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The tumour-associated carbonic anhydrases CA II, CA IX and CA XII in a group of medulloblastomas and supratentorial primitive neuroectodermal tumours: an association of CA IX with poor prognosis.

Nordfors K, Haapasalo J, Korja M, Niemelä A, Laine J, Parkkila AK, Pastorekova S, Pastorek J, Waheed A, Sly WS, Parkkila S, Haapasalo H - BMC Cancer (2010)

Bottom Line: Medulloblastomas (MBs) and supratentorial primitive neuroectodermal tumours (PNETs) are the most common highly aggressive paediatric brain tumours.Importantly, CA IX expression predicted poor prognosis in both univariate (p = 0.041) and multivariate analyses (p = 0.016).We suggest that CA IX should be considered a potential prognostic and therapeutic target in MBs and PNETs.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Pathology, Tampere University Hospital, Tampere, Finland. kristiina.nordfors@gmail.com

ABSTRACT

Background: Medulloblastomas (MBs) and supratentorial primitive neuroectodermal tumours (PNETs) are the most common highly aggressive paediatric brain tumours. In spite of extensive research on these tumours, there are only few known biomarkers or therapeutic target proteins, and the prognosis of patients with these tumours remains poor. Our aim was to investigate whether carbonic anhydrases (CAs), enzymes commonly overexpressed in various tumours including glioblastomas and oligodendrogliomas, are present in MBs and PNETs, and whether their expression can be correlated with patient prognosis.

Methods: We determined the expression of the tumour-associated carbonic anhydrases CA II, CA IX and CA XII in a series of MB/PNET specimens (n = 39) using immunohistochemistry.

Results: Endothelial CA II, cytoplasmic CA II, CA IX and CA XII were expressed in 49%, 73%, 23% and 11% of the tumours, respectively. CA II was detected in the neovessel endothelium and the tumour cell cytoplasm. CA IX was mainly expressed in the tumour cells located in perinecrotic areas. CA XII showed the most homogenous distribution within the tumours. Importantly, CA IX expression predicted poor prognosis in both univariate (p = 0.041) and multivariate analyses (p = 0.016).

Conclusions: We suggest that CA IX should be considered a potential prognostic and therapeutic target in MBs and PNETs.

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Representative immunostaining of CA enzymes in MBs. Panel A shows no immunoreaction for CA IX, whereas the tumour in panel B is strongly positive. Panel C demonstrates CA XII-positive immunoreactivity in tumour cells. In panel D, CA II-positive immunostaining is confined to the endothelium of small blood vessels (arrows). All magnifications ×400.
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Figure 1: Representative immunostaining of CA enzymes in MBs. Panel A shows no immunoreaction for CA IX, whereas the tumour in panel B is strongly positive. Panel C demonstrates CA XII-positive immunoreactivity in tumour cells. In panel D, CA II-positive immunostaining is confined to the endothelium of small blood vessels (arrows). All magnifications ×400.

Mentions: Immunohistochemical staining of CA II, CA IX and CA XII in tumour specimens is shown in Figure 1. CA II showed two distinct staining patterns: the endothelium of neovessels and the cytoplasm of MB/PNET cells. Of all tumours, 49% (n = 18, 12 MBs/6 PNETs) stained positively for CA II in the tumour endothelium (32% strong, 11% moderate and 6% weak staining). Positive cytoplasmic CA II staining in tumour cells was found in 73% (n = 27, 20 MBs/7 PNETs) of the cases (11% strong, 38% moderate and 24% weak staining).


The tumour-associated carbonic anhydrases CA II, CA IX and CA XII in a group of medulloblastomas and supratentorial primitive neuroectodermal tumours: an association of CA IX with poor prognosis.

Nordfors K, Haapasalo J, Korja M, Niemelä A, Laine J, Parkkila AK, Pastorekova S, Pastorek J, Waheed A, Sly WS, Parkkila S, Haapasalo H - BMC Cancer (2010)

Representative immunostaining of CA enzymes in MBs. Panel A shows no immunoreaction for CA IX, whereas the tumour in panel B is strongly positive. Panel C demonstrates CA XII-positive immunoreactivity in tumour cells. In panel D, CA II-positive immunostaining is confined to the endothelium of small blood vessels (arrows). All magnifications ×400.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2874782&req=5

Figure 1: Representative immunostaining of CA enzymes in MBs. Panel A shows no immunoreaction for CA IX, whereas the tumour in panel B is strongly positive. Panel C demonstrates CA XII-positive immunoreactivity in tumour cells. In panel D, CA II-positive immunostaining is confined to the endothelium of small blood vessels (arrows). All magnifications ×400.
Mentions: Immunohistochemical staining of CA II, CA IX and CA XII in tumour specimens is shown in Figure 1. CA II showed two distinct staining patterns: the endothelium of neovessels and the cytoplasm of MB/PNET cells. Of all tumours, 49% (n = 18, 12 MBs/6 PNETs) stained positively for CA II in the tumour endothelium (32% strong, 11% moderate and 6% weak staining). Positive cytoplasmic CA II staining in tumour cells was found in 73% (n = 27, 20 MBs/7 PNETs) of the cases (11% strong, 38% moderate and 24% weak staining).

Bottom Line: Medulloblastomas (MBs) and supratentorial primitive neuroectodermal tumours (PNETs) are the most common highly aggressive paediatric brain tumours.Importantly, CA IX expression predicted poor prognosis in both univariate (p = 0.041) and multivariate analyses (p = 0.016).We suggest that CA IX should be considered a potential prognostic and therapeutic target in MBs and PNETs.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Pathology, Tampere University Hospital, Tampere, Finland. kristiina.nordfors@gmail.com

ABSTRACT

Background: Medulloblastomas (MBs) and supratentorial primitive neuroectodermal tumours (PNETs) are the most common highly aggressive paediatric brain tumours. In spite of extensive research on these tumours, there are only few known biomarkers or therapeutic target proteins, and the prognosis of patients with these tumours remains poor. Our aim was to investigate whether carbonic anhydrases (CAs), enzymes commonly overexpressed in various tumours including glioblastomas and oligodendrogliomas, are present in MBs and PNETs, and whether their expression can be correlated with patient prognosis.

Methods: We determined the expression of the tumour-associated carbonic anhydrases CA II, CA IX and CA XII in a series of MB/PNET specimens (n = 39) using immunohistochemistry.

Results: Endothelial CA II, cytoplasmic CA II, CA IX and CA XII were expressed in 49%, 73%, 23% and 11% of the tumours, respectively. CA II was detected in the neovessel endothelium and the tumour cell cytoplasm. CA IX was mainly expressed in the tumour cells located in perinecrotic areas. CA XII showed the most homogenous distribution within the tumours. Importantly, CA IX expression predicted poor prognosis in both univariate (p = 0.041) and multivariate analyses (p = 0.016).

Conclusions: We suggest that CA IX should be considered a potential prognostic and therapeutic target in MBs and PNETs.

Show MeSH
Related in: MedlinePlus