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Cai M, Li Q, Cao Y, Huang Y, Yao H, Zhao C, Wang J, Zhu H. Quercetin activates autophagy to protect rats ovarian granulosa cells from H 2O 2-induced aging and injury. Eur J Pharmacol 2024; 966:176339. [PMID: 38272342 DOI: 10.1016/j.ejphar.2024.176339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 01/17/2024] [Accepted: 01/17/2024] [Indexed: 01/27/2024]
Abstract
Autophagy is closely related to the aging of various organ systems, including ovaries. Quercetin has a variety of biological activities, including potential regulation of autophagy. However, whether quercetin-regulated autophagy activity affects the process of ovarian aging and injury has not been clarified yet. This study explores whether quercetin can resist H2O2-induced aging and injury of granulosa cells by regulating autophagy and its related molecular mechanisms in vitro experiments. The cell viability, endocrine function, cell aging, and apoptosis were detected to evaluate the effects of quercetin and autophagy regulators like 3-methyladenine and rapamycin. The levels of autophagy markers Atg5, Atg12, Atg16L, Lc3B II/I, and Beclin1 were determined by Western blot to assess the effects of quercetin, 3-methyladenine and rapamycin on autophagy. Our results showed quercetin resisted H2O2-induced granulosa cell aging and injury by activating protective autophagy. The treatment of 3-methyladenine and rapamycin confirmed the protective function of autophagy in H2O2-induced granulosa cells. 3-methyladenine treatment inhibited the expression of autophagy markers Atg5, Atg12, Atg16L, Lc3B II/I, and Beclin1 and abolished the positive effects on cell viability, estradiol secretion, and cell apoptosis activated by quercetin. In conclusion, quercetin activates autophagy by upregulating the expression of autophagy-related proteins to resist H2O2-induced aging and injury, which is crucial for stabilizing the function of granulosa cells under oxidative injury conditions and delaying aging. This study may explain the protective effects of quercetin on ovarian aging and injury from the perspective of regulating autophagy.
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Affiliation(s)
- Minghui Cai
- Department of Physiology, Harbin Medical University, Harbin, China
| | - Qiuyuan Li
- Department of Physiology, Harbin Medical University, Harbin, China; Department of Physiology, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Yang Cao
- Department of Physiology, Harbin Medical University, Harbin, China
| | - Yujia Huang
- Department of Physiology, Harbin Medical University, Harbin, China
| | - Haixu Yao
- Department of Physiology, Harbin Medical University, Harbin, China
| | - Chen Zhao
- Department of Physiology, Harbin Medical University, Harbin, China
| | - Jiao Wang
- Department of Physiology, Harbin Medical University, Harbin, China.
| | - Hui Zhu
- Department of Physiology, Harbin Medical University, Harbin, China.
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Shala AL, Arduino I, Salihu MB, Denora N. Quercetin and Its Nano-Formulations for Brain Tumor Therapy—Current Developments and Future Perspectives for Paediatric Studies. Pharmaceutics 2023; 15:pharmaceutics15030963. [PMID: 36986827 PMCID: PMC10057501 DOI: 10.3390/pharmaceutics15030963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/10/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
The development of efficient treatments for tumors affecting the central nervous system (CNS) remains an open challenge. Particularly, gliomas are the most malignant and lethal form of brain tumors in adults, causing death in patients just over 6 months after diagnosis without treatment. The current treatment protocol consists of surgery, followed using synthetic drugs and radiation. However, the efficacy of these protocols is associated with side effects, poor prognosis and with a median survival of fewer than two years. Recently, many studies were focused on applying plant-derived products to manage various diseases, including brain cancers. Quercetin is a bioactive compound derived from various fruits and vegetables (asparagus, apples, berries, cherries, onions and red leaf lettuce). Numerous in vivo and in vitro studies highlighted that quercetin through multitargeted molecular mechanisms (apoptosis, necrosis, anti-proliferative activity and suppression of tumor invasion and migration) effectively reduces the progression of tumor cells. This review aims to summarize current developments and recent advances of quercetin’s anticancer potential in brain tumors. Since all reported studies demonstrating the anti-cancer potential of quercetin were conducted using adult models, it is suggested to expand further research in the field of paediatrics. This could offer new perspectives on brain cancer treatment for paediatric patients.
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Affiliation(s)
- Aida Loshaj Shala
- Department of Drug Analysis and Pharmaceutical Technology, Faculty of Medicine, University of Prishtina, 10000 Prishtina, Kosovo
| | - Ilaria Arduino
- Department of Pharmacy—Pharmaceutical Sciences, University of Bari “Aldo Moro”, Orabona St. 4, 70125 Bari, Italy
| | - Mimoza Basholli Salihu
- Department of Drug Analysis and Pharmaceutical Technology, Faculty of Medicine, University of Prishtina, 10000 Prishtina, Kosovo
| | - Nunzio Denora
- Department of Pharmacy—Pharmaceutical Sciences, University of Bari “Aldo Moro”, Orabona St. 4, 70125 Bari, Italy
- Correspondence:
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Chen B, Li X, Wu L, Zhou D, Song Y, Zhang L, Wu Q, He Q, Wang G, Liu X, Hu H, Zhou W. Quercetin Suppresses Human Glioblastoma Migration and Invasion via GSK3β/β-catenin/ZEB1 Signaling Pathway. Front Pharmacol 2022; 13:963614. [PMID: 36386155 PMCID: PMC9663482 DOI: 10.3389/fphar.2022.963614] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 10/19/2022] [Indexed: 07/20/2023] Open
Abstract
High invasiveness is a biological and clinical characteristic of glioblastoma and predicts poor prognosis of patients. Quercetin, a natural flavonoid compound, exhibits anticancer activity. However, we have a limited understanding of the possible underlying mechanism of quercetin in glioblastoma. In this study, we investigated the anticancer effect of quercetin in human glioblastoma cells. Our results showed that quercetin markedly suppressed the viability of glioblastoma cells in vitro and in vivo, and significantly inhibited glioblastoma cell migration and invasion. Moreover, quercetin reversed EMT-like mesenchymal phenotype and reduced the expression levels of EMT-related markers. Furthermore, we found that quercetin suppressed GSK-3β/β-catenin/ZEB1 signaling in glioblastoma. Taken together, our results demonstrate that quercetin inhibited migration and invasion of human glioma cells by suppressing GSK3β/β-catenin/ZEB1 signaling. Our study provides evidence that quercetin is a promising therapeutic natural compound to treat glioblastoma.
