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Zhou L, Reddy MB, Mittapalli RK, Yang J, Yin D. Oncology Combination Dose-Finding Study Design for Targeted and Immuno-Oncology Therapies. Clin Pharmacol Ther 2024; 115:29-35. [PMID: 37881828 DOI: 10.1002/cpt.3085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 09/24/2023] [Indexed: 10/27/2023]
Abstract
Combination therapies are often evaluated during the clinical development of oncology investigational agents. A new investigational agent may be combined with one or more approved agent(s) or investigational agent(s). As the initial step to test combination therapies, combination dose escalation of an investigational agent and an approved drug is generally conducted using one of the following designs: sequential design, parallel (staggered) design, healthy participant first-in-human prior to first-in-patient combination escalation, monotherapy lead-in (intra-patient "crossover"), and potentially combination escalation (no monotherapy component). Dose-finding studies for the combinations of two investigational agents may follow similar principles and considerations, and a more conservative approach may be required. A comparison of the characteristics of these designs indicates an efficient design should consider factors including the predicted difference in dose/exposure-response relationships between monotherapy and combination therapy, any potential for pharmacokinetic and pharmacodynamic interactions between the combinatory agents, and the benefit/risk to study participants, etc. In this report, we propose application scenarios for each trial design based on the above considerations and a review of the internal database and published external studies. Generation of robust exposure-response data via an appropriate design will assist the selection of appropriate doses for further assessment to support optimal dose selection as encouraged by the US Food and Drug Administration based on Project Optimus.
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Affiliation(s)
- Li Zhou
- Clinical Pharmacology, Oncology Research and Development, Pfizer Inc., San Diego, USA
| | - Micaela B Reddy
- Clinical Pharmacology, Oncology Research and Development, Pfizer lnc., Boulder, USA
| | - Rajendar K Mittapalli
- Clinical Pharmacology, Oncology Research and Development, Pfizer Inc., San Diego, USA
| | - Jing Yang
- Clinical Pharmacology, Oncology Research and Development, Pfizer Inc., San Diego, USA
| | - Donghua Yin
- Clinical Pharmacology, Oncology Research and Development, Pfizer Inc., San Diego, USA
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2
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Backer N, Kumar A, Singh AK, Singh H, Narasimhan B, Kumar P. Medicinal chemistry aspects of uracil containing dUTPase inhibitors targeting colorectal cancer. Drug Discov Today 2024; 29:103853. [PMID: 38070703 DOI: 10.1016/j.drudis.2023.103853] [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] [Received: 09/04/2023] [Revised: 11/23/2023] [Accepted: 12/05/2023] [Indexed: 12/18/2023]
Abstract
Deoxyuridine-5'-triphosphate nucleotidohydrolase (dUTPase), a vital enzyme in pyrimidine metabolism, is a prime target for treating colorectal cancer. Uracil shares structural traits with DNA/RNA bases, prompting exploration by medicinal chemists for pharmacological modifications. Some existing drugs, including thymidylate synthase (TS) and dUTPase inhibitors, incorporate uracil moieties. These derivatives hinder crucial cell proliferation pathways encompassing TS, dUTPases, dihydropyrimidine dehydrogenase, and uracil-DNA glycosylase. This review compiles uracil derivatives that have served as dUTPase inhibitors across various organisms, forming a library for targeting human dUTPase. Insights into their structural requisites for human applications and comparative analyses of binding pockets are provided for analyzing the compounds against human dUTPase.
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Affiliation(s)
- Nabeel Backer
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda 151401, India
| | - Adarsh Kumar
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda 151401, India
| | - Ankit Kumar Singh
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda 151401, India
| | - Harshwardhan Singh
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda 151401, India
| | | | - Pradeep Kumar
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda 151401, India.
