CARDIOVASCULAR JOURNAL OF AFRICA • Volume 30, No 2, March/April 2019
AFRICA
85
Conclusion
This study is the first to demonstrate the direct inhibitory
effect of All on the I
Na,Late
current in SHR atrial myocytes in a
concentration-dependent fashion. The underlying mechanisms
may be partially explained by their roles in reducing the sodium
channel window current. This provides, at least in part, a
potential for the application of All in anti-arrhythmia patients.
We thank the members of our laboratories for their insight and technical
support, and also the National Natural Science Foundation of China (grant
no. 81870249, 81671731, 81470542).
References
1.
Schotten U, Verheule S, Kirchhof P, Goette A. Pathophysiological
mechanisms of atrial fibrillation: a translational appraisal.
Physiol Rev
2011;
91
: 265–325.
2.
Choisy SC, Arberry LA, Hancox JC, James AF. Increased susceptibil-
ity to atrial tachyarrhythmia in spontaneously hypertensive rat hearts.
Hypertension
2007;
49
: 498–505.
3.
Scridon A, Gallet C, Arisha MM, Oréa V, Chapuis B, Li N,
et al
.
Unprovoked atrial tachyarrhythmias in aging spontaneously hyperten-
sive rats: the role of the autonomic nervous system.
Am J Physiol Heart
Circ Physiol
2012;
303
: H386–392.
4.
Parikh A, Patel D, McTiernan CF, Xiang W, Haney J, Yang L,
et al
.
Relaxin suppresses atrial fibrillation by reversing fibrosis and myocyte
hypertrophy and increasing conduction velocity and sodium current
in spontaneously hypertensive rat hearts.
Circ Res
2013;
113
: 313–321.
5.
Yue L, Feng J, Gaspo R, Li GR, Wang Z, Nattel S. Ionic remodeling
underlying action potential changes in a canine model of atrial fibrilla-
tion.
Circ Res
1997;
81
: 512–525.
6.
Zhang Y, Wang HM, Wang YZ, Zhang YY, Jin XX, Zhao Y,
et al.
Increment of late sodium currents in the left atrial myocytes and its
potential contribution to increased susceptibility of atrial fibrillation in
castrated male mice.
Heart Rhythm
2017;
14
: 1073–1080.
7.
Justo F, Fuller H, Nearing BD, Rajamani S, Belardinelli L, Verrier RL.
Inhibition of the cardiac late sodium current with eleclazine protects
against ischemia-induced vulnerability to atrial fibrillation and reduces
atrial and ventricular repolarization abnormalities in the absence and
presence of concurrent adrenergic stimulation.
Heart Rhythm
2016;
13
:
1860–1867.
8.
Li Y, Wang S, Liu Y, Li Z, Yang X, Wang H,
et al
. Effect of alpha-
allocryptopine on transient outward potassium current in rabbit ventric-
ular myocytes.
Cardiology
2008;
111
: 229–236.
9.
Liu MH, Li Y, Wen Y, Wang L. The effect of allocryptopine on arrhyth-
mia and monophasic action potential in animal models.
Chin J Mult
Organ Dis Elder
2006;
5
: 48–50.
10. ZhangJ,ChenY,YangJ,XuB,WenY,XiangG,
etal
.Electrophysiological
and trafficking defects of the SCN5A T353I mutation in Brugada
syndrome are rescued by alpha-allocryptopine.
Eur J Pharmacol
2015;
746
: 333–343.
11. Kannel WB, Wolf PA, Benjamin EJ, Levy D. Prevalence, incidence,
prognosis, and predisposing conditions for atrial fibrillation: popula-
tion-based estimates.
Am J Cardiol
1998;
82
: 2N–9N.
12. Aksnes TA, Flaa A, Strand A, Kjeldsen SE. Prevention of new-onset
atrial fibrillation and its predictors with angiotensin II-receptor block-
ers in the treatment of hypertension and heart failure.
J Hypertens
2007;
25
(1): 15–23.
13. Maltsev VA, Silverman N, Sabbah HN, Undrovinas AI. Chronic heart
failure slows late sodium current in human and canine ventricular
myocytes: implications for repolarization variability.
Eur J Heart Fail
2007;
9
: 219–27.
14. Song Y, Shryock JC, Wagner S, Maier LS, Belardinelli L. Blocking late
sodium current reduces hydrogen peroxide-induced arrhythmogenic activ-
ity and contractile dysfunction.
