Universität zu Köln

DiFrancesco, Mattia L., Mesirca, Pietro ORCID: 0000-0002-9538-3096, Bidaud, Isabelle, Isbrandt, Dirk ORCID: 0000-0002-4720-1016 and Mangoni, Matteo E. (2021). The funny current in genetically modified mice. Prog. Biophys. Mol. Biol., 166. S. 39 - 51. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-1732

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Abstract

Since its first description in 1979, the hyperpolarization-activated funny current (I-f) has been the object of intensive research aimed at understanding its role in cardiac pacemaker activity and its modulation by the sympathetic and parasympathetic branches of the autonomic nervous system. I-f was described in isolated tissue strips of the rabbit sinoatrial node using the double-electrode voltage-clamp technique. Since then, the rabbit has been the principal animal model for studying pacemaker activity and I-f for more than 20 years. In 2001, the first study describing the electrophysiological properties of mouse sinoatrial pacemaker myocytes and those of I-f was published. It was soon followed by the description of murine myocytes of the atrioventricular node and the Purkinje fibres. The sinoatrial node of genetically modified mice has become a very popular model for studying the mechanisms of cardiac pacemaker activity. This field of research benefits from the impressive advancement of in-vivo exploration tech-niques of physiological parameters, imaging, genetics, and large-scale genomic approaches. The present review discusses the influence of mouse genetic on the most recent knowledge of the funny current's role in the physiology and pathophysiology of cardiac pacemaker activity. Genetically modified mice have provided important insights into the role of I-f in determining intrinsic automaticity in vivo and in myocytes of the conduction system. In addition, gene targeting of f-(HCN) channel isoforms have contributed to elucidating the current's role in the regulation of heart rate by the parasympathetic nervous system. This review is dedicated to Dario DiFrancesco on his retirement. (C) 2021 Published by Elsevier Ltd.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code DiFrancesco, Mattia L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mesirca, Pietro UNSPECIFIED orcid.org/0000-0002-9538-3096 UNSPECIFIED Bidaud, Isabelle UNSPECIFIED UNSPECIFIED UNSPECIFIED Isbrandt, Dirk UNSPECIFIED orcid.org/0000-0002-4720-1016 UNSPECIFIED Mangoni, Matteo E. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-591845
DOI:	10.1016/j.pbiomolbio.2021.06.003
Journal or Publication Title:	Prog. Biophys. Mol. Biol.
Volume:	166
Page Range:	S. 39 - 51
Date:	2021
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-1732
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HYPERPOLARIZATION-ACTIVATED CHANNEL; SINOATRIAL NODE ACTIVITY; SICK SINUS SYNDROME; HEART-RATE; PACEMAKER CHANNELS; RYANODINE RECEPTOR; CA2+ RELEASE; NA+-CA2+ EXCHANGER; CAMP SENSITIVITY; CATION CHANNEL Multiple languages Biochemistry & Molecular Biology; Biophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59184