Mabqi

Conditionally active pH-sensitive therapeutic antibodies

Innovative therapeutic antibodies with unique pH-sensitive properties are emerging as a promising approach in oncology, offering enhanced specificity and reduced on-target off-tumor effects

These antibodies are designed to be active only in the acidic tumor microenvironment (TME) for improved efficacy and safety profiles.

Advantages and applications of pH-sensitive technology

pH-sensitive antibodies offer several significant advantages in therapeutic applications such as improvement of targeting and specificity, increased therapeutic efficacy and optimized pharmacokinetics properties:

  • Tumor selectivity and improved therapeutic index: exploits differences in pH between tumor (low-pH tumor microenvironment TME) and normal tissues
  • Reduced Off-tumor effects, minimizing binding to healthy tissues at physiological pH

 

These innovative antibodies represent a significant advancement in cancer therapeutics, offering the potential for more precise and effective treatments across multiple oncology indications.

pH-dependent antibody discovery

Backed by Mabqi proprietary know-how and 1st generation fully human synthetic naive antibody library, our innovation team developed a next-generation synthetic pH-sensitive pHuscI2TM library based on optimized paratopes.

This approach allows for:

  • Preferential binding to cancer antigens under acidic tumor microenvironment (TME) conditions
  • Reduced binding to normal tissues at physiological pH
  • Potential for improved safety profiles and reduced toxicity
Versatility in therapeutic antibody formats

The pH-sensitive antibody technology demonstrates remarkable adaptability to various pharmaceutical development formats:

Monoclonal Antibodies:
mAbs with pH-sensitive binding properties are developed to enhance a therapeutic efficacy and reduce side effects. This particular characteristic can be leveraged to precisely target cells in acidic microenvironments, such as tumors.

Antibody-Drug Conjugates (ADCs):
pH-sensitive antibodies can be incorporated into ADCs, potentially enhancing tumor-specific drug delivery and minimizing systemic toxicity.

Discovery of pH-sensitive antibodies –
Case study to generate conditionally active pH-sensitive to optimize therapeutic index