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Tian C, Xiong S, Li S, Song X, Zhang Y, Jiang X, Hou X, Zhang Y, Liu C. Impulse oscillometry in the diagnosis of cough variant asthma in children. BMC Pediatr 2024; 24:296. [PMID: 38702638 DOI: 10.1186/s12887-024-04749-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Accepted: 04/09/2024] [Indexed: 05/06/2024] Open
Abstract
BACKGROUND Cough variant asthma (CVA) is one of the most common causes of chronic cough in children worldwide. The diagnosis of CVA in children remains challenging. This study aimed to assess the diagnostic utility of impulse oscillometry (IOS) pulmonary function in children with CVA. METHODS This study included children aged 4 to 12 years diagnosed with CVA who underwent IOS pulmonary function and bronchodilation (BD) tests. A control group of healthy children was matched. Pre- and post-BD IOS parameters were recorded and presented as mean ± standard deviation or median. Receiver operating characteristic (ROC) curves were plotted, and the area under the curve (AUC) was calculated to evaluate the discriminatory potential of the IOS parameters for diagnosing CVA. RESULTS A total of 180 patients with CVA and 65 control subjects were included. The baseline IOS parameters in the CVA group, except X5%pred, were significantly greater compared to the control group. After inhalation of salbutamol sulfate, all IOS parameters improved significantly in the CVA group. However, Z5%pred, R5%pred, and R20%pred remained greater in the CVA group compared to the control group. The improvement rates of IOS parameters in the CVA group significantly surpassed those in the control group. The ROC curve results for pre-BD IOS parameters and the improvement rate during the BD test showed that the combinations of pre-Z5%pred+△Z5% and pre-R5%pred+△R5% achieved the highest AUC value of 0.920 and 0.898, respectively. The AUC values of these combined parameters surpassed those of individual ones. CONCLUSIONS This study highlights that children with CVA exhibit greater IOS parameters compared to healthy children. The changes in IOS parameters during the BD test provided valuable diagnostic information for CVA, and the combination of various parameters can help pediatricians accurately identify CVA in children.
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Affiliation(s)
- Chunyu Tian
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, No.2 Yabao Road, Chaoyang District, Beijing, 100020, China
| | - Shiqiu Xiong
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, No.2 Yabao Road, Chaoyang District, Beijing, 100020, China
| | - Shuo Li
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, No.2 Yabao Road, Chaoyang District, Beijing, 100020, China
| | - Xin Song
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, No.2 Yabao Road, Chaoyang District, Beijing, 100020, China
| | - Yantao Zhang
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, No.2 Yabao Road, Chaoyang District, Beijing, 100020, China
| | - Xinmei Jiang
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, No.2 Yabao Road, Chaoyang District, Beijing, 100020, China
| | - Xinyue Hou
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, No.2 Yabao Road, Chaoyang District, Beijing, 100020, China
| | - Yifan Zhang
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, No.2 Yabao Road, Chaoyang District, Beijing, 100020, China
| | - Chuanhe Liu
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, No.2 Yabao Road, Chaoyang District, Beijing, 100020, China.
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Zhang Q, Xiong S, Han W, Liu DY, Huang GN, Lin TT. [Analysis of related factors influencing the detection rate of mosaic embryo and the pregnancy outcomes with mosaic embryo transfers]. Zhonghua Fu Chan Ke Za Zhi 2024; 59:288-298. [PMID: 38644275 DOI: 10.3760/cma.j.cn112141-20240104-00010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
Objective: To explore the related factors influencing the detection rate of mosaic embryo and the pregnancy outcomes of mosaic embryo transfer in preimplantation genetic testing for aneuploidy (PGT-A) based on next generation sequencing (NGS) technology. Methods: A retrospective study was performed to analyze the clinical data of patients in 745 PGT-A cycles from January 2019 to May 2023 at Chongqing Health Center for Women and Children, including 2 850 blastocysts. The biopsy cells were tested using NGS technology, and the embryos were divided into three groups based on the test results, namely euploid embryos, aneuploid embryos and mosaic embryos. The influence of population characteristics and laboratory-related parameters on the detection rate of mosaic embryo were analyzed, and the pregnancy outcomes of 98 mosaic embryo transfer cycles and 486 euploid embryo transfer cycles were compared during the same period, including clinical pregnancy rate and live birth rate. Results: Among the embryos tested (n=2 850), the number and proportion of euploid embryos, aneuploid embryos and mosaic embryos were 1 489 (52.2%, 1 489/2 850), 917 (32.2%, 917/2 850) and 444 (15.6%, 444/2 850), respectively. Among mosaic embryos, 245 (55.2%, 245/444) were segmental mosaic embryos, 118 (26.6%, 118/444) were whole-chromosome mosaic embryos, and 81 (18.2%, 81/444) were complex mosaic embryos. NGS technology was performed in 4 genetic testing institutions and the detection rate of mosaic embryo fluctuated from 13.5% to 27.0%. The distributions of female age, level of anti-Müllerian hormone, PGT-A indications, ovulation-inducing treatments, gonadotropin (Gn) dosage, Gn days, inner cell mass grade, trophectoderm cell grade, genetic testing institutions and developmental stage of blastocyst were significantly different among the three groups (all P<0.05). Multi-factor analysis showed that the trophectoderm cell grade and genetic testing institutions were significantly related to the detection rate of mosaic embryo; compared with the trophectoderm cell graded as A, the detection rate of mosaic embryo was significantly increased in the trophectoderm cell graded as B-(OR=1.59, 95%CI: 1.04-2.44, P=0.033); compared with genetic testing institution a, the detection rate of mosaic embryo was significantly higher (OR=2.89, 95%CI: 2.10-3.98, P<0.001) in the testing institution c. The clinical pregnancy rate and live birth rate with mosaic embryos transfer were significantly lower than those of euploid embryos transfer (clinical pregnancy rate: 51.0% vs 65.2%, P=0.008; live birth rate: 39.4% vs 53.2%, P=0.017). After adjustment for age, PGT-A indications, trophectoderm cell grade and days of embryo culture in vitro, the clinical pregnancy rate and live birth rate with mosaic embryos transfer were significantly lower than those of euploid embryos transfer (clinical pregnancy rate: OR=0.52, 95%CI: 0.32-0.83, P=0.007; live birth rate: OR=0.50, 95%CI: 0.31-0.83, P=0.007). Conclusions: The trophectoderm cell grade and genetic testing institutions are related to the detection rate of mosaic embryo. Compared with euploid embryos transfer, the clinical pregnancy rate and live birth rate with mosaic embryos transfer are significantly reduced. For infertile couple without euploid embryos, transplantable mosaic embryos could be recommended according to the mosaic ratio and mosaic type in genetic counseling to obtain the optimal pregnancy outcome.
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Affiliation(s)
- Q Zhang
- Chongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children's Hospital of Chongqing Medical University, Chongqing Health Center for Women and Children, Chongqing 400010, China
| | - S Xiong
- Chongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children's Hospital of Chongqing Medical University, Chongqing Health Center for Women and Children, Chongqing 400010, China
| | - W Han
- Chongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children's Hospital of Chongqing Medical University, Chongqing Health Center for Women and Children, Chongqing 400010, China
| | - D Y Liu
- Chongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children's Hospital of Chongqing Medical University, Chongqing Health Center for Women and Children, Chongqing 400010, China
| | - G N Huang
- Chongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children's Hospital of Chongqing Medical University, Chongqing Health Center for Women and Children, Chongqing 400010, China
| | - T T Lin
- Chongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children's Hospital of Chongqing Medical University, Chongqing Health Center for Women and Children, Chongqing 400010, China
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Tian C, Xiong S, Li S, Song X, Zhang Y, Jiang X, Hou X, Zhang Y, Liu C. Spirometry in the diagnosis of cough variant asthma in children. Pediatr Pulmonol 2024; 59:291-299. [PMID: 37921541 DOI: 10.1002/ppul.26745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 10/12/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
OBJECTIVE This study aimed to assess the diagnostic utility of spirometry, particularly focusing on small airway parameters, in children with cough variant asthma (CVA). METHODS This study included children aged 5-12 years with a diagnosis of CVA. Pre- and postbronchodilation spirometry parameters, including FEV1 %pred, FVC%pred, FEV1 /FVC%pred, PEF%pred, FEF25 %pred, FEF50 %pred, FEF75 %pred, MMEF%pred, were recorded. Receiver operating characteristic curves were plotted, and the area under the curve (AUC) was calculated to assess the discriminatory potential of these spirometry parameters for CVA. A prediction model based on logistic regression (LR) was performed. RESULTS A total of 200 patients with CVA and 73 control subjects were included. Baseline spirometry parameters in the CVA group, except for FVC%pred, were significantly lower compared to the control group. After inhalation of salbutamol sulfate, all parameters showed significant improvement in the CVA group. However, these parameters, except for FEV1 %pred and FVC%pred, remained lower in the CVA group compared to the control group. The improvement rate of each parameter in the CVA group, except for ∆ FVC%, was significantly higher than that in the control group. △ MMEF% achieved the highest AUC of 0.797 with a threshold value of 16.09%, followed by △ FEF75 % (0.792), △ FEV1 % (0.756), and △ FEF50 % (0.747) with threshold values of 19.01%, 4.48%, and 19.4%, respectively. The clinical prediction model included four variables (age, △ FEF25 %, △ FEF75 %, and △ MMEF%) and demonstrated excellent performance distinguishing patients with and without CVA (AUC = 0.850). In the CVA group, the △ FEV1 % showed a positive correlation with small airway parameters. CONCLUSIONS This study highlights that children with CVA exhibit lower pulmonary function parameters compared to healthy children. Changes in small airway parameters during bronchodilator tests can be valuable in diagnosing CVA, and the LR prediction model incorporating age and several pulmonary parameters can assist physicians in accurately identifying CVA in clinical practice.
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Affiliation(s)
- Chunyu Tian
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, Beijing, China
| | - Shiqiu Xiong
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, Beijing, China
| | - Shuo Li
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, Beijing, China
| | - Xin Song
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, Beijing, China
| | - Yantao Zhang
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, Beijing, China
| | - Xinmei Jiang
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, Beijing, China
| | - Xinyue Hou
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, Beijing, China
| | - Yifan Zhang
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, Beijing, China
| | - Chuanhe Liu
- Department of Allergy, Children's Hospital Affiliated with the Capital Institute of Pediatrics, Beijing, China
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Zhu G, Xiong S, Malhotra R, Chen X, Gong E, Wang Z, Østbye T, Yan LL. Individual perceptions of community efficacy for non-communicable disease management in twelve communities in China: cross-sectional and longitudinal analyses. Public Health 2024; 226:207-214. [PMID: 38086102 DOI: 10.1016/j.puhe.2023.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 10/08/2023] [Accepted: 11/06/2023] [Indexed: 01/15/2024]
Abstract
OBJECTIVES This objective of this study was to use empirical data to assess cross-sectional variation singular and changes over time in community efficacy for non-communicable diseases (NCDs) management (COEN) and to examine individual factors associated with changes in COEN. STUDY DESIGN This was a longitudinal observational study. METHODS Participants with hypertension and diabetes were randomly selected from 12 communities from three cities in eastern China, and a baseline survey and a 1-year follow-up were conducted. The COEN scale has five dimensions: community physical environment (CPE), behavioral risk factors (BRF), mental health and social relationships (MHSR), community health management (CHM), and community organisations and activities (COA). Mixed-effects models were used to investigate the change in COEN over time and the association between individual factors and changes in COEN. RESULTS COEN scores showed significant variation singular among the 12 communities (P < 0.001) at the baseline. In the mixed-effects model, CPE (β coefficient: 1.62, P < 0.001), BRF (0.90, P < 0.001), MHSR (0.86, P < 0.001), CHM (0.46, P < 0.001), and total scores (β = 3.57, P < 0.001) increased significantly over time. The changes in COEN were associated with individual characteristics (e.g., older, men, more educated). CONCLUSIONS Cross-sectional variations and changes over time in COEN demonstrated the utility of a sensitive instrument. Factors such as age, gender, marriage, education level, and employment may affect the financial and social resources assignment for NCD management. Our findings suggest that further high-quality studies are needed to better evaluate the effect of community empowerment on the prevention and control of NCDs.
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Affiliation(s)
- G Zhu
- School of Public Health, Wuhan University, Wuhan, Hubei, China; Global Health Research Center, Duke Kunshan University, Kunshan, Jiangsu, China
| | - S Xiong
- Global Health Research Center, Duke Kunshan University, Kunshan, Jiangsu, China; The George Institute for Global Health, Faculty of Medicine and Health, University of New South Wales, Sydney, Australia
| | - R Malhotra
- Health Services and Systems Research, Duke-NUS Medical School, Singapore; Centre for Ageing Research and Education, Duke-NUS Medical School, Singapore; SingHealth, Duke-NUS Global Health Institute Medical School, Singapore
| | - X Chen
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - E Gong
- School of Population Medicine and Public Health, China Academy of Medical Science & Peking Union Medical College, Beijing, China
| | - Z Wang
- Department of Agricultural Economics, College of Agriculture, Purdue University, West Lafayette, USA
| | - T Østbye
- Global Health Research Center, Duke Kunshan University, Kunshan, Jiangsu, China; Health Services and Systems Research, Duke-NUS Medical School, Singapore; Duke Global Health Institute, Duke University, Durham, NC, USA
| | - L L Yan
- School of Public Health, Wuhan University, Wuhan, Hubei, China; Global Health Research Center, Duke Kunshan University, Kunshan, Jiangsu, China; Duke Global Health Institute, Duke University, Durham, NC, USA.
