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Manickasamy MK, Jayaprakash S, Girisa S, Kumar A, Lam HY, Okina E, Eng H, Alqahtani MS, Abbas M, Sethi G, Kumar AP, Kunnumakkara AB. Delineating the role of nuclear receptors in colorectal cancer, a focused review. Discov Oncol 2024; 15:41. [PMID: 38372868 PMCID: PMC10876515 DOI: 10.1007/s12672-023-00808-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 10/20/2023] [Indexed: 02/20/2024] Open
Abstract
Colorectal cancer (CRC) stands as one of the most prevalent form of cancer globally, causing a significant number of deaths, surpassing 0.9 million in the year 2020. According to GLOBOCAN 2020, CRC ranks third in incidence and second in mortality in both males and females. Despite extensive studies over the years, there is still a need to establish novel therapeutic targets to enhance the patients' survival rate in CRC. Nuclear receptors (NRs) are ligand-activated transcription factors (TFs) that regulate numerous essential biological processes such as differentiation, development, physiology, reproduction, and cellular metabolism. Dysregulation and anomalous expression of different NRs has led to multiple alterations, such as impaired signaling cascades, mutations, and epigenetic changes, leading to various diseases, including cancer. It has been observed that differential expression of various NRs might lead to the initiation and progression of CRC, and are correlated with poor survival outcomes in CRC patients. Despite numerous studies on the mechanism and role of NRs in this cancer, it remains of significant scientific interest primarily due to the diverse functions that various NRs exhibit in regulating key hallmarks of this cancer. Thus, modulating the expression of NRs with their agonists and antagonists, based on their expression levels, holds an immense prospect in the diagnosis, prognosis, and therapeutical modalities of CRC. In this review, we primarily focus on the role and mechanism of NRs in the pathogenesis of CRC and emphasized the significance of targeting these NRs using a variety of agents, which may represent a novel and effective strategy for the prevention and treatment of this cancer.
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Affiliation(s)
- Mukesh Kumar Manickasamy
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, 781039, Assam, India
| | - Sujitha Jayaprakash
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, 781039, Assam, India
| | - Sosmitha Girisa
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, 781039, Assam, India
| | - Aviral Kumar
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, 781039, Assam, India
| | - Hiu Yan Lam
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117600, Singapore
- NUS Center for Cancer Research, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117699, Singapore
| | - Elena Okina
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117600, Singapore
- NUS Center for Cancer Research, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117699, Singapore
| | - Huiyan Eng
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117600, Singapore
- NUS Center for Cancer Research, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117699, Singapore
| | - Mohammed S Alqahtani
- Radiological Sciences Department, College of Applied Medical Sciences, King Khalid University, 61421, Abha, Saudi Arabia
- BioImaging Unit, Space Research Centre, Michael Atiyah Building, University of Leicester, Leicester, LE1 7RH, UK
| | - Mohamed Abbas
- Electrical Engineering Department, College of Engineering, King Khalid University, 61421, Abha, Saudi Arabia
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117600, Singapore
- NUS Center for Cancer Research, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117699, Singapore
| | - Alan Prem Kumar
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117600, Singapore.
- NUS Center for Cancer Research, Yong Loo Lin School of Medicine, National University of Singapore, Queenstown, 117699, Singapore.
| | - Ajaikumar B Kunnumakkara
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, 781039, Assam, India.
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2
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Tan L, Duan X, Mutyala P, Zhou T, Amin S, Zhang T, Herbst B, Askan G, Itkin T, Xiang Z, Michelassi F, Lieberman MD, Iacobuzio-Donahue CA, Leach SD, Evans T, Chen S. A targetable pathway to eliminate TRA-1-60+/TRA-1-81+ chemoresistant cancer cells. J Mol Cell Biol 2023; 15:mjad039. [PMID: 37327088 PMCID: PMC10847630 DOI: 10.1093/jmcb/mjad039] [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: 08/19/2022] [Revised: 12/18/2022] [Accepted: 06/14/2023] [Indexed: 06/18/2023] Open
Abstract
Chemoresistance is a primary cause of treatment failure in pancreatic cancer. Identifying cell surface markers specifically expressed in chemoresistant cancer cells (CCCs) could facilitate targeted therapies to overcome chemoresistance. We performed an antibody-based screen and found that TRA-1-60 and TRA-1-81, two 'stemness' cell surface markers, are highly enriched in CCCs. Furthermore, TRA-1-60+/TRA-1-81+ cells are chemoresistant compared to TRA-1-60-/TRA-1-81- cells. Transcriptome profiling identified UGT1A10, shown to be both necessary and sufficient to maintain TRA-1-60/TRA-1-81 expression and chemoresistance. From a high-content chemical screen, we identified Cymarin, which downregulates UGT1A10, eliminates TRA-1-60/TRA-1-81 expression, and increases chemosensitivity both in vitro and in vivo. Finally, TRA-1-60/TRA-1-81 expression is highly specific in primary cancer tissue and positively correlated with chemoresistance and short survival, which highlights their potentiality for targeted therapy. Therefore, we discovered a novel CCC surface marker regulated by a pathway that promotes chemoresistance, as well as a leading drug candidate to target this pathway.
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Affiliation(s)
- Lei Tan
- Department of Surgery, Weill Cornell Medicine, New York, NY 10065, USA
- Center for Energy Metabolism and Reproduction, Institute of Biomedicine and Biotechnology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Xiaohua Duan
- Department of Surgery, Weill Cornell Medicine, New York, NY 10065, USA
- Center for Genomic Health, Weill Cornell Medicine, New York, NY 10065, USA
| | - Pratyusha Mutyala
- Department of Surgery, Weill Cornell Medicine, New York, NY 10065, USA
| | - Ting Zhou
- The SKI Stem Cell Research Facility, The Center for Stem Cell Biology and Developmental Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Sadaf Amin
- Department of Surgery, Weill Cornell Medicine, New York, NY 10065, USA
| | - Tuo Zhang
- Genomic Resource Core Facility, Weill Cornell Medical College, New York, NY 10065, USA
| | - Brian Herbst
- Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Gokce Askan
- Rubenstein Center for Pancreatic Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Tomer Itkin
- Division of Regenerative Medicine, Hartman Institute for Therapeutic Organ Regeneration, Ansary Stem Cell Institute, Department of Medicine, Weill Cornell Medicine, New York, NY 10065, USA
| | - Zhaoying Xiang
- Genomic Resource Core Facility, Weill Cornell Medical College, New York, NY 10065, USA
| | | | | | | | - Steven D Leach
- Dartmouth Cancer Center, Darmouth College, Hanover, NH 03755, USA
| | - Todd Evans
- Department of Surgery, Weill Cornell Medicine, New York, NY 10065, USA
- Center for Genomic Health, Weill Cornell Medicine, New York, NY 10065, USA
| | - Shuibing Chen
- Department of Surgery, Weill Cornell Medicine, New York, NY 10065, USA
- Center for Genomic Health, Weill Cornell Medicine, New York, NY 10065, USA
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3
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Liu R, Yun Y, Feng ZY, Chen M, Zhang J. Rational Design of Trident Aptamer Scaffold for Rapid and Accurate Monitoring of 25-Hydroxyvitamin D 3 Metabolism in Living Cells. Anal Chem 2023. [PMID: 37339384 DOI: 10.1021/acs.analchem.3c00994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
The level of 25-hydroxyvitamin D3 [25(OH)VD3] in human blood is considered as the best indicator of vitamin D status, and its deficiency or excess can lead to various health problems. Current methods for monitoring 25(OH)VD3 metabolism in living cells have limitations in terms of sensitivity and specificity and are often expensive and time-consuming. To address these issues, an innovative trident scaffold-assisted aptasensor (TSA) system has been developed for the online quantitative monitoring of 25(OH)VD3 in complex biological environments. Through the computer-aided design, the TSA system includes an aptamer molecule recognition layer that is uniformly oriented, maximizing binding site availability, and enhancing sensitivity. The TSA system achieved the direct, highly sensitive, and selective detection of 25(OH)VD3 over a wide concentration range (17.4-12,800 nM), with a limit of detection of 17.4 nM. Moreover, we evaluated the efficacy of the system in monitoring the biotransformation of 25(OH)VD3 in human liver cancer cells (HepG2) and normal liver cells (L-02), demonstrating its potential as a platform for drug-drug interaction studies and candidate drug screening.
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Affiliation(s)
- Ran Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210023, China
| | - Yangfang Yun
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210023, China
| | - Zhi-Yuan Feng
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210023, China
| | - Mohan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210023, China
| | - Jingjing Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210023, China
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4
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Lei Z, Tian Q, Teng Q, Wurpel JND, Zeng L, Pan Y, Chen Z. Understanding and targeting resistance mechanisms in cancer. MedComm (Beijing) 2023; 4:e265. [PMID: 37229486 PMCID: PMC10203373 DOI: 10.1002/mco2.265] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 03/05/2023] [Accepted: 03/23/2023] [Indexed: 05/27/2023] Open
Abstract
Resistance to cancer therapies has been a commonly observed phenomenon in clinical practice, which is one of the major causes of treatment failure and poor patient survival. The reduced responsiveness of cancer cells is a multifaceted phenomenon that can arise from genetic, epigenetic, and microenvironmental factors. Various mechanisms have been discovered and extensively studied, including drug inactivation, reduced intracellular drug accumulation by reduced uptake or increased efflux, drug target alteration, activation of compensatory pathways for cell survival, regulation of DNA repair and cell death, tumor plasticity, and the regulation from tumor microenvironments (TMEs). To overcome cancer resistance, a variety of strategies have been proposed, which are designed to enhance the effectiveness of cancer treatment or reduce drug resistance. These include identifying biomarkers that can predict drug response and resistance, identifying new targets, developing new targeted drugs, combination therapies targeting multiple signaling pathways, and modulating the TME. The present article focuses on the different mechanisms of drug resistance in cancer and the corresponding tackling approaches with recent updates. Perspectives on polytherapy targeting multiple resistance mechanisms, novel nanoparticle delivery systems, and advanced drug design tools for overcoming resistance are also reviewed.
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Affiliation(s)
- Zi‐Ning Lei
- PrecisionMedicine CenterScientific Research CenterThe Seventh Affiliated HospitalSun Yat‐Sen UniversityShenzhenP. R. China
- Department of Pharmaceutical SciencesCollege of Pharmacy and Health SciencesSt. John's UniversityQueensNew YorkUSA
| | - Qin Tian
- PrecisionMedicine CenterScientific Research CenterThe Seventh Affiliated HospitalSun Yat‐Sen UniversityShenzhenP. R. China
| | - Qiu‐Xu Teng
- Department of Pharmaceutical SciencesCollege of Pharmacy and Health SciencesSt. John's UniversityQueensNew YorkUSA
| | - John N. D. Wurpel
- Department of Pharmaceutical SciencesCollege of Pharmacy and Health SciencesSt. John's UniversityQueensNew YorkUSA
| | - Leli Zeng
- PrecisionMedicine CenterScientific Research CenterThe Seventh Affiliated HospitalSun Yat‐Sen UniversityShenzhenP. R. China
| | - Yihang Pan
- PrecisionMedicine CenterScientific Research CenterThe Seventh Affiliated HospitalSun Yat‐Sen UniversityShenzhenP. R. China
| | - Zhe‐Sheng Chen
- Department of Pharmaceutical SciencesCollege of Pharmacy and Health SciencesSt. John's UniversityQueensNew YorkUSA
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5
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Kumar S, Sherman MY. Resistance to TOP-1 Inhibitors: Good Old Drugs Still Can Surprise Us. Int J Mol Sci 2023; 24:ijms24087233. [PMID: 37108395 PMCID: PMC10138578 DOI: 10.3390/ijms24087233] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 04/07/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Irinotecan (SN-38) is a potent and broad-spectrum anticancer drug that targets DNA topoisomerase I (Top1). It exerts its cytotoxic effects by binding to the Top1-DNA complex and preventing the re-ligation of the DNA strand, leading to the formation of lethal DNA breaks. Following the initial response to irinotecan, secondary resistance is acquired relatively rapidly, compromising its efficacy. There are several mechanisms contributing to the resistance, which affect the irinotecan metabolism or the target protein. In addition, we have demonstrated a major resistance mechanism associated with the elimination of hundreds of thousands of Top1 binding sites on DNA that can arise from the repair of prior Top1-dependent DNA cleavages. Here, we outline the major mechanisms of irinotecan resistance and highlight recent advancements in the field. We discuss the impact of resistance mechanisms on clinical outcomes and the potential strategies to overcome resistance to irinotecan. The elucidation of the underlying mechanisms of irinotecan resistance can provide valuable insights for the development of effective therapeutic strategies.
