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Qu H, Shi X, Xu Y, Qin H, Li J, Cai S, Zhao J, Wan B, Yang Y, Li B. Mechanism of Musashi2 affecting radiosensitivity of lung cancer by modulating DNA damage repair. MedComm (Beijing) 2024; 5:e548. [PMID: 38645664 PMCID: PMC11032739 DOI: 10.1002/mco2.548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/23/2024] Open
Abstract
Identifying new targets for overcoming radioresistance is crucial for improving the efficacy of lung cancer radiotherapy, given that tumor cell resistance is a leading cause of treatment failure. Recent research has spotlighted the significance of Musashi2 (MSI2) in cancer biology. In this study, we first demonstrated that MSI2 plays a key function in regulating the radiosensitivity of lung cancer. The expression of MSI2 is negatively correlated with overall survival in cancer patients, and the knockdown of MSI2 inhibits tumorigenesis and increases radiosensitivity of lung cancer cells. Cellular radiosensitivity, which is closely linked to DNA damage, is influenced by MSI2 interaction with ataxia telangiectasia mutated and Rad3-related kinase (ATR) and checkpoint kinase 1 (CHK1) post-irradiation; moreover, knockdown of MSI2 inhibits the ATR-mediated DNA damage response pathway. RNA-binding motif protein 17 (RBM17), which is implicated in DNA damage repair, exhibits increased interaction with MSI2 post-irradiation. We found that knockdown of RBM17 disrupted the interaction between MSI2 and ATR post-irradiation and increased the radiosensitivity of lung cancer cells. Furthermore, we revealed the potential mechanism of MSI2 recruitment into the nucleus with the assistance of RBM17 to activate ATR to promote radioresistance. This study provides novel insights into the potential application of MSI2 as a new target in lung cancer radiotherapy.
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Affiliation(s)
- Hongjin Qu
- Department of Radiation MedicineFaculty of Naval MedicineNaval Medical UniversityShanghaiChina
- Key Laboratory of Systems Biomedicine (Ministry of Education)Shanghai Center for Systems BiomedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Xiong Shi
- Shanghai Engineering Research Center of Tooth Restoration and RegenerationTongji Research Institute of StomatologyDepartment of Radiology, Stomatological Hospital and Dental School, Tongji UniversityShanghaiChina
| | - Ying Xu
- Department of Radiation MedicineFaculty of Naval MedicineNaval Medical UniversityShanghaiChina
| | - Hongran Qin
- Department of Nuclear RadiationShanghai Pulmonary HospitalSchool of MedicineTongji UniversityShanghaiChina
| | - Junshi Li
- Department of Radiation MedicineFaculty of Naval MedicineNaval Medical UniversityShanghaiChina
| | - Shanlin Cai
- Department of Radiation MedicineFaculty of Naval MedicineNaval Medical UniversityShanghaiChina
| | - Jianpeng Zhao
- Department of Radiation MedicineFaculty of Naval MedicineNaval Medical UniversityShanghaiChina
| | - Bingbing Wan
- Key Laboratory of Systems Biomedicine (Ministry of Education)Shanghai Center for Systems BiomedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Yanyong Yang
- Department of Radiation MedicineFaculty of Naval MedicineNaval Medical UniversityShanghaiChina
| | - Bailong Li
- Department of Radiation MedicineFaculty of Naval MedicineNaval Medical UniversityShanghaiChina
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Cui X, Shang X, Xie J, Xie C, Tang Z, Luo Q, Wu C, Wang G, Wang N, He K, Wang L, Huang L, Wan B, Roeder RG, Han ZG. Cooperation between IRTKS and deubiquitinase OTUD4 enhances the SETDB1-mediated H3K9 trimethylation that promotes tumor metastasis via suppressing E-cadherin expression. Cancer Lett 2023; 575:216404. [PMID: 37739210 DOI: 10.1016/j.canlet.2023.216404] [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: 07/09/2023] [Revised: 08/31/2023] [Accepted: 09/18/2023] [Indexed: 09/24/2023]
Abstract
Elevated expression and genetic aberration of IRTKS, also named as BAIAP2L1, have been observed in many tumors, especially in tumor progression. however, the molecular and cellular mechanisms involved in the IRTKS-enhanced tumor progression are obscure. Here we show that higher IRTKS level specifically increases histone H3 lysine 9 trimethylation (H3K9me3) by promoting accumulation of the histone methyltransferase SETDB1. Furthermore, we reveal that IRTKS recruits the deubiquitinase OTUD4 to remove Lys48-linked polyubiquitination at K182/K1050 sites of SETDB1, thus blocking SETDB1 degradation via the ubiquitin-proteasome pathway. Interestingly, the enhanced IRTKS-OTUD4-SETDB1-H3K9me3 axis leads to a general decrease in chromatin accessibility, which inhibits transcription of CDH1 encoding E-cadherin, a key molecule essential for maintaining epithelial cell phenotype, and therefore results in epithelial-mesenchymal transition (EMT) and malignant cell metastasis. Clinically, the elevated IRTKS levels in tumor specimens correlate with SETDB1 levels, but negatively associate with survival time. Our data reveal a novel mechanism for the IRTKS-enhanced tumor progression, where IRTKS cooperates with OTUD4 to enhance SETDB1-mediated H3K9 trimethylation that promotes tumor metastasis via suppressing E-cadherin expression. This study also provides a potential approach to reduce the activity and stability of the known therapeutic target SETDB1 possibly through regulating IRTKS or deubiquitinase OTUD4.
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Affiliation(s)
- Xiaofang Cui
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xueying Shang
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jia Xie
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chenyi Xie
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Zhanyun Tang
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, 10065, USA
| | - Qing Luo
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chongchao Wu
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Guangxing Wang
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Na Wang
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Kunyan He
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Lan Wang
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Liyu Huang
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Bingbing Wan
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, 10065, USA
| | - Ze-Guang Han
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China.
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Xie FH, Wu GH, Zhao X, Wan B, Yao R, Meng M, Liang L, Chen Q, Tang SJ. [Progress on health-related quality of life and its influencing factors in patients with tuberculosis sequelae]. Zhonghua Jie He He Hu Xi Za Zhi 2023; 46:614-618. [PMID: 37278179 DOI: 10.3760/cma.j.cn112147-20221117-00904] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
With the emergence of new tuberculosis patients, the number of patients with tuberculosis sequelae is increasing, which not only increases the medical burden of tuberculosis sequelae year by year, but also affects the health-related quality of life (HRQOL) of patients. The HRQOL of patients with tuberculosis sequelae has gradually received attention, but there are few relevant studies. Studies have shown that HRQOL is related to various factors such as post-tuberculosis lung disease, adverse reaction to anti-tuberculosis drugs, decreased physical activity, psychological barriers, low economic status and marital status. This article reviewed the current situation of HRQOL in patients with sequelae of tuberculosis and its influencing factors, in order to provide a reference for improving the quality of life of patients with sequelae of tuberculosis.
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Affiliation(s)
- F H Xie
- The 2nd Tuberculosis Ward of Chengdu Public Health Clinical Medical Center, Chengdu 610061, China
| | - G H Wu
- The 2nd Tuberculosis Ward of Chengdu Public Health Clinical Medical Center, Chengdu 610061, China
| | - X Zhao
- Nursing Department of Chengdu Public Health Clinical Medical Center, Chengdu 610061, China
| | - B Wan
- Nursing Department of Chengdu Public Health Clinical Medical Center, Chengdu 610061, China
| | - R Yao
- The 2nd Tuberculosis Ward of Chengdu Public Health Clinical Medical Center, Chengdu 610061, China
| | - M Meng
- Nursing Department of the Eighth Medical Center of PLA General Hospital, Beijing 100091, China
| | - L Liang
- The 2nd Tuberculosis Ward of Chengdu Public Health Clinical Medical Center, Chengdu 610061, China
| | - Q Chen
- The 2nd Tuberculosis Ward of Chengdu Public Health Clinical Medical Center, Chengdu 610061, China
| | - S J Tang
- Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing 101149, China
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Liu L, Zhu M, Wang Y, Wan B, Jiang Z. [Molecular pathological mechanism of liver metabolic disorder in mice with severe spinal muscular atrophy]. Nan Fang Yi Ke Da Xue Xue Bao 2023; 43:852-858. [PMID: 37313828 DOI: 10.12122/j.issn.1673-4254.2023.05.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To explore the molecular pathological mechanism of liver metabolic disorder in severe spinal muscular atrophy (SMA). METHODS The transgenic mice with type Ⅰ SMA (Smn-/- SMN20tg/2tg) and littermate control mice (Smn+/- SMN20tg/2tg) were observed for milk suckling behavior and body weight changes after birth. The mice with type Ⅰ SMA mice were given an intraperitoneal injection of 20% glucose solution or saline (15 μL/12 h), and their survival time was recorded. GO enrichment analysis was performed using the RNA-Seq data of the liver of type Ⅰ SMA and littermate control mice, and the results were verified using quantitative real-time PCR. Bisulfite sequencing was performed to examine CpG island methylation level in Fasn gene promoter region in the liver of the neonatal mice. RESULTS The neonatal mice with type Ⅰ SMA showed normal milk suckling behavior but had lower body weight than the littermate control mice on the second day after birth. Intraperitoneal injection of glucose solution every 12 h significantly improved the median survival time of type Ⅰ SMA mice from 9±1.3 to 11± 1.5 days (P < 0.05). Analysis of the RNA-Seq data of the liver showed that the expression of the target genes of PPARα related to lipid metabolism and mitochondrial β oxidation were down-regulated in the liver of type Ⅰ SMA mice. Type Ⅰ SMA mice had higher methylation level of the Fasn promoter region in the liver than the littermate control mice (76.44% vs 58.67%). In primary cultures of hepatocytes from type Ⅰ SMA mice, treatment with 5-AzaC significantly up-regulated the expressions of the genes related to lipid metabolism by over 1 fold (P < 0.01). CONCLUSION Type Ⅰ SMA mice have liver metabolic disorder, and the down-regulation of the target genes of PPARα related to lipid and glucose metabolism due to persistent DNA methylation contributes to the progression of SMA.
