1
|
Nisar N, Ajmal M, Hanif NQ, Hassan SW. Phytochemicals analysis and aflatoxin B 1 detoxification potential of leaves extract of Moringa oleifera and Calotropis procera. Nat Prod Res 2024:1-9. [PMID: 38625875 DOI: 10.1080/14786419.2024.2342003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 04/03/2024] [Indexed: 04/18/2024]
Abstract
The present study aimed to identify the presence of certain classes of phytochemicals in the leaf extract of medicinal herbs viz. Moringa oleifera and Calotropis procera, using qualitative detection tests and explored the potential of aqueous and ethanolic extract to inhibit aflatoxin production by thin layer chromatography at 25 °C and pH (7) of different incubation times i.e. 0-, 1-, 3-, 6- and 24-h. Qualitative phytochemical analysis reported that the aqueous leave extracts of M. oleifera and C. procera contained tannins, phlobatannins, quinones, steroids, sugar, betacyanins, fatty acids, phenols, and volatile oils. Aflatoxin analysis reported that the ethanolic extract of M. oleifera was found more effective than detoxifying 100% of AFB1 after 24 h of incubation. In the case of C. procera, the aqueous extract reduced 96.5% of AFB1 and ethanolic extract reduced 96% of AFB1 after 24-h of incubation. The results revealed that natural plant products have a high potential to reduce AFB1 and could contribute to mitigation plans for AFB1. There is a need for further characterisation using techniques such as GC-MS, LC-MS, or NMR which would provide valuable information on the chemical composition of the extracts.
Collapse
Affiliation(s)
- Nehrish Nisar
- Center of Integrative Conservation Macroevolution Group, Xishuangbanna Tropical Botanical Garden, UCAS, Mengla, China
| | - Maryam Ajmal
- Faculty of Sciences, Department of Botany, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
| | - Nafeesa Qudsia Hanif
- University Institute of Biochemistry and Biotechnology (UIBB), Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
| | | |
Collapse
|
2
|
Zhong Y, Lu H, Lu X, He Z, Jiang Y, Chen J, Liabsuetrakul T. Correlations of Aflatoxin Exposure from Cooking Oil and Dietary Foods During Pregnancy with Birth Weight and Gestational Age at Birth in Guangxi, China. Int J Gen Med 2024; 17:1171-1184. [PMID: 38562209 PMCID: PMC10982453 DOI: 10.2147/ijgm.s453839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 03/02/2024] [Indexed: 04/04/2024] Open
Abstract
Background Cooking oil and dietary foods are easily contaminated by aflatoxins (AFs) in Guangxi, China where low birth weight and preterm birth were prevalent. However, there are no data on AF exposure in pregnant women or their impact on newborn birth outcomes. This study aims to measure the levels and correlations of AFs in cooking oil, estimated dietary intake (EDI) of AFs in dietary foods, and serum AFB1 albumin adducts (AFB1-alb) with newborn birthweight and gestational age at birth. Methods A prospective study was conducted among 126 pregnant women in Guangxi, China. All recruited women were interviewed for demographic data and behavior and obstetric information and then followed up until giving birth. AF measurements were obtained from cooking oil, dietary foods, maternal serum, and cord blood and the correlations of AF levels with newborn birthweight and gestational age at birth were tested using correlation analysis. Results The median EDI of AFs in cooking oil was 2.61 ng/kg.bw/day and in dietary foods 2.95 ng/kg.bw/day. High positive correlations among EDI of aflatoxin B1 (AFB1) from cooking oil and dietary foods were found (r > 0.7). Low positive correlations of AFB1-alb in maternal serum and cord blood and both EDI of AFB1 in both cooking oil and dietary foods were shown (r ≈0.3). Significant correlations between AF levels in both cooking oil and dietary foods with birth weight were found, but very low negative correlations (r = - 0.244 ~ -0.285). AFB1 levels in foods, maternal serum and cord blood levels were high in pregnant women with newborn low birth weight and preterm birth. Conclusion The EDIs of AFB1 from both cooking oil and dietary foods were significantly correlated with AFB1-alb in maternal serum and cord blood. Negative correlations of AFs from cooking oils and foods with newborn birth weight should be paid more attention.
Collapse
Affiliation(s)
- Yanxu Zhong
- Food Safety Monitoring and Evaluation Department, Guangxi Zhuang Autonomous Region Centre for Disease Control and Prevention, Nanning, Guangxi Region, 530000, People’s Republic of China
- Department of Epidemiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Huan Lu
- Infectious Diseases Department, the Fourth People’s Hospital of Nanning, Nanning, Guangxi Region, 530000, People’s Republic of China
| | - Xiaodan Lu
- Food Safety and Health Research Center, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, People’s Republic of China
| | - Zhini He
- Food Safety and Health Research Center, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, People’s Republic of China
| | - Yuyan Jiang
- Food Safety Monitoring and Evaluation Department, Guangxi Zhuang Autonomous Region Centre for Disease Control and Prevention, Nanning, Guangxi Region, 530000, People’s Republic of China
| | - Jie Chen
- Food Safety Monitoring and Evaluation Department, Guangxi Zhuang Autonomous Region Centre for Disease Control and Prevention, Nanning, Guangxi Region, 530000, People’s Republic of China
| | - Tippawan Liabsuetrakul
- Department of Epidemiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| |
Collapse
|
3
|
Hassen JY, Debella A, Eyeberu A, Mussa I. Level of exposure to aflatoxins during pregnancy and its association with adverse birth outcomes in Africa: a meta-analysis. Int Health 2024:ihae015. [PMID: 38339961 DOI: 10.1093/inthealth/ihae015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 12/28/2023] [Accepted: 01/18/2024] [Indexed: 02/12/2024] Open
Abstract
BACKGROUND Aflatoxins are various poisonous carcinogens and mutagens produced by Aspergillus species. Exposure to aflatoxins during pregnancy results in adverse birth outcomes. This meta-analysis was carried out to determine the estimates of how much aflatoxin is harmful to the pregnancy and its outcome, including birthweight, birth length, low birthweight (LBW), small for gestational age (SGA), stunting, poverty, food insecurity, income, pesticides and stillbirth, in an African context. METHODS Both published and unpublished studies in Africa were searched on MEDLINE, PubMed, Embase, SCOPUS, Web of Science and Google Scholar. Stata version 18.2 software was used for cleaning and analysis. The prevalence with a 95% confidence interval (CI) was estimated using the random effects model and a forest plot was used to present the findings. In addition, the heterogeneity of the study was assessed using Cochrane I2 statistics and publication bias was assessed using Egger's intercept and funnel plot. RESULTS This review included 28 studies with a total of 6283 pregnant women and newborns. The analysis showed the overall level of exposure to aflatoxins was 64% (95% CI 48 to 78, τ2=0.66, I2=99.34%, p=0.001). In the subgroup analysis by publication year, the highest level of exposure to aflatoxins (82% [95% CI 69 to 92]) was observed among studies published from 2020 to 2023. This study also found that exposure to aflatoxins during pregnancy had an association with prematurity, LBW, SGA and stillbirth. CONCLUSIONS The data analysed in this study indicated that three of every five pregnant women had exposure to aflatoxins in Africa. Moreover, pregnant women exposed to aflatoxins had a higher likelihood of having a LBW and SGA newborn. Thus governments and all stakeholders should initiate policies that mitigate the toxicity of aflatoxins in pregnant women, foetuses and newborns.
