and QUANTISEQ algorithm. Single cell transcriptome data download using TISH database. Finally, the roles of the OAS1 on apoptosis, migration and invasion were investigated in two pancreatic cancer cells. Results Our results revealed significant differences in OAS1 expression among various tumors, which had prognostic implications. In addition, we investigated the impact of OAS1 on genomic stability, methylation status, and other factors across different types of cancer, and the effects of these factors on prognosis. Notably, our study also demonstrated that OAS1 overexpression can contribute to CTL dysfunction and macrophage M2 polarization. In addition, cell experiments showed that the knockdown of OAS1 could reduce the invasive ability and increased the apoptosis rate of PAAD cells. Discussion These results confirmed that OAS1 could be a prognostic biomarker and therapeutic target for its potential role in CTL dysfunction and macrophage M2 polarization.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Pengcheng He
- Department of Hematology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Fan Niu
- Department of Hematology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Zhang YM, Zhang LY, Li YY, Zhou H, Miao ZM, Liu ZW, Zhou GC, Zhou T, Niu F, Li J, Hong T, He JP, Ding N, Zhang YN, Hua JR, Wang JF, Liu YQ. Radiation-Induced Bystander Effect on the Genome of Bone Marrow Mesenchymal Stem Cells in Lung Cancer. Antioxid Redox Signal 2023; 38:747-767. [PMID: 36242096 DOI: 10.1089/ars.2022.0072] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Aims: Radiation by-radiation effect (RIBE) can induce the genomic instability of bone marrow mesenchymal stem cells (BMSCs) adjacent to lung cancer, and this effect not only exists in the short-term, but also accompanies it in the long-term, but its specific mechanism is not clear. Our goal is to explore the similarities and differences in the mechanism of genomic damage in tumor-associated BMSCs induced by short-term and long-term RIBE, and to provide a theoretical basis for adjuvant drugs for protection against RIBE at different clinical time periods. Results: We found that both short- and long-term RIBE induced genomic instability. We could show a high expression of TGF-β1, TNF-α, and HIF-1α in tumor-associated BMSCs after short-term RIBE whereas only TNF-α and HIF-1α expression was increased in long-term RIBE. We further confirmed that genomic instability is associated with the activation of the HIF-1α pathway and that this is mediated by TNF-α and TGF-β1. In addition, we found differences in the mechanisms of genomic instability in the considered RIBE windows of analysis. In short-term RIBE, both TNF-α and TGF-β1 play a role, whereas only TNF-α plays a decisive role in long-term RIBE. In addition, there were differences in BMSC recruitment and genomic instability of different tissues with a more pronounced expression in tumor and bone marrow than compared to lung. Innovation and Conclusion: We could show dynamic changes in the expression of the cytokines TGF-β1 and TNF-α during short- and long-term RIBE. The differential expression of the two is the key to causing the genomic damage of tumor-associated BMSCs in the considered windows of analysis. Therefore, these results may serve as a guideline for the administration of radiation protection adjuvant drugs at different clinical stages. Antioxid. Redox Signal. 38, 747-767.
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Affiliation(s)
- Yi-Ming Zhang
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Li-Ying Zhang
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
- Gansu Institute of Cardiovascular Diseases, Lanzhou, China
| | - Yang-Yang Li
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Heng Zhou
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Zhi-Ming Miao
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Zhi-Wei Liu
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Gu-Cheng Zhou
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Ting Zhou
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Fan Niu
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Jing Li
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Tao Hong
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Jin-Peng He
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Nan Ding
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Ya-Nan Zhang
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Jun-Rui Hua
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Ju-Fang Wang
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Yong-Qi Liu
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
- Key Laboratory of Dunhuang Medicine, Ministry of Education, Lanzhou, China
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Li Y, Zhang L, Zhang Y, Miao Z, Liu Z, Zhou G, He J, Ding N, Zhou H, Zhou T, Niu F, Li J, Liu Y. Potential molecular mechanism of Guiqi Baizhu Decoction in radiation-induced intestinal edema by regulating HIF-1a, AQP4 and Na +/K +-ATPase. Phytomedicine 2022; 107:154445. [PMID: 36130463 DOI: 10.1016/j.phymed.2022.154445] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 04/09/2022] [Revised: 07/05/2022] [Accepted: 09/05/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Guiqi Baizhu Decoction (GQBZD) has a good protective effect on radiation-induced intestinal edema (RIIE). However, the underlying molecular mechanisms need further elucidation. PURPOSE To reveal the potential mechanism of RIIE and GQBZD treatment. METHODS SD rats were irradiated with 6Gy X-ray to establish RIIE model. The general condition of the rats was observed; the dry/wet weight ratio of colon tissue was detected; the morphological changes of colon tissue were observed by HE staining; the expressions of ROS, HIF-1α and AQP4 in colon tissue were detected by confocal laser scanning; the expression of edema-related proteins was detected by Western blot. In addition, human colon epithelial cells (NCM460) was irradiated with 2Gy X-ray, and HIF-1α expression in NCM460 was knocked down by small interfering RNA (siRNA) transfection, and the activity of Na+/K+-ATPase was detected by enzyme activity kit; the ROS expression was detected by flow cytometer; the AQP4 expression was detected by laser confocal microscopy; and the expression of edema-related proteins were detected by Western blot. RESULTS We found that after irradiation, the colon tissue of rats was significantly edema, mainly manifested as mucosal and submucosal edema, and the ultrastructure was reflected in the structural damage of nucleus and mitochondria. ROS, HIF-1α and AQP4 were significantly expressed, and Na+/K+-ATPase expression/activity was decreased. After the intervention of GQBZD, the edema of the colon tissue of the rats was improved, the expressions of ROS, HIF-1α and AQP4 were decreased, and the expression/activity of Na+/K+-ATPase was increased. CONCLUSION Ionizing radiation (IR) can cause significant intestinal edema. AQP4 and Na+/K+-ATPase are the key factors of RIIE, which are regulated by ROS and HIF-1α. GQBZD can improve hypoxia and oxidative stress, regulate the expression of AQP4 and Na+/K+-ATPase, and achieve a protective effect on RIIE. This study is the first to reveal the mechanism of RIIE.
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Affiliation(s)
- Yangyang Li
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China
| | - Liying Zhang
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China; Gansu Institute of Cardiovascular Diseases, Lanzhou, China
| | - Yiming Zhang
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China
| | - Zhiming Miao
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China
| | - Zhiwei Liu
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China
| | - Gucheng Zhou
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China
| | - Jinpeng He
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Nan Ding
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Heng Zhou
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Ting Zhou
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China
| | - Fan Niu
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China
| | - Jing Li
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China
| | - Yongqi Liu
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China; Key Laboratory of Medicine and Translation of the Ministry of Education of Dunhuang,Lanzhou,China.
