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An K, Fan J, Lin B, Han Y. A lysosome-targeted fluorescent probe for fluorescence imaging of hypochlorous acid in living cells and in vivo. Spectrochim Acta A Mol Biomol Spectrosc 2024; 316:124316. [PMID: 38669982 DOI: 10.1016/j.saa.2024.124316] [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] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 04/15/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024]
Abstract
Lysosomes, as crucial acidic organelles in cells, play a significant role in cellular functions. The levels and distribution of hypochlorous acid (HOCl) within lysosomes can profoundly impact their biological functionality. Hence, real-time monitoring of the concentration of HOCl in lysosomes holds paramount importance for further understanding various physiological and pathological processes associated with lysosomes. In this study, we developed a bodipy-based fluorescent probe derived from pyridine and phenyl selenide for the specific detection of HOCl in aqueous solutions. Leveraging the probe's sensitive photoinduced electron transfer effect from phenyl selenide to the fluorophore, the probe exhibited satisfactory high sensitivity (with a limit of detection of 5.2 nM and a response time of 15 s) to hypochlorous acid. Further biological experiments confirmed that the introduction of the pyridine moiety enabled the probe molecule to selectively target lysosomes. Moreover, the probe successfully facilitated real-time monitoring of HOCl in cell models stimulated by N-acetylcysteine (NAC) and lipopolysaccharide (LPS), as well as in a normal zebrafish model. This provides a universal method for dynamically sensing HOCl in lysosomes.
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Affiliation(s)
- Ke An
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jiaxin Fan
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Bin Lin
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yifeng Han
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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An K, Yang X, Luo M, Yan J, Xu P, Zhang H, Li Y, Wu S, Warshel A, Bai C. Mechanistic study of the transmission pattern of the SARS-CoV-2 omicron variant. Proteins 2024; 92:705-719. [PMID: 38183172 PMCID: PMC11059747 DOI: 10.1002/prot.26663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/25/2023] [Accepted: 12/27/2023] [Indexed: 01/07/2024]
Abstract
The omicron variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) characterized by 30 mutations in its spike protein, has rapidly spread worldwide since November 2021, significantly exacerbating the ongoing COVID-19 pandemic. In order to investigate the relationship between these mutations and the variant's high transmissibility, we conducted a systematic analysis of the mutational effect on spike-angiotensin-converting enzyme-2 (ACE2) interactions and explored the structural/energy correlation of key mutations, utilizing a reliable coarse-grained model. Our study extended beyond the receptor-binding domain (RBD) of spike trimer through comprehensive modeling of the full-length spike trimer rather than just the RBD. Our free-energy calculation revealed that the enhanced binding affinity between the spike protein and the ACE2 receptor is correlated with the increased structural stability of the isolated spike protein, thus explaining the omicron variant's heightened transmissibility. The conclusion was supported by our experimental analyses involving the expression and purification of the full-length spike trimer. Furthermore, the energy decomposition analysis established those electrostatic interactions make major contributions to this effect. We categorized the mutations into four groups and established an analytical framework that can be employed in studying future mutations. Additionally, our calculations rationalized the reduced affinity of the omicron variant towards most available therapeutic neutralizing antibodies, when compared with the wild type. By providing concrete experimental data and offering a solid explanation, this study contributes to a better understanding of the relationship between theories and observations and lays the foundation for future investigations.
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Affiliation(s)
- Ke An
- School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P. R. China
- Warshel Institute for Computational Biology
- Chenzhu (MoMeD) Biotechnology Co., Ltd, Hangzhou, Zhejiang, 310005, P.R. China
| | - Xianzhi Yang
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University (Luohu Hospital Group), Shenzhen 518000, China
| | - Mengqi Luo
- College of Management, Shenzhen University, Shenzhen, 518060, China
| | - Junfang Yan
- School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P. R. China
- Warshel Institute for Computational Biology
| | - Peiyi Xu
- School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P. R. China
- Warshel Institute for Computational Biology
| | - Honghui Zhang
- School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P. R. China
- Warshel Institute for Computational Biology
| | - Yuqing Li
- Department of Urology, South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Song Wu
- Department of Urology, South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Arieh Warshel
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-1062, United States
| | - Chen Bai
- School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P. R. China
- Warshel Institute for Computational Biology
- Chenzhu (MoMeD) Biotechnology Co., Ltd, Hangzhou, Zhejiang, 310005, P.R. China
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Zhu X, Luo M, An K, Shi D, Hou T, Warshel A, Bai C. Exploring the activation mechanism of metabotropic glutamate receptor 2. Proc Natl Acad Sci U S A 2024; 121:e2401079121. [PMID: 38739800 DOI: 10.1073/pnas.2401079121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 04/12/2024] [Indexed: 05/16/2024] Open
Abstract
Homomeric dimerization of metabotropic glutamate receptors (mGlus) is essential for the modulation of their functions and represents a promising avenue for the development of novel therapeutic approaches to address central nervous system diseases. Yet, the scarcity of detailed molecular and energetic data on mGlu2 impedes our in-depth comprehension of their activation process. Here, we employ computational simulation methods to elucidate the activation process and key events associated with the mGlu2, including a detailed analysis of its conformational transitions, the binding of agonists, Gi protein coupling, and the guanosine diphosphate (GDP) release. Our results demonstrate that the activation of mGlu2 is a stepwise process and several energy barriers need to be overcome. Moreover, we also identify the rate-determining step of the mGlu2's transition from the agonist-bound state to its active state. From the perspective of free-energy analysis, we find that the conformational dynamics of mGlu2's subunit follow coupled rather than discrete, independent actions. Asymmetric dimerization is critical for receptor activation. Our calculation results are consistent with the observation of cross-linking and fluorescent-labeled blot experiments, thus illustrating the reliability of our calculations. Besides, we also identify potential key residues in the Gi protein binding position on mGlu2, mGlu2 dimer's TM6-TM6 interface, and Gi α5 helix by the change of energy barriers after mutation. The implications of our findings could lead to a more comprehensive grasp of class C G protein-coupled receptor activation.
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Affiliation(s)
- Xiaohong Zhu
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, People's Republic of China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Mengqi Luo
- College of Management, Shenzhen University, Shenzhen 518060, People's Republic of China
| | - Ke An
- Chenzhu (MoMeD) Biotechnology Co., Ltd, Hangzhou, Zhejiang 310005, People's Republic of China
| | - Danfeng Shi
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, People's Republic of China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Tingjun Hou
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Arieh Warshel
- Department of Chemistry, University of Southern California, Los Angeles, CA 90089-1062
| | - Chen Bai
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, People's Republic of China
- Chenzhu (MoMeD) Biotechnology Co., Ltd, Hangzhou, Zhejiang 310005, People's Republic of China
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Luo X, Yu S, Liu B, Zheng Q, Zhou X, An K, Zhong J, Wu L, Dai H, Qi Z, Xia J. Determination of Maximum Tolerable Cold Ischemia Time in a Mouse Model of Cervical Heterotopic Uterus Transplantation. Transplantation 2024:00007890-990000000-00693. [PMID: 38499504 DOI: 10.1097/tp.0000000000004979] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
BACKGROUND Uterus transplantation (UTx) is an emerging treatment for uterine factor infertility. Determining the maximum tolerable cold ischemia time is crucial for successful UTx. However, the limit for cold ischemia in the uterus is unclear. This study aimed to examine cold ischemia's effects on mouse uteri and identify the maximum cold ischemia duration that uteri can endure. METHODS We systematically assessed the tolerance of mouse uteri to extended cold ischemia, 24 h, 36 h, and 48 h, using the cervical heterotopic UTx model. Multiple indicators were used to evaluate ischemia-reperfusion injury, including reperfusion duration, macroscopic examination, oxidative stress, inflammation, and histopathology. The function of transplants was evaluated through estrous cycle monitoring and embryo transfer. RESULTS Mouse uteri subjected to 48 h of cold ischemia exhibited significant delays and insufficiencies in reperfusion, substantial tissue necrosis, and loss of the estrous cycle. Conversely, uteri that underwent cold ischemia within 36 h showed long survival, regular estrous cycles, and fertility. CONCLUSIONS Our study demonstrated that mouse uteri can endure at least 36 h of cold ischemia, extending the known limits for cold ischemia and providing a pivotal reference for research on the prevention and treatment of cold ischemic injury in UTx.
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Affiliation(s)
- Xin Luo
- School of Medicine, Guangxi University, Nanning, Guangxi, P. R. China
| | - Shengnan Yu
- Xiamen Key Laboratory of Regeneration Medicine, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, Organ Transplantation Institute, School of Medicine, Xiamen University, Xiamen, Fujian, P. R. China
| | - Bing Liu
- School of Medicine, Guangxi University, Nanning, Guangxi, P. R. China
| | - Qisheng Zheng
- Xiamen Key Laboratory of Regeneration Medicine, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, Organ Transplantation Institute, School of Medicine, Xiamen University, Xiamen, Fujian, P. R. China
| | - Xin Zhou
- Xiamen Key Laboratory of Regeneration Medicine, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, Organ Transplantation Institute, School of Medicine, Xiamen University, Xiamen, Fujian, P. R. China
| | - Ke An
- Department of Physiology, Xuzhou Medical University, Xuzhou, Jiangsu, P. R. China
| | - Jiaying Zhong
- Xiamen Key Laboratory of Regeneration Medicine, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, Organ Transplantation Institute, School of Medicine, Xiamen University, Xiamen, Fujian, P. R. China
| | - Licheng Wu
- School of Medicine, Xiamen University, Xiamen, Fujian, P. R. China
| | - Helong Dai
- Department of Kidney Transplantation, Center of Organ Transplantation, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, P. R. China
| | - Zhongquan Qi
- School of Medicine, Guangxi University, Nanning, Guangxi, P. R. China
| | - Junjie Xia
- Xiamen Key Laboratory of Regeneration Medicine, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, Organ Transplantation Institute, School of Medicine, Xiamen University, Xiamen, Fujian, P. R. China
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Yu C, Lin K, Zhang Q, Zhu H, An K, Chen Y, Yu D, Li T, Fu X, Yu Q, You L, Kuang X, Cao Y, Li Q, Deng J, Xing X. An isotropic zero thermal expansion alloy with super-high toughness. Nat Commun 2024; 15:2252. [PMID: 38480744 PMCID: PMC10937970 DOI: 10.1038/s41467-024-46613-0] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 03/04/2024] [Indexed: 03/17/2024] Open
Abstract
Zero thermal expansion (ZTE) alloys with high mechanical response are crucial for their practical usage. Yet, unifying the ZTE behavior and mechanical response in one material is a grand obstacle, especially in multicomponent ZTE alloys. Herein, we report a near isotropic zero thermal expansion (αl = 1.10 × 10-6 K-1, 260-310 K) in the natural heterogeneous LaFe54Co3.5Si3.35 alloy, which exhibits a super-high toughness of 277.8 ± 14.7 J cm-3. Chemical partition, in the dual-phase structure, assumes the role of not only modulating thermal expansion through magnetic interaction but also enhancing mechanical properties via interface bonding. The comprehensive analysis reveals that the hierarchically synergistic enhancement among lattice, phase interface, and heterogeneous structure is significant for strong toughness. Our findings pave the way to tailor thermal expansion and obtain prominent mechanical properties in multicomponent alloys, which is essential to ultra-stable functional materials.
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Affiliation(s)
- Chengyi Yu
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Kun Lin
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Qinghua Zhang
- Institution of Physics, Chinese Academic of Science, No.8, 3rd South Street, Zhongguancun Haidian District, Beijing, 100190, P. R. China
| | - Huihui Zhu
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Ke An
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Yan Chen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Dunji Yu
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Tianyi Li
- X-Ray Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Xiaoqian Fu
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, China
| | - Qian Yu
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, China
| | - Li You
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xiaojun Kuang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, P. R. China
| | - Yili Cao
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Qiang Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jinxia Deng
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xianran Xing
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China.
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Gao Z, Wan Z, Yu P, Shang Y, Zhu G, Jiang H, Chen Y, Wang S, Lei F, Huang W, Zeng Q, Wang Y, Rong W, Hong Y, Gao Q, Niu P, Zhai Z, An K, Ding C, Wang Y, Gu G, Wang X, Meng Q, Ye S, Liu H, Gu J. A recurrence-predictive model based on eight genes and tumor mutational burden/microsatellite instability status in Stage II/III colorectal cancer. Cancer Med 2024; 13:e6720. [PMID: 38111983 PMCID: PMC10807589 DOI: 10.1002/cam4.6720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 06/18/2023] [Accepted: 10/27/2023] [Indexed: 12/20/2023] Open
Abstract
BACKGROUND Although adjuvant chemotherapy (ACT) is widely used to treat patients with Stage II/III colorectal cancer (CRC), administering ACT to specific patients remains a challenge. The decision to ACT requires an accurate assessment of recurrence risk and absolute treatment benefit. However, the traditional TNM staging system does not accurately assess a patient's individual risk of recurrence. METHODS To identify recurrence risk-related genetic factors for Stage II/III CRC patients after radical surgery, we conducted an analysis of whole-exome sequencing of 47 patients with Stage II/III CRC who underwent radical surgery at five institutions. Patients were grouped into non-recurrence group (NR, n = 24, recurrence-free survival [RFS] > 5 years) and recurrence group (R, n = 23, RFS <2 years). The TCGA-COAD/READ cohort was employed as the validation dataset. RESULTS A recurrence-predictive model (G8plus score) based on eight gene (CUL9, PCDHA12, HECTD3, DCX, SMARCA2, FAM193A, AATK, and SORCS2) mutations and tumor mutation burden/microsatellite instability (TMB/MSI) status was constructed, with 97.87% accuracy in our data and 100% negative predictive value in the TCGA-COAD/READ cohort. For the TCGA-COAD/READ cohort, the G8plus-high group had better RFS (HR = 0.22, p = 0.024); the G8plus-high tumors had significantly more infiltrated immune cell types, higher tertiary lymphoid structure signature scores, and higher immunological signature scores. The G8plus score was also a predict biomarker for immunotherapeutic in advanced CRC in the PUCH cohort. CONCLUSIONS In conclusion, the G8plus score is a powerful biomarker for predicting the risk of recurrence in patients with stage II/III CRC. It can be used to stratify patients who benefit from ACT and immunotherapy.