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3
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Riera-Ruiz C, Moriyama H. Enzyme kinetics of deoxyuridine triphosphatase from Western corn rootworm. BMC Res Notes 2023; 16:336. [PMID: 37974243 PMCID: PMC10652518 DOI: 10.1186/s13104-023-06618-2] [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: 07/31/2023] [Accepted: 11/07/2023] [Indexed: 11/19/2023] Open
Abstract
OBJECTIVE The Western corn rootworm (WCR), Diabrotica virgifera virgifera, is a highly adaptable insect pest that has evolved resistance to a variety of control strategies, including insecticides. Therefore, it is interesting to examine how housekeeping proteins in WCR have been changed under WCR-controlling strategies. In this study, we focused on one of such proteins in WCR, a ubiquitous enzyme 5'-triphosphate nucleotidohydrolase (dUTPase). In the thymidine synthetic pathway, dUTPase hydrolyzes deoxyuridine triphosphate (dUTP) and supplies the substrate, deoxyuridine monophosphate, for the thymidylate synthase (TS). It decreases the cellular content of uracil, reducing uracil misincorporation into DNA. Suppressing the dUTPase activity, therefore, contributes to thymineless death. In this study, we investigated the enzymatic properties of dUTPase. RESULTS The WCR dUTPase gene (DUT) was synthesized with the addition of His-tag corresponding DNA sequence and then cloned and expressed in Escherichia coli, and the protein product was purified. The product of WCR DUT hydrolyzed dUTP and was designated as dUTPase. WCR dUTPase did not hydrolyze dATP, dTTP, dCTP, or dGTP. WCR dUTPase was analyzed via size-exclusion chromatography and exhibited a molecular weight corresponding to that of trimer. The present format can be interpreted as nuclear trimer type. Possible isomers will be examined once transcriptome analyses are conducted.
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Affiliation(s)
- Carlos Riera-Ruiz
- School of Biological Sciences, University of Nebraska-Lincoln, 243 Manter Hall, Lincoln, NE, 68588-0118, USA
- Escuela Superior Politécnica del Litoral, Centro de Investigaciones Biotecnológicas del Ecuador, ESPOL Polytechnic University, ESPOL, Campus Gustavo Galindo Km 30.5 Vía Perimetral, P.O Box 09-01-5863, Guayaquil, Ecuador
| | - Hideaki Moriyama
- School of Biological Sciences, University of Nebraska-Lincoln, 243 Manter Hall, Lincoln, NE, 68588-0118, USA.
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Verma H, Narendra G, Raju B, Singh PK, Silakari O. Dihydropyrimidine Dehydrogenase-Mediated Resistance to 5-Fluorouracil: Mechanistic Investigation and Solution. ACS Pharmacol Transl Sci 2022; 5:1017-1033. [PMID: 36407958 PMCID: PMC9667542 DOI: 10.1021/acsptsci.2c00117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Indexed: 11/29/2022]
Abstract
5-Fluorouracil (5-FU) is one of the most widely used chemotherapeutics for the treatment of cancers associated with the aerodigestive tract, breast, and colorectal system. The efficacy of 5-FU is majorly affected by dihydropyrimidine dehydrogenase (DPD) as it degrades more than 80% of administered 5-FU into an inactive metabolite, dihydrofluorouracil. Herein we discuss the molecular mechanism of this inactivation by analyzing the interaction pattern and electrostatic complementarity of the DPD-5-FU complex. The basis of DPD overexpression in cancer cell lines due to significantly distinct levels of the miRNAs (miR-134, miR-27b, and miR-27a) compared to normal cells has also been outlined. Additionally, some kinases including sphingosine kinase 2 (SphK2) have been reported to correlate with DPD expression. Currently, to address this problem various strategies are reported in the literature, including 5-FU analogues (bypass the DPD-mediated inactivation), DPD downregulators (regulate the DPD expression levels in tumors), inhibitors (as promising adjuvants), and formulation development loaded with 5-FU (liposomes, nanoparticles, nanogels, etc.), which are briefly discussed in this Review.
