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Aiyappa‐Maudsley R, Storr SJ, Rakha EA, Green AR, Ellis IO, Martin SG. CYP2S1 and CYP2W1 expression is associated with patient survival in breast cancer. J Pathol Clin Res 2022; 8:550-566. [PMID: 35902379 PMCID: PMC9535097 DOI: 10.1002/cjp2.291] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/21/2022] [Accepted: 07/01/2022] [Indexed: 12/29/2022]
Abstract
The cytochrome P450 family of enzymes metabolise a wide range of compounds and play important roles in breast cancer pathogenesis due to their involvement in estrogen metabolism and the production of carcinogenic metabolites during this process. The orphan CYPs, CYP2S1, and CYP2W1 are reportedly upregulated in breast cancer. However, their expression and association with clinicopathological and survival parameters have not been previously assessed in a large cohort of breast cancers. Protein expression of CYP2S1 and CYP2W1 was assessed in early-stage invasive breast cancers (n = 1,426) using immunohistochemistry and correlated with various clinicopathological parameters and survival. mRNA expression of CYP2S1 and CYP2W1 was also assessed in the Molecular Taxonomy of Breast Cancer International Consortium (METABRIC) cohort. Low nuclear and cytoplasmic CYP2S1 was significantly associated with high-grade tumours (p ≤ 0.009), intermediate Nottingham prognostic index (NPI) group (p ≤ 0.025), high mitotic frequency (p ≤ 0.002), human epidermal growth factor receptor 2 (HER2)-negative disease (p ≤ 0.011), and ductal carcinoma (p ≤ 0.022). Cytoplasmic CYP2S1 was additionally associated with patients ≥50 years (p < 0.001), estrogen receptor (ER)-positive tumours (p = 0.011), and high nuclear pleomorphism (p = 0.003). Low cytoplasmic CYP2W1 was significantly associated with patients ≥50 years (p = 0.002), HER2-negative disease (p = 0.003), intermediate NPI (p = 0.013), and mitosis (p = 0.009). Low cytoplasmic CYP2S1 was significantly associated with adverse breast cancer specific survival (p = 0.034), which remained so in multivariate analysis (hazard ratio [HR]: 0.639; 95% confidence interval [CI]: 0.483-0.846; p = 0.002). Low nuclear CYP2W1 was significantly associated with adverse breast cancer specific survival (p = 0.012), with significance also maintained in multivariate analysis (HR: 0.677; 95% CI: 0.510-0.898; p = 0.007). No associations with survival were observed in the METABRIC cohort. CYP2S1 and CYP2W1 are associated with patient survival in breast cancer and may be important prognostic biomarkers.
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Affiliation(s)
- Radhika Aiyappa‐Maudsley
- Nottingham Breast Cancer Research Centre, School of Medicine, Biodiscovery InstituteUniversity of Nottingham, University ParkNottinghamUK,Present address:
Cancer Research Centre, Department of Molecular and Clinical Cancer MedicineUniversity of Liverpool, William Henry Duncan BuildingLiverpoolUK
| | - Sarah J Storr
- Nottingham Breast Cancer Research Centre, School of Medicine, Biodiscovery InstituteUniversity of Nottingham, University ParkNottinghamUK
| | - Emad A Rakha
- Nottingham Breast Cancer Research Centre, School of Medicine, Biodiscovery InstituteUniversity of Nottingham, University ParkNottinghamUK
| | - Andrew R Green
- Nottingham Breast Cancer Research Centre, School of Medicine, Biodiscovery InstituteUniversity of Nottingham, University ParkNottinghamUK
| | - Ian O Ellis
- Nottingham Breast Cancer Research Centre, School of Medicine, Biodiscovery InstituteUniversity of Nottingham, University ParkNottinghamUK
| | - Stewart G Martin
- Nottingham Breast Cancer Research Centre, School of Medicine, Biodiscovery InstituteUniversity of Nottingham, University ParkNottinghamUK
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Bart AG, Morais G, Vangala VR, Loadman PM, Pors K, Scott EE. Cytochrome P450 Binding and Bioactivation of Tumor-Targeted Duocarmycin Agents. Drug Metab Dispos 2022; 50:49-57. [PMID: 34607808 PMCID: PMC8969195 DOI: 10.1124/dmd.121.000642] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/01/2021] [Indexed: 01/03/2023] Open
Abstract
Duocarmycin natural products are promising anticancer cytotoxins but too potent for systemic use. Re-engineering of the duocarmycin scaffold has enabled the discovery of prodrugs designed for bioactivation by tissue-specific cytochrome P450 (P450) enzymes. Lead prodrugs bioactivated by both P450 isoforms CYP1A1 and CYP2W1 have shown promising results in xenograft studies; however, to fully understand the potential of these agents it is desirable to compare dual-targeting compounds with isoform-selective analogs. Such redesign requires insight into the molecular interactions with these P450 enzymes. Herein binding and metabolism of the individual stereoisomers of the indole-based duocarmycin prodrug ICT2700 and a nontoxic benzofuran analog ICT2726 were evaluated with CYP1A1 and CYP2W1, revealing differences exploitable for drug design. Although enantiomers of both compounds bound to and were metabolized by CYP1A1, the stereochemistry of the chloromethyl fragment was critical for CYP2W1 interactions. CYP2W1 differentially binds the S enantiomer of ICT2726, and its metabolite profile could potentially be used as a biomarker to identify CYP2W1 functional activity. In contrast to benzofuran-based ICT2726, CYP2W1 differentially binds the R isomer of the indole-based ICT2700 over the S stereoisomer. Thus the ICT2700 R configuration warrants further investigation as a scaffold to favor CYP2W1-selective bioactivation. Furthermore, structures of both duocarmycin S enantiomers with CYP1A1 reveal orientations correlating with nontoxic metabolites, and further drug design optimization could lead to a decrease of CYP1A1 bioactivation. Overall, distinctive structural features present in the two P450 active sites can be useful for improving P450-and thus tissue-selective-bioactivation. SIGNIFICANCE STATEMENT: Prodrug versions of the natural product duocarmycin can be metabolized by human tissue-specific cytochrome P450 (P450) enzymes 1A1 and 2W1 to form an ultrapotent cytotoxin and/or high affinity 2W1 substrates to potentially probe functional activity in situ. The current work defines the binding and metabolism by both P450 enzymes to support the design of duocarmycins selectively activated by only one human P450 enzyme.