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Affiliation(s)
- L Liu
- Suzhou Medical College of Soochow University, Suzhou 215000, China
| | - M Zhu
- Suzhou Medical College of Soochow University, Suzhou 215000, China
| | - Y Wang
- Suzhou Medical College of Soochow University, Suzhou 215000, China
| | - B Wan
- Suzhou Medical College of Soochow University, Suzhou 215000, China
| | - Z Jiang
- Suzhou Medical College of Soochow University, Suzhou 215000, China
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Guo X, Li Y, Wan B, Lv Y, Wang X, Liu G, Wang P. ETV1 inhibition depressed M2 polarization of tumor-associated macrophage and cell process in gastrointestinal stromal tumor via down-regulating PDE3A. J Clin Biochem Nutr 2023; 72:139-146. [PMID: 36936869 PMCID: PMC10017324 DOI: 10.3164/jcbn.22-47] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 07/13/2022] [Indexed: 01/15/2023] Open
Abstract
M2-type polarization of tumor associated-macrophage (TAM) is involved in the malignancy of gastrointestinal stromal tumor (GIST) progression. ETS variant 1 (ETV1) has been previously validated to regulate GIST pathogenesis. Our study intended to explore the role and mechanism of ETV1 in mediating the M2-polarization of TAM in GIST progression. First, we analyzed the correlation between ETV1 expression and M2-polarization in GIST tissues. IL-4 was used to treat THP-1-derived TAM cells and IL-4-stimulated TAM were co-cultured with GIST-T1 cells to mimic the GIST microenvironment. A loss-of-function assay was performed to explore the role of ETV1. Results showed that ETV1 elevation was positively correlated with M2-polarization. IL-4-induced TAM promoted ETV1 expression, silencing ETV1 inhibited proliferation, invasion and KIT activation in IL-4-treated GIST cells, while cell apoptosis was enhanced. Besides, co-culture of ETV1-silenced GIST cells significantly depressed M2-polarization in TAM, presented as decreased levels of CD206, Agr-1 and cytokines, as well as the proportion of CD206-positive TAM. PDE3A was positively correlated with ETV1 and M2-polarization. Overexpressing PDE3A reversed the inhibitory effects of ETV1 silencing. Generally, ETV1 inhibition depressed M2-polarization of TAM in GIST and its promotion on pathological aggravation via down-regulating PDE3A. This evidence may provide a new target for GIST regulation.
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Affiliation(s)
- Xueyan Guo
- Department of Gastroenterology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi 710068, China
| | - Yulong Li
- Department of Gastroenterology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi 710068, China
| | - Bingbing Wan
- Department of Gastroenterology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi 710068, China
| | - Yifei Lv
- Department of Gastroenterology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi 710068, China
| | - Xue Wang
- Department of Gastroenterology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi 710068, China
| | - Guisheng Liu
- Department of Gastroenterology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi 710068, China
| | - Ping Wang
- Department of Gastroenterology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi 710068, China
- To whom correspondence should be addressed. E-mail:
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Wan B, Wei LJ, Tan TM, Qin L, Wang H. Inhibitory effect and mechanism of Lactobacillus crispatus on cervical precancerous cells Ect1/E6E7 and screening of early warning factors. Infect Agent Cancer 2023; 18:5. [PMID: 36726132 PMCID: PMC9890743 DOI: 10.1186/s13027-023-00483-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 01/26/2023] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVE To study the potential mechanism of Lactobacillus crispatus inhibiting cervical squamous intraepithelial lesion (SIL) and screen the early warning factors of SIL. METHODS The effects of Lactobacillus crispatus on the proliferation, apoptosis, cross pore migration and invasion and cytokines of cervical precancerous cells Ect1/E6E7 were detected respectively. The effect of Lactobacillus crispatus on the expression of differential proteins screened in Ect1/E6E7 cells were detected by Western blot. RESULTS Lactobacillus crispatus significantly inhibited the proliferation, induced apoptosis and inhibited cell migration of Ect1/E6E7 cells in a time-dependent manner (P < 0.05), but had no significant effect on cell invasion. Lactobacillus crispatus significantly promoted the secretion of Th1 cytokines and inhibited the secretion of Th2 cytokines by Ect1/E6E7 cells (P < 0.05). In addition, compared with SiHa cells in the control group, the expression of differential proteins PCNA, ATM, LIG1 and HMGB1 in Ect1/E6E7cells decreased significantly, while the expression of TDG and OGG1 proteins increased significantly (P < 0.05). ABCG2 protein in Ect1/E6E7 cells was slightly higher than that in SiHa cells, but the difference was not statistically significant. What is interesting is that Lactobacillus crispatus significantly inhibited the expression of ABCG2, PCNA, ATM, LIG1, OGG1 and HMGB1 proteins in Ect1/E6E7 cells, and promoted the expression of TDG protein. CONCLUSIONS Lactobacillus crispatus may inhibit the function of Ect1/E6E7 cells through multiple pathways and exert the potential to reverse the progression of SIL.
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Affiliation(s)
- B. Wan
- grid.256607.00000 0004 1798 2653Gynecologic Tumor Department, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Zhong Shan Street, Nanning, 530021 Guangxi Zhuang Autonomous Region China
| | - L. J. Wei
- grid.256607.00000 0004 1798 2653Gynecologic Tumor Department, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Zhong Shan Street, Nanning, 530021 Guangxi Zhuang Autonomous Region China
| | - T. M. Tan
- grid.256607.00000 0004 1798 2653Gynecologic Tumor Department, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Zhong Shan Street, Nanning, 530021 Guangxi Zhuang Autonomous Region China
| | - L. Qin
- grid.256607.00000 0004 1798 2653Gynecologic Tumor Department, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Zhong Shan Street, Nanning, 530021 Guangxi Zhuang Autonomous Region China
| | - H. Wang
- grid.256607.00000 0004 1798 2653Gynecologic Tumor Department, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Zhong Shan Street, Nanning, 530021 Guangxi Zhuang Autonomous Region China
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Zhu C, Liang X, Chen X, Liang M, Zheng J, Wan B, Luo S. Characterizing the Specific Recognition of Xanthurenic Acid by GEP1 and GEP1-GCα Interactions in cGMP Signaling Pathway in Gametogenesis of Malaria Parasites. Int J Mol Sci 2023; 24:ijms24032561. [PMID: 36768882 PMCID: PMC9916804 DOI: 10.3390/ijms24032561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 01/20/2023] [Accepted: 01/26/2023] [Indexed: 01/31/2023] Open
Abstract
Gametogenesis is an essential step for malaria parasite transmission and is activated in mosquito by signals including temperature drop, pH change, and mosquito-derived xanthurenic acid (XA). Recently, a membrane protein gametogenesis essential protein 1 (GEP1) was found to be responsible for sensing these signals and interacting with a giant guanylate cyclase α (GCα) to activate the cGMP-PKG-Ca2+ signaling pathway for malaria parasite gametogenesis. However, the molecular mechanisms for this process remain unclear. In this study, we used AlphaFold2 to predict the structure of GEP1 and found that it consists of a conserved N-terminal helical domain and a transmembrane domain that adopts a structure similar to that of cationic amino acid transporters. Molecular docking results showed that XA binds to GEP1 via a pocket similar to the ligand binding sites of known amino acid transporters. In addition, truncations of this N-terminal sequence significantly enhanced the expression, solubility, and stability of GEP1. In addition, we found that GEP1 interacts with GCα via its C-terminal region, which is interrupted by mutations of a few conserved residues. These findings provide further insights into the molecular mechanism for the XA recognition by GEP1 and the activation of the gametogenesis of malaria parasites through GEP1-GCα interaction.
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Affiliation(s)
- Cheng Zhu
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Xiaoge Liang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Xu Chen
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Miaomiao Liang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Jianting Zheng
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Bingbing Wan
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
- Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Shukun Luo
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
- Correspondence:
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Guo X, Li Y, Wan B, Lv Y, Wang X, Liu G, Wang P. KAT7 promoted gastric cancer progression through promoting YAP1 activation. Pathol Res Pract 2022; 237:154020. [PMID: 35868058 DOI: 10.1016/j.prp.2022.154020] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 07/05/2022] [Accepted: 07/12/2022] [Indexed: 11/29/2022]
Abstract
Lysine acetyltransferase 7 (KAT7) was upregulated in gastric cancer (GC) patient tissues, and associated with poor prognosis and metastasis. However, its specific role in GC remains unclear. This study aimed to annotate the role of KAT7 in GC cells. The results showed that the overexpression of KAT7 promoted cell growth, migration, and invasion, while KAT7 inhibition has the opposite effect. Besides, KAT7 participated in cell cycle phase distribution and epithelial-mesenchymal transition (EMT) process of GC cells. In addition, KAT7 promoted the transcription and nuclear translocation of Yes-associated protein 1 (YAP1) in MKN45 cells. Silence of YAP1 partly reversed the promoting effect of KAT7 on GC cells progression. In summary, this study indicates that KAT7 promoted GC cells progression through promoting YAP1 activation, contributes to understand the specific role of KAT7 in GC.
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Affiliation(s)
- Xueyan Guo
- Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi province 710068, China
| | - Yulong Li
- Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi province 710068, China
| | - Bingbing Wan
- Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi province 710068, China
| | - Yifei Lv
- Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi province 710068, China
| | - Xue Wang
- Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi province 710068, China
| | - Guisheng Liu
- Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi province 710068, China
| | - Ping Wang
- Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi province 710068, China.
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Feng X, Huan F, Chen H, Lu F, Li Z, Li H, Li W, Wei G, Wan B, Zhang Y, Jing H, Wang S. PO-1874 Evaluating the use of SGRT in supraclavicular fossa positioning of mastectomy patients. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03837-3] [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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Liu F, Chen W, Wan B, Chen H, Ling Z, Chen Z, Fu Z. Recovery of high-grade copper from metal-rich particles of waste printed circuit boards by ball milling and sieving. Environ Technol 2022; 43:514-523. [PMID: 32660381 DOI: 10.1080/09593330.2020.1795932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 07/04/2020] [Indexed: 06/11/2023]
Abstract
In this paper, a method of ball milling and sieving is proposed for recovery of high-grade copper from waste printed circuit boards (WPCBs). The effects of the milling time on the metals grade and recovery of the Cu, Sn and Pb during mechanical treatment were investigated. The results showed that, after 3 cycles of ball milling and sieving, the content of Cu was enriched to 94.72 wt.% from the initial 74.22 wt.% with a high recovery rate of 86.78%. Moreover, the contents of Sn and Pb were enriched to 28.27 wt.% and 18.86 wt.% from 10.13 wt.% and 6.63 wt.% in the by-products, respectively. However, excessive grinding occurred when the milling time was longer than 3 h and led to a sharp decrease in Cu recovery. The X-ray diffraction (XRD) patterns indicated that the metal phases mainly comprised pure Cu, Sn, Pb in the WPCB particles, while a Cu-Sn alloy was formed during the milling process, and the Cu-Sn alloy was also enriched in the tailings. The results presented here establish that ball milling and sieving is an alternative approach to recovering high-grade copper from WPCBs.
