Przeglądanie według Autor "Tutka, Piotr"

Aktualnie wyświetlane 1 - 3 z 3

19F MRI As a tool for imaging drug delivery to tissue and individual cells
(Wydawnictwo Uniwersytetu Rzeszowskiego, 2017) Bober, Zuzanna; Aebisher, David; Ożóg, Łukasz; Tabarkiewicz, Jacek; Tutka, Piotr; Bartusik-Aebisher, Dorota
Over the past few decades, magnetic resonance imaging (MRI) has proven to be extremely successful in medical applications. More recently, the biomedical applications of MRI have been gaining more use in the field of clinical pharmacy. In 1977, perfluorocarbon compounds (PFC), which form emulsions that can carry drugs, were analyzed by 19F MRI and emulsified PFC compounds have been investigated as potential blood substitutes since the early 1960s and now a wide variety of PFC compounds are currently available as 19F MRI biomarkers. Molecules with 19F substituents are particularly attractive for use in drug tracking by 19F MRI due to 100% 19F abundance, high 19F MRI sensitivity (0.83 relative to 1H MRI) and an impressively large chemical shift range (400 ppm). Another benefit in the use of 19F MRI is a zero background signal in biological samples due to lack of endogenous fluorine. Therefore, drugs containing fluorine atom have potential for 19F MRI imaging drug delivery to tissue. This article will review recent developments in the use of 19F MRI in imaging drug delivery to tissue and individual cells.
Cytisine parameters measured in the 1.5 Tesla magnetic field
(Wydawnictwo Uniwersytetu Rzeszowskiego, 2020) Bober, Zuzanna; Galiniak, Sabina; Leksa, Dawid; Dynarowicz, Klaudia; Aebisher, David; Ostańska, Elżbieta; Czmil, Anna; Bar, Piotr; Bartusik-Aebisher, Dorota; Tutka, Piotr
Introduction. Cytisine, Cytisinum (C11H14N2O), is an organic chemical compound. Cytisine is heterotricyclic compound that is the toxic principle in Laburnum seeds and is found in many members of the Fabaceae (legume, pea or bean) family. Aim. The aim of the study is to measure the influence of water on the form of drug in the magnetic field 1.5 Tesla. Material and methods. For this purpose, magnetic resonance imaging tests were performed to check the solubility of pure cytisine, Desmoxan tablets and Tabex capsules. Results. From a pharmacological point of view, both Desmoxan tablets and Tabex capsules should exert the same effect on the human body, this is due to the identical content of the active substance, in this case cytisine (1.5 mg). Conclusion. The differences in the results obtained may be related to additional excipients that contain medications, but it is believed that they should not have a negative impact on the action of the active substance.
Investigation of pharmaceuticals by nuclear magnetic resonance imaging and spectroscopy
(Wydawnictwo Uniwersytetu Rzeszowskiego, 2017) Bober, Zuzanna; Aebisher, David; Tabarkiewicz, Jacek; Guz, Wiesław; Tutka, Piotr; Bartusik-Aebisher, Dorota
Currently, new and easier ways of analyzing pharmaceutical drug forms and drug delivery mechanisms are being sought. Magnetic resonance imaging (MRI) is a non-invasive imaging technique that images drug forms such as tablets, liquids and topicals and drug form behavior in living organisms on both the tissue and cellular scale. The advantages of MRI include noninvasiveness, variable sample capacity and ease of transfer of phantom results to in vitro and in vivo studies. This review concerns the usefulness of clinical MRI that cannot be understated as this technique provides non-invasive and non-destructive insight into the properties of drug delivery systems. The research discussed here concerns the use of magnetic resonance, spectroscopy and chromatography to investigate selected pharmaceuticals and covers work of selecting drugs and antibodies for modification by synthesis for evaluation by MRI. Modifications have been aimed at improving therapeutic efficacy, delivery, and MRI. Modification conditions such as (pH, concentration, temperature, and the influence of other components present in the solutions) will be discussed to understand drug delivery system improvements and the reliability and repeatability of the results obtained. We hope to explore and expand the scope of pharmaceutical imaging with MRI for application in clinical medicine.