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Feng H, Liu Y, Zhang M, Liu R, Wang J, Wang W, He P, Zhang P, Niu F. De Novo design of a humanized antiCD33 antibody-oridonin conjugate for acute myeloid leukemia therapy. Biochem Biophys Res Commun 2022; 629:152-158. [PMID: 36122452 DOI: 10.1016/j.bbrc.2022.09.032] [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: 08/24/2022] [Revised: 08/26/2022] [Accepted: 09/07/2022] [Indexed: 11/02/2022]
Abstract
Acute myeloid leukemia (AML) is the most common blood cancer in adults. Patients' 5-year overall survival is less than 30% thus having a poor prognosis. To date, the development of novel target therapies is still necessary to ameliorate patients' survival. Antibody-drug conjugates (ADCs) represent a promising class of drugs for the treatment of AML. CD33 is highly expressed on AML cells, and the FDA-approved CD33-targeted ADC drug-gemtuzumab ozogamicin (GO) has proved the feasibility of CD33-targeted ADC drug design. In this study, we constructed a novel CD33-targeted ADC drug composed of a humanized anti-CD33 antibody and oridonin as a payload with a cleaved chemical linker. Oridonin is a natural product that has great cancer therapy potential while its poor bioavailability and targeting ability limited its clinical use. Herein, we demonstrated that antiCD33-oridonin specifically delivered oridonin in AML cells improved AML cells killing ability of oridonin. Meanwhile, it did not show any non-specific toxicity on CD33 negative cells. In summary, we developed a novel AML targeting ADC with clinical application potential, and therefore provided a new solution for the druggability improvement of oridonin.
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Affiliation(s)
- Hui Feng
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yi Liu
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Mengyao Zhang
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Ruimin Liu
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Jincheng Wang
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Wenjuan Wang
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Pengcheng He
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
| | - Penghui Zhang
- Institute of Basic Medicine and Cancer, Chinese Academy of Sciences, Hangzhou, China.
| | - Fan Niu
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
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Zheng Y, Niu F, Jiang P, Zhu X, Lin J, Wu X, Qin L, Liu Z, Fang S, Jin C, Yu X, Zuo L. 1039P Efficacy and safety of surufatinib (HMPL-012) as a third-line or further treatment for advanced non-small cell lung cancer (NSCLC). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1165] [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: 11/01/2022] Open
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Wang X, Niu F, Ren J, He P. 18F-FDG PET/CT for the detection of extensive bone relapse in acute lymphoblastic leukemia with TCF3-PBX1 fusion after hematopoietic stem cell transplantation. Quant Imaging Med Surg 2022; 12:4002-4004. [DOI: 10.21037/qims-22-19] [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] [Received: 01/07/2022] [Accepted: 04/02/2022] [Indexed: 11/06/2022]
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Ma B, Feng H, Feng C, Liu Y, Zhang H, Wang J, Wang W, He P, Niu F. Kill Two Birds with One Stone: A Multifunctional Dual-Targeting Protein Drug to Overcome Imatinib Resistance in Philadelphia Chromosome-Positive Leukemia. Adv Sci (Weinh) 2022; 9:e2104850. [PMID: 35239999 PMCID: PMC9069375 DOI: 10.1002/advs.202104850] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 01/26/2022] [Indexed: 06/07/2023]
Abstract
The Bcr/Abl plays a central role in Philadelphia chromosome-positive (Ph+) leukemia because of the constitutively activated Abl tyrosine kinase and its downstream pathways. Currently, the clinical treatment of imatinib-resistant patients with tyrosine kinase inhibitors is severely limited by drug resistance and adverse effects. Herein, a dual-targeting proteolysis-targeting chimera (PROTAC) protein drug, termed PMI Bcr/Abl-R6, is designed by engrafting an MDM2/p53 inhibition peptide sequence onto the Bcr/Abl tetramerization domain. PMI Bcr/Abl-R6, harboring a Bcr/Abl targeting sequence and an MDM2 binding sequence, acts as a PROTAC drug in Ph+ leukemia cells. Its dual-targeting constitution suggests that PMI Bcr/Abl-R6 designs to target the tetramerization domain instead of the Abl kinase domain, therefore has the potential to overcome drug resistance mutations in the kinase domain. The efficient ability of PMI Bcr/Abl-R6 is demonstrated to simultaneously induce Bcr/Abl degradation and activate the p53 pathway. PMI Bcr/Abl-R6 has the potential to overcome drug resistance in Ph+ leukemias by multiple mechanisms.
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Affiliation(s)
- Bohan Ma
- Department of UrologyThe First Affiliated HospitalXi'an Jiaotong UniversityXi'an710061China
| | - Hui Feng
- Department of HematologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710061China
| | - Chao Feng
- Department of EndocrinologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710061China
| | - Yi Liu
- Department of HematologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710061China
| | - Hailing Zhang
- Department of HematologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710061China
| | - Jincheng Wang
- Department of HematologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710061China
| | - Wenjuan Wang
- Department of HematologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710061China
| | - Pengcheng He
- Department of HematologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710061China
| | - Fan Niu
- Department of HematologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710061China
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Meng Y, Cai B, Lan Q, Niu F, Zhang X, Yang Y. Synthesis and Structural Characterization of a Di-nuclear Uranyl Complex with Quinoline-6-carboxylate. CRYSTALLOGR REP+ 2022. [DOI: 10.1134/s1063774522020092] [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: 11/23/2022]
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13
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Li Y, Zhang Y, Wei K, He J, Ding N, Hua J, Zhou T, Niu F, Zhou G, Shi T, Zhang L, Liu Y. Review: Effect of Gut Microbiota and Its Metabolite SCFAs on Radiation-Induced Intestinal Injury. Front Cell Infect Microbiol 2021; 11:577236. [PMID: 34307184 PMCID: PMC8300561 DOI: 10.3389/fcimb.2021.577236] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [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: 07/01/2020] [Accepted: 06/23/2021] [Indexed: 12/12/2022] Open
Abstract
Gut microbiota is regarded as the second human genome and forgotten organ, which is symbiotic with the human host and cannot live and exist alone. The gut microbiota performs multiple physiological functions and plays a pivotal role in host health and intestinal homeostasis. However, the gut microbiota can always be affected by various factors and among them, it is radiotherapy that results in gut microbiota 12dysbiosis and it is often embodied in a decrease in the abundance and diversity of gut microbiota, an increase in harmful bacteria and a decrease in beneficial bacteria, thereby affecting many disease states, especially intestine diseases. Furthermore, gut microbiota can produce a variety of metabolites, among which short-chain fatty acids (SCFAs) are one of the most abundant and important metabolites. More importantly, SCFAs can be identified as second messengers to promote signal transduction and affect the occurrence and development of diseases. Radiotherapy can lead to the alterations of SCFAs-producing bacteria and cause changes in SCFAs, which is associated with a variety of diseases such as radiation-induced intestinal injury. However, the specific mechanism of its occurrence is not yet clear. Therefore, this review intends to emphasize the alterations of gut microbiota after radiotherapy and highlight the alterations of SCFAs-producing bacteria and SCFAs to explore the mechanisms of radiation-induced intestinal injury from the perspective of gut microbiota and its metabolite SCFAs.
