{"title":"Dynamics of viral self-assembly, viral genome packaging, and virus-cell interactions studied by optical tweezers.","authors":"Yanping Gong, Dorus T Harmsen, Wouter H Roos","doi":"10.1007/s00249-026-01843-6","DOIUrl":"https://doi.org/10.1007/s00249-026-01843-6","url":null,"abstract":"<p><p>Viruses are complex supramolecular assemblies that propagate their genetic material from cell to cell, thereby relying on host cell mechanisms. Employing a combination of passive and active strategies, they efficiently package, transport and release nucleic acids. While structural and biochemical techniques offer insights into certain, static aspects of the viral life cycle, recent advancements in biophysical approaches now allow for direct measurement of their inherent dynamic activities in the research field commonly referred to as physical virology. One of these methods is optical tweezers, enabling the precise measurement of force and position at the single-molecule level over time. Over the past decades, the ability to optically trap beads and to manipulate biomolecules has revolutionised medical and biophysical research. In this paper, we provide a comprehensive analysis of optical tweezers, exploring its integration with imaging modalities and review its diverse applications in the study of viruses and viral components. In particular we focus on studies that use optical tweezers to study virus-cell interactions, genome packaging using molecular motors and co-assembly of viral assembly proteins with their nucleic acid.</p>","PeriodicalId":548,"journal":{"name":"European Biophysics Journal","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147759236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Silvia García-Vilana, David Sánchez-Molina, Hamed Abdi, Vafa Rahimi-Movaghar
{"title":"Statistical mechanics of soft collagenous tissues: a constitutive model with damage for cerebral bridging veins.","authors":"Silvia García-Vilana, David Sánchez-Molina, Hamed Abdi, Vafa Rahimi-Movaghar","doi":"10.1007/s00249-026-01839-2","DOIUrl":"https://doi.org/10.1007/s00249-026-01839-2","url":null,"abstract":"","PeriodicalId":548,"journal":{"name":"European Biophysics Journal","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147697442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Indenting multicellular spheroids with various tip geometries","authors":"Kajangi Gnanachandran, Ewelina Lorenc, Alessandro Podestà, Małgorzata Lekka","doi":"10.1007/s00249-026-01838-3","DOIUrl":"10.1007/s00249-026-01838-3","url":null,"abstract":"<div>\u0000 \u0000 <p>Spheroids are of great interest in the study of cancer as they can partially mimic the tumour microenvironment, thus allowing to investigate several aspects of cell – microenvironment interactions in healthy and diseased conditions, including those pertaining to mechanobiology. Atomic Force Microscopy (AFM) is a versatile tool for studying biological samples and their mechanobiological properties. In AFM, the tip shape and dimensions determine the contact geometry between the tip and the sample and the length scales at which the mechanical properties are probed. Given the complex multiscale structure of spheroids, the choice of tip geometry and size would allow, in principle, to dissect the mechanical response of the overall system into the contributions of the constituents, from the single cell level to the cellular aggregate. In this work, we studied the mechanical properties of spheroids derived from four cell lines (A549, NHLF, HT-29, and CCD-18Co cells). Our studies revealed that using different contact geometries in the fitting procedure results in significantly different Young’s modulus values, highlighting the multiscale response of these complex cellular systems and the importance of a precise experimental design and choice of the AFM probe for the nanomechanical measurements. We observed that the location of F-actin filaments is correlated with the rigidity of the spheroids.</p>\u0000 </div>","PeriodicalId":548,"journal":{"name":"European Biophysics Journal","volume":"55 :","pages":"319 - 330"},"PeriodicalIF":2.4,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00249-026-01838-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147621653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aroldo Cupello, Virginia Bazzurro, Alberto Diaspro, Elena Gatta, Kliment Gatzinsky, Eva Jennische, Stefan Lange, Mauro Robello, Elena Angeli
{"title":"Antisecretory Factor in rat cerebellar granule cells augments inhibitory current via GABA<sub>A</sub> receptors: a mechanism for vertigo reduction in Menière's disease?","authors":"Aroldo Cupello, Virginia Bazzurro, Alberto Diaspro, Elena Gatta, Kliment Gatzinsky, Eva Jennische, Stefan Lange, Mauro Robello, Elena Angeli","doi":"10.1007/s00249-026-01837-4","DOIUrl":"https://doi.org/10.1007/s00249-026-01837-4","url":null,"abstract":"","PeriodicalId":548,"journal":{"name":"European Biophysics Journal","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147508518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Søren Vrønning Hoffmann, Maria G Bruque, Nykola C Jones, Alison Rodger, Jean Aucamp, Tim R Dafforn, Owen R T Thomas
{"title":"Analysing the structure of antibodies using circular dichroism with an antibody augmented reference set and the algorithm SELCON.","authors":"Søren Vrønning Hoffmann, Maria G Bruque, Nykola C Jones, Alison Rodger, Jean Aucamp, Tim R Dafforn, Owen R T Thomas","doi":"10.1007/s00249-026-01828-5","DOIUrl":"https://doi.org/10.1007/s00249-026-01828-5","url":null,"abstract":"","PeriodicalId":548,"journal":{"name":"European Biophysics Journal","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147508550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Martin Schneiter, Julian Wyss, Jeremy Schori, Patrik Arnold, Martin Frenz, Pietro Cicuta, Stefan A Tschanz, André Stefanov, Loretta Müller
{"title":"Quantitative analysis of mucociliary activity by computational high-speed video reflection microscopy.","authors":"Martin Schneiter, Julian Wyss, Jeremy Schori, Patrik Arnold, Martin Frenz, Pietro Cicuta, Stefan A Tschanz, André Stefanov, Loretta Müller","doi":"10.1007/s00249-026-01835-6","DOIUrl":"https://doi.org/10.1007/s00249-026-01835-6","url":null,"abstract":"","PeriodicalId":548,"journal":{"name":"European Biophysics Journal","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147466356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}