Atrial Natriuretic Peptide (ANP) (1-28), rat (TFA) is a major circulating form of ANP in rats, potently inhibits Angiotensin II (Ang II)-stimulated endothelin-1 secretion in a concentration-dependent manner.
Atrial Natriuretic Peptide (ANP) (1-28), rat TFA is a synthetic peptide corresponding to the biologically active 28-amino acid sequence of rat atrial natriuretic peptide, formulated as the trifluoroacetate (TFA) salt. As a member of the natriuretic peptide family, ANP is recognized for its critical regulatory roles in cardiovascular and renal physiology, particularly in modulating blood pressure, electrolyte homeostasis, and fluid balance. The rat-derived sequence is widely utilized in preclinical research due to its high degree of homology with mammalian ANP isoforms, making it an essential tool for investigating peptide-mediated signaling pathways, receptor pharmacology, and downstream molecular mechanisms in experimental models.
Peptide signaling research: ANP (1-28), rat is extensively employed to elucidate the molecular mechanisms underlying natriuretic peptide receptor activation and downstream signaling cascades. By serving as a selective ligand for natriuretic peptide receptor-A (NPR-A), it enables researchers to investigate cyclic guanosine monophosphate (cGMP) production, protein kinase G activation, and the modulation of ion transporters in cardiovascular and renal tissues. These studies are fundamental for advancing the understanding of peptide hormone signaling and its physiological impact on blood pressure regulation and fluid homeostasis.
Receptor binding and pharmacology: The compound is a valuable standard for receptor binding assays, allowing for precise characterization of ligand-receptor interactions in both native and recombinant systems. Its use facilitates detailed analysis of NPR-A binding kinetics, receptor affinity, and competitive inhibition by analogs or antagonists. Such investigations are crucial for drug discovery programs targeting natriuretic peptide pathways and for the development of novel pharmacological modulators with potential applications in cardiovascular research.
Cellular physiology and functional assays: Researchers utilize rat ANP (1-28) in a variety of in vitro and ex vivo models to assess its effects on cell signaling, ion channel activity, and cellular contractility. Application in cultured cardiomyocytes, vascular smooth muscle cells, or kidney-derived cell lines enables the dissection of peptide-induced responses at the cellular level, including modulation of intracellular calcium, nitric oxide production, and gene expression. These functional studies provide mechanistic insights into the peptide's role in cardiovascular and renal function.
Peptide synthesis and analytical standards: The well-characterized sequence and structure of ANP (1-28) make it an important reference material in peptide synthesis and analytical method development. It serves as a calibration standard in high-performance liquid chromatography (HPLC), mass spectrometry, and peptide mapping workflows, supporting quality control and validation of synthetic processes. Additionally, it is used as a benchmark for the synthesis and purification of ANP analogs or modified peptides in research and development settings.
Comparative physiology and animal model studies: Owing to its species-specific sequence, rat ANP (1-28) is particularly suited for comparative studies in rodent models. It is used to investigate the physiological and pathophysiological roles of natriuretic peptides in vivo, including modulation of renal excretion, vascular tone, and cardiac function. Such applications are instrumental in delineating species differences in peptide signaling and in translating preclinical findings to broader physiological contexts.
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