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Affiliation(s)
- Yangyang Li
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment With Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Yiming Zhang
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment With Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Kongxi Wei
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment With Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Jinpeng He
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Nan Ding
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Junrui Hua
- Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Ting Zhou
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment With Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Fan Niu
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment With Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Gucheng Zhou
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment With Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Tongfan Shi
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment With Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China
| | - Liying Zhang
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment With Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China.,Gansu Institute of Cardiovascular Diseases, Lanzhou, China
| | - Yongqi Liu
- Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and The Prevention and Treatment With Traditional Chinese Medicine Research in Gansu Colleges and Universities, Gansu University of Chinese Medicine, Lanzhou, China.,Key Laboratory of Dunhuang Medicine and Transformation at Provincial and Ministerial Level, Lanzhou, China
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Zhang C, Zou Y, Zhu Y, Liu Y, Feng H, Niu F, He P, Liu H. Three Immune-Related Prognostic mRNAs as Therapeutic Targets for Pancreatic Cancer. Front Med (Lausanne) 2021; 8:649326. [PMID: 33869254 PMCID: PMC8047149 DOI: 10.3389/fmed.2021.649326] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 01/04/2021] [Accepted: 03/10/2021] [Indexed: 12/13/2022] Open
Abstract
Objective: Pancreatic cancer is a highly lethal malignancy globally. This study aimed to probe and validate immune-related prognostic mRNAs as therapeutic targets for pancreatic cancer. Methods: Gene transcriptome data of pancreatic cancer and normal pancreas were retrieved from TCGA-GTEx projects. Two thousand four hundred and ninety-eight immune-related genes were obtained from the IMMUPORT database. Abnormally expressed immune-related genes were then identified. Under univariate and multivariate cox models, a gene signature was constructed. Its predictive efficacy was assessed via ROCs. The interactions between the 21 genes were analyzed by Spearson analysis and PPI network. Using the GEPIA and The Human Protein Atlas databases, their expression and prognostic value were evaluated. The TIMER database was utilized to determine the relationships between MET, OAS1, and OASL mRNAs and immune infiltrates. Finally, their mRNA expression was externally verified in the GSE15471 and GSE62452 datasets. Results: An immune-related 21-gene signature was developed for predicting patients' prognosis. Following verification, this signature exhibited the well predictive performance. There were physical and functional interactions between them. MET, OAS1, and OASL mRNAs were all up-regulated in pancreatic cancer and associated with unfavorable prognosis. They showed strong correlations with tumor progression. Furthermore, the three mRNAs were distinctly associated with immune infiltrates. Their up-regulation was confirmed in the two external datasets. Conclusion: These findings identified three immune-related prognostic mRNAs MET, OAS1, and OASL, which may assist clinicians to choose targets for immunotherapy and make personalized treatment strategy for pancreatic cancer patients.
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Affiliation(s)
- Cangang Zhang
- Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Yueji Zou
- Department of Imaging, Penglai Traditional Chinese Medicine Hospital, Penglai, China
| | - Yanan Zhu
- Jiangsu ALF Biotechnology Co., Ltd., Nanjing, China
| | - Yi Liu
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Hui Feng
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Fan Niu
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Pengcheng He
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Haibo Liu
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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Liu W, Niu F, Sha H, Liu LD, Lv ZS, Gong WQ, Yan M. Apelin-13/APJ system delays intervertebral disc degeneration by activating the PI3K/AKT signaling pathway. Eur Rev Med Pharmacol Sci 2021; 24:2820-2828. [PMID: 32271399 DOI: 10.26355/eurrev_202003_20643] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To study the effect of Apelin-13/APJ system on intervertebral disc degeneration and its mechanism. PATIENTS AND METHODS This study detected the expression of APJ in human intervertebral disc tissue with varying degrees of degeneration. IL-1β is used to stimulate the degeneration of nucleus pulposus cells. We used recombinant human Apelin-13 and Ala13 to activate and inhibit the APJ receptor, respectively. The inhibitor LY294002 was used to inhibit the PI3K/AKT signaling pathway. We studied the effects of Apelin-13/APJ system on nucleus pulposus cells and its mechanism by Western blot, RT-PCR, and so on. RESULTS APJ is lowly expressed in the nucleus pulposus of patients with a high degree of degeneration. IL-1β stimulates the nucleus pulposus cells and reduces the expression of APJ in nucleus pulposus cells. Recombinant human Apelin-13 reduces the degradation of nucleus pulposus extracellular matrix, promotes proliferation, and reduces the levels of apoptosis and inflammation. In addition, the Apelin-13/APJ system increases the expression of PI3K and AKT and activates the PI3K/AKT signaling pathway. CONCLUSIONS Apelin-13/APJ system activates PI3K/AKT signaling pathway activity, reduces the degradation of nucleus pulposus extracellular matrix, promotes proliferation, and reduces the level of apoptosis and inflammation, thus delaying the degeneration of the intervertebral disc.
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Affiliation(s)
- W Liu
- Department of Spine Surgery, The First Hospital of Jilin University, Changchun, China.
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16
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Pan HR, Dai XC, Qu C, Chen YH, Niu F, Liu ZW, Luo GZ, Li WJ. [A comparative study on the construction methods of animal models of aortic arch dissection]. Zhonghua Yi Xue Za Zhi 2021; 101:647-653. [PMID: 33685047 DOI: 10.3760/cma.j.cn112137-20200629-01991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the effectiveness and safety of different methods to construct animal models of aortic arch dissection (AAD), and explore safe and effective methods for constructing AAD animal models. Methods: Twenty-four healthy mongrel dogs were divided into 4 groups by random number table (n=6). Group A: Venous incision needle high pressure water flow impact method; Group B: Venous incision needle non-high pressure water flow impact method; Group C: Transarterial sheath non-high pressure water flow impact method; Group D: Two-way balloon expansion combined with elastase perfusion method. Imaging examinations were performed immediately and 7 days after operation, aortic tissue biopsy and pathological staining were performed 15 days after operation to observe the formation of AAD. The operation time, aortic blood flow block time, model construction success rate, dissection tear length, postoperative survival rate and survival time of four groups of experimental dogs were collected to compare the effectiveness and safety of different construction methods. Results: There were no significant difference of the gender, age and weight between four groups of experimental dogs (all P>0.05). The operation time of four groups of experimental dogs were (111.6±8.0), (168.0±17.4), (164.4±13.9), (202.8±21.5)min, and the difference was statistically significant (F=39.973, P<0.001). The operation time of group A was significantly lower than group B, C and D (all P<0.001). The aortic blood flow block time of four groups of experimental dogs were (5.2±1.8), (19.6±3.8), (20.6±3.9), and (18.6±3.0) min, and the difference was statistically significant (all P<0.001). The aortic blood flow block time of group A was significantly lower than group B, C and D (F=27.598, P<0.001). The four groups of experimental dogs had 5, 5, 4, and 1 model were successfully constructed, respectively, and the difference was statistically significant (P=0.008). The successful rate of model construction in group A was significantly higher than that in group D (P=0.040). The dissection tear length of four groups were (14.4±3.0), (11.3±4.2), (7.0±2.3), (4.7±0.6) cm,and the difference was statistically significant (F=8.103, P=0.003). The dissection tear length of group A was significantly longer than group C, D (all P<0.05). The postoperative survival time were 15.0(10.0, 15.0), 5.0(3.0, 10.0), 3.5(1.5, 4.8), 10.0(2.8, 15.0) days, and the difference was statistically significant (χ2=7.825,P=0.036). The postoperative survival time of group A was significantly higher than group B, C (all P<0.05). There was no significant difference in the survival rate of the four groups (P=1.000). The pathological staining results showed that the elastic fiber at the tearing point of AAD was destroyed, and the elastic fiber on the outer wall of the false cavity was over-stretched, which was consistent with the pathological changes of aortic dissection. Conclusion: Transvenous incision needle high-pressure water flow impact modeling method is easy to operate. The aortic blood flow block time is short, the dissection tear length is wide, and the postoperative survival time is long, can be used as the preferred method of animal AAD model construction.