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Affiliation(s)
- Himanshu Verma
- Molecular
Modeling Lab, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab147002, India
| | - Gera Narendra
- Molecular
Modeling Lab, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab147002, India
| | - Baddipadige Raju
- Molecular
Modeling Lab, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab147002, India
| | - Pankaj Kumar Singh
- Integrative
Physiology and Pharmacology, Institute of Biomedicine, Faculty of
Medicine, University of Turku, FI-20520Turku, Finland
| | - Om Silakari
- Molecular
Modeling Lab, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab147002, India
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Araki H, Takenaka T, Takahashi K, Yamashita F, Matsuoka K, Yoshisue K, Ieiri I. A semimechanistic population pharmacokinetic and pharmacodynamic model incorporating autoinduction for the dose justification of TAS-114. CPT Pharmacometrics Syst Pharmacol 2022; 11:604-615. [PMID: 34951129 PMCID: PMC9124359 DOI: 10.1002/psp4.12747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 10/17/2021] [Accepted: 11/09/2021] [Indexed: 12/20/2022] Open
Abstract
TAS-114 is a dual deoxyuridine triphosphatase (dUTPase) and dihydropyrimidine dehydrogenase (DPD) inhibitor expected to widen the therapeutic index of capecitabine. Its maximum tolerated dose (MTD) was determined from a safety perspective in a combination study with capecitabine; however, its inhibitory effects on DPD activity were not assessed in the study. The dose justification to select its MTD as the recommended dose in terms of DPD inhibition has been required, but the autoinduction profile of TAS-114 made it difficult. To this end, an approach using a population pharmacokinetic (PPK)/pharmacodynamic (PD) model incorporating autoinduction was planned; however, the utility of this approach in the dose justification has not been reported. Thus, the aim of this study was to demonstrate the utility of a PPK/PD model incorporating autoinduction in the dose justification via a case study of TAS-114. Plasma concentrations of TAS-114 from 185 subjects and those of the endogenous DPD substrate uracil from 24 subjects were used. A two-compartment model with first-order absorption with lag time and an enzyme turnover model were selected for the pharmacokinetic (PK) model. Moreover, an indirect response model was selected for the PD model to capture the changes in plasma uracil concentrations. Model-based simulations provided the dose justification that DPD inhibition by TAS-114 reached a plateau level at the MTD, whereas exposures of TAS-114 increased dose dependently. Thus, the utility of a PPK/PD model incorporating autoinduction in the dose justification was demonstrated via this case study of TAS-114.
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Affiliation(s)
- Hikari Araki
- Pharmacokinetics Research LaboratoriesTaiho Pharmaceutical Co. Ltd.TsukubaIbarakiJapan
| | - Toru Takenaka
- Pharmacokinetics Research LaboratoriesTaiho Pharmaceutical Co. Ltd.TsukubaIbarakiJapan
| | - Koichi Takahashi
- Pharmacokinetics Research LaboratoriesTaiho Pharmaceutical Co. Ltd.TsukubaIbarakiJapan
| | - Fumiaki Yamashita
- Pharmacokinetics Research LaboratoriesTaiho Pharmaceutical Co. Ltd.TsukubaIbarakiJapan
| | - Kazuaki Matsuoka
- Pharmacokinetics Research LaboratoriesTaiho Pharmaceutical Co. Ltd.TsukubaIbarakiJapan
| | - Kunihiro Yoshisue
- Pharmacokinetics Research LaboratoriesTaiho Pharmaceutical Co. Ltd.TsukubaIbarakiJapan
| | - Ichiro Ieiri
- Department of Clinical Pharmacology and Biopharmaceutics, Graduate School of Pharmaceutical SciencesKyushu UniversityFukuokaJapan
- Department of PharmacyKyushu University HospitalFukuokaJapan
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Identification and Characterization of a Novel Epitope of ASFV-Encoded dUTPase by Monoclonal Antibodies. Viruses 2021; 13:v13112175. [PMID: 34834981 PMCID: PMC8620545 DOI: 10.3390/v13112175] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/17/2021] [Accepted: 10/26/2021] [Indexed: 12/28/2022] Open
Abstract
