A Jakubowska

..Two genes of special interest are prohibitin (PHB) and methylene-tetrahydrofolate reductase (MTHFR), both of which are important either directly or indirectly in maintaining genomic integrity...

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..The C to T transition in the 3' untranslated region of the prohibitin (PHB) gene alters mRNA function and has recently been shown to be associated with hereditary breast cancer risk in Polish women harbouring BRCA1 mutations...

..To investigate whether or not a genetic variant in BARD1 (Cys557Ser) contributes to early-onset breast cancer in Poland, or modifies the risk of breast cancer in women with an inherited predisposition to breast cancer...

..In conclusion, the RAD51 C allele seems to protect against both breast and ovarian cancer in women harboring BRCA1 mutations...

..The PHB 1630 C/T single nucleotide polymorphism was associated with breast cancers with clinical features typical for BRCA1-positive tumours and is deserving of further study...

..07-0.62; P = 0.0015). This finding suggests that RAD51 is a genetic modifier of breast cancer risk in BRCA1 carriers in the Polish population. It will be of interest to confirm this in other populations as well...

..89-1.32). The polymorphism was not associated with breast cancer risk for either BRCA1 or BRCA2 mutation carriers. The ITGB3 Leu33Pro polymorphism does not modify breast or ovarian cancer risk in BRCA1 or BRCA2 mutation carriers...

..It is expected that the penetrance of BRCA2 mutations for stomach cancer will vary from country to country, reflecting local environmental and lifestyle factors...

..CDH1 gene mutations are not present in Polish families with HDGC defined by the modified clinical criteria. Further studies of families with HDGC matching the restrictive criteria for HDGC are needed...

..Recently, a large deletion of exons 9 and 10 of CHEK2 was identified in several unrelated patients with breast cancer of Czech or Slovak origin. The geographical and ethnic extent of this founder allele has not yet been determined...

..The sensitivity of our analyses was sufficient to reliably detect mutations without the necessity of tissue culturing to obtain enough template cDNA for analysis...

..1) than for the missense mutation I157T (OR=1.4). This study suggests that cancer risks may be specific for particular alleles of a susceptibility gene and that these different risks should be taken into account by genetic counselors...

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..In conclusion, we report an increased melanoma risk among carriers of the N991D change of the BRCA2 and no association of the CHEK2 changes with malignant melanoma...

..However, it is of interest to estimate the breast cancer risks associated with carrying two mutations because this information may be informative for genetic counsellors and may provide clues to the carcinogenic process...

..01). Women with a CHEK2 mutation face a fourfold increase in the risk of ER-positive breast cancer and might be candidates for tamoxifen chemoprevention...

..To establish the contribution of eight founder alleles in three DNA damage repair genes (BRCA1, CHEK2 and NBS1) to prostate cancer in Poland, and to measure the impact of these variants on survival among patients...

..Our results suggest that the FHIT gene plays an important role in carcinogenesis of at least one fourth of all colorectal cancers...

..The purpose of the present study was to identify the clinical and pathologic features of ovarian cancers in patients who have a family history of breast or ovarian cancer but who do not have a mutation in the BRCA1 or BRCA2 gene...

..It seems that the 657del5 mutation of exon 6 of NBS1 gene may be responsible for the occurrence of a small proportion of MM patients, characterized by the occurrence of breast cancer among their relatives...

..In conclusion, preventive oophorectomy is acceptable to most Polish women at high risk of hereditary ovarian cancer and should be among the range of services offered in cancer genetics clinics...

..Breast cancer risk did not differ between carriers of the 300 T > G and 5382insC mutation. Our results suggest that the PHB 3'UTR T allele increases the risk of breast cancer in patients who are already at increased risk of disease...

..In conclusion, it seems to be justified to consider systematic breast surveillance beginning at the age around 35-40 years as an option in women from < or =55 MM/CFA families...

..In total, recurrent mutations were found in 33 (94%) of the 35 families with detected mutations. Three BRCA1 abnormalities-5382insC, C61G, and 4153delA-accounted for 51%, 20%, and 11% of the identified mutations, respectively...

..We are presenting it on examples of late-onset breast cancers from Poland, but it seems to be justified to expect that similar results can be achieved from other malignancies...

..Together, it appears that functional polymorphisms in the MTHFR gene modify the risk of breast and may potentially alter the risk of ovarian cancer in women with an inherited predisposition...

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..Although the carcinogenic mechanism associated with this particular locus of 8q24 is unclear it appears to be specific to prostate cancer...

..Two-gene models provide numerous challenges for gene identification and cancer risk assessment...

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..Thus, it appears that these polymorphisms do not influence disease risk in Polish women carrying one of the three common BRCA1 founder mutations...

..Our results and reports by others indicate that, besides colorectal and endometrial cancer, the late-onset endometrioid type of ovarian cancer can be a feature of families with MSH6 germline mutations...

..DNA sequencing using RNA as a basis for template construction may be a valuable and economical alternative to genomic DNA sequencing...

..To investigate the contribution of CDKN2A A148T common variant to early-onset breast cancer in Poland, and to establish the characteristic features of these cancers...

