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Xu X, Peng J, Wang N, Ocansey DKW, Zhang X, Mao F. hucMSC-Ex alleviates inflammatory bowel disease in mice by enhancing M2-type macrophage polarization via the METTL3-Slc37a2-YTHDF1 axis. Cell Biol Toxicol 2024; 40:74. [PMID: 39259386 PMCID: PMC11390928 DOI: 10.1007/s10565-024-09921-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 09/04/2024] [Indexed: 09/13/2024]
Abstract
Human umbilical cord mesenchymal stem cell-derived exosomes (hucMSC-Ex) have emerged as a new treatment strategy for inflammatory bowel disease (IBD) due to their immunoregulatory function. N6-methyladenosine (m6A) plays a crucial role in regulating intestinal immunity, especially in IBD where macrophages play an important role, although its mechanism is not yet fully understood. From this perspective, this research aimed to evaluate the effect of hucMSC-Ex on m6A modification of macrophages in IBD. In the process of alleviating inflammation, hucMSC-Ex promotes macrophage polarization toward the M2 type and regulates intracellular m6A levels by upregulating the expression of m6A "Writer" METTL3 and "Reader" YTHDF1. Solute Carrier Family 37 Member 2 (Slc37a2) was identified by Methylation RNA immunoprecipitation sequencing as the target molecule of the hucMSC-Ex. Mechanically, hucMSC-Ex promoted the binding of METTL3 to the Slc37a2 mRNA complex, and enhanced the binding of Slc37a2 to YTHDF1 to upregulate the intracellular expression of Slc37a2, thereby attenuating the pro-inflammatory function of macrophage. This study confirms the modulatory role of hucMSC-Ex on the m6A modification of macrophages in IBD, providing a new scientific basis for the treatment of IBD with hucMSC-Ex.
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Affiliation(s)
- Xinwei Xu
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, 212013, P.R. China
- Department of Laboratory Medicine, Lianyungang Clinical College, Jiangsu University, Lianyungang, 222006, Jiangsu, P.R. China
- Clinical Laboratory, Xuzhou Central Hospital, 199 Jiefang South Road, Xuzhou, 221000, Jiangsu, China
| | - Jianhua Peng
- The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, Zhenjiang, 212300, Jiangsu, P.R. China
| | - Naijian Wang
- Department of Laboratory Medicine, Lianyungang Clinical College, Jiangsu University, Lianyungang, 222006, Jiangsu, P.R. China
| | - Dickson Kofi Wiredu Ocansey
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, 212013, P.R. China
- Department of Medical Laboratory Science, School of Allied Health Sciences, College of Health and Allied Sciences, University of Cape Coast, CC0959347, Cape Coast, Ghana
| | - Xu Zhang
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, 212013, P.R. China
| | - Fei Mao
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, 212013, P.R. China.
- Department of Laboratory Medicine, Lianyungang Clinical College, Jiangsu University, Lianyungang, 222006, Jiangsu, P.R. China.
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Abstract
Asplenia (the congenital or acquired absence of the spleen) and hyposplenism (defective spleen function) are common causes of morbidity and mortality. The spleen is a secondary lymphoid organ that is responsible for the regulation of immune responses and blood filtration. Hence, asplenia or hyposplenism increases susceptibility to severe and invasive infections, especially those sustained by encapsulated bacteria (namely, Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae type b). Asplenia is predominantly due to splenectomy for either traumatic events or oncohaematological conditions. Hyposplenism can be caused by several conditions, including haematological, infectious, autoimmune and gastrointestinal disorders. Anatomical disruption of the spleen and depletion of immune cells, especially IgM memory B cells, seem to be predominantly responsible for the clinical manifestations. Early recognition of hyposplenism and proper management of asplenia are warranted to prevent overwhelming post-splenectomy infections through vaccination and antibiotic prophylaxis. Although recommendations are available, the implementation of vaccination strategies, including more effective and immunogenic vaccines, is needed. Additionally, screening programmes for early detection of hyposplenism in high-risk patients and improvement of patient education are warranted.