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Affiliation(s)
- Zhaoya Gao
- Department of General SurgeryPeking University First HospitalBeijingChina
| | - Zhiyi Wan
- Genecast Biotechnology Co., Ltd.Wuxi CityJiangsu ProvinceChina
| | - Pengfei Yu
- Department of General SurgeryAir Force Medical Center, Chinese People's Liberation ArmyBeijingChina
| | - Yan Shang
- Department of Colorectal SurgeryCancer Hospital of China Medical University, Liaoning Cancer Hospital and InstituteShenyangLiaoning ProvinceChina
| | - Guangsheng Zhu
- Department of Gastrointestinal SurgeryHubei Cancer HospitalWuhanHubei ProvinceChina
| | - Huiyuan Jiang
- Department of Colorectal and Anal SurgeryShanxi Province Cancer Hospital/ Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences/Cancer Hospital Affiliated to Shanxi Medical UniversityTaiyuanShanxi ProvinceChina
| | - Yawei Chen
- Genecast Biotechnology Co., Ltd.Wuxi CityJiangsu ProvinceChina
| | - Shengzhou Wang
- Genecast Biotechnology Co., Ltd.Wuxi CityJiangsu ProvinceChina
| | - Fuming Lei
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Wensheng Huang
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Qingmin Zeng
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Yanzhao Wang
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Wanshui Rong
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Yuming Hong
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Qingkun Gao
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Pengfei Niu
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Zhichao Zhai
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Ke An
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Changmin Ding
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Yunfan Wang
- Department of PathologyPeking University Shougang HospitalBeijingChina
| | - Guoli Gu
- Department of General SurgeryAir Force Medical Center, Chinese People's Liberation ArmyBeijingChina
| | - Xin Wang
- Department of General SurgeryPeking University First HospitalBeijingChina
| | - Qingkai Meng
- Department of Colorectal SurgeryCancer Hospital of China Medical University, Liaoning Cancer Hospital and InstituteShenyangLiaoning ProvinceChina
| | - Shengwei Ye
- Department of Gastrointestinal SurgeryHubei Cancer HospitalWuhanHubei ProvinceChina
| | - Haiyi Liu
- Department of Colorectal and Anal SurgeryShanxi Province Cancer Hospital/ Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences/Cancer Hospital Affiliated to Shanxi Medical UniversityTaiyuanShanxi ProvinceChina
| | - Jin Gu
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal SurgeryPeking University Cancer Hospital & InstituteBeijingChina
- Peking‐Tsinghua Center for Life SciencesPeking UniversityBeijingChina
- Peking University International Cancer InstituteBeijingChina
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Li X, Peng Z, An K, Xue M, Wang Z, Xia J, Qi Z, Shu X. Temsirolimus is a promising immunomodulatory agent for enhanced transplantation outcomes. Transpl Immunol 2023; 81:101952. [PMID: 37918580 DOI: 10.1016/j.trim.2023.101952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/30/2023] [Accepted: 10/30/2023] [Indexed: 11/04/2023]
Abstract
BACKGROUND Identifying effective immunosuppressive strategies is critical for addressing immunological rejection following organ transplantation. This study explores the potential immunosuppressive effects and mechanisms of temsirolimus, a rapamycin derivative, in organ transplantation. METHODS A mouse cardiac allograft model was established using a cervical cannula technique with BALB/c donors and C57BL/6 recipients. Mice were administered temsirolimus intragastrically and graft survival was evaluated. Histological staining was used to assess pathological changes. The BrdU assay was used to measure splenic T cell proliferation. Flow cytometry was used to quantify regulatory T cells (Tregs), CD4+ T cells, and CD8+ T cells. ELISA and qPCR assays were used to determine Foxp3, IL-4, IFN-γ, and TGF-β expression. RESULTS Temsirolimus displayed potent immunosuppressive effects at 20 mg/kg/day, significantly inhibiting T cell proliferation (84.6%, P < 0.0001) and prolonging graft survival (median 49 days vs. 8.5 days in controls, P < 0.0001). However, median survival decreased to 34.5 days upon withdrawal. Temsirolimus also reduced splenic CD4+ and CD8+ T cells (2.85% and 2.92%, P < 0.001) and antibody levels (IgM, IgG1, IgG2) by 11.85-29.09% (P < 0.0001) and increased Tregs, Foxp3, IL-4 (P < 0.01), and TGF-β (P < 0.05), while decreasing IFN-γ (P < 0.001). CONCLUSIONS Temsirolimus exhibited potent immunosuppressive effects, emerging as a strong candidate to mitigate organ transplant rejection.
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Affiliation(s)
- Xianguo Li
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Zuojie Peng
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Ke An
- Department of Physiology, Xuzhou Medical University, Xuzhou 221009, China
| | - Mengjiao Xue
- Division of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Zhenzhen Wang
- Department of Pharmacy, Zhoukou Central Hospital, Zhoukou 466000, China
| | - Junjie Xia
- Organ Transplantation Institute, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, School of Medicine, Xiamen University, Xiamen 361100, China.
| | - Zhongquan Qi
- Medical College of Guangxi University, Guangxi University, Nanning 530004, China.
| | - Xiaogang Shu
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
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Li Y, Xu W, Cui Y, Sun Y, Wang C, Wen Z, An K. Effects of driving pressure-guided ventilation by individualized positive end-expiratory pressure on oxygenation undergoing robot-assisted laparoscopic radical prostatectomy: a randomized controlled clinical trial. J Anesth 2023; 37:896-904. [PMID: 37707572 DOI: 10.1007/s00540-023-03251-y] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 08/27/2023] [Indexed: 09/15/2023]
Abstract
PURPOSE Patients with robot-assisted laparoscopic radical prostatectomy (RALP) need to be placed in Trendelenburg position, which results in cranial displacement of the diaphragm and decreases functional residual capacity and pulmonary compliance. Positive end-expiratory pressure (PEEP) can increase ventilation in the dorsal area, reduce the occurrence of atelectasis and improve oxygenation. However, due to individual differences, inappropriate PEEP will cause lung injury and even hemodynamic instability. Therefore, our study is to evaluate the efficacy of individualized PEEP in RALP. METHODS We randomly recruited 48 patients and divided them into driving pressure-guided individualized PEEP group (P group, individualized PEEP) or traditional lung-protective ventilation strategy group (C group, tidal volume 8 mL/kg combined with PEEP of 5cmH2O). The primary outcome was the PaO2/FiO2 before extubation. The secondary outcomes included individualized PEEP values in the P group, the results of arterial blood gas analysis, respiratory mechanics parameters and vital sign parameters. Other measurements included intraoperative vasoactive drug dosage, length of stay, postoperative SpO2, leukocyte count, temperature, serum inflammatory factors and soluble receptor for advanced glycation end products (sRAGE). RESULTS Individualized PEEP improved the PaO2/FiO2 before extubation (P = 0.034) and decreased driving pressure (P = 0.011). The PEEP valued in the P group was 14 [10-14] cmH2O. The lung compliance of the P group was significantly higher than that in the C group (P = 0.013). There was no significant difference in other measurements. CONCLUSIONS Individualized PEEP could improve PaO2/FiO2 in patients who underwent RALP and do not increase the dosage of intraoperative vasoactive drug and the release of inflammatory factors. TRIAL REGISTRATION www.chictr.org.cn (registration no. ChiCTR2100047271).
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Affiliation(s)
- Youpei Li
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, No 58, Zhongshan 2 Road, Guangzhou, 510080, China
- Department of Anesthesiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Wenwen Xu
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, No 58, Zhongshan 2 Road, Guangzhou, 510080, China
| | - Yingpeng Cui
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yu Sun
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, No 58, Zhongshan 2 Road, Guangzhou, 510080, China
| | - Chao Wang
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, No 58, Zhongshan 2 Road, Guangzhou, 510080, China
| | - Zhishuang Wen
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, No 58, Zhongshan 2 Road, Guangzhou, 510080, China
| | - Ke An
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, No 58, Zhongshan 2 Road, Guangzhou, 510080, China.
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Zhao J, An K, Mao Z, Qu Y, Wang D, Li J, Min Z, Xue Z. CCL5 promotes LFA-1 expression in Th17 cells and induces LCK and ZAP70 activation in a mouse model of Parkinson's disease. Front Aging Neurosci 2023; 15:1250685. [PMID: 38020765 PMCID: PMC10655117 DOI: 10.3389/fnagi.2023.1250685] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023] Open
Abstract
Background Parkinson's disease (PD), which is associated to autoimmune disorders, is characterized by the pathological deposition of alpha-synuclein (α-Syn) and loss of dopaminergic (DA) neurons. Th17 cells are thought to be responsible for the direct loss of DA neurons. C-C chemokine ligand 5 (CCL5) specifically induces Th17 cell infiltration into the SN. However, the specific effect of CCL5 on Th17 cells in PD and the relationship between CCL5 and lymphocyte function-associated antigen-1 (LFA-1) expression in Th17 cells are unknown. Methods We evaluated the effects of CCL5 on LFA-1 expression in Th17 cells in mice treated with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and examined Th17 cell differentiation upon CCL5 stimulation in vitro. Furthermore, we assessed the effects of CCL5 on tyrosine kinase zeta-chain-associated protein kinase 70 (ZAP70) and lymphocyte-specific protein tyrosine kinase (LCK) activity in CCL5-stimulated Th17 cells in vivo and in vitro. Results CCL5 increased the proportion of peripheral Th17 cells in MPTP-treated mice, LFA-1 expression on Th17 cells, and Th17 cell levels in the SN of MPTP-treated mice. CCL5 promoted Th17 cell differentiation and LFA-1 expression in naive T cells in vitro. Moreover, CCL5 increased Th17 cell differentiation and LFA-1 expression by stimulating LCK and ZAP70 activation in naive CD4+ T cells. Inhibiting LCK and ZAP70 activation reduced the proportion of peripheral Th17 cells and LFA-1 surface expression in MPTP-treated mice, and Th17 cell levels in the SN also significantly decreased. Conclusion CCL5, which increased Th17 cell differentiation and LFA-1 protein expression by activating LCK and ZAP70, could increase the Th17 cell number in the SN, induce DA neuron death and aggravate PD.
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Affiliation(s)
| | | | | | | | | | | | - Zhe Min
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zheng Xue
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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10
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Pan Q, Yang M, Feng R, Chuang AC, An K, Liaw PK, Wu X, Tao N, Lu L. Atomic faulting induced exceptional cryogenic strain hardening in gradient cell-structured alloy. Science 2023; 382:185-190. [PMID: 37708297 DOI: 10.1126/science.adj3974] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 09/01/2023] [Indexed: 09/16/2023]
Abstract
Coarse-grained materials are widely accepted to display the highest strain hardening and the best tensile ductility. We experimentally report an attractive strain hardening rate throughout the deformation stage at 77 kelvin in a stable single-phase alloy with gradient dislocation cells that even surpasses its coarse-grained counterparts. Contrary to conventional understanding, the exceptional strain hardening arises from a distinctive dynamic structural refinement mechanism facilitated by the emission and motion of massive multiorientational tiny stacking faults (planar defects), which are fundamentally distinct from the traditional linear dislocation-mediated deformation. The dominance of atomic-scale planar deformation faulting in plastic deformation introduces a different approach for strengthening and hardening metallic materials, offering promising properties and potential applications.
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Affiliation(s)
- Qingsong Pan
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
| | - Muxin Yang
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
| | - Rui Feng
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | | | - Ke An
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Peter K Liaw
- Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996, USA
| | - Xiaolei Wu
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
| | - Nairong Tao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
| | - Lei Lu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
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11
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Gao Z, Wang Y, Zeng Q, Rong W, Wang Z, Zhai Z, Ding C, An K, Gao Q, Niu P, Hong Y, He X, Huang W, Lei F, Wen B, Wang X, Gu J. Perineal defect reconstruction after surgery for advanced or locally recurrent rectal cancer involving organ resection: Multiple flaps combined with lining repair. Colorectal Dis 2023; 25:2087-2092. [PMID: 37612783 DOI: 10.1111/codi.16710] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 08/25/2023]
Abstract
AIM The aim of this study was to investigate the efficacy of multiple perineal perforator flaps in repairing deep perineal defects after pelvic exenteration for locally advanced or recurrent rectal cancer. METHOD We investigated the outcomes of eight patients whose repairs involved a novel method of using an internal pudendal artery perforator (IPAP) flap combined with an inferior gluteal artery perforator (IGAP) flap. RESULTS There were four male and four female patients with a mean age of 56 years (36-72 years). Bilateral IPAP flaps combined with bilateral IGAP flaps were used in five patients, unilateral IPAP flaps combined with bilateral IGAP flaps were used in two patients and bilateral IPAP flaps were used in one patient. There were no functional limitations in daily activities during the 6-month follow-up period. CONCLUSION Our study showed that using multiple perineal perforator flaps combined with lining repair is feasible for repairing deep perineal defects in patients who have undergone rectal cancer surgery that includes pelvic exenteration.
