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Adv Pharmacol ; 94: 183-211, 2022.
Article in English | MEDLINE | ID: mdl-35659372

ABSTRACT

The pregnancy related hormone relaxin is produced throughout the reproductive system. However, relaxin also has important cardiovascular effects as part of the adaptation that the cardiovascular system undergoes in response to the extra demands of pregnancy. These effects are primarily mediated by the relaxin family peptide receptor 1, which is one of four known relaxin receptors. The effects of relaxin on the cardiovascular system during pregnancy, as well as its anti-fibrotic and anti-inflammatory properties, have led to extensive studies into the potential of relaxin therapy as an approach to treat heart failure. Cardiomyocytes, cardiac fibroblasts, and endothelial cells all possess relaxin family peptide receptor 1, allowing for direct effects of therapeutic relaxin on the heart. Many pre-clinical animal studies have demonstrated a beneficial effect of exogenous relaxin on adverse cardiac remodeling including inflammation, fibrosis, cardiomyocyte hypertrophy and apoptosis, as well as effects on cardiac contractile function. Despite this, clinical studies have yielded disappointing results for the synthetic seralaxin, even though seralaxin was well tolerated. This article will provide background on relaxin in the context of normal physiology, as well as the role of relaxin in pregnancy-related adaptations of the cardiovascular system. We will also present evidence from pre-clinical animal studies that demonstrate the potential benefits of relaxin therapy, as well as discussing the results from clinical trials. Finally, we will discuss possible reasons for the failure of these clinical trials as well as steps being taken to potentially improve relaxin therapy for heart failure.


Subject(s)
Heart Diseases , Heart Failure , Hypertension , Relaxin , Animals , Endothelial Cells , Female , Fibrosis , Heart Diseases/chemically induced , Heart Diseases/drug therapy , Heart Failure/chemically induced , Heart Failure/drug therapy , Humans , Hypertension/chemically induced , Hypertension/drug therapy , Pregnancy , Receptors, Peptide/therapeutic use , Recombinant Proteins/therapeutic use , Relaxin/adverse effects
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