Collapse
Affiliation(s)
- Jemal Y Hassen
- School of Rural Development and Agricultural Innovation, Haramaya University, Dire Dawa, Ethiopia
| | - Adera Debella
- School of Nursing and Midwifery, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia
| | - Addis Eyeberu
- School of Nursing and Midwifery, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia
| | - Ibsa Mussa
- School of Public Health, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia
| |
Collapse
|
4
|
Tania A, Akram A, Hanif NQ, Ajmal M, Seerat W, Nijabat A, Mehak A. Proximate composition, fungal isolation and contamination of aflatoxin B 1 in chickpea seeds from the Punjab, Pakistan. Nat Prod Res 2023; 37:3314-3322. [PMID: 35428423 DOI: 10.1080/14786419.2022.2065674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 10/18/2022]
Abstract
Chickpea, Cicer arietinum L., is a nutrient rich crop that is widely cultivated and consumed in Pakistan. However, chickpea is highly prone to fungal growth leading to contamination with aflatoxins, the most potent carcinogen found in nature. In this study, fifty chickpea seed samples were collected from the local markets of the Punjab, Pakistan, to evaluate their nutritional quality, fungal and AFB1 contamination. Proximate analysis suggested that chickpea seeds contained 5.5-6.93% moisture, 62.24-63.24% carbohydrates, 22.75-23.44% protein, 4.99-5.4% fat, 5.62-5.84% fiber and 2.92-3.16% ash. Morphological identification techniques revealed fourteen fungal species belonging to six fungal genera from which Aspergillus flavus was the leading contaminant. AFB1 analysis revealed that sixty-two percent samples were contaminated with AFB1. All the AFB1 positive samples contained AFB1 level more than 2 ppb and 12.9% samples contain AFB1 level more than 20 ppb, exceeded the maximum limit (ML) assigned by EU and USA (FDA & FAO) respectively. The results of the present studies reported that chickpea is a highly contaminated commodity in terms of fungi and AFB1 that's why further investigations and monitoring are required to reduce the fungal and AFB1 contamination. These baseline data are an initial step in the effort to deal with this significant food safety issue.
Collapse
Affiliation(s)
- Ayesha Tania
- Department of Botany, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Punjab, Pakistan
| | - Abida Akram
- Department of Botany, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Punjab, Pakistan
| | | | - Maryam Ajmal
- Department of Botany, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Punjab, Pakistan
| | - Wajiha Seerat
- Department of Botany, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Punjab, Pakistan
| | - Aneela Nijabat
- Department of Botany, Ghazi University, Dera Ghazi Khan, Pakistan
| | - Asma Mehak
- Department of Botany, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Punjab, Pakistan
| |
Collapse
|
5
|
Kościelecka K, Kuć A, Kubik-Machura D, Męcik-Kronenberg T, Włodarek J, Radko L. Endocrine Effect of Some Mycotoxins on Humans: A Clinical Review of the Ways to Mitigate the Action of Mycotoxins. Toxins (Basel) 2023; 15:515. [PMID: 37755941 PMCID: PMC10535190 DOI: 10.3390/toxins15090515] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/10/2023] [Accepted: 08/22/2023] [Indexed: 09/28/2023] Open
Abstract
Fungi such as Aspergillus spp. and Fusarium spp., which are commonly found in the environment, pose a serious global health problem. This study aims to present the results of epidemiological studies, including clinical cases, on the relationship between human exposure to some mycotoxins, especially zearalenone and aflatoxin, and the occurrence of reproductive disorders. In addition, examples of methods to reduce human exposure to mycotoxins are presented. In March 2023, various databases (PubMed, Google Scholar, EMBASE and Web of Science) were systematically searched using Google Chrome to identify studies evaluating the association between exposure to mycotoxins and the occurrence of complications related to impaired fertility or cancer incidence. The analysed data indicate that exposure to the evaluated mycotoxins is widespread and correlates strongly with precocious puberty, reduced fertility and increased cancer incidence in women and men worldwide. There is evidence to suggest that exposure to the Aspergillus mycotoxin aflatoxin (AF) during pregnancy can impair intrauterine foetal growth, promote neonatal jaundice and cause perinatal death and preterm birth. In contrast, exposure to the Fusarium mycotoxin zearalenone (ZEA) leads to precocious sexual development, infertility, the development of malformations and the development of breast cancer. Unfortunately, the development of methods (biological, chemical or physical) to completely eliminate exposure to mycotoxins has limited practical application. The threat to human health from mycotoxins is real and further research is needed to improve our knowledge and specific public health interventions.
