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β-Carotene in the human body: metabolic bioactivation pathways - from digestion to tissue distribution and excretion. Proc Nutr Soc 2019; 78:68-87. [PMID: 30747092 DOI: 10.1017/s0029665118002641] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
β-Carotene intake and tissue/blood concentrations have been associated with reduced incidence of several chronic diseases. Further bioactive carotenoid-metabolites can modulate the expression of specific genes mainly via the nuclear hormone receptors: retinoic acid receptor- and retinoid X receptor-mediated signalling. To better understand the metabolic conversion of β-carotene, inter-individual differences regarding β-carotene bioavailability and bioactivity are key steps that determine its further metabolism and bioactivation and mediated signalling. Major carotenoid metabolites, the retinoids, can be stored as esters or further oxidised and excreted via phase 2 metabolism pathways. In this review, we aim to highlight the major critical control points that determine the fate of β-carotene in the human body, with a special emphasis on β-carotene oxygenase 1. The hypothesis that higher dietary β-carotene intake and serum level results in higher β-carotene-mediated signalling is partly questioned. Alternative autoregulatory mechanisms in β-carotene / retinoid-mediated signalling are highlighted to better predict and optimise nutritional strategies involving β-carotene-related health beneficial mediated effects.
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Kim YS, Gong X, Rubin LP, Choi SW, Kim Y. β-Carotene 15,15'-oxygenase inhibits cancer cell stemness and metastasis by regulating differentiation-related miRNAs in human neuroblastoma. J Nutr Biochem 2019; 69:31-43. [PMID: 31048207 DOI: 10.1016/j.jnutbio.2019.03.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 02/17/2019] [Accepted: 03/14/2019] [Indexed: 10/27/2022]
Abstract
Neuroblastoma (NB) is the most common pediatric malignancy and is considered to possess cancer stem cells (CSCs) properties which can drive tumor initiation and metastasis. β-carotene 15,15'-oxygenase (BCO1) is the main enzyme that catalyzes the first step in vitamin A biosynthesis from pro-vitamin A carotenoids. Retinoids (vitamin A) play a critical role in NB differentiation. However, the biological functions of BCO1 in NB remained to be elucidated. Here, we investigated the effects of BCO1 on NB CSCs with stably expressing BCO1 in NB cells. We show that BCO1 significantly suppressed self-renewal and markers of NB CSCs. Moreover, BCO1 inhibited the metastatic potential of NB cells and suppressed the enzymatic activity and expression of MMPs, as well as expression of HIF-1α and its downstream targets. In vivo, BCO1 reduced the metastatic incidence and volumes of metastatic tumors and downregulated the expression of CSCs markers, MMPs, and HIF-1α in tumor tissues of a mouse xenograft model. A possible mechanism underlying the anti-cancer activities of BCO1 is proposed based on miRNAs sequencing array data which suggests a role for BCO1 in regulating miRNAs associated with neuronal differentiation, cell-cell adhesion, and the Wnt signaling pathway. Thus, our results demonstrate new chemotherapeutic roles for BCO1 in malignant NB that mediate suppression of cancer stemness and metastasis.
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Affiliation(s)
- Yoo Sun Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, South Korea
| | - Xiaoming Gong
- Department of Pediatrics, Texas Tech University Health Sciences Center, Paul L. Foster School of Medicine, El Paso, TX, USA
| | - Lewis P Rubin
- Georgetown University Medical Center, Washington, DC, USA
| | - Sang-Woon Choi
- Chaum Life Center CHA University, Seoul 06062, South Korea
| | - Yuri Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, South Korea.
