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Xiong Z, Yang Z, Hu X, Yi M, Cai J. Individualised prediction of progression of solitary sub-solid pulmonary nodules based on CT semantic and clinical features: a 3-year follow-up study. Clin Radiol 2024; 79:e174-e181. [PMID: 37945437 DOI: 10.1016/j.crad.2023.10.005] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 09/27/2023] [Accepted: 10/01/2023] [Indexed: 11/12/2023]
Abstract
AIM To develop and validate a progressive prediction model for estimating the time to progression (TTP) of sub-solid pulmonary nodules (SSNs). MATERIALS AND METHODS A total of 126 cases who met inclusion and exclusion criteria were included in the study. The primary endpoint of the study was TTP of SSNs. Baseline characteristics were assessed in terms of clinical and CT semantic features. Kaplan-Meier analysis and Cox regression analysis were performed to determine the relationship between SSNs TTP and factors from the entire data set. The nomogram was constructed based on the result of multivariate analysis and internal validation was performed using the bootstrapping. The nomogram's performance was assessed with the C-index, calibration curves, and decision curve analysis. RESULTS The median follow-up time of the population was 42.5 (21.5) months. On Kaplan-Meier analysis, patients with higher or positive values of the indices had higher cumulative progression rates (p<0.05). Multivariate Cox regression models identified diameter, consolidation tumour ratio (CTR), morphology, and vasodilation sign (VDS) as independent risk factors of TTP. These predictors were included in the final model to estimate individual probabilities of progression in the 3 years, which performed well in the discrimination (the C-index was 0.901 [95%CI: 0.830-0.981] and 0.875 [95%CI: 0.805-0.942] in the training and internally validation sets). CONCLUSION The radiological semantic features nomogram is a promising and favourable prognostic biomarker for predicting progression and may aid in clinical risk stratification and decision-making for SSNs.
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Affiliation(s)
- Z Xiong
- Department of Radiology, The Fifth People's Hospital of Chongqing, China; Department of Nuclear Medicine, Affiliated Hospital of Zunyi Medical University, China
| | - Z Yang
- Department of Radiology, Kaiyang County People's Hospital of Guizhou Province, China
| | - X Hu
- Department of Nuclear Medicine, Affiliated Hospital of Zunyi Medical University, China
| | - M Yi
- Department of Radiology, The Fifth People's Hospital of Chongqing, China
| | - J Cai
- Department of Nuclear Medicine, Affiliated Hospital of Zunyi Medical University, China.
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2
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Yi M, Wang S, Zhang X, Jiang L, Xia X, Zhang T, Fang X. Linc-ROR Promotes EMT by Targeting miR-204-5p/SMAD4 in Endometriosis. Reprod Sci 2023; 30:2665-2679. [PMID: 36917423 DOI: 10.1007/s43032-023-01204-0] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 02/17/2023] [Indexed: 03/16/2023]
Abstract
Endometriosis (EMs) is a systemic and chronic disease with cancer-like feature, namely, distant implantation, which caused heavy healthy burden of nearly 200 million females. LncRNAs have been proved as new modulators in epithelial-mesenchymal transition (EMT) and EMs. Quantitative real-time PCR was conducted to measure the expression level of long intergenic non-protein coding RNA, regulator of reprogramming (Linc-ROR), and miR-204-5p in ectopic endometrium (n = 25), eutopic endometrium (n = 20), and natural control endometrium (n = 22). Overexpression of Linc-ROR, knockdown or overexpression of miR-204-5p in End1/E6E7 and Ishikawa cells, was conducted to detect the function of Linc-ROR and miR-204-5p in EMs. Furthermore, luciferase reports were used to confirm the combination of Linc-ROR and miR-204-5p and the combination between miR-204-5p and SMAD4. Cell-Counting Kit-8, EdU assay, transwell assays, and Western blotting were used to detect the function of Linc-ROR and miR-204-5p in EMs cancer-like behaviors and EMT process. Linc-ROR was up-regulated in ectopic endometrium. Overexpressed Linc-ROR promotes cell proliferation, invasion, and EMT process. Linc-ROR regulated the EMT process, cellular proliferation, and invasion of EMs via binding to miR-204-5p. In addition, overexpression of Linc-ROR up-regulated SMAD4, a target protein of miR-204-5p, with which regulated EMT process and cancer-like behaviors in EMs together. Linc-ROR/miR-204-5p/SMAD4 axis plays a vital role in regulation EMT process in EMs, which might become a novel therapeutic targets and powerful biomarkers in EMs therapy.
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Affiliation(s)
- Mingyu Yi
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, NO.139 Middle Renmin Road, Changsha, 410011, Hunan, China
| | - Sixue Wang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, NO.139 Middle Renmin Road, Changsha, 410011, Hunan, China
| | - Xinyue Zhang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, NO.139 Middle Renmin Road, Changsha, 410011, Hunan, China
| | - Li Jiang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, NO.139 Middle Renmin Road, Changsha, 410011, Hunan, China
| | - Xiaomeng Xia
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, NO.139 Middle Renmin Road, Changsha, 410011, Hunan, China
| | - Tingting Zhang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, NO.139 Middle Renmin Road, Changsha, 410011, Hunan, China
| | - Xiaoling Fang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, NO.139 Middle Renmin Road, Changsha, 410011, Hunan, China.
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3
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Wang H, Laskin G, He W, Boschker H, Yi M, Braun W, Fenk B, Srot V, Mannhart J, van Aken PA. Lattice Anisotropy, Oxygen Octahedral Rotation and Tunable Magnetic Anisotropy in Patterned SrRuO3 Quantum Structures. Microsc Microanal 2023; 29:1650. [PMID: 37613913 DOI: 10.1093/micmic/ozad067.849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- H Wang
- Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - G Laskin
- Fraunhofer IPM, Freiburg, Germany
| | - W He
- Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - H Boschker
- Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - M Yi
- Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - W Braun
- Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - B Fenk
- Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - V Srot
- Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - J Mannhart
- Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - P A van Aken
- Max Planck Institute for Solid State Research, Stuttgart, Germany
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Tong Q, Yan D, Cao Y, Dong X, Abula Y, Yang H, Kong P, Yi M. NVS-ZP7-4 inhibits hepatocellular carcinoma tumorigenesis and promotes apoptosis via PI3K/AKT signaling. Sci Rep 2023; 13:11795. [PMID: 37479837 PMCID: PMC10362011 DOI: 10.1038/s41598-023-38596-7] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 07/11/2023] [Indexed: 07/23/2023] Open
Abstract
NVS-ZP7-4 was identified as a novel chemical reagent targeting the zinc input protein ZIP7, which accounts for the zinc surge from the apparatus to the cytoplasm. Since zinc dysregulation is related to multiple diseases, in this study, we aimed to identify the anti-tumor effects of NVS-ZP7-4 and explore the molecular mechanisms of NVS-ZP7-4 in hepatocellular carcinoma (HCC) progression. We found that NVS-ZP7-4 inhibited cell viability, caused cell cycle arrest, induced apoptosis, and inhibited the proliferation, migration, and invasion of HCCLM3 and Huh7 cells. We further investigated the inhibited activation of the phosphatidylinositol 3-kinase (PI3K)/Akt pathway was involved in the antitumor effect of NVS-ZP7-4 in HCC. Furthermore, NVS-ZP7-4 inhibited HCC tumor growth in vivo. The present study demonstrated that NVS-ZP7-4 is a promising therapeutic target for HCC by regulating PI3K/AKT signaling.
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Affiliation(s)
- Qing Tong
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Dong Yan
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Yan Cao
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Xiaogang Dong
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Yimamumaimaitijiang Abula
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Huan Yang
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Panpan Kong
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Mingyu Yi
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
- Department of Anesthesiology, The Third Xiangya Hospital of Central South University, No. 138, Tongzipo Road, Changsha City, 410000, Hunan, China.
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5
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Zhang Y, Yi M, Tan Y, Hu C. Variants of Candidate Genes Associated with the Risk of Obstructive Sleep Apnea. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.779] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tong Q, Yi M, Kong P, Xu L, Huang W, Niu Y, Gan X, Zhan H, Tian R, Yan D. TRIM36 inhibits tumorigenesis through the Wnt/β-catenin pathway and promotes caspase-dependent apoptosis in hepatocellular carcinoma. Cancer Cell Int 2022; 22:278. [PMID: 36068629 PMCID: PMC9450375 DOI: 10.1186/s12935-022-02692-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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 08/22/2022] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is the most common type of primary liver cancer and has an extremely poor prognosis. We aimed to determine the latent relationships between TRIM36 regulation of apoptosis and the Wnt/β-catenin pathway in HCC. METHODS Immunohistochemistry and western blotting were used to characterize the aberrant expression of TRIM36 in HCC and adjacent tissues. Clinical information was analyzed using Kaplan-Meier and Cox methods. RNA-seq of potential targets was conducted to detect the regulation of TRIM36. Apoptosis assays and cellular proliferation, invasion and migration were conducted in a loss- and gain-of-function manner in cultured cells to determine the biological functions of TRIM36. A rescue experiment was conducted to confirm the role of Wnt/β-catenin signaling in TRIM36 regulation. Finally, in vivo experiments were conducted using cell line-derived xenografts in nude mice to validate the central role of TRIM36 in HCC. RESULTS TRIM36 expression was significantly downregulated in HCC tissues compared to adjacent non-tumor tissues. TRIM36 repressed the proliferation, migration, and invasion of Huh7 and HCCLM3 cells, whereas it stimulated apoptosis. Wnt/β-catenin signaling was inhibited by TRIM36, and rescue experiments highlighted its importance in HCC proliferation, migration, and invasion. In vivo experiments further confirmed the effects of sh-TRIM36 on HCC tumorigenesis, inhibition of apoptosis, and promotion of Wnt/β-catenin signaling. CONCLUSION Our study is the first to indicate that TRIM36 acts as a tumor suppressor in HCC. TRIM36 activates apoptosis and inhibits cellular proliferation, invasion, and migration via the Wnt/β-catenin pathway, which may serve as an important biomarker and promising therapeutic target for HCC.
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Affiliation(s)
- Qing Tong
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, 830011, Xinjiang, China
- The Third Affiliated, Teaching Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Mingyu Yi
- The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Panpan Kong
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, 830011, Xinjiang, China
| | - Lin Xu
- 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
| | - Wukui Huang
- The Third Affiliated, Teaching Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Yue Niu
- The Third Affiliated, Teaching Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Xiaojing Gan
- The Third Affiliated, Teaching Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Huan Zhan
- The Third Affiliated, Teaching Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Rui Tian
- Department of Biliary-Pancreatic Surgery, Affiliated Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Dong Yan
- Department of Hepatopancreatobiliary Surgery, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi, 830011, Xinjiang, China.
