SPP1 Knockout RAW264.7 Cell Line

The choice depends on whether you are studying osteopontin's role in macrophage biology, bone remodeling, or its broader functions in immune regulation and cancer. The Knockout line is the standard tool for asking whether SPP1 (osteopontin) is required for macrophage-specific functions in a physiologically relevant cell context. Overexpression is useful for studying secreted osteopontin's autocrine and paracrine effects or for producing recombinant osteopontin reagents. For osteopontin research, the EDITGENE SPP1 Knockout in RAW 264.7 is highly relevant — RAW 264.7 is the standard murine macrophage cell line, and osteopontin is a major macrophage-secreted factor with established roles in osteoclast differentiation, inflammation, and tumor-associated macrophage biology. Rescue with wild-type, RGD-deleted (integrin-binding-deficient), or thrombin-cleavage-resistant osteopontin enables mechanistic dissection of its multiple functional domains.

Primary applications: • Macrophage polarization: M1/M2 marker expression (iNOS, Arg1, CD206) following polarizing stimuli to assess osteopontin's autocrine effects on macrophage biology. • Osteoclastogenesis support: RAW 264.7 differentiation into osteoclast-like cells (RANKL stimulation, TRAP staining) in the absence of macrophage-derived osteopontin. • Recombinant osteopontin production: clean background for producing tagged osteopontin variants without endogenous contamination. • Inflammatory response: LPS-induced cytokine production (TNF-α, IL-6) and migration assays. EDITGENE recommends this model for researchers investigating osteopontin biology, macrophage function, bone biology, and osteoclast differentiation mechanisms.

Yes. Osteopontin rescue experiments require attention to its secreted protein biology: • Construct design: use a codon-modified SPP1 sequence with a small internal or C-terminal tag (HA, FLAG). The N-terminal signal peptide for secretion and the integrin-binding RGD motif must be preserved. • RGD-deleted rescue: deletion or mutation of the RGD motif abolishes integrin binding (αvβ3, αvβ5, others) and serves as the standard control for integrin-dependent functions. • Thrombin cleavage variants: thrombin cleavage of osteopontin generates fragments with distinct activities — cleavage-resistant variants enable studying intact versus fragment functions. • Functional readout: rescue should restore secreted osteopontin levels (measured by ELISA in conditioned medium) and downstream autocrine effects on RAW 264.7 biology. RAW 264.7 is a murine macrophage cell line — transduction with lentivirus or retrovirus works at moderate efficiency; consider spinoculation for primary or suspension-like batches.