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Yin Y, Ouyang S, Li Q, Du Y, Xiong S, Zhang M, Wang W, Zhang T, Liu C, Gao Y. Salivary interleukin-17A and interferon-γ levels are elevated in children with food allergies in China. Front Immunol 2023; 14:1232187. [PMID: 38090557 PMCID: PMC10715589 DOI: 10.3389/fimmu.2023.1232187] [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: 05/31/2023] [Accepted: 11/10/2023] [Indexed: 12/18/2023] Open
Abstract
Introduction Food allergies have a substantial impact on patient health, but their mechanisms are poorly understood, and strategies for diagnosing, preventing, and treating food allergies are not optimal. This study explored the levels of and relationship between IL-17A and IFN-γ in the saliva of children with food allergies, which will form the basis for further mechanistic discoveries as well as prevention and treatment measures for food allergies. Methods A case-control study with 1:1 matching was designed. Based on the inclusion criteria, 20 case-control pairs were selected from patients at the Skin and Allergy Clinic and children of employees. IL-17A and IFN-γ levels in saliva were measured with a Luminex 200 instrument. A general linear model was used to analyze whether the salivary IL-17A and IFN-γ levels in the food allergy group differed from those in the control group. Results The general linear model showed a significant main effect of group (allergy vs. healthy) on the levels of IL-17A and IFN-γ. The mean IL-17A level (0.97 ± 0.09 pg/ml) in the food allergy group was higher than that in the healthy group (0.69 ± 0.09 pg/ml). The mean IFN-γ level (3.0 ± 0.43 pg/ml) in the food allergy group was significantly higher than that in the healthy group (1.38 ± 0.43 pg/ml). IL-17A levels were significantly positively related to IFN-γ levels in children with food allergies (r=0.79) and in healthy children (r=0.98). Discussion The salivary IL-17A and IFN-γ levels in children with food allergies were higher than those in healthy children. This finding provides a basis for research on new methods of diagnosing food allergies and measuring the effectiveness of treatment.
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Affiliation(s)
- Yan Yin
- Department of Integrated Early Childhood Development, Capital Institute of Pediatrics, Beijing, China
| | - Shengrong Ouyang
- Department of Biochemistry and Immunology, Capital Institute of Pediatrics, Beijing, China
| | - Qin Li
- Environmental Standards Institute, Chinese Research Academy of Environmental Sciences, Beijing, China
| | - Yuyang Du
- Department of Allergy, Affiliated Children’s Hospital of Capital Institute of Pediatrics, Beijing, China
| | - Shiqiu Xiong
- Department of Allergy, Affiliated Children’s Hospital of Capital Institute of Pediatrics, Beijing, China
| | - Min Zhang
- Department of Biochemistry and Immunology, Capital Institute of Pediatrics, Beijing, China
| | - Wei Wang
- Department of Biochemistry and Immunology, Capital Institute of Pediatrics, Beijing, China
| | - Ting Zhang
- Department of Biochemistry and Immunology, Capital Institute of Pediatrics, Beijing, China
| | - Chuanhe Liu
- Department of Allergy, Affiliated Children’s Hospital of Capital Institute of Pediatrics, Beijing, China
| | - Ying Gao
- Department of Dermatology, Affiliated Children’s Hospital of Capital Institute of Pediatrics, Beijing, China
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Xiong S, Chen W, Jia X, Jia Y, Liu C. Machine learning for prediction of asthma exacerbations among asthmatic patients: a systematic review and meta-analysis. BMC Pulm Med 2023; 23:278. [PMID: 37507662 PMCID: PMC10386701 DOI: 10.1186/s12890-023-02570-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND Asthma exacerbations reduce the patient's quality of life and are also responsible for significant disease burdens and economic costs. Machine learning (ML)-based prediction models have been increasingly developed to predict asthma exacerbations in recent years. This systematic review and meta-analysis aimed to identify the prediction performance of ML-based prediction models for asthma exacerbations and address the uncertainty of whether modern ML methods could become an alternative option to predict asthma exacerbations. METHODS PubMed, Cochrane Library, EMBASE, and Web of Science were searched for studies published up to December 15, 2022. Studies that applied ML methods to develop prediction models for asthma exacerbations among asthmatic patients older than five years and were published in English were eligible. The prediction model risk of bias assessment tool (PROBAST) was utilized to estimate the risk of bias and the applicability of included studies. Stata software (version 15.0) was used for the random effects meta-analysis of performance measures. Subgroup analyses stratified by ML methods, sample size, age groups, and outcome definitions were conducted. RESULTS Eleven studies, including 23 prediction models, were identified. Most of the studies were published in recent three years. Logistic regression, boosting, and random forest were the most used ML methods. The most common important predictors were systemic steroid use, short-acting beta2-agonists, emergency department visit, age, and exacerbation history. The overall pooled area under the curve of the receiver operating characteristics (AUROC) of 11 studies (23 prediction models) was 0.80 (95% CI 0.77-0.83). Subgroup analysis based on different ML models showed that boosting method achieved the best performance, with an overall pooled AUROC of 0.84 (95% CI 0.81-0.87). CONCLUSION This study identified that ML was the potential tool to achieve great performance in predicting asthma exacerbations. However, the methodology within these models was heterogeneous. Future studies should focus on improving the generalization ability and practicability, thus driving the application of these models in clinical practice.
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Affiliation(s)
- Shiqiu Xiong
- Department of Allergy, Center for Asthma Prevention and Lung Function Laboratory, Children's Hospital of Capital Institute of Pediatrics, Beijing, 100020, China.
- Graduate School, Peking Union Medical College, Beijing, 100730, China.
| | - Wei Chen
- Department of Allergy, Center for Asthma Prevention and Lung Function Laboratory, Children's Hospital of Capital Institute of Pediatrics, Beijing, 100020, China
| | - Xinyu Jia
- Department of Allergy, Center for Asthma Prevention and Lung Function Laboratory, Children's Hospital of Capital Institute of Pediatrics, Beijing, 100020, China
| | - Yang Jia
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Chuanhe Liu
- Department of Allergy, Center for Asthma Prevention and Lung Function Laboratory, Children's Hospital of Capital Institute of Pediatrics, Beijing, 100020, China.
- Graduate School, Peking Union Medical College, Beijing, 100730, China.
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Cai C, Xiong S, Millett C, Tian M, Hone T. The health system and health impacts of primary healthcare reform in China: A systematic review. Eur J Public Health 2022. [DOI: 10.1093/eurpub/ckac129.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
China has undergone a comprehensive primary healthcare(PHC) reform since 2009 aiming to deliver accessible, higher-quality, and equitable healthcare. However, there is limited understanding of the effectiveness of this reform. This systematic review synthesizes evidence on health system and health impacts of this reform.
Methods
We searched 13 international databases and three Chinese databases for quantitative studies assessing the impacts of this reform published between January 2009 and March 2020. We searched for studies in English or Mandarin. Eligible study designs were RCTs, quasi-experimental studies and controlled before-after studies. We included studies that: assessed PHC policies since 2009; had geographical, temporal or population comparators; and assessed any outcome measures of health expenditures, health service utilisation, quality of care or health outcomes. Study quality was assessed using ROBINS-I, and results synthesized narratively. PROSPERO: CRD42021239991.
Results
Of 35,480 titles, 37 studies were included (27 in English and ten in Mandarin). Eight were considered at low risk of bias. The 37 studies covered all major PHC policies since 2009, but mostly focused on the essential medicine (N = 15) and financing (N = 10). The quantity and quality of studies on service delivery policies(e.g., family physician and essential health services), were low(N = 3,with moderate or serious risk of bias). 17 studies found that the PHC reforms promoted primary care utilisation. Its impacts on quality and health improvement appear limited to people with chronic diseases(N = 11). Evidence on primary care costs and OOPs were not clear. Some evidence showed that the reforms were pro-equity with benefits accrued in disadvantaged regions and groups.
Conclusions
Comprehensive PHC reforms can deliver some benefits related to utilisation and health for high-risk and vulnerable populations. Policymakers should continue to prioritize PHC to achieve Universal Health Coverage.
Key messages
• The finding suggests that large-scale and comprehensive primary healthcare reforms can deliver benefits related to utilisation and health for high-risk and vulnerable populations.
• Future research should include more robust study designs and seek to better understand the impact of major PHC reforms on quality of care, health outcomes and equity.
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Affiliation(s)
- C Cai
- Public Health Policy Evaluation Unit, Imperial College London , London, UK
| | - S Xiong
- George Institute for Global Health, University of New South Wales The , Sydney, Australia
- Global Health Research Centre, Duke Kunshan University , Kunshan, China
| | - C Millett
- Public Health Policy Evaluation Unit, Imperial College London , London, UK
- National School of Public Health, NOVA University , Lisbon, Portugal
| | - M Tian
- George Institute for Global Health, University of New South Wales The , Sydney, Australia
- School of Public Health, Harbin Medical University , Harbin, China
| | - T Hone
- Public Health Policy Evaluation Unit, Imperial College London , London, UK
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Liang W, Li C, Li J, Xiong S, Cheng B, Liang H, Zhong N, He J. LBA48 Community-based mass screening with low-dose CT for lung cancer in Guangzhou. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.08.048] [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] Open
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Zhang T, Liu ZJ, Liu SZ, Cheng JN, Yang L, Zhou R, Guo LP, Yang L, Xiong S, Ju JH. [Clinical effects of free superficial peroneal artery perforator flaps in repairing skin and soft tissue defects of the hallux]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2022; 38:753-758. [PMID: 36058698 DOI: 10.3760/cma.j.cn501120-20210604-00211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To explore the clinical effects of free superficial peroneal artery perforator flaps in repairing skin and soft tissue defects of the hallux. Methods: A retrospective observational study was conducted. From January 2020 to January 2021, 13 patients with skin and soft tissue defects of the hallux who met the inclusion criteria were admitted to Department of Foot and Ankle Surgery of Ruihua Affiliated Hospital of Soochow University, including 12 males and 1 female, aged 26 to 53 years. Before operation, the perforating point of the superficial peroneal artery perforator was located by color Doppler ultrasound on the calf on the same side of the affected hallux and marked on the body surface. The operation was performed under spinal anesthesia combined with continuous epidural anesthesia. The area of skin and soft tissue defect after debridement was 4.5 cm×2.5 cm to 12.0 cm×3.0 cm. According to the size and shape of the wound, the superficial peroneal artery perforator flap was designed with the line between the fibular head and the lateral malleolus tip parallel shifting 2 cm to the tibial side as the flap axis line, and the perforating point of the perforator near the midpoint of the axis line as the center. The cut area of the flap was 5.0 cm×3.0 cm to 13.0 cm×4.0 cm, and part of the deep fascia was cut when the pedicle was freed. The donor site wound was sutured directly. During the operation, the number and type of the perforator and the cutting time of the flap were recorded, and the length of the perforator pedicle and diameter of the perforator were measured. The survival of the flap, the healing time and the healing condition of the donor and recipient areas were recorded after operation. The color, texture, elasticity of the flap, standing and walking functions of patients, the recovery of the donor area, and the patients' satisfaction with the recovery of the donor and recipient areas were recorded during the follow-up. At the last follow-up, the sensation of the flap was evaluated by the British Medical Association sensory function evaluation standard, the function of the affected limb was evaluated by the American Society of Foot and Ankle Surgery scoring system, and the excellent and good rate of the function of the affected limb was calculated. Results: A total of 13 perforators of the superficial peroneal artery were detected during the operation, all of which were septocutaneous perforators, and the perforator diameter was 0.3 to 0.5 mm. The vascular pedicle length was 2 to 5 cm. Flap cutting time was 11 to 26 minutes. The flaps of 13 patients all survived completely. The wounds at the donor and recipient sites healed well 9 to 18 days after operation. During follow-up of 6 to 14 months, the flaps had good color, texture, and elasticity; 11 patients had no obvious bloated appearance, and the other 2 patients underwent flap thinning and plastic surgery in the second stage because of their bloated appearance; all the patients returned to normal walking and standing functions. There was only one linear scar left in the donor site, with no obvious scar hyperplasia or hyperpigmentation. All the patients were satisfied with the recovery of the donor and recipient areas. At the last follow-up, the sensation of the flap was evaluated as grade S3 in 2 cases, grade S2 in 9 cases, and grade S1 in 2 cases; the function of the affected limb was evaluated as excellent in 7 cases and good in 6 cases, with an excellent and good rate of 100%. Conclusions: The free superficial peroneal artery perforator flap has relatively constant vascular anatomy, which is thin and wear-resistant, with less damage to the donor site after flap excision, and can preserve the shape and function of the hallux to the greatest extent. It is an effective method for repairing skin and soft tissue defect of the hallux.