- The Third Affiliated, Teaching Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
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7
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Yang Y, Jiang L, Wang S, Chen H, Yi M, Wu Y, Li Z, Fang X. A comprehensive pan-cancer analysis on the immunological role and prognostic value of TYMP in human cancers. Transl Cancer Res 2022; 11:3187-3208. [PMID: 36237259 PMCID: PMC9552085 DOI: 10.21037/tcr-22-502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 07/01/2022] [Indexed: 11/06/2022]
Abstract
Background Methods Results Conclusions
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Affiliation(s)
- Yalan Yang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Li Jiang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Sixue Wang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Huan Chen
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Mingyu Yi
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Yuqing Wu
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Zeying Li
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Xiaoling Fang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
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8
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Wang S, Wang X, Xia X, Zhang T, Yi M, Li Z, Jiang L, Yang Y, Fu J, Fang X. Identification of the immune subtype of ovarian cancer patients by integrated analyses of transcriptome and single-cell sequencing data. Sci Rep 2022; 12:13296. [PMID: 35918500 PMCID: PMC9346122 DOI: 10.1038/s41598-022-17645-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 07/28/2022] [Indexed: 11/09/2022] Open
Abstract
Ovarian cancer (OC) is one the most life-threatening cancers affecting women's health worldwide. Immunotherapy has become a promising treatment for a variety of cancers, but the therapeutic effects in OC remain limited. In this study, we constructed a macrophage risk score (MRS) based on M1 and M2 macrophages and a gene risk score (GRS) based on the prognostic genes associated with MRS. Next, cell-cell communication analysis was performed using single-cell RNA (scRNA) sequencing data. Survival status and immune characteristics were compared between the high- and low-score groups separated by MRS or GRS. Our results suggested that MRS and GRS can identify the immune subtypes of OC patients with better overall survival (OS) and inflammatory immune microenvironment. Moreover, M1 and M2 macrophages may affect the prognosis of OC patients through signal communication with CD8 T cells. Finally, functional differences between the two groups separated by GRS were elucidated. Taken together, this study constructed two useful models for the identification of immune subtypes in OC, which has a better prognosis and may have a sensitive response to immune checkpoint inhibitors (ICIs). The hub genes for the construction of GRS may be potential synergetic targets for immunotherapy in OC patients.
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Affiliation(s)
- Sixue Wang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Xi Wang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Xiaomeng Xia
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Tingting Zhang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Mingyu Yi
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Zeying Li
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Li Jiang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Yalan Yang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Jie Fu
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, China.
| | - Xiaoling Fang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, China.
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9
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Xu HL, Liu C, Yi M, Chen SM, Yu Y, Liu SX, Wen FQ, Yuan XL. [Neuroblastoma in a boy with Simpson-Golabi-Behmel syndrome]. Zhonghua Er Ke Za Zhi 2022; 60:244-245. [PMID: 35240747 DOI: 10.3760/cma.j.cn112140-20210708-00565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- H L Xu
- Department of Hematology and Oncology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - C Liu
- Department of Hematology and Oncology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - M Yi
- Department of Hematology and Oncology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - S M Chen
- Department of Hematology and Oncology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - Y Yu
- Department of Hematology and Oncology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - S X Liu
- Department of Hematology and Oncology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - F Q Wen
- Department of Hematology and Oncology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - X L Yuan
- Department of Hematology and Oncology, Shenzhen Children's Hospital, Shenzhen 518038, China
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10
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Yang Y, Foster JT, Yi M, Zhan L, Zhang Y, Zhou B, Jiang J, Mei L. Phenotypic homogeneity of emetic Bacillus cereus isolates in China. Lett Appl Microbiol 2021; 73:646-651. [PMID: 34173253 DOI: 10.1111/lam.13527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 06/10/2021] [Accepted: 06/14/2021] [Indexed: 11/26/2022]
Abstract
Emetic Bacillus cereus strains produce a potent cereulide cytotoxin, which can cause acute and fatal cases of food poisoning. We isolated 18 emetic B. cereus strains from a food poisoning event, and from clinical and non-random food surveillance in China and phenotypic characteristics of haemolysis, starch hydrolysis, salicin fermentation, gelatin liquefaction, cytotoxicity, and susceptibility to antibiotics were assessed. All isolates were positive for haemolysis and gelatin liquefaction, and negative for starch hydrolysis and salicin fermentation. Their haemolytic potentials were intermediate to Bacillus anthracis and B. cereus ATCC 14579 (a non-emetic strain). All isolates were cytotoxic to CHO, Hep-2, and Vero cells, and were sensitive to ampicillin. The homogeneous phenotypes of emetic isolates from China are similar to the corresponding traits of European and Japanese isolates that have been characterized, suggesting highly similar phenotypes of emetic B. cereus worldwide.
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Affiliation(s)
- Y Yang
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - J T Foster
- Pathogen and Microbiome Institute, Northern Arizona University, Flagstaff, AZ, USA
| | - M Yi
- Guangzhou Customs Technology Center, Guangzhou, China
| | - L Zhan
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Y Zhang
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - B Zhou
- Department of Science Technology and Information, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - J Jiang
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - L Mei
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
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Wang S, Yi M, Zhang X, Zhang T, Jiang L, Cao L, Zhou Y, Fang X. Effects of CDKN2B-AS1 on cellular proliferation, invasion and AKT3 expression are attenuated by miR-424-5p in a model of ovarian endometriosis. Reprod Biomed Online 2021; 42:1057-1066. [PMID: 33820740 DOI: 10.1016/j.rbmo.2021.02.004] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 02/09/2021] [Accepted: 02/09/2021] [Indexed: 01/17/2023]
Abstract
RESEARCH QUESTION Endometriosis is a common and complicated gynaecologic disease. Long non-coding RNA CDKN2B-AS1 plays a crucial role in the development and progression of several cancers. Whether CDKN2B-AS1 contributes to endometriosis, however, remains unknown. DESIGN Cellular proliferation, invasion and DNA synthesis abilities were assessed by CCK8, transwell and 5-ethynyle-2'-deoxyuridine assays. The expression of epithelial-mesenchymal transition markers and three isoforms of AKT was detected using Western blot. Real-time polymerase chain reaction was used to determine the relative expression levels of CDKN2B-AS1 and candidate miRNAs in ectopic, eutopic endometria and normal endometrial tissues. The relationship between CDKN2B-AS1 and miRNA was determined by luciferase reporter assays. RESULTS The relative expression level of CDKN2B-AS1 was up-regulated in eutopic and ectopic endometria. In endometrial stromal cells and Ishikawa cells, CDKN2B-AS1 overexpression promoted cellular proliferation and invasion, and increased the protein expression of vimentin but decreased the expression of E-cadherin. miR-424-5p was confirmed the target of CDKN2B-AS1 through bioinformatics tools and luciferase reporter assays. In addition, the enhanced effect of cellular phenotype of CDKN2B-AS1 overexpression was significantly attenuated by miR-424-5p overexpression. Furthermore, miR-424-5p was able to directly target AKT3 through luciferase reporter assay. Mechanistically, CDKN2B-AS1 acts as a ceRNA by sponging miR-424-5p and targets AKT3. CONCLUSIONS The cellular mechanism of CDKN2B-AS1 in endometriosis was confirmed; CDKN2B-AS1 may be a potential target for ovarian endometriosis therapy.
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Affiliation(s)
- Sixue Wang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha Hunan 410000, PR China
| | - Mingyu Yi
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha Hunan 410000, PR China
| | - Xinyue Zhang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha Hunan 410000, PR China
| | - Tingting Zhang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha Hunan 410000, PR China
| | - Li Jiang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha Hunan 410000, PR China
| | - Le Cao
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha Hunan 410000, PR China
| | - Yuxin Zhou
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha Hunan 410000, PR China
| | - Xiaoling Fang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha Hunan 410000, PR China.
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12
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Zhang X, Bao B, Wang S, Yi M, Jiang L, Fang X. Sentinel lymph node biopsy in early stage cervical cancer: A meta-analysis. Cancer Med 2020; 10:2590-2600. [PMID: 33314779 PMCID: PMC8026927 DOI: 10.1002/cam4.3645] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 09/01/2020] [Revised: 11/10/2020] [Accepted: 11/13/2020] [Indexed: 11/24/2022] Open
Abstract
Background The aim of this study was to determine the specific side detection rate of the sentinel lymph node biopsy and the accuracy in predicting lymph node metastasis in early stage cervical cancer. Methods A systematic search of databases was performed from the inception of the databases to 27 June 2020. Studies of cervical cancer patients with FIGO stage FIGO ⅠA~ⅡB, evaluating the sentinel lymph node biopsy with blue dye, technetium 99, combined technique (blue dye with technetium 99) or indocyanine green with a reference standard of systematic pelvis lymph node dissection or clinical follow‐up were included. Stata12.0 and Meta‐Disc 1.4 were used for the meta‐analysis. Results Of 2825 articles found, 21 studies (2234 women) were eventually included. Out of 21 studies, 20 met the detection rate evaluation criteria and six were included for sensitivity meta‐analysis. Due to heterogeneity, it was inappropriate to pool all studies. The pooled specific side detection rates were 85% in tumors up to 2 cm, 67% in tumors over 2 cm, 75.2% for blue dye, 74.7% for technetium 99, 84% for combined technique, and 85.5% for indocyanine green. The sentinel lymph node biopsy had a pooled specific side sensitivity of 88%. Adverse effects of sentinel lymph node biopsy appear minimal for most patients and are mainly related to the injection of blue dye. Conclusions Sentinel lymph node biopsy using a tracer with a high detection rate and ultrastaging is highly accurate and reliable when limited to seriously selected patients, with satisfactory bilateral lymph node mapping and where enough cases for learning curve optimization exist. Indocyanine green sentinel lymph node mapping seems to be a superior sentinel lymph node mapping technique compared to other methods at present.