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Affiliation(s)
- Zhaoya Gao
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
- Department of General Surgery, Peking University First Hospital, Beijing, China
| | - Yanzhao Wang
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Qingmin Zeng
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Wanshui Rong
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Zilong Wang
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Zhichao Zhai
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Changmin Ding
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Ke An
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Qingkun Gao
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Pengfei Niu
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Yuming Hong
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Xiaomang He
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Wensheng Huang
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Fuming Lei
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Bing Wen
- Department of Plastic Surgery and Burn, Peking University First Hospital, Beijing, China
| | - Xin Wang
- Department of General Surgery, Peking University First Hospital, Beijing, China
| | - Jin Gu
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
- Department of Gastrointestinal Surgery, Peking University Cancer Hospital, Beijing, China
- Peking University International Cancer Institute, Beijing, China
- Peking-Tsinghua Center for Life Science, Beijing, China
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12
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Wang M, An K, Huang J, Mprah R, Ding H. A novel model based on necroptosis to assess progression for polycystic ovary syndrome and identification of potential therapeutic drugs. Front Endocrinol (Lausanne) 2023; 14:1193992. [PMID: 37745699 PMCID: PMC10517861 DOI: 10.3389/fendo.2023.1193992] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 08/21/2023] [Indexed: 09/26/2023] Open
Abstract
Background Polycystic ovary syndrome (PCOS), a common endocrine and reproductive disorder, lacks precise diagnostic strategies. Necroptosis was found to be crucial in reproductive and endocrine disorders, but its function in PCOS remains unclear. We aimed to identify differentially diagnostic genes for necroptosis (NDDGs), construct a diagnostic model to assess the progression of PCOS and explore the potential therapeutic drugs. Methods Gene expression datasets were combined with weighted gene co-expression network analysis (WGCNA) and necroptosis gene sets to screen the differentially expressed genes for PCOS. Least absolute shrinkage and selection operator (LASSO) regression analysis was used to construct a necroptosis-related gene signatures. Independent risk analyses were performed using nomograms. Pathway enrichment of NDDGs was conducted with the GeneMANIA database and gene set enrichment analysis (GSEA). Immune microenvironment analysis was estimated based on ssGSEA algorithm analysis. The Comparative Toxicogenomics Database (CTD) was used to explore potential therapeutic drugs for NDDGs. The expression of NDDGs was validated in GSE84958, mouse model and clinical samples. Results Four necroptosis-related signature genes, IL33, TNFSF10, BCL2 and PYGM, were identified to define necroptosis for PCOS. The areas under curve (AUC) of receiver operating characteristic curve (ROC) for training set and validation in diagnostic risk model were 0.940 and 0.788, respectively. Enrichment analysis showed that NDDGs were enriched in immune-related signaling pathways such as B cells, T cells, and natural killer cells. Immune microenvironment analysis revealed that NDDGs were significantly correlated with 13 markedly different immune cells. A nomogram was constructed based on features that would benefit patients clinically. Several compounds, such as resveratrol, tretinoin, quercetin, curcumin, etc., were mined as therapeutic drugs for PCOS. The expression of the NDDGs in the validated set, animal model and clinical samples was consistent with the results of the training sets. Conclusion In this study, 4 NDDGs were identified to be highly effective in assessing the progression and prognosis of PCOS and exploring potential targets for PCOS treatment.
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Affiliation(s)
- Mingming Wang
- Department of Physiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Ke An
- Department of Physiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jing Huang
- Department of Medical Informatics Engineering, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Richard Mprah
- Department of Physiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Huanhuan Ding
- Department of Physiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
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13
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Plotkowski A, Saleeby K, Fancher CM, Haley J, Madireddy G, An K, Kannan R, Feldhausen T, Lee Y, Yu D, Leach C, Vaughan J, Babu SS. Operando neutron diffraction reveals mechanisms for controlled strain evolution in 3D printing. Nat Commun 2023; 14:4950. [PMID: 37587109 PMCID: PMC10432395 DOI: 10.1038/s41467-023-40456-x] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 07/28/2023] [Indexed: 08/18/2023] Open
Abstract
Residual stresses affect the performance and reliability of most manufactured goods and are prevalent in casting, welding, and additive manufacturing (AM, 3D printing). Residual stresses are associated with plastic strain gradients accrued due to transient thermal stress. Complex thermal conditions in AM produce similarly complex residual stress patterns. However, measuring real-time effects of processing on stress evolution is not possible with conventional techniques. Here we use operando neutron diffraction to characterize transient phase transformations and lattice strain evolution during AM of a low-temperature transformation steel. Combining diffraction, infrared and simulation data reveals that elastic and plastic strain distributions are controlled by motion of the face-centered cubic and body-centered cubic phase boundary. Our results provide a new pathway to design residual stress states and property distributions within additively manufactured components. These findings will enable control of residual stress distributions for advantages such as improved fatigue life or resistance to stress-corrosion cracking.
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Affiliation(s)
- A Plotkowski
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
| | - K Saleeby
- Manufacturing Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - C M Fancher
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - J Haley
- Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - G Madireddy
- Manufacturing Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - K An
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - R Kannan
- Manufacturing Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - T Feldhausen
- Manufacturing Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Y Lee
- Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - D Yu
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - C Leach
- Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - J Vaughan
- Manufacturing Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - S S Babu
- Manufacturing Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
- Department of Mechanical, Aerospace, and Biomedical Engineering, The University of Tennessee - Knoxville, Knoxville, TN, 37996, USA
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Yang T, An K, Zhang S, Han Y. A new benzo-bodipy based fluorescent probe for the highly sensitive detection of hypochlorous acid and its application in the living cells and zebrafish imaging. Spectrochim Acta A Mol Biomol Spectrosc 2023; 296:122655. [PMID: 36966730 DOI: 10.1016/j.saa.2023.122655] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/13/2023] [Accepted: 03/18/2023] [Indexed: 06/18/2023]
Abstract
Due to the highly significant biological activity of hypochlorous acid, the monitoring of its concentration in vivo has received extensive attention. In this work, a photoinduced electron transfer (PeT) based benzo-bodipy fluorescent probe BBy-T has been developed for the rapid, sensitive, and selective detection of HClO in an aqueous solution. Based on the HClO-specific oxidation reaction, BBy-T exhibited a distinct fluorescence turn-on response to HClO with a remarkable Stokes shift (84 nm), immediate response (less than 20 s), and low detection limit (13.7 nM). In addition, the bioimaging results indicated that the probe BBy-T could be applied to real-time fluorescence imaging of living HeLa cells as well as living zebrafish.
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Affiliation(s)
- Taorui Yang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Ke An
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Shishen Zhang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yifeng Han
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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15
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Shi B, An K, Wang Y, Fei Y, Guo C, Cliff Zhang Q, Yang YG, Tian X, Kan Q. RNA Structural Dynamics Modulate EGFR-TKI Resistance Through Controlling YRDC Translation in NSCLC Cells. Genomics Proteomics Bioinformatics 2023; 21:850-865. [PMID: 36435452 PMCID: PMC10787121 DOI: 10.1016/j.gpb.2022.10.006] [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] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 10/25/2022] [Accepted: 10/31/2022] [Indexed: 11/27/2022]
Abstract
Epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs) positively affect the initial control of non-small cell lung cancer (NSCLC). Rapidly acquired resistance to EGFR-TKIs is a major hurdle in successful treatment. However, the mechanisms that control the resistance of EGFR-TKIs remain largely unknown. RNA structures have widespread and crucial functions in many biological regulations; however, the functions of RNA structures in regulating cancer drug resistance remain unclear. Here, the psoralen analysis of RNA interactions and structures (PARIS) method is used to establish the higher-order RNA structure maps of EGFR-TKIs-resistant and -sensitive cells of NSCLC. Our results show that RNA structural regions are enriched in untranslated regions (UTRs) and correlate with translation efficiency (TE). Moreover, yrdC N6-threonylcarbamoyltransferase domain containing (YRDC) promotes resistance to EGFR-TKIs. RNA structure formation in YRDC 3' UTR suppresses embryonic lethal abnormal vision-like 1 (ELAVL1) binding, leading to EGFR-TKI sensitivity by impairing YRDC translation. A potential therapeutic strategy for cancer treatment is provided using antisense oligonucleotide (ASO) to perturb the interaction between RNA and protein. Our study reveals an unprecedented mechanism through which the RNA structure switch modulates EGFR-TKI resistance by controlling YRDC mRNA translation in an ELAVL1-dependent manner.
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Affiliation(s)
- Boyang Shi
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China
| | - Ke An
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China
| | - Yueqin Wang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China
| | - Yuhan Fei
- MOE Key Laboratory of Bioinformatics, Center for Synthetic and Systems Biology, Beijing Advanced Innovation Center for Structural Biology, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Caixia Guo
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China
| | - Qiangfeng Cliff Zhang
- MOE Key Laboratory of Bioinformatics, Center for Synthetic and Systems Biology, Beijing Advanced Innovation Center for Structural Biology, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Yun-Gui Yang
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China.
| | - Xin Tian
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China.
| | - Quancheng Kan
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China.
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Song D, An K, Zhai W, Feng L, Xu Y, Sun R, Wang Y, Yang YG, Kan Q, Tian X. NSUN2-mediated mRNA m 5C Modification Regulates the Progression of Hepatocellular Carcinoma. Genomics Proteomics Bioinformatics 2023; 21:823-833. [PMID: 36183976 PMCID: PMC10787115 DOI: 10.1016/j.gpb.2022.09.007] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 09/01/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
RNA modifications affect many biological processes and physiological diseases. The 5-methylcytosine (m5C) modification regulates the progression of multiple tumors. However, its characteristics and functions in hepatocellular carcinoma (HCC) remain largely unknown. Here, we found that HCC tissues had a higher m5C methylation level than the adjacent normal tissues. Transcriptome analysis revealed that the hypermethylated genes mainly participated in the phosphokinase signaling pathways, such as the Ras and PI3K-Akt pathways. The m5C methyltransferase NSUN2 was highly expressed in HCC tissues. Interestingly, the expression of many genes was positively correlated with the expression of NSUN2, including GRB2, RNF115, AATF, ADAM15, RTN3, and HDGF. Real-time PCR assays further revealed that the expression of the mRNAs of GRB2, RNF115, and AATF decreased significantly with the down-regulation of NSUN2 expression in HCC cells. Furthermore, NSUN2 could regulate the cellular sensitivity of HCC cells to sorafenib via modulating the Ras signaling pathway. Moreover, knocking down NSUN2 caused cell cycle arrest. Taken together, our study demonstrates the vital role of NSUN2 in the progression of HCC.
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Affiliation(s)
- Dan Song
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China
| | - Ke An
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China
| | - Wenlong Zhai
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Digestive Organ Transplantation of Henan Province, Zhengzhou University, Zhengzhou 450052, China
| | - Luyao Feng
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China
| | - Yingjie Xu
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China
| | - Ran Sun
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China
| | - Yueqin Wang
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China
| | - Yun-Gui Yang
- CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China
| | - Quancheng Kan
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China.
| | - Xin Tian
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou 450052, China.
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An K, Hu J, Wang J. Schottky-barrier-free plasmonic photocatalysts. Phys Chem Chem Phys 2023. [PMID: 37439122 DOI: 10.1039/d3cp01425h] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
Plasmonic photocatalysis has recently attracted much attention in enhancing the solar-to-chemical conversion efficiency (SCCE) owing to localized surface plasmon resonance (LSPR), whose energy can be synthetically varied from the ultraviolet through the visible to the near-infrared region. This wide variability is inaccessible by traditional semiconductor photocatalysts. However, for all-metal plasmonic photocatalysts, the photogenerated hot charge carriers have an ultrashort lifetime because of their rapid recombination. For most metal-semiconductor hybrid plasmonic photocatalysts, a large portion of plasmonic hot charge carriers is lost during transfer from the metal to the semiconductor because of the Schottky barrier formed at the metal-semiconductor interface. As a result, both types of plasmonic photocatalysts exhibit limited SCCEs. To overcome the aforementioned shortcomings, a new type of plasmonic photocatalyst, the Schottky-barrier-free plasmonic photocatalyst, has been proposed recently. This type of plasmonic photocatalyst not only possesses LSPR to generate abundant hot charge carriers, but is also Schottky-barrier-free so that the hot charge carriers can be utilized more sufficiently to drive redox reactions. In this perspective, we first discuss the different types of plasmonic photocatalysts using representative examples, then introduce Schottky-barrier-free plasmonic photocatalysts, and finally provide the major challenges and remaining questions of this new type of plasmonic photocatalyst. We believe this perspective will offer insight into the further development of plasmonic photocatalysis and the improvement of its SCCEs.
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Affiliation(s)
- Ke An
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China.
| | - Jingtian Hu
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China.
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China.
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18
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Gao Q, An K, Gao Z, Wang Y, Ding C, Niu P, Lei F. Rectal cancer-derived exosomes activate the nuclear factor kappa B pathway and lung fibroblasts by delivering integrin beta-1. Korean J Physiol Pharmacol 2023; 27:375-381. [PMID: 37386835 DOI: 10.4196/kjpp.2023.27.4.375] [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] [Received: 02/15/2023] [Revised: 03/29/2023] [Accepted: 04/21/2023] [Indexed: 07/01/2023]
Abstract
Numerous studies have revealed the importance of tumor-derived exosomes in rectal cancer (RC). This study aims to explore the influence of tumor-derived exosomal integrin beta-1 (ITGB1) on lung fibroblasts in RC along with underlying mechanisms. Exosome morphology was observed using a transmission electron microscope. Protein levels of CD63, CD9, ITGB1, p-p65 and p65 were detected using Western blot. To determine ITGB1's mRNA expression, quantitative real-time polymerase chain reaction was used. Moreover, levels of interleukin (IL)-8, IL-1β, and IL-6 in cell culture supernatant were measured via commercial ELISA kits. ITGB1 expression was increased in exosomes from RC cells. The ratio of p-p65/p65 as well as levels of interleukins in lung fibroblasts was raised by exosomes derived from RC cells, while was reduced after down-regulation of exosomal ITGB1. The increased ratio of p-p65/p65 as well as levels of pro-inflammatory cytokines caused by exosomes from RC cells was reversed by the addition of nuclear factor kappa B (NF-κB) inhibitor. We concluded that the knockdown of RC cells-derived exosomal ITGB1 repressed activation of lung fibroblasts and the NF-κB pathway in vitro.