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Affiliation(s)
- T Zhang
- Department of Hand Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
| | - Z J Liu
- Department of Hand Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
| | - S Z Liu
- Department of Hand Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
| | - J N Cheng
- Department of Hand Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
| | - L Yang
- Department of Hand Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
| | - R Zhou
- Department of Foot and Ankle Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
| | - L P Guo
- Department of Foot and Ankle Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
| | - L Yang
- Department of Foot and Ankle Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
| | - S Xiong
- Department of Pediatric Orthopedics, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
| | - J H Ju
- Department of Hand Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
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10
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Zhu Y, Zhang X, Xie S, Bao W, Chen J, Wu Q, Lai X, Liu L, Xiong S, Peng Y. Oxidative Phosphorylation Regulates Interleukin-10 Production in Regulatory B Cells via the Extracellular Signal-related Kinase Pathway. Immunol Suppl 2022; 167:576-589. [PMID: 35899990 DOI: 10.1111/imm.13554] [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: 11/17/2021] [Accepted: 06/07/2022] [Indexed: 11/29/2022]
Abstract
Regulatory B cells (Bregs) are immune cells that constrain autoimmune response and restrict inflammation via their expression of interleukin (IL)-10. However, the molecular mechanisms underlying Breg differentiation and IL-10 secretion remain unclear. Previous data suggest that cellular metabolism determines both the fate and function of these cells. Here, we suggest an essential role for mitochondrial oxidative phosphorylation (OXPHOS) in the regulation of IL-10 in these Bregs. We found that IL-10+ B cells from IL-10-green fluorescent protein-expressing mice had higher oxygen consumption rate than IL-10- B cells. In addition, inhibition of OXPHOS decreased the expression of IL-10 in B cells. Further, suppression of OXPHOS diminished the expression of surface markers for Bregs and impaired their therapeutic effects in dextran sulfate sodium (DSS)-induced colitis. Mechanistically, mitochondrial OXPHOS was found to regulate the transcription factor HIF-1α through the extracellular signal-related kinase pathway. Taken together, this study reveals a strong correlation between mitochondrial OXPHOS and Breg phenotype/function, indicating OXPHOS as a therapeutic target in autoimmune diseases driven by Breg dysfunction.
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Affiliation(s)
- Yinhong Zhu
- The Biotherapy Center, the Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Xiaoran Zhang
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Shujuan Xie
- The Biotherapy Center, the Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Weijia Bao
- Department of Rheumatology, the First Affiliated Hospital, Sun Yat-sen U niversity, Guangzhou, China
| | - Jingrou Chen
- The Biotherapy Center, the Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Qili Wu
- Medical Research Center of Guangdong Provincial People's Hospital, 106 Zhongshan Road 2, Guangzhou, China
| | - Xiaorong Lai
- Department of Oncology Medicine, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Longshan Liu
- Organ Transplant Center, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shiqiu Xiong
- Cell Biology group, National Measurement Lab, LGC. Fordham, Cambridgeshire, UK
| | - Yanwen Peng
- The Biotherapy Center, the Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
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11
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Meng X, Cui X, Shao X, Liu Y, Xing Y, Smith V, Xiong S, Macip S, Chen Y. poly(I:C) synergizes with proteasome inhibitors to induce apoptosis in cervical cancer cells. Transl Oncol 2022; 18:101362. [PMID: 35151092 PMCID: PMC8842080 DOI: 10.1016/j.tranon.2022.101362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 01/28/2022] [Indexed: 11/24/2022] Open
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12
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Wang H, Li J, Xiong S, Yu Z, Li F, Zhong R, Li C, Liang H, Deng H, Chen Z, Cheng B, Liang W, He J. 199P The relative impact of surgery history on cancer risk in patients less than 60 years old. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.02.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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13
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Xiong S, Jia Y, Liu C. IgE-expressing long-lived plasma cells in persistent sensitization. Front Pediatr 2022; 10:979012. [PMID: 36545659 PMCID: PMC9760851 DOI: 10.3389/fped.2022.979012] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 11/17/2022] [Indexed: 12/12/2022] Open
Abstract
Persistent allergies affect the quality of life of patients and increase economic burdens. Many clinical observations indicate the presence of IgE+ long-lived plasma cells (LLPCs), which account for the persistent secretion of specific IgE; however, the characteristics of the IgE+ LLPCs have yet to be identified clearly. In this review, we summarized the generation of IgE+ PCs, discussed the prosurvival factors in the microenvironment, and reviewed the unique IgE-BCR signaling, which may bring insights into understanding the survival mechanisms of IgE+ LLPCs.
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Affiliation(s)
- Shiqiu Xiong
- Department of Allergy, Center for Asthma Prevention and Lung Function Laboratory, Children's Hospital of Capital Institute of Pediatrics, Beijing, China.,Department of Pediatrics, Graduate School of Peking Union Medical College, Beijing, China
| | - Yang Jia
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Chuanhe Liu
- Department of Allergy, Center for Asthma Prevention and Lung Function Laboratory, Children's Hospital of Capital Institute of Pediatrics, Beijing, China.,Department of Pediatrics, Graduate School of Peking Union Medical College, Beijing, China
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14
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Liu C, Li X, Shuai L, Dang X, Peng F, Zhao M, Xiong S, Liu Y, He Q. Astragaloside IV Inhibits Galactose-Deficient IgA1 Secretion via miR-98-5p in Pediatric IgA Nephropathy. Front Pharmacol 2021; 12:658236. [PMID: 33935780 PMCID: PMC8085534 DOI: 10.3389/fphar.2021.658236] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 03/29/2021] [Indexed: 12/02/2022] Open
Abstract
Purpose: The factor associated with IgA nephropathy (IgAN) is an abnormality of IgA known as galactose-deficient IgA1 (Gd-IgA1). The purpose of this study was to determine the molecular role played by miRNAs in the formation of Gd-IgA1 in IgAN and investigate the regulatory role of Astragaloside IV (AS-IV) in miRNAs. Patients and methods: Bioinformatics analysis, along with functional and mechanistic experiments, were used to investigate the relationship and function of miRNA, β-1, 3-galactosyltransferase (C1GALT1), Gd-IgA1, and AS-IV. Analyses involved a series of tools, including quantitative real-time polymerase chain reaction (qRT-qPCR), Western blot, enzyme-linked immunosorbent assay (ELISA), Vicia Villosa lectin-binding assay (VVA), Cell counting kit-8 assay (CCK-8), and the dual-luciferase reporter assay. Results: miRNA screening and validation showed that miR-98-5p was significantly upregulated in the peripheral blood mononuclear cells (PBMCs) of pediatric patients with IgAN compared with patients diagnosed with mesangial proliferative glomerulonephritis (MsPGN) and immunoglobulin A vasculitis nephritis (IgAV-N), and healthy controls (p < 0.05). Experiments with the dual-luciferase reporter confirmed that miR-98-5p might target C1GALT1. The overexpression of miR-98-5p in DAKIKI cells decreased both the mRNA and protein levels of C1GALT1 and increased the levels of Gd-IgA1 levels; these effects were reversed by co-transfection with the C1GALT1 plasmid, and vice versa. In addition, AS-IV downregulated the levels of Gd-IgA1 level in DAKIKI cells by inhibiting miR-98-5p. Conclusions: Our results revealed that AS-IV could inhibit Gd-IgA1 secretion via miR-98-5p. Increased levels of miR-98-5p in pediatric IgAN patients might affect the glycosylation of IgA1 by targeting C1GALT1. In addition, our analyses suggest that the pathogenesis of IgAN may differ from that of IgAV-N. Collectively, these results provide significant insight into the pathogenesis of IgAN and identify a potential therapeutic target.
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Affiliation(s)
- Caiqiong Liu
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Department of Pediatrics Nephrology, Children's Medical Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xiaoyan Li
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Department of Pediatrics Nephrology, Children's Medical Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Lanjun Shuai
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Department of Pediatrics Nephrology, Children's Medical Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xiqiang Dang
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Department of Pediatrics Nephrology, Children's Medical Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Fangrong Peng
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Department of Pediatrics Nephrology, Children's Medical Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Mingyi Zhao
- Department of Pediatrics, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Shiqiu Xiong
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Department of Pediatrics Nephrology, Children's Medical Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Ying Liu
- Department of Pediatrics, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Qingnan He
- Department of Pediatrics, The Third Xiangya Hospital, Central South University, Changsha, China
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15
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Xiong S, Jia Y, Li S, Huang P, Xiong J, Mao D, He Q, Liu L. The First Case Report of X-Linked Sideroblastic Anemia With Ataxia of Chinese Origin and Literature Review. Front Pediatr 2021; 9:692459. [PMID: 34354969 PMCID: PMC8329551 DOI: 10.3389/fped.2021.692459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 06/07/2021] [Indexed: 11/13/2022] Open
Abstract
X-linked sideroblastic anemia with ataxia (XLSA/A) is a rare X-liked inherited disease, which was linked to the ABCB7 gene mutations. So far, five families have been reported worldwide. We present the first Chinese family of XLSA/A with novel ABCB7 gene mutation (c.2024A > G) and make a retrospective literature review. All affected patients were male. Age of symptom onset was <2 years old. The main symptoms included ataxia, delay in motor development, and mild sideroblastic anemia with obviously increased erythrocyte protoporphyrin. In this case, he had new symptoms that had not been reported in other cases such as epilepsy and cryptorchidism. We also discuss the possible molecular mechanism linking ABCB7 gene mutations to sideroblastic anemia and ataxia.
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Affiliation(s)
- Shiqiu Xiong
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yang Jia
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Shijun Li
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Peng Huang
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Jie Xiong
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Dingan Mao
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Qingnan He
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Liqun Liu
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
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16
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Yang J, Xiong X, Xiao Y, Wei L, Li L, Yang M, Han Y, Zhao H, Li C, Jiang N, Xiong S, Zeng L, Zhou Z, Liu S, Wang N, Fan Y, Sun L. The single nucleotide polymorphism rs11643718 in SLC12A3 is associated with the development of diabetic kidney disease in Chinese people with type 2 diabetes. Diabet Med 2020; 37:1879-1889. [PMID: 32634861 PMCID: PMC7589246 DOI: 10.1111/dme.14364] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 06/13/2020] [Accepted: 07/01/2020] [Indexed: 01/05/2023]
Abstract
AIMS To examine the association between 24 literature-based single nucleotide polymorphisms and diabetic kidney disease in Chinese people with type 2 diabetes. METHODS AND RESULTS Twenty-four candidate diabetic kidney disease-susceptible single nucleotide polymorphisms were genotyped in 208 participants with type 2 diabetes and diabetic kidney disease and 200 participants with type 2 diabetes without diabetic kidney disease (case and control groups, respectively), together with 206 healthy participants using MassARRAY. Rs11643718 in the SLC12A3 gene was associated with diabetic kidney disease in the recessive model after adjusting for confounding factors, such as age and gender (adjusted odds ratio 2.056, 95% CI 1.120-3.776; P = 0.020). Meta-analyses further confirmed the association (P = 0.002). In addition, participants with the GG genotype had worse renal function and more albuminuria than those with the AA+AG genotype (P < 0.05). Renal section immunohistochemistry was conducted in participants with type 2 diabetes, diabetic kidney disease and AA+AG or GG genotypes and in participants with glomerular minor lesions. Together with data from the Nephroseq database, it was shown that the abundance of SLC12A3 was reduced in patients with the GG genotype, while elevated expression of SLC12A3 was associated with better renal function. In addition, rs10951509 and rs1345365 in ELMO1, which were determined to be in high linkage disequilibrium by SHEsis software, were also associated with diabetic kidney disease (adjusted P = 0.010 and 0.015, respectively). CONCLUSIONS The G allele and GG genotype of SLC12A3 rs11643718 are associated with the development of diabetic kidney disease in a Chinese population with type 2 diabetes.
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Affiliation(s)
- J.‐F. Yang
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - X.‐F. Xiong
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - Y. Xiao
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - L. Wei
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - L. Li
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - M. Yang
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - Y.‐C. Han
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - H. Zhao
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - C.‐R. Li
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - N. Jiang
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - S. Xiong
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - L.‐F. Zeng
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
| | - Z.‐G. Zhou
- National Clinical Research Centre for Metabolic Diseases Diabetes CentreDepartment of EndocrinologySecond Xiangya Hospital at Central South UniversityChangshaChina
| | - S.‐P. Liu
- National Clinical Research Centre for Metabolic Diseases Diabetes CentreDepartment of EndocrinologySecond Xiangya Hospital at Central South UniversityChangshaChina
| | - N.‐S. Wang
- Department of NephrologyShanghai Jiao Tong University Affiliated Sixth People's HospitalShanghaiChina
| | - Y. Fan
- Department of NephrologyShanghai Jiao Tong University Affiliated Sixth People's HospitalShanghaiChina
| | - L. Sun
- Department of NephrologyHunan Key Laboratory of Kidney Disease and Blood PurificationSecond Xiangya Hospital at Central South UniversityChangshaChina
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17
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Wu Q, Chen J, Hu X, Zhu Y, Xie S, Wu C, Pei Z, Xiong S, Peng Y. Amphiregulin alleviated concanavalin A-induced acute liver injury via IL-22. Immunopharmacol Immunotoxicol 2020; 42:473-483. [PMID: 32806961 DOI: 10.1080/08923973.2020.1810271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 08/07/2020] [Indexed: 01/21/2023]
Abstract
OBJECTIVES Amphiregulin (Areg), a glycoprotein from the epidermal growth factor receptor (EGFR) ligand family, has a well-documented protective role against tissue injury; however, its effects on immune-mediated liver injury are still unclear. Here, we used a concanavalin A (ConA)-induced acute liver hepatitis model to explore the effects of Areg on immune-mediated acute liver injury. MATERIALS AND METHODS Some C57BL/6 mice were administered ConA at a dose of 20 mg/kg (model mice), and some received 5 µg of Areg (treated mice). Then, their survival rates over 36 h were analyzed. After 5 h of treatment, liver function, hepatic histology, and apoptosis in liver tissue were investigated, and cytokine expression and neutrophil infiltration and activity in the liver were detected. Moreover, the protective effects of Areg were also evaluated without IL-22 in vivo. RESULTS Our results showed that Areg administration increased acute liver failure (ALF) mouse survival, restored liver function, and alleviated liver damage. Interestingly, Areg administration increased IL-22 production in hepatic T cells and upregulated IL-22 concentrations in the serum and liver, whereas IL-22 neutralization completely abolished the therapeutic effect of Areg. Meanwhile, Areg administration was concomitant with increased expression of the anti-apoptotic proteins Bcl-2 and Bcl-xL, which are important in the hepatoprotective mechanism of IL-22. CONCLUSIONS Areg showed direct protective effects against ConA-induced acute liver injury, which suggests the potential therapeutic application of Areg in immune-mediated ALF.