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Affiliation(s)
- Xinyue Zhang
- Department of Gynecology and Obstetrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Bingting Bao
- Department of Gynecology and Obstetrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Sixue Wang
- Department of Gynecology and Obstetrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Mingyu Yi
- Department of Gynecology and Obstetrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Li Jiang
- Department of Gynecology and Obstetrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Xiaoling Fang
- Department of Gynecology and Obstetrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
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13
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Ewane E, Yi M, Akhtar A, Brewster AM, McNeil-Haughton L, Hunt KK, Black DM. Abstract D056: Differences in breast cancer survival by race, age, and tumor estrogen receptor status. Cancer Epidemiol Biomarkers Prev 2020. [DOI: 10.1158/1538-7755.disp19-d056] [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: 11/16/2022] Open
Abstract
Abstract
Background: Breast cancer survival advancement can be ascribed to various efforts including community screening programs and educational outreach resulting in earlier diagnosis, treatment advances, and more accessible care. However, racial disparities continue to persist. Identification of populations susceptible to adverse health outcomes is substantial to construct health disparities resolutions. The purpose of the study is to identify trends in breast cancer disease specific survival (DSS) in black patients compared to white patients by age at diagnosis, year of diagnosis, and tumor estrogen receptor (ER) status. Methods: The Surveillance, Epidemiology, and End Results database was utilized to identify patients of black or white race diagnosed with stage I-III, ER positive (+) or ER negative (-) breast cancer between 1990 and 2009. The Kaplan-Meier method was used to determine 14-year breast cancer DSS. Changes in DSS were analyzed over the study’s time period and in 3 age groups to evaluate women who were of pre-menopausal age (< 50 years), perimenopausal or postmenopausal and of the average age for breast cancer diagnosis (50-64 years), and elderly (65 + years). Results: The total study sample was 344,142 patients; 309,415 identified as white (89.9%) and 34,727 identified as black (10.1%) women. All patients diagnosed most recently had stable or improving DSS (p<0.05). White patients with ER+ or ER- disease had significantly higher DSS compared to blacks in all age groups and years of diagnosis (p<0.05); more specifically all black patients diagnosed in 2005-2009, had significantly lower disease specific survival (DSS) compared to white patients diagnosed a decade earlier in 1995-1999 (p<0.05). For women 65+ with ER+ cancer, black patients diagnosed between 2005-2009 had a DSS of 86% compared to 91% in white patients diagnosed between 1995-2000. In ER- patients less than 50 years of age, black patients diagnosed between 2005-2009 had 78% DSS compared to white patient DSS of 84% within the same period. Among black patients, young women <50 years of age ER+ and ER- women aged 50-64 years had consistent and most improvement in DSS over the study’s 4 time intervals; for ER+ cancer, DSS was 68% for those diagnosed in 1990-1994, 71% for 1995-1999, 75% for 2000-2005, and 79% for 2006-2009 and for ER- cancer, the DSS was 60% for those diagnosed in 1990-1994, 67% for 1995-1999, and 72% for 2000-2005, and 75% for 2006-2009 (p<0.05). Conclusion: Improvements in breast cancer DSS are evidenced in black and white women, most especially black patients < 50 years of age with ER+ and 50-64 with ER- disease. However, findings demonstrate DSS remain lower in all black patients compared to white patients, independent of year of diagnosis, age, and tumor receptor status. Continued efforts are crucial to identify and address the causes of continued disparities in breast cancer DSS, particularly in subsets of black patients not having survival improvements.
Citation Format: Ewune Ewane, M Yi, A Akhtar, A M Brewster, Lorna McNeil-Haughton, Kelly K Hunt, Dalliah M Black. Differences in breast cancer survival by race, age, and tumor estrogen receptor status [abstract]. In: Proceedings of the Twelfth AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2019 Sep 20-23; San Francisco, CA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2020;29(6 Suppl_2):Abstract nr D056.
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Affiliation(s)
- Ewune Ewane
- UT Health M.D. Anderson Cancer Center, Houston, TX, USA
| | - M Yi
- UT Health M.D. Anderson Cancer Center, Houston, TX, USA
| | - A Akhtar
- UT Health M.D. Anderson Cancer Center, Houston, TX, USA
| | - A M Brewster
- UT Health M.D. Anderson Cancer Center, Houston, TX, USA
| | | | - Kelly K Hunt
- UT Health M.D. Anderson Cancer Center, Houston, TX, USA
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14
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Cai J, Liu C, Yi M, Tan Y, Chen S, Ren N, Cheng H, Li X, Xiong W, Li G, Wu M, Wang W, Xiang B. The tumor suppressor NOR1 suppresses cell growth, invasiveness, and tumorigenicity in glioma. Neoplasma 2020; 67:851-860. [PMID: 32241159 DOI: 10.4149/neo_2020_190724n661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 11/13/2019] [Indexed: 11/08/2022]
Abstract
Oxidored-nitro domain-containing protein 1 (NOR1) is a tumor suppressor downregulated in various human cancers, including nasopharyngeal carcinoma (NPC), lung cancer, and testicular cancer. NOR1 protein is highly expressed in the normal brain; however, its role in brain tumors remains unknown. In this study, we demonstrated that the NOR1 protein level was decreased in glioma tissue samples as compared to its normal counterpart. Exogenously expressed NOR1 protein in glioma U251 cells inhibits tumor cell proliferation, migration, and invasion. Re-expression of NOR1 induced cell cycle S to G2 phase arrest and suppressed its tumorigenicity in nude mice. Overexpression of NOR1 in U251 cells also led to a decrease of Ki67 expression in xenografts. Transcriptomic analysis revealed that NOR1 expression altered the expression of genes favored cell proliferation. Among the differentially expressed genes, FOXR2, a member of the FOX gene family, which promotes glioma progression, was decreased in NOR1 expressing cells. The downregulation of FOXR2 by NOR1 was validated in vitro and in vivo. Our findings suggest for the first time that NOR1 suppresses glioma progression via modulating the FOXR2 expression.
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Affiliation(s)
- J Cai
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China.,Cancer Research Institute, Xiangya School of Medicine, Central South University, Changsha, China
| | - C Liu
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China.,Cancer Research Institute, Xiangya School of Medicine, Central South University, Changsha, China
| | - M Yi
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China
| | - Y Tan
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, China
| | - S Chen
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China.,Cancer Research Institute, Xiangya School of Medicine, Central South University, Changsha, China
| | - N Ren
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China
| | - H Cheng
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China
| | - X Li
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China.,Cancer Research Institute, Xiangya School of Medicine, Central South University, Changsha, China
| | - W Xiong
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China.,Cancer Research Institute, Xiangya School of Medicine, Central South University, Changsha, China
| | - G Li
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China.,Cancer Research Institute, Xiangya School of Medicine, Central South University, Changsha, China
| | - M Wu
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China.,Cancer Research Institute, Xiangya School of Medicine, Central South University, Changsha, China
| | - W Wang
- Department of Pathology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, China
| | - B Xiang
- Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, China.,Cancer Research Institute, Xiangya School of Medicine, Central South University, Changsha, China
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15
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Wei Z, Zhang M, Zhang X, Yi M, Xia X, Fang X. NAT2 gene polymorphisms and endometriosis risk: A PRISMA-compliant meta-analysis. PLoS One 2019; 14:e0227043. [PMID: 31881062 PMCID: PMC6934289 DOI: 10.1371/journal.pone.0227043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 12/11/2019] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVE Endometriosis is a common chronic, gynecological disease. Despite many studies on the role of N-acetyltransferase 2 (NAT2) in endometriosis, its clinical significance is unclear. In this study, associations between NAT2 phenotypes as well as single nucleotide polymorphisms (SNPs) within NAT2 (i.e. rs1799929, rs1799930, rs1208, and rs1799931) and endometriosis risk were evaluated using a meta-analysis approach. METHODS Embase, PubMed, ClinicalTrials.gov, CNKI (China National Knowledge Infrastructure), Wanfang databases, Cochrane Library for clinical trials, and Web of Science were searched to identify relevant articles. ORs (odds ratios) and 95% CIs (95% confidence intervals) were used to estimate the associations between NAT2 polymorphisms and endometriosis risk. Heterogeneity among included studies was also assessed. In addition, a subgroup analysis of NAT2 phenotypes and endometriosis risk based on ethnicity was performed. RESULTS Nine case-control studies met the inclusion criteria. The odds ratio was 2.30 (95% CI: 1.61-3.28) for the NAT2 slow acetylation phenotype versus the intermediate + fast acetylation phenotype in the Asian population. These results suggest that Asian individuals with the NAT2 slow acetylation phenotype have a 130% increased risk of endometriosis. A significant association was also found for rs1799930 (OR = 0.74; 95% CI, 0.59-0.92), suggesting that individuals with this mutant genotype have a 26% decreased risk of endometriosis. CONCLUSIONS The rs1799930 mutant genotypes are associated with a decreased risk of endometriosis. No statistically significant associations were found between rs1799931, rs1208, or rs1799929 and endometriosis. Based on a subgroup analysis based on ethnicity, the NAT2 slow acetylation phenotype was found to increase the risk of endometriosis in Asians. No statistically significant associations were found between the NAT2 slow acetylation phenotype and endometriosis risk in Caucasians. Accordingly, NAT2 phenotypes and SNPs are potential biomarkers for the diagnosis and treatment of endometriosis.
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Affiliation(s)
- Zhangming Wei
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Mengmeng Zhang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Xinyue Zhang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Mingyu Yi
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Xiaomeng Xia
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Xiaoling Fang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
- * E-mail:
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16
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Ding L, Yang Z, Liu G, Ran N, Yi M, Li H, Zhao H, Tang L, Cheng H, Zhao J, Zhang Y, Ji X, Liu S. Safety and efficacy of taurine as an add-on treatment for tics in youngsters. Eur J Neurol 2019; 27:490-497. [PMID: 31618495 DOI: 10.1111/ene.14107] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 10/14/2019] [Indexed: 01/19/2023]
Abstract
BACKGROUND AND PURPOSE The pathophysiological model of tics generally describes disruption of γ-aminobutyric acid transmission, and taurine is found to be an agonist of γ-aminobutyric acid receptors. The study aimed to evaluate the safety and efficacy of taurine as an add-on treatment for tics. METHODS Four hundred and four youngsters with tic disorders were randomly assigned to 12 weeks of either oral taurine or placebo. The Yale Global Tic Severity Scale was used to measure tic severity. The primary outcome measure was global severity scores reduced by more than 60% compared with baseline scores. RESULTS Three hundred and eighty-two patients were successfully treated. At week 4, no significant differences were found in the treatment effect and the total occurrence of adverse drug reactions between the taurine and placebo groups. At week 12, the proportion of significant improvement in tics was significantly higher in the taurine group than the placebo group (53.4% with taurine versus 34.5% without taurine; relative risk 1.546; P < 0.001), and no group differences were found in the total occurrence of adverse drug reactions. CONCLUSIONS Taurine is safe and effective for tics.
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Affiliation(s)
- L Ding
- Department of Epidemiology and Health Statistics, The Affiliated Hospital of Qingdao University, Qingdao, China.,Department of Medical Management, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Z Yang
- Department of Child Health Care, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - G Liu
- Department of Epidemiology and Health Statistics, The Affiliated Hospital of Qingdao University, Qingdao, China.,Department of Outpatient Administration, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - N Ran
- Department of Child Health Care, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - M Yi
- Department of Child Health Care, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - H Li
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - H Zhao
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - L Tang
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - H Cheng
- Department of Customer Service, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - J Zhao
- Department of Pharmacology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Y Zhang
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - X Ji
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - S Liu
- Department of Prenatal Diagnosis, The Affiliated Hospital of Qingdao University, Qingdao, China
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17
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Chesney J, Puzanov I, Collichio F, Singh P, Milhem M, Glaspy J, Hamid O, Ross M, Friedlander P, Garbe C, Logan T, Hauschild A, Lebbe C, Yi M, Sharma A, Mehnert J. Talimogene laherparepvec (T-VEC) in combination (combo) with ipilimumab (ipi) versus ipi alone for advanced melanoma: 3-year landmark analysis of a randomized, open-label, phase II trial. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz394.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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18
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Pfau H, Chen SD, Yi M, Hashimoto M, Rotundu CR, Palmstrom JC, Chen T, Dai PC, Straquadine J, Hristov A, Birgeneau RJ, Fisher IR, Lu D, Shen ZX. Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors. Phys Rev Lett 2019; 123:066402. [PMID: 31491189 DOI: 10.1103/physrevlett.123.066402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Indexed: 06/10/2023]
Abstract
The momentum dependence of the nematic order parameter is an important ingredient in the microscopic description of iron-based high-temperature superconductors. While recent reports on FeSe indicate that the nematic order parameter changes sign between electron and hole bands, detailed knowledge is still missing for other compounds. Combining angle-resolved photoemission spectroscopy with uniaxial strain tuning, we measure the nematic band splitting in both FeSe and BaFe_{2}As_{2} without interference from either twinning or magnetic order. We find that the nematic order parameter exhibits the same momentum dependence in both compounds with a sign change between the Brillouin center and the corner. This suggests that the same microscopic mechanism drives the nematic order in spite of the very different phase diagrams.
