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Ramos MC, Crespo-Sueiro G, de Pedro N, Griñán-Lisón C, Díaz C, Pérez-Victoria I, González-Menéndez V, Castillo F, Pérez Del Palacio J, Tormo JR, Choquesillo-Lazarte D, Marchal JA, Vicente F, Fernández-Godino R, Genilloud O, Reyes F. Onychocolone A produced by the fungus Onychocola sp. targets cancer stem cells and stops pancreatic cancer progression by inhibiting MEK2-dependent cell signaling. Biomed Pharmacother 2024; 177:117018. [PMID: 38908208 DOI: 10.1016/j.biopha.2024.117018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 06/10/2024] [Accepted: 06/18/2024] [Indexed: 06/24/2024] Open
Abstract
Pancreatic cancer (PC) shows a high fatality rate that can only be faced with a combination of surgery and chemotherapy or palliative treatment in the case of advanced patients. Besides, PC tumors are enriched with subpopulations of cancer stem cells (CSCs) that are resistant to the existing chemotherapeutic agents, which raises an important need for the identification of new drugs. To fill this gap, we have tested the anti-tumoral activity of microbial extracts, which chemical diversity offers a broad spectrum of potential new bioactive compounds. Extracts derived from the fungus Onychocola sp. CF-107644 were assayed via high throughput screening followed by bioassay-guided fractionation and resulted in the identification and isolation of six benzophenone derivatives with antitumoral activity: onychocolones A-F (#1-6). The structures of the compounds were established by spectroscopic methods, including ESI-TOF MS, 1D and 2D NMR analyses and X-ray diffraction. Compounds #1-4 significantly inhibited the growth of the pancreas tumoral cell lines, with low-micromolar Median Effective Doses (ED50s). Compound #1 (onychocolone A) was prioritized for further profiling due to its pro-apoptotic effect, which was further validated on 3D spheroids and pancreatic CSCs. Protein expression assays showed that the effect was mechanistically linked to the inhibition of MEK onco-signaling pathway. The efficacy of onychocolone A was also demonstrated in vivo by the reduction of tumor growth in a pancreatic xenograft mouse model generated by CSCs. Altogether, the data support that onychocolone A is a promising new small molecule for hit-to-lead development of a new treatment for PC.
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Affiliation(s)
- Maria C Ramos
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain.
| | - Gloria Crespo-Sueiro
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Nuria de Pedro
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Carmen Griñán-Lisón
- Instituto de Investigación Biosanitaria ibs.GRANADA, University Hospitals of Granada-University of Granada, Granada 18100, Spain; GENYO, Centre for Genomics and Oncological Research, Pfizer/University of Granada/Andalusian Regional Government, Granada 18016, Spain; Department of Biochemistry and Molecular Biology 2, Faculty of Pharmacy, University of Granada, Campus de Cartuja s/n, Granada 18071, Spain
| | - Caridad Díaz
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Ignacio Pérez-Victoria
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Víctor González-Menéndez
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Francisco Castillo
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Jose Pérez Del Palacio
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Jose R Tormo
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos, IACT, CSIC, University of Granada, Avenida de las Palmeras 4, Armilla, Granada 18100, Spain
| | - Juan A Marchal
- Instituto de Investigación Biosanitaria ibs.GRANADA, University Hospitals of Granada-University of Granada, Granada 18100, Spain; Excellence Research Unit "Modeling Nature" (MNat), University of Granada, Granada 18016, Spain; Department of Human Anatomy and Embryology, Faculty of Medicine, University of Granada, Granada 18016, Spain
| | - Francisca Vicente
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Rosario Fernández-Godino
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Olga Genilloud
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain
| | - Fernando Reyes
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Parque Tecnológico Ciencias de la Salud, Avda. del Conocimiento 34, Armilla, Granada 18016, Spain.
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Zhou X, Xue F, Li T, Xue J, Yue S, Zhao S, Lu H, He C. Exploration of potential biomarkers for early bladder cancer based on urine proteomics. Front Oncol 2024; 14:1309842. [PMID: 38410113 PMCID: PMC10894981 DOI: 10.3389/fonc.2024.1309842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 01/29/2024] [Indexed: 02/28/2024] Open
Abstract
Background Bladder cancer is a common malignant tumor of the urinary system. The progression of the condition is associated with a poor prognosis, so it is necessary to identify new biomarkers to improve the diagnostic rate of bladder cancer. Methods In this study, 338 urine samples (144 bladder cancer, 123 healthy control, 32 cystitis, and 39 upper urinary tract cancer samples) were collected, among which 238 samples (discovery group) were analyzed by LC-MS. The urinary proteome characteristics of each group were compared with those of bladder cancer, and the differential proteins were defined by bioinformatics analysis. The pathways and functional enrichments were annotated. The selected proteins with the highest AUC score were used to construct a diagnostic panel. One hundred samples (validation group) were used to test the effect of the panel by ELISA. Results Compared with the healthy control, cystitis and upper urinary tract cancer samples, the number of differential proteins in the bladder cancer samples was 325, 158 and 473, respectively. The differentially expressed proteins were mainly related to lipid metabolism and iron metabolism and were involved in the proliferation, metabolism and necrosis of bladder cancer cells. The AUC of the panel of APOL1 and ITIH3 was 0.96 in the discovery group. ELISA detection showed an AUC of 0.92 in the validation group. Conclusion This study showed that urinary proteins can reflect the pathophysiological changes in bladder cancer and that important molecules can be used as biomarkers for bladder cancer screening. These findings will benefit the application of the urine proteome in clinical research.
