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Wuerger LTD, Kudiabor F, Alarcan J, Templin M, Poetz O, Sieg H, Braeuning A. Okadaic Acid Activates JAK/STAT Signaling to Affect Xenobiotic Metabolism in HepaRG Cells. Cells 2023; 12:770. [PMID: 36899906 PMCID: PMC10000888 DOI: 10.3390/cells12050770] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/06/2023] Open
Abstract
Okadaic acid (OA) is a marine biotoxin that is produced by algae and accumulates in filter-feeding shellfish, through which it enters the human food chain, leading to diarrheic shellfish poisoning (DSP) after ingestion. Furthermore, additional effects of OA have been observed, such as cytotoxicity. Additionally, a strong downregulation of the expression of xenobiotic-metabolizing enzymes in the liver can be observed. The underlying mechanisms of this, however, remain to be examined. In this study, we investigated a possible underlying mechanism of the downregulation of cytochrome P450 (CYP) enzymes and the nuclear receptors pregnane X receptor (PXR) and retinoid-X-receptor alpha (RXRα) by OA through NF-κB and subsequent JAK/STAT activation in human HepaRG hepatocarcinoma cells. Our data suggest an activation of NF-κB signaling and subsequent expression and release of interleukins, which then activate JAK-dependent signaling and thus STAT3. Moreover, using the NF-κB inhibitors JSH-23 and Methysticin and the JAK inhibitors Decernotinib and Tofacitinib, we were also able to demonstrate a connection between OA-induced NF-κB and JAK signaling and the downregulation of CYP enzymes. Overall, we provide clear evidence that the effect of OA on the expression of CYP enzymes in HepaRG cells is regulated through NF-κB and subsequent JAK signaling.
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Affiliation(s)
- Leonie T. D. Wuerger
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Felicia Kudiabor
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Jimmy Alarcan
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Markus Templin
- NMI Natural and Medical Sciences Institute, Markwiesenstraße 55, 72770 Reutlingen, Germany
| | - Oliver Poetz
- NMI Natural and Medical Sciences Institute, Markwiesenstraße 55, 72770 Reutlingen, Germany
- SIGNATOPE GmbH, Markwiesenstraße 55, 72770 Reutlingen, Germany
| | - Holger Sieg
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Albert Braeuning
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
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Dietary Phytochemicals as Potential Chemopreventive Agents against Tobacco-Induced Lung Carcinogenesis. Nutrients 2023; 15:nu15030491. [PMID: 36771198 PMCID: PMC9920588 DOI: 10.3390/nu15030491] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/23/2022] [Accepted: 01/14/2023] [Indexed: 01/19/2023] Open
Abstract
Lung cancer is the second most common cancer in the world. Cigarette smoking is strongly connected with lung cancer. Benzo[a]pyrene (BaP) and 4-(N-methyl-N-nitrosamine)-1-(3-pyridyl)-butanone (NNK) are the main carcinogens in cigarette smoking. Evidence has supported the correlation between these two carcinogens and lung cancer. Epidemiology analysis suggests that lung cancer can be effectively prevented through daily diet adjustments. This review aims to summarize the studies published in the past 20 years exploring dietary phytochemicals using Google Scholar, PubMed, and Web of Science databases. Dietary phytochemicals mainly include medicinal plants, beverages, fruits, vegetables, spices, etc. Moreover, the perspectives on the challenges and future directions of dietary phytochemicals for lung cancer chemoprevention will be provided. Taken together, treatment based on the consumption of dietary phytochemicals for lung cancer chemoprevention will produce more positive outcomes in the future and offer the possibility of reducing cancer risk in society.
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Mamallapalli J, Kanumuri SRR, Corral P, Johnston E, Zhuang C, McCurdy CR, Mathews CA, Sharma A, Xing C. Characterization of Different Forms of Kava (Piper methysticum) Products by UPLC-MS/MS. PLANTA MEDICA 2022; 88:1348-1359. [PMID: 34839465 DOI: 10.1055/a-1708-1994] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
There are several forms of kava (Piper methysticum) products available for human consumption, and many factors are known to influence their chemical compositions and therefore their pharmacological properties. Because of the increased popularity of kava intake, a rigorous characterization of their content diversity is prerequisite, particularly due to its known potential to cause hepatotoxicity. To understand the composition diversity of kavalactones and flavokavains in commercial kava products, we developed a UPLC-MS/MS-based analytical method for the quantification of six kavalactones (kavain, dihydrokavain, methysticin, dihydromethysticin, yangonin and desmethoxyyangonin) and two flavokavains (flavokavains A and B) and analyzed their contents in 28 different kava products in the form of capsules, tinctures, traditional aqueous suspensions and dried powders. Our results demonstrated a great variation in terms of the total and relative abundance of the analyzed kavalactones and flavokavains among the analyzed kava preparations. More importantly, the kavalactone abundance in the product label could differ up to 90% from our experimental measurements. Therefore, more rigorous and comprehensive quality control of kava products is required with respect to the content of individual kavalactones and flavokavains. Accurate content information is essential to understand the pharmacological properties and safety of different kava products.