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Affiliation(s)
- Santosh Kumar
- Department of Molecular Biology, Ariel University, Ariel 40700, Israel
| | - Michael Y Sherman
- Department of Molecular Biology, Ariel University, Ariel 40700, Israel
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6
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Pharmacogenetics Role of Genetic Variants in Immune-Related Factors: A Systematic Review Focusing on mCRC. Pharmaceutics 2022; 14:pharmaceutics14112468. [PMID: 36432658 PMCID: PMC9693433 DOI: 10.3390/pharmaceutics14112468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/03/2022] [Accepted: 11/04/2022] [Indexed: 11/18/2022] Open
Abstract
Pharmacogenetics plays a key role in personalized cancer treatment. Currently, the clinically available pharmacogenetic markers for metastatic colorectal cancer (mCRC) are in genes related to drug metabolism, such as DPYD for fluoropyrimidines and UGT1A1 for irinotecan. Recently, the impact of host variability in inflammatory and immune-response genes on treatment response has gained considerable attention, opening innovative perspectives for optimizing tailored mCRC therapy. A literature review was performed on the predictive role of immune-related germline genetic biomarkers on pharmacological outcomes in patients with mCRC. Particularly, that for efficacy and toxicity was reported and the potential role for clinical management of patients was discussed. Most of the available data regard therapy effectiveness, while the impact on toxicity remains limited. Several studies focused on the effects of polymorphisms in genes related to antibody-dependent cellular cytotoxicity (FCGR2A, FCGR3A) and yielded promising but inconclusive results on cetuximab efficacy. The remaining published data are sparse and mainly hypothesis-generating but suggest potentially interesting topics for future pharmacogenetic studies, including innovative gene-drug interactions in a clinical context. Besides the tumor immune escape pathway, genetic markers belonging to cytokines/interleukins (IL-8 and its receptors) and angiogenic mediators (IGF1) seem to be the best investigated and hopefully most promising to be translated into clinical practice after validation.
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7
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Narendra G, Choudhary S, Raju B, Verma H, Silakari O. Role of Genetic Polymorphisms in Drug-Metabolizing Enzyme-Mediated Toxicity and Pharmacokinetic Resistance to Anti-Cancer Agents: A Review on the Pharmacogenomics Aspect. Clin Pharmacokinet 2022; 61:1495-1517. [PMID: 36180817 DOI: 10.1007/s40262-022-01174-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/17/2022] [Indexed: 01/31/2023]
Abstract
The inter-individual differences in cancer susceptibility are somehow correlated with the genetic differences that are caused by the polymorphisms. These genetic variations in drug-metabolizing enzymes/drug-inactivating enzymes may negatively or positively affect the pharmacokinetic profile of chemotherapeutic agents that eventually lead to pharmacokinetic resistance and toxicity against anti-cancer drugs. For instance, the CYP1B1*3 allele is associated with CYP1B1 overexpression and consequent resistance to a variety of taxanes and platins, while 496T>G is associated with lower levels of dihydropyrimidine dehydrogenase, which results in severe toxicities related to 5-fluorouracil. In this context, a pharmacogenomics approach can be applied to ascertain the role of the genetic make-up in a person's response to any drug. This approach collectively utilizes pharmacology and genomics to develop effective and safe medications that are devoid of resistance problems. In addition, recently reported genomics studies revealed the impact of many single nucleotide polymorphisms in tumors. These studies emphasized the importance of single nucleotide polymorphisms in drug-metabolizing enzymes on the effect of anti-tumor drugs. In this review, we discuss the pharmacogenomics aspect of polymorphisms in detail to provide an insight into the genetic manipulations in drug-metabolizing enzymes that are responsible for pharmacokinetic resistance or toxicity against well-known anti-cancer drugs. Special emphasis is placed on different deleterious single nucleotide polymorphisms and their effect on pharmacokinetic resistance. The information provided in this report may be beneficial to researchers, especially those who are working in the field of biotechnology and human genetics, in rationally manipulating the genetic information of patients with cancer who are undergoing chemotherapy to avoid the problem of pharmacokinetic resistance/toxicity associated with drug-metabolizing enzymes.
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Affiliation(s)
- Gera Narendra
- Molecular Modeling Lab (MML), Department of Pharmaceutical Sciences and Drug Research, Punjabi University, 147002, Patiala, Punjab, India
| | - Shalki Choudhary
- Molecular Modeling Lab (MML), Department of Pharmaceutical Sciences and Drug Research, Punjabi University, 147002, Patiala, Punjab, India
| | - Baddipadige Raju
- Molecular Modeling Lab (MML), Department of Pharmaceutical Sciences and Drug Research, Punjabi University, 147002, Patiala, Punjab, India
| | - Himanshu Verma
- Molecular Modeling Lab (MML), Department of Pharmaceutical Sciences and Drug Research, Punjabi University, 147002, Patiala, Punjab, India
| | - Om Silakari
- Molecular Modeling Lab (MML), Department of Pharmaceutical Sciences and Drug Research, Punjabi University, 147002, Patiala, Punjab, India.
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8
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Abbott K, Salamat JM, Flannery PC, Chaudhury CS, Chandran A, Vishveshwara S, Mani S, Huang J, Tiwari AK, Pondugula SR. Gefitinib Inhibits Rifampicin-Induced CYP3A4 Gene Expression in Human Hepatocytes. ACS OMEGA 2022; 7:34034-34044. [PMID: 36188260 PMCID: PMC9520547 DOI: 10.1021/acsomega.2c03270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 09/02/2022] [Indexed: 06/16/2023]
Abstract
During multidrug combination chemotherapy, activation of the nuclear receptor and the transcription factor human pregnane xenobiotic receptor (hPXR) has been shown to play a role in the development of chemoresistance. Mechanistically, this could occur due to the cancer drug activation of hPXR and the subsequent upregulation of hPXR target genes such as the drug metabolism enzyme, cytochrome P450 3A4 (CYP3A4). In the context of hPXR-mediated drug resistance, hPXR antagonists would be useful adjuncts to PXR-activating chemotherapy. However, there are currently no clinically approved hPXR antagonists in the market. Gefitinib (GEF), a tyrosine kinase inhibitor used for the treatment of advanced non-small-cell lung cancer and effectively used in combinational chemotherapy treatments, is a promising candidate owing to its hPXR ligand-like features. We, therefore, investigated whether GEF would act as an hPXR antagonist when combined with a known hPXR agonist, rifampicin (RIF). At therapeutically relevant concentrations, GEF successfully inhibited the RIF-induced upregulation of endogenous CYP3A4 gene expression in human primary hepatocytes and human hepatocells. Additionally, GEF inhibited the RIF induction of hPXR-mediated CYP3A4 promoter activity in HepG2 human liver carcinoma cells. The computational modeling of molecular docking predicted that GEF could bind to multiple sites on hPXR including the ligand-binding pocket, allowing for potential as a direct antagonist as well as an allosteric inhibitor. Indeed, GEF bound to the ligand-binding domain of the hPXR in cell-free assays, suggesting that GEF directly interacts with the hPXR. Taken together, our results suggest that GEF, at its clinically relevant therapeutic concentration, can antagonize the hPXR agonist-induced CYP3A4 gene expression in human hepatocytes. Thus, GEF could be a potential candidate for use in combinational chemotherapies to combat hPXR agonist-induced chemoresistance. Further studies are warranted to determine whether GEF has sufficient hPXR inhibitor abilities to overcome the hPXR agonist-induced chemoresistance.
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Affiliation(s)
- Kodye
L. Abbott
- Department
of Anatomy, Physiology and Pharmacology, Auburn University, Auburn, Alabama 36849, United States
- Auburn
University Research Initiative in Cancer, Auburn University, Auburn, Alabama 36849, United States
- Salk
Institute for Biological Studies, La Jolla, California 92037, United States
| | - Julia M. Salamat
- Department
of Anatomy, Physiology and Pharmacology, Auburn University, Auburn, Alabama 36849, United States
- Auburn
University Research Initiative in Cancer, Auburn University, Auburn, Alabama 36849, United States
| | - Patrick C. Flannery
- Department
of Anatomy, Physiology and Pharmacology, Auburn University, Auburn, Alabama 36849, United States
- Auburn
University Research Initiative in Cancer, Auburn University, Auburn, Alabama 36849, United States
- Salk
Institute for Biological Studies, La Jolla, California 92037, United States
| | - Chloe S. Chaudhury
- Department
of Anatomy, Physiology and Pharmacology, Auburn University, Auburn, Alabama 36849, United States
- Auburn
University Research Initiative in Cancer, Auburn University, Auburn, Alabama 36849, United States
| | - Aneesh Chandran
- Department
of Biotechnology and Microbiology, Kannur
University, Kannur, Kerala 670661, India
| | | | - Sridhar Mani
- Albert Einstein
Cancer Center, Albert Einstein College of
Medicine, New York 10461, United States
| | - Jianfeng Huang
- Salk
Institute for Biological Studies, La Jolla, California 92037, United States
| | - Amit K. Tiwari
- Center
of Medical Bio-Allied Health Sciences Research, Ajman University, Ajman 306, United Arab Emirates
- Department
of Pharmacology and Experimental Therapeutics, University of Toledo, Toledo, Ohio 43606, United States
- Department
of Cell and Cancer Biology, University of
Toledo, Toledo, Ohio 43614, United
States
| | - Satyanarayana R. Pondugula
- Department
of Anatomy, Physiology and Pharmacology, Auburn University, Auburn, Alabama 36849, United States
- Auburn
University Research Initiative in Cancer, Auburn University, Auburn, Alabama 36849, United States
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Allosteric Antagonism of the Pregnane X Receptor (PXR): Current-State-of-the-Art and Prediction of Novel Allosteric Sites. Cells 2022; 11:cells11192974. [PMID: 36230936 PMCID: PMC9563780 DOI: 10.3390/cells11192974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/20/2022] [Accepted: 09/20/2022] [Indexed: 11/26/2022] Open
Abstract
The pregnane X receptor (PXR, NR1I2) is a xenobiotic-activated transcription factor with high levels of expression in the liver. It not only plays a key role in drug metabolism and elimination, but also promotes tumor growth, drug resistance, and metabolic diseases. It has been proposed as a therapeutic target for type II diabetes, metabolic syndrome, and inflammatory bowel disease, and PXR antagonists have recently been considered as a therapy for colon cancer. There are currently no PXR antagonists that can be used in a clinical setting. Nevertheless, due to the large and complex ligand-binding pocket (LBP) of the PXR, it is challenging to discover PXR antagonists at the orthosteric site. Alternative ligand binding sites of the PXR have also been proposed and are currently being studied. Recently, the AF-2 allosteric binding site of the PXR has been identified, with several compounds modulating the site discovered. Herein, we aimed to summarize our current knowledge of allosteric modulation of the PXR as well as our attempt to unlock novel allosteric sites. We describe the novel binding function 3 (BF-3) site of PXR, which is also common for other nuclear receptors. In addition, we also mention a novel allosteric site III based on in silico prediction. The identified allosteric sites of the PXR provide new insights into the development of safe and efficient allosteric modulators of the PXR receptor. We therefore propose that novel PXR allosteric sites might be promising targets for treating chronic metabolic diseases and some cancers.
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Bignucolo A, Scarabel L, Toffoli G, Cecchin E, De Mattia E. Predicting drug response and toxicity in metastatic colorectal cancer: the role of germline markers. Expert Rev Clin Pharmacol 2022; 15:689-713. [PMID: 35829762 DOI: 10.1080/17512433.2022.2101447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Despite the introduction of targeted agents leading to therapeutic advances, clinical management of patients with metastatic colorectal cancer (mCRC) is still challenged by significant interindividual variability in treatment outcomes, both in terms of toxicity and therapy efficacy. The study of germline genetic variants could help to personalize and optimize therapeutic approaches in mCRC. AREAS COVERED A systematic review of pharmacogenetic studies in mCRC patients published on PubMed between 2011 and 2021, evaluating the role of germline variants as predictive markers of toxicity and efficacy of drugs currently approved for treatment of mCRC, was perfomed. EXPERT OPINION Despite the large amount of pharmacogenetic data published to date, only a few genetic markers (i.e., DPYD and UGT1A1 variants) reached the clinical practice, mainly to prevent the toxic effects of chemotherapy. The large heterogeneity of available studies represents the major limitation in comparing results and identifying potential markers for clinical use, the role of which remains exploratory in most cases. However, the available published findings are an important starting point for future investigations. They highlighted new promising pharmacogenetic markers within the network of inflammatory and immune response signaling. In addition, the emerging role of previously overlooked rare variants has been pointed out.
