TY  - JOUR
AU  - Sandén, Emma
AU  - Dyberg, Cecilia
AU  - Krona, Cecilia
AU  - Visse, Edward
AU  - Carén, Helena
AU  - Northcott, Paul A
AU  - Kool, Marcel
AU  - Ståhl, Nils
AU  - Persson, Annette
AU  - Englund, Elisabet
AU  - Johnsen, John I
AU  - Siesjö, Peter
AU  - Darabi, Anna
TI  - Aberrant immunostaining pattern of the CD24 glycoprotein in clinical samples and experimental models of pediatric medulloblastomas.
JO  - Journal of neuro-oncology
VL  - 123
IS  - 1
SN  - 1573-7373
CY  - Dordrecht [u.a.]
PB  - Springer Science + Business Media B.V
M1  - DKFZ-2017-03460
SP  - 1 - 13
PY  - 2015
AB  - The CD24 glycoprotein is a mediator of neuronal proliferation, differentiation and immune suppression in the normal CNS, and a proposed cancer biomarker in multiple peripheral tumor types. We performed a comparative analysis of CD24 gene expression in a large cohort of pediatric and adult brain tumors (n = 813), and further characterized protein expression in tissue sections (n = 39), primary brain tumor cultures (n = 12) and a novel orthotopic group 3 medulloblastoma xenograft model. Increased CD24 gene expression was demonstrated in ependymomas, medulloblastomas, anaplastic astrocytomas and glioblastomas, although medulloblastomas displayed higher expression than all other tumor entities. Preferential expression of CD24 in medulloblastomas was confirmed at protein level by immunostaining and computerized image analysis of cryosections. Morphologies and immunophenotyping of CD24(+) cells in tissue sections tentatively suggested disparate functions in different tumor subsets. Notably, protein staining of medulloblastoma cells was associated with prominent cytoplasmic and membranous granules, enabling rapid and robust identification of medulloblastoma cells in clinical tissue samples, as well as in experimental model systems. In conclusion, our results implicate CD24 as a clinically and experimentally useful medulloblastoma immunomarker. Although our results encourage further functional studies of CD24 as a potential molecular target in subsets of brain tumors, the promiscuous expression of CD24 in vivo highlights the importance of specificity in the future design of such targeted treatment.
KW  - Antigens, CD24 (NLM Chemicals)
KW  - Biomarkers, Tumor (NLM Chemicals)
KW  - CD24 protein, human (NLM Chemicals)
LB  - PUB:(DE-HGF)16
C6  - pmid:25820321
DO  - DOI:10.1007/s11060-015-1758-5
UR  - https://inrepo02.dkfz.de/record/127437
ER  -