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Affiliation(s)
- H Pfau
- Stanford Institute of Materials and Energy Sience, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - S D Chen
- Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, 94305 California, USA
| | - M Yi
- Department of Physics, University of California, Berkeley, 94720 California, USA
- Department of Physics and Astronomy, Rice University, Houston, 77005 Texas, USA
| | - M Hashimoto
- Stanford Synchrotron Radiation Lightsource, SLAC National Acelerator Laboratory, Menlo Park, 94025 California, USA
| | - C R Rotundu
- Stanford Institute of Materials and Energy Sience, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - J C Palmstrom
- Stanford Institute of Materials and Energy Sience, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, 94305 California, USA
| | - T Chen
- Department of Physics and Astronomy, Rice University, Houston, 77005 Texas, USA
| | - P-C Dai
- Department of Physics and Astronomy, Rice University, Houston, 77005 Texas, USA
| | - J Straquadine
- Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, 94305 California, USA
| | - A Hristov
- Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, 94305 California, USA
| | - R J Birgeneau
- Department of Physics, University of California, Berkeley, 94720 California, USA
| | - I R Fisher
- Stanford Institute of Materials and Energy Sience, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, 94305 California, USA
| | - D Lu
- Stanford Synchrotron Radiation Lightsource, SLAC National Acelerator Laboratory, Menlo Park, 94025 California, USA
| | - Z-X Shen
- Stanford Institute of Materials and Energy Sience, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, 94305 California, USA
- Department of Physics, Stanford University, Stanford, 94305 California, USA
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19
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Molassiotis A, Yates P, Li Q, So W, Pongthavornkamol K, Pittayapan P, Komatsu H, Thandar M, Yi M, Titus Chacko S, Lopez V, Butcon J, Wyld D, Chan R. Corrections to “Mapping unmet supportive care needs, quality-of-life perceptions and current symptoms in cancer survivors across the Asia-Pacific region: results from the International STEP Study”. Ann Oncol 2019; 30:493. [DOI: 10.1093/annonc/mdy094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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20
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Yamazaki N, Koga H, Kojima T, Tsutsumida A, Namikawa K, Yi M, Mera K, Pickett-Gies C. Early safety from a phase I, multicenter, open-label, dose de-escalation study of talimogene laherparepvec (T-VEC) in Japanese patients (pts) with unresectable stage IIIB-IV melanoma (MEL). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy439.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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21
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Chen S, Yang H, Wu M, Wei X, Ou H, Yi M, Meng Y, Lin Z, Huang H, Yao M. Relationship between Expression of ERCC1 and Effect of Cisplatin Concurrent Chemoradiation in Stage II-IIIA Nasopharyngeal Carcinoma. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.735] [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: 11/26/2022]
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22
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He N, Yan YY, Ying YQ, Yi M, Yao GQ, Ge QG, Zhai SD. [Individualized vancomycin dosing for a patient diagnosed as severe acute pancreatitis with concurrent extracorporeal membrane oxygenation and continuous veno-venous hemofiltration therapy: a case report]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:915-920. [PMID: 30337758] [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: 06/08/2023]
Abstract
Pharmacokinetic parameters can be significantly altered for acute kidney injury (AKI), extracorporeal membrane oxygenation (ECMO) and continuous veno-venous hemofiltration therapy (CVVH). Here we reported a case of individualized vancomycin dosing for a patient diagnosed as severe acute pancreatitis treated with concurrent ECMO and CVVH. A 65 kg 32-year-old woman was admitted to hospital presented with severe acute pancreatitis (SAP), respiratory failure, metabotropic acidosis and hyperkalemia. She was admitted to intensive care unit (ICU) on hospital day 1 and was initiated on CVVH. She progressed to multiple organ dysfunction syndrome (MODS) and acute respiratory distress syndrome (ARDS) on ICU day 2, and veno-venous ECMO was instituted. Several catheters were inserted into the body to support ECMO, CVVH and pulse indicator continuous cardiac output (PiCCO), so vancomycin was prescribed empirically on ICU day 3 for prevention of catheter-related infection. Given the residual renal function and continuous hemofiltration intensity on day 3, vancomycin bolus of 1 000 mg was prescribed, followed by a maintenance dose of 500 mg every 8 hours. On ICU day 4, a vancomycin trough serum concentration of 14.1 mg/L was obtained before the fourth dose, which was within the target range of 10-20 mg/L. By ICU day 7, vancomycin dosage was elevated to 1.0 g every 12 hours because of aggravated infection and improved kidney function. On ICU day 14, a vancomycin trough serum concentration of 17 mg/L was obtained. Her white blood cell (WBC) and neutrophil percentage (Neut%) dropped to the normal level by ICU day 19. This vancomycin regimen was successful in providing a target attainment of trough serum concentration ranging from 10-20 mg/L quickly and in controlling infection-related symptoms and signs properly. With the help of this case report we want to call attention to the clinically significant alteration in vancomycin pharmacokinetics among critically ill patients. Individualized vancomycin dosing regimens and therapeutic drug monitoring are necessary for critically ill patients receiving CVVH and ECMO to ensure that the target serum vancomycin levels are reached to adequately treat the infection and avoid nephrotoxicity.
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Affiliation(s)
- N He
- Department of Pharmacy, Peking University Third Hospital, Beijing 100191, China; Department of Pharmaceutical Administration and Clinical Pharmacy, Peking University School of Pharmaceutical Sciences, Beijing 100191, China
| | - Y Y Yan
- Department of Pharmacy, Peking University Third Hospital, Beijing 100191, China
| | - Y Q Ying
- Department of Pharmacy, Peking University Third Hospital, Beijing 100191, China
| | - M Yi
- Intensive Care Unit, Peking University Third Hospital, Beijing 100191, China
| | - G Q Yao
- Intensive Care Unit, Peking University Third Hospital, Beijing 100191, China
| | - Q G Ge
- Intensive Care Unit, Peking University Third Hospital, Beijing 100191, China
| | - S D Zhai
- Department of Pharmacy, Peking University Third Hospital, Beijing 100191, China
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23
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Yi M, Frano A, Lu DH, He Y, Wang M, Frandsen BA, Kemper AF, Yu R, Si Q, Wang L, He M, Hardy F, Schweiss P, Adelmann P, Wolf T, Hashimoto M, Mo SK, Hussain Z, Le Tacon M, Böhmer AE, Lee DH, Shen ZX, Meingast C, Birgeneau RJ. Spectral Evidence for Emergent Order in Ba_{1-x}Na_{x}Fe_{2}As_{2}. Phys Rev Lett 2018; 121:127001. [PMID: 30296157 DOI: 10.1103/physrevlett.121.127001] [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: 01/13/2018] [Revised: 07/05/2018] [Indexed: 06/08/2023]
Abstract
We report an angle-resolved photoemission spectroscopy study of the iron-based superconductor family, Ba_{1-x}Na_{x}Fe_{2}As_{2}. This system harbors the recently discovered double-Q magnetic order appearing in a reentrant C_{4} phase deep within the underdoped regime of the phase diagram that is otherwise dominated by the coupled nematic phase and collinear antiferromagnetic order. From a detailed temperature-dependence study, we identify the electronic response to the nematic phase in an orbital-dependent band shift that strictly follows the rotational symmetry of the lattice and disappears when the system restores C_{4} symmetry in the low temperature phase. In addition, we report the observation of a distinct electronic reconstruction that cannot be explained by the known electronic orders in the system.
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Affiliation(s)
- M Yi
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - A Frano
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - D H Lu
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Y He
- Stanford Institute of Materials and Energy Sciences, Stanford University, Stanford, California 94305, USA
- Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - Meng Wang
- School of Physics, Sun Yat-Sen University, Guangzhou 510275, China
| | - B A Frandsen
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A F Kemper
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
| | - R Yu
- Department of Physics, Renmin University of China, Beijing 100872, China
| | - Q Si
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - L Wang
- Institute for Solid State Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
- Kirchhoff-Institute for Physics, Universitt Heidelberg, D-69120 Heidelberg, Germany
| | - M He
- Institute for Solid State Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - F Hardy
- Institute for Solid State Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - P Schweiss
- Institute for Solid State Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - P Adelmann
- Institute for Solid State Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - T Wolf
- Institute for Solid State Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - M Hashimoto
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S-K Mo
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - Z Hussain
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - M Le Tacon
- Institute for Solid State Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - A E Böhmer
- Institute for Solid State Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - D-H Lee
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Z-X Shen
- Stanford Institute of Materials and Energy Sciences, Stanford University, Stanford, California 94305, USA
- Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - C Meingast
- Institute for Solid State Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - R J Birgeneau
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
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Karuturi M, Katherine C, Kimmel J, Yi M. The impact of dose delays and reductions on progression free survival (PFS) in older patients with metastatic breast cancer receiving palbocilib. Eur J Cancer 2018. [DOI: 10.1016/s0959-8049(18)30557-4] [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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King LM, Yi M, Krishnamurthy S, Hunt KK, Thompson AM. Abstract P4-15-10: Second breast events after DCIS: Where, what and when? Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p4-15-10] [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: 11/16/2022]
Abstract
Abstract
Background: Detection and diagnosis of ductal carcinoma in situ has substantially increased since the widespread use of mammographic screening with the incidence of DCIS increasing between 1975 from 5.8 per 100,000 to 33.8 per 100,000 women in 2010. While surgical resection of DCIS remains the main treatment, outcomes in terms of in breast re-occurrence or contralateral disease are unpredictable. Recently, three large clinical trials of active surveillance versus standard of care have been initiated. We sought to compare the clinical, imaging, histopathological features and treatment of DCIS for contemporary patients who subsequently developed a second in situ or invasive breast lesion among women treated within a single institution.
Methods: A contemporary prospective cohort study comprising 2,509 women treated for DCIS between 2000 and 2014 was examined for diagnostic imaging, surgery, pathology, adjuvant treatment and second breast events. Patients with primary bilateral DCIS or a bilateral second event were excluded as were patients with antecedent invasive breast cancer. Patients were grouped into two populations based on ipsilateral and contralateral second breast event.
