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Zhan D, Li D, Yuan K, Sun Y, He L, Zhong J, Wang L. Characteristics of the pulmonary microbiota in patients with mild and severe pulmonary infection. Front Cell Infect Microbiol 2023; 13:1227581. [PMID: 37900322 PMCID: PMC10602873 DOI: 10.3389/fcimb.2023.1227581] [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: 05/23/2023] [Accepted: 09/12/2023] [Indexed: 10/31/2023] Open
Abstract
Background Lung infection is a global health problem associated with high morbidity and mortality and increasing rates of hospitalization. The correlation between pulmonary microecology and infection severity remains unclear. Therefore, the purpose of this study was to investigate the differences in lung microecology and potential biomarkers in patients with mild and severe pulmonary infection. Method Patients with pulmonary infection or suspected infection were divided into the mild group (140 cases) and the severe group (80 cases) according to pneomonia severity index (PSI) scores. Here, we used metagenomic next-generation sequencing (mNGS) to detect DNA mainly from bronchoalveolar lavage fluid (BALF) collected from patients to analyze changes in the lung microbiome of patients with different disease severity. Result We used the mNGS to analyze the pulmonary microecological composition in patients with pulmonary infection. The results of alpha diversity and beta diversity analysis showed that the microbial composition between mild and severe groups was similar on the whole. The dominant bacteria were Acinetobacter, Bacillus, Mycobacterium, Staphylococcus, and Prevotella, among others. Linear discriminant analysis effect size (LEfSe) results showed that there were significant differences in virus composition between the mild and severe patients, especially Simplexvirus and Cytomegalovirus, which were prominent in the severe group. The random forest model screened 14 kinds of pulmonary infection-related pathogens including Corynebacterium, Mycobacterium, Streptococcus, Klebsiella, and Acinetobacter. In addition, it was found that Rothia was negatively correlated with Acinetobacter, Mycobacterium, Bacillus, Enterococcus, and Klebsiella in the mild group through co-occurrence network, while no significant correlation was found in the severe group. Conclusion Here, we describe the composition and diversity of the pulmonary microbiome in patients with pulmonary infection. A significant increase in viral replication was found in the severe group, as well as a significant difference in microbial interactions between patients with mild and severe lung infections, particularly the association between the common pathogenic bacteria and Rothia. This suggests that both pathogen co-viral infection and microbial interactions may influence the course of disease. Of course, more research is needed to further explore the specific mechanisms by which microbial interactions influence disease severity.
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Affiliation(s)
- Danting Zhan
- Shenzhen Institute of Respiratory Diseases, Shenzhen People’s Hospital, Guangdong, China
| | - Dan Li
- BGI Genomics, Shenzhen, China
| | - Ke Yuan
- BGI Genomics, Shenzhen, China
| | | | | | - Jiacheng Zhong
- Shenzhen Institute of Respiratory Diseases, Shenzhen People’s Hospital, Guangdong, China
| | - Lingwei Wang
- Shenzhen Institute of Respiratory Diseases, Shenzhen People’s Hospital, Guangdong, China
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Kong X, Luo Y, Li Y, Zhan D, Mao Y, Ma J. Preoperative prediction and histological stratification of intracranial solitary fibrous tumours by machine-learning models. Clin Radiol 2023; 78:e204-e213. [PMID: 36496260 DOI: 10.1016/j.crad.2022.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 09/23/2022] [Accepted: 10/22/2022] [Indexed: 12/12/2022]
Abstract
AIM To explore the effectiveness and feasibility of machine-learning models based on magnetic resonance imaging (MRI) radiomics features in differentiating intracranial solitary fibrous tumour (ISFT) from angiomatous meningioma (AM) and stratifying ISFT histologically. MATERIALS AND METHODS This study retrospectively recruited 268 patients with a histological diagnosis of ISFT (n=120) or AM (n=148), and 116 of the ISFT patients were used for stratified analysis of histological grade. The radiomics features were extracted from axial T1-weighted imaging (WI), T2WI and contrast-enhanced T1WI sequences. All patients were assigned randomly to the training group and test group in a ratio of 7:3. The models were optimised by 10-fold cross-validation in the training group, and the independent test group was used for further testing of the models. The performances of machine-learning models based on radiomics, clinical, and fusion features in predicting and stratifying ISFT were evaluated. RESULTS ISFT and AM differed significantly in terms of age, tumour shape, enhancement pattern, and margin. There was no significant difference in the clinical characteristics between World Health Organization (WHO) grade II and WHO grade III ISFT. When used to differentiate ISFT from AM, the area under the curve (AUC) values of the machine-learning models based on radiomics, clinical, and fusion features in the test group were 0.917, 0.923 and 0.950, respectively. When used for histological stratification of ISFT, the model based on the radiomics signature achieved an AUC value of 0.786 in the test group. CONCLUSIONS Machine-learning models can contribute in the prediction and histological stratification of ISFT non-invasively, which can help clinical differential diagnosis and treatment decisions.
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Affiliation(s)
- X Kong
- Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100071, China
| | - Y Luo
- Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100071, China
| | - Y Li
- Department of Radiology, Beijing Fengtai Hospital, Beijing 100071, China
| | - D Zhan
- Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100071, China
| | - Y Mao
- Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100071, China
| | - J Ma
- Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100071, China.
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Lu K, Zhan D, Fang Y, Li L, Chen G, Chen S, Wang L. Microplastics, potential threat to patients with lung diseases. Front Toxicol 2022; 4:958414. [PMID: 36245793 PMCID: PMC9555848 DOI: 10.3389/ftox.2022.958414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 07/04/2022] [Indexed: 01/28/2023] Open
Abstract
Air pollution is one of the major risk factors for lung disease. Microplastics are a ubiquitous environmental pollutant, both indoors and in outdoor air. Microplastics have also been found in human lung tissue and sputum. However, there is a paucity of information on the effects and mechanisms of microplastics on lung disease. In this mini-review, we reviewed the possible mechanisms by which air microplastics' exposure affects lung disease and, at the same time, pointed out the limitations of current studies.
