All Outputs (43)

Investigating the intracellular effects of hyperbranched polycation-DNA complexes on lung cancer cells using LC-MS-based metabolite profiling (2019)
Journal Article
Alazzo, A., Al-Natour, M., Spriggs, K., Stolnik, S., Ghaemmaghami, A., Kim, D., & Alexander, C. (2019). Investigating the intracellular effects of hyperbranched polycation-DNA complexes on lung cancer cells using LC-MS-based metabolite profiling. Molecular Omics, 15(1), 77-87. https://doi.org/10.1039/C8MO00139A

Cationic polymers have emerged as a promising alternative to viral vectors in gene therapy. They are cheap to scale up, easy to functionalise and also presume to be safer than the viral vectors, however many of them are cytotoxic. The large number of... Read More about Investigating the intracellular effects of hyperbranched polycation-DNA complexes on lung cancer cells using LC-MS-based metabolite profiling.

Exposure to a Nonionic Surfactant Induces a Response Akin to Heat-Shock Apoptosis in Intestinal Epithelial Cells: Implications for Excipients Safety (2019)
Journal Article
Cavanagh, R. J., Smith, P. A., & Stolnik, S. (2019). Exposure to a Nonionic Surfactant Induces a Response Akin to Heat-Shock Apoptosis in Intestinal Epithelial Cells: Implications for Excipients Safety. Molecular Pharmaceutics, 16(2), 618-631. https://doi.org/10.1021/acs.molpharmaceut.8b00934

© 2019 American Chemical Society. Amphipathic, nonionic, surfactants are widely used in pharmaceutical, food, and agricultural industry to enhance product features; as pharmaceutical excipients, they are also aimed at increasing cell membrane permeab... Read More about Exposure to a Nonionic Surfactant Induces a Response Akin to Heat-Shock Apoptosis in Intestinal Epithelial Cells: Implications for Excipients Safety.

Mammalian cell-driven polymerisation of pyrrole (2018)
Journal Article
Sherman, H. G., Jain, A., Stolnik, S., Alexander, C., Rawson, F. J., & Hicks, J. (2018). Mammalian cell-driven polymerisation of pyrrole. ChemBioChem, 20(8), 1008-1013. https://doi.org/10.1002/cbic.201800630

A model cancer cell line was used to initiate polymerisation of pyrrole to form the conducting material polypyrrole. The polymerisation was shown to occur via cytosolic exudates rather than via membrane redox sites which normally control the oxidatio... Read More about Mammalian cell-driven polymerisation of pyrrole.

New perspectives on iron uptake in eukaryotes (2018)
Journal Article
Sherman, H. G., Jovanovic, C., Stolnik, S., Baronian, K., Downard, A. J., & Rawson, F. J. (2018). New perspectives on iron uptake in eukaryotes. Frontiers in Molecular Biosciences, 5(NOV), Article 97. https://doi.org/10.3389/fmolb.2018.00097

All eukaryotic organisms require iron to function. Malfunctions within iron homeostasis have a range of physiological consequences, and can lead to the development of pathological conditions that can result in an excess of non-transferrin bound iron... Read More about New perspectives on iron uptake in eukaryotes.

Rapid formulation of redox-responsive oligo-?-aminoester polyplexes with siRNA via jet printing (2018)
Journal Article
Lovato, T., Taresco, V., Alazzo, A., Sansone, C., Stolnik, S., Alexander, C., & Conte, C. (2018). Rapid formulation of redox-responsive oligo-?-aminoester polyplexes with siRNA via jet printing. Journal of Materials Chemistry B, 6(41), 6550-6558. https://doi.org/10.1039/C8TB01215F

Here we describe a rapid inkjet formulation method for screening newly-synthesised cationic materials for siRNA delivery into cancer cells. Reduction responsive oligo-?-aminoesters were prepared and evaluated for their ability to condense siRNA into... Read More about Rapid formulation of redox-responsive oligo-?-aminoester polyplexes with siRNA via jet printing.

