Temat: MGMT - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Rola wybranych polimorfizmów genu MGMT w rozwoju chorób nowotworowych
Role of selected MGMT polymorphisms in cancer development
Autorzy:: Kiczmer, Paweł
Szydło, Błażej
Strzelczyk, Joanna K.
Gołąbek, Karolina
Ostrowska, Zofia
Powiązania:: https://bibliotekanauki.pl/articles/1035896.pdf
Data publikacji:: 2017
Wydawca:: Śląski Uniwersytet Medyczny w Katowicach
Tematy:: polimorfizm
nowotwory
mgmt
cancer
polymorphism
Opis:: Materiał genetyczny komórki jest nieustannie narażony na działanie czynników mutagennych. Odpowiednie mechanizmy chroniące przed szkodliwym wpływem mutagenów są niezwykle ważne dla prawidłowego funkcjonowania oraz kontroli proliferacji komórek. Jednym z mechanizmów naprawczych jest działanie enzymu MGMT, który odpowiada za ochronę DNA komórki przed czynnikami alkilującymi. Różnice w aktywności enzymu, wynikające z występowania wielu odmian polimorficznych jego genu, mogą prowadzić niekiedy do zwiększonego ryzyka zachorowania na nowotwory. Tematem pracy jest omówienie roli niektórych polimorfizmów genu MGMT w rozwoju oraz terapii chorób nowotworowych.
Cell DNA is constantly exposed to mutagenic factors. DNA repair mechanisms are very important to provide proper cell functioning and proliferation control. One of the DNA repair mechanisms is based on the O6-methylguanine-DNA methyltransferase enzyme, which provides protection against alkylating agents. Differences in MGMT enzyme activity may be caused by MGMT gene polymorphisms. MGMT polymorphisms may increase cancer risk, e.g. lung cancer or esophageal cancer. In this review we have described the role of some MGMT polymorphisms in cancer development and therapy.
Źródło:: Annales Academiae Medicae Silesiensis; 2017, 71; 378-382
1734-025X
Pojawia się w:: Annales Academiae Medicae Silesiensis
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Correlation of chromosome damage and promoter methylation status of the DNA repair genes MGMT and hMLH1 in Chinese vinyl chloride monomer (VCM)-exposed workers
Autorzy:: Wu, Fen
Liu, Jing
Qiu, Yu-Lan
Wang, Wei
Zhu, Shou-Min
Sun, Pin
Miao, Wen-Bin
Li, Yong-Liang
Brandt-Rauf, Paul W.
Xia, Zhao-Lin
Powiązania:: https://bibliotekanauki.pl/articles/2179802.pdf
Data publikacji:: 2013-03-01
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:: vinyl chloride monomer
chromosome damage
MGMT
hMLH1
DNA methylation
Opis:: Objective: To explore the association of the methylation status of MGMT and hMLH1 with chromosome damage induced by vinyl chloride monomer (VCM). Materials and Methods: Methylation of MGMT and hMLH1 was measured in 101 VCM-exposed workers by methylation-specifi c PCR. Chromosome damage in peripheral blood lymphocytes was measured by the cytokinesis-block micronucleus assay. The subjects were divided into chromosome damaged and non-damaged groups based on the normal reference value of micronuclei frequencies determined for two control groups. Results: MGMT promoter methylation was detectable in 5 out of 49 chromosome damaged subjects, but not in the chromosome non-damaged subjects; there was a signifi cant difference in MGMT methylation between the two groups (p < 0.05). Conclusions: We detected aberrant promoter methylation of MGMT in a small number of chromosome damaged VCM-exposed workers, but not in the chromosome non-damaged subjects. This preliminary observation warrants further investigation in a larger study.
Źródło:: International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 173-182
1232-1087
1896-494X
Pojawia się w:: International Journal of Occupational Medicine and Environmental Health
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Expression profiles of MGMT, p16, and APC genes in tumor and matching surgical margin from patients with oral squamous cell carcinoma
Autorzy:: Strzelczyk, Joanna
Gołąbek, Karolina
Krakowczyk, Łukasz
Owczarek, Aleksander
Powiązania:: https://bibliotekanauki.pl/articles/1038771.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: HNSCC
gene expression
surgical margin
MGMT
p16
APC
Opis:: The aim of the study was to assess the expression of MGMT, p16, and APC genes in tumors and matching surgical margin samples from 56 patients with primary OSCC. We also analyzed the association of the clinical variables with the expression of the studied genes. After RNA isolation and cDNA synthesis gene expression levels were assessed by quantitative reverse transcription (qRT)-PCR. Two-sided parametrical Student's t-test for independent groups with equal/unequal variances showed no statistically significant differences in genes' expression in tumor compared to margin samples. No association was found between the genes' expression and clinical parameters, except for MGMT, whose low expression was probably associated with smoking (0.87 vs 1.34, p=0.065). 'Field cancerization' is an area with genetically or epigenetically altered cells and at the same time a risk factor for cancer. Disturbances in gene expression could also be the source of damages leading to cancerization. In conclusion, it is important to mention that the field remaining after a surgery may pose an increased risk of cancer development. It may be suggested that the diagnosis and treatment of cancers should not be concentrated only on the tumor itself, but also on the cancer field effect. Therefore, further molecular analysis on surgical margins and additional research regarding their assessment are required.
Źródło:: Acta Biochimica Polonica; 2016, 63, 3; 505-509
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The role of MGMT polymorphisms rs12917 and rs11016879 in head and neck cancer risk and prognosis
Autorzy:: Kiczmer, Paweł
Prawdzic Seńkowska, Alicja
Strzelczyk, Joanna
Szydło, Błażej
Biernacki, Krzysztof
Osadnik, Tadeusz
Krakowczyk, Łukasz
Ostrowska, Zofia
Powiązania:: https://bibliotekanauki.pl/articles/1038528.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: MGMT
head and neck cancer
polymorphism
rs12917
rs11016879
Opis:: Head and neck squamous cell carcinoma (HNSCC) is one of the leading cancers by incidence worldwide. The risk of these cancers is strictly associated with alkylation factors present in tobacco smoke. The crucial role in preventing DNA alkylation is played by O6-methylguanine-DNA methyltransferase (MGMT). Dysfunction or lack of MGMT is associated with an increased risk of cancer. The aim of the study was to assess the influence of MGMT polymorphisms: rs12917 and rs11016879 on HNSCC risk and course. The study consisted of 69 HNSCC patients and 242 healthy individuals. Case samples were taken from resected tumour tissue. The control group comprised samples of epithelial cells collected from mucous membranes using swabs. DNA samples were genotyped by employing the 5' nuclease assay for allelic discrimination using TaqMan SNP Genotyping Assays. The significance between distributions of genotypes and alleles was tested using Pearson's χ2 test analysis. Our results indicated that the MGMT rs12917 TT genotype increases the risk of HNSCC. The MGMT rs11016879 AG genotype and A allele were associated with increased HNSCC risk. We noted higher risk of nodal metastasis in rs11016879 AA homozygotes. Mechanisms leading to MGMT enzymatic defect are unknown and hence further studies need to be carried out. Our data suggest that the examined polymorphisms may be considered as potential prognostic factors for HNSCC risk and outcome. Further studies are necessary to verify our results.
Źródło:: Acta Biochimica Polonica; 2018, 65, 1; 87-92
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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