Mast cells positive for cluster of differentiation 117 protein: are they players or conductor in the orchestra of cholesteatoma?
Summary of "Mast cells positive for cluster of differentiation 117 protein: are they players or conductor in the orchestra of cholesteatoma?"
Background:The pathogenesis of cholesteatoma remains unclear, despite several theories. Alterations in the density of mast cells positive for cluster of differentiation 117 protein (also known as CD117) can be critical to cholesteatoma formation, due to the effect on keratinocyte growth factor production. This study aimed to investigate the potential role of these mast cells in cholesteatoma pathogenesis.Methods:The number and density of mast cells positive for cluster of differentiation 117 protein were immunohistochemically analysed in 52 patients: 22 with chronic otitis media alone (group one), 25 with chronic otitis media with cholesteatoma (group two) and five controls.Results:The number of these mast cells was much higher in group two (in cholesteatoma matrix tissue) than in group one (in chronic otitis media granulation tissue) or the controls (in normal post-auricular skin). The density of these mast cells was significantly greater in group two than in group one or the controls (p < 0.05). The number and density of these mast cells was much greater in group one than in controls (p < 0.01).Conclusion:Mast cells positive for cluster of differentiation 117 protein could play a role in cholesteatoma formation. Further investigation of the role of these mast cells in cholesteatoma may suggest new ways of addressing this disorder, and may enable the development of targeted treatments.
Department of Pathology, Izmir Training and Research Hospital, Turkey.
This article was published in the following journal.
Name: The Journal of laryngology and otology
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22697111
- DOI: http://dx.doi.org/10.1017/S0022215112001181
Medical and Biotech [MESH] Definitions
Granulated cells that are found in almost all tissues, most abundantly in the skin and the gastrointestinal tract. Like the BASOPHILS, mast cells contain large amounts of HISTAMINE and HEPARIN. Unlike basophils, mast cells normally remain in the tissues and do not circulate in the blood. Mast cells, derived from the bone marrow stem cells, are regulated by the STEM CELL FACTOR.
A multifunctional cytokine secreted by primarily by activated TH2 CELLS that may play a role as a regulator of allergic INFLAMMATION. It has been shown to enhance the growth and CELL DIFFERENTIATION of MAST CELLS, and can act on a variety of other immune cells.
A form of systemic mastocytosis (MASTOCYTOSIS, SYSTEMIC) characterized by the presence of large numbers of tissue MAST CELLS in the peripheral blood without skin lesions. It is a high-grade LEUKEMIA disease with bone marrow smear of >20% MAST CELLS, multi-organ failure and a short survival.
Differentiation antigens residing on mammalian leukocytes. CD stands for cluster of differentiation, which refers to groups of monoclonal antibodies that show similar reactivity with certain subpopulations of antigens of a particular lineage or differentiation stage. The subpopulations of antigens are also known by the same CD designation.
A soluble factor produced by activated T-LYMPHOCYTES that induces the expression of MHC CLASS II GENES and FC RECEPTORS on B-LYMPHOCYTES and causes their proliferation and differentiation. It also acts on T-lymphocytes, MAST CELLS, and several other hematopoietic lineage cells.
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