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Pu D, Liu L, Wang N, Wang D, Zhang Z, Feng B. Case report: Single-cell mapping of peripheral blood mononuclear cells from a patient with both Crohn’s disease and isolated congenital asplenia. Front Immunol 2022; 13:959281. [PMID: 36091029 PMCID: PMC9459022 DOI: 10.3389/fimmu.2022.959281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 08/03/2022] [Indexed: 11/18/2022] Open
Abstract
Crohn’s disease (CD), as one of the principal form of inflammatory bowel disease (IBD), is characterized by the chronic and recurring inflammatory conditions in the intestine resulting from the over-activation of intestinal immunity. Hyposplenism is strongly associated with CD, while the effect of human spleen on the differentiation and development of immune cell subsets in CD patients remains unclear. Isolated congenital asplenia (ICA) is an extremely rare condition characterized by the absence of a spleen at birth without any other developmental defects. Here, we describe the first case of a patient with both ICA and CD, and follow the progression of CD from remission to active stage. Using cytometry by time of flight (CyTOF) analysis, we draw the first single-cell mapping of peripheral blood mononuclear cells (PBMC) from this unique patient, tracing back to the innate or adaptive immune cell subsets and cell surface markers affected by the spleen. Based on our analysis, it is speculated that the spleen contributes to maintaining immune homeostasis, alleviating intestinal inflammation and improving prognosis by influencing the differentiation and development of peripheral immune cell subsets and the expression of cell surface markers in patients with CD.
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Affiliation(s)
- Dan Pu
- Department of Gastroenterology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Lu Liu
- Department of Gastroenterology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Na Wang
- Department of Microbiology and Immunology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Dandan Wang
- Department of Gastroenterology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhe Zhang
- Department of Gastroenterology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- *Correspondence: Zhe Zhang, ; Baisui Feng,
| | - Baisui Feng
- Department of Gastroenterology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- *Correspondence: Zhe Zhang, ; Baisui Feng,
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Yasmeen N, Etienne M, Sharma PS, El-Kirat-Chatel S, Helú MB, Kutner W. Molecularly imprinted polymer as a synthetic receptor mimic for capacitive impedimetric selective recognition of Escherichia coli K-12. Anal Chim Acta 2021; 1188:339177. [PMID: 34794582 DOI: 10.1016/j.aca.2021.339177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 10/02/2021] [Accepted: 10/13/2021] [Indexed: 11/28/2022]
Abstract
We fabricated an electrochemical molecularly imprinted polymer (MIP) chemosensor for rapid identification and quantification of E. coli strain using 2-aminophenyl boronic acid as the functional monomer. This strain is a modified Gram-negative strain of Escherichia coli bacterium, an ordinary human gut component. The E. coli strongly interacts with a boronic acid because of porous and flexible polymers of the cell wall. The SEM imaging showed that the bacteria template was partially entrapped within the polymeric matrix in a single step. Moreover, this imaging confirmed E. coli K-12 cell template extraction effectiveness. The prepared MIP determined the E. coli K-12 strain up to 2.9 × 104 cells mL-1. The interference study performed in the presence of E. coli variants expressing different surface appendages (type 1 fimbriae or Antigen 43 protein) or Shewanella oneidensis MR1, another Gram-negative bacteria, demonstrated that the bacterial surface composition notably impacts sensing properties of the bacteria imprinted polymer.
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Affiliation(s)
- Nabila Yasmeen
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Mathieu Etienne
- Université de Lorraine, CNRS, LCPME, F-54000, Nancy, France.
| | - Piyush Sindhu Sharma
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.
| | | | | | - Wlodzimierz Kutner
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland; Faculty of Mathematics and Natural Sciences, School of Sciences, Institute of Chemical Sciences, Cardinal Stefan Wyszynski University in Warsaw, Wóycickiego 1/3, 01-815, Warsaw, Poland
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Mathur A, McLean MH, Cao H, Vickers MA. Hyposplenism and Gastrointestinal Diseases: Significance and Mechanisms. Dig Dis 2021; 40:290-298. [PMID: 34034254 DOI: 10.1159/000517338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/10/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Functional hyposplenism is a recognized complication of several gastroenterological disorders, including coeliac and inflammatory bowel diseases, and is believed to contribute to the increased infection risk seen in these disorders. SUMMARY The mechanisms of hyposplenism are poorly understood. In this article, we review possible mechanisms underlying development of functional hyposplenism and discuss implications for its management. KEY MESSAGES Identifying functional hyposplenism is important, as it may permit earlier recognition and treatment of serious infections through patient education and vaccination.
