The invention discloses a construction method and application of a spontaneous
atrial fibrillation mouse model, and belongs to the technical field of
atrial fibrillation animal models. According to the construction method, a whole-body DYNLT1
gene knockout mouse is constructed by using technologies such as
gene editing and the like, the DYNLT1
gene knockout mouse is systematically evaluated through methods such as
body surface electrocardiogram, echocardiography and histopathologic examination, and the DYNLT1
gene knockout mouse shows typical characteristics of
atrial fibrillation in the aspects of
body surface electrophysiology, atrial structure remodeling and the like. And in the
molecular level, atrial
muscle cell apoptosis is increased, gap junction
protein expression is reduced, and inflammatory
factor level is increased, so that the model is confirmed to be a spontaneous atrial
fibrillation mouse model. In addition, the model shows a rapid
drug reaction to the atrial
fibrillation cardioversion drugs, such as
amiodarone and propafenone, and has the potential for screening the atrial
fibrillation drugs. The
animal model provides a new
pathological model for atrial fibrillation mechanism research and
drug screening, and has important scientific research and clinical application values.