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Affiliation(s)
- Xu Zhou
- Department of Laboratory Medicine, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Fei Xue
- Department of Laboratory Medicine, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Tingmiao Li
- Department of Laboratory Medicine, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Jiangshan Xue
- Department of Laboratory Medicine, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Siqi Yue
- Department of Laboratory Medicine, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Shujie Zhao
- Department of Laboratory Medicine, Changchun Infectious Diseases Hospital, Changchun, China
| | - Hezhen Lu
- Department of Laboratory Medicine, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Chengyan He
- Department of Laboratory Medicine, China-Japan Union Hospital of Jilin University, Changchun, China
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Roskoski R. Properties of FDA-approved small molecule protein kinase inhibitors: A 2024 update. Pharmacol Res 2024; 200:107059. [PMID: 38216005 DOI: 10.1016/j.phrs.2024.107059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 01/14/2024]
Abstract
Owing to the dysregulation of protein kinase activity in many diseases including cancer, this enzyme family has become one of the most important drug targets in the 21st century. There are 80 FDA-approved therapeutic agents that target about two dozen different protein kinases and seven of these drugs were approved in 2023. Of the approved drugs, thirteen target protein-serine/threonine protein kinases, four are directed against dual specificity protein kinases (MEK1/2), twenty block nonreceptor protein-tyrosine kinases, and 43 inhibit receptor protein-tyrosine kinases. The data indicate that 69 of these drugs are prescribed for the treatment of neoplasms. Six drugs (abrocitinib, baricitinib, deucravacitinib, ritlecitinib, tofacitinib, upadacitinib) are used for the treatment of inflammatory diseases (atopic dermatitis, rheumatoid arthritis, psoriasis, alopecia areata, and ulcerative colitis). Of the 80 approved drugs, nearly two dozen are used in the treatment of multiple diseases. The following seven drugs received FDA approval in 2023: capivasertib (HER2-positive breast cancer), fruquintinib (metastatic colorectal cancer), momelotinib (myelofibrosis), pirtobrutinib (mantle cell lymphoma, chronic lymphocytic leukemia, small lymphocytic lymphoma), quizartinib (Flt3-mutant acute myelogenous leukemia), repotrectinib (ROS1-positive lung cancer), and ritlecitinib (alopecia areata). All of the FDA-approved drugs are orally effective with the exception of netarsudil, temsirolimus, and trilaciclib. This review summarizes the physicochemical properties of all 80 FDA-approved small molecule protein kinase inhibitors including the molecular weight, number of hydrogen bond donors/acceptors, polar surface area, potency, solubility, lipophilic efficiency, and ligand efficiency.
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Affiliation(s)
- Robert Roskoski
- Blue Ridge Institute for Medical Research, 221 Haywood Knolls Drive, Hendersonville, NC 28791, United States.
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Stites EC. The Abundance of KRAS and RAS Gene Mutations in Cancer. Methods Mol Biol 2024; 2797:13-22. [PMID: 38570449 DOI: 10.1007/978-1-0716-3822-4_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Mutant forms of the RAS genes KRAS, NRAS, and HRAS are important and common drivers of cancer. Recently, two independent teams that integrated cancer genomics with cancer epidemiology estimated that approximately 15-20% of all human cancers harbor a mutation in one of these three RAS genes. These groups also estimate KRAS mutations occur in 11-14% of all human cancers. Although these estimates are lower than many commonly encountered values, these estimates continue to rank KRAS and the ensemble of RAS oncogenes among the most common genetic drivers of cancer across all forms of malignancy.
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Affiliation(s)
- Edward C Stites
- Department of Laboratory Medicine and Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA.