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Affiliation(s)
- Bo Chen
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
| | - Xiaoli Li
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
- Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing Medical University, Chongqing, China
| | - Lihong Wu
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
| | - Duanfang Zhou
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
| | - Yi Song
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
| | - Limei Zhang
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
| | - Qiuya Wu
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
| | - Qichen He
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
| | - Gang Wang
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
| | - Xu Liu
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
| | - Hui Hu
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
- Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, Chongqing Medical University, Chongqing, China
| | - Weiying Zhou
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Drug Metabolism, Chongqing Medical University, Chongqing, China
- Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing Medical University, Chongqing, China
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Berk Ş, Kaya S, Akkol EK, Bardakçı H. A comprehensive and current review on the role of flavonoids in lung cancer-Experimental and theoretical approaches. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 98:153938. [PMID: 35123170 DOI: 10.1016/j.phymed.2022.153938] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 01/04/2022] [Accepted: 01/12/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND It is well-known that flavonoids, which can be easily obtained from many fruits and vegetables are widely preferred in the treatment of some important diseases. Some researchers noted that these chemical compounds exhibit high inhibition effect against various cancer types. Many experimental studies proving this ability of the flavonoids with high antioxidant activity are available in the literature. PUROPOSE The main aim of this review is to summarize comprehensively anticancer properties of flavonoids against the lung cancer in the light of experimental studies and well-known theory and electronic structure principles. In this review article, more detailed and current information about the using of flavonoids in the treatment of lung cancer is presented considering theoretical and experimental approaches. STUDY DESIGN In addition to experimental studies including the anticancer effects of flavonoids, we emphasized the requirement of the well-known electronic structure principle in the development of anticancer drugs. For this aim, Conceptual Density Functional Theory should be considered as a powerful tool. Searching the databases including ScienceDirect, PubMed and Web of Science, the suitable reference papers for this project were selected. METHODS Theoretical tools like DFT and Molecular Docking provides important clues about anticancer behavior and drug properties of molecular systems. Conceptual Density Functional Theory and CDFT based electronic structure principles and rules like Hard and Soft Acid-Base Principle (HSAB), Maximum Hardness Principle, Minimum Polarizability, Minimum Electrophilicity Principles and Maximum Composite Hardness Rule introduced by one of the authors of this review are so useful to predict the mechanisms and powers of chemical systems. Especially, it cannot be ignored the success of HSAB Principle in the explanations and highlighting of biochemical interactions. RESULTS Both theoretical analysis and experimental studies confirmed that flavonoids have higher inhibition effect against lung cancer. In addition to many superior properties like anticancer activity, antimicrobial activity, antioxidant activity, antidiabetic effect of flavonoids, their toxicities are also explained with the help of published popular papers. Action modes of the mentioned compounds are given in detail. CONCLUSION The review includes detailed information about the mentioned electronic structure principles and rules and their applications in the cancer research. In addition, the epidemiology and types of lung cancer anticancer activity of flavonoids in lung cancer are explained in details.
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Affiliation(s)
- Şeyda Berk
- Faculty of Science, Department of Molecular Biology and Genetics, Sivas Cumhuriyet University, Sivas 58140, Turkey
| | - Savaş Kaya
- Health Services Vocational School, Department of Pharmacy, Sivas Cumhuriyet University, Sivas 58140, Turkey.
| | - Esra Küpeli Akkol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Etiler, Ankara 06330, Turkey
| | - Hilal Bardakçı
- Department of Pharmacognosy, Faculty of Pharmacy, Acıbadem Mehmet Ali Aydınlar University, Istanbul 34752, Turkey
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A review on anti-cancer properties of Quercetin in breast cancer. Life Sci 2020; 248:117463. [DOI: 10.1016/j.lfs.2020.117463] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 02/10/2020] [Accepted: 02/21/2020] [Indexed: 12/19/2022]
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Dekant W. Tetrahydrofuran-induced tumors in rodents are not relevant to humans: Quantitative weight of evidence analysis of mode of action information does not support classification of tetrahydrofuran as a possible human carcinogen. Regul Toxicol Pharmacol 2019; 109:104499. [DOI: 10.1016/j.yrtph.2019.104499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 02/05/2023]
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Abstract
The important renal tumors that can be induced by exposure of rats to chemical carcinogens are renal tubule tumors (RTTs) derived from tubule epithelium; renal pelvic carcinoma derived from the urothelial lining of the pelvis; renal mesenchymal tumors (RMTs) derived from the interstitial connective tissue; and nephroblastoma derived from the metanephric primordia. However, almost all of our knowledge concerning mechanisms of renal carcinogenesis in the rodent pertains to the adenomas and carcinomas originating from renal tubule epithelium. Currently, nine mechanistic pathways can be identified in either the rat or mouse following chemical exposure. These include direct DNA reactivity, indirect DNA reactivity through free radical formation, multiphase bioactivation involving glutathione conjugation, mitotic disruption, sustained cell proliferation from direct cytotoxicity, sustained cell proliferation by disruption of a physiologic process (alpha 2u-globulin nephropathy), exaggerated pharmacologic response, species-dominant metabolic pathway, and chemical exacerbation of chronic progressive nephropathy. Spontaneous occurrence of RTTs in the rat will be included since one example is a confounder for interpreting kidney tumor results in chemical carcinogenicity studies in rats.
