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Cyclin D1 expression in astrocytomas is associated with cell proliferation activity and patient prognosis.

Authors: Sallinen, S L  Sallinen, P K  Kononen, J T  Syrjäkoski, K M  Nupponen, N N  Rantala, I S  Helén, P T  Helin, H J  Haapasalo, H K 
Citation: Sallinen SL, etal., J Pathol. 1999 Jul;188(3):289-93. doi: 10.1002/(SICI)1096-9896(199907)188:3<289::AID-PATH351>3.0.CO;2-X.
Pubmed: (View Article at PubMed) PMID:10419598
DOI: Full-text: DOI:10.1002/(SICI)1096-9896(199907)188:3<289::AID-PATH351>3.0.CO;2-X

An important positive regulator of the cell cycle, cyclin D1, is often amplified and overexpressed in malignancies. Cyclin D1 aberrations were analysed in grade II-IV astrocytomas by fluorescence in situ hybridization (FISH), mRNA in situ hybridization and immunohistochemistry. Proliferation activity was determined by Ki-67(MIB-1) immunolabelling and mitotic counting. High cyclin D1 expression was observed in grade IV astrocytomas (grades II-III versus grade IV; mRNA expression: p<0.001; immunoexpression: p=0.013), and correlated with poor patient survival (p<0.001, n=46). Upregulated cyclin D1 expression was also closely associated with poor patient prognosis in grade II-III astrocytomas (p<0.001, n=30). Cyclin D1 gene was not found to be amplified (n=7). Cell proliferation activity was significantly increased in tumours exhibiting high cyclin D1 mRNA levels (Ki-67(MIB-1): p<0.001; mitotic count: p<0.001) and high cyclin D1 protein expression (Ki-67(MIB-1): p=0.002; mitotic count: p=0.012). These results indicate that increased production of cyclin D1 is closely associated with high cell proliferation activity and aggressive behaviour in diffusely infiltrating astrocytomas.


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CRRD Object Information
CRRD ID: 13681931
Created: 2018-07-12
Species: All species
Last Modified: 2018-07-12
Status: ACTIVE


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