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Liu S, Wang K, Zhao Z, Pang Y, Liu F, Wang P, Wang Z, Yang X. miR-451a suppresses the proliferation and migration of high-grade serous ovarian cancer by targeting RAB5A through the Ras/Raf/MEK/ERK pathway. J Gene Med 2024; 26:e3649. [PMID: 38282155 DOI: 10.1002/jgm.3649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 10/20/2023] [Accepted: 11/17/2023] [Indexed: 01/30/2024] Open
Abstract
BACKGROUND Ovarian cancer is one of the most common cancers in women. Profiles changes of microRNAs (miRNAs) are closely linked to malignant tumors. In the present study, we investigated expression of miR-451a in high-grade serous ovarian cancer (HGSOC). We also investigated the potential pathological roles and the likely mechanism of miR-451a in the development of HGSOC using animal models and cell lines. METHODS Using bioinformatics techniques and a real-time PCR, we analyzed differently expressed miRNAs in HGSOC compared to normal tissue. MTT (i.e. 3-[4, 5-dimethyl thiazol-2-yl]-2,5-diphenyl tetrazolium bromide), EDU (i.e. 5-ethynyl-2'-deoxyuridine) and transwell assays were performed to investigate the effect of miR-451a on the proliferation and migration of HGSOC SKOV-3 cells. A dual luciferase reporter assay was performed to verify the targeting relationship of miR-451 and RAB5A (one of the Rab GTPase proteins that regulates endocytosis and vesicle transport). Also, we analyzed levels of the RAB5A mRNA and protein by real-time PCR, western blotting and immunohistochemistry assays in HGSOC cells and tissues. Finally, we performed in vivo experiments using HGSOC mice. RESULTS miR-451a was substantially upregulated in HGSOC and associated with favorable clinical characteristics. miR-451a knockdown significantly increased growth and metastasis of HGSOC cell line SKOV-3 through Ras/Raf/mitogen-activated protein kinase kinase (MEK)/extracellular signal-regulated kinase (ERK) signaling. In addition, RAB5A, an early endosome marker, was shown to be a direct target of miR-451a. Moreover, RAB5A is correlated with unfavorable clinical features and shows independent prognostic significance in HGSOC. CONCLUSIONS We found that the miR-451a/RAB5A axis is associated with tumorigenesis and progression through the Ras/Raf/MEK/ERK pathway, providing prognostic indicators and therapeutic targets for patients with HGSOC.
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Affiliation(s)
- Shujie Liu
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Kun Wang
- Department of Gynecology, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, China
| | - Zhendan Zhao
- Department of Ultrasound Medcine, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, China
| | - Yu Pang
- Department of Pathology, The Afliated Taian City Central Hospital of Qingdao University, Tai'an, China
| | - Fang Liu
- Department of Gastroenterology, The Afliated Taian City Central Hospital of Qingdao University, Tai'an, China
| | - Pengling Wang
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Zhiling Wang
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Xingsheng Yang
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan, Shandong, China
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Roskoski R. Small molecule protein kinase inhibitors approved by regulatory agencies outside of the United States. Pharmacol Res 2023; 194:106847. [PMID: 37454916 DOI: 10.1016/j.phrs.2023.106847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023]
Abstract
Owing to genetic alterations and overexpression, the dysregulation of protein kinases plays a significant role in the pathogenesis of many autoimmune and neoplastic disorders and protein kinase antagonists have become an important drug target. Although the efficacy of imatinib in the treatment of chronic myelogenous leukemia in the United States in 2001 was the main driver of protein kinase inhibitor drug discovery, this was preceded by the approval of fasudil (a ROCK antagonist) in Japan in 1995 for the treatment of cerebral vasospasm. There are 21 small molecule protein kinase inhibitors that are approved in China, Japan, Europe, and South Korea that are not approved in the United Sates and 75 FDA-approved inhibitors in the United States. Of the 21 agents, eleven target receptor protein-tyrosine kinases, eight inhibit nonreceptor protein-tyrosine kinases, and two block protein-serine/threonine kinases. All 21 drugs are orally bioavailable or topically effective. Of the non-FDA approved drugs, sixteen are prescribed for the treatment of neoplastic diseases, three are directed toward inflammatory disorders, one is used for glaucoma, and fasudil is used in the management of vasospasm. The leading targets of kinase inhibitors approved by both international regulatory agencies and by the FDA are members of the EGFR family, the VEGFR family, and the JAK family. One-third of the 21 internationally approved drugs are not compliant with Lipinski's rule of five for orally bioavailable drugs. The rule of five relies on four parameters including molecular weight, number of hydrogen bond donors and acceptors, and the Log of the partition coefficient.
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Affiliation(s)
- Robert Roskoski
- Blue Ridge Institute for Medical Research, 221 Haywood Knolls Drive, Hendersonville, NC 28791-8717, United States.