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Yu D, Zhang R, Wang Y, Zou D, Li T, Tang H, Jiang L, Wang L. Purification of β-carotene 15,15′-monooxygenase from pig intestine and its enzymatic hydrolysis of pigment in soybean oil. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.13960] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dianyu Yu
- College of Food Science and Technology; Northeast Agricultural University; Harbin 150030 China
| | - Ruchun Zhang
- College of Food Science and Technology; Northeast Agricultural University; Harbin 150030 China
| | - Yuqi Wang
- College of Food Science and Technology; Northeast Agricultural University; Harbin 150030 China
| | - Dezhi Zou
- College of Food Science and Technology; Northeast Agricultural University; Harbin 150030 China
| | - Tingting Li
- College of Food Science and Technology; Northeast Agricultural University; Harbin 150030 China
| | - Honglin Tang
- College of Food Science and Technology; Northeast Agricultural University; Harbin 150030 China
| | - Lianzhou Jiang
- College of Food Science and Technology; Northeast Agricultural University; Harbin 150030 China
| | - Liqi Wang
- School of Computer and Information Engineering; Harbin University of Commerce; Harbin 150028 China
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He F, Xiao RD, Lin T, Xiong WM, Xu QP, Li X, Liu ZQ, He BC, Hu ZJ, Cai L. Dietary patterns, BCMO1 polymorphisms, and primary lung cancer risk in a Han Chinese population: a case-control study in Southeast China. BMC Cancer 2018; 18:445. [PMID: 29673335 PMCID: PMC5909209 DOI: 10.1186/s12885-018-4361-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 04/11/2018] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND We investigated whether BCMO1 variants and dietary patterns are associated with lung cancer risk. METHODS Case-control study including 1166 lung cancer cases and 1179 frequency matched controls was conducted for three BCMO1 variants (rs6564851, rs12934922, and rs7501331) and four dietary patterns were investigated. Logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (95% CIs). RESULTS The rs6564851, rs12934922, and rs7501331 were not found to be associated with lung cancer risk (P > 0.05). In multivariable-adjusted models, compared to the lowest quartile of the score on the "fruits and vegetables" pattern, the highest quintile was associated with a 78.4% decreased risk (OR Q4 vs. Q1 = 0.216; 95% CI, 0.164-0.284; P for trend < 0.001). Other patterns were not found the association. The "fruits and vegetables" pattern was associated with a reduced risk of lung cancer with all 3 SNPs irrespective of genotypes (all P for trend< 0.001). The association for the "Frugal" pattern was associated with increased risk of lung cancer among smokers (P for interaction = 0.005). The protective effects of the "cereals/wheat and meat" pattern was more evident for squamous cell carcinoma and other histological type. CONCLUSIONS We did not observe associations of BCMO1 variants and lung cancer. Diets rich in fruits and vegetables may be protective against lung cancer.
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Affiliation(s)
- Fei He
- Department of Epidemiology, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Ren-Dong Xiao
- Department of Thoracic Surgery, The first affiliated hospital of Fujian Medical University, Fuzhou, 350005, China
| | - Tao Lin
- Department of Epidemiology, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Wei-Min Xiong
- Department of Epidemiology, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Qiu-Ping Xu
- Department of Epidemiology, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Xu Li
- Department of Thoracic Surgery, The first affiliated hospital of Fujian Medical University, Fuzhou, 350005, China
| | - Zhi-Qiang Liu
- Department of Epidemiology, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Bao-Chang He
- Department of Epidemiology, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Zhi-Jian Hu
- Department of Epidemiology, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Lin Cai
- Department of Epidemiology, School of Public Health, Fujian Medical University, Fuzhou, 350108, China. .,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China.
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Gong X, Marisiddaiah R, Rubin LP. Inhibition of pulmonary β-carotene 15, 15'-oxygenase expression by glucocorticoid involves PPARα. PLoS One 2017; 12:e0181466. [PMID: 28732066 PMCID: PMC5521778 DOI: 10.1371/journal.pone.0181466] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 06/30/2017] [Indexed: 01/19/2023] Open
Abstract
β-carotene 15,15'-oxygenase (BCO1) catalyzes the first step in the conversion of dietary provitamin A carotenoids to vitamin A. This enzyme is expressed in a variety of developing and adult tissues, suggesting that its activity may regulate local retinoid synthesis. Vitamin A and related compounds (retinoids) are critical regulators of lung epithelial development, integrity, and injury repair. A balance between the actions of retinoids and glucocorticoids (GCs) promotes normal lung development and, in particular, alveolarization. Alterations in this balance, including vitamin A deficiency and GC excess, contribute to the development of chronic lung disorders. Consequently, we investigated if GCs counteract retinoid effects in alveolar epithelial cells by mechanisms involving BCO1-dependent local vitamin A metabolism. We demonstrate that BCO1 is expressed in human fetal lung tissue and human alveolar epithelial-like A549 cells. Our results indicate A549 cells metabolize β-carotene to retinal and retinoic acid (RA). GCs exposure using dexamethasone (DEX) decreases BCO1 mRNA and protein levels in A549 cells and reduces BCO1 promoter activity via inhibiting peroxisome proliferator-activated receptor γ (PPARγ) DNA binding. DEX also induces expression of PPARα, which in turn most likely causes a decrease in PPARγ/RXRα heterodimer binding to the bco1 gene promoter and consequent inhibition of bco1 gene expression. PPARα knockdown with siRNA abolishes DEX-induced suppression of BCO1 expression, confirming the requirement for PPARα in this DEX-mediated BCO1 mechanism. Taken together, these findings provide the first evidence that GCs regulate vitamin A (retinoid) signaling via inhibition of bco1 gene expression in a PPARα-dependent manner. These results explicate novel aspects of local GC:retinoid interactions that may contribute to alveolar tissue remodeling in chronic lung diseases that affect children and, possibly, adults.
