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Zhang D, Cheng Y, Ji Y, Miao Q, Chen B, Wang J, Wu G, Yuan C, Zheng G, Liu H, Qiu X, Gong J, Ba H, Pan L, Ma X, Qi Y, Shi Y, Zhang Q, Li D, Xu Y. A training program for improving the capacity of infection high-throughput sequencing and diagnosis in China. BMC Med Educ 2024; 24:142. [PMID: 38355463 PMCID: PMC10865699 DOI: 10.1186/s12909-024-05100-2] [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] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 01/26/2024] [Indexed: 02/16/2024]
Abstract
BACKGROUND Infectious diseases are a serious threat to human especially since the COVID-19 outbreak has proved the importance and urgency of their diagnosis and treatment again. Metagenomic next-generation sequencing (mNGS) has been widely used and recognized in clinical and carried out localized testing in hospitals. Increasing the training of mNGS detection technicians can enhance their professional quality and more effectively realize the application value of the hospital platform. METHODS Based on the initial theoretical understanding and practice of the mNGS platform for localization construction, we have designed a training program to enhance the ability of technicians to detect pathogens by utilizing mNGS, and hence to conduct training practices nationwide. RESULTS Until August 30, 2022, the page views of online classes have reached 51,500 times and 6 of offline small-scale training courses have been conducted. A total of 67 trainees from 67 hospitals have participated in the training with a qualified rate of 100%. After the training course, the localization platform of 1 participating hospital has been put into use, 2 have added the mNGS localization platform for admission, among which 3 have expressed strong intention of localization. CONCLUSIONS This study focuses on the training procedures and practical experience of the project which is the first systematic standardized program of mNGS in the world. It solves the training difficulties in the current industry, and effectively promotes the localization construction and application of mNGS in hospitals. It has great development potential in the future and is worth further promotion.
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Affiliation(s)
- Dong Zhang
- Department of Clinical Laboratory, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
- Key Laboratory of Pathogen Infection Prevention and Control (Peking Union Medical College), Ministry of Education, Beijing, China
| | - Yunfeng Cheng
- Zhongshan Hospital, Fudan University, 180 Fenglin Rd, 200032, Shanghai, China
| | - Yuan Ji
- Zhongshan Hospital, Fudan University, 180 Fenglin Rd, 200032, Shanghai, China
| | - Qing Miao
- Zhongshan Hospital, Fudan University, 180 Fenglin Rd, 200032, Shanghai, China
| | - Bojiang Chen
- Precision Medicine Center, Precision Medicine Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, 610041, Chengdu, China
| | - Jing Wang
- Precision Medicine Center, Precision Medicine Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, 610041, Chengdu, China
| | - Guoqiu Wu
- Center of Clinical Laboratory Medicine, Zhongda Hospital, Southeast University, 210009, Nanjing, Jiangsu, China
| | - Chenyan Yuan
- Center of Clinical Laboratory Medicine, Zhongda Hospital, Southeast University, 210009, Nanjing, Jiangsu, China
| | - Guangjuan Zheng
- Genetic Testing Lab, The Second Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Han Liu
- Genetic Testing Lab, The Second Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xinmin Qiu
- Genetic Testing Lab, The Second Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jie Gong
- Department of Clinical Laboratory, Wuhan Center for Clinical Laboratory, Wuhan, Hubei, China
| | - Hongping Ba
- Department of Clinical Laboratory, Wuhan Center for Clinical Laboratory, Wuhan, Hubei, China
| | - Liping Pan
- Department of Clinical Laboratory, Wuhan Center for Clinical Laboratory, Wuhan, Hubei, China
| | - Xiaoling Ma
- Department of Laboratory Medicine, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, 230000, Hefei, Anhui, China
| | - Yingjie Qi
- Department of Laboratory Medicine, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, 230000, Hefei, Anhui, China
| | - Yuru Shi
- Department of Laboratory Medicine, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, 230000, Hefei, Anhui, China
| | - Qi Zhang
- Beijing life oasis public service center, Beijing, China
| | - Dan Li
- BGI Genomics, 518083, Shenzhen, China
| | - Yingchun Xu
- Department of Clinical Laboratory, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China.
- Key Laboratory of Pathogen Infection Prevention and Control (Peking Union Medical College), Ministry of Education, Beijing, China.
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Yang P, Zhang Y, Zhang R, Wang Y, Zhu S, Peng X, Zeng Y, Yang B, Pan M, Gong J, Ba H. Plasma-derived exosomal immunoglobulins IGHV4-4 and IGLV1-40 as new non-small cell lung cancer biomarkers. Am J Cancer Res 2023; 13:1923-1937. [PMID: 37293178 PMCID: PMC10244100] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 04/07/2023] [Indexed: 06/10/2023] Open
Abstract
Exosomal proteins represent valuable research directions in the liquid biopsy of lung cancer (LC). Immunoglobulin subtypes, immunoglobulin molecules with different domains in variable regions, are products of B cell responses to different tumor antigens and are associated with tumor incidence and development. The plasma of patients with LC should theoretically contain a large number of B cell-derived exosomes that specifically recognize tumor antigens. This paper intended to assess the value of the proteomic screening of plasma exosomal immunoglobulin subtypes for diagnosing non-small cell LC (NSCLC). The plasma exosomes of NSCLC patients and healthy control participants (HCs) were isolated using ultracentrifugation. Label-free proteomics was employed to assess the differentially expressed proteins (DEPs), while the biological characteristics of the DEPs were analyzed using GO enrichment. The immunoglobulin content in the top two fold change (FC) values of the DEPs and the immunoglobulin with the lowest P-value were verified using an enzyme-linked immunosorbent assay (ELISA). The differentially expressed immunoglobulin subtypes verified via ELISA were selected to statistically analyze the receiver operating characteristic curve (ROC), after which the diagnostic values of the NSCLC immunoglobulin subtypes were determined via the ROC area under the curve (AUC). The plasma exosomes of the NSCLC patients contained 38 DEPs, of which 23 were immunoglobulin subtypes, accounting for 60.53%. The DEPs were mainly related to the binding between immune complexes and antigens. The ELISA results showed significant differences between the immunoglobulin heavy variable 4-4 (IGHV4-4) and immunoglobulin lambda variable 1-40 (IGLV1-40) in the LC patients and HCs. Compared with the HCs, the AUCs of IGHV4-4, IGLV1-40, and a combination of the two in diagnosing NSCLC were 0.83, 0.88, and 0.93, respectively, while the AUCs for non-metastatic cancer were 0.80, 0.85, and 0.89. Moreover, their diagnostic values for metastatic cancer compared to non-metastatic cancer displayed AUCs of 0.71, 0.74, and 0.83, respectively. When IGHV4-4 and IGLV1-40 were combined with serum CEA to diagnose LC, the AUC value increased, exhibiting values of 0.95, 0.89, and 0.91 for the NSCLC, non-metastatic, and metastatic groups, respectively. Plasma-derived exosomal immunoglobulins containing IGHV4-4 and IGLV 1-40 domains can provide new biomarkers for diagnosing NSCLC and metastatic patients.
