In the realm of immunological research, selecting the correct model system is paramount for experimental success. When working with DO11.10 mice, researchers often look for the specific chicken ovalbumin peptide that triggers a predictable response. Having spent significant time Immunization with mannosylated peptide induces poor T cell in the lab environment working with these models, I have found that understanding the precise alignment between the transgenic TCR and the provided antigen is the most critical step in experimental design.
The DO11.10 Model and Antigen Specificity
The DO11.10 TCR Tg mice are a cornerstone for those studying antigen presentation. These mice express an α/β T cell receptor that is specifically engineered to recognize the OVA peptide 323-339 sequence (ISQAVHAAHAEINEAGR) presented on the I-Ad MHC class II complex.
When I first began using these models, I learned quickly that the OVA 323-339 epitope is responsible for a substantial percentage of the T-cell response in BALB/c backgrounds. If you are preparing to react to ovalbumin (OVA) peptide antigen, it is essential to ensure your peptide purity is high, as the 339 amino acid residue and its flanking re Anti-Mouse TCR DO11.10 (clone KJ1.26) is an antibody that binds to the TCR specific for OVA323-339 presented in the context of I-A gions are critical for the binding affinity required for optimal stimulation.
Distinguishing Between OVA Epitopes
A co Figure 2: 1-A OVA 323-339 tetramer staining of splenocytes from peptide-immunized mice Anti-Mouse TCR DO11.10 (clone KJ1.26) is an antibody that binds mmon point of confusion for those new to the field is the d Defined Immune Response Tracking in Mice: OVA MHC ifference between class I and class II restricted peptides. While the DO11 model relies on the 323-339 sequence, other experiments involving CD11c dendritic cells often utilize the OVA 257-264 peptide, also known as SIINFEKL.
* SIINFEKL is one peptide sequence of the OVA protein that is the gold standard for H-2Kb-restricted OVA class I epitope research.
* OVA 257-264 is an OVA257-264 octapeptide frequently used to stimulate cells in assays where cytotoxic responses are being evaluated.
* OVA (329-337) is sometimes utilized in contexts involving OT-II mice, which share some similarities in their recognition patterns but operate within different MHC constraints.
Practical Considerations for Researchers
In my experience, whether you are using high-purity OVA (257-264) peptide or the classic OVA pe OVA peptides ptide (323-339), the delivery method matters. I have observed that OVA peptides can be delivered through various means, including simple incubation or more complex nano-encapsulation systems, to modulate how mice respond.
When setting up your study, remember:
1. Ovalbumin is a model antigen; it is not a therapeutic agent.
2. OVA can be used to probe the kinetics of antigen presentation, but the specific peptide must match the transgenic receptor of your mouse strain.
3. OVA323–339 peptide (OVAp) is the specific ligand for the DO11.10 TCR.
4. Consistently check the ovalbumin peptide OVA peptide mainly exists in egg white, it is a class I (Kb)-restricted peptide epitope of ovalbumin presented by the class I MHC (major histocompatibility sequence to ensure it matches your target receptors (e.g., I-Ad vs. H-2Kb).
Final Thoughts on Experimental Integrity
Working with peptide products requires strict attention to detail. Whether performing ELISPOT assays or investigating the behavior of CD11c-positive cells, the interaction between the OVA molecule and the TCR remains the defining variable. Always verify that your OVA 323-339 or OVA 257-264 stocks are free of contaminants, as even minor impurities can lead to inconsistent results in mouse models. By maintaining rigorous standards for these peptides, you ensure that your data remains robust and reproducible across all OVA-related experiments.