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Curr Med Chem. 2019 Jul 11. doi: 10.2174/0929867326666190712091515. [Epub ahead of print]

Inflammation as the common biological link between depression and cardiovascular diseases: Can carnosine exert a protective role?

Author information

1
Oasi Research Institute - IRCCS, 94018 Troina. Italy.
2
Department of Biomedical and Biotechnological Sciences, Section of Pharmacology, University of Catania, 94018 Catania. Italy.
3
Department of Drug Sciences, University of Catania, 95125 Catania. Italy.
4
Department of Biomedical and Biotechnological Sciences, Division of Medical Biochemistry, University of Catania, 94018 Catania. Italy.
5
Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, 66045 Lawrence, Kansas. United States.

Abstract

Several epidemiological studies have clearly shown the high co-morbidity between depression and cardiovascular diseases (CVD). Different studies have been conducted to identify the common pathophysiological events of these diseases such as the overactivation of the hypothalamic-pituitary-adrenal axis and, most importantly, the dysregulation of immune system which causes a chronic pro-inflammatory status. The biological link between depression, inflammation, and CVD can be related to high levels of pro-inflammatory cytokines, such as IL-1β, TNF-α, and IL-6, released by macrophages which play a central role in the pathophysiology of both depression and CVD. Pro-inflammatory cytokines interfere with many of the pathophysiological mechanisms relevant of depression by upregulating the rate-limiting enzymes in the metabolic pathway of tryptophan and altering serotonin metabolism. These cytokines also increase the risk to develop CVD, because activation of macrophages under thispro-inflammatory status is closely associated with endothelial dysfunction and oxidative stress, a preamble to atherosclerosis and atherothrombosis. Carnosine (β-alanyl-L-histidine) is an endogenous dipeptide which exerts a strong anti- inflammatory activity on macrophages by suppressing reactive species and pro-inflammatory cytokines production and altering pro-inflammatory/anti-inflammatory macrophage polarization. This dipeptide exhibits antioxidant properties scavenging reactive species, preventing oxidative stress-induced pathologies such as CVD. In the present review we will discuss the role of oxidative stress and chronic inflammation as common pathophysiological events both in depression and CVD and the preclinical and clinical evidence on the protective effect of carnosine in both diseases as well as the therapeutic potential of this dipeptide in depressed patients with a high co-morbidity of cardiovascular diseases.

KEYWORDS:

Cardiovascular diseases; Carnosine; Depression; Inflammation; Macrophages; Oxidative stress

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