1. Artificial biomimetic electrochemical assembliesTanja Zidarič, Matjaž Finšgar, Uroš Maver, Tina Maver, 2022, review article Abstract: Rapid, selective, and cost-effective detection and determination of clinically relevant
biomolecule analytes for a better understanding of biological and physiological functions are becoming increasingly prominent. In this regard, biosensors represent a powerful tool to meet these
requirements. Recent decades have seen biosensors gaining popularity due to their ability to design
sensor platforms that are selective to determine target analytes. Naturally generated receptor units
have a high affinity for their targets, which provides the selectivity of a device. However, such
receptors are subject to instability under harsh environmental conditions and have consequently low
durability. By applying principles of supramolecular chemistry, molecularly imprinted polymers
(MIPs) can successfully replace natural receptors to circumvent these shortcomings. This review summarizes the recent achievements and analytical applications of electrosynthesized MIPs, in particular,
for the detection of protein-based biomarkers. The scope of this review also includes the background
behind electrochemical readouts and the origin of the gate effect in MIP-based biosensors.
Keywords: MIP-based biosensors, MIP, biosensors, molecularly imprinted polymer, biomolecules, electroanalysis
Published in DKUM: 15.05.2025; Views: 0; Downloads: 0
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2. Razvoj in vitro modela kožeMaja Sever, Dominik Škrinjar, 2024, final research report Abstract: Tridimenzionalni (3D) biotiskani modeli kože se vse bolj uveljavljajo v predkliničnih in kliničnih raziskavah kot alternativa testiranju na živalih. Ključno za uspeh teh raziskav je zagotavljanje ponovljivosti in primerljivosti rezultatov, kar zahteva razvoj zanesljivih hidrogelov, ki omogočajo stabilno vključitev celic v 3D biotisk. Eden največjih izzivov pri tem je zagotavljanje konsistentnosti lastnosti hidrogela, ki je temeljni material za izdelavo 3D tiskanega in vitro modela kože, potrebnega za različne faze raziskav. Namen te raziskave je bil preučiti možnost priprave večje serije hidrogela ter raziskati načine njihovega dolgoročnega shranjevanja, s poudarkom na tehnikah zamrzovanja, z namenom ohranitve njihovih fizikalno-kemijskih lastnosti. Tako bi omogočili uporabo enotne serije hidrogela skozi celoten razvoj in vitro modela kože, kar bi zmanjšalo variacije, ki nastajajo pri posameznih pripravah hidrogelov za različne raziskovalne metode. Osredotočili smo se na vpliv temperature (-20 °C in -80 °C) ter trajanja shranjevanja (7 in 29 dni) na ključne lastnosti hidrogelov, kot so viskoznost, poroznost, sposobnost nabrekanja, degradacija in mehanske lastnosti po odmrznitvi. Potrditev teh hipotez bi prispevala k večji ponovljivosti in natančnosti 3D biotiskljivih in vitro modelov kože.
Keywords: in vitro model kože, 3D biotiskanje, hidrogel, predkinična in klinična raziskava
Published in DKUM: 24.01.2025; Views: 0; Downloads: 10
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3. Development of biomimetic sensors to determine the functionality of in vitro cell modelsMatjaž Frangež, Noah Emil Glisik, Maša Kaiser, Jaro Vezjak, Matic Žnidaršič, Tanja Zidarič, Tina Maver, 2024, original scientific article Abstract: Advances in biomedical science have enabled the development of in vitro models that mimic human tissues. Non-invasive real-time monitoring of these models would provide valuable insights without disrupting the cellular environment. This study explores the use of molecularly imprinted polymers (MIPs) for this purpose, focusing on insulin and lactate as biomarkers of cellular metabolism. MIP sensors were created by electropolymerizing pyrrole around insulin or lactate templates on carbon electrodes. The sensors showed high sensitivity and selectivity, with detection ranges of 20.0–70.0 pM for insulin (LOD: 2.41 pM) and 0.5–3.0 mM for lactate. These findings highlight MIPs’ potential for personalized diagnostics and therapy monitoring.
