Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "variants" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Potential protein activity modifications of amino acid variants in the human transcriptome
Autorzy:
Zyla, Joanna
Bulman, Robert
Badie, Christophe
Bouffler, Simon
Powiązania:
https://bibliotekanauki.pl/articles/1039132.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
RNA editing
amino acid variants
Opis:
Background: The occurrence of widespread RNA and DNA sequence differences in the human transcriptome was reported in 2011. Similar findings were described in a second independent publication on personal omics profiling investigating the occurrence of dynamic molecular and related medical phenotypes. The suggestion that the RNA sequence variation was likely to affect disease susceptibility prompted us to investigate with a range of algorithms the amino acid variants reported to be present in the identified peptides to determine if they might be disease-causing. Results: The predictive qualities of the different algorithms were first evaluated by using nonsynonymous single-base nucleotide polymorphism (nsSNP) datasets, using independently established data on amino acid variants in several proteins as well as data obtained by mutational mapping and modelling of binding sites in the human serotonin transporter protein (hSERT). Validation of the used predictive algorithms was at a 75% level. Using the same algorithms, we found that widespread RNA and DNA sequence differences were predicted to impair the function of the peptides in over 57% of cases. Conclusions: Our findings suggest that a proportion of edited RNAs which serve as templates for protein synthesis is likely to modify protein function, possibly as an adaptive survival mechanism in response to environmental modifications.
Źródło:
Acta Biochimica Polonica; 2015, 62, 1; 57-61
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Native nucleic acid electrophoresis as an efficient alternative for genotyping method of influenza virus
Autorzy:
Pajak, Beata
Lepek, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1039250.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
gel electrophoresis
SSCP
influenza
minor genetic variants
Opis:
Influenza viruses are the worldwide major causative agents of human and animal acute respiratory infections. Some of the influenza subtypes have caused epidemics and pandemics among humans. The varieties of methods are available for the rapid isolation and identification of influenza viruses in clinical and environmental samples. Since nucleic acids amplification techniques such as RT-PCR have been adapted, fast and sensitive influenza type and subtype determination is possible. However, in some ambiguous cases other, more detailed assay might be desired. The genetic material of influenza virus is highly unstable and constantly mutates. It is known that single nucleotide polymorphisms (SNPs) results in resistance to commercially available anti-viral drugs. The genetic drift of the virus could also result in weakening of immune response to infection. Finally, in a substantial number of patients co-infection with various virus strains or types has been confirmed. Although the detection of co-infection or presence of minor genetic variants within flu-infected patients is not a routine procedure, a rapid and wide spectrum diagnostics of influenza virus infections could reveal an accurate picture of the disease and more importantly, is crucial for choosing the appropriate therapeutics and virus monitoring. Herein we present the evidences that native gel electrophoresis and MSSCP - a method based on multitemperature single strand conformation polymorphism could furnish a useful technique for minor variants, which escape discovery by conventional diagnostic assays.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 479-483
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlation between butyrylcholinesterase variants and sensitivity to soman toxicity
Autorzy:
Dimov, Dimo
Kanev, Kamen
Dimova, Ivanka
Powiązania:
https://bibliotekanauki.pl/articles/1039756.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
enzyme inhibition/reactivation
soman toxicity
Butyrylcholinesterase variants
Opis:
Butyrylcholinesterase (BChE) is synthesized in the liver and found in high concentrations in blood plasma, liver, heart, pancreas, vascular endothelium, skin, brain white matter, smooth muscle cells and adipocytes. BChE is a non specific enzyme that hydrolyzes different choline esters (succinylcholine, mivacurium) and many other drugs such as aspirin, cocaine and procaine. The enzyme is also considered as a bioscavenger due to its ability to neutralize the toxic effects of organophosphorus compounds (nervous system fs agents) such as soman. BChE displays several polymorphisms that influence its serum activity; therefore they could determine the individual sensitivity to chemical nerve agents. In this study, we investigated the correlation between BChE variants and the degree of enzyme inhibition and reactivation after soman application on blood samples of 726 individuals. The blood samples of individuals expressing abnormal variants, were more sensitive to soman compared to variants of homozygotes and heterozygotes for U-allele. We found significant differences in the degree of enzyme reactivation between different variants (with and without U-presence).
