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Alkaline sphingomye...
Alkaline sphingomyelinase (NPP7) impacts the homeostasis of intestinal T lymphocyte populations
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- Alyamani, Manar (författare)
- Lund University,Lunds universitet,Adaptivt immunförsvar,Forskargrupper vid Lunds universitet,Luftvägsinflammation,Adaptive Immunity,Lund University Research Groups,Airway Inflammation and Immunology
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- Kadivar, Mohammad (författare)
- Lund University,Lunds universitet,Adaptivt immunförsvar,Forskargrupper vid Lunds universitet,Adaptive Immunity,Lund University Research Groups,Technical University of Denmark
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- Erjefält, Jonas (författare)
- Lund University,Lunds universitet,Luftvägsinflammation,Forskargrupper vid Lunds universitet,DCD transplantation av lungor,Airway Inflammation and Immunology,Lund University Research Groups,DCD transplantation of lungs
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- Johansson-Lindbom, Bengt (författare)
- Lund University,Lunds universitet,Adaptivt immunförsvar,Forskargrupper vid Lunds universitet,LUCC: Lunds universitets cancercentrum,Övriga starka forskningsmiljöer,Adaptive Immunity,Lund University Research Groups,LUCC: Lund University Cancer Centre,Other Strong Research Environments
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- Duan, Rui Dong (författare)
- Lund University,Lunds universitet,Medicin/akutsjukvård, Lund,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Gastro,Forskargrupper vid Lunds universitet,Medicine, Lund,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine,Lund University Research Groups
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- Nilsson, Åke (författare)
- Lund University,Lunds universitet,Medicin/akutsjukvård, Lund,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Gastro,Forskargrupper vid Lunds universitet,Medicine, Lund,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine,Lund University Research Groups,Skåne University Hospital
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- Marsal, Jan (författare)
- Lund University,Lunds universitet,Adaptivt immunförsvar,Forskargrupper vid Lunds universitet,Medicin/akutsjukvård, Lund,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Gastro,Adaptive Immunity,Lund University Research Groups,Medicine, Lund,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine,Skåne University Hospital
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(creator_code:org_t)
- 2023-01-19
- 2023
- Engelska.
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Ingår i: Frontiers in Immunology. - : Frontiers Media SA. - 1664-3224. ; 13
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://lup.lub.lu.s...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Background and aim: Alkaline sphingomyelinase (NPP7) is expressed by intestinal epithelial cells and is crucial for the digestion of dietary sphingomyelin. NPP7 also inactivates proinflammatory mediators including platelet-activating factor and lysophosphatidylcholine. The aim of this study was to examine a potential role for NPP7 in the homeostasis of the intestinal immune system. Methods: We quantified the numbers of B-lymphocytes, plasma cells, T-lymphocytes including regulatory T-lymphocytes (Tregs), natural killer cells, dendritic cells, macrophages, and neutrophils, in the small and large intestines, the mesenteric lymph nodes and the spleens of heterozygous and homozygous NPP7 knockout (KO) and wildtype (WT) mice. Tissues were examined by immunohistochemistry and stainings quantified using computerized image analysis. Results: The numbers of both small and large intestinal CD3ε+, CD4+, and CD8α+ T-lymphocytes were significantly higher in NPP7 KO compared to WT mice (with a dose-response relationship in the large intestine), whereas Treg numbers were unchanged, and dendritic cell numbers reduced. In contrast, the numbers of CD3ε+ and CD4+ T-lymphocytes in mesenteric lymph nodes were significantly reduced in NPP7 KO mice, while no differences were observed in spleens. The numbers of B-lymphocytes, plasma cells, natural killer cells, macrophages, and neutrophils were similar between genotypes. Conclusion: NPP7 contributes to the regulation of dendritic cell and T-lymphocyte numbers in mesenteric lymph nodes and both the small and large intestines, thus playing a role in the homeostasis of gut immunity. Although it is likely that the downstream effects of NPP7 activity involve the sphingomyelin metabolites ceramide and spingosine-1-phosphate, the exact mechanisms behind this regulatory function of NPP7 need to be addressed in future studies.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Immunologi inom det medicinska området (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Immunology in the medical area (hsv//eng)
Nyckelord
- alkaline sphingomyelinase
- inflammatory bowel disease
- intestine
- knockout
- lymphocytes
- NPP7
- S1P
- T-cells
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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