PXDN Knockout HLE-B3 Cell Line

The choice depends on whether you are studying PXDN (peroxidasin)'s role in basement membrane crosslinking or modeling congenital eye malformations. The Knockout line is the standard tool for asking whether PXDN is required for sulfilimine bond formation in collagen IV — peroxidasin generates hypobromite (HOBr) from H₂O₂ and bromide to crosslink collagen IV NC1 domains, a unique covalent modification essential for basement membrane integrity. Overexpression is useful for studying PXDN in heterologous systems or for testing peroxidase activity. For ocular development and basement membrane research, the EDITGENE PXDN Knockout in B-3 is highly relevant — B-3 is a human lens epithelial cell line, and PXDN mutations cause anterior segment dysgenesis (sclerocornea, microphthalmia, congenital cataracts) through disrupted lens basement membrane formation. Rescue with wild-type, peroxidase-dead (active site mutant), or disease-associated mutant PXDN enables comprehensive structure-function and disease modeling studies.

Primary applications: • Sulfilimine bond formation: collagen IV NC1 hexamer crosslinking analysis by SDS-PAGE under reducing/non-reducing conditions to assess PXDN-dependent sulfilimine bond formation. • Basement membrane integrity: lens basement membrane imaging in B-3 lens epithelial context given PXDN's role in basement membrane assembly. • Anterior segment dysgenesis modeling: rescue with patient-derived PXDN mutations for genotype-function correlation studies of congenital eye malformations. • Peroxidase activity assays: in vitro hypobromite production and substrate analysis using recombinant or immunoprecipitated PXDN. EDITGENE recommends this model for researchers investigating peroxidasin biology, collagen IV biology, lens development, and congenital ocular dysgenesis mechanisms.

Yes. PXDN rescue experiments require attention to secretion and peroxidase activity: • Construct design: use a codon-modified PXDN sequence with a small internal or C-terminal tag (FLAG, HA). PXDN is a large (~1479 aa) secreted/basement membrane-associated peroxidase with leucine-rich repeats and immunoglobulin domains — preserve all elements. • Peroxidase-dead rescue: active site mutations (typically targeting the conserved histidine residues coordinating the heme group) abolish peroxidase activity and serve as the standard specificity control. • Anterior segment dysgenesis mutation rescue: patient-derived PXDN mutations enable disease genotype-function correlation studies. • Functional readout: rescue should restore collagen IV NC1 sulfilimine crosslinking and basement membrane integrity. B-3 is a human lens epithelial cell line — transduction efficiency may vary; consider optimization compared to standard transformed cell lines.