Results: Amongst 2,509 women treated for DCIS between 2000 and 2014, of whom 146 had a second breast event (5.8%). 77 (52.7% of events, 3.07% overall) developed an ipsilateral second breast event (37 DCIS, 40 invasive breast cancer) and 69 (47.3%, 2.75%) patients developed a contralateral second breast lesion (34 DCIS, 35 invasive breast cancer). Patients who developed a contralateral second event were older than those who developed an ipsilateral second event (58 years vs. 52 years, p=0.003). Patients receiving segmental mastectomies were more likely to develop an ipsilateral second event than a contralateral event (85.7% vs. 60.9%, p=0.001). Patients who developed a second contralateral breast event were significantly older at diagnosis (63 years vs. 58 years, p=0.003). There was no significant difference in the number of (69 vs. 77) or time between contralateral and ipsilateral second breast events (5.2 years and 5.1 years, p=0.8) nor in the number of patients with invasive or in situ second events (75 vs. 71). Patients with ipsilateral second breasts events were more likely to undergo bilateral mastectomy than those with contralateral second events (15 vs. 2, p=0.003).
Conclusions: Following standard of care treatment for DCIS, 1 in 20 women develop further DCIS or invasive disease at a median of 5 years with very similar proportions of ipsilateral or contralateral and DCIS or invasive disease. Current trials of active surveillance should consider a median 5 years follow up as a critical time point for reporting results.
Key Words: Ductal carcinoma in situ, invasive breast cancer, population-based cohort, surgery, radiotherapy, endocrine therapy.
Citation Format: King LM, Yi M, Krishnamurthy S, Hunt KK, Thompson AM. Second breast events after DCIS: Where, what and when? [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P4-15-10.
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Affiliation(s)
- LM King
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - M Yi
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - S Krishnamurthy
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - KK Hunt
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - AM Thompson
- The University of Texas MD Anderson Cancer Center, Houston, TX
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Clifton KK, Kimmel J, Yi M, Chad B, Litton J, Debu T, Meghan K. Abstract P3-11-03: The impact of dose delays and reductions on toxicity and progression free survival (PFS) in patients receiving palbociclib. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p3-11-03] [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: 11/16/2022]
Abstract
Abstract
Background: Despite the high rates of neutropenia observed in the PALOMA studies, the incidence of neutropenic fevers remained low. The safety analysis from the PALOMA-3 trial showed no difference in PFS among pts who had dose reductions or delays secondary to neutropenia. We conducted a retrospective study to analyze the impact of dose delays and reductions on toxicity and progression free survival (PFS) in pts receiving palbociclib as standard of care.
Methods: Pts with metastatic ER positive breast cancer receiving palbociclib in any line of therapy were identified from a cohort at MD Anderson Cancer Center. Clinical, demographic, baseline labs, comorbidities and recurrence data were collected. Dose delays, dose reductions, and toxicities were recorded up to the first 6 cycles of palbociclib. Early dose delays and reductions were defined as events occurring during the first 2 cycles of palbociclib while late events were defined as cycles 3-6. Data was analyzed using Fischer's exact test for categorized variables and T test/Wilcoxon rank-sum test for continuous variables. PFS was analyzed using the Kaplan Meier method and Cox model was used to analyze factors associated with PFS.
Results: 344 pts who met eligibility criteria were included in the analysis. Pts receiving palbociclib on clinical trial were excluded. 109 (31.6%) pts received dose reductions and 153 (44.4%) experienced dose delays. The rate of neutropenic fever was low, occurring in 2.3% of all pts. There was a significant association between pts experiencing dose reductions and Hispanic race, baseline ANC, history of adjuvant endocrine therapy, adjuvant radiation therapy (XRT), and heart disease. History of adjuvant XRT, baseline ANC, and heart disease were associated with dose delays. Toxicities, including neutropenic fever, infections requiring antibiotics, and hospitalizations, were associated with dose reductions and dose delays. Median PFS for the cohort was 263.5 days. There was no significant association between early dose reductions or delays with PFS. Pts experiencing late dose delays (hazard ratio [HR], 0.4, P=0.0001) and reductions (HR, 0.4, P=0.0005) had a significantly longer PFS. Median PFS for pts without late dose delays was 228 days compared to 313.5 days for pts with late dose delays. Median PFS for pts without late dose reductions was 246 days compared to 305.5 days for pts with late dose reductions. In the multivariable analysis, liver metastasis, metastatic line, and higher tumor grade were associated with worse PFS. Pts receiving palbociclib and fulvestrant were found to have worse PFS than pts receiving palbociclib and letrozole.
Conclusions: Similar to the PALOMA trials, this study found that while the rate of toxicities such as neutropenic fever were low, dose reductions and delays were common. In pts receiving palbociclib as standard of care, pts with late dose reductions and delays had a longer PFS than those without dose reductions and delays. It is reassuring that the PFS was not negatively affected in pts with dose reductions and delays. As use of palbociclib as standard of care becomes more common, further larger retrospective studies are warranted to examine the impact of dose delays and reductions.
Citation Format: Clifton KK, Kimmel J, Yi M, Chad B, Litton J, Debu T, Meghan K. The impact of dose delays and reductions on toxicity and progression free survival (PFS) in patients receiving palbociclib [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P3-11-03.
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Affiliation(s)
| | - J Kimmel
- MD Anderson Cancer Center, Houston, TX
| | - M Yi
- MD Anderson Cancer Center, Houston, TX
| | - B Chad
- MD Anderson Cancer Center, Houston, TX
| | - J Litton
- MD Anderson Cancer Center, Houston, TX
| | - T Debu
- MD Anderson Cancer Center, Houston, TX
| | - K Meghan
- MD Anderson Cancer Center, Houston, TX
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Gerber S, Yang SL, Zhu D, Soifer H, Sobota JA, Rebec S, Lee JJ, Jia T, Moritz B, Jia C, Gauthier A, Li Y, Leuenberger D, Zhang Y, Chaix L, Li W, Jang H, Lee JS, Yi M, Dakovski GL, Song S, Glownia JM, Nelson S, Kim KW, Chuang YD, Hussain Z, Moore RG, Devereaux TP, Lee WS, Kirchmann PS, Shen ZX. Femtosecond electron-phonon lock-in by photoemission and x-ray free-electron laser. Science 2018; 357:71-75. [PMID: 28684521 DOI: 10.1126/science.aak9946] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 05/03/2017] [Indexed: 11/02/2022]
Abstract
The interactions that lead to the emergence of superconductivity in iron-based materials remain a subject of debate. It has been suggested that electron-electron correlations enhance electron-phonon coupling in iron selenide (FeSe) and related pnictides, but direct experimental verification has been lacking. Here we show that the electron-phonon coupling strength in FeSe can be quantified by combining two time-domain experiments into a "coherent lock-in" measurement in the terahertz regime. X-ray diffraction tracks the light-induced femtosecond coherent lattice motion at a single phonon frequency, and photoemission monitors the subsequent coherent changes in the electronic band structure. Comparison with theory reveals a strong enhancement of the coupling strength in FeSe owing to correlation effects. Given that the electron-phonon coupling affects superconductivity exponentially, this enhancement highlights the importance of the cooperative interplay between electron-electron and electron-phonon interactions.
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Affiliation(s)
- S Gerber
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,SwissFEL and Laboratory for Micro and Nanotechnology, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - S-L Yang
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - D Zhu
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - H Soifer
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - J A Sobota
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - S Rebec
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - J J Lee
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - T Jia
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - B Moritz
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - C Jia
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - A Gauthier
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - Y Li
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - D Leuenberger
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - Y Zhang
- International Center for Quantum Materials, Peking University, Beijing 100871, China
| | - L Chaix
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - W Li
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - H Jang
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - J-S Lee
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - M Yi
- Department of Physics, University of California-Berkeley, Berkeley, CA 94720, USA
| | - G L Dakovski
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - S Song
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - J M Glownia
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - S Nelson
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - K W Kim
- Department of Physics, Chungbuk National University, Cheongju 28644, Korea
| | - Y-D Chuang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Z Hussain
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - R G Moore
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - T P Devereaux
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - W-S Lee
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.
| | - P S Kirchmann
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.
| | - Z-X Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA. .,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
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Molassiotis A, Yates P, Li Q, So W, Pongthavornkamol K, Pittayapan P, Komatsu H, Thandar M, Yi M, Titus Chacko S, Lopez V, Butcon J, Wyld D, Chan R, Doolan M, Litam ME, Onofre R, Lluch C, Nacion R, Ombao ML, Soe ZW, Myint T, Ang E, Arao H, Yagasaki K, Ravindran V, Rhenius RV, Lucas A, Kujur LP, Princy A, Choi KC, Choy YP, Lee YP, Shiu CY, Xu Y. Mapping unmet supportive care needs, quality-of-life perceptions and current symptoms in cancer survivors across the Asia-Pacific region: results from the International STEP Study. Ann Oncol 2017; 28:2552-2558. [DOI: 10.1093/annonc/mdx350] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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Yi M, Parvez M, Cho S, Kim D, Jung J, Lee S, Shin JG. Identification of Functionally Defective CYP4F11 Genetic Variants in Erythromycin Metabolism and 20-Hete Synthesis. Clin Ther 2017. [DOI: 10.1016/j.clinthera.2017.05.188] [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: 11/28/2022]
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Yi M, Chen RP, Yang R, Chen H. Increased prevalence and risk of non-alcoholic fatty liver disease in overweight and obese patients with Type 2 diabetes in South China. Diabet Med 2017; 34:505-513. [PMID: 27334577 DOI: 10.1111/dme.13174] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/21/2016] [Indexed: 02/06/2023]
Abstract
AIMS To investigate the prevalence of and risk factors for non-alcoholic fatty liver disease in overweight and obese patients with Type 2 diabetes mellitus. METHODS We recruited patients with Type 2 diabetes with a BMI ≥ 24 kg/m2 , who visited the diabetes clinics of 60 hospitals in 21 cities in Guangdong Province, China from August 2011 to March 2012. Anthropometric measurements, biochemical tests and abdominal ultrasonography were performed for all the patients. RESULTS The study included 3861 patients (1860 men) with a mean ± sd (range) age of 58.91 ± 13.06 (18-90) years. Non-alcoholic fatty liver disease was found in 1751 patients (45.4%), with a significantly higher prevalence among men than women (48.0 vs 42.9%). The peak of non-alcoholic fatty liver disease prevalence was in patients with a BMI of 34-35 kg/m2 , those with a triglyceride/HDL cholesterol ratio of 5.5-6.0, men aged < 30 years and women aged 40-50 years. Assessment using the BARD (BMI, aspartate aminotransferase/alanine aminotransferase ratio, diabetes) score system showed that the prevalence of advanced fibrosis was 80.52% in all patients and that women had a higher prevalence than men (86.52 vs 74.16%). Multiple logistic regression analyses showed that dyslipidaemia, BMI and 2-h postprandial plasma glucose were independent risk factors for non-alcoholic fatty liver disease, while heart rate and female gender were protective factors. CONCLUSION The prevalence of non-alcoholic fatty liver disease in overweight and obese patients with Type 2 diabetes in South China is high. Multiple metabolic disorders were significantly associated with non-alcoholic fatty liver disease in overweight and obese patients with Type 2 diabetes.
