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Lin TL, Lu CC, Lai WF, Wu TS, Lu JJ, Chen YM, Tzeng CM, Liu HT, Wei H, Lai HC. Role of gut microbiota in identification of novel TCM-derived active metabolites. Protein Cell 2020; 12:394-410. [PMID: 32929698 PMCID: PMC8106560 DOI: 10.1007/s13238-020-00784-w] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 05/29/2020] [Indexed: 02/08/2023] Open
Abstract
Traditional Chinese Medicine (TCM) has been extensively used to ameliorate diseases in Asia for over thousands of years. However, owing to a lack of formal scientific validation, the absence of information regarding the mechanisms underlying TCMs restricts their application. After oral administration, TCM herbal ingredients frequently are not directly absorbed by the host, but rather enter the intestine to be transformed by gut microbiota. The gut microbiota is a microbial community living in animal intestines, and functions to maintain host homeostasis and health. Increasing evidences indicate that TCM herbs closely affect gut microbiota composition, which is associated with the conversion of herbal components into active metabolites. These may significantly affect the therapeutic activity of TCMs. Microbiota analyses, in conjunction with modern multiomics platforms, can together identify novel functional metabolites and form the basis of future TCM research.
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Affiliation(s)
- Tzu-Lung Lin
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Gueishan, Taoyuan, 33302, Taiwan, China
| | - Chia-Chen Lu
- Department of Respiratory Therapy, Fu Jen Catholic University, New Taipei City, 24205, Taiwan, China.,Department of Chest Medicine, Internal Medicine, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City, 24205, Taiwan, China
| | - Wei-Fan Lai
- Department of Medicine, Chang Gung University, Taoyuan, 33302, Taiwan, China
| | - Ting-Shu Wu
- Department of Medicine, Chang Gung University, Taoyuan, 33302, Taiwan, China.,Department of Laboratory Medicine and Internal Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, 33305, Taiwan, China.,Central Research Laboratory, Xiamen Chang Gung Hospital, Xiamen, 361026, China
| | - Jang-Jih Lu
- Department of Laboratory Medicine and Internal Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, 33305, Taiwan, China.,Central Research Laboratory, Xiamen Chang Gung Hospital, Xiamen, 361026, China
| | - Young-Mao Chen
- Bachelor Degree Program in Marine Biotechnology, College of Life Sciences, National Taiwan Ocean University, Keelung, 20224, Taiwan, China
| | - Chi-Meng Tzeng
- School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361005, China
| | - Hong-Tao Liu
- College of Basic Medicine, Hubei University of Chinese Medicine, Wuhan, 430065, China
| | - Hong Wei
- Central Laboratory, Clinical Medicine Scientific and Technical Innovation Park, Shanghai Tenth People's Hospital, Tongji University, Shanghai, 200435, China
| | - Hsin-Chih Lai
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Gueishan, Taoyuan, 33302, Taiwan, China. .,Department of Laboratory Medicine and Internal Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, 33305, Taiwan, China. .,Central Research Laboratory, Xiamen Chang Gung Hospital, Xiamen, 361026, China. .,Microbiota Research Center and Emerging Viral Infections Research Center, Chang Gung University, Taoyuan, 33302, Taiwan, China. .,Research Center for Chinese Herbal Medicine and Research Center for Food and Cosmetic Safety, College of Human Ecology, Chang Gung University of Science and Technology, Gueishan, Taoyuan, 33303, Taiwan, China.