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Affiliation(s)
- Qingkun Gao
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144, China
| | - Ke An
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144, China
| | - Zhaoya Gao
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144, China
| | - Yanzhao Wang
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144, China
| | - Changmin Ding
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144, China
| | - Pengfei Niu
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144, China
| | - Fuming Lei
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144, China
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Gao Q, An K, Lv Z, Wang Y, Ding C, Huang W. E2F3 accelerates the stemness of colon cancer cells by activating the STAT3 pathway. Front Oncol 2023; 13:1203712. [PMID: 37456248 PMCID: PMC10346838 DOI: 10.3389/fonc.2023.1203712] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 06/07/2023] [Indexed: 07/18/2023] Open
Abstract
Introduction Colon cancer is one of the most prevalent malignancies and causes of cancer-related deaths worldwide. Thus, further research is required to explicate the latent molecular mechanisms and look for novel biomarkers. E2F3 has been confirmed to be an oncogene in a variety of cancers. However, the particular regulation of E2F3 in colon cancer needs further investigation. Methods The self-renewal ability was detected through a sphere formation assay. The tumorigenic ability was measured through nude mice in vivo assay. The protein expression of genes was examined through a Western blot. The expression of E2F3 in tumor tissues was detected through an IHC assay. The resistance to cisplatin was assessed through the CCK-8 assay. The cell migration and invasion abilities were measured after upregulating or suppressing E2F3 through the Transwell assay. Results Results uncovered that E2F3 was upregulated in spheroid cells. In addition, E2F3 facilitates stemness in colon cancer. Moreover, E2F3 facilitated colon cancer cell migration and invasion. Finally, it was revealed that E2F3 affected the STAT3 pathway to modulate stemness in colon cancer. E2F3 served as a promoter regulator in colon cancer, aggravating tumorigenesis and stemness in colon cancer progression through the STAT3 pathway. Conclusion E2F3 may be a useful biomarker for anticancer treatment in colon cancer.
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Yu C, Lin K, Chen X, Jiang S, Cao Y, Li W, Chen L, An K, Chen Y, Yu D, Kato K, Zhang Q, Gu L, You L, Kuang X, Wu H, Li Q, Deng J, Xing X. Superior zero thermal expansion dual-phase alloy via boron-migration mediated solid-state reaction. Nat Commun 2023; 14:3135. [PMID: 37253768 DOI: 10.1038/s41467-023-38929-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/22/2023] [Indexed: 06/01/2023] Open
Abstract
Rapid progress in modern technologies demands zero thermal expansion (ZTE) materials with multi-property profiles to withstand harsh service conditions. Thus far, the majority of documented ZTE materials have shortcomings in different aspects that limit their practical utilization. Here, we report on a superior isotropic ZTE alloy with collective properties regarding wide operating temperature windows, high strength-stiffness, and cyclic thermal stability. A boron-migration-mediated solid-state reaction (BMSR) constructs a salient "plum pudding" structure in a dual-phase Er-Fe-B alloy, where the precursor ErFe10 phase reacts with the migrated boron and transforms into the target Er2Fe14B (pudding) and α-Fe phases (plum). The formation of such microstructure helps to eliminate apparent crystallographic texture, tailor and form isotropic ZTE, and simultaneously enhance the strength and toughness of the alloy. These findings suggest a promising design paradigm for comprehensive performance ZTE alloys.
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Affiliation(s)
- Chengyi Yu
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Kun Lin
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Xin Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Suihe Jiang
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yili Cao
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Wenjie Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Liang Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Ke An
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Yan Chen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Dunji Yu
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Kenichi Kato
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-Cho, Sayo-gun, Hyogo, 679-5148, Japan
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Li You
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xiaojun Kuang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, P. R. China
| | - Hui Wu
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899-6102, US
| | - Qiang Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jinxia Deng
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xianran Xing
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China.
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Qu Y, Qin QX, Wang DL, Li JT, Zhao JW, An K, Li JY, Mao ZJ, Min Z, Xiong YJ, Xue Z. Estimated glomerular filtration rate is a biomarker of cognitive impairment in Parkinson's disease. Front Aging Neurosci 2023; 15:1130833. [PMID: 37284018 PMCID: PMC10240071 DOI: 10.3389/fnagi.2023.1130833] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 04/24/2023] [Indexed: 06/08/2023] Open
Abstract
Backgrounds The relationship between kidney function and cognitive impairment in Parkinson's disease (PD) is poorly understood and underexplored. This study aims to explore whether renal indices can serve as indicators to monitor the cognitive impairment of PD. Methods A total of 508 PD patients and 168 healthy controls from the Parkinson's Progression Markers Initiative (PPMI) were recruited, and 486 (95.7%) PD patients underwent longitudinal measurements. The renal indicators including serum creatinine (Scr), uric acid (UA), and urea nitrogen, as well as UA/Scr ratio and estimated glomerular filtration rate (eGFR), were measured. Cross-sectional and longitudinal associations between kidney function and cognitive impairment were evaluated using multivariable-adjusted models. Results eGFR was associated with lower levels of cerebrospinal fluid (CSF) Aβ1-42 (p = 0.0156) and α-synuclein (p = 0.0151) and higher serum NfL (p = 0.0215) in PD patients at baseline. Longitudinal results showed that decreased eGFR predicted a higher risk of cognitive impairment (HR = 0.7382, 95% CI = 0.6329-0.8610). Additionally, eGFR decline was significantly associated with higher rates of increase in CSF T-tau (p = 0.0096), P-tau (p = 0.0250), and serum NfL (p = 0.0189), as well as global cognition and various cognitive domains (p < 0.0500). The reduced UA/Scr ratio was also linked to higher NfL levels (p = 0.0282) and greater accumulation of T-tau (p = 0.0282) and P-tau (p = 0.0317). However, no significant associations were found between other renal indices and cognition. Conclusion eGFR is altered in PD subjects with cognitive impairment, and predict larger progression of cognitive decline. It may assist identifying patients with PD at risk of rapid cognitive decline and have the potential to monitoring responses to therapy in future clinical practice.
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Bi S, Yang T, An K, Zhou B, Han Y. A benzo BODIPY based fluorescent probe for selective visualization of hypochlorous acid in living cells and zebrafish. Spectrochim Acta A Mol Biomol Spectrosc 2023; 299:122860. [PMID: 37201333 DOI: 10.1016/j.saa.2023.122860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/26/2023] [Accepted: 05/09/2023] [Indexed: 05/20/2023]
Abstract
Hypochlorous acid (HOCl) is an essential endogenous reactive oxygen species in biological systems, playing a critical role in various physiological processes. Real-time monitoring of HOCl concentration in living organisms is essential for understanding its biological functions and pathological roles. In this study, we developed a novel fluorescent probe based on benzobodipy, BBDP, for rapid and sensitive detection of HOCl in aqueous solutions. The probe exhibited a significant fluorescence turn-on response to HOCl based on its specific oxidation reaction towards diphenylphosphine, with high selectivity, instantaneous response (less than 10 s), and low detection limit (21.6 nM). Furthermore, bioimaging results illustrated that the probe could be applied for real-time fluorescence imaging of HOCl in live cells and zebrafish. The development of BBDP may provide a new tool for exploring the biological functions of HOCl and its pathological roles in diseases.
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Affiliation(s)
- Sheng Bi
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Taorui Yang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Ke An
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Baocheng Zhou
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yifeng Han
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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Wang Y, Wei J, Feng L, Li O, Huang L, Zhou S, Xu Y, An K, Zhang Y, Chen R, He L, Wang Q, Wang H, Du Y, Liu R, Huang C, Zhang X, Yang YG, Kan Q, Tian X. Aberrant m5C hypermethylation mediates intrinsic resistance to gefitinib through NSUN2/YBX1/QSOX1 axis in EGFR-mutant non-small-cell lung cancer. Mol Cancer 2023; 22:81. [PMID: 37161388 PMCID: PMC10169458 DOI: 10.1186/s12943-023-01780-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 04/21/2023] [Indexed: 05/11/2023] Open
Abstract
BACKGROUND RNA 5-methylcytosine (m5C) modification plays critical roles in the pathogenesis of various tumors. However, the function and molecular mechanism of RNA m5C modification in tumor drug resistance remain unclear. METHODS The correlation between RNA m5C methylation, m5C writer NOP2/Sun RNA methyltransferase family member 2 (NSUN2) and EGFR-TKIs resistance was determined in non-small-cell lung cancer (NSCLC) cell lines and patient samples. The effects of NSUN2 on EGFR-TKIs resistance were investigated by gain- and loss-of-function assays in vitro and in vivo. RNA-sequencing (RNA-seq), RNA bisulfite sequencing (RNA-BisSeq) and m5C methylated RNA immunoprecipitation-qPCR (MeRIP-qPCR) were performed to identify the target gene of NSUN2 involved in EGFR-TKIs resistance. Furthermore, the regulatory mechanism of NSUN2 modulating the target gene expression was investigated by functional rescue and puromycin incorporation assays. RESULTS RNA m5C hypermethylation and NSUN2 were significantly correlated with intrinsic resistance to EGFR-TKIs. Overexpression of NSUN2 resulted in gefitinib resistance and tumor recurrence, while genetic inhibition of NSUN2 led to tumor regression and overcame intrinsic resistance to gefitinib in vitro and in vivo. Integrated RNA-seq and m5C-BisSeq analyses identified quiescin sulfhydryl oxidase 1 (QSOX1) as a potential target of aberrant m5C modification. NSUN2 methylated QSOX1 coding sequence region, leading to enhanced QSOX1 translation through m5C reader Y-box binding protein 1 (YBX1). CONCLUSIONS Our study reveals a critical function of aberrant RNA m5C modification via the NSUN2-YBX1-QSOX1 axis in mediating intrinsic resistance to gefitinib in EGFR-mutant NSCLC.
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Affiliation(s)
- Yueqin Wang
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Jingyao Wei
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Luyao Feng
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Ouwen Li
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Lan Huang
- Biotherapy Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, China
| | - Shaoxuan Zhou
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Yingjie Xu
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Ke An
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Yu Zhang
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Ruiying Chen
- Department of Respiratory Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Lulu He
- Biobank of the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Qiming Wang
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Han Wang
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Yue Du
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Ruijuan Liu
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Chunmin Huang
- Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, China National Center for Bioinformation, Beijing, 100101, China
| | - Xiaojian Zhang
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China
| | - Yun-Gui Yang
- Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, China National Center for Bioinformation, Beijing, 100101, China.
| | - Quancheng Kan
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China.
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China.
| | - Xin Tian
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, No.1 Jianshedong Rd, Zhengzhou, Henan, 450052, China.
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, China.
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Zhang J, Wong D, Zhang Q, Zhang N, Schulz C, Bartkowiak M, An K, Gu L, Hu Z, Liu X. Reducing Co/O Band Overlap through Spin State Modulation for Stabilized High Capability of 4.6 V LiCoO 2. J Am Chem Soc 2023; 145:10208-10219. [PMID: 37098172 DOI: 10.1021/jacs.3c01128] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
High-voltage LiCoO2 (LCO) attracts great interest because of its large specific capacity, but it suffers from oxygen release, structural degradation, and quick capacity drop. These daunting issues root from the inferior thermodynamics and kinetics of the triggered oxygen anion redox (OAR) at high voltages. Herein, a tuned redox mechanism with almost only Co redox is demonstrated by atomically engineered high-spin LCO. The high-spin Co network reduces the Co/O band overlap, eliminates the adverse phase transition of O3 → H1-3, delays the exceeding of the O 2p band over the Fermi level, and suppresses excessive O → Co charge transfer at high voltages. This function intrinsically promotes Co redox and restrains O redox, fundamentally addressing the issues of O2 release and coupled detrimental Co reduction. Moreover, the chemomechanical heterogeneity caused by different kinetics of Co/O redox centers and the inferior rate performance limited by slow O redox kinetics is simultaneously improved owing to the suppression of slow OAR and the excitation of fast Co redox. The modulated LCO delivers ultrahigh rate capacities of 216 mAh g-1 (1C) and 195 mAh g-1(5C), as well as high capacity retentions of 90.4% (@100 cycles) and 86.9% (@500 cycles). This work sheds new light on the design for a wide range of O redox cathodes.
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Affiliation(s)
- Jicheng Zhang
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Deniz Wong
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin D-14109, Germany
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, P. R. China
| | - Nian Zhang
- Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, P. R. China
| | - Christian Schulz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin D-14109, Germany
| | - Maciej Bartkowiak
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin D-14109, Germany
| | - Ke An
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, P. R. China
| | - Zhongbo Hu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiangfeng Liu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, P. R. China
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Zhu X, An K, Yan J, Xu P, Bai C. In Silico Optimization of SARS-CoV-2 Spike Specific Nanobodies. FRONT BIOSCI-LANDMRK 2023; 28:67. [PMID: 37114534 DOI: 10.31083/j.fbl2804067] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 12/01/2022] [Accepted: 12/12/2022] [Indexed: 04/29/2023]
Abstract
BACKGROUND The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread worldwide, caused a global pandemic, and killed millions of people. The spike protein embedded in the viral membrane is essential for recognizing human receptors and invading host cells. Many nanobodies have been designed to block the interaction between spike and other proteins. However, the constantly emerging viral variants limit the effectiveness of these therapeutic nanobodies. Therefore, it is necessary to find a prospective antibody designing and optimization approach to deal with existing or future viral variants. METHODS We attempted to optimize nanobody sequences based on the understanding of molecular details by using computational approaches. First, we employed a coarse-grained (CG) model to learn the energetic mechanism of the spike protein activation. Next, we analyzed the binding modes of several representative nanobodies with the spike protein and identified the key residues on their interfaces. Then, we performed saturated mutagenesis of these key residue sites and employed the CG model to calculate the binding energies. RESULTS Based on analysis of the folding energy of the angiotensin-converting enzyme 2 (ACE2) -spike complex, we constructed a detailed free energy profile of the activation process of the spike protein which provided a clear mechanistic explanation. In addition, by analyzing the results of binding free energy changes following mutations, we determined how the mutations can improve the complementarity with the nanobodies on spike protein. Then we chose 7KSG nanobody as a template for further optimization and designed four potent nanobodies. Finally, based on the results of the single-site saturated mutagenesis in complementarity determining regions (CDRs), combinations of mutations were performed. We designed four novel, potent nanobodies, all exhibiting higher binding affinity to the spike protein than the original ones. CONCLUSIONS These results provide a molecular basis for the interactions between spike protein and antibodies and promote the development of new specific neutralizing nanobodies.
