{"title":"A patent review of xanthine oxidase inhibitors (2021-present).","authors":"Chang Liu, Qing Mao, Bing Zhang, Xuefeng Fu, Tingjian Zhang, Shaojie Wang","doi":"10.1080/13543776.2024.2446222","DOIUrl":"10.1080/13543776.2024.2446222","url":null,"abstract":"<p><strong>Introduction: </strong>Xanthine oxidase (XO) catalyzes the oxidation of both hypoxanthine and xanthine in the last two steps of the purine metabolic pathway, serving as a rate-limiting enzyme for uric acid production as well as a key target for the treatment of gout and other hyperuricemia-related conditions.</p><p><strong>Areas covered: </strong>This paper reviews XO inhibitors in patents from 2021 to the present. We summarize in detail the structural classes and characteristics, in vitro and in vivo biological results, and structure‒activity relationships of synthetic inhibitors, as well as the sources, specific structures, research methods, and biological activities of XO inhibitors from natural products.</p><p><strong>Expert opinion: </strong>(1) Benefiting from the discovery of many high-affinity inhibitors, the binding modes of small molecules in the active pocket of XO have been further elucidated, and this information will contribute to future development; (2) natural products remain one of the important sources in the discovery of XO inhibitors; (3) with a deeper exploration of XO and URAT1 targets, XO/URAT1 dual target inhibitors may be a future research hotspot; and (4) the search for high-affinity, small-molecule scaffolds remains a key challenge and an important direction for the future development.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"79-89"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142893203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lukas Gorecki, Eva Reznickova, Vladimir Krystof, Martina Rezacova, Martina Ceckova, Jan Korabecny
{"title":"Strategies for the treatment of acute myeloid leukemia with FLT3 mutations: a patent review.","authors":"Lukas Gorecki, Eva Reznickova, Vladimir Krystof, Martina Rezacova, Martina Ceckova, Jan Korabecny","doi":"10.1080/13543776.2024.2446224","DOIUrl":"10.1080/13543776.2024.2446224","url":null,"abstract":"<p><strong>Introduction: </strong>Approximately one-third of all AML patients have a mutation in the <i>Fms-like tyrosine kinase 3</i> (<i>FLT3</i>) gene, which is associated with a poor prognosis in these individuals. The 2017 approval of midostaurin, the first FLT3 inhibitor, spurred extensive development of more potent and selective inhibitors with an improved safety profile.</p><p><strong>Areas covered: </strong>This review analyzes patent inventions for the treatment of AML using FLT3 inhibitors, covering developments from the earliest to the most recent, disclosed in 2024. Our search using the global Espacenet database identified numerous compounds with low nanomolar inhibitory concentrations against FLT3-ITD and FLT3-TKD mutants. These compounds have shown promise in preclinical studies. Co-inhibition strategies and combinatorial therapies to overcome resistance and enhance anti-leukemic efficacy are also discussed.</p><p><strong>Expert opinion: </strong>Recent patents highlight advances in the field of FLT3 inhibitors with a focus on overcoming resistance, improving selectivity and potency. Future strategies may include third-generation inhibitors such as type III allosteric inhibitors, irreversible inhibitors, or PROTACs. Personalized medicine approaches utilizing genetic profiling to tailor therapies are emphasized. Exploration of novel combination regimens with emerging therapies like CAR T-cell therapy, immune checkpoint inhibitors, and small molecules targeting critical AML pathways is ongoing to further enhance anti-leukemic efficacy.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"137-164"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142881469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuhui Gao, Li Lan, Cheng Wang, Yuwei Wang, Lei Shi, Liping Sun