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Affiliation(s)
- Aaron G Bart
- Program in Biophysics (A.G.B., E.E.S.) and Departments of Medicinal Chemistry and Pharmacology and Biological Chemistry (E.E.S.), University of Michigan, Ann Arbor, Michigan; Institute of Cancer Therapeutics (G.M., P.M.L., K.P.), Centre for Pharmaceutical Engineering Science (V.R.V.), Faculty of Life Sciences, University of Bradford, United Kingdom
| | - Goreti Morais
- Program in Biophysics (A.G.B., E.E.S.) and Departments of Medicinal Chemistry and Pharmacology and Biological Chemistry (E.E.S.), University of Michigan, Ann Arbor, Michigan; Institute of Cancer Therapeutics (G.M., P.M.L., K.P.), Centre for Pharmaceutical Engineering Science (V.R.V.), Faculty of Life Sciences, University of Bradford, United Kingdom
| | - Venu R Vangala
- Program in Biophysics (A.G.B., E.E.S.) and Departments of Medicinal Chemistry and Pharmacology and Biological Chemistry (E.E.S.), University of Michigan, Ann Arbor, Michigan; Institute of Cancer Therapeutics (G.M., P.M.L., K.P.), Centre for Pharmaceutical Engineering Science (V.R.V.), Faculty of Life Sciences, University of Bradford, United Kingdom
| | - Paul M Loadman
- Program in Biophysics (A.G.B., E.E.S.) and Departments of Medicinal Chemistry and Pharmacology and Biological Chemistry (E.E.S.), University of Michigan, Ann Arbor, Michigan; Institute of Cancer Therapeutics (G.M., P.M.L., K.P.), Centre for Pharmaceutical Engineering Science (V.R.V.), Faculty of Life Sciences, University of Bradford, United Kingdom
| | - Klaus Pors
- Program in Biophysics (A.G.B., E.E.S.) and Departments of Medicinal Chemistry and Pharmacology and Biological Chemistry (E.E.S.), University of Michigan, Ann Arbor, Michigan; Institute of Cancer Therapeutics (G.M., P.M.L., K.P.), Centre for Pharmaceutical Engineering Science (V.R.V.), Faculty of Life Sciences, University of Bradford, United Kingdom
| | - Emily E Scott
- Program in Biophysics (A.G.B., E.E.S.) and Departments of Medicinal Chemistry and Pharmacology and Biological Chemistry (E.E.S.), University of Michigan, Ann Arbor, Michigan; Institute of Cancer Therapeutics (G.M., P.M.L., K.P.), Centre for Pharmaceutical Engineering Science (V.R.V.), Faculty of Life Sciences, University of Bradford, United Kingdom
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Cytochrome P450 Enzymes and Drug Metabolism in Humans. Int J Mol Sci 2021; 22:ijms222312808. [PMID: 34884615 PMCID: PMC8657965 DOI: 10.3390/ijms222312808] [Citation(s) in RCA: 211] [Impact Index Per Article: 70.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/24/2021] [Accepted: 11/24/2021] [Indexed: 01/07/2023] Open
Abstract
Human cytochrome P450 (CYP) enzymes, as membrane-bound hemoproteins, play important roles in the detoxification of drugs, cellular metabolism, and homeostasis. In humans, almost 80% of oxidative metabolism and approximately 50% of the overall elimination of common clinical drugs can be attributed to one or more of the various CYPs, from the CYP families 1–3. In addition to the basic metabolic effects for elimination, CYPs are also capable of affecting drug responses by influencing drug action, safety, bioavailability, and drug resistance through metabolism, in both metabolic organs and local sites of action. Structures of CYPs have recently provided new insights into both understanding the mechanisms of drug metabolism and exploiting CYPs as drug targets. Genetic polymorphisms and epigenetic changes in CYP genes and environmental factors may be responsible for interethnic and interindividual variations in the therapeutic efficacy of drugs. In this review, we summarize and highlight the structural knowledge about CYPs and the major CYPs in drug metabolism. Additionally, genetic and epigenetic factors, as well as several intrinsic and extrinsic factors that contribute to interindividual variation in drug response are also reviewed, to reveal the multifarious and important roles of CYP-mediated metabolism and elimination in drug therapy.
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Song Y, Li C, Liu G, Liu R, Chen Y, Li W, Cao Z, Zhao B, Lu C, Liu Y. Drug-Metabolizing Cytochrome P450 Enzymes Have Multifarious Influences on Treatment Outcomes. Clin Pharmacokinet 2021; 60:585-601. [PMID: 33723723 DOI: 10.1007/s40262-021-01001-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2021] [Indexed: 02/06/2023]
Abstract
Drug metabolism is a critical process for the removal of unwanted substances from the body. In humans, approximately 80% of oxidative metabolism and almost 50% of the overall elimination of commonly used drugs can be attributed to one or more of various cytochrome P450 (CYP) enzymes from CYP families 1-3. In addition to the basic metabolic effects for elimination, CYP enzymes in vivo are capable of affecting the treatment outcomes in many cases. Drug-metabolizing CYP enzymes are mainly expressed in the liver and intestine, the two principal drug oxidation and elimination organs, where they can significantly influence the drug action, safety, and bioavailability by mediating phase I metabolism and first-pass metabolism. Furthermore, CYP-mediated local drug metabolism in the sites of action may also have the potential to impact drug response, according to the literature in recent years. This article underlines the ability of CYP enzymes to influence treatment outcomes by discussing CYP-mediated diversified drug metabolism in primary metabolic sites (liver and intestine) and typical action sites (brain and tumors) according to their expression levels and metabolic activity. Moreover, intrinsic and extrinsic factors of personal differential CYP phenotypes that contribute to interindividual variation of treatment outcomes are also reviewed to introduce the multifarious pivotal role of CYP-mediated metabolism and clearance in drug therapy.
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Affiliation(s)
- Yurong Song
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Chenxi Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Guangzhi Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Rui Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Youwen Chen
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Wen Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Zhiwen Cao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Baosheng Zhao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China.
| | - Cheng Lu
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Yuanyan Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China.