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Affiliation(s)
- M Yi
- Department of Endocrinology, Zhujiang Hospital of Southern Medical University, Guangzhou City, Guangdong Province, China
| | - R-P Chen
- Department of Endocrinology, Zhujiang Hospital of Southern Medical University, Guangzhou City, Guangdong Province, China
| | - R Yang
- Department of Endocrinology, Zhujiang Hospital of Southern Medical University, Guangzhou City, Guangdong Province, China
| | - H Chen
- Department of Endocrinology, Zhujiang Hospital of Southern Medical University, Guangzhou City, Guangdong Province, China
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Mittendorf EA, Vila J, Yi M, Chavez-MacGregor M, Chen RL, Giordano SH, Hunt KK. Abstract P6-09-17: Evaluation of a risk score based on biologic factors to enhance prognostic stratification by the American Joint Committee on Cancer (AJCC) Staging System. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p6-09-17] [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: 11/16/2022]
Abstract
Abstract
Background: The 7th edition AJCC staging system provides prognostic information based on the anatomic extent of disease determined by the tumor size (T), lymph node status (N), and presence or absence of metastatic disease (M). Tumor biology, including grade, estrogen receptor (ER) status and HER2 status, which are known to have prognostic and predictive value, are not incorporated. This study was undertaken to evaluate a risk score that takes into account the tumor grade and other biomarkers that can be added to the current anatomic TNM staging system to improve stratification of patients with respect to disease specific survival (DSS) and overall survival (OS).
Methods: A prospectively maintained database was used to identify 3,327 patients with non-metastatic invasive breast cancer who underwent surgery as a first intervention from January 2007 through December 2013. Clinicopathologic data were recorded including: age, grade, ER status, HER2 status, and pathologic stage. Pathologic stage was determined according to the 7th edition of the AJCC staging guidelines. ER status was recorded as the percentage of cells staining positive by immunohistochemistry (IHC). Prior to 2010, tumors were classified as ER positive if there was >10% staining. A cut-off of 1% was used for patients treated after 2010, consistent with the change in American Society of Clinical Oncology (ASCO) guidelines. HER2 status was defined as positive if 3+ on immunohistochemistry or gene amplification was shown on fluorescence in situ hybridization. A risk score was calculated by assigning one point for each of the following tumor characteristics: ER-negative status, HER2 negative status and grade 3. Univariate survival analyses according to AJCC stage (I, IIA, IIB, IIIA and IIIC) and risk score (0-3) were performed for DSS and OS using the Kaplan Meier method.
Results: Median follow-up time was 5.0 years (range, 0.1 to 8.8). Five year DSS for the entire cohort was 97.9% (95% CI: 97.3%-98.4%). The distribution in risk score in the entire cohort was: risk score 0=81 (2.4%), 1=2289 (68.8%), 2=683 (20.5%), and 3= (8.3%). As shown in the table, for all AJCC stages, the 5-yr DSS and 5-yr OS varied according to risk score (p<.01).
StageRisk Scoren5-yr DSS (%)95% CI5-yr OS (%)95% CII (IA and IB)036100 9780.4-99.6 1117399.498.7-99.796.795.4-97.6 227498.896.4-00.694.691.0-06.8 311996.691.1-98.793.887.5-97.0IIA031100 96.879.2-99.5 163499.497.5-99.897.194.7-98.4 223697.593.2-99.194.188.7-97.0 39891.081.8-95.788.278.5-93.8IIB011100 100 130996.992.6-98.894.689.6-97.2 210792.983.6-97.189.380.1-94.4 34091.575.6-97.291.575.6-97.2IIIA03100 100 113498.388.2-99.891.582.6-96.0 25092.277.2-97.590.375.7-96.3 3768.621.3-91.268.621.3-91.2IIIC00 13992.272.1-98.084.463.7-93.9 21680.851.4-93.480.851.4-93.4 31033.36.3-64.633.36.2-64.6
Conclusion: The current study demonstrates that incorporating the risk score with current AJCC staging significantly improves the ability to stratify breast cancer patients with respect to DSS and OS. We recommend that the risk score be incorporated into the forthcoming revision of the AJCC staging system.
Citation Format: Mittendorf EA, Vila J, Yi M, Chavez-MacGregor M, Chen RL, Giordano SH, Hunt KK. Evaluation of a risk score based on biologic factors to enhance prognostic stratification by the American Joint Committee on Cancer (AJCC) Staging System [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P6-09-17.
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Affiliation(s)
- EA Mittendorf
- University of Texas MD Anderson Cancer Center, Houston, TX
| | - J Vila
- University of Texas MD Anderson Cancer Center, Houston, TX
| | - M Yi
- University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - RL Chen
- University of Texas MD Anderson Cancer Center, Houston, TX
| | - SH Giordano
- University of Texas MD Anderson Cancer Center, Houston, TX
| | - KK Hunt
- University of Texas MD Anderson Cancer Center, Houston, TX
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Guo X, Zhang J, Wu F, Zhang M, Yi M, Peng Y. Different subtype strains of Akkermansia muciniphila abundantly colonize in southern China. J Appl Microbiol 2016; 120:452-9. [PMID: 26666632 PMCID: PMC4736461 DOI: 10.1111/jam.13022] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 11/23/2015] [Accepted: 12/05/2015] [Indexed: 01/04/2023]
Abstract
Aim This study investigates the colonization rate of Akkermansia muciniphila in the gastrointestinal tracts of people living in southern China and applies a modified method for the isolation and subtyping of A. muciniphila strains from faecal samples. Methods and Results Fresh faecal samples were collected and bacterial DNA was extracted from these samples for real‐time PCR analysis. Strains were separated using a culture‐dependent sPCR‐directed method and classified using an enterobacterial repetitive intergenic consensus (ERIC‐PCR) DNA fingerprinting method. The colonization rate for the sample population from southern China was 51·74%. We isolated 22 strains from human faeces. The results revealed that all strains were identifiable as A. muciniphila with 99–100% identity to the type‐strain ATCC BAA‐835. ERIC‐PCR resulted in grouping of the DNA fingerprints showed that 12 distinct clusters were distinguished with a delineation level of 100%. Conclusions Southern China has a high rate of A. muciniphila colonization and over 12 different subtype strains reside in faecal samples. Significance and Impact of the Study Akkermansia muciniphila has a beneficial role in human gastrointestinal tract. These studies provide a better understanding of A. muciniphila and details of its colonization in the human gastrointestinal tract.
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Affiliation(s)
- X Guo
- Department of Laboratory Medicine, Zhu Jiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - J Zhang
- Department of Laboratory Medicine, Zhu Jiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - F Wu
- Department of Laboratory Medicine, Zhu Jiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - M Zhang
- Department of Laboratory Medicine, Zhu Jiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - M Yi
- Department of Endocrinology, Zhu Jiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Y Peng
- Department of Laboratory Medicine, Zhu Jiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
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33
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Zhang Y, Lee JJ, Moore RG, Li W, Yi M, Hashimoto M, Lu DH, Devereaux TP, Lee DH, Shen ZX. Superconducting Gap Anisotropy in Monolayer FeSe Thin Film. Phys Rev Lett 2016; 117:117001. [PMID: 27661715 DOI: 10.1103/physrevlett.117.117001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Indexed: 06/06/2023]
Abstract
Superconductivity originates from pairing of electrons near the Fermi energy. The Fermi surface topology and pairing symmetry are thus two pivotal characteristics of a superconductor. Superconductivity in one monolayer (1 ML) FeSe thin film has attracted great interest recently due to its intriguing interfacial properties and possibly high superconducting transition temperature over 65 K. Here, we report high-resolution measurements of the Fermi surface and superconducting gaps in 1 ML FeSe using angle-resolved photoemission spectroscopy. Two ellipselike electron pockets are clearly resolved overlapping with each other at the Brillouin zone corner. The superconducting gap is nodeless but moderately anisotropic, which puts strong constraint on determining the pairing symmetry. The gap maxima locate on the d_{xy} bands along the major axis of the ellipse and four gap minima are observed at the intersections of electron pockets. The gap maximum location combined with the Fermi surface geometry deviate from a single d-wave, extended s-wave or s_{±} gap function, suggesting an important role of the multiorbital nature of Fermi surface and orbital-dependent pairing in 1 ML FeSe. The gap minima location may be explained by a sign change on the electron pockets, or a competition between intra- and interorbital pairing.
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Affiliation(s)
- Y Zhang
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - J J Lee
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
| | - R G Moore
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - W Li
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Yi
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
| | - M Hashimoto
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - D H Lu
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - T P Devereaux
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
| | - D-H Lee
- Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
- Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Z-X Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
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34
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Deng MC, Li J, Hong YH, Xu XM, Chen WX, Yuan JP, Peng J, Yi M, Wang JH. Characterization of a novel biosurfactant produced by marine hydrocarbon-degrading bacterium Achromobacter sp. HZ01. J Appl Microbiol 2016; 120:889-99. [PMID: 26788863 DOI: 10.1111/jam.13065] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/11/2016] [Accepted: 01/14/2016] [Indexed: 11/29/2022]
Abstract
AIMS To purify and characterize the biosurfactants produced by Achromobacter sp. HZ01. METHODS AND RESULTS After fermentation, one biosurfactant was successfully purified from the fermentation broth of strain HZ01 by centrifugation, extraction using ethyl acetate, silica gel chromatography and reversed phase-high performance liquid chromatography. The critical micelle concentration (CMC) of the biosurfactant and the effects of temperatures, pH and salinities on its stability were determined. Fourier transform infrared spectroscopy, analysis of fatty acids and amino acids and mass spectrometry were used to characterize the biosurfactant. The maximum production yield of the crude biosurfactant reached to 6·84 g l(-1) after incubation for 96 h. Except the favourable adaptability to a wide range of temperatures, pH and salinities, the biosurfactant with a CMC value of 48 mg l(-1) could efficiently emulsify diverse hydrophobic compounds. The chemical formula of this biosurfactant was confirmed to be CH3 -(CH2 )17 -CHO-CH2 -CO-Gly-Gly-Leu-Met-Leu-Leu, in which the oxygen atom of group CHO linked to the last amino acid (Leu), a structure had never been reported before. CONCLUSIONS The purified biosurfactant is a novel cyclic lipopeptide. SIGNIFICANCE AND IMPACT OF THE STUDY One novel lipopeptide was purified and characterized. The novel biosurfactant exhibited good potential applications, such as bioremediation.