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Affiliation(s)
- Fangfang Liu
- Guangdong Key laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, People's Republic of China
- Department of Electromechanical Engineering, Guangdong University of Science and Technology, Dongguan, People's Republic of China
| | - Weiping Chen
- Guangdong Key laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, People's Republic of China
| | - Bingbing Wan
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, People's Republic of China
| | - Huanda Chen
- Guangdong Key laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, People's Republic of China
| | - Zicheng Ling
- Guangdong Key laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, People's Republic of China
| | - Zhiping Chen
- Guangdong Key laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, People's Republic of China
| | - Zhiqiang Fu
- Guangdong Key laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, People's Republic of China
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Chen M, Li X, Wan B, Zhu S, Chen C, Zhang F, Song Y, Lv T. P36.08 Effect of Soluble CD39 and PD-L1 Levels on Diagnosis and Prognosis of Lung Cancer Patients with Malignant Pleural Effusion. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.1639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Li S, Bonner JN, Wan B, So S, Summers A, Gonzalez L, Xue X, Zhao X. Esc2 orchestrates substrate-specific sumoylation by acting as a SUMO E2 cofactor in genome maintenance. Genes Dev 2021; 35:261-272. [PMID: 33446573 PMCID: PMC7849368 DOI: 10.1101/gad.344739.120] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 12/10/2020] [Indexed: 12/12/2022]
Abstract
In this study, Li et al. set out to investigate the conserved genome stability factor Esc2 in budding yeast and its roles in DNA damage-induced sumoylation. Using in vitro and in vivo approaches, the authors propose that Esc2 acts as a SUMO E2 cofactor at distinct DNA structures to promote the sumoylation of specific substrates and genome maintenance. SUMO modification regulates diverse cellular processes by targeting hundreds of proteins. However, the limited number of sumoylation enzymes raises the question of how such a large number of substrates are efficiently modified. Specifically, how genome maintenance factors are dynamically sumoylated at DNA replication and repair sites to modulate their functions is poorly understood. Here, we demonstrate a role for the conserved yeast Esc2 protein in this process by acting as a SUMO E2 cofactor. Esc2 is required for genome stability and binds to Holliday junctions and replication fork structures. Our targeted screen found that Esc2 promotes the sumoylation of a Holliday junction dissolution complex and specific replisome proteins. Esc2 does not elicit these effects via stable interactions with substrates or their common SUMO E3. Rather, we show that a SUMO-like domain of Esc2 stimulates sumoylation by exploiting a noncovalent SUMO binding site on the E2 enzyme. This role of Esc2 in sumoylation is required for Holliday junction clearance and genome stability. Our findings thus suggest that Esc2 acts as a SUMO E2 cofactor at distinct DNA structures to promote the sumoylation of specific substrates and genome maintenance.
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Affiliation(s)
- Shibai Li
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Jacob N Bonner
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA.,Program in Biochemistry, Cell, and Molecular Biology, Weill Cornell Graduate School of Medical Sciences, New York, New York 10065, USA
| | - Bingbing Wan
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Stephen So
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas 78666, USA
| | - Ashley Summers
- Materials Science, Engineering, and Commercialization Program, Texas State University, San Marcos, Texas 78666, USA
| | - Leticia Gonzalez
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas 78666, USA
| | - Xiaoyu Xue
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas 78666, USA.,Materials Science, Engineering, and Commercialization Program, Texas State University, San Marcos, Texas 78666, USA
| | - Xiaolan Zhao
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA.,Program in Biochemistry, Cell, and Molecular Biology, Weill Cornell Graduate School of Medical Sciences, New York, New York 10065, USA
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13
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Wan B, Ganier C, Du-Harpur X, Harun N, Watt FM, Patalay R, Lynch MD. Applications and future directions for optical coherence tomography in dermatology. Br J Dermatol 2020; 184:1014-1022. [PMID: 32974943 DOI: 10.1111/bjd.19553] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2020] [Indexed: 12/24/2022]
Abstract
Optical coherence tomography (OCT) is a noninvasive optical imaging method that can generate high-resolution en face and cross-sectional images of the skin in vivo to a maximum depth of 2 mm. While OCT holds considerable potential for noninvasive diagnosis and disease monitoring, it is poorly understood by many dermatologists. Here we aim to equip the practising dermatologist with an understanding of the principles of skin OCT and the potential clinical indications. We begin with an introduction to the technology and discuss the different modalities of OCT including angiographic (dynamic) OCT, which can image cutaneous blood vessels at high resolution. Next we review clinical applications. OCT has been most extensively investigated in the diagnosis of keratinocyte carcinomas, particularly basal cell carcinoma. To date, OCT has not proven sufficiently accurate for the robust diagnosis of malignant melanoma; however, the evaluation of abnormal vasculature with angiographic OCT is an area of active investigation. OCT, and in particular angiographic OCT, also shows promise in monitoring the response to therapy of inflammatory dermatoses, such as psoriasis and connective tissues disease. We additionally discuss a potential role for artificial intelligence in improving the accuracy of interpretation of OCT imaging data.
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Affiliation(s)
- B Wan
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London, UK
| | - C Ganier
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London, UK
| | - X Du-Harpur
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London, UK.,The Francis Crick Institute, 1 Midland Road, London, UK
| | - N Harun
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London, UK
| | - F M Watt
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London, UK
| | - R Patalay
- St John's Institute of Dermatology, King's College London, London, UK
| | - M D Lynch
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London, UK.,St John's Institute of Dermatology, King's College London, London, UK
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14
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Yuan L, Wan B, Bao YZ. [Association between ocular dominance and refraction in myopic subjects]. Zhonghua Yan Ke Za Zhi 2020; 56:693-698. [PMID: 32907303 DOI: 10.3760/cma.j.cn112142-20200206-00050] [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] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Objective: To determine the association between ocular dominance and myopic-astigmatic characteristics in myopic subjects. Methods: Cross-sectional study. A total of 1 503 myopic subjects visiting from the myopiac clinic from December 2011 to December 2012 were included. The spheres and cylinders were recorded. The ocular dominance was determined by the hole-in-the-card test. The average spherical equivalent (SE) and the cylinder between the dominant eyes and the non-dominant eyes were compared with the paired t test. The associations between ocular dominance laterality and refractive characters were analyzed with the crosstab Chi-square test. Results: There were 527 males and 976 females in this study. The median (min, max) of age was 24 (17, 49) years old. Among the subjects, 66.00% (992/1 503) of subjects were right-eye dominant, while 34.00% (511/1 503) of subjects were left-eye dominant. The dominant eyes had significantly lower average sphere powers [(-5.01±1.91) D vs. (-5.10±1.99) D] and lower average cylinder powers [(-0.70±0.68) D vs. (-0.76±0.73) D] than the non-dominant eyes (t=2.976, 4.319; both P<0.01). In the subgroups of |ΔSE|≤0.50 D, 0.50 D<|ΔSE|≤1.00 D, 1.00 D<|ΔSE|≤2.00 D and |ΔSE|>2.00 D, respectively, the dominant eyes were lower myopic in 49.37% (355/719), 51.10% (163/319), 58.48% (100/171) and 65.56% (59/90) of the subjects. The inter-group difference was statistically significant (χ²=11.588, P=0.009). In the subgroups of |ΔCyl|≤0.25 D, 0.25 D<|ΔCyl|≤0.50 D and |ΔCyl|>0.50 D, the dominant eyes had lower astigmatism in 53.94% (89/165), 65.66% (65/99) and 69.70% (46/66) of the subjects, respectively. The inter-group difference was statistically significant (χ²=6.414, P=0.040). Conclusion: The ocular dominance laterality is significantly associated with lower myopia and lower astigmatism in the myopic subjects. (Chin J Ophthalmol, 2020, 56: 693-698).
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Affiliation(s)
- L Yuan
- Department of Ophthalmology, Peking University People's Hospital, Eye Diseases and Optometry Institute, Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases, College of Optometry, Peking University Health Science Center, Beijing 100044, ChinaWan Bo was a graduate student and is now working at the Department of Ophthalmology, Beijing Luhe Hospital, Capital University of Medical Sciences, Beijing 101149, China
| | - B Wan
- Department of Ophthalmology, Peking University People's Hospital, Eye Diseases and Optometry Institute, Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases, College of Optometry, Peking University Health Science Center, Beijing 100044, ChinaWan Bo was a graduate student and is now working at the Department of Ophthalmology, Beijing Luhe Hospital, Capital University of Medical Sciences, Beijing 101149, China
| | - Y Z Bao
- Department of Ophthalmology, Peking University People's Hospital, Eye Diseases and Optometry Institute, Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases, College of Optometry, Peking University Health Science Center, Beijing 100044, ChinaWan Bo was a graduate student and is now working at the Department of Ophthalmology, Beijing Luhe Hospital, Capital University of Medical Sciences, Beijing 101149, China
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15
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Wan B, Li W, Sun W, Liu F, Chen B, Xu S, Chen W, Yi A. Synthesis of Cryolite (Na 3AlF 6) from Secondary Aluminum Dross Generated in the Aluminum Recycling Process. Materials (Basel) 2020; 13:E3871. [PMID: 32887240 PMCID: PMC7503661 DOI: 10.3390/ma13173871] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 08/25/2020] [Accepted: 08/27/2020] [Indexed: 11/17/2022]
Abstract
Secondary aluminum dross (SAD) is regarded as a solid waste of aluminum recycling process that creates serious environmental and health concerns. However, SAD can also be used as a good source of aluminum, so that utilizing the SAD for the production of valuable products is a promising approach of recycling such waste. In the present work, a novel eco-friendly three-step process was proposed for the synthesis of cryolite (Na3AlF6) from the SAD, and it consisted of (1) water-washing pretreatment of SAD, (2) extraction of Al component via pyro-hydrometallurgy, including low-temperature alkaline smelting, water leaching and purification of leachate in sequence, (3) precipitation of cryolite from the purified NaAlO2 solution using the carbonation method. By analysis of the parameter optimization for each procedure, it was found that the maximum hydrolysis efficiency of aluminum nitride (AlN) in the SAD was around 68.3% accompanied with an extraction efficiency of Al reaching 91.5%. On this basis, the cryolite of high quality was synthesized under the following optimal carbonation conditions: reaction temperature of 75 °C, NaAlO2 concentration of 0.11 mol/L, F/(6Al) molar ratio of 1.10, and 99.99% CO2 gas pressure, and flow rate of 0.2 MPa and 0.5 L/min respectively. The formation of Na3AlF6 phase can be detected by XRD. The morphological feature observed by SEM revealed that the as-synthesized cryolite had a polyhedral shape (~1 μm size) with obvious agglomeration. The chemical composition and ignition loss of the as-synthesized cryolite complied well with the requirements of the Chinese national standard (GB/T 4291-2017).
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Affiliation(s)
- Bingbing Wan
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523000, China; (B.W.); (W.S.); (B.C.); (A.Y.)
- School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
- Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou 510640, China;
| | - Wenfang Li
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523000, China; (B.W.); (W.S.); (B.C.); (A.Y.)
| | - Wanting Sun
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523000, China; (B.W.); (W.S.); (B.C.); (A.Y.)
- School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - Fangfang Liu
- Department of Electromechanical Engineering, Guangdong University of Science and Technology, Dongguan 523083, China;
| | - Bin Chen
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523000, China; (B.W.); (W.S.); (B.C.); (A.Y.)
| | - Shiyao Xu
- Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou 510640, China;
| | - Weiping Chen
- Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou 510640, China;
| | - Aihua Yi
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523000, China; (B.W.); (W.S.); (B.C.); (A.Y.)