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van Koetsveld PM, Creemers SG, Dogan F, Franssen GJH, de Herder WW, Feelders RA, Hofland LJ. The Efficacy of Mitotane in Human Primary Adrenocortical Carcinoma Cultures. J Clin Endocrinol Metab 2020; 105:5581636. [PMID: 31586196 PMCID: PMC7006231 DOI: 10.1210/clinem/dgz001] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 09/06/2019] [Indexed: 12/31/2022]
Abstract
CONTEXT Patients with adrenocortical carcinoma (ACC) often fail mitotane treatment and deal with severe toxicity, marking the relevance of predictive parameters for treatment outcome. OBJECTIVE Determine the effects of mitotane in primary ACC cultures, and correlate sensitivity with patient and tumor characteristics. METHODS In 32 primary ACC cultures, the effects of mitotane on cell growth and cortisol production were determined. RRM1, SOAT1, and CYP2W1 expression were assessed using reverse transcription-polymerase chain reaction and immunohistochemistry. RESULTS The median percentage cell amount inhibition in primary ACC cultures at 50 µM mitotane was 57%. Seven patients were classified as nonresponders, 14 as partial responders, and 11 as responders. The mean median effective concentration (EC50) value of mitotane for inhibition of cell amount in responders was 14.2 µM (95% CI, 11.3-17.9), in partial responders 41.6 µM (95% CI, 33.5-51.8), and could not be calculated in nonresponders. The percentage cortisol-producing ACC was 14%, 43%, and 73% for nonresponders, partial responders, and responders (P = 0.068). Mitotane inhibited cortisol production with a mean EC50 of 1.4 µM (95% CI, 0.9-2.1), which was considerably lower than the EC50 on cell growth. RRM1, SOAT1, and CYP2W1 expression levels were not predictive for mitotane sensitivity in vitro. CONCLUSION Direct antitumor effects of mitotane on human primary ACC cultures are highly variable between patients, reflecting heterogeneous responses in patients. Cortisol was inhibited at lower concentrations, compared with its effect on cell amount. Cortisol secretion by ACC might be associated with enhanced mitotane sensitivity due to increased direct antitumor effects of mitotane.
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Affiliation(s)
- Peter M van Koetsveld
- Department of Internal Medicine, Division of Endocrinology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Sara G Creemers
- Department of Internal Medicine, Division of Endocrinology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Fadime Dogan
- Department of Internal Medicine, Division of Endocrinology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Gaston J H Franssen
- Department of Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Wouter W de Herder
- Department of Internal Medicine, Division of Endocrinology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Richard A Feelders
- Department of Internal Medicine, Division of Endocrinology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Leo J Hofland
- Department of Internal Medicine, Division of Endocrinology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
- Correspondence: L.J. Hofland, PhD, Department of Internal Medicine, Division of Endocrinology, Room Ee514, Erasmus Medical Center, P.O. box 2040, 3000 CA Rotterdam, The Netherlands. E-mail:
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6
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The Multifarious Link between Cytochrome P450s and Cancer. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:3028387. [PMID: 31998435 PMCID: PMC6964729 DOI: 10.1155/2020/3028387] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 12/08/2019] [Accepted: 12/18/2019] [Indexed: 02/07/2023]
Abstract
Cancer is a leading cause of death worldwide. Cytochrome P450s (P450s) play an important role in the metabolism of endogenous as well as exogenous substances, especially drugs. Moreover, many P450s can serve as targets for disease therapy. Increasing reports of epidemiological, diagnostic, and clinical research indicate that P450s are enzymes that play a major part in the formation of cancer, prevention, and metastasis. The purposes of this review are to shed light on the current state of knowledge about the cancer molecular mechanism involving P450s and to summarize the link between the cancer effects and the participation of P450s.
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7
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Role of bioactive lipofishins in prevention of inflammation and colon cancer. Semin Cancer Biol 2019; 56:175-184. [DOI: 10.1016/j.semcancer.2017.11.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 11/18/2017] [Indexed: 02/07/2023]
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8
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Reed KM, Mendoza KM, Abrahante JE, Coulombe RA. Comparative Response of the Hepatic Transcriptomes of Domesticated and Wild Turkey to Aflatoxin B₁. Toxins (Basel) 2018; 10:toxins10010042. [PMID: 29342849 PMCID: PMC5793129 DOI: 10.3390/toxins10010042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/08/2018] [Accepted: 01/10/2018] [Indexed: 12/15/2022] Open
Abstract
The food-borne mycotoxin aflatoxin B1 (AFB1) poses a significant risk to poultry, which are highly susceptible to its hepatotoxic effects. Domesticated turkeys (Meleagris gallopavo) are especially sensitive, whereas wild turkeys (M. g. silvestris) are more resistant. AFB1 toxicity entails bioactivation by hepatic cytochrome P450s to the electrophilic exo-AFB1-8,9-epoxide (AFBO). Domesticated turkeys lack functional hepatic GST-mediated detoxification of AFBO, and this is largely responsible for the differences in resistance between turkey types. This study was designed to characterize transcriptional changes induced in turkey livers by AFB1, and to contrast the response of domesticated (susceptible) and wild (more resistant) birds. Gene expression responses to AFB1 were examined using RNA-sequencing. Statistically significant differences in gene expression were observed among treatment groups and between turkey types. Expression analysis identified 4621 genes with significant differential expression (DE) in AFB1-treated birds compared to controls. Characterization of DE transcripts revealed genes dis-regulated in response to toxic insult with significant association of Phase I and Phase II genes and others important in cellular regulation, modulation of apoptosis, and inflammatory responses. Constitutive expression of GSTA3 was significantly higher in wild birds and was significantly higher in AFB1-treated birds when compared to controls for both genetic groups. This pattern was also observed by qRT-PCR in other wild and domesticated turkey strains. Results of this study emphasize the differential response of these genetically distinct birds, and identify genes and pathways that are differentially altered in aflatoxicosis.
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Affiliation(s)
- Kent M Reed
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN 55108, USA.
| | - Kristelle M Mendoza
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN 55108, USA.
| | - Juan E Abrahante
- University of Minnesota Informatics Institute, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Roger A Coulombe
- Department of Animal, Dairy and Veterinary Sciences, College of Agriculture, Utah State University, Logan, UT 84322, USA.