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Affiliation(s)
- Xiaohong Zhu
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, 518172 Shenzhen, Guangdong, China
- School of Chemistry and Materials Science, University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - Ke An
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, 518172 Shenzhen, Guangdong, China
- School of Chemistry and Materials Science, University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - Junfang Yan
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, 518172 Shenzhen, Guangdong, China
| | - Peiyi Xu
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, 518172 Shenzhen, Guangdong, China
| | - Chen Bai
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, 518172 Shenzhen, Guangdong, China
- Chenzhu Biotechnology Co., Ltd., 310005 Hangzhou, Zhejiang, China
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Wu J, An K, Fang DD, Lu J, Hu L, Wang J, Zhang K, Xia Y, Ding C, Chen S, Wei S. Abstract 474: Preclinical development of an oral selective estrogen receptor degrader (SERD) TFX06 for the treatment of ER+HER2− breast cancer. Cancer Res 2023. [DOI: 10.1158/1538-7445.am2023-474] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Abstract
Breast cancer (BC) has recently surpassed lung cancer to become the most commonly diagnosed cancer in women worldwide. Approximately 70% of BC was ER+, in which estrogen receptor α (ERα, encoded by ESR1 gene) drives dysregulated cell proliferation. In clinic, ER+ BC has been effectively treated by endocrine therapy targeting estrogen or ER. As the first approved ERα degrader, fulvestrant has proven to be effective for locally advanced or metastatic BC. However, its clinical utilization is hampered by inconvenience of intramuscular injection, as well as its poor PK/PD profile and limited efficacy, especially in the patient population that developed ESR1 mutation-conferring drug resistance after the earlier line of treatment with an aromatase inhibitor. Thus, developing an oral and more effective therapy for ER+ BC remains an unmet medical need. We report herein discovery and preclinical investigation of a novel orally bioavailable SERD TFX06. TFX06 demonstrated potent binding affinity to ERα with a Ki of 0.10 nM and preferably antagonized ERα to ERβ with an IC50 value of 0.086 nM and 2.83 nM, respectively. TFX06 potently induced ERα degradation in ER+ BC cells and substantially inhibited cell proliferation in BC cell lines with ER wild type (WT), and MCF-7 cells expressing Y537S or D538G mutants. Oral administration of TFX06 demonstrated impressive antitumor efficacy in ER WT (TGI = 101%) and ER D538G-expressing (TGI = 99%) MCF-7 cell line-derived xenograft (CDX) models in mice. Similarly, in an ER+ BC patient-derived xenograft (PDX) model (HCI-013) with ER Y537S mutation, TFX06 also exerted excellent antitumor activity (TGI = 99%). Furthermore, TFX06 in combination with palbociclib achieved synergistic activity in MCF-7 CDX model. Moreover, TFX06 exhibited an excellent correlation between systemic/local drug exposure, pharmacodynamic modulation (i.e., ERα downregulation) and antitumor activity. Collectively, these findings demonstrate that TFX06 is a novel, orally bioavailable SERD. TFX06 demonstrates substantial antitumor activity in both in vitro and in vivo preclinical tumor models, including those expressing ESR1 mutations, through downregulation of ERα. The preclinical data warranted the clinical evaluation of TFX06 in human with an IND application submitted to the China NPMA.
Citation Format: Jinping Wu, Ke An, Douglas D. Fang, Jianyu Lu, Lihong Hu, Jing Wang, Kaili Zhang, Yuanfeng Xia, Charles Ding, Shuhui Chen, Sha Wei. Preclinical development of an oral selective estrogen receptor degrader (SERD) TFX06 for the treatment of ER+HER2− breast cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 474.
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Affiliation(s)
- Jinping Wu
- 1Shenzhen Yangli Pharmaceutical Technology Co., Ltd., Shanghai, China
| | - Ke An
- 2WuXi AppTec Co., Ltd., Wuhan, China
| | - Douglas D. Fang
- 1Shenzhen Yangli Pharmaceutical Technology Co., Ltd., Shanghai, China
| | - Jianyu Lu
- 2WuXi AppTec Co., Ltd., Wuhan, China
| | - Lihong Hu
- 2WuXi AppTec Co., Ltd., Wuhan, China
| | - Jing Wang
- 1Shenzhen Yangli Pharmaceutical Technology Co., Ltd., Shanghai, China
| | | | | | | | | | - Sha Wei
- 1Shenzhen Yangli Pharmaceutical Technology Co., Ltd., Shanghai, China
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Venkatakrishnan S, Fancher CM, Ziatdinov M, Vasudevan RK, Saleeby K, Haley J, Yu D, An K, Plotkowski A. Adaptive Sampling for Accelerating Neutron Diffraction-Based Strain Mapping. Mach Learn : Sci Technol 2023. [DOI: 10.1088/2632-2153/acc512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
Abstract
Neutron diffraction is a useful technique for mapping residual strains in dense metal objects. The technique works by placing an object in the path of a neutron beam, measuring the diffracted signals and inferring the local lattice strain values from the measurement. In order to map the strains across the entire object, the object is stepped one position at a time in the path of the neutron beam, typically in raster order, and at each position a strain value is estimated. Typical dwell times at neutron diffraction instruments result in an overall measurement that can take several hours to map an object that is several tens of centimeters in each dimension at a resolution of a few millimeters, during which the end users do not have an estimate of the global strain features and are at risk of incomplete information in case of instruments outages. In this paper, we propose an object adaptive sampling strategy to measure the significant points first. We start with a small initial uniform set of measurement points across the object to be mapped, compute the strain in those positions and use a machine learning technique to predict the next position to measure in the object. Specifically,we use a Bayesian optimization based on a Gaussian process regression method to infer the underlying strain field from a sparse set of measurements and predict the next most informative positions to measure based on estimates of the mean and variance in the strain fields estimated from the previously measured points. We demonstrate our real-time measure-infer-predict workflow on additively manufactured steel parts- demonstrating that we can get an accurate strain estimate even with 30-40% of the typical number of measurements - leading the path to faster strain mapping with useful real-time feedback. We emphasize that the proposed method is general and can be used for fast mapping of other material properties such as phase fractions from time-consuming point-wise neutron measurements.
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Gao Z, Huang D, Chen H, Yang Y, An K, Ding C, Yuan Z, Zhai Z, Niu P, Gao Q, Cai J, Zeng Q, Wang Y, Hong Y, Rong W, Huang W, Lei F, Wang X, Chen S, Zhao X, Bai Y, Gu J. Development and validation of postoperative circulating tumor DNA combined with clinicopathological risk factors for recurrence prediction in patients with stage I-III colorectal cancer. J Transl Med 2023; 21:63. [PMID: 36717891 PMCID: PMC9887832 DOI: 10.1186/s12967-023-03884-3] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/10/2023] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Circulating tumor DNA (ctDNA) detection following curative-intent surgery could directly reflect the presence of minimal residual disease, the ultimate cause of clinical recurrence. However, ctDNA is not postoperatively detected in ≥ 50% of patients with stage I-III colorectal cancer (CRC) who ultimately recur. Herein we sought to improve recurrence risk prediction by combining ctDNA with clinicopathological risk factors in stage I-III CRC. METHODS Two independent cohorts, both consisting of early-stage CRC patients who underwent curative surgery, were included: (i) the discovery cohort (N = 124) with tumor tissues and postoperative plasmas for ctDNA determination; and (ii) the external validation cohort (N = 125) with available ctDNA results. In the discovery cohort, somatic variations in tumor tissues and plasmas were determined via a 733-gene and 127-gene next-generation sequencing panel, respectively. RESULTS In the discovery cohort, 17 of 108 (15.7%) patients had detectable ctDNA. ctDNA-positive patients had a significantly high recurrence rate (76.5% vs. 16.5%, P < 0.001) and short recurrence-free survival (RFS; P < 0.001) versus ctDNA-negative patients. In addition to ctDNA status, the univariate Cox model identified pathologic stage, lymphovascular invasion, nerve invasion, and preoperative carcinoembryonic antigen level associated with RFS. We combined the ctDNA and clinicopathological risk factors (CTCP) to construct a model for recurrence prediction. A significantly higher recurrence rate (64.7% vs. 8.1%, P < 0.001) and worse RFS (P < 0.001) were seen in the high-risk patients classified by the CTCP model versus those in the low-risk patients. Receiver operating characteristic analysis demonstrated that the CTCP model outperformed ctDNA alone at recurrence prediction, which increased the sensitivity of 2 year RFS from 49.6% by ctDNA alone to 87.5%. Harrell's concordance index, calibration curve, and decision curve analysis also suggested that the CTCP model had good discrimination, consistency, and clinical utility. These results were reproduced in the validation cohort. CONCLUSION Combining postoperative ctDNA and clinical risk may better predict recurrence than ctDNA alone for developing a personalized postoperative management strategy for CRC.
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Affiliation(s)
- Zhaoya Gao
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Dandan Huang
- grid.452694.80000 0004 0644 5625Department of Oncology, Peking University Shougang Hospital, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Hui Chen
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Yong Yang
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Ke An
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Changmin Ding
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Zheping Yuan
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Zhichao Zhai
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Pengfei Niu
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Qingkun Gao
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Jinping Cai
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Qingmin Zeng
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Yanzhao Wang
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Yuming Hong
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Wanshui Rong
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Wensheng Huang
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Fuming Lei
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Xiaodong Wang
- grid.452694.80000 0004 0644 5625Department of Oncology, Peking University Shougang Hospital, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Shiqing Chen
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Xiaochen Zhao
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Yuezong Bai
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Jin Gu
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China. .,Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China. .,Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China. .,Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Surgery, Peking University Cancer Hospital & Institute, Beijing, China. .,Peking University International Cancer Institute, Beijing, China.
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Tan R, You Q, Cui J, Wang M, Song N, An K, Lin L, Adu-Amankwaah J, Yuan J, Sun H. Sodium houttuyfonate against cardiac fibrosis attenuates isoproterenol-induced heart failure by binding to MMP2 and p38. Phytomedicine 2023; 109:154590. [PMID: 36610170 DOI: 10.1016/j.phymed.2022.154590] [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] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 11/17/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Heart failure (HF), caused by stress cardiomyopathy, is a major cause of mortality. Cardiac fibrosis is an essential structural remodeling associated with HF; therefore, preventing cardiac fibrosis is crucial to decelerating the progression of HF. Sodium houttuyfonate (SH), an extract of Houttuynia cordata, has a potent therapeutic effect on hypoxic cardiomyocytes in a myocardial infarction model. PURPOSE To investigate the preventative and therapeutic effects of SH during isoproterenol (ISO)-induced HF and explore the pharmacological mechanism of SH in alleviating HF. METHODS We analyzed the overlapping target genes between SH and cardiac fibrosis or HF using a network pharmacology analytical method. We verified the suppressive effect of SH on ISO-induced proliferation and activation of cardiac fibroblasts by immunohistochemical staining and histological analysis in an isoproterenol-induced HF mouse model. Additionally, we investigated the effect of SH by evaluating fibrosis and cardiac remodeling markers. To further decipher the pharmacological mechanism of SH against cardiac fibrosis and HF, we performed a molecular docking analysis between SH and hub common target genes. RESULTS There were 20 overlapping target genes between SH and cardiac fibrosis and 32 overlapping target genes between SH and HF. The 16 common target genes of SH against cardiac fibrosis and HF included MMP2 (matrix metalloproteinase 2), and p38. SH significantly inhibited the ISO- or TGF-β-induced expression of Col1α (collagen 1), α-SMA (smooth muscle actin), MMP2, TIMP2 (tissue inhibitor of metalloproteinase 2), TGF-β (transforming growth factor), and Smad2 phosphorylation. Moreover, both ISO- and TGF-β-induced p38 phosphorylation was inhibited. Molecular docking analysis showed that SH forms a stable complex with MMP2 and p38. CONCLUSIONS In addition to protecting cardiomyocytes, SH directly inhibits cardiac fibroblast activation and proliferation by binding to MMP2 and p38, subsequently delaying cardiac fibrosis and HF progression. Our prevention- and intervention-based approaches in this study showed that SH inhibited the development of stress cardiomyopathy-mediated cardiac fibrosis and HF when SH was administered before or after the initiation of cardiac stress.
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Affiliation(s)
- Rubin Tan
- Department of Physiology, Basic Medical School, Xuzhou Medical University, Xuzhou 221004, China
| | - Qiang You
- Department of Physiology, Basic Medical School, Xuzhou Medical University, Xuzhou 221004, China; School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Jie Cui
- Department of Physiology, Basic Medical School, Xuzhou Medical University, Xuzhou 221004, China
| | - Mingming Wang
- Department of Physiology, Basic Medical School, Xuzhou Medical University, Xuzhou 221004, China
| | - Nina Song
- Department of Physiology, Basic Medical School, Xuzhou Medical University, Xuzhou 221004, China
| | - Ke An
- Department of Physiology, Basic Medical School, Xuzhou Medical University, Xuzhou 221004, China
| | - Lili Lin
- School of Pharmacy, Xuzhou Medical University, Xuzhou 221004, China
| | - Joseph Adu-Amankwaah
- Department of Physiology, Basic Medical School, Xuzhou Medical University, Xuzhou 221004, China
| | - Jinxiang Yuan
- The Collaborative Innovation Center, Jining Medical University, Jining 272000, China
| | - Hong Sun
- Department of Physiology, Basic Medical School, Xuzhou Medical University, Xuzhou 221004, China.
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An K, Zhu X, Yan J, Xu P, Hu L, Bai C. A systematic study on the binding affinity of SARS-CoV-2 spike protein to antibodies. AIMS Microbiol 2022; 8:595-611. [PMID: 36694585 PMCID: PMC9834082 DOI: 10.3934/microbiol.2022038] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/18/2022] [Accepted: 12/21/2022] [Indexed: 12/29/2022] Open
Abstract
The COVID-19 pandemic has caused a worldwide health crisis and economic recession. Effective prevention and treatment methods are urgently required to control the pandemic. However, the emergence of novel SARS-CoV-2 variants challenges the effectiveness of currently available vaccines and therapeutic antibodies. In this study, through the assessment of binding free energies, we analyzed the mutational effects on the binding affinity of the coronavirus spike protein to neutralizing antibodies, patient-derived antibodies, and artificially designed antibody mimics. We designed a scoring method to assess the immune evasion ability of viral variants. We also evaluated the differences between several targeting sites on the spike protein of antibodies. The results presented herein might prove helpful in the development of more effective therapies in the future.