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Affiliation(s)
- Alessia Bignucolo
- Experimental and Clinical Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Via Franco Gallini 2, 33081 Aviano (PN), Italy
| | - Lucia Scarabel
- Experimental and Clinical Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Via Franco Gallini 2, 33081 Aviano (PN), Italy
| | - Giuseppe Toffoli
- Experimental and Clinical Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Via Franco Gallini 2, 33081 Aviano (PN), Italy
| | - Erika Cecchin
- Experimental and Clinical Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Via Franco Gallini 2, 33081 Aviano (PN), Italy
| | - Elena De Mattia
- Experimental and Clinical Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Via Franco Gallini 2, 33081 Aviano (PN), Italy
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Ozawa S, Miura T, Terashima J, Habano W. Cellular irinotecan resistance in colorectal cancer and overcoming irinotecan refractoriness through various combination trials including DNA methyltransferase inhibitors: a review. CANCER DRUG RESISTANCE (ALHAMBRA, CALIF.) 2022; 4:946-964. [PMID: 35582377 PMCID: PMC8992440 DOI: 10.20517/cdr.2021.82] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/27/2021] [Accepted: 10/26/2021] [Indexed: 12/28/2022]
Abstract
Treatment with pharmacological drugs for colorectal cancer (CRC) remains unsatisfactory. A major cause of failure in pharmacotherapy is the resistance of colon cancer cells to the drugs, creating an urgent issue. In this review, we summarize previous studies on the resistance of CRC cells to irinotecan and discuss possible reasons for refractoriness. Our review presents the following five major causes of irinotecan resistance in human CRC: (1) cellular irinotecan resistance is induced mainly through the increased expression of the drug efflux transporter, ABCG2; (2) cellular irinotecan resistance is also induced in association with a nuclear receptor, pregnane/steroid X receptor (PXR/SXR), which is enriched in the CYP3A4 gene enhancer region in CRC cells by exposing the cells to SN-38; (3) irinotecan-resistant cells possess either reduced DNA topoisomerase I (Top1) expression at both the mRNA and protein levels or Top1 missense mutations; (4) alterations in the tumor microenvironment lead to drug resistance through intercellular vesicle-mediated transmission of miRNAs; and (5) CRC stem cells are the most difficult targets to successfully treat CRC. In the clinical setting, CRC gradually develops resistance to initially effective irinotecan-based therapy. To solve this problem, several clinical trials, such as irinotecan plus cetuximab vs. cetuximab monotherapy, have been conducted. Another clinical trial on irinotecan plus guadecitabine, a DNA-methyltransferase inhibitor, has also been conducted.
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Affiliation(s)
- Shogo Ozawa
- Division of Pharmacodynamics and Molecular Genetics, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Toshitaka Miura
- Division of Pharmacodynamics and Molecular Genetics, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Jun Terashima
- Division of Pharmacodynamics and Molecular Genetics, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Wataru Habano
- Division of Pharmacodynamics and Molecular Genetics, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
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12
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Niu X, Wu T, Li G, Gu X, Tian Y, Cui H. Insights into the critical role of the PXR in preventing carcinogenesis and chemotherapeutic drug resistance. Int J Biol Sci 2022; 18:742-759. [PMID: 35002522 PMCID: PMC8741843 DOI: 10.7150/ijbs.68724] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 11/21/2021] [Indexed: 12/12/2022] Open
Abstract
Pregnane x receptor (PXR) as a nuclear receptor is well-established in drug metabolism, however, it has pleiotropic functions in regulating inflammatory responses, glucose metabolism, and protects normal cells against carcinogenesis. Most studies focus on its transcriptional regulation, however, PXR can regulate gene expression at the translational level. Emerging evidences have shown that PXR has a broad protein-protein interaction network, by which is implicated in the cross signaling pathways. Furthermore, the interactions between PXR and some critical proteins (e.g., p53, Tip60, p300/CBP-associated factor) in DNA damage pathway highlight its potential roles in this field. A thorough understanding of how PXR maintains genome stability and prevents carcinogenesis will help clinical diagnosis and finally benefit patients. Meanwhile, due to the regulation of CYP450 enzymes CYP3A4 and multidrug resistance protein 1 (MDR1), PXR contributes to chemotherapeutic drug resistance. It is worthy of note that the co-factor of PXR such as RXRα, also has contributions to this process, which makes the PXR-mediated drug resistance more complicated. Although single nucleotide polymorphisms (SNPs) vary between individuals, the amino acid substitution on exon of PXR finally affects PXR transcriptional activity. In this review, we have summarized the updated mechanisms that PXR protects the human body against carcinogenesis, and major contributions of PXR with its co-factors have made on multidrug resistance. Furthermore, we have also reviewed the current promising antagonist and their clinic applications in reversing chemoresistance. We believe our review will bring insight into PXR-targeted cancer therapy, enlighten the future study direction, and provide substantial evidence for the clinic in future.
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Affiliation(s)
- Xiaxia Niu
- Institute of Toxicology, School of Public Health, Lanzhou University, 730000, Lanzhou, China
| | - Ting Wu
- Institute of Toxicology, School of Public Health, Lanzhou University, 730000, Lanzhou, China
| | - Gege Li
- Institute of Toxicology, School of Public Health, Lanzhou University, 730000, Lanzhou, China
| | - Xinsheng Gu
- Department of Pharmacology, College of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, Hubei, China
| | - Yanan Tian
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, USA
| | - Hongmei Cui
- Institute of Toxicology, School of Public Health, Lanzhou University, 730000, Lanzhou, China
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13
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High Pregnane X Receptor (PXR) Expression Is Correlated with Poor Prognosis in Invasive Breast Carcinoma. Diagnostics (Basel) 2021; 11:diagnostics11111946. [PMID: 34829293 PMCID: PMC8624096 DOI: 10.3390/diagnostics11111946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/12/2021] [Accepted: 10/15/2021] [Indexed: 11/16/2022] Open
Abstract
Pregnane X Receptor (PXR) is involved in human cancer, either by directly affecting carcinogenesis or by inducing drug-drug interactions and chemotherapy resistance. The clinical significance of PXR expression in invasive breast carcinoma was evaluated in the present study. PXR protein expression was assessed immunohistochemically on formalin fixed paraffin-embedded breast invasive carcinoma tissue sections, obtained from 148 patients, and was correlated with clinicopathological parameters, molecular phenotypes, tumor cells' proliferative capacity, and overall disease-free patients' survival. Additionally, the expression of PXR was examined on human breast carcinoma cell lines of different histological grade, hormonal status, and metastatic potential. PXR positivity was noted in 79 (53.4%) and high PXR expression in 48 (32.4%), out of 148 breast carcinoma cases. High PXR expression was positively associated with nuclear grade (p = 0.0112) and histological grade of differentiation (p = 0.0305), as well as with tumor cells' proliferative capacity (p = 0.0051), and negatively with luminal A subtype (p = 0.0295). Associations between high PXR expression, estrogen, and progesterone receptor negative status were also recorded (p = 0.0314 and p = 0.0208, respectively). High PXR expression was associated with shorter overall patients' survival times (log-rank test, p = 0.0009). In multivariate analysis, high PXR expression was identified as an independent prognostic factor of overall patients' survival (Cox-regression analysis, p = 0.0082). PXR expression alterations were also noted in breast cancer cell lines of different hormonal status. The present data supported evidence that PXR was related to a more aggressive invasive breast carcinoma phenotype, being a strong and independent poor prognosticator.
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14
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Li Y, Lin W, Wright WC, Chai SC, Wu J, Chen T. Building a Chemical Toolbox for Human Pregnane X Receptor Research: Discovery of Agonists, Inverse Agonists, and Antagonists Among Analogs Based on the Unique Chemical Scaffold of SPA70. J Med Chem 2021; 64:1733-1761. [PMID: 33497575 DOI: 10.1021/acs.jmedchem.0c02201] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Pregnane X receptor (PXR) plays roles in detoxification and other physiological processes. PXR activation may enhance drug metabolism (leading to adverse drug reactions) or inhibit inflammation. Therefore, PXR agonists, antagonists, and inverse agonists may serve as research tools and drug candidates. However, a specific PXR modulator with an associated structure-activity relationship is lacking. Based on the scaffold of specific human PXR (hPXR) antagonist SPA70 (10), we developed 81 SPA70 analogs and evaluated their receptor-binding and cellular activities. Interestingly, analogs with subtle structural differences displayed divergent cellular activities, including agonistic, dual inverse agonistic and antagonistic, antagonistic, and partial agonistic/partial antagonistic activities (as in compounds 111, 10, 97, and 42, respectively). We generated a pharmacophore model that represents 81 SPA70 analogs, and docking models that correlate strong interactions between the compounds and residues in the AF-2 helix with agonistic activity. These compounds are novel chemical tools for studying hPXR.
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Affiliation(s)
- Yongtao Li
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, United States
| | - Wenwei Lin
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, United States
| | - William C Wright
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, United States
| | - Sergio C Chai
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, United States
| | - Jing Wu
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, United States
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, United States
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15
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Matsunaga T, Okumura N, Saito H, Morikawa Y, Suenami K, Hisamatsu A, Endo S, Ikari A. Significance of aldo-keto reductase 1C3 and ATP-binding cassette transporter B1 in gain of irinotecan resistance in colon cancer cells. Chem Biol Interact 2020; 332:109295. [PMID: 33096057 DOI: 10.1016/j.cbi.2020.109295] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/08/2020] [Accepted: 10/19/2020] [Indexed: 11/29/2022]
Abstract
Irinotecan (CPT11) is widely prescribed for treatment of various intractable cancers such as advanced and metastatic colon cancer cells, but its continuous treatment promotes the resistance development. In this study, we established CPT11-resistant variants of three human colon cancer (DLD1, RKO and LoVo) cell lines, and found that gain of the resistance elicited an up-regulation of aldo-keto reductase (AKR) 1C3 in the cells. Additionally, the sensitivity to CPT11 toxicity was decreased and increased by overexpression and knockdown, respectively, of the enzyme. Moreover, the resistant cells suppressed formation of reactive 4-hydroxy-2-nonenal by CPT11 treatment, and the suppressive effect was almost completely abolished by addition of an AKR1C3 inhibitor. These results suggest that up-regulated AKR1C3 contributes to promotion of the chemoresistance by detoxifying the reactive aldehyde. Western blot and real-time polymerase-chain reaction analyses and ATP-binding cassette (ABC) B1-functional assay revealed that, among three ABC transporters, ABCB1 was the most highly up-regulated by development of the CPT11 resistance, inferring a significant contribution of pregnane-X receptor-dependent signaling to the ABCB1 up-regulation. The combined treatment with inhibitors of AKR1C3 and ABCB1 potently sensitized the resistant cells to CPT11 and its active metabolite SN38. Taken together, our results suggest that combination of AKR1C3 and ABCB1 inhibitors is effective as adjuvant therapy to enhance CPT11 sensitivity of intractable colon cancer cells.
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Affiliation(s)
- Toshiyuki Matsunaga
- Education Center of Green Pharmaceutical Sciences, Gifu Pharmaceutical University, Gifu, 502-8585, Japan.
| | - Naoko Okumura
- Laboratory of Biochemistry, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
| | - Haruhi Saito
- Laboratory of Biochemistry, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
| | - Yoshifumi Morikawa
- Forensic Science Laboratory, Gifu Prefectural Police Headquarters, Gifu, 500-8501, Japan
| | - Koichi Suenami
- Forensic Science Laboratory, Gifu Prefectural Police Headquarters, Gifu, 500-8501, Japan
| | - Aki Hisamatsu
- Education Center of Green Pharmaceutical Sciences, Gifu Pharmaceutical University, Gifu, 502-8585, Japan
| | - Satoshi Endo
- Laboratory of Biochemistry, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
| | - Akira Ikari
- Laboratory of Biochemistry, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
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16
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Emerging roles for UDP-glucuronosyltransferases in drug resistance and cancer progression. Br J Cancer 2020; 122:1277-1287. [PMID: 32047295 PMCID: PMC7188667 DOI: 10.1038/s41416-019-0722-0] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 12/06/2019] [Accepted: 12/17/2019] [Indexed: 12/12/2022] Open
Abstract
The best-known role of UDP-glucuronosyltransferase enzymes (UGTs) in cancer is the metabolic inactivation of drug therapies. By conjugating glucuronic acid to lipophilic drugs, UGTs impair the biological activity and enhance the water solubility of these agents, driving their elimination. Multiple clinical observations support an expanding role for UGTs as modulators of the drug response and in mediating drug resistance in numerous cancer types. However, accumulating evidence also suggests an influence of the UGT pathway on cancer progression. Dysregulation of the expression and activity of UGTs has been associated with the progression of several cancers, arguing for UGTs as possible mediators of oncogenic pathways and/or disease accelerators in a drug-naive context. The consequences of altered UGT activity on tumour biology are incompletely understood. They might be associated with perturbed levels of bioactive endogenous metabolites such as steroids and bioactive lipids that are inactivated by UGTs or through non-enzymatic mechanisms, thereby eliciting oncogenic signalling cascades. This review highlights the evidence supporting dual roles for the UGT pathway, affecting cancer progression and drug resistance. Pharmacogenomic testing of UGT profiles in patients and the development of therapeutic options that impair UGT actions could provide useful prognostic and predictive biomarkers and enhance the efficacy of anti-cancer drugs.