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2
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Creekmore BC, Gray JH, Walton WG, Biernat KA, Little MS, Xu Y, Liu J, Gharaibeh RZ, Redinbo MR. Mouse Gut Microbiome-Encoded β-Glucuronidases Identified Using Metagenome Analysis Guided by Protein Structure. mSystems 2019; 4:e00452-19. [PMID: 31455640 PMCID: PMC6712278 DOI: 10.1128/msystems.00452-19] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 08/09/2019] [Indexed: 11/25/2022] Open
Abstract
Gut microbial β-glucuronidase (GUS) enzymes play important roles in drug efficacy and toxicity, intestinal carcinogenesis, and mammalian-microbial symbiosis. Recently, the first catalog of human gut GUS proteins was provided for the Human Microbiome Project stool sample database and revealed 279 unique GUS enzymes organized into six categories based on active-site structural features. Because mice represent a model biomedical research organism, here we provide an analogous catalog of mouse intestinal microbial GUS proteins-a mouse gut GUSome. Using metagenome analysis guided by protein structure, we examined 2.5 million unique proteins from a comprehensive mouse gut metagenome created from several mouse strains, providers, housing conditions, and diets. We identified 444 unique GUS proteins and organized them into six categories based on active-site features, similarly to the human GUSome analysis. GUS enzymes were encoded by the major gut microbial phyla, including Firmicutes (60%) and Bacteroidetes (21%), and there were nearly 20% for which taxonomy could not be assigned. No differences in gut microbial gus gene composition were observed for mice based on sex. However, mice exhibited gus differences based on active-site features associated with provider, location, strain, and diet. Furthermore, diet yielded the largest differences in gus composition. Biochemical analysis of two low-fat-associated GUS enzymes revealed that they are variable with respect to their efficacy of processing both sulfated and nonsulfated heparan nonasaccharides containing terminal glucuronides.IMPORTANCE Mice are commonly employed as model organisms of mammalian disease; as such, our understanding of the compositions of their gut microbiomes is critical to appreciating how the mouse and human gastrointestinal tracts mirror one another. GUS enzymes, with importance in normal physiology and disease, are an attractive set of proteins to use for such analyses. Here we show that while the specific GUS enzymes differ at the sequence level, a core GUSome functionality appears conserved between mouse and human gastrointestinal bacteria. Mouse strain, provider, housing location, and diet exhibit distinct GUSomes and gus gene compositions, but sex seems not to affect the GUSome. These data provide a basis for understanding the gut microbial GUS enzymes present in commonly used laboratory mice. Further, they demonstrate the utility of metagenome analysis guided by protein structure to provide specific sets of functionally related proteins from whole-genome metagenome sequencing data.
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Affiliation(s)
- Benjamin C Creekmore
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Josh H Gray
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - William G Walton
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Kristen A Biernat
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Michael S Little
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Yongmei Xu
- Chemical Biology and Medicinal Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Jian Liu
- Chemical Biology and Medicinal Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Raad Z Gharaibeh
- Department of Medicine, University of Florida, Gainesville, Florida, USA
| | - Matthew R Redinbo
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Department of Biochemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Department of Microbiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Integrated Program in Biological and Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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3
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Tang L, Li X, Wan L, Xiao Y, Zeng X, Ding H. Herbal Medicines for Irinotecan-Induced Diarrhea. Front Pharmacol 2019; 10:182. [PMID: 30983992 PMCID: PMC6450188 DOI: 10.3389/fphar.2019.00182] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 02/13/2019] [Indexed: 12/12/2022] Open
Abstract
Irinotecan (CPT-11), a water-soluble derivative of camptothecin, belongs to the class of DNA topoisomerase I inhibitors and has been approved worldwide for the treatment of advanced colorectal cancer, lung cancer, and malignant lymphoma. Although CPT-11-based chemotherapy is widely used, severe gastrointestinal (GI) toxicity, especially late-onset diarrhea, is a common adverse reaction, limiting clinical application of the drug. The incidence of grade 3 or 4 diarrhea is high, with 20-40% of CPT-11-treated patients experiencing this adverse effect. High-dose loperamide and octreotide are generally recommended for treatment of CPT-11-induced diarrhea. However, in clinical practice, loperamide is associated with a significant failure rate and the beneficial effects of octreotide are controversial. An accumulating number of recent studies have suggested that medicinal herbs and their derived phytocompounds may be effective complementary treatments for CPT-11-induced diarrhea. In this mini-review, we briefly summarize currently available literatures regarding the formulae and herbs/natural products used as adjuvants in animal and clinical studies for the treatment of diarrhea caused by CPT-11.