Collapse
Affiliation(s)
- Klaudia Kościelecka
- Department of Pathomorphology, Faculty of Medical Sciences in Zabrze, 3 Maja St. 13, 41-800 Zabrze, Poland; (K.K.); (A.K.); (D.K.-M.)
| | - Aleksandra Kuć
- Department of Pathomorphology, Faculty of Medical Sciences in Zabrze, 3 Maja St. 13, 41-800 Zabrze, Poland; (K.K.); (A.K.); (D.K.-M.)
| | - Daria Kubik-Machura
- Department of Pathomorphology, Faculty of Medical Sciences in Zabrze, 3 Maja St. 13, 41-800 Zabrze, Poland; (K.K.); (A.K.); (D.K.-M.)
| | - Tomasz Męcik-Kronenberg
- Department of Pathomorphology, Faculty of Medical Sciences in Zabrze, 3 Maja St. 13, 41-800 Zabrze, Poland; (K.K.); (A.K.); (D.K.-M.)
| | - Jan Włodarek
- Department of Preclinical Sciences and Infectious Diseases, Faculty of Veterinary Medicine and Animal Sciences, Poznan University of Life Sciences, Wolynska St. 35, 60-637 Poznan, Poland;
| | - Lidia Radko
- Department of Preclinical Sciences and Infectious Diseases, Faculty of Veterinary Medicine and Animal Sciences, Poznan University of Life Sciences, Wolynska St. 35, 60-637 Poznan, Poland;
| |
Collapse
|
6
|
Matchado A, Smith JW, Schulze KJ, Groopman JD, Kortekangas E, Chaima D, Arnold CD, Maleta K, Ashorn U, Ashorn P, Dewey KG, Stewart CP. Child Aflatoxin Exposure is Associated with Poor Child Growth Outcomes: A Prospective Cohort Study in Rural Malawi. Curr Dev Nutr 2023; 7:101962. [PMID: 37426291 PMCID: PMC10328803 DOI: 10.1016/j.cdnut.2023.101962] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 05/19/2023] [Accepted: 06/07/2023] [Indexed: 07/11/2023] Open
Abstract
Background Aflatoxin (AF) exposure is associated with child growth faltering in cross-sectional studies, with limited findings from longitudinal studies. Objectives To evaluate the relationship between maternal AF B1-lysine adduct concentration, child AF B1-lysine adduct concentration, and child growth in the first 30 mo of life. Methods AF B1-lysine adduct was measured in mother-child dyad plasma samples using isotope dilution mass spectrometry. Using linear regression, we assessed the relationship between AF B1-lysine adduct concentration and child weight, height, and head and mid-upper arm circumferences at 1 wk, 6, 12, 18, 24, and 30 mo of age. Results In adjusted models, maternal prenatal AF B1-lysine adduct (pg/μL) was positively associated with newborn anthropometric outcomes; largest beta coefficients for associations between standardized values were for newborn weight-for-age z-score [β = 0.13; 95% confidence interval (CI): 0.02, 0.24; P < 0.05 and β = 0.11; 95% CI: 0.00, 0.22; P < 0.05 for second and third trimester AF, respectively]. Child AF B1-lysine adduct (pg/μL) at 6 mo was negatively associated with head circumference-for-age z-score at 6, 18, 24, and 30 mo, with beta coefficients ranging from β = -0.15; 95% CI: -0.28, -0.02 to β = -0.17; 95% CI: -0.31, -0.03; P < 0.05); 18-mo AF was negatively associated with anthropometric outcomes at 18, 24, and 30 mo, most consistently with length-for-age z-score (β = -0.18; 95% CI: -0.32, -0.04, β = -0.21; 95% CI: -0.35, -0.07, β = -0.18; 95% CI: -0.32, -0.03 at 18, 24 and 30 mo, respectively). Conclusions Child AF exposure was associated with impaired child growth, but maternal AF exposure was not. Exposure during infancy was linked to persistent deficit in head circumference, implying reduced brain size lasting beyond the age of 2 years. Exposure at 18 mo was linked to persistent linear growth deficit. Further research should elucidate mechanisms through which AF affects child growth.
Collapse
Affiliation(s)
- Andrew Matchado
- School of Global and Public Health, Kamuzu University of Health Sciences, Blantyre, Malawi
- Department of Nutrition, Institute for Global Nutrition, University of California, Davis, CA, United States
| | - Joshua W. Smith
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States
| | - Kerry J. Schulze
- Department of International Health, Center for Human Nutrition, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States
| | - John D. Groopman
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States
| | - Emma Kortekangas
- Center for Child, Adolescent, and Maternal Health Research, Tampere University and Tampere University Hospital, Tampere, Finland
| | - David Chaima
- School of Global and Public Health, Kamuzu University of Health Sciences, Blantyre, Malawi
| | - Charles D. Arnold
- Department of Nutrition, Institute for Global Nutrition, University of California, Davis, CA, United States
| | - Kenneth Maleta
- School of Global and Public Health, Kamuzu University of Health Sciences, Blantyre, Malawi
| | - Ulla Ashorn
- Center for Child, Adolescent, and Maternal Health Research, Tampere University and Tampere University Hospital, Tampere, Finland
| | - Per Ashorn
- Center for Child, Adolescent, and Maternal Health Research, Tampere University and Tampere University Hospital, Tampere, Finland
- Department of Paediatrics, Tampere University Hospital, Tampere, Finland
| | - Kathryn G. Dewey
- Department of Nutrition, Institute for Global Nutrition, University of California, Davis, CA, United States
| | - Christine P. Stewart
- Department of Nutrition, Institute for Global Nutrition, University of California, Davis, CA, United States
| |
Collapse
|
7
|
He XN, Wu P, Jiang WD, Liu Y, Kuang SY, Tang L, Ren HM, Li H, Feng L, Zhou XQ. Aflatoxin B1 exposure induced developmental toxicity and inhibited muscle development in zebrafish embryos and larvae. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 878:163170. [PMID: 37003331 DOI: 10.1016/j.scitotenv.2023.163170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/02/2023] [Accepted: 03/26/2023] [Indexed: 05/13/2023]
Abstract
The prevalence of aflatoxin B1 (AFB1), one of the most toxic mycotoxins that contaminates feedstock and food is increasing worldwide. AFB1 can cause various health problems in humans and animals, as well as direct embryotoxicity. However, the direct toxicity of AFB1 on embryonic development, especially foetal foetus muscle development, has not been studied in depth. In the present study, we used zebrafish embryos as a model to study the mechanism of the direct toxicity of AFB1 to the foetus, including muscle development and developmental toxicity. Our results showed that AFB1 caused motor dysfunction in zebrafish embryos. In addition, AFB1 induces abnormalities in muscle tissue architecture, which in turn causes abnormal muscle development in larvae. Further studies found that AFB1 destroyed the antioxidant capacity and tight junction complexes (TJs), causing apoptosis in zebrafish larvae. In summary, AFB1 may induce developmental toxicity and inhibit muscle development through oxidative damage, apoptosis and disruption of TJs in zebrafish larvae. Our results revealed the direct toxicity effects of AFB1 on the development of embryos and larvae, including inhibition of muscle development and triggering neurotoxicity, induction of oxidative damage, apoptosis and disruption of TJs, and fills the gap in the toxicity mechanism of AFB1 on foetal development.