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16
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Kaur J, Nagy L, Wan B, Saleh H, Schulze A, Raiman J, Inbar-Feigenberg M. The utility of dried blood spot monitoring of branched-chain amino acids for maple syrup urine disease: A retrospective chart review study. Clin Chim Acta 2020; 500:195-201. [DOI: 10.1016/j.cca.2019.10.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 10/15/2019] [Accepted: 10/17/2019] [Indexed: 01/06/2023]
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17
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Liu F, Wan B, Wang F, Chen W. Effect of thermal shock process on the microstructure and peel resistance of single-sided copper clad laminates used in waste printed circuit boards. J Air Waste Manag Assoc 2019; 69:1490-1502. [PMID: 31566485 DOI: 10.1080/10962247.2019.1674751] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 08/21/2019] [Accepted: 09/13/2019] [Indexed: 06/10/2023]
Abstract
Efficient pre-processing is essential to the mechanical recovery of waste printed circuit boards (WPCBs). In this work, a thermal shock pretreatment was utilized to damage the interface between metals and nonmetals of single-sided copper clad laminates (SSCCLs), which are usually employed as the base material of printed circuit boards (PCBs). The effects of three thermal shock treatment parameters-i.e., peak temperature, holding time, and thermal shock cycle times-on the adhesion strength of SSCCLs were evaluated by orthogonal experiments. Microstructures and peel resistance of SSCCLs before and after thermal shock were characterized by scanning electron microscopy (SEM) and 90° peel test, respectively. Our results showed that the impact of three major factors that influence liberation efficiency was in the sequence of peak temperature > shock cycle times > holding time. Furthermore, the optimal thermal shock level could be achieved when the peak temperature was 300°C with the soaking time of 30 min and three cycle times. In the meantime, the corresponding peel strength of the SSCCLs (0.065 N/mm) was sharply decreased by 94% in comparison with those without thermal shock treatment. The manual dismantling experimental data verified the good feasibility of the optimal thermal shock process, suggesting that the copper foil could be readily dismantled from the substrate by hand after pretreatment, with a successful separation rate of 100% and a peeling efficiency of ~ 30 seconds per piece. Therefore, the optimal thermal shock process could notably improve liberation of metals and nonmetals, which would be helpful for efficient recycling of WPCBs.Implications: The interface between copper foil and laminate dielectric in a PCB can be weakened significantly via efficient thermal shock method. Thus, a good liberation could be achieved after thermal shock. In this work, a manual peeling of copper foil from the SSCCL substrates was achieved efficiently after optimal thermal shock pretreatment, confirming the feasibility of a shorter process of metal recovery from scrap SSCCLs without pulverization. The results will be useful for the pretreatment of recovery of the WPCBs.
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Affiliation(s)
- Fangfang Liu
- Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, Guangdong, People's Republic of China
- Department of Electromechanical Engineering, Guangdong University of Science and Technology, Dongguan, Guangdong, People's Republic of China
| | - Bingbing Wan
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, Guangdong, People's Republic of China
| | - Fazhan Wang
- Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, Guangdong, People's Republic of China
| | - Weiping Chen
- Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, Guangdong, People's Republic of China
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18
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Wan B, Xu C, Wang W, Zhang X, Zhang Q, Zhuang W, Zhu Y, Huang Z, Chen G, Fang M, Lv T, Song Y. EP1.03-19 The Frequency and Prognosis of MDM2 Mutations in East Asian Non-Small-Cell Lung Cancer Patients. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Wan B, Wu J, Meng X, Lei M, Zhao X. Molecular Basis for Control of Diverse Genome Stability Factors by the Multi-BRCT Scaffold Rtt107. Mol Cell 2019; 75:238-251.e5. [PMID: 31348879 DOI: 10.1016/j.molcel.2019.05.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 03/20/2019] [Revised: 04/11/2019] [Accepted: 05/30/2019] [Indexed: 01/08/2023]
Abstract
BRCT domains support myriad protein-protein interactions involved in genome maintenance. Although di-BRCT recognition of phospho-proteins is well known to support the genotoxic response, whether multi-BRCT domains can acquire distinct structures and functions is unclear. Here we present the tetra-BRCT structures from the conserved yeast protein Rtt107 in free and ligand-bound forms. The four BRCT repeats fold into a tetrahedral structure that recognizes unmodified ligands using a bi-partite mechanism, suggesting repeat origami enabling function acquisition. Functional studies show that Rtt107 binding of partner proteins of diverse activities promotes genome replication and stability in both distinct and concerted manners. A unified theme is that tetra- and di-BRCT domains of Rtt107 collaborate to recruit partner proteins to chromatin. Our work thus illustrates how a master regulator uses two types of BRCT domains to recognize distinct genome factors and direct them to chromatin for constitutive genome protection.
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Affiliation(s)
- Bingbing Wan
- Molecular Biology Department, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Jian Wu
- Shanghai Institute of Precision Medicine, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200125, China
| | - Xiangzhou Meng
- Molecular Biology Department, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Ming Lei
- Shanghai Institute of Precision Medicine, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200125, China; Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200125, China; National Facility for Protein Science in Shanghai, Zhangjiang Lab, Shanghai 201210, China; Shanghai Science Research Center, Chinese Academy of Sciences, Shanghai 201204, China.
| | - Xiaolan Zhao
- Molecular Biology Department, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
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20
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Chen L, Jia J, Zang Y, Li J, Wan B. MicroRNA-101 regulates autophagy, proliferation and apoptosis via targeting EZH2 in laryngeal squamous cell carcinoma. Neoplasma 2019; 66:507-515. [PMID: 30868890 DOI: 10.4149/neo_2018_180811n611] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 12/19/2018] [Indexed: 11/08/2022]
Abstract
Laryngeal carcinoma is the second commonest head and neck carcinoma globally. MicroRNA-101 (miR-101) has been reported as a tumor suppressor in multiple malignancies including laryngeal squamous cell carcinoma (LSCC). However, the roles and molecular mechanisms of miR-101 in the development of LSCC have not been fully elucidated. In present study, RT-qPCR assay was performed to detect the expression of miR-101 and enhancer of zeste homolog 2 (EZH2) mRNA. Western blot assay was conducted to determine protein expression of LC3-Ⅰ, LC3-Ⅱ, p62 and EZH2. Cell proliferative capacity was evaluated by MTS assay. The effect of miR-101 alone or along with EZH2 on cell apoptosis was assessed by apoptotic index and caspase-3 activity. Bioinformatic analysis, luciferase assay and RNA immunoprecipitation (RIP) assay were carried out to investigate the interaction between miR-101 and EZH2. Results revealed that miR-101 expression was strikingly down-regulated in LSCC cell lines. Functional analyses showed that ectopic expression of miR-101 suppressed cell autophagy and proliferation and facilitated cell apoptosis in LSCC. Further investigations revealed that miR-101 inhibited EZH2 expression by direct interaction and EZH2 was highly expressed in LSCC cells. Also, EZH2 knockdown reduced the autophagic activity of LSCC cells. Moreover, restoration experiments showed that EZH2 up-regulation weakened miR-101-mediated anti-autophagy, anti-proliferation and pro-apoptosis effects in LSCC cells. In conclusion, our findings suggested that miR-101 inhibited autophagy and proliferation and promoted apoptosis via targeting EZH2 in LSCC, providing a deep insight into the pathogenesis of LSCC and hinting the pivotal roles of epigenetic modifications especially histone methylation in the development of LSCC.
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Affiliation(s)
- L Chen
- Department of Otolaryngology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, China
| | - J Jia
- Department of Otolaryngology, People's Hospital of Xixian, People's Hospital of Zhengzhou University, Xinyang, China
| | - Y Zang
- Department of Otolaryngology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, China
| | - J Li
- Department of Otolaryngology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, China
| | - B Wan
- Department of Otolaryngology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, China
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21
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Shultis D, Mitra P, Huang X, Johnson J, Khattak NA, Gray F, Piper C, Czajka J, Hansen L, Wan B, Chinnaswamy K, Liu L, Wang M, Pan J, Stuckey J, Cierpicki T, Borchers CH, Wang S, Lei M, Zhang Y. Changing the Apoptosis Pathway through Evolutionary Protein Design. J Mol Biol 2019; 431:825-841. [PMID: 30625288 DOI: 10.1016/j.jmb.2018.12.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 09/12/2018] [Revised: 12/12/2018] [Accepted: 12/28/2018] [Indexed: 11/30/2022]
Abstract
One obstacle in de novo protein design is the vast sequence space that needs to be searched through to obtain functional proteins. We developed a new method using structural profiles created from evolutionarily related proteins to constrain the simulation search process, with functions specified by atomic-level ligand-protein binding interactions. The approach was applied to redesigning the BIR3 domain of the X-linked inhibitor of apoptosis protein (XIAP), whose primary function is to suppress the cell death by inhibiting caspase-9 activity; however, the function of the wild-type XIAP can be eliminated by the binding of Smac peptides. Isothermal calorimetry and luminescence assay reveal that the designed XIAP domains can bind strongly with the Smac peptides but do not significantly inhibit the caspase-9 proteolytic activity in vitro compared with the wild-type XIAP protein. Detailed mutation assay experiments suggest that the binding specificity in the designs is essentially determined by the interplay of structural profile and physical interactions, which demonstrates the potential to modify apoptosis pathways through computational design.
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Affiliation(s)
- David Shultis
- Department of Computational Medicine and Bioinformatics, University of Michigan, 100 Washtenaw Avenue, Ann Arbor, MI 48109, USA
| | - Pralay Mitra
- Department of Computational Medicine and Bioinformatics, University of Michigan, 100 Washtenaw Avenue, Ann Arbor, MI 48109, USA
| | - Xiaoqiang Huang
- Department of Computational Medicine and Bioinformatics, University of Michigan, 100 Washtenaw Avenue, Ann Arbor, MI 48109, USA
| | - Jarrett Johnson
- Department of Computational Medicine and Bioinformatics, University of Michigan, 100 Washtenaw Avenue, Ann Arbor, MI 48109, USA
| | - Naureen Aslam Khattak
- Department of Computational Medicine and Bioinformatics, University of Michigan, 100 Washtenaw Avenue, Ann Arbor, MI 48109, USA
| | - Felicia Gray
- Department of Pathology, University of Michigan, 1150 W. Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Clint Piper
- Department of Computational Medicine and Bioinformatics, University of Michigan, 100 Washtenaw Avenue, Ann Arbor, MI 48109, USA
| | - Jeff Czajka
- Department of Computational Medicine and Bioinformatics, University of Michigan, 100 Washtenaw Avenue, Ann Arbor, MI 48109, USA
| | - Logan Hansen
- Department of Computational Medicine and Bioinformatics, University of Michigan, 100 Washtenaw Avenue, Ann Arbor, MI 48109, USA
| | - Bingbing Wan
- Department of Biological Chemistry, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, MI 48109, USA
| | | | - Liu Liu
- Department of Internal Medicine, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Mi Wang
- Department of Internal Medicine, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Jingxi Pan
- Department of Biochemistry & Microbiology, The University of Victoria-Genome BC Proteomics Centre, Victoria, BC, Canada V8Z 7X8
| | - Jeanne Stuckey
- Life Sciences Institute, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109, USA
| | - Tomasz Cierpicki
- Department of Pathology, University of Michigan, 1150 W. Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Christoph H Borchers
- Department of Biochemistry & Microbiology, The University of Victoria-Genome BC Proteomics Centre, Victoria, BC, Canada V8Z 7X8
| | - Shaomeng Wang
- Department of Internal Medicine, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Ming Lei
- Department of Biological Chemistry, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Yang Zhang
- Department of Computational Medicine and Bioinformatics, University of Michigan, 100 Washtenaw Avenue, Ann Arbor, MI 48109, USA; Department of Biological Chemistry, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, MI 48109, USA.