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Affiliation(s)
- Peng Yang
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese MedicineGuiyang, Guizhou, PR China
| | - Yang Zhang
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese MedicineGuiyang, Guizhou, PR China
| | - Ruping Zhang
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese MedicineGuiyang, Guizhou, PR China
| | - Yun Wang
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese MedicineGuiyang, Guizhou, PR China
| | - Shengjin Zhu
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese MedicineGuiyang, Guizhou, PR China
| | - Xin Peng
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese MedicineGuiyang, Guizhou, PR China
| | - Yimin Zeng
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese MedicineGuiyang, Guizhou, PR China
| | - Bing Yang
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese MedicineGuiyang, Guizhou, PR China
| | - Meijun Pan
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese MedicineGuiyang, Guizhou, PR China
| | - Jie Gong
- Department of Clinical Laboratory, Wuhan Center for Clinical LaboratoryWuhan, Hubei, PR China
| | - Hongping Ba
- Department of Clinical Laboratory, Wuhan Center for Clinical LaboratoryWuhan, Hubei, PR China
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Ba H, Dai Z, Zhang Z, Zhang P, Yin B, Wang J, Li Z, Zhou X. Antitumor effect of CAR-T cells targeting transmembrane tumor necrosis factor alpha combined with PD-1 mAb on breast cancers. J Immunother Cancer 2023; 11:jitc-2021-003837. [PMID: 36720496 PMCID: PMC10098269 DOI: 10.1136/jitc-2021-003837] [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] [Accepted: 01/09/2023] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Our previous study showed that transmembrane tumor necrosis factor alpha (tmTNF-α) is overexpressed in primary breast cancers including triple-negative breast cancers (TNBCs). Chimeric antigen receptor engineered-T (CAR-T) cells have been successfully used mainly in B-cell malignancies. METHODS We generated CAR-T cells targeting tmTNF-α but not secreted tumor necrosis factor alpha and assessed the antitumor effect of the CAR-T cells on tmTNF-α-expressing breast cancer cells in vitro and in vivo. RESULTS Our tmTNF-α CAR-T cells showed potent cytotoxicity against tmTNF-α-expressing breast cancer cells but not tmTNF-α-negative tumor cells with increased secretion of interferon gamma (IFN-γ) and interleukin (IL)-2 in vitro. In tmTNF-α-overexpressing TNBC-bearing mice, the tmTNF-α CAR-T therapy induced evident tumor regression, prolonged survival and increased serum concentrations of IFN-γ and IL-2. However, we found thattmTNF-α induced programmed death-ligand 1 (PD-L1) expression through the p38 pathway via TNF receptor (TNFR) and through the NF-κB and AKT pathways via outside-to-inside (reverse) signaling, which might limit the efficacy of the CAR-T cell therapy. Blockage of the PD-L1/programmed death-1 (PD-1) pathway by PD-1 monoclonal antibody significantly enhanced the antitumor effect of the tmTNF-α CAR-T cell therapy in vitro and in vivo, and the combination was effective for antiprimary tumors and had a tendency to increase the antimetastasis effect of the CAR-T cell therapy. CONCLUSION Our findings suggest a potent antitumor efficacy of the tmTNF-α CAR-T cells that can be enhanced by anti-PD-L1/PD-1 because high PD-L1 expression in TNBC was induced by the tmTNF-α signaling, indicating a promising individual therapy for tmTNF-α-positive breast cancers including TNBC.
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Affiliation(s)
- Hongping Ba
- Department of Immunology, College of Basic Medicine of Tongji Medical College of Huazhong University of Scince and Technology, Wuhan, Hubei, People's Republic of China
| | - Zigang Dai
- Department of Hematology, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Zunyue Zhang
- Department of Immunology, College of Basic Medicine of Tongji Medical College of Huazhong University of Scince and Technology, Wuhan, Hubei, People's Republic of China
| | - Peng Zhang
- Department of Immunology, College of Basic Medicine of Tongji Medical College of Huazhong University of Scince and Technology, Wuhan, Hubei, People's Republic of China
| | - Bingjiao Yin
- Department of Immunology, College of Basic Medicine of Tongji Medical College of Huazhong University of Scince and Technology, Wuhan, Hubei, People's Republic of China
| | - Jing Wang
- Department of Immunology, College of Basic Medicine of Tongji Medical College of Huazhong University of Scince and Technology, Wuhan, Hubei, People's Republic of China
| | - Zhuoya Li
- Department of Immunology, College of Basic Medicine of Tongji Medical College of Huazhong University of Scince and Technology, Wuhan, Hubei, People's Republic of China
| | - Xiaoxi Zhou
- Department of Hematology, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
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Ning N, Zhang S, Wu Q, Li X, Kuang D, Duan Y, Xia M, Liu H, Weng J, Ba H, Tang Z, Cheng X, Mei H, Huang L, Ao Q, Wang G, Hu Y, Laurence A, Wang J, Wang G, Yang XP. Inhibition of acylglycerol kinase sensitizes DLBCL to venetoclax via upregulation of FOXO1-mediated BCL-2 expression. Theranostics 2022; 12:5537-5550. [PMID: 35910796 PMCID: PMC9330532 DOI: 10.7150/thno.72786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 05/18/2022] [Indexed: 11/28/2022] Open
Abstract
Background: Despite of the paradigm change on the treatments of acute myeloid leukemia (AML) and chronic lymphocytic leukemia (CLL) by venetoclax, it has been less successful in the treatment of diffuse large B-cell lymphoma (DLBCL). Here, we explored whether acylglycerol kinase regulates the sensitivity of DLBCLs to venetoclax and its mechanism in both cell lines and preclinical animal models. Methods: The expression of AGK and sensitivity to venetoclax of seven DLBCL cell lines were determined. Upon knockdown and overexpression of AGK by lentivirus in DLBCL cells, the venetoclax-induced apoptosis and PTEN-FOXO1-BCL-2 signaling axis were evaluated in vitro. The efficacy of venetoclax and PTEN-FOXO1-BCL-2 signaling axis were evaluated in immunodeficient NCG mice that were implanted with control or shAGK stably transduced SU-DHL4 cells. The expressions of AGK, BCL-2 and FOXO1 were evaluated in tumor tissues of DLBCL patients. Results: AGK expression was inversely correlated with sensitivity of DLBCL to venetoclax. Inhibition of AGK rendered the DLBCL cells more sensitive to venetoclax. Mechanistically, AGK phosphorylated and inactivated PTEN, which led to AKT activation and reduced FOXO1 nuclear translocation. Inhibition of AGK also led to enhanced efficacy of venetoclax for suppression of DLBCL tumor growth in vivo, which was dependent on FOXO1. In human DLBCL tumor tissues, the expression of AGK inversely correlated with BCL-2 expression, as well as the amounts of nuclear FOXO1. Conclusions: Our data demonstrated that AGK regulates venetoclax response in DLBCL via PTEN-FOXO1-BCL-2 signaling axis. Targeting AGK may enhance the efficacy of venetoclax for the treatment of DLBCL patients.