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Affiliation(s)
- Jessica Mamallapalli
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Siva Rama Raju Kanumuri
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL, USA
- Translational Drug Development Core, Clinical and Translational Science Institute, University of Florida, Gainesville, FL, USA
| | - Pedro Corral
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | | | - Chunlin Zhuang
- School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Christopher R McCurdy
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL, USA
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL, USA
- Translational Drug Development Core, Clinical and Translational Science Institute, University of Florida, Gainesville, FL, USA
| | - Carol A Mathews
- Department of Psychiatry, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Abhisheak Sharma
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL, USA
- Translational Drug Development Core, Clinical and Translational Science Institute, University of Florida, Gainesville, FL, USA
| | - Chengguo Xing
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL, USA
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Vale Junior EPDO, Ferreira MVR, Fernandes BCS, Silva TTDA, Martins FA, Almeida PMDE. Protective effect of kavain in meristematic cells of Allium cepa L. AN ACAD BRAS CIENC 2022; 94:e20200520. [PMID: 35703688 DOI: 10.1590/0001-3765202220200520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 06/21/2020] [Indexed: 10/26/2023] Open
Abstract
Kavain is one of the main kavalactones of Piper methysticum (Piperaceae) with anxiolytic, analgesic, and antioxidant activities. Therefore, the aim of the study was to evaluate the cytotoxic, mutagenic, and antimutagenic potential of kavain in Allium cepa cells. Roots of A. cepa were transferred to the negative (2% acetone) and positive (10 µg/mL of Methylmethanesulfonate, MMS) controls and to the concentrations of kavain (32, 64 and 128 µg/mL) for 48 h. A total of 5,000 meristematic cells were analyzed under an optical microscope to determine the mitotic index, mean number of chromosomal alterations and percentage of damage reduction. Data were analyzed by Kruskal-Wallis test (p <0.05). All concentrations of kavain were not cytotoxic and did not show significant chromosomal changes when compared to 2% acetone. Kavain showed a cytoprotective effect in the pre (128 μg/mL) and in the post-treatment (32 and 64 μg/mL) and reduced damage against the mutagenic action of MMS in all concentrations of the pre and simultaneous and at the highest of post (128 μg/mL). Kavain promoted a significant reduction in micronuclei, nuclear buds and chromosomal losses in relation to MMS. The observed data indicate the importance of kavain for the inhibition of damage and chemoprevention.
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Affiliation(s)
- Erasmo P DO Vale Junior
- Universidade Estadual do Piauí, Centro de Ciências da Natureza (CCN), Laboratório de Genética, Rua João Cabral, 2231, 64002-150 Teresina PI, Brazil
| | - Marcos Vitor R Ferreira
- Universidade Estadual do Piauí, Centro de Ciências da Natureza (CCN), Laboratório de Genética, Rua João Cabral, 2231, 64002-150 Teresina PI, Brazil
| | - Bianca Cristina S Fernandes
- Universidade Estadual do Piauí, Centro de Ciências da Natureza (CCN), Laboratório de Genética, Rua João Cabral, 2231, 64002-150 Teresina PI, Brazil
| | - Thais T DA Silva
- Universidade Estadual do Piauí, Centro de Ciências da Natureza (CCN), Laboratório de Genética, Rua João Cabral, 2231, 64002-150 Teresina PI, Brazil
| | - Francielle Alline Martins
- Universidade Estadual do Piauí, Centro de Ciências da Natureza (CCN), Laboratório de Genética, Rua João Cabral, 2231, 64002-150 Teresina PI, Brazil
| | - Pedro Marcos DE Almeida
- Universidade Estadual do Piauí (UESPI/FACIME), Centro de Ciências da Saúde (CCS), Departamento de Genética, Laboratório de Genética. Rua Olavo Bilac, 2335, 64049-570 Teresina PI, Brazil
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Tuerxuntayi A, Tusun A, Tajiguli A. Rapid detection and structural characterization of methysticin metabolites generated from rat and human liver microsomes and hepatocytes using ultra-high-performance liquid chromatography coupled with high-resolution mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2021; 35:e9208. [PMID: 34606659 DOI: 10.1002/rcm.9208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 09/26/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
RATIONALE Methysticin is a naturally occurring ingredient isolated from Piper methysticum Forst. The metabolic profile of methysticin is unknown. The goal of this study was to elucidate the metabolism of methysticin using rat and human liver microsomes and hepatocytes. METHODS The incubation samples were analyzed using ultra-high-performance liquid chromatography coupled with quadrupole/orbitrap high-resolution mass spectrometry (UHPLC-HRMS). The structures of the metabolites were characterized based on the elemental composition, exact mass, and product ions. RESULTS A total of 10 metabolites were detected and identified. Among these metabolites, M4 (ring opening of 1,3-benzodioxole) was the predominant metabolite in rat and human liver microsomes. M4 and its glucuronide conjugate (M2) were the major metabolites in rat and human hepatocytes. The metabolic pathways of methysticin are summarized as follows: (a) oxidative ring opening of 1,3-benzodioxole forms the catechol derivative (M4), which subsequently undergoes glucuronidation (M1 and M2), methylation (M8), and sulfation (M7). (b) Demethylation to yield desmethyl methysticin (M6), followed by glucuronidation (M3 and M5). (c) Hydroxylation (M9 and M10). CONCLUSIONS For the first time, this study provides new information on the in vitro metabolic profiles of methysticin, which facilitates an understanding of the disposition of this bioactive ingredient.