Keywords: biomimetic sensors, molecular imprinting, polypyrrole matrix, insulin, MIP sensor
Published in DKUM: 24.01.2025; Views: 0; Downloads: 13
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4. Kratek pregled platform za ADME testiranjeTina Maver, Boštjan Vihar, Uroš Maver, 2024, original scientific article Abstract: V zadnjem času je bil dosežen pomemben napredek pri razvoju ADME (absorpcija, distribucija, metabolizem, ekskrecija) modelov, vendar izziv ostaja vzpostaviti platforme, ki bi zmanjšale testiranje na živalih in stroške raziskav. Naraščajoča pomembnost farmakokinetičnih interakcij poudarja potrebo po zanesljivih in
ponovljivih ADME modelih, ki so vse bolj ključni za razvoj zdravil in zagotavljanje varnosti z željo po preprečevanju
resnih kliničnih zapletov in hospitalizacije.
Keywords: ADME, drug interaction studies, in vitro models, pharmacokinetics, multi-organ models
Published in DKUM: 07.01.2025; Views: 0; Downloads: 21
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5. Advanced bio-based polymers for astrocyte cell modelsLidija Gradišnik, Roman Bošnjak, Tina Maver, Tomaž Velnar, 2021, review article Abstract: The development of in vitro neural tissue analogs is of great interest for many biomedical engineering applications, including the tissue engineering of neural interfaces, treatment of neurodegenerative diseases, and in vitro evaluation of cell-material interactions. Since astrocytes play a crucial role in the regenerative processes of the central nervous system, the development of biomaterials that interact favorably with astrocytes is of great research interest. The sources of human astrocytes, suitable natural biomaterials, guidance scaffolds, and ligand patterned surfaces are discussed in the article. New findings in this field are essential for the future treatment of spinal cord and brain injuries.
Keywords: astrocytes, hydrogels, tissue engineering
Published in DKUM: 14.08.2024; Views: 118; Downloads: 8
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6. Novel methacrylate-based multilayer nanofilms with incorporated FePt-based nanoparticles and the anticancer drug 5-fluorouracil for skin cancer treatmentKristijan Skok, Tanja Zidarič, Kristjan Orthaber, Matevž Pristovnik, Nina Kostevšek, Kristina Žužek Rožman, Sašo Šturm, Lidija Gradišnik, Uroš Maver, Tina Maver, 2022, original scientific article Abstract: Despite medical advances, skin-associated disorders continue to pose a unique challenge to physicians worldwide. Skin cancer is one of the most common forms of cancer, with more than one million new cases reported each year. Currently, surgical excision is its primary treatment; however, this can be impractical or even contradictory in certain situations. An interesting potential alternative could lie in topical treatment solutions. The goal of our study was to develop novel multilayer nanofilms consisting of a combination of polyhydroxyethyl methacrylate (PHEMA), polyhydroxypropyl methacrylate (PHPMA), sodium deoxycholate (NaDOC) with incorporated superparamagnetic iron–platinum nanoparticles (FePt NPs), and the potent anticancer drug (5-fluorouracil), for theranostic skin cancer treatment. All multilayer systems were prepared by spin-coating and characterised by atomic force microscopy, infrared spectroscopy, and contact angle measurement. The magnetic properties of the incorporated FePt NPs were evaluated using magnetisation measurement, while their size was determined using transmission electron microscopy (TEM). Drug release performance was tested in vitro, and formulation safety was evaluated on human-skin-derived fibroblasts. Finally, the efficacy for skin cancer treatment was tested on our own basal-cell carcinoma cell line.
