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Zhuang P, Chen X, Sun S, Li Y, Mo H. Bioaccessibility and bioavailability of Pb and Cd in rice is affected by propolis and its extracts and Fe intervention. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 951:175697. [PMID: 39182785 DOI: 10.1016/j.scitotenv.2024.175697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 08/09/2024] [Accepted: 08/20/2024] [Indexed: 08/27/2024]
Abstract
Increasing the intake of dietary supplements containing antioxidant components can reduce the oral bioavailability of lead (Pb) and cadmium (Cd) and benefit human health. In this study, the effects of propolis and its extracts (kaempferol (KAE), quercetin (QR), and caffeic acid phenethyl ester (CAPE)) in conjunction with proanthocyanidins (PA) on Pb and Cd bioaccessibility (BAC) and the relative bioavailability (RBA) in brown and polished rice are investigated. The results of in vitro tests showed that propolis and its extracts were effective in reducing Pb BAC in both brown and polished rice. A medium dose of PA had a significant reduction effect on Cd BAC (76 %) and RBA in both brown and polished rice. Based on mouse bioassays, the supplementation of propolis and its extracts significantly (p < 0.05) reduced the Pb-RBA in brown rice, resulting in a decrease in Pb RBA from 25 % in the control group to 16.5-17.6 %. The results showed that the BAC and RBA of Pb in brown rice with dietary supplements decreased significantly, which may be related to the enhanced inhibitory effect of high Fe. It was also found that the Pb RBA was negatively correlated with the Fe content in mice kidneys. This result provided evidence that antioxidants better inhibit the bioavailability of heavy metals, highlighting that propolis and PA may be alternative dietary supplements for intervening in human Pb and Cd exposure.
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Affiliation(s)
- Ping Zhuang
- Guangdong Provincial Key Laboratory of Applied Botany, Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China; South China National Botanical Garden, Guangzhou 510650, PR China.
| | - Xianghua Chen
- Guangdong Provincial Key Laboratory of Applied Botany, Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuo Sun
- Guangdong Provincial Key Laboratory of Applied Botany, Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yingwen Li
- Guangdong Provincial Key Laboratory of Applied Botany, Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China; South China National Botanical Garden, Guangzhou 510650, PR China
| | - Hui Mo
- Guangdong Provincial Key Laboratory of Applied Botany, Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China; South China National Botanical Garden, Guangzhou 510650, PR China
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Lockwood TE, Banati RB, Nikagolla C, Violi JP, Bishop DP. Concentration and Distribution of Toxic and Essential Elements in Traditional Rice Varieties of Sri Lanka Grown on an Anuradhapura District Farm. Biol Trace Elem Res 2024; 202:2891-2899. [PMID: 37725314 PMCID: PMC11052878 DOI: 10.1007/s12011-023-03847-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/05/2023] [Indexed: 09/21/2023]
Abstract
Toxic heavy metals have been the focus of many investigations into chronic kidney disease of unknown aetiology (CKDu) within Sri Lanka. It has been hypothesised that exposure to nephrotoxic arsenic, cadmium and lead could play a role in the development of CKDu, and these metals have previously been found in unsafe concentrations in Sri Lankan rice. Traditional varieties of Sri Lankan rice remain popular due to their perceived health benefits, but their uptake of trace and toxic heavy metals remained unexplored. Here, we report a one-time, cross-sectional dataset on the concentrations of essential and toxic elements present in eleven samples of polished and unpolished traditional rice varieties, all regularly grown and sold in the Anuradhapura district, a CKDu hotspot. All rice was sourced from the same farm, with the exception of one store bought sample grown on another, unidentified farm. Cadmium concentrations varied significantly between varieties, and potentially unsafe concentrations of cadmium were detected in the store-bought sample (Suwadel, 113±13 μg kg-1). Elemental imaging of the grains revealed lead to be stored mainly in the rice bran, which is removed during polishing, while cadmium was distributed in the edible portion of the grain. Essential elements were generally higher in the traditional rice varieties than those reported for non-traditional varieties and are a potential source of trace elements for nutrient-deficient communities. The concentration of selenium, an element that plays a protective role in the kidneys, was too low to provide the minimum recommended intake. The methods developed in this study could be applied to a more comprehensive study of elemental uptake of rice under controlled growing conditions.