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Affiliation(s)
- H R Pan
- Tianjin General Surgery Institute, Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - X C Dai
- Tianjin General Surgery Institute, Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - C Qu
- Tianjin General Surgery Institute, Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Y H Chen
- Tianjin General Surgery Institute, Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - F Niu
- Tianjin General Surgery Institute, Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Z W Liu
- Tianjin General Surgery Institute, Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - G Z Luo
- Tianjin General Surgery Institute, Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - W J Li
- Tianjin General Surgery Institute, Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
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He X, Wang J, You X, Niu F, Fan L, Lv Y. Classification of heroin, methamphetamine, ketamine and their additives by attenuated total reflection-Fourier transform infrared spectroscopy and chemometrics. Spectrochim Acta A Mol Biomol Spectrosc 2020; 241:118665. [PMID: 32683249 DOI: 10.1016/j.saa.2020.118665] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 04/15/2020] [Revised: 06/29/2020] [Accepted: 06/30/2020] [Indexed: 05/28/2023]
Abstract
Drug crime is a prominent issue of concern from pole to pole. In order to seek higher profits, drug gangs often add diluents and adulterants to the drugs to disperse drug products Analysis of these additives would be greatly conducive to determine the origin of drug products for law enforcement departments. A method using attenuated total reflectance-Fourier transform infrared spectroscopy and chemometrics methods to classify the heroin hydrochloride, methamphetamine hydrochloride, ketamine hydrochloride and their five additives (caffeine, phenacetin, starch, glucose, and sucrose), was developed. The Baseline correction, multivariate scatter correction, standard normal variate and Savitzky-Golay algorithm were adopted to pre-process the spectral data. Several supervised pattern recognition methods including decision tree, Bayes discriminant analysis, and support vector machine were considered as algorithms of constructing classifiers. The results reveal that, repetitive and interfering data in original spectrum data could be eliminated by principal component analysis and factor analysis. F-measure, as a comprehensive evaluation index of precision rate and recall rate, was more objective than precision rate and recall rate to reflect the ability of model to distinguish samples. It should be used as one of the indicators to evaluate the model. The CHAID classification tree could be identified as priorities in the decision tree model, while the linear kernel could be considered as the optimal kernel in the support vector machine model. The classification ability of three hydrochloride mixtures based on Bayes discriminant analysis was better than that of another models. Bayes discriminant analysis model was the more useful and practical method for classifying the target drugs of abuse than that of decision trees and support vector machine. The designed approach represents a potentially simple, non-destructive, and rapid method of classifying hydrochloride mixtures.
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Affiliation(s)
- Xinlong He
- School of investigation and forensic science, People's Public Security University of China, Beijing 100038, China
| | - Jifen Wang
- School of investigation and forensic science, People's Public Security University of China, Beijing 100038, China.
| | - Xinwei You
- Cadres Branch Of Personnel & Training Department, Ministry of Public Security of the People's Republic of China, 100740, China
| | - Fan Niu
- Tian 'anmen branch of Beijing Municipal Public Security Bureau, Beijing 100006, China
| | - Linyuan Fan
- School of investigation and forensic science, People's Public Security University of China, Beijing 100038, China
| | - Yufan Lv
- Institute of Forensic Science, Ministry of Public Security, Beijing 100038, China
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He X, Wang J, Niu F, Fan L, Teng X, Zhang C, He X. Characterization of Heroin and Its Additives by Attenuated Total Reflection (ATR) – Fourier Transform Infrared Spectroscopy (FTIR) and Multivariate Analysis. ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1751181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Xinlong He
- School of Investigation and Forensic Science, People’s Public Security University of China, Beijing, China
| | - Jifen Wang
- School of Investigation and Forensic Science, People’s Public Security University of China, Beijing, China
| | - Fan Niu
- Tian ‘anmen Branch of Beijing Municipal Public Security Bureau, Beijing, China
| | - Linyuan Fan
- School of Investigation and Forensic Science, People’s Public Security University of China, Beijing, China
| | - Xuewei Teng
- School of Investigation and Forensic Science, People’s Public Security University of China, Beijing, China
| | - Chuyue Zhang
- School of Investigation and Forensic Science, People’s Public Security University of China, Beijing, China
| | - Xinyu He
- School of Investigation and Forensic Science, People’s Public Security University of China, Beijing, China
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Yu Y, Zhang Y, Wu J, Sun Y, Xiong Z, Niu F, Lei L, Du S, Chen P, Yang Z. Genetic polymorphisms in IL1B predict susceptibility to steroid-induced osteonecrosis of the femoral head in Chinese Han population. Osteoporos Int 2019; 30:871-877. [PMID: 30852631 DOI: 10.1007/s00198-019-04835-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 01/02/2019] [Indexed: 01/23/2023]
Abstract
UNLABELLED The purpose of this research was to examine if the IL1B gene polymorphism has impact on the risk of steroid-induced ONFH in Chinese population. We found that IL1B rs1143630 decreased the SANFH's risk and IL1B rs2853550 increased the risk of steroid-induced ONFH. So, we guess that IL1B gene influences the genetic susceptibility of steroid-induced ONFH. INTRODUCTION Genetic polymorphisms in IL1B gene could be related in the pathogenesis of osteonecrosis. Discusses on the relationship between the IL1B gene and steroid-induced osteonecrosis of the femoral head (steroid-induced ONFH) is still less in Chinese Han population. So, in this research, we want to examine whether the IL1B gene polymorphism has impact on the risk of steroid-induced ONFH in Chinese population. METHODS A total of 286 steroid-induced ONFH patients and 441 controls were recruited, and seven SNPs (rs2853550, rs1143643, rs3136558, rs1143630, rs1143627, rs16944, and rs1143623) in IL1B gene were selected; unconditional logistic regression analysis was used to research the influence on the risk of steroid-induced ONFH. Functional annotations of IL1B variants were performed by RegulomeDB and HaploReg. RESULTS rs1143630 (A>C) in the IL1B gene decreased the risk of steroid-induced ONFH in the allele model (OR = 0.69, 95%CI 0.51-0.93, p = 0.014). Further genetic model analyses found that IL1B rs2853550 AG genotype increased the risk of steroid-induced ONFH compared with the people who are carriers of the IL1B rs2853550 GG genotype (OR = 1.69, 95%CI 1.16-2.46, p = 0.012). In the dominant model, IL1B rs1143630 GG-GT genotype decreased the risk of steroid-induced ONFH (OR = 0.62, 95%CI 0.44-0.87, p = 0.0051). And further haplotype analysis was performed, while the result was not significant. Using RegulomeDB and HaploReg, rs2853550 is likely to affect TF binding, any motif and DNase peak. CONCLUSIONS We guess that IL1B gene influences the genetic susceptibility of steroid-induced ONFH.
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Affiliation(s)
- Y Yu
- Department of Clinical Laboratory, HongHui Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, 710054, Shaanxi, China
| | - Y Zhang
- Department of Orthopedics, Suizhou Hospital, Hubei University Of Medicine, Suizhou, 441300, Hubei, China
| | - J Wu
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, School of Life Sciences, Northwest University, Xi'an, 710069, Shaanxi, China
| | - Y Sun
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, School of Life Sciences, Northwest University, Xi'an, 710069, Shaanxi, China
| | - Z Xiong
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, School of Life Sciences, Northwest University, Xi'an, 710069, Shaanxi, China
| | - F Niu
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, School of Life Sciences, Northwest University, Xi'an, 710069, Shaanxi, China
| | - L Lei
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, School of Life Sciences, Northwest University, Xi'an, 710069, Shaanxi, China
| | - S Du
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, School of Life Sciences, Northwest University, Xi'an, 710069, Shaanxi, China
| | - P Chen
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, School of Life Sciences, Northwest University, Xi'an, 710069, Shaanxi, China
| | - Z Yang
- Department of Osteonecrosis and Joint Reconstruction Ward, HongHui Affiliated Hospital of Xi'an Jiaotong University College of Medicine, #555 Youyi East Road, Xi'an, 710054, Shaanxi, China.
