Real-time PCR: detection of oestrogen receptor-alpha and -beta isoforms and variants in breast cancer. 2010

Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
Department of Physiology, Faculty of Medicine, Kuwait University, Safat, Kuwait. albader@hsc.edu.kw

BACKGROUND Splice variants exist for both alpha and beta oestrogen receptors (ERs). Oestrogen function results from a balance between the wild-type ERs (wt) and their variants. METHODS Forty formalin-fixed paraffin-embedded breast cancer samples were analysed by real-time PCR using ERα primer sets detecting wt and exon-deleted 3, 5, 6 and 7 variants. The ERβ primer sets detected wt ERβ1 and ERβ2 and ERβ5 variants. At the end of the PCR cycles, a dissociation curve was generated showing the peaks for each sample at specific melting temperatures (Tm); finding more than one peak indicated the presence of variants. RESULTS Many samples expressed both wt ER isoforms and their variants. The Tm value served as a cut-off point for determination of wt versus variant ER expression. CONCLUSIONS This method of detection of wt and variant ER could help in patient selection for anti-oestrogen therapy and in monitoring response to therapy.

UI MeSH Term Description Entries
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
D005784 Gene Amplification A selective increase in the number of copies of a gene coding for a specific protein without a proportional increase in other genes. It occurs naturally via the excision of a copy of the repeating sequence from the chromosome and its extrachromosomal replication in a plasmid, or via the production of an RNA transcript of the entire repeating sequence of ribosomal RNA followed by the reverse transcription of the molecule to produce an additional copy of the original DNA sequence. Laboratory techniques have been introduced for inducing disproportional replication by unequal crossing over, uptake of DNA from lysed cells, or generation of extrachromosomal sequences from rolling circle replication. Amplification, Gene
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D016612 Paraffin Embedding The infiltrating of tissue specimens with paraffin, as a supporting substance, to prepare for sectioning with a microtome. Embedding, Paraffin
D045744 Cell Line, Tumor A cell line derived from cultured tumor cells. Tumor Cell Line,Cell Lines, Tumor,Line, Tumor Cell,Lines, Tumor Cell,Tumor Cell Lines
D047628 Estrogen Receptor alpha One of the ESTROGEN RECEPTORS that has marked affinity for ESTRADIOL. Its expression and function differs from, and in some ways opposes, ESTROGEN RECEPTOR BETA. ERalpha,Estradiol Receptor alpha,Estrogen Receptor 1,Estrogen Receptors alpha,Receptor alpha, Estrogen,Receptor alpha, Estradiol,alpha, Estradiol Receptor
D047629 Estrogen Receptor beta One of the ESTROGEN RECEPTORS that has greater affinity for ISOFLAVONES than ESTROGEN RECEPTOR ALPHA does. There is great sequence homology with ER alpha in the DNA-binding domain but not in the ligand binding and hinge domains. ERbeta,ERbetacx,Estrogen Receptor 2,Estrogen Receptors beta,Receptor beta, Estrogen
D020133 Reverse Transcriptase Polymerase Chain Reaction A variation of the PCR technique in which cDNA is made from RNA via reverse transcription. The resultant cDNA is then amplified using standard PCR protocols. Polymerase Chain Reaction, Reverse Transcriptase,Reverse Transcriptase PCR,PCR, Reverse Transcriptase,Transcriptase PCR, Reverse

Related Publications

Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
June 2001, European journal of cancer (Oxford, England : 1990),
Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
September 2007, Chinese medical journal,
Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
July 1997, European journal of cancer (Oxford, England : 1990),
Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
July 1998, Molecular human reproduction,
Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
September 2006, British journal of cancer,
Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
June 1997, Annals of medicine,
Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
December 1991, Journal of molecular endocrinology,
Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
April 2000, The British journal of surgery,
Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
September 2000, The British journal of surgery,
Maie Al-Bader, and Shorooq Al-Saji, and Christopher H J Ford, and Issam Francis, and Bushra Al-Ayadhy
October 2000, The Journal of pathology,
Copied contents to your clipboard!