PD-L1 Targeting Compounds for HBV and HDV Suppression

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Solution Overview

Problem

Current treatments for PD-L1 related diseases such as liver diseases, cancer, hepatocellular carcinoma, viral diseases, and hepatitis B are inadequate, with limited efficacy and tolerability, and there is a need for more effective therapies that target the PD-1/PD-L1 pathway to enhance immune response and inhibit viral replication.

Innovation Solution

Development of compounds that inhibit PD-1/PD-L1 interaction, including pharmaceutical compositions containing these compounds, to treat PD-L1 related diseases by administering them to subjects or contacting infected cells, thereby inhibiting HBV and HDV replication and enhancing immune response.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If current treatments for PD-L1 related diseases are used, then disease management is maintained, but efficacy and tolerability are limited

Engineering Contradiction:
ImproveefficacyVSAvoidlimited tolerability
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent employs parameter changes by modifying the chemical structure of PD-1/PD-L1 interaction inhibitors through various substituents (R1a-R4, Y1a-Y2b) to optimize both efficacy and tolerability. The compounds represent systematic variations in molecular parameters including ring structures, substituent positions, and chemical groups to achieve improved therapeutic profiles

Inventive Principle:
Principle #35Parameter changes

2Reliability

If PD-1/PD-L1 pathway targeting is enhanced to improve immune response, then antiviral efficacy is improved, but treatment complexity increases

Engineering Contradiction:
Improveimmune response efficacyVSAvoidtreatment mechanism complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts and isolates the specific PD-1/PD-L1 interaction mechanism as the primary therapeutic target, developing compounds that specifically inhibit this pathway. This focused approach on a single molecular interaction simplifies the treatment mechanism compared to broader immunomodulatory approaches while maintaining enhanced immune response efficacy

Inventive Principle:
Principle #2Taking out (Extraction)

3Productivity

If viral replication inhibition is strengthened, then disease progression is slowed, but off-target effects may increase

Engineering Contradiction:
Improveviral replication inhibition rateVSAvoidoff-target effects
Core Design Contradiction:
ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent uses the PD-1/PD-L1 interaction as an intermediary target to indirectly control viral replication. Rather than directly targeting viral replication machinery, the compounds mediate immune system activation through PD-1/PD-L1 inhibition, which then suppresses viral replication. This indirect approach reduces off-target effects compared to direct antiviral mechanisms

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS12428427B2Methods and compositions for targeting PD-L1
Publication Date: 2025.09.30 ALIGOS THERAPEUTICS INC
  • US12428427B2 patent drawing
  • US12428427B2 patent drawing
  • US12428427B2 patent drawing

AI summary

The present disclosure related to compounds that can be useful as inhibitors of PD-1, PD-L1 or the PD-1/PD-L1 interaction. Also disclosed herein are pharmaceutical compositions of that can include a compound of Formula (I), or a pharmaceutically acceptable salt thereof, and uses of or methods of using a compound of Formula (I), or a pharmaceutically acceptable salt thereof, for the treatment of PD-L1 related diseases including but not limited to liver diseases, cancer, hepatocellular carcinoma, viral diseases, or hepatitis B.