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Li Y, Kang X, Yang G, Dai P, Chen C, Wang H. Identification of Genetic Polymorphisms of CYP2W1 in the Three Main Chinese Ethnicities: Han, Tibetan, and Uighur. Drug Metab Dispos 2016; 44:1510-5. [PMID: 27307299 DOI: 10.1124/dmd.115.069153] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 06/14/2016] [Indexed: 11/22/2022] Open
Abstract
CYP2W1 is an orphan member of the cytochrome P450 superfamily. Recently, CYP2W1 has gained great research interest because of its unknown enzymatic function and tumor-specific expression property. This study aims to investigate the genetic polymorphisms of the CYP2W1 gene in Chinese populations and explore the functions of the detected variants. All of the nine exons and exon-intron junction regions of the CYP2W1 gene were sequenced in 150 Chinese subjects, including 50 Han Chinese, 50 Tibetans, and 50 Uighurs. A total of 26 genetic variants were identified in this study, and 19 polymorphisms were detected in each population. Frequency comparison between populations showed that nine variants exhibited significantly different allelic distributions. A total of 12 different haplotypes were inferred from 150 samples by using the genotype data of nine exonic variants found in this study. CYP2W1*1A, *1B, *2, *4, and *6 were detected as the main alleles/haplotypes. Moreover, one, three, and two ethnically specific haplotypes were observed in the Han, Tibetan, and Uighur samples, respectively. Then, the effects of four detected missense mutations (Ala181Thr, Gly376Ser, Val432Ile, and Pro488Leu) on the CYP2W1 protein function were predicted using three in silico tools: Polymorphism Phenotyping v2, Sorts Intolerant from Tolerant, and MutationTaster. The results showed that Gly376Ser and Pro488Leu may have deleterious effects. In summary, this study showed that the genetic pattern of CYP2W1 is interethnically different among the three Chinese populations, and this finding can extend our understanding of population genetics of CYP2W1 in the Chinese population.
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Affiliation(s)
- Yanwei Li
- National Engineering Research Center for Miniaturized Detection Systems, School of Life Sciences, Northwest University, Xi'an, China
| | - Xing Kang
- National Engineering Research Center for Miniaturized Detection Systems, School of Life Sciences, Northwest University, Xi'an, China
| | - Ge Yang
- National Engineering Research Center for Miniaturized Detection Systems, School of Life Sciences, Northwest University, Xi'an, China
| | - Penggao Dai
- National Engineering Research Center for Miniaturized Detection Systems, School of Life Sciences, Northwest University, Xi'an, China
| | - Chao Chen
- National Engineering Research Center for Miniaturized Detection Systems, School of Life Sciences, Northwest University, Xi'an, China
| | - Huijuan Wang
- National Engineering Research Center for Miniaturized Detection Systems, School of Life Sciences, Northwest University, Xi'an, China
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Zhao Y, Wan D, Yang J, Hammock BD, Ortiz de Montellano PR. Catalytic Activities of Tumor-Specific Human Cytochrome P450 CYP2W1 Toward Endogenous Substrates. ACTA ACUST UNITED AC 2016; 44:771-80. [PMID: 26936974 DOI: 10.1124/dmd.116.069633] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Accepted: 02/29/2016] [Indexed: 01/14/2023]
Abstract
CYP2W1 is a recently discovered human cytochrome P450 enzyme with a distinctive tumor-specific expression pattern. We show here that CYP2W1 exhibits tight binding affinities for retinoids, which have low nanomolar binding constants, and much poorer binding constants in the micromolar range for four other ligands. CYP2W1 converts all-transretinoic acid (atRA) to 4-hydroxyatRA and all-transretinol to 4-OH all-transretinol, and it also oxidizes retinal. The enzyme much less efficiently oxidizes 17β-estradiol to 2-hydroxy-(17β)-estradiol and farnesol to a monohydroxylated product; arachidonic acid is, at best, a negligible substrate. These findings indicate that CYP2W1 probably plays an important role in localized retinoid metabolism that may be intimately linked to its involvement in tumor development.
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Affiliation(s)
- Yan Zhao
- Department of Pharmaceutical Chemistry, University of California, San Francisco (Y.Z., P.R.O.M.) and Department of Entomology and Cancer Center, University of California, Davis, CA (D.W., J.Y., B.D.H.)
| | - Debin Wan
- Department of Pharmaceutical Chemistry, University of California, San Francisco (Y.Z., P.R.O.M.) and Department of Entomology and Cancer Center, University of California, Davis, CA (D.W., J.Y., B.D.H.)
| | - Jun Yang
- Department of Pharmaceutical Chemistry, University of California, San Francisco (Y.Z., P.R.O.M.) and Department of Entomology and Cancer Center, University of California, Davis, CA (D.W., J.Y., B.D.H.)
| | - Bruce D Hammock
- Department of Pharmaceutical Chemistry, University of California, San Francisco (Y.Z., P.R.O.M.) and Department of Entomology and Cancer Center, University of California, Davis, CA (D.W., J.Y., B.D.H.)
| | - Paul R Ortiz de Montellano
- Department of Pharmaceutical Chemistry, University of California, San Francisco (Y.Z., P.R.O.M.) and Department of Entomology and Cancer Center, University of California, Davis, CA (D.W., J.Y., B.D.H.)
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Wilk-Zasadna I, Bernasconi C, Pelkonen O, Coecke S. Biotransformation in vitro: An essential consideration in the quantitative in vitro-to-in vivo extrapolation (QIVIVE) of toxicity data. Toxicology 2014; 332:8-19. [PMID: 25456264 DOI: 10.1016/j.tox.2014.10.006] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 06/11/2014] [Accepted: 10/11/2014] [Indexed: 12/14/2022]
Abstract
Early consideration of the multiplicity of factors that govern the biological fate of foreign compounds in living systems is a necessary prerequisite for the quantitative in vitro-in vivo extrapolation (QIVIVE) of toxicity data. Substantial technological advances in in vitro methodologies have facilitated the study of in vitro metabolism and the further use of such data for in vivo prediction. However, extrapolation to in vivo with a comfortable degree of confidence, requires continuous progress in the field to address challenges such as e.g., in vitro evaluation of chemical-chemical interactions, accounting for individual variability but also analytical challenges for ensuring sensitive measurement technologies. This paper discusses the current status of in vitro metabolism studies for QIVIVE extrapolation, serving today's hazard and risk assessment needs. A short overview of the methodologies for in vitro metabolism studies is given. Furthermore, recommendations for priority research and other activities are provided to ensure further widespread uptake of in vitro metabolism methods in 21st century toxicology. The need for more streamlined and explicitly described integrated approaches to reflect the physiology and the related dynamic and kinetic processes of the human body is highlighted i.e., using in vitro data in combination with in silico approaches.