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Affiliation(s)
- Liu Tang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - Xiaolei Li
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - Liping Wan
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - Yao Xiao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - Xin Zeng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - Hong Ding
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
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4
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Prevention of the Chemotherapy-Induced Oral Mucositis in Esophageal Cancer by Use of Hangeshashinto (TJ-14). Int Surg 2018. [DOI: 10.9738/intsurg-d-17-00114.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective:
Oral mucositis and diarrhea are adverse effects (AEs) of chemotherapy and chemoradiotherapy (CR/CRT) that commonly occur in patients of esophageal cancer (EC). We investigated whether Hangeshashinto (TJ-14)—a Japanese traditional medicine—could control oral mucositis, pain, incidence of esophagitis, and diarrhea in patients who underwent CT/CRT for EC.
Methods:
We enrolled 39 patients (36 men, 3 women) who underwent docetaxel- or cisplatin-based CT/CRT for EC between July 2012 and June 2014, of whom 19 used TJ-14 dissolved in water as an oral rinse 3 times a day over the first 2 courses of their treatment, and 20 (the control group) received no particular prophylaxis against mucositis. Their AEs, including mucositis, were evaluated according to the Common Terminology Criteria for Adverse Events (CTCAE) version 4.0.
Results:
Although incidences of oral mucositis, appetite loss, nausea, constipation, and vomiting did not significantly differ between the TJ-14 group and controls, diarrhea incidence was significantly lower in the TJ-14 group by the second treatment course (P = 0.0261 by per protocol set analyses).
Conclusions:
TJ-14 significantly decreases diarrhea caused by CT/CRT in patients treated for EC, although TJ-14 cannot prevent of causing oral mucositis.
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Swami U, Goel S, Mani S. Therapeutic targeting of CPT-11 induced diarrhea: a case for prophylaxis. Curr Drug Targets 2013; 14:777-97. [PMID: 23597015 DOI: 10.2174/1389450111314070007] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 03/23/2013] [Accepted: 04/04/2013] [Indexed: 12/14/2022]
Abstract
CPT-11 (irinotecan), a DNA topoisomerase I inhibitor is one of the main treatments for colorectal cancer. The main dose limiting toxicities are neutropenia and late onset diarrhea. Though neutropenia is manageable, CPT-11 induced diarrhea is frequently severe, resulting in hospitalizations, dose reductions or omissions leading to ineffective treatment administration. Many potential agents have been tested in preclinical and clinical studies to prevent or ameliorate CPT-11 induced late onset diarrhea. It is predicted that prophylaxis of CPT-11 induced diarrhea will reduce sub-therapeutic dosing as well as hospitalizations and will eventually lead to dose escalations resulting in better response rates. This article reviews various experimental agents and strategies employed to prevent this debilitating toxicity. Covered topics include schedule/dose modification, intestinal alkalization, structural/chemical modification, genetic testing, anti-diarrheal therapies, transporter (ABCB1, ABCC2, BCRP2) inhibitors, enzyme (β-glucuronidase, UGT1A1, CYP3A4, carboxylesterase, COX-2) inducers and inhibitors, probiotics, antibiotics, adsorbing agents, cytokine and growth factor activators and inhibitors and other miscellaneous agents.
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Affiliation(s)
- Umang Swami
- Internal Medicine, St. Barnabas Hospital, Bronx, NY 10457, USA
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Nakagawa N, Katoh M, Yoshioka Y, Nakajima M, Yokoi T. Inhibitory effects of Kampo medicine on human UGT2B7 activity. Drug Metab Pharmacokinet 2010; 24:490-9. [PMID: 20045984 DOI: 10.2133/dmpk.24.490] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Kampo medicine is traditional Japanese medicine modified from the Chinese original. Kampo medicine is a mixture of several medicinal herbs and includes many ingredients such as glycosides. Glycosides are hydrolyzed to aglycons by intestinal bacterial flora and absorbed into the body. Aglycons such as baicalein and glycyrrhetinic acid can be conjugated by UDP-glucuronosyltransferase (UGT) in human liver or small intestine. UGT2B7 is one of the major isoforms responsible for drug conjugation including morphine 3- and 3'- azido-3'-deoxythymidine (AZT) glucuronidation. The present study investigates the effects of 51 Kampo medicines, 14 medicinal herbs and 11 ingredients on UGT2B7 activity in human liver microsomes. Morphine 3-glucuronidation was inhibited by more than 50% by 9 of 51 Kampo medicines such as Ryo-kei-jutsu-kan-to. AZT glucuronidation was inhibited by more than 50% by 24 of 51 Kampo medicines such as Jumi-haidoku-to. Medicinal herbs such as Daio (Rhei Rhizoma), Kanzo (Glycyrrhizae Radix) and Keihi (Cinnamomi Cortex) exhibited more than 80% inhibition on both glucuronidations. The major ingredients of these medicinal herbs inhibited UGT2B7 activity with low K(i). Kampo medicines were found to inhibit the UGT2B7 activity and may cause drug interactions via the inhibition of UGT.