Collapse
Affiliation(s)
- Xiang-Ning He
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Pei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition, Ministry of Education, Ministry of Agriculture and Rural Affairs, Key Laboratory of Sichuan Provence, Sichuan 611130, China
| | - Wei-Dan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition, Ministry of Education, Ministry of Agriculture and Rural Affairs, Key Laboratory of Sichuan Provence, Sichuan 611130, China
| | - Yang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition, Ministry of Education, Ministry of Agriculture and Rural Affairs, Key Laboratory of Sichuan Provence, Sichuan 611130, China
| | - Sheng-Yao Kuang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Ling Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Hong-Mei Ren
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Hua Li
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Lin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition, Ministry of Education, Ministry of Agriculture and Rural Affairs, Key Laboratory of Sichuan Provence, Sichuan 611130, China.
| | - Xiao-Qiu Zhou
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition, Ministry of Education, Ministry of Agriculture and Rural Affairs, Key Laboratory of Sichuan Provence, Sichuan 611130, China.
| |
Collapse
|
8
|
Jaćević V, Dumanović J, Alomar SY, Resanović R, Milovanović Z, Nepovimova E, Wu Q, Franca TCC, Wu W, Kuča K. Research update on aflatoxins toxicity, metabolism, distribution, and detection: A concise overview. Toxicology 2023; 492:153549. [PMID: 37209941 DOI: 10.1016/j.tox.2023.153549] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/07/2023] [Accepted: 05/17/2023] [Indexed: 05/22/2023]
Abstract
Serious health risks associated with the consumption of food products contaminated with aflatoxins (AFs) are worldwide recognized and depend predominantly on consumed AF concentration by diet. A low concentration of aflatoxins in cereals and related food commodities is unavoidable, especially in subtropic and tropic regions. Accordingly, risk assessment guidelines established by regulatory bodies in different countries help in the prevention of aflatoxin intoxication and the protection of public health. By assessing the maximal levels of aflatoxins in food products which are a potential risk to human health, it's possible to establish appropriate risk management strategies. Regarding, a few factors are crucial for making a rational risk management decision, such as toxicological profile, adequate information concerning the exposure duration, availability of routine and some novel analytical techniques, socioeconomic factors, food intake patterns, and maximal allowed levels of each aflatoxin in different food products which may be varied between countries.
Collapse
Affiliation(s)
- Vesna Jaćević
- Department for Experimental Pharmacology and Toxicology, National Poison Control Centre, Military Medical Academy, Crnotravska 17, 11000 Belgrade, Serbia; Medical Faculty of the Military Medical Academy, University of Defence, Crnotravska 17, 11000 Belgrade, Serbia; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanského 62, 500 03 Hradec Králové, Czech Republic.
| | - Jelena Dumanović
- Medical Faculty of the Military Medical Academy, University of Defence, Crnotravska 17, 11000 Belgrade, Serbia; Department of Analytical Chemistry, Faculty of Chemistry, University of Belgrade, 11158 Belgrade, Serbia
| | - Suliman Y Alomar
- King Saud University, College of Science, Zoology Department, Riyadh, 11451, Saudi Arabia
| | - Radmila Resanović
- Faculty of Veterinary Medicine, University of Belgrade, Bulevar Oslobođenja 18, 11000 Belgrade, Serbia
| | - Zoran Milovanović
- Special Police Unit, Ministry of Interior, Trebevićka 12/A, 11 030 Belgrade, Serbia
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanského 62, 500 03 Hradec Králové, Czech Republic
| | - Qinghua Wu
- College of Life Science, Yangtze University, 1 Nanhuan Road, 434023 Jingzhou, Hubei, China; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanského 62, 500 03 Hradec Králové, Czech Republic
| | - Tanos Celmar Costa Franca
- Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense, Military Institute of Engineering, Praça General Tibúrcio 80, Rio de Janeiro, RJ 22290-270, Brazil; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanského 62, 500 03 Hradec Králové, Czech Republic
| | - Wenda Wu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanského 62, 500 03 Hradec Králové, Czech Republic
| | - Kamil Kuča
- Biomedical Research Center, University Hospital Hradec Kralove, 50005, Hradec Kralove, Czech Republic; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanského 62, 500 03 Hradec Králové, Czech Republic
| |
Collapse
|
9
|
Chen C, Patil CL, Mduma ER, Groopman JD, Riley RT, Wu F. Mycotoxins were not associated with environmental enteropathy in a cohort of Tanzanian children. RISK ANALYSIS : AN OFFICIAL PUBLICATION OF THE SOCIETY FOR RISK ANALYSIS 2023; 43:860-866. [PMID: 35618664 DOI: 10.1111/risa.13956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Enteropathy is a pathophysiological condition characterized by decreased intestinal barrier function and absorption. Past studies have hypothesized that mycotoxins might impair children's growth by causing intestinal enteropathy, including interactions between mycotoxins and pathogens. We investigated the association of two mycotoxins, aflatoxin B1 (AFB1 ) and fumonisin B1 (FB1 ), independently and in conjunction with microbial pathogens, with fecal biomarkers of environmental enteropathy in children. As part of a larger MAL-ED study, 196 children were recruited in Haydom, Tanzania, and followed for the first 36 months of life. The gut inflammation biomarkers myeloperoxidase (MPO), neopterin (NEO), and alpha-1-antitrypsin (A1AT) were analyzed in stool samples at 24 months; with mean concentrations 5332.5 ng/L MPO, 807.2 nmol/L NEO, and 0.18 mg/g A1AT. Forty-eight children were measured for AFB1 -lys, with a mean of 5.30 (95% CI: 3.93-6.66) pg/mg albumin; and 87 were measured for FB1 , with a mean of 1.25 (95% CI: 0.72-1.76) ng/ml urine. Although the pathogens adenovirus and Campylobacter were associated with A1AT (p = 0.049) and NEO (p = 0.004), respectively, no association was observed between aflatoxin (MPO, p = 0.30; NEO, p = 0.08; A1AT, p = 0.24) or fumonisin (MPO, p = 0.38; NEO, p = 0.65; A1AT, p = 0.20) exposure and any gut inflammation biomarkers; nor were interactive effects found between mycotoxins and pathogens in contributing to intestinal enteropathy in this cohort. Although further studies are needed to confirm these results, it is possible that mycotoxins contribute to child growth impairment via mechanisms other than disrupting children's intestinal function.