Deoxyuridine 5'-triphosphate nucleotidohydrolase (dUTPase) of African swine fever virus (ASFV) is an essential enzyme required for efficient virus replication. Previous crystallography data have indicated that dUTPase (E165R) may serve as a therapeutic target for inhibiting ASFV replication; however, the specificity of the targeting site(s) in ASFV dUTPase remains unclear. In this study, 19 mouse monoclonal antibodies (mAbs) were produced, in which four mAbs showed inhibitory reactivity against E165R recombinant protein. Epitope mapping studies indicated that E165R has three major antigenic regions: 100-120 aa, 120-140 aa, and 140-165 aa. Three mAbs inhibited the dUTPase activity of E165R by binding to the highly conserved 149-RGEGRFGSTG-158 amino acid sequence. Interestingly, 8F6 mAb specifically recognized ASFV dUTPase but not Sus scrofa dUTPase, which may be due to structural differences in the amino acids of F151, R153, and F154 in the motif V region. In summary, we developed anti-E165R-specific mAbs, and identified an important antibody-binding antigenic epitope in the motif V of ASFV dUTPase. Our study provides a comprehensive analysis of mAbs that target the antigenic epitope of ASFV dUTPase, which may contribute to the development of novel antibody-based ASFV therapeutics.
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7
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Viruses with U-DNA: New Avenues for Biotechnology. Viruses 2021; 13:v13050875. [PMID: 34068736 PMCID: PMC8150378 DOI: 10.3390/v13050875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 05/05/2021] [Accepted: 05/06/2021] [Indexed: 02/07/2023] Open
Abstract
Deoxyuridine in DNA has recently been in the focus of research due to its intriguing roles in several physiological and pathophysiological situations. Although not an orthodox DNA base, uracil may appear in DNA via either cytosine deamination or thymine-replacing incorporations. Since these alterations may induce mutation or may perturb DNA–protein interactions, free living organisms from bacteria to human contain several pathways to counteract uracilation. These efficient and highly specific repair routes uracil-directed excision repair initiated by representative of uracil-DNA glycosylase families. Interestingly, some bacteriophages exist with thymine-lacking uracil-DNA genome. A detailed understanding of the strategy by which such phages can replicate in bacteria where an efficient repair pathway functions for uracil-excision from DNA is expected to reveal novel inhibitors that can also be used for biotechnological applications. Here, we also review the several potential biotechnological applications already implemented based on inhibitors of uracil-excision repair, such as Crispr-base-editing and detection of nascent uracil distribution pattern in complex genomes.
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Davison C, Morelli R, Knowlson C, McKechnie M, Carson R, Stachtea X, McLaughlin KA, Prise VE, Savage K, Wilson RH, Mulligan KA, Wilson PM, Ladner RD, LaBonte MJ. Targeting nucleotide metabolism enhances the efficacy of anthracyclines and anti-metabolites in triple-negative breast cancer. NPJ Breast Cancer 2021; 7:38. [PMID: 33824328 PMCID: PMC8024381 DOI: 10.1038/s41523-021-00245-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 03/03/2021] [Indexed: 12/12/2022] Open
Abstract
Triple-negative breast cancer (TNBC) remains the most lethal breast cancer subtype with poor response rates to the current chemotherapies and a lack of additional effective treatment options. We have identified deoxyuridine 5'-triphosphate nucleotidohydrolase (dUTPase) as a critical gatekeeper that protects tumour DNA from the genotoxic misincorporation of uracil during treatment with standard chemotherapeutic agents commonly used in the FEC regimen. dUTPase catalyses the hydrolytic dephosphorylation of deoxyuridine triphosphate (dUTP) to deoxyuridine monophosphate (dUMP), providing dUMP for thymidylate synthase as part of the thymidylate biosynthesis pathway and maintaining low intracellular dUTP concentrations. This is crucial as DNA polymerase cannot distinguish between dUTP and deoxythymidylate triphosphate (dTTP), leading to dUTP misincorporation into DNA. Targeting dUTPase and inducing uracil misincorporation during the repair of DNA damage induced by fluoropyrimidines or anthracyclines represents an effective strategy to induce cell lethality. dUTPase inhibition significantly sensitised TNBC cell lines to fluoropyrimidines and anthracyclines through imbalanced nucleotide pools and increased DNA damage leading to decreased proliferation and increased cell death. These results suggest that repair of treatment-mediated DNA damage requires dUTPase to prevent uracil misincorporation and that inhibition of dUTPase is a promising strategy to enhance the efficacy of TNBC chemotherapy.
