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ORP2 interacts with phosphoinositides and controls the subcellular distribution of cholesterol

Publication year: 2019
Authors: Koponen A. a, Arora A. a, Takahashi K. b, Kentala H. a, Kivelä A.M. a, Jääskeläinen E. a, Peränen J. b, Somerharju P. c, Ikonen E. b, Viitala T. d, Olkkonen V.M. a,b
Published in: Biochimie, 2019, Vol. 158, p. 90-101
ORP2 is a sterol-binding protein with documented functions in lipid and glucose metabolism, Akt signaling, steroidogenesis, cell adhesion, migration and proliferation. [...]

Continuous assembly of supramolecular polyamine–phosphate networks on surfaces: preparation and permeability properties of nanofilms

Publication year: 2019
Authors: Agazzi M.L. a, Herrera S.E. a, Cortez M.L. a, Marmisollé W.A. a, von Bilderling C. a,b, Pietrasanta L.I. b,c, Azzaroni O. *a
Published in: Soft Matter, 2019, 15, p. 1640-1650
Supramolecular self-assembly of molecular building blocks represents a powerful “nanoarchitectonic” tool to create new functional materials with molecular-level feature control. Here, we propose [...]

Carboxyl-rich plasma polymer surfaces in surface plasmon resonance immunosensing

Publication year: 2018
Authors: Makhneva E. 1, 2, 6, Obrusnik A. 1, 2, 6, Farka Z. 3, Skladal P. 3, 4, Vandenbossche M. 5, Hegemann D. 5, Zajickova L. 1, 2
Published in: Japanese Journal of Applied Physics, 2018, Vol. 57, Number 1S, 01AG06
Stable carboxyl-rich plasma polymers (PPs) were deposited onto the gold surface of surface plasmon resonance (SPR) chips under conditions that were chosen based on lumped kinetic model results. Carboxyl-rich films are [...]

Cascading reaction of arginase and urease on a graphene-based FET for ultrasensitive, real-time detection of arginine

Publication year: 2018
Authors: Berninger T. a, Bliem C. a, Piccinini E. b, Azzaroni O. b, Knoll W. a
Published in: Biosensors and Bioelectronics, 2018, Vol. 115, p. 104-110
Herein, a biosensor based on a reduced graphene oxide field effect transistor (rGO-FET) functionalized with the cascading enzymes arginase and urease was developed for the detection of L-arginine. Arginase [...]

Enzyme Multilayers on Graphene-Based FETs for Biosensing Applications

Publication year: 2018
Authors: Bliem C. a, Piccinini E. b, Knoll W. a, Azzaroni O. b
Published in: Methods in Enzymology, 2018, Vol. 609, p. 23-46
Electrochemical sensors represent a powerful tool for real-time measurement of a variety of analytes of much significance to different areas, ranging from clinical diagnostics to food technology. [...]

Affinity maturation and characterization of the ofatumumab monoclonal antibody

Publication year: 2018
Authors: Payandeh Z. 1, Rajabibazl M. 2,3, Mortazavi Y. 1,4, Rahimpour A. 3, Taromchi A.H. 1,4, Dastmalchi S. 5,6
Published in: Journal of Cellular Biochemistry, 2018
CD20 molecule, a phosphoprotein with 297 amino acids and four transmembrane domains, is a member of MS4A protein family. Anti-CD20 antibodies such as ofatumumab, which have been developed [...]

Development of a surface plasmon resonance sensor for coupling to capillary electrophoresis allowing affinity assessment of protein mixture components

Publication year: 2018
Authors: Domínguez-Vega E. a, Haselberg R. a, van Iperen D. b, Kool J. a, Somsen G.W. a, de Jong G.J. c
Published in: Sensors and Actuators B: Chemical, 2018, Vol. 254, p. 1040-1047
Surface plasmon resonance (SPR) currently is the major platform to study protein–protein interactions, but it lacks the selectivity o distinguish between binding components within one sample. [...]

Characterization of membrane–foulant interactions with novel combination of Raman spectroscopy, surface plasmon resonance and molecular dynamics simulation

Publication year: 2018
Authors: Virtanen T. a, Parkkila P. b, Koivuniemi A. b, Lahti J. a, Viitala T. b, Kallioinen M. a, Mänttäri M. a, Bunker A. b
Published in: Separation and Purification Technology, 2018, Vol. 5, p. 263-272
Adsorptive fouling, by phenolic compounds, is a serious issue regarding the development and use of membrane based filtration technologies for water [...]

High-generation amphiphilic Janus-dendrimers as stabilizing agents for drug suspensions

Publication year: 2018
Authors: Selin M. 1, Nummelin S. 2, Deleu J. 1,3, Ropponen J. 4, Viitala T. 5, Lahtinen M. 6, Koivisto J. 7, Hirvonen J. 1, Peltonen L. 1, Kostinainen M.A. 2,8, Bimbo L.M. 1,9
Published in: Biomacromolecules, 2018, Vol. 19 (10), p. 3983–3993
Pharmaceutical nanosuspensions are formed when drug crystals are suspended in aqueous media in the presence of stabilizers. This technology offers a convenient way to enhance [...]

Salt-Induced Control of the Grafting Density in Poly(ethylene glycol) Brush Layers by a Grafting-to Approach

Publication year: 2018
Authors: Ortiz R. 1, Olsen S. 2, Thormann E. 1
Published in: Langmuir, 2018, Vol. 34(15), p. 4455-4464
In this work, a method to obtain control of the grafting density during the formation of polymer brush layers by the grafting-to method of thiolated poly(ethylene glycol) onto gold is presented. The grafting density [...]