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Affiliation(s)
- Nao Nakagawa
- Drug Metabolism and Toxicology, Division of Pharmaceutical Sciences, Graduate School of Medical Science, Kanazawa University, Kanazawa 920-1192, Japan
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7
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Lu Y, Zhu J, Chen X, Li N, Fu F, He J, Wang G, Zhang L, Zheng Y, Qiu Z, Yu X, Han D, Wu L. Identification of Human UDP-Glucuronosyltransferase Isoforms Responsible for the Glucuronidation of Glycyrrhetinic Acid. Drug Metab Pharmacokinet 2009; 24:523-8. [DOI: 10.2133/dmpk.24.523] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Katoh M, Yoshioka Y, Nakagawa N, Yokoi T. Effects of Japanese Herbal Medicine, Kampo, on Human UGT1A1 Activity. Drug Metab Pharmacokinet 2009; 24:226-34. [DOI: 10.2133/dmpk.24.226] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Saracino MR, Lampe JW. Phytochemical regulation of UDP-glucuronosyltransferases: implications for cancer prevention. Nutr Cancer 2008; 59:121-41. [PMID: 18001207 DOI: 10.1080/01635580701458178] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Uridine 5'-diphospho-glucuronosyltransferases (UGTs) are Phase II biotransformation enzymes that metabolize endogenous and exogenous compounds, some of which have been associated with cancer risk. Many phytochemicals have been shown to induce UGTs in humans, rodents, and cell culture systems. Because UGTs maintain hormone balance and facilitate excretion of potentially carcinogenic compounds, regulation of their expression and activity may affect cancer risk. Phytochemicals regulate transcription factors such as the nuclear factor-erythroid 2-related factor 2 (Nrf2), aryl hydrocarbon, and pregnane X receptors as well as proteins in several signal transduction cascades that converge on Nrf2 to stimulate UGT expression. This induction can be modified by several factors, including phytochemical dose and bioavailability and interindividual variation in enzyme expression. In this review, we summarize the knowledge of dietary modulation of UGTs, particularly by phytochemicals, and discuss the potential mechanisms by which phytochemicals regulate UGT transcription.
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10
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Principles of Complementary and Alternative Medicine for Cancer. Oncology 2007. [DOI: 10.1007/0-387-31056-8_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Fujiwara Y, Sekine I, Ohe Y, Kunitoh H, Yamamoto N, Nokihara H, Simmyo Y, Fukui T, Yamada K, Tamura T. Serum Total Bilirubin as a Predictive Factor for Severe Neutropenia in Lung Cancer Patients Treated with Cisplatin and Irinotecan. Jpn J Clin Oncol 2007; 37:358-64. [PMID: 17538190 DOI: 10.1093/jjco/hym033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE To clarify the association between pre-treatment total bilirubin (PTB) level and severe toxicity in patients receiving cisplatin and irinotecan. METHODS We analyzed retrospectively the relationships of grade 4 neutropenia or grade 3-4 diarrhea and clinical variables including PTB and pre-treatment neutrophil counts (PNC) using a logistic regression model. RESULTS One hundred and twenty-seven patients (93 men, 34 women; median age: 61 years; range: 24-74 years) received cisplatin (60 or 80 mg/m2) on day 1 and irinotecan (60 mg/m2) on days 1 and 8 every 3 weeks or on days 1, 8 and 15 every 4 weeks. Grade 4 neutropenia occurred in 29 patients (23%) and grade 3-4 diarrhea occurred in 13 patients (10%). Grade 4 neutropenia was associated with a higher PTB level (odds ratio: 4.9; 95% confidence interval: 1.4-17.7), a higher cisplatin dose (2.8, 1.0-7.8) and a lower PNC (1.5, 1.0-2.3). Grade 3-4 diarrhea was associated with liver metastasis (11.2, 2.2-57.4), a higher cisplatin dose (5.0, 1.2-21.3) and a lower PNC (2.0, 1.1-3.6). CONCLUSIONS PTB level was associated with the severity of neutropenia caused by cisplatin and irinotecan.