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Affiliation(s)
- Adila Tuerxuntayi
- Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Key Laboratory of Plant Stress Biology in Arid Land, College of Life Science, Xinjiang Normal University, Urumqi, China
| | - Abudourusuli Tusun
- Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Key Laboratory of Plant Stress Biology in Arid Land, College of Life Science, Xinjiang Normal University, Urumqi, China
| | - Abulikemu Tajiguli
- Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Key Laboratory of Plant Stress Biology in Arid Land, College of Life Science, Xinjiang Normal University, Urumqi, China
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Teixeira da Silva T, Braga Martins J, Do Socorro de Brito Lopes M, de Almeida PM, Silva Sá JL, Alline Martins F. Modulating effect of DL-kavain on the mutagenicity and carcinogenicity induced by doxorubicin in Drosophila melanogaster. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2021; 84:769-782. [PMID: 34176449 DOI: 10.1080/15287394.2021.1942354] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Kavain, kavalactone, present in Piper methysticum exhibits anticonvulsive, analgesic, anxiolytic, antiepileptic, antithrombotic, anti-inflammatory and antioxidant properties. Given its importance, the aim of the present study was to assess (1) the mutagenic and carcinogenicity of kavain administered alone and (2) the antimutagenic and anticarcinogenic potential when administered simultaneously with the chemotherapeutic drug doxorubicin (DXR) using the Somatic Mutation and Recombination Test (SMART) and Epithelial Tumor Test (ETT) using Drosophila melanogaster as a model system. Third-stage larvae from a standard (ST) and high metabolic bioactivation (HB) crosses were treated with different kavain concentrations (32, 64 or 128 μg/ml), alone or in conjunction with DXR (0.125 mg/ml). In ST descendants, kavain produced no significant mutagenic or recombinogenic effects. In the HB cross, mutagenic activity was observed at kavain concentrations of 64 and 128 μg/ml. In the DXR and kavain co-treatment, a modulating effect of the DXR-mediated mutagenic response dependent upon the concentration was detected in both crosses. In ETT, no marked carcinogenic or anticarcinogenic activity was noted for kavain. However, when kavain was combined with DXR synergistic induction of tumors by the chemotherapeutic drug occurred indicating that kavain enhanced the carcinogenic action of DXR.
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Affiliation(s)
- Thaís Teixeira da Silva
- Department of Chemistry, State Post-Graduation Program in Chemistry, University of Piauí, Teresina, Piauí, Brazil
- Laboratory of Genetics, Center for Natural Sciences, State University of Piauí, Teresina, Piauí, Brazil
| | - Júlia Braga Martins
- Laboratory of Genetics, Center for Natural Sciences, State University of Piauí, Teresina, Piauí, Brazil
| | | | - Pedro Marcos de Almeida
- Laboratory of Genetics, Center for Natural Sciences, State University of Piauí, Teresina, Piauí, Brazil
- Department of Genetics, Health Sciences Center, State University of Piauí, Teresina, Piauí, Brazil
| | - José Luiz Silva Sá
- Department of Chemistry, State Post-Graduation Program in Chemistry, University of Piauí, Teresina, Piauí, Brazil
| | - Francielle Alline Martins
- Department of Chemistry, State Post-Graduation Program in Chemistry, University of Piauí, Teresina, Piauí, Brazil
- Laboratory of Genetics, Center for Natural Sciences, State University of Piauí, Teresina, Piauí, Brazil
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Bian T, Corral P, Wang Y, Botello J, Kingston R, Daniels T, Salloum RG, Johnston E, Huo Z, Lu J, Liu AC, Xing C. Kava as a Clinical Nutrient: Promises and Challenges. Nutrients 2020; 12:E3044. [PMID: 33027883 PMCID: PMC7600512 DOI: 10.3390/nu12103044] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/21/2020] [Accepted: 09/25/2020] [Indexed: 12/20/2022] Open
Abstract
Kava beverages are typically prepared from the root of Piper methysticum. They have been consumed among Pacific Islanders for centuries. Kava extract preparations were once used as herbal drugs to treat anxiety in Europe. Kava is also marketed as a dietary supplement in the U.S. and is gaining popularity as a recreational drink in Western countries. Recent studies suggest that kava and its key phytochemicals have anti-inflammatory and anticancer effects, in addition to the well-documented neurological benefits. While its beneficial effects are widely recognized, rare hepatotoxicity had been associated with use of certain kava preparations, but there are no validations nor consistent mechanisms. Major challenges lie in the diversity of kava products and the lack of standardization, which has produced an unmet need for quality initiatives. This review aims to provide the scientific community and consumers, as well as regulatory agencies, with a broad overview on kava use and its related research. We first provide a historical background for its different uses and then discuss the current state of the research, including its chemical composition, possible mechanisms of action, and its therapeutic potential in treating inflammatory and neurological conditions, as well as cancer. We then discuss the challenges associated with kava use and research, focusing on the need for the detailed characterization of kava components and associated risks such as its reported hepatotoxicity. Lastly, given its growing popularity in clinical and recreational use, we emphasize the urgent need for quality control and quality assurance of kava products, pharmacokinetics, absorption, distribution, metabolism, excretion, and foundational pharmacology. These are essential in order to inform research into the molecular targets, cellular mechanisms, and creative use of early stage human clinical trials for designer kava modalities to inform and guide the design and execution of future randomized placebo controlled trials to maximize kava's clinical efficacy and to minimize its risks.
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Affiliation(s)
- Tengfei Bian
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA; (T.B.); (P.C.); (Y.W.); (J.B.)
| | - Pedro Corral
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA; (T.B.); (P.C.); (Y.W.); (J.B.)
| | - Yuzhi Wang
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA; (T.B.); (P.C.); (Y.W.); (J.B.)
| | - Jordy Botello
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA; (T.B.); (P.C.); (Y.W.); (J.B.)
| | - Rick Kingston
- College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA;
| | - Tyler Daniels
- Thorne Research Inc., Industrial Road, 620 Omni Dr, Summerville, SC 29483, USA;
| | - Ramzi G. Salloum
- Department of Health Outcome & Biomedical Informatics, College of Medicine, University of Florida, Gainesville, FL 32610, USA;
| | - Edward Johnston
- The Association for Hawaiian Awa (kava), Pepe’ekeo, HI 96783, USA;
| | - Zhiguang Huo
- Department of Biostatistics, College of Public Health & Health Professions, College of Medicine, University of Florida, Gainesville, FL 32610, USA;
| | - Junxuan Lu
- Department of Pharmacology, Penn State University College of Medicine, Hershey, PA 17033, USA;
| | - Andrew C. Liu
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville, FL 32610, USA;
| | - Chengguo Xing
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA; (T.B.); (P.C.); (Y.W.); (J.B.)