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Ba H, Jiang R, Zhang M, Yin B, Wang J, Li Z, Li B, Zhou X. Suppression of Transmembrane Tumor Necrosis Factor Alpha Processing by a Specific Antibody Protects Against Colitis-Associated Cancer. Front Immunol 2021; 12:687874. [PMID: 34675913 PMCID: PMC8524043 DOI: 10.3389/fimmu.2021.687874] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 09/16/2021] [Indexed: 12/26/2022] Open
Abstract
Soluble tumor necrosis factor-α (sTNF-α) plays an important role in colitis-associated cancer (CAC); however, little is known about transmembrane TNF-α (tmTNF-α). Here, we observed an increase in sTNF-α mainly in colitis tissues from an azoxymethane/dextran sodium sulfate (DSS)-induced CAC mouse model whereas tmTNF-α levels were chiefly increased on epithelial cells at the tumor stage. The ratio of intracolonic tmTNF-α/sTNF-α was negatively correlated with the levels of pro-inflammatory mediators (IL-1β, IL-6, and NO) and M1 macrophages but positively correlated with the infiltration of myeloid-derived suppressor cells, regulatory T cells, and the level of the anti-inflammatory cytokine IL-10, suggesting an anti-inflammatory effect of tmTNF-α. This effect of tmTNF-α was confirmed again by the induction of resistance to LPS in colonic epithelial cell lines NCM460 and HCoEpiC through the addition of exogenous tmTNF-α or transfection of the tmTNF-α leading sequence that lacks the extracellular segment but retains the intracellular domain of tmTNF-α. A tmTNF-α antibody was used to block tmTNF-α shedding after the first or second round of inflammation induction by DSS drinking to shift the time window of tmTNF-α expression ahead to the inflammation stage. Antibody treatment significantly alleviated inflammation and suppressed subsequent adenoma formation, accompanied by increased apoptosis. An antitumor effect was also observed when the antibody was administered at the malignant phase of CAC. Our results reveal tmTNF-α as a novel molecular marker for malignant transformation in CAC and provide a new insight into blocking the pathological process by targeting tmTNF-α processing.
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Affiliation(s)
- Hongping Ba
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rui Jiang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Meng Zhang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bingjiao Yin
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Wang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhuoya Li
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Baihua Li
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoxi Zhou
- Department of Hematology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
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Miao K, Zhou L, Ba H, Li C, Gu H, Yin B, Wang J, Yang XP, Li Z, Wang DW. Transmembrane tumor necrosis factor alpha attenuates pressure-overload cardiac hypertrophy via tumor necrosis factor receptor 2. PLoS Biol 2020; 18:e3000967. [PMID: 33270628 PMCID: PMC7714153 DOI: 10.1371/journal.pbio.3000967] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 10/23/2020] [Indexed: 12/20/2022] Open
Abstract
Tumor necrosis factor-alpha (TNF-α) plays an important pathogenic role in cardiac hypertrophy and heart failure (HF); however, anti-TNF is paradoxically negative in clinical trials and even worsens HF, indicating a possible protective role of TNF-α in HF. TNF-α exists in transmembrane (tmTNF-α) and soluble (sTNF-α) forms. Herein, we found that TNF receptor 1 (TNFR1) knockout (KO) or knockdown (KD) by short hairpin RNA or small interfering RNA (siRNA) significantly alleviated cardiac hypertrophy, heart dysfunction, fibrosis, and inflammation with increased tmTNF-α expression, whereas TNFR2 KO or KD exacerbated the pathological phenomena with increased sTNF-α secretion in transverse aortic constriction (TAC)- and isoproterenol (ISO)-induced cardiac hypertrophy in vivo and in vitro, respectively, indicating the beneficial effects of TNFR2 associated with tmTNF-α. Suppressing TNF-α converting enzyme by TNF-α Protease Inhibitor-1 (TAPI-1) to increase endogenous tmTNF-α expression significantly alleviated TAC-induced cardiac hypertrophy. Importantly, direct addition of exogenous tmTNF-α into cardiomyocytes in vitro significantly reduced ISO-induced cardiac hypertrophy and transcription of the pro-inflammatory cytokines and induced proliferation. The beneficial effects of tmTNF-α were completely blocked by TNFR2 KD in H9C2 cells and TNFR2 KO in primary myocardial cells. Furthermore, we demonstrated that tmTNF-α displayed antihypertrophic and anti-inflammatory effects by activating the AKT pathway and inhibiting the nuclear factor (NF)-κB pathway via TNFR2. Our data suggest that tmTNF-α exerts cardioprotective effects via TNFR2. Specific targeting of tmTNF-α processing, rather than anti-TNF therapy, may be more useful for the treatment of hypertrophy and HF. In contrast to detrimental effects of soluble tumor necrosis factor-alpha (TNF-α) via TNFR1, this study shows that transmembrane TNF-α protects the heart by suppressing pressure overload-induced cardiac hypertrophy and inflammation via TNFR2. Targeting tmTNF-α processing may be more useful than TNF-antagonist for treatment of hypertrophy and heart failure.