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Affiliation(s)
- Craig Davison
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Roisin Morelli
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Catherine Knowlson
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Melanie McKechnie
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Robbie Carson
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Xanthi Stachtea
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | | | | | - Kienan Savage
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Richard H Wilson
- Translational Research Centre, University of Glasgow, Glasgow, UK
| | | | | | - Robert D Ladner
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Melissa J LaBonte
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK.
- Medicine, Dentistry and Biomedical Sciences: Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK.
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Shorstova T, Su J, Zhao T, Dahabieh M, Leibovitch M, De Sa Tavares Russo M, Avizonis D, Rajkumar S, Watson IR, Del Rincón SV, Miller WH, Foulkes WD, Witcher M. Reprogramming of Nucleotide Metabolism Mediates Synergy between Epigenetic Therapy and MAP Kinase Inhibition. Mol Cancer Ther 2021; 20:64-75. [PMID: 33087508 DOI: 10.1158/1535-7163.mct-20-0259] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 07/31/2020] [Accepted: 10/08/2020] [Indexed: 11/16/2022]
Abstract
Small cell carcinoma of the ovary, hypercalcemic type (SCCOHT) is a rare but often lethal cancer that is diagnosed at a median age of 24 years. Optimal management of patients is not well defined, and current treatment remains challenging, necessitating the discovery of novel therapeutic approaches. The identification of SMARCA4-inactivating mutations invariably characterizing this type of cancer provided insights facilitating diagnostic and therapeutic measures against this disease. We show here that the BET inhibitor OTX015 acts in synergy with the MEK inhibitor cobimetinib to repress the proliferation of SCCOHT in vivo Notably, this synergy is also observed in some SMARCA4-expressing ovarian adenocarcinoma models intrinsically resistant to BETi. Mass spectrometry, coupled with knockdown of newly found targets such as thymidylate synthase, revealed that the repression of a panel of proteins involved in nucleotide synthesis underlies this synergy both in vitro and in vivo, resulting in reduced pools of nucleotide metabolites and subsequent cell-cycle arrest. Overall, our data indicate that dual treatment with BETi and MEKi represents a rational combination therapy against SCCOHT and potentially additional ovarian cancer subtypes.
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Affiliation(s)
- Tatiana Shorstova
- Departments of Oncology and Experimental Medicine, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada
| | - Jie Su
- Departments of Oncology and Experimental Medicine, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada
| | - Tiejun Zhao
- Departments of Oncology and Experimental Medicine, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada
| | - Michael Dahabieh
- Departments of Oncology and Experimental Medicine, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada
| | - Matthew Leibovitch
- Departments of Oncology and Experimental Medicine, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada
| | | | - Daina Avizonis
- Goodman Cancer Research Centre's (GCRC) Metabolomics Facility, McGill University, Montreal, Quebec, Canada
| | - Shivshankari Rajkumar
- Department of Biochemistry, Goodman Research Centre, McGill University, Montreal, Quebec, Canada
| | - Ian R Watson
- Department of Biochemistry, Goodman Research Centre, McGill University, Montreal, Quebec, Canada
| | - Sonia V Del Rincón
- Departments of Oncology and Experimental Medicine, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada
| | - Wilson H Miller
- Departments of Oncology and Experimental Medicine, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada
| | - William D Foulkes
- Departments of Oncology and Experimental Medicine, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada
- Departments of Oncology and Human Genetics, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada
| | - Michael Witcher
- Departments of Oncology and Experimental Medicine, McGill University, Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montreal, Quebec, Canada.