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Affiliation(s)
- Iwona Wilk-Zasadna
- Systems Toxicology Unit/EURL ECVAM, Institute for Health and Consumer Protection, European Commission Joint Research Centre, Ispra, Varese I-21027, Italy
| | - Camilla Bernasconi
- Systems Toxicology Unit/EURL ECVAM, Institute for Health and Consumer Protection, European Commission Joint Research Centre, Ispra, Varese I-21027, Italy
| | - Olavi Pelkonen
- Department of Pharmacology and Toxicology, Institute of Biomedicine, University of Oulu, Oulu, Finland
| | - Sandra Coecke
- Systems Toxicology Unit/EURL ECVAM, Institute for Health and Consumer Protection, European Commission Joint Research Centre, Ispra, Varese I-21027, Italy.
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Ronchi CL, Sbiera S, Volante M, Steinhauer S, Scott-Wild V, Altieri B, Kroiss M, Bala M, Papotti M, Deutschbein T, Terzolo M, Fassnacht M, Allolio B. CYP2W1 is highly expressed in adrenal glands and is positively associated with the response to mitotane in adrenocortical carcinoma. PLoS One 2014; 9:e105855. [PMID: 25144458 PMCID: PMC4140842 DOI: 10.1371/journal.pone.0105855] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 07/26/2014] [Indexed: 12/24/2022] Open
Abstract
Background Adrenocortical tumors comprise frequent adenomas (ACA) and rare carcinomas (ACC). Human cytochrome P450 2W1 (CYP2W1) is highly expressed in some cancers holding the potential to activate certain drugs into tumor cytotoxins. Objective To investigate the CYP2W1 expression in adrenal samples and its relationship with clinical outcome in ACC. Material and Methods CYP2W1 expression was investigated by qRT-PCR in 13 normal adrenal glands, 32 ACA, 25 ACC, and 9 different non-adrenal normal tissue samples and by immunohistochemistry in 352 specimens (23 normal adrenal glands, 33 ACA, 239 ACC, 67 non-adrenal normal or neoplastic samples). Results CYP2W1 mRNA expression was absent/low in normal non-adrenal tissues, but high in normal and neoplastic adrenal glands (all P<0.01 vs non-adrenal normal tissues). Accordingly, CYP2W1 immunoreactivity was absent/low (H-score 0–1) in 72% of non-adrenal normal tissues, but high (H-score 2–3) in 44% of non-adrenal cancers, in 65% of normal adrenal glands, in 62% of ACAs and in 50% of ACCs (all P<0.001 vs non-adrenal normal tissues), being significantly increased in steroid-secreting compared to non-secreting tumors. In ACC patients treated with mitotane only, high CYP2W1 immunoreactivity adjusted for ENSAT stage was associated with longer overall survival and time to progression (P<0.05 and P<0.01, respectively), and with a better response to therapy both as palliative (response/stable disease in 42% vs 6%, P<0.01) or adjuvant option (absence of disease recurrence in 69% vs 45%, P<0.01). Conclusion CYP2W1 is highly expressed in both normal and neoplastic adrenal glands making it a promising tool for targeted therapy in ACC. Furthermore, CYP2W1 may represent a new predictive marker for the response to mitotane treatment.
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Affiliation(s)
- Cristina L. Ronchi
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Wuerzburg, Wuerzburg, Germany
- * E-mail:
| | - Silviu Sbiera
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Wuerzburg, Wuerzburg, Germany
| | - Marco Volante
- Department of Oncology, University of Turin, San Luigi Hospital, Turin, Italy
| | - Sonja Steinhauer
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Wuerzburg, Wuerzburg, Germany
| | | | - Barbara Altieri
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Wuerzburg, Wuerzburg, Germany
| | - Matthias Kroiss
- Comprehensive Cancer Center Mainfranken, University Hospital, University of Wuerzburg, Wuerzburg, Germany
| | - Margarita Bala
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Wuerzburg, Wuerzburg, Germany
| | - Mauro Papotti
- Department of Oncology, University of Turin, San Luigi Hospital, Turin, Italy
| | - Timo Deutschbein
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Wuerzburg, Wuerzburg, Germany
| | - Massimo Terzolo
- Division of Internal Medicine I, University of Turin, San Luigi Hospital, Turin, Italy
| | - Martin Fassnacht
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Wuerzburg, Wuerzburg, Germany
- Comprehensive Cancer Center Mainfranken, University Hospital, University of Wuerzburg, Wuerzburg, Germany
| | - Bruno Allolio
- Endocrine and Diabetes Unit, Department of Internal Medicine I, University Hospital, University of Wuerzburg, Wuerzburg, Germany
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13
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Differential expression of cytochrome P450 enzymes in normal and tumor tissues from childhood rhabdomyosarcoma. PLoS One 2014; 9:e93261. [PMID: 24699256 PMCID: PMC3974704 DOI: 10.1371/journal.pone.0093261] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 03/02/2014] [Indexed: 12/11/2022] Open
Abstract
Intratumoral expression of genes encoding Cytochrome P450 enzymes (CYP) might play a critical role not only in cancer development but also in the metabolism of anticancer drugs. The purpose of this study was to compare the mRNA expression patterns of seven representative CYPs in paired tumor and normal tissue of child patients with rabdomyosarcoma (RMS). Using real time quantitative RT-PCR, the gene expression pattern of CYP1A1, CYP1A2, CYP1B1, CYP2E1, CYP2W1, CYP3A4, and CYP3A5 were analyzed in tumor and adjacent non-tumor tissues from 13 child RMS patients. Protein concentration of CYPs was determined using Western blot. The expression levels were tested for correlation with the clinical and pathological data of the patients. Our data showed that the expression levels of CYP1A1 and CYP1A2 were negligible. Elevated expression of CYP1B1 mRNA and protein was detected in most RMS tumors and adjacent normal tissues. Most cancerous samples exhibit higher levels of both CYP3A4 and CYP3A5 compared with normal tissue samples. Expression of CYP2E1 mRNA was found to be significantly higher in tumor tissue, however no relation was found with protein levels. CYP2W1 mRNA and/or protein are mainly expressed in tumors. In conclusion, we defined the CYP gene expression profile in tumor and paired normal tissue of child patients with RMS. The overexpression of CYP2W1, CYP3A4 and CYP3A5 in tumor tissues suggests that they may be involved in RMS chemoresistance; furthermore, they may be exploited for the localized activation of anticancer prodrugs.