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Celentano A, Yiannis C, Paolini R, Zhang P, Farah CS, Cirillo N, Yap T, McCullough M. Kava constituents exert selective anticancer effects in oral squamous cell carcinoma cells in vitro. Sci Rep 2020; 10:15904. [PMID: 32985597 PMCID: PMC7522996 DOI: 10.1038/s41598-020-73058-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 09/09/2020] [Indexed: 12/13/2022] Open
Abstract
Kava is a beverage made from the ground roots of the plant Piper Methysticum. Active compounds of Kava have previously been demonstrated to exert an antiproliferative effect through cell cycle arrest and promotion of apoptosis. Our aim was to investigate the in vitro effects of the main constituents derived from Kava on oral squamous cell carcinoma (OSCC) activity. Gas chromatography mass spectrometry (GCMS) was used to characterise the main constituents of two Kava preparations. Cell proliferation was assessed in two human OSCC cell lines (H400 and BICR56) and in normal oral keratinocytes (OKF6) treated with the identified Kava constituents, namely Flavokawain A (FKA), Flavokawain B (FKB), yangonin, kavain and methysticin using an MTS in vitro assay. Cell migration at 16 h was assessed using a Transwell migration assay. Cell invasion was measured at 22 h using a Matrigel assay. Cell adhesion was assessed at 90 min with a Cytoselect Adhesion assay. The two Kava preparations contained substantially different concentrations of the main chemical constituents. Treatment of malignant and normal oral keratinocyte cell lines with three of the identified constituents, 10 μg/ml FKA, 2.5 μg/ml FKB and 10 μg/ml yangonin, showed a significant reduction in cell proliferation in both H400 and BICR56 cancer cell lines but not in normal OKF6 cells. Remarkably, the same Kava constituents induced a significant reduction of OSCC cell migration and invasion. We have demonstrated, for the first time, that Kava constituents, FKA, FKB and yangonin have potential anticancer effects on OSCC. This highlights an avenue for further research of Kava constituents in the development of future cancer therapies to prevent and treat OSCC.
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Affiliation(s)
- Antonio Celentano
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC, 3053, Australia.
| | - Callisthenis Yiannis
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC, 3053, Australia
| | - Rita Paolini
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC, 3053, Australia
| | - Pangzhen Zhang
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, 142 Royal Parade, Parkville, VIC, 3052, Australia
| | - Camile S Farah
- Australian Centre for Oral Oncology Research and Education, Perth, WA, 6009, Australia.,Oral, Maxillofacial and Dental Surgery, Fiona Stanley Hospital, Murdoch, WA, 6150, Australia
| | - Nicola Cirillo
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC, 3053, Australia
| | - Tami Yap
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC, 3053, Australia
| | - Michael McCullough
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC, 3053, Australia
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9
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NF-κB inhibitors in treatment and prevention of lung cancer. Biomed Pharmacother 2020; 130:110569. [PMID: 32750649 DOI: 10.1016/j.biopha.2020.110569] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/12/2020] [Accepted: 07/26/2020] [Indexed: 12/27/2022] Open
Abstract
Intracellular signalling pathways have provided excellent resource for drug development particularly in the development of cancer therapeutics. A wide variety of malignancies common in human exhibit aberrant NF-κB constitutive expression which results in tumorigenic processes and cancer survival in a variety of solid tumour, including pancreatic cancer, lung, cervical, prostate, breast and gastric carcinoma. Numerous evidences indicate that NF-κB signalling mechanism is mainly involved in the progression of several cancers which may intensify an enhanced knowledge on its role in disease particularly lung tumorigenesis. This has led to tremendous research in designing a variety of NF-κB antagonists with enhanced clinical applications through different approaches the most common being suppression of IκB kinase (IKK) beta activity. Many NF-κB inhibitors for lung cancer are now under clinical trials. Preliminary results of clinical trials for several of these agents include small-molecule inhibitors and monoclonal antibodies. A few combinatorial treatment therapies are currently under investigation in the clinics and have shown promise, particularly NF-κB inhibition associated with lung cancer.
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Celentano A, Tran A, Testa C, Thayanantha K, Tan-Orders W, Tan S, Syamal M, McCullough MJ, Yap T. The protective effects of Kava (Piper Methysticum) constituents in cancers: A systematic review. J Oral Pathol Med 2019; 48:510-529. [PMID: 31172600 DOI: 10.1111/jop.12900] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 06/05/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Kava is a beverage made from the ground roots of the plant Piper Methysticum and has long-held a significant place within Pacific island communities. Active compounds were extracted from kava, and secondary metabolites include kavalactones, chalcones, cinnamic acid derivatives and flavanones. It is thought that components of kava may exert an antiproliferative effect through cell cycle arrest and promotion of apoptosis. METHODS We conducted a systematic review to summarize available evidence of the anticancer effects of kava components and investigate their potential use for oral squamous cell carcinoma (OSCC) treatment. Eligible studies were identified through a comprehensive search of OVID EMBASE, OVID MEDLINE and Web of Science, as at April 2018. RESULTS Of 39 papers that met the inclusion criteria, 32 included in vitro models and 13 included animal studies. A total of 26 different cancers were assessed with 32 studies solely assessing epithelial cancers, 6 mesenchymal cancers and 1 study including both. There was only one report assessing an OSCC cell line. Antiproliferative properties were demonstrated in 32 out of 39 papers. The most researched constituent of kava was flavokavain B followed by flavokavain A. Both were associated with increased expression of pro-apoptotic proteins and decreased expression of anti-apoptotic proteins. Further, they were associated with a dose-dependent reduction of angiogenesis. CONCLUSION There was heterogeneity of study models and methods of investigation across the studies identified. Components of kava appear to present an area of interest with chemotherapeutic potential in cancer prevention and treatment, particularly for epithelial neoplasms. To date, there is a paucity of literature of the utility of kava components in the prevention and treatment of oral squamous cell carcinoma.
