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Infusion of esmolol attenuates lipopolysaccharide-induced myocardial dysfunction. 2016

Zenggeng Wang, and Qinghua Wu, and Xiangbi Nie, and Jinghua Guo, and Chunli Yang
Nanchang University, Nanchang, China; Intensive Care Unit, Jiangxi Provincial People's Hospital, Nanchang, China.

BACKGROUND Myocardial depression, as a well-recognized manifestation of cardiac dysfunction, often accompanies severe sepsis and septic shock. Inflammation-induced myocardial apoptosis is key to the development of sepsis-induced cardiac dysfunction. Increasing evidence suggests the anti-inflammatory role of β1-adrenergic blocker, esmolol, during lethal endotoxemia. However, the direct protective effect of esmolol on cardiomyocyte viability during sepsis is still not clear. Here, we aimed to study whether infusion of esmolol can directly inhibit myocardial apoptosis during lipopolysaccharide (LPS)-triggered inflammatory insult. METHODS C57BL/6 mice were randomized into four groups as follows: control; esmolol infusion; LPS insult; and esmolol infusion + LPS insult. Function of left ventricle was assessed by invasive hemodynamics at 6 h after LPS insult. Terminal deoxynucleotidyl transferase mediated dUTP nick end labeling (TUNEL) staining, caspase-3 expression level, and the Bcl-2/Bax ratio were used to evaluate myocardial apoptosis at 6 h after LPS insult or esmolol infusion. RESULTS Administration of LPS resulted in significant decrease in left ventricular end-systolic pressure, reduced maximal rate of change of left ventricular pressure, and the increase in left ventricular end-diastolic pressure. Esmolol infusion reversed LPS-induced impairment of cardiac function and reduced LPS-induced myocardial apoptosis that is associated with c-Jun N-terminal kinase (JNK) and p38 activation. CONCLUSIONS These data demonstrate that cardioprotection provided by esmolol infusion during LPS insult is associated with antiapoptotic effects and regulation of JNK and p38 activations.

UI MeSH Term Description Entries
D007263 Infusions, Parenteral The administration of liquid medication, nutrient, or other fluid through some other route than the alimentary canal, usually over minutes or hours, either by gravity flow or often by infusion pumping. Intra-Abdominal Infusions,Intraperitoneal Infusions,Parenteral Infusions,Peritoneal Infusions,Infusion, Intra-Abdominal,Infusion, Intraperitoneal,Infusion, Parenteral,Infusion, Peritoneal,Infusions, Intra-Abdominal,Infusions, Intraperitoneal,Infusions, Peritoneal,Intra Abdominal Infusions,Intra-Abdominal Infusion,Intraperitoneal Infusion,Parenteral Infusion,Peritoneal Infusion
D008070 Lipopolysaccharides Lipid-containing polysaccharides which are endotoxins and important group-specific antigens. They are often derived from the cell wall of gram-negative bacteria and induce immunoglobulin secretion. The lipopolysaccharide molecule consists of three parts: LIPID A, core polysaccharide, and O-specific chains (O ANTIGENS). When derived from Escherichia coli, lipopolysaccharides serve as polyclonal B-cell mitogens commonly used in laboratory immunology. (From Dorland, 28th ed) Lipopolysaccharide,Lipoglycans
D008297 Male Males
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D009202 Cardiomyopathies A group of diseases in which the dominant feature is the involvement of the CARDIAC MUSCLE itself. Cardiomyopathies are classified according to their predominant pathophysiological features (DILATED CARDIOMYOPATHY; HYPERTROPHIC CARDIOMYOPATHY; RESTRICTIVE CARDIOMYOPATHY) or their etiological/pathological factors (CARDIOMYOPATHY, ALCOHOLIC; ENDOCARDIAL FIBROELASTOSIS). Myocardial Disease,Myocardial Diseases,Myocardial Diseases, Primary,Myocardial Diseases, Secondary,Myocardiopathies,Primary Myocardial Disease,Cardiomyopathies, Primary,Cardiomyopathies, Secondary,Primary Myocardial Diseases,Secondary Myocardial Diseases,Cardiomyopathy,Cardiomyopathy, Primary,Cardiomyopathy, Secondary,Disease, Myocardial,Disease, Primary Myocardial,Disease, Secondary Myocardial,Diseases, Myocardial,Diseases, Primary Myocardial,Diseases, Secondary Myocardial,Myocardial Disease, Primary,Myocardial Disease, Secondary,Myocardiopathy,Primary Cardiomyopathies,Primary Cardiomyopathy,Secondary Cardiomyopathies,Secondary Cardiomyopathy,Secondary Myocardial Disease
D011412 Propanolamines AMINO ALCOHOLS containing the propanolamine (NH2CH2CHOHCH2) group and its derivatives. Aminopropanols
D011897 Random Allocation A process involving chance used in therapeutic trials or other research endeavor for allocating experimental subjects, human or animal, between treatment and control groups, or among treatment groups. It may also apply to experiments on inanimate objects. Randomization,Allocation, Random
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D015153 Blotting, Western Identification of proteins or peptides that have been electrophoretically separated by blot transferring from the electrophoresis gel to strips of nitrocellulose paper, followed by labeling with antibody probes. Immunoblotting, Western,Western Blotting,Western Immunoblotting,Blot, Western,Immunoblot, Western,Western Blot,Western Immunoblot,Blots, Western,Blottings, Western,Immunoblots, Western,Immunoblottings, Western,Western Blots,Western Blottings,Western Immunoblots,Western Immunoblottings
D016277 Ventricular Function, Left The hemodynamic and electrophysiological action of the left HEART VENTRICLE. Its measurement is an important aspect of the clinical evaluation of patients with heart disease to determine the effects of the disease on cardiac performance. Left Ventricular Function,Function, Left Ventricular,Functions, Left Ventricular,Left Ventricular Functions,Ventricular Functions, Left

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