
IndraLab
Statements
sparser
"The reasons for this are not known, but it could be that there are additional regulatory components in the native myocytes that are regulating the interaction of SNTA1 and SCN5A. Alternatively, the stoichiometry of the transfected/infected components may be different between the two systems."
reach
"Since SCN5A is widely and definitively linked to DCM genetic architecture, and considering that a loss of interaction between SNTA1 and SCN5A could alter the sodium channel availability or biophysical properties, we can hypothesize that SNTA1 might contribute to the SCN5A-mediated phenotypes in DCM."
sparser
"Moreover, the functional studies for the complex SCN5A-SNTA1 (lacking both nNOS and PMCA4b) or SCN5A-SNTA1-nNOS complex (lacking PMCA4b) suggest that the three SNTA1 mutations do not cause increased late I Na by a direct interaction between SNTA1 and SCN5A or between SNTA1 and nNOS."
sparser
"In a study by Ueda et al. [ xref ], it has been demonstrated that SNTA1 also interacts with SCN5A, connecting it to the nNOS–PMCA complex in the heart, and a missense mutation in SNTA1 disrupts the association between PMCA4b and SCN5A, leading to an increased late sodium current (I Na) in both a non-cardiomyocyte heterologous expression system and native cardiomyocytes [ xref ]."
sparser
"Since SCN5A is widely and definitively linked to DCM genetic architecture, and considering that a loss of interaction between SNTA1 and SCN5A could alter the sodium channel availability or biophysical properties, we can hypothesize that SNTA1 might contribute to the SCN5A-mediated phenotypes in DCM."
sparser
"A257G) which precipitated a marked increase in peak I Na and altered Nav1.5 channel kinetics in both HEK293 cells and cardiomyocytes through direct interaction of mutant SNTA1 with SCN5A. xref All these findings suggest that SNTA1 is a crucial Nav1.5 channel interacting protein (ChIP) involved in maintaining the normal function of the cardiac sodium channel."
reach
"Moreover, the functional studies for the complex SCN5A and SNTA1 (lacking both nNOS and PMCA4b) or SCN5A, SNTA1, and nNOS complex (lacking PMCA4b) suggest that the three SNTA1 mutations do not cause increased late I Na by a direct interaction between SNTA1 and SCN5A or between SNTA1 and nNOS."