Structural variations in hyperbranched polymers prepared via thermal polycondensation of lysine and histidine and their effects on DNA delivery (2018)
Journal Article
Alazzo, A., Lovato, T., Collins, H. M., Taresco, V., Stolnik, S., Soliman, M. E., …Alexander, C. (2018). Structural variations in hyperbranched polymers prepared via thermal polycondensation of lysine and histidine and their effects on DNA delivery. Journal of Interdisciplinary Nanomedicine, 3(2), https://doi.org/10.1002/jin2.36

The successful clinical translation of non-viral gene delivery systems has yet to be achieved due to the biological and technical obstacles to preparing a safe, potent and cost-effective vector. Hyper-branched polymers have emerged as promising candi... Read More about Structural variations in hyperbranched polymers prepared via thermal polycondensation of lysine and histidine and their effects on DNA delivery.

Enhanced uptake in 2D- and 3D- lung cancer cell models of redox responsive PEGylated nanoparticles with sensitivity to reducing extra-and intracellular environments (2018)
Journal Article
Conte, C., Mastrotto, F., Taresco, V., Tchoryk, A., Quaglia, F., Stolnik, S., & Alexander, C. (2018). Enhanced uptake in 2D- and 3D- lung cancer cell models of redox responsive PEGylated nanoparticles with sensitivity to reducing extra-and intracellular environments. Journal of Controlled Release, 277, 126-141. https://doi.org/10.1016/j.jconrel.2018.03.011

In the treatment of lung cancer, there is an urgent need of innovative medicines to optimize pharmacological responses of conventional chemotherapeutics while attenuating side effects. Here, we have exploited some relatively unexplored subtle differe... Read More about Enhanced uptake in 2D- and 3D- lung cancer cell models of redox responsive PEGylated nanoparticles with sensitivity to reducing extra-and intracellular environments.

Water-soluble substituted chitosan derivatives as technology platform for inhalation delivery of siRNA (2018)
Journal Article
Capel, V., Vllasaliu, D., Watts, P., Clarke, P. A., Luxton, D., Grabowska, A. M., …Stolnik, S. (in press). Water-soluble substituted chitosan derivatives as technology platform for inhalation delivery of siRNA. Drug Delivery, 25(1), https://doi.org/10.1080/10717544.2018.1440668

Despite research efforts full potential of siRNA-based therapeutics has not yet been fully realized due to a need for suitable, effective delivery formulations. Here, we examine a potential of a new class of water-soluble chitosans as siRNA platform... Read More about Water-soluble substituted chitosan derivatives as technology platform for inhalation delivery of siRNA.

Pathways of cellular internalisation of liposomes delivered siRNA and effects on siRNA engagement with target mRNA and silencing in cancer cells (2018)
Journal Article
Alshehri, A. A., Grabowska, A. M., & Stolnik, S. (in press). Pathways of cellular internalisation of liposomes delivered siRNA and effects on siRNA engagement with target mRNA and silencing in cancer cells. Scientific Reports, 8(1), https://doi.org/10.1038/s41598-018-22166-3

Design of an efficient delivery system is a generally recognised bottleneck in translation of siRNA technology into clinic. Despite research efforts, cellular processes that determine efficiency of siRNA silencing achieved by different delivery formu... Read More about Pathways of cellular internalisation of liposomes delivered siRNA and effects on siRNA engagement with target mRNA and silencing in cancer cells.

Dry-powder formulations of non-covalent protein complexes with linear or miktoarm copolymers for pulmonary delivery (2018)
Journal Article
Nieto-Orellana, A., Coghlan, D., Rothery, M., Falcone, F. H., Bosquillon, C., Childerhouse, N., …Stolnik, S. (2018). Dry-powder formulations of non-covalent protein complexes with linear or miktoarm copolymers for pulmonary delivery. International Journal of Pharmaceutics, 540(1-2), https://doi.org/10.1016/j.ijpharm.2018.02.008

Pulmonary delivery of protein therapeutics has considerable clinical potential for treating both local and systemic diseases. However, poor protein conformational stability, immunogenicity and protein degradation by proteolytic enzymes in the lung ar... Read More about Dry-powder formulations of non-covalent protein complexes with linear or miktoarm copolymers for pulmonary delivery.