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Roskoski R. Rule of five violations among the FDA-approved small molecule protein kinase inhibitors. Pharmacol Res 2023; 191:106774. [PMID: 37075870 DOI: 10.1016/j.phrs.2023.106774] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 04/16/2023] [Indexed: 04/21/2023]
Abstract
Because genetic alterations including mutations, overexpression, translocations, and dysregulation of protein kinases are involved in the pathogenesis of many illnesses, this enzyme family is the target of many drug discovery programs in the pharmaceutical industry. Overall, the US FDA has approved 74 small molecule protein kinase inhibitors, nearly all of which are orally effective. Of the 74 approved drugs, forty block receptor protein-tyrosine kinases, eighteen target nonreceptor protein-tyrosine kinases, twelve are directed against protein-serine/threonine protein kinases, and four target dual specificity protein kinases. The data indicate that 63 of these medicinals are approved for the management of neoplasms (51 against solid tumors such as breast, colon, and lung cancers, eight against nonsolid tumors such as leukemia, and four against both types of tumors). Seven of the FDA-approved kinase inhibitors form covalent bonds with their target enzymes and they are accordingly classified as TCIs (targeted covalent inhibitors). Medicinal chemists have examined the physicochemical properties of drugs that are orally effective. Lipinski's rule of five (Ro5) is a computational procedure that is used to estimate solubility, membrane permeability, and pharmacological effectiveness in the drug-discovery setting. It relies on four parameters including molecular weight, number of hydrogen bond donors and acceptors, and the Log of the partition coefficient. Other important descriptors include the lipophilic efficiency, the polar surface area, and the number of rotatable bonds and aromatic rings. We tabulated these and other properties of the FDA-approved kinase inhibitors. Of the 74 approved drugs, 30 fail to comply with the rule of five.
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Affiliation(s)
- Robert Roskoski
- Blue Ridge Institute for Medical Research, 221 Haywood Knolls Drive, Hendersonville, NC 28791-8717, United States.
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Bo L, Wang Y, Li Y, Wurpel JND, Huang Z, Chen ZS. The Battlefield of Chemotherapy in Pediatric Cancers. Cancers (Basel) 2023; 15:cancers15071963. [PMID: 37046624 PMCID: PMC10093214 DOI: 10.3390/cancers15071963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/12/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023] Open
Abstract
The survival rate for pediatric cancers has remarkably improved in recent years. Conventional chemotherapy plays a crucial role in treating pediatric cancers, especially in low- and middle-income countries where access to advanced treatments may be limited. The Food and Drug Administration (FDA) approved chemotherapy drugs that can be used in children have expanded, but patients still face numerous side effects from the treatment. In addition, multidrug resistance (MDR) continues to pose a major challenge in improving the survival rates for a significant number of patients. This review focuses on the severe side effects of pediatric chemotherapy, including doxorubicin-induced cardiotoxicity (DIC) and vincristine-induced peripheral neuropathy (VIPN). We also delve into the mechanisms of MDR in chemotherapy to the improve survival and reduce the toxicity of treatment. Additionally, the review focuses on various drug transporters found in common types of pediatric tumors, which could offer different therapeutic options.
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Affiliation(s)
- Letao Bo
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John’s University, Queens, NY 11439, USA
| | - Youyou Wang
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John’s University, Queens, NY 11439, USA
| | - Yidong Li
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John’s University, Queens, NY 11439, USA
| | - John N. D. Wurpel
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John’s University, Queens, NY 11439, USA
| | - Zoufang Huang
- Ganzhou Key Laboratory of Hematology, Department of Hematology, The First Affiliated Hospital of Gannan Medical University, Ganzhou 341000, China
- Correspondence: (Z.H.); (Z.-S.C.); Tel.: +86-138-797-27439 (Z.H.); +1-718-990-1432 (Z.-S.C.); Fax: +1-718-990-1877 (Z.-S.C.)
| | - Zhe-Sheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John’s University, Queens, NY 11439, USA
- Institute for Biotechnology, St. John’s University, Queens, NY 11439, USA
- Correspondence: (Z.H.); (Z.-S.C.); Tel.: +86-138-797-27439 (Z.H.); +1-718-990-1432 (Z.-S.C.); Fax: +1-718-990-1877 (Z.-S.C.)
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Roskoski R. Futibatinib (Lytgobi) for cholangiocarcinoma. Trends Pharmacol Sci 2023; 44:190-191. [PMID: 36702680 DOI: 10.1016/j.tips.2022.12.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/22/2022] [Accepted: 12/31/2022] [Indexed: 01/26/2023]
Affiliation(s)
- Robert Roskoski
- Blue Ridge Institute for Medical Research, 3754 Brevard Road, Ste 106, Horse Shoe, NC, 28742, USA.
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10
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Properties of FDA-approved small molecule protein kinase inhibitors: A 2023 update. Pharmacol Res 2023; 187:106552. [PMID: 36403719 DOI: 10.1016/j.phrs.2022.106552] [Citation(s) in RCA: 103] [Impact Index Per Article: 103.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 11/08/2022] [Indexed: 11/18/2022]
Abstract
Owing to the dysregulation of protein kinase activity in many diseases including cancer, this enzyme family has become one of the most important drug targets in the 21st century. There are 72 FDA-approved therapeutic agents that target about two dozen different protein kinases and three of these drugs were approved in 2022. Of the approved drugs, twelve target protein-serine/threonine protein kinases, four are directed against dual specificity protein kinases (MEK1/2), sixteen block nonreceptor protein-tyrosine kinases, and 40 target receptor protein-tyrosine kinases. The data indicate that 62 of these drugs are prescribed for the treatment of neoplasms (57 against solid tumors including breast, lung, and colon, ten against nonsolid tumors such as leukemia, and four against both solid and nonsolid tumors: acalabrutinib, ibrutinib, imatinib, and midostaurin). Four drugs (abrocitinib, baricitinib, tofacitinib, upadacitinib) are used for the treatment of inflammatory diseases (atopic dermatitis, psoriatic arthritis, rheumatoid arthritis, Crohn disease, and ulcerative colitis). Of the 72 approved drugs, eighteen are used in the treatment of multiple diseases. The following three drugs received FDA approval in 2022 for the treatment of these specified diseases: abrocitinib (atopic dermatitis), futibatinib (cholangiocarcinomas), pacritinib (myelofibrosis). All of the FDA-approved drugs are orally effective with the exception of netarsudil, temsirolimus, and trilaciclib. This review summarizes the physicochemical properties of all 72 FDA-approved small molecule protein kinase inhibitors including lipophilic efficiency and ligand efficiency.
