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      1. Author :
        Rao, S. M.; Auger, J. L.; Gaillard, P.; Weissleder, R.; Wada, E.; Torres, R.; Kojima, M.; Benoist, C.; Mathis, D.; Binstadt, B. A.
      2. Title :
      3. Type :
        Journal Article
      4. Year :
        2012
      5. Publication :
        Arthritis Res Ther
      6. Products :
      7. Volume :
        14
      8. Issue :
        N/A
      9. Page Numbers :
        N/A
      10. Research Area :
        N/A
      11. Keywords :
        AngioSense, Animals; Arthritis/genetics/*immunology/metabolism; Autoantibodies/*immunology; Bone Marrow Cells/immunology/metabolism/pathology; Calcium/immunology/metabolism; Female; Male; Mast Cells/immunology/metabolism/pathology; Mice; Mice, Inbred C57BL; Mice, Inbred NOD; Mice, Knockout; Mice, Transgenic; Neuropeptides/deficiency/genetics/*immunology; Protein Isoforms/deficiency/genetics/immunology; Receptors, Neurotensin/deficiency/genetics/immunology; Receptors, Neurotransmitter/deficiency/genetics/*immunology; Spleen/immunology/metabolism/pathology
      12. Abstract :
        INTRODUCTION: Neuromedin U (NMU) is a neuropeptide with pro-inflammatory activity. The primary goal of this study was to determine if NMU promotes autoantibody-induced arthritis. Additional studies addressed the cellular source of NMU and sought to define the NMU receptor responsible for its pro-inflammatory effects. METHODS: Serum containing arthritogenic autoantibodies from K/BxN mice was used to induce arthritis in mice genetically lacking NMU. Parallel experiments examined whether NMU deficiency impacted the early mast-cell-dependent vascular leak response induced by these autoantibodies. Bone-marrow chimeric mice were generated to determine whether pro-inflammatory NMU is derived from hematopoietic cells or stromal cells. Mice lacking the known NMU receptors singly and in combination were used to determine susceptibility to serum-transferred arthritis and in vitro cellular responses to NMU. RESULTS: NMU-deficient mice developed less severe arthritis than control mice. Vascular leak was not affected by NMU deficiency. NMU expression by bone-marrow-derived cells mediated the pro-arthritogenic effect. Deficiency of all of the known NMU receptors, however, had no impact on arthritis severity and did not affect the ability of NMU to stimulate intracellular calcium flux. CONCLUSIONS: NMU-deficient mice are protected from developing autoantibody-induced inflammatory arthritis. NMU derived from hematopoietic cells, not neurons, promotes the development of autoantibody-induced inflammatory arthritis. This effect is mediated by a receptor other than the currently known NMU receptors.
      13. URL :
        http://www.ncbi.nlm.nih.gov/pubmed/22314006
      14. Call Number :
        PKI @ kd.modi @ 13
      15. Serial :
        10438
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