Synthetic glycopolymers as modulators of protein aggregation: influence of chemical composition, topology and concentration (2018)
Journal Article
Madeira do Ó, J., Mastrotto, F., Francini, N., Allen, S., van der Walle, C., Stolnik, S., & Mantovani, G. (in press). Synthetic glycopolymers as modulators of protein aggregation: influence of chemical composition, topology and concentration. Journal of Materials Chemistry B, 7(6), https://doi.org/10.1039/c7tb02720f

Novel drug excipients are required to achieve stable formulations of protein drug candidates. Synthetic glycopolymers have been shown in some cases to improve protein formulation stability, although their structure function relationship remains unkno... Read More about Synthetic glycopolymers as modulators of protein aggregation: influence of chemical composition, topology and concentration.

An electrochemical system for the study of trans-plasma membrane electron transport in whole eukaryotic cells (2018)
Journal Article
Sherman, H. G., Jovanovic, C., Stolnik, S., & Rawson, F. J. (in press). An electrochemical system for the study of trans-plasma membrane electron transport in whole eukaryotic cells. Analytical Chemistry, 90(4), https://doi.org/10.1021/acs.analchem.7b04853

The development of new assays to study trans-plasma membrane electron transport (tPMET) in eukaryotic systems is paramount for a number reasons, which include the further understanding of the underlying biology which can then potentially be applied t... Read More about An electrochemical system for the study of trans-plasma membrane electron transport in whole eukaryotic cells.

Effect of polymer topology on non-covalent polymer-protein complexation: miktoarm versus linear mPEG-poly(glutamic acid) copolymers (2017)
Journal Article
Nieto-Orellana, A., Di Antonio, M., Conte, C., Falcone, F. H., Bosquillon, C., Childerhouse, N., …Stolnik, S. (in press). Effect of polymer topology on non-covalent polymer-protein complexation: miktoarm versus linear mPEG-poly(glutamic acid) copolymers. Polymer Chemistry, 8(14), https://doi.org/10.1039/C7PY00169J

Non-covalent polymer-protein conjugation is emerging as a potential route to improve pharmacokinetics and pharmacodynamics of protein therapeutics. In this study, a family of structurally related block copolymers of mPEG2k - poly(glutamic acid) with... Read More about Effect of polymer topology on non-covalent polymer-protein complexation: miktoarm versus linear mPEG-poly(glutamic acid) copolymers.

Insight into the relationship between the cell culture model, cell trafficking and siRNA silencing efficiency (2016)
Journal Article
Capel, V., Vllasaliu, D., Watts, P., & Stolnik, S. (2016). Insight into the relationship between the cell culture model, cell trafficking and siRNA silencing efficiency. Biochemical and Biophysical Research Communications, 477(2), 260-265. https://doi.org/10.1016/j.bbrc.2016.06.054

Despite research efforts, cell uptake processes determining siRNA silencing efficiency remain unclear. Here, we examine the relationship between in vitro cell culture models, cellular trafficking and siRNA silencing efficiency to provide a mechanisti... Read More about Insight into the relationship between the cell culture model, cell trafficking and siRNA silencing efficiency.

Live imaging of cellular internalization of single colloidal particle by combined label-free and fluorescence total internal reflection microscopy (2015)
Journal Article
Byrne, G. D., Vllasaliu, D., Falcone, F. H., Somekh, M. G., & Stolnik, S. (2015). Live imaging of cellular internalization of single colloidal particle by combined label-free and fluorescence total internal reflection microscopy. Molecular Pharmaceutics, 12(11), 3862-3870. doi:10.1021/acs.molpharmaceut.5b00215

In this work we utilize the combination of label-free total internal reflection microscopy and total internal reflectance fluorescence (TIRM/TIRF) microscopy to achieve a simultaneous, live imaging of single, label-free colloidal particle endocytosis... Read More about Live imaging of cellular internalization of single colloidal particle by combined label-free and fluorescence total internal reflection microscopy.