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Affiliation(s)
- Kuo Lu
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Disease, Shenzhen Key Laboratory of Respiratory Disease, The Second Clinical Medical College of Jinan University (Shenzhen People’s Hospital), Post-Doctoral Scientific Research Station of Basic Medicine, Jinan University, Guangzhou, China
| | - Danting Zhan
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Disease, Shenzhen Key Laboratory of Respiratory Disease, The Second Clinical Medical College of Jinan University (Shenzhen People’s Hospital), Post-Doctoral Scientific Research Station of Basic Medicine, Jinan University, Guangzhou, China
| | - Yingying Fang
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Disease, Shenzhen Key Laboratory of Respiratory Disease, The Second Clinical Medical College of Jinan University (Shenzhen People’s Hospital), Post-Doctoral Scientific Research Station of Basic Medicine, Jinan University, Guangzhou, China
| | - Lei Li
- Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Key Laboratory of Brain Connectom aend Manipulation, The Brain Cogntion and Brain Disease Institute (BCBDI), Shenzhen Institutes of Adavnced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shnezhen Fundamental Research Institutions, Shenzhen, China
| | - Guobing Chen
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Disease, Shenzhen Key Laboratory of Respiratory Disease, The Second Clinical Medical College of Jinan University (Shenzhen People’s Hospital), Post-Doctoral Scientific Research Station of Basic Medicine, Jinan University, Guangzhou, China,Department of Microbiology and Immunology, Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
| | - Shanze Chen
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Disease, Shenzhen Key Laboratory of Respiratory Disease, The Second Clinical Medical College of Jinan University (Shenzhen People’s Hospital), Post-Doctoral Scientific Research Station of Basic Medicine, Jinan University, Guangzhou, China,*Correspondence: Shanze Chen, ; Lingwei Wang,
| | - Lingwei Wang
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Disease, Shenzhen Key Laboratory of Respiratory Disease, The Second Clinical Medical College of Jinan University (Shenzhen People’s Hospital), Post-Doctoral Scientific Research Station of Basic Medicine, Jinan University, Guangzhou, China,*Correspondence: Shanze Chen, ; Lingwei Wang,
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Yu M, Zhong J, Bu X, Tan X, Zhan D, Hu X, Gu Y, Xu J, Zhang P, Wang L. A Rare Case of Post-Primary Tuberculosis Which Was Pathologically Diagnosed as Lipoid Pneumonia. Infect Drug Resist 2022; 15:4235-4239. [PMID: 35959148 PMCID: PMC9359815 DOI: 10.2147/idr.s367312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 07/21/2022] [Indexed: 11/23/2022] Open
Abstract
Case Presentation The patient was a middle-aged housewife who had been using the household spray for a long time, and the main symptoms were cough and sputum production. Chest CT showed lobar ground-glass opacities (GGOs) with small patchy consolidation in the right middle lobe (RML), specifically, lung tissue pathology showed a large number of foamy cells and scattered multinucleated giant cells. The patient received empirical anti-infective treatment, but no clinical improvement was observed. Laboratory tests, including smears and cultures of sputum, blood and bronchoalveolar lavage fluid (BALF), did not provide clear evidence for pathogenic microorganisms. Therefore, the presumptive diagnosis was exogenous LP (ExLP). After 28 days of prednisone treatment, her symptoms improved, but 2 months later, she presented with a worsening cough, and the GGOs had progressed into lobar consolidation. Transbronchial lung biopsy (TBLB) culture showed mycobacterium tuberculosis (MTB), and lung tissue pathology showed granulomatous inflammation. After anti-tuberculosis treatment, the consolidation in the right middle lobe was gradually absorbed, along with a considerable symptom improvement. The final diagnosis of the patient was MTB infection with an endogenous lipoid pneumonia (EnLP)-like presentation. Conclusion The current case highlights that the MTB infection should be considered when pathology shows LP accompanied by scattered multinucleated giant cells.