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22
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Zhang J, Huang J, Chang JF, Wu CR, Heidbrink WW, Salewski M, Madsen B, Zhu YB, von Hellermann MG, Gao W, Xu Z, Wan B. Fast ion D-alpha measurements using a bandpass-filtered system on EAST. Rev Sci Instrum 2018; 89:10D121. [PMID: 30399922 DOI: 10.1063/1.5038828] [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: 05/06/2018] [Accepted: 06/15/2018] [Indexed: 06/08/2023]
Abstract
Based on the charge exchange reaction between fast ions and a neutral beam, fast ion features can be inferred from the spectrum of Doppler-shifted Balmer-alpha light from energetic hydrogenic atoms. In order to study the interaction between instabilities and fast-ion transport, recently we extended the fast ion D-alpha (FIDA) measurements by using a combination of a bandpass filter and a photomultiplier tube (PMT) (f-FIDA). A bandpass filter selects the desired spectral band from 651 nm to 654 nm before detection by the PMT. Preliminary data from the EAST tokamak show that the active signals have been detected from reneutralized beam ions along the vertical and tangential viewing geometries. The details will be presented in this paper to primarily address the specifications and performance of f-FIDA hardware components and preliminary FIDA measurements.
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Affiliation(s)
- J Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - J Huang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - J F Chang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - C R Wu
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - W W Heidbrink
- Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
| | - M Salewski
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - B Madsen
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Y B Zhu
- Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
| | | | - W Gao
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - Z Xu
- Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, People's Republic of China
| | - B Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
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Liao Y, Liu X, Wan B, Zhang H, Cai P. The effects of high-voltage electric field on microbial communities in paddy soil. N Biotechnol 2018. [DOI: 10.1016/j.nbt.2018.05.946] [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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Abstract
OBJECTIVE P3H4, as a kind of quinone compounds, is a coenzyme Q10 (ubiquinone) analogues. A recent study investigated the role of P3H4 on cerebral ischemia-reperfusion and hypertension. It is well known that ischemia-reperfusion is closely associated with kidney disease. This study aims to investigate the impact of P3H4 in the occurrence and development of the tumor. MATERIALS AND METHODS A total of 40 rats at 8-week old were selected to establish renal cancer model by burying suture method for 4 months. The rats in the experimental group received P3H4 treatment at 100 mg/kg every 48 h for consecutive 4 weeks, while the rats in control received normal saline. H&E staining was applied to test the histological changes of tissue at 0, 1, 2 weeks after treatment. Gene microarray was adopted to screen miRNA expression to explore the function of miRNA in renal cancer cell line. Renal cancer cell migration and invasion were evaluated by wound healing and transwell assays after the treatment of P3H4, miR-1a, miR-133a, respectively. RESULTS The rats were randomly equally divided into experimental group and control. HE staining result showed renal interstitial fibroblasts hyperplasia, renal tubular necrosis, and glomerular reduction after modeling. P3H4 treatment significantly alleviated the lesion severity and inhibited the tumor cells invasion. Microarray demonstrated that miR-1a and miR-133a were significantly upregulated in rat renal cancer tissue after the treatment of P3H4. The overexpression of miR-1a and miR-133a markedly reduced renal cell invasion and migration, which was consistent with the effect of P3H4. CONCLUSIONS P3H4 suppressed the development of renal carcinoma through upregulating miR-1a and miR-13a, which provides fundamental leads for the future anti-cancer therapy.
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Affiliation(s)
- B Wan
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China.
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Liu Y, Wan B, Lin S. Letter: significant burden of nonalcoholic fatty liver disease with advanced fibrosis in the USA: a cross-sectional analysis of 2011-2014 National Health and Nutrition Examination Survey. Aliment Pharmacol Ther 2018; 48:584-585. [PMID: 30156322 DOI: 10.1111/apt.14850] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Y Liu
- Liver Research Center, the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China.,The First Clinical Medical Collage of Fujian Medical University, Fuzhou, Fujian, China
| | - B Wan
- Institute of Neurology, University College London, London, UK
| | - S Lin
- Liver Research Center, the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
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Deranian RD, Ferron JR, Humphreys DA, Johnson RD, Leuer JA, Penaflor BG, Walker ML, Welander AS, Wan B, Gribov Y, Kwon M, Jhang H, Khayrutdinov RR. Integrated Plasma Control in Next-Generation Devices Using DIII-D Modeling and Simulation Approaches. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a779] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- R. D. Deranian
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - J. R. Ferron
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - D. A. Humphreys
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - R. D. Johnson
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - J. A. Leuer
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - B. G. Penaflor
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - M. L. Walker
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - A. S. Welander
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - B. Wan
- Academia Sinica, IPP, P.O. Box 1126, Hefei 230031, Anhui Province China
| | - Y. Gribov
- ITER Naka, 801-1 Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken, 31-0193
| | - M. Kwon
- Korea Basic Sciences Institute, Daejeon, Republic of Korea
| | - H. Jhang
- Korea Basic Sciences Institute, Daejeon, Republic of Korea
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Huang J, Heidbrink WW, von Hellermann MG, Stagner L, Wu CR, Hou YM, Chang JF, Ding SY, Chen YJ, Zhu YB, Jin Z, Xu Z, Gao W, Wang JF, Lyu B, Zang Q, Zhong GQ, Hu L, Wan B. Validation of fast-ion D-alpha spectrum measurements during EAST neutral-beam heated plasmas. Rev Sci Instrum 2016; 87:11E542. [PMID: 27910390 DOI: 10.1063/1.4960308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
To investigate the fast ion behavior, a fast ion D-alpha (FIDA) diagnostic system has been installed on EAST. Fast ion features can be inferred from the Doppler shifted spectrum of Balmer-alpha light from energetic hydrogenic atoms. This paper will focus on the validation of FIDA measurements performed using MHD-quiescent discharges in 2015 campaign. Two codes have been applied to calculate the Dα spectrum: one is a Monte Carlo code, Fortran 90 version FIDASIM, and the other is an analytical code, Simulation of Spectra (SOS). The predicted SOS fast-ion spectrum agrees well with the measurement; however, the level of fast-ion part from FIDASIM is lower. The discrepancy is possibly due to the difference between FIDASIM and SOS velocity distribution function. The details will be presented in the paper to primarily address comparisons of predicted and observed spectrum shapes/amplitudes.
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Affiliation(s)
- J Huang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - W W Heidbrink
- University of California, Irvine, California 92697, USA
| | - M G von Hellermann
- Diagnostic Team, ITER Organization, Route de Vinon-sur-Verdon 13067 St. Paul Lez Durance, France
| | - L Stagner
- University of California, Irvine, California 92697, USA
| | - C R Wu
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - Y M Hou
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - J F Chang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - S Y Ding
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - Y J Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - Y B Zhu
- University of California, Irvine, California 92697, USA
| | - Z Jin
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - Z Xu
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - W Gao
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - J F Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - Q Zang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - G Q Zhong
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - L Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
| | - B Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China
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Wang X, Wang P, Li J, Yuan K, Yin G, Wan B, Lang J. Image Guided Radiation Therapy Boost in Combination With High-Dose-Rate Intracavitary Brachytherapy for the Treatment of Cervical Cancer. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1393] [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: 11/30/2022]
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Sun Y, Liang Y, Liu YQ, Gu S, Yang X, Guo W, Shi T, Jia M, Wang L, Lyu B, Zhou C, Liu A, Zang Q, Liu H, Chu N, Wang HH, Zhang T, Qian J, Xu L, He K, Chen D, Shen B, Gong X, Ji X, Wang S, Qi M, Song Y, Yuan Q, Sheng Z, Gao G, Fu P, Wan B. Nonlinear Transition from Mitigation to Suppression of the Edge Localized Mode with Resonant Magnetic Perturbations in the EAST Tokamak. Phys Rev Lett 2016; 117:115001. [PMID: 27661697 DOI: 10.1103/physrevlett.117.115001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Indexed: 06/06/2023]
Abstract
Evidence of a nonlinear transition from mitigation to suppression of the edge localized mode (ELM) by using resonant magnetic perturbations (RMPs) in the EAST tokamak is presented. This is the first demonstration of ELM suppression with RMPs in slowly rotating plasmas with dominant radio-frequency wave heating. Changes of edge magnetic topology after the transition are indicated by a gradual phase shift in the plasma response field from a linear magneto hydro dynamics modeling result to a vacuum one and a sudden increase of three-dimensional particle flux to the divertor. The transition threshold depends on the spectrum of RMPs and plasma rotation as well as perturbation amplitude. This means that edge topological changes resulting from nonlinear plasma response plays a key role in the suppression of ELM with RMPs.
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Affiliation(s)
- Y Sun
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - Y Liang
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
- Institute for Energy and Climate Research-Plasma Physics, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Y Q Liu
- CCFE Culham Science Centre, Abingdon, OX14 3DB, United Kingdom
| | - S Gu
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - X Yang
- School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, China
| | - W Guo
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - T Shi
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - M Jia
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - L Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - C Zhou
- Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
| | - A Liu
- Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
| | - Q Zang
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - H Liu
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - N Chu
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - H H Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - T Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - J Qian
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - L Xu
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - K He
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - D Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - B Shen
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - X Gong
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - X Ji
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - S Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - M Qi
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - Y Song
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - Q Yuan
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - Z Sheng
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - G Gao
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - P Fu
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
| | - B Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
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Liu M, Hou HM, Li X, Zhang YQ, Wan B, Wang JY, Jin B. [Value of prostate volume, PSAD and F/T in the detection of prostate cancer in males with PSA 4-10 μg/L]. Zhonghua Zhong Liu Za Zhi 2016; 38:526-9. [PMID: 27531267 DOI: 10.3760/cma.j.issn.0253-3766.2016.07.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To evaluate the association of prostate volume, PSAD and F/T with prostate cancer detection rate in males with a total PSA of 4-10 μg/L. METHODS Clinical data of 196 patients who underwent prostate biopsy from November 2006 to September 2010 and with a PSA of 4-10 μg/L were retrospectively analyzed. The association of detection rate of prostate cancer with prostate volume, prostate specific antigen density PSAD) and free PSA/total PSA ratio (F/T) was analyzed by Spearman coefficient, receiver operating characteristic curve and logistic regression analysis. RESULTS The prostate volume, PSAD and F/T had a significant association with detection rate of prostate cancer (P<0.05 for all). The odd ratio was 0.96, 1.91 and 0.02, respectively. The area under curve (AUR) was 0.31, 0.66 and 0.63, respectively. The cancer detection rate was decreased along with the increase of prostate volume. When PSAD 0.15 ng·ml(-1)·ml(-1) was used as the cut-off value, the sensitivity, specificity, positive prediction rate and negative prediction rate was 72.3%, 51.1%, 42.3% and 21.2%, respectively. When the patients were divided by prostate volume into <19.9, 20-39.9, 40-59.9, 60-79.9 and >80 ml subgroups, the cancer detection rate of each subgroup was 50.0%, 45.6%, 30.8%, 15.4% and 5.6%, respectively. CONCLUSION In patients with a total PSA of 4-10 μg/L, the prostate cancer detection rate has a significant association with prostate volume, PSAD and F/T.
