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Related Experiment Video

Updated: May 28, 2025

Targeted Antibody Blocking by a Dual-Functional Conjugate of Antigenic Peptide and Fc-III Mimetics DCAF

Targeted Antibody Blocking by a Dual-Functional Conjugate of Antigenic Peptide and Fc-III Mimetics DCAF

Published on: September 17, 2019

Combinatorial Fc modifications for complementary antibody functionality.

Yannic C Bartsch^1,2, Nicholas E Webb¹, Eleanor Burgess¹

¹Ragon Institute of Mass General, MIT, and Harvard, Cambridge, Massachusetts, USA.

|February 14, 2025

Summary

This summary is machine-generated.

Combining engineered Fc variants of therapeutic monoclonal antibodies (mAbs) can enhance function. Strategic selection of complementary Fc modifications, especially with distinct antibody specificities, broadens functional activity.

Keywords:

Broadly functional antibodies Fc-modifications complimentary combinations

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Published on: February 5, 2021

Area of Science:

Immunology and biotechnology
Protein engineering and antibody therapeutics

Background:

Therapeutic monoclonal antibodies (mAbs) are crucial biologics.
Fc engineering offers a method to enhance mAb effector functions.
Combining engineered mAbs could lead to synergistic therapeutic benefits.

Purpose of the Study:

To investigate the functional complementarity of paired mAbs with different Fc modifications.
To assess the impact of Fc engineering on mAb activity in HIV-1 antibody libraries.
To determine if combining Fc variants can enhance functional breadth and activity.

Main Methods:

Utilized two HIV-1 monoclonal antibody (mAb) libraries.
Each library contained 60 distinct engineered Fc variants.
Evaluated in vitro activity of mAb pairs with various Fc modifications.

Main Results:

Fc engineering impact is dependent on the specific antibody (Fab) clone.
Combinations of Fc variants from distinct Fabs showed greater functional enhancement than those with the same Fab specificity.
Some Fc variant combinations yielded additive effects, while others were detrimental, indicating unpredictable outcomes.

Conclusions:

Complementary Fc modifications in mAb combinations show potential for enhanced functional activity and breadth.
Strategic pairing of Fc variants, particularly with different specificities, is key.
Further research is needed to optimize Fc modifications for in vivo efficacy.