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2015 ; 10
(10
): e0141624
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English Wikipedia
Mincle, an Innate Immune Receptor, Is Expressed in Urothelial Cancer Cells of
Papillomavirus-Associated Urothelial Tumors of Cattle
#MMPMID26513724
Roperto S
; Russo V
; Esposito I
; Ceccarelli DM
; Paciello O
; Avallone L
; Capparelli R
; Roperto F
PLoS One
2015[]; 10
(10
): e0141624
PMID26513724
show ga
BACKGROUND: Mincle, macrophage-inducible C-type lectin, is a member of C-type
lectin receptors. It plays an important role in anti-mycobacterial and
anti-fungal immunity. Furthermore it senses dead cells through its primary ligand
SAP130. MATERIALS AND FINDINGS: We examined ten urothelial tumors of the urinary
bladder of cattle. Eight of them expressed E5 cDNA of bovine papillomaviruses
type 2 (BPV-2) and type 13 (BPV-13) that belong to Deltapapillomavirus genus. Two
of them were not examined for detection of E5 cDNA. Mincle expression appeared to
occur in urothelial neoplastic cells only. No mincle expression was detected in
urothelial cells from healthy cattle. Mincle expression was characterized by a
membranous pattern in papillary urothelial cancers; isolated and/or clustered
urothelial cells showing a strong cytoplasmic immunoreactivity were primarily
seen in invasive urothelial cancers. CONCLUSION: This is the first study about
the expression of mincle in veterinary oncology and the first report which
describes the expression of functional mincle receptor in neoplastic cells in
medical literature. As it has been shown that urothelial cancer cells have the
ability to function as antigen-presenting cells (APCs), it is conceivable that
mincle expression is involved in the presentation of cancer cell antigens to
cells of the immune system. Furthermore, since expression of mincle contributes
to the control of Mycobacterium bovis BCG infection, this study has exciting
clinical implications in comparative medicine keeping in mind that Bacillus
Calmette-Guérin (BCG) immunotherapy is currently the most effective treatment of
non-muscle invasive bladder cancer in man. Mincle expression in urothelial tumor
cells warrants further study to better understand the role, if any, of this
receptor in bladder cancer. Future studies will provide insights in the role of
mincle receptor of urothelial cancer cells in antitumor immunotherapy.