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Tchuente Tchuenmogne MA, Kammalac TN, Gohlke S, Kouipou RMT, Aslan A, Kuzu M, Comakli V, Demirdag R, Ngouela SA, Tsamo E, Sewald N, Lenta BN, Boyom FF. Compounds from Terminalia mantaly L. (Combretaceae) Stem Bark Exhibit Potent Inhibition against Some Pathogenic Yeasts and Enzymes of Metabolic Significance. MEDICINES (BASEL, SWITZERLAND) 2017; 4:E6. [PMID: 28930221 PMCID: PMC5597071 DOI: 10.3390/medicines4010006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/23/2016] [Accepted: 01/12/2017] [Indexed: 12/30/2022]
Abstract
Background: Pathogenic yeasts resistance to current drugs emphasizes the need for new, safe, and cost-effective drugs. Also, new inhibitors are needed to control the effects of enzymes that are implicated in metabolic dysfunctions such as cancer, obesity, and epilepsy. Methods: The anti-yeast extract from Terminalia mantaly (Combretaceae) was fractionated and the structures of the isolated compounds established by means of spectroscopic analysis and comparison with literature data. Activity was assessed against Candida albicans, C. parapsilosis and C. krusei using the microdilution method, and against four enzymes of metabolic significance: glucose-6-phosphate dehydrogenase, human erythrocyte carbonic anhydrase I and II, and glutathione S-transferase. Results: Seven compounds, 3,3'-di-O-methylellagic acid 4'-O-α-rhamnopyranoside; 3-O-methylellagic acid; arjungenin or 2,3,19,23-tetrahydroxyolean-12-en-28-oïc acid; arjunglucoside or 2,3,19,23-tetrahydroxyolean-12-en-28-oïc acid glucopyranoside; 2α,3α,24-trihydroxyolean-11,13(18)-dien-28-oïc acid; stigmasterol; and stigmasterol 3-O-β-d-glucopyranoside were isolated from the extract. Among those, 3,3'-di-O-methylellagic acid 4'-O-α-rhamnopyranoside, 3-O-methylellagic acid, and arjunglucoside showed anti-yeast activity comparable to that of reference fluconazole with minimal inhibitory concentrations (MIC) below 32 µg/mL. Besides, Arjunglucoside potently inhibited the tested enzymes with 50% inhibitory concentrations (IC50) below 4 µM and inhibitory constant (Ki) <3 µM. Conclusions: The results achieved indicate that further SAR studies will likely identify potent hit derivatives that should subsequently enter the drug development pipeline.
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Affiliation(s)
- Marthe Aimée Tchuente Tchuenmogne
- Laboratory of Natural Products and Organic Synthesis, Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 812, Yaoundé, Cameroon.
| | - Thierry Ngouana Kammalac
- Antimicrobial & Biocontrol Agents Unit, Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon.
| | - Sebastian Gohlke
- Chemistry Department, Organic and Bioorganic Chemistry, Bielefeld University, P.O. Box 100131, D-33501 Bielefeld, Germany.
| | - Rufin Marie Toghueo Kouipou
- Antimicrobial & Biocontrol Agents Unit, Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon.
| | - Abdulselam Aslan
- Faculty of Engineering, Department of Industrial Engineering, Giresun University, 28200 Giresun, Turkey.
| | - Muslum Kuzu
- Faculty of Pharmacy, Department of Basic Pharmaceutical Sciences, Agrı Ibrahim Cecen University, 04100 Agri, Turkey.
| | - Veysel Comakli
- School of Health, Department of Nutrition and Dietetics, Agrı Ibrahim Cecen University, 04100 Agri, Turkey.
| | - Ramazan Demirdag
- School of Health, Department of Nutrition and Dietetics, Agrı Ibrahim Cecen University, 04100 Agri, Turkey.
| | - Silvère Augustin Ngouela
- Laboratory of Natural Products and Organic Synthesis, Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 812, Yaoundé, Cameroon.
| | - Etienne Tsamo
- Laboratory of Natural Products and Organic Synthesis, Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 812, Yaoundé, Cameroon.
| | - Norbert Sewald
- Chemistry Department, Organic and Bioorganic Chemistry, Bielefeld University, P.O. Box 100131, D-33501 Bielefeld, Germany.
| | - Bruno Ndjakou Lenta
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé 1, Yaoundé, Cameroon.
| | - Fabrice Fekam Boyom
- Antimicrobial & Biocontrol Agents Unit, Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon.