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Affiliation(s)
- M Liu
- Department of Urology, Beijing Hospital of the Ministry of Health, Beijing 100000, China
| | - H M Hou
- Department of Urology, Beijing Hospital of the Ministry of Health, Beijing 100000, China
| | - X Li
- Department of Urology, Beijing Hospital of the Ministry of Health, Beijing 100000, China
| | - Y Q Zhang
- Department of Urology, Beijing Hospital of the Ministry of Health, Beijing 100000, China
| | - B Wan
- Department of Urology, Beijing Hospital of the Ministry of Health, Beijing 100000, China
| | - J Y Wang
- Department of Urology, Beijing Hospital of the Ministry of Health, Beijing 100000, China
| | - B Jin
- Department of Urology, Beijing Hospital of the Ministry of Health, Beijing 100000, China
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Abstract
Genome maintenance requires coordinated actions of diverse DNA metabolism processes. Scaffolding proteins, such as those containing multiple BRCT domains, can influence these processes by collaborating with numerous partners. The best-studied examples of multi-BRCT scaffolds are the budding yeast Dpb11 and its homologues in other organisms, which regulate DNA replication, repair, and damage checkpoints. Recent studies have shed light on another group of multi-BRCT scaffolds, including Rtt107 in budding yeast and related proteins in other organisms. These proteins also influence several DNA metabolism pathways, though they use strategies unlike those employed by the Dpb11 family of proteins. Yet, at the same time, these 2 classes of multi-BRCT proteins can collaborate under specific situations. This review summarizes recent advances in our understanding of how these multi-BRCT proteins function in distinct manners and how they collaborate, with a focus on Dpb11 and Rtt107.
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Affiliation(s)
- Bingbing Wan
- a Molecular Biology Program, Memorial Sloan Kettering Cancer Center , New York , NY , USA
| | - Lisa E Hang
- a Molecular Biology Program, Memorial Sloan Kettering Cancer Center , New York , NY , USA
| | - Xiaolan Zhao
- a Molecular Biology Program, Memorial Sloan Kettering Cancer Center , New York , NY , USA
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Bonner JN, Choi K, Xue X, Torres NP, Szakal B, Wei L, Wan B, Arter M, Matos J, Sung P, Brown GW, Branzei D, Zhao X. Smc5/6 Mediated Sumoylation of the Sgs1-Top3-Rmi1 Complex Promotes Removal of Recombination Intermediates. Cell Rep 2016; 16:368-378. [PMID: 27373152 PMCID: PMC5051638 DOI: 10.1016/j.celrep.2016.06.015] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [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: 02/29/2016] [Revised: 05/12/2016] [Accepted: 05/31/2016] [Indexed: 01/23/2023] Open
Abstract
Timely removal of DNA recombination intermediates is critical for genome stability. The DNA helicase-topoisomerase complex, Sgs1-Top3-Rmi1 (STR), is the major pathway for processing these intermediates to generate conservative products. However, the mechanisms that promote STR-mediated functions remain to be defined. Here we show that Sgs1 binds to poly-SUMO chains and associates with the Smc5/6 SUMO E3 complex in yeast. Moreover, these interactions contribute to the sumoylation of Sgs1, Top3, and Rmi1 upon the generation of recombination structures. We show that reduced STR sumoylation leads to accumulation of recombination structures, and impaired growth in conditions when these structures arise frequently, highlighting the importance of STR sumoylation. Mechanistically, sumoylation promotes STR inter-subunit interactions and accumulation at DNA repair centers. These findings expand the roles of sumoylation and Smc5/6 in genome maintenance by demonstrating that they foster STR functions in the removal of recombination intermediates.
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Affiliation(s)
- Jacob N Bonner
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Programs in Biochemistry, Cell, and Molecular Biology, Weill Cornell Graduate School of Medical Sciences, New York, NY 10065, USA
| | - Koyi Choi
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Programs in Biochemistry, Cell, and Molecular Biology, Weill Cornell Graduate School of Medical Sciences, New York, NY 10065, USA
| | - Xiaoyu Xue
- Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Nikko P Torres
- Donnelly Centre and Department of Biochemistry, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Barnabas Szakal
- IFOM, The FIRC of Molecular Oncology, Via Adamello 16, 20139, Milan, Italy
| | - Lei Wei
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Gerstner Jr. Graduate School of Biomedical Sciences, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Bingbing Wan
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Meret Arter
- Institute of Biochemistry, Swiss Federal Institute of Technology in Zürich, Otto-Stern-Weg 3, 8093 Zürich, Switzerland
| | - Joao Matos
- Institute of Biochemistry, Swiss Federal Institute of Technology in Zürich, Otto-Stern-Weg 3, 8093 Zürich, Switzerland
| | - Patrick Sung
- Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Grant W Brown
- Donnelly Centre and Department of Biochemistry, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Dana Branzei
- IFOM, The FIRC of Molecular Oncology, Via Adamello 16, 20139, Milan, Italy
| | - Xiaolan Zhao
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Programs in Biochemistry, Cell, and Molecular Biology, Weill Cornell Graduate School of Medical Sciences, New York, NY 10065, USA.
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Yin J, Wan B, Sarkar J, Horvath K, Wu J, Chen Y, Cheng G, Wan K, Chin P, Lei M, Liu Y. Dimerization of SLX4 contributes to functioning of the SLX4-nuclease complex. Nucleic Acids Res 2016; 44:4871-80. [PMID: 27131364 PMCID: PMC4889959 DOI: 10.1093/nar/gkw354] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 02/02/2016] [Accepted: 04/21/2016] [Indexed: 11/16/2022] Open
Abstract
The Fanconi anemia protein SLX4 assembles a genome and telomere maintenance toolkit, consisting of the nucleases SLX1, MUS81 and XPF. Although it is known that SLX4 acts as a scaffold for building this complex, the molecular basis underlying this function of SLX4 remains unclear. Here, we report that functioning of SLX4 is dependent on its dimerization via an oligomerization motif called the BTB domain. We solved the crystal structure of the SLX4BTB dimer, identifying key contacts (F681 and F708) that mediate dimerization. Disruption of BTB dimerization abrogates nuclear foci formation and telomeric localization of not only SLX4 but also of its associated nucleases. Furthermore, dimerization-deficient SLX4 mutants cause defective cellular response to DNA interstrand crosslinking agent and telomere maintenance, underscoring the contribution of BTB domain-mediated dimerization of SLX4 in genome and telomere maintenance.
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Affiliation(s)
- Jinhu Yin
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institutes of Health, 251 Bayview Blvd, Baltimore, MD 21044, USA
| | - Bingbing Wan
- National Center for Protein Science Shanghai, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 333 Haike Road, Shanghai 200031, China Shanghai Research Center, Chinese Academy of Sciences, Shanghai 200031, China
| | - Jaya Sarkar
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institutes of Health, 251 Bayview Blvd, Baltimore, MD 21044, USA
| | - Kent Horvath
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institutes of Health, 251 Bayview Blvd, Baltimore, MD 21044, USA
| | - Jian Wu
- National Center for Protein Science Shanghai, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 333 Haike Road, Shanghai 200031, China
| | - Yong Chen
- National Center for Protein Science Shanghai, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 333 Haike Road, Shanghai 200031, China
| | - Guangjuan Cheng
- Shanghai Research Center, Chinese Academy of Sciences, Shanghai 200031, China
| | - Ke Wan
- Shanghai Research Center, Chinese Academy of Sciences, Shanghai 200031, China
| | - Peiju Chin
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institutes of Health, 251 Bayview Blvd, Baltimore, MD 21044, USA
| | - Ming Lei
- National Center for Protein Science Shanghai, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 333 Haike Road, Shanghai 200031, China Department of Biological Chemistry, University of Michigan Medical School, 1150 W. Medical Center Drive, Ann Arbor, MI 48109, USA Shanghai Research Center, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yie Liu
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institutes of Health, 251 Bayview Blvd, Baltimore, MD 21044, USA
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Wan B, Tan J, Zeng Q, He LY, Gan Y, Dai YB, Yao K. 729G/C polymorphism in Toll-like receptor 4 results in increased susceptibility to bladder cancer. Genet Mol Res 2015; 14:15482-7. [PMID: 26634514 DOI: 10.4238/2015.november.30.26] [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] [Indexed: 11/03/2022]
Abstract
In this study, the association between the 729G/C polymorphism in Toll-like receptor 4 (TLR4) and the risk of bladder cancer was investigated. A total of 376 patients with bladder cancer and 380 healthy volunteers from the Third Xiangya Hospital of Central South University (China) were enrolled in this study between January 2008 and February 2014. The TLR4-729G/C polymorphism was detected by the polymerase chain reaction-restriction fragment length polymorphism assay. There was a significant difference in the distribution of the TLR4-729G/C genotype between bladder cancer patients and healthy controls (P < 0.001). Our analysis showed that the GC genotype (OR = 2.99; 95%CI = 1.01-4.81, P = 0.046) and CC genotype (OR = 3.67; 95%CI = 2.11-7.27, P = 0.017) were significantly associated with increased bladder cancer risk when the GG genotype served as a reference. Furthermore, carriers of the C allele had a significantly increased risk of developing bladder cancer (OR = 3.89; 95%CI = 2.88-8.53; P = 0.009). Our results suggest a correlation between the TLR4-729G/C polymorphism and the risk of developing bladder cancer in this Chinese population.
