Npr1 Knockout HL-1 Cell Line

The choice depends on whether you are studying NPRA (NPR-A, GC-A)'s role as the principal natriuretic peptide receptor for ANP and BNP in cardiomyocytes or its functions in cardiac hypertrophy regulation and heart failure. The Knockout line is the standard tool for asking whether NPR-A is required for ANP/BNP-induced cGMP generation — NPR-A is a transmembrane guanylyl cyclase activated by ANP and BNP binding to the extracellular domain, generating cGMP for PKG signaling and cardioprotective responses. Overexpression is useful for studying NPR-A in heterologous expression contexts. For cardiomyocyte research, the EDITGENE Nrpa (NPRA) Knockout in HL-1 is highly relevant — HL-1 is a murine atrial cardiomyocyte cell line preserving cardiac contractile phenotypes, providing a physiologically relevant context for cardiac natriuretic peptide signaling research. Rescue with wild-type or guanylyl cyclase-dead NPR-A enables structure-function studies. The knockout is valuable for studying neprilysin inhibitor (sacubitril) and ANP/BNP analog mechanism — sacubitril/valsartan (Entresto) elevates ANP/BNP levels for heart failure therapy. This product complements the parallel NPR1 Knockout in HeLa (also available) for cardiomyocyte versus biochemistry studies.

Primary applications: • Cardiomyocyte ANP/BNP signaling: cGMP generation following ANP/BNP stimulation in physiologically relevant cardiomyocyte context. • Cardiac hypertrophy modeling: hypertrophy markers (ANF, BNP, β-MHC) following phenylephrine or other hypertrophic stimuli in NPRA-null cardiomyocytes. • Sacubitril/valsartan mechanism: Entresto's combined neprilysin inhibition (raising ANP/BNP) and AT1R blockade — NPR-A is the principal mediator of natriuretic peptide cardioprotection. • PKG downstream signaling: phospho-PKG substrates analysis in the NPRA-null cardiomyocyte context. EDITGENE recommends this cardiomyocyte-based model for researchers investigating cardiac natriuretic peptide signaling, heart failure pharmacology, and cardiac hypertrophy mechanisms.

Yes. NPR-A rescue experiments require attention to cardiomyocyte transduction: • Construct design: use a codon-modified Npr1 sequence with a small intracellular C-terminal tag (FLAG, HA). NPR-A has extracellular ANP/BNP-binding domain, single transmembrane span, kinase homology domain (KHD), dimerization domain, and C-terminal guanylyl cyclase domain — preserve all elements. • Guanylyl cyclase-dead rescue: catalytic domain mutations abolish cGMP generation and serve as the standard specificity control. • KHD-mutant rescue: kinase homology domain mutations affect ATP-dependent regulation. • Functional readout: rescue should restore ANP/BNP-induced cGMP generation and downstream PKG signaling in cardiomyocyte context. HL-1-specific considerations: • HL-1 is a murine atrial cardiomyocyte cell line preserving contractile and cardiac gene expression phenotypes — uniquely valuable among continuous cardiac lines. • HL-1 requires specialized culture conditions (Claycomb medium with norepinephrine supplementation) and gelatin/fibronectin-coated surfaces. • Lentiviral transduction is supported but typically with reduced efficiency compared to standard immortalized lines — optimization may be required.