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Affiliation(s)
- Ke An
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, Guangdong, People's Republic of China,School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xiaohong Zhu
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, Guangdong, People's Republic of China,School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Junfang Yan
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, Guangdong, People's Republic of China
| | - Peiyi Xu
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, Guangdong, People's Republic of China
| | - Linfeng Hu
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, Guangdong, People's Republic of China
| | - Chen Bai
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, Guangdong, People's Republic of China,Chenzhu (MoMeD) Biotechnology Co., Ltd, Hangzhou, Zhejiang, 310005, P.R. China,* Correspondence:
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An K, Zhu X, Bai C. The Nature of Functional Features of Different Classes of G-Protein-Coupled Receptors. Biology (Basel) 2022; 11:biology11121839. [PMID: 36552350 PMCID: PMC9775959 DOI: 10.3390/biology11121839] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/14/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022]
Abstract
G-protein-coupled receptors (GPCRs) are a critical family in the human proteome and are involved in various physiological processes. They are also the most important drug target, with approximately 30% of approved drugs acting on such receptors. The members of the family are divided into six classes based on their structural and functional characteristics. Understanding their structural-functional relationships will benefit us in future drug development. In this article, we investigate the features of protein function, structure, and energy that describe the dynamics of the GPCR activation process between different families. GPCRs straddle the cell membrane and transduce signals from outside the membrane into the cell. During the process, the conformational change in GPCRs that is activated by the binding of signal molecules is essential. During the binding process, different types of signal molecules result in different signal transfer efficiencies. Therefore, the GPCR classes show a variety of structures and activation processes. Based on the experimental crystal structures, we modeled the activation process of the β2 adrenergic receptor (β2AR), glucagon receptor (GCGR), and metabotropic glutamate receptor 2 (mGluR2), which represent class A, B, and C GPCRs, respectively. We calculated their activation free-energy landscapes and analyzed the structure-energy-function relationship. The results show a consistent picture of the activation mechanisms between different types of GPCRs. This could also provide us a way to understand other signal transduction proteins.
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Affiliation(s)
- Ke An
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Xiaohong Zhu
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Chen Bai
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
- Chenzhu (MoMeD) Biotechnology Co., Ltd., Hangzhou 310005, China
- Correspondence:
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Peterson NE, Fancher CM, Frontzek M, Bunn J, Payzant A, An K, Agnew S. Quantitative texture analysis at the WAND 2 and HIDRA diffractometers. J Appl Crystallogr 2022. [DOI: 10.1107/s1600576722009013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Data collection and analysis strategies have been developed for efficient and reliable crystallographic texture measurements at two recently upgraded neutron diffractometers: the Wide Angle Neutron Diffractometer Squared (WAND2) and the High Intensity Diffractometer for Residual Stress Analysis (HIDRA) at the High Flux Isotope Reactor located at Oak Ridge National Laboratory. These methods are demonstrated using measurements on a variety of textured samples, including multi-phase steel composites and polycrystalline calcite (CaCO3). Reference measurements were also made at VULCAN, the engineering diffractometer located at the Spallation Neutron Source. The texture data obtained on the different instruments are in agreement, and WAND2 is more time efficient than HIDRA. Two analysis methods were investigated, single-peak fitting to obtain individual pole figures for inversion and Rietveld texture analysis using MAUD. The impact of the differences between the various textures obtained was evaluated through the calculation of diffraction elastic constants, which is one application of the texture data collected. Both instruments were found to provide texture data that are suitable for complementing other analyses, such as residual stress mapping.
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Xu W, Li Y, Li N, Sun Y, Wang C, An K. Combination of thoracic epidural analgesia with patient-controlled intravenous analgesia versus traditional thoracic epidural analgesia for postoperative analgesia and early recovery of laparotomy: a prospective single-centre, randomized controlled trial. BMC Anesthesiol 2022; 22:341. [PMID: 36344910 PMCID: PMC9639277 DOI: 10.1186/s12871-022-01891-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 10/29/2022] [Indexed: 11/09/2022] Open
Abstract
Background Thoracic epidural analgesia (TEA) has always been the first choice for postoperative pain treatment, but associated complications and contraindications may limit its use. Our study put forward a new analgesic strategy that combines TEA with patient controlled intravenous analgesia (PCIA) to optimize TEA. Methods Patients undergoing laparotomy were enrolled in this prospective randomized study. Patients were randomized to one of two groups: TEA/PCIA group and TEA group. Patients in TEA/PCIA group received TEA in the day of surgery and the first postoperative day and PCIA continued to use until the third postoperative day. Patients in TEA group received TEA for three days postoperatively. Visual analogue scale (VSA) pain scores at rest and on movement at 6, 24,48,72 h after surgery were recorded. In addition, the incidence of inadequate analgesia, adverse events, time to first mobilization, time to pass first flatus, time of oral intake recovery, time of urinary catheter removal, postoperative length of hospital stay, cumulative opioid consumption, and the overall cost were compared between the two groups. We examined VAS pain scores using repeated measures analysis of variance; P < 0.05 was considered as statistically significant. Results Eighty-six patients were analysed (TEA/PCIA = 44, TEA = 42). The mean VAS pain scores at rest and on movement in TEA/PCIA group were lower than TEA group, with a significant difference on movement and 48 h postoperatively (P < 0.05). The time to first mobilization and pass first flatus were shorter in TEA/PCIA group (P < 0.05). Other measurement showed no statistically significant differences. Conclusions The combination of TEA with PCIA for patients undergoing laparotomy, can enhance postoperative pain control and facilitate early recovery without increasing the incidence of adverse effects and overall cost of hospitalization. Trial registration Chinese Clinical Trial Registry(www.chictr.org.cn), ChiCTR 1,800,020,308, 13 December 2018.
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Ji W, An K, Wang C, Wang S. Bioinformatics analysis of diagnostic biomarkers for Alzheimer's disease in peripheral blood based on sex differences and support vector machine algorithm. Hereditas 2022; 159:38. [PMID: 36195955 PMCID: PMC9531459 DOI: 10.1186/s41065-022-00252-x] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 09/22/2022] [Indexed: 11/28/2022] Open
Abstract
Background The prevalence of Alzheimer's disease (AD) varies based on gender. Due to the lack of early stage biomarkers, most of them are diagnosed at the terminal stage. This study aimed to explore sex-specific signaling pathways and identify diagnostic biomarkers of AD. Methods Microarray dataset for blood was obtained from the Gene Expression Omnibus (GEO) database of GSE63060 to conduct differentially expressed genes (DEGs) analysis by R software limma. Gene Ontology (GO) analysis, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis and Gene set enrichment analysis (GSEA) were conducted. Immune checkpoint gene expression was compared between females and males. Using CytoHubba, we identified hub genes in a protein–protein interaction network (PPI). Then, we evaluated their distinct effectiveness using unsupervised hierarchical clustering. Support vector machine (SVM) and ten-fold cross-validation were used to further verify these biomarkers. Lastly, we confirmed our findings by using another independent dataset. Results A total of 37 female-specific DEGs and 27 male-specific DEGs were identified from GSE63060 datasets. Analyses of enrichment showed that female-specific DEGs primarily focused on energy metabolism, while male-specific DEGs mostly involved in immune regulation. Three immune-checkpoint-relevant genes dysregulated in males. In females, however, these eight genes were not differentially expressed. SNRPG, RPS27A, COX7A2, ATP5PO, LSM3, COX7C, PFDN5, HINT1, PSMA6, RPS3A and RPL31 were regarded as hub genes for females, while SNRPG, RPL31, COX7C, RPS27A, RPL35A, RPS3A, RPS20 and PFDN5 were regarded as hub genes for males. Thirteen hub genes mentioned above was significantly lower in both AD and mild cognitive impairment (MCI). The diagnostic model of 15-marker panel (13 hub genes with sex and age) was developed. Both the training dataset and the independent validation dataset have area under the curve (AUC) with a high value (0.919, 95%CI 0.901–0.929 and 0.803, 95%CI 0.789–0.826). Based on GSEA for hub genes, they were associated with some aspects of AD pathogenesis. Conclusion DEGs in males and females contribute differently to AD pathogenesis. Algorithms combining blood-based biomarkers may improve AD diagnostic accuracy, but large validation studies are needed. Supplementary Information The online version contains supplementary material available at 10.1186/s41065-022-00252-x.
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Affiliation(s)
- Wencan Ji
- Nanjing Medical University, Nanjing, 211166, Jiangsu, China.,Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing, 210009, Jiangsu,, China
| | - Ke An
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing, 210009, Jiangsu,, China.,School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Canjun Wang
- Department of Laboratory Medicine, Affiliated Zhongda Hospital of Southeast University, Nanjing, 210009, Jiangsu, China
| | - Shaohua Wang
- Nanjing Medical University, Nanjing, 211166, Jiangsu, China. .,Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing, 210009, Jiangsu,, China. .,School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China.
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Park KW, Kim J, Seo J, Moon S, Jeong K, An K. Entropic comparison of Landau-Zener and Demkov interactions in the phase space of a quadrupole billiard. Chaos 2022; 32:103101. [PMID: 36319274 DOI: 10.1063/5.0101495] [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] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 09/05/2022] [Indexed: 06/16/2023]
Abstract
We investigate two types of avoided crossings in a chaotic billiard within the framework of information theory. The Shannon entropy in the phase space for the Landau-Zener interaction increases as the center of the avoided crossing is approached, whereas for the Demkov interaction, the Shannon entropy decreases as the center of avoided crossing is passed by with an increase in the deformation parameter. This feature can provide a new indicator for scar formation. In addition, it is found that the Fisher information of the Landau-Zener interaction is significantly larger than that of the Demkov interaction.
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Affiliation(s)
- K-W Park
- Research Institute of Mathematics, Seoul National University, Seoul 08826, South Korea
| | - J Kim
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea
| | - J Seo
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea
| | - S Moon
- Faculty of Liberal Education, Seoul National University, Seoul 08826, South Korea
| | - K Jeong
- Research Institute of Mathematics, Seoul National University, Seoul 08826, South Korea
| | - K An
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea
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Wang W, Xin X, An K, Chen Y, Zhao Z, Tan J, Yang D, Jiang Z. Bioinspired construction of g-C3N4 isotype heterojunction on carbonized poly(tannic acid) nanorod surface with multistep electron transfer path. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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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37
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Sihota T, Chen Y, Nagelberg A, Chow J, Shi R, An K, Lockwood W. EP16.03-039 Characterizing SHPRH as a Novel Tumor Suppressor Gene in Lung Adenocarcinoma. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.1100] [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: 11/16/2022]
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38
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An K, Gu J. [Concept of lateral lymph nodes in rectal cancer and controversy over lateral lymph node dissection]. Zhonghua Wei Chang Wai Ke Za Zhi 2022; 25:694-698. [PMID: 35970803 DOI: 10.3760/cma.j.cn441530-20220725-00326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Lateral lymph node (LLN) metastasis in locally advanced rectal cancer (LARC) is associated with patient prognosis. However, the role of lateral lymph node dissection (LLND) remains controversial. The concept of LLN and the exact definition of LLND have been inconsistently reported in the literatures. The treatment strategy for LARC has differed between the East and the West. The Japanese doctors advocates total mesorectal excision (TME) with LLND for LARC, but less neoadjuvant radiochemotherapy (NARC). European and Americans prefer NARC plus TME, and do not recommend LLND. So far, only the Japanese Statute of Colorectal Cancer has a clear definition of the concept of LLN and LLND. The use of TME plus LLND for LARC is not supported by high level evidences. In today's high-speed development of minimally invasive surgery, the proper selection of standardized surgical methods for LARC requires the joint efforts of scholars from the East and the West to conduct multicenter high-grade clinical trials to select the best treatment option for patients with LARC.
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Affiliation(s)
- K An
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144,China
| | - J Gu
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144,China Department of Gastrointestinal Surgery III, Peking University Cancer Hospital & Institute, Beijing 100142, China
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Gao Y, Zhao H, An K, Liu Z, Hai L, Li R, Zhou Y, Zhao W, Jia Y, Wu N, Li L, Ying J, Wang J, Xu B, Wu Z, Tong Z, He J, Sun Y. Whole-genome bisulfite sequencing analysis of circulating tumour DNA for the detection and molecular classification of cancer. Clin Transl Med 2022; 12:e1014. [PMID: 35998020 PMCID: PMC9398227 DOI: 10.1002/ctm2.1014] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 07/26/2022] [Accepted: 08/02/2022] [Indexed: 12/02/2022] Open
Abstract
Background Cancer cell–specific variation and circulating tumour DNA (ctDNA) methylation are promising biomarkers for non‐invasive cancer detection and molecular classification. Nevertheless, the applications of ctDNA to the early detection and screening of cancer remain highly challenging due to the scarcity of cancer cell–specific ctDNA, the low signal‐to‐noise ratio of DNA variation, and the lack of non‐locus‐specific DNA methylation technologies. Methods We enrolled three cohorts of breast cancer (BC) patients from two hospitals in China (BC: n = 123; healthy controls: n = 40). We developed a ctDNA whole‐genome bisulfite sequencing technology employing robust trace ctDNA capture from up to 200 μL plasma, mini‐input (1 ng) library preparation, unbiased genome‐wide coverage and comprehensive computational methods. Results A diagnostic signature comprising 15 ctDNA methylation markers exhibited high accuracy in the early (area under the curve [AUC] of 0.967) and advanced (AUC of 0.971) BC stages in multicentre patient cohorts. Furthermore, we revealed a ctDNA methylation signature that discriminates estrogen receptor status (Training set: AUC of 0.984 and Test set: AUC of 0.780). Different cancer types, including hepatocellular carcinoma and lung cancer, could also be well distinguished. Conclusions Our study provides a toolset to generate unbiased whole‐genome ctDNA methylomes with a minimal amount of plasma to develop highly specific and sensitive biomarkers for the early diagnosis and molecular subtyping of cancer.