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Affiliation(s)
- Min Yu
- Shenzhen People’s Hospital, Shenzhen Institute of Respiratory Diseases, Shenzhen, 518055, China
- Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518055, China
| | - Jiacheng Zhong
- Shenzhen People’s Hospital, Shenzhen Institute of Respiratory Diseases, Shenzhen, 518055, China
- Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518055, China
| | - Xueyong Bu
- Department of Radiology, Shenzhen Longgang District Maternity & Child Healthcare Hospital, Shenzhen, 518172, China
| | - Xinjuan Tan
- Shenzhen People’s Hospital, Shenzhen Institute of Respiratory Diseases, Shenzhen, 518055, China
- Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518055, China
| | - Danting Zhan
- Shenzhen People’s Hospital, Shenzhen Institute of Respiratory Diseases, Shenzhen, 518055, China
- Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518055, China
| | - Xiaoyi Hu
- Shenzhen People’s Hospital, Shenzhen Institute of Respiratory Diseases, Shenzhen, 518055, China
| | - Yingying Gu
- Department of Pathology, Guangzhou Institute of Respiratory Health, Guangzhou, 510120, China
| | - Jing Xu
- Department of Pathology, Shenzhen People’s Hospital, Shenzhen, 518055, China
| | - Peize Zhang
- Department of Pulmonary Medicine & Tuberculosis, The Third People’s Hospital of Shenzhen, Shenzhen, China
| | - Lingwei Wang
- Shenzhen People’s Hospital, Shenzhen Institute of Respiratory Diseases, Shenzhen, 518055, China
- Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518055, China
- Correspondence: Lingwei Wang, Email
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Kindler J, Zhan D, Sattler ELP, Ishikawa Y, Chen X, Gallo S. Bone density in youth with prediabetes: results from the National Health and Nutrition Examination Survey, 2005-2006. Osteoporos Int 2022; 33:467-474. [PMID: 34523010 DOI: 10.1007/s00198-021-06148-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 09/03/2021] [Indexed: 10/20/2022]
Abstract
UNLABELLED Youth with type 2 diabetes might have suboptimal peak bone mass, but it is unknown whether similar effects are evident in youth with prediabetes. Results from this study suggest that diabetes-related effects on peak bone mass likely occur before disease onset, and involve the muscle-bone unit. INTRODUCTION Type 2 diabetes might adversely influence bone health around the age of peak bone mass, but it is unknown whether diabetes-related effects on areal bone mineral density (aBMD) are evident in youth with prediabetes. We compared age-related trends in aBMD and associations between lean body mass (LBM) and aBMD between children and adolescents with prediabetes vs. normal glucose regulation. METHODS Cross-sectional analysis of data from the National Health and Nutrition Examination Survey (2005-2006) in youth ages 12-20 years (49% female, 34% black) with prediabetes (n = 267) and normal glucose regulation (n = 1664). Whole body aBMD and LBM were assessed via DXA. LBM index (LBMI) and Z-scores for aBMD and LBMI were computed. RESULTS Unadjusted between-group comparisons revealed greater mean weight and LBMI Z-scores in youth with prediabetes vs. normal glucose regulation, but similar bone Z-scores between the two groups. While accounting for differences in BMI Z-score, there was a significant interaction between prediabetes status and age with respect to whole body aBMD Z-score (P < 0.05), such that children with prediabetes tended to have increased aBMD but adolescents and young adults with prediabetes tended have lower aBMD. Furthermore, the positive association between LBMI and whole body aBMD was moderated in youth with prediabetes (P < 0.001), who had slightly lower whole body aBMD for a given LBMI (P = 0.068). Lumbar spine bone measures did not differ between the two groups. CONCLUSIONS Type 2 diabetes-related threats to peak bone mass might occur prior to disease onset, therefore potentially impacting a considerable proportion of US youth.
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Affiliation(s)
- J Kindler
- Department of Nutritional Sciences, University of Georgia, 305 Sanford Drive, 279 Dawson Hall, Athens, GA, 30602, USA.
| | - D Zhan
- Department of Statistics, University of Georgia, Athens, GA, USA
| | - E L P Sattler
- Department of Nutritional Sciences, University of Georgia, 305 Sanford Drive, 279 Dawson Hall, Athens, GA, 30602, USA
- Department of Clinical and Administrative Pharmacy, University of Georgia, Athens, GA, USA
| | - Y Ishikawa
- Department of Nutritional Sciences, University of Georgia, 305 Sanford Drive, 279 Dawson Hall, Athens, GA, 30602, USA
| | - X Chen
- Department of Statistics, University of Georgia, Athens, GA, USA
| | - S Gallo
- Department of Nutritional Sciences, University of Georgia, 305 Sanford Drive, 279 Dawson Hall, Athens, GA, 30602, USA
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Wang L, Zhan D, Liu X, Yang K, Wu S, Zhang H, Yu M, Zha Y, Huang W, Li L, Chen R, Qiu C. Initial PCR Testing Negative, but Chest CT Suggesting for Viral Pneumonia Urges for Repeated Testing for COVID-19 Diagnosis. Front Mol Biosci 2021; 8:640788. [PMID: 34124143 PMCID: PMC8189476 DOI: 10.3389/fmolb.2021.640788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 04/30/2021] [Indexed: 01/19/2023] Open
Affiliation(s)
- Lingwei Wang
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.,Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Major Respiratory Diseases's Prevention and Treatment Center, Shenzhen, China
| | - Danting Zhan
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.,Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Major Respiratory Diseases's Prevention and Treatment Center, Shenzhen, China
| | - Xiaodi Liu
- Department of Infectious Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China
| | - Kai Yang
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.,Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Major Respiratory Diseases's Prevention and Treatment Center, Shenzhen, China
| | - Shipin Wu
- Department of Infectious Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China
| | - Heng Zhang
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.,Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Major Respiratory Diseases's Prevention and Treatment Center, Shenzhen, China
| | - Min Yu
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.,Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Major Respiratory Diseases's Prevention and Treatment Center, Shenzhen, China
| | - Yimin Zha
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.,Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Major Respiratory Diseases's Prevention and Treatment Center, Shenzhen, China
| | - Weibin Huang
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.,Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Major Respiratory Diseases's Prevention and Treatment Center, Shenzhen, China
| | - Lei Li
- Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Key Laboratory of Brain Connectome and Manipulation, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, China
| | - Rongchang Chen
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.,Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Major Respiratory Diseases's Prevention and Treatment Center, Shenzhen, China
| | - Chen Qiu
- The Department of Respiratory Diseases and Critic Care Unit, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.,Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Major Respiratory Diseases's Prevention and Treatment Center, Shenzhen, China
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Liu P, Zhang H, Long X, Wang W, Zhan D, Meng X, Li D, Wang L, Chen R. Management of COVID-19 patients in Fangcang shelter hospital: clinical practice and effectiveness analysis. Clin Respir J 2020; 15:280-286. [PMID: 33051994 PMCID: PMC7675548 DOI: 10.1111/crj.13293] [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] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/29/2020] [Accepted: 10/08/2020] [Indexed: 11/28/2022]
Abstract
Fangcang shelter (Cabin) hospitals were set up in order to cope with the rapid growth of confirmed cases of coronavirus disease 2019 (COVID‐19) in Wuhan, China at a time when there were insufficient beds in designated hospitals. This paper describes the layout and functioning of a typical Fangcang shelter hospital, Wuhan Dongxihu Fangcang shelter Hospital, where the author has worked, the working mechanism, experience and effectiveness. A set of patient management protocols was employed for daily practice, which included preset criteria and procedure for admission, examination, medication treatment, referral and discharge. WeChat platform with different groups was used for communication, ward round, test appointments and patient data communication. All these procedures and mechanisms of working enabled the effective management of a larger number of patients with relatively few doctors. As a result, 442 mild or moderate COVID‐19 patients in Hall C were successfully managed by a team of 40 doctors, with 246 (56%) patients were cured and discharged from the Fangcang shelter hospital while the remaining 196 (44%) patients were referred on to designated hospitals for further treatment. The reasons for referral included poor resolution in computerized tomography (CT) scan (59%), persistently positive severe acute respiratory syndrome coronavirus 2 by PCR after 9 days of admission (16%), deterioration in CT image (4%), development of dyspnoea (1%) and other (4%) or unclear reasons (16%) due to no record of reasons for referral on the document. There were no deaths and no complaints from the patients in Hall C. In summary, the Fangcang shelter hospital could be run successfully with a set of patient management protocols under conditions of limited facilities and medical staff. It was effective and safe in isolating patients, providing basic medical care and early identification of potential severe cases. This experience may provide a successful example of a working mechanism for the prevention and control of the COVID‐19 pandemic worldwide.