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17
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Chai SC, Wright WC, Chen T. Strategies for developing pregnane X receptor antagonists: Implications from metabolism to cancer. Med Res Rev 2019; 40:1061-1083. [PMID: 31782213 DOI: 10.1002/med.21648] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 10/24/2019] [Accepted: 11/19/2019] [Indexed: 12/11/2022]
Abstract
Pregnane X receptor (PXR) is a ligand-activated nuclear receptor (NR) that was originally identified as a master regulator of xenobiotic detoxification. It regulates the expression of drug-metabolizing enzymes and transporters to control the degradation and excretion of endobiotics and xenobiotics, including therapeutic agents. The metabolism and disposition of drugs might compromise their efficacy and possibly cause drug toxicity and/or drug resistance. Because many drugs can promiscuously bind and activate PXR, PXR antagonists might have therapeutic value in preventing and overcoming drug-induced PXR-mediated drug toxicity and drug resistance. Furthermore, PXR is now known to have broader cellular functions, including the regulation of cell proliferation, and glucose and lipid metabolism. Thus, PXR might be involved in human diseases such as cancer and metabolic diseases. The importance of PXR antagonists is discussed in the context of the role of PXR in xenobiotic sensing and other disease-related pathways. This review focuses on the development of PXR antagonists, which has been hampered by the promiscuity of PXR ligand binding. However, substantial progress has been made in recent years, suggesting that it is feasible to develop selective PXR antagonists. We discuss the current status, challenges, and strategies in developing selective PXR antagonists. The strategies are based on the molecular mechanisms of antagonism in related NRs that can be applied to the design of PXR antagonists, primarily driven by structural information.
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Affiliation(s)
- Sergio C Chai
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, Memphis, Tennessee
| | - William C Wright
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, Memphis, Tennessee.,Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, Memphis, Tennessee.,Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, Tennessee
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18
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De Mattia E, Polesel J, Roncato R, Labriet A, Bignucolo A, Dreussi E, Romanato L, Guardascione M, Buonadonna A, D'Andrea M, Lévesque E, Jonker D, Couture F, Guillemette C, Cecchin E, Toffoli G. Germline Polymorphisms in the Nuclear Receptors PXR and VDR as Novel Prognostic Markers in Metastatic Colorectal Cancer Patients Treated With FOLFIRI. Front Oncol 2019; 9:1312. [PMID: 31850208 PMCID: PMC6901926 DOI: 10.3389/fonc.2019.01312] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 11/11/2019] [Indexed: 12/16/2022] Open
Abstract
Nuclear receptors act as mediators of cancer-related inflammation and gene expression. They have a regulatory effect on genes encoding proteins related to drug adsorption, distribution, metabolism, and excretion. The aim of the present study was to highlight novel prognostic markers among polymorphisms in genes encoding for nuclear receptor proteins and inflammation-related cytokines in patients treated with a FOLFIRI regimen. This study included two independent cohorts comprising a total of 337 mCRC patients homogeneously treated with first-line FOLFIRI. Genotyping of 246 haplotype-tagging polymorphisms in 22 genes was performed using bead array technology. The NR1I2 (PXR)-rs1054190 and VDR-rs7299460 polymorphisms were significantly associated with patient overall survival (OS). A detrimental effect of the NR1I2 rs1054190-TT genotype on OS was observed in both the discovery and replication cohorts (HR = 6.84, P = 0.0021, q-value = 0.1278 and HR = 3.56, P = 0.0414, respectively). Patients harboring the NR1I2 rs1054190-TT genotype had a median OS of 9 months vs. 21 months in patients with C-allele (P < 0.0001 log-rank test). VDR rs7299460-T was consistently associated with a longer OS in both cohorts (discovery: HR = 0.61, P = 0.0075, q-value = 0.1535; replication: HR = 0.57, P = 0.0477). Patients with the VDR rs7299460-T allele had a median OS of 23 months compared to 18 months in those with the CC genotype (P = 0.0489, log-rank test). The NR1I2-rs1054190 polymorphism also had an effect on the duration of progression-free survival, consistent with the effect observed on OS. Two novel prognostic markers for mCRC treated with FOLFIRI were described and, if validated by prospective trials, have a potential application in the management of these patients.
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Affiliation(s)
- Elena De Mattia
- Clinical and Experimental Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Jerry Polesel
- Unit of Cancer Epidemiology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Rossana Roncato
- Clinical and Experimental Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Adrien Labriet
- Pharmacogenomics Laboratory, Centre Hospitalier Universitaire de Québec (CHU de Québec) Research Center and Faculty of Pharmacy, Laval University, Quebec City, QC, Canada
| | - Alessia Bignucolo
- Clinical and Experimental Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Eva Dreussi
- Clinical and Experimental Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Loredana Romanato
- Clinical and Experimental Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Michela Guardascione
- Clinical and Experimental Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Angela Buonadonna
- Medical Oncology Unit, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Mario D'Andrea
- Medical Oncology Unit, "San Filippo Neri Hospital", Rome, Italy
| | - Eric Lévesque
- CHU de Québec Research Center and Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Derek Jonker
- Division of Medical Oncology, Department of Medicine, Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada
| | - Félix Couture
- CHU de Québec Research Center and Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Chantal Guillemette
- Pharmacogenomics Laboratory, Centre Hospitalier Universitaire de Québec (CHU de Québec) Research Center and Faculty of Pharmacy, Laval University, Quebec City, QC, Canada
| | - Erika Cecchin
- Clinical and Experimental Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Giuseppe Toffoli
- Clinical and Experimental Pharmacology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
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19
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Carazo A, Mladěnka P, Pávek P. Marine Ligands of the Pregnane X Receptor (PXR): An Overview. Mar Drugs 2019; 17:md17100554. [PMID: 31569349 PMCID: PMC6836225 DOI: 10.3390/md17100554] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 09/27/2019] [Accepted: 09/27/2019] [Indexed: 02/06/2023] Open
Abstract
Pregnane X Receptor (PXR) is a ligand-activated transcription factor which binds many structurally different molecules. The receptor is able to regulate the expression of a wide array of genes and is involved in cancer and different key physiological processes such as the metabolism of drugs/xenobiotics and endogenous compounds including lipids and carbohydrates, and inflammation. Algae, sponges, sea squirts, and other marine organisms are some of the species from which structurally new molecules have been isolated that have been subsequently identified in recent decades as ligands for PXR. The therapeutic potential of these natural compounds is promising in different areas and has recently resulted in the registration of trabectedin by the FDA as a novel antineoplastic drug. Apart from being potentially novel drugs, these compounds can also serve as models for the development of new molecules with improved activity. The aim of this review is to succinctly summarize the currently known natural molecules isolated from marine organisms with a proven ability to interact with PXR.
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Affiliation(s)
- Alejandro Carazo
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic.
| | - Přemysl Mladěnka
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic.
| | - Petr Pávek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic.
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20
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Cecchin E, De Mattia E, Ecca F, Toffoli G. Host genetic profiling to increase drug safety in colorectal cancer from discovery to implementation. Drug Resist Updat 2018; 39:18-40. [PMID: 30075835 DOI: 10.1016/j.drup.2018.07.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 06/11/2018] [Accepted: 07/06/2018] [Indexed: 02/07/2023]
Abstract
Adverse events affect the pharmacological treatment of approximately 90% of colorectal cancer (CRC) patients at any stage of the disease. Chemotherapy including fluoropyrimidines, irinotecan, and oxaliplatin is the cornerstone of the pharmacological treatment of CRC. The introduction of novel targeted agents, as anti-EGFR (i.e. cetuximab, panitumumab) and antiangiogenic (i.e. bevacizumab, ziv-aflibercept, regorafenib, and ramucirumab) molecules, into the oncologist's toolbox has led to significant improvements in the life expectancy of advanced CRC patients, but with a substantial increase in toxicity burden. In this respect, pharmacogenomics has largely been applied to the personalization of CRC chemotherapy, focusing mainly on the study of inhered polymorphisms in genes encoding phase I and II enzymes, ATP-binding cassette (ABC)/solute carrier (SLC) membrane transporters, proteins involved in DNA repair, folate pathway and immune response. These research efforts have led to the identification of some validated genetic markers of chemotherapy toxicity, for fluoropyrimidines and irinotecan. No validated genetic determinants of oxaliplatin-specific toxicity, as peripheral neuropathy, has thus far been established. The contribution of host genetic markers in predicting the toxicity associated with novel targeted agents' administration is still controversial due to the heterogeneity of published data. Pharmacogenomics guidelines have been published by some international scientific consortia such as the Clinical Pharmacogenomics Implementation Consortium (CPIC) and the Dutch Pharmacogenetics Working Group (DPWG) strongly suggesting a pre-treatment dose adjustment of irinotecan based on UGT1A1*28 genotype and of fluoropyrimidines based on some DPYD genetic variants, to increase treatment safety. However, these recommendations are still poorly applied at the patient's bedside. Several ongoing projects in the U.S. and Europe are currently evaluating how pharmacogenomics can be implemented successfully in daily clinical practice. The majority of drug-related adverse events are still unexplained, and a great deal of ongoing research is aimed at improving knowledge of the role of pharmacogenomics in increasing treatment safety. In this review, the issue of pre-treatment identification of CRC patients at risk of toxicity via the analysis of patients' genetic profiles is addressed. Available pharmacogenomics guidelines with ongoing efforts to implement them in clinical practice and new exploratory markers for clinical validation are described.
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Affiliation(s)
- Erika Cecchin
- Experimental and Clinical Pharmacology Unit, Centro di Riferimento Oncologico - National Cancer Institute, 33081 Aviano, Italy
| | - Elena De Mattia
- Experimental and Clinical Pharmacology Unit, Centro di Riferimento Oncologico - National Cancer Institute, 33081 Aviano, Italy
| | - Fabrizio Ecca
- Experimental and Clinical Pharmacology Unit, Centro di Riferimento Oncologico - National Cancer Institute, 33081 Aviano, Italy
| | - Giuseppe Toffoli
- Experimental and Clinical Pharmacology Unit, Centro di Riferimento Oncologico - National Cancer Institute, 33081 Aviano, Italy.
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21
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Liu X, Flinders C, Mumenthaler SM, Hummon AB. MALDI Mass Spectrometry Imaging for Evaluation of Therapeutics in Colorectal Tumor Organoids. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:516-526. [PMID: 29209911 PMCID: PMC5839975 DOI: 10.1007/s13361-017-1851-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/16/2017] [Accepted: 11/13/2017] [Indexed: 05/03/2023]
Abstract
Patient-derived colorectal tumor organoids (CTOs) closely recapitulate the complex morphological, phenotypic, and genetic features observed in in vivo tumors. Therefore, evaluation of drug distribution and metabolism in this model system can provide valuable information to predict the clinical outcome of a therapeutic response in individual patients. In this report, we applied matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) to examine the spatial distribution of the drug irinotecan and its metabolites in CTOs from two patients. Irinotecan is a prodrug and is often prescribed as part of therapeutic regimes for patients with advanced colorectal cancer. Irinotecan shows a time-dependent and concentration-dependent permeability and metabolism in the CTOs. More interestingly, the active metabolite SN-38 does not co-localize well with the parent drug irinotecan and the inactive metabolite SN-38G. The phenotypic effect of irinotecan metabolism was also confirmed by a viability study showing significantly reduced proliferation in the drug treated CTOs. MALDI-MSI can be used to investigate various pharmaceutical compounds in CTOs derived from different patients. By analyzing multiple CTOs from a patient, this method could be used to predict patient-specific drug responses and help to improve personalized dosing regimens. Graphical Abstract ᅟ.
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Affiliation(s)
- Xin Liu
- Department of Chemistry and Biochemistry and the Harper Cancer Research Institute, University of Notre Dame, 140 McCourtney Hall, Notre Dame, IN, 46556, USA
| | - Colin Flinders
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, 2250 Alcazar Street, CSC 240, Los Angeles, CA, 90033, USA
| | - Shannon M Mumenthaler
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, 2250 Alcazar Street, CSC 240, Los Angeles, CA, 90033, USA
| | - Amanda B Hummon
- Department of Chemistry and Biochemistry and the Harper Cancer Research Institute, University of Notre Dame, 140 McCourtney Hall, Notre Dame, IN, 46556, USA.
