WEE1 Inhibitor Salt Forms for G2-M Checkpoint Disruption
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Solution Overview
Problem
Cancer cells often rely on the G2-M checkpoint for DNA repair due to a deficient G1-S checkpoint, and WEE1 kinase is overexpressed in various cancer types, providing a survival advantage by allowing time for DNA repair before mitosis, making it a critical target for cancer treatment.
Innovation Solution
Development of pharmaceutically acceptable salts and freebase forms of Compound A, including adipate, HCl, sulfate, mesylate, maleate, phosphate, tartrate, tosylate, mucate, and hippurate salts, as well as freebase forms A through J, to inhibit WEE1 kinase, disrupting the G2-M checkpoint and promoting cancer cell death.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If WEE1 kinase is inhibited to disrupt the G2-M checkpoint, then cancer cell death is promoted, but normal cells may also be affected due to their reliance on DNA repair mechanisms
Solution Approach 1:
The patent develops specific salt forms and crystal structures of WEE1 inhibitor compounds to optimize their pharmacological properties. Different salt forms (adipate, HCl, sulfate, mesylate, maleate, phosphate, tartrate, tosylate, mucate, and hippurate salts) and freebase forms (A through J) are created to achieve selective cancer cell targeting while minimizing normal cell damage through improved drug delivery and reduced off-target effects
2Ease of manufacture
If multiple salt forms and freebase forms are developed to optimize drug delivery, then pharmaceutical properties are improved, but the complexity of the invention increases
Solution Approach 1:
The patent creates multiple salt forms and freebase forms of the same core WEE1 inhibitor compound, where each form serves different pharmaceutical purposes (solubility, stability, bioavailability, manufacturing ease). This universal approach allows a single compound scaffold to be optimized for various delivery routes and patient needs without developing entirely separate molecules
Data Source
AI summary
The salt, such as adipate salt Form A, and freebase forms of Compound A are WEE1 inhibitors. Such salts and/or forms and freebase forms, as well as pharmaceutically acceptable salts and compositions thereof, are useful for treating diseases or conditions, including conditions characterized by excessive cellular proliferation, such as breast cancer.