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MESH Headings
- Animals
- Apoptosis/drug effects
- Cardiomegaly/metabolism
- Cardiomegaly/physiopathology
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Knockout
- Myocytes, Cardiac/metabolism
- NF-kappa B/metabolism
- Receptors, Tumor Necrosis Factor, Type I/genetics
- Receptors, Tumor Necrosis Factor, Type I/metabolism
- Receptors, Tumor Necrosis Factor, Type II/genetics
- Receptors, Tumor Necrosis Factor, Type II/metabolism
- Receptors, Tumor Necrosis Factor, Type II/physiology
- Signal Transduction/drug effects
- Tumor Necrosis Factor-alpha/metabolism
- Tumor Necrosis Factor-alpha/physiology
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Affiliation(s)
- Kun Miao
- Division of Cardiology, Department of Internal Medicine and Department of Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ling Zhou
- Division of Cardiology, Department of Internal Medicine and Department of Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Hongping Ba
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Chenxi Li
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Haiyan Gu
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Bingjiao Yin
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jing Wang
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Xiang-ping Yang
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Zhuoya Li
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- * E-mail: (ZL); (DWW)
| | - Dao Wen Wang
- Division of Cardiology, Department of Internal Medicine and Department of Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- * E-mail: (ZL); (DWW)
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Dzudie A, Ngongang Ouankou C, Nganhyim L, Mouliom S, Ba H, Kamdem F, Ndjebet J, Nzali A, Tantchou C, Nkoke C, Barche B, Abanda M, Metogo Mbengono UA, Hentchoya R, Petipe Nkappe C, Ouankou M, Kouam Kouam C, Mintom P, Boombhi J, Kuate Mfeukeu L, Ngatchou W, Kingue S, Ngowe Ngowe M. Long-term prognosis of patients with permanent cardiac pacemaker indication in three referral cardiac centers in Cameroon: Insights from the National pacemaker registry. Ann Cardiol Angeiol (Paris) 2020; 70:18-24. [PMID: 32778387 DOI: 10.1016/j.ancard.2020.07.005] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 07/21/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND There is evidence that cardiac pacemakers improve symptoms and quality of life in patients with severe bradycardia. Globally, the number of pacemaker implantations is on the rise. However, the associated high-cost limits pacemaker's accessibility in low resource settings. This study aimed to investigate access to pacemakers and the long-term outcome of patients requiring a pacemaker. METHOD We conducted a cohort study in 03 health care structures in Cameroon. Participants aged at least 18 years with indication for a permanent pacemaker between January 2010 and May 2016 were included. Clinical profile, electrocardiography, pacemaker implantation parameters were recorded. Long-term survival was studied by event-free analysis using the Kaplan-Meier method. RESULTS In total, 147 participants (mean age 67.7±13.7 years, female 58.5%) were included. Fatigue (78.7%), dyspnoea (77.2%), dizziness (47.1%) and palpitations (40.4%) were the main symptoms while syncope was present in 35.7% of patients. The main indication for cardiac pacemaker was atrioventricular block (85.3%). Forty (27.2%) could not be implanted with 34 (85%) of participants highlighting cost of intervention as main reason. VVIR was the main mode of stimulation (70.5%). Of 125 patients in which follow-up was ascertained, 17(13.5%) died after a median survival time of 2.8 years post diagnosis [IQR: 1.8-4.2]. The survival curve was better in participants with a pacemaker with a Hazard ratio of 2.7 [CI: 1.0-7.3, P=0.045]. CONCLUSION Our patients with severe heart blocks presented late and more than a quarter did not have access to pacemaker but its implantation multiplied the survival rate by 2.7 times at approximately 3 years post diagnosis. Improving early detection of heart blocks and access to cardiac pacing to reduce mortality shall be a key future priority.
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Affiliation(s)
- A Dzudie
- Cardiology and Cardiac Pacing Unit, Douala General Hospital, P.O Box 4856 Douala, Cameroon; Clinical Research Education Networking & Consultancy (CRENC), Douala, Cameroon; Faculty of Medicine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon.
| | | | - L Nganhyim
- Clinical Research Education Networking & Consultancy (CRENC), Douala, Cameroon
| | - S Mouliom
- Cardiology and Cardiac Pacing Unit, Douala General Hospital, P.O Box 4856 Douala, Cameroon
| | - H Ba
- Faculty of Medicine and Phramaceutical Sciences, University of Douala, Douala, Cameroon
| | - F Kamdem
- Faculty of Medicine and Phramaceutical Sciences, University of Douala, Douala, Cameroon
| | - J Ndjebet
- Douala Cardiovascular Centre, Douala, Cameroon
| | - A Nzali
- Deido District Hospital, Douala, Cameroon
| | | | - C Nkoke
- Clinical Research Education Networking & Consultancy (CRENC), Douala, Cameroon; Buea Regional Hospital, Buea, Cameroon
| | - B Barche
- Clinical Research Education Networking & Consultancy (CRENC), Douala, Cameroon; Faculty of Medicine and Phramaceutical Sciences, University of Douala, Douala, Cameroon; Douala Cardiovascular Centre, Douala, Cameroon
| | - M Abanda
- Clinical Research Education Networking & Consultancy (CRENC), Douala, Cameroon
| | - U A Metogo Mbengono
- Faculty of Medicine and Phramaceutical Sciences, University of Douala, Douala, Cameroon; Intensive Care Unit, Douala General Hospital, Douala, Cameroon
| | - R Hentchoya
- Intensive Care Unit, Douala General Hospital, Douala, Cameroon
| | - C Petipe Nkappe
- Buea Regional Hospital, Buea, Cameroon; Guidelines Advisory Network, Paris, France
| | - M Ouankou
- Cardiology and Medical Centre, Yaounde, Cameroon
| | - C Kouam Kouam
- Service of internal medicine and cardiology, Bafoussam regional hospital, Bafoussam, Cameroon
| | - P Mintom
- Faculty of Medicine and Phramaceutical Sciences, University of Douala, Douala, Cameroon; Deido District Hospital, Douala, Cameroon
| | - J Boombhi
- Faculty of Medicine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
| | - L Kuate Mfeukeu
- Faculty of Medicine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
| | - W Ngatchou
- Faculty of Medicine and Phramaceutical Sciences, University of Douala, Douala, Cameroon
| | - S Kingue
- Faculty of Medicine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
| | - M Ngowe Ngowe
- Faculty of Medicine and Phramaceutical Sciences, University of Douala, Douala, Cameroon
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Mapoure Y, Oumarou H, Ba H, Dzudie A, Luma H. Outcome of cardio-embolic stroke by atrial fibrillation: Lesson from Subsaharan Africa setting. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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9