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McLean LS, Watkins CN, Campbell P, Zylstra D, Rowland L, Amis LH, Scott L, Babb CE, Livingston WJ, Darwanto A, Davis WL, Senthil M, Sowers LC, Brantley E. Aryl Hydrocarbon Receptor Ligand 5F 203 Induces Oxidative Stress That Triggers DNA Damage in Human Breast Cancer Cells. Chem Res Toxicol 2015; 28:855-71. [PMID: 25781201 DOI: 10.1021/tx500485v] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Breast tumors often show profound sensitivity to exogenous oxidative stress. Investigational agent 2-(4-amino-3-methylphenyl)-5-fluorobenzothiazole (5F 203) induces aryl hydrocarbon receptor (AhR)-mediated DNA damage in certain breast cancer cells. Since AhR agonists often elevate intracellular oxidative stress, we hypothesize that 5F 203 increases reactive oxygen species (ROS) to induce DNA damage, which thwarts breast cancer cell growth. We found that 5F 203 induced single-strand break formation. 5F 203 enhanced oxidative DNA damage that was specific to breast cancer cells sensitive to its cytotoxic actions, as it did not increase oxidative DNA damage or ROS formation in nontumorigenic MCF-10A breast epithelial cells. In contrast, AhR agonist and procarcinogen benzo[a]pyrene and its metabolite, 1,6-benzo[a]pyrene quinone, induced oxidative DNA damage and ROS formation, respectively, in MCF-10A cells. In sensitive breast cancer cells, 5F 203 activated ROS-responsive kinases: c-Jun-N-terminal kinase (JNK) and p38 mitogen activated protein kinase (p38). AhR antagonists (alpha-naphthoflavone, CH223191) or antioxidants (N-acetyl-l-cysteine, EUK-134) attenuated 5F 203-mediated JNK and p38 activation, depending on the cell type. Pharmacological inhibition of AhR, JNK, or p38 attenuated 5F 203-mediated increases in intracellular ROS, apoptosis, and single-strand break formation. 5F 203 induced the expression of cytoglobin, an oxidative stress-responsive gene and a putative tumor suppressor, which was diminished with AhR, JNK, or p38 inhibition. Additionally, 5F 203-mediated increases in ROS production and cytoglobin were suppressed in AHR100 cells (AhR ligand-unresponsive MCF-7 breast cancer cells). Our data demonstrate 5F 203 induces ROS-mediated DNA damage at least in part via AhR, JNK, or p38 activation and modulates the expression of oxidative stress-responsive genes such as cytoglobin to confer its anticancer action.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - Lawrence C Sowers
- ⊥Department of Pharmacology and Toxicology, University of Texas Medical Branch at Galveston, Galveston, Texas 77555, United States
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Ho HY, Cheng ML, Chiu DTY. Glucose-6-phosphate dehydrogenase--beyond the realm of red cell biology. Free Radic Res 2014; 48:1028-48. [PMID: 24720642 DOI: 10.3109/10715762.2014.913788] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) is critical to the maintenance of NADPH pool and redox homeostasis. Conventionally, G6PD deficiency has been associated with hemolytic disorders. Most biochemical variants were identified and characterized at molecular level. Recently, a number of studies have shone light on the roles of G6PD in aspects of physiology other than erythrocytic pathophysiology. G6PD deficiency alters the redox homeostasis, and affects dysfunctional cell growth and signaling, anomalous embryonic development, and altered susceptibility to infection. The present article gives a brief review of basic science and clinical findings about G6PD, and covers the latest development in the field. Moreover, how G6PD status alters the susceptibility of the affected individuals to certain degenerative diseases is also discussed.