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Affiliation(s)
- Antonio Celentano
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
| | - Andrew Tran
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
| | - Claire Testa
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
| | - Krishen Thayanantha
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
| | - William Tan-Orders
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
| | - Stephanie Tan
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
| | - Mitali Syamal
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
| | - Michael J McCullough
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
| | - Tami Yap
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
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Wang Y, Eans SO, Stacy HM, Narayanapillai SC, Sharma A, Fujioka N, Haddad L, McLaughlin J, Avery BA, Xing C. A stable isotope dilution tandem mass spectrometry method of major kavalactones and its applications. PLoS One 2018; 13:e0197940. [PMID: 29795658 PMCID: PMC5993114 DOI: 10.1371/journal.pone.0197940] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 03/26/2018] [Indexed: 12/13/2022] Open
Abstract
Kava is regaining its popularity with detailed characterizations warranted. We developed an ultraperformance liquid chromatography high-resolution tandem mass spectrometry (UPLC-MS/MS) method for major kavalactones (kavain, dihydrokavain, methysticin, dihydromethysticin and desmethoxyyangonin) with excellent selectivity and specificity. The method has been validated for different matrices following the Food and Drug Administration guidance of analytical procedures and methods validation. The scope of this method has been demonstrated by quantifying these kavalactones in two kava products, characterizing their tissue distribution and pharmacokinetics in mice, and detecting their presence in human urines and plasmas upon kava intake. As expected, the abundances of these kavalactones differed significantly in kava products. All of them exhibited a large volume of distribution with extensive tissue affinity and adequate mean residence time (MRT) in mice. This method also successfully quantified these kavalactones in human body fluids upon kava consumption at the recommended human dose. This UPLC-MS/MS method therefore can be used to characterize kava products and its pharmacokinetics in animals and in humans.
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Affiliation(s)
- Yi Wang
- Department of Medicinal Chemistry, University of Florida, Gainesville, Florida, United States of America
| | - Shainnel O. Eans
- Department of Pharmacodynamics, University of Florida, Gainesville, Florida, United States of America
| | - Heather M. Stacy
- Department of Pharmacodynamics, University of Florida, Gainesville, Florida, United States of America
| | - Sreekanth C. Narayanapillai
- Department of Medicinal Chemistry, University of Florida, Gainesville, Florida, United States of America
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Abhisheak Sharma
- Department of Pharmaceutics, University of Florida, Gainesville, Florida, United States of America
| | - Naomi Fujioka
- Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Linda Haddad
- Department of Family Community and Health System Sciences, University of Florida, Gainesville, Florida, United States of America
| | - Jay McLaughlin
- Department of Pharmacodynamics, University of Florida, Gainesville, Florida, United States of America
| | - Bonnie A. Avery
- Department of Pharmaceutics, University of Florida, Gainesville, Florida, United States of America
| | - Chengguo Xing
- Department of Medicinal Chemistry, University of Florida, Gainesville, Florida, United States of America
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, Minnesota, United States of America
- * E-mail:
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12
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Kautu BB, Phillips J, Steele K, Mengarelli MS, Nord EA. A Behavioral Survey of the Effects of Kavalactones on Caenorhabditis elegans Neuromuscular Transmission. J Exp Neurosci 2017; 11:1179069517705384. [PMID: 28615969 PMCID: PMC5462554 DOI: 10.1177/1179069517705384] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 03/23/2017] [Indexed: 12/16/2022] Open
Abstract
Kava is a plant root extract that is widely consumed by Pacific Islanders. Kava contains a class of lactone compounds called kavalactones. The sedative and anxiolytic effects of kava are likely attributed to the efficacies of kavalactones on the nervous system. Although some studies have implicated the potencies of certain kavalactone species on γ-aminobutyric acid transmission, evidence supporting the action of kavalactones on the eukaryotic neuromuscular junction (NMJ) and acetylcholine (ACh) transmission is scant. Here, we used behavioral assays to demonstrate the effects of kavalactones at the Caenorhabditis elegans NMJ. Our results suggest that kavalactones disrupt the inhibitory-excitatory balance at the NMJ. Such perturbation of NMJ activity is likely due to excess or prolonged ACh transmission. In addition, we found that kavain, a major constituent of kava, induced worm paralysis but not convulsions. Hence, the modulatory action of kavain could be distinct from the other kavalactone species.