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Affiliation(s)
- Yibo Gao
- Central Laboratory, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China.,Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Laboratory of Translational Medicine, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hengqiang Zhao
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ke An
- Key Laboratory of Genomic and Precision Medicine, China Gastrointestinal Cancer Research Center, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Zongzhi Liu
- Central Laboratory, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China.,Key Laboratory of Genomic and Precision Medicine, China Gastrointestinal Cancer Research Center, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Luo Hai
- Central Laboratory, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China
| | - Renda Li
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yang Zhou
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Weipeng Zhao
- Department of Breast Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University, Tianjin, China
| | - Yongsheng Jia
- Department of Breast Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University, Tianjin, China
| | - Nan Wu
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Lingyu Li
- Central Laboratory, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China
| | - Jianming Ying
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jie Wang
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Binghe Xu
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Zhihong Wu
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Zhongsheng Tong
- Department of Breast Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University, Tianjin, China
| | - Jie He
- Central Laboratory, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China.,Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yingli Sun
- Central Laboratory, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China.,State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Key Laboratory of Genomic and Precision Medicine, China Gastrointestinal Cancer Research Center, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
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Li W, Lin K, Yan Y, Yu C, Cao Y, Chen X, Wang CW, Kato K, Chen Y, An K, Zhang Q, Gu L, Li Q, Deng J, Xing X. A Seawater-Corrosion-Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co) 2 Alloy. Adv Mater 2022; 34:e2109592. [PMID: 35772730 DOI: 10.1002/adma.202109592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 05/11/2022] [Indexed: 06/15/2023]
Abstract
Zero thermal expansion (ZTE) alloys as dimensionally stable materials are usually challenged by harsh environmental erosion, since ZTE and corrosion resistance are generally mutually exclusive. Here, a high-performance alloy, Zr0.8 Ta0.2 Fe1.7 Co0.3 , is reported, that shows isotropic ZTE behavior (αl = 0.21(2) × 10-6 K-1 ) in a wide temperature range of 5-360 K, high corrosion resistance in a seawater-like solution compared with classic Invar and stainless Invar, and excellent cyclic thermal and structural stabilities. Such stabilities are attributed to the cubic symmetry, the controllable magnetic order, and the spontaneously formed passive film with Ta and Zr chemical modifications. The results are evidenced by X-ray/neutron diffraction, microscopy, spectroscopy, and electrochemistry investigations. Such multiple stabilities have the potential to broaden the robust applications of ZTE alloys, especially in marine services.
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Affiliation(s)
- Wenjie Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Kun Lin
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yu Yan
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Chengyi Yu
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yili Cao
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xin Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Chin-Wei Wang
- Neutron Group, National Synchrotron Radiation Research Center, Hsinchu, 30076, Australia
| | - Kenichi Kato
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Yan Chen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Ke An
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Qinghua Zhang
- Institution of Physics, Chinese Academic of Science, No. 8, 3rd South Street, Zhongguancun, Haidian District, Beijing, 100190, P. R. China
| | - Lin Gu
- Institution of Physics, Chinese Academic of Science, No. 8, 3rd South Street, Zhongguancun, Haidian District, Beijing, 100190, P. R. China
| | - Qiang Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jinxia Deng
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xianran Xing
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
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Yu Z, Lv Y, Huang F, Zhang F, Shi Q, An K, Fan T, Li G, Wang J. Photoatalytic Degradation of Organic Pollutants in Water Under Visible Light by NH
2
‐MIL‐125(Ti‐Zr)@BiOCl
x
I
1‐
x
Composite Photocatalyst. ChemistrySelect 2022. [DOI: 10.1002/slct.202201958] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zhengming Yu
- Key Laboratory of Analytical Science and Technology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 China
| | - Yunkai Lv
- Key Laboratory of Analytical Science and Technology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 China
| | - Feng Huang
- Key Laboratory of Analytical Science and Technology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 China
| | - Fang Zhang
- Key Laboratory of Analytical Science and Technology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 China
| | - Qi Shi
- Key Laboratory of Analytical Science and Technology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 China
| | - Ke An
- Key Laboratory of Analytical Science and Technology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 China
| | - Tingting Fan
- Key Laboratory of Analytical Science and Technology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 China
| | - Gang Li
- Baoding Green Yijia Environmental Protection Technology Ltd. Baoding 071002 China
| | - Jing Wang
- Key Laboratory of Analytical Science and Technology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 China
- Baoding Green Yijia Environmental Protection Technology Ltd. Baoding 071002 China
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Tam A, Kulkarni J, An K, Li L, Dorscheid DR, Singhera GK, Bernatchez P, Reid G, Chan K, Witzigmann D, Cullis PR, Sin DD, Lim CJ. Lipid nanoparticle formulations for optimal RNA-based topical delivery to murine airways. Eur J Pharm Sci 2022; 176:106234. [PMID: 35688311 DOI: 10.1016/j.ejps.2022.106234] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 01/10/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Lipid nanoparticles (LNP) have been successfully used as a platform technology for delivering nucleic acids to the liver. To broaden the application of LNPs in targeting non-hepatic tissues, we developed LNP-based RNA therapies (siRNA or mRNA) for the respiratory tract. Such optimized LNP systems could offer an early treatment strategy for viral respiratory tract infections such as COVID-19. METHODS We generated a small library of six LNP formulations with varying helper lipid compositions and characterized their hydrodynamic diameter, size distribution and cargo entrapment properties. Next, we screened these LNP formulations for particle uptake and evaluated their potential for transfecting mRNA encoding green fluorescence protein (GFP) or SARS-CoV2 nucleocapsid-GFP fusion reporter gene in a human airway epithelial cell line in vitro. Following LNP-siGFP delivery, GFP protein knockdown efficiency was assessed by flow cytometry to determine %GFP+ cells and median fluorescence intensity (MFI) for GFP. Finally, lead LNP candidates were validated in Friend leukemia virus B (FVB) male mice via intranasal delivery of an mRNA encoding luciferase, using in vivo bioluminescence imaging. RESULTS Dynamic light scattering revealed that all LNP formulations contained particles with an average diameter of <100 nm and a polydispersity index of <0.2. Human airway epithelial cell lines in culture internalized LNPs with differential GFP transfection efficiencies (73-97%). The lead formulation LNP6 entrapping GFP or Nuc-GFP mRNA demonstrated the highest transfection efficiency (97%). Administration of LNP-GFP siRNA resulted in a significant reduction of GFP protein expression. For in vivo studies, intranasal delivery of LNPs containing helper lipids (DSPC, DOPC, ESM or DOPS) with luciferase mRNA showed significant increase in luminescence expression in nasal cavity and lungs by at least 10 times above baseline control. CONCLUSION LNP formulations enable the delivery of RNA payloads into human airway epithelial cells, and in the murine respiratory system; they can be delivered to nasal mucosa and lower respiratory tract via intranasal delivery. The composition of helper lipids in LNPs crucially modulates transfection efficiencies in airway epithelia, highlighting their importance in effective delivery of therapeutic products for airways diseases.
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Affiliation(s)
- A Tam
- NanoVation Therapeutics Inc. Vancouver, British Columbia, Canada; Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital Research Institute, University of British Columbia Vancouver, British Columbia, Canada; University of British Columbia (UBC) Center for Heart Lung Innovation, St. Paul's Hospital, Vancouver, British Columbia, Canada
| | - J Kulkarni
- NanoVation Therapeutics Inc. Vancouver, British Columbia, Canada; NanoMedicines Innovation Network, Vancouver, British Columbia, Canada; University of British Columbia (UBC), Department of Biochemistry and Molecular Biology, Vancouver, British Columbia, Canada
| | - K An
- NanoVation Therapeutics Inc. Vancouver, British Columbia, Canada; University of British Columbia (UBC), Department of Biochemistry and Molecular Biology, Vancouver, British Columbia, Canada
| | - L Li
- Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital Research Institute, University of British Columbia Vancouver, British Columbia, Canada
| | - D R Dorscheid
- University of British Columbia (UBC) Center for Heart Lung Innovation, St. Paul's Hospital, Vancouver, British Columbia, Canada
| | - G K Singhera
- University of British Columbia (UBC) Center for Heart Lung Innovation, St. Paul's Hospital, Vancouver, British Columbia, Canada; Department of Medicine (Division of Respirology), UBC, Vancouver, British Columbia, Canada
| | - P Bernatchez
- University of British Columbia (UBC) Center for Heart Lung Innovation, St. Paul's Hospital, Vancouver, British Columbia, Canada; Department of Medicine (Division of Respirology), UBC, Vancouver, British Columbia, Canada; Department of Anesthesiology, Pharmacology & Therapeutics, University of British Columbia, 217-2176 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Gsd Reid
- Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital Research Institute, University of British Columbia Vancouver, British Columbia, Canada
| | - Kyt Chan
- NanoMedicines Innovation Network, Vancouver, British Columbia, Canada; University of British Columbia (UBC), Department of Biochemistry and Molecular Biology, Vancouver, British Columbia, Canada
| | - D Witzigmann
- NanoVation Therapeutics Inc. Vancouver, British Columbia, Canada; NanoMedicines Innovation Network, Vancouver, British Columbia, Canada; University of British Columbia (UBC), Department of Biochemistry and Molecular Biology, Vancouver, British Columbia, Canada
| | - P R Cullis
- NanoVation Therapeutics Inc. Vancouver, British Columbia, Canada; NanoMedicines Innovation Network, Vancouver, British Columbia, Canada; University of British Columbia (UBC), Department of Biochemistry and Molecular Biology, Vancouver, British Columbia, Canada
| | - D D Sin
- University of British Columbia (UBC) Center for Heart Lung Innovation, St. Paul's Hospital, Vancouver, British Columbia, Canada
| | - C J Lim
- Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital Research Institute, University of British Columbia Vancouver, British Columbia, Canada.
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Gu J, Lei F, Wang X, Chen H, Huang W, He X, Hong Y, Zeng Q, Wang Y, Gao Q, Yuan Z, Niu P, Huang D, Gao Z, Ding C, Zhai Z, An K, Chen S, Zhao X, Bai Y. Recurrence risk stratification model for patients with stage I-III colorectal cancer based on clinicopathological and postoperative ctDNA predictors. J Clin Oncol 2022. [DOI: 10.1200/jco.2022.40.16_suppl.e15511] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15511 Background: The aim of this study was to propose a new kind of recurrence risk classification and further establish a prognostic model for resected stage I-III colorectal cancer (CRC). Methods: From 2017 to 2020, 142 patients diagnosed with stage I-III CRC at Peking University Shougang Hospital were recruited for this study. Tissues and paired white blood cells were analyzed with a 733-gene NGS panel, and peripheral plasma obtained 7-10 days after surgery was analyzed with a 127-gene ultra-deep target panel in a CLIA-certified laboratory. The relationship between the postoperative ctDNA status, clinicopathological features and recurrence-free survival (RFS) was identified by log-rank test and Cox regression analysis. Results: In total, 108 patients successfully completed both tissue and postoperative plasma NGS tests, of which 17 patients were postoperatively positive for ctDNA (tumor-informed, ≥1 somatic mutation). Postoperative ctDNA positivity was independently associated with poorer RFS (HR = 8.4, P < 0.0001). Postoperative recurrence rates were significantly higher in ctDNA-positive patients than ctDNA-negative patients (76.5% vs 16.5%, P < 0.0001). Univariate analysis showed that, in addition to ctDNA status, stage, vascular invasion, neural invasion, and preoperative CEA were all significantly associated with worse RFS (P < 0.05). Furthermore, in a COX regression model, the contribution of these clinicopathological factors to RFS has been adjusted. The model showed good discrimination [the concordance index (c-index): 0.811] of recurrence. Clinically high-risk groups according to clinicopathological risk model had significantly poorer RFS than low-risk groups (HR = 10.6, P < 0.001). In the clinicopathological high-risk group, ctDNA-positive patients can still further differentiate the higher risk of recurrence (HR = 3.7, P = 0.0012). There were similar trends in the clinicopathological low-risk group (HR = 6.1, P = 0.066). Combining the clinicopathological model and ctDNA, patients with either clinicopathological high-risk or ctDNA-positive had a significantly poorer RFS, compared with both clinicopathological low-risk and ctDNA-negative (HR = 12.9, P < 0.0001). Conclusions: Postoperative ctDNA can independently predict the risk of recurrence in stage I-III CRC. Combining clinicopathological factors and ctDNA showed superiority for recurrence risk stratification over either alone. This recurrence risk stratification model may serve as a useful clinical tool to help clinicians determine individualized treatment plans for stage I-III CRC patients. However, the model still needs further external cohort validation.
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Affiliation(s)
- Jin Gu
- Peking University Cancer Hospital; Peking University Shougang Hospital, Beijing, China
| | - Fuming Lei
- Peking University Shougang Hospital, Beijing, China
| | | | - Hui Chen
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | | | - Xiaomang He
- Peking University Shougang Hospital, Beijing, China
| | - Yuming Hong
- Peking University Shougang Hospital, Beijing, China
| | - Qingmin Zeng
- Peking University Shougang Hospital, Beijing, China
| | - Yanzhao Wang
- Peking University Shougang Hospital, Beijing, China
| | - Qingkun Gao
- Peking University Shougang Hospital, Beijing, China
| | - Zheping Yuan
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | - Pengfei Niu
- Peking University Shougang Hospital, Beijing, China
| | - Dandan Huang
- Peking University Shougang Hospital, Beijing, China
| | - Zhaoya Gao
- Peking University Shougang Hospital, Beijing, China
| | | | - Zhichao Zhai
- Peking University Shougang Hospital, Beijing, China
| | - Ke An
- Peking University Shougang Hospital, Beijing, China
| | - Shiqing Chen
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | - Xiaochen Zhao
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | - Yuezong Bai
- Department of Gastrointestinal Oncology, Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital & Institute, Beijing, China
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Li Z, Guan B, Xia F, Nie J, Li W, Ma L, Li W, Zhou L, Wang Y, Tian H, Luo J, Chen Y, Frost M, An K, Liu X. High-Entropy Perovskite as a High-Performing Chromium-Tolerant Cathode for Solid Oxide Fuel Cells. ACS Appl Mater Interfaces 2022; 14:24363-24373. [PMID: 35576580 DOI: 10.1021/acsami.2c03657] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
To achieve chromium tolerance and high performance, a new series of high-entropy perovskites (HEPs) are investigated as cathode materials for solid oxide fuel cells (SOFCs). Multiple rare-earth, alkaline-earth, and high-order transition metal elements are used for the A-site of this ABO3 structure. A pure phase is achieved through the designed combination of different elements in seven out of eight candidates. Due to the retaining of alkaline-earth elements Sr and/or Ba, the electrical conductivities of these HEPs are in the order of 100 S/cm at 550-700 °C, a value that can practically eliminate the electronic resistance of the porous cathode. Three out of eight candidates show similar or better performance than the (La0.6Sr0.4)(Co0.2Fe0.8)O3-δ (LSCF) benchmark. It is found that A-site elements can cast a substantial influence on the overall performance even with a change as small as 10% of the total cations. It seems that each element has its individual "phenomenal activity" that can be transferred from one candidate to the other in the general setting of the perovskite structure, leading to the best candidate by using the three most active elements simultaneously at the A-site. Excellent Cr tolerance has been observed on the (La0.2Sr0.2Pr0.2Y0.2Ba0.2)Co0.2Fe0.8O3-δ sample, showing degradation of only 0.25%/kh during a 41 day operation in the presence of Cr, while LSCF increases by 100% within the first day in the same condition. X-ray photoelectron spectroscopy discovers no Sr segregation as LSCF is found in this HEP; rather, the active element Y takes more A-sites on the outermost layer after long-term operation.