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Affiliation(s)
- Qili Wu
- The Biotherapy Center, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, PR China
| | - Jingrou Chen
- The Biotherapy Center, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, PR China
| | - Xiaoli Hu
- Department of Operative Dentistry and Endodontics, Guanghua School and Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China
| | - Yinhong Zhu
- The Biotherapy Center, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, PR China
| | - Shujuan Xie
- The Biotherapy Center, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, PR China
| | - Changyou Wu
- Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, PR China
| | - Zhong Pei
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, PR China
| | - Shiqiu Xiong
- Cell Biology group, National Measurement Lab, LGC, Fordham, Cambridgeshire, UK
| | - Yanwen Peng
- The Biotherapy Center, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, PR China
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18
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Rajagopal D, Tian L, Xiong S, Wang L, Campbell J, Saraiva L, Vessillier S. An accurate and rapid single step protocol for enumeration of cytokine positive T lymphocytes. ACTA ACUST UNITED AC 2020; 9. [PMID: 34095644 DOI: 10.1016/j.regen.2020.100032] [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] [Indexed: 11/29/2022]
Abstract
Accurate determination of cellular subsets that secrete particular cytokine(s) is a significant parameter for functional characterization of an immunological response. The present study was conducted to develop a method for simultaneous measurement of intracellular cytokine positive CD4 and CD8 positive T lymphocytes in a single tube, with a no-wash protocol. We report here the development of a simplified, rapid procedure for precise enumeration of cytokine positive T lymphocytes using BD Trucount tubes. This single step protocol for accurate enumeration of cytokine positive T lymphocytes, will allow for better characterization of immune cell phenotype and function.
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Affiliation(s)
- Deepa Rajagopal
- Biotherapeutics Division, National Institute for Biological Standards and Control (NIBSC), Blanche Lane, South Mimms, Potters Bar, Hertfordshire, EN6 3QG, UK
| | - Linhua Tian
- Biosystems and Biomaterials Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, 20899, USA
| | - Shiqiu Xiong
- Health Science & Innovation, LGC Ltd., Queens Road, Teddington, Middlesex, TN11 0LY, UK
| | - Lili Wang
- Biosystems and Biomaterials Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, 20899, USA
| | - Jonathan Campbell
- Health Science & Innovation, LGC Ltd., Queens Road, Teddington, Middlesex, TN11 0LY, UK
| | - Luisa Saraiva
- Biotherapeutics Division, National Institute for Biological Standards and Control (NIBSC), Blanche Lane, South Mimms, Potters Bar, Hertfordshire, EN6 3QG, UK
| | - Sandrine Vessillier
- Biotherapeutics Division, National Institute for Biological Standards and Control (NIBSC), Blanche Lane, South Mimms, Potters Bar, Hertfordshire, EN6 3QG, UK
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19
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Peng Y, Wu Q, Tang H, Chen J, Wu Q, Yuan X, Xiong S, Ye Y, Lv H. NLRP3 Regulated CXCL12 Expression in Acute Neutrophilic Lung Injury. J Inflamm Res 2020; 13:377-386. [PMID: 32801831 PMCID: PMC7399452 DOI: 10.2147/jir.s259633] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 04/30/2020] [Accepted: 07/02/2020] [Indexed: 12/18/2022] Open
Abstract
Background and Purpose Both NLRP3 inflammasome and chemokines are involved in the initiation and development of acute lung inflammation, but the underlying mechanism is still elusive. The present study investigated the role of chemokines and NLRP3 in recruiting neutrophils in the early phase of acute lung injury. Methods In an endotoxin (lipopolysaccharide [LPS])-induced acute lung injury model, we measured the lung injury severity, myeloperoxidase (MPO) activity and chemokine profiles in wild-type (WT) and NLRP3 knockout (NLRP3–/–) mice, and then identified the key chemokines by specific antibody blockage. Results The results showed that NLRP3 deficiency was associated with alleviating lung damage, by reducing alveolar epithelial cell apoptosis and decreasing neutrophil accumulation. Furthermore, compared with WT mice, IL-1β, CCL2, CXCL1, CXCL5 and CXCL12 levels from the serum of NLRP3–/– mice were much lower after exposure to LPS. However, in lung tissue, only lower CXCL12 levels were observed from the NLRP3–/– ALI mice, and higher levels of CXCR4 were expressed in NLRP3–/– neutrophils. Blockage of CXCL12 dramatically relieved the severity of ALI and reduced neutrophil accumulation in the lung. Conclusion NLRP3 alters CXCL12 expression in acute lung injury. CXCL12 is crucial for neutrophil recruitment in NLRP3-mediated neutrophilic lung injury.
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Affiliation(s)
- Yanwen Peng
- The Biotherapy Center, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, People's Republic of China
| | - Qiongli Wu
- Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, People's Republic of China
| | - Hao Tang
- Department of General Practice, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, People's Republic of China
| | - Jingrou Chen
- The Biotherapy Center, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, People's Republic of China
| | - Qili Wu
- The Biotherapy Center, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, People's Republic of China
| | - Xiaofeng Yuan
- The General Intensive Care Unit, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, People's Republic of China
| | - Shiqiu Xiong
- Cell Biology Group, National Measurement Lab, LGC Fordham, Cambridgeshire CB7 5WW, UK
| | - Yujin Ye
- Department of Rheumatology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, People's Republic of China
| | - Haijin Lv
- The Surgical and Transplant Intensive Care Unit, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, People's Republic of China
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20
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Xiong S, Shuai L, Li X, Dang X, Wu X, He Q. Podocytic infolding in Schimke immuno-osseous dysplasia with novel SMARCAL1 mutations: a case report. BMC Nephrol 2020; 21:170. [PMID: 32393263 PMCID: PMC7216528 DOI: 10.1186/s12882-020-01809-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 04/15/2020] [Indexed: 11/18/2022] Open
Abstract
Background Schimke immuno-osseous dysplasia (SIOD) is a rare autosomal recessive disorder characterized by spondyloepiphyseal dysplasia, progressive renal insufficiency and defective cellular immunity. Podocytic infolding glomerulopathy (PIG) is a newly proposed disease entity characterized by microspheres or microtubular structures associated with podocytes infolding into the glomerular basement membrane (GBM) on electron microscopy (EM). Case presentation A 4-year-old boy was admitted to our ward due to proteinuria and edema lasting 1 month. He had a short trunk and demonstrated subtle dysmorphology, with a triangular shape, a broad nasal bridge and a bulbous nasal tip. The laboratory findings were as follows: lymphocytes, 0.5 × 109/L; urine protein, 3.67 g/d; albumin, 9.8 g/L; and cholesterol, 11.72 mmol/L. Skeletal X rays showed small iliac wings, small ossification centers of the capital femoral epiphyses, shallow dysplastic acetabular fossae and mildly flattened vertebrae. The specimen for light microscopy (LM) suggested focal segmental glomerulosclerosis (FSGS). EM revealed a focal thickness of the GBM with some cytoplasmic processes of podocyte infolding into the GBM. Gene sequencing showed novel compound heterozygous mutations in the SMARCAL1 gene (c.2141 + 5G > A; c.2528 + 1G > A) that were inherited from his parents. Finally, we established the diagnosis of SIOD and treated him with diuretics and angiotensin-converting enzyme inhibitors (ACEIs). Conclusion The pathogenic mechanism of PIG has not been clarified. Further studies are required to understand whether gene mutations, especially those related to podocytes, contribute to the pathogenesis of podocytic infolding.
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Affiliation(s)
- Shiqiu Xiong
- Department of Pediatrics, the Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Lanjun Shuai
- Department of Pediatrics, the Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Xiaoyan Li
- Department of Pediatrics, the Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Xiqiang Dang
- Department of Pediatrics, the Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Xiaochuan Wu
- Department of Pediatrics, the Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
| | - Qingnan He
- Department of Pediatrics, the Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
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21
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Affiliation(s)
- M. A. Abd Elgawad
- School of Computer Science and Technology, Wuhan University of Technology, Wuhan, China
- Department of Mathematics, Faculty of Science, Benha University, Benha, Egypt
| | - H. M. Barakat
- Department of Mathematics, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - S. Xiong
- School of Computer Science and Technology, Wuhan University of Technology, Wuhan, China
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22
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Xiong S, Song Y, Ma FR. [The role of prefrontal cortex in the central mechanism of tinnitus]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2020; 55:172-176. [PMID: 32074761 DOI: 10.3760/cma.j.issn.1673-0860.2020.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- S Xiong
- Department of Otorhinolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing 100191, China
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23
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Zhang N, Wang Q, Tian Y, Xiong S, Li G, Xu L. Expressions of IL-17 and TNF-α in patients with Hashimoto's disease combined with thyroid cancer before and after surgery and their relationship with prognosis. Clin Transl Oncol 2019; 22:1280-1287. [PMID: 31873916 DOI: 10.1007/s12094-019-02253-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 11/27/2019] [Indexed: 01/27/2023]
Abstract
OBJECTIVE This study aimed to investigate expressions and clinical significance of IL-17 and TNF-α after surgery in patients with Hashimoto's disease (HD) combined with thyroid cancer (TC). PATIENTS AND METHODS From June 2010 to October 2012, 38 patients with HD combined with TC admitted to the oncology department of Tongji Hospital were selected as an experimental group, including three males and 35 females, aged 24-78 years. Forty adults undergoing physical examination during the same period were selected as a control group. All patients in the experimental group were given total endoscopic TC resection. Real-time fluorescence quantification (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA) were used to detect the expression levels of serum IL-17 and TNF-α before and 14 days after surgery. Patients with HD combined with TC were divided into high and low expression groups according to the median values of preoperative IL-17 mRNA and TNF-α mRNA. The relationship between IL-17, TNF-α, and prognosis of patients was analyzed through K-M survival curve. RESULTS The concentrations of IL-17 and TNF-α in serum were also higher than those in control group 14 days after surgery (p < 0.05). qRT-PCT showed that the relative expressions of IL-17 and TNF-α in serum 14 days after surgery were higher than those in control group (p < 0.05). According to the relative expression median of mRNA in IL-17 and TNF-α before surgery, they were divided into high and low expression groups. It was found that the survival rate of high expression groups of IL-17 and TNF-α was lower than that of low expression groups (IL-17, p = 0.028; TNF-α, p = 0.014). CONCLUSIONS The protein and mRNA of IL-17 and TNF-α in serum of HD patients with TC are higher than those of healthy control group. Expressions of IL-17 and TNF-α can be reduced by surgical resection of focal tissue. IL-17 and TNF-α may be used as potential prognostic indicators of HD patients with TC.
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Affiliation(s)
- N Zhang
- Department of Throracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
| | - Q Wang
- Department of Throracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
| | - Y Tian
- Department of Throracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
| | - S Xiong
- Department of Cardiothroracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095 Jiefang Avenue, Wuhan, 430030, People's Republic of China
| | - G Li
- Department of Cardiothroracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095 Jiefang Avenue, Wuhan, 430030, People's Republic of China
| | - L Xu
- Department of Cardiothroracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095 Jiefang Avenue, Wuhan, 430030, People's Republic of China.
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24
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Xiong S, Ju JH, Jin GZ, Zhu CK, Zhang GL, Tang LF, Zhou GL. [Multiple free homologous superficial peroneal artery perforator flaps of crus for repair of multiple hand wounds]. Zhonghua Shao Shang Za Zhi 2019; 35:655-660. [PMID: 31594183 DOI: 10.3760/cma.j.issn.1009-2587.2019.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the effects of multiple free homologous superficial peroneal artery perforator flaps of crus for repair of multiple hand wounds. Methods: From November 2017 to December 2018, eight cases with eighteen hand wounds were hospitalized in our unit. Among them, wounds were distributed in the forefinger and middle finger in four cases, wounds were distributed in the middle finger and ring finger in two cases, wounds were distributed in the forefinger, middle finger, and ring finger in one case, and wounds were distributed in the middle finger, ring finger, and little finger in one case. The area of skin defect ranged from 1.5 cm×0.8 cm to 4.0 cm×3.0 cm. There were 4 males and 4 females, aged 34-62 years. Wounds of six cases were repaired by two free superficial peroneal artery perforator flaps from homolateral crus, and those of two cases were repaired by three free superficial peroneal artery perforator flaps from homolateral crus. Superficial peroneal artery and its accompanying vein of flap were anastomosed by end to end with digital artery and palmar or dorsal subcutaneous vein of recipient site during the operation. The area of flap ranged from 2.5 cm×1.2 cm to 5.0 cm×4.0 cm. No nerve was harvested during the operation, and donor site was sutured directly. The survival of the flaps and the healing of donor sites were recorded. During follow-up, the recovery of donor and recipient sites was observed. Results: All flaps survived well, donor site healed well. No vascular crisis occurred. Follow-up for 4 to 12 months showed that the appearance of flap was satisfactory with good color, texture, elasticity, and function. Protective sensation of recipient site was recovered. Five months after operation, flap of finger pulp in one case was swollen slightly with two-points discrimination of 10 mm, which received the thinning surgery. Obvious scar formation was not observed in donor site of crus. The appearance of the donor site was good without functional damage. Conclusions: The application of multiple free homologous superficial peroneal artery perforator flaps of crus to repair the multiple hand wounds has advantages of easy acquisition, easy operation, little effect on donor sites, and satisfactory clinical effects.