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22
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Planque C, Rajabi F, Grillet F, Finetti P, Bertucci F, Gironella M, Lozano JJ, Beucher B, Giraud J, Garambois V, Vincent C, Brown D, Caillo L, Kantar J, Pelegrin A, Prudhomme M, Ripoche J, Bourgaux JF, Ginestier C, Castells A, Hollande F, Pannequin J, Pascussi JM. Pregnane X-receptor promotes stem cell-mediated colon cancer relapse. Oncotarget 2018; 7:56558-56573. [PMID: 27448961 PMCID: PMC5302934 DOI: 10.18632/oncotarget.10646] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 05/29/2016] [Indexed: 12/17/2022] Open
Abstract
Colorectal cancer lethality usually results from post-treatment relapse in the majority of stage II-IV patients, due to the enhanced resistance of Cancer Stem Cells (CSCs). Here, we show that the nuclear receptor Pregnane X Receptor (PXR, NR1I2), behaves as a key driver of CSC-mediated tumor recurrence. First, PXR is specifically expressed in CSCs, where it drives the expression of genes involved in self-renewal and chemoresistance. Clinically, high levels of PXR correlate with poor recurrence-free survival in a cohort of >200 stage II/III colorectal cancer patients treated with chemotherapy, for whom finding biomarkers of treatment outcome is an urgent clinical need. shRNA silencing of PXR increased the chemo-sensitivity of human colon CSCs, reduced their self-renewal and tumor-initiating potential, and drastically delayed tumor recurrence in mice following chemotherapy. This study uncovers PXR as a key factor for CSC self-renewal and chemoresistance and targeting PXR thus represents a promising strategy to minimize colorectal cancer relapse by selectively sensitizing CSCs to chemotherapy.
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Affiliation(s)
- Chris Planque
- CNRS UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France.,INSERM U1191, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Fatemeh Rajabi
- CNRS UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France.,INSERM U1191, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Fanny Grillet
- CNRS UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France.,INSERM U1191, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Pascal Finetti
- Centre de Recherche en Cancérologie de Marseille, INSERM UMR1068, CNRS UMR725, Marseille, France
| | - François Bertucci
- Centre de Recherche en Cancérologie de Marseille, INSERM UMR1068, CNRS UMR725, Marseille, France
| | - Meritxell Gironella
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Institut d'Investigaciones Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Juan José Lozano
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Institut d'Investigaciones Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Bertrand Beucher
- CNRS UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France.,INSERM U1191, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Julie Giraud
- CNRS UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France.,INSERM U1191, Montpellier, France.,Université Montpellier, Montpellier, France
| | | | - Charles Vincent
- Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
| | - Daniel Brown
- Department of Pathology, University of Melbourne, Parkville, Australia
| | - Ludovic Caillo
- CNRS UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France.,INSERM U1191, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Jovana Kantar
- Laboratoire de Biochimie, CHU Carémeau, Nîmes, France
| | - André Pelegrin
- Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
| | | | | | | | - Christophe Ginestier
- Centre de Recherche en Cancérologie de Marseille, U1068 Inserm, Marseille, France
| | - Antoni Castells
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Institut d'Investigaciones Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Frédéric Hollande
- CNRS UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France.,INSERM U1191, Montpellier, France.,Université Montpellier, Montpellier, France.,Department of Pathology, University of Melbourne, Parkville, Australia
| | - Julie Pannequin
- CNRS UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France.,INSERM U1191, Montpellier, France.,Université Montpellier, Montpellier, France
| | - Jean Marc Pascussi
- CNRS UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France.,INSERM U1191, Montpellier, France.,Université Montpellier, Montpellier, France
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23
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Terminating the criminal collaboration in pancreatic cancer: Nanoparticle-based synergistic therapy for overcoming fibroblast-induced drug resistance. Biomaterials 2017; 144:105-118. [PMID: 28837958 DOI: 10.1016/j.biomaterials.2017.08.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 07/26/2017] [Accepted: 08/02/2017] [Indexed: 12/18/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a lethal cancer with a dismal overall prognosis mainly unchanged over the past decades. PDAC is generally refractory to conventional treatments, and thus novel therapies are urgently needed. Recently, accumulating evidence has indicated that human pancreatic stellate cells (PSCs) facilitate PDAC development and drug resistance through paracrine activation of hedgehog pathway. Here, we report that smart SN38 (active metabolite of irinotecan) polymeric prodrug-based nanoparticles effectively encapsulate the commercial hedgehog pathway inhibitor GDC-0449 for co-delivery. More intriguingly, we obtained size-tunable nanoparticles with increased GDC-0449 loading efficiency by simply extending the chain length of the hydrophobic SN38 block. To better evaluate the efficacy and investigate the synergistic mechanisms, we immortalized human PSCs and established fibroblast-containing models in vitro and in vivo. In PSCs, BxPC-3 cells and MIA PaCa-2 cells, GDC-0449 suppressed the co-culture induced up-regulations of the two drug resistance contributors: sonic hedgehog transcription factor glioma-associated protein1 (GLI-1) and UGT1A glucuronosyltransferase. Importantly, the nanoparticle-mediated co-delivery system exhibited potent antitumor efficacy with enhanced apoptosis and reduced collagen, α-SMA and GLI-1 expression in tumor tissues. These findings reveal a potential strategy to utilize nanoparticle-mediated drug co-delivery platform as an effective combination therapy for fibroblast-enriched PDAC.
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24
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Del Rio M, Mollevi C, Bibeau F, Vie N, Selves J, Emile JF, Roger P, Gongora C, Robert J, Tubiana-Mathieu N, Ychou M, Martineau P. Molecular subtypes of metastatic colorectal cancer are associated with patient response to irinotecan-based therapies. Eur J Cancer 2017; 76:68-75. [PMID: 28284171 DOI: 10.1016/j.ejca.2017.02.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 01/21/2017] [Accepted: 02/01/2017] [Indexed: 01/15/2023]
Abstract
BACKGROUND Currently, metastatic colorectal cancer is treated as a homogeneous disease and only RAS mutational status has been approved as a negative predictive factor in patients treated with cetuximab. The aim of this study was to evaluate if recently identified molecular subtypes of colon cancer are associated with response of metastatic patients to first-line therapy. PATIENTS AND METHODS We collected and analysed 143 samples of human colorectal tumours with complete clinical annotations, including the response to treatment. Gene expression profiling was used to classify patients in three to six classes using four different molecular classifications. Correlations between molecular subtypes, response to treatment, progression-free and overall survival were analysed. RESULTS We first demonstrated that the four previously described molecular classifications of colorectal cancer defined in non-metastatic patients also correctly classify stage IV patients. One of the classifications is strongly associated with response to FOLFIRI (P=0.003), but not to FOLFOX (P=0.911) and FOLFIRI + Bevacizumab (P=0.190). In particular, we identify a molecular subtype representing 28% of the patients that shows an exceptionally high response rate to FOLFIRI (87.5%). These patients have a two-fold longer overall survival (40.1 months) when treated with FOLFIRI, as first-line regimen, instead of FOLFOX (18.6 months). CONCLUSIONS Our results demonstrate the interest of molecular classifications to develop tailored therapies for patients with metastatic colorectal cancer and a strong impact of the first-line regimen on the overall survival of some patients. This however remains to be confirmed in a large prospective clinical trial.
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Affiliation(s)
- M Del Rio
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, F-34298, France; INSERM, U1194, Montpellier, F-34298, France; Université de Montpellier, Montpellier, F-34090, France; Institut régional du Cancer de Montpellier, Montpellier, F-34298, France
| | - C Mollevi
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, F-34298, France; INSERM, U1194, Montpellier, F-34298, France; Université de Montpellier, Montpellier, F-34090, France; Institut régional du Cancer de Montpellier, Montpellier, F-34298, France
| | - F Bibeau
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, F-34298, France; INSERM, U1194, Montpellier, F-34298, France; Université de Montpellier, Montpellier, F-34090, France; Institut régional du Cancer de Montpellier, Montpellier, F-34298, France
| | - N Vie
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, F-34298, France; INSERM, U1194, Montpellier, F-34298, France; Université de Montpellier, Montpellier, F-34090, France; Institut régional du Cancer de Montpellier, Montpellier, F-34298, France
| | - J Selves
- Centre Hospitalier Universitaire de Toulouse, F-31300, France; Centre de Recherche en Cancérologie de Toulouse, Unité Mixte de Recherche 1037 INSERM - Université Toulouse III, France
| | - J-F Emile
- Université de Versailles, Boulogne, France; Hôpital Ambroise Paré, Boulogne, France
| | - P Roger
- Université de Montpellier, Montpellier, F-34090, France; Service d'Anatomie et Cytologie Pathologiques, CHU Nîmes, Place du Professeur Debré, 30029, Nîmes, France
| | - C Gongora
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, F-34298, France; INSERM, U1194, Montpellier, F-34298, France; Université de Montpellier, Montpellier, F-34090, France; Institut régional du Cancer de Montpellier, Montpellier, F-34298, France
| | - J Robert
- INSERM U916, Institut Bergonié, Université de Bordeaux, France
| | - N Tubiana-Mathieu
- Service d'oncologie médicale, CHU Dupuytren, avenue Luther-King, 87000, Limoges, France
| | - M Ychou
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, F-34298, France; INSERM, U1194, Montpellier, F-34298, France; Université de Montpellier, Montpellier, F-34090, France; Institut régional du Cancer de Montpellier, Montpellier, F-34298, France
| | - P Martineau
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, F-34298, France; INSERM, U1194, Montpellier, F-34298, France; Université de Montpellier, Montpellier, F-34090, France; Institut régional du Cancer de Montpellier, Montpellier, F-34298, France.
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25
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Lolodi O, Wang YM, Wright WC, Chen T. Differential Regulation of CYP3A4 and CYP3A5 and its Implication in Drug Discovery. Curr Drug Metab 2017; 18:1095-1105. [PMID: 28558634 PMCID: PMC5709240 DOI: 10.2174/1389200218666170531112038] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/29/2017] [Accepted: 05/08/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND Cancer cells use several mechanisms to resist the cytotoxic effects of drugs, resulting in tumor progression and invasion. One such mechanism capitalizes on the body's natural defense against xenobiotics by increasing the rate of xenobiotic efflux and metabolic inactivation. Xenobiotic metabolism typically involves conversion of parent molecules to more soluble and easily excreted derivatives in reactions catalyzed by Phase I and Phase II drug metabolizing enzymes. METHODS We performed a structured search of peer-reviewed literature on P450 (CYP) 3A, with a focus on CYP3A4 and CYP3A5. RESULTS Recent reports indicate that components of the xenobiotic response system are upregulated in some diseases, including many cancers. Such components include the pregnane X receptor (PXR), CYP3A4 and CYP3A5 enzymes. The CYP3A enzymes are a subset of the numerous enzymes that are transcriptionally activated following the interaction of PXR and many ligands. CONCLUSION Intense research is ongoing to understand the functional ramifications of aberrant expression of these components in diseased states with the goal of designing novel drugs that can selectively target them.
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Affiliation(s)
- Ogheneochukome Lolodi
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - Yue-Ming Wang
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - William C. Wright
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
- Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
- Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, Tennessee, USA
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26
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Kotiya D, Jaiswal B, Ghose S, Kaul R, Datta K, Tyagi RK. Role of PXR in Hepatic Cancer: Its Influences on Liver Detoxification Capacity and Cancer Progression. PLoS One 2016; 11:e0164087. [PMID: 27760163 PMCID: PMC5070842 DOI: 10.1371/journal.pone.0164087] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 09/19/2016] [Indexed: 01/22/2023] Open
Abstract
The role of nuclear receptor PXR in detoxification and clearance of xenobiotics and endobiotics is well-established. However, its projected role in hepatic cancer is rather illusive where its expression is reported altered in different cancers depending on the tissue-type and microenvironment. The expression of PXR, its target genes and their biological or clinical significance have not been examined in hepatic cancer. In the present study, by generating DEN-induced hepatic cancer in mice, we report that the expression of PXR and its target genes CYP3A11 and GSTa2 are down-regulated implying impairment of hepatic detoxification capacity. A higher state of inflammation was observed in liver cancer tissues as evident from upregulation of inflammatory cytokines IL-6 and TNF-α along with NF-κB and STAT3. Our data in mouse model suggested a negative correlation between down-regulation of PXR and its target genes with that of higher expression of inflammatory proteins (like IL-6, TNF-α, NF-κB). In conjunction, our findings with relevant cell culture based assays showed that higher expression of PXR is involved in reduction of tumorigenic potential in hepatic cancer. Overall, the findings suggest that inflammation influences the expression of hepatic proteins important in drug metabolism while higher PXR level reduces tumorigenic potential in hepatic cancer.