Structural basis of Lewis(b) antigen binding by the Helicobacter pylori adhesin BabA (2015)
Journal Article
Hage, N., Howard, T., Phillips, C., Brassington, C., Overman, R., Debreczeni, J., …Falcone, F. H. (2015). Structural basis of Lewis(b) antigen binding by the Helicobacter pylori adhesin BabA. Science Advances, 1(7), Article e1500315. https://doi.org/10.1126/sciadv.1500315

Helicobacter pylori is a leading cause of peptic ulceration and gastric cancer worldwide. To achieve colonization of the stomach, this Gram-negative bacterium adheres to Lewis(b) (Le(b)) antigens in the gastric mucosa using its outer membrane protein... Read More about Structural basis of Lewis(b) antigen binding by the Helicobacter pylori adhesin BabA.

Nose-to-brain delivery: investigation of the rransport of nanoparticles with different surface characteristics and sizes in excised porcine olfactory epithelium (2015)
Journal Article
Mistry, A., Stolnik, S., & Illum, L. (2015). Nose-to-brain delivery: investigation of the rransport of nanoparticles with different surface characteristics and sizes in excised porcine olfactory epithelium. Pharmaceutical Research, 12(8), 2755-2766. doi:10.1021/acs.molpharmaceut.5b00088

The ability to deliver therapeutically relevant amounts of drugs directly from the nasal cavity to the central nervous system to treat neurological diseases is dependent on the availability of efficient drug delivery systems. Increased delivery and/o... Read More about Nose-to-brain delivery: investigation of the rransport of nanoparticles with different surface characteristics and sizes in excised porcine olfactory epithelium.

Improved expression and purification of the Helicobacter pylori adhesin BabA through the incorporation of a hexa-lysine tag (2014)
Journal Article
Hage, N., Falcone, F., Renshaw, J. G., Sebastiaan Winkler, G., Gellert, P., & Stolnik, S. (2015). Improved expression and purification of the Helicobacter pylori adhesin BabA through the incorporation of a hexa-lysine tag. Protein Expression and Purification, 106, 25-30. doi:10.1016/j.pep.2014.10.009

Helicobacter pylori is a pathogenic bacterium that has the remarkable ability to withstand the harsh conditions of the stomach for decades. This is achieved through unique evolutionary adaptations, which include binding Lewisb antigens found on the g... Read More about Improved expression and purification of the Helicobacter pylori adhesin BabA through the incorporation of a hexa-lysine tag.

The mechanisms of nanoparticle internalization and transport across an intestinal epithelial cell model: effect of size and surface charge (2014)
Journal Article
Bannunah, A. M., Vllasaliu, D., Lord, J., & Stolnik, . S. (2014). The mechanisms of nanoparticle internalization and transport across an intestinal epithelial cell model: effect of size and surface charge. Molecular Pharmaceutics, 11(12), 4363-4373. doi:10.1021/mp500439c

This study investigated the effect of nanoparticle size (50 and 100 nm) and surface charge on their interaction with Caco-2 monolayers as a model of the intestinal epithelium, including cell internalization pathways and the level of transepithelial t... Read More about The mechanisms of nanoparticle internalization and transport across an intestinal epithelial cell model: effect of size and surface charge.

Mechanism of mucosal permeability enhancement of CriticalSorb® (Solutol® HS15) investigated in vitro in cell cultures (2014)
Journal Article
Shubber, S., Vllasaliu, D., Rauch, C., Jordan, F., Illum, L., & Stolnik-Trenkic, S. (2015). Mechanism of mucosal permeability enhancement of CriticalSorb® (Solutol® HS15) investigated in vitro in cell cultures. Pharmaceutical Research, 32(2), 516-527. https://doi.org/10.1007/s11095-014-1481-5

Purpose: CriticalSorb™, with the principal component Solutol® HS15, is a novel mucosal drug delivery system demonstrated to improve the bioavailability of selected biotherapeutics. The intention of this study is to elucidate mechanism(s) responsible... Read More about Mechanism of mucosal permeability enhancement of CriticalSorb® (Solutol® HS15) investigated in vitro in cell cultures.