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Affiliation(s)
- Pei Liu
- Department of Respiratory and Critical Care Medicine, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, South University of Science and Technology), Shenzhen, China
| | - Hongmei Zhang
- Emergence Department, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, South University of Science and Technology), Shenzhen, China
| | - Xiang Long
- Department of Respiratory and Critical Care Medicine, Peking University Shenzhen Hospital, Shenzhen, China
| | - Wei Wang
- Department of Respiratory and Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Danting Zhan
- Department of Respiratory and Critical Care Medicine, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, South University of Science and Technology), Shenzhen, China
| | - Xinke Meng
- Intensive Care Unit, Shenzhen Second People's Hospital, Shenzhen, China
| | - Duoyun Li
- Department of Infectious Diseases, Huazhong University of Science and Technology Shenzhen Union Hospital (Nanshan Hospital), Shenzhen, China
| | - Lingwei Wang
- Department of Respiratory and Critical Care Medicine, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, South University of Science and Technology), Shenzhen, China
| | - Rongchang Chen
- Department of Respiratory and Critical Care Medicine, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, South University of Science and Technology), Shenzhen, China
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Li X, Kang T, Zhan D, Xie J, Guo L. Biomechanical behavior of endocrowns vs fiber post-core-crown vs cast post-core-crown for the restoration of maxillary central incisors with 1 mm and 2 mm ferrule height: A 3D static linear finite element analysis. Medicine (Baltimore) 2020; 99:e22648. [PMID: 33120754 PMCID: PMC7581096 DOI: 10.1097/md.0000000000022648] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
To analyze the stress distribution of the maxillary central incisor with oblique fracture, repaired by different methods, using 3-dimensional finite element analysis. From the biomechanical point of view, it is expected to provide a reference for clinical selection of restoration method which is more conducive to stress distribution and preservation of dental tissue as much as possible.Use cone beam CT and finite element software to establish the finite element models of the maxillary central incisor with oblique fracture, and then create models according to 5 repairing methods(A. fiber post-core-crown group; B. cast post-core-crown group; C.3 mm deep endocrown; D.4 mm deep endocrown; E.5 mm deep endocrown)after root canal treatment, and analyze the Von Mises equivalent stress and maximum principal stress distribution and peak value of each model.When the height of dentin ferrule was fixed, the value of the Von Mises equivalent stress and the maximum principal stress in residual tooth tissue: group A was the highest, and there was no significant difference in group B, C, D and E. And the stress distribution area of 5 groups were the same. In prosthodontic layer: group B was the highest, while group A was the lowest, and the stress peak slightly increased with the increase of depth in group C, D and E. And the 5 groups were with the same stress distribution area as well. In adhesive layer: group A was the highest, while group B was the lowest, and there was little difference among group C, D and E. Group A was concentrated in 1/3 of the post tip, while group B,C,D and E were concentrated in 1/3 of the post and the post tips.Complete and high enough dentin ferrule is a requirement for repairing heavily defected maxillary central incisor with fiber post-core crown and cast post-core crown. When the dentin ferrule is incomplete, the stress distribution of the endocrown is more excellent than post-core-crown. And the endocrown with a depth of 3 mm retainer may be the best repair method. As for post-core crown restoration, the cast post-core crown is more favorable for the uniform distribution of residual tooth tissue than the fiber post-core crown.
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Affiliation(s)
- Xixi Li
- Department of prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou
- Department of Stomatology, The First People's Hospital of Shuangliu District
| | - Ting Kang
- Chengdu Second People's Hospital, Chengdu
| | - Danting Zhan
- Department of prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, China
| | - Jing Xie
- Department of prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, China
| | - Ling Guo
- Department of prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, China
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Zhang H, Zhan D, Chen D, Huang W, Yu M, Li Q, Marcos PJ, Tattevin P, Wu D, Wang L. Next-generation sequencing diagnosis of severe pneumonia from fulminant psittacosis with multiple organ failure: a case report and literature review. Ann Transl Med 2020; 8:401. [PMID: 32355845 PMCID: PMC7186658 DOI: 10.21037/atm.2020.03.17] [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] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This study includes a retrospective analysis of the diagnosis and treatment of a case of severe pneumonia from fulminant psittacosis with multiple organ failure. Next-generation sequencing (NGS) of the pathogen was conducted. The purpose of this study was to summarize the clinical, laboratory, and imaging characteristics of the case and to improve understanding of the value of NGS in the diagnosis of severe community-acquired pneumonia (CAP). Fulminant psittacosis can be manifested as severe pneumonia with rapid progression, acute respiratory distress syndrome, sepsis, and multiple organ failure. Imaging shows unilateral lung consolidation, which is difficult to differentiate from CAP caused by common pathogens. The NGS technology can early detect rare pathogens, thus reducing unnecessary use of antibiotics and shortening the course of the disease.