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Affiliation(s)
- Zhongqiu Li
- Mechanical & Aerospace Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States
- School of Physics & Electronic Engineering, Harbin Normal University, Harbin 150025, China
| | - Bo Guan
- Mechanical & Aerospace Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Fang Xia
- Harry Butler Institute, Murdoch University, Perth, Western Australia 6150, Australia
| | - Jiuyuan Nie
- Department of NanoEngineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Wenyuan Li
- Chemical and Biomedical Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Liang Ma
- Mechanical & Aerospace Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States
- School of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, China
| | - Wei Li
- Mechanical & Aerospace Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Lingfeng Zhou
- Mechanical & Aerospace Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Yi Wang
- Mechanical & Aerospace Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Hanchen Tian
- Mechanical & Aerospace Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Jian Luo
- Department of NanoEngineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Yan Chen
- Neutron Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Matthew Frost
- Neutron Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Ke An
- Neutron Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Xingbo Liu
- Mechanical & Aerospace Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States
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An K, Stoica AD, Huegle T, Lin JYY, Graves V. MENUS-Materials engineering by neutron scattering. Rev Sci Instrum 2022; 93:053911. [PMID: 35649786 DOI: 10.1063/5.0089783] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Materials engineering by neutron scattering (MENUS) at the second target station will be a transformational high-flux, versatile, multiscale materials engineering diffraction beamline with unprecedented new capabilities for the study of complex materials and structures. It will support both fundamental and applied materials research in a broad range of fields. MENUS will combine unprecedented long-wavelength neutron flux and unique detector coverage to enable real-time studies of complex structural and functional materials under external stimuli. The incorporated small angle neutron scattering and transmission/imaging capabilities will extend its sensitivity to larger length scales and higher spatial resolution. Multimodal MENUS will provide crystallographic and microstructure data to the materials science and engineering community to understand lattice strain/phase transition/microstructure/texture evolution in three orthogonal directions in complex material systems under combined extreme applied conditions. The capabilities of MENUS will open new scientific opportunities and meet the research needs for science challenges to enable studies of a range of phenomena and answer the key questions in material design/exploration, advanced material processing, transformative manufacturing, and material operations of national impacts in our daily life.
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Affiliation(s)
- Ke An
- Neutron Scattering Division, Oak Ridge National Laboratory, 1 Bethel Valley Rd., Oak Ridge, Tennessee 37831, USA
| | - Alexandru D Stoica
- Neutron Scattering Division, Oak Ridge National Laboratory, 1 Bethel Valley Rd., Oak Ridge, Tennessee 37831, USA
| | - Thomas Huegle
- Neutron Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Jiao Y Y Lin
- Neutron Scattering Division, Oak Ridge National Laboratory, 1 Bethel Valley Rd., Oak Ridge, Tennessee 37831, USA
| | - Van Graves
- Spallation Neutron Source Second Target Station Project, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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Shi D, An K, Zhang H, Xu P, Bai C. Application of Coarse-Grained (CG) Models to Explore Conformational Pathway of Large-Scale Protein Machines. Entropy 2022; 24:e24050620. [PMID: 35626506 PMCID: PMC9140642 DOI: 10.3390/e24050620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/16/2022] [Accepted: 04/27/2022] [Indexed: 12/14/2022]
Abstract
Protein machines are clusters of protein assemblies that function in order to control the transfer of matter and energy in cells. For a specific protein machine, its working mechanisms are not only determined by the static crystal structures, but also related to the conformational transition dynamics and the corresponding energy profiles. With the rapid development of crystallographic techniques, the spatial scale of resolved structures is reaching up to thousands of residues, and the concomitant conformational changes become more and more complicated, posing a great challenge for computational biology research. Previously, a coarse-grained (CG) model aiming at conformational free energy evaluation was developed and showed excellent ability to reproduce the energy profiles by accurate electrostatic interaction calculations. In this study, we extended the application of the CG model to a series of large-scale protein machine systems. The spike protein trimer of SARS-CoV-2, ATP citrate lyase (ACLY) tetramer, and P4-ATPases systems were carefully studied and discussed as examples. It is indicated that the CG model is effective to depict the energy profiles of the conformational pathway between two endpoint structures, especially for large-scale systems. Both the energy change and energy barrier between endpoint structures provide reasonable mechanism explanations for the associated biological processes, including the opening of receptor binding domain (RBD) of spike protein, the phospholipid transportation of P4-ATPase, and the loop translocation of ACLY. Taken together, the CG model provides a suitable alternative in mechanistic studies related to conformational change in large-scale protein machines.
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Affiliation(s)
- Danfeng Shi
- Warshel Institute for Computational Biology, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China; (D.S.); (K.A.); (H.Z.); (P.X.)
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Ke An
- Warshel Institute for Computational Biology, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China; (D.S.); (K.A.); (H.Z.); (P.X.)
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Honghui Zhang
- Warshel Institute for Computational Biology, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China; (D.S.); (K.A.); (H.Z.); (P.X.)
| | - Peiyi Xu
- Warshel Institute for Computational Biology, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China; (D.S.); (K.A.); (H.Z.); (P.X.)
| | - Chen Bai
- Warshel Institute for Computational Biology, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China; (D.S.); (K.A.); (H.Z.); (P.X.)
- Correspondence:
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Liu D, Zhang G, Zhu Y, Liu X, Xu S, He M, Chen S, An K, Liang G, Zhu Z. Effectiveness of Ultrasound-Guided Retrolaminar Block and Erector Spinae Plane Block in Retroperitoneal Laparoscopic Surgery: A Randomized Controlled Trial. J Pain Res 2022; 15:815-826. [PMID: 35370419 PMCID: PMC8974250 DOI: 10.2147/jpr.s349028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 02/24/2022] [Indexed: 01/12/2023] Open
Abstract
Purpose Retrolaminar block (RLB) and erector spine plane block (ESPB) share a similar block site, but their analgesia principle may differ. This study compared the postoperative analgesic effects of ultrasound-guided RLB and ESPB for retroperitoneal laparoscopic surgery. Patients and Methods The study included patients who scheduled for laparoscopic nephrectomy from July 2020 to January 2021. Patients in RLB group received a three-point block at the posterior surface of T8-T10 lamina, and those in ESPB group received at the T9 level. The primary result was the score of visual analogue scale (VAS). Secondary results included information on intraoperative and postoperative analgesia consumption and rescue analgesia usage, skin temperature, serum interleukin (IL)-1β, prostaglandin E2 (PGE2) level and the occurrence of safety events. Results There was no significant difference between the two groups in the postoperative VAS scores at both the rest and cough state (All P>0.05). The skin surface temperature of the affected side and the healthy side in ESPB group was higher than that in the RLB group at the end of the surgery (P=0.002) and after surgery (P=0.016). The RLB group had a higher ephedrine usage than the ESPB group (P=0.027). Compared with the ESPB group, the RLB group had a shorter time to exhaust (P=0.045) and lower serum IL-1β level (P=0.049). Patients in neither group developed severe adverse event. Conclusion Ultrasound-guided RLB and ESPB can provide safe and effective postoperative analgesia for retroperitoneal laparoscopic surgery. ESPB has more stable intraoperative hemodynamics, while RLB has more potential research value for patients’ rapid recovery.
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Affiliation(s)
- Dexing Liu
- Medical College of Soochow University, Soochow University, Suzhou, People’s Republic of China
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
| | - Guangting Zhang
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
| | - Yuhang Zhu
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
| | - Xingxing Liu
- Medical College of Soochow University, Soochow University, Suzhou, People’s Republic of China
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
| | - Shan Xu
- Medical College of Soochow University, Soochow University, Suzhou, People’s Republic of China
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
| | - Miao He
- Medical College of Soochow University, Soochow University, Suzhou, People’s Republic of China
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
| | - Shulian Chen
- Department of Urology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
| | - Ke An
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
| | - Guobiao Liang
- Medical College of Soochow University, Soochow University, Suzhou, People’s Republic of China
- Department of Urology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
| | - Zhaoqiong Zhu
- Medical College of Soochow University, Soochow University, Suzhou, People’s Republic of China
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, People’s Republic of China
- Correspondence: Zhaoqiong Zhu, Tel +86-851-28609145, Fax +86-851-28609145, Email
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Lam TN, Wu YH, Liu CJ, Chae H, Lee SY, Jain J, An K, Huang EW. Transient Phase-Driven Cyclic Deformation in Additively Manufactured 15-5 PH Steel. Materials (Basel) 2022; 15:ma15030777. [PMID: 35160723 PMCID: PMC8836881 DOI: 10.3390/ma15030777] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/14/2022] [Accepted: 01/17/2022] [Indexed: 11/19/2022]
Abstract
The present work extends the examination of selective laser melting (SLM)-fabricated 15-5 PH steel with the 8%-transient-austenite-phase towards fully-reversed strain-controlled low-cycle fatigue (LCF) test. The cyclic-deformation response and microstructural evolution were investigated via in-situ neutron-diffraction measurements. The transient-austenite-phase rapidly transformed into the martensite phase in the initial cyclic-hardening stage, followed by an almost complete martensitic transformation in the cyclic-softening and steady stage. The compressive stress was much greater than the tensile stress at the same strain amplitude. The enhanced martensitic transformation associated with lower dislocation densities under compression predominantly governed such a striking tension-compression asymmetry in the SLM-built 15-5 PH.
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Affiliation(s)
- Tu-Ngoc Lam
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan; (T.-N.L.); (Y.-H.W.); (C.-J.L.)
- Department of Physics, College of Education, Can Tho University, Can Tho 900000, Vietnam
| | - Yu-Hao Wu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan; (T.-N.L.); (Y.-H.W.); (C.-J.L.)
| | - Chia-Jou Liu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan; (T.-N.L.); (Y.-H.W.); (C.-J.L.)
| | - Hobyung Chae
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Korea;
| | - Soo-Yeol Lee
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Korea;
- Correspondence: (S.-Y.L.); (J.J.); (E.-W.H.)
| | - Jayant Jain
- Department of Materials Science and Engineering, Indian Institute of Technology, New Delhi 110016, India
- Correspondence: (S.-Y.L.); (J.J.); (E.-W.H.)
| | - Ke An
- Chemical and Engineering Materials Division, The Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;
| | - E-Wen Huang
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan; (T.-N.L.); (Y.-H.W.); (C.-J.L.)
- Correspondence: (S.-Y.L.); (J.J.); (E.-W.H.)
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An K, Tan J, Yang D, Ren H, Zhao Z, Chen Y, Wang W, Xin X, Shi Y, Jiang Z. Modular Assembly of Electron Transfer Pathway in Bimetallic MOF for Photocatalytic Ammonia Synthesis. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02294f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It is a long-term pursuit to implement the green and sustainable photocatalytic production of ammonia via the conversion of water and nitrogen under mild conditions. Due to the rapid recombination...
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An K, Cui Y, Zhong X, Li K, Zhang J, Liu H, Wen Z. Immortalized Bone Mesenchymal Stromal Cells With Inducible Galanin Expression Produce Controllable Pain Relief in Neuropathic Rats. Cell Transplant 2022; 31:9636897221103861. [PMID: 35726855 PMCID: PMC9218486 DOI: 10.1177/09636897221103861] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Management of chronic pain is one of the most difficult problems in modern practice. Grafted human telomerase reverse transcriptase–immortalized bone marrow mesenchymal stromal cells (hTERT-BMSCs) with inducible galanin (GAL) expression have been considered to be a potentially safe and controllable approach for the alleviation of chronic pain. Therefore, in this study, we aimed to assess the feasibility of hTERT-BMSCs/Tet-on/GAL cells secreting GAL under the transcriptional control of doxycycline (Dox) for controllable pain relief. After transplanted into the subarachnoid space of neuropathic rats induced by spared nerve injury of sciatic nerve, their analgesic actions were investigated by behavioral tests. The results showed that the pain-related behaviors, mechanical allodynia, and thermal hyperalgesia were significantly alleviated during 1 to 7 weeks after grafts of hTERT-BMSCs/Tet-on/GAL cells without motor incoordination. Importantly, these effects could be reversed by GAL receptor antagonist M35 and regulated by Dox induction as compared with control. Moreover, the GAL level in cerebrospinal fluid and spinal GAL receptor 1 (GalR1) expression were correlated with Dox administration, but not GAL receptor 2 (GalR2). Meanwhile, spinal protein kinase Mζ (PKMζ) expression was also inhibited significantly. Taken together, these data suggest that inducible release of GAL from transplanted cells was able to produce controllable pain relief in neuropathic rats via inhibiting the PKMζ activation and activating its GalR1 rather than GalR2. This provides a promising step toward a novel stem cell–based strategy for pain therapy.
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Affiliation(s)
- Ke An
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yingpeng Cui
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Xiaolong Zhong
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Department of Anesthesiology, Guangzhou First people's Hospital, Guangzhou, China
| | - Kunhe Li
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Jinjun Zhang
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Huiping Liu
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Department of Anesthesiology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Zhishuang Wen
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
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