{"title":"Selective JAK1 inhibitors and the therapeutic applications thereof: a patent review (2016-2023).","authors":"Yuhui Gao, Li Lan, Cheng Wang, Yuwei Wang, Lei Shi, Liping Sun","doi":"10.1080/13543776.2024.2446223","DOIUrl":"10.1080/13543776.2024.2446223","url":null,"abstract":"<p><strong>Introduction: </strong>The family of Janus kinases (JAKs) consists of four intracellular non-receptor tyrosine kinases: JAK1, JAK2, JAK3, and tyrosine kinase 2 (TYK2). Among these four subtypes, JAK1 is the only isoform that can form heterodimers with all three JAKs, and JAK1 dysfunction can lead to inflammation and severe autoimmune diseases. Interest in JAK1 inhibitors has grown tremendously, and the number of inhibitors targeting JAK1 continues to rise annually.</p><p><strong>Areas covered: </strong>This paper reviews JAK1 small molecule inhibitors that were reported in patent literature from January 2016 to December 2023. Web of Science, SciFinder, PubMed, WIPO, EPO, USPTO, and CNIPA databases were used for searching the literature and patents for JAK1 inhibitors.</p><p><strong>Expert opinion: </strong>JAK1 inhibitors show great promise in treating cytokine dysregulated disorders; nevertheless, nonselective JAK1 inhibitors have more severe side effects, which restricts the therapy's safety and use. Therefore, developing highly selective JAK1 inhibitors can mitigate potential risks and lead to next-generation therapies with improved efficacy and safety profiles.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"181-195"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142881254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yan A Ivanenkov, Alexander S Malyshev, Victor A Terentiev, Anastasia A Korzhenevskaya, Sergei A Evteev, Sergey Z Vatsadze, Aleksei V Medved'ko, Petr V Shegai, Andrey D Kaprin
{"title":"Small molecule ATM inhibitors as potential cancer therapy: a patent review (2003-present).","authors":"Yan A Ivanenkov, Alexander S Malyshev, Victor A Terentiev, Anastasia A Korzhenevskaya, Sergei A Evteev, Sergey Z Vatsadze, Aleksei V Medved'ko, Petr V Shegai, Andrey D Kaprin","doi":"10.1080/13543776.2024.2446228","DOIUrl":"10.1080/13543776.2024.2446228","url":null,"abstract":"<p><strong>Introduction: </strong>The ataxia telangiectasia mutated kinase (ATM) is key in coordinating the DDR signaling network essential for responding to double-strand breaks (DSBs). Several ATM inhibitors are being investigated for potential anticancer treatment in clinical trials.</p><p><strong>Areas covered: </strong>This review aims to provide a comprehensive overview of patents and patent applications since 2003, with a particular focus on the structural properties, activity and efficacy of the claimed ATM kinase small-molecule inhibitors. The search was conducted using SciFinder, Cortellis Drug Discovery Intelligence Database, and Espacenet. After filtering, 44 records were identified for further analysis. This paper also discusses the recent progress in the clinical trials and development history.</p><p><strong>Expert opinion: </strong>ATM kinase is a promising target for cancer therapy. Small-molecule ATM kinase inhibitors hold significant potential in cancer treatment by enhancing the efficacy of existing DNA-damaging therapies. Patent analysis revealed that the majority of these compounds contain imidazo[4,5-c]quinolinone scaffold or its bioisosteric variations which are optimal in terms of good ATM inhibitory activity and selectivity over closely related enzymes. Clinical trials explore combinations with RT or DNA-targeted compounds like PARP inhibitors, which induce DSBs. The medicinal chemistry field anticipates that these therapeutic options will soon be available on the pharmaceutical market.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"111-136"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142893208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Histamine H<sub>3</sub> receptor antagonists/inverse agonists: a patent review (October 2017 - December 2023) documenting progress.","authors":"Dorota Łażewska, Katarzyna Kieć-Kononowicz","doi":"10.1080/13543776.2024.2446227","DOIUrl":"https://doi.org/10.1080/13543776.2024.2446227","url":null,"abstract":"<p><strong>Introduction: </strong>Histamine H<sub>3</sub> receptor antagonists/inverse agonists, since the discovery of histamine H<sub>3</sub> receptor (H<sub>3</sub>R), are important ligands in the search for new potential drugs. The most interesting are CNS diseases as these receptors are mainly there present.</p><p><strong>Areas covered: </strong>The current review covers patent applications/patents that were published during the last 6 years (October 2017 - December 2023). Documents were found in two free available patent databases: Espacenet and PatentScope and divided into three basic categories such as methods, compounds, and therapeutic indications. It provides an overview of 51 patent applications/patents. Many pharmaceutical compositions with H<sub>3</sub>R antagonists/inverse agonists have been claimed. Furthermore, PubMed, Scopus, and ClinicalTrials databases were searched for literature to prepare this review.