IL-6 Neutralizing Antibody CDR Engineering

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Solution Overview

Problem

Current therapies for conditions mediated by IL-6, such as rheumatoid arthritis and systemic lupus erythematosus, have limitations in effectively neutralizing IL-6 activity, leading to incomplete disease control and potential side effects.

Innovation Solution

Development of a high-affinity neutralizing antibody specific for human IL-6, comprising specific CDR sequences in its heavy and light chains, which can inhibit IL-6 activity by blocking its binding to the gp130 receptor, thereby reducing inflammatory responses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If current therapies for IL-6 mediated diseases are used, then treatment can be provided, but IL-6 activity is not effectively neutralized leading to incomplete disease control

Engineering Contradiction:
Improvedisease control effectivenessVSAvoidincomplete IL-6 neutralization
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies parameter changes by modifying the antibody structure to achieve high affinity binding to IL-6. The antibody molecules are engineered with specific complementarity determining regions (CDRs) that optimize binding parameters, resulting in effective neutralization of IL-6 activity and improved disease control in conditions like rheumatoid arthritis and systemic lupus erythematosus.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If current therapies are used, then treatment is provided, but side effects occur due to insufficient specific neutralization

Engineering Contradiction:
Improvetherapeutic efficacyVSAvoidtherapy side effects
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by designing antibodies with highly specific local binding characteristics to IL-6. The antibody molecules are engineered with precise CDR sequences that target specific epitopes on IL-6, enabling localized and specific neutralization of the cytokine's harmful effects while preserving other immune functions, thereby reducing therapy side effects.

Inventive Principle:
Principle #3Local quality

3Reliability

If high-affinity neutralizing antibody is developed, then IL-6 activity is effectively blocked, but manufacturing complexity increases

Engineering Contradiction:
ImproveIL-6 neutralization efficiencyVSAvoidantibody production complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies copying by using recombinant DNA technology to produce identical copies of the high-affinity antibody molecule. The antibody sequences are cloned into expression vectors and produced in mammalian cell lines, ensuring consistent high-affinity binding while streamlining manufacturing through standardized bioprocessing methods.

Inventive Principle:
Principle #26Copying

Data Source

PatentUS9631015B2Methods for treating IL-6 mediated diseases with antibody molecules specific for IL-6
Publication Date: 2017.04.25 R-PHARM INTERNATIONAL LLC
  • US9631015B2 patent drawing
  • US9631015B2 patent drawing
  • US9631015B2 patent drawing

AI summary

The invention relates to antibody molecules having specificity for antigenic determinants of IL-6, therapeutic uses of the antibody molecules and methods for producing said antibody molecules.