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Affiliation(s)
- Heng Zhang
- Department of Respiratory and Critical Care Medicine, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen 518020, China
| | - Danting Zhan
- Department of Respiratory and Critical Care Medicine, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen 518020, China
| | - Dandan Chen
- Department of Respiratory and Critical Care Medicine, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen 518020, China
| | - Weibin Huang
- Department of Respiratory and Critical Care Medicine, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen 518020, China
| | - Min Yu
- Department of Respiratory and Critical Care Medicine, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen 518020, China
| | - Qiuwen Li
- Department of Respiratory and Critical Care Medicine, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen 518020, China
| | - Pedro J Marcos
- Pneumology Service, Institute of Biomedical Research of A Coruña (INIBIC), University Hospital Complex of A Coruña (CHUAC), Universidade da Coruna (UDC), A Coruña, Spain
| | - Pierre Tattevin
- Infectious Diseases and Intensive Care Unit, Pontchaillou University Hospital, Rennes, France
| | - Di Wu
- Department of Respiratory and Critical Care Medicine, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen 518020, China
| | - Lingwei Wang
- Department of Respiratory and Critical Care Medicine, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen Institute of Respiratory Diseases, Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen 518020, China
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Li JZ, Dun Y, Zhan D, He RF. [Prevalence of brucellosis in Tibet from 1964 to 2016]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:753-754. [PMID: 29996305 DOI: 10.3760/cma.j.issn.0253-9624.2018.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- J Z Li
- National Institute for Brucella and Plague Prevention and Control Tibet Provincial Center for Disease Control and Prevention, Lasa 850000, China
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11
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Zhan D, Guo L, Zheng L. Inhibition of the receptor for advanced glycation promotes proliferation and repair of human periodontal ligament fibroblasts in response to high glucose via the NF-κB signaling pathway. Arch Oral Biol 2017; 87:86-93. [PMID: 29274622 DOI: 10.1016/j.archoralbio.2017.12.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 12/11/2017] [Accepted: 12/12/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To observe if inhibition of the receptor for advanced glycation endproducts (RAGE) promotes proliferation and repair of human periodontal ligament fibroblasts (hPDLFs) stimulated by high glucose. In addition, we also discuss the effects of the NF-κB signaling pathway in relation to this process. METHODS Primary cultured hPDLFs were exposed to either low glucose (5.5 mmol/L) or high glucose (25 mmol/L), and RAGE expression was measured by Western blot analysis. Cells were cultured in high glucose with different concentrations of the RAGE inhibitor, FPS-ZM1. We measured cell proliferation using the Cell Counting Kit-8 and expression of collagen type 1 and fibronectin by real-time PCR and ELISA, respectively. The relative protein expression levels of NF-κB p65 and phosphorylated p65 were measured by Western blot analysis. RESULTS High glucose enhanced RAGE expression and suppressed cell growth. While FPS-ZM1 increased proliferation and expression of repair-related factors in high glucose, there was a concurrent decline in the phosphorylation level of NF-κB p65. CONCLUSION FPS-ZM1 rescued the proliferative capacity and repair capability of hPDLFs via the RAGE-NF-κB signaling pathway in response to high glucose.
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Affiliation(s)
- Danting Zhan
- Department of prosthodontics, The Oral Hospital Of Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Ling Guo
- Department of prosthodontics, The Oral Hospital Of Southwest Medical University, Luzhou 646000, Sichuan, China.
| | - Lige Zheng
- Department of prosthodontics, The Oral Hospital Of Southwest Medical University, Luzhou 646000, Sichuan, China
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Li Z, Song Y, Liu L, Hou N, An X, Zhan D, Li Y, Zhou L, Li P, Yu L, Xia J, Zhang Y, Wang J, Yang X. miR-199a impairs autophagy and induces cardiac hypertrophy through mTOR activation. Cell Death Differ 2015; 24:1205-1213. [PMID: 26160071 PMCID: PMC5520159 DOI: 10.1038/cdd.2015.95] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [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: 02/03/2015] [Revised: 05/22/2015] [Accepted: 06/04/2015] [Indexed: 12/18/2022] Open
Abstract
Basal autophagy is tightly regulated by transcriptional and epigenetic factors to maintain cellular homeostasis. Dysregulation of cardiac autophagy is associated with heart diseases, including cardiac hypertrophy, but the mechanism governing cardiac autophagy is rarely identified. To analyze the in vivo function of miR-199a in cardiac autophagy and cardiac hypertrophy, we generated cardiac-specific miR-199a transgenic mice and showed that overexpression of miR-199a was sufficient to inhibit cardiomyocyte autophagy and induce cardiac hypertrophy in vivo. miR-199a impaired cardiomyocyte autophagy in a cell-autonomous manner by targeting glycogen synthase kinase 3β (GSK3β)/mammalian target of rapamycin (mTOR) complex signaling. Overexpression of autophagy related gene 5 (Atg5) attenuated the hypertrophic effects of miR-199a overexpression on cardiomyocytes, and activation of autophagy using rapamycin was sufficient to restore cardiac autophagy and decrease cardiac hypertrophy in miR-199a transgenic mice. These results reveal a novel role of miR-199a as a key regulator of cardiac autophagy, suggesting that targeting miRNAs controlling autophagy as a potential therapeutic strategy for cardiac disease.
