Enhanced PTH Compounds with Improved Pharmacokinetic Profiles

Publication ID: 24-11857603_0001_PTD
Published: October 28, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced PTH Compounds with Improved Pharmacokinetic Profiles,” Published Technical Disclosure No. 24-11857603_0001_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857603_0001_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. 11,857,603.

Summary of the Inventive Concept

The present inventive concept relates to novel PTH compounds and formulations exhibiting improved pharmacokinetic profiles, characterized by a peak-to-trough ratio of less than 3.5 within one injection interval, enabling more efficient and safer treatment of hypoparathyroidism.

Background and Problem Solved

The original patent disclosed PTH compounds with peak-to-trough ratios of less than 4, which, although an improvement, still exhibited limitations in terms of efficacy and administration frequency. The new inventive concept addresses these limitations by introducing conjugated PTH compounds, modified formulations, and optimized delivery systems, thereby providing enhanced therapeutic benefits and patient convenience.

Detailed Description of the Inventive Concept

The inventive concept encompasses PTH compounds conjugated to polyethylene glycol molecules, which reduce the peak-to-trough ratio to less than 3.5, allowing for longer administration intervals. Additionally, the concept includes formulations comprising excipients that enhance the stability of the PTH compound, as well as delivery systems utilizing needle-free injection devices or programmed subcutaneous injection devices. These innovations enable more efficient and safer treatment of hypoparathyroidism, reducing the burden on patients and healthcare systems.

Novelty and Inventive Step

The new claims introduce a significant improvement over the original patent by reducing the peak-to-trough ratio to less than 3.5, thereby providing a more stable and efficient therapeutic profile. The conjugation of PTH compounds to polyethylene glycol molecules and the use of optimized delivery systems constitute novel and non-obvious advancements in the field.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept may include varying the molecular weight of the polyethylene glycol molecule, using different excipients to enhance stability, or incorporating additional components to further improve the pharmacokinetic profile. Variations of the delivery system may include using different injection devices or programming the device to administer the formulation at varying intervals.

Potential Commercial Applications and Market

The enhanced PTH compounds and formulations have significant commercial potential in the treatment of hypoparathyroidism, offering improved efficacy, safety, and patient convenience. The target market includes pharmaceutical companies, hospitals, and clinics specializing in endocrinology and hormone therapy.

CPC Classifications

SectionClassGroup
A A61 A61K38/29
A A61 A61K9/00
A A61 A61K47/34
A A61 A61K47/60

Field of Art

Pharmaceutical biotechnology, specifically peptide-based therapeutic compounds for endocrine disorders, with expertise in pharmacokinetic formulation, drug delivery systems, and protein modification techniques

Person of Ordinary Skill (PHOSITA) Profile

A professional with advanced degrees in pharmaceutical sciences or biochemical engineering, experienced in protein chemistry, drug delivery optimization, and pharmacokinetic analysis, familiar with techniques like PEGylation and controlled-release formulations

Obviousness Rationale

A person skilled in the art would recognize that reducing the peak-to-trough ratio from less than 4 to less than 3.5 represents a predictable optimization of the existing PTH compound formulation. The use of PEGylation and advanced delivery systems are well-established strategies for improving pharmacokinetic profiles in peptide therapeutics. The technical modifications disclosed in the PTD represent incremental improvements that would be apparent to a skilled practitioner seeking to enhance the therapeutic performance of PTH compounds.

Obvious Combinations & Variations

Source Patent Element
Subcutaneous administration of PTH compound with peak-to-trough ratio less than 4
PTD Variation
PEGylation of PTH compound to reduce peak-to-trough ratio to less than 3.5
Obviousness Reasoning
PEGylation is a known technique for extending drug half-life and reducing pharmacokinetic variability, representing a predictable optimization strategy for peptide-based therapeutics
Source Patent Element
24-hour to one-week administration interval
PTD Variation
Extended administration interval to 48 hours using modified delivery system
Obviousness Reasoning
Extending drug delivery intervals is a standard approach in therapeutic optimization, achievable through well-understood formulation and delivery techniques
Source Patent Element
Subcutaneous injection of PTH compound
PTD Variation
Needle-free and programmable injection devices for PTH administration
Obviousness Reasoning
Advanced drug delivery technologies are routinely explored to improve patient compliance and treatment precision, representing an obvious technological progression
Source Patent Element
Basic PTH compound formulation
PTD Variation
Addition of stability-enhancing excipients to improve compound performance
Obviousness Reasoning
Formulation optimization through excipient selection is a standard pharmaceutical development practice with predictable outcomes
35 U.S.C. § 103 Summary: Pursuant to 35 U.S.C. ยง 103, the variations disclosed in this publication would have been obvious to a person having ordinary skill in the art at the time of invention, with a reasonable expectation of success, when viewed in light of US Patent 11857603. The incremental improvements in pharmacokinetic profile, delivery mechanism, and formulation represent predictable variations within the existing technological framework of PTH compound therapeutics.

Original Patent Information

Patent NumberUS 11,857,603
TitlePTH compounds with low peak-to-trough ratios
Assignee(s)ASCENDIS PHARMA BONE DISEASES A/S