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Pang K, Wang W, Qin J, Shi Z, Hao L, Ma Y, Xu H, Wu Z, Pan D, Chen Z, Han C. Role of protein phosphorylation in cell signaling, disease, and the intervention therapy. MedComm (Beijing) 2022; 3:e175. [DOI: 10.1002/mco2.175] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 08/18/2022] [Accepted: 08/22/2022] [Indexed: 11/06/2022] Open
Affiliation(s)
- Kun Pang
- Department of Urology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical College The Affiliated Xuzhou Hospital of Medical College of Southeast University The Affiliated Xuzhou Center Hospital of Nanjing University of Chinese Medicine Xuzhou Jiangsu China
| | - Wei Wang
- Department of Medical College Southeast University Nanjing Jiangsu China
| | - Jia‐Xin Qin
- Department of Urology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical College The Affiliated Xuzhou Hospital of Medical College of Southeast University The Affiliated Xuzhou Center Hospital of Nanjing University of Chinese Medicine Xuzhou Jiangsu China
| | - Zhen‐Duo Shi
- Department of Urology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical College The Affiliated Xuzhou Hospital of Medical College of Southeast University The Affiliated Xuzhou Center Hospital of Nanjing University of Chinese Medicine Xuzhou Jiangsu China
| | - Lin Hao
- Department of Urology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical College The Affiliated Xuzhou Hospital of Medical College of Southeast University The Affiliated Xuzhou Center Hospital of Nanjing University of Chinese Medicine Xuzhou Jiangsu China
| | - Yu‐Yang Ma
- Graduate School Bengbu Medical College Bengbu Anhui China
| | - Hao Xu
- Graduate School Bengbu Medical College Bengbu Anhui China
| | - Zhuo‐Xun Wu
- Department of Pharmaceutical Sciences College of Pharmacy and Health Sciences St. John's University, Queens New York New York USA
| | - Deng Pan
- Graduate School Bengbu Medical College Bengbu Anhui China
| | - Zhe‐Sheng Chen
- Department of Pharmaceutical Sciences College of Pharmacy and Health Sciences St. John's University, Queens New York New York USA
| | - Cong‐Hui Han
- Department of Urology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical College The Affiliated Xuzhou Hospital of Medical College of Southeast University The Affiliated Xuzhou Center Hospital of Nanjing University of Chinese Medicine Xuzhou Jiangsu China
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Suzuki T, Masugi Y, Inoue Y, Hamada T, Tanaka M, Takamatsu M, Arita J, Kato T, Kawaguchi Y, Kunita A, Nakai Y, Nakano Y, Ono Y, Sasahira N, Takeda T, Tateishi K, Uemura S, Koike K, Ushiku T, Takeuchi K, Sakamoto M, Hasegawa K, Kitago M, Takahashi Y, Fujishiro M. KRAS variant allele frequency, but not mutation positivity, associates with survival of patients with pancreatic cancer. Cancer Sci 2022; 113:3097-3109. [PMID: 35567350 PMCID: PMC9459293 DOI: 10.1111/cas.15398] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 04/13/2022] [Accepted: 04/30/2022] [Indexed: 11/27/2022] Open
Abstract
KRAS mutation is a major driver of pancreatic carcinogenesis and will likely be a therapeutic target. Due to lack of sensitive assays for clinical samples of pancreatic cancer with low cellularity, KRAS mutations and their prognostic association have not been fully examined in large populations. In a multi-institutional cohort of 1162 pancreatic cancer patients with formalin-fixed paraffin-embedded tumor samples, we undertook droplet digital PCR (ddPCR) for KRAS codons 12/13/61. We examined detection rates of KRAS mutations by clinicopathological parameters and survival associations of KRAS mutation status. Multivariable hazard ratios (HRs) and 95% confidence intervals (CIs) for disease-free survival (DFS) and overall survival (OS) were computed using the Cox regression model with adjustment for potential confounders. KRAS mutations were detected in 1139 (98%) patients. The detection rate did not differ by age of tissue blocks, tumor cellularity, or receipt of neoadjuvant chemotherapy. KRAS mutations were not associated with DFS or OS (multivariable HR comparing KRAS-mutant to KRAS-wild-type tumors, 1.04 [95% CI, 0.62-1.75] and 1.05 [95% CI, 0.60-1.84], respectively). Among KRAS-mutant tumors, KRAS variant allele frequency (VAF) was inversely associated with DFS and OS with HRs per 20% VAF increase of 1.27 (95% CI, 1.13-1.42; ptrend <0.001) and 1.31 (95% CI, 1.16-1.48; ptrend <0.001), respectively. In summary, ddPCR detected KRAS mutations in clinical specimens of pancreatic cancer with high sensitivity irrespective of parameters potentially affecting mutation detections. KRAS VAF, but not mutation positivity, was associated with survival of pancreatic cancer patients.