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Affiliation(s)
| | | | - Kellie Steele
- Department of Biology, Greenville College, Greenville, IL, USA
| | | | - Eric A Nord
- Department of Biology, Greenville College, Greenville, IL, USA
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13
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Tang X, Amar S. Kavain Involvement in LPS-Induced Signaling Pathways. J Cell Biochem 2016; 117:2272-80. [PMID: 26917453 DOI: 10.1002/jcb.25525] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 02/22/2016] [Indexed: 12/17/2022]
Abstract
Kavain, a compound extracted from the Kava plant, Piper methysticum, is found to be involved in TNF-α expression in human and mouse cells via regulation of transcriptional factors such as NF-kB and LITAF. LITAF is known to activate the transcription of more than 20 cytokines that are involved in a variety of cellular processes and is associated with many inflammatory diseases, including angiogenesis, cancer, arthritis, and more. The modulation of LITAF is expected to positively affect cytokine-mediated diseases. Thus, intensive efforts have been deployed in search of LITAF inhibitors. In this work, we found that, in vitro, Kavain reduced LPS- induced TNF-α secretion in mouse macrophages, mouse bone marrow macrophages (BMM), and human peripheral blood mononuclear cells (HPBMC). We also found that Kavain treatment in RAW264.7 cells deactivated MyD88 and Akt, inhibited LITAF, and reduced the production of TNF-α, IL-27, and MIG in response to LPS. Similarly, it had a significant in vivo anti-inflammatory effect on wild-type (WT) mice that developed Collagen Antibody Induced Arthritis (CAIA). Overall, MyD88 was found to be an important mediator of the LPS-induced inflammatory response that can be distinguished from the NF-κB pathway. We also found that MyD88 is involved in the pathway linking LPS/LITAF to TNF-α. Therefore, given that Kavain modulates LPS-induced signaling pathways leading to cytokine expression, therapeutic interventions involving Kavain in inflammatory diseases are warranted. J. Cell. Biochem. 117: 2272-2280, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Xiaoren Tang
- Department of Molecular and Cell Biology, Center for Anti-Inflammatory Therapeutics, Boston University Goldman School of Dental Medicine, Boston, 02118, Massachusetts
| | - Salomon Amar
- Department of Molecular and Cell Biology, Center for Anti-Inflammatory Therapeutics, Boston University Goldman School of Dental Medicine, Boston, 02118, Massachusetts
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14
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Abstract
Kavain, an extract from the shrub Piper Methysticum, was recently reported to modulate TNF-α expression in both human and mouse cells via regulation of LPS-Induced TNF-Alpha Factor (LITAF). The purpose of the present study was to define the molecular pathway(s) associated with Kavain effects on TNF modulation. In vitro studies using WT mouse primary macrophages showed that Kavain significantly reduced E.coli LPS-induced TNF-α production but this effect was almost abrogated in LITAF-/- and ERK2-/- cells. Therefore we reintroduced the ERK2 gene in ERK2-/- cells and partially restored E.coli LPS-induced LITAF-mediated TNF-α production. The translocation of LITAF into to nucleus was found to be dependent on ERK2 S206 residue. Kavain inhibits LITAF/TNF-α expression via dephosphorylation of ERK2 in response to E.coli LPS. Finally, in vivo, Kavain had a significant anti-inflammatory effect on wild type mice that developed Collagen Antibody Induced Arthritis (CAIA), but only a minor effect in ERK2-/- mice also affected by CAIA. Based on these findings, we concluded that ERK2 may be the kinase upstream of LITAF with its Serine residue 206 being crucial for the regulation of LPS-induced TNF-α.
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Affiliation(s)
- Xiaoren Tang
- Center for Anti-Inflammatory Therapeutics, Molecular & Cell Biology Department, Boston University Goldman School of Dental Medicine, Boston, MA, 02118 USA
| | - Salomon Amar
- Center for Anti-Inflammatory Therapeutics, Molecular & Cell Biology Department, Boston University Goldman School of Dental Medicine, Boston, MA, 02118 USA
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15
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Affiliation(s)
- Yew-Min Tzeng
- Department of Applied Biochemistry, Chaoyang University of Technology, 168 Gifeng East Road, Wufeng, Taichung 41349, Taiwan, China
| | - Meng-Jen Lee
- Department of Applied Biochemistry, Chaoyang University of Technology, 168 Gifeng East Road, Wufeng, Taichung 41349, Taiwan, China
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16
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Cheng B, Lin Y, Kuang M, Fang S, Gu Q, Xu J, Wang L. Synthesis and Anti-neuroinflammatory Activity of Lactone Benzoyl Hydrazine and 2-nitro-1-phenyl-1H
-Indole Derivatives as p38α
MAPK Inhibitors. Chem Biol Drug Des 2015; 86:1121-30. [DOI: 10.1111/cbdd.12581] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 04/08/2015] [Accepted: 04/27/2015] [Indexed: 12/26/2022]
Affiliation(s)
- Bao Cheng
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine; Guangdong TCM Key Laboratory against Metabolic Diseases; Guangzhou Higher Education Mega Centre; Guangdong Pharmaceutical University; Guangzhou 510006 China
| | - Yongsheng Lin
- Research Center for Drug Discovery; School of Pharmaceutical Sciences; Sun Yat-Sen University; Guangzhou 510006 China
| | - Ming Kuang
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine; Guangdong TCM Key Laboratory against Metabolic Diseases; Guangzhou Higher Education Mega Centre; Guangdong Pharmaceutical University; Guangzhou 510006 China
| | - Sai Fang
- Research Center for Drug Discovery; School of Pharmaceutical Sciences; Sun Yat-Sen University; Guangzhou 510006 China
| | - Qiong Gu
- Research Center for Drug Discovery; School of Pharmaceutical Sciences; Sun Yat-Sen University; Guangzhou 510006 China
| | - Jun Xu
- Research Center for Drug Discovery; School of Pharmaceutical Sciences; Sun Yat-Sen University; Guangzhou 510006 China
| | - Laiyou Wang
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine; Guangdong TCM Key Laboratory against Metabolic Diseases; Guangzhou Higher Education Mega Centre; Guangdong Pharmaceutical University; Guangzhou 510006 China
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17
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Measuring the chemical and cytotoxic variability of commercially available kava (Piper methysticum G. Forster). PLoS One 2014; 9:e111572. [PMID: 25365244 PMCID: PMC4218769 DOI: 10.1371/journal.pone.0111572] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 10/03/2014] [Indexed: 02/07/2023] Open
Abstract
Formerly used world-wide as a popular botanical medicine to reduce anxiety, reports of hepatotoxicity linked to consuming kava extracts in the late 1990s have resulted in global restrictions on kava use and have hindered kava-related research. Despite its presence on the United States Food and Drug Administration consumer advisory list for the past decade, export data from kava producing countries implies that US kava imports, which are not publicly reported, are both increasing and of a fairly high volume. We have measured the variability in extract chemical composition and cytotoxicity towards human lung adenocarcinoma A549 cancer cells of 25 commercially available kava products. Results reveal a high level of variation in chemical content and cytotoxicity of currently available kava products. As public interest and use of kava products continues to increase in the United States, efforts to characterize products and expedite research of this potentially useful botanical medicine are necessary.