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Andres S, Pevny S, Ziegenhagen R, Bakhiya N, Schäfer B, Hirsch-Ernst KI, Lampen A. Safety Aspects of the Use of Quercetin as a Dietary Supplement. Mol Nutr Food Res 2017; 62. [PMID: 29127724 DOI: 10.1002/mnfr.201700447] [Citation(s) in RCA: 287] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 09/13/2017] [Indexed: 12/13/2022]
Abstract
The flavonoid quercetin is frequently found in low amounts as a secondary plant metabolite in fruits and vegetables. Isolated quercetin is also marketed as a dietary supplement, mostly as the free quercetin aglycone, and frequently in daily doses of up to 1000 mg d-1 exceeding usual dietary intake levels. The present review is dedicated to safety aspects of isolated quercetin used as single compound in dietary supplements. Among the numerous published human intervention studies, adverse effects following supplemental quercetin intake have been rarely reported and any such effects were mild in nature. Published adequate scientific data for safety assessment in regard to the long-term use (>12 weeks) of high supplemental quercetin doses (≥1000 mg) are currently not available. Based on animal studies involving oral quercetin application some possible critical safety aspects could be identified such as the potential of quercetin to enhance nephrotoxic effects in the predamaged kidney or to promote tumor development especially in estrogen-dependent cancer. Furthermore, animal and human studies with single time or short-term supplemental quercetin application revealed interactions between quercetin and certain drugs leading to altered drug bioavailability. Based on these results, some potential risk groups are discussed in the present review.
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Affiliation(s)
- Susanne Andres
- Department of Food Safety, Former employee of the German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Sophie Pevny
- Department of Food Safety, Former employee of the German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Rainer Ziegenhagen
- Department of Food Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Nadiya Bakhiya
- Department of Food Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Bernd Schäfer
- Department of Food Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | | | - Alfonso Lampen
- Department of Food Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
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9
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Wang H, Wu X, Lezmi S, Li Q, Helferich WG, Xu Y, Chen H. Extract of Ginkgo biloba exacerbates liver metastasis in a mouse colon cancer Xenograft model. Altern Ther Health Med 2017; 17:516. [PMID: 29197355 PMCID: PMC5712166 DOI: 10.1186/s12906-017-2014-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 11/17/2017] [Indexed: 12/20/2022]
Abstract
Background Metastasis refers to the spread of a primary tumor cell from the primary site to other locations in the body and it is generally associated with the severity of a tumor. Extract of Ginkgo biloba (EGb) contains various bioactive compounds and it exerts beneficial effects including improvements in brain function and reduced risk of cardiovascular diseases. On the other hand, increased risk of thyroid and liver cancers by EGb have been reported in animals. Methods A colon cancer metastasis model was established using intrasplenic injection of a human colon cancer cell line, SW620-luc in athymic mice to investigate the potential impact of EGb on colon cancer progression. After tumor establishment, EGb was intraperitonically injected daily for 5 wks. Results EGb significantly increased the rate of metastasis in mouse liver and decreased the number of necrotic and apoptotic cells in the metastatic liver when compared to the control. Meanwhile, EGb significantly induced proliferation of tumor cells in the metastatic liver, indicated by increased staining of Ki67 and H3S10p. mRNA expression of genes involved in cell cycle, metastasis, apoptosis, and oxidative stress were altered by EGb treatment in livers with tumors. Moreover, EGb activated the stress-responsive MAPK pathways in the liver with metastatic tumors. Conclusions EGb exacerbated liver metastasis in a mouse colon cancer metastasis model. This is potentially due to the increased tumor cell proliferation involving stimulated MAPK pathways. Electronic supplementary material The online version of this article (10.1186/s12906-017-2014-7) contains supplementary material, which is available to authorized users.
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Solano MDLM, Rocha NS, Barbisan LF, Franchi CADS, Spinardi-Barbisan ALT, de Oliveira MLCS, Salvadori DMF, Ribeiro LR, de Camargo JLV. Alternative Multiorgan Initiation–Promotion Assay for Chemical Carcinogenesis in the Wistar Rat. Toxicol Pathol 2016; 44:1146-1159. [DOI: 10.1177/0192623316678931] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The medium-term multiorgan initiation–promotion chemical bioassay (diethylnitrosamine, methyl-nitrosourea, butyl-hydroxybutylnitrosamine, dihydroxypropylnitrosamine, dimethylhydrazine [DMBDD]) with the Fischer 344 rat was proposed as an alternative to the conventional 2-year carcinogenesis bioassay for regulatory purposes. The acronym DMBDD stands for the names of five genotoxic agents used for initiation of multiorgan carcinogenesis. The Brazilian Agency for the Environment officially recognized a variation of this assay (DMBDDb) as a valid method to assess the carcinogenic potential of agrochemicals. Different from the original protocol, this DMBDDb is 30-week long, uses Wistar rats and two positive control groups exposed to carcinogenesis promoters sodium phenobarbital (PB) or 2-acetylaminofluorene (2-AAF). This report presents the experience of an academic laboratory with the DMBDDb assay and contributes to the establishment of this alternative DMBDD bioassay in a different rat strain. Frequent lesions observed in positive groups to evaluate the promoting potential of pesticides and the immunohistochemical expressions of liver cytochrome P450 (CYP) 2B1/2B2 and CYP1A2 enzymes were assessed. Commonly affected organs were liver, kidney, intestines, urinary bladder, and thyroid. PB promoting activity was less evident than that of 2-AAF, especially in males. This study provides a repository of characteristic lesions occurring in positive control animals submitted to a modified alternative 2-stage multiorgan protocol for carcinogenesis in Wistar rat.