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Xia Y, Liu N, Xie X, Bi G, Ba H, Li L, Zhang J, Deng X, Yao Y, Tang Z, Yin B, Wang J, Jiang K, Li Z, Choi Y, Gong F, Cheng X, O'Shea JJ, Chae JJ, Laurence A, Yang XP. The macrophage-specific V-ATPase subunit ATP6V0D2 restricts inflammasome activation and bacterial infection by facilitating autophagosome-lysosome fusion. Autophagy 2019; 15:960-975. [PMID: 30681394 DOI: 10.1080/15548627.2019.1569916] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Macroautophagy/autophagy is a conserved ubiquitous pathway that performs diverse roles in health and disease. Although many key, widely expressed proteins that regulate autophagosome formation followed by lysosomal fusion have been identified, the possibilities of cell-specific elements that contribute to the autophagy fusion machinery have not been explored. Here we show that a macrophage-specific isoform of the vacuolar ATPase protein ATP6V0D2/subunit d2 is dispensable for lysosome acidification, but promotes the completion of autophagy via promotion of autophagosome-lysosome fusion through its interaction with STX17 and VAMP8. Atp6v0d2-deficient macrophages have augmented mitochondrial damage, enhanced inflammasome activation and reduced clearance of Salmonella typhimurium. The susceptibility of atp6v0d2 knockout mice to DSS-induced colitis and Salmonella typhimurium-induced death, highlights the in vivo significance of ATP6V0D2-mediated autophagosome-lysosome fusion. Together, our data identify ATP6V0D2 as a key component of macrophage-specific autophagosome-lysosome fusion machinery maintaining macrophage organelle homeostasis and, in turn, limiting both inflammation and bacterial infection. Abbreviations: ACTB/β-actin: actin, beta; ATG14: autophagy related 14; ATG16L1: autophagy related 16-like 1 (S. cerevisiae); ATP6V0D1/2: ATPase, H+ transporting, lysosomal V0 subunit D1/2; AIM2: absent in melanoma 2; BMDM: bone marrow-derived macrophage; CASP1: caspase 1; CGD: chronic granulomatous disease; CSF1/M-CSF: colony stimulating factor 1 (macrophage); CTSB: cathepsin B; DSS: dextran sodium sulfate; IL1B: interleukin 1 beta; IL6: interleukin 6; IRGM: immunity-related GTPase family M member; KO: knockout; LAMP1: lysosomal-associated membrane protein 1; LC3: microtubule-associated protein 1 light chain 3; LPS: lipo-polysaccaride; NLRP3: NLR family, pyrin domain containing 3; PYCARD/ASC: PYD and CARD domain containing; SNARE: soluble N-ethylmaleimide-sensitive factor attachment protein receptor; SNAP29: synaptosomal-associated protein 29; SQSTM1/p62: sequestosome 1; STX17: syntaxin 17; TLR: toll-like receptor; TNF: tumor necrosis factor ; TOMM20: translocase of outer mitochondrial membrane 20; ULK1: unc-51 like kinase 1; VAMP8: vesicle-associated membrane protein 8; WT: wild type; 3-MA: 3-methyladenine.
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Affiliation(s)
- Yu Xia
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Na Liu
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Xiuxiu Xie
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Guoyu Bi
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Hongping Ba
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Lin Li
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Jinxia Zhang
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Xiaofei Deng
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Yao Yao
- b Department of Surgery, Tongji Hospital , Huazhong University of Science and Technology , Wuhan , China
| | - Zhaohui Tang
- b Department of Surgery, Tongji Hospital , Huazhong University of Science and Technology , Wuhan , China
| | - Binjiao Yin
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Jing Wang
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Kan Jiang
- c Lymphocyte Cell Biology Section , NIAMS, NIH , Bethesda , MD , USA
| | - Zhuoya Li
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Yongwon Choi
- d Perelman School of Medicine , University of Pennsylvania , Philadelphia , PA , USA
| | - Feili Gong
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - Xiang Cheng
- e Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital , Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
| | - John J O'Shea
- c Lymphocyte Cell Biology Section , NIAMS, NIH , Bethesda , MD , USA
| | - Jae Jin Chae
- f Inflammatory Disease Section , NHGRI, NIH , Bethesda , MD , USA
| | - Arian Laurence
- g Translational Gastroentology Unit, Nuffield department of medicine, John Radcliffe Hospital , University of Oxford , Oxford , UK
| | - Xiang-Ping Yang
- a Department of Immunology , School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China
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10
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Zhou L, Miao K, Yin B, Li H, Fan J, Zhu Y, Ba H, Zhang Z, Chen F, Wang J, Zhao C, Li Z, Wang DW. Cardioprotective Role of Myeloid-Derived Suppressor Cells in Heart Failure. Circulation 2018; 138:181-197. [PMID: 29437117 DOI: 10.1161/circulationaha.117.030811] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 01/16/2018] [Indexed: 11/16/2022]
Abstract
BACKGROUND Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of cells that expand in cancer, inflammation, and infection and negatively regulate inflammation and the immune response. Heart failure (HF) is a complex clinical syndrome wherein inflammation induction and incomplete resolution can potentially contribute to HF development and progression. However, the role of MDSCs in HF remains unclear. METHODS The percentage of MDSCs in patients with HF and in mice with pressure overload-induced HF using isoproterenol infusion or transverse aortic constriction (TAC) was detected by flow cytometry. The effects of MDSCs on isoproterenol- or TAC-induced HF were observed on depleting MDSCs with 5-fluorouracil (50 mg/kg) or gemcitabine (120 mg/kg), transferring purified MDSCs, or enhancing endogenous MDSCs with rapamycin (2 mg·kg-1·d-1). Hypertrophic markers and inflammatory factors were detected by ELISA, real-time polymerase chain reaction, or Western blot. Cardiac functions were determined by echocardiography and hemodynamic analysis. RESULTS The percentage of human leukocyte antigen-D-related (HLA-DR)-CD33+CD11b+ MDSCs in the blood of patients with HF was significantly increased and positively correlated with disease severity and increased plasma levels of cytokines, including interleukin-6, interleukin-10, and transforming growth factor-β. Furthermore, MDSCs derived from patients with HF inhibited T-cell proliferation and interferon-γ secretion. Similar results were observed in TAC- and isoproterenol-induced HF in mice. Pharmaceutical depletion of MDSCs significantly exacerbated isoproterenol- and TAC-induced pathological cardiac remodeling and inflammation, whereas adoptive transfer of MDSCs prominently rescued isoproterenol- and TAC-induced HF. Consistently, administration of rapamycin significantly increased endogenous MDSCs by suppressing their differentiation and improved isoproterenol- and TAC-induced HF, but MDSC depletion mostly blocked beneficial rapamycin-mediated effects. Mechanistically, MDSC-secreted molecules suppressed isoproterenol-induced hypertrophy and proinflammatory gene expression in cardiomyocytes in a coculture system. Neutralization of interleukin-10 blunted both monocytic MDSC- and granulocytic MDSC-mediated anti-inflammatory and antihypertrophic effects, but treatment with a nitric oxide inhibitor only partially blocked the antihypertrophic effect of monocytic MDSCs. CONCLUSIONS Our findings revealed a cardioprotective role of MDSCs in HF by their antihypertrophic effects on cardiomyocytes and anti-inflammatory effects through interleukin-10 and nitric oxide. Pharmacological targeting of MDSCs by rapamycin constitutes a promising therapeutic strategy for HF.