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14
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Gundert-Remy U, Bernauer U, Blömeke B, Döring B, Fabian E, Goebel C, Hessel S, Jäckh C, Lampen A, Oesch F, Petzinger E, Völkel W, Roos PH. Extrahepatic metabolism at the body's internal–external interfaces. Drug Metab Rev 2014; 46:291-324. [DOI: 10.3109/03602532.2014.900565] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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15
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Brown GT, Cash BG, Blihoghe D, Johansson P, Alnabulsi A, Murray GI. The expression and prognostic significance of retinoic acid metabolising enzymes in colorectal cancer. PLoS One 2014; 9:e90776. [PMID: 24608339 PMCID: PMC3946526 DOI: 10.1371/journal.pone.0090776] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Accepted: 02/04/2014] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer is one of the most common types of cancer with over fifty percent of patients presenting at an advanced stage. Retinoic acid is a metabolite of vitamin A and is essential for normal cell growth and aberrant retinoic acid metabolism is implicated in tumourigenesis. This study has profiled the expression of retinoic acid metabolising enzymes using a well characterised colorectal cancer tissue microarray containing 650 primary colorectal cancers, 285 lymph node metastasis and 50 normal colonic mucosal samples. Immunohistochemistry was performed on the tissue microarray using monoclonal antibodies which we have developed to the retinoic acid metabolising enzymes CYP26A1, CYP26B1, CYP26C1 and lecithin retinol acyl transferase (LRAT) using a semi-quantitative scoring scheme to assess expression. Moderate or strong expression of CYP26A1was observed in 32.5% of cancers compared to 10% of normal colonic epithelium samples (p<0.001). CYP26B1 was moderately or strongly expressed in 25.2% of tumours and was significantly less expressed in normal colonic epithelium (p<0.001). CYP26C1 was not expressed in any sample. LRAT also showed significantly increased expression in primary colorectal cancers compared with normal colonic epithelium (p<0.001). Strong CYP26B1 expression was significantly associated with poor prognosis (HR = 1.239, 95%CI = 1.104-1.390, χ(2) = 15.063, p = 0.002). Strong LRAT was also associated with poorer outcome (HR = 1.321, 95%CI = 1.034-1.688, χ(2) = 5.039, p = 0.025). In mismatch repair proficient tumours strong CYP26B1 (HR = 1.330, 95%CI = 1.173-1.509, χ(2)= 21.493, p<0.001) and strong LRAT (HR = 1.464, 95%CI = 1.110-1.930, χ(2) = 7.425, p = 0.006) were also associated with poorer prognosis. This study has shown that the retinoic acid metabolising enzymes CYP26A1, CYP26B1 and LRAT are significantly overexpressed in colorectal cancer and that CYP26B1 and LRAT are significantly associated with prognosis both in the total cohort and in those tumours which are mismatch repair proficient. CYP26B1 was independently prognostic in a multivariate model both in the whole patient cohort (HR = 1.177, 95%CI = 1.020-1.216, p = 0.026) and in mismatch repair proficient tumours (HR = 1.255, 95%CI = 1.073-1.467, p = 0.004).
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Affiliation(s)
- Gordon T Brown
- Pathology, Division of Applied Medicine, School of Medicine and Dentistry, University of Aberdeen, Aberdeen, United Kingdom
| | - Beatriz Gimenez Cash
- Vertebrate Antibodies, Zoology Building, Tillydrone Avenue, Aberdeen, United Kingdom
| | - Daniela Blihoghe
- George S. Wise Faculty of Life Sciences, Department of Zoology, Tel Aviv University, Tel Aviv, Israel
| | - Petronella Johansson
- The Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Ayham Alnabulsi
- Vertebrate Antibodies, Zoology Building, Tillydrone Avenue, Aberdeen, United Kingdom
| | - Graeme I Murray
- Pathology, Division of Applied Medicine, School of Medicine and Dentistry, University of Aberdeen, Aberdeen, United Kingdom
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16
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Sheldrake HM, Travica S, Johansson I, Loadman PM, Sutherland M, Elsalem L, Illingworth N, Cresswell AJ, Reuillon T, Shnyder SD, Mkrtchian S, Searcey M, Ingelman-Sundberg M, Patterson LH, Pors K. Re-engineering of the Duocarmycin Structural Architecture Enables Bioprecursor Development Targeting CYP1A1 and CYP2W1 for Biological Activity. J Med Chem 2013; 56:6273-7. [DOI: 10.1021/jm4000209] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Helen M. Sheldrake
- Institute
of Cancer Therapeutics, University of Bradford, Bradford BD7 1DP, U.K
| | - Sandra Travica
- Department of Physiology and
Pharmacology, Karolinska Institute, SE-17177
Stockholm, Sweden
| | - Inger Johansson
- Department of Physiology and
Pharmacology, Karolinska Institute, SE-17177
Stockholm, Sweden
| | - Paul M. Loadman
- Institute
of Cancer Therapeutics, University of Bradford, Bradford BD7 1DP, U.K
| | - Mark Sutherland
- Institute
of Cancer Therapeutics, University of Bradford, Bradford BD7 1DP, U.K
| | - Lina Elsalem
- Institute
of Cancer Therapeutics, University of Bradford, Bradford BD7 1DP, U.K
| | - Nicola Illingworth
- Institute
of Cancer Therapeutics, University of Bradford, Bradford BD7 1DP, U.K
| | | | - Tristan Reuillon
- Institute
of Cancer Therapeutics, University of Bradford, Bradford BD7 1DP, U.K
| | - Steven D. Shnyder
- Institute
of Cancer Therapeutics, University of Bradford, Bradford BD7 1DP, U.K
| | - Souren Mkrtchian
- Department of Physiology and
Pharmacology, Karolinska Institute, SE-17177
Stockholm, Sweden
| | - Mark Searcey
- School
of Pharmacy, University of East Anglia,
Norwich Research Park, Norwich
NR4 7TJ, U.K
| | | | | | - Klaus Pors
- Institute
of Cancer Therapeutics, University of Bradford, Bradford BD7 1DP, U.K
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17
