Efficacy and safety of an algorithm using C-reactive protein to guide antibiotic therapy applied through a digital clinical decision support system: a study protocol for a randomised controlled clinical trial.

Introduction: The escalating resistance of microorganisms to antimicrobials poses a significant public health threat. Strategies that use biomarkers to guide antimicrobial therapy-most notably Procalcitonin (PCT) and C-reactive protein (CRP)-show promise in safely reducing patient antibiotic exposure. While CRP is less studied, it offers advantages such as lower cost and broader availability compared with PCT.

Role of Beta-adrenergic Receptors and Sirtuin Signaling in the Heart During Aging, Heart Failure, and Adaptation to Stress.

In the heart, catecholamine effects occur by activation of beta-adrenergic receptors (β-ARs), mainly the beta 1 (β-AR) and beta 2 (β-AR) subtypes, both of which couple to the Gs protein that activates the adenylyl cyclase signaling pathway. The β-ARs can also couple to the Gi protein that counterbalances the effect of the Gs protein on cyclic adenosine monophosphate production and activates the phosphatidylinositol 3-kinase (PI3K)-Akt signaling pathway. In several cardiovascular disorders, including heart failure, as well as in aging and in animal models of environmental stress, a reduction in the β/β-AR ratio and activation of the β-AR-Gi-PI3K-Akt signaling pathway have been observed.