Abstract:
:Resistance to cisplatin is a major obstacle to successful treatment of head and neck squamous cell carcinoma (HNSCC). To investigate the molecular mechanism of this resistance, we compared the gene expression profiles between the cisplatin-sensitive SCC cell lines (Sa-3, H-1 and KB) and the cisplatin-resistant cell lines established from them (Sa-3R, H-1R and KB-R) using Affymetrix U133 Plus 2.0 microarray. We identified 199 genes differentially expressed in each group. To identify important functional networks and ontologies to cisplatin resistance, the 199 genes were analyzed using the Ingenuity Pathway Analysis Tool. Fifty-one of these genes were mapped to genetic networks, and we validated the top-10 upregulated genes by real-time reverse transcriptase-polymerase chain reaction. Five novel genes, LUM, PDE3B, PDGF-C, NRG1 and PKD2, showed excellent concordance with the microarray data. In 48 patients with oral SCC (OSCC), positive immunohistochemical staining for the five genes correlated with chemoresistance to cisplatin-based combination chemotherapy. In addition, the expression of the five genes predicted the patient outcomes with chemotherapy. Furthermore, siRNA-directed suppressed expression of the five genes resulted in enhanced susceptibility to cisplatin-mediated apoptosis. These results suggested that these five novel genes have great potential for predicting the efficacy of cisplatin-based chemotherapy against OSCC. Global gene analysis of cisplatin-resistant cell lines may provide new insights into the mechanisms underlying clinical cisplatin resistance and improve the efficacy of chemotherapy for human HNSCC.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Yamano Y,Uzawa K,Saito K,Nakashima D,Kasamatsu A,Koike H,Kouzu Y,Shinozuka K,Nakatani K,Negoro K,Fujita S,Tanzawa Hdoi
10.1002/ijc.24704subject
Has Abstractpub_date
2010-01-15 00:00:00pages
437-49issue
2eissn
0020-7136issn
1097-0215journal_volume
126pub_type
杂志文章abstract::To compare the presentation and prognosis of non-Hodgkin lymphoma (NHL) in people with AIDS (PWA) and in the general Italian population, a record linkage study was carried out. The fraction of NHLs attributable to HIV/AIDS was also estimated. Information from the National AIDS Registry (RAIDS) was linked with records ...
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