Role of the natriuretic peptide system in lipogenesis/lipolysis

• Published in: Nutrition, metabolism, and cardiovascular diseases Vol. 13; no. 4; pp. 244 - 249
• Main Authors: Dessì-Fulgheri, P., Sarzani, R., Rappelli, A.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.08.2003
• Subjects: adipose tissue; Humans; hypertension; Lipolysis; natriuretic peptide receptors; Natriuretic peptides; Natriuretic Peptides - metabolism; obesity; Obesity - physiopathology; adipose tissue; lipolysis; natriuretic peptide receptors; hypertension; obesity; Natriuretic peptides
• ISSN: 0939-4753; 1590-3729
• DOI: 10.1016/S0939-4753(03)80018-2

Abstract There is recent evidence that the natriuretic peptide (NP) system promotes adipose tissue lipolysis in primates. This effect is mediated by the interaction of NP with its active receptors through guanylyl cyclase activation and cGMP production. This review will briefly focus on the new aspects of NP pathophysiology in man. NP receptors have been described in rodent adipocytes, and the expression of their mRNA is found in human adipose tissue together with high level of ANP binding sites. In isolated fat cells, atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) were able to stimulate lipolysis as much as isoproterenol, a nonselective β-adrenergic receptor agonist, whereas C-type natriuretic peptide (CNP) had the lowest lipolytic effect. The potent lipolytic effect of NP has also been confirmed in samples of abdominal adipose tissue from healthy subjects. The potency order of the lipolytic effect (ANP >BNP >CNP) and ANP-induced cGMP production supported the presence of type A natriuretic peptide receptor in human fat cells. The effect of NP on lipid metabolism is confirmed by the fact that intravenous ANP infusion is followed by plasma NEFA and glycerol concentration increase (reflecting lipid mobilisation). The NP system seems to play an important role in lipid metabolism, possibly affecting the pathophysiology of obesity and obesity-related disorders, such hypertension. Further studies, however, are needed to completely establish the mechanisms involved in NP-induced lipolysis and the real relevance of this new pathway specific of primates.