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Affiliation(s)
- Tatsunori Suzuki
- Department of Gastroenterology, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Yohei Masugi
- Department of PathologyKeio University School of MedicineTokyoJapan
| | - Yosuke Inoue
- Department of Hepatobiliary and Pancreatic SurgeryThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Tsuyoshi Hamada
- Department of Gastroenterology, Graduate School of MedicineThe University of TokyoTokyoJapan
- Department of Hepato‐Biliary‐Pancreatic MedicineThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Mariko Tanaka
- Department of Pathology, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Manabu Takamatsu
- Division of PathologyThe Cancer Institute of Japanese Foundation for Cancer ResearchTokyoJapan
- Department of PathologyThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Junichi Arita
- Hepato‐Biliary‐Pancreatic Surgery Division, Department of Surgery, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Tomotaka Kato
- Department of Hepatobiliary and Pancreatic SurgeryThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Yoshikuni Kawaguchi
- Hepato‐Biliary‐Pancreatic Surgery Division, Department of Surgery, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Akiko Kunita
- Next‐Generation Precision Medicine Development Laboratory, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Yousuke Nakai
- Department of Gastroenterology, Graduate School of MedicineThe University of TokyoTokyoJapan
- Department of Endoscopy and Endoscopic SurgeryThe University of Tokyo HospitalTokyoJapan
| | - Yutaka Nakano
- Department of SurgeryKeio University School of MedicineTokyoJapan
| | - Yoshihiro Ono
- Department of Hepatobiliary and Pancreatic SurgeryThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Naoki Sasahira
- Department of Hepato‐Biliary‐Pancreatic MedicineThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Tsuyoshi Takeda
- Department of Hepato‐Biliary‐Pancreatic MedicineThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Keisuke Tateishi
- Department of Gastroenterology, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Sho Uemura
- Department of SurgeryKeio University School of MedicineTokyoJapan
| | - Kazuhiko Koike
- Department of Gastroenterology, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Tetsuo Ushiku
- Department of Pathology, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Kengo Takeuchi
- Division of PathologyThe Cancer Institute of Japanese Foundation for Cancer ResearchTokyoJapan
- Department of PathologyThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Michiie Sakamoto
- Department of PathologyKeio University School of MedicineTokyoJapan
| | - Kiyoshi Hasegawa
- Hepato‐Biliary‐Pancreatic Surgery Division, Department of Surgery, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Minoru Kitago
- Department of SurgeryKeio University School of MedicineTokyoJapan
| | - Yu Takahashi
- Department of Hepatobiliary and Pancreatic SurgeryThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Mitsuhiro Fujishiro
- Department of Gastroenterology, Graduate School of MedicineThe University of TokyoTokyoJapan
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The structural basis of BCR-ABL recruitment of GRB2 in chronic myelogenous leukemia. Biophys J 2022; 121:2251-2265. [PMID: 35651316 DOI: 10.1016/j.bpj.2022.05.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 04/24/2022] [Accepted: 05/20/2022] [Indexed: 11/21/2022] Open
Abstract
BCR-ABL drives chronic myeloid leukemia (CML). BCR binding to GRB2 transduces signaling via the Ras/MAPK pathway. Despite considerable data confirming the binding, molecular-level understanding of exactly how the two proteins interact, and especially, what are the determinants of the specificity of the SH2GRB2 domain-pBCR recognition are still open questions. Yet, this is vastly important for understanding binding selectivity, and for predicting the phosphorylated receptors, or peptides, that are likely to bind. Here, we uncover these determinants and ascertain to what extent they relate to the affinity of the interaction. Toward this end, we modeled the complexes of the phosphorylated BCR (pBCR) and SH2GRB2 and other pY/Y-peptide-SH2 complexes and compared their specificity and affinity. We observed that pBCR's 176FpYVNV180 motif is favorable and specific to SH2GRB2, similar to pEGFR, but not other complexes. SH2GRB2 contains two binding pockets: pY-binding recognition pocket triggers binding, and the specificity pocket whose interaction is governed by N179 in pBCR and W121 in SH2GRB2. Our proposed motif with optimal affinity to SH2GRB2 is E/D-pY-E/V-N-I/L. Collectively, we provide the structural basis of BCR-ABL recruitment of GRB2, outline its specificity hallmarks, and delineate a blueprint for prediction of BCR-binding scaffolds and for therapeutic peptide design.