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Affiliation(s)
- Z Li
- State Key Laboratory of Proteomics, Collaborative Innovation Center for Cardiovascular Disorders, Genetic Laboratory of Development and Disease, Institute of Biotechnology, Beijing, China
| | - Y Song
- Institute of Vascular Medicine, Peking University Third Hospital and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health, Beijing, China
| | - L Liu
- State Key Laboratory of Proteomics, Collaborative Innovation Center for Cardiovascular Disorders, Genetic Laboratory of Development and Disease, Institute of Biotechnology, Beijing, China
| | - N Hou
- State Key Laboratory of Proteomics, Collaborative Innovation Center for Cardiovascular Disorders, Genetic Laboratory of Development and Disease, Institute of Biotechnology, Beijing, China
| | - X An
- Institute of Vascular Medicine, Peking University Third Hospital and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health, Beijing, China
| | - D Zhan
- The First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, China
| | - Y Li
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua University-Peking University Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - L Zhou
- MOE key laboratory of Bioinformatics and Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - P Li
- MOE key laboratory of Bioinformatics and Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - L Yu
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua University-Peking University Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - J Xia
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Y Zhang
- Institute of Vascular Medicine, Peking University Third Hospital and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health, Beijing, China
| | - J Wang
- State Key Laboratory of Proteomics, Collaborative Innovation Center for Cardiovascular Disorders, Genetic Laboratory of Development and Disease, Institute of Biotechnology, Beijing, China
| | - X Yang
- State Key Laboratory of Proteomics, Collaborative Innovation Center for Cardiovascular Disorders, Genetic Laboratory of Development and Disease, Institute of Biotechnology, Beijing, China
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Zhang X, Zhan D, Shin HY. Integrin subtype-dependent CD18 cleavage under shear and its influence on leukocyte-platelet binding. J Leukoc Biol 2012; 93:251-8. [DOI: 10.1189/jlb.0612302] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Li LY, Ciren BZ, Zhan D, Wei YF. [Comprehensive utilization and development of traditional Tibetan medicine in China]. Zhongguo Zhong Yao Za Zhi 2001; 26:808-10. [PMID: 12776325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
OBJECTIVE To deal with the further investigation field by discussing the status and present problem of traditional Tibetan medicine. METHOD Previous relevant investigations and literatures were summed up in the field. The present situation of traditional Tibetan medicine in China was analysed. RESULT The textual research, basic medicinal property, exploration of developable medicinal resource and protection of endangered medicinal species etc. were elaborated and the key problem of further investigation in 21st century was expounded. CONCLUSION The textual research, basic medicinal property, exploration of develoable medicinal resources, especially monographic study on protection of major endangered medicinal resources should be intensified. Domestication and cultivation, and exploration of good-quality medicinal resources, quality evaluation and exploitation of effectual prescriptions are the focal field in the study of traditional Tibetan medicine.
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Affiliation(s)
- L Y Li
- Chongqing Institute of Chinese Materia Medica, Chongqing 400065, China
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Abstract
While searching for oligosaccharides containing rhamnose residues in the endopolygalacturonase (EPG) digest of saponified citrus pectin, we found several oligomers containing, in addition to galacturonic acid, a sugar previously unreported in pectin. The 1- and 2-D 1H NMR spectra of the oligosaccharides were consistent with the sugar being a uronic acid with its 2- and 3-hydroxyls being axial and 4-hydroxyl being equatorial. MALDI-TOF mass spectrometry indicated that the oligomers consisted solely of uronic acids. Reduction of the uronic acids in the oligosaccharides converted them to galactose and altrose. The altrose was found to be the L enantiomer by comparison of its trimethylsilyl (-)-2-butyl glycosides to those of authentic D-altrose and a racemic mixture. The sugar was not found in oligosaccharides prepared from EPG digestion of citrus pectin deesterified with pectin methylesterase rather than saponification. Thus, it appears that during saponification, a small proportion of the methylesterified galacturonic acid residues in pectins is epimerized at C-5 leading to formation of L-altruronic acid residues.
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Affiliation(s)
- D Zhan
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater 74078-3035, USA
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Affiliation(s)
- R A Prade
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater 74078, USA
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Hermonat PL, Santin AD, Zhan D. Binding of the human papillomavirus type 16 E7 oncoprotein and the adeno-associated virus Rep78 major regulatory protein in vitro and in yeast and the potential for downstream effects. J Hum Virol 2000; 3:113-24. [PMID: 10881991] [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: 02/16/2023]
Abstract
OBJECTIVE Both human papillomavirus (HPV) and adeno-associated virus (AAV) are common anogenital viruses and likely co-infect the epithelium in vivo. However, whereas HPVs are positively associated with cervical cancer, AAV appears to be negatively associated. In tissue culture, AAV-encoded Rep78--which is essential for AAV--inhibits gene expression and oncogenic transformation by HPV-16/18 and bovine papillomavirus type 1. Here we observed whether the HPV-16 E7 oncoprotein might recognize and bind Rep78. Further, upon finding Rep78-E7 binding, we investigated some of the potential downstream effects such an interaction might have. E7 is capable of recognizing a variety of proteins, including RB105, TATA box-binding protein (TBP), TBP-associated factor (TAF)(II)110, E2F, cyclins A and D, and c-jun. Some of these interactions are likely responsible for E7's cancer-promoting activity. STUDY DESIGN/METHODS Rep78-E7 interaction was investigated in vitro by West(far)-Western and affinity chromatography analysis and in vivo in living yeast by the GAL4 two-hybrid cDNA assay. Mapping of the E7 binding domain within Rep78 was carried out using a series of amino- and carboxy-truncated Rep78 proteins in a West(far)-Western assay. Downstream effects of the interaction were analyzed by competitive affinity chromatography (protein-protein) and competitive electrophoretic mobility shift assay (protein-DNA). RESULTS E7 and Rep78 were found to interact both in vitro and in vivo (yeast) in all assays attempted. The E7 binding domain within Rep78 was found to reside within amino acids 121-370. Regarding downstream effects of this interaction, Rep78 was found to mildly inhibit E7-TAF(II)110 and E7-RB105 interaction in vitro but to have little affect on E7-TBP interaction. Finally, it was found that E7 was able to affect Rep78's interaction with AAV's terminal repeat (TR) DNA in vitro, reducing the formation of the largest sized Rep78-TR complexes in a dosage-dependent manner. CONCLUSIONS These data suggest that the Rep78-E7 interaction may have repercussions for both viruses. The Rep78-E7 interaction may be a second mechanism, in addition to Rep78 regulation of the p97 promoter, by which AAV inhibits HPV-16 oncogenic transformation. These data also suggest that HPV-16 may affect the AAV life cycle by altering Rep78-TR interaction.