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Affiliation(s)
- Yutaka Fujiwara
- Division of Internal Medicine and Thoracic Oncology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo, Japan
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Yang XX, Hu ZP, Xu AL, Duan W, Zhu YZ, Huang M, Sheu FS, Zhang Q, Bian JS, Chan E, Li X, Wang JC, Zhou SF. A Mechanistic Study on Reduced Toxicity of Irinotecan by Coadministered Thalidomide, a Tumor Necrosis Factor-α Inhibitor. J Pharmacol Exp Ther 2006; 319:82-104. [PMID: 16815871 DOI: 10.1124/jpet.106.103606] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Dose-limiting diarrhea and myelosuppression compromise the success of irinotecan (7-ethyl-10-[4-[1-piperidino]-1-piperidino]carbonyloxycamptothecin) (CPT-11)-based chemotherapy. A recent pilot study indicates that thalidomide attenuates the toxicity of CPT-11 in cancer patients. This study aimed to investigate whether coadministered thalidomide modulated the toxicities of CPT-11 and the underlying mechanisms using several in vivo and in vitro models. Diarrhea, intestinal lesions, cytokine expression, and intestinal epithelial apoptosis were monitored. Coadministered thalidomide (100 mg/kg i.p. for 8 days) significantly attenuated body weight loss, myelosuppression, diarrhea, and intestinal histological lesions caused by CPT-11 (60 mg/kg i.v. for 4 days). This was accompanied by inhibition of tumor necrosis factor-alpha, interleukins 1 and 6 and interferon-gamma, and intestinal epithelial apoptosis. Coadministered thalidomide also significantly increased the systemic exposure of CPT-11 but decreased that of SN-38 (7-ethyl-10-hydroxycampothecin). It significantly reduced the biliary excretion and cecal exposure of CPT-11, SN-38, and SN-38 glucuronide. Thalidomide hydrolytic products inhibited hydrolysis of CPT-11 in rat liver microsomes but not in primary rat hepatocytes. In addition, thalidomide and its major hydrolytic products, such as phthaloyl glutamic acid (PGA), increased the intracellular accumulation of CPT-11 and SN-38 in primary rat hepatocytes. They also significantly decreased the transport of CPT-11 and SN-38 in Caco-2 and parental MDCKII cells. Thalidomide and PGA also significantly inhibited P-glycoprotein (PgP/MDR1), multidrug resistance-associated protein (MRP1)- and MRP2-mediated CPT-11 and SN-38 transport in MDCKII cells. These results provide insights into the pharmacodynamic and pharmacokinetic mechanisms for the protective effects of thalidomide against CPT-11-induced intestinal toxicity.
