| Amyloid Precursor Protein Expression Modulates Intestine Immune Phenotype. | |
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MedLine Citation:
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PMID: 22124967 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Amyloid precursor protein (APP) is widely expressed across many tissue and cell types. Proteolytic processing of the protein gives rise to a plethora of protein fragments with varied biological activities. Although a large amount of data has been generated describing the metabolism of the protein in neurons, its role in regulating the phenotype of other cells remains unclear. Based upon prior work demonstrating that APP regulates the activation phenotype of monocytic lineage cells, we hypothesized that APP can regulate macrophage activation phenotype in tissues other than brain. Ileums of the small intestines from C57BL6/J wild type and APP(-/-) mice were compared as a representative tissue normally associated with abundant macrophage infiltration. APP(-/-) intestines demonstrated diminished CD68 immunoreactivity compared to wild type mice. This correlated with significantly less cyclooxygenase-2 (cox-2), CD68, CD40, CD11c, and βIII-tubulin protein levels. Peritoneal macrophages from APP(-/-) mice demonstrated decreased in vitro migratory ability compared to wild type cells and diminished basal KC cytokine secretion. Whereas, APP(-/-) intestinal macrophages had an increase in basal KC cytokine secretion compared to wild type cells. Conversely, there was a significant decrease in multiple cytokine levels in APP(-/-) compared to wild type ileums. Finally, APP(-/-) mice demonstrated impaired absorption and increased motility compared to wild type mice. These data demonstrate the APP expression regulates immune cell secretions and phenotype and intestinal function. This data set describes a novel function for this protein or its metabolites that may be relevant not only for Alzheimer's disease but a range of immune-related disorders. |
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Authors:
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Kendra L Puig; Adam J Swigost; Xudong Zhou; Mary Ann Sens; Colin K Combs |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-29 |
Journal Detail:
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Title: Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology Volume: - ISSN: 1557-1904 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-29 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101256586 Medline TA: J Neuroimmune Pharmacol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Pharmacology, Physiology and Therapeutics, University of North Dakota School of Medicine and Health Sciences, 504 Hamline Street, Neuroscience Building, Grand Forks, ND, 58203, USA, kpuig@medicine.nodak.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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