Targeted Therapies for Neurodegenerative and Infectious Diseases using Hydrophobic Auristatin F Compounds

Publication ID: 24-11857565_0002_PTD
Published: October 28, 2025
Category:New Applications & Use Cases

Legal Citation

pr1or.art Inc., “Targeted Therapies for Neurodegenerative and Infectious Diseases using Hydrophobic Auristatin F Compounds,” Published Technical Disclosure No. 24-11857565_0002_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857565_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. 11,857,565.

Summary of the Inventive Concept

The present inventive concept relates to the application of hydrophobic Auristatin F compounds to novel therapeutic areas, including neurodegenerative and infectious diseases, by conjugating these compounds to targeting moieties specific to disease-associated antigens.

Background and Problem Solved

Traditional antibody-auristatin drug conjugates have limitations in treating certain diseases, such as neurodegenerative and infectious diseases, due to their inability to effectively target and penetrate affected tissues. The original patent disclosed hydrophobic Auristatin F compounds and conjugates with activity against MDR+ cancer cells. However, these compounds were not explored for their potential in treating other diseases. The present inventive concept addresses this limitation by applying the core technology of the original patent to new therapeutic areas.

Detailed Description of the Inventive Concept

The inventive concept involves conjugating hydrophobic Auristatin F compounds to targeting moieties specific to disease-associated antigens in neurodegenerative and infectious diseases. These conjugates enable targeted delivery of the Auristatin F compound to affected tissues, enhancing efficacy and reducing off-target effects. The conjugates can be formulated for various administration routes, including ocular administration for retinal degenerative diseases. The inventive concept encompasses a range of diseases, including neurodegenerative diseases, such as Alzheimer's and Parkinson's, and infectious diseases, such as bacterial and viral infections.

Novelty and Inventive Step

The novelty of the present inventive concept lies in the application of hydrophobic Auristatin F compounds to novel therapeutic areas, including neurodegenerative and infectious diseases, and the use of targeting moieties specific to disease-associated antigens. This inventive step is non-obvious, as the original patent did not disclose or suggest the use of these compounds in these therapeutic areas.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept include the use of different targeting moieties, such as antibodies, peptides, or small molecules, and varying the linker chemistry to optimize conjugate stability and efficacy. Additionally, the inventive concept can be adapted for use in other diseases, such as cardiovascular diseases, by selecting targeting moieties specific to disease-associated antigens.

Potential Commercial Applications and Market

The present inventive concept has significant commercial potential in the treatment of neurodegenerative and infectious diseases, which are major unmet medical needs. The market for targeted therapies in these areas is substantial, with potential applications in both human and veterinary medicine.

Field of Art

Pharmaceutical chemistry, specifically drug conjugate design and targeted therapeutic development, with expertise in antibody-drug conjugates, linker chemistry, and targeted delivery systems for cancer and disease treatments

Person of Ordinary Skill (PHOSITA) Profile

A skilled researcher with advanced degrees in pharmaceutical chemistry or chemical biology, understanding drug conjugation techniques, antigen targeting strategies, and molecular design principles for therapeutic compounds

Obviousness Rationale

A person of ordinary skill would recognize that the source patent's hydrophobic Auristatin F compounds provide a versatile platform for targeted therapeutic interventions. The PTD's extension of these compounds to neurodegenerative and infectious disease contexts represents a predictable application of known drug conjugation strategies. The core technical principles of ligand-drug conjugation established in the source patent can be readily adapted to alternative disease targets using standard molecular engineering techniques.

Obvious Combinations & Variations

Source Patent Element
Ligand-drug conjugate with specific drug-linker moiety targeting cancer cells
PTD Variation
Adapting the same conjugate strategy to target neurodegenerative disease-associated antigens
Obviousness Reasoning
Predictable extension of existing targeting methodology to a related therapeutic domain with known molecular targeting principles
Source Patent Element
Hydrophobic Auristatin F compound with modular linker chemistry
PTD Variation
Modifying linker to enable targeted delivery to neuroinflammation sites
Obviousness Reasoning
Known technique of adjusting linker chemistry to optimize drug conjugate performance across different biological contexts
Source Patent Element
Antibody-drug conjugate targeting specific cellular antigens
PTD Variation
Using similar conjugation approach for infectious disease-associated antigens
Obviousness Reasoning
Finite set of known molecular targeting strategies that can be systematically applied across different disease models
Source Patent Element
Cancer cell-targeted drug conjugate with bystander activity
PTD Variation
Extending conjugate design to enable targeted delivery in neurodegenerative and infectious disease contexts
Obviousness Reasoning
Logical progression of existing drug conjugation technology to address broader therapeutic challenges
Source Patent Element
Compound with specific structural modifications for enhanced cellular penetration
PTD Variation
Adapting structural design for ocular and neurological administration routes
Obviousness Reasoning
Predictable engineering approach using known molecular design principles to optimize drug delivery across different biological barriers
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857565 and the published technical disclosure, a person of ordinary skill in the art would find the claimed variations in therapeutic targeting and disease applications of hydrophobic Auristatin F compounds to be obvious extensions of the prior art. The systematic adaptation of established drug conjugation strategies to alternative disease contexts represents a predictable application of known molecular engineering principles, thereby rendering such variations obvious under 35 U.S.C. Section 103.

Original Patent Information

Patent NumberUS 11,857,565
TitleHydrophobic Auristatin F compounds and conjugates thereof
Assignee(s)Seagen Inc.