Abstract:
:Endosialin emerged recently as a potential therapeutic target for sarcoma. Since some sarcoma subtypes, such as Ewing's sarcoma, show characteristics of neuroendocrine differentiation, we wondered whether cancers with neuro-endocrine properties and/or neuroectodermal origin, such as neuroblastoma, small cell lung cancer and melanoma, may express endosialin. Endosialin protein expression was surveyed in neuroblastoma, small cell lung cancer and melanoma in human clinical specimens by immunohistochemistry (IHC) and in human cell lines by flow cytometry. Side population cells were examined to determine whether cancer stem cells can express endosialin. Endosialin-expressing neuroblastoma cell lines were implanted in immunodeficient mice and allowed to grow. The xenograft tumors were resected and tested for endosialin expression by IHC. In human clinical specimens, vascular endosialin staining was observed in neuroblastoma, small cell lung cancer and melanoma. Malignant cell staining was strongest in neuroblastoma, weak in melanoma and rare in small cell lung cancer. In human cell lines, endosialin was detected in neuroblastoma cell lines, including cancer stem cell-like side population (SP) cells, but was absent in melanoma and was both rare and weak in small cell lung cancer. Human neuroblastoma xenograft tumors were found to be positive for endosialin. Our work suggests that endosialin may be a suitable therapeutic target for neuroblastoma.
journal_name
Int J Oncoljournal_title
International journal of oncologyauthors
Rouleau C,Smale R,Sancho J,Fu YS,Kurtzberg L,Weber W,Kruger A,Jones C,Roth S,Bormann C,Dunham S,Krumbholz R,Curiel M,Wallar G,Mascarello J,Campos-Rivera J,Horten B,Schmid S,Miller G,Teicher BAdoi
10.3892/ijo.2011.1091subject
Has Abstractpub_date
2011-10-01 00:00:00pages
841-51issue
4eissn
1019-6439issn
1791-2423journal_volume
39pub_type
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