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HRAS Q61L Mutation as a Possible Target for Non-Small Cell Lung Cancer: Case Series and Review of Literature. Curr Oncol 2022; 29:3748-3758. [PMID: 35621690 PMCID: PMC9139372 DOI: 10.3390/curroncol29050300] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 12/13/2022] Open
Abstract
Introduction: Assessment of actionable gene mutations and oncogene fusions have made a paradigm shift in treatment strategies of non-small cell lung cancer (NSCLC). HRAS mutations involved around 0.2–0.8% of NSCLC patients, mostly on codon 61. For these patients, few data are available regarding clinical characteristics and response to therapies. Methods: Next-Generation Sequencing (NGS) done routinely at Nantes University Hospital was used to identify HRAS molecular alterations in NSCLC patients. We identified and described four HRAS p.GlnQ61Leu mutated patients. Literature of previously HRAS-mutant NSCLC cases was reviewed, and available data in solid tumour with the most advanced H-Ras specific inhibitor, tipifarnib, were presented. Results: Of 1614 patients diagnosed with advanced NSCLC from January 2018 to December 2020, four (0.25%) had HRAS p.Gln61Leu mutation. Three of them died during the first-line systemic therapy. Furthermore, three additional cases were identified in literature. All cases were current or former smokers, most of them had pleural or pericardial effusion at diagnosis. Conclusions: The clinical course of patients with HRAS-mutant NSCLC remains unclear. Furthers cases should be identified in order to clarify prognosis and response to therapies. Tipifarnib, a farnesyl transferase inhibitor, is a promising candidate to target HRAS-mutant tumours and should be explored in NSCLC patients.
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Combination of Tipifarnib and Sunitinib Overcomes Renal Cell Carcinoma Resistance to Tyrosine Kinase Inhibitors via Tumor-Derived Exosome and T Cell Modulation. Cancers (Basel) 2022; 14:cancers14040903. [PMID: 35205655 PMCID: PMC8870174 DOI: 10.3390/cancers14040903] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/08/2022] [Accepted: 02/09/2022] [Indexed: 12/04/2022] Open
Abstract
Simple Summary Metastatic renal cell carcinoma continues to have a poor prognosis. Chemotherapies and immuno-oncologic therapies have garnered increasing importance in cancer therapy, with improvements in patient care and survival. However, a large proportion of patients present with tumors resistant to these treatments. Exosomes are small extracellular vesicles secreted by all nucleated cells that have proven to be key actors in this resistance. Exosomes carry bioactive oncogenic cargos that reprogram target cells to promote tumor growth, migration, metastasis, immune evasion, and chemotherapy resistance. Tipifarnib, in combination with standard therapy, decreased tumor growth in the setting of chemotherapeutic resistance through an exosome-mediated mechanism. After using a qNANO IZON system to compare tumor-derived exosomes collected from untreated and tipifarnib-treated cells, all cancerous cell lines displayed a reduction of vesicle concentration. Tipifarnib also directly inhibited PD-L1 protein expression in chemo-sensitive cell lines and resistant cell lines. Abstract Background: Tyrosine kinase inhibitors (TKI) were initially demonstrated as an efficacious treatment for renal cell carcinoma (RCC). However, after a median treatment length of 14 months, a vast majority of patients develop resistance. This study analyzed a combination therapy of tipifarnib (Tipi) + sunitinib that targeted exosome-conferred drug resistance. Methods: 786-O, 786-O-SR (sunitinib resistant), A498, A498-SR, Caki-2, Caki-2-SR, and 293T cells were cultured. Exosomes were collected using differential ultracentrifugation. Cell proliferation, Jurkat T cell immune assay, and immunoblot analysis were used for downstream analysis. Results: SR exosomes treatment displayed a cytotoxic effect on immune cells. This cytotoxic effect was associated with increased expression of PD-L1 on SR exosomes when compared to sunitinib-sensitive (SS) exosomes. Additionally, Tipi treatment downregulated PD-L1 expression on exosomes derived from SR cell lines. Tipi’s ability to downregulate PD-L1 in exosomes has a significant application within patients. Exosomes collected from patients with RCC showed increased PD-L1 expression over subjects without RCC. Next, exosome concentrations were then compared after Tipi treatment, with all SS cell lines displaying an even greater reduction. On immunoblot assay, 293T cells showed a dose-dependent increase in Alix with no change in either nSMase or Rab27a. Conversely, all the SS and SR cell lines displayed a decrease in all three markers. After a cell proliferation employed a 48-h treatment on all SS and SR cell lines, the drug combination displayed synergistic ability to decrease tumor growth. Conclusions: Tipifarnib attenuates both the exosome endosomal sorting complex required for endosomal sorting complex required for transport (ESCRT)-dependent and ESCRT-independent pathways, thereby blocking exosome biogenesis and secretion as well as downregulating PD-L1 on SS and SR cells.
