Abstract:
AIMS:INI1 expression and its correlation with MGMT gene promoter methylation status and follow-up was investigated in 77 surgically removed glioblastomas then treated with radiotherapy (RT) or RT plus temozolomide (TMZ). METHODS:INI1 was determined by immunohistochemistry and MGMT by methylation-specific PCR. RESULTS:INI1 was expressed in 83.1% of cases. The median overall survival (OS) was 13.6 months in INI1+ tumours and 7.2 months in INI1- tumours. 31.3% of patients with INI1+ tumours were alive compared with 15.4% of patients with INI1- tumours. MGMT methylation was detected in 31.2% of cases. OS was significantly different between patients with methylated tumours and un-methylated tumours (p < 0.04), and between patients with RT+ TMZ and RT alone (p < 0.001). Considering both treatment and MGMT, the difference in OS was significant (p < 0.002). The difference in OS according to MGMT and INI1 was significant (p < 0.04). The longest median OS was recorded among methylated and INI1+ tumours. Among un-methylated tumours, the median OS was 11.1 months in INI1+ and 6.5 months in INI1- tumours. No patients were alive with un-methylated and INI1- tumours. CONCLUSIONS:Loss of INI1 immunohistochemical expression in glioblastoma may be indicating an underlying molecular aberration accounting for the more aggressive clinical behaviour.
journal_name
Pathologyjournal_title
Pathologyauthors
Zunarelli E,Bigiani N,Sartori G,Migaldi M,Sgambato A,Maiorana Adoi
10.1097/PAT.0b013e328340bb26subject
Has Abstractpub_date
2011-01-01 00:00:00pages
17-23issue
1eissn
0031-3025issn
1465-3931pii
01268031-201101000-00003journal_volume
43pub_type
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