0000000000562663

AUTHOR

Laima Tihomirova

showing 5 related works from this author

BRCA1 gene-related hereditary susceptibility to breast and ovarian cancer in Latvia

2013

Abstract Purpose In this report, we summarise data on BRCA1 gene analysis in Latvia to characterise criteria of genetic testing for breast and ovarian cancer susceptibility. Material/methods Analysis by SSCP/HD, MALDI-TOF mass spectrometry or DNA sequencing was used for mutation detection. Mutations identified were confirmed by direct DNA sequencing. Results Out of 1068 breast and 231 ovarian cancer patients from different families: 58 carried the c.5266dupC and 43 carried the c.4035delA mutations. Every 4th patient in our study did not report cancer in the family. The breast cancer was diagnosed earlier in carriers of the c.5266dupC than in carriers of the c.4035delA ( p  = 0.003). The inc…

AdultOncologymedicine.medical_specialtyBreast NeoplasmsDiseasemedicine.disease_causePolymerase Chain ReactionBreast cancerInternal medicinemedicineHumansGenetic Predisposition to DiseaseFamily historyskin and connective tissue diseasesPolymorphism Single-Stranded ConformationalAgedGenetic testingAged 80 and overOvarian NeoplasmsMutationmedicine.diagnostic_testBRCA1 Proteinbusiness.industryCancerSingle-strand conformation polymorphismDNA NeoplasmGeneral MedicineMiddle AgedPrognosismedicine.diseaseLatviaMutationFemalebusinessOvarian cancerFollow-Up StudiesAdvances in Medical Sciences
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Association of genetic variants with pancreatic cancer

2007

AdultGeneticsCancer ResearchADP-Ribosylation FactorsGenes p16Association (object-oriented programming)Genes BRCA1Genetic variantsAdenocarcinomaMiddle AgedProtein Serine-Threonine KinasesBiologymedicine.diseasePancreatic NeoplasmsAMP-Activated Protein Kinase KinasesRisk FactorsPancreatic cancerMutationGeneticsmedicineHumansFemaleGenetic Predisposition to DiseaseMolecular BiologyCancer Genetics and Cytogenetics
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Associations of common breast cancer susceptibility alleles with risk of breast cancer subtypes in BRCA1 and BRCA2 mutation carriers

2014

Introduction More than 70 common alleles are known to be involved in breast cancer (BC) susceptibility, and several exhibit significant heterogeneity in their associations with different BC subtypes. Although there are differences in the association patterns between BRCA1 and BRCA2 mutation carriers and the general population for several loci, no study has comprehensively evaluated the associations of all known BC susceptibility alleles with risk of BC subtypes in BRCA1 and BRCA2 carriers. Methods We used data from 15,252 BRCA1 and 8,211 BRCA2 carriers to analyze the associations between approximately 200,000 genetic variants on the iCOGS array and risk of BC subtypes defined by estrogen re…

Cancer ResearchReceptor ErbB-2Genes BRCA2BRCALOCIGenes BRCA1MODIFIERSVARIANTSErbB-2610 Medical sciences MedicineDuctalReceptorsMedicine and Health SciencesINVESTIGATORSBreastskin and connective tissue diseasesProgesteroneMedicine(all)Carcinoma Ductal BreastMiddle AgedAdult; Aged; Alleles; Breast Neoplasms; Carcinoma; Carcinoma Ductal Breast; Carcinoma Lobular; Female; Genetic Predisposition to Disease; Heterozygote; Humans; Middle Aged; Neoplasm Grading; Neoplasm Staging; Receptor ErbB-2; Receptors Estrogen; Receptors Progesterone; Genes BRCA1; Genes BRCA2; Cancer Research; OncologyOncologyReceptors EstrogenTUMOR SUBTYPESFemaleReceptors ProgesteroneReceptorResearch ArticleAdultHeterozygote610Breast NeoplasmsMEDULLARY CARCINOMAOVARIAN-CANCERLobularHumansGenetic Predisposition to DiseaseGENOME-WIDE ASSOCIATIONAllelesAgedNeoplasm StagingAdult; Aged; Alleles; Breast Neoplasms; Carcinoma; Carcinoma Ductal Breast; Carcinoma Lobular; Female; Genetic Predisposition to Disease; Heterozygote; Humans; Middle Aged; Neoplasm Grading; Neoplasm Staging; Receptor ErbB-2; Receptors Estrogen; Receptors Progesterone; Genes BRCA1; Genes BRCA2CONSORTIUMCarcinomaBRCA1EstrogenBRCA2Carcinoma LobularESTROGEN-RECEPTORGenesNeoplasm GradingBreast Cancer Research
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Multiple independent variants at the TERT locus are associated with telomere length and risks of breast and ovarian cancer