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Affiliation(s)
- M-C Deng
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, China.,Department of Food and Bioengineering, Guangdong Industry Technical College, Guangzhou, China
| | - J Li
- Department of Food and Bioengineering, Guangdong Industry Technical College, Guangzhou, China.,College of Environment and Energy, South China University of Technology, Guangzhou, China
| | - Y-H Hong
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, China
| | - X-M Xu
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, China
| | - W-X Chen
- Department of Food and Bioengineering, Guangdong Industry Technical College, Guangzhou, China
| | - J-P Yuan
- South China Sea Bioresource Exploitation and Utilization Collaborative Innovation Center, Sun Yat-Sen University, Guangzhou, China
| | - J Peng
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, China
| | - M Yi
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, China
| | - J-H Wang
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, China.,South China Sea Bioresource Exploitation and Utilization Collaborative Innovation Center, Sun Yat-Sen University, Guangzhou, China
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35
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Yi M, Wang M, Kemper AF, Mo SK, Hussain Z, Bourret-Courchesne E, Lanzara A, Hashimoto M, Lu DH, Shen ZX, Birgeneau RJ. Bandwidth and Electron Correlation-Tuned Superconductivity in Rb_{0.8}Fe_{2}(Se_{1-z}S_{z})_{2}. Phys Rev Lett 2015; 115:256403. [PMID: 26722933 DOI: 10.1103/physrevlett.115.256403] [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: 03/25/2015] [Indexed: 06/05/2023]
Abstract
We present a systematic angle-resolved photoemission spectroscopy study of the substitution dependence of the electronic structure of Rb_{0.8}Fe_{2}(Se_{1-z}S_{z})_{2} (z=0, 0.5, 1), where superconductivity is continuously suppressed into a metallic phase. Going from the nonsuperconducting Rb_{0.8}Fe_{2}S_{2} to superconducting Rb_{0.8}Fe_{2}Se_{2}, we observe little change of the Fermi surface topology, but a reduction of the overall bandwidth by a factor of 2. Hence, for these heavily electron-doped iron chalcogenides, we have identified electron correlation as explicitly manifested in the quasiparticle bandwidth to be the important tuning parameter for superconductivity, and that moderate correlation is essential to achieving high T_{C}.
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Affiliation(s)
- M Yi
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
| | - Meng Wang
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
| | - A F Kemper
- Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - S-K Mo
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Z Hussain
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - E Bourret-Courchesne
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A Lanzara
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M Hashimoto
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - D H Lu
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Z-X Shen
- Stanford Institute of Materials and Energy Sciences, Stanford University, Stanford, California 94305, USA
- Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - R J Birgeneau
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
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36
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Yi M, Liu ZK, Zhang Y, Yu R, Zhu JX, Lee JJ, Moore RG, Schmitt FT, Li W, Riggs SC, Chu JH, Lv B, Hu J, Hashimoto M, Mo SK, Hussain Z, Mao ZQ, Chu CW, Fisher IR, Si Q, Shen ZX, Lu DH. Observation of universal strong orbital-dependent correlation effects in iron chalcogenides. Nat Commun 2015. [PMID: 26204461 PMCID: PMC4525196 DOI: 10.1038/ncomms8777] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Establishing the appropriate theoretical framework for unconventional superconductivity in the iron-based materials requires correct understanding of both the electron correlation strength and the role of Fermi surfaces. This fundamental issue becomes especially relevant with the discovery of the iron chalcogenide superconductors. Here, we use angle-resolved photoemission spectroscopy to measure three representative iron chalcogenides, FeTe0.56Se0.44, monolayer FeSe grown on SrTiO3 and K0.76Fe1.72Se2. We show that these superconductors are all strongly correlated, with an orbital-selective strong renormalization in the dxy bands despite having drastically different Fermi surface topologies. Furthermore, raising temperature brings all three compounds from a metallic state to a phase where the dxy orbital loses all spectral weight while other orbitals remain itinerant. These observations establish that iron chalcogenides display universal orbital-selective strong correlations that are insensitive to the Fermi surface topology, and are close to an orbital-selective Mott phase, hence placing strong constraints for theoretical understanding of iron-based superconductors. A proper theoretical description for unconventional superconductivity in iron-based compounds remains elusive. Here, the authors, to capture the electron correlation strength and the role of Fermi surfaces, report ARPES measurements of three iron chalcogenide superconductors to establish universal features.
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Affiliation(s)
- M Yi
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - Z-K Liu
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - Y Zhang
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - R Yu
- 1] Department of Physics, Renmin University of China, Beijing 100872, China [2] Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - J-X Zhu
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - J J Lee
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - R G Moore
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA
| | - F T Schmitt
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA
| | - W Li
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA
| | - S C Riggs
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - J-H Chu
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA
| | - B Lv
- Department of Physics, Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA
| | - J Hu
- Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA
| | - M Hashimoto
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S-K Mo
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - Z Hussain
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - Z Q Mao
- Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA
| | - C W Chu
- Department of Physics, Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA
| | - I R Fisher
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - Q Si
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - Z-X Shen
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - D H Lu
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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37
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Gerber S, Kim KW, Zhang Y, Zhu D, Plonka N, Yi M, Dakovski GL, Leuenberger D, Kirchmann PS, Moore RG, Chollet M, Glownia JM, Feng Y, Lee JS, Mehta A, Kemper AF, Wolf T, Chuang YD, Hussain Z, Kao CC, Moritz B, Shen ZX, Devereaux TP, Lee WS. Direct characterization of photoinduced lattice dynamics in BaFe2As2. Nat Commun 2015; 6:7377. [PMID: 26051704 PMCID: PMC4468847 DOI: 10.1038/ncomms8377] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Accepted: 04/29/2015] [Indexed: 11/16/2022] Open
Abstract
Ultrafast light pulses can modify electronic properties of quantum materials by perturbing the underlying, intertwined degrees of freedom. In particular, iron-based superconductors exhibit a strong coupling among electronic nematic fluctuations, spins and the lattice, serving as a playground for ultrafast manipulation. Here we use time-resolved X-ray scattering to measure the lattice dynamics of photoexcited BaFe2As2. On optical excitation, no signature of an ultrafast change of the crystal symmetry is observed, but the lattice oscillates rapidly in time due to the coherent excitation of an A1g mode that modulates the Fe–As–Fe bond angle. We directly quantify the coherent lattice dynamics and show that even a small photoinduced lattice distortion can induce notable changes in the electronic and magnetic properties. Our analysis implies that transient structural modification can be an effective tool for manipulating the electronic properties of multi-orbital systems, where electronic instabilities are sensitive to the orbital character of bands. In BaFe2As2, the lattice couples strongly to the magnetic and electronic degrees of freedom, providing a way to control them. Here, by means of time-resolved X-ray scattering, the authors measure rapid lattice oscillations, which can induce changes in the material's electronic and magnetic properties.
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Affiliation(s)
- S Gerber
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - K W Kim
- Department of Physics, Chungbuk National University, 52 Naesudong-ro, Heungdeok-gu, Cheongju 361-763, Korea
| | - Y Zhang
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA.,Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA
| | - D Zhu
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - N Plonka
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA.,Departments of Physics and Applied Physics, Stanford University, 476 Lomita Mall, Stanford, California 94305, USA
| | - M Yi
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA.,Departments of Physics and Applied Physics, Stanford University, 476 Lomita Mall, Stanford, California 94305, USA
| | - G L Dakovski
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - D Leuenberger
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - P S Kirchmann
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R G Moore
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Chollet
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - J M Glownia
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Y Feng
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - J-S Lee
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A Mehta
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A F Kemper
- Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA
| | - T Wolf
- Institute for Solid State Physics, Karlsruhe Institute of Technology, Hermann-v.-Helmholtz-Platz 1, 76021 Karlsruhe, Germany
| | - Y-D Chuang
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA
| | - Z Hussain
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA
| | - C-C Kao
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - B Moritz
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Z-X Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA.,Departments of Physics and Applied Physics, Stanford University, 476 Lomita Mall, Stanford, California 94305, USA
| | - T P Devereaux
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - W-S Lee
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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38
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Zhou X, Wu S, Liu Q, Chen Z, Yi M. Effect of surface active agents on the rheological properties and solubility of layered double hydroxides-modified asphalt. ACTA ACUST UNITED AC 2015. [DOI: 10.1179/1432891714z.0000000001233] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- X. Zhou
- State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of Technology, Wuhan 430070, China
| | - S. Wu
- State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of Technology, Wuhan 430070, China
| | - Q. Liu
- State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of Technology, Wuhan 430070, China
| | - Z. Chen
- State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of Technology, Wuhan 430070, China
| | - M. Yi
- State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of Technology, Wuhan 430070, China
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39
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Cui YT, Moore RG, Zhang AM, Tian Y, Lee JJ, Schmitt FT, Zhang WH, Li W, Yi M, Liu ZK, Hashimoto M, Zhang Y, Lu DH, Devereaux TP, Wang LL, Ma XC, Zhang QM, Xue QK, Lee DH, Shen ZX. Interface ferroelectric transition near the gap-opening temperature in a single-unit-cell FeSe film grown on Nb-Doped SrTiO3 substrate. Phys Rev Lett 2015; 114:037002. [PMID: 25659015 DOI: 10.1103/physrevlett.114.037002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Indexed: 06/04/2023]
Abstract
We report findings of strong anomalies in both mutual inductance and inelastic Raman spectroscopy measurements of single-unit-cell FeSe film grown on Nb-doped SrTiO3, which occur near the temperature where the superconductinglike energy gap opens. Analysis suggests that the anomaly is associated with a broadened ferroelectric transition in a thin layer near the FeSe/SrTiO3 interface. The coincidence of the ferroelectric transition and gap-opening temperatures adds credence to the central role played by the film-substrate interaction on the strong Cooper pairing in this system. We discuss scenarios that could explain such a coincidence.
