Autor: Gosiewski, Tomasz - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Role of gut microbiota in pathogenesis of selected chronic diseases
Autorzy:: Krawczyk, Agnieszka
Salamon, Dominika
Gosiewski, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/1065421.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: autoimmune disease
gut microbiota
immune system response
metabolic disease
Opis:: The human digestive system is colonized by a huge number of microorganisms, that are referred to collectively as the gut microbiota. The composition of intestinal microorganisms are shaped from an early life and undergoes constant changes depending on the influence of external factors, such as: type of delivery, feeding the young child, diet in subsequent years of life, pharmaceuticals use, stress, lifestyle or infections and previous inflammation within the digestive tract. Despite transient changes in microbiota composition, the intestinal ecosystem is constantly striving to maintain homeostasis, both qualitative and quantitative, which is fundamental to human health and human development. Microbes present in the intestines are responsible for sealing the intestinal barrier, mucin production, stimulation of the angiogenesis process, supporting digestive processes by fermentation and decomposition of undigested food residues, vitamin production or protection from pathogenic microorganisms. As shown by numerous studies carried out in recent years, intestinal dysbiosis plays a fundamental role in the development of many chronic diseases such as inflammatory bowel disease, diabetes, obesity, celiac disease, connective tissue diseases and others. Insightful understanding of the interactions between microorganisms and the host organisms can provide new information about pathogenesis of diseases as well as new ways to prevent and treat intestinal or systemic disorders. The aim of this work is to review the latest reports on the role of the gastrointestinal microbiome in selected chronic diseases.
Źródło:: World Scientific News; 2019, 132; 132-154
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Zastosowanie metod PCR i FISH w szybkiej diagnostyce bakteryjnych zakażeń krwi
Use of PCR and FISH methods for rapid identifi cation of bacterial bloodstream infections
Autorzy:: Gosiewski, Tomasz
Pietrzyk, Agata
Brzychczy-Włoch, Monika
Heczko, Piotr B.
Powiązania:: https://bibliotekanauki.pl/articles/1038423.pdf
Data publikacji:: 2011
Wydawca:: Śląski Uniwersytet Medyczny w Katowicach
Tematy:: diagnostyka sepsy
hodowla krwi
pcr
inhibicja pcr
fish
diagnostics of sepsis
blood culture
pcr inhibition
Opis:: INTRODUCTION The aim of this study was to evaluate the possibility of applying PCR and FISH methods in rapid diagnostics of bacterial bloodstream infections. MATERIAL AND METHODS 56 samples: 28 venous blood samples and 28 samples of culture media from BACTEC machine after incubation cycle were tested. All blood samples originated from patients with clinical symptoms of sepsis who were diagnosed in the Laboratory of Microbiological Diagnostics at the Chair of Microbiology Medical College Jagiellonian University in Krakow. The blood samples were tested to presence of bacteria in parallel, using PCR, FISH and culture monitored BACTEC system. Additionally, each bottle with medium was analyzed by FISH method. DNA was extracted with QIAamp DNA Blood Mini (Qiagen). To remove PCR inhibitors the step of samples purifi cation with ammonium chloride was added. For PCR reaction a pair of 16SrRNA(+) and 16SrRNA(-) starters which enables detection of all bacteria species was applied. In FISH method a probe specifi c to all bacteria species EUB338 and probes specifi c to Enterobacteriaceae (ENT183) and Staphylococcus genus (STA) were used. RESULTS Percentage of positive venous blood samples for PCR, FISH and BACTEC was: 71.4%, 28.6% and 10.7%, respectively. The diff erences between results obtained by PCR and FISH methods and by PCR and BACTEC were statistically signifi cant. In case of culture media samples analysis a percentage of positive results for FISH was 58.3%, while for culture method 33.3%. This diff erence was not statistically signifi cant. The time needed to receive a results of samples examination using PCR and FISH methods was about 4–5 hours. DNA amplifi cation was obtainable only for these blood samples which were in addition initially purifi ed, and special cellular sediment washing procedure was used. For unpurifi ed samples inhibition eff ect was noted. Conclusions Results obtained by us indicated that PCR and FISH methods: allow to detect bacteria in whole blood samples, are much more sensitive than culture method, shorten waiting time for results to few hours and that the use of additional procedure of blood samples purifi cation is needed to receive a positive result of amplification.
