CD63 Knockout THP-1 Cell Line

The choice depends on whether you are studying CD63 (LAMP3, tetraspanin TSPAN30)'s role as a late endosomal/lysosomal tetraspanin or modeling its classical role as an exosome and tumor surface marker. The Knockout line is the standard tool for asking whether CD63 is required for these processes — CD63 is a four-transmembrane tetraspanin highly enriched on late endosomes, lysosomes, and intraluminal vesicles of multivesicular bodies (MVBs), making CD63 one of the most reliable exosome and MVB markers; CD63 also has roles in melanosome biogenesis and platelet activation. Overexpression is useful for studying CD63 in heterologous expression contexts. For exosome research, the EDITGENE CD63 Knockout in THP-1 is highly informative — THP-1 is a human monocytic leukemia cell line providing a myeloid context for studying CD63's role in exosome biogenesis from macrophage-like cells. Other tetraspanin family members (CD9, CD81, CD151) expression analysis aids interpretation. Rescue with wild-type or trafficking-deficient CD63 (Y235A in the AP-3 binding motif) enables structure-function studies. The knockout is valuable for studying CD63-dependent exosome biogenesis and cargo loading, MVB biology, and emerging CD63-targeted approaches in cancer.

Primary applications: • Exosome biogenesis: extracellular vesicle isolation and characterization in CD63-null THP-1 macrophages — CD63 is a classical exosome marker and its loss may affect exosome biogenesis and cargo. • MVB biology: multivesicular body morphology and intraluminal vesicle formation analysis. • Tetraspanin family dissection: CD9, CD81, CD151 expression analysis for systematic tetraspanin functional dissection. • Macrophage exosome marker: anti-CD63 antibody specificity validation in extracellular vesicle research. EDITGENE recommends this model for researchers investigating exosome biology and CD63 as the classical exosome/MVB marker.

Yes. CD63 rescue experiments require attention to late endosomal/lysosomal targeting: • Construct design: use a codon-modified CD63 sequence with a small intracellular C-terminal tag (FLAG, HA). CD63 is a four-transmembrane tetraspanin with C-terminal cytoplasmic GYEVM sequence (YXXΦ AP-3 binding motif) for late endosome/lysosome targeting — preserve all elements. • Subcellular localization validation: confirm late endosomal/lysosomal localization by CD63-LAMP1 co-staining. • Trafficking-deficient rescue: Y235A mutation in the AP-3 binding motif redirects CD63 from late endosomes to plasma membrane. • Functional readout: rescue should restore CD63-positive exosome biogenesis. THP-1-specific considerations: • THP-1 is a human acute monocytic leukemia cell line widely used as a monocyte/macrophage model — PMA differentiation generates adherent macrophage-like cells. • Lentiviral transduction efficiency is moderate; suspension and adherent (post-PMA) phenotypes should be characterized separately. • THP-1 retains key monocyte/macrophage markers and is relevant for monocyte/macrophage exosome and surface marker biology.