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Affiliation(s)
| | - Noeme Souza Rocha
- Department of Clinical Medicine, Faculty of Veterinary Medicine and Zootechnology, UNESP—São Paulo State University, Botucatu, São Paulo, Brazil
| | - Luis Fernando Barbisan
- Department of Morphology, Bioscience Institute, UNESP—São Paulo State University, Botucatu, São Paulo, Brazil
| | | | | | | | | | - Lúcia Regina Ribeiro
- Department of Pathology, Botucatu Medical School, UNESP—São Paulo State University, Botucatu, São Paulo, Brazil
| | - João Lauro Viana de Camargo
- Department of Pathology, Botucatu Medical School, UNESP—São Paulo State University, Botucatu, São Paulo, Brazil
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Ninety-day toxicity and single-dose toxicokinetics study of alpha-glycosyl isoquercitrin in Sprague-Dawley rats. Food Chem Toxicol 2016; 97:354-366. [DOI: 10.1016/j.fct.2016.09.030] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 09/24/2016] [Accepted: 09/27/2016] [Indexed: 01/09/2023]
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12
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Quercetin tests negative for genotoxicity in transcriptome analyses of liver and small intestine of mice. Food Chem Toxicol 2015; 81:34-39. [DOI: 10.1016/j.fct.2015.04.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Revised: 03/31/2015] [Accepted: 04/02/2015] [Indexed: 12/30/2022]
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El-Denshary ES, Aljawish A, El-Nekeety AA, Hassan NS, Saleh RH, Rihn BH, Abdel-Wahhab MA. Possible Synergistic Effect and Antioxidant Properties of Chitosan Nanoparticles and Quercetin against Carbon Tetrachloride-Induce Hepatotoxicity in Rats. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/snl.2015.52005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Hollinger K, Shanely RA, Quindry JC, Selsby JT. Long-term quercetin dietary enrichment decreases muscle injury in mdx mice. Clin Nutr 2014; 34:515-22. [PMID: 24998094 DOI: 10.1016/j.clnu.2014.06.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 05/07/2014] [Accepted: 06/10/2014] [Indexed: 11/16/2022]
Abstract
BACKGROUND & AIMS Duchenne muscular dystrophy results from a mutation in the dystrophin gene, which leads to a dystrophin-deficiency. Dystrophic muscle is marked by progressive muscle injury and loss of muscle fibers. Activation of the PGC-1α pathway has been previously shown to decrease disease-related muscle damage. Oral administration of the flavonol, quercetin, appears to be an effective and safe method to activate the PGC-1α pathway. The aim of this investigation was to determine the extent to which long term dietary quercetin enrichment would decrease muscle injury in dystrophic skeletal muscle. We hypothesized that a quercetin enriched diet would rescue dystrophic muscle from further decline and increase utrophin abundance. METHODS Beginning at three-months of age and continuing to nine-months of age mdx mice (n = 10/group) were assigned to either to mdx-control receiving standard chow or to mdx-quercetin receiving a 0.2% quercetin-enriched diet. At nine-months of age mice were sacrificed and costal diaphragms collected. One hemidiaphragm was used for histological analysis and the second hemidiaphragm was used to determine gene expression via RT-qPCR. RESULTS The diaphragm from the mdx-quercetin group had 24% (p ≤ 0.05) more muscle fibers/area and 34% (p ≤ 0.05) fewer centrally nucleated fibers compared to the mdx-control group. Further, there were 44% (p ≤ 0.05) fewer infiltrating immune cells/area, a corresponding 31% (p ≤ 0.05) reduction in TNF gene expression, and a near 50% reduction in fibrosis. The quercetin-enriched diet increased expression of genes associated with oxidative metabolism but did not increase utrophin protein abundance. CONCLUSIONS Long-term quercetin supplementation decreased disease-related muscle injury in dystrophic skeletal muscle; however the role of PGC-1α pathway activation as a mediator of this response is unclear.
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Affiliation(s)
- Katrin Hollinger
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA
| | - R Andrew Shanely
- Human Performance Laboratory, Appalachian State University, North Carolina Research Campus, Kannapolis, NC 28081, USA; Appalachian State University, College of Health Sciences, Boone, NC, USA
| | - John C Quindry
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA
| | - Joshua T Selsby
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA.
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Russo GL, Russo M, Spagnuolo C, Tedesco I, Bilotto S, Iannitti R, Palumbo R. Quercetin: a pleiotropic kinase inhibitor against cancer. Cancer Treat Res 2014; 159:185-205. [PMID: 24114481 DOI: 10.1007/978-3-642-38007-5_11] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Increased consumption of fruits and vegetables can represent an easy strategy to significantly reduce the incidence of cancer. From this observation, derived mostly from epidemiological data, the new field of chemoprevention has emerged in the primary and secondary prevention of cancer. Chemoprevention is defined as the use of natural or synthetic compounds able to stop, reverse, or delay the process of tumorigenesis in its early stages. A large number of phytochemicals are potentially capable of simultaneously inhibiting and modulating several key factors regulating cell proliferation in cancer cells. Quercetin is a flavonoid possessing potential chemopreventive properties. It is a functionally pleiotropic molecule, possessing multiple intracellular targets, affecting different cell signaling processes usually altered in cancer cells, with limited toxicity on normal cells. Simultaneously targeting multiple pathways may help to kill malignant cells and slow down the onset of drug resistance. Among the different substrates triggered by quercetin, we have reviewed the ability of the molecule to inhibit protein kinases involved in deregulated cell growth in cancer cells.
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Affiliation(s)
- Gian Luigi Russo
- Istituto Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche, 83100, Avellino, Italy,
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Melnick RL, Ward JM, Huff J. War on Carcinogens: Industry Disputes Human Relevance of Chemicals Causing Cancer in Laboratory Animals Based on Unproven Hypotheses, Using Kidney Tumors as an Example. INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HEALTH 2013; 19:255-60. [DOI: 10.1179/1077352513z.00000000090] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Hard GC, Banton MI, Bretzlaff RS, Dekant W, Fowles JR, Mallett AK, McGregor DB, Roberts KM, Sielken RL, Valdez-Flores C, Cohen SM. Consideration of rat chronic progressive nephropathy in regulatory evaluations for carcinogenicity. Toxicol Sci 2013; 132:268-75. [PMID: 23104430 PMCID: PMC3595520 DOI: 10.1093/toxsci/kfs305] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 10/09/2012] [Indexed: 12/31/2022] Open
Abstract
Chronic progressive nephropathy (CPN) is a spontaneous renal disease of rats which can be a serious confounder in toxicology studies. It is a progressive disease with known physiological factors that modify disease progression, such as high dietary protein. The weight of evidence supports an absence of a renal counterpart in humans. There is extensive evidence that advanced CPN, particularly end-stage kidney, is a risk factor for development of a background incidence of atypical tubule hyperplasia and renal tubule tumors (RTT). The likely cause underlying this association with tubule neoplasia is the long-term increased tubule cell proliferation that occurs throughout CPN progression. As a variety of chemicals are able to exacerbate CPN, there is a potential for those exacerbating the severity up to and including end-stage kidney to cause a marginal increase in RTT and their precursor lesions. Extensive statistical analysis of National Toxicology Program studies shows a strong correlation between high-grade CPN, especially end-stage CPN, and renal tumor development. CPN as a mode of action (MOA) for rat RTT has received attention from regulatory authorities only recently. In the absence of toxic effects elsewhere, this does not constitute a carcinogenic effect of the chemical but can be addressed through a proposed MOA approach for regulatory purposes to reach a decision that RTT, developing as a result of CPN exacerbation in rats, have no relevance for human risk assessment. Guidelines are proposed for evaluation of exacerbation of CPN and RTT as a valid MOA for a given chemical.