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Affiliation(s)
- Ling Zhou
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.)
| | - Kun Miao
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.)
| | - Bingjiao Yin
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.).,Department of Immunology, School of Basic Medicine (B.Y., Y.Z., H.B., Z.Z., F.C., J.W., and Z.L.), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huaping Li
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.)
| | - Jiahui Fan
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.)
| | - Yazhen Zhu
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.).,Department of Immunology, School of Basic Medicine (B.Y., Y.Z., H.B., Z.Z., F.C., J.W., and Z.L.), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hongping Ba
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.).,Department of Immunology, School of Basic Medicine (B.Y., Y.Z., H.B., Z.Z., F.C., J.W., and Z.L.), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zunyue Zhang
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.).,Department of Immunology, School of Basic Medicine (B.Y., Y.Z., H.B., Z.Z., F.C., J.W., and Z.L.), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fang Chen
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.).,Department of Immunology, School of Basic Medicine (B.Y., Y.Z., H.B., Z.Z., F.C., J.W., and Z.L.), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Wang
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.).,Department of Immunology, School of Basic Medicine (B.Y., Y.Z., H.B., Z.Z., F.C., J.W., and Z.L.), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chunxia Zhao
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.)
| | - Zhuoya Li
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.) .,Department of Immunology, School of Basic Medicine (B.Y., Y.Z., H.B., Z.Z., F.C., J.W., and Z.L.), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dao Wen Wang
- Division of Cardiology, Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders, Tongji Hospital (L.Z., K.M., H.L., J.F., C.Z., D.W.W.)
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11
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Ba H, Li B, Li X, Li C, Feng A, Zhu Y, Wang J, Li Z, Yin B. Transmembrane tumor necrosis factor-α promotes the recruitment of MDSCs to tumor tissue by upregulating CXCR4 expression via TNFR2. Int Immunopharmacol 2017; 44:143-152. [PMID: 28092866 DOI: 10.1016/j.intimp.2016.12.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 11/12/2016] [Accepted: 12/22/2016] [Indexed: 10/20/2022]
Abstract
Myeloid-derived suppressor cells (MDSCs) accumulated in tumor sites promote immune evasion. We found that TNFR deficiency-induced rejection of transplanted tumor was accompanied with markedly decreased accumulation of MDSCs. However, the mechanism(s) behind this phenomenon is not completely understood. Here, we demonstrated that TNFR deficiency did not affect the amount of MDSCs in bone marrow (BM), but decreased accumulation of Gr-1+CD11b+ MDSCs in the spleen and tumor tissues. The chemotaxis of Tnfr-/- MDSCs was prominently decreased in response to both tumor cell culture supernatants and tumor tissue homogenates from Tnfr-/- and wild-type mice, indicating an effect of TNFR signaling on chemokine receptor expression in MDSCs. We used real-time PCR to detect gene expression for several chemokine receptors in MDSCs from BM and found that CXCR4 was the most affected molecule at the transcriptional level in Tnfr-/- MDSCs. Neutralizing CXCR4 in wild-type MDSCs by a specific antibody blocked their chemotactic migration. Interestingly, it was tmTNF-α, but not sTNF-α, that induced CXCR4 expression in MDSCs. This effect of tmTNF-α was totally blocked in TNFR2-/- but not in TNFR1-/- MDSCs, and partially inhibited by PDTC or SB203580, an inhibitor of NF-κB or p38 MAPK pathway, respectively. Adoptive transfer of wild-type MDSCs restored MDSCs accumulation in tumors of Tnfr-/- mice, but this could be partially blocked by treatment with a CXCR4 inhibitor AMD3100. Our data suggest that tmTNF-α upregulates CXCR4 expression that promotes chemotaxis of MDSCs to tumor, and give a new insight into a novel mechanism by which tmTNF-α facilitates tumor immune evasion.
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Affiliation(s)
- Hongping Ba
- Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
| | - Baihua Li
- Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China; Department of Hematology, Yichang Central People's Hospital, Yichang, Hubei 443003, China.
| | - Xiaoyan Li
- Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
| | - Cheng Li
- Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
| | - Anlin Feng
- Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
| | - Yazhen Zhu
- Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
| | - Jing Wang
- Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
| | - Zhuoya Li
- Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
| | - Bingjiao Yin
- Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
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12
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Ba H, Collignon P, Inzouddine D, Tartière-Kesri L, Tartière J. The genetic contribution in the evaluation of cardiac patients in a non-university hospital. Archives of Cardiovascular Diseases Supplements 2017. [DOI: 10.1016/s1878-6480(17)30153-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Tuci G, Rossin A, Luconi L, Pham-Huu C, Cicchi S, Ba H, Giambastiani G. Pyridine-decorated carbon nanotubes as a metal-free heterogeneous catalyst for mild CO2 reduction to methanol with hydroboranes. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01772c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pyridine decorated multi-walled carbon nanotubes have been employed as heterogeneous metal-free catalysts for CO2 hydroboration to methyl borinate under mild conditions. Mechanistic insights have unveiled the non-innocent role of the nanotube carrier in the catalytic performance.