J Pharmacol Exp Ther
2006;
318
: 214–222.
15. Chang PC, Huang YC, Lee HL, Chang GJ, Chu Y, Wen MS,
et al.
Inhomogeneous downregulation of INa underlies piceatannol proar-
rhythmic mechanism in regional ischemia-reperfusion.
Pacing Clin
Electrophysiol
2018;
41
(9): 1116–1122.
16. Dybkova N, Ahmad S, Pabel S, Tirilomis P, Hartmann N, Fischer TH,
et
al
. Differential regulation of sodium channels as a novel proarrhythmic
mechanism in the human failing heart.
Cardiovasc Res
2018;
114
(13):
1728–1737.
17. Ahmad S, Tirilomis P, Pabel S, Dybkova N, Hartmann N, Molina CE,
et
al.
The functional consequences of sodium channel NaV 1.8 in human
left ventricular hypertrophy.
ESC Heart Fail
2018 Oct 30.
doi: 10.1002/
ehf2.12378.
18. Abe K, Machida T, Sumitomo N, Yamamoto H, Ohkubo K, Watanabe
I,
et al
. Sodium channelopathy underlying familial sick sinus syndrome
with early onset and predominantly male characteristics.
Circ Arrhythm
Electrophysiol
2014;
7
(3): 511–517.
19. Sossalla S, Kallmeyer B, Wagner S, Mazur M, Maurer U, Toischer K,
et
al.
Altered Na(+) currents in atrial fibrillation effects of ranolazine on
arrhythmias and contractility in human atrial myocardium.
J Am Coll
Cardiol
2010;
55
: 2330–2342.
20. Nattel S, Dobrev D. The multidimensional role of calcium in atrial fibrilla-
tion pathophysiology: mechanistic insights and therapeutic opportunities.
Eur Heart J
2012;
33
: 1870–1877.
21. Blana A, Kaese S, Fortmüller L, Laakmann S, Damke D, van Bragt K,
et al
. Knock-in gain-of-function sodium channel mutation prolongs atrial
action potentials and alters atrial vulnerability.
Heart Rhythm
2010;
7
:
1862–1869.
22. Yu S, Li G, Huang CL, Lei M, Wu L. Late sodium current associated
cardiac electrophysiological and mechanical dysfunction.
Pflugers Arch
2018;
470
(3): 461–469.
23. Burashnikov A. Late INa inhibition as an antiarrhythmic strategy.
J
Cardiovasc Pharmacol
2017;
70
(3): 159–167.
24. Ruan Y, Denegri M, Liu N, Bachetti T, Seregni M, Morotti S,
et al
.
Trafficking defects and gating abnormalities of a novel SCN5A mutation
question gene-specific therapy in long QT syndrome type 3.
Circ Res
2010;
106
: 1374–1383.
25. Pezhouman A, Cao H, Fishbein MC, Belardinelli L, Weiss JN,
Karagueuzian HS. Atrial fibrillation initiated by early afterdepolarization-
mediated triggered activity during acute oxidative stress: efficacy of late
sodium current blockade.
J Heart Health
2018;
4
(1). doi: 10.16966/2379-
769X.146.
26. Carneiro JS, Bento AS, Bacic D, Nearing BD, Rajamani S, Belardinelli
L,
et al
. The selective cardiac late sodium current inhibitor GS-458967
suppresses autonomically triggered atrial fibrillation in an intact porcine
model.
J Cardiovasc Electrophysiol
2015;
26
(12): 1364
–136
9.
27. Strege P, Beyder A, Bernard C, Crespo-Diaz R, Behfar A, Terzic A,
et
al.
Ranolazine inhibits shear sensitivity of endogenous Na
+
current and
spontaneous action potentials in HL-1 cells.
Channels
2012;
6
: 457–462.
28. Pignier C, Rougier JS, Vié B, Culié C, Verscheure Y, Vacher B,
et al
.
Selective inhibition of persistent sodium current by F 15845 prevents
ischaemia-induced arrhythmias.
Br J Pharmacol
2010;
161
: 79–91.
29. Xu B, Fu Y, Liu L, Lin K, Zhao X, Zhang Y,
et al
. Effect of
α
-allocryptopine on delayed afterdepolarizations and triggered activi-
ties in mice cardiomyocytes treated with isoproterenol.
Evid Based
Complement Alternat Med
2015;
634172
. doi: 10.1155/2015/634172.