Journal Article (Review Article)

DZNE-2022-00809

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The funny current in genetically modified mice.

DiFrancesco, M. L. ; Mesirca, P. ; Bidaud, I. ; Isbrandt, D.DZNE* ; Mangoni, M. E.

2021
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.pbiomolbio.2021.06.003

Abstract: Since its first description in 1979, the hyperpolarization-activated funny current (If) 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. If 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 If for more than 20 years. In 2001, the first study describing the electrophysiological properties of mouse sinoatrial pacemaker myocytes and those of If 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 techniques 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 If 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.

Keyword(s): Animals (MeSH) ; Electrophysiological Phenomena (MeSH) ; Heart Rate (MeSH) ; Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels (MeSH) ; Mice (MeSH) ; Patch-Clamp Techniques (MeSH) ; Rabbits (MeSH) ; Sinoatrial Node (MeSH) ; Cardiac pacemaker activity ; Conduction system ; Funny current ; Genetically modified mice ; Rhythmogenesis ; Sinoatrial node ; Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels

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Contributing Institute(s):

1. Experimental Neurophysiology (AG Isbrandt)

Research Program(s):

1. 351 - Brain Function (POF4-351) (POF4-351)

Appears in the scientific report 2021

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Database coverage:
; BIOSIS Previews ; BIOSIS Reviews Reports And Meetings ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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