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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ma, Ying Weis, John H. Weis, Janis J. Mock, Kelton Teuscher, Cory Bramwell, Kenneth K. C. |
| Description | Author Affiliation: Bramwell KK ( Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112); Mock K ( University of Puget Sound, Tacoma, WA 98416); Ma Y ( Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112); Weis JH ( Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112); Teuscher C ( Department of Medicine, University of Vermont, Burlington, VT 05405.); Weis JJ ( Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, UT 84112) |
| Abstract | The lysosomal enzyme ß-glucuronidase (Gusb) is a key regulator of Lyme-associated and K/B×N-induced arthritis severity. The luminal enzymes present in lysosomes provide essential catabolic functions for the homeostatic degradation of a variety of macromolecules. In addition to this essential catabolic function, lysosomes play important roles in the inflammatory response following infection. Secretory lysosomes and related vesicles can participate in the inflammatory response through fusion with the plasma membrane and release of bioactive contents into the extracellular milieu. In this study, we show that GUSB hypomorphism potentiates lysosomal exocytosis following inflammatory stimulation. This leads to elevated secretion of lysosomal contents, including glycosaminoglycans, lysosomal hydrolases, and matrix metalloproteinase 9, a known modulator of Lyme arthritis severity. This mechanistic insight led us to test the efficacy of rapamycin, a drug known to suppress lysosomal exocytosis. Both Lyme and K/B×N-associated arthritis were suppressed by this treatment concurrent with reduced lysosomal release. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1500212 |
| Journal | The Journal of Immunology |
| Issue Number | 4 |
| Volume Number | 195 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2015-08-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Glucuronidase Metabolism Lyme Disease Lysosomes Matrix Metalloproteinase 9 Animals Cell Membrane Disease Models, Animal Exocytosis Drug Effects Immunology Deficiency Genetics Immunosuppressive Agents Pharmacology Drug Therapy Pathology Lysosomal-associated Membrane Protein 1 Macrophages Ultrastructure Mice Mice, Knockout Models, Biological Protein Transport Sirolimus Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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