Collapse
Affiliation(s)
- Chen Chen
- School of Public Health, Shandong University, Jinan, China
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, Michigan, USA
| | - Crystal L Patil
- Department of Women, Children and Family Health Science, University of Illinois at Chicago, College of Nursing, Chicago, Illinois, USA
| | | | - John D Groopman
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Ronald T Riley
- Department of Environmental Health Science, University of Georgia, Athens, Georgia, USA
| | - Felicia Wu
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, Michigan, USA
- Department of Agricultural, Food, and Resource Economics, Michigan State University, East Lansing, Michigan, USA
| |
Collapse
|
10
|
Bastos-Amador P, Duarte EL, Torres J, Caldeira AT, Silva I, Salvador C, Assunção R, Alvito P, Ferreira M. Maternal dietary exposure to mycotoxin aflatoxin B 1 promotes intestinal immune alterations and microbiota modifications increasing infection susceptibility in mouse offspring. Food Chem Toxicol 2023; 173:113596. [PMID: 36603704 DOI: 10.1016/j.fct.2022.113596] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/19/2022] [Accepted: 12/28/2022] [Indexed: 01/03/2023]
Abstract
Mycotoxins are secondary metabolites produced by fungi occurring in food that are toxic to animals and humans. Early-life mycotoxins exposure has been linked to diverse pathologies. However, how maternal exposure to mycotoxins impacts on the intestinal barrier function of progeny has not been explored. Here, exposure of pregnant and lactating C57Bl/6J female mice to aflatoxin B1 (AFB1; 400 μg/kg body weight/day; 3 times a week) in gelatine pellets, from embryonic day (E)11.5 until weaning (postnatal day 21), led to gut immunological changes in progeny. The results showed an overall increase of lymphocyte number in intestine, a reduction of expression of epithelial genes related to microbial defence, as well as a decrease in cytokine production by intestinal type 2 innate lymphoid cells (ILC2). While susceptibility to chemically induced colitis was not worsened, immune alterations were associated with changes in gut microbiota and with a higher vulnerability to infection by the protozoan Eimeria vermiformis at early-life. Together these results show that maternal dietary exposure to AFB1 can dampen intestinal barrier homeostasis in offspring decreasing their capability to tackle intestinal pathogens. These data provide insights to understand AFB1 potential harmfulness in early-life health in the context of intestinal infections.
Collapse
Affiliation(s)
- Patricia Bastos-Amador
- Food and Nutrition Department, National Institute of Health Dr. Ricardo Jorge, 1649-016, Lisbon, Portugal; Champalimaud Foundation, Champalimaud Centre for the Unknown, 1400-038, Lisbon, Portugal
| | - Elsa Leclerc Duarte
- University of Évora, School of Science and Technology, 7000-671, Évora, Portugal; MED-Mediterranean Institute for Agriculture, Environment and Development, 7006-554, Évora, Portugal
| | - Júlio Torres
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology, Center for Neuroscience and Cell Biology, 3004-504, Coimbra, Portugal
| | | | - Inês Silva
- University of Évora, School of Science and Technology, 7000-671, Évora, Portugal; MED-Mediterranean Institute for Agriculture, Environment and Development, 7006-554, Évora, Portugal; HERCULES Laboratory, Universidade de Évora, 7000-809, Évora, Portugal
| | - Cátia Salvador
- HERCULES Laboratory, Universidade de Évora, 7000-809, Évora, Portugal
| | - Ricardo Assunção
- IUEM, Instituto Universitário Egas Moniz, Egas Moniz-Cooperativa de Ensino Superior, CRL, 2829 - 511, Caparica, Portugal; University of Aveiro, CESAM - Centre for Environmental and Marine Studies, 3810-193, Aveiro, Portugal
| | - Paula Alvito
- Food and Nutrition Department, National Institute of Health Dr. Ricardo Jorge, 1649-016, Lisbon, Portugal; University of Aveiro, CESAM - Centre for Environmental and Marine Studies, 3810-193, Aveiro, Portugal
| | - Manuela Ferreira
- Champalimaud Foundation, Champalimaud Centre for the Unknown, 1400-038, Lisbon, Portugal; University of Coimbra, Center for Innovative Biomedicine and Biotechnology, Center for Neuroscience and Cell Biology, 3004-504, Coimbra, Portugal.