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Affiliation(s)
- Thomas E Lockwood
- Hyphenated Mass Spectrometry Laboratory (HyMaS), Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Richard B Banati
- Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW, 2234, Australia
- Faculty of Medicine and Health, University of Sydney, Camperdown, NSW, 2006, Australia
| | - Chandima Nikagolla
- Faculty of Engineering, School of Civil and Environmental Engineering, Queensland University of Technology, QLD, Brisbane, 4000, Australia
| | - Jake P Violi
- School of Chemistry, University of New South Wales, Kensington, NSW, 2052, Australia
| | - David P Bishop
- Hyphenated Mass Spectrometry Laboratory (HyMaS), Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
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Ma J, Yin N, Wang P, Cai X, Geng Z, Fan C, Cui Y, Sjödin A. Bioaccessibility assessment of arsenic and cadmium in polished and unpolished rice: Comparison of three in vitro methods. Food Res Int 2024; 177:113853. [PMID: 38225128 DOI: 10.1016/j.foodres.2023.113853] [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: 10/24/2023] [Revised: 12/09/2023] [Accepted: 12/14/2023] [Indexed: 01/17/2024]
Abstract
INFOGEST is a standardized in vitro digestion method suitable for foods, but rarely used to study the bioaccessibility of heavy metals in food. This study aimed to explore the differences between INFOGEST and the extensively used Physiologically Based Extraction Test (PBET) and Unified Bioaccessibility Research Group of Europe Method (UBM) methods for determining the bioaccessibility of As and Cd in rice. Intestinal As (79.3 ± 8.5 %, 75.8 ± 12.7 %, and 72.3 ± 12.2 % for INFOGEST, PBET, and UBM, respectively) and Cd (47.0 ± 6.4 %, 40.7 ± 13.8 %, and 38.1 ± 15.7 % for INFOGEST, PBET, and UBM, respectively) bioaccessibilities in the rice samples determined by the three methods were generally similar (p > 0.1, except for As bioaccessibility between INFOGEST and UBM). Furthermore, PBET was significantly correlated with INFOGEST for As bioaccessibility (R2 = 0.416) and with UBM for Cd bioaccessibility (R2 = 0.879). Additionally, PBET indicated that the bioaccessibilities of As and Cd in the polished rice were 17.0 % and 19.8 % higher, respectively, than that in the unpolished rice. This study highlights the influence of in vitro methods and rice matrices on heavy metal bioaccessibility values, necessitating a more accurate assessment of health risks associated with rice consumption.
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Affiliation(s)
- Jingnan Ma
- Sino-Danish College, University of Chinese Academy of Sciences, Beijing 101408, China.
| | - Naiyi Yin
- Sino-Danish College, University of Chinese Academy of Sciences, Beijing 101408, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Pengfei Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Xiaolin Cai
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Ziqi Geng
- Sino-Danish College, University of Chinese Academy of Sciences, Beijing 101408, China.
| | - Chuanfang Fan
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Yanshan Cui
- Sino-Danish College, University of Chinese Academy of Sciences, Beijing 101408, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Anders Sjödin
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg, Denmark.
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Yang S, Zhou Q, Sun L, Sun Y, Qin Q, Song K, Zhu Z, Liu X, Xue Y. A prospective health risks analysis of regulatory limits for heavy metals in rice from representative organizations and countries worldwide: Are they protective? THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:167130. [PMID: 37751841 DOI: 10.1016/j.scitotenv.2023.167130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 09/10/2023] [Accepted: 09/14/2023] [Indexed: 09/28/2023]
Abstract
Heavy metals contamination in rice has been one of the most public concerns globally; thus, many countries and organizations issued the maximum acceptable limits (MALs) of their concentrations in rice to regulate food safety and health risks. However, the applicability of these MALs has rarely been thoroughly evaluated. This study collected the MALs of heavy metals for rice from representative countries and organizations around the world. We assessed the critical health risks in the case of metal concentrations that reached the MALs for the first time. Results showed great variability of rice regulation limits owing to different processing methods (paddy, polished, and brown rice) and metal types (mainly focusing on inorganic As, Cd, and Pb). Risk analysis revealed that the inorganic As limits and part of Cd limits for polished rice generated relatively high health risks, indicating that their risks may be underestimated. Monte Carlo simulation further showed that the daily intake rate of rice (IRrice) is the largest contributor to total variances for the derivation of MALs, and regulation limits decreased with the augment of IRrice. Overall, we suggest a cautious reduction in the allowable limits of certain metals (such as inorganic As and part of Cd) in rice as their health risks and toxicity may be underestimated.
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Affiliation(s)
- Shiyan Yang
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Qianhang Zhou
- School of Chemistry and Environmental Engineering, Shanghai Institute of Technology, 201418, China
| | - Lijuan Sun
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Yafei Sun
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Qin Qin
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Ke Song
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Zhengyi Zhu
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China
| | - Xingmei Liu
- College of Environmental & Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Yong Xue
- Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, 201403, China.
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