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Li X, Tolbert WD, Hu HG, Gohain N, Zou Y, Niu F, He WX, Yuan W, Su JC, Pazgier M, Lu W. Dithiocarbamate-inspired side chain stapling chemistry for peptide drug design. Chem Sci 2018; 10:1522-1530. [PMID: 30809370 PMCID: PMC6357863 DOI: 10.1039/c8sc03275k] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [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: 07/24/2018] [Accepted: 11/23/2018] [Indexed: 02/06/2023] Open
Abstract
A novel peptide stapling strategy based on the dithiocarbamate chemistry linking the side chains of residues Lys(i) and Cys(i + 4) of unprotected peptides is developed.
Two major pharmacological hurdles severely limit the widespread use of small peptides as therapeutics: poor proteolytic stability and membrane permeability. Importantly, low aqueous solubility also impedes the development of peptides for clinical use. Various elaborate side chain stapling chemistries have been developed for α-helical peptides to circumvent this problem, with considerable success in spite of inevitable limitations. Here we report a novel peptide stapling strategy based on the dithiocarbamate chemistry linking the side chains of residues Lys(i) and Cys(i + 4) of unprotected peptides and apply it to a series of dodecameric peptide antagonists of the p53-inhibitory oncogenic proteins MDM2 and MDMX. Crystallographic studies of peptide–MDM2/MDMX complexes structurally validated the chemoselectivity of the dithiocarbamate staple bridging Lys and Cys at (i, i + 4) positions. One dithiocarbamate-stapled PMI derivative, DTCPMI, showed a 50-fold stronger binding to MDM2 and MDMX than its linear counterpart. Importantly, in contrast to PMI and its linear derivatives, the DTCPMI peptide actively traversed the cell membrane and killed HCT116 tumor cells in vitro by activating the tumor suppressor protein p53. Compared with other known stapling techniques, our solution-based DTC stapling chemistry is simple, cost-effective, regio-specific and environmentally friendly, promising an important new tool for the development of peptide therapeutics with improved pharmacological properties including aqueous solubility, proteolytic stability and membrane permeability.
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Affiliation(s)
- Xiang Li
- School of Pharmacy , Second Military Medical University , Shanghai 200433 , China.,Institute of Human Virology and Department of Biochemistry and Molecular Biology , University of Maryland , School of Medicine , Baltimore , MD , USA . ;
| | - W David Tolbert
- Institute of Human Virology and Department of Biochemistry and Molecular Biology , University of Maryland , School of Medicine , Baltimore , MD , USA . ;
| | - Hong-Gang Hu
- School of Pharmacy , Second Military Medical University , Shanghai 200433 , China
| | - Neelakshi Gohain
- Institute of Human Virology and Department of Biochemistry and Molecular Biology , University of Maryland , School of Medicine , Baltimore , MD , USA . ;
| | - Yan Zou
- School of Pharmacy , Second Military Medical University , Shanghai 200433 , China
| | - Fan Niu
- Institute of Human Virology and Department of Biochemistry and Molecular Biology , University of Maryland , School of Medicine , Baltimore , MD , USA . ;
| | - Wang-Xiao He
- Institute of Human Virology and Department of Biochemistry and Molecular Biology , University of Maryland , School of Medicine , Baltimore , MD , USA . ;
| | - Weirong Yuan
- Institute of Human Virology and Department of Biochemistry and Molecular Biology , University of Maryland , School of Medicine , Baltimore , MD , USA . ;
| | - Jia-Can Su
- Changhai Hospital , Second Military Medical University , Shanghai 200433 , China .
| | - Marzena Pazgier
- Institute of Human Virology and Department of Biochemistry and Molecular Biology , University of Maryland , School of Medicine , Baltimore , MD , USA . ;
| | - Wuyuan Lu
- Institute of Human Virology and Department of Biochemistry and Molecular Biology , University of Maryland , School of Medicine , Baltimore , MD , USA . ;
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He W, Yan J, Jiang W, Li S, Qu Y, Niu F, Yan Y, Sui F, Wang S, Zhou Y, Jin L, Li Y, Ji M, Ma PX, Liu M, Lu W, Hou P. Peptide-Induced Self-Assembly of Therapeutics into a Well-Defined Nanoshell with Tumor-Triggered Shape and Charge Switch. Chem Mater 2018; 30:7034-7046. [PMID: 32982042 PMCID: PMC7518337 DOI: 10.1021/acs.chemmater.8b02572] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Peptide-tuned self-assembly of macromolecular agents (>500 Da) such as therapeutic peptides offers a strategy to improve the properties and biofunctions of degradable nanomaterials, but the tough requirement of macromolecular therapeutics delivery and a lack of understanding of peptide-based self-assembly design present high barriers for their applications. Herein, we developed a new strategy for nanoengineering macromolecular drugs by an elaborate peptide, termed PSP (VVVVVHHRGDC), capable of directly conjugating with cargo to be a PSP-cargo monomer as building block tending to self-assemble into a well-defined nanoshell with tumor-triggered shape and charge switch. As a proof of concept, conjugation PSP to a D-peptide activator of tumor suppressor p53 termed DPMI (1492.5 Da) generated hollow spheres ~80 nm in diameter named PSP-DPMI that disintegrated only in the acidic microenvironment of tumor tissues, followed by integrin-mediated cellular uptake of PSP-DPMI monomers. Importantly, PSP-based self-assembly successfully endowed the DPMI with long circulation time and high cancer-cell-specific intracellular accumulation. PSP-DPMI nanoshells potently inhibited tumor growth in vitro and in vivo by the p53 restoration, while maintaining a highly favorable in vivo safety profile. Out of conventional encapsulation and conjugation, our study showcases a clinically viable novel method to nanoengineer macromolecular agents such as peptide for anticancer therapy and provides a hazard-free alternative strategy for the theranostics delivery.
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Affiliation(s)
- Wangxiao He
- Center for Translational Medicine, Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
- Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
- Institute of Human Virology and Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
| | - Jin Yan
- Department of Biologic and Materials Sciences, Department of Biomedical Engineering, Macromolecular Science and Engineering Center, Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
| | - Wei Jiang
- Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Shichao Li
- Center for Translational Medicine, Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| | - Yiping Qu
- Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Fan Niu
- Center for Translational Medicine, Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
- Institute of Human Virology and Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
| | - Yuwei Yan
- Center for Translational Medicine, Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| | - Fang Sui
- Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Simeng Wang
- Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Yi Zhou
- Department of Infectious Diseases, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Liang Jin
- Department of Infectious Diseases, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Yujun Li
- Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Meiju Ji
- Center for Translational Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Peter X. Ma
- Department of Biologic and Materials Sciences, Department of Biomedical Engineering, Macromolecular Science and Engineering Center, Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Min Liu
- Department of Infectious Diseases, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Wuyuan Lu
- Institute of Human Virology and Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
| | - Peng Hou
- Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
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Yan J, He W, Yan S, Niu F, Liu T, Ma B, Shao Y, Yan Y, Yang G, Lu W, Du Y, Lei B, Ma PX. Self-Assembled Peptide-Lanthanide Nanoclusters for Safe Tumor Therapy: Overcoming and Utilizing Biological Barriers to Peptide Drug Delivery. ACS Nano 2018; 12:2017-2026. [PMID: 29376322 DOI: 10.1021/acsnano.8b00081] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [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
Developing a sophisticated nanomedicine platform to deliver therapeutics effectively and safely into tumor/cancer cells remains challenging in the field of nanomedicine. In particular, reliable peptide drug delivery systems capable of overcoming biological barriers are still lacking. Here, we developed a simple, rapid, and robust strategy to manufacture nanoclusters of ∼90 nm in diameter that are self-assembled from lanthanide-doped nanoparticles (5 nm), two anticancer peptides with different targets (BIM and PMI), and one cyclic peptide iNGR targeted to cancer cells. The peptide-lanthanide nanoclusters (LDC-PMI-BIM-iNGR) enhanced the resistance of peptide drugs to proteolysis, disassembled in response to reductive conditions that are present in the tumor microenvironment and inhibited cancer cell growth in vitro and in vivo. Notably, LDC-PMI-BIM-iNGR exhibited extremely low systemic toxicity and side effects in vivo. Thus, the peptide-lanthanide nanocluster may serve as an ideal multifunctional platform for safe, targeted, and efficient peptide drug delivery in cancer therapy.