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Affiliation(s)
- G. Tuci
- Institute of Chemistry of OrganoMetallic Compounds
- ICCOM-CNR and Consorzio INSTM
- Florence
- Italy
| | - A. Rossin
- Institute of Chemistry of OrganoMetallic Compounds
- ICCOM-CNR and Consorzio INSTM
- Florence
- Italy
| | - L. Luconi
- Institute of Chemistry of OrganoMetallic Compounds
- ICCOM-CNR and Consorzio INSTM
- Florence
- Italy
| | - C. Pham-Huu
- Institut de Chimie et Procédés pour l'Energie
- l'Environnement et la Santé (ICPEES)
- UMR 7515 CNRS - University of Strasbourg
- 67087 Strasbourg Cedex 02
- France
| | - S. Cicchi
- Dipartimento di Chimica “Ugo Schiff”
- Università di Firenze
- Sesto Fiorentino
- Italy
| | - H. Ba
- Institut de Chimie et Procédés pour l'Energie
- l'Environnement et la Santé (ICPEES)
- UMR 7515 CNRS - University of Strasbourg
- 67087 Strasbourg Cedex 02
- France
| | - G. Giambastiani
- Institute of Chemistry of OrganoMetallic Compounds
- ICCOM-CNR and Consorzio INSTM
- Florence
- Italy
- Kazan Federal University
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14
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Mapoure YN, Ayeah CM, Doualla MS, Ba H, Ngahane HBM, Mbahe S, Luma HN. Serum Uric Acid Is Associated with Poor Outcome in Black Africans in the Acute Phase of Stroke. Stroke Res Treat 2017; 2017:1935136. [PMID: 29082062 PMCID: PMC5610810 DOI: 10.1155/2017/1935136] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 07/16/2017] [Accepted: 07/24/2017] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Prognostic significance of serum uric acid (SUA) in acute stroke still remains controversial. OBJECTIVES To determine the prevalence of hyperuricemia and its association with outcome of stroke patients in the Douala General Hospital (DGH). METHODS This was a hospital based prospective cohort study which included acute stroke patients with baseline SUA levels and 3-month poststroke follow-up data. Associations between high SUA levels and stroke outcomes were analyzed using multiple logistic regression and survival analysis (Cox regression and Kaplan-Meier). RESULTS A total of 701 acute stroke patients were included and the prevalence of hyperuricemia was 46.6% with a mean SUA level of 68.625 ± 24 mg/l. Elevated SUA after stroke was associated with death (OR = 2.067; 95% CI: 1.449-2.950; p < 0.001) but did not predict this issue. However, an independent association between increasing SUA concentration and mortality was noted in a Cox proportional hazards regression model (adjusted HR = 1.740; 95% CI: 1.305-2.320; p < 0.001). Furthermore, hyperuricemia was an independent predictor of poor functional outcome within 3 months after stroke (OR = 2.482; 95% CI: 1.399-4.404; p = 0.002). CONCLUSION The prevalence of hyperuricemia in black African stroke patients is quite high and still remains a predictor of poor outcome.
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Affiliation(s)
- Yacouba N. Mapoure
- 1Department of Clinical Sciences, University of Douala, Douala, Cameroon
- 2Department of Internal Medicine, Douala General Hospital, Douala, Cameroon
| | - Chia Mark Ayeah
- 2Department of Internal Medicine, Douala General Hospital, Douala, Cameroon
| | - M. S. Doualla
- 2Department of Internal Medicine, Douala General Hospital, Douala, Cameroon
- 3Department of Internal Medicine, University of Yaoundé I, Douala, Cameroon
| | - H. Ba
- 3Department of Internal Medicine, University of Yaoundé I, Douala, Cameroon
| | - Hugo B. Mbatchou Ngahane
- 1Department of Clinical Sciences, University of Douala, Douala, Cameroon
- 2Department of Internal Medicine, Douala General Hospital, Douala, Cameroon
| | - Salomon Mbahe
- 2Department of Internal Medicine, Douala General Hospital, Douala, Cameroon
| | - Henry N. Luma
- 2Department of Internal Medicine, Douala General Hospital, Douala, Cameroon
- 3Department of Internal Medicine, University of Yaoundé I, Douala, Cameroon
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15
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Ba H, Ahouidi AD, Duffy CW, Deh YB, Diedhiou C, Tandia A, Diallo MY, Assefa S, Lô BB, Elkory MB, Conway DJ. [Evaluation of malaria rapid diagnostic test Optimal-IT® pLDH along the Plasmodium falciparum distribution limit in Mauritania]. ACTA ACUST UNITED AC 2016; 110:31-37. [PMID: 28035638 DOI: 10.1007/s13149-017-0541-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 10/25/2016] [Indexed: 11/30/2022]
Abstract
Performance of the malaria Rapid Diagnostic Test (RDT) OptiMal-IT® was evaluated in Mauritania where malaria is low and dependent on a short transmission season. Slide microscopy was considered as the reference method of diagnosis. Febrile patients with suspected malaria were recruited from six health facilities, 3 urban and 3 rural, during two periods (December 2011 to February 2012, and August 2012 to March 2013). Overall, 780 patients were sampled, with RDT and thick blood film microscopy results being obtained for 759 of them. Out of 774 slides examined, of which 200 were positive, P. falciparum and P. vivax mono-infections were detected in 63.5% (127) and 29.5% (59), while P. falciparum/P. vivax coinfections were detected in 7% (14). Both species were observed in all study sites, although in significantly different proportions. The proportions of thick blood film and OptiMal-IT® RDT positive individuals was 26.3% and 30.3% respectively. Sensitivity and specificity of OptiMal-IT® RDT were 89% [95% CI, 84.7-93.3] and 91.1% [88.6-93.4]. Positives and negative predictive values were 78.1% [72.2-83.7] and 95.9% [94.1-97.5]. These diagnostic values are similar to those generally reported elsewhere, and support the use of RDTs as the main diagnostic tool for malaria in Mauritanian health facilities. In the future, choice of RDTs to be used must take account of thermostability in a hot, dry environment and their ability to detect P. falciparum and P. vivax.
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Affiliation(s)
- H Ba
- Institut national de recherche en santé publique (INRSP), BP 695, Nouakchott, Mauritanie.