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Affiliation(s)
- H-Y Ho
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University , Kwei-san, Tao-yuan , Taiwan
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Olafson PU, Temeyer KB, Pruett JH. Multiple transcripts encode glucose 6-phosphate dehydrogenase in the southern cattle tick, Rhipicephalus (Boophilus) microplus. EXPERIMENTAL & APPLIED ACAROLOGY 2011; 53:147-165. [PMID: 20711800 DOI: 10.1007/s10493-010-9392-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Accepted: 07/16/2010] [Indexed: 05/29/2023]
Abstract
Glucose 6-phosphate dehydrogenase (G6PDH) is an enzyme that plays a critical role in the production of NADPH. Here we describe the identification of four transcripts (G6PDH-A, -B, -C, and -D) that putatively encode the enzyme in the southern cattle tick, Rhipicephalus (Boophilus) microplus. The genomic DNA that is spliced to produce G6PDH-A and -B is 8,600-9,000 bases in length and comprises 12 exons. Comparison of the R. microplus G6PDH gene structure with those available from insects and mammals revealed that the tick gene is most like that of humans. Detection of the four transcripts was evaluated by quantitative RT-PCR using template from larvae, unfed adult females and males, salivary gland tissues from 2- to 3-day-fed adult females and males, and salivary gland tissue of 4- to 5-day-fed adult females. The G6PDH-A and -C transcripts were present in all templates, and both displayed induced expression in salivary gland tissue of fed, adult females but not matched males. The G6PDH-D transcript was detected only in unfed adults and in larvae, a stage in which it was most abundant relative to the other three transcripts. The G6PDH-B transcript, while detectable in all templates, was of low copy number suggesting it is a rare transcript. Induced expression of G6PDH-A and G6PDH-C in fed females may play a role in the tolerance of oxidative stress that is induced upon feeding, and the transcript abundance in fed females may be a function of bloodmeal volume and the time adult females spend on the host relative to adult males.
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Affiliation(s)
- Pia Untalan Olafson
- USDA, Agricultural Research Service, Knipling-Bushland U. S. Livestock Insects Research Laboratory, 2700 Fredericksburg Rd., Kerrville, TX 78028, USA.
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Vatsyayan R, Chaudhary P, Lelsani PCR, Singhal P, Awasthi YC, Awasthi S, Singhal SS. Role of RLIP76 in doxorubicin resistance in lung cancer. Int J Oncol 2009; 34:1505-11. [PMID: 19424567 DOI: 10.3892/ijo_00000279] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Lung cancer is still a major cause of cancer deaths in spite of considerable efforts in its systemic therapy. Chemotherapy, along with local irradiation is frequently employed but as a palliative therapy. Inherent and acquired resistance in NSCLC and SCLC towards chemotherapeutic agents further makes chemotherapy an incommodious problem. The resistance mechanisms responsible for inherent DOX-resistance of NSCLC and acquired DOX-resistance in SCLC have been the subject of numerous investigations. This review will focus on the recent studies done for understanding the mechanism(s) of inherent and acquired resistance in NSCLC and SCLC and how these can be exploited for the future development of more effective novel biologic agents for the treatment of lung cancer.