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Travica S, Pors K, Loadman PM, Shnyder SD, Johansson I, Alandas MN, Sheldrake HM, Mkrtchian S, Patterson LH, Ingelman-Sundberg M. Colon Cancer–Specific Cytochrome P450 2W1 Converts Duocarmycin Analogues into Potent Tumor Cytotoxins. Clin Cancer Res 2013; 19:2952-61. [DOI: 10.1158/1078-0432.ccr-13-0238] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Nandekar PP, Sangamwar AT. Cytochrome P450 1A1-mediated anticancer drug discovery: in silico findings. Expert Opin Drug Discov 2012; 7:771-89. [PMID: 22716293 DOI: 10.1517/17460441.2012.698260] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Target-specific drugs may offer fewer side/adverse effects in comparison with other anticancer agents and thus save normal healthy cells to a greater extent. The selective overexpression of cytochrome P450 1A1 (CYP1A1) in tumor cells induces the metabolism of benzothiazole and aminoflavone compounds to their reactive species, which are responsible for DNA adduct formation and cell death. This review encompasses the novelty of CYP1A1 as an anticancer drug target and explores the possible in silico strategies that would be applicable in the discovery and development of future antitumor compounds. AREAS COVERED This review highlights the various ligand-based and target-based in silico methodologies that were efficiently used in exploration of CYP1A1 as a novel antitumor target. These methodologies include electronic structure analysis, CoMFA studies, homology modeling, molecular docking, molecular dynamics analysis, pharmacophore mapping and quantitative structure activity relationship (QSAR) studies. It also focuses on the various approaches used in the development of the lysyl amide prodrug of 5F-203 (NSC710305) and dimethanesulfonate salt of 5-aminoflavone (NSC710464) as clinical candidates from their less potent analogues. EXPERT OPINION Selective overexpression of CYP1A1 in cancer cells offers tumor-specific drug design to ameliorate the current adverse effects associated with existing antitumor agents. Medicinal chemistry and in vitro driven approaches, in combination with knowledge-based drug design and by using the currently available tools of in silico methodologies, would certainly make it possible to design and develop novel anticancer compounds targeting CYP1A1.
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Affiliation(s)
- Prajwal P Nandekar
- National Institute of Pharmaceutical Education and Research (NIPER), Department of Pharmacoinformatics, S.A.S. Nagar (Mohali), Punjab-160062, India
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19
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Tamási V, Monostory K, Prough RA, Falus A. Role of xenobiotic metabolism in cancer: involvement of transcriptional and miRNA regulation of P450s. Cell Mol Life Sci 2011; 68:1131-46. [PMID: 21184128 PMCID: PMC11115005 DOI: 10.1007/s00018-010-0600-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Revised: 11/04/2010] [Accepted: 11/18/2010] [Indexed: 02/06/2023]
Abstract
Cytochrome P450 enzymes (P450s) are important targets in cancer, due to their role in xenobiotic metabolism. Since P450s are the "bridges" between the environment and our body, their function can be linked in many ways to carcinogenesis: they activate dietary and environmental components to ultimate carcinogens (i), the cancer tissue maintains its drug resistance with altered expression of P450s (ii), P450s metabolize (sometimes activate) drugs used for cancer treatment (iii) and they are potential targets for anticancer therapy (iiii). These highly polymorphic enzymes are regulated at multiple molecular levels. Regulation is as important as genetic difference in the existing individual variability in P450 activity. In this review, examples of the transcriptional (DNA methylation, histone modification, modulation by xenosensors) and post-transcriptional (miRNA) regulation will be presented and thereby introduce potential molecular targets at which the metabolism of anticancer drugs, the elimination of cancerogenes or the progress of carcinogenesis could be affected.
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Affiliation(s)
- Viola Tamási
- Department of Genetics, Cell- and Immunobiology, Faculty of Medicine, Semmelweis University, PO Box 370, Budapest, 1445, Hungary.
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20
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Gervasini G, de Murillo SG, Ladero JM, Agúndez JAG. CYP2W1 variant alleles in Caucasians and association of the CYP2W1 G541A (Ala181Thr) polymorphism with increased colorectal cancer risk. Pharmacogenomics 2011; 11:919-25. [PMID: 20602611 DOI: 10.2217/pgs.10.66] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIMS To detect differences in the frequency of the known nonsynonymous CYP2W1 polymorphisms between colorectal cancer patients and healthy subjects. MATERIALS & METHODS The study group consisted of 150 colorectal patients and 263 controls. The presence of five nonsynonymous CYP2W1 polymorphisms was analyzed by novel amplification-restriction methods. RESULTS Two nonsynonymous SNPs causing the amino acid substitutions Val432Ile and Gln482His were monomorphic in the population study. Two nonsynonymous SNPs previously unknown in Caucasians, 1463T (rs3808348) and 173C (no rs number assigned), were detected in the population study, although these were not associated with colorectal cancer risk. Regarding the 541G/A polymorphism (rs3735684), the 541G allele (odds ratio: 2.2; 95% CI: 1.2-4.1) and the 541GG genotype (odds ratio: 2.06; 95% CI: 1.1-3.9) were associated with increased colorectal cancer risk in the population studied. Conversely, the 173C-541A-1463C haplotype (odds ratio: 0.46; 95% CI: 0.2-0.9) showed a protective odds ratio value. CONCLUSION CYP2W1 variant alleles are common among Caucasian individuals and, of these, the CYP2W1 G541A (Ala181Thr) polymorphism is associated with increased colorectal cancer risk.
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Affiliation(s)
- Guillermo Gervasini
- Department of Pharmacology, School of Medicine, University of Extremadura, 06071 Badajoz, Spain.