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Affiliation(s)
- Y-T Cui
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - R G Moore
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A-M Zhang
- Department of Physics, Renmin University of China, Beijing 100872, China
| | - Y Tian
- Department of Physics, Renmin University of China, Beijing 100872, China
| | - J J Lee
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - F T Schmitt
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - W-H Zhang
- State Key Lab of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - W Li
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M Yi
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Z-K Liu
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M Hashimoto
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Y Zhang
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - D-H Lu
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - T P Devereaux
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - L-L Wang
- State Key Lab of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - X-C Ma
- State Key Lab of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - Q-M Zhang
- Department of Physics, Renmin University of China, Beijing 100872, China
| | - Q-K Xue
- State Key Lab of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - D-H Lee
- Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA and Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Z-X Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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40
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van Wyk P, Smyth D, Blake J, Elliott J, McClean D, Puri A, Yi M. Long-term outcomes of multivessel intervention versus culprit vessel intervention in ST-segment-elevation myocardial infarction: The Christchurch experience. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.397] [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: 11/26/2022]
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41
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Hu XH, Nie Q, Yi M, Li TT, Wang ZF, Huang ZX, Gong XD, Zhou L, Ji WK, Hu WF, Liu JF, Wang L, Woodward Z, Zhu J, Liu WB, Nguyen Q, Li DC. The Tumor Suppressor, p53 Regulates the γA-Crystallin Gene During Mouse Lens Development. Curr Mol Med 2014; 14:1197-204. [DOI: 10.2174/1566524014666141021144927] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 06/12/2014] [Accepted: 06/28/2014] [Indexed: 11/22/2022]
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42
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McLachlan CYL, Yi M, Ling A, Jardine DL. Adverse drug events are a major cause of acute medical admission. Intern Med J 2014; 44:633-8. [DOI: 10.1111/imj.12455] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Accepted: 04/08/2014] [Indexed: 11/30/2022]
Affiliation(s)
| | - M. Yi
- Biostatistics Department; Canterbury District Health Board; Christchurch New Zealand
| | - A. Ling
- Medical Corner Doctors; Rangiora New Zealand
| | - D. L. Jardine
- Department of General Medicine; Christchurch Hospital; Christchurch New Zealand
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43
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Yi M, Zhang Y, Liu ZK, Ding X, Chu JH, Kemper A, Plonka N, Moritz B, Hashimoto M, Mo SK, Hussain Z, Devereaux T, Fisher I, Wen H, Shen ZX, Lu D. Dynamic competition between spin-density wave order and superconductivity in underdoped Ba1−xKxFe2As2. Nat Commun 2014; 5:3711. [DOI: 10.1038/ncomms4711] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 03/24/2014] [Indexed: 11/09/2022] Open
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44
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Liu WB, Hu XH, Zhang XW, Deng MX, Nie L, Hui SS, Duan W, Tao M, Zhang C, Liu J, Hu WF, Huang ZX, Li L, Yi M, Li TT, Wang L, Liu Y, Liu SJ, Li DWC. Protein serine/threonine Phosphotase-2A is differentially expressed and regulates eye development in vertebrates. Curr Mol Med 2014; 13:1376-84. [PMID: 23826917 DOI: 10.2174/15665240113139990061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Revised: 06/18/2013] [Accepted: 06/27/2013] [Indexed: 11/22/2022]
Abstract
Protein serine/threonine phosphatase-2A (PP-2A) is one of the key enzymes responsible for dephosphorylation in vertebrates. PP-2A-mediated dephosphorylation participates in many different biological processes including cell proliferation, differentiation, transformation, apoptosis, autophage and senescence. However, whether PP-2A directly controls animal development remains to be explored. Here, we present direct evidence to show that PP-2A displays important functions in regulating eye development of vertebrates. Using goldfish as a model system, we have demonstrated the following novel information. First, inhibition of PP-2A activity leads to significant death of the treated embryos, which is derived from blastomere apoptosis associated with enhanced phosphorylation of Bcl-XL at Ser-62, and the survived embryos displayed severe phenotype in the eye. Second, knockdown of PP-2A with morpholino oligomers leads to significant death of the injected embryos. The survived embryos from PP-2A knockdown displayed clear retardation in lens differentiation. Finally, overexpression of each catalytic subunit of PP-2A also causes death of majority of the injected embryos and leads to absence of goldfish eye lens or severely disturbed differentiation. Together, our results provide direct evidence that protein phosphatase-2A is important for normal eye development in goldfish.
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Affiliation(s)
- W-B Liu
- Key Laboratory of Protein Chemistry and Development Biology of National Education Department, College of Life Science, Hunan Normal University, Changsha, China
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45
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Ji WK, Tang XC, Yi M, Chen PQ, Liu FY, Hu XH, Hu WF, Fu SJ, Liu JF, Wu KL, Wu MX, Liu XL, Luo LX, Huang S, Liu ZZ, Yu MB, Liu YZ, Li DWC. p53 directly regulates αA- and βA3/A1-crystallin genes to modulate lens differentiation. Curr Mol Med 2014; 13:968-78. [PMID: 23745585 DOI: 10.2174/15665240113139990052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 04/29/2013] [Accepted: 05/31/2013] [Indexed: 11/22/2022]
Abstract
It is well established that the tumor suppressor p53 plays major roles in regulating apoptosis and cell cycle progression. In addition, recent studies have demonstrated that p53 is actively involved in regulating cell differentiation in muscle, the circulatory system and various carcinoma tissues. We have recently shown that p53 also controls lens differentiation. Regarding the mechanism, we reveal that p53 directly regulates c-Maf and Prox1, two important transcription factors to control cell differentiation in the ocular lens. In the present study, we present further evidence to show that p53 can regulate lens differentiation by controlling expression of the differentiation genes coding for the lens crystallins. First, the αA and βA3/A1 gene promoters or introns all contain putative p53 binding sites. Second, gel mobility shifting assays revealed that the p53 protein in nuclear extracts from lens epithelial cells directly binds to the p53 binding sites found in these crystallin gene promoters or introns. Third, exogenous wild type p53 induces dose-dependent expression of the luciferase reporter gene driven by different crystallin gene promoters and the exogenous dominant negative mutant p53 causes dose-dependent inhibition of the same crystallin genes. Fourth, ChIP assays revealed that p53 binds to crystallin gene promoters in vivo. Finally, in the p53 knockout mouse lenses, expression levels of various crystallins were found down-regulated in comparison with those from the wild type mouse lenses. Together, our results reveal that p53 directly regulates expression of different sets of genes to control lens differentiation.
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Affiliation(s)
- W-K Ji
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, 54 Xianlie Road, Guangzhou, China
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46
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Li L, Wang L, Li TT, Li X, Huang XQ, Chen XW, Li ZL, Lv XM, Liu FY, Luo ZW, Liu M, Hu XH, Hu WF, Huang ZX, Yi M, Liu SJ, Liu YZ, Li DWC. ERK signaling pathway regulates embryonic survival and eye development in goldfish, Carassius auratus. Curr Mol Med 2014; 13:959-67. [PMID: 23745584 DOI: 10.2174/1566524011313090067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 04/28/2013] [Accepted: 05/31/2013] [Indexed: 11/22/2022]
Abstract
The extracellular signal-regulated kinase (ERK) is one of the three major types of mitogen-activated protein kinases. Previous studies showed that ERKs mediate various signaling pathways for cell proliferation, differentiation, survival and transformation in mammals. In the present study, we use goldfish as a model system and demonstrate that ERK kinases play important roles in promoting embryonic survival and regulate development of eye and trunk in vertebrates. ERKs are highly expressed in multiple tissues including lens epithelial cells, lens fiber cells, retina, brain, muscle and heart of adult goldfish. Injection of the dominant negative ERK mutant (DNM-ERK) into the fertilized eggs of goldfish significantly inhibited ERK activity at blastula stage, and completely blocked ERK activity at gastrula and later stages. As a result, the blastula cells were induced into apoptosis, and majority of the injected embryos were lethal at embryonic stages. At the molecular level, inhibition of ERK activity by DNM-ERKs suppressed phosphorylation of Bad at Ser-112 to promote apoptosis. Similar results were observed when MEK activity was inhibited by U0126 treatment. The survived embryos display significant abnormality in the phenotypes of both eye and trunk. Associated with the abnormality in the eye development, phosphorylation in Pax-6 and expression of HSF4 were significantly decreased and expression of the β-crystallin gene was also downregulated. These results provide novel information regarding the roles of ERKs in regulating vertebrate development.
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Affiliation(s)
- L Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, 54 Xianlie Road, Guangzhou, China.
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47
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Yi M, Huo L, Koenig KB, Mittendorf EA, Meric-Bernstam F, Kuerer HM, Bedrosian I, Buzdar AU, Symmans WF, Crow JR, Bender M, Shah RR, Hortobagyi GN, Hunt KK. Which threshold for ER positivity? a retrospective study based on 9639 patients. Ann Oncol 2014; 25:1004-11. [PMID: 24562447 DOI: 10.1093/annonc/mdu053] [Citation(s) in RCA: 151] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Guidelines for the use of chemotherapy and endocrine therapy recently recommended that estrogen receptor (ER) status be considered positive if ≥1% of tumor cells demonstrate positive nuclear staining by immunohistochemistry. In clinical practice, a range of thresholds are used; a common one is 10% positivity. Data addressing the optimal threshold with regard to the efficacy of endocrine therapy are lacking. In this study, we compared patient, tumor, treatment and survival differences among breast cancer patients using ER-positivity thresholds of 1% and 10%. METHODS The study population consisted of patients with primary breast carcinoma treated at our center from January 1990 to December 2011 and whose records included complete data on ER status. Patients were separated into three groups: ≥10% positive staining for ER (ER-positive ≥10%), 1%-9% positive staining for ER (ER-positive 1%-9%) and <1% positive staining (ER-negative). RESULTS Of 9639 patients included, 80.5% had tumors that were ER-positive ≥10%, 2.6% had tumors that were ER-positive 1%-9% and 16.9% had tumors that were ER-negative. Patients with ER-positive 1%-9% tumors were younger with more advanced disease compared with patients with ER-positive ≥10% tumors. At a median follow-up of 5.1 years, patients with ER-positive 1%-9% tumors had worse survival rates than did patients with ER-positive ≥10% tumors, with and without adjustment for clinical stage and grade. Survival rates did not differ significantly between patients with ER-positive 1%-9% and ER-negative tumors. CONCLUSIONS Patients with tumors that are ER-positive 1%-9% have clinical and pathologic characteristics different from those with tumors that are ER-positive ≥10%. Similar to patients with ER-negative tumors, those with ER-positive 1%-9% disease do not appear to benefit from endocrine therapy; further study of its clinical benefit in this group is warranted. Also, there is a need to better define which patients of this group belong to basal or luminal subtypes.
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Affiliation(s)
- M Yi
- Department of Surgical Oncology
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48
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Kim T, Yi M, Joo S, Jeong J, Han J, Hong S. Cases of chronic insomnia patients treated by group cognitive behavioral therapy for insomnia. Sleep Med 2013. [DOI: 10.1016/j.sleep.2013.11.400] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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49
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Yi M, Yan G, Xuan Y, Dai Z, Li S, Wu R. Study on euronal metabolic characterization in peritumoral area of C6 rat glioma using 1h MRS at 7T. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.2168] [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: 11/26/2022]
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50
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de Jong S, Kukreja R, Trabant C, Pontius N, Chang CF, Kachel T, Beye M, Sorgenfrei F, Back CH, Bräuer B, Schlotter WF, Turner JJ, Krupin O, Doehler M, Zhu D, Hossain MA, Scherz AO, Fausti D, Novelli F, Esposito M, Lee WS, Chuang YD, Lu DH, Moore RG, Yi M, Trigo M, Kirchmann P, Pathey L, Golden MS, Buchholz M, Metcalf P, Parmigiani F, Wurth W, Föhlisch A, Schüßler-Langeheine C, Dürr HA. Speed limit of the insulator-metal transition in magnetite. Nat Mater 2013; 12:882-6. [PMID: 23892787 DOI: 10.1038/nmat3718] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 06/24/2013] [Indexed: 05/19/2023]
Abstract
As the oldest known magnetic material, magnetite (Fe3O4) has fascinated mankind for millennia. As the first oxide in which a relationship between electrical conductivity and fluctuating/localized electronic order was shown, magnetite represents a model system for understanding correlated oxides in general. Nevertheless, the exact mechanism of the insulator-metal, or Verwey, transition has long remained inaccessible. Recently, three-Fe-site lattice distortions called trimerons were identified as the characteristic building blocks of the low-temperature insulating electronically ordered phase. Here we investigate the Verwey transition with pump-probe X-ray diffraction and optical reflectivity techniques, and show how trimerons become mobile across the insulator-metal transition. We find this to be a two-step process. After an initial 300 fs destruction of individual trimerons, phase separation occurs on a 1.5±0.2 ps timescale to yield residual insulating and metallic regions. This work establishes the speed limit for switching in future oxide electronics.
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Affiliation(s)
- S de Jong
- 1] Stanford Institute for Energy and Materials Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA [2]
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