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Narayanapillai SC, Leitzman P, O'Sullivan MG, Xing C. Flavokawains a and B in kava, not dihydromethysticin, potentiate acetaminophen-induced hepatotoxicity in C57BL/6 mice. Chem Res Toxicol 2014; 27:1871-6. [PMID: 25185080 PMCID: PMC4203398 DOI: 10.1021/tx5003194] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
![]()
Anxiolytic
kava products have been associated with rare but severe
hepatotoxicity in humans. This adverse potential has never been captured
in animal models, and the responsible compound(s) remains to be determined.
The lack of such knowledge greatly hinders the preparation of a safer
kava product and limits its beneficial applications. In this study
we evaluated the toxicity of kava as a single entity or in combination
with acetaminophen (APAP) in C57BL/6 mice. Kava alone revealed no
adverse effects for long-term usage even at a dose of 500 mg/kg bodyweight.
On the contrary a three-day kava pretreatment potentiated APAP-induced
hepatotoxicity, resulted in an increase in serum ALT and AST, and
increased severity of liver lesions. Chalcone-based flavokawains A
(FKA) and B (FKB) in kava recapitulated its hepatotoxic synergism
with APAP while dihydromethysticin (DHM, a representative kavalactone
and a potential lung cancer chemopreventive agent) had no such effect.
These results, for the first time, demonstrate the hepatotoxic risk
of kava and its chalcone-based FKA and FKB in vivo and suggest that herb–drug interaction may account for the
rare hepatotoxicity associated with anxiolytic kava usage in humans.
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Affiliation(s)
- Sreekanth C Narayanapillai
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota , Minneapolis, Minnesota 55455, United States
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Leitzman P, Narayanapillai SC, Balbo S, Zhou B, Upadhyaya P, Shaik AA, O'Sullivan MG, Hecht SS, Lu J, Xing C. Kava blocks 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone-induced lung tumorigenesis in association with reducing O6-methylguanine DNA adduct in A/J mice. Cancer Prev Res (Phila) 2014; 7:86-96. [PMID: 24403291 DOI: 10.1158/1940-6207.capr-13-0301] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We previously reported the chemopreventive potential of kava against 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK)- and benzo(a)pyrene (BaP)-induced lung tumorigenesis in A/J mice during the initiation and postinitiation stages. In this study, we investigated the tumorigenesis-stage specificity of kava, the potential active compounds, and the underlying mechanisms in NNK-induced lung tumorigenesis in A/J mice. In the first experiment, NNK-treated mice were given diets containing kava at a dose of 5 mg/g of diet during different periods. Kava treatments covering the initiation stage reduced the multiplicity of lung adenomas by approximately 99%. A minimum effective dose is yet to be defined because kava at two lower dosages (2.5 and 1.25 mg/g of diet) were equally effective as 5 mg/g of diet in completely inhibiting lung adenoma formation. Daily gavage of kava (one before, during, and after NNK treatment) completely blocked lung adenoma formation as well. Kavalactone-enriched fraction B fully recapitulated kava's chemopreventive efficacy, whereas kavalactone-free fractions A and C were much less effective. Mechanistically, kava and fraction B reduced NNK-induced DNA damage in lung tissues with a unique and preferential reduction in O(6)-methylguanine (O(6)-mG), the highly tumorigenic DNA damage by NNK, correlating and predictive of efficacy on blocking lung adenoma formation. Taken together, these results demonstrate the outstanding efficacy of kava in preventing NNK-induced lung tumorigenesis in A/J mice with high selectivity for the initiation stage in association with the reduction of O(6)-mG adduct in DNA. They also establish the knowledge basis for the identification of the active compound(s) in kava.
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Affiliation(s)
- Pablo Leitzman
- University of Minnesota, Department of Medicinal Chemistry, College of Pharmacy, 8-101 WDH, 308 Harvard Street SE, Minneapolis, MN 55455.
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Anticancer cardamonin analogs suppress the activation of NF-kappaB pathway in lung cancer cells. Mol Cell Biochem 2014; 389:25-33. [PMID: 24390014 DOI: 10.1007/s11010-013-1923-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 12/06/2013] [Indexed: 12/29/2022]
Abstract
NF-kappaB pathway has been proven to be critical to survival of lung cancer cells, and many natural products from plants were shown to inhibit the activation of this pathway. In this study, we investigated the effects of two cardamonin analogs, 4,4'-dihydroxylchalcone (DHC) and 4,4'-dihydroxy-2'-methoxychalcone (DHMC), on survival of lung cancer cells and the involved mechanisms. MTT assay revealed that the two compounds potently decreased the survival of immortalized and primary lung cancer cells. DHC and DHMC were able to induce apoptosis in A549 and NCI-H460 cells. Immunoblotting, immunofluorescent staining, and luciferase reporter further demonstrated that the two compounds suppressed the activation of NF-kappaB pathway in lung cancer cells. PMA-mediated NF-kappaB reactivation abrogated the effect of DHC and DHMC on lung cancer cells. DHC and DHMC were also shown to suppress the growth of A549 xenograft in mice. Collectively, we verified two cardamonin analogs as novel compounds suppressing NF-kappaB signaling for lung cancer therapy.