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Affiliation(s)
- Gordon C Hard
- Private Consultant, 203 Paku Drive, Tairua 3508, New Zealand.
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Quercetin solid lipid microparticles: a flavonoid for inhalation lung delivery. Eur J Pharm Sci 2013; 49:278-85. [PMID: 23541500 PMCID: PMC7127037 DOI: 10.1016/j.ejps.2013.03.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 02/18/2013] [Accepted: 03/13/2013] [Indexed: 11/30/2022]
Abstract
Purpose The aim of the present work was to develop solid lipid microparticles (SLMs), as dry powders containing quercetin for direct administration to the lung. Methods Quercetin microparticles were prepared by o/w emulsification via a phase inversion technique, using tristearin as the lipid component and phosphatidylcholine as an emulsifier. The quercetin SLMs were characterised for morphology, drug loading (15.5% ± 0.6, which corresponded to an encapsulation efficiency of 71.4%), particle size distribution, response to humidity, crystallinity, thermal behaviour and in vitro respirable fraction. Furthermore, the toxicity and the in vitro transport of the SLMs on an air liquid interface model of the Calu-3 cell line were also investigated using a modified twin-stage impinger apparatus. Results Results showed that quercetin SLMs could be formulated as dry powder suitable for inhalation drug delivery (20.5 ± 3.3% fine particle fraction ⩽4.46 μm) that was absorbed, via a linear kinetic model across the Calu-3 monolayer (22.32 ± 1.51% over 4 h). In addition, quercetin SLMs were shown to be non-toxic at the concentrations investigated. Interestingly, no apical to basolateral transport of the micronised quercetin was observed over the period of study. Conclusions These observations suggest quercetin diffusion was enhanced by the presence of the lipid/emulsifying excipients in the SLMs; however further studies are necessary to elucidate the exact mechanisms.
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Perry R, Thompson CA, Earnhardt JN, Wright DJ, Bailey S, Komm B, Cukierski MA. Renal Tumors in Male Rats Following Long-term Administration of Bazedoxifene, a Tissue-selective Estrogen Receptor Modulator. Toxicol Pathol 2013; 41:1001-10. [DOI: 10.1177/0192623313477255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Bazedoxifene acetate (BZA) is a selective estrogen receptor modulator that is approved in a number of countries for the prevention and/or treatment of osteoporosis in postmenopausal women. To assess carcinogenic potential, BZA was administered ad libitum in the diet to male and female rats for 2 years. The achieved mean dosages of BZA were approximately 1.31 to 56.9 mg/kg/day at dietary concentrations of 0.003% to 0.1%. BZA treatment resulted in a reduction and a delayed onset in total tumor burden in both male and female rats. Survival rates were enhanced due to decreased pituitary and mammary tumors and decreased body weight gain in BZA-treated animals compared with controls. In male rats only, an increase in renal tubular tumors was observed. The greater increase in tumor incidence in male rats given BZA was associated with the increased survival and increased time for development of late onset tumors. These findings are consistent with a non-genotoxic mechanism, unique to male rats, that involves test article–induced corticomedullary mineralization, renal tubular injury, and exacerbation of naturally occurring chronic progressive nephropathy in aged male rats that led to a sequela of proliferative changes and tumor formation.
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Affiliation(s)
- Rick Perry
- Drug Safety Research & Development, Pfizer, Groton, Connecticut, USA
| | | | - J. Nicole Earnhardt
- Pharmacokinetics, Dynamics, and Metabolism, Pfizer, La Jolla, California, USA
| | - David J. Wright
- Drug Safety Research & Development, Pfizer, Groton, Connecticut, USA
| | - Steven Bailey
- Drug Safety Research & Development, Pfizer, Groton, Connecticut, USA
| | - Barry Komm
- Medical Affairs, Pfizer, Collegeville, Pennsylvania, USA
| | - Mark A. Cukierski
- Drug Safety Research & Development, Pfizer, Groton, Connecticut, USA
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Gomes C, Lourenço ELB, Liuti ÉB, Duque AO, Nihi F, Lourenço AC, Mendes TC, Gasparotto Junior A, Dalsenter PR. Evaluation of subchronic toxicity of the hydroethanolic extract of Tropaeolum majus in Wistar rats. JOURNAL OF ETHNOPHARMACOLOGY 2012; 142:481-487. [PMID: 22633983 DOI: 10.1016/j.jep.2012.05.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Revised: 05/07/2012] [Accepted: 05/11/2012] [Indexed: 06/01/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The use of medicinal plants for the treatment of diseases usually comes from the belief that they present low toxicity due their natural origin. However, it is necessary a toxicological and pharmacological evaluation for these plants. Tropaeolum majus is a medicinal plant used in popular medicine to treat several diseases, including cardiovascular disorders, urinary tract infections and asthma. Even though several studies proved its therapeutic effects, there are few toxicological studies with this species. AIM OF THE STUDY The present study was carried out to evaluate the subchronic toxicity of the hydroethanolic extract obtained from leaves of T. majus (HETM) in Wistar rats. MATERIAL AND METHODS Male and female Wistar rats received three doses of HETM (75, 375 and 750 mg/kg) for 28 days. After the treatments biochemical, hematological and histopathological parameters were analyzed. RESULTS No significant alterations in the animal's body weight gain, relative organs weight, serum biochemical analysis, hematological or histopathological analyses of liver, kidneys and spleen were observed. CONCLUSIONS These results demonstrate the absence of subchronic toxicity due to oral treatment with HETM for 28 days in Wistar rats. However, other toxicological studies are necessary to evaluate the total safety of this plant.