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Kawazoe A, Takahari D, Keisho C, Nakamura Y, Ikeno T, Wakabayashi M, Nomura S, Tamura H, Fukutani M, Hirano N, Saito Y, Kambe M, Sato A, Shitara K. A multicenter phase II study of TAS-114 in combination with S-1 in patients with pretreated advanced gastric cancer (EPOC1604). Gastric Cancer 2021; 24:190-196. [PMID: 32700159 DOI: 10.1007/s10120-020-01107-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 07/13/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND This is a phase 2 study aimed at evaluating the efficacy and safety of TAS-114, a novel deoxyuridine triphosphatase inhibitor, combined with S-1 in patients with advanced gastric cancer (AGC). METHODS Eligible patients had AGC with measurable lesions, according to the Response Evaluation Criteria in Solid Tumors (RECIST, v1.1), with two or more previous chemotherapy regimens including fluoropyrimidines, platinum agents, and taxanes or irinotecan. The primary endpoint was objective response rate (ORR) according to the RECIST, v1.1. Twenty-nine patients were required according to Simon's optimal two-stage design, with one-sided a = 5% and power = 80%. Threshold and expected ORRs were 5% and 25%. Patients received TAS-114 (400 mg/body, twice a day) and S-1 (30 mg/m2, twice a day) for 14 days, followed by 7 days of rest in one 3-week cycle. Protein expression levels of dUTPase and BRCA1 in tumor samples were determined by immunohistochemistry. RESULTS Accrual was terminated in June 2018 because meeting the predefined efficacy criteria was considered difficult. ORR and disease control rate were 5.0% [95% confidence interval (CI), 0.1-24.9%] and 70.0% (95% CI, 45.7-88.1%), respectively, for all 20 patients enrolled. Median progression-free survival (PFS) and overall survival were 2.4 months (95% CI, 1.2-3.3 months) and 7.1 months (95% CI, 5.2-9.4 months), respectively. Median PFS in the groups with high and low dUTPase protein expression in the cytoplasm was 2.8 months (95% CI, 1.4-3.9) and 1.6 months (95% CI, 0.6-2.4), respectively [hazard ratio, 0.40 (95% CI, 0.16-1.04), log-rank test two-sided p = 0.047]. Grade 3 or higher treatment-related adverse events included anemia (20%), leucopenia (15%), neutropenia (10%), rash (10%), thrombocytopenia (5%), and lymphopenia (5%) CONCLUSIONS: TAS-114 with S-1 showed only modest antitumor activity with acceptable safety profiles for patients heavily pretreated with AGC.
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Affiliation(s)
- Akihito Kawazoe
- Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Daisuke Takahari
- Department of Gastroenterology, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Chin Keisho
- Department of Gastroenterology, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Yoshiaki Nakamura
- Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Takashi Ikeno
- Clinical Research Support Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Masashi Wakabayashi
- Clinical Research Support Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Shogo Nomura
- Clinical Research Support Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Hitomi Tamura
- Clinical Research Support Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Miki Fukutani
- Clinical Research Support Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Nami Hirano
- Clinical Research Support Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Yumiko Saito
- Department of Clinical Research Department, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Moe Kambe
- Department of Clinical Research Department, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Akihiro Sato
- Clinical Research Support Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Kohei Shitara
- Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
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11
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Liang R, Wang G, Zhang D, Ye G, Li M, Shi Y, Shi J, Chen H, Peng G. Structural comparisons of host and African swine fever virus dUTPases reveal new clues for inhibitor development. J Biol Chem 2021; 296:100015. [PMID: 33139328 PMCID: PMC7948977 DOI: 10.1074/jbc.ra120.014005] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 10/24/2020] [Accepted: 11/02/2020] [Indexed: 11/06/2022] Open
Abstract