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Affiliation(s)
- S Xiong
- Department of Hand Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
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25
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Shi YZ, Xiong S, Zhang Y, Chin LK, Chen YY, Zhang JB, Zhang TH, Ser W, Larsson A, Lim SH, Wu JH, Chen TN, Yang ZC, Hao YL, Liedberg B, Yap PH, Wang K, Tsai DP, Qiu CW, Liu AQ. Author Correction: Sculpting nanoparticle dynamics for single-bacteria-level screening and direct binding-efficiency measurement. Nat Commun 2019; 10:1227. [PMID: 30862795 PMCID: PMC6414671 DOI: 10.1038/s41467-019-09171-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Y Z Shi
- School of Mechanical Engineering, Xi'an Jiaotong University, 710049, Xi'an, China.,School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - S Xiong
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
| | - Y Zhang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - L K Chin
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Y-Y Chen
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - J B Zhang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - T H Zhang
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583, Singapore
| | - W Ser
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - A Larsson
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - S H Lim
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - J H Wu
- School of Mechanical Engineering, Xi'an Jiaotong University, 710049, Xi'an, China
| | - T N Chen
- School of Mechanical Engineering, Xi'an Jiaotong University, 710049, Xi'an, China
| | - Z C Yang
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, 100871, Beijing, China
| | - Y L Hao
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, 100871, Beijing, China
| | - B Liedberg
- Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - P H Yap
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - K Wang
- College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan.,Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - D P Tsai
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - C-W Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583, Singapore. .,SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University, 518060, Shenzhen, China.
| | - A Q Liu
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore. .,National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, 100871, Beijing, China.
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26
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Chen Y, Peubez C, Smith V, Xiong S, Kocsis-Fodor G, Kennedy B, Wagner S, Balotis C, Jayne S, Dyer MJS, Macip S. CUDC-907 blocks multiple pro-survival signals and abrogates microenvironment protection in CLL. J Cell Mol Med 2018; 23:340-348. [PMID: 30353642 PMCID: PMC6307843 DOI: 10.1111/jcmm.13935] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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] [Received: 07/03/2018] [Revised: 08/08/2018] [Accepted: 09/03/2018] [Indexed: 12/27/2022] Open
Abstract
CUDC‐907, a dual PI3K/HDAC inhibitor, has been proposed to have therapeutic potential in hematopoietic malignancies. However, the molecular mechanisms of its effects in chronic lymphocytic leukaemia (CLL) remain elusive. We show that CLL cells are sensitive to CUDC‐907, even under conditions similar to the protective microenvironment of proliferation centres. CUDC‐907 inhibited PI3K/AKT and HDAC activity, as expected, but also suppressed RAF/MEK/ERK and STAT3 signalling and reduced the expression of anti‐apoptotic BCL‐2 family proteins BCL‐2, BCL‐xL, and MCL‐1. Moreover, CUDC‐907 downregulated cytokines BAFF and APRIL and their receptors BAFFR, TACI, and BCMA, thus blocking BAFF‐induced NF‐κB signalling. T cell chemokines CCL3/4/17/22 and phosphorylation of CXCR4 were also reduced by CUDC‐907. These data indicated that CUDC‐907 abrogates different protective signals and suggested that it might sensitize CLL cells to other drugs. Indeed, combinations of low concentrations of CUDC‐907 with inhibitors of BCL2, BTK, or the NF‐κB pathway showed a potent synergistic effect. Our data indicate that, apart from its known functions, CUDC‐907 blocks multiple pro‐survival pathways to overcome microenvironment protection in CLL cells. This provides a rationale to evaluate the clinical relevance of CUDC‐907 in combination therapies with other targeted inhibitors.
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Affiliation(s)
- Yixiang Chen
- Mechanisms of Cancer and Ageing Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, UK.,Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, UK.,Medical College, Henan University of Science and Technology, Luoyang, China
| | - Chloé Peubez
- Mechanisms of Cancer and Ageing Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, UK.,Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, UK
| | - Victoria Smith
- Mechanisms of Cancer and Ageing Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, UK.,Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, UK
| | - Shiqiu Xiong
- Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, UK.,Department of Cancer Studies, University of Leicester, Leicester, UK
| | - Gabriella Kocsis-Fodor
- Mechanisms of Cancer and Ageing Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, UK.,Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, UK
| | - Ben Kennedy
- Department of Haematology, University Hospitals of Leicester, Leicester, UK
| | - Simon Wagner
- Department of Haematology, University Hospitals of Leicester, Leicester, UK
| | | | - Sandrine Jayne
- Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, UK.,Department of Cancer Studies, University of Leicester, Leicester, UK
| | - Martin J S Dyer
- Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, UK.,Department of Cancer Studies, University of Leicester, Leicester, UK
| | - Salvador Macip
- Mechanisms of Cancer and Ageing Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, UK.,Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, UK
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27
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Zeng J, Peng C, Wang X, Wang R, Zhang N, Xiong S. One-pot self-assembled TiO2
/graphene/poly(acrylamide) superporous hybrid for photocatalytic degradation of organic pollutants. J Appl Polym Sci 2018. [DOI: 10.1002/app.47033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- J. Zeng
- School of Materials Science and Engineering; Central South University; Changsha 410083 China
| | - C. Peng
- School of Materials Science and Engineering; Central South University; Changsha 410083 China
| | - X. Wang
- School of Materials Science and Engineering; Central South University; Changsha 410083 China
| | - R. Wang
- School of Materials Science and Engineering; Central South University; Changsha 410083 China
| | - N. Zhang
- School of Materials Science and Engineering; Central South University; Changsha 410083 China
| | - S. Xiong
- College of Chemical Engineering; Xiangtan University; Xiangtan 411105 China
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28
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Xu F, He D, Liu J, Ni Q, Lyu Y, Xiong S, Li Y. Genetic diversification of chemokine CXCL16 and its receptor CXCR6 in primates. Dev Comp Immunol 2018; 85:86-94. [PMID: 29635005 DOI: 10.1016/j.dci.2018.04.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/06/2018] [Accepted: 04/06/2018] [Indexed: 06/08/2023]
Abstract
Chemokine CXCL16 and its receptor CXCR6 are associated with a series of physiological and pathological processes in cooperative and stand-alone fashions. To shed insight into their versatile nature, we studied genetic variations of CXCL16 and CXCR6 in primates. Evolutionary analyses revealed that these genes underwent a similar evolutionary fate. Both genes experienced adaptive diversification with the phylogenetic division of cercopithecoids (Old World monkeys) and hominoids (humans, great apes, and gibbons) from their common ancestor. In contrast, they were conserved in the periods preceding and following the dividing process. In terms of the adaptive diversification between cercopithecoids and hominoids, the adaptive genetic changes have occurred in the mucin-like and chemokine domains of CXCL16 and the N-terminus and transmembrane helixes of CXCR6. In combination with currently available structural and functional information for CXCL16 and CXCR6, the parallels between the evolutionary footprints and the co-occurrence of adaptive diversification at some evolutionary stage suggest that interplay could exist between the diversification-related amino acid sites, or between the domains on which the identified sites are located, in physiological processes such as chemotaxis and/or cell adhesion.
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Affiliation(s)
- Feifei Xu
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Dan He
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Jiabin Liu
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, People's Republic of China
| | - Qingyong Ni
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Yongqing Lyu
- The First Hospital of Kunming Calmette International Hospital, People's Republic of China
| | - Shiqiu Xiong
- Cancer Research Centre, University of Leicester, United Kingdom
| | - Yan Li
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China.
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29
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Zhu Y, Yue Y, Xiong S. Administration of activated lymphocyte-derived DNA accelerates and aggravates lupus nephritis in B6/lpr mice: a new approach to modify a lupus murine model. Clin Exp Immunol 2018; 193:302-312. [PMID: 29704464 DOI: 10.1111/cei.13147] [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: 12/16/2017] [Revised: 03/30/2018] [Accepted: 04/24/2018] [Indexed: 11/30/2022] Open
Abstract
B6/lpr mouse strain is a well-known systemic lupus erythematosus murine model characterized by uncontrolled lymphoproliferation and autoantibody production. However, it displays a delayed and mild development of lupus nephritis (LN), which is not conducive to the research of the pathogenesis and therapeutic strategies of this condition. Our previous study demonstrated that activated lymphocyte-derived DNA (ALD-DNA) could induce high urine protein levels and severe glomerulonephritis (GN) in BALB/c mice. In the present study, we tried to remedy delayed urine protein production and mild GN in B6/lpr mice via ALD-DNA immunization. We found that urine protein levels were enhanced significantly in B6/lpr mice 4 weeks after ALD-DNA immunization compared with those in unactivated lymphocyte-derived (UnALD)-DNA- and phosphate-buffered saline (PBS)-treated controls. Moreover, more serious GN and glomerular immune complex were observed in ALD-DNA-immunized B6/lpr mice. We further explored the mechanism, and found that ALD-DNA immunization promoted T helper type 17 (Th17) cell enrichment remarkably, which enhanced the proportion of autoantibody-secreting plasma cells and promoted the production of anti-dsDNA autoantibodies, leading to accelerated and aggravated LN. Our data demonstrated that ALD-DNA immunization could remedy delayed urine protein production and mild GN in B6/lpr mouse, which makes it more suitable for studies on the pathogenesis of and therapeutic strategies against LN.
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Affiliation(s)
- Y Zhu
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Y Yue
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - S Xiong
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
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30
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Shi YZ, Xiong S, Zhang Y, Chin LK, Chen YY, Zhang JB, Zhang TH, Ser W, Larrson A, Lim SH, Wu JH, Chen TN, Yang ZC, Hao YL, Liedberg B, Yap PH, Wang K, Tsai DP, Qiu CW, Liu AQ. Sculpting nanoparticle dynamics for single-bacteria-level screening and direct binding-efficiency measurement. Nat Commun 2018; 9:815. [PMID: 29483548 PMCID: PMC5827716 DOI: 10.1038/s41467-018-03156-5] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 01/24/2018] [Indexed: 01/21/2023] Open
Abstract
Particle trapping and binding in optical potential wells provide a versatile platform for various biomedical applications. However, implementation systems to study multi-particle contact interactions in an optical lattice remain rare. By configuring an optofluidic lattice, we demonstrate the precise control of particle interactions and functions such as controlling aggregation and multi-hopping. The mean residence time of a single particle is found considerably reduced from 7 s, as predicted by Kramer’s theory, to 0.6 s, owing to the mechanical interactions among aggregated particles. The optofluidic lattice also enables single-bacteria-level screening of biological binding agents such as antibodies through particle-enabled bacteria hopping. The binding efficiency of antibodies could be determined directly, selectively, quantitatively and efficiently. This work enriches the fundamental mechanisms of particle kinetics and offers new possibilities for probing and utilising unprecedented biomolecule interactions at single-bacteria level. Optical trapping is a versatile tool for biomedical applications. Here, the authors use an optofluidic lattice to achieve controllable multi-particle hopping and demonstrate single-bacteria-level screening and measurement of binding efficiency of biological binding agents through particle-enabled bacteria hopping.
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Affiliation(s)
- Y Z Shi
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.,School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - S Xiong
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
| | - Y Zhang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - L K Chin
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Y -Y Chen
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - J B Zhang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - T H Zhang
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583, Singapore
| | - W Ser
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - A Larrson
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - S H Lim
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - J H Wu
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - T N Chen
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Z C Yang
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, Beijing, 100871, China
| | - Y L Hao
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, Beijing, 100871, China
| | - B Liedberg
- Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - P H Yap
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - K Wang
- College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan.,Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - D P Tsai
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - C-W Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583, Singapore. .,SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University, Shenzhen, 518060, China.
| | - A Q Liu
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore. .,National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, Beijing, 100871, China.