| |
Collapse
|
11
|
Tesfamariam K, Gebreyesus SH, Lachat C, Hanley-Cook GT, Roro M, Mengistu YG, Endris BS, Belachew T, Kolsteren P, De Saeger S, De Boevre M, Argaw A. Chronic aflatoxin exposure during pregnancy is associated with lower fetal growth trajectories: a prospective cohort from the Butajira Nutrition, Mental Health, and Pregnancy (BUNMAP) Study in rural Ethiopia. Am J Clin Nutr 2022; 116:1634-1641. [PMID: 36178051 DOI: 10.1093/ajcn/nqac280] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 09/28/2022] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Aflatoxins are toxic secondary metabolites produced by Aspergillus fungi, which are ubiquitously present in the food supplies of low- and middle-income countries. Studies of maternal aflatoxin exposure and fetal outcomes are mainly focused on size at birth and the effect on intrauterine fetal growth has not been assessed. OBJECTIVES In the present study, we examined the association between chronic aflatoxin exposure during pregnancy and fetal growth trajectories in a rural setting in Ethiopia. METHODS In a prospective cohort study, we enrolled 492 pregnant females, with a singleton pregnancy and before 28 wk of gestation. Serum aflatoxin B1-lysine concentration was measured using LC-tandem MS. Three rounds of ultrasound measurements were conducted to estimate fetal weight at mean ± SD gestational age weeks of 19.1 ± 3.71, 28.5 ± 3.51, and 34.5 ± 2.44. Estimated fetal weight was expressed in centiles using the International Fetal and Newborn Growth Consortium for the 21st Century (INTERGROWTH-21st) reference. We fitted a multivariable linear mixed-effects model to estimate the rate of fetal growth between aflatoxin-exposed (i.e., aflatoxin B1-lysine concentration above or equal to the limit of detection) and unexposed mothers in the study. RESULTS Mothers had a mean ± SD age of 26.0 ± 4.58 y. The median (25th, 75th percentile) serum aflatoxin B1-lysine concentration was 12.6 (0.93, 96.9) pg/mg albumin, and aflatoxin exposure was observed in 86.6% of maternal blood samples. Eighty-five percent of the females enrolled provided at least 2 ultrasound measurements for analysis. On average, the aflatoxin-exposed group had a significantly lower change over time in fetal weight-for-gestational-age centile than the unexposed group (ß = -0.92; 95% CI: -1.77, -0.06 centiles/week; P = 0.037). CONCLUSIONS Chronic maternal aflatoxin exposure is associated with lower fetal growth over time. Our findings emphasize the importance of nutrition-sensitive strategies to mitigate dietary aflatoxin exposure and adopting food safety measures in low-income settings, in particular during the fetal period of development.
Collapse
Affiliation(s)
- Kokeb Tesfamariam
- Department of Food Technology, Safety, and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.,Department of Public Health, College of Medicine and Health Sciences, Ambo University, Ambo, Ethiopia.,Center of Excellence in Mycotoxicology and Public Health, MYTOX-SOUTH Coordination Unit, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,Department of Population and Family Health, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Seifu H Gebreyesus
- Department of Nutrition and Dietetics, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
| | - Carl Lachat
- Department of Food Technology, Safety, and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Giles T Hanley-Cook
- Department of Food Technology, Safety, and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Meselech Roro
- Department of Reproductive Health and Health Service Management, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
| | - Yalemwork G Mengistu
- Department of Nutrition and Dietetics, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
| | - Bilal S Endris
- Department of Nutrition and Dietetics, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
| | - Tefera Belachew
- Department of Population and Family Health, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Patrick Kolsteren
- Department of Food Technology, Safety, and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Sarah De Saeger
- Center of Excellence in Mycotoxicology and Public Health, MYTOX-SOUTH Coordination Unit, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Gauteng, South Africa
| | - Marthe De Boevre
- Center of Excellence in Mycotoxicology and Public Health, MYTOX-SOUTH Coordination Unit, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Alemayehu Argaw
- Department of Food Technology, Safety, and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.,Department of Population and Family Health, Institute of Health, Jimma University, Jimma, Ethiopia
| |
Collapse
|
12
|
Comprehensive Review of Aflatoxin Contamination, Impact on Health and Food Security, and Management Strategies in Pakistan. Toxins (Basel) 2022; 14:toxins14120845. [PMID: 36548742 PMCID: PMC9781569 DOI: 10.3390/toxins14120845] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/22/2022] [Accepted: 11/26/2022] [Indexed: 12/05/2022] Open
Abstract
Aflatoxins (AFs) are the most important toxic, mutagenic, and carcinogenic fungal toxins that routinely contaminate food and feed. While more than 20 AFs have been identified to date, aflatoxin B1 (AFB1), B2 (AFB2), G1 (AFG1), G2 (AFG2), and M1 (AFM1) are the most common. Over 25 species of Aspergillus have been shown to produce AFs, with Aspergillus flavus, Aspergillus parasiticus, and Aspergillus nomius being the most important and well-known AF-producing fungi. These ubiquitous molds can propagate on agricultural commodities to produce AFs in fields and during harvesting, processing, transportation, and storage. Countries with warmer climates and that produce foods susceptible to AF contamination shoulder a substantial portion of the global AF burden. Pakistan's warm climate promotes the growth of toxigenic fungi, resulting in frequent AF contamination of human foods and animal feeds. The potential for contamination in Pakistan is exacerbated by improper storage conditions and a lack of regulatory limits and enforcement mechanisms. High levels of AFs in common commodities produced in Pakistan are a major food safety problem, posing serious health risks to the population. Furthermore, aflatoxin contamination contributes to economic losses by limiting exports of these commodities. In this review, recent information regarding the fungal producers of AFs, prevalence of AF contamination of foods and feed, current regulations, and AF prevention and removal strategies are summarized, with a major focus on Pakistan.
Collapse
|
13
|
Srinivasan B, Ghosh S, Webb P, Griswold SP, Xue KS, Wang JS, Mehta S. Assessing an aflatoxin exposure biomarker: Exploring the interchangeability and correlation between venous and capillary blood samples. ENVIRONMENTAL RESEARCH 2022; 215:114396. [PMID: 36154854 DOI: 10.1016/j.envres.2022.114396] [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: 03/14/2022] [Revised: 07/09/2022] [Accepted: 09/18/2022] [Indexed: 06/16/2023]
Abstract
Exposure to dietary aflatoxins has been recognized as a potential threat to child nutrition and growth, in addition to being a known carcinogen. The ability to accurately assess concentration of aflatoxin in the blood of at-risk individuals is therefore very important to inform public health policies and on-the-ground programs around the world. Venous blood is frequently used to quantify biomarkers of exposure such as AFB1-lysine adducts. However, venous blood collection methods are invasive, requiring highly trained staff, which makes this method challenging to implement, especially in resource-limited settings. In contrast, capillary blood collection by fingerprick is less invasive and has the potential for application in point-of-need monitoring. The aim of this exploratory study was to investigate the correlation and interchangeability of capillary and venous human blood samples in the quantification of AFB1-lysine adduct concentration. A total of 72 venous and capillary blood samples were collected from 36 women of reproductive age (16-49 years) in northern Uganda. All sample specimens were analyzed using high-performance liquid chromatography with fluorescence detection. Regression analysis and Bland-Altman analysis were performed to compare AFB1-lysine concentrations between venous and capillary sample pairs. Bland-Altman analysis of albumin-normalized AFB1-lysine data-bias was -0.023 pg/mg-albumin and the 95% limits of agreement were 0.51 to -0.56 pg/mg-albumin for log-transformed data. There was a positive correlation between albumin-normalized venous and capillary AFB1-lysine concentrations with r of 0.71 (p < .0001). A lack of any accepted clinical cutoff for aflatoxin exposure makes definition of an 'acceptable' limit for statistical analysis and comparison of methods challenging. Our data suggests a positive correlation between albumin-normalized AFB1-lysine concentrations in venous and capillary sample pairs, but relatively weak agreement and interchangeability based on Bland-Altman analysis.
