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Foxp3 Conditional Knockout mouse — Foxp3-Cre pairing
Foxp3, the mouse ortholog of human FOXP3, encodes a forkhead-box transcription factor whose FKH DNA-binding domain, leucine zipper dimerization region, and N-terminal repressor module nucleate large complexes with Runx1/CBFβ, NFAT, Eos, and the NuRD and CoREST corepressors to enforce the regulatory T cell program, repressing Il2 while sustaining Il2ra, Ctla4, and Ikzf2. Lineage specification requires sustained TCR signaling plus demethylation of conserved noncoding sequence 2, which locks heritable expression; loss produces the scurfy phenotype, an X-linked fatal lymphoproliferative wasting syndrome in hemizygous males that mirrors human IPEX. Design decisions follow directly. Null and conditional alleles ask whether Treg identity is required in a given tissue or temporal window, Cre and reporter knockins (including inducible Foxp3-CreERT2 for fate mapping or diphtheria-toxin ablation) resolve lineage stability, and IPEX point-mutation or humanized alleles interrogate patient variants. No paralog substitutes for Foxp3, so deletion timing and driver fidelity, not redundancy, dominate interpretation.
Foxp3 conditional knockout mice carry a floxed allele so you delete function only where Cre is active. The germline allele stays intact until you cross to a tissue specific Cre. Labs reach for this design when a global knockout is lethal, when they need adult onset loss, or when regional redundancy hides a whole body phenotype. For regulatory T cell work, plan Cre specificity, reporter crosses, and baseline phenotyping before you scale.
Driver pairing
Foxp3-Cre biases toward regulatory T cell. Inducible: no.
Catalog options
Conditional knockout focuses the experiment on treg while the rest of the animal keeps a wild type allele. That pattern mirrors somatic mutation in patients and avoids systemic compensation that can erase subtle phenotypes. It is often preferred when a germline null is lethal, weak, or confounded by developmental rescue.
| Model | Type | Category | Availability | Catalog # | |
|---|---|---|---|---|---|
| Foxp3-Flox | CKO | CKO | IN PRODUCTION | CKO 261221 | Inquire |
| These mice carry loxP sites flanking exon 4-8 of Foxp3 gene. When crossed with a Cre recombinase-expressing strain, this strain is useful in eliminating tissue-specific conditional expression of Foxp3 gene. | |||||
Designing a Foxp3 Conditional Knockout allele
X linkage shapes everything. Hemizygous males carrying a floxed allele lose the gene completely once Cre acts, while heterozygous floxed females are mosaic through X inactivation and therefore supply an internal competition assay in which deleted and intact regulatory T cells coexist in one animal, a far more sensitive test of cell intrinsic requirement. Flank the exons encoding the forkhead domain so no DNA binding deficient protein persists to occupy partner complexes. Foxp3-CreERT2 gives timed, lineage restricted deletion, but the deleted cells survive as former regulatory effectors, so add a constitutive Rosa26 lineage tracer to separate loss of suppression from acquisition of pathogenic function. Cd4-Cre instead deletes before the lineage forms and models developmental failure. Endpoints are survival, dermatitis and blepharitis scoring, CD44 high CD62L low expansion, serum IgE, autoantibodies, and in vitro suppression assays.
Pricing and quotes
The Foxp3 Conditional Knockout lines listed above are catalog models. Send us the catalog number and our team confirms current availability, pricing, and whether the line ships cryopreserved or live.
If your study needs a Foxp3 allele configuration that is not listed above, our scientific team designs and generates it. Model generation quotes return in about twenty four hours with milestones for genotyping, QC, and dispatch.
FAQ
What Foxp3 Conditional Knockout mouse models are available?
When Foxp3 Conditional Knockout lines are in catalog, we ship from inventory. If your configuration is not listed, we design the allele to order. Common paths include conditional knockout, constitutive knockout, humanized, knockin, and transgenic options, with documented germline transmission and United States QC.
Is Foxp3 knockout embryonic lethal in mice?
It depends on background and allele design. Some Foxp3 germline knockouts are viable. Others need conditional alleles or mixed backgrounds. We review publications and our own experience, then recommend floxed versus null before you commit.
Which Cre driver is best for foxp3 cre focused experiments?
Driver choice depends on onset timing, recombination efficiency, and known leak. We map your organ and cell type to a short list of proven Cre lines, then talk through reporter crosses and controls. Your note points to foxp3 cre, so we start driver selection there.
Do you ship live Foxp3 animals?
When catalog lines are live, we ship with health certificates and QC documentation. If your exact combo is not listed, we quote a generation project with cryo or live dispatch depending on cohort timing and geography.
How do I request a quote for Foxp3?
Use the catalog inquire buttons or the request quote form. Include your allele goal, Cre plan if any, strain background, and cohort size. A PhD led team responds with pricing, milestones, and the fastest path to experimental animals.
Breed this line with ITL
Send the Foxp3 Conditional Knockout line to a U.S. barrier facility for colony maintenance, cohort production, and complex breeding schemes through mouse breeding services.