</p><p><strong>Expert opinion: </strong>Interest in the H<sub>3</sub>R field is still high and has remained almost unchanged over the last 10 years in the number of publications, but the type of publications has changed (fewer new ligands, more pharmacological studies). Currently, the search for new H<sub>3</sub>R ligands is focused on multi-target compounds. The first crystal structure of H<sub>3</sub>R with a ligand appeared. New therapeutic indications, such as autism, fatigue, and Prader-Willi syndrome, are verified in clinical trials.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"1-25"},"PeriodicalIF":5.4,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142931106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Urease inhibitors for the treatment of <i>H. pylori</i>.","authors":"Özlen Güzel-Akdemir, Atilla Akdemir","doi":"10.1080/13543776.2024.2423004","DOIUrl":"10.1080/13543776.2024.2423004","url":null,"abstract":"<p><strong>Introduction: </strong><i>Helicobacter pylori</i> infects almost half of the World population. Although many infected people are symptom free, the microorganism can still cause a variety of gastrointestinal disorders and gastric adenocarcinoma. It is considered a priority pathogen for the development of new antibiotics by the World Health Organisation (WHO). Many virulence factors of <i>H. pylori</i> have been described. This paper will on <i>H. pylori</i> Urease (HPU).</p><p><strong>Area covered: </strong>This paper will discuss the (patho)physiology and structure of HPU. In addition, urease inhibitors with known activity against the HPU or inhibitors that show <i>H. pylori</i> growth inhibition will be discussed.</p><p><strong>Expert opinion: </strong>Increase in selectivity, affinity and potency of HPU inhibitors can be achieved by the design of compounds that interact with distinct regions within the enzyme active site. Especially, covalent interactions seem promising as they clearly effect the dose requirement of the drug candidate.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"17-30"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142567297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Riccardo Fusco, Zeinab Saedi, Imma Capriello, Andriy Lubskyy, Alexander Dömling
{"title":"CBL-B - An upcoming immune-oncology target.","authors":"Riccardo Fusco, Zeinab Saedi, Imma Capriello, Andriy Lubskyy, Alexander Dömling","doi":"10.1080/13543776.2024.2412567","DOIUrl":"10.1080/13543776.2024.2412567","url":null,"abstract":"<p><strong>Introduction: </strong>The E3 ubiquitin ligase Cbl-b is a novel target in immune-oncology, with critical roles in regulating T-cell activation and signaling pathways. By facilitating the ubiquitination and degradation of key signaling proteins, Cbl-b modulates immune responses, maintaining immune homeostasis and preventing unwarranted T-cell proliferation. The therapeutic potential of Cbl-b as a cancer immunotherapy target is underscored by its contribution to an immunosuppressive tumor microenvironment, with efforts currently underway to develop small-molecule inhibitors.</p><p><strong>Areas covered: </strong>We reviewed the small molecules, and antibody-drug conjugates targeting Cbl-b from 2018 to 2024. The patents were gathered through publicly available databases and analyzed with in-house developed cheminformatic workflow, described within the manuscript.</p><p><strong>Expert opinion: </strong>Targeting Cbl-b presents a promising approach in immuno-oncology, offering a novel pathway to potentiate the immune system's ability to combat cancer beyond PDL1/PD1 inhibition. The development and clinical advancement of Cbl-b inhibitors, as evidenced by the ongoing trials, mark a significant step toward harnessing this target for therapeutic benefits. Overall, the strategic inhibition of Cbl-b holds substantial promise for improving cancer immunotherapy outcomes, heralding a new era in the fight against cancer.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"47-64"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142709494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A patent review of UNC-51-like kinase 1/2 inhibitors (2019-present).","authors":"Zhiqi Zhang, Dejuan Sun, Yueying Yang, Samir Y Abbas, Hua Li, Lixia Chen","doi":"10.1080/13543776.2024.2423010","DOIUrl":"10.1080/13543776.2024.2423010","url":null,"abstract":"<p><strong>Introduction: </strong>UNC-51-like kinase 1/2 (ULK1/2) are serine/threonine kinases that play a crucial role in autophagy activation and maintaining cellular homeostasis. Given their broad physiological relevance, ULK1/2 are candidate targets for treating various diseases. In recent years, ULK1/2 inhibitors have made significant progress, and the highly potent ULK1/2 inhibitors have entered clinical trials.