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Affiliation(s)
- P L Hermonat
- Department of Obstetrics and Gynecology, University of Arkansas for Medical Sciences, Little Rock 72205, USA
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Zhan D, Santin AD, Liu Y, Parham GP, Li C, Meyers C, Hermonat PL. Binding of the human papillomavirus type 16 p97 promoter by the adeno-associated virus Rep78 major regulatory protein correlates with inhibition. J Biol Chem 1999; 274:31619-24. [PMID: 10531369 DOI: 10.1074/jbc.274.44.31619] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Human papillomavirus type 16 (HPV-16) infection is positively associated with cervical cancer, whereas adeno-associated virus (AAV) infection is negatively associated with this same cancer. In earlier studies these two virus types have been shown to directly interact, with AAV inhibiting or enhancing papillomavirus functions depending upon the specific circumstances. One defined interaction between these two viruses is the ability of the AAV Rep78 major regulatory protein to inhibit gene expression of the E6 promoter of BPV-1 (bovine papillomavirus type 1) and HPV types 16 and 18. As Rep78 is a DNA binding transcription factor, we considered whether Rep78 might bind HPV-16 DNA. Here, Rep78 is demonstrated to bind a 44-base pair region (nucleotides 14-56) within the HPV-16 p97 promoter using the electrophoretic mobility shift assay. This region is important for HPV-16 because it includes functional Sp1 and E2 protein binding motifs as well as part of the origin of replication. Furthermore, two Rep78 amino acid substitution mutants, at positions 77 or 64-65, were identified that did not recognize p97 DNA. Both of these Rep78 mutants were found to be defective for inhibition of p97 promoter activity in HeLa and T-47D nuclear extracts in vitro, in a transient chloramphenicol acetyltransferase assay, as well as defective for full inhibition of HPV-16-directed focus formation. These data, taken together, strongly suggest that the Rep78-p97 promoter interaction is at least partially responsible for Rep78-mediated inhibition of HPV-16. Finally, the finding that Rep78 specifically recognizes p97 DNA is surprising because the p97 promoter region contains no GAGC motifs, the core motif for Rep78 recognition. These data suggest that the p97 promoter may represent a new prototypical DNA target type for Rep78.
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Affiliation(s)
- D Zhan
- Department of Obstetrics and Gynecology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA
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Santin AD, Hermonat PL, Ravaggi A, Chiriva-Internati M, Zhan D, Pecorelli S, Parham GP, Cannon MJ. Induction of human papillomavirus-specific CD4(+) and CD8(+) lymphocytes by E7-pulsed autologous dendritic cells in patients with human papillomavirus type 16- and 18-positive cervical cancer. J Virol 1999; 73:5402-10. [PMID: 10364287 PMCID: PMC112596 DOI: 10.1128/jvi.73.7.5402-5410.1999] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/1998] [Accepted: 03/24/1999] [Indexed: 02/02/2023] Open
Abstract
Human papillomavirus (HPV) type 16 (HPV 16) and HPV type 18 (HPV 18) are implicated in the induction and progression of the majority of cervical cancers. Since the E6 and E7 oncoproteins of these viruses are expressed in these lesions, such proteins might be potential tumor-specific targets for immunotherapy. In this report, we demonstrate that recombinant, full-length E7-pulsed autologous dendritic cells (DC) can elicit a specific CD8(+) cytotoxic T-lymphocyte (CTL) response against autologous tumor target cells in three patients with HPV 16- or HPV 18-positive cervical cancer. E7-specific CTL populations expressed strong cytolytic activity against autologous tumor cells, did not lyse autologous concanavalin A-treated lymphoblasts or autologous Epstein-Barr virus-transformed lymphoblastoid cell lines (LCL), and showed low levels of cytotoxicity against natural killer cell-sensitive K562 cells. Cytotoxicity against autologous tumor cells could be significantly blocked by anti-HLA class I (W6/32) and anti-CD11a/LFA-1 antibodies. Phenotypically, all CTL populations were CD3(+)/CD8(+), with variable levels of CD56 expression. CTL induced by E7-pulsed DC were also highly cytotoxic against an allogeneic HLA-A2(+) HPV 16-positive matched cell line (CaSki). In addition, we show that specific lymphoproliferative responses by autologous CD4(+) T cells can also be induced by E7-pulsed autologus DC. E7-specific CD4(+) T cells proliferated in response to E7-pulsed LCL but not unpulsed LCL, and this response could be blocked by anti-HLA class II antibody. Finally, with two-color flow cytometric analysis of intracellular cytokine expression at the single-cell level, a marked Th1-like bias (as determined by the frequency of gamma interferon- and interleukin 4-expressing cells) was observable for both CD8(+) and CD4(+) E7-specific lymphocyte populations. Taken together, these data demonstrate that full-length E7-pulsed DC can induce both E7-specific CD4(+) T-cell proliferative responses and strong CD8(+) CTL responses capable of lysing autologous naturally HPV-infected cancer cells in patients with cervical cancer. These results may have important implications for the treatment of cervical cancer patients with active or adoptive immunotherapy.