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21
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Exon-level transcriptome profiling in murine breast cancer reveals splicing changes specific to tumors with different metastatic abilities. PLoS One 2010; 5:e11981. [PMID: 20700505 PMCID: PMC2917353 DOI: 10.1371/journal.pone.0011981] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Accepted: 07/08/2010] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Breast cancer is the second most frequent type of cancer affecting women. We are increasingly aware that changes in mRNA splicing are associated with various characteristics of cancer. The most deadly aspect of cancer is metastasis, the process by which cancer spreads from the primary tumor to distant organs. However, little is known specifically about the involvement of alternative splicing in the formation of macroscopic metastases. Our study investigates transcript isoform changes that characterize tumors of different abilities to form growing metastases. METHODS AND FINDINGS To identify alternative splicing events (ASEs) that are associated with the fully metastatic phenotype in breast cancer, we used Affymetrix Exon Microarrays to profile mRNA isoform variations genome-wide in weakly metastatic (168FARN and 4T07) and highly metastatic (4T1) mammary carcinomas. Statistical analysis identified significant expression changes in 7606 out of 155,994 (4%) exons and in 1725 out of 189,460 (1%) intronic regions, which affect 2623 out of 16,654 (16%) genes. These changes correspond to putative alternative isoforms-several of which are novel-that are differentially expressed between tumors of varying metastatic phenotypes. Gene pathway analysis showed that 1224 of genes expressing alternative isoforms were involved in cell growth, cell interactions, cell proliferation, cell migration and cell death and have been previously linked to cancers and genetic disorders. We chose ten predicted splice variants for RT-PCR validation, eight of which were successfully confirmed (MED24, MFI2, SRRT, CD44, CLK1 and HNRNPH1). These include three novel intron retentions in CD44, a gene in which isoform variations have been previously associated with the metastasis of several cancers. CONCLUSION Our findings reveal that various genes are differently spliced and/or expressed in association with the metastatic phenotype of tumor cells. Identification of metastasis-specific isoforms may contribute to the development of improved breast cancer stage identification and targeted therapies.
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22
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Li W, Tang Y, Hoshino T, Neya S. Molecular modeling of human cytochrome P450 2W1 and its interactions with substrates. J Mol Graph Model 2009; 28:170-6. [PMID: 19596602 DOI: 10.1016/j.jmgm.2009.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Revised: 06/10/2009] [Accepted: 06/13/2009] [Indexed: 10/20/2022]
Abstract
The human cytochrome P450 2W1 (CYP2W1) was categorized into the so-called "orphan" CYPs because of its unknown enzymatic function. However, recent studies showed that the recombinant CYP2W1 exhibited broad catalytic activity towards several chemicals. Furthermore, this enzyme was selectively expressed in some forms of cancers, whereas a very low expression was found in human normal issues. These render CYP2W1 as a potential drug target for cancer therapy. At present, however, little information is available on the active site topology and the substrate binding modes of CYP2W1. In this study, the three-dimensional model of CYP2W1 was constructed using the homology modeling method. Two known substrates, benzphetamine and indole, were then docked into the active site, and refined by molecular dynamics simulations. The interaction energy between the substrates and the enzyme was calculated and analyzed by using the MM-GBSA method. The results indicated that the constructed CYP2W1 model can account for the regioselectivity of this enzyme towards the known substrates and van der Waals interactions were the driving force for the substrate binding. Several key residues were identified to be responsible for the binding of indole and benzphetamine with CYP2W1. These findings provide useful information for the detailed characterization of the biological roles of CYP2W1 and structure-based drug design of this enzyme.
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Affiliation(s)
- Weihua Li
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 263-8522, Japan
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23
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Schuster I, Bernhardt R. Inhibition of Cytochromes P450: Existing and New Promising Therapeutic Targets. Drug Metab Rev 2008; 39:481-99. [PMID: 17786634 DOI: 10.1080/03602530701498455] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Mammalian cytochromes P450 have been shown to play highly important roles in the metabolism of drugs and xenobiotics as well as in the biosynthesis of a variety of endogenous compounds, many of them displaying hormonal function. The role of P450s as therapeutic targets is still inadequately recognized although several P450 inhibitors became efficient drugs that even reached blockbuster status. Here, we try to give a comprehensive overview on cytochromes P450s, which are already well-established targets - particularly focussing on the treatment of infectious diseases, metabolic disorders and cancer - and on those, which have a high potential to become successful targets. In addition, the design of inhibitors of cytochromes P450 will be discussed.
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Affiliation(s)
- Inge Schuster
- Universität Wien, Fakultät für Lebenswissenschaften, Institut für Medizinische Chemie, Wien, Austria
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Purnapatre K, Khattar SK, Saini KS. Cytochrome P450s in the development of target-based anticancer drugs. Cancer Lett 2008; 259:1-15. [DOI: 10.1016/j.canlet.2007.10.024] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2007] [Revised: 10/16/2007] [Accepted: 10/17/2007] [Indexed: 11/16/2022]
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Hanzawa Y, Sasaki T, Mizugaki M, Ishikawa M, Hiratsuka M. Genetic Polymorphisms and Haplotype Structures of the Human CYP2W1 Gene in a Japanese Population. Drug Metab Dispos 2007; 36:349-52. [DOI: 10.1124/dmd.107.019141] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Cummings BS. Phospholipase A2 as targets for anti-cancer drugs. Biochem Pharmacol 2007; 74:949-59. [PMID: 17531957 DOI: 10.1016/j.bcp.2007.04.021] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2007] [Revised: 04/23/2007] [Accepted: 04/24/2007] [Indexed: 02/04/2023]
Abstract
Phospholipase A(2) (PLA(2)) are esterases that cleave glycerophospholipids to release fatty acids and lysophospholipids. Inhibition of PLA(2) alters cancer cell growth and death in vitro and PLA(2) expression is increased in breast, lung, and prostate cancers compared to control tissues. Thus, PLA(2) may be novel targets for chemotherapeutics. However, PLA(2) are a diverse family of enzymes, encompassing 19 members. The selectivity of these individual PLA(2) for phospholipids varies, as does their location within the cell, and tissue expression. Thus, their role in cancer may also vary. This review summarizes the expression of individual PLA(2) in cancers, focuses on the potential mechanisms by which these esterases mediate carcinogenesis, and suggests that select PLA(2) isoforms may be targets for anti-cancer drugs.
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Affiliation(s)
- Brian S Cummings
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA 30602, USA.
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