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Affiliation(s)
- B Wan
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - J Tan
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Q Zeng
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - L Y He
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Y Gan
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Y B Dai
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - K Yao
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
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Lei B, Xing R, Zhou X, Lv D, Wan B, Shu F, Zhong L, Wu H, Mao X. Neutral alpha-1,4-glucosidase and fructose levels contribute to discriminating obstructive and nonobstructive azoospermia in Chinese men with azoospermia. Andrologia 2015; 48:670-5. [PMID: 26610429 DOI: 10.1111/and.12498] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2015] [Indexed: 12/27/2022] Open
Affiliation(s)
- B. Lei
- Department of Urology; Nanfang Hospital; Southern Medical University; Guangzhou Guangdong Province China
- Department of Urology; Peking University Shenzhen Hospital; Shenzhen Guangdong Province China
| | - R. Xing
- Department of Urology; Weihai Hospital; Qingdao University; Qingdao Shandong Province China
| | - X. Zhou
- Department of Urology; Nanfang Hospital; Southern Medical University; Guangzhou Guangdong Province China
| | - D. Lv
- Department of Urology; Nanfang Hospital; Southern Medical University; Guangzhou Guangdong Province China
| | - B. Wan
- Department of Urology; Nanfang Hospital; Southern Medical University; Guangzhou Guangdong Province China
| | - F. Shu
- Department of Urology; Nanfang Hospital; Southern Medical University; Guangzhou Guangdong Province China
| | - L. Zhong
- Department of Urology; Nanfang Hospital; Southern Medical University; Guangzhou Guangdong Province China
| | - H. Wu
- Department of Urology; Nanfang Hospital; Southern Medical University; Guangzhou Guangdong Province China
| | - X. Mao
- Department of Urology; Nanfang Hospital; Southern Medical University; Guangzhou Guangdong Province China
- Department of Urology; Peking University Shenzhen Hospital; Shenzhen Guangdong Province China
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Zhang X, Chen L, Luo P, Ju Y, Zhang H, Ma F, Ge H, Zhang Y, Wan B, Li Y, Xu X, Mao W. TL response of LiF:Mg,Cu,P (GR200A and GR207A) exposed to high-energy 12C ions. RADIAT MEAS 2015. [DOI: 10.1016/j.radmeas.2014.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sarkar J, Wan B, Yin J, Vallabhaneni H, Horvath K, Kulikowicz T, Bohr VA, Zhang Y, Lei M, Liu Y. SLX4 contributes to telomere preservation and regulated processing of telomeric joint molecule intermediates. Nucleic Acids Res 2015; 43:5912-23. [PMID: 25990736 PMCID: PMC4499145 DOI: 10.1093/nar/gkv522] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [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: 01/28/2015] [Accepted: 05/07/2015] [Indexed: 11/14/2022] Open
Abstract
SLX4 assembles a toolkit of endonucleases SLX1, MUS81 and XPF, which is recruited to telomeres via direct interaction of SLX4 with TRF2. Telomeres present an inherent obstacle for DNA replication and repair due to their high propensity to form branched DNA intermediates. Here we provide novel insight into the mechanism and regulation of the SLX4 complex in telomere preservation. SLX4 associates with telomeres throughout the cell cycle, peaking in late S phase and under genotoxic stress. Disruption of SLX4's interaction with TRF2 or SLX1 and SLX1's nuclease activity independently causes telomere fragility, suggesting a requirement of the SLX4 complex for nucleolytic resolution of branched intermediates during telomere replication. Indeed, the SLX1-SLX4 complex processes a variety of telomeric joint molecules in vitro. The nucleolytic activity of SLX1-SLX4 is negatively regulated by telomeric DNA-binding proteins TRF1 and TRF2 and is suppressed by the RecQ helicase BLM in vitro. In vivo, in the presence of functional BLM, telomeric circle formation and telomere sister chromatid exchange, both arising out of nucleolytic processing of telomeric homologous recombination intermediates, are suppressed. We propose that the SLX4-toolkit is a telomere accessory complex that, in conjunction with other telomere maintenance proteins, ensures unhindered, but regulated telomere maintenance.
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Affiliation(s)
- Jaya Sarkar
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institute of Health, 251 Bayview Blvd, Baltimore, MD 21224, USA
| | - Bingbing Wan
- National Center for Protein Science Shanghai, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 333 Haike Road, Shanghai 200031, China Department of Biological Chemistry, University of Michigan Medical School, 1150 W. Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Jinhu Yin
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institute of Health, 251 Bayview Blvd, Baltimore, MD 21224, USA
| | - Haritha Vallabhaneni
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institute of Health, 251 Bayview Blvd, Baltimore, MD 21224, USA
| | - Kent Horvath
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institute of Health, 251 Bayview Blvd, Baltimore, MD 21224, USA
| | - Tomasz Kulikowicz
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institute of Health, 251 Bayview Blvd, Baltimore, MD 21224, USA
| | - Vilhelm A Bohr
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institute of Health, 251 Bayview Blvd, Baltimore, MD 21224, USA
| | - Yanbin Zhang
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Ming Lei
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institute of Health, 251 Bayview Blvd, Baltimore, MD 21224, USA National Center for Protein Science Shanghai, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 333 Haike Road, Shanghai 200031, China
| | - Yie Liu
- Laboratory of Molecular Gerontology, National Institute on Aging/National Institute of Health, 251 Bayview Blvd, Baltimore, MD 21224, USA
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Ji X, Song YT, Shen G, Zhou Z, Cao L, Xu T, Liu X, Peng X, Wang C, Wang S, Zhu N, Zhang P, Wu J, Gong X, Shen B, Gao D, Fu P, Wan B, Li J. Engineering Design of EAST Passive Stabilization Loop. J Fusion Energ 2014. [DOI: 10.1007/s10894-014-9827-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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39
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Huang J, Heidbrink WW, Wan B, von Hellermann MG, Zhu Y, Gao W, Wu C, Li Y, Fu J, Lyu B, Yu Y, Shi Y, Ye M, Hu L, Hu C. Conceptual design of a fast-ion D-alpha diagnostic on experimental advanced superconducting tokamak. Rev Sci Instrum 2014; 85:11E407. [PMID: 25430314 DOI: 10.1063/1.4887820] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
To investigate the fast ion behavior, a fast ion D-alpha (FIDA) diagnostic system has been planned and is presently under development on Experimental Advanced Superconducting Tokamak. The greatest challenges for the design of a FIDA diagnostic are its extremely low intensity levels, which are usually significantly below the continuum radiation level and several orders of magnitude below the bulk-ion thermal charge-exchange feature. Moreover, an overlaying Motional Stark Effect (MSE) feature in exactly the same wavelength range can interfere. The simulation of spectra code is used here to guide the design and evaluate the diagnostic performance. The details for the parameters of design and hardware are presented.
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Affiliation(s)
- J Huang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. 1126, 230031 Hefei, Anhui, China
| | - W W Heidbrink
- Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
| | - B Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. 1126, 230031 Hefei, Anhui, China
| | - M G von Hellermann
- FOM Institute DIFFER, P.O. BOX 1207, Nieuwegein 3430 BE, The Netherlands
| | - Y Zhu
- Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
| | - W Gao
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C Wu
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Y Li
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - J Fu
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - B Lyu
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Y Yu
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Y Shi
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - M Ye
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - L Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. 1126, 230031 Hefei, Anhui, China
| | - C Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. 1126, 230031 Hefei, Anhui, China
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Tong B, Wan B, Wei Z, Wang T, Zhao P, Dou Y, Lv Z, Xia Y, Dai Y. Role of cathepsin B in regulating migration and invasion of fibroblast-like synoviocytes into inflamed tissue from patients with rheumatoid arthritis. Clin Exp Immunol 2014; 177:586-97. [PMID: 24749816 PMCID: PMC4137842 DOI: 10.1111/cei.12357] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [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] [Accepted: 04/14/2014] [Indexed: 12/27/2022] Open
Abstract
Cathepsin B (CB), an important proteinase that participates in joint destruction in rheumatoid arthritis (RA), exhibits higher expression in fibroblast-like synoviocyte (FLS) of abnormal proliferative synovial tissues. Whether and how it affects the biological behaviours of RA-FLS, such as migration and invasion, are poorly understood. In the present study, CB expression in synovial tissues of patients with RA and ostearthritis (OA) were measured by quantitative polymerase chain reaction (qPCR) and immunohistochemistry (IHC), respectively. Stable depletion of endogenous CB was achieved by small interfering RNA (siRNA) transfection, and decrease of CB activity was acquired by using its specific inhibitor (CA074Me). The effects of CA074Me and RNA interference (RNAi) treatments on proliferation, migration, invasion, matrix metalloproteinase (MMP)-2/-9 expression, focal adhesion kinase (FAK) activation, and mitogen-activated protein kinases (MAPKs) phosphorylation of FLS were analysed. In RA synovial tissues, CB was expressed at elevated levels compared with OA synovial tissues. CA074Me could inhibit invasion of FLS obtained from RA patients in an ex-vivo invasion model. CA074Me and siRNA treatments suppressed the migration and invasion of FLS, reduced the activity, expression and mRNA level of MMP-2, restrained the activation of FAK and reduced the expression of F-actin. Moreover, CA074Me decreased the phosphorylation of P38 MAPK and c-Jun N-terminal kinase (JNK) in FLS, while siCB treatment reduced the phosphorylation of P38 but not JNK. CB substantially contributes to the invasive phenotype of FLS that leads to joint destruction in RA. This proteinase may show promise as a therapeutic target in inflammatory arthritis.
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Affiliation(s)
- B Tong
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing, China
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41
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Iyer A, Gao L, Doyle A, Rao P, Jayewardene D, Wan B, Kumarasinghe G, Jabbour A, Hicks M, Jansz PC, Feneley MP, Harvey RP, Graham RM, Dhital KK, Macdonald PS. Increasing the tolerance of DCD hearts to warm ischemia by pharmacological postconditioning. Am J Transplant 2014; 14:1744-52. [PMID: 25040306 DOI: 10.1111/ajt.12782] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 03/10/2014] [Accepted: 03/30/2014] [Indexed: 01/25/2023]
Abstract
Donation after circulatory death (DCD) offers a potential additional source of cardiac allografts. We used a porcine asphyxia model to evaluate viability of DCD hearts subjected to warm ischemic times (WIT) of 20–40 min prior to flushing with Celsior (C) solution. We then assessed potential benefits of supplementing C with erythropoietin, glyceryl trinitrate and zoniporide (Cs), a combination that we have shown previously to activate ischemic postconditioning pathways. Hearts flushed with C/Cs were assessed for functional, biochemical and metabolic recovery on an ex vivo working heart apparatus. Hearts exposed to 20-min WIT showed full recovery of functional and metabolic profiles compared with control hearts (no WIT). Hearts subjected to 30- or 40-min WIT prior to C solution showed partial and no recovery, respectively. Hearts exposed to 30-min WIT and Cs solution displayed complete recovery, while hearts exposed to 40-min WIT and Cs solution demonstrated partial recovery. We conclude that DCD hearts flushed with C solution demonstrate complete recovery up to 20-min WIT after which there is rapid loss of viability. Cs extends the limit of WIT tolerability to 30 min. DCD hearts with ≤30-min WIT may be suitable for transplantation and warrant assessment in a transplant model.