Collapse
Affiliation(s)
- Balaji Srinivasan
- Center for Precision Nutrition and Health, Division of Nutritional Sciences, Cornell University, Ithaca, NY, 14853, USA.
| | - Shibani Ghosh
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Patrick Webb
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Stacy P Griswold
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Kathy S Xue
- Department of Environmental Health Science, University of Georgia, Athens, GA, USA
| | - Jia-Sheng Wang
- Department of Environmental Health Science, University of Georgia, Athens, GA, USA
| | - Saurabh Mehta
- Center for Precision Nutrition and Health, Division of Nutritional Sciences, Cornell University, Ithaca, NY, 14853, USA.
| |
Collapse
|
14
|
Guo C, Liu Y, Wang Y, Wang Q, Huo S, Zhang X, Cao Z, Song M, Li Y. PINK1/Parkin-mediated mitophagy is activated to protect against AFB 1-induced immunosuppression in mice spleen. Toxicol Lett 2022; 366:33-44. [PMID: 35810998 DOI: 10.1016/j.toxlet.2022.07.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 06/16/2022] [Accepted: 07/05/2022] [Indexed: 12/26/2022]
Abstract
Aflatoxin B1 (AFB1) can cause mitochondrial malfunction and immunosuppression in spleen. Mitochondrial damage can lead to oxidative stress and aggravate immune cell dysfunction. Phosphatase and tensin homolog (PTEN)-induced putative kinase1 (PINK1)/ E3 ubiquitin ligase PARK2 (Parkin)-mediated mitophagy can scavenge damaged mitochondria and alleviate oxidative stress to maintain cellular homeostasis. However, the role of PINK1/Parkin-mediated mitophagy in AFB1-induced immunosuppression in spleen is unclear. In this study, sixty male mice were sensibilized orally with AFB1 at different concentrations [0, 0.5, 0.75, and 1 mg/kg body weight (BW)] for 28 days, and AFB1 caused splenic structure injury and immunosuppression, also led to upregulation of PINK1/Parkin-mediated mitophagy in a dose-dependent manner. Subsequently, thirty male WT C57BL/6 N mice and thirty male Parkin knockout (Parkin-/-) C57BL/6 N mice were sensibilized orally with AFB1 at 0 or 1 mg/kg BW for 28 days, and Parkin-/- inhibited mitophagy and further aggravated AFB1-induced splenic structure injury, immunosuppression, mitochondrial damage and oxidative stress. Collectively, these results indicate that AFB1 exposure activates PINK1/Parkin-mediated mitophagy, which protects against immunosuppression in spleen.
Collapse
Affiliation(s)
- Chen Guo
- Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural. University, Harbin 150030, China
| | - Yanfen Liu
- Liaoning Agricultural Technical College, Yingkou 115009, China
| | - Yuping Wang
- Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural. University, Harbin 150030, China
| | - Qi Wang
- Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural. University, Harbin 150030, China
| | - Siming Huo
- Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural. University, Harbin 150030, China
| | - Xuliang Zhang
- Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural. University, Harbin 150030, China
| | - Zheng Cao
- Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural. University, Harbin 150030, China
| | - Miao Song
- Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural. University, Harbin 150030, China
| | - Yanfei Li
- Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural. University, Harbin 150030, China.
| |
Collapse
|
15
|
Ashraf W, Rehman A, Ahmad MUD, Rabbani M, Mushtaq MH, Aamir K, Xue KS, Wang JS. Assessment of aflatoxin B 1-lysine adduct in children and its effect on child growth in Lahore, Pakistan. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:1463-1473. [PMID: 35652855 DOI: 10.1080/19440049.2022.2080871] [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] [Indexed: 10/18/2022]
Abstract
Aflatoxin B1 is an important toxic food contaminant and there is very little information available about its exposure and effects on the health of the Pakistani population. Therefore, children (n = 238) aged 1-11 years were recruited in this study to estimate the levels of aflatoxin B1-lysine adduct and to measure its adverse effects on growth. Blood samples were analyzed to detect AFB1-lysine adducts through high-performance liquid chromatography. Socio-demographic information and anthropometry measurements were also obtained. All participants had detectable levels of AFB1-lysine adduct with a median concentration of 10.66 pg/mg albumin (95% CI: 8.6-12.4). Differences in area of residence (p < 0.05) and the father's employment (p < 0.05) were significant predictors for aflatoxin concentration levels in ordinary least square and quantile regression models (residence in 75th quantile and father employment in 90th quantile). Children aged from 5 to 11 years in the 5th and 90th quantiles of the regression model had a significant association with aflatoxin levels. A very high (50.4%, 120/238) prevalence of growth impairment (stunting, wasting, and underweight) was also observed in this study. Although we couldn't establish the effect of aflatoxin on growth impairment, children with low serum albumin levels (OR = 0.18; 95% CI: 0.05-0.56; p = 0.004) were likely to be at risk of wasting. Also, low birth weight was strongly associated with wasting (OR = 3.11; 95% CI: 1.36-7.03; p = 0.006) and underweight (OR = 4.60; 95% CI: 2.21-10.05; p= <0.001), while the mother's school level education had a correlation with child stunting (OR = 1.84; 95% CI: 1.07-3.22; p = 0.029). The high prevalence of growth impairment and high concentration of serum AFB1-lysine adduct levels in study participants demand immediate efforts to mitigate the adverse health outcomes in children in Pakistan.