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Li Y, Tan G, Xiong S, Zhang B, Chen W, Yang J, Li H. Transketolase contributes to hepatocellular carcinoma migration, invasion, angiogenesis, and tumorigenesis. Transl Cancer Res 2018. [DOI: 10.21037/tcr.2017.10.26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Tang H, Wang Y, Zhang B, Xiong S, Liu L, Chen W, Tan G, Li H. High brain acid soluble protein 1(BASP1) is a poor prognostic factor for cervical cancer and promotes tumor growth. Cancer Cell Int 2017; 17:97. [PMID: 29089860 PMCID: PMC5655910 DOI: 10.1186/s12935-017-0452-4] [Citation(s) in RCA: 22] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 09/09/2017] [Indexed: 12/16/2022] Open
Abstract
Background The aim of this study was to determine whether brain abundant membrane attached signal protein 1 (BASP1) is a valuable prognostic biomarker for cervical cancer and whether BASP1 regulates the progression of cervical cancer. Methods Quantitative real-time PCR, western blotting, and immunohistochemistry were used to determined BASP1 levels. Statistical analyses were used to examine whether BASP1 was a prognostic factor for patients with cervical cancer. The MTT assay, colony formation assay, cell cycle assay, anchorage-independent growth assay, and a tumor xenograft model were used to determine the role of BASP1 in the proliferation and tumorigenicity of cervical cancer. Results Brain abundant membrane attached signal protein 1 was upregulated in cervical cancer tissues and cells, and BASP1 expression levels were higher in patients that had died during follow-up compared with those that survived. There was a positive correlation between BASP1 expression and clinical stage (p < 0.001), T classification (p < 0.001), N classification (p < 0.05), and survival or mortality (p < 0.05). Patients with higher BASP1 expression had a shorter overall survival time. Cox regression analysis shown BSAP1 was an unfavorable prognostic factor for patients with cervical cancer. Overexpression of BASP1 promoted the proliferation of cervical cancer and its colony formation ability, accelerated cell cycle progression, and enhanced tumorgenicity. BASP1 knockdown inhibited the proliferation of cervical cancer and its colony formation ability, suppressed cell cycle progression, and decreased tumorgenicity. Conclusions The results showed that BASP1 not only is a novel prognostic factor for patients with cervical cancer, but also promotes the proliferation and tumorigenicity of cervical cancer. Electronic supplementary material The online version of this article (doi:10.1186/s12935-017-0452-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Huiru Tang
- Department of Gynecology & Obstetrics, Peking University Shenzhen Hospital, Shenzhen, 518036 People's Republic of China.,Shenzhen Key Laboratory of Gynecological Diagnostic Technology Research, Shenzhen, 518036 People's Republic of China
| | - Yan Wang
- Department of Gynecology and Obstetrics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515 People's Republic of China
| | - Bing Zhang
- Department of Nuclear Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080 People's Republic of China
| | - Shiqiu Xiong
- Department of Biochemistry, University of Leicester, Leicester, LE1 7RH UK
| | - Liangshuai Liu
- Department of Interventional Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080 People's Republic of China
| | - Wei Chen
- Department of Interventional Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080 People's Republic of China
| | - Guosheng Tan
- Department of Interventional Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080 People's Republic of China.,Department of Medical Oncology, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Yuexiu District, Guangzhou, 510080 People's Republic of China
| | - Heping Li
- Department of Interventional Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080 People's Republic of China.,Department of Medical Oncology, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Yuexiu District, Guangzhou, 510080 People's Republic of China
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Bridges JC, Clemmet J, Croon M, Sims MR, Pullan D, Muller JP, Tao Y, Xiong S, Putri AR, Parker T, Turner SMR, Pillinger JM. Identification of the Beagle 2 lander on Mars. R Soc Open Sci 2017; 4:170785. [PMID: 29134081 PMCID: PMC5666264 DOI: 10.1098/rsos.170785] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 09/13/2017] [Indexed: 06/07/2023]
Abstract
The 2003 Beagle 2 Mars lander has been identified in Isidis Planitia at 90.43° E, 11.53° N, close to the predicted target of 90.50° E, 11.53° N. Beagle 2 was an exobiology lander designed to look for isotopic and compositional signs of life on Mars, as part of the European Space Agency Mars Express (MEX) mission. The 2004 recalculation of the original landing ellipse from a 3-sigma major axis from 174 km to 57 km, and the acquisition of Mars Reconnaissance Orbiter High Resolution Imaging Science Experiment (HiRISE) imagery at 30 cm per pixel across the target region, led to the initial identification of the lander in 2014. Following this, more HiRISE images, giving a total of 15, including red and blue-green colours, were obtained over the area of interest and searched, which allowed sub-pixel imaging using super high-resolution techniques. The size (approx. 1.5 m), distinctive multilobed shape, high reflectivity relative to the local terrain, specular reflections, and location close to the centre of the planned landing ellipse led to the identification of the Beagle 2 lander. The shape of the imaged lander, although to some extent masked by the specular reflections in the various images, is consistent with deployment of the lander lid and then some or all solar panels. Failure to fully deploy the panels-which may have been caused by damage during landing-would have prohibited communication between the lander and MEX and commencement of science operations. This implies that the main part of the entry, descent and landing sequence, the ejection from MEX, atmospheric entry and parachute deployment, and landing worked as planned with perhaps only the final full panel deployment failing.
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Affiliation(s)
- J. C. Bridges
- Leicester Institute for Space and Earth Observation, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
| | - J. Clemmet
- Airbus, Gunnels Wood Road, Stevenage SG1 2AS, UK
| | | | - M. R. Sims
- Leicester Institute for Space and Earth Observation, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
| | - D. Pullan
- Leicester Institute for Space and Earth Observation, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
| | - J.-P. Muller
- Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Holmbury St Mary RH5 6NT, UK
| | - Y. Tao
- Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Holmbury St Mary RH5 6NT, UK
| | - S. Xiong
- Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Holmbury St Mary RH5 6NT, UK
| | - A. R. Putri
- Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Holmbury St Mary RH5 6NT, UK
| | - T. Parker
- Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - S. M. R. Turner
- Leicester Institute for Space and Earth Observation, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
| | - J. M. Pillinger
- School of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
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34
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Ding Y, Sun C, Li J, Hu L, Li M, Liu J, Pu L, Xiong S. The Prognostic Significance of Soluble Programmed Death Ligand 1 Expression in Cancers: A Systematic Review and Meta-analysis. Scand J Immunol 2017; 86:361-367. [PMID: 28930374 DOI: 10.1111/sji.12596] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 08/12/2017] [Indexed: 12/28/2022]
Abstract
The differential expression of soluble programmed death ligand 1 (sPD-L1) has been found in some cancers; however, the correlation between sPD-L1 expression and prognosis value in tumour is still unclear. Here, we conducted a meta-analysis and systematic review to assess the prognostic value of sPD-L1 in patients with cancer. Eligible studies were searched for in the databases including PubMed, Web of Science, ScienceDirect and Wiley Online Library database. The pooled hazard ratios (HRs) with a 95% confidence interval (95%CI) were calculated to assess the prognostic significance of sPD-L1 in human cancer. Eight studies and 1102 patients with cancer were included in the final analysis, and the combined analysis indicated that a higher level of sPD-L1 was associated with worse overall survival (OS) (HR = 1.60, 95%CI: 1.21-1.99). Furthermore, statistical significance was also observed in subgroup analysis stratified by the cancer type (haematological neoplasms or non-haematological neoplasms), sample size (more or less than 100), cut-off value of sPD-L1 (more or less than 6.51 ng/ml) and ethnicity (Asian or European). The meta-analysis indicates that circulating sPD-L1 changes may serve as a useful biomarker for cancer prognosis, and higher level of sPD-L1 may also be associated with poor outcomes in patients with cancer.
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Affiliation(s)
- Y Ding
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - C Sun
- Department of Pharmacology, The Second Hospital of Anhui Medical university, Hefei, Anhui, China
| | - J Li
- Department of Emergency, The Second Hospital of Anhui Medical university, Hefei, Anhui, China
| | - L Hu
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - M Li
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - J Liu
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - L Pu
- Department of Hematology, The Third People's Hospital of Bengbu, Bengbu, Anhui, China
| | - S Xiong
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
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35
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Shi YZ, Xiong S, Chin LK, Yang Y, Zhang JB, Ser W, Wu JH, Chen TN, Yang ZC, Hao YL, Liedberg B, Yap PH, Zhang Y, Liu AQ. High-resolution and multi-range particle separation by microscopic vibration in an optofluidic chip. Lab Chip 2017. [PMID: 28634603 DOI: 10.1039/c7lc00484b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
An optofluidic chip is demonstrated in experiments for high-resolution and multi-range particle separation through the optically-induced microscopic vibration effect, where nanoparticles are trapped in loosely overdamped optical potential wells created with combined optical and fluidic constraints. It is the first demonstration of separating single nanoparticles with diameters ranging from 60 to 100 nm with a resolution of 10 nm. Nanoparticles vibrate with an amplitude of 3-7 μm in the loosely overdamped potential wells in the microchannel. The proposed optofluidic device is capable of high-resolution particle separation at both nanoscale and microscale without reconfiguring the device. The separation of bacteria from other larger cells is accomplished using the same chip and operation conditions. The unique trapping mechanism and the superb performance in high-resolution and multi-range particle separation of the proposed optofluidic chip promise great potential for a diverse range of biomedical applications.
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Affiliation(s)
- Y Z Shi
- School of Mechanical Engineering, Xi'an Jiao Tong University, Xian 710049, China
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Liu S, Liu L, Tang Y, Xiong S, Long J, Liu Z, Tian N. Comparative transcriptomic analysis of key genes involved in flavonoid biosynthetic pathway and identification of a flavonol synthase from Artemisia annua L. Plant Biol (Stuttg) 2017; 19:618-629. [PMID: 28267260 DOI: 10.1111/plb.12562] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 10/13/2016] [Accepted: 03/01/2017] [Indexed: 06/06/2023]
Abstract
The regulatory mechanism of flavonoids, which synergise anti-malarial and anti-cancer compounds in Artemisia annua, is still unclear. In this study, an anthocyanidin-accumulating mutant callus was induced from A. annua and comparative transcriptomic analysis of wild-type and mutant calli performed, based on the next-generation Illumina/Solexa sequencing platform and de novo assembly. A total of 82,393 unigenes were obtained and 34,764 unigenes were annotated in the public database. Among these, 87 unigenes were assigned to 14 structural genes involved in the flavonoid biosynthetic pathway and 37 unigenes were assigned to 17 structural genes related to metabolism of flavonoids. More than 30 unigenes were assigned to regulatory genes, including R2R3-MYB, bHLH and WD40, which might regulate flavonoid biosynthesis. A further 29 unigenes encoding flavonoid biosynthetic enzymes or transcription factors were up-regulated in the mutant, while 19 unigenes were down-regulated, compared with the wild type. Expression levels of nine genes involved in the flavonoid pathway were compared using semi-quantitative RT-PCR, and results were consistent with comparative transcriptomic analysis. Finally, a putative flavonol synthase gene (AaFLS1) was identified from enzyme assay in vitro and in vivo through heterogeneous expression, and confirmed comparative transcriptomic analysis of wild-type and mutant callus. The present work has provided important target genes for the regulation of flavonoid biosynthesis in A. annua.
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Affiliation(s)
- S Liu
- Hunan Collaborative Innovation for Utilization of Botanical Functional Ingredients, National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, College of Horticulture and Hardening, Hunan Agricultural University, Changsha, China
- Department of Tea Science, College of Horticulture and Hardening, Hunan Agricultural University, Changsha, China
| | - L Liu
- Department of Tea Science, College of Horticulture and Hardening, Hunan Agricultural University, Changsha, China
| | - Y Tang
- Department of Tea Science, College of Horticulture and Hardening, Hunan Agricultural University, Changsha, China
| | - S Xiong
- Department of Tea Science, College of Horticulture and Hardening, Hunan Agricultural University, Changsha, China
| | - J Long
- Hunan Collaborative Innovation for Utilization of Botanical Functional Ingredients, National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, College of Horticulture and Hardening, Hunan Agricultural University, Changsha, China
| | - Z Liu
- Hunan Collaborative Innovation for Utilization of Botanical Functional Ingredients, National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, College of Horticulture and Hardening, Hunan Agricultural University, Changsha, China
- Department of Tea Science, College of Horticulture and Hardening, Hunan Agricultural University, Changsha, China
| | - N Tian
- Department of Tea Science, College of Horticulture and Hardening, Hunan Agricultural University, Changsha, China
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Xiong S, Guo L. EXERGAME TECHNOLOGY AND INTERACTIVE INTERVENTIONS FOR ELDERLY FALL PREVENTION: A LITERATURE REVIEW. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Xiong
- Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea (the Republic of),
| | - L. Guo
- Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea (the Republic of),
- China University of Geosciences, Wuhan, China
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38
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Bajwa R, Bishnoi R, Franke A, Skeleton W, Patel N, Slayton W, Zou F, Xiong S, Dang N. PTLD: Survival and analysis of prognostic factors in a cohort of 138 patients from a single institution. Hematol Oncol 2017. [DOI: 10.1002/hon.2439_98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- R. Bajwa
- Hematology/Oncology; University of Florida; Gainesville USA
| | - R. Bishnoi
- Internal Medicine; University of Florida; Gainesville USA
| | - A. Franke
- Internal Medicine; University of Florida; Gainesville USA
| | - W. Skeleton
- Internal Medicine; University of Florida; Gainesville USA
| | - N. Patel
- Internal Medicine; University of Florida; Gainesville USA
| | - W. Slayton
- Pediatric Hematology/Oncology; University of Florida; Gainesville USA
| | - F. Zou
- Biostatistics; University of Florida; Gainesville USA
| | - S. Xiong
- Biostatistics; University of Florida; Gainesville USA
| | - N. Dang
- Hematology/Oncology; University of Florida; Gainesville USA
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39
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Li Q, Wang HQ, Chen YQ, Xiong S, Zeng L. [Study of long non-coding RNA HOTAIR expression in middle ear cholesteatoma]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:250-253. [PMID: 29871236 DOI: 10.13201/j.issn.1001-1781.2017.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Indexed: 11/12/2022]
Abstract
Objective:To discuss the different expression of some long-chain noncoding RNA between middle ear cholesteatoma epithelial tissue and normal external ear canal skin.Method:Real-time quantitative PCR was used to detect the expression of 6 kinds of lncRNA: HOTAIR, ANCR, TINCR, PRINS, BANCR, PICSAR in 25 cases of cholesteatoma epithelial tissues and 15 cases of normal external auditory canal skin tissue samples, respectively. And compared the expression level of lncRNA in patients with different degree of bone destruction.Result:Expression level of HOTAIR was significantly increased in cholesteatoma epithelial tissues compared with the normal external auditory canal skin tissues,and the difference is statistically significant (P< 0.01). While there was no statistically significant difference expression of the rest of the five kinds of lncRNA between middle ear cholesteatoma epithelial tissues and normal external ear canal skin (P> 0.05). And there was no statistically significant difference expression of HOTAIR in patients with different degree of bone destruction (P> 0.05).Conclusion:Expression level of HOTAIR was up-regulated in middle ear cholesteatoma epithelial tissue compared with the normal external auditory canal skin tissues, and the expression level of HOTAIR has no obvious correlation with degree of bone destruction in patients with cholesteatoma.