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Affiliation(s)
- Xiao-Xia Yang
- Department of Pharmacy, Faculty of Science, National University of Singapore, Science Drive 4, Singapore 117543
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Chen S, Ruan Q, Bedner E, Deptala A, Wang X, Hsieh TC, Traganos F, Darzynkiewicz Z. Effects of the flavonoid baicalin and its metabolite baicalein on androgen receptor expression, cell cycle progression and apoptosis of prostate cancer cell lines. Cell Prolif 2001; 34:293-304. [PMID: 11591177 PMCID: PMC6496311 DOI: 10.1046/j.0960-7722.2001.00213.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2000] [Accepted: 01/30/2001] [Indexed: 11/20/2022] Open
Abstract
Recent studies on the Chinese herbal medicine PC SPES showed biological activities against prostate cancer in vitro, in vivo and in patients with advanced stages of the disease. In investigating its mode of action, we have isolated a few of the active compounds. Among them, baicalin was the most abundant (about 6%) in the ethanol extract of PC SPES, as determined by HPLC. Baicalin is known to be converted in vivo to baicalein by the cleavage of the glycoside moiety. Therefore, it is useful to compare their activities in vitro. The effects of baicalin and baicalein were studied in androgen-positive and -negative human prostate cancer lines LNCaP and JCA-1, respectively. Inhibition of cell growth by 50% (ED(50)) in LNCaP cells was seen at concentrations of 60.8 +/- 3.2 and 29.8 +/- 2.2 microM baicalin and baicalein, respectively. More potent growth inhibitory effects were observed in androgen-negative JCA-1 cells, for which the ED(50) values for baicalin and baicalein were 46.8 +/- 0.7 and 17.7 +/- 3.4, respectively. Thus, it appears that cell growth inhibition by these flavonoids is independent of androgen receptor status. Both agents (1) caused an apparent accumulation of cells in G(1) at the ED(50) concentration, (2) induced apoptosis at higher concentrations, and (3) decreased expression of the androgen receptor in LNCaP cells.
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Affiliation(s)
- S Chen
- Brander Cancer Research Institute, New York Medical College, Hawthorne, NY 10532, USA.
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Miya T, Fujikawa R, Fukushima J, Nogami H, Koshiishi Y, Goya T. Bradycardia induced by irinotecan: a case report. Jpn J Clin Oncol 1998; 28:709-11. [PMID: 9861240 DOI: 10.1093/jjco/28.11.709] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Irinotecan chloride (CPT-11) is a new semi-synthetic camptothecin analogue which has encouraging antitumor activity against various malignancies. The major and unique toxicity of CPT-11 is diarrhea. Cardiovascular toxicity is rare and has not been found in clinical trials performed in Japan except for a very few cases of insignificant tachycardiac arrhythmia. We report a case of a 69-year-old man with recurrent colon cancer who suffered from bradycardia induced by infusion of CPT-11. Other toxicities including hematological toxicity and diarrhea were mild. Pharmacokinetic analysis using a limited sampling model revealed that the occurrence of bradycardia did not correlate with the excess of drug exposure. Although all of the cholinergic actions reported in the literature were mild, cardiotoxicity may come to be a clinically significant problem. If the events were examined more thoroughly, the cholinergic effect may be discovered more frequently. To administer CPT-11 safely needs meticulous monitoring not only for hematological toxicity and diarrhea but also for other cholinergic actions including bradycardia.
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Affiliation(s)
- T Miya
- Department of Surgery II, Kyorin University School of Medicine, Mitaka, Tokyo, Japan.
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15
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Takahashi T, Fujiwara Y, Yamakido M, Katoh O, Watanabe H, Mackenzie PI. The role of glucuronidation in 7-ethyl-10-hydroxycamptothecin resistance in vitro. Jpn J Cancer Res 1997; 88:1211-7. [PMID: 9473740 PMCID: PMC5921346 DOI: 10.1111/j.1349-7006.1997.tb00351.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Although glucuronidation catalyzed by uridine 5'-diphosphoglucuronosyltransferase (UGT) is a major pathway of drug inactivation in humans, glucuronidation in malignant cells has received little attention as a cause of anti-cancer drug resistance. In this study, we tried to elucidate the role of SN-38 glucuronidation in the CPT-11-resistant human lung cancer cell line PC-7/CPT. PC-7/CPT cells possessed an increased activity to glucuronidate SN-38 compared to the parent cells, PC-7. Furthermore, sensitivity of PC-7/CPT cells to SN-38 was improved by inhibiting UGT activity. Western and northern blot analyses demonstrated that this increased activity was due to increased levels of UGT protein and mRNA. These results not only imply that upregulation of UGT activity in PC-7/CPT cells may contribute in part to SN-38 resistance, but also illustrate the important of drug metabolism within malignant cells themselves, as a cause of drug resistance.
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Affiliation(s)
- T Takahashi
- Second Department of Internal Medicine, Hiroshima University School of Medicine
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