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Affiliation(s)
- Deepak Kotiya
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
| | - Bharti Jaiswal
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
| | - Sampa Ghose
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
| | - Rachna Kaul
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
| | - Kasturi Datta
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Rakesh K. Tyagi
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
- * E-mail:
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27
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Brewer CT, Chen T. PXR variants: the impact on drug metabolism and therapeutic responses. Acta Pharm Sin B 2016; 6:441-449. [PMID: 27709012 PMCID: PMC5045535 DOI: 10.1016/j.apsb.2016.07.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 04/21/2016] [Accepted: 05/04/2016] [Indexed: 01/30/2023] Open
Abstract
The pregnane X receptor (PXR) plays an important and diverse role in mediating xenobiotic induction of drug-metabolizing enzymes and transporters. Several protein isoforms of PXR exist, and they have differential transcriptional activity upon target genes; transcript variants 3 (PXR3) and 4 (PXR4) do not induce target gene expression, whereas transcript variants 1 (PXR1) and 2 (PXR2) respond to agonist by activating target gene expression. PXR protein variants also display differences in protein-protein interactions; PXR1 interacts with p53, whereas PXR3 does not. Furthermore, the transcript variants of PXR that encode these protein isoforms are differentially regulated by methylation and deletions in the respective promoters of the variants, and their expression differs in various human cancers and also in cancerous tissue compared to adjacent normal tissues. PXR1 and PXR4 mRNA are downregulated by methylation in cancerous tissue and have divergent effects on cellular proliferation when ectopically overexpressed. Additional detailed and comparative mechanistic studies are required to predict the effect of PXR transcript variant expression on carcinogenesis, therapeutic response, and the development of toxicity.
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Key Words
- AF, activating function
- BAMCA, bacterial artificial chromosome array–based methylated CpG island amplification
- CYP, cytochrome P450
- Drug metabolism
- GST, glutathione S-transferase
- MDR, multidrug resistance protein
- NHR, nuclear hormone receptor
- P-gp, P-glycoprotein
- PXR1, PXR transcript variant 1 (434 residues)
- PXR2, transcript variant 2 (473 residues)
- PXR3, transcript variant 3 (397 residues)
- PXR4, transcript variant 4 (322 residues;AK122990)
- Pregnane X receptor
- RACE, 5′ rapid amplification of cDNA ends
- Therapeutic responses
- Toxicity
- Transcript variants
- UGT, UDP-glucuronosyltransferase
- UTR, untranslated region
- shRNA, short hairpin RNA
- siRNA, small interfering RNA
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Affiliation(s)
- C. Trent Brewer
- Department of Chemical Biology and Therapeutics, St. Jude Children′s Research Hospital, Memphis, TN 38105, USA
- Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children′s Research Hospital, Memphis, TN 38105, USA
- Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, TN 38163, USA
- Corresponding author at: Department of Chemical Biology and Therapeutics, St. Jude Children′s Research Hospital, Mail Stop #1000, 262 Danny Thomas Place, Memphis, TN 38105, USA. Tel.: +1 901 595 5937; fax: +1 901 595 5715.Department of Chemical Biology and Therapeutics, St. Jude Children′s Research Hospital, Mail Stop #1000, 262 Danny Thomas PlaceMemphisTN38105USA
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De Mattia E, Cecchin E, Roncato R, Toffoli G. Pregnane X receptor, constitutive androstane receptor and hepatocyte nuclear factors as emerging players in cancer precision medicine. Pharmacogenomics 2016; 17:1547-71. [DOI: 10.2217/pgs-2016-0095] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Great research effort has been focused on elucidating the contribution of host genetic variability on pharmacological outcomes in cancer. Nuclear receptors have emerged as mediators between environmental stimuli and drug pharmacokinetics and pharmacodynamics. The pregnane X receptor, constitutive androstane receptor and hepatocyte nuclear factors have been reported to regulate transcription of genes that encode drug metabolizing enzymes and transporters. Altered nuclear receptor expression has been shown to affect the metabolism and pharmacological profile of traditional chemotherapeutics and targeted agents. Accordingly, polymorphic variants in these genes have been studied as pharmacogenetic markers of outcome variability. This review summarizes the state of knowledge about the roles played by pregnane X receptor, constitutive androstane receptor and hepatocyte nuclear factor expression and genetics as predictive markers of anticancer drug toxicity and efficacy, which can improve cancer precision medicine.
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Affiliation(s)
- Elena De Mattia
- Experimental & Clinical Pharmacology, Centro di Riferimento Oncologico- National Cancer Institute, Aviano, Italy
| | - Erika Cecchin
- Experimental & Clinical Pharmacology, Centro di Riferimento Oncologico- National Cancer Institute, Aviano, Italy
| | - Rossana Roncato
- Experimental & Clinical Pharmacology, Centro di Riferimento Oncologico- National Cancer Institute, Aviano, Italy
| | - Giuseppe Toffoli
- Experimental & Clinical Pharmacology, Centro di Riferimento Oncologico- National Cancer Institute, Aviano, Italy
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Pondugula SR, Pavek P, Mani S. Pregnane X Receptor and Cancer: Context-Specificity is Key. NUCLEAR RECEPTOR RESEARCH 2016; 3. [PMID: 27617265 DOI: 10.11131/2016/101198] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Pregnane X receptor (PXR) is an adopted orphan nuclear receptor that is activated by a wide-range of endobiotics and xenobiotics, including chemotherapy drugs. PXR plays a major role in the metabolism and clearance of xenobiotics and endobiotics in liver and intestine via induction of drug-metabolizing enzymes and drug-transporting proteins. However, PXR is expressed in several cancer tissues and the accumulating evidence strongly points to the differential role of PXR in cancer growth and progression as well as in chemotherapy outcome. In cancer cells, besides regulating the gene expression of enzymes and proteins involved in drug metabolism and transport, PXR also regulates other genes involved in proliferation, metastasis, apoptosis, anti-apoptosis, inflammation, and oxidative stress. In this review, we focus on the differential role of PXR in a variety of cancers, including prostate, breast, ovarian, endometrial, and colon. We also discuss the future directions to further understand the differential role of PXR in cancer, and conclude with the need to identify novel selective PXR modulators to target PXR in PXR-expressing cancers.
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Affiliation(s)
- Satyanarayana R Pondugula
- Department of Anatomy, Physiology and Pharmacology, Auburn University, Auburn, AL 36849, USA; Auburn University Research Initiative in Cancer, Auburn University, Auburn, AL 36849, USA
| | - Petr Pavek
- Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Heyrovského 1203, Hradec Králové 500 05, Czech Republic, European Union
| | - Sridhar Mani
- Albert Einstein Cancer Center, Albert Einstein College of Medicine, New York, NY 10461, USA
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Effect of Single Nucleotide Polymorphisms in the Xenobiotic-sensing Receptors NR1I2 and NR1I3 on the Pharmacokinetics and Toxicity of Irinotecan in Colorectal Cancer Patients. Clin Pharmacokinet 2016; 55:1145-57. [DOI: 10.1007/s40262-016-0392-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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31
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Delfosse V, Balaguer P, Bourguet W. L’association fait le poison. Med Sci (Paris) 2016; 32:326-8. [DOI: 10.1051/medsci/20163204005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Cecchin E, De Mattia E, Toffoli G. Nuclear receptors and drug metabolism for the personalization of cancer therapy. Expert Opin Drug Metab Toxicol 2016; 12:291-306. [DOI: 10.1517/17425255.2016.1141196] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Erika Cecchin
- Experimental and Clinical Pharmacology, Centro di Riferimento Oncologico- National Cancer Institute, Aviano, Italy
| | - Elena De Mattia
- Experimental and Clinical Pharmacology, Centro di Riferimento Oncologico- National Cancer Institute, Aviano, Italy
| | - Giuseppe Toffoli
- Experimental and Clinical Pharmacology, Centro di Riferimento Oncologico- National Cancer Institute, Aviano, Italy
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Abstract
The final therapeutic effect of a drug candidate, which is directed to a specific molecular target strongly depends on its absorption, distribution, metabolism and excretion (ADME). The disruption of at least one element of ADME may result in serious drug resistance. In this work we described the role of one element of this resistance: phase II metabolism with UDP-glucuronosyltransferases (UGTs). UGT function is the transformation of their substrates into more polar metabolites, which are better substrates for the ABC transporters, MDR1, MRP and BCRP, than the native drug. UGT-mediated drug resistance can be associated with (i) inherent overexpression of the enzyme, named intrinsic drug resistance or (ii) induced expression of the enzyme, named acquired drug resistance observed when enzyme expression is induced by the drug or other factors, as food-derived compounds. Very often this induction occurs via ligand binding receptors including AhR (aryl hydrocarbon receptor) PXR (pregnane X receptor), or other transcription factors. The effect of UGT dependent resistance is strengthened by coordinate action and also a coordinate regulation of the expression of UGTs and ABC transporters. This coupling of UGT and multidrug resistance proteins has been intensively studied, particularly in the case of antitumor treatment, when this resistance is "improved" by differences in UGT expression between tumor and healthy tissue. Multidrug resistance coordinated with glucuronidation has also been described here for drugs used in the management of epilepsy, psychiatric diseases, HIV infections, hypertension and hypercholesterolemia. Proposals to reverse UGT-mediated drug resistance should consider the endogenous functions of UGT.
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Affiliation(s)
- Zofia Mazerska
- Gdańsk University of Technology, Chemical Faculty, Department of Pharmaceutical Technology and Biochemistry, 80-233 Gdańsk, Poland
| | - Anna Mróz
- Gdańsk University of Technology, Chemical Faculty, Department of Pharmaceutical Technology and Biochemistry, 80-233 Gdańsk, Poland
| | - Monika Pawłowska
- Gdańsk University of Technology, Chemical Faculty, Department of Pharmaceutical Technology and Biochemistry, 80-233 Gdańsk, Poland
| | - Ewa Augustin
- Gdańsk University of Technology, Chemical Faculty, Department of Pharmaceutical Technology and Biochemistry, 80-233 Gdańsk, Poland.
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(Intrinsically disordered) splice variants in the proteome: implications for novel drug discovery. Genes Genomics 2016. [DOI: 10.1007/s13258-015-0384-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Ghose R, Mallick P, Taneja G, Chu C, Moorthy B. In Vitro Approaches to Study Regulation of Hepatic Cytochrome P450 (CYP) 3A Expression by Paclitaxel and Rifampicin. Methods Mol Biol 2016; 1395:55-68. [PMID: 26910068 DOI: 10.1007/978-1-4939-3347-1_4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cancer is the second leading cause of mortality worldwide; however the response rate to chemotherapy treatment remains slow, mainly due to narrow therapeutic index and multidrug resistance. Paclitaxel (taxol) has a superior outcome in terms of response rates and progression-free survival. However, numerous cancer patients are resistant to this drug. In this investigation, we tested the hypothesis that induction of cytochrome P450 (Cyp)3a11 gene by paclitaxel is downregulated by the inflammatory mediator, lipopolysaccharide (LPS), and that the pro-inflammatory cytokine, tumor necrosis factor (TNF)-α, attenuates human CYP3A4 gene induction by rifampicin. Primary mouse hepatocytes were pretreated with LPS (1 μg/ml) for 10 min, followed by paclitaxel (20 μM) or vehicle for 24 h. RNA was extracted from the cells by trizol method followed by cDNA synthesis and analysis by real-time PCR. Paclitaxel significantly induced gene expression of Cyp3a11 (~30-fold) and this induction was attenuated in LPS-treated samples. Induction and subsequent downregulation of CYP3A enzyme can impact paclitaxel treatment in cancer patients where inflammatory mediators are activated. It has been shown that the nuclear receptor, pregnane X receptor (PXR), plays a role in the induction of CYP enzymes. In order to understand the mechanisms of regulation of human CYP3A4 gene, we co-transfected HepG2 cells (human liver cell line) with CYP3A4-luciferase construct and a PXR expression plasmid. The cells were then treated with the pro-inflammatory cytokine, TNFα, followed by the prototype CYP3A inducer rifampicin. It is well established that rifampicin activates PXR, leading to CYP3A4 induction. We found that induction of CYP3A4-luciferase activity by rifampicin was significantly attenuated by TNFα. In conclusion, we describe herein several in vitro approaches entailing primary and cultured hepatocytes, real-time PCR, and transcriptional activation (transfection) assays to investigate the molecular regulation of CYP3A, which plays a pivotal role in the metabolism of numerous chemotherapeutic drugs. Genetic or drug-induced variation in CYP3A and/or PXR expression could contribute to drug resistance to chemotherapeutic agents in cancer patients.
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Affiliation(s)
- Romi Ghose
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston, Houston, TX, 77030, USA
| | - Pankajini Mallick
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston, Houston, TX, 77030, USA
| | - Guncha Taneja
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston, Houston, TX, 77030, USA
| | - Chun Chu
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Bhagavatula Moorthy
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA.