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Affiliation(s)
| | - Wangxiao He
- Institute of Human Virology and Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | | | | | | | | | | | | | - Guang Yang
- Department of Oncology, BenQ Medical Center, Nanjing Medical University , Nanjing 210029, China
| | - Wuyuan Lu
- Institute of Human Virology and Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | | | | | - Peter X Ma
- Department of Biologic and Materials Sciences, Department of Biomedical Engineering, Macromolecular Science and Engineering Center, Department of Materials Science and Engineering, University of Michigan , Ann Arbor, Michigan 48109, United States
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23
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Yang J, Yan H, Niu F, Zhang H. Probing of the magnetic responsive behavior of magnetorheological organogel under step field perturbation. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4249-8] [Citation(s) in RCA: 3] [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] [Indexed: 10/18/2022]
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24
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Zhang HJ, Yu B, Niu F, Liu JF, Chen Y, Jin Q. [Clinical application and observation of injectable modified sodium hyaluronate gel filler for facial cosmetic surgery]. Zhonghua Kou Qiang Yi Xue Za Zhi 2017; 52:194-197. [PMID: 28279059 DOI: 10.3760/cma.j.issn.1002-0098.2017.03.013] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the clinical effect of injectable modified sodium hyaluronate gel filler in the treatment of facial profile modification and rejuvenation. Methods: A total of 125 patients who received facial injection of hyaluronate gel from October 2013 to October 2015 were collected. The patients included 62 cases for rhinoplasty, 28 for chin augmentation, 20 for nasolabial fold correction and 15 for lacrimal groove correction. The post-operation results, satisfaction survey and adverse reaction were observed. Results: All the injected positions improved immediately, and the instant average satisfaction score was 9.3±0.7, followed by 8.1±0.7 after 3 months, 6.9±0.8 after 6 month and 5.2±0.8 after 1 year. Thirty cases exhibited swelling, 5 cases bruised, and they all recovered within one week. Conclusions: Sodium hyaluronate is effective and stable in the treatment of facial contour modification and rejuvenation.
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Affiliation(s)
- H J Zhang
- The Six Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Beijing 100144, China
| | - B Yu
- The Six Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Beijing 100144, China
| | - F Niu
- The Six Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Beijing 100144, China
| | - J F Liu
- The Six Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Beijing 100144, China
| | - Y Chen
- The Six Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Beijing 100144, China
| | - Q Jin
- The Six Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Beijing 100144, China
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25
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Niu F, Ma Q, Liu NR, Chen JH, Ren J. [Clinical value of bendopnea in chronic heart failure patients with reduced left ventricular ejection fraction]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 45:126-129. [PMID: 28260318 DOI: 10.3760/cma.j.issn.0253-3758.2017.02.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Objective: To explore the clinical value of bendopnea in chronic heart failure patients with reduced ejection fraction (HFrEF). Methods: According to the existence of bendopnea or not, a total of 192 consecutive chronic heart failure patients with HFrEF admitted to our department from January 2014 to January 2016 were divided into the bendopnea group and non-bendopnea group. Subgroup analysis was performed in the subgroups with various bendopnea symptoms appearance time (0-10 s, 11-20 s and 21-30 s). The relationship between bendopnea and left ventricular ejection fraction (LVEF), 6-minute walking distance (6-MWD), NT-proBNP and NYHA classification were analyzed. Results: Bendopnea was confirmed in 74 out of 192 (38.54%) cases with HFrEF, and the average time of symptoms appearance was (8.62±2.29) s. LVEF and 6-MWD values were significantly lower in the bendopnea group than those in the non-bendopnea group (both P<0.05). The NT-proBNP level and the prevalence of patients with NYHA grade Ⅳ were significantly higher in the bendopnea group than those in the non-bendopnea group (both P<0.05). There were significant difference on LVEF, 6-MWD, NT-proBNP and patients with NYHA grade Ⅳ in bendopnea patients with various bendopnea symptoms appearance time (all P<0.05) and shorter bendopnea symptoms appearance time was related to severe symptoms and signs of chronic heart failure. Conclusion: The incidence rate of bendopnea is high in patients with HFrEF, and which is related closely to the cardiac function and shorter bendopnea symptoms appearance time is related to severe symptoms and signs of chronic heart failure in HFrEF patients.
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Affiliation(s)
- F Niu
- Department of Cardiology, Ninty-first Hospital of People's Liberation Army, Jiaozuo 454003, China
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26
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Ke D, Niu F, Zhao N, Deng W, Zhong W, Zhou Q, Wu YL. 552P Genome characteristics of stage I lung adenocarcinoma associated with distinct progression patterns. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00710-9] [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: 10/22/2022] Open
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27
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Ke E, Niu F, Zhao N, Deng W, Zhong W, Zhou Q, Wu YL. 552P Genome characteristics of stage I lung adenocarcinoma associated with distinct progression patterns. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw601.003] [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: 11/14/2022] Open
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28
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Luan X, Wang S, Huang Y, Hou W, Ma L, Liu N, Zhao S, Niu F, Han Y, Liu Z, Yuan S. 18F-ALF-NOTA-PRGD2 Positron Emission Tomography/Computed Tomography May Predict Short-term Outcome of Concurrent Chemoradiation Therapy in Patients With Locally Advanced Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1751] [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: 10/20/2022]
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29
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Yang T, Niu F, Li LX, Xia ZN, Zhang Y, You ZL. Synthesis, characterization, crystal structures, and antimicrobial activity of cobalt(II) and iron(III) complexes derived from N'-(2-hydroxybenzylidene)-3-methylbenzohydrazide. RUSS J COORD CHEM+ 2016. [DOI: 10.1134/s1070328416050109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Cao CW, Sun LL, Niu F, Liu P, Chu D, Wang ZY. Effects of phenol on metabolic activities and transcription profiles of cytochrome P450 enzymes in Chironomus kiinensis larvae. Bull Entomol Res 2016; 106:73-80. [PMID: 26494514 DOI: 10.1017/s0007485315000826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 06/05/2023]
Abstract
Phenol, also known as carbolic acid or phenic acid, is a priority pollutant in aquatic ecosystems. The present study has investigated metabolic activities and transcription profiles of cytochrome P450 enzymes in Chironomus kiinensis under phenol stress. Exposure of C. kiinensis larvae to three sublethal doses of phenol (1, 10 and 100 µM) inhibited cytochrome P450 enzyme activity during the 96 h exposure period. The P450 activity measured after the 24 h exposure to phenol stress could be used to assess the level (low or high) of phenol contamination in the environment. To investigate the potential of cytochrome P450 genes as molecular biomarkers to monitor phenol contamination, the cDNA of ten CYP6 genes from the transcriptome of C. kiinensis were identified and sequenced. The open reading frames of the CYP6 genes ranged from 1266 to 1587 bp, encoding deduced polypeptides composed of between 421 and 528 amino acids, with predicted molecular masses from 49.01 to 61.94 kDa and isoelectric points (PI) from 6.01 to 8.89. Among the CYP6 genes, the mRNA expression levels of the CYP6EW3, CYP6EV9, CYP6FV1 and CYP6FV2 genes significantly altered in response to phenol exposure; therefore, these genes could potentially serve as biomarkers in the environment. This study shows that P450 activity combined with one or multiple CYP6 genes could be used to monitor phenol pollution.
