Sfrp5 Knockout 3T3-L1 Cell Line

The Sfrp5 Knockout 3T3-L1 Cell Line is a CRISPR/Cas9-engineered mouse cell model in which the Sfrp5 gene has been disrupted to eliminate functional SFRP5 expression. This stable gene-edited in vitro system is generated in the 3T3-L1 host line, a well-established murine preadipocyte model. Because SFRP5 is a secreted frizzled-related protein that modulates WNT ligand-dependent signaling, this knockout cell line provides a defined platform for studying how loss of extracellular WNT antagonism influences adipocyte-lineage signaling and phenotype.

3T3-L1 cells are fibroblast-like preadipocytes that undergo hormone-induced differentiation into lipid-accumulating adipocytes and are widely used to investigate adipogenesis, insulin responsiveness, adipokine biology, and inflammatory-metabolic crosstalk. Their robust differentiation program and tractable response to metabolic and inflammatory stimuli make them a standard model for adipose tissue-related research. In this context, 3T3-L1 cells are particularly useful for examining molecular events linked to obesity, insulin resistance, type 2 diabetes, metabolic syndrome, adipose tissue inflammation, and nonalcoholic fatty liver disease.

At the molecular level, SFRP5 functions as a secreted WNT antagonist that interacts with WNT ligands, particularly WNT5A-associated signaling, and modulates signaling through frizzled receptors such as FZD2 and FZD5 as well as co-receptors and related factors including ROR2, LRP5, and LRP6. Through these interactions, SFRP5 influences the balance between non-canonical WNT/JNK signaling and beta-catenin pathway regulation involving DVL2, CTNNB1, and GSK3beta. In adipocyte-related settings, Sfrp5 expression is regulated by adipocyte differentiation cues and transcriptional programs associated with PPARG and CEBPA, and can also be influenced by inflammatory stimuli, TNF-alpha, metabolic stress, and nutrient excess. Loss of Sfrp5 is therefore relevant for examining signaling events downstream of WNT5A, including JNK1/2 phosphorylation, c-JUN activity, inflammatory cytokine expression such as IL6, TNF-alpha, and CCL2, as well as effects on adipogenic markers including PPARG, CEBPA, and adiponectin.

Within the 3T3-L1 background, Sfrp5 knockout is a biologically meaningful model for defining how extracellular regulation of WNT signaling shapes adipocyte differentiation and metabolic function. This system enables investigation of how altered WNT5A-ROR2/FZD signaling affects adipogenesis, insulin-stimulated signaling responsiveness, and inflammatory output in adipocyte precursor cells and differentiated adipocytes. It is also relevant for studying how perturbation of adipokine-regulated signaling contributes to disease-associated phenotypes linked to obesity and insulin resistance.

This cell line can be applied in adipogenic differentiation assays combined with Oil Red O staining to quantify lipid accumulation, RT-qPCR or RNA-seq to profile adipogenic and inflammatory gene-expression programs, and western blotting for phospho-JNK, c-JUN, PPARG, CEBPA, or insulin-stimulated AKT phosphorylation. Investigators may also use ELISA or cytokine profiling to assess secreted inflammatory mediators, TOPFlash/FOPFlash reporter assays to examine beta-catenin-related pathway modulation, immunofluorescence to monitor differentiation-associated markers, co-immunoprecipitation to study pathway-associated protein interactions, and glucose uptake assays to evaluate metabolic responsiveness. Researchers may contact Ascent Research for additional technical information, product details, or related gene-edited cell models.