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Lv JF, Hu L, Zhuo W, Zhang CM, Zhou HH, Fan L. Epigenetic alternations and cancer chemotherapy response. Cancer Chemother Pharmacol 2015; 77:673-84. [DOI: 10.1007/s00280-015-2951-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 12/17/2015] [Indexed: 12/29/2022]
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Koturbash I, Tolleson WH, Guo L, Yu D, Chen S, Hong H, Mattes W, Ning B. microRNAs as pharmacogenomic biomarkers for drug efficacy and drug safety assessment. Biomark Med 2015; 9:1153-76. [PMID: 26501795 PMCID: PMC5712454 DOI: 10.2217/bmm.15.89] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Much evidence has documented that microRNAs (miRNAs) play an important role in the modulation of interindividual variability in the production of drug metabolizing enzymes and transporters (DMETs) and nuclear receptors (NRs) through multidirectional interactions involving environmental stimuli/stressors, the expression of miRNA molecules and genetic polymorphisms. MiRNA expression has been reported to be affected by drugs and miRNAs themselves may affect drug metabolism and toxicity. In cancer research, miRNA biomarkers have been identified to mediate intrinsic and acquired resistance to cancer therapies. In drug safety assessment, miRNAs have been found associated with cardiotoxicity, hepatotoxicity and nephrotoxicity. This review article summarizes published studies to show that miRNAs can serve as early biomarkers for the evaluation of drug efficacy and drug safety.
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Affiliation(s)
- Igor Koturbash
- Department of Environmental & Occupational Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - William H Tolleson
- National Center for Toxicological Research, US Food & Drug Administration, Jefferson, AR 72079, USA
| | - Lei Guo
- National Center for Toxicological Research, US Food & Drug Administration, Jefferson, AR 72079, USA
| | - Dianke Yu
- National Center for Toxicological Research, US Food & Drug Administration, Jefferson, AR 72079, USA
| | - Si Chen
- National Center for Toxicological Research, US Food & Drug Administration, Jefferson, AR 72079, USA
| | - Huixiao Hong
- National Center for Toxicological Research, US Food & Drug Administration, Jefferson, AR 72079, USA
| | - William Mattes
- National Center for Toxicological Research, US Food & Drug Administration, Jefferson, AR 72079, USA
| | - Baitang Ning
- National Center for Toxicological Research, US Food & Drug Administration, Jefferson, AR 72079, USA
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Hodnik Ž, Tomašič T, Smodiš D, D'Amore C, Mašič LP, Fiorucci S, Kikelj D. Diethylstilbestrol-scaffold-based pregnane X receptor modulators. Eur J Med Chem 2015; 103:551-62. [PMID: 26408814 DOI: 10.1016/j.ejmech.2015.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/21/2015] [Accepted: 09/04/2015] [Indexed: 12/22/2022]
Abstract
Due to its function as a regulator of drug-metabolizing enzymes and transporters, pregnane X receptor (PXR) represents an important factor involved in drug metabolism. In this work, we describe the discovery of diethylstilbestrol-based PXR modulators, which were designed from marine sulfated steroids with PXR agonistic activity, solomonsterols A and B, and our recently reported bazedoxifene scaffold-derived PXR antagonists. The methylated diethylstilbestrol derivative 1 displayed potent PXR agonistic activity with an EC50 value of 10.5 μM, whereas compounds 3, 4 and 6 (IC50 for 6 = 27.4 μM) and diethylstilbestrol (2) itself (IC50 = 14.6 μM) exhibited PXR antagonistic effects in HepG2 cells. The PXR modulatory effects of the synthesized diethylstilbestrol derivatives were further confirmed by the induction of PXR-regulated CYP3A4 expression with compound 1, as well as by the inhibition of the rifaximin-promoted up-regulation of CYP3A4 expression with 2 and its derivative 6.
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Affiliation(s)
- Žiga Hodnik
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000 Ljubljana, Slovenia
| | - Tihomir Tomašič
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000 Ljubljana, Slovenia
| | - Domen Smodiš
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000 Ljubljana, Slovenia
| | - Claudio D'Amore
- University of Perugia, Dipartimento di Medicina Clinica e Sperimentale, Nuova Facultàdi Medicina e Chirurgia, S. Andrea delle Fratte, 06132 Perugia, Italy
| | | | - Stefano Fiorucci
- University of Perugia, Dipartimento di Medicina Clinica e Sperimentale, Nuova Facultàdi Medicina e Chirurgia, S. Andrea delle Fratte, 06132 Perugia, Italy
| | - Danijel Kikelj
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000 Ljubljana, Slovenia.
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Koutsounas I, Giaginis C, Alexandrou P, Zizi-Serbetzoglou A, Patsouris E, Kouraklis G, Theocharis S. Pregnane X Receptor Expression in Human Pancreatic Adenocarcinoma: Associations With Clinicopathologic Parameters, Tumor Proliferative Capacity, Patients' Survival, and Retinoid X Receptor Expression. Pancreas 2015; 44:1134-40. [PMID: 26355550 DOI: 10.1097/mpa.0000000000000405] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES Pregnane X receptor (PXR) has been involved in human malignancy, either by directly affecting carcinogenesis or by inducing drug-drug interactions and chemotherapy resistance. The present study aimed to assess the clinical significance of PXR in pancreatic adenocarcinoma. METHODS Pregnane X receptor and its heterodimers' PXR/retinoid X receptor α (RXR-α), RXR-β, and RXR-γ expression were assessed immunohistochemically on tumoral samples from 55 pancreatic adenocarcinoma patients and were associated with clinicopathologic parameters, tumor proliferative capacity, and patients' survival. RESULTS Enhanced PXR expression was noted in 24 (43.6%) of 55 pancreatic adenocarcinoma cases. Pancreatic adenocarcinoma patients presenting increased histological grade of tumor differentiation showed a significant increased incidence of elevated PXR expression (P = 0.023). Enhanced PXR/RXR-β expression was significantly associated with smaller tumor size and earlier clinical stage (P = 0.005 and P = 0.003, respectively). Elevated PXR/RXR-γ expression was significantly associated with smaller tumor size and earlier clinical stage (P = 0.012 and P = 0.014, respectively) and borderline with the absence of lymph node metastases (P = 0.056). In addition, pancreatic adenocarcinoma patients presenting enhanced PXR/RXR-γ expression showed marginally longer survival times compared with those with decreased expression (log-rank test, P = 0.053). CONCLUSIONS This study supported evidence that PXR and its copartners' overexpression may be associated with favorable clinicopathologic parameters and better outcome in pancreatic adenocarcinoma.
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Affiliation(s)
- Ioannis Koutsounas
- From the *First Department of Pathology, Medical School, National and Kapodistrian University of Athens, Athens; †Department of Food Science and Nutrition, School of the Environment, University of the Aegean, Myrina, Lemnos; ‡Department of Pathology, Tzaneio General Hospital, Piraeus; and §Second Department of Propedeutic Surgery, Medical School, University of Athens, Athens, Greece
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Synergistic activation of human pregnane X receptor by binary cocktails of pharmaceutical and environmental compounds. Nat Commun 2015; 6:8089. [PMID: 26333997 PMCID: PMC4569708 DOI: 10.1038/ncomms9089] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 07/15/2015] [Indexed: 12/19/2022] Open
Abstract
Humans are chronically exposed to multiple exogenous substances, including environmental pollutants, drugs and dietary components. Many of these compounds are suspected to impact human health, and their combination in complex mixtures could exacerbate their harmful effects. Here we demonstrate that a pharmaceutical oestrogen and a persistent organochlorine pesticide, both exhibiting low efficacy when studied separately, cooperatively bind to the pregnane X receptor, leading to synergistic activation. Biophysical analysis shows that each ligand enhances the binding affinity of the other, so the binary mixture induces a substantial biological response at doses at which each chemical individually is inactive. High-resolution crystal structures reveal the structural basis for the observed cooperativity. Our results suggest that the formation of ‘supramolecular ligands' within the ligand-binding pocket of nuclear receptors contributes to the synergistic toxic effect of chemical mixtures, which may have broad implications for the fields of endocrine disruption, toxicology and chemical risk assessment. Endocrine-disrupting chemicals act on nuclear hormone receptors, such as PXR. Here, Delfosse et al. show how two such chemicals interact with each other in the PXR ligand-binding pocket, forming a so-called supramolecular ligand that is a more potent PXR activator than each of the two chemicals alone.
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Kumari S, Saradhi M, Rana M, Chatterjee S, Aumercier M, Mukhopadhyay G, Tyagi RK. Pregnane and Xenobiotic Receptor gene expression in liver cells is modulated by Ets-1 in synchrony with transcription factors Pax5, LEF-1 and c-jun. Exp Cell Res 2015; 330:398-411. [DOI: 10.1016/j.yexcr.2014.09.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 09/13/2014] [Accepted: 09/15/2014] [Indexed: 11/16/2022]
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Liu MZ, McLeod HL, He FZ, Chen XP, Zhou HH, Shu Y, Zhang W. Epigenetic perspectives on cancer chemotherapy response. Pharmacogenomics 2014; 15:699-715. [PMID: 24798726 DOI: 10.2217/pgs.14.41] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Epigenetic programs are now widely recognized as being critical to the biological processes of cancer genesis. However, it has not been comprehensively understood how and to what degree they can influence anticancer drugs responses. The development of drugs targeting epigenetic regulation has generated great enthusiasm, with a growing number in clinical development. We highlight here that epigenetic modifications can be involved in the regulation of genes responsible for the absorption, distribution, metabolism and excretion of drugs and for the pathological progression of cancer, thereby affecting anticancer drug responses. The major epigenetic regulatory mechanisms are reviewed, including DNA methylation, miRNA regulation and histone modification, with the aim of promoting rational use of anticancer drugs in the clinic and epigenetic drug development.
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Affiliation(s)
- Mou-Ze Liu
- Pharmacogenetics Research Institute, Institute of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, PR China
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Breuker C, Planque C, Rajabi F, Nault JC, Couchy G, Zucman-Rossi J, Evrard A, Kantar J, Chevet E, Bioulac-Sage P, Ramos J, Assenat E, Joubert D, Pannequin J, Hollande F, Pascussi JM. Characterization of a novel PXR isoform with potential dominant-negative properties. J Hepatol 2014; 61:609-16. [PMID: 24798619 DOI: 10.1016/j.jhep.2014.04.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 04/08/2014] [Accepted: 04/24/2014] [Indexed: 12/04/2022]
Abstract
BACKGROUND & AIMS The nuclear Pregnane X Receptor (PXR, NR1I2) plays a pivotal role in xenobiotic metabolism. Here, we sought to characterize a new PXR isoform (hereafter called small PXR or sPXR) stemming from alternative transcription starting sites downstream of a CpG Island located near exon 3 of the human PXR gene. METHODS Quantitative RT-PCR, western blot, methylation-specific PCR, luciferase reporter assays, electro-mobility shift assays, and stable sPXR overexpression were used to examine sPXR expression and function in hepatocellular cell lines, healthy human liver (n=99), hepatocellular adenomas (HCA, n=91) and hepatocellular carcinoma samples (HCC, n=213). RESULTS Liver sPXR mRNA expression varied importantly among individuals and encodes a 37kDa nuclear protein consisting of the ligand-binding domain of PXR that behaves as a dominant-negative of PXR transactivation properties. In vitro methylation of the sPXR upstream promoter abolished its activity, while the demethylation agent 5-aza-2-deoxycytidine increased sPXR mRNA expression in several cell lines. Finally, we observed that sPXR mRNA expression displayed significant differences related to HCA or HCC biology. CONCLUSIONS This novel PXR isoform, displaying a dominant-negative activity and regulated by DNA methylation, is associated with outcomes of patients with HCC treated by resection, suggesting that it represents a key modulator of PXR.
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Affiliation(s)
- Cyril Breuker
- Centre National de la Recherche Scientifique, UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France; Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, France; Université Montpellier 1 et 2, UMR5203, Montpellier, France; Service de Pharmacie, Centre Hospitalier Universitaire Lapeyronie, Montpellier, France
| | - Chris Planque
- Centre National de la Recherche Scientifique, UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France; Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, France; Université Montpellier 1 et 2, UMR5203, Montpellier, France
| | - Fatemeh Rajabi
- Centre National de la Recherche Scientifique, UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France; Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, France; Université Montpellier 1 et 2, UMR5203, Montpellier, France
| | - Jean-Charles Nault
- Institut National de la Santé et de la Recherche Médicale, U674, Paris, France; Université Paris Descartes, Paris, France
| | - Gabrielle Couchy
- Institut National de la Santé et de la Recherche Médicale, U674, Paris, France; Université Paris Descartes, Paris, France
| | - Jessica Zucman-Rossi
- Institut National de la Santé et de la Recherche Médicale, U674, Paris, France; Université Paris Descartes, Paris, France
| | - Alexandre Evrard
- Centre National de la Recherche Scientifique, UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France; Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, France; Université Montpellier 1 et 2, UMR5203, Montpellier, France; Laboratoire de Biochimie, Centre Hospitalier Universitaire, Nîmes, France
| | - Jovana Kantar
- Laboratoire de Biochimie, Centre Hospitalier Universitaire, Nîmes, France
| | - Eric Chevet
- Institut National de la Santé et de la Recherche Médicale, U1053, Bordeaux, France
| | - Paulette Bioulac-Sage
- Service d'anatomie pathologique, Centre Hospitalier Universitaire Gui de Chauliac, Montpellier, France
| | - Jeanne Ramos
- Service d'anatomie pathologique, Centre Hospitalier Universitaire Gui de Chauliac, Montpellier, France
| | - Eric Assenat
- Service d'anatomie pathologique, Centre Hospitalier Universitaire Gui de Chauliac, Montpellier, France; Centre Val d'Aurelle, Montpellier, France
| | - Dominique Joubert
- Centre National de la Recherche Scientifique, UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France; Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, France; Université Montpellier 1 et 2, UMR5203, Montpellier, France
| | - Julie Pannequin
- Centre National de la Recherche Scientifique, UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France; Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, France; Université Montpellier 1 et 2, UMR5203, Montpellier, France
| | - Frédéric Hollande
- Centre National de la Recherche Scientifique, UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France; Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, France; Université Montpellier 1 et 2, UMR5203, Montpellier, France; Department of Pathology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Jean Marc Pascussi
- Centre National de la Recherche Scientifique, UMR5203, Institut de Génomique Fonctionnelle, Montpellier, France; Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, France; Université Montpellier 1 et 2, UMR5203, Montpellier, France.