| | - A D Ahouidi
- Hôpital Le Dantec, Université Cheikh Anta Diop, Dakar, Sénégal
| | - C W Duffy
- Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Y B Deh
- Institut national de recherche en santé publique (INRSP), BP 695, Nouakchott, Mauritanie
| | - C Diedhiou
- Hôpital Le Dantec, Université Cheikh Anta Diop, Dakar, Sénégal
| | - A Tandia
- Institut national de recherche en santé publique (INRSP), BP 695, Nouakchott, Mauritanie
| | - M Y Diallo
- Institut national de recherche en santé publique (INRSP), BP 695, Nouakchott, Mauritanie
| | - S Assefa
- Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - B B Lô
- Université des sciences et technologies médicales, Département de biologie, BP 880, Nouakchott, Mauritanie.,Direction de l'inspection générale, av. Gamel Abdel, BP 115, Nouakchott, Mauritanie
| | - M B Elkory
- Institut national de recherche en santé publique (INRSP), BP 695, Nouakchott, Mauritanie
| | - D J Conway
- Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
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16
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Yang P, Zhou W, Li C, Zhang M, Jiang Y, Jiang R, Ba H, Li C, Wang J, Yin B, Gong F, Li Z. Kupffer-cell-expressed transmembrane TNF-α is a major contributor to lipopolysaccharide and D-galactosamine-induced liver injury. Cell Tissue Res 2015; 363:371-83. [PMID: 26267221 DOI: 10.1007/s00441-015-2252-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Accepted: 06/11/2015] [Indexed: 12/22/2022]
Abstract
Tumor necrosis factor (TNF)-α exists in two bioactive forms, a 26-kDa transmembrane form (tmTNF-α) and a 17-kDa soluble form (sTNF-α). sTNF-α has been recognized as a key regulator of hepatitis; however, serum sTNF-α disappears in mice during the development of severe liver injury, and high levels of serum sTNF-α do not necessarily result in liver damage. Interestingly, in a mouse model of acute hepatitis, we have found that tmTNF-α expression on Kupffer cells (KCs) significantly increases when mice develop severe liver injury caused by lipopolysaccharide (LPS)/D-galactosamine (D-gal), and the level of tmTNF-α expression is positively related to the activity of serum transaminases. Therefore, we hypothesized that KC-expressed tmTNF-α constitutes a pathomechanism in hepatitis and have explored the role of tmTNF-α in this disease model. Here, we have compared the impact of KCs(tmTNFlow) and KCs(tmTNFhigh) on acute hepatitis in vivo and ex vivo and have further demonstrated that KCs(tmTNFhigh), rather than KCs(tmTNFlow), not only exhibit an imbalance in secretion of pro- and anti-inflammatory cytokines, favoring inflammatory response and exacerbating liver injury, but also induce hepatocellular apoptosis via tmTNF-α and the expression of another pro-apoptotic factor, Fas ligand. Our data suggest that KC(tmTNFhigh) is a major contributor to liver injury in LPS/D-gal-induced hepatitis.
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Affiliation(s)
- Peng Yang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Wenjing Zhou
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Chenxi Li
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Meng Zhang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Yaping Jiang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Rui Jiang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Hongping Ba
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Cheng Li
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Jing Wang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Bingjiao Yin
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Feili Gong
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China
| | - Zhuoya Li
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030, People's Republic of China.
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Coulibaly S, Diall I, Menta I, Diakité M, Ba H, Diakité S, Sibibé S, Sacko AK, Sidibé N, Sangaré I, Diallo B. [Risk factors and clinical aspects of myocardial infarction in patients younger than 40 years in the Point G Teaching Hospital]. Mali Med 2014; 29:38-42. [PMID: 30049114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A retrospective and analytical study was conducted, over 9 years, from January 2004 to December 2012. It included 10 inpatients and took place at the cardiology service of the Point G teaching hospital. Its goals were to assess cardiovascular risk factors, the delay between the clinical onset and admission and to describe ECG changes and echocardiographic changes of myocardial infarction in patients under 40 year-old. Young patients accounted for 6.8% of MI admissions with a male predominance of 90%. The disease frequency has increased with age, 40% were within 38-40 year-old range, the risk factors were predominantly smoking 80%, Stress 50%, High Blood Pressure 40% and dyslipidemia 20%. Typical chest pain was the most common recorded symptom. Anterior necrosis was the most common of electrical pattern, 8 out 10 times the ejection fraction was down and segmental kinetic was impaired in 60% of patients on echocardiography. Over 3 quarters of patients were admitted 12 hours after the onset of symptoms and the evolution during hospitalization was good with no fatality.
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Affiliation(s)
| | - I Diall
- service de cardiologie CHU Point G
| | - I Menta
- service de cardiologie CHU Gabriel Touré
| | | | - H Ba
- service de cardiologie CHU Gabriel Touré
| | | | - S Sibibé
- service de cardiologie CHU Point G
| | | | - N Sidibé
- service de cardiologie CHU Gabriel Touré
| | - I Sangaré
- service de cardiologie CHU Gabriel Touré
| | - B Diallo
- service de cardiologie CHU Point G
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18
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Zhang Z, Wu Y, Gao M, Zhang J, Kong Q, Liu Y, Ba H, Zhou J, Zhang Y. Disruption of PAMP-induced MAP kinase cascade by a Pseudomonas syringae effector activates plant immunity mediated by the NB-LRR protein SUMM2. Cell Host Microbe 2012; 11:253-63. [PMID: 22423965 DOI: 10.1016/j.chom.2012.01.015] [Citation(s) in RCA: 225] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 12/06/2011] [Accepted: 01/20/2012] [Indexed: 01/01/2023]
Abstract
Pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) serves as a primary plant defense response against microbial pathogens, with MEKK1, MKK1/MKK2, and MPK4 functioning as a MAP kinase cascade downstream of PAMP receptors. Plant Resistance (R) proteins sense specific pathogen effectors to initiate a second defense mechanism, termed effector-triggered immunity (ETI). In a screen for suppressors of the mkk1 mkk2 autoimmune phenotype, we identify the nucleotide-binding leucine-rich repeat (NB-LRR) protein SUMM2 and find that the MEKK1-MKK1/MKK2-MPK4 cascade negatively regulates SUMM2-mediated immunity. Further, the MEKK1-MKK1/MKK2-MPK4 cascade positively regulates basal defense targeted by the Pseudomonas syringae pathogenic effector HopAI1, which inhibits MPK4 kinase activity. Inactivation of MPK4 by HopAI1 results in activation of SUMM2-mediated defense responses. Our data suggest that SUMM2 is an R protein that becomes active when the MEKK1-MKK1/MKK2-MPK4 cascade is disrupted by pathogens, supporting the hypothesis that R proteins evolved to protect plants when microbial effectors suppress basal resistance.
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Affiliation(s)
- Zhibin Zhang
- National Institute of Biological Sciences, Zhongguancun Life Science Park, Beijing, People's Republic of China
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Cosson E, Hamo-Tchatchouang E, Banu I, Nguyen MT, Chiheb S, Ba H, Valensi P. A large proportion of prediabetes and diabetes goes undiagnosed when only fasting plasma glucose and/or HbA1c are measured in overweight or obese patients. Diabetes & Metabolism 2010; 36:312-8. [DOI: 10.1016/j.diabet.2010.02.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Revised: 02/24/2010] [Accepted: 02/26/2010] [Indexed: 11/27/2022]
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20
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Baylet R, Maffre E, Ba H, Dauchy S, Gueye T. [Sero-epidemiologic study of streptococcal infection in Dakar]. Bull Soc Med Afr Noire Lang Fr 1965; 10:526-530. [PMID: 5859600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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