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Affiliation(s)
- Abhinav Mathur
- Infection, Immunity and Inflammation, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Mairi H McLean
- Division of Molecular and Cellular Medicine, School of Medicine, University of Dundee, Dundee, United Kingdom
| | - Huan Cao
- Infection, Immunity and Inflammation, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Mark A Vickers
- Infection, Immunity and Inflammation, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
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Barbalho SM, Matias JN, Flato UAP, Pilon JPG, Bitelli P, Pagani Junior MA, de Carvalho ACA, Haber JFDS, Reis CHB, Goulart RDA. What Do Influenza and COVID-19 Represent for Patients With Inflammatory Bowel Disease? Gastroenterology Res 2021; 14:1-12. [PMID: 33737994 PMCID: PMC7935616 DOI: 10.14740/gr1358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 01/14/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Inflammatory bowel diseases (IBD) are a group of immune and inflammatory diseases; and patients seem to be more vulnerable to influenza and coronavirus disease 2019 (COVID-19). These conditions are characterized by the augmented release of inflammatory cytokines that have been suggested as potential triggers for the acute respiratory distress syndrome, which may favor severe and even fatal outcomes. For these reasons, this review aims to evaluate what influenza and COVID-19 may represent for patients with IBD. METHODS The search was performed in MEDLINE/PubMed, EMBASE, and Cochrane databases. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed to build the review. RESULTS The conventional therapies used by IBD patients may also interfere in the outcomes of influenza and COVID-19. Immune-suppressors agents are associated with a higher risk of infections due to the inhibition of intracellular signals necessary to the host act against pathogens. On the other hand, drugs related to the suppression of the production of cytokines in IBD could bring benefits to reduce mucosal inflammation, and for preventing pneumonia. Moreover, coronaviruses can bind to the target cells through angiotensin-converting enzyme 2 (ACE-2) receptor that is expressed in epithelial cells of the lung and largely the colon and the terminal ileum suggesting that human intestinal tract could be an alternative route for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). CONCLUSIONS Once the cytokine storm observed in influenza and COVID-19 is similar to the cytokine pattern observed in IBD patients during the disease flares, the advice is that avoiding the infections is still an optimal option for IBD subjects.
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Affiliation(s)
- Sandra Maria Barbalho
- Department of Biochemistry and Pharmacology, School of Medicine, University of Marilia (UNIMAR), Avenida Higino Muzzi Filho, 1001, Marilia, Sao Paulo, Brazil
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, UNIMAR, Marilia, SP, Brazil
- School of Food and Technology of Marilia (FATEC), Marilia, SP, Brazil
| | - Julia Novaes Matias
- Department of Biochemistry and Pharmacology, School of Medicine, University of Marilia (UNIMAR), Avenida Higino Muzzi Filho, 1001, Marilia, Sao Paulo, Brazil
| | - Uri Adrian Prync Flato
- Department of Biochemistry and Pharmacology, School of Medicine, University of Marilia (UNIMAR), Avenida Higino Muzzi Filho, 1001, Marilia, Sao Paulo, Brazil
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, UNIMAR, Marilia, SP, Brazil
| | - Joao Paulo Galletti Pilon
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, UNIMAR, Marilia, SP, Brazil
| | - Piero Bitelli
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, UNIMAR, Marilia, SP, Brazil
| | | | | | - Jesselina Francisco dos Santos Haber
- Department of Biochemistry and Pharmacology, School of Medicine, University of Marilia (UNIMAR), Avenida Higino Muzzi Filho, 1001, Marilia, Sao Paulo, Brazil
| | | | - Ricardo de Alvares Goulart
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, UNIMAR, Marilia, SP, Brazil
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