WSTĘP Celem pracy była ocena możliwości zastosowania metod PCR i FISH w szybkiej diagnostyce bakteryjnych zakażeń krwi. MATERIAŁ I METODY Analizie poddano 56 próbek: 28 próbek krwi żylnej i 28 próbek podłoży hodowlanych. Wszystkie próbki krwi pochodziły od pacjentów z klinicznymi objawami sepsy, diagnozowanych w Pracowni Diagnostyki Mikrobiologicznej Katedry Mikrobiologii Collegium Medicum Uniwersytetu Jagiellońskiego w Krakowie. Pobrane próbki krwi badano na obecność bakterii, równolegle w systemie hodowli monitorowanej BACTEC oraz za pomocą metod PCR (polymerase chain reaction) i FISH (fl uorescent in situ hydridization). Dodatkowo, każdą butelkę z podłożem poddawano analizie za pomocą metody FISH. Izolację DNA prowadzono przy użyciu zestawu QIAamp DNA Blood Mini. W celu usunięcia inhibitorów PCR wprowadzono etap oczyszczania próbek chlorkiem amonu. Do reakcji PCR wykorzystano parę starterów 16SrRNA(+) i 16SrRNA(-) umożliwiającą wykrycie wszystkich gatunków bakterii. W metodzie FISH wykorzystano sondę EUB338 swoistą dla wszystkich gatunków bakterii oraz sondy swoiste dla Enterobacteriaceae (ENT183) i rodzaju Staphylococcus (STA). WYNIKI Odsetek wyników dodatnich dla próbek krwi żylnej wynosił: 71,4%, 28,6% i 10,7% odpowiednio dla PCR, FISH i BACTEC. Różnice między wynikami uzyskanymi za pomocą metod PCR i FISH oraz PCR i BACTEC były statystycznie istotne. W przypadku analizy próbek podłóż hodowlanych, odsetek wyników dodatnich dla metody FISH wynosił 58,3%, natomiast dla metody hodowlanej 33,3%. Różnica ta nie była statystycznie istotna. Czas potrzebny do uzyskania wyników badań prowadzonych za pomocą metod PCR i FISH wynosił około 4–5 godzin. Amplifikacja DNA była możliwa jedynie dla próbek krwi poddanych dodatkowo wstępnej procedurze oczyszczania i przepłukiwania osadu komórkowego. W pozostałych przypadkach obserwowano efekt inhibicji. WNIOSKI Uzyskane wyniki wykazały, że metody PCR i FISH pozwalają na wykrycie obecności bakterii w próbkach pełnej krwi, są bardziej czułe od metody hodowlanej, skracają czas oczekiwania na wynik do kilku godzin, zaś reakcja amplifi kacji wymaga zastosowania dodatkowej procedury oczyszczania próbek krwi.
Źródło:: Annales Academiae Medicae Silesiensis; 2011, 65, 5-6; 14-22
1734-025X
Pojawia się w:: Annales Academiae Medicae Silesiensis
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Evaluation of the activity of thermostable DNA polymerases in the presence of heme, as a key inhibitor in the real time PCR method in diagnostics of sepsis
Autorzy:: Gosiewski, Tomasz
Brzychczy-Włoch, Monika
Pietrzyk, Agata
Sroka, Agnieszka
Bulanda, Małgorzata
Powiązania:: https://bibliotekanauki.pl/articles/1039451.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: polymerase inhibitor
heme
real time PCR
sepsis
Opis:: The study aim was evaluation of the usefulness of several thermostable DNA polymerases in real time PCR conducted in the presence of the heme. Our study had the advantage of testing several different polymerases, one of which proved to be the least sensitive to heme activity. We also found that there is no need of supplementing the reaction mixture with protective substances like BSA. Selection of the appropriate polymerase can increase the efficiency of the PCR reaction which is very important for diagnosis of sepsis and for other analyses performed on DNA template isolated from the blood.
Źródło:: Acta Biochimica Polonica; 2013, 60, 4; 603-606
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Impact of biological treatment on intestinal microbiom in children with Crohn’s disease
Autorzy:: Krawczyk, Agnieszka
Sroka-Oleksiak, Agnieszka
Kowalska-Duplaga, Kinga
Fyderek, Krzysztof
Gosiewski, Tomasz
Salamon, Dominika
Powiązania:: https://bibliotekanauki.pl/articles/1177355.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Crohn’s disease
biological treatment
children
gut microbiota
Opis:: Crohn’s disease (CD) is a chronic, inflammatory illness of the digestive tract, characterized by alternating periods of remission and recurrence. The pathogenesis of CD is still unclear but probably is a result of a complex interaction between immunological, genetic and microbiological disorders. In recent years, there has been an increasing extent of evidence that gut microbiota plays a very important role in the pathogenesis of CD. Currently, the most effective treatment is biological therapy using anti-TNF monoclonal antibodies. It is interesting whether biological drugs resulting in fast remission, contributes to the normalization of the gut microbiota. Due to the fact that the children’s population is a significant percentage of all patients with CD, it is important to pay close attention to the problem of microbiological disorders in this age group. The aim of this study was to investigate whether there are quantitative changes of chosen bacteria species and fungi of the genus Candida in children with Crohn's disease relative to healthy children and assesment of quantitative changes in patients after biological treatment. In the group of children with Crohn’s disease, the numbers in Candida were significantly higher (9.74×1017 CFU/g) than in the control group (9.35×1010 CFU/g, p = 0.011). Biological therapy led to a significant reduction in the amount Candida (5.91×1011) and was comparable with the number in the control group. In the case of bacteria, we observed an increase in S. marcescens (3,4×108) in the patients group compared to the controls (1,85×108) and an increase in L. fermentum (2,34×1010) in relation to healthy children (3,31×108, p = 0,048) Biological treatment had an impact on the decrease in L. fermentum (4,76×109, p = 0.05).
Źródło:: World Scientific News; 2018, 104; 245-256
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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