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Affiliation(s)
- Xiaoming Gong
- Department of Pediatrics, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, Texas, United States of America
- * E-mail: (XG); (LPR)
| | - Raju Marisiddaiah
- All Children’s Research Institute, St. Petersburg, Florida, United States of America
| | - Lewis P. Rubin
- Department of Pediatrics, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, Texas, United States of America
- Department of Biomedical Sciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, Texas, United States of America
- * E-mail: (XG); (LPR)
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Gong X, Marisiddaiah R, Zaripheh S, Wiener D, Rubin LP. Mitochondrial β-Carotene 9',10' Oxygenase Modulates Prostate Cancer Growth via NF-κB Inhibition: A Lycopene-Independent Function. Mol Cancer Res 2016; 14:966-975. [PMID: 27406826 DOI: 10.1158/1541-7786.mcr-16-0075] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 06/27/2016] [Indexed: 11/16/2022]
Abstract
Despite numerous inquiries into protective roles of lycopene in prostate cancer prevention or therapy, little is known about mechanisms by which lycopene or its metabolites inhibit prostate cancer. The enzyme β-carotene 9',10'-oxygenase (BCO2), which catalyzes asymmetric cleavage of several carotenoids, is the principal regulator of lycopene metabolism, but the range of BCO2 biological functions is incompletely understood. This study investigated expression and functional roles of BCO2 in human prostate cancer. Expression of the bco2 gene is dramatically decreased in prostate cancer tissue and in a range of prostate cancer cell lines as compared with nonneoplastic prostate tissue and normal prostatic epithelial cells, respectively. Inhibition of DNA methyltransferase activity restored bco2 expression in prostate cancer cell lines tested. Treatment with lycopene or its metabolite, apo-10-lycopenal, also increased bco2 expression and reduced cell proliferation in androgen-sensitive cell lines, but lycopene neither altered bco2 expression nor cell growth in androgen-resistant cells. Notably, restoring bco2 expression in prostate cancer cells inhibited cell proliferation and colony formation, irrespective of lycopene exposure. Exogenous expression of either wild-type BCO2 or a mutant (enzymatically inactive) BCO2 in prostate cancer cells reduced NF-κB activity and decreased NF-κB nuclear translocation and DNA binding. Together, these results indicate epigenetic loss of BCO2 expression is associated with prostate cancer progression. Moreover, these findings describe previously unanticipated functions of BCO2 that are independent of its enzymatic role in lycopene metabolism. IMPLICATIONS This study identifies BCO2 as a tumor suppressor in prostate cancer. BCO2-mediated inhibition of NF-κB signaling implies BCO2 status is important in prostate cancer progression. Mol Cancer Res; 14(10); 966-75. ©2016 AACR.
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Affiliation(s)
- Xiaoming Gong
- Department of Pediatrics, Texas Tech University Health Sciences Center, Paul L. Foster School of Medicine, El Paso, Texas
| | | | - Susan Zaripheh
- Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio
| | | | - Lewis P Rubin
- Department of Pediatrics, Texas Tech University Health Sciences Center, Paul L. Foster School of Medicine, El Paso, Texas. Department of Biomedical Sciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, Texas.
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