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Sommers JA, Banerjee T, Hinds T, Wan B, Wold MS, Lei M, Brosh RM. Novel function of the Fanconi anemia group J or RECQ1 helicase to disrupt protein-DNA complexes in a replication protein A-stimulated manner. J Biol Chem 2014; 289:19928-41. [PMID: 24895130 DOI: 10.1074/jbc.m113.542456] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [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: 12/23/2022] Open
Abstract
Understanding how cellular machinery deals with chromosomal genome complexity is an important question because protein bound to DNA may affect various cellular processes of nucleic acid metabolism. DNA helicases are at the forefront of such processes, yet there is only limited knowledge how they remodel protein-DNA complexes and how these mechanisms are regulated. We have determined that representative human RecQ and Fe-S cluster DNA helicases are potently blocked by a protein-DNA interaction. The Fanconi anemia group J (FANCJ) helicase partners with the single-stranded DNA-binding protein replication protein A (RPA) to displace BamHI-E111A bound to duplex DNA in a specific manner. Protein displacement was dependent on the ATPase-driven function of the helicase and unique properties of RPA. Further biochemical studies demonstrated that the shelterin proteins TRF1 and TRF2, which preferentially bind the telomeric repeat found at chromosome ends, effectively block FANCJ from unwinding the forked duplex telomeric substrate. RPA, but not the Escherichia coli single-stranded DNA-binding protein or shelterin factor Pot1, stimulated FANCJ ejection of TRF1 from the telomeric DNA substrate. FANCJ was also able to displace TRF2 from the telomeric substrate in an RPA-dependent manner. The stimulation of helicase-catalyzed protein displacement is also observed with the DNA helicase RECQ1, suggesting a conserved functional interaction of RPA-interacting helicases. These findings suggest that partnerships between RPA and interacting human DNA helicases may greatly enhance their ability to dislodge proteins bound to duplex DNA, an activity that is likely to be highly relevant to their biological roles in DNA metabolism.
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Affiliation(s)
- Joshua A Sommers
- From the Laboratory of Molecular Gerontology, Biomedical Research Center, NIA, National Institutes of Health, Baltimore, Maryland 21224
| | - Taraswi Banerjee
- From the Laboratory of Molecular Gerontology, Biomedical Research Center, NIA, National Institutes of Health, Baltimore, Maryland 21224
| | - Twila Hinds
- From the Laboratory of Molecular Gerontology, Biomedical Research Center, NIA, National Institutes of Health, Baltimore, Maryland 21224
| | - Bingbing Wan
- the Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, Michigan 48109, and
| | - Marc S Wold
- the Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242
| | - Ming Lei
- the Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, Michigan 48109, and
| | - Robert M Brosh
- From the Laboratory of Molecular Gerontology, Biomedical Research Center, NIA, National Institutes of Health, Baltimore, Maryland 21224,
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43
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Yang YW, Flynn RA, Chen Y, Qu K, Wan B, Wang KC, Lei M, Chang HY. Essential role of lncRNA binding for WDR5 maintenance of active chromatin and embryonic stem cell pluripotency. eLife 2014; 3:e02046. [PMID: 24521543 PMCID: PMC3921674 DOI: 10.7554/elife.02046] [Citation(s) in RCA: 152] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The WDR5 subunit of the MLL complex enforces active chromatin and can bind RNA; the relationship between these two activities is unclear. Here we identify a RNA binding pocket on WDR5, and discover a WDR5 mutant (F266A) that selectively abrogates RNA binding without affecting MLL complex assembly or catalytic activity. Complementation in ESCs shows that WDR5 F266A mutant is unable to accumulate on chromatin, and is defective in gene activation, maintenance of histone H3 lysine 4 trimethylation, and ESC self renewal. We identify a family of ESC messenger and lncRNAs that interact with wild type WDR5 but not F266A mutant, including several lncRNAs known to be important for ESC gene expression. These results suggest that specific RNAs are integral inputs into the WDR5-MLL complex for maintenance of the active chromatin state and embryonic stem cell fates. DOI: http://dx.doi.org/10.7554/eLife.02046.001.
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Affiliation(s)
- Yul W Yang
- Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, United States
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44
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Pang K, Tang Q, Schiffbauer JD, Yao J, Yuan X, Wan B, Chen L, Ou Z, Xiao S. The nature and origin of nucleus-like intracellular inclusions in Paleoproterozoic eukaryote microfossils. Geobiology 2013; 11:499-510. [PMID: 24033870 DOI: 10.1111/gbi.12053] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Accepted: 07/23/2013] [Indexed: 05/19/2023]
Abstract
The well-known debate on the nature and origin of intracellular inclusions (ICIs) in silicified microfossils from the early Neoproterozoic Bitter Springs Formation has recently been revived by reports of possible fossilized nuclei in phosphatized animal embryo-like fossils from the Ediacaran Doushantuo Formation of South China. The revisitation of this discussion prompted a critical and comprehensive investigation of ICIs in some of the oldest indisputable eukaryote microfossils-the ornamented acritarchs Dictyosphaera delicata and Shuiyousphaeridium macroreticulatum from the Paleoproterozoic Ruyang Group of North China-using a suite of characterization approaches: scanning electron microscopy (SEM), transmission electron microscopy (TEM), and focused ion beam scanning electron microscopy (FIB-SEM). Although the Ruyang acritarchs must have had nuclei when alive, our data suggest that their ICIs represent neither fossilized nuclei nor taphonomically condensed cytoplasm. We instead propose that these ICIs likely represent biologically contracted and consolidated eukaryotic protoplasts (the combination of the nucleus, surrounding cytoplasm, and plasma membrane). As opposed to degradational contraction of prokaryotic cells within a mucoidal sheath-a model proposed to explain the Bitter Springs ICIs-our model implies that protoplast condensation in the Ruyang acritarchs was an in vivo biologically programmed response to adverse conditions in preparation for encystment. While the discovery of bona fide nuclei in Paleoproterozoic acritarchs would be a substantial landmark in our understanding of eukaryote evolution, the various processes (such as degradational and biological condensation of protoplasts) capable of producing nuclei-mimicking structures require that interpretation of ICIs as fossilized nuclei be based on comprehensive investigations.
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Affiliation(s)
- K Pang
- State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing, China; Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
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45
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Wan B, Yin J, Horvath K, Sarkar J, Chen Y, Wu J, Wan K, Lu J, Gu P, Yu EY, Lue NF, Chang S, Liu Y, Lei M. SLX4 assembles a telomere maintenance toolkit by bridging multiple endonucleases with telomeres. Cell Rep 2013; 4:861-9. [PMID: 24012755 PMCID: PMC4334113 DOI: 10.1016/j.celrep.2013.08.017] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [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: 05/19/2013] [Revised: 07/22/2013] [Accepted: 08/16/2013] [Indexed: 12/15/2022] Open
Abstract
SLX4 interacts with several endonucleases to resolve structural barriers in DNA metabolism. SLX4 also interacts with telomeric protein TRF2 in human cells. The molecular mechanism of these interactions at telomeres remains unknown. Here, we report the crystal structure of the TRF2-binding motif of SLX4 (SLX4TBM) in complex with the TRFH domain of TRF2 (TRF2TRFH) and map the interactions of SLX4 with endonucleases SLX1, XPF, and MUS81. TRF2 recognizes a unique HxLxP motif on SLX4 via the peptide-binding site in its TRFH domain. Telomeric localization of SLX4 and associated nucleases depend on the SLX4-endonuclease and SLX4-TRF2 interactions and the protein levels of SLX4 and TRF2. SLX4 assembles an endonuclease toolkit that negatively regulates telomere length via SLX1-catalyzed nucleolytic resolution of telomere DNA structures. We propose that the SLX4-TRF2 complex serves as a double-layer scaffold bridging multiple endonucleases with telomeres for recombination-based telomere maintenance.
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Affiliation(s)
- Bingbing Wan
- State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China; National Center for Protein Science Shanghai, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China; Howard Hughes Medical Institute, University of Michigan Medical School, 1150 W. Medical Center Drive, Ann Arbor, MI 48109, USA; Department of Biological Chemistry, University of Michigan Medical School, 1150 W. Medical Center Drive, Ann Arbor, MI 48109, USA
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46
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Iyer A, Doyle A, Gao L, Kumarasinghe G, Wan B, Jabbour A, Hicks M, Jansz P, Dhital K, Macdonald P. Hearts from Donations After Circulatory Death (DCD) Donors – Assessment on Clinically Approved Ex-vivo Organ Care System. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.03.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Xu J, Zhang Y, Xiao Y, Ma S, Liu Q, Dang S, Jin M, Shi Y, Wan B, Zhang Y. Inhibition of 12/15-lipoxygenase by baicalein induces microglia PPARβ/δ: a potential therapeutic role for CNS autoimmune disease. Cell Death Dis 2013; 4:e569. [PMID: 23559003 PMCID: PMC3668632 DOI: 10.1038/cddis.2013.86] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [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] [Indexed: 11/09/2022]
Abstract
12/15-Lipoxygenase (12/15-LO) is an enzyme that converts polyunsaturated fatty acids into bioactive lipid derivatives. In this study, we showed that inhibition of 12/15-LO by baicalein (BA) significantly attenuated clinical severity of experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS). Inhibited migration of autoimmune T cells into the central nervous system (CNS) by BA treatment could be attributed to reduced activation of microglia, which was indicated by suppressed phagocytosis, and decreased production of proinflammatory cytokines and chemokines in the CNS. We further observed that inhibition of 12/15-LO with BA led to increased expression of peroxisome proliferator-activated receptor (PPAR)β/δ in microglia of EAE mice. This was confirmed in vitro in primary microglia and a microglia cell line, BV2. In addition, we demonstrated that BA did not affect 12/15-LO or 5-lipoxygenase (5-LO) expression in microglia, but significantly decreased 12/15-LO products without influencing the levels of 5-LO metabolites. Moreover, among these compounds only 12/15-LO metabolite 12-hydroxyeicosatetraenoic acid was able to reverse BA-mediated upregulation of PPARβ/δ in BV2 cells. We also showed that inhibition of microglia activation by PPARβ/δ was associated with repressed NF-κB and MAPK activities. Our findings indicate that inhibition of 12/15-LO induces PPARβ/δ, demonstrating important regulatory properties of 12/15-LO in CNS inflammation. This reveals potential therapeutic applications for MS.
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Affiliation(s)
- J Xu
- Shanghai Institute of Immunology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Lu B, Wang F, Shi Y, Bitter M, Hill KW, Lee SG, Fu J, Li Y, Wan B. Upgrades of the high resolution imaging x-ray crystal spectrometers on experimental advanced superconducting tokamak. Rev Sci Instrum 2012; 83:10E130. [PMID: 23126951 DOI: 10.1063/1.4738652] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Two imaging x-ray crystal spectrometers, the so-called "poloidal" and "tangential" spectrometers, were recently implemented on experimental advanced superconducting tokamak (EAST) to provide spatially and temporally resolved impurity ion temperature (T(i)), electron temperature (T(e)) and rotation velocity profiles. They are derived from Doppler width of W line for Ti, the intensity ratio of Li-like satellites to W line for Te, and Doppler shift of W line for rotation. Each spectrometer originally consisted of a spherically curved crystal and a two-dimensional multi-wire proportional counter (MWPC) detector. Both spectrometers have now been upgraded. The layout of the tangential spectrometer was modified, since it had to be moved to a different port, and the spectrometer was equipped with two high count rate Pilatus detectors (Model 100 K) to overcome the count rate limitation of the MWPC and to improve its time resolution. The poloidal spectrometer was equipped with two spherically bent crystals to record the spectra of He-like and H-like argon simultaneously and side by side on the original MWPC. These upgrades are described, and new results from the latest EAST experimental campaign are presented.
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Affiliation(s)
- B Lu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, China.
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