MC1R Knockout A-375 Cell Line

The choice depends on whether you are studying MC1R (melanocortin-1 receptor)'s role as the principal regulator of eumelanin versus pheomelanin synthesis or modeling MC1R variant-associated melanoma risk and UV protection. The Knockout line is the standard tool for asking whether MC1R is required for these processes — MC1R is a Gs-coupled GPCR expressed on melanocytes that, upon α-MSH binding, drives cAMP-PKA-MITF signaling to switch from pheomelanin (light-protective-poor) to eumelanin (dark-protective) synthesis. Overexpression is useful for studying MC1R in heterologous expression contexts. For melanoma research, the EDITGENE MC1R Knockout in A-375 is highly informative — A-375 is a BRAF V600E-mutant melanoma cell line, and MC1R loss-of-function variants (red hair color/RHC variants R151C, R160W, D294H) confer 2-4 fold increased melanoma risk and reduced UV photoprotection. Rescue with wild-type or RHC-variant (R151C, R160W, D294H, V60L) MC1R enables comprehensive disease genotype-function studies. The knockout is a critical specificity control for MC1R agonists (afamelanotide/Scenesse, approved for erythropoietic protoporphyria photoprotection) and emerging MC1R-targeted skin protection compounds.

Primary applications: • α-MSH-induced cAMP signaling: cellular cAMP measurement following α-MSH or NDP-MSH (Nle⁴-D-Phe⁷-α-MSH) stimulation to characterize MC1R Gs-coupled signaling. • Melanin synthesis: in heterologous melanocyte-relevant contexts, eumelanin/pheomelanin ratio analysis given MC1R's role in pigment switching. • RHC variant modeling: rescue with red hair color variants (R151C, R160W, D294H, V60L) for genotype-function studies of MC1R loss-of-function variants associated with melanoma risk. • Afamelanotide specificity: critical genetic control for afamelanotide (Scenesse, FDA-approved for EPP photoprotection) and emerging MC1R-targeted skin protection compounds. EDITGENE recommends this model for researchers investigating MC1R signaling, melanoma risk biology, and MC1R-targeted photoprotection therapeutic development.

Yes. MC1R rescue experiments are well-established for melanoma and pigmentation research: • Construct design: use a codon-modified MC1R sequence with a small intracellular C-terminal tag (FLAG, HA). MC1R is a seven-transmembrane GPCR — N-terminal tags after the signal peptide are tolerated. • RHC variant rescue: red hair color-associated variants (R151C, R160W, D294H, V60L) introduced for melanoma risk genotype-function studies. • Signaling-deficient rescue: DRY motif mutations disrupt Gs-coupling without affecting α-MSH binding. • Functional readout: rescue should restore α-MSH-induced cAMP elevation (Gs signaling) and MITF target gene expression. A-375-specific considerations: • A-375 is a human melanoma cell line (BRAF V600E-mutant) — a standard model for melanoma biology and MAPK pathway-driven cancer research. • A-375 transduces efficiently with lentivirus and supports stable rescue line generation. • The BRAF V600E background should be considered when interpreting MAPK pathway-related phenotypes.