Obesity Is a Major Determinant of Impaired Cardiac Energy Metabolism in Heart Failure with Preserved Ejection Fraction.

Heart failure with preserved ejection fraction (HFpEF) is a major health problem with limited treatment options. Although optimizing cardiac energy metabolism is a potential approach to treating heart failure, it is poorly understood what alterations in cardiac energy metabolism actually occur in HFpEF. To determine this, we used mice in which HFpEF was induced using an obesity and hypertension HFpEF protocol for 10 weeks.

Past and present of beta arrestins: A new perspective on insulin secretion and effect.

Background: Beta arrestins had been known as intracellular adaptors that uncouple and inactivate the G protein-coupled receptors that they interact with. Their roles as signal initiators for some receptors have recently been recognized.

Scope Of Review: In this review, we focused on their role in mediating metabolic modulation primarily in relation to insulin signaling.

SARS-CoV-2 Infection may be Prevented with Cytochrome Inhibitors: Cobicistat and Ritonavir.

Objective: Highly contagious character of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and the lack of specific drugs have led many scientists worldwide to re-evaluate the molecules currently in use for other diseases/viruses. Thus, high-throughput screening with docking studies has the rationale to identify potential therapeutics from existing drug molecules. Conflicting results of the studies, including SARS-CoV-2 and human immunodeficiency virus (HIV) coinfected population, suggested a possible preventive effect of antiretroviral regimens they have been receiving.

Pleiotropic vascular effects of ivabradine in streptozotocin-induced diabetes.

Aims: Ivabradine (IVA) reduces heart rate (HR) by inhibiting hyperpolarization-activated cyclic nucleotide-gated (HCN) channels in sinoatrial node. Studies suggest that IVA has other beneficial effects on cardiovascular system that are not related to its effect on HR such as prevention of endothelial injury and the antioxidant effects. In addition to sinoatrial node, HCN channels exist in other tissues and their expression pattern differs in certain pathologies such as hypertension and hypertrophy.

Metabolic effects of carvedilol through β-arrestin proteins: investigations in a streptozotocin-induced diabetes rat model and in C2C12 myoblasts.

Background And Purpose: Carvedilol is a third-generation β-adrenoceptor antagonist, which also stimulates β-arrestins. β-arrestins initiate intracellular signalling and are involved in insulin release and sensitivity. Carvedilol is superior in effectiveness to other drugs that are used for similar indications and does not cause insulin resistance or diabetes, which can occur with other β-antagonists.