Estimation of crossbridge-state during cardiomyocyte beating using second harmonic generation.
Journal
Life science alliance
ISSN: 2575-1077
Titre abrégé: Life Sci Alliance
Pays: United States
ID NLM: 101728869
Informations de publication
Date de publication:
07 2023
07 2023
Historique:
received:
02
04
2023
revised:
21
04
2023
accepted:
21
04
2023
medline:
29
5
2023
pubmed:
27
5
2023
entrez:
26
5
2023
Statut:
epublish
Résumé
Estimation of dynamic change of crossbridge formation in living cardiomyocytes is expected to provide crucial information for elucidating cardiomyopathy mechanisms, efficacy of an intervention, and others. Here, we established an assay system to dynamically measure second harmonic generation (SHG) anisotropy derived from myosin filaments depended on their crossbridge status in pulsating cardiomyocytes. Experiments utilizing an inheritable mutation that induces excessive myosin-actin interactions revealed that the correlation between sarcomere length and SHG anisotropy represents crossbridge formation ratio during pulsation. Furthermore, the present method found that ultraviolet irradiation induced an increased population of attached crossbridges that lost the force-generating ability upon myocardial differentiation. Taking an advantage of infrared two-photon excitation in SHG microscopy, myocardial dysfunction could be intravitally evaluated in a
Identifiants
pubmed: 37236659
pii: 6/7/e202302070
doi: 10.26508/lsa.202302070
pmc: PMC10215972
pii:
doi:
Substances chimiques
Myosins
EC 3.6.4.1
Actomyosin
9013-26-7
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2023 Fujita et al.
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