Keywords: nanomaterials, bimodal therapy, topical skin treatmen, magnetic nanoparticles, thin films, skin cancer, methacrylates
Published in DKUM: 04.07.2024; Views: 98; Downloads: 17
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7. Magnetic nanoparticles in 3D-printed scaffolds for biomedical applicationsNina Marovič, Irena Ban, Uroš Maver, Tina Maver, 2023, review article Keywords: magnetic nanoparticles, 3D-printed scaffolds, iron oxide nanoparticles, mechanical properties, cellular responses
Published in DKUM: 20.05.2024; Views: 195; Downloads: 13
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8. Multilayer methacrylate-based wound dressing as a therapeutic tool for targeted pain reliefTanja Zidarič, Kristijan Skok, Kristjan Orthaber, Matevž Pristovnik, Lidija Gradišnik, Tina Maver, Uroš Maver, 2023, original scientific article Abstract: This study presents an innovative wound dressing system that offers a highly effective therapeutic solution for treating painful wounds. By incorporating the widely used non-steroidal anti-inflammatory drug diclofenac, we have created an active wound dressing that can provide targeted pain relief with ease. The drug was embedded within a biocompatible matrix composed of polyhydroxyethyl methacrylate and polyhydroxypropyl methacrylate. The multilayer structure of the dressing, which allows for sustained drug release and an exact application, was achieved through the layer-by-layer coating technique and the inclusion of superparamagnetic iron platinum nanoparticles. The multilayered dressings’ physicochemical, structural, and morphological properties were characterised using various methods. The synergistic effect of the incorporated drug molecules and superparamagnetic nanoparticles on the surface roughness and release kinetics resulted in controlled drug release. In addition, the proposed multilayer wound dressings were found to be biocompatible with human skin fibroblasts. Our findings suggest that the developed wound dressing system can contribute to tailored therapeutic strategies for local pain relief.
Keywords: wound dressings, pain relief, superparamagnetic nanoparticles, methacrylate
Published in DKUM: 19.04.2024; Views: 485; Downloads: 470
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9. Development of a novel NiCu nanoparticle-loaded polysaccharide-based hydrogel for 3D printing of customizable dressings with promising cytotoxicity against melanoma cellsLaura Činč Ćurić, Maša Šuligoj, Maja Ibic, Nina Marovič, Boštjan Vihar, Matej Vesenjak, Polona Dobnik-Dubrovski, Nejc Novak, Janja Stergar, Irena Ban, Uroš Maver, Marko Milojević, Tina Maver, 2023, original scientific article Keywords: nanoparticle-loaded hydrogels, 3D printed dressings, polysaccharides, nickel-copper nanoparticles, cytotoxic activity
Published in DKUM: 03.04.2024; Views: 260; Downloads: 278
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10. The development of an electropolymerized, molecularly imprinted polymer (MIP) sensor for insulin determination using single-drop analysisTanja Zidarič, David Majer, Tina Maver, Matjaž Finšgar, Uroš Maver, 2023, original scientific article Abstract: An electrochemical sensor for the detection of insulin in a single drop (50 μL) was developed based on the concept of molecularly imprinted polymers (MIP). The synthetic MIP receptors were assembled on a screen-printed carbon electrode (SPCE) by the electropolymerization of pyrrole (Py) in the presence of insulin (the protein template) using cyclic voltammetry. After electropolymerization, insulin was removed from the formed polypyrrole (Ppy) matrix to create imprinting cavities for the subsequent analysis of the insulin analyte in test samples. The surface characterization, before and after each electrosynthesis step of the MIP sensors, was performed using atomic force microscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The performance of the developed MIP–SPCE sensor was evaluated using a single drop of solution containing K3Fe(CN)6 and the square-wave voltammetry technique. The MIP–SPCE showed a linear concentration range of 20.0–70.0 pM (R2 = 0.9991), a limit of detection of 1.9 pM, and a limit of quantification of 6.2 pM. The rapid response time to the protein target and the portability of the developed sensor, which is considered a disposable MIP-based system, make this MIP–SPCE sensor a promising candidate for point-of-care applications. In addition, the MIP–SPCE sensor was successfully used to detect insulin in a pharmaceutical sample. The sensor was deemed to be accurate (the average recovery was 108.46%) and precise (the relative standard deviation was 7.23%).
Keywords: electrochemical sensors, electropolymerisation, electron microscopy
Published in DKUM: 14.03.2024; Views: 335; Downloads: 46
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