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Affiliation(s)
- Rit Vatsyayan
- Department of Molecular Biology and Immunology, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
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Ciolino HP, Bass SE, MacDonald CJ, Cheng RYS, Yeh GC. Sulindac and its metabolites induce carcinogen metabolizing enzymes in human colon cancer cells. Int J Cancer 2008; 122:990-8. [PMID: 17985343 DOI: 10.1002/ijc.23218] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Sulindac is a nonsteroidal antiinflammatory drug that has been demonstrated to be a potent chemopreventive agent against colorectal cancer in both human and animal models. In vivo, sulindac may be reversibly reduced to the active antiinflammatory compound, sulindac sulfide, or irreversibly oxidized to sulindac sulfone. Sulindac has also been shown to inhibit polycyclic aromatic hydrocarbon (PAH)-induced cancer, but the molecular mechanisms of its antitumor effect remain unclear. In this study, we investigated the effects of sulindac and its metabolites on the expression of enzymes that metabolize and detoxify PAHs in 2 human colon cancer cell lines, LS180 and Caco-2. Sulindac and sulindac sulfide induced a sustained, concentration-dependent increase in CYP enzyme activity as well as an increase in the mRNA levels of CYP1A1, CYP1A2 and CYP1B1. Sulindac and sulindac sulfide induced the transcription of the CYP1A1 gene, as measured by the level of heterogeneous nuclear CYP1A1 RNA and verified by the use of actinomycin D as a transcription inhibitor. Chromatin immunoprecipitation assays demonstrated that sulindac and sulindac sulfide also increased the nuclear level of activated aryl hydrocarbon receptor, the transcription factor which mediates CYP expression. Additionally, sulindac and both metabolites increased the activity and mRNA expression of the carcinogen detoxification enzyme NAD(P)H:quinone oxidoreductase, as well as the expression of UDP-glucuronosyltransferase mRNA. These results show an overall upregulation of carcinogen metabolizing enzymes in colon cancer cells treated with sulindac, sulindac sulfide and sulindac sulfone that may contribute to the established chemoprotective effects of these compounds.
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Affiliation(s)
- Henry P Ciolino
- Division of Nutritional Sciences, Department of Human Ecology, University of Texas at Austin, Austin, TX, USA
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Bradshaw TD, Stone EL, Trapani V, Leong CO, Matthews CS, te Poele R, Stevens MFG. Mechanisms of acquired resistance to 2-(4-Amino-3-methylphenyl)benzothiazole in breast cancer cell lines. Breast Cancer Res Treat 2007; 110:57-68. [PMID: 17674193 DOI: 10.1007/s10549-007-9690-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2007] [Accepted: 07/13/2007] [Indexed: 11/29/2022]
Abstract
Compounds within the 2-(4-aminophenyl)benzothiazole class represent extremely potent and selective experimental antitumour agents. The lysylamide prodrug of 2-(4-amino-3-methylphenyl)-5-fluorobenzothiazole is undergoing phase I clinical evaluation. Extensive studies to elucidate mechanisms underlying the stark selectivity demonstrated potent cytosolic AhR ligand binding and cytochrome P450 1A1-catalysed bioactivation. Two human derived breast cell lines, initially exquisitely sensitive to this class of agent (GI50 < 5 nM) have been derived displaying acquired resistance to 2-(4-amino-3-methylphenyl)benzothiazole (DF 203; GI50 > 50 microM). Cross resistance to 2-(4-amino-3-iodophenyl)benzothiazole and 2-(4-amino-3-cyanophenyl)benzothiazole is observed (GI50 > 30 microM) as is > 100-fold reduced sensitivity of the two variant lines to 2-(4-amino-3-methylphenyl)-5-fluorobenzothiazole (5F 203). In contrast, cell lines possessing acquired resistance to DF 203 (203R) retain sensitivity to benzo[a]pyrene and doxorubicin. Examination of DF 203-treated cells by confocal microscopy and HPLC analyses of nutrient media concur revealing diminished depletion of DF 203 from medium and impaired intracellular DF 203 retention. In contrast to cytosolic arylhydrocarbon (AhR) receptors of wild type cells, AhR appears constitutively localised within nuclei of 203R cells; consequently, DF 203 fails to drive transcription of cyp1a1. DF 203- and 5F 203-derived DNA adducts fall significantly in 203R cells. Reduced number and intensity of gamma H2AX foci report protection against DF 203-evoked DNA double strand breaks. In conclusion, aberrant AhR signalling underlies at least in part acquired resistance to DF 203. Intriguingly, comparisons of gene transcription profiles between sensitive and resistant paired lines reveal > 5-fold up-regulation of cyp1b1 expression, a protein implicated in resistance to therapeutic agents.
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Affiliation(s)
- Tracey D Bradshaw
- Centre for Biomolecular Sciences, University of Nottingham, Nottingham, NG7 2RD, UK.
