Individual vesicular exocytosis of adrenaline by dense core vesicles in chromaffin cells is considered here as a paradigm of many situations encountered in biology, nanosciences and drug delivery in which a spherical container releases in the external environment through gradual uncovering of its surface. A procedure for extracting the aperture (opening) function of a biological vesicle fusing with a cell membrane from the released molecular flux of neurotransmitter as monitored by amperometry has been devised based on semi-analytical expressions derived in a former work [C. Amatore, A. I. Oleinick, I. Svir, ChemPhysChem 2009, 10, DOI: 10.1002/cphc.200900646]. This precise analysis shows that in the absence of direct information about the radius of the vesicle or about the concentration of the adrenaline cation stored by the vesicle matrix, current spikes do not contain enough information to determine the maximum aperture angle. Yet, a statistical analysis establishes that this maximum aperture angle is most probably less than a few tens of degrees, which suggests that full fusion is a very improbable event.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/cphc.200900647 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Differences in radiographic and clinical outcomes of different oblique lumbar interbody fusions for lumbar degenerative diseases: a systematic review and Bayesian network meta-analysis.
Neurosurg Rev
January 2025
Nanjing TCM Hospital Affiliated to Nanjing University of Traditional Chinese Medicine, 157 Daming Road, Nanjing, Qinhuai District, 210022, China.
To systematically evaluate the differences in the clinical efficacy of lumbar degenerative disorders (LDDs) treatment between oblique lumbar interbody fusion with percutaneous pedicle screw fixation (OLIF-PF), OLIF stand-alone (OLIF-SA), and OLIF with anterolateral screw fixation (OLIF-AF). A systematic search was conducted on both English and Chinese databases, wherein the literature was screened based on title, abstract, and full text. Literature that met the inclusion criteria was assessed for quality and relevant information was extracted.
View Article and Find Full Text PDFResolving the molecular basis of a Mendelian condition remains challenging owing to the diverse mechanisms by which genetic variants cause disease. To address this, we developed a synchronized long-read genome, methylome, epigenome and transcriptome sequencing approach, which enables accurate single-nucleotide, insertion-deletion and structural variant calling and diploid de novo genome assembly. This permits the simultaneous elucidation of haplotype-resolved CpG methylation, chromatin accessibility and full-length transcript information in a single long-read sequencing run.
View Article and Find Full Text PDFUltrasound-Enhanced Spleen-Targeted mRNA Delivery via Fluorinated PEGylated Lipid Nanoparticles for Immunotherapy.
Angew Chem Int Ed Engl
January 2025
University of Science and Technology of China School of Biomedical Engineering, Department of Polymer Science and Engineering, 96 Jinzhai Road, 230026, Hefei, CHINA.
Lipid nanoparticles (LNPs) based messenger RNA (mRNA) therapeutics hold immense promise for treating a wide array of diseases, while their nonhepatic organs targeting and insufficient endosomal escape efficiency remain challenges. For LNPs, polyethylene glycol (PEG) lipids have a crucial role in stabilizing them in aqueous medium, but they severely hinder cellular uptake and reduce transfection efficiency. In this study, we designed ultrasound (US)-assisted fluorinated PEGylated LNPs (F-LNPs) to enhance spleen-targeted mRNA delivery and transfection.
View Article and Find Full Text PDFDevelopment of a SYBR Green-based RT-qPCR assay for the rapid detection of peste-des-petits-ruminants virus.
J Vet Diagn Invest
January 2025
Departments of Veterinary Microbiology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Pookode, Kerala, India.
Peste-des-petits-ruminants (PPR) is primarily a disease of small ruminants caused by peste-des-petits-ruminants virus (PPRV; , ), formerly the small ruminant morbillivirus. PPRV can cause significant morbidity and mortality in small ruminants and a significant economic impact. Conventional reverse-transcription PCR (RT-PCR), and probe-based and SYBR Green-based RT quantitative real-time PCR (RT-qPCR), are employed for the molecular detection of PPRV.
View Article and Find Full Text PDFAnterior Lumbar Interbody Fusion (ALIF) Versus Full-Endoscopic/Percutaneous TLIF With a Large-Footprint Interbody Cage: A Comparative Observational Study.
Global Spine J
January 2025
Research & Development, Endospine SLU, Andorra la Vella, Andorra.
Study Design: Exploratory prospective observational case-control study.
Objectives: Aim of this study was to compare clinical and radiologic outcome, as well as peri-operative complications, of anterior lumbar interbody fusion (ALIF) and full-endoscopic/percutaneous trans-Kambin transforaminal lumbar interbody fusion (pTLIF) with a large-footprint interbody cage.
Methods: Patients that underwent elective ALIF and pTLIF with a large-footprint interbody cage were prospectively evaluated.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!