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Affiliation(s)
- Caroline Gomes
- Department of Pharmacology, Federal University of Paraná, Curitiba, PR, Brazil
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21
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Melnick RL, Burns KM, Ward JM, Huff J. Chemically exacerbated chronic progressive nephropathy not associated with renal tubular tumor induction in rats: an evaluation based on 60 carcinogenicity studies by the national toxicology program. Toxicol Sci 2012; 128:346-56. [PMID: 22539614 DOI: 10.1093/toxsci/kfs156] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Chronic progressive nephropathy (CPN) is a common age-related degenerative-regenerative disease of the kidney that occurs in both sexes of most strains of rats. Recently, claims have been made that enhanced CPN is a mode of action for chemically induced kidney tumors in male rats and that renal tubular tumors (RTTs) induced by chemicals that concomitantly exacerbate CPN are not relevant for human cancer risk assessments. Although CPN is an observable histopathological lesion that may be modified by diet, the etiology of this disease and the mechanisms for its exacerbation by chemicals are unknown, and it fails to meet fundamental principles for defining carcinogenic modes of action and human relevance. Our comprehensive evaluation of possible relationships between exacerbated CPN and induction of RTTs in 58 carcinogenicity studies, conducted by the National Toxicology Program, in male and 11 studies in female F344 rats using 60 chemicals revealed widespread inconsistency in the claimed association. Because the proposed hypothesis lacks evidence of biological plausibility, and due to inconsistent relationships between exacerbated CPN and kidney tumor incidence in carcinogenicity studies in rats, dismissing the human relevance of kidney tumors induced by chemicals that also exacerbate CPN in rats would be wrong.
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Affiliation(s)
- Ronald L Melnick
- Ron Melnick Consulting, LLC, Chapel Hill , North Carolina 27514, USA.
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Hard GC, Betz LJ, Seely JC. Association of Advanced Chronic Progressive Nephropathy (CPN) with Renal Tubule Tumors and Precursor Hyperplasia in Control F344 Rats from Two-Year Carcinogenicity Studies. Toxicol Pathol 2012; 40:473-81. [DOI: 10.1177/0192623311431948] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
| | - Laura J. Betz
- SRA International, Inc., Research Triangle Park, North Carolina, USA
| | - John Curtis Seely
- Experimental Pathology Laboratories, Inc., Research Triangle Park, North Carolina, USA
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Konietschke F, Hothorn LA. Evaluation of Toxicological Studies Using a Nonparametric Shirley-Type Trend Test for Comparing Several Dose Levels with a Control Group. Stat Biopharm Res 2012. [DOI: 10.1080/19466315.2011.633861] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Travlos GS, Hard GC, Betz LJ, Kissling GE. Chronic progressive nephropathy in male F344 rats in 90-day toxicity studies: its occurrence and association with renal tubule tumors in subsequent 2-year bioassays. Toxicol Pathol 2011; 39:381-9. [PMID: 21422264 DOI: 10.1177/0192623310388432] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The occurrence and severity of spontaneous chronic progressive nephropathy (CPN) in control male F344 rats as well as the frequency of treatment-related CPN exacerbation were histopathologically reevaluated. A series of 43 National Toxicology Program (NTP) 90-day toxicity studies comparing the influence of NIH-07 or NTP-2000 diets was examined. Relationships between the histopathologic findings at 90 days and renal tubule proliferative lesions recorded in subsequent 2-year bioassays for 24 chemicals were statistically analyzed. CPN lesions were observed in 100% of the control male rats regardless of diet, but CPN was more severe in control rats fed NIH-07. Approximately one-third of the 90-day studies demonstrated a treatment-related exacerbation of CPN severity, which was independent of diet. For chemicals that proceeded to 2-year bioassays, all studies with a statistically significant increase in renal tubule tumors (RTT) at 2 years had treatment-related exacerbation of CPN in the 90-day and 2-year studies. These findings indicate that CPN occurs ubiquitously in young male F344 rats and that treatment-related exacerbation of CPN in 90-day studies is a relatively common occurrence, having the potential to be predictive of an increased incidence of RTT in subsequent 2-year bioassays.
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Affiliation(s)
- Greg S Travlos
- National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina, USA.
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25
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Hard GC, Bruner RH, Cohen SM, Pletcher JM, Regan KS. Renal histopathology in toxicity and carcinogenicity studies with tert-butyl alcohol administered in drinking water to F344 rats: A pathology working group review and re-evaluation. Regul Toxicol Pharmacol 2011; 59:430-6. [DOI: 10.1016/j.yrtph.2011.01.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 01/18/2011] [Accepted: 01/20/2011] [Indexed: 01/11/2023]
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Andersen FA, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG, Shank RC, Slaga TJ, Snyder PW. Final Report of the Cosmetic Ingredient Review Expert Panel Amended Safety Assessment of Calendula officinalis—Derived Cosmetic Ingredients. Int J Toxicol 2010; 29:221S-43. [DOI: 10.1177/1091581810384883] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Calendula officinalis extract, C officinalis flower, C officinalis flower extract, C officinalis flower oil, and C officinalis seed oil are cosmetic ingredients derived from C officinalis. These ingredients may contain minerals, carbohydrates, lipids, phenolic acids, flavonoids, tannins, coumarins, sterols and steroids, monoterpenes, sesquiterpenes, triterpenes, tocopherols, quinones, amino acids, and resins. These ingredients were not significantly toxic in single-dose oral studies using animals. The absence of reproductive/developmental toxicity was inferred from repeat-dose studies of coriander oil, with a similar composition. Overall, these ingredients were not genotoxic. They also were not irritating, sensitizing, or photosensitizing in animal or clinical tests but may be mild ocular irritants. The Cosmetic Ingredient Review (CIR) Expert Panel concluded that these ingredients are safe for use in cosmetics in the practices of use and concentration given in this amended safety assessment.