</p><p><strong>Area covered: </strong>This review aims to provide an updated analysis of patents describing ULK1/2 inhibitors and their potential therapeutic applications that were disclosed between 2019 and 2024.</p><p><strong>Expert opinion: </strong>Due to their crucial role in various diseases, the invention of small-molecule drugs targeting ULK1/2 is particularly important, especially in cancer treatment. Despite the great success of ULK1/2 inhibitors development, ULK1/2 inhibitors are ATP competitive inhibitors of aminopyrimidines currently, and most ULK1/2 inhibitors are still in the preclinical research stage, with only DCC-3116 entered clinical research. Therefore, developing highly selective ULK1/2 inhibitors with low side effects and high bioavailability remains a challenging and promising research direction.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"7-16"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142521507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"WD repeat domain 5 (WDR5) inhibitors: a patent review (2016-present).","authors":"Jesse A Coker, Shaun R Stauffer","doi":"10.1080/13543776.2024.2441658","DOIUrl":"10.1080/13543776.2024.2441658","url":null,"abstract":"<p><strong>Introduction: </strong>WDR5 is an epigenetic scaffolding protein that has attracted significant interest as an anti-cancer drug target, especially in MLL-rearranged leukemias. The most druggable 'WIN-site' on WDR5, which tethers WDR5 to chromatin, has been successfully targeted with multiple classes of exquisitely potent small-molecule protein-protein interaction inhibitors. Earlier progress has also been made on the development of WDR5 degraders and inhibitors at the 'WBM-site' on the opposite face of WDR5.</p><p><strong>Areas covered: </strong>Based on an international survey of the patent literature using SciFinder from 2016-2024, herein we provide a comprehensive account of the chemical matter targeting WDR5, with a particular focus on proprietary compounds that are underreported in the existing academic literature. Our survey illuminates challenges for the field to overcome: a broad lack of chemical diversity, confusion about the molecular mechanism of WIN-site inhibitors, a paucity of brain-penetrant scaffolds despite emerging evidence of activity in brain cancers, sparse pharmacokinetic, metabolic, and disposition characterization, and the absence of safety or efficacy data in humans.</p><p><strong>Expert opinion: </strong>It is our opinion that the best-in-class WIN-site inhibitors (from the imidazole class) merit advancement into clinical testing, likely against leukemia, which should provide much-needed clarity about the exciting but unproven potential of WDR5 as a next-generation therapeutic target.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"31-45"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142871906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Menin-MLL protein-protein interaction inhibitors: a patent review (2021-present).","authors":"Fang Wang, Zhe Yang, Yujie Wu, Huanrong Bai, Minhang Xin","doi":"10.1080/13543776.2024.2422380","DOIUrl":"10.1080/13543776.2024.2422380","url":null,"abstract":"<p><strong>Introduction: </strong>Acute leukemia harboring rearrangement of the Mixed lineage leukemia (MLL) and/or mutation of the nucleophosmin is a type of poorly prognostic and highly malignant leukemia which is extremely difficult to treat. Blocking the protein-protein interaction between Menin and MLL is a strategic approach for treating leukemias, as a new direction for drug discovery. Many biotech and pharmaceutical companies made great efforts to this drug development field, and a large number of small molecular Menin-MLL PPI inhibitors were reported during the recent three years.</p><p><strong>Areas covered: </strong>This review is to mainly summarize the Menin-MLL PPI inhibitors reported in the recent three years' patents.</p><p><strong>Expert opinion: </strong>Although the past 12 years have witnessed the progress of the Menin-MLL PPI inhibitors in the treatment of acute leukemia, especially for leukemia harboring rearranged KMT2A and/or mutated NPM1, recent studies showed Menin-MLL PPI inhibitors suffered from new issues such as toxicity, acquired resistance, and homogenization. Therefore, new drug discovery strategies should be considered in advance. The expert opinion was proposed from several aspects, such as developing diverse chemical structures, discovering covalent inhibitors, designing small molecular PROTACs, and targeting the amino acids mutations for next-generation inhibitors.</p>","PeriodicalId":12314,"journal":{"name":"Expert Opinion on Therapeutic Patents","volume":" ","pages":"65-78"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}