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Antimicrobial coatings as a promising prevention strategy of implants infections triggered by Staphylococcus aureus

100%
Malicki M., Bielec F., Brauncajs M., Pastuszak-Lewandoska D.
Alergia Astma Immunologia - przegląd kliniczny
|
2023
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vol. 28
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issue 1
2-7
PL
Postęp technologiczny w tworzeniu różnego typu implantów jest jednym z największych osiągnięć współczesnej chirurgii. Takie urządzenia mogą zastąpić lub przywrócić funkcję uszkodzonych tkanek, co znacząco poprawia jakość i długość życia pacjentów. Niestety infekcje są głównym powodem usuwania implantów. Pacjenci wymagają też zazwyczaj trudnego i kosztownego leczenia. Gronkowiec złocisty jest najczęściej wykrywanym patogenem w tego typu powikłaniach. Powoduje to, że metody profilaktyczne zyskują na atrakcyjności. Najważniejszymi technikami umożliwiającymi zapobieganie infekcjom implantów są pokrycia przeciwdrobnoustrojowe. Dzięki nim biomateriały, z których otrzymywane są urządzenia medyczne mogą uzyskać właściwości antyadhezyjne i bakteriobójcze. W niniejszej pracy dokonujemy przeglądu obiecujących metod tworzenia takich pokryć. Większość koncepcji dotyczy pokrywania implantów substancjami bakteriobójczymi, takimi jak antybiotyki czy nanocząsteczki srebra. Co ciekawe, nawet zmiany w topografii powierzchni mogą być konieczne, aby skutecznie zapobiec adhezji gronkowca złocistego.
EN
Technological progress in the development of various types of implants is one of the greatest achievements of contemporary surgery. Such devices can replace or restore the function of damaged tissues, significantly improving people’s quality of life and its longevity. Unfortunately, infections are the main reason for removing implants from patients who usually then need expensive and challenging treatment. Staphylococcus aureus is the most frequent pathogen detected in such complications. Therefore, prevention methods become more attractive. Antimicrobial coatings are the most important techniques to prevent implant infections. They give the biomaterials from which medical devices are obtained antiadhesive and antibacterial properties. In this paper, we review promising methods of creating such coatings. The majority of concepts are about covering implants with germicidal substances like antibiotics or silver nanoparticles. Interestingly, even changes in the surface topography may be necessary to prevent Staphylococcus aureus adhesion effectively
2
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CTLA-4 polymorphisms (+49 A/G and -318 C/T) are important genetic determinants of AITD susceptibility and predisposition to high levels of thyroid autoantibodies in Polish children - preliminary study

64%
Pastuszak-Lewandoska D., Domańska D., Rudzińska M., Bossowski A., Kucharska A., Sewerynek E., Czarnecka K., Migdalska-Sęk M., Czarnocka B.
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2013
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vol. 60
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issue 4
641-646
EN
Autoimmune thyroid diseases (AITDs), including Hashimoto' s thyroiditis (HT) and Graves' disease (GD), are related to environmental and genetic factors. We analyzed the association of cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) gene two polymorphisms (+49 A/G, -318 C/T) with HT and GD development in Polish children, and correlated both polymorphisms with the production of thyroid autoantibodies (TPOAb and TgAb). The study involved 49 AITD patients (age 10-19) with HT (n=25) or GD (n=24) and 69 healthy controls. SNP genotyping was performed using genomic DNA and TaqMan® probes. The obtained results indicated that CTLA-4 +49 GG genotype was significantly more frequent in both HT and GD patients, whereas the AA genotype was more common in controls. CTLA-4-318 CT genotype was significantly more frequent in AITD, and the CC genotype more often occurred in controls. Significantly higher median TPOAb and TgAb values were associated with G allele in HT, and with T allele in GD patients. Concluding, both studied polymorphisms seem to be important genetic determinants of the risk of HT and GD, and appear to be associated with a predisposition to high levels of TAbs and clinical AITD. The obtained results give more information on the distribution of the CTLA-4 polymorphism in Polish AITD children, and further support the proposal that the CTLA-4 gene plays an important role in a TAb production.
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