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Affiliation(s)
- F. Alan Andersen
- Cosmetic Ingredient Review, 1101 17th Street, NW, Suite
412, Washington, DC 20036, USA,
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27
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Pyle LC, Fulton JC, Sloane PA, Backer K, Mazur M, Prasain J, Barnes S, Clancy JP, Rowe SM. Activation of the cystic fibrosis transmembrane conductance regulator by the flavonoid quercetin: potential use as a biomarker of ΔF508 cystic fibrosis transmembrane conductance regulator rescue. Am J Respir Cell Mol Biol 2010; 43:607-616. [PMID: 20042712 PMCID: PMC2970857 DOI: 10.1165/rcmb.2009-0281oc] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Accepted: 10/24/2009] [Indexed: 12/10/2023] Open
Abstract
Therapies to correct the ΔF508 cystic fibrosis transmembrane conductance regulator (CFTR) folding defect require sensitive methods to detect channel activity in vivo. The β₂ adrenergic receptor agonists, which provide the CFTR stimuli commonly used in nasal potential difference assays, may not overcome the channel gating defects seen in ΔF508 CFTR after plasma membrane localization. In this study, we identify an agent, quercetin, that enhances the detection of surface ΔF508 CFTR, and is suitable for nasal perfusion. A screen of flavonoids in CFBE41o⁻ cells stably transduced with ΔF508 CFTR, corrected to the cell surface with low temperature growth, revealed that quercetin stimulated an increase in the short-circuit current. This increase was dose-dependent in both Fisher rat thyroid and CFBE41o⁻ cells. High concentrations inhibited Cl⁻ conductance. In CFBE41o⁻ airway cells, quercetin (20 μg/ml) activated ΔF508 CFTR, whereas the β₂ adrenergic receptor agonist isoproterenol did not. Quercetin had limited effects on cAMP levels, but did not produce detectable phosphorylation of the isolated CFTR R-domain, suggesting an activation independent of channel phosphorylation. When perfused in the nares of Cftr(+) mice, quercetin (20 μg/ml) produced a hyperpolarization of the potential difference that was absent in Cftr(-/-) mice. Finally, quercetin-induced, dose-dependent hyperpolarization of the nasal potential difference was also seen in normal human subjects. Quercetin activates CFTR-mediated anion transport in respiratory epithelia in vitro and in vivo, and may be useful in studies intended to detect the rescue of ΔF508 CFTR by nasal potential difference.
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Affiliation(s)
- Louise C. Pyle
- Departments of Medicine, Pediatrics, Pharmacology, Genetics, and Physiology, and Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jennifer C. Fulton
- Departments of Medicine, Pediatrics, Pharmacology, Genetics, and Physiology, and Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Peter A. Sloane
- Departments of Medicine, Pediatrics, Pharmacology, Genetics, and Physiology, and Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Kyle Backer
- Departments of Medicine, Pediatrics, Pharmacology, Genetics, and Physiology, and Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Marina Mazur
- Departments of Medicine, Pediatrics, Pharmacology, Genetics, and Physiology, and Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jeevan Prasain
- Departments of Medicine, Pediatrics, Pharmacology, Genetics, and Physiology, and Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Stephen Barnes
- Departments of Medicine, Pediatrics, Pharmacology, Genetics, and Physiology, and Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - J. P. Clancy
- Departments of Medicine, Pediatrics, Pharmacology, Genetics, and Physiology, and Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Steven M. Rowe
- Departments of Medicine, Pediatrics, Pharmacology, Genetics, and Physiology, and Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
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Bruner RH, Greaves P, Hard GC, Regan KS, Ward JM, David RM. Histopathologic changes in the kidneys of male F344 rats from a 2-year inhalation carcinogenicity study of tetrahydrofuran: A pathology working group review and re-evaluation. Regul Toxicol Pharmacol 2010; 58:100-5. [DOI: 10.1016/j.yrtph.2010.04.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2010] [Revised: 04/23/2010] [Accepted: 04/28/2010] [Indexed: 01/09/2023]
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29
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Tamura T, Mitsumori K, Muto S, Kasahara H, Kobayashi S, Okuhara Y, Hayashi M, Nagasawa T, Onozato T, Kuroda J. Fifty-two week chronic toxicity of enzymatically decomposed rutin in Wistar rats. Food Chem Toxicol 2010; 48:2312-8. [DOI: 10.1016/j.fct.2010.05.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 04/30/2010] [Accepted: 05/24/2010] [Indexed: 10/19/2022]
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30
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Shimada Y, Dewa Y, Ichimura R, Suzuki T, Mizukami S, Hayashi SM, Shibutani M, Mitsumori K. Antioxidant enzymatically modified isoquercitrin suppresses the development of liver preneoplastic lesions in rats induced by β-naphthoflavone. Toxicology 2010; 268:213-8. [DOI: 10.1016/j.tox.2009.12.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Revised: 12/05/2009] [Accepted: 12/21/2009] [Indexed: 02/06/2023]
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31
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Wilson RT, Wang J, Chinchilli V, Richie JP, Virtamo J, Moore LE, Albanes D. Fish, vitamin D, and flavonoids in relation to renal cell cancer among smokers. Am J Epidemiol 2009; 170:717-29. [PMID: 19651663 DOI: 10.1093/aje/kwp178] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Fish, vitamin D, flavonoids, and flavonoid-containing foods may have cardiovascular benefits and therefore may also reduce the risk of renal cell cancer. Risk was prospectively assessed in the Alpha-Tocopherol Beta-Carotene Cancer Prevention Study (1985-2002) cohort (N = 27,111; 15.2 mean person-years of follow-up). At enrollment, demographic, health, and dietary history information was recorded. Individuals who smoked less than 5 cigarettes/day, with chronic renal insufficiency or prior cancer, were excluded. Hazard ratios and 95% confidence intervals from Cox regression were used to compare upper quartiles (quartiles 2-4) with the lowest quartile (quartile 1) of dietary intake. Among 228 cases, risk (quartile 4 vs. quartile 1) was associated with consumption of the flavonoid quercetin (hazard ratio = 0.6, 95% confidence interval: 0.4, 0.9; P(trend) = 0.015) and Baltic herring (hazard ratio = 2.0, 95% confidence interval: 1.4, 3.0; P(trend) < 0.001), with adjustment for age, body mass index, smoking, blood pressure, alcohol use, physical activity, urban residence, and education. In geographically stratified models, the risks associated with herring and total fish intake appeared to be highest in the urban coast region, although the interaction was not statistically significant. These results suggest that the flavonoid quercetin may prevent renal cell cancer among male smokers. The possible risk associated with fish intake warrants further investigation before conclusions may be drawn.
