Ion Channel Dysfunctions in Dilated Cardiomyopathy in Limb-Girdle Muscular Dystrophy
- PMID: 29545480
- DOI: 10.1161/CIRCGEN.117.001893
Ion Channel Dysfunctions in Dilated Cardiomyopathy in Limb-Girdle Muscular Dystrophy
Abstract
Background: Limb-Girdle muscular dystrophies (LGMD) are a heritable group of genetically determined disorders with a primary involvement of the pelvic or shoulder girdle musculature with partially cardiac manifestation, such as dilated cardiomyopathy (DCM) and life-threatening tachyarrhythmia. We report here that human induced pluripotent stem cell (hiPSC)-derived cardiomyocytes from a patient with LGMD2I and DCM associated with recurrent ventricular tachycardia displayed ion channel dysfunction and abnormality of calcium homeostasis.
Methods: Dermal fibroblasts obtained from a patient with LGMD2I harboring a fukutin-related protein gene mutation (826C>A; Leu276Ile) and 3 healthy donors were reprogrammed to hiPSCs. The hiPSCs were differentiated into cardiomyocytes and used for biological and electrophysiological studies.
Results: Compared with hiPSC cardiomyocytes from the healthy donors, the hiPSC cardiomyocytes from the patient exhibited abnormal action potentials characterized by reduced amplitude and upstroke velocity. The peak and late Na channel currents (INa) as well as the peak L-type calcium channel currents were significantly reduced. The expression of SCN5A and CACNA1C was reduced in DCM cardiomyocytes, consistent with reduction of INa and L-type calcium channel currents. In addition, the rapidly activating delayed rectifier potassium current (IKr) was reduced, whereas the transient outward current (Ito) and slowly activating delayed rectifier potassium current (IKs) were similar in DCM and control cardiomyocytes. Finally, a significant reduction of systolic and diastolic intracellular Ca2+ concentrations was detected in DCM cardiomyocytes.
Conclusions: This study demonstrates that patient-specific hiPSC cardiomyocytes can recapitulate some phenotypic properties of LGMD2I with DCM and provide a platform for studies on the cardiac events in LGMD.
Keywords: action potentials; calcium channels, L-type; cardiomyopathy, dilated; induced pluripotent stem cells; muscular dystrophies, Limb-Girdle.
© 2018 American Heart Association, Inc.
Comment in
-
Modeling Cardiomyopathy and Arrhythmias in Induced Pluripotent Stem Cell-Derived Cardiomyocytes.Circ Genom Precis Med. 2018 Mar;11(3):e002088. doi: 10.1161/CIRCGEN.118.002088. Circ Genom Precis Med. 2018. PMID: 29545481 Free PMC article. No abstract available.
Similar articles
-
Human-induced pluripotent stem cell-derived cardiomyocytes from cardiac progenitor cells: effects of selective ion channel blockade.Europace. 2016 Dec;18(suppl 4):iv67-iv76. doi: 10.1093/europace/euw352. Europace. 2016. PMID: 28011833
-
Electrophysiological mechanisms of vandetanib-induced cardiotoxicity: Comparison of action potentials in rabbit Purkinje fibers and pluripotent stem cell-derived cardiomyocytes.PLoS One. 2018 Apr 9;13(4):e0195577. doi: 10.1371/journal.pone.0195577. eCollection 2018. PLoS One. 2018. PMID: 29630634 Free PMC article.
-
Impacts of DCM-linked gating pore currents on the electrophysiological characteristics of hiPSC-CM monolayers.Biochem Biophys Res Commun. 2024 Sep 3;723:150175. doi: 10.1016/j.bbrc.2024.150175. Epub 2024 May 25. Biochem Biophys Res Commun. 2024. PMID: 38820625
-
Cardiomyopathy phenotypes in human-induced pluripotent stem cell-derived cardiomyocytes-a systematic review.Pflugers Arch. 2019 May;471(5):755-768. doi: 10.1007/s00424-018-2214-0. Epub 2018 Oct 15. Pflugers Arch. 2019. PMID: 30324321 Free PMC article.
-
Arrhythmic Phenotypes Are a Defining Feature of Dilated Cardiomyopathy-Associated SCN5A Variants: A Systematic Review.Circ Genom Precis Med. 2022 Feb;15(1):e003432. doi: 10.1161/CIRCGEN.121.003432. Epub 2021 Dec 24. Circ Genom Precis Med. 2022. PMID: 34949099
Cited by
-
TRPV1 activation and internalization is part of the LPS-induced inflammation in human iPSC-derived cardiomyocytes.Sci Rep. 2021 Jul 19;11(1):14689. doi: 10.1038/s41598-021-93958-3. Sci Rep. 2021. PMID: 34282193 Free PMC article.
-
Electrocardiographic Parameters Associated with Adverse Outcomes in Children with Cardiomyopathies.J Clin Med. 2022 Nov 24;11(23):6930. doi: 10.3390/jcm11236930. J Clin Med. 2022. PMID: 36498505 Free PMC article.
-
Modeling Cardiomyopathy and Arrhythmias in Induced Pluripotent Stem Cell-Derived Cardiomyocytes.Circ Genom Precis Med. 2018 Mar;11(3):e002088. doi: 10.1161/CIRCGEN.118.002088. Circ Genom Precis Med. 2018. PMID: 29545481 Free PMC article. No abstract available.
-
miR-454-3p and miR-194-5p targeting cardiac sarcolemma ion exchange transcripts are potential noninvasive diagnostic biomarkers for childhood dilated cardiomyopathy in Egyptian patients.Egypt Heart J. 2022 Sep 8;74(1):65. doi: 10.1186/s43044-022-00300-x. Egypt Heart J. 2022. PMID: 36076093 Free PMC article.
-
iPSCs as a Platform for Disease Modeling, Drug Screening, and Personalized Therapy in Muscular Dystrophies.Cells. 2019 Jan 3;8(1):20. doi: 10.3390/cells8010020. Cells. 2019. PMID: 30609814 Free PMC article. Review.
Publication types
MeSH terms
Substances
Supplementary concepts
LinkOut - more resources
Full Text Sources
Other Literature Sources
Miscellaneous