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He H, Cong S, Wang Y, Ji Q, Liu W, Qu N. Analysis of the key ligand receptor CADM1_CADM1 in the regulation of thyroid cancer based on scRNA-seq and bulk RNA-seq data. Front Endocrinol (Lausanne) 2022; 13:969914. [PMID: 36523593 PMCID: PMC9744787 DOI: 10.3389/fendo.2022.969914] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 11/07/2022] [Indexed: 11/30/2022] Open
Abstract
INTRODUCTION Advanced papillary thyroid cancer (PTC) has a poor prognosis, 60~70% of which become radio iodine refractory (RAI-R), but the molecular markers that assess PTC progress to advanced PTC remain unclear. Meanwhile, current targeted therapies are badly effective due to drug resistance and adverse side effects. Ligand-receptor pairs (L/R pairs) play an important role in the interactions between tumor cells and other cells in the tumor microenvironment (TME). Nowadays, therapies targeting ligand-receptor pairs in the TME are advancing rapidly in the treatment of advanced cancers. However, therapies targeting L/R pairs applied to advanced PTC remains challenging because of limited knowledge about L/R pairs in PTC. METHODS We screened the critical L/R pair: CADM1-CADM1 using 65311 single-cell RNA sequencing (scRNA-seq) samples from 7 patients in different stage of PTC and bulk RNA-seq datasets containing data from 487 tumor samples and 58 para-carcinoma samples. Moreover, the expression levels of CADM1-CADM1 was assessed by quantitative real time polymerase chain reaction (qRT-PCR) and the function was analyzed using Transwell immigration assay. RESULTS We found that CADM1_CADM1 could be regarded as a biomarker representing a good prognosis of PTC. In addition, the high expression of CADM1_CADM1 can strongly increase the sensitivity of many targeted drugs, which can alleviate drug resistance. And the results of qRT-PCR showed us that the expression of CADM1_CADM1 in PTC was down-regulated and overexpression of CADM1 could suppresses tumor cell invasion migration. CONCLUSION Our study identified that CADM1_CADM1 played an essential role in the progression of PTC for the first time and our findings provide a new potential prognostic and therapeutic ligand-receptor pair for advanced PTC.
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Affiliation(s)
- Hui He
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
- Department of Laparoscopic Surgery, the First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Shan Cong
- Department of Laparoscopic Surgery, the First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Yu Wang
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Qinghai Ji
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Weiyan Liu
- Department of General Surgery, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, China
- *Correspondence: Weiyan Liu, ; Ning Qu,
| | - Ning Qu
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
- *Correspondence: Weiyan Liu, ; Ning Qu,
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Roskoski R. Properties of FDA-approved small molecule protein kinase inhibitors: A 2022 update. Pharmacol Res 2021; 175:106037. [PMID: 34921994 DOI: 10.1016/j.phrs.2021.106037] [Citation(s) in RCA: 118] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 12/12/2021] [Indexed: 01/03/2023]
Abstract
Owing to the dysregulation of protein kinase activity in many diseases including cancer, this enzyme family has become one of the most important drug targets in the 21st century. There are 68 FDA-approved therapeutic agents that target about two dozen different protein kinases and six of these drugs were approved in 2021. Of the approved drugs, twelve target protein-serine/threonine protein kinases, four are directed against dual specificity protein kinases (MEK1/2), thirteen block nonreceptor protein-tyrosine kinases, and 39 target receptor protein-tyrosine kinases. The data indicate that 58 of these drugs are prescribed for the treatment of neoplasms (49 against solid tumors including breast, lung, and colon, five against nonsolid tumors such as leukemias, and four against both solid and nonsolid tumors: acalabrutinib, ibrutinib, imatinib, and midostaurin). Three drugs (baricitinib, tofacitinib, upadacitinib) are used for the treatment of inflammatory diseases including rheumatoid arthritis. Of the 68 approved drugs, eighteen are used in the treatment of multiple diseases. The following six drugs received FDA approval in 2021 for the treatment of these specified diseases: belumosudil (graft vs. host disease), infigratinib (cholangiocarcinomas), mobocertinib and tepotinib (specific forms of non-small cell lung cancer), tivozanib (renal cell carcinoma), and trilaciclib (to decrease chemotherapy-induced myelosuppression). All of the FDA-approved drugs are orally effective with the exception of netarsudil, temsirolimus, and the newly approved trilaciclib. This review summarizes the physicochemical properties of all 68 FDA-approved small molecule protein kinase inhibitors including lipophilic efficiency and ligand efficiency.
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Affiliation(s)
- Robert Roskoski
- Blue Ridge Institute for Medical Research, 3754 Brevard Road, Suite 106, Box 19, Horse Shoe, NC 28742-8814, United States.
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