Murine mast cells synthesize basement membrane components. A potential role in early fibrosis.

H L Thompson; P D Burbelo; G Gabriel; Y Yamada; D D Metcalfe

doi:10.1172/JCI115038

Mast Cell Physiology Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892.

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Mast Cell Physiology Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892.

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Mast Cell Physiology Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892.

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Mast Cell Physiology Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892.

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Mast Cell Physiology Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892.

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Published in Volume 87, Issue 2 on February 1, 1991
J Clin Invest. 1991;87(2):619–623. https://doi.org/10.1172/JCI115038.
© 1991 The American Society for Clinical Investigation

Published February 1, 1991 - Version history

Mast cells are resident in tissues, particularly in association with endothelial and epithelial cell basement membranes, and increase at sites of inflammation, injury, and fibrosis. Although mast cells are known to both release and generate proinflammatory molecules in response to inflammatory stimuli, little is known about their normal biologic function. Here we demonstrate that IL-3-dependent mouse PT18 mast cells, mouse bone marrow-derived mast cells, and rat basophilic leukemia cells express large amounts of mRNA for collagen IV, laminin, and heparan sulfate proteoglycan. Western blot analysis confirmed that mast cells synthesize and secrete significant amounts collagen IV and laminin B1 and B2 chains. These data suggest that mast cells may contribute to normal tissue repair and/or the early overproduction of basement membrane components seen in a variety of fibrotic conditions.

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