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Li X, Xu X, Ji T, Liu Z, Gu M, Hoang BH, Zi X. Dietary feeding of Flavokawain A, a Kava chalcone, exhibits a satisfactory safety profile and its association with enhancement of phase II enzymes in mice. Toxicol Rep 2014; 1:2-11. [PMID: 25379458 PMCID: PMC4219529 DOI: 10.1016/j.toxrep.2014.02.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Flavokawain A (FKA), a major chalcone in the Kava plant, has recently demonstrated promising anti-cancer activities. A systematic evaluation of FKA's safety profile has not been reported before. In this study, male FVB/N mice were fed with an AIN-76A diet or AIN-76A diet supplemented with 0.6% (6 g/kg food) FKA or 0.6% commercial kava root extract (KRE) for three weeks. Dietary feeding of FKA did not affect food consumption and body weight. Histopathological examination of liver, kidney, colon, lung, heart, spleen, and thymus revealed no signs of FKA-induced toxicity. Biochemical serum analysis and histological examination confirmed normal organ function in FKA-treated mice. The cytotoxicity profile showed FKA had minimal side effects on bone marrow and small intestinal epithelial cells compared with Adriamycin. In addition, oral feeding of FKA increased activities of both glutathione S-transferase and quinone reductase in the liver, lung, prostate and bladder tissues of mice. In comparison, dietary feeding of 0.6% KRE increased liver/body weight ratio and decreased spleen, thymus, and testis/body weight ratios, as well as induced nodular proliferation in liver tissues. Therefore, dietary feeding FKA showed no adverse effects on major organ function and homeostasis in mice, suggesting the potential of FKA for chemoprevention study of human cancers.
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Affiliation(s)
- Xuesen Li
- Department of Urology, University of California, Irvine, Orange, CA 92868, USA
| | - Xia Xu
- Department of Urology, University of California, Irvine, Orange, CA 92868, USA
| | - Tao Ji
- Department of Orthopeadic Surgery, University of California, Irvine, Orange, CA 92868, USA
| | - Zhongbo Liu
- Department of Urology, University of California, Irvine, Orange, CA 92868, USA
| | - Mai Gu
- Department of Pathology and Laboratory Medicine, University of California, Irvine, Orange, CA 92868, USA
| | - Bang H Hoang
- Department of Orthopeadic Surgery, University of California, Irvine, Orange, CA 92868, USA
| | - Xiaolin Zi
- Department of Urology, University of California, Irvine, Orange, CA 92868, USA ; Department of Pharmacology, University of California, Irvine, Orange, CA 92868, USA ; Department of Pharmaceutical Sciences, University of California, Irvine, Orange, CA 92868, USA
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Triolet J, Shaik AA, Gallaher DD, O'Sullivan MG, Xing C. Reduction in colon cancer risk by consumption of kava or kava fractions in carcinogen-treated rats. Nutr Cancer 2012; 64:838-46. [PMID: 22693990 DOI: 10.1080/01635581.2012.689917] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Epidemiological studies suggest that kava reduces colon cancer risk. However, no experimental studies of the chemopreventive properties of kava toward colon cancer have been reported. Further, there are concerns regarding hepatotoxicity of kava. The goal of this study was to determine whether kava consumption reduces markers of colon cancer in an animal model and to study the safety of kava. An ethanolic extract and polar and nonpolar fractions of the kava extract were fed to rats for 12 days prior to, during, and after administration of dimethylhydrazine, a colon-specific carcinogen. After 14 wk, rats fed the nonpolar extract had a significant reduction in precancerous lesions [aberrant crypt (AC) foci (ACF)] as well as large (≥ 4 AC/ACF) sialomucin-only expressing foci, an indicator of greater tumorigenic potential, compared to the control group. Groups fed the ethanolic extract and polar kava fraction trended toward reductions in ACF and large sialomucin-only expressing foci. The combined kava groups had significantly fewer total AC, ACF, large ACF, and large sialomucin-only expressing foci compared to the control group. Histological examination found no hepatic lesions in animals consuming the kava diets, suggesting that kava is safe to consume. Our results support that kava may reduce colon cancer risk.
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Affiliation(s)
- Julie Triolet
- Department of Food Science and Nutrition, University of Minnesota, St Paul, Minnesota 55455, USA
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Soldi C, Moro AV, Pizzolatti MG, Correia CRD. Heck-Matsuda Arylation as a Strategy to Access Kavalactones Isolated from Polygala sabulosa, Piper methysticum, and Analogues. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200308] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Chen W, Li Z, Bai L, Lin Y. NF-kappaB in lung cancer, a carcinogenesis mediator and a prevention and therapy target. Front Biosci (Landmark Ed) 2011; 16:1172-85. [PMID: 21196225 DOI: 10.2741/3782] [Citation(s) in RCA: 165] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Lung cancer ranks as the first malignant tumor killer worldwide. Despite the knowledge that carcinogens from tobacco smoke and the environment constitute the main causes of lung cancer, the mechanisms for lung carcinogenesis are still elusive. Cancer development and progression depend on the balance between cell survival and death signals. Common cell survival signaling pathways are activated by carcinogens as well as by inflammatory cytokines, which contribute substantially to cancer development. As a major cell survival signal, nuclear factor-kappaB (NF-kappaB) is involved in multiple steps in carcinogenesis and in cancer cell's resistance to chemo- and radio-therapy. Recent studies with animal models and cell culture systems have established the links between NF-kappaB and lung carcinogenesis, highlighting the significance of targeting NF-kappa signaling pathway for lung cancer treatment and chemoprevention. In this review, we summarize progresses in understanding the NF-kappaB pathway in lung cancer development as well as in modulating NF-kappaB for lung cancer prevention and therapy.
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Affiliation(s)
- Wenshu Chen
- Molecular Biology and Lung Cancer Program, Lovelace Respiratory Research Institute, 2425 Ridgecrest DR SE, Albuquerque, NM 87108, USA
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