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Affiliation(s)
- C W Cao
- School of Forestry,Northeast Forestry University,Harbin,China
| | - L L Sun
- School of Forestry,Northeast Forestry University,Harbin,China
| | - F Niu
- School of Forestry,Northeast Forestry University,Harbin,China
| | - P Liu
- School of Forestry,Northeast Forestry University,Harbin,China
| | - D Chu
- School of Forestry,Northeast Forestry University,Harbin,China
| | - Z Y Wang
- School of Forestry,Northeast Forestry University,Harbin,China
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Magnan R, Escrieut C, Gigoux V, De K, Clerc P, Niu F, Azema J, Masri B, Cordomi A, Baltas M, Tikhonova IG, Fourmy D. Distinct CCK-2 receptor conformations associated with β-arrestin-2 recruitment or phospholipase-C activation revealed by a biased antagonist. J Am Chem Soc 2013; 135:2560-73. [PMID: 23323542 DOI: 10.1021/ja308784w] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Seven-transmembrane receptors (7TMRs), also termed G protein-coupled receptors (GPCRs), form the largest class of cell surface membrane receptors, involving several hundred members in the human genome. Nearly 30% of marketed pharmacological agents target 7TMRs. 7TMRs adopt multiple conformations upon agonist binding. Biased agonists, in contrast to non-biased agonists, are believed to stabilize conformations preferentially activating either G-protein- or β-arrestin-dependent signaling pathways. However, proof that cognate conformations of receptors display structural differences within their binding site where biased agonism initiates, are still lacking. Here, we show that a non-biased agonist, cholecystokinin (CCK) induces conformational states of the CCK2R activating Gq-protein-dependent pathway (CCK2R(G)) or recruiting β-arrestin2 (CCK2R(β)) that are pharmacologically and structurally distinct. Two structurally unrelated antagonists competitively inhibited both pathways. A third ligand (GV150013X) acted as a high affinity competitive antagonist on CCK2R(G) but was nearly inefficient as inhibitor of CCK2R(β). Several structural elements on both GV150013X and in CCK2R binding cavity, which hinder binding of GV150013X only to the CCK2R(β) were identified. At last, proximity between two conserved amino acids from transmembrane helices 3 and 7 interacting through sulfur-aromatic interaction was shown to be crucial for selective stabilization of the CCK2R(β) state. These data establish structural evidence for distinct conformations of a 7TMR associated with β-arrestin-2 recruitment or G-protein coupling and validate relevance of the design of biased ligands able to selectively target each functional conformation of 7TMRs.
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Affiliation(s)
- Rémi Magnan
- EA 4552, Université de Toulouse 3, 31432 Toulouse, France
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Li J, Lin H, Zhu X, Li L, Wang X, Sun W, Wu X, Liu A, Niu F, Wang Y, Liu Y. Association study of functional polymorphisms in serotonin transporter gene with temporal lobe epilepsy in Han Chinese population. Eur J Neurol 2011; 19:351-3. [DOI: 10.1111/j.1468-1331.2011.03521.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [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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33
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Haque R, Inzhakova G, Shi JM, Chung J, Niu F, Cheetham CT. The new generation of combined hormone contraceptives and risk of gynecologic cancers. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.1571] [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: 11/20/2022] Open
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34
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Zhang G, Niu F, Busse HJ, Ma X, Liu W, Dong M, Feng H, An L, Cheng G. Hymenobacter psychrotolerans sp. nov., isolated from the Qinghai--Tibet Plateau permafrost region. Int J Syst Evol Microbiol 2008; 58:1215-20. [DOI: 10.1099/ijs.0.65588-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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35
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Gui L, Song T, Zhang Z, Huang L, Niu F, Jin J, Yu B. O.302 Analysis and strategies for unfavourable cases of prominent mandibular angles osteotomy. J Craniomaxillofac Surg 2006. [DOI: 10.1016/s1010-5182(06)60329-6] [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: 10/23/2022] Open
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36
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Gui L, Zhuo F, Zhang Z, Xia D, Niu F, Jin J, Yu B, Luo J. O.188 Individualized titanium implant for skull defects: A study of 36 cases. J Craniomaxillofac Surg 2006. [DOI: 10.1016/s1010-5182(06)60215-1] [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: 11/25/2022] Open
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37
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Niu F, Huang CX, Jiang H, Yang B, Guo WL, Chen YX, Jin CR, Liu ZM. [Effects of amiodarone versus sotalol in treatment of atrial fibrillation: a random controlled clinical study]. Zhonghua Yi Xue Za Zhi 2006; 86:121-3. [PMID: 16620720] [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: 05/08/2023]
Abstract
OBJECTIVE To evaluate the effects and adverse reactions of amiodarone and sotalol in treatment of atrial fibrillation. METHODS One hundred and two patients with atrial fibrillation, 56 males and 46 females, aged 56 +/- 11, were randomized into 2 equal groups: amiodarone group, taking amiodarone 600 mg/d for 7 days, 400 mg/d for 7 days, 200 mg/d for 7 days, and then 200 mg/d as maintenance dosage if conversion to sinus rhythm occurred; and sotalol group, taking sotalol 40-80 mg/d for one week, 160 mg/d for 2 weeks and then 40-80 mg/d as maintenance dosage if conversion to sinus rhythm occurred. If the cardiac rhythm failed to be converted to sinus rhythm after three week the medication was stopped. All the patients were followed up for 12-24 months and therapeutic effects were evaluated by echocardiography, electrocardiogram and Holter monitor. RESULTS (1) Conversion to sinus rhythm occurred in 40 patients in the amiodarone group with an effective rate of 78.4%, and in 36 patients in the sotalol group with an effective rate of 70.6%. (2) Conversion to sinus rhythm occurred in the first week in 34 patients of the amiodarone group and in 10 patients of the sotalol group. (3) 67.5% of the patients with conversion to sinus rhythm in the amiodarone group and 41.7% of the patients with conversion to sinus rhythm in the sotalol group maintained sinus rhythm in the following 12 months; and 44.4% patients with conversion to sinus rhythm in the amiodarone group and 26.7% of the patients with conversion to sinus rhythm in the following 24 months. (4) 10 patients in the sotalol group taking a maintenance dosage of 80 mg/d showed atrial ventricular block and severe bradycardia during the follow-up of 6-2 months, then the medication was stopped, but there was no severe arrhythmia in amiodarone group. (5) It was difficult to maintain sinus rhythm when atrial fibrillation lasting longer than 12 months was a predictive factor of failure to maintain sinus rhythm. CONCLUSION There is no significant difference between amiodarone and sotalol in converting atrial fibrillation to sinus rhythm. However, amiodarone is more effective in maintenance of sinus rhythm than sotalol. The adverse reaction of amiodarone on heart is less severe than that of sotalol.
