The present invention relates to methods, kits and compositions to treat hypertension and other cardiovascular diseases in a subject, in particular, a method of treating or preventing a cardiovascular disease in a subject comprising administering to a subject at least one anti-miR agent to miRNA-425. In some embodiments, an anti-miR agent is a small molecule or an oligonucleotide complementary to at least part of the miR-425 of SEQ ID NO: 1, or an anti-miR complementary to at least part of the miRNA seed sequence AUGACA (SEQ ID NO: 2). Another aspect of the present invention relates to methods, kits and compositions to treat low blood pressure in a subject comprising administering a composition comprising a miR-425 agent to decrease ANP levels in the subject. Other aspects of the present invention relates to assays, methods and systems to identify a subject at risk of hypertension, or identifying a subject suitable to administration of an anti-miR-425 agent for treatment of hypertension, the assay comprising assessing if a subject is homozygous or heterozygous for the major (A) allele of rs5068 SNP, and/or assaying for levels of miR-425 and/or assaying for levels of NT-proANP and/or levels of ANP in the plasma of a subject.