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Immunology & Humanization

Single vs Double Humanized Targets

Single humanized models express one human gene of an interacting pair, while double humanized models replace both receptor and ligand to achieve full human-to-human signaling compatibility within the mouse system.

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Overview

Single humanized models express one human gene of an interacting pair (e.g., PD-1), while double humanized models replace both receptor and ligand (e.g., PD-1 and PD-L1) to achieve full human-to-human signaling compatibility within the mouse system.

Frequently Asked Questions

When is double humanization necessary?

Double humanization is needed when both molecules are species-specific and cross-reactivity between mouse and human versions is poor, providing a fully functional ligand–receptor axis.

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Related Terms

Humanized Immune Checkpoint (PD-1 / PD-L1 / CTLA-4)

Genetically engineered mice with key inhibitory immune receptors—such as PD-1, PD-L1, and CTLA-4—replaced with their human equivalents. Essential for evaluating antibody and biologic therapies targeting immune checkpoint pathways.

Humanized Mouse Models

A genetically engineered mouse in which one or more human genes, immune system components, or biological pathways have been introduced to replicate aspects of human physiology, bridging the gap between basic research and clinical translation.

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