IRAK4 Degraders for Treating Fibrotic Diseases and Beyond

Publication ID: 24-11857535_0002_PTD
Published: October 28, 2025
Category:New Applications & Use Cases

Legal Citation

pr1or.art Inc., “IRAK4 Degraders for Treating Fibrotic Diseases and Beyond,” Published Technical Disclosure No. 24-11857535_0002_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857535_0002_PTD
This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,535.

Summary of the Inventive Concept

This inventive concept expands the application of IRAK4 degraders beyond MYD88-mutant B-cell lymphomas to treat fibrotic diseases, prevent scarring, and address inflammatory bowel disease and dry eye disease, leveraging the unique profile of IRAKIMiD degraders.

Background and Problem Solved

The original patent disclosed the use of IRAK4 degraders for treating MYD88-mutant B-cell lymphomas. However, fibrotic diseases, such as idiopathic pulmonary fibrosis, remain a significant unmet medical need. Current treatments are limited, and there is a pressing need for novel therapeutic approaches. This inventive concept addresses this limitation by applying IRAK4 degraders to fibrotic diseases, capitalizing on their ability to selectively degrade IRAK4 protein and IMiD targets.

Detailed Description of the Inventive Concept

The new claims describe methods for treating fibrotic diseases, detecting fibrotic diseases, preventing scarring, treating inflammatory bowel disease, and treating dry eye disease using IRAK4 degraders. These degraders selectively degrade IRAK4 protein and IMiD targets, thereby reducing fibrosis, inflammation, and promoting tear production. The IRAKIMiD degraders' unique profile, combining IRAK4 degradation and immunomodulatory IMiD activity, enables their application in these new disease areas. The inventive concept encompasses various IRAK4 degraders, including Compound A, and their pharmaceutically acceptable salts.

Novelty and Inventive Step

The new claims introduce a novel application of IRAK4 degraders, moving beyond the original patent's focus on MYD88-mutant B-cell lymphomas. The inventive concept's novelty lies in the recognition of IRAK4 degraders' potential in treating fibrotic diseases and related conditions, which is not obvious from the original patent.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept could include the use of different IRAK4 degraders, varying dosing regimens, or combination therapies with other agents. Additionally, the inventive concept could be adapted for use in other disease areas where fibrosis or inflammation play a key role.

Potential Commercial Applications and Market

The inventive concept has significant commercial potential in the treatment of fibrotic diseases, inflammatory bowel disease, and dry eye disease, with a combined market size projected to exceed $10 billion by 2025. The ability to address these unmet medical needs with a novel therapeutic approach positions IRAK4 degraders as a promising solution for patients and healthcare providers.

Field of Art

Pharmaceutical biotechnology, specifically targeting protein degradation and inflammatory signaling pathways in disease treatment, with expertise in IRAK4 protein interactions and immunomodulatory drug design

Person of Ordinary Skill (PHOSITA) Profile

A skilled researcher with advanced degrees in molecular biology or pharmacology, understanding protein degradation mechanisms, inflammatory signaling pathways, and drug repurposing strategies, with experience in developing targeted therapeutic interventions

Obviousness Rationale

A PHOSITA would recognize that the unique mechanism of IRAK4 degraders targeting both protein degradation and immunomodulatory pathways provides a versatile therapeutic approach applicable beyond the original lymphoma context. The source patent's detailed characterization of IRAK4 degraders' mechanism inherently suggests potential broader applications in inflammatory and fibrotic conditions. The technical principles underlying the original invention naturally extend to treating related pathological processes involving inflammatory signaling.

Obvious Combinations & Variations

Source Patent Element
IRAK4 degraders targeting MYD88-mutant B-cell lymphomas
PTD Variation
Expanding application to fibrotic diseases and inflammatory conditions
Obviousness Reasoning
Predictable extension of known protein degradation mechanism to related inflammatory pathways, representing a logical therapeutic adaptation based on established molecular understanding
Source Patent Element
Compound A with specific dosing ranges (300-900 mg)
PTD Variation
Adapting dosing strategies for fibrotic disease and dry eye treatment
Obviousness Reasoning
Routine pharmacological optimization using known dosing principles, representing a standard design choice for translating therapeutic approaches across related indications
Source Patent Element
Targeting oncogenic MYD88 mutations
PTD Variation
Detecting and modulating IRAK4 protein in fibrotic disease diagnostic and treatment systems
Obviousness Reasoning
Applying established molecular targeting principles to develop diagnostic and therapeutic strategies in related disease contexts, representing a known technique of technological translation
Source Patent Element
IRAK4 degradation mechanism in lymphoma treatment
PTD Variation
Preventing scarring and treating inflammatory bowel disease
Obviousness Reasoning
Predictable application of protein degradation mechanism to modulate inflammatory processes, representing a foreseeable technological extension based on underlying molecular principles
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857535, a person having ordinary skill in the art would find the variations disclosed in the Published Technical Disclosure obvious, as the claimed methods represent a straightforward extrapolation of known IRAK4 degradation mechanisms to related inflammatory and fibrotic conditions. The technical variations constitute an obvious combination of prior art principles, demonstrating no inventive step beyond the routine application of established molecular targeting strategies.

Original Patent Information

Patent NumberUS 11,857,535
TitleMethods of treating mutant lymphomas
Assignee(s)Kymera Therapeutics, Inc.