African swine fever, caused by the African swine fever virus (ASFV), is among the most significant swine diseases. There are currently no effective treatments against ASFV. ASFV contains a gene encoding a dUTPase (E165R), which is required for viral replication in swine macrophages, making it an attractive target for inhibitor development. However, the full structural details of the ASFV dUTPase and those of the comparable swine enzyme are not available, limiting further insights. Herein, we determine the crystal structures of ASFV dUTPase and swine dUTPase in both their ligand-free and ligand-bound forms. We observe that the swine enzyme employs a classical dUTPase architecture made up of three-subunit active sites, whereas the ASFV enzyme employs a novel two-subunit active site. We then performed a comparative analysis of all dUTPase structures uploaded in the Protein Data Bank (PDB), which showed classical and non-classical types were mainly determined by the C-terminal β-strand orientation, and the difference was mainly related to the four amino acids behind motif IV. Thus, our study not only explains the reason for the structural diversity of dUTPase but also reveals how to predict dUTPase type, which may have implications for the dUTPase family. Finally, we tested two dUTPase inhibitors developed for the Plasmodium falciparum dUTPase against the swine and ASFV enzymes. One of these compounds inhibited the ASFV dUTPase at low micromolar concentrations (Kd = 15.6 μM) and with some selectivity (∼2x) over swine dUTPase. In conclusion, our study expands our understanding of the dUTPase family and may aid in the development of specific ASFV inhibitors.
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Affiliation(s)
- Rui Liang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei Province, China
| | - Gang Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei Province, China
| | - Ding Zhang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei Province, China
| | - Gang Ye
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei Province, China
| | - Mengxia Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei Province, China
| | - Yuejun Shi
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei Province, China; College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province, China
| | - Jiale Shi
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei Province, China
| | - Huanchun Chen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei Province, China
| | - Guiqing Peng
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei Province, China.
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Yamamoto N, Hayashi H, Planchard D, Morán T, Gregorc V, Dowell J, Sakai H, Yoh K, Nishio M, Cortot AB, Benhadji KA, Soni N, Huang J, Makris L, Cedres S. A randomized, phase 2 study of deoxyuridine triphosphatase inhibitor, TAS-114, in combination with S-1 versus S-1 alone in patients with advanced non-small-cell lung cancer. Invest New Drugs 2020; 38:1588-1597. [PMID: 32246224 PMCID: PMC7497678 DOI: 10.1007/s10637-020-00930-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 03/20/2020] [Indexed: 01/05/2023]
Abstract
Introduction TAS-114 is a potent inhibitor of deoxyuridine triphosphatase, which is a gatekeeper protein preventing uracil and 5-fluorouracil (5-FU) misincorporation into DNA. TAS-114 has been suggested to enhance the antitumor activity of 5-FU. This randomized, phase 2 study investigated TAS-114 plus S-1 (TAS-114/S-1) vs. S-1 in non-small-cell lung cancer (NSCLC) patients. Methods Patients with advanced NSCLC, previously treated with ≥ 2 regimens, were randomized 1:1 to receive TAS-114 (400 mg)/S-1 (30 mg/m2) or S-1 (30 mg/m2). Progression-free survival (PFS, independent central review) was the primary endpoint. Secondary endpoints included disease control rate (DCR), overall survival (OS), overall response rate (ORR), and safety. Results In total, 127 patients received treatment. Median PFS was 3.65 and 4.17 months in the TAS-114/S-1 and S-1 groups, respectively (hazard ratio [HR] 1.16, 95% confidence interval [CI] 0.71–1.88; P = 0.2744). DCR was similar between groups (TAS-114/S-1 80.3%, S-1 75.9%) and median OS was 7.92 and 9.82 months for the TAS-114/S-1 and S-1 groups, respectively (HR 1.31, 95% CI 0.80–2.14; P = 0.1431). The ORR was higher in the TAS-114/S-1 group than the S-1 group (19.7% vs. 10.3%), and more patients with tumor shrinkage were observed in the TAS-114/S-1 group. Incidence rates of anemia, skin toxicities, and Grade ≥ 3 treatment-related adverse events were higher in the TAS-114/S-1 group compared with the monotherapy group. Conclusions Although the TAS-114/S-1 combination improved the response rate, this did not translate into improvements in PFS. Clinical Trial Registration No. NCT02855125 (ClinicalTrials.gov) registered on 4 August 2016.