Źródło:
Acta Biochimica Polonica; 2012, 59, 2; 313-316
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Association between depression, parameters of adiposity and genetic polymorphisms of pro-inflammatory cytokines: IL-1α, IL-1β, IL-2 and IL-6 in subjects over 55 years old
Autorzy:
Adler, Grażyna
Skonieczna-Żydecka, Karolina
Madlani, Agnieszka
Ogonowski, Jarosław
Grochans, Elżbieta
Pierzak-Sominka, Joanna
Brodowski, Jacek
Karakiewicz, Beata
Powiązania:
https://bibliotekanauki.pl/articles/1038807.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cross sectional study
genetic variants of cytokines
obesity
depression
Opis:
Background. During the last few decades, adiposity has become a relatively common phenomenon worldwide. The available data on the effects of pro-inflammatory factors in both depression and adiposity has been attracting great attention. Aim. We sought to assess the prevalence of -889C>T IL-1α, -31T>C and -511C>T IL-1β, -330T>G IL-2 and -174G>C IL-6 genes and their association with adiposity and depression in Polish subjects. Methods. A cohort study was conducted in 2013/2014, covering a sample of 297 individuals (217 female and 80 male). Anthropometric data was handled using the BIA analysis method, while for genotyping PCR-RFLP techniques were used. Results. A positive correlation between depression and anthropometric parameters: adipose tissue (in kg) and adipose tissue (in %) (R=0.135 and p=0.02, R=0.114 and p<0.05, respectively) was found. No association between studied polymorphisms and depression was observed. Conclusion. Although it was not possible to demonstrate any influence of the studied polymorphisms as the genetic modulator of depression, authors believe that the presented data are noticeable and may provide the basis for future studies on larger groups.
Źródło:
Acta Biochimica Polonica; 2016, 63, 2; 253-259
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
HPV16 E6 polymorphism and physical state of viral genome in relation to the risk of cervical cancer in women from the south of Poland
Autorzy:
Szostek, Slawa
Zawilinska, Barbara
Klimek, Malgorzata
Kosz-Vnenchak, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/1038699.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
HPV type 16 E6 variants
HPV16 physical state
real-time PCR
squamous intraepithelial lesions
invasive cervical carcinoma
Opis:
The aim of this study was to analyse the correlation between HPV16 E6 variants and the physical status of viral genome (integrated, mixed, episomal) among patients with cervical cancer (n=40) and low-grade squamous intraepithelial lesions - LSIL (n=40). The study was performed on 80 HPV16 positive samples. HPV16 E6 variants were identified using PCR and DNA sequencing. Nucleotide sequences of E6 were compared with the prototype sequence (EUR-350T). The physical state of HPV DNA was determined as the ratio of E2/E6 copy number per cell. Twelve different intratypic variants were identified as belonging to European (in 77 samples) and North-American 1 (in 3 samples) sublineages. The most prevalent non-synonymous variant was EUR-350G, which occurred with similar frequency in cervical cancer and LSIL. The frequencies of additional mutations in variants with EUR-350T or EUR-350G sequences differed significantly. For the first time, missense mutations G122A, C153T and G188A were discovered in EUR-350G variant. The integrated viral genome was predominant in women with cervical cancer. The EUR-350T prototype and EUR-350G without additional mutations variants were prevalent in cervical cancer samples with the HPV16 characterized by integrated DNA. In summary, European variants of HPV16 E6 dominated in both cancer and LSIL group. The presence of EUR-350G favoured the occurrence of additional nucleotide changes. We showed that nucleotide changes occur significantly more often in the mixed form of viral DNA and in LSIL group and that the variants without additional mutations may promote integration of HPV16 genome.
Źródło:
Acta Biochimica Polonica; 2017, 64, 1; 143-149
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies