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Optically Controlled Drug Delivery Through Microscale Brain-Machine Interfaces Using Integrated Upconverting Nanoparticles.
Sensors (Basel)
December 2024
Research Group for Implantable Microsystems, Faculty of Information Technology & Bionics, Pázmány Péter Catholic University, H-1083 Budapest, Hungary.
The aim of this work is to incorporate lanthanide-cored upconversion nanoparticles (UCNP) into the surface of microengineered biomedical implants to create a spatially controlled and optically releasable model drug delivery device in an integrated fashion. Our approach enables silicone-based microelectrocorticography (ECoG) implants holding platinum/iridium recording sites to serve as a stable host of UCNPs. Nanoparticles excitable in the near-infrared (lower energy) regime and emitting visible (higher energy) light are utilized in a study.
View Article and Find Full Text PDFAutism-Linked Mutations in αδ-1 and αδ-3 Reduce Protein Membrane Expression but Affect Neither Calcium Channels nor Trans-Synaptic Signaling.
Pharmaceuticals (Basel)
November 2024
Division of Physiology, Department of Pharmacology, Physiology, and Microbiology, Karl Landsteiner University of Health Sciences, 3500 Krems, Austria.
Background: αδ proteins regulate membrane trafficking and biophysical properties of voltage-gated calcium channels. Moreover, they modulate axonal wiring, synapse formation, and trans-synaptic signaling. Several rare missense variants in CACNA2D1 (coding for αδ-1) and CACNA2D3 (coding for αδ-3) genes were identified in patients with autism spectrum disorder (ASD).
View Article and Find Full Text PDFModeling Fibroblast-Cardiomyocyte Interactions: Unveiling the Role of Ion Currents in Action Potential Modulation.
Int J Mol Sci
December 2024
Bioinspired Engineering and Biomechanics Center, Xi'an Jiaotong University, Xi'an 710049, China.
Fibrotic cardiomyopathy represents a significant pathological condition characterized by the interaction between cardiomyocytes and fibroblasts in the heart, and it currently lacks an effective cure. In vitro platforms, such as engineered heart tissue (EHT) developed through the co-culturing of cardiomyocytes and fibroblasts, are under investigation to elucidate and manipulate these cellular interactions. We present the first integration of mathematical electrophysiological models that encapsulate fibroblast-cardiomyocyte interactions with experimental EHT studies to identify and modulate the ion channels governing these dynamics.
View Article and Find Full Text PDFA Comparative Study of the Electroneurographic Findings in Amyloidotic Polyneuropathy in Patients with Light-Chain Amyloidosis and Glu54Gln Transthyretin Amyloidosis.
Medicina (Kaunas)
December 2024
Fundeni Clinical Institute, 022328 Bucharest, Romania.
: Amyloidosis is a disorder characterized by the abnormal folding of proteins, forming insoluble fibrils that accumulate in tissues and organs. This accumulation disrupts normal tissue architecture and organ function, often with serious consequences, including death if left untreated. Light-chain amyloidosis (AL) and hereditary transthyretin-type amyloidosis (hATTR) are two of the most common types.
View Article and Find Full Text PDFSubclinical Detection of Hydroxychloroquine-Induced Retinopathy in Patients with Systemic Lupus Erythematous Using Multifocal Electroretinography and Optical Coherence Tomography.
J Clin Med
December 2024
Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea.
Although hydroxychloroquine (HCQ) is used to treat systemic lupus erythematosus (SLE), it is associated with retinal toxicity. Early diagnosis can prevent the further progression of HCQ-associated retinopathy by discontinuing HCQ treatments. This study aimed to evaluate the early diagnostic parameters in patients with SLE treated with HCQ and identify the best approach using multifocal electroretinography (mfERG) and swept-source optical coherence tomography (SS-OCT) to reflect subclinical retinal toxicity.
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