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Affiliation(s)
- Nobuyuki Yamamoto
- Third Department of Internal Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama Prefecture, 641-8509, Japan.
| | - Hidetoshi Hayashi
- Department of Medical Oncology, Kindai University Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - David Planchard
- Department of Medical Oncology, Thoracic Group, Institut Gustave Roussy, 114 rue Édouard- Vaillant, Villejuif Cedex, 94805, France
| | - Teresa Morán
- Medical Oncology, Catalan Institute of Oncology, Hospital Germans Trias i Pujol, Universitat Autonoma de Barcelona (UAB), B-ARGO, Carretera de Canyet s/n, Badalona, Barcelona, 08916, Spain
| | - Vanesa Gregorc
- Department of Oncology, Division of Experimental Medicine, IRCCS Ospedale San Raffaele, Via Olgettina, 60, Milano, 20132, Italy
| | - Jonathan Dowell
- Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA
| | - Hiroshi Sakai
- Department of Thoracic Oncology, Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, 362-0806, Japan
| | - Kiyotaka Yoh
- Department of Thoracic Oncology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Makoto Nishio
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto, Tokyo, 135-8550, Japan
| | - Alexis B Cortot
- Thoracic Oncology Department, Centre Hospitalier Universitaire de Lille, 2 Avenue Oscar Lambret, Lille, 59000, France
| | - Karim A Benhadji
- Department of Clinical Development, Taiho Oncology, Inc, 101 Carnegie Center, Suite 101, Princeton, NJ, 08540, USA
| | - Nital Soni
- Department of Clinical Development, Taiho Oncology, Inc, 101 Carnegie Center, Suite 101, Princeton, NJ, 08540, USA
| | - Jinhong Huang
- Department of Pharmacovigilance, Taiho Pharmaceutical Co., Ltd, 1-27 Kandanishiki-cho, Chiyoda-ku, Tokyo, 101-8444, Japan
| | - Lukas Makris
- Stathmi, Inc, 125 Brownsburg Rd, New Hope, PA, 18938, USA
| | - Susana Cedres
- Medical Oncology Department, Vall d´Hebron University Hospital/Vall d´Hebron Institute of Oncology, Passeig de la Vall d'Hebron 119-129, Barcelona, 08035, Spain
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The Role of a Key Amino Acid Position in Species-Specific Proteinaceous dUTPase Inhibition. Biomolecules 2019; 9:biom9060221. [PMID: 31174420 PMCID: PMC6627510 DOI: 10.3390/biom9060221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 05/27/2019] [Indexed: 02/06/2023] Open
Abstract
Protein inhibitors of key DNA repair enzymes play an important role in deciphering physiological pathways responsible for genome integrity, and may also be exploited in biomedical research. The staphylococcal repressor StlSaPIbov1 protein was described to be an efficient inhibitor of dUTPase homologues showing a certain degree of species-specificity. In order to provide insight into the inhibition mechanism, in the present study we investigated the interaction of StlSaPIbov1 and Escherichia coli dUTPase. Although we observed a strong interaction of these proteins, unexpectedly the E. coli dUTPase was not inhibited. Seeking a structural explanation for this phenomenon, we identified a key amino acid position where specific mutations sensitized E. coli dUTPase to StlSaPIbov1 inhibition. We solved the three-dimensional (3D) crystal structure of such a mutant in complex with the substrate analogue dUPNPP and surprisingly found that the C-terminal arm of the enzyme, containing the P-loop-like motif was ordered in the structure. This segment was never localized before in any other E. coli dUTPase crystal structures. The 3D structure in agreement with solution phase experiments suggested that ordering of the flexible C-terminal segment upon substrate binding is a major factor in defining the sensitivity of E. coli dUTPase for StlSaPIbov1 inhibition.
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