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Affiliation(s)
- Q Li
- Department of Otolaryngology Head and Neck Surgery, the First Affiliated Hospital of Nanchang University
| | - H Q Wang
- Department of Otolaryngology Head and Neck Surgery, the First Affiliated Hospital of Nanchang University
| | - Y Q Chen
- Department of Otolaryngology Head and Neck Surgery, the First Affiliated Hospital of Nanchang University
| | - S Xiong
- Department of Otolaryngology Head and Neck Surgery, the First Affiliated Hospital of Nanchang University
| | - L Zeng
- Department of Otolaryngology Head and Neck Surgery, the First Affiliated Hospital of Nanchang University
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40
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He W, Wu Y, Tang X, Xia Y, He G, Min Z, Li C, Xiong S, Shi Z, Lu Y, Yuan Z. HDAC inhibitors suppress c-Jun/Fra-1-mediated proliferation through transcriptionally downregulating MKK7 and Raf1 in neuroblastoma cells. Oncotarget 2017; 7:6727-47. [PMID: 26734995 PMCID: PMC4872745 DOI: 10.18632/oncotarget.6797] [Citation(s) in RCA: 21] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Accepted: 12/23/2015] [Indexed: 12/19/2022] Open
Abstract
Activator protein 1 (AP-1) is a transcriptional factor composed of the dimeric members of bZIP proteins, which are frequently deregulated in human cancer cells. In this study, we aimed to identify an oncogenic AP-1 dimer critical for the proliferation of neuroblastoma cells and to investigate whether histone deacetylase inhibitors (HDACIs), a new generation of anticancer agents, could target the AP-1 dimer. We report here that HDACIs including trichostatin A, suberoylanilidehydroxamic acid, valproic acid and M344 can transcriptionally suppress both c-Jun and Fra-1, preceding their inhibition of cell growth. c-Jun preferentially interacting with Fra-1 as a heterodimer is responsible for AP-1 activity and critical for cell growth. Mechanistically, HDACIs suppress Fra-1 expression through transcriptionally downregulating Raf1 and subsequently decreasing MEK1/2-ERK1/2 activity. Unexpectedly, HDACI treatment caused MKK7 downregulation at both the protein and mRNA levels. Deletion analysis of the 5′-flanking sequence of the MKK7 gene revealed that a major element responsible for the downregulation by HDACI is located at −149 to −3 relative to the transcriptional start site. Knockdown of MKK7 but not MKK4 remarkably decreased JNK/c-Jun activity and proliferation, whereas ectopic MKK7-JNK1 reversed HDACI-induced c-Jun suppression. Furthermore, suppression of both MKK-7/c-Jun and Raf-1/Fra-1 activities was involved in the tumor growth inhibitory effects induced by SAHA in SH-SY5Y xenograft mice. Collectively, these findings demonstrated that c-Jun/Fra-1 dimer is critical for neuroblastoma cell growth and that HDACIs act as effective suppressors of the two oncogenes through transcriptionally downregulating MKK7 and Raf1.
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Affiliation(s)
- Weiwen He
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou Medical University, Guangzhou, China
| | - Yanna Wu
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou Medical University, Guangzhou, China
| | - Xiaomei Tang
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou Medical University, Guangzhou, China
| | - Yong Xia
- Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou Medical University, Guangzhou, China
| | - Guozhen He
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou Medical University, Guangzhou, China
| | - Zhiqun Min
- Clinical Laboratory Center of Molecular Medicine, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Chun Li
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou Medical University, Guangzhou, China
| | - Shiqiu Xiong
- Department of Biochemistry, University of Leicester, Leicester, UK
| | - Zhi Shi
- Department of Cell Biology and Institute of Biomedicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Yongjian Lu
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou Medical University, Guangzhou, China
| | - Zhongmin Yuan
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou Medical University, Guangzhou, China
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Xiong S, Li J, Mu Y, Zhu X, Wang X, Zhang Z. The Effects of Gender and Multiple Oral Dosing on the Pharmacokinetics and Bioavailability of Morroniside in Beagle Dogs: A Pilot Study. Indian J Pharm Sci 2017. [DOI: 10.4172/pharmaceutical-sciences.1000229] [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: 11/09/2022] Open
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Kennedy PR, Chazara O, Gardner L, Ivarsson MA, Farrell LE, Xiong S, Hiby SE, Colucci F, Sharkey AM, Moffett A. Activating KIR2DS4 Is Expressed by Uterine NK Cells and Contributes to Successful Pregnancy. J Immunol 2016; 197:4292-4300. [PMID: 27815424 PMCID: PMC5114884 DOI: 10.4049/jimmunol.1601279] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 09/28/2016] [Indexed: 11/19/2022]
Abstract
Tissue-specific NK cells are abundant in the pregnant uterus and interact with invading placental trophoblast cells that transform the maternal arteries to increase the fetoplacental blood supply. Genetic case-control studies have implicated killer cell Ig-like receptor (KIR) genes and their HLA ligands in pregnancy disorders characterized by failure of trophoblast arterial transformation. Activating KIR2DS1 or KIR2DS5 (when located in the centromeric region as in Africans) lower the risk of disorders when there is a fetal HLA-C allele carrying a C2 epitope. In this study, we investigated another activating KIR, KIR2DS4, and provide genetic evidence for a similar effect when carried with KIR2DS1 KIR2DS4 is expressed by ∼45% of uterine NK (uNK) cells. Similarly to KIR2DS1, triggering of KIR2DS4 on uNK cells led to secretion of GM-CSF and other chemokines, known to promote placental trophoblast invasion. Additionally, XCL1 and CCL1, identified in a screen of 120 different cytokines, were consistently secreted upon activation of KIR2DS4 on uNK cells. Inhibitory KIR2DL5A, carried in linkage disequilibrium with KIR2DS1, is expressed by peripheral blood NK cells but not by uNK cells, highlighting the unique phenotype of uNK cells compared with peripheral blood NK cells. That KIR2DS4, KIR2DS1, and some alleles of KIR2DS5 contribute to successful pregnancy suggests that activation of uNK cells by KIR binding to HLA-C is a generic mechanism promoting trophoblast invasion into the decidua.
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Affiliation(s)
- Philippa R Kennedy
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; .,Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom.,Manchester Collaborative Centre for Inflammation Research, University of Manchester, Manchester M13 9NT, United Kingdom
| | - Olympe Chazara
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom.,Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom
| | - Lucy Gardner
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom.,Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom
| | - Martin A Ivarsson
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom.,Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom
| | - Lydia E Farrell
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom.,Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom
| | - Shiqiu Xiong
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom.,Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom.,Department of Molecular and Cell Biology, University of Leicester, Leicester LE1 7RH, United Kingdom; and
| | - Susan E Hiby
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom.,Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom
| | - Francesco Colucci
- Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom.,Department of Obstetrics and Gynaecology, University of Cambridge School of Clinical Medicine, National Institute for Health Research Cambridge Biomedical Research Centre, Addenbrooke's Hospital, Cambridge CB2 0SP, United Kingdom
| | - Andrew M Sharkey
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom.,Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom
| | - Ashley Moffett
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; .,Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom
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Ren J, Ocola LE, Divan R, Czaplewski DA, Segal-Peretz T, Xiong S, Kline RJ, Arges CG, Nealey PF. Post-directed-self-assembly membrane fabrication for in situ analysis of block copolymer structures. Nanotechnology 2016; 27:435303. [PMID: 27659775 DOI: 10.1088/0957-4484/27/43/435303] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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
Full characterization of the three-dimensional structures resulting from the directed self-assembly (DSA) of block copolymers (BCP) remains a difficult challenge. Transmission electron microscope (TEM) tomography and resonant soft x-ray scattering have emerged as powerful and complementary methods for through-film characterization; both techniques require samples to be prepared on specialized membrane substrates. Here we report a generalizable process to implement BCP DSA with density multiplication on silicon nitride membranes. A key feature of the process developed here is that it does not introduce any artefacts or damage to the polymer assemblies as DSA is performed prior to back-etched membrane formation. Because most research and applications of BCP lithography are based on silicon substrates, process variations introduced by implementing DSA on a silicon nitride/silicon stack versus silicon were identified and mitigated. Using full-wafers, membranes were fabricated with different sizes and layouts to enable both TEM and x-ray characterization. Finally, both techniques were used to characterize structures resulting from the DSA of lamella-forming BCP with density multiplication.
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Affiliation(s)
- J Ren
- University of Chicago, Institute for Molecular Engineering, 5640 S Ellis Ave ERC 229, Chicago, IL 60637, USA
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44
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Xiong S, Jiang HQ. [The progress of stem cells in the treatment of olfactory dysfunction]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 51:550-3. [PMID: 27480308 DOI: 10.3760/cma.j.issn.1673-0860.2016.07.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Olfactory dysfunction is one of the common diseases in the Department of Otorhinolaryngology. Although the olfactory nerve has ability to regenerate in human central nervous system, if the damage involves nerve, only a few patients can restore the olfactory function. At present, there is no satisfactory treatment for sensorineural olfactory dysfunction. Therefore, it is urgent to explore new and effective method for treating sensorineural olfactory dysfunction. The progress of stem cells in the treatment of olfactory dysfunction is reviewed in this article.
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Affiliation(s)
- S Xiong
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital, Nanchang University, Nanchang 330006, China
| | - H Q Jiang
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital, Nanchang University, Nanchang 330006, China
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45
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Zhang Y, Xiong S, Pant V, El-Naggar A, Lozano G. Abstract P3-03-03: A mouse model of sporadic breast tumor with a conditional P53 mutation. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p3-03-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Missense mutations in the tumor suppressor gene p53 are present in more than 50% of human tumors. In particular, the arginine-to-histidine mutation at codon 175 (p53R175H) has been found in more than 4% of human breast cancers. p53 mutations fall into two general categories: germline mutations that are associated with hereditary tumors, and somatic mutations that cause sporadic tumors. Mouse models for cancers induced by p53 germline mutations have been established and characterized. However, hitherto there are no accurate animal models for sporadic tumors induced by p53 somatic missense mutations, although this mechanism of inactivating p53 occurs in a large fraction of human cancers.
We have generated a mouse allele, p53WM, that carries coding sequences for both wild type (WT) and R172H mutant p53 (corresponding to R175H in humans) at the p53 endogenous locus. The coding sequence for WT p53 is flanked by loxP sites and therefore can be deleted by Cre recombinase. In the absence of Cre, following radiation, the p53WM/+ mice have the similar ability as the p53 WT mice to activate p53, as demonstrated by transcriptional activation of p53 targets and induction of apoptosis. In addition, like WT mouse embryonic fibroblasts (MEFs), the p53WM/+ MEFs also underwent cell cycle arrest following radiation. After crossing p53WM/+ mice with Zp3-Cre mice which express the Cre recombinase in oocytes, the coding sequence for WT p53 was removed, and the mutant p53R172H allele was regenerated as determined by sequencing, western blot analysis and real time reverse transcription PCR.
To investigate whether a somatic p53R172H mutation in mammary epithelium can induce breast tumors, adenoviruses expressing Cre (Ad-Cre) were injected into the mammary duct of p53WM/+ mice. Limiting the adenovirus dose allowed us to induce the p53R172H mutation in 1 of 20, 100 or 1000 cells, generating a mutant p53 surrounded by normal cells which more accurately mimics the clinical situation of sporadic tumors. Meanwhile, p53WM/+; K14-Cre and p53WM/+; WAP-Cre mice have been generated, in which p53R172H mutation are induced through Cre transgene specifically in the mammary epithelial cells. Lastly, to examine how somatic p53 mutation cooperates with an oncogene in mammary tumor induction, MMTV-neu; p53WM/+ mice were also subjected to the mammary intraductal Ad-Cre injection. We are currently monitoring mice and will further investigate the molecular mechanisms of tumorigenesis by studying the loss of heterozygosity, and the co-evolution of tumor epithelial cells and their microenvironment. This mouse model is more likely to share the underlying molecular pathology with human sporadic tumors. Therefore, it will be more predictive of human responses to drugs, and thus a more valuable tool in preclinical testing.
Citation Format: Zhang Y, Xiong S, Pant V, El-Naggar A, Lozano G. A mouse model of sporadic breast tumor with a conditional P53 mutation. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P3-03-03.
