Adaptive SN-38 Formulations with Stimuli-Responsive Poly(amino acid) Block Copolymers

Publication ID: 24-11857630_0005_PTD
Published: October 28, 2025
Category:Future Evolutions & Paradigm Shifts

Legal Citation

pr1or.art Inc., “Adaptive SN-38 Formulations with Stimuli-Responsive Poly(amino acid) Block Copolymers,” Published Technical Disclosure No. 24-11857630_0005_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857630_0005_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. 11,857,630.

Summary of the Inventive Concept

Next-generation SN-38 formulations that utilize adaptive, stimuli-responsive poly(amino acid) block copolymers to dynamically modulate SN-38 release rates, pharmacokinetics, and efficacy in response to in vivo environmental changes, offering improved treatment outcomes and patient safety.

Background and Problem Solved

The original patent disclosed formulations of SN-38 with poly(amino acid) block copolymers, but these formulations had limitations in terms of their inability to adapt to changing in vivo conditions, leading to variable treatment outcomes. The new inventive concept addresses this limitation by introducing adaptive, stimuli-responsive poly(amino acid) block copolymers that can dynamically adjust SN-38 release rates and pharmacokinetics in response to changes in pH, temperature, or ionic strength.

Detailed Description of the Inventive Concept

The new inventive concept comprises a system of poly(amino acid) block copolymers with adaptive molecular weight, which can be adjusted in real-time in response to in vivo environmental changes. This adaptability enables the dynamic modulation of SN-38 release rates, allowing for more effective treatment of cancer and minimizing side effects. The poly(amino acid) block copolymers can also be designed to undergo conformational changes in response to changes in pH, temperature, or ionic strength, further enhancing their ability to adapt to in vivo conditions. Additionally, the inventive concept includes integrated diagnostic capabilities for real-time monitoring of SN-38 concentration and efficacy, enabling personalized treatment and improved patient outcomes.

Novelty and Inventive Step

The new claims introduce the concept of adaptive, stimuli-responsive poly(amino acid) block copolymers, which is a significant departure from the original patent's formulations. The use of machine learning algorithms and molecular dynamics simulations to optimize the design of these copolymers is also a novel aspect of the inventive concept. Furthermore, the integration of diagnostic capabilities and self-healing properties in the poly(amino acid) block copolymers is a non-obvious extension of the original patent's teachings.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept could include the use of different types of stimuli-responsive polymers, such as pH-responsive or temperature-responsive polymers. Additionally, the poly(amino acid) block copolymers could be designed to respond to different types of in vivo environmental changes, such as changes in oxygen levels or enzyme activity. The inventive concept could also be adapted for use with other types of therapeutic agents, such as proteins or nucleic acids.

Potential Commercial Applications and Market

The new inventive concept has significant commercial potential in the pharmaceutical industry, particularly in the areas of cancer treatment and personalized medicine. The ability to dynamically modulate SN-38 release rates and pharmacokinetics in response to in vivo environmental changes could lead to improved treatment outcomes and patient safety. The integrated diagnostic capabilities and self-healing properties of the poly(amino acid) block copolymers could also reduce healthcare costs and improve patient quality of life.

CPC Classifications

SectionClassGroup
A A61 A61K47/34
A A61 A61K9/08
A A61 A61K9/19
A A61 A61K31/4375
A A61 A61K31/513
A A61 A61K31/519
A A61 A61K45/06
A A61 A61K47/26

Field of Art

Pharmaceutical formulations, specifically polymer-based drug delivery systems for cancer therapeutics, with expertise in polymer chemistry, pharmacokinetics, and drug encapsulation technologies

Person of Ordinary Skill (PHOSITA) Profile

A researcher with advanced degrees in pharmaceutical sciences or chemical engineering, experienced in polymer synthesis, drug delivery system design, and understanding of stimuli-responsive materials for targeted drug delivery

Obviousness Rationale

A person having ordinary skill would recognize that extending the source patent's SN-38 and poly(amino acid) copolymer formulation to include adaptive and stimuli-responsive properties represents a predictable variation in drug delivery technology. The fundamental chemical principles of polymer design and drug encapsulation suggest that introducing responsive elements to control drug release is a logical progression in pharmaceutical formulation. The PTD's variations demonstrate incremental improvements that would be apparent to a skilled practitioner familiar with advanced drug delivery strategies.

Obvious Combinations & Variations

Source Patent Element
Composition of SN-38 with poly(amino acid) block copolymers
PTD Variation
Adaptive poly(amino acid) block copolymers with dynamic molecular weight adjustment
Obviousness Reasoning
Modifying polymer molecular weight is a standard technique in drug delivery to control release characteristics, representing a predictable design optimization known to those skilled in the art
Source Patent Element
Basic SN-38 formulation with copolymer
PTD Variation
Stimuli-responsive copolymers that change configuration based on pH, temperature, or ionic strength
Obviousness Reasoning
Developing responsive polymers for controlled drug release is a well-established approach in pharmaceutical engineering, representing an obvious extension of existing polymer design principles
Source Patent Element
Composition of SN-38 with copolymer
PTD Variation
Integrated diagnostic capabilities for real-time monitoring of drug concentration
Obviousness Reasoning
Incorporating sensing mechanisms into drug delivery systems is a known strategy for personalized medicine, representing a logical combination of existing technologies
Source Patent Element
Poly(amino acid) block copolymer formulation
PTD Variation
Machine learning and molecular dynamics simulation for polymer design optimization
Obviousness Reasoning
Utilizing computational methods to refine polymer characteristics is a standard approach in materials science, representing an obvious application of known computational techniques
Source Patent Element
Basic SN-38 drug delivery composition
PTD Variation
Self-healing polymer properties to minimize leakage during storage
Obviousness Reasoning
Developing improved material stability is a predictable engineering solution to known drug formulation challenges, representing an obvious improvement to existing technologies
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857630 and the published technical disclosure, a person having ordinary skill in the art would find the claimed variations of stimuli-responsive, adaptive poly(amino acid) block copolymer formulations for SN-38 delivery to be obvious and anticipated by the existing prior art. The incremental modifications represent predictable variations within the established technological framework of drug delivery system design, thereby rendering potential patent claims obvious under 35 U.S.C. Section 103.

Original Patent Information

Patent NumberUS 11,857,630
TitleFormulations of SN-38 with poly(amino acid) block polymers
Assignee(s)TYNDALL FORMULATION SERVICES, LLC