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Bispecific Antibody Drug Discovery Services

Bispecific and Multispecific Antibody Discovery Through Rational Design, Engineering, and Optimization

WuXi Biologics CRO Services provides one-stop bispecific antibody drug discovery services spanning format design, pair screening, early developability assessment, functional characterization, and premium-purity bsAb production, supporting diverse bispecific and multispecific programs with fit-for-purpose strategies toward CMC development.

CORE STRENGTH

Bispecific Antibody Drug Discovery Service Highlights​:

Expert Design to Optimization

From rational format design & selection and pair screening to lead optimization

Diverse Format Expertise

Fit-for-purpose strategies across a wide range of bispecifics and multispecifics

Early Risk Mitigation

Early developability and functional data to support lead optimization and reduce downstream risks

LC-MS Assisted BsAb Production​

HTP to gram-level with >98% heterodimer and low endotoxin for screening, testing and downstream studies​


~11,000

BsAbs produced annually

~14,000

Molecules tested by LC-MS annually

~200

BsAbs advanced to CMC
End-to-End Support

End-to-End Support for Bispecific and Multispecific Antibody Projects​

With deep expertise in bsAb discovery, our one-stop discovery workflow supports target biology analysis, format design & selection, engineering, early developability assessment, and mechanism-driven functional evaluation. Throughout the project, dedicated scientists with drug development experience provide end-to-end technical support, enabling efficient progression from concept to well-characterized preclinical candidates with reduced risk.

01

Bispecific Antibody Discovery

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  • Target biology assessment and MOA alignment to guide discovery strategy
  • Biology-guided platform selection based on modality, target, and therapeutic goals
  • Humanization, affinity maturation, and Fc engineering to optimize binding, developability, and function
02

Format Design & Selection

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  • Case-specific strategies like TCE design & engineering to improve efficacy and reduce risks
  • Format selection based on affinity, avidity, epitope, and geometry
  • Assessment of PK, efficacy, safety, manufacturability, and production complexity
03

Pair Screening

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  • HTP production of diverse bsAb formats, yielding 1-7 mg in 3-4 weeks​
  • Tagless four-chain bsAb production for ADC conjugation and in vitro / in vivo studies​
  • Binding & cell-based assays to identify optimal pairs
04

Early Developability Assessment for Lead Optimization

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  • HTP, low material in vitro assays for early-stage antibody developability assessment
  • Fit-for-purpose panels assessing sequence liability, PK, biophysical stability, and manufacturability
  • Data-driven insights to reduce downstream risks and support confident lead optimization
05

Early Function Assessment for Lead Optimization

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  • MOA-driven in vitro assay design across biochemical, cellular, immune, and Fc effector functions
  • T-cell killing/activation and cytokine release assays for TCE characterization
  • NHP PK/PD/Tox study support in 6–11 weeks without scheduling delays
06

Production Support Throughout the Workflow

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  • LC-MS guided bsAb purification achieving >98% heterodimer purity across diverse formats
  • HTP to gram-scale bsAb production with <0.1 EU/mg endotoxin, supporting pair screening through in vivo studies
  • Parental antibody production to accelerate early discovery
Case Studies

Case Studies: Supporting Bispecific Antibody Drug Discovery from Design to Lead Optimization​

TCR Affinity Maturation & TCR-TCE Production with Functional Characterization

This case study shows that affinity maturation improved TCR binding affinity by ~10,000-fold via HTP SPR koff ranking, followed by transient CHO production of the TCR-TCE, achieving high titer and high purity. The one-stop workflow supports rapid generation of potent building blocks for TCR-TCE discovery.

TCR Affinity Maturation & TCR-TCE Production

Eliminating Precipitation Through Structure-Guided Bispecific Antibody Engineering & Developability Assessment
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This case study shows how early developability assessment helped identify key risks in a bispecific antibody. Initial testing revealed aggregation and precipitation issues. After structure-guided sequence optimization, the improved bsAb showed higher thermal stability while maintaining binding and biological activity.

Eliminating Precipitation Through Structure-Guided Bispecific Antibody Engineering

Anti-HSA VHH Enabling Half-Life Extension for Bispecific T-Cell Engager in Mouse PK Studies
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This case study evaluates integration of an anti-HSA VHH molecule into a bispecific T-cell engager, extending exposure in a mouse model. ELISA measurements showed extended half-life comparable to a benchmark bsAb. The workflow provides a practical framework for BiTE discovery with improved PK performance.

Anti-HSA VHH Enabling Half-Life Extension for Bispecific T-Cell Engager

Why WuXi Biologics

Why Work with WuXi Biologics for Bispecific Antibody Discovery

  • Biology-Driven Discovery: MOA-guided support for bispecific and multispecific antibody discovery
  • Expert Strategies & Input: From rational format design and pair screening to lead optimization
  • Early Developability & Function Assessment: Generate actionable data to guide optimization and reduce downstream risks
  • LC-MS Assisted BsAb Production: Reliable HTP to gram-scale material generation with >98% heterodimer and <0.1 EU/mg endotoxin

Get Started

Advance Your Next Bispecific Discovery Program with Confidence

From early discovery strategy to lead optimization support, our team works closely with clients to design fit-for-purpose workflows aligned with their biology, modality, and development goals. Contact us to discuss your bispecific or multispecific antibody project and see how WuXi Biologics can help accelerate your path to the next milestone.