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Affiliation(s)
- A D Santin
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Arkansas, Little Rock, Arkansas, USA
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Abstract
In many cases, samples for capillary zone electrophoresis (CZE) are derivatized with a chromophore or fluorophore to enhance their detectability. To ensure efficient labeling, a large excess of labeling agent is often used, which leads to the presence of a large peak for unreacted reagent. Here we report that excess reagent can be reacted with "scavenger beads" carrying an appropriate functional group to remove it from the sample solution. We present examples of removal of aminonaphthalene mono-, di-, and trisulfonic acid from mixtures in which they were used to label mono- or oligosaccharides by reductive amination. Aldehyde-containing scavenger beads were made by oxidizing Sephadex G-50 beads with sodium periodate. These were added to the labeling reaction mixtures after the reductive amination of the sugars was complete. Almost complete elimination of the peak from the labeling agent could be achieved.
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Affiliation(s)
- A J Mort
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater 74078-3035, USA.
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22
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Abstract
Commercial citrus pectin containing galacturonic acid and rhamnose in a ratio of approximately 40:1 was saponified and then exhaustively digested with endopolygalacturonase (EPG). The products were separated by ultrafiltration into low-molecular-weight (LMW) and high-molecular-weight (HMW) fractions. The LMW fraction accounted for 80% of the starting material, but for only 10% of the total rhamnose. The molar ratio of galacturonic acid to rhamnose of the LMW fraction was 236, suggesting that very few small Rha-containing oligomers were generated by the EPG digestion. No distinct Rha-containing oligomers were found by various chromatographic analyses of the LMW fraction. The HMW fraction, which only accounted for 10% by weight of the starting pectin, contained more than 85% of the rhamnose. The ratio of GalA to Rha in the HMW fraction was 1.7:1 and partial acid hydrolysis of this fraction produced a series of oligomers consisting of GalA-Rha repeating units, suggesting that it contained rhamnogalacturonan, which has a backbone composed of GalA-Rha disaccharide repeating units. The HMW fraction also contained large amounts of arabinose and galactose, which probably originated from side chains linked to some of the rhamnose residues. We propose that commercial citrus pectin is composed of two regions: the predominant region consists of chains of uninterrupted 1,4-linked alpha-D-GalA residues with between 60-70% of the residues methyl esterified; and the other region consists of rhamnogalacturonan with a backbone composed of GalA-Rha disaccharide repeating units and neutral sugar side chains.
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Affiliation(s)
- D Zhan
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater 74078-3035, USA
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Hermonat PL, Santin AD, Batchu RB, Zhan D. The adeno-associated virus Rep78 major regulatory protein binds the cellular TATA-binding protein in vitro and in vivo. Virology 1998; 245:120-7. [PMID: 9614873 DOI: 10.1006/viro.1998.9144] [Citation(s) in RCA: 34] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Rep78 is the major regulatory protein of adenoassociated virus (AAV). Rep78 is able to transcriptionally regulate all three of AAV's promoters, as well as a variety of heterologous promoters. In an attempt to understand the mechanism of action by which Rep78 is able to regulate gene expression, we are investigating Rep78's possible protein-protein interaction with basal transcription factors. One such critical basal transcription factor is the human TATA binding protein, TBP. TBP is a core factor required for the assemblage of the transcription initiation complex, TFIID. In this report an in vitro interaction between Rep78 and TBP was demonstrated in three different assay systems, including West(far)-Western analysis, electrophoretic mobility shift assay-supershift, and coimmunoprecipitation. Furthermore, using the yeast GAL4 two-hybrid system, an in vivo interaction between Rep78 and TBP was also demonstrated. Further still, the amino half of Rep78 is shown to be needed for Rep78-TBP interaction. Mutations within this region of Rep78 are known to be defective for transcriptional regulatory ability, suggesting a biological role for this interaction. Thus, Rep78 may regulate transcription through binding and regulating TBP's numerous interactions. Furthermore, as Rep78 is known to bind at least one other transcription factor (Sp 1) and likely others, Rep78 may function as a TBP-associated factor in an altered TFIID-like complex.
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Affiliation(s)
- P L Hermonat
- Department of Obstetrics and Gynecology, University of Arkansas for Medical Sciences, Little Rock 72205, USA
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Yi P, Zhan D, Samokyszyn VM, Doerge DR, Fu PP. Synthesis and 32P-postlabeling/high-performance liquid chromatography separation of diastereomeric 1,N2-(1,3-propano)-2'-deoxyguanosine 3'-phosphate adducts formed from 4-hydroxy-2-nonenal. Chem Res Toxicol 1997; 10:1259-65. [PMID: 9403180 DOI: 10.1021/tx970100r] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
4-Hydroxy-2-nonenal (HNE), a major electrophilic byproduct of lipid peroxidation, is mutagenic and cytotoxic. The two pairs of HNE-derived diastereomeric 1,N2-propanodeoxyguanosine 3'-monophosphate adducts were synthesized from reaction of HNE with 2'-deoxyguanosine 3'-monophosphate. After HPLC separation, these adducts were characterized by UV-visible absorption and negative ion electrospray ionization MS/MS analysis. To further characterize the structures, these adducts were dephosphorylated to the corresponding HNE-modified deoxyguanosine adducts and their HPLC retention times and UV spectra were compared with those of the synthetic standards prepared from reaction of HNE with 2'-deoxyguanosine. Separation of these adducts by 32P-postlabeling/HPLC was developed. Reaction of HNE with calf thymus DNA resulted in only one pair of diastereomeric adducts, with one adduct predominantly formed with a modification level of 1.2 +/- 0.5 adducts/10(7) nucleotides.
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Affiliation(s)
- P Yi
- National Center for Toxicological Research, Jefferson, Arkansas 72079, USA
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