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Özyurt B, Güleç M, Özyurt H, Ekici F, Atış Ö, Akbaş A. THE EFFECT OF ANTIOXIDANT CAFFEIC ACID PHENETHYL ESTER (CAPE) ON SOME ENZYME ACTIVITIES IN CISPLATIN-INDUCED NEUROTOXICITY IN RATS. ELECTRONIC JOURNAL OF GENERAL MEDICINE 2006. [DOI: 10.29333/ejgm/82401] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Trapani V, Patel V, Leong CO, Ciolino HP, Yeh GC, Hose C, Trepel JB, Stevens MFG, Sausville EA, Loaiza-Pérez AI. DNA damage and cell cycle arrest induced by 2-(4-amino-3-methylphenyl)-5-fluorobenzothiazole (5F 203, NSC 703786) is attenuated in aryl hydrocarbon receptor deficient MCF-7 cells. Br J Cancer 2003; 88:599-605. [PMID: 12592376 PMCID: PMC2377159 DOI: 10.1038/sj.bjc.6600722] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The fluorinated benzothiazole analogue 2-(4-amino-3-methylphenyl)-5-fluorobenzothiazole (5F 203, NSC 703786) is a novel agent with potent and selective antitumour properties and, in the form of its L-lysylamide prodrug Phortress (NSC 710305), is a current candidate for early phase clinical studies. Previous findings have indicated that cytochrome P450 1A1 (CYP1A1) may play a role in the antitumour activity of molecules in the benzothiazole series including the nonfluorinated parent compound 2-(4-amino-3-methylphenyl)benzothiazole (DF 203, NSC 674495) (Kashiyama et al, 1999; Chua et al, 2000; Loaiza-Pérez et al, 2002). In this study, we assessed and verified that a fully functional aryl hydrocarbon receptor (AhR) signalling pathway is a necessary requisite for the induction of efficient cytotoxicity by 5F 203 in MCF-7 wild-type sensitive cells. Drug exposure caused MCF-7 sensitive cells to arrest in G(1) and S phase, and induced DNA adduct formation, in contrast to AhR-deficient AH(R100) variant MCF-7 cells. In sensitive MCF-7 cells, induction of CYP1A1 and CYP1B1 transcription (measured by luciferase reporter assay and real-time reverse transcriptase-polymerase chain reaction (RT-PCR)), and 7-ethoxyresorufin-O-deethylase (EROD) activity was demonstrated, following treatment with 5F 203. In contrast, in resistant AH(R100) cells, drug treatment did not affect CYP1A1 and CYP1B1 transcription and EROD activity. Furthermore, AH(R100) cells failed to produce either protein/DNA complexes on the xenobiotic responsive element (XRE) sequence of CYP1A1 promoter (measured by electrophoretic mobility shift assay) or DNA adducts. The data confirm that activation of the AhR signalling pathway is an important feature of the antitumour activity of 5F 203.
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Affiliation(s)
- V Trapani
- School of Pharmaceutical Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - V Patel
- Oral and Pharyngeal Cancer Branch, National Institutes of Dental and Craniofacial Research, Bethesda, MD, USA
| | - C-O Leong
- School of Pharmaceutical Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - H P Ciolino
- Cellular Defense and Carcinogenesis Section, Basic Research Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, National Institutes of Health, Frederick, MD 21702-1201, USA
| | - G C Yeh
- Cellular Defense and Carcinogenesis Section, Basic Research Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, National Institutes of Health, Frederick, MD 21702-1201, USA
| | - C Hose
- Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Frederick, MD 21702-1201, USA
| | - J B Trepel
- Medical Oncology Clinical Research Unit, Medicine Branch, National Cancer Institute, National Institutes of Health, MD 20892, USA
| | - M F G Stevens
- School of Pharmaceutical Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - E A Sausville
- Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 10, Room 6N115, Bethesda, MD 20892, USA
| | - A I Loaiza-Pérez
- Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 10, Room 6N115, Bethesda, MD 20892, USA
- Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 10, Room 6N115, Bethesda, MD 20892, USA. E-mail:
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