2013

Journal article TERT-locus SNPs and leukocyte telomere measures are reportedly associated with risks of multiple cancers. Using the Illumina custom genotyping array iCOGs, we analyzed ~480 SNPs at the TERT locus in breast (n = 103,991), ovarian (n = 39,774) and BRCA1 mutation carrier (n = 11,705) cancer cases and controls. Leukocyte telomere measurements were also available for 53,724 participants. Most associations cluster into three independent peaks. The minor allele at the peak 1 SNP rs2736108 associates with longer telomeres (P = 5.8 × 10!-7), lower risks for estrogen receptor (ER)-negative (P = 1.0 × 10!-8) and BRCA1 mutation carrier (P = 1.1 × 10!-5) breast cancers and altered promot…

TelomeraseMessengerCàncer d'ovariEstrogen receptorAetiology screening and detection [ONCOL 5]0302 clinical medicineBreast cancerRisk FactorsAlternative Splicing; Biomarkers Tumor; Breast Neoplasms; Case-Control Studies; Chromatin; DNA Methylation; Female; Gene Expression Profiling; Genetic Loci; Genetic Predisposition to Disease; Genome-Wide Association Study; Genotype; Humans; Luciferases; Oligonucleotide Array Sequence Analysis; Ovarian Neoplasms; Polymorphism Single Nucleotide; RNA Messenger; Real-Time Polymerase Chain Reaction; Reverse Transcriptase Polymerase Chain Reaction; Risk Factors; Telomerase; Telomere; GeneticsGenotypeBUCCAL CELLSLuciferasesTelomeraseOligonucleotide Array Sequence AnalysisOvarian Neoplasms0303 health sciencesTumorTelòmerReverse Transcriptase Polymerase Chain ReactionGENETIC-VARIATIONCOMMON VARIANTSSingle Nucleotidetert-clptm1l locus; genome-wide association; genetic-variation; susceptibility loci; buccal cells; fibroblasts; common variants; carcinoma; reverse-transcriptase htert; metaanalysisTelomereAetiology screening and detection Immune Regulation [ONCOL 5]Chromatin3. Good healthTumor Markers Biological030220 oncology & carcinogenesisFemaleFIBROBLASTSGenotypeSUSCEPTIBILITY LOCICARCINOMASingle-nucleotide polymorphismBreast NeoplasmsBiologyReal-Time Polymerase Chain ReactionPolymorphism Single NucleotideArticleCàncer de mama03 medical and health sciencesBreast cancerSDG 3 - Good Health and Well-beingTranslational research [ONCOL 3]Ovarian cancermedicineGeneticsBiomarkers TumorHumansGenetic Predisposition to DiseaseRNA MessengerPolymorphismAlleleGENOME-WIDE ASSOCIATIONMETAANALYSIS030304 developmental biologyMolecular epidemiology Aetiology screening and detection [NCEBP 1]Breast cancer susceptibilityHereditary cancer and cancer-related syndromes [ONCOL 1]Translational research Genomic disorders and inherited multi-system disorders [ONCOL 3]Gene Expression ProfilingDNA Methylationmedicine.diseaseMolecular biologyTERT-CLPTM1L LOCUSTelomereMinor allele frequencyAlternative SplicingGenetic LociCase-Control StudiesRNABiomarkersREVERSE-TRANSCRIPTASE HTERTGenome-Wide Association StudyNature genetics
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Strong founder effects in BRCA1 mutation carrier breast cancer patients from Latvia

1999

Germ-line mutations of the BRCA1 gene account for approximately half of the cases of hereditary breast/ovarian cancers. We have screened index patients from 15 breast cancer families and 8 sporadic breast cancer patients from Latvia for mutations in all coding exons of the BRCA1 gene, using combined Heteroduplex Analysis/SSCP followed by direct sequencing of the variants. BRCA1 germ-line mutations proved to be frequent in Latvian breast cancer patients, also in moderate-risk families and sporadic patients. Out of 23 cases a total of 8 patients (35%) exhibited three different mutations (5382insC, C61G, 4153delA). Interestingly, these three recurrent mutations accounted for all mutations in o…

OncologyGeneticsmedicine.medical_specialtyMutationDirect sequencingSingle-strand conformation polymorphismBiologymedicine.diseasemedicine.disease_causeExonBreast cancerInternal medicineGeneticsmedicineGenetics (clinical)Brca1 geneFounder effectHeteroduplexHuman Mutation
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