..It is important that mutation surveys be conducted in other countries prior to the introduction of national genetic screening programs...

..We concluded that cystadenoma is likely to be a characteristic feature of the subgroup of families with hereditary ovarian cancers unassociated with BRCA1/BRCA2 constitutional mutations...

..Constitutional mutations were found in five out of eight patients. Three mutations were novel: g.IVS7+5G>A, g.156709T>A, and g.IVS21+1G>A (p.G203-E240del, p.Y659X, and p.I703-E737del)...

..The CYP1B1 gene is a polymorphic member of the P450 gene family and is considered to be a candidate gene for cancers of various types...

..The results of this study revealed a paucity of mutations in CDKN2A/ARF suggesting that in the Polish population this gene does not contribute significantly to early-onset breast cancer, pancreatic cancer and malignant melanoma...

..3% of individuals) and may be responsible for an important fraction of cancer cases. We estimate that the lifetime cancer risk among carriers of this allele is 30% higher than that of individuals with two wild-type alleles...

..We were able to obtain blood samples from 19 of mutation positive cases. Eight (42%) of these harboured germline mutations in persons from distinct undiagnosed VHL families...

..This is one of the most common protein-truncating CHEK2 variants in Poland. Overall, 2% of all breast cancers in Poland can be attributed to one of three protein-truncating mutations in CHEK2...

..Markers associated with majority of groups included: BRCA1, CHEK2, p53, TNRnTT, FGFRnAA, XPD CC/AA and XPD GG. Some markers appeared to be group specific and included polymorphisms in CDKN2A, CYP1B1, M3K nAA, and RS67...

..g. p53 mutations) and have a high level of genotoxic DNA damage induced by tobacco smoke. We speculate that lung cancer cells with impaired CHEK2 function undergo increased rates of cell death...

..1-11.3; P=0.045); in particular for familial prostate cancer (odds ratio=12; 95% confidence interval: 2.9-51; P=0.0004). We consider that the risk of prostate cancer in BRCA1 carriers varies with the position of the mutation...

..5; p < 0.0001). We conclude that the I157T variant of CHEK2 increases the risk of colorectal cancer among MMR-negative, HNPCC/HNPCC-related families in Poland...

..This rapid test will facilitate large-scale national epidemiologic and clinical studies of hereditary breast cancer, potentially including studies of chemoprevention...

..23; P = 0.0046). The results indicate that NOD2 may be a predisposing factor to colorectal cancer characterized by an older average age of disease onset in persons who do not harbor any other genetic predisposition to disease...

..These findings need confirmation by more extensive studies because only a limited number of cases were analysed and there are relatively few reports published...

..To investigate the contribution of CHEK2 mutations to early-onset breast cancer in Poland and to establish the characteristic features of these cancers...

..It appears that the 657del5 mutation in exon 6 of the NBS1 gene is responsible for the occurrence of a small but significant proportion of familial breast cancer patients...

..Among 14 families without BRCA1 Polish founder mutations in this gene were excluded in 2 families and BRCA2 mutation was excluded in one family...

..Our results suggest that the range of cancers associated with the rs6983267 marker might be larger than previously thought...

..The aim of the study was to examine whether pleomorphic adenoma of salivary glands can occur on the basis of constitutional BRCA-1 mutations...

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..We investigated whether or not inherited variation in MSR1, RNASEL and E-cadherin contribute to prostate cancer risk in Poland...

..Clonality studies by PCR may be performed in material obtained through FNAB. Clonality assessment by PCR technique is very useful in differential diagnosis of lymphoproliferative disordes...

..63, 95% CI, 0.48-0.83), and a potential effect on ovarian cancer risk (OR(adj) 0.62, 95% CI, 0.33-1.18; OR(clustered) 0.62, 95% CI, 0.47-0.83). Thus, the 936_C>T polymorphism appears to modify disease risks in BRCA1 carriers...

..Thus, it appears that the ITGB3_Leu33Pro polymorphism may potentially increase the risk of ovarian cancer in Polish women with an inherited BRCA1 mutation...

..CONCLUSIONS: Clinical features of HOC in Poland and in other countries are similar. 2. Introduction of DNA tests to the clinical and pedigree diagnostic criteria allows detection of subgroups of HOC with different clinical features...

..38. CONCLUSIONS: 1. Features of HOC in studied material and in other populations are similar 2. High morphological grading is the most characteristic for HOC in BRCA1 carriers...

..In summary, the F31I polymorphism in AURKA is not associated with a modified risk of breast cancer in BRCA1 and BRCA2 carriers...

..In patients with a high-risk profile however, CHEK2*1100delC was indicative for this risk and highest for early-onset breast cancer...

..Thus, 135G-->C may modify the risk of breast cancer in BRCA2 mutation carriers by altering the expression of RAD51. RAD51 is the first gene to be reliably identified as a modifier of risk among BRCA1/2 mutation carriers...

..In differential diagnosis of these changes in the lungs we should take into consideration the presence of papilloma in the bronchi. A prognosis of papillomatosis in the lower airways in children is always serious...

..Despite knowledge of RLKs functions is increasing rapidly, yet major challenges remain. These include identifying ligands that activate RLKs and characterizing downstream pathways...