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Effects of rifampin and ketoconazole on pharmacokinetics of morinidazole in healthy chinese subjects. Antimicrob Agents Chemother 2014; 58:5987-93. [PMID: 25070100 DOI: 10.1128/aac.03382-14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Morinidazole, a 5-nitroimidazole antimicrobial drug, has been approved for the treatment of amoebiasis, trichomoniasis, and anaerobic bacterial infections in China. It was reported that drug-drug interaction happened after the coadministration of ornidazole, an analog of morinidazole, and rifampin or ketoconazole. Therefore, we measured the plasma pharmacokinetics (PK) of morinidazole and its metabolites in the healthy Chinese volunteers prior to and following the administration of rifampin or ketoconazole using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The area under the concentration-time curve from time 0 to time t (AUC0-t) and maximum concentration in serum (Cmax) of morinidazole were decreased by 28% and 23%, respectively, after 6 days of exposure to 600 mg of rifampin once daily; the Cmaxs of N(+)-glucuronides were increased by 14%, while their AUC0-ts were hardly changed. After 7 days of exposure to 200 mg of ketoconazole once daily, the AUC0-t and Cmax of the parent drug were not affected significantly. Cmaxs of N(+)-glucuronides were decreased by 23%; AUC0-ts were decreased by 14%. The exposure of sulfate conjugate was hardly changed after the coadministration of rifampin or ketoconazole. Using recombinant enzyme of UGT1A9 and human hepatocytes, the mechanism of the altered PK behaviors of morinidazole and its metabolites was investigated. In human hepatocytes, ketoconazole dose dependently inhibited the formation of N(+)-glucuronides (50% inhibitory concentration [IC50], 1.5 μM), while rifampin induced the mRNA level of UGT1A9 by 28% and the activity of UGT1A9 by 53%. In conclusion, the effects of rifampin and ketoconazole on the plasma exposures of morinidazole and N(+)-glucuronide are less than 50%; therefore, rifampin and ketoconazole have little clinical significance in the pharmacokinetics of morinidazole.
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Yang L, Zhu L, Ge G, Xiao L, Wu Y, Liang S, Cao Y, Yang L, Wang D. Species-associated differences in the inhibition of propofol glucuronidation by magnolol. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE : JAALAS 2014; 53:408-411. [PMID: 25199099 PMCID: PMC4113243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 10/15/2013] [Accepted: 12/17/2013] [Indexed: 06/03/2023]
Abstract
Magnolol, a major active constituent in herbal medicine, potently inhibits propofol glucuronidation in human liver microsomes, with inhibition constants in the nanomolar range. This study was conducted to investigate magnolol-induced inhibition of propofol glucuronidation in liver microsomes from Swiss-Hauschka mice, Sprague-Dawley rats, Chinese Bama pigs, and cynomolgus macaques. Results indicated that magnolol (10 μM) inhibited propofol glucuronidation in liver microsomes from Bama pigs and cynomolgus macaques but not in those from mice or rats. Data from liver microsomes from Bama pigs indicated a competitive inhibition mechanism, with a Ki of 1.7 μM. In contrast to that of pig liver microsomes, the inhibition of microsomes from cynomolgus macaques followed a noncompetitive mechanism, with a Ki of 3.4 μM. In summary, this study indicates that magnolol-induced inhibition of propofol glucuronidation varies substantially among species, and the Ki values determined by using liver microsomes from various experimental animal species far exceed that for human liver microsomes. The inhibition of propofol glucuronidation by magnolol in liver microsomes from all animal species tested was significantly lower than the inhibition previously demonstrated in human liver microsomes. Hepatic microsomes from Swiss-Hauschka mice, Sprague-Dawley rats, Chinese Bama pigs, and cynomolgus macaques are not effective models of the inhibition of glucuronidation induced by magnolol in humans.
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Affiliation(s)
- Lu Yang
- School of Pharmacy, Liaoning University of Traditional Chinese Medicine, Dalian, China
| | | | - Guangbo Ge
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Ling Xiao
- School of Resources and Environment, Anqing Normal University, Anqing, China
| | | | - Sicheng Liang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Yunfeng Cao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Ling Yang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Dong Wang
- School of Pharmacy, Liaoning University of Traditional Chinese Medicine, Dalian, China
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Zhuo W, Hu L, Lv J, Wang H, Zhou H, Fan L. Role of pregnane X receptor in chemotherapeutic treatment. Cancer Chemother Pharmacol 2014; 74:217-27. [PMID: 24889719 DOI: 10.1007/s00280-014-2494-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Accepted: 05/06/2014] [Indexed: 10/25/2022]
Abstract
Pregnane X receptor (PXR) is a member of the nuclear receptor superfamily that differently expresses not only in human normal tissues but also in numerous types of human cancers. PXR can be activated by many endogenous substances and exogenous chemicals, and thus affects chemotherapeutic effects and intervenes drug-drug interactions by regulating its target genes involving drug metabolism and transportation, cell proliferation and apoptosis, and modulating endobiotic homeostasis. Tissue and context-specific regulation of PXR contributes to diverse effects in the treatment for numerous cancers. Genetic variants of PXR lead to intra- and inter-individual differences in the expression and inducibility of PXR, resulting in different responses to chemotherapy in PXR-positive cancers. The purpose of this review is to summarize and discuss the role of PXR in the metabolism and clearance of anticancer drugs. It is also expected that this review will provide insights into PXR-mediated enhancement for chemotherapeutic treatment, prediction of drug-drug interactions and personalized medicine.
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Affiliation(s)
- Wei Zhuo
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, People's Republic of China
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Intérêt du génotypage de l’UGT1A1 dans le cadre du traitement des cancers digestifs par irinotécan. Bull Cancer 2014; 101:533-53. [DOI: 10.1684/bdc.2014.1933] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Hodnik Ž, Peterlin Mašič L, Tomašić T, Smodiš D, D'Amore C, Fiorucci S, Kikelj D. Bazedoxifene-scaffold-based mimetics of solomonsterols A and B as novel pregnane X receptor antagonists. J Med Chem 2014; 57:4819-33. [PMID: 24828006 DOI: 10.1021/jm500351m] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Pregnane X receptor (PXR), a member of the NR1I nuclear receptor family, acts as a xenobiotic sensor and a paramount transcriptional regulator of drug-metabolizing enzymes and transporters. The overexpression of PXR in various cancer cells indicates the importance of PXR as a drug target for countering multidrug resistance in anticancer treatments. We describe the discovery of novel bazedoxifene-scaffold-based PXR antagonists inspired by the marine sulfated steroids solomonsterol A and B as natural leads. A luciferase reporter assay on a PXR-transfected HepG2 cell line identified compounds 19-24 as promising PXR antagonists. Further structure-activity relationship studies of the most active PXR antagonist from the series (compound 20, IC50 = 11 μM) revealed the importance of hydroxyl groups as hydrogen-bond donors for PXR antagonistic activity. PXR antagonists 20 and 24 (IC50 = 14 μM), in addition to the downregulation of PXR expression, exhibited inhibition of PXR-induced CYP3A4 expression, which illustrates their potential to suppress PXR-regulated phase-I drug metabolism.
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Affiliation(s)
- Žiga Hodnik
- Faculty of Pharmacy, University of Ljubljana , Aškerčeva 7, 1000 Ljubljana, Slovenia
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Ong SS, Goktug AN, Elias A, Wu J, Saunders D, Chen T. Stability of the human pregnane X receptor is regulated by E3 ligase UBR5 and serine/threonine kinase DYRK2. Biochem J 2014; 459:193-203. [PMID: 24438055 PMCID: PMC3959618 DOI: 10.1042/bj20130558] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The hPXR (human pregnane X receptor), a major chemical toxin sensor, is a ligand-induced transcription factor activated by various xenobiotics and toxins, resulting in the transcriptional up-regulation of detoxifying enzymes. To date, little is known about the upstream regulation of hPXR. Using MS analysis and a kinome-wide siRNA screen, we report that the E3 ligase UBR5 (ubiquitin protein ligase E3 component n-recognin 5) and DYRK2 (dual-specificity tyrosine-phosphorylation-regulated kinase 2) regulate hPXR stability. UBR5 knockdown resulted in accumulation of cellular hPXR and a concomitant increase in hPXR activity, whereas the rescue of UBR5 knockdown decreased the cellular hPXR level and activity. Importantly, UBR5 exerted its effect in concert with the serine/threonine kinase DYRK2, as the knockdown of DYRK2 phenocopied UBR5 knockdown. hPXR was shown to be a substrate for DYRK2, and DYRK2-dependent phosphorylation of hPXR facilitated its subsequent ubiquitination by UBR5. This is the first report of the post-translational regulation of hPXR via phosphorylation-facilitated ubiquitination by DYRK2 and UBR5. The results of the present study reveal the role of the ubiquitin-proteasomal pathway in modulating hPXR activity and indicate that pharmacological inhibitors of the ubiquitin-proteasomal pathway that regulate hPXR stability may negatively affect treatment outcome from unintended hPXR-mediated drug-drug interactions.
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Affiliation(s)
- Su Sien Ong
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, Tennessee 38105, USA
| | - Asli N. Goktug
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, Tennessee 38105, USA
| | - Ayesha Elias
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, Tennessee 38105, USA
| | - Jing Wu
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, Tennessee 38105, USA
| | - Darren Saunders
- Cancer Research Program, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst NSW 2010, Australia
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, Tennessee 38105, USA
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Qiao EQ, Yang HJ. Effect of pregnane X receptor expression on drug resistance in breast cancer. Oncol Lett 2014; 7:1191-1196. [PMID: 24944691 PMCID: PMC3961277 DOI: 10.3892/ol.2014.1817] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 12/23/2013] [Indexed: 01/08/2023] Open
Abstract
This study was conducted to investigate the effect of increased expression of the nuclear transcription factor receptor pregnane X receptor (PXR) on drug resistance of breast cancer cells. Western blotting was used to detect the expression of PXR in breast carcinoma cells. The PXR agonist SR12813 was used to upregulate the expression of PXR. Semi-quantitative polymerase chain reaction was used to detect PXR gene expression in normal and cancerous breast tissues, as well as the expression levels of the drug-resistant genes multidrug resistance protein 1 (MDR1) and breast cancer resistance protein (BCRP) in breast cancer cells. A Cell Counting Kit-8 assay was used to observe the sensitivity of the breast cancer cells to chemotherapeutic agents. Flow cytometry was used to investigate cell apoptosis. PXR expression was detected in normal and cancerous human breast tissues and in breast cancer cell lines. SR12813 treatment led to an increased expression of PXR protein and an increased expression of drug-resistant genes, MDR1 and BCRP, in MCF-7 and MDA-MB-231 cells. SR12813 pretreatment significantly increased the resistance of MDA-MB-231 cells to docetaxel. A marked increase in resistance to 4-hydroxytamoxifen was also observed in MCF-7 with SR12813 pretreatment. Additionally, we also found that pretreatment with SR12813 led to reduced apoptosis of the two cell strains induced by chemotherapeutic agents. In conclusion, PXR expression has an important effect on the sensitivity to chemotherapy of PXR-positive breast carcinoma. The inhibitory effect of PXR on cell apoptosis may contribute to the drug resistance of breast carcinoma.
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Affiliation(s)
- En-Qi Qiao
- Department of Oncological Surgery, Zhejiang Cancer Hospital, Hangzhou, Zhejiang 310022, P.R. China
| | - Hong-Jian Yang
- Department of Oncological Surgery, Zhejiang Cancer Hospital, Hangzhou, Zhejiang 310022, P.R. China
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