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Affiliation(s)
- Fan Niu
- Department of Cardiology People's Hospital of Wuhan University, Wuhan 430060, China
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Hu J, Pavel I, Moigno D, Wumaier M, Kiefer W, Chen Z, Ye Y, Wu Q, Huang Q, Chen S, Niu F, Gu Y. Fourier-transform Raman and infrared spectroscopic analysis of 2-nitro-tetraphenylporphyrin and metallo-2-nitro-tetraphenylporphyrins. Spectrochim Acta A Mol Biomol Spectrosc 2003; 59:1929-1935. [PMID: 12788447 DOI: 10.1016/s1386-1425(02)00279-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The Fourier-transform Raman (FT-Raman) and infrared (FT-IR) spectra of 2-nitro-tetraphenylporphyrin (2-NO(2)-TPP), nickel-2-nitro-tetraphenylporphyrin (Ni-2-NO(2)-TPP), zinc-2-nitro-tetraphenylporphyrin (Zn-2-NO(2)-TPP) and copper-2-nitro-tetraphenylporphyrin (Cu-2-NO(2)-TPP) were acquired for the first time and carefully assigned and discussed. The effects of a beta-NO(2) group and the influence of the central metal on the molecular symmetry and vibrational spectra of the porphyrin macrocycle were also examined. The bands at 1323-1339, 1516-1526 and 961-971 cm(-1) were attributed to the symmetric and asymmetric stretching vibration of the NO(2) group and to the stretching vibration of the C(beta)-N bond, respectively, which connects the NO(2) group with the beta-carbon of the porphyrin macrocycle. These bands can act as a marker to distinguish beta-NO(2) TPPs from other beta-substituent TPPs. Cu-2-NO(2)-TPP has a C(4nu) molecular symmetry, which is different from those of Ni-2-NO(2)-TPP and Zn-2-NO(2)-TPP, i.e. D(4h).
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Affiliation(s)
- J Hu
- College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, China.
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Hu J, Wang T, Moigno D, Wumaier M, Kiefer W, Mao J, Wu Q, Niu F, Gu Y, Chen Q, Ma J, Feng H. Fourier-transform Raman and infrared spectroscopic analysis of dipyrrinones and mesobilirubins. Spectrochim Acta A Mol Biomol Spectrosc 2001; 57:2737-2743. [PMID: 11789874 DOI: 10.1016/s1386-1425(01)00468-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The Fourier-transform Raman (FT-Raman), infrared (FT-IR), and UV-visible absorption spectra of four dipyrrinones and two mesobilirubins have been investigated in the solid state and in CH2Cl2 solutions. A detailed spectral analysis, assignment and discussion of these spectra are presented. The bands at 1735-1738, 1691-1707 and 1359-1377 cm(-1) which were assigned to the stretching vibrations of the C-O-C and C-O-H and symmetric deformation of C-H bonds, respectively, can act as a marker to distinguish the compounds of this class. The striking differences between the spectra of the compounds suggest that mesobilirubin XIIIalpha is tending to adopt as ridge-tile conformation, rather than linear conformation.
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Affiliation(s)
- J Hu
- Department of Analysis-Measurement Science, Wuhan University, People's Republic of China.
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Abstract
Knowledge of the seismic velocity structure at the top of the Earth's inner core is important for deciphering the physical processes responsible for inner-core growth. Previous global seismic studies have focused on structures found 100 km or deeper within the inner core, with results for the uppermost 100 km available for only isolated regions. Here we present constraints on seismic velocity variations just beneath the inner-core boundary, determined from the difference in travel time between waves reflected at the inner-core boundary and those transmitted through the inner core. We found that these travel-time residuals-observed on both global seismograph stations and several regional seismic networks-are systematically larger, by about 0.8 s, for waves that sample the 'eastern hemisphere' of the inner core (40 degrees E to 180 degrees E) compared to those that sample the 'western hemisphere' (180 degrees W to 40 degrees E). These residuals show no correlation with the angle at which the waves traverse the inner core; this indicates that seismic anisotropy is not strong in this region and that the isotropic seismic velocity of the eastern hemisphere is about 0.8% higher than that of the western hemisphere.
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Affiliation(s)
- F Niu
- Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road NW, Washington DC 20015, USA.
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Wang H, Qian B, Niu F, Jiang A. [Changes of genomic density polymorphism and quantitative expression of complement receptor type 1 in patients with liver diseases]. Zhonghua Gan Zang Bing Za Zhi 2000; 8:335-7. [PMID: 11135688] [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: 02/18/2023]
Abstract
OBJECTIVE To study the changes of genomic density polymorphism and quantitative expression of complement receptor type 1 (CR1) on erythrocytes in patients with liver diseases. METHODS Polymerase chain reaction (PCR) and Hind III restriction enzyme digestion and the quantitative assay of erythrocytic CR1 were used. RESULTS The spot mutation rate (25.0% approximately 30.3%) of erythrocyte CR1 density gene in patients with liver diseases was not significantly different with that of healthy individuals (28.0%). The amount of erythrocytic CR1 in patients with liver diseases, except for those with normal liver function, was significantly lower than that of healthy individuals (t=10.44, P<0.0001). The quantitative expression of erythrocytic CR1 in decompensated cirrhosis was obviously lower than that of compensated cirrhosis (t=2.21, P<0.05). CONCLUSION Defective expression of CR1 in liver diseases is acquired through central and/or peripheral mechanisms. It is very important to study the quantitative expression in the evaluation of the development of liver diseases.
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Affiliation(s)
- H Wang
- Department of Immunology, Changhai Hospital, The Second Military Medical University, Shanghai 200433, China
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Hu J, Moigno D, Kiefer W, Ma J, Chen Q, Wang C, Feng H, Shen J, Niu F, Gu Y. Fourier-transform Raman and infrared spectroscopic analysis of novel biliverdin compounds. Spectrochim Acta A Mol Biomol Spectrosc 2000; 56A:2365-2372. [PMID: 11075676 DOI: 10.1016/s1386-1425(00)00285-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The vibrational spectroscopy of novel biliverdin compounds were studied by Fourier-transform Raman (FT-Raman) and infrared (FT-IR) spectroscopy. The effects of type, length and position of substituents at C(8) and C(12) or C(1) and C(19) of tetrapyrroles on FT-Raman and FT-IR spectra of these compounds, are discussed. The marker bands are developed in order to distinguish between etiobiliverdin and mesobiliverdin.
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Affiliation(s)
- J Hu
- Department of Analysis Measurement Science, Wuhan University, People's Republic of China.
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Peng GX, Niu F. [Treatment of dentin hypersensitiveness with MZ type pulse YAG laser]. Shanghai Kou Qiang Yi Xue 1999; 8:2563-256. [PMID: 15048236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Affiliation(s)
- G X Peng
- Stomatological Hospital of Hefei City. Hefei 230001, Anhui province, China
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Niu F, Wang R, Lu G. Determination of the sign of a dislocation in a ZnTe crystal by convergent-beam electron diffraction. Acta Crystallogr A 1991. [DOI: 10.1107/s0108767390009795] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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