Cardiac Toxicity of Cadmium Involves Complex Interaction Between Multiple Ion Currents in Rainbow Trout ( Oncorhynchus mykiss ) Ventricular Myocytes

2021 ◽  
Author(s):  
Jaakko Haverinen ◽  
Ahmed Badr ◽  
Matti Vornanen
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Cardiac Toxicity ◽  
Ventricular Myocytes ◽  
Complex Interaction ◽  
Ion Currents ◽  
Rainbow Trout Oncorhynchus Mykiss

scholarly journals Ionic basis of atrioventricular conduction: ion channel expression and sarcolemmal ion currents of the atrioventricular canal of the rainbow trout (Oncorhynchus mykiss) heart

2021 ◽  
Vol 191 (2) ◽  
pp. 327-346 ◽  
Author(s):  
Minna Hassinen ◽  
Irina Dzhumaniiazova ◽  
Denis V. Abramochkin ◽  
Matti Vornanen
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Ion Channel ◽  
Ventricular Myocytes ◽  
Transitional Cell ◽  
Resting Membrane Potential ◽  
Ion Currents ◽  
Atrioventricular Canal ◽  
Pacemaker Channel ◽  
Nodal Tissue

AbstractAtrioventricular (AV) nodal tissue synchronizes activities of atria and ventricles of the vertebrate heart and is also a potential site of cardiac arrhythmia, e.g., under acute heat stress. Since ion channel composition and ion currents of the fish AV canal have not been previously studied, we measured major cation currents and transcript expression of ion channels in rainbow trout (Oncorhynchus mykiss) AV tissue. Both ion current densities and expression of ion channel transcripts indicate that the fish AV canal has a characteristic electrophysiological phenotype that differs from those of sinoatrial tissue, atrium and ventricle. Two types of cardiomyocytes were distinguished electrophysiologically in trout AV nodal tissue: the one (transitional cell) is functionally intermediate between working atrial/ventricular myocytes and the other (AV nodal cell) has a less negative resting membrane potential than atrial and ventricular myocytes and is a more similar to the sinoatrial nodal cells in ion channel composition. The AV nodal cells are characterized by a small or non-existent inward rectifier potassium current (IK1), low density of fast sodium current (INa) and relatively high expression of T-type calcium channels (CACNA3.1). Pacemaker channel (HCN4 and HCN2) transcripts were expressed in the AV nodal tissue but If current was not found in enzymatically isolated nodal myocytes. The electrophysiological properties of the rainbow trout nodal cells are appropriate for a slow rate of action potential conduction (small INa) and a moderate propensity for pacemaking activity (absence of IK1).

The essential oils of some medicinal plants on the immune system of rainbow trout (Oncorhynchus mykiss)

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
A Ghasemi Pirbalouti ◽  
E Pirali ◽  
G Pishkar ◽  
S Mohammadali Jalali ◽  
M Reyesi ◽  
...  
Keyword(s):  
Immune System ◽  
Rainbow Trout ◽  
Medicinal Plants ◽  
Oncorhynchus Mykiss ◽  
Essential Oils ◽  
Rainbow Trout Oncorhynchus Mykiss

Nuclear distribution of genotoxic damage in rainbow trout (Oncorhynchus mykiss) sperm after cryopreservation

2014 ◽  
Author(s):  
Silvia Gonzalez-Rojo ◽  
Cristina Fernandez-Diez ◽  
Marta Lombo ◽  
Vanesa Robles Rodriguez ◽  
Herraez Maria Paz
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Genotoxic Damage ◽  
Nuclear Distribution ◽  
Rainbow Trout Oncorhynchus Mykiss
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