Abstract:
:Using the novel tissue microarray technique, we studied immunohistochemical expression of cell cycle regulators p53, p21, pRb in 42 grade II oligodendrogliomas, 16 grade III anaplastic oligodendrogliomas, 10 primary and 4 recidive grade II oligoastrocytomas, 10 grade III oligoastrocytomas and 2 other grade II mixed gliomas. The p53 immunopositivity associated with malignant histology of the tumor (p = 0.01, Mann-Whitney test) and high pRb expression (p = 0.015). The p21 score associated strongly with histological grade (p < 0.001). The immunopositive tumors had a significantly higher rate of proliferation (p = 0.021). The p21 immunopositivity correlated positively with p53 immunopositivity: among the 33 p21 immunopositive tumors 30 (91%) were p53 immunopositive and only 3 were p53 immunonegative (p = 0.017). Patients with p21 immunonegative primary tumors had significantly better prognosis: among them 42 of the 46 (91%) survived, whereas only 18 of the 30 patients (60%) with p21 immunopositive primary tumors survived until the follow-up date (p = 0.0017). Statistical significance was reached in multivariate analysis as well (p = 0.01, exp(B) = 5.5). The pRb immunopositive tumors had higher proliferation rate than immunonegative tumors (p = 0.002). In multivariate variance analysis, comparing the effects of different regulatory proteins on cell proliferation, only the amount of pRb expression reached statistical significance (p = 0.004). In conclusion, the expression of p21 in oligodendrocytic tumors seems to be upregulated by p53 expression which rises with cell proliferation and malignancy as in attempt to halt cell cycle but seems to be overrun by other factors. The amount of p21 expression has independent prognostic significance and could be used in diagnosis to help the difficult evaluation of the malignancy potential of oligodendrogliomas and oligoastrocytomas.
journal_name
J Neurooncoljournal_title
Journal of neuro-oncologyauthors
Miettinen HE,Paunu N,Rantala I,Kalimo H,Paljärvi L,Helin H,Haapasalo Hdoi
10.1023/a:1012961918848subject
Has Abstractpub_date
2001-10-01 00:00:00pages
29-37issue
1eissn
0167-594Xissn
1573-7373journal_volume
55pub_type
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journal_title:Journal of neuro-oncology
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doi:10.1023/a:1005702228721
更新日期:1997-09-01 00:00:00
abstract::The utility of current response criteria has not been established in anaplastic astrocytoma (AA). We retrospectively reviewed MR images for 20 patients with AA and compared RANO-based approaches to clinician impression described as follow: (1) standard RANO-based criteria met by growth of or development of new enhanci...
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journal_title:Journal of neuro-oncology
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
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更新日期:1995-01-01 00:00:00
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journal_title:Journal of neuro-oncology
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
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更新日期:2012-03-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-019-03177-0
更新日期:2019-07-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/b:neon.0000033383.84900.c1
更新日期:2004-07-01 00:00:00
abstract:UNLABELLED:Cranio-spinal irradiation is the gold standard treatment used in non metastatic medulloblastoma as prophylaxis against central nervous system (CNS) metastases. However, given the severe late effects caused by this procedure in children under 3 years of age, most pediatric oncologists are currently treating t...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00146088
更新日期:1996-01-01 00:00:00
abstract::Human melanoma proteoglycan (HMP), a melanoma-associated antigen, is expressed in both human melanomas and gliomas. We used HMP-specific monoclonal antibody (mAb) VT68.2 to investigate whether murine GL261 cerebral gliomas express the HMP homologue AN2 and to determine whether AN2 could be targeted for selective deliv...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-009-9798-3
更新日期:2009-08-01 00:00:00
abstract::The Notch signal regulates both cell viability and apoptosis, and maintains stemness of various cancers including glioblastoma (GBM). Although Notch signal inhibition may be an effective strategy in treating GBM initiating cells (GICs), its applicability to the different subtypes of GBM remains unclear. Here, we analy...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-014-1630-z
更新日期:2015-01-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-007-9494-0
更新日期:2008-03-01 00:00:00
abstract::Gliomatosis cerebri (GC) are extensively infiltrative glial tumors classified as astrocytic tumors in the current World Health Organization (WHO) classification scheme. In investigating the tumorigenesis of GC, we reviewed 28 cases of GC immunohistochemically and carried out array-based comparative genomic hybridizati...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
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更新日期:2008-12-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
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journal_title:Journal of neuro-oncology
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
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更新日期:2018-05-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/b:neon.0000003680.84840.52
更新日期:2003-11-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
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更新日期:2003-06-01 00:00:00
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更新日期:2019-09-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
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更新日期:2020-07-01 00:00:00
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journal_title:Journal of neuro-oncology
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更新日期:2007-07-01 00:00:00
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journal_title:Journal of neuro-oncology
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journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
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更新日期:1996-12-01 00:00:00
abstract::The type III mutant epidermal growth factor receptor (EGFR) is expressed on the cell surface of a subset of glioma, but not of normal tissues. In this study, we investigated the in vivo kinetics of 3C10 mouse monoclonal antibody (mAb), specifically recognizing the type III mutant EGFR (EGFRvIII), using athymic nude mi...
journal_title:Journal of neuro-oncology
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