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Prediction of response to docetaxel by quantitative analysis of class I and III beta-tubulin isotype mRNA expression in human breast cancers. 2003

Seiichi Hasegawa, and Yasuo Miyoshi, and Chiyomi Egawa, and Makoto Ishitobi, and Tetsuya Taguchi, and Yasuhiro Tamaki, and Morito Monden, and Shinzaburo Noguchi
Department of Surgical Oncology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan.

OBJECTIVE The relationship of intratumoral mRNA levels of class I and III beta-tubulin isotypes with clinical response to docetaxel has been studied in breast cancer patients. METHODS Expression of class I and class III beta-tubulin mRNA levels was determined by a real-time PCR in breast cancer tissues obtained from 39 patients with locally advanced breast cancers (n = 26) or locally recurrent breast cancers (n = 13) before docetaxel treatment. RESULTS Class I beta-tubulin mRNA levels of responders [6.58 +/- 1.43 (x10(2)), mean +/- SE] were significantly (P = 0.002) lower than those of nonresponders [14.97 +/- 2.95 (x10(2))], and class III beta-tubulin mRNA levels of responders (1.38 +/- 0.40) were also significantly (P = 0.003) lower than those of nonresponders (7.43 +/- 2.77). Breast cancers were divided into four groups according to the expression status of class I and class III beta-tubulin isotype mRNA, i.e., the class I-high/class III-high group (n = 13), the class I-high/class III-low group (n = 7), the class I-low/class III-high group (n = 7), and the class I-low/class III-low group (n = 12). The class I-high/class III-high group showed a very low response rate (15%), whereas the class I-low/class III-low group showed a very high response rate (75%). The class I-high/class III-low group and the class I-low/class III-high group showed intermediate response rates of 57% and 43%, respectively. CONCLUSIONS These results demonstrate that high expression of class I and class III beta-tubulin isotype mRNA is significantly associated with docetaxel resistance, and determination of class I and class III beta-tubulin isotype mRNA levels would be useful in the prediction of response to docetaxel.

UI MeSH Term Description Entries
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D008957 Models, Genetic Theoretical representations that simulate the behavior or activity of genetic processes or phenomena. They include the use of mathematical equations, computers, and other electronic equipment. Genetic Models,Genetic Model,Model, Genetic
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D001943 Breast Neoplasms Tumors or cancer of the human BREAST. Breast Cancer,Breast Tumors,Cancer of Breast,Breast Carcinoma,Cancer of the Breast,Human Mammary Carcinoma,Malignant Neoplasm of Breast,Malignant Tumor of Breast,Mammary Cancer,Mammary Carcinoma, Human,Mammary Neoplasm, Human,Mammary Neoplasms, Human,Neoplasms, Breast,Tumors, Breast,Breast Carcinomas,Breast Malignant Neoplasm,Breast Malignant Neoplasms,Breast Malignant Tumor,Breast Malignant Tumors,Breast Neoplasm,Breast Tumor,Cancer, Breast,Cancer, Mammary,Cancers, Mammary,Carcinoma, Breast,Carcinoma, Human Mammary,Carcinomas, Breast,Carcinomas, Human Mammary,Human Mammary Carcinomas,Human Mammary Neoplasm,Human Mammary Neoplasms,Mammary Cancers,Mammary Carcinomas, Human,Neoplasm, Breast,Neoplasm, Human Mammary,Neoplasms, Human Mammary,Tumor, Breast
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000077143 Docetaxel A semisynthetic analog of PACLITAXEL used in the treatment of locally advanced or metastatic BREAST NEOPLASMS and NON-SMALL CELL LUNG CANCER. Docetaxel Anhydrous,Docetaxel Hydrate,Docetaxel Trihydrate,Docetaxol,N-Debenzoyl-N-tert-butoxycarbonyl-10-deacetyltaxol,NSC 628503,RP 56976,RP-56976,Taxoltere Metro,Taxotere,N Debenzoyl N tert butoxycarbonyl 10 deacetyltaxol,RP56976
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D000972 Antineoplastic Agents, Phytogenic Agents obtained from higher plants that have demonstrable cytostatic or antineoplastic activity. Antineoplastics, Botanical,Antineoplastics, Phytogenic,Agents, Phytogenic Antineoplastic,Botanical Antineoplastics,Phytogenic Antineoplastic Agents,Phytogenic Antineoplastics

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