Biophysical Characterization of Supported Lipid Bilayers Using Parallel Dual-Wavelength Surface Plasmon Resonance and Quartz Crystal Microbalance Measurements

Publication year: 2018
Authors: Parkkila P. 1, Elderfi M. 2, Bunker A. 1, Viitala T. 1
Published in: Langmuir, 2018, Vol. 34 (27), p. 8081-8091
Supported lipid bilayers (SLBs) have been used extensively as an effective model of biological membranes, in the context of in vitro biophysics research, and the membranes of liposomes, [...]

A DNA–nanoparticle actuator enabling optical monitoring of nanoscale movements induced by an electric field

Publication year: 2018
Authors: Tapio K. a, Shao D. a, Auer S. b, Tuppurainen J. c, Ahlskog M. a, Hytönen V.P. b, Toppari J.J. a*
Published in: Nanoscale, 2018, Vol. 10, p. 19297-19309
Merging biological and non-biological matter to fabricate nanoscale assemblies with controllable motion and function is of great interest due to its potential application, for example, in diagnostics and biosensing. [...]

Quantitative Analysis of Thickness and pH Actuation of Weak Polyelectrolyte Brushes

Publication year: 2018
Authors: Ferrand-Drake del Castillo G., Emilsson G., Dahlin A.
Published in: The Journal of Physical Chemistry C, 2018, Issue 122 (48), p. 27516–27527
Polymer brushes are widely used as surface coatings for various inert, functional, or responsive interfaces. If the polymer can alter its protonation state (a polyelectrolyte (PE)), the brush can switch [...]

Characterization of G4 PAMAM dendrimer complexes with 5-fluorouracil and their interactions with bovine serum albumin

Publication year: 2018
Authors: Tokarczyk K., Jachimska B.
Published in: Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2018, Vol. 561, p. 357-363
The success of novel therapeutic strategies relies strongly on the development of a reliable active agent delivery mechanism. In this work, we address he question of how G4 PAMAM dendrimers [...]

Lectins at Interfaces—An Atomic Force Microscopy and Multi-Parameter-Surface Plasmon Resonance Study

Publication year: 2018
Authors: Niegelhell K. 1, Ganner T. 2, Plank H. 3, Jantscher-Krenn E. 4, Spirk S. 5
Published in: Materials 2018, Vol. 11(12), p. 2348
Lectins are a diverse class of carbohydrate binding proteins with pivotal roles in cell communication and signaling in many (patho)physiologic processes in the human body, making them promising [...]

Hydrazone crosslinked hyaluronan-based hydrogels for therapeutic delivery of adipose stem cells to treat corneal defects

Publication year: 2018
Authors: Koivusalo L. a, Karvinen J. e, Sorsa E. b, Jönkkäri I. c, Väliaho J. b, Kallio P. b, Ilmarinen T. a, Miettinen S. a, Skottman H. a, Kellomäki M. a, b
Published in: Materials Science and Engineering: C, Vol. 85, 2018, p. 68–78
Corneal blindness is a worldwide problem, plagued by insufficient amount of high-quality donor tissue. Cell therapy using human adipose stem cells (hASCs) has risen as an alternative [...]

Improved glucose label-free biosensor with layer-by-layer architecture and conducting polymer poly(3,4-ethylenedioxythiophene)

Publication year: 2018
Authors: David M. a, b, Barsan M. M. a, Brett M.A.C. a, Florescu M. b
Published in: Sensors and Actuators B, 2018, Vol. 22, Issue 3, p. 3227-3234
Layer-by-layer (LbL) self-assembly has been used for the development of a new glucose label-free biosensor. Glucose oxidase (GOx) was incorporated in a multilayer film on a gold electrode, previously modified [...]

Cyclopropylamine plasma polymer surfaces for label-free SPR and QCM immunosensing of Salmonella

Publication year: 2018
Authors: Makhneva E. a, b, Farka Z. c, Skladal P. c, d, Zajickova L. a,b
Published in: Sensors and Actuators B: Chemical, 2018
We report on the first successful application of nitrogen-containing functional surfaces prepared by plasma polymerization in surface plasmon resonance (SPR) immunosensing. The plasma polymers (PPs) [...]

Cyclodextrin-Functionalized Fiber Yarns Spun from Deep Eutectic Cellulose Solutions for Nonspecific Hormone Capture in Aqueous Matrices

Publication year: 2018
Authors: Orelma H. 1, Virtanen T. 1, Spoljaric S. 2, Lehmonen J. 1, Seppälä J. 2, Rojas O.J. 3, Harlin A. 1
Published in: Biomacromolecules, 2018, Vol. 19 (2), p. 652–661
A wood based yarn platform for capturing pharmaceutical molecules from water was developed. Cellulose fiber yarns were modified with cyclodextrins, and the capture of 17α-ethinyl estradiol (EE2), a synthetic [...]

Interaction of lecithin-cholesterol acyltransferase with lipid surfaces and apolipoprotein A-I derived peptides

Publication year: 2018
Authors: Casteleijn M. G., Parkkila P., Viitala T., Koivuniemi A.
Published in: Journal of Lipid Research, 2018
Lecithin-cholesterol acyltransferase (LCAT) is an enzyme responsible for the formation of cholesteryl esters from unesterified cholesterol (UE) and phospholipid (PL) molecules in high-density lipoprotein (HDL) particles. [...]