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Affiliation(s)
- Robin Taylor Wilson
- Epidemiology Division, Department of Public Health Sciences, Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033-0855, USA.
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Hard GC, Johnson KJ, Cohen SM. A comparison of rat chronic progressive nephropathy with human renal disease—implications for human risk assessment. Crit Rev Toxicol 2009; 39:332-46. [DOI: 10.1080/10408440802368642] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Utesch D, Feige K, Dasenbrock J, Broschard T, Harwood M, Danielewska-Nikiel B, Lines T. Evaluation of the potential in vivo genotoxicity of quercetin. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2008; 654:38-44. [DOI: 10.1016/j.mrgentox.2008.04.008] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2008] [Revised: 04/18/2008] [Accepted: 04/22/2008] [Indexed: 01/10/2023]
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Hard GC, Seely JC, Kissling GE, Betz LJ. Spontaneous occurrence of a distinctive renal tubule tumor phenotype in rat carcinogenicity studies conducted by the national toxicology program. Toxicol Pathol 2008; 36:388-96. [PMID: 18441261 DOI: 10.1177/0192623308315829] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The Toxicology Data Management System (TDMS) of the National Toxicology Program, National Institutes of Environmental Health Sciences, National Institutes of Health, was surveyed for occurrence and distribution of a distinctive renal tubule tumor type in rats. The hallmark features of this tumor included eosinophilic/amphophilic staining, large finely granular cells, and numerous vacuoles and/or minilumens. It is referred to here as the amphophilic-vacuolar (AV) variant of renal tubule tumor. Of 154 studies in which renal tubule tumors had been recorded in the standard single sections of kidney in the TDMS, there were collectively 1012 rats with renal adenomas, carcinomas, or adenocarcinomas, and of these, 100 displayed the distinctive AV morphology, representing 74 studies involving mostly the F344 rat, but also the Sprague-Dawley and Wistar strains. The AV tumors (mainly adenomas but also some carcinomas) occurred usually as solitary lesions in the affected animals. However, they were multiple and bilateral in a few cases. They were equally distributed between the sexes, did not metastasize (at least to the lung), and were not associated with chronic progressive nephropathy. The distribution of this renal tumor type was random across studies and dose groups, underscoring the likelihood that it was of spontaneous origin and not chemically induced. Accordingly, it is suggested that this distinctive renal tumor phenotype be recorded as a separate category from conventional RTT when assessing the carcinogenic potential of a test compound.
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Seely JC, Hard GC. Chronic Progressive Nephropathy (CPN) in the Rat: Review of Pathology and Relationship to Renal Tumorigenesis. J Toxicol Pathol 2008. [DOI: 10.1293/tox.21.199] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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36
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Varela-Barca FNT, Agnez-Lima LF, de Medeiros SRB. Base excision repair pathway is involved in the repair of lesions generated by flavonoid-enriched fractions of pepper tree (Schinus terebinthifolius, Raddi) stem bark. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2007; 48:672-81. [PMID: 17722088 DOI: 10.1002/em.20334] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Cell-free and bacterial assays indicate that flavonoid-enriched fractions and the flavonoids of pepper tree stem bark from Schinus terebinthifolius Raddi have genotoxic rather than antigenotoxic properties. In the present report, we have examined the ability of flavonoid-enriched fractions to damage plasmid DNA and the repair pathways involved in the recognition of these DNA lesions. High concentrations of two flavonoid-enriched fractions were able to break phosphodiester bonds in DNA. In addition, studies using bacterial strains deficient in nucleotide excision repair and base excision repair (BER) enzymes indicated that the flavonoid-enriched fractions generated lesions that were substrates for enzymes belonging to the BER pathway. In addition, in vitro studies indicated that the DNA damage produced by the flavonoid-enriched fractions was also a substrate for exonuclease III and that the phosphodiester breakage was amplified by copper ions. These results indicate that flavonoids from the pepper tree (Schinus terebinthifolius, Raddi) generate lesions on DNA that are potential targets of FPG and MutY glycosylase from the BER pathway. Chromatographic and spectral analyses helped to support the hypothesis that the flavonoids of the Brazilian pepper tree bark are the main factors involved in the fraction's damage potential. The isolated flavonoids from Fraction II were also tested in vitro and support the oxidative damage potential of these flavonoids.
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Affiliation(s)
- Francisco Napoleão Túlio Varela-Barca
- Departamento de Educação Física, Faculdade de Educação Física, Universidade do Estado do Rio Grande do Norte, Campus Universitário Central, Mossoró, Brazil
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Harwood M, Danielewska-Nikiel B, Borzelleca JF, Flamm GW, Williams GM, Lines TC. A critical review of the data related to the safety of quercetin and lack of evidence of in vivo toxicity, including lack of genotoxic/carcinogenic properties. Food Chem Toxicol 2007; 45:2179-205. [PMID: 17698276 DOI: 10.1016/j.fct.2007.05.015] [Citation(s) in RCA: 596] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2006] [Revised: 05/18/2007] [Accepted: 05/22/2007] [Indexed: 12/19/2022]
Abstract
Quercetin is a naturally-occurring flavonol (a member of the flavonoid family of compounds) that has a long history of consumption as part of the normal human diet. Because a number of biological properties of quercetin may be beneficial to human health, interest in the addition of this flavonol to various traditional food products has been increasing. Prior to the use of quercetin in food applications that would increase intake beyond that from naturally-occurring levels of the flavonol in the typical Western diet, its safety needs to be established or confirmed. This review provides a critical examination of the scientific literature associated with the safety of quercetin. Results of numerous genotoxicity and mutagenicity, short- and long-term animal, and human studies are reviewed in the context of quercetin exposure in vivo. To reconcile results of in vitro studies, which consistently demonstrated quercetin-related mutagenicity to the absence of carcinogenicity in vivo, the mechanisms that lead to the apparent in vitro mutagenicity, and those that ensure absence of quercetin toxicity in vivo are discussed. The weight of the available evidence supports the safety of quercetin for addition to food.
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Affiliation(s)
- M Harwood
- CANTOX Health Sciences International, 2233 Argentia Road, Suite 308, Mississauga, Ontario, Canada L5N 2X7.
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