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Affiliation(s)
- Y Zhang
- UT MD Anderson Cancer Center, Houston, TX
| | - S Xiong
- UT MD Anderson Cancer Center, Houston, TX
| | - V Pant
- UT MD Anderson Cancer Center, Houston, TX
| | | | - G Lozano
- UT MD Anderson Cancer Center, Houston, TX
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Sharkey AM, Xiong S, Kennedy PR, Gardner L, Farrell LE, Chazara O, Ivarsson MA, Hiby SE, Colucci F, Moffett A. Tissue-Specific Education of Decidual NK Cells. J Immunol 2015; 195:3026-32. [PMID: 26320253 PMCID: PMC4574523 DOI: 10.4049/jimmunol.1501229] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 07/28/2015] [Indexed: 01/03/2023]
Abstract
During human pregnancy, fetal trophoblast cells invade the decidua and remodel maternal spiral arteries to establish adequate nutrition during gestation. Tissue NK cells in the decidua (dNK) express inhibitory NK receptors (iNKR) that recognize allogeneic HLA-C molecules on trophoblast. Where this results in excessive dNK inhibition, the risk of pre-eclampsia or growth restriction is increased. However, the role of maternal, self-HLA-C in regulating dNK responsiveness is unknown. We investigated how the expression and function of five iNKR in dNK is influenced by maternal HLA-C. In dNK isolated from women who have HLA-C alleles that carry a C2 epitope, there is decreased expression frequency of the cognate receptor, KIR2DL1. In contrast, women with HLA-C alleles bearing a C1 epitope have increased frequency of the corresponding receptor, KIR2DL3. Maternal HLA-C had no significant effect on KIR2DL1 or KIR2DL3 in peripheral blood NK cells (pbNK). This resulted in a very different KIR repertoire for dNK capable of binding C1 or C2 epitopes compared with pbNK. We also show that, although maternal KIR2DL1 binding to C2 epitope educates dNK cells to acquire functional competence, the effects of other iNKR on dNK responsiveness are quite different from those in pbNK. This provides a basis for understanding how dNK responses to allogeneic trophoblast affect the outcome of pregnancy. Our findings suggest that the mechanisms that determine the repertoire of iNKR and the effect of self-MHC on NK education may differ in tissue NK cells compared with pbNK.
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Affiliation(s)
- Andrew M Sharkey
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and
| | - Shiqiu Xiong
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and
| | - Philippa R Kennedy
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and
| | - Lucy Gardner
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and
| | - Lydia E Farrell
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and
| | - Olympe Chazara
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and
| | - Martin A Ivarsson
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and
| | - Susan E Hiby
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and
| | - Francesco Colucci
- Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and Department of Obstetrics and Gynaecology, University of Cambridge, Cambridge CB2 0SW, United Kingdom
| | - Ashley Moffett
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom; Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 1QP, United Kingdom; and
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47
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Zhong L, Hu J, Shu W, Gao B, Xiong S. Epigallocatechin-3-gallate opposes HBV-induced incomplete autophagy by enhancing lysosomal acidification, which is unfavorable for HBV replication. Cell Death Dis 2015; 6:e1770. [PMID: 25996297 PMCID: PMC4669713 DOI: 10.1038/cddis.2015.136] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 04/15/2015] [Accepted: 04/16/2015] [Indexed: 02/06/2023]
Abstract
Epigallocatechin-3-gallate (EGCG), a major polyphenol in green tea, exhibits diverse beneficial properties, including antiviral activity. Autophagy is a cellular process that is involved in the degradation of long-lived proteins and damaged organelles. Recent evidence indicates that modulation of autophagy is a potential therapeutic strategy for various viral diseases. In the present study, we investigated the effect of EGCG on hepatitis B virus (HBV) replication and the possible involvement of autophagy in this process. Our results showed that HBV induced autophagosome formation, which was required for replication of itself. However, although EGCG efficiently inhibited HBV replication, it enhanced, but not inhibited, autophagosome formation in hepatoma cells. Further study showed that HBV induced an incomplete autophagy, while EGCG, similar to starvation, was able to induce a complete autophagic process, which appeared to be unfavorable for HBV replication. Furthermore, it was found that HBV induced an incomplete autophagy by impairing lysosomal acidification, while it lost this ability in the presence of EGCG. Taken together, these data demonstrated that EGCG treatment opposed HBV-induced incomplete autophagy via enhancing lysosomal acidification, which was unfavorable for HBV replication.
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Affiliation(s)
- L Zhong
- Institute for Immunobiology, Department of Immunology, Shanghai Medical College of Fudan University, Shanghai 200032, P.R. China
| | - J Hu
- Institute for Immunobiology, Department of Immunology, Shanghai Medical College of Fudan University, Shanghai 200032, P.R. China
| | - W Shu
- Institute for Immunobiology, Department of Immunology, Shanghai Medical College of Fudan University, Shanghai 200032, P.R. China
| | - B Gao
- Institute for Immunobiology, Department of Immunology, Shanghai Medical College of Fudan University, Shanghai 200032, P.R. China
| | - S Xiong
- Institute for Immunobiology, Department of Immunology, Shanghai Medical College of Fudan University, Shanghai 200032, P.R. China
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou 215006, P.R. China
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Abstract
In this paper, for the first time, the tensile strength of water is directly measured using an optofluidic chip based on the displacement of air-water interface deformation with homogeneous nucleation. When water in a microchannel is stretched dynamically via laser-induced shock reflection at the air-water interface, the shock pressures are determined by measuring the displacements of the deformed interface. Observation of the vapor bubbles is used as a probe to identify the cavitation threshold with a critical distance, and the tensile strength of water at 20 °C is measured to be -33.3 ± 2.8 MPa. This method can be extended to investigate the tensile strength of other soft materials such as glycerol, which is measured to be -59.8 ± 10.7 MPa at 20 °C.
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Affiliation(s)
- Z G Li
- School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798.
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Mancini F, Pieroni L, Monteleone V, Lucà R, Fici L, Luca E, Urbani A, Xiong S, Soddu S, Masetti R, Lozano G, Pontecorvi A, Moretti F. MDM4/HIPK2/p53 cytoplasmic assembly uncovers coordinated repression of molecules with anti-apoptotic activity during early DNA damage response. Oncogene 2015; 35:228-40. [PMID: 25961923 PMCID: PMC4717155 DOI: 10.1038/onc.2015.76] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 02/02/2015] [Accepted: 02/18/2015] [Indexed: 12/14/2022]
Abstract
The p53 inhibitor, MDM4 (MDMX) is a cytoplasmic protein with p53-activating function under DNA damage conditions. Particularly, MDM4 promotes phosphorylation of p53 at Ser46, a modification that precedes different p53 activities. We investigated the mechanism by which MDM4 promotes this p53 modification and its consequences in untransformed mammary epithelial cells and tissues. In response to severe DNA damage, MDM4 stimulates p53Ser46P by binding and stabilizing serine–threonine kinase HIPK2. Under these conditions, the p53-inhibitory complex, MDM4/MDM2, dissociates and this allows MDM4 to promote p53/HIPK2 functional interaction. Comparative proteomic analysis of DNA damage-treated cells versus -untreated cells evidenced a diffuse downregulation of proteins with anti-apoptotic activity, some of which were targets of p53Ser46P/HIPK2 repressive activity. Importantly, MDM4 depletion abolishes the downregulation of these proteins indicating the requirement of MDM4 to promote p53-mediated transcriptional repression. Consistently, MDM4-mediated HIPK2/p53 activation precedes HIPK2/p53 nuclear translocation and activity. Noteworthy, repression of these proteins was evident also in mammary glands of mice subjected to γ-irradiation and was significantly enhanced in transgenic mice overexpressing MDM4. This study evidences the flexibility of MDM2/MDM4 heterodimer, which allows the development of a positive activity of cytoplasmic MDM4 towards p53-mediated transcriptional function. Noteworthy, this activity uncovers coordinated repression of molecules with shared anti-apoptotic function which precedes active cell apoptosis and that are frequently overexpressed and/or markers of tumour phenotype in human cancer.
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Affiliation(s)
- F Mancini
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy.,Department of Endocrinology and Metabolism, Catholic University of Roma, Roma, Italy
| | - L Pieroni
- Proteomic and Metabolomic Laboratory, Fondazione Santa Lucia, Roma, Italy.,Department of Experimental Medicine and Surgery, University of Roma 'Tor Vergata', Roma, Italy
| | - V Monteleone
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy
| | - R Lucà
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy
| | - L Fici
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy.,Department of Obstetrics and Gynaecology, Catholic University of Roma, Roma, Italy
| | - E Luca
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy.,Department of Endocrinology and Metabolism, Catholic University of Roma, Roma, Italy
| | - A Urbani
- Proteomic and Metabolomic Laboratory, Fondazione Santa Lucia, Roma, Italy.,Department of Experimental Medicine and Surgery, University of Roma 'Tor Vergata', Roma, Italy
| | - S Xiong
- Department of Genetics, M.D. Anderson Cancer Center, Houston, TX, USA
| | - S Soddu
- Regina Elena National Cancer Institute, Roma, Italy
| | - R Masetti
- Department of Obstetrics and Gynaecology, Catholic University of Roma, Roma, Italy
| | - G Lozano
- Department of Genetics, M.D. Anderson Cancer Center, Houston, TX, USA
| | - A Pontecorvi
- Department of Endocrinology and Metabolism, Catholic University of Roma, Roma, Italy
| | - F Moretti
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Roma, Italy
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50
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Xing S, Zhang B, Hua R, Tai WCS, Zeng Z, Xie B, Huang C, Xue J, Xiong S, Yang J, Liu S, Li H. URG4/URGCP enhances the angiogenic capacity of human hepatocellular carcinoma cells in vitro via activation of the NF-κB signaling pathway. BMC Cancer 2015; 15:368. [PMID: 25947641 PMCID: PMC4437676 DOI: 10.1186/s12885-015-1378-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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: 11/23/2014] [Accepted: 04/27/2015] [Indexed: 01/12/2023] Open
Abstract
Background Angiogenesis is essential for tumor growth. Hepatocellular carcinoma (HCC) is characterized by hypervascularity; high levels of angiogenesis are associated with poor prognosis and a highly invasive phenotype in HCC. Up-regulated gene-4 (URG4), also known as upregulator of cell proliferation (URGCP), is overexpressed in multiple tumor types and has been suggested to act as an oncogene. This study aimed to elucidate the effect of URG4/URGCP on the angiogenic capacity of HCC cells in vitro. Methods Expression of URG4/URGCP in HCC cell lines and normal liver epithelial cell lines was examined by Western blotting and quantitative real-time PCR. URG4/URGCP was stably overexpressed or transiently knocked down using a shRNA in two HCC cell lines. The human umbilical vein endothelial cell (HUVEC) tubule formation and Transwell migration assays and chicken chorioallantoic membrane (CAM) assay were used to examine the angiogenic capacity of conditioned media from URG4/URGCP-overexpressing and knockdown cells. A luciferase reporter assay was used to examine the transcriptional activity of nuclear factor kappa – light – chain - enhancer of activated B cells (NF-κB). NF-κB was inhibited by overexpressing degradation-resistant mutant inhibitor of κB (IκB)-α. Expression of vascular endothelial growth factor C (VEGFC), tumor necrosis factor-α (TNFα), interleukin (IL)-6, IL-8 and v-myc avian myelocytomatosis viral oncogene homolog (MYC) were examined by quantitative real-time PCR; VEGFC protein expression was analyzed using an ELISA. Results URG4/URGCP protein and mRNA expression were significantly upregulated in HCC cell lines. Overexpressing URG4/URGCP enhanced - while silencing URG4/URGCP decreased - the capacity of HCC cell conditioned media to induce HUVEC tubule formation and migration and neovascularization in the CAM assay. Furthermore, overexpressing URG4/URGCP increased - whereas knockdown of URG4/URGCP decreased - VEGFC expression, NF-κB transcriptional activity, the levels of phosphorylated (but not total) IκB kinase (IKK) and IκB-α, and expression of TNFα, IL-6, IL-8 and MYC in HCC cells. Additionally, inhibition of NF-κB activity in HCC cells abrogated URG4/URGCP-induced NF-κB activation and angiogenic capacity. Conclusions This study suggests that URG4/URGCP plays an important pro-angiogenic role in HCC via a mechanism linked to activation of the NF-κB pathway; URG4/URGCP may represent a potential target for anti-angiogenic therapy in HCC. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1378-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sizhong Xing
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510000, P.R. China. .,Department of Gastroenterology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510000, P.R. China. .,Department of Internal Medicine, Baoan People's Hospital, Shenzhen, 518101, P.R. China.
| | - Bing Zhang
- Department of Medical Imaging, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510000, P.R. China.
| | - Ruixi Hua
- Department of Oncology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510000, P.R. China.
| | - William Chi-shing Tai
- Center for Cancer and Inflammation Research, Institute of Integrated Bioinformedicine and Translational Science, Hong Kong Baptist University, Hong Kong, S.A.R., China.
| | - Zhirong Zeng
- Department of Gastroenterology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510000, P.R. China.
| | - Binhui Xie
- Department of Hepatobiliary Surgery, the First Affiliated Hospital of Gannan Medical University, Ganzhou, 341000, P.R. China.
| | - Chenghui Huang
- Department of Internal Medicine, Baoan People's Hospital, Shenzhen, 518101, P.R. China.
| | - Jisu Xue
- Department of Internal Medicine, Baoan People's Hospital, Shenzhen, 518101, P.R. China.
| | - Shiqiu Xiong
- Department of Biochemistry, University of Leicester, Leicester, UK.
| | - Jianyong Yang
- Department of Medical Imaging, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510000, P.R. China.
| | - Side Liu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510000, P.R. China.
| | - Heping Li
- Department of Medical Imaging, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510000, P.R. China. .,Department of Oncology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510000, P.R. China.
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