Services

Autologous Antigen Antibody Production Service

Inquiry

An autologous antigen is one that already exists in the immunized animal, or a protein so conserved across species that the host treats it as its own. Because self-tolerance prevents the immune system from attacking what it regards as self, a direct immunization usually produces little or no response — and forcing one risks autoimmunity. The central problem of an autologous antigen project is therefore to break tolerance without tipping the host into attacking its own normal proteins.

We address this by immunizing an animal in which the target gene has been removed. With the endogenous protein absent, the immune system no longer reads the antigen as self, so a response can be raised safely; and because the protein can be reintroduced, the effect of immunization is visible at the level of the whole organism. This approach is especially useful for large studies where an organism-level readout of the antigen matters, though it is most established in a mouse model.

What the Service Covers

Conservation assessment – determining how self-like the antigen is in the intended host.
Knockout model design – planning a gene-removal host in which the antigen is no longer present.
Immunization of the knockout host – raising the response in the tolerant-broken animal.
Screening and validation – selecting antibodies and confirming they recognize the target.
Delivery with model data – supplying the antibody together with the host-model evidence.

Why Self-Tolerance Blocks the Response

Situation	Problem	Approach
Antigen present in the host	Immune system ignores it as self	Remove the gene so the host lacks the protein
Highly conserved across species	Host reads it as self	Use a knockout host rather than a foreign-species antigen
Forcing tolerance break	Risk of autoimmunity	Break tolerance only in the gene-absent model
Need for organism-level readout	Cell assays insufficient	Observe effect in the intact knockout animal

The Knockout-Host Strategy

Gene removal – the target gene is knocked out in the host animal, so the endogenous protein is absent.
Immunization without self-interference – the host now responds to the antigen it no longer makes for itself.
Clear readout – reintroducing the protein shows the immunization effect at the organism level.
Dual outcome – the project yields both the knockout model and the autologous immune antibody.

Workflow

Assess conservation – confirm the antigen is self-like in the host.
Build the knockout host – design and derive the gene-removed animal.
Immunize – raise the response in the tolerant-broken host.
Screen and purify – select and purify antigen-specific antibodies.
Deliver with evidence – supply the antibody and the model data.

Applications

Conserved protein antibodies – reagents against targets that are nearly identical across species.
Self-protein research – studying proteins the host normally tolerates.
Large-scale antigen studies – where an organism-level readout of immunization is informative.
Reference reagents – antibodies raised against a host's own protein for comparative work.

Why Work With Us

An autologous antigen cannot be treated as an ordinary immunization; the obstacle is tolerance, not production. We break that tolerance in a controlled way — by removing the gene from the host before immunization — so the antibody is raised safely and its effect can be seen in the intact animal. The project delivers both the reagent and the model evidence behind it.

The service is for research only, not for clinical use.