title: Expression profiles of non-small cell lung cancers on cDNA microarrays: identification of genes for prediction of lymph-node metastasis and sensitivity to anti-cancer drugs.
abstract: To investigate genes involved in pulmonary carcinogenesis and those related to sensitivity of nonsmall cell lung cancers (NSCLCs) to therapeutic drugs, we performed cDNA microarray analysis of 37 NSCLCs after laser-capture microdissection of cancer cells from primary tumors. A clustering algorithm applied to the expression data easily distinguished two major histological types of non-small cell lung cancer, adenocarcinoma and squamous cell carcinoma. Subsequent analysis of the 18 adenocarcinomas identified 40 genes whose expression levels could separate cases with lymph-node metastasis from those without metastasis. In addition, we compared the expression data with measurements of the sensitivity of surgically dissected NSCLC specimens to six anti-cancer drugs (docetaxel, paclitaxel, irinotecan, cisplatin, gemcitabine, and vinorelbine), as measured by the CD-DST (collagen gel droplet embedded culture-drug sensitivity test) method. We found significant associations between expression levels of dozens of genes and chemosensitivity of NSCLCs. Our results provide valuable information for eventually identifying predictive markers and novel therapeutic target molecules for this type of cancer.
authors.affiliation: Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Japan.
authors.forename: Takefumi
authors.initials: T
authors.lastname: Kikuchi
authors.forename: Yataro
authors.initials: Y
authors.lastname: Daigo
authors.forename: Toyomasa
authors.initials: T
authors.lastname: Katagiri
authors.forename: Tatsuhiko
authors.initials: T
authors.lastname: Tsunoda
authors.forename: Koichi
authors.initials: K
authors.lastname: Okada
authors.forename: Soji
authors.initials: S
authors.lastname: Kakiuchi
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Zembutsu
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Furukawa
authors.forename: Masafumi
authors.initials: M
authors.lastname: Kawamura
authors.forename: Koichi
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Kohzoh
authors.initials: K
authors.lastname: Imai
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Nakamura
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics; D000368:Aged; D000970:Antineoplastic Agents / Q000494:pharmacology*; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics*; D016000:Cluster Analysis; D018076:DNA, Complementary; D004354:Drug Screening Assays, Antitumor; D005260:Female; D020869:Gene Expression Profiling; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics*; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D020411:Oligonucleotide Array Sequence Analysis
chemical_list: D000970:Antineoplastic Agents; D018076:DNA, Complementary