Lehnart, Stephan

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07.06.2024

Establishing synthetic ribbon-type active zones in a heterologous expression system

Authors Kapoor R, Schwenzer N, Dresbach T, Lehnart S, Moser T Journal eLife Citation eLife 13:RP98254. Abstract Encoding of several sensory modalities into neural signals is mediated by ribbon synapses. The synaptic ribbon tethers synaptic vesicles at the presynaptic active zone (AZ) and might act as a super-scaffold organizing AZ
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01.06.2024

Analyzing cross-talk between superimposed signals: Vector norm dependent hidden Markov models and applications to ion channels

Authors Vanegas LJ, Eltzner B, Rudolf D, Dura M, Lehnart SE, Munk A Journal The Annals of Applied Statistics Citation Ann. Appl. Stat. 18(2): 1445-1470. Abstract We propose and investigate a hidden Markov model (HMM) for the analysis of dependent, aggregated, superimposed two-state signal recordings. A major motivation for this
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23.05.2024

CaV1.3 channel clusters characterized by live-cell and isolated plasma membrane nanoscopy

Authors Schwenzer N, Teiwes NK, Kohl T, Pohl C, Giller MJ, Lehnart SE, Steinem C Journal Communications Biology Citation Commun Biol. 2024 May 23;7(1):620. Abstract A key player of excitable cells in the heart and brain is the L-type calcium channel CaV1.3. In the heart, it is required for voltage-dependent
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10.03.2024

3D Super-Resolution Nuclear Q-FISH Imaging Reveals Cell-Cycle-Related Telomere Changes

Authors Pochechueva TV, Schwenzer N, Kohl T, Brandenburg S, Kaltenecker G, Wollnik B, Lehnart SE Journal International Journal of Molecular Sciences Citation Int J Mol Sci. 2024 Mar 10;25(6):3183. Abstract We present novel workflows for Q-FISH nanoscopy with the potential for prognostic applications and resolving novel chromatin compaction changes. DNA-fluorescence
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09.02.2024

SERCA2a microdomain cAMP changes in heart failure with preserved ejection fraction

Authors Gotthardt M, Lehnart SE   Journal Cardiovascular Research   Citation Cardiovasc Res. 2024 Feb 9:cvae030.   Abstract No abstract available.   DOI 10.1093/cvr/cvae030   Pubmed Link
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05.01.2024

Noninvasive analysis of contractility during identical maturations revealed two phenotypes in ventricular but not in atrial iPSC-CM

Authors Rapöhn M, Cyganek L, Voigt N, Hasenfuß G, Lehnart SE, Wegener JW Journal American Journal of Physiology. Heart and Circulatory Physiology Citation Am J Physiol Heart Circ Physiol. 2024 Jan 5. Abstract Patient-derived induced pluripotent stem cells (iPSC) can be differentiated into atrial and ventricular cardiomyocytes to allow for
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27.11.2023

A dual-targeted drug inhibits cardiac ryanodine receptor Ca2+ leak but activates SERCA2a Ca2+ uptake

Authors Wegener JW, Mitronova GY, ElShareif L, Quentin C, Belov V, Pochechueva T, Hasenfuss G, Ackermann L, Lehnart SE Journal Life Science Alliance Citation Life Sci Alliance. 2023 Nov 27;7(2):e202302278. Abstract In the heart, genetic or acquired mishandling of diastolic [Ca2+] by ryanodine receptor type 2 (RyR2) overactivity correlates with
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06.10.2023

Cardiac multiscale bioimaging: from nano- through micro- to mesoscales

Authors Tolstik E, Lehnart SE, Soeller C, Lorenz K, Sacconi L Journal Trends in Biotechnology Citation Trends Biotechnol. 2023 Oct 6:S0167-7799(23)00241-X. Abstract Cardiac multiscale bioimaging is an emerging field that aims to provide a comprehensive understanding of the heart and its functions at various levels, from the molecular to the
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30.06.2023

Cryo-electron tomography of large biological specimens vitrified by plunge freezing

Authors Baeuerlein FJB, Renner M, El Chami D, Lehnart SE, Pastor-Pareja JC, Fernandez-Busnadiego R Journal BioRxiv Citation bioRxiv 2021.04.14.437159. Abstract Cryo-focused ion beam (cryo-FIB) milling allows thinning vitrified cells for high resolution imaging by cryo-electron tomography (cryo-ET). However, it remains challenging to apply this workflow to voluminous biological specimens such
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14.06.2023

An Alternative Mechanism of Subcellular Iron Uptake Deficiency in Cardiomyocytes

Authors Dai Y, Ignatyeva N, Xu H, Wali R, Toischer K, Brandenburg S, Lenz C, Pronto J, Fakuade FE, Sossalla S, Zeisberg EM, Janshoff A, Kutschka I, Voigt N, Urlaub H, Rasmussen TB, Mogensen J, Lehnart SE, Hasenfuss G, Ebert A Journal Circulation Research Citation Circ Res. 2023 Jun 14.
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