Collapse
Affiliation(s)
- Waseela Ashraf
- Department of Epidemiology and Public Health, University of Veterinary and Animal Sciences, Lahore, Pakistan.,Department of Environmental Health Science, The University of Georgia, Athens, GA, USA
| | - Abdul Rehman
- Department of Epidemiology and Public Health, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Mansur-Ud-Din Ahmad
- Department of Epidemiology and Public Health, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Masood Rabbani
- Institute of Microbiology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Hassan Mushtaq
- Department of Epidemiology and Public Health, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Khalida Aamir
- Department of Preventive Pediatric Medicine, The Children's Hospital and The Institute of Child Health, Lahore, Pakistan
| | - Kathy S Xue
- Department of Environmental Health Science, The University of Georgia, Athens, GA, USA
| | - Jia-Sheng Wang
- Department of Environmental Health Science, The University of Georgia, Athens, GA, USA
| |
Collapse
|
16
|
Alvito P, Pereira-da-Silva L. Mycotoxin Exposure during the First 1000 Days of Life and Its Impact on Children’s Health: A Clinical Overview. Toxins (Basel) 2022; 14:toxins14030189. [PMID: 35324686 PMCID: PMC8955462 DOI: 10.3390/toxins14030189] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/20/2022] [Accepted: 03/02/2022] [Indexed: 02/04/2023] Open
Abstract
The first 1000 days of life are very sensitive to any event that alters health programming, and they represent a window for intervention to improve population health. Pregnant women, fetuses, and infants are particularly vulnerable to exposure to food contaminated with mycotoxins. This review aimed to gather data from the literature on mycotoxins exposure during intrauterine life and early childhood, and associated health risks, as assessed through human biomonitoring and mycotoxins occurrence in foods, in different continents. Maternal internal exposure to aflatoxins is associated with fetal growth restriction, while exposure to fumonisins increases the risk of offspring’s neural tube defects. Mycotoxin contamination of breast milk is reported worldwide, but data on adverse effects of the lactational transfer of mycotoxins on infant health are lacking. Young children are exposed to mycotoxins through contaminated infant formulas and baby foods. Both external and internal exposure to aflatoxins and fumonisins in children are reported to be associated with growth impairment. In low-income settings, where other co-factors can affect growth, this association should be interpreted with caution. Further studies on human biomonitoring of mother–infant pairs and young children are needed to guide management strategies aiming to minimize mycotoxin exposure at critical developmental stages.
Collapse
Affiliation(s)
- Paula Alvito
- Food and Nutrition Department, National Institute of Health Dr. Ricardo Jorge, 1649-016 Lisbon, Portugal
- Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal
- Correspondence:
| | - Luís Pereira-da-Silva
- Comprehensive Health Research Centre, NOVA Medical School|Faculdade de Ciências Médicas, 1169-056 Lisbon, Portugal;
- Hospital Dona Estefânia, Centro Hospitalar Universitário de Lisboa Central, 1169-045 Lisbon, Portugal
| |
Collapse
|
17
|
Ajmal M, Alshannaq AF, Moon H, Choi D, Akram A, Nayyar BG, Gibbons JG, Yu JH. Characterization of 260 Isolates of Aspergillus Section Flavi Obtained from Sesame Seeds in Punjab, Pakistan. Toxins (Basel) 2022; 14:toxins14020117. [PMID: 35202144 PMCID: PMC8876583 DOI: 10.3390/toxins14020117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 01/31/2022] [Accepted: 02/02/2022] [Indexed: 11/16/2022] Open
Abstract
Sesame Sesamum indicum L. is a major oil-based seed crop that has been widely cultivated and consumed in Pakistan. Unfortunately, sesame is highly prone to Aspergillus fungal growth in the field, and under inappropriate storage conditions can become contaminated with aflatoxins, the most potent carcinogen found in nature. Here, we have isolated a high number of Aspergillus isolates from sesame seeds in fresh and stored conditions obtained from rainfed and irrigated zones of Punjab, Pakistan, and characterized them for aflatoxigenic potentials. Using morphological identification techniques, 260 isolates were grouped as potential Aspergillus section Flavi, with 126 and 134 originating from the rainfed and irrigated zones, respectively. Out of 260 in total, 188 isolates were confirmed to produce aflatoxins. There were no significant differences in potential aflatoxigenic isolates with respect to the rainfed and irrigated zones. However, the number of potential aflatoxigenic isolates was significantly higher (p < 0.05) in stored samples than that of those from fresh sesame seeds in the rainfed and irrigated zone. Whole genome sequencing and comparative analyses of 12 select isolates have revealed that one of the A. flavus isolates, which produced very low aflatoxins (AFP10), has an elevated missense variant rate, numerous high impact mutations, and a 600 base pair deletion in the norB gene. In summary, our study provides insights into aflatoxigenic potential and the associated genetic diversity of indigenous Aspergillus section Flavi isolates and potential management strategies for reducing aflatoxin contamination levels in a major crop consumed in Punjab, Pakistan.
Collapse
Affiliation(s)
- Maryam Ajmal
- Department of Botany, Faculty of Sciences, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan; (M.A.); (A.A.)
| | - Ahmad F. Alshannaq
- Department of Bacteriology, Food Research Institute, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA; (A.F.A.); (H.M.); (D.C.)
| | - Heungyun Moon
- Department of Bacteriology, Food Research Institute, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA; (A.F.A.); (H.M.); (D.C.)
| | - Dasol Choi
- Department of Bacteriology, Food Research Institute, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA; (A.F.A.); (H.M.); (D.C.)
| | - Abida Akram
- Department of Botany, Faculty of Sciences, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan; (M.A.); (A.A.)
| | - Brian Gagosh Nayyar
- Department of Botany, Faculty of Sciences, University of Sialkot, Sialkot 51310, Pakistan;
| | - John G. Gibbons
- Department of Food Science, College of Natural Sciences, University of Massachusetts, Amherst, MA 01003, USA;
| | - Jae-Hyuk Yu
- Department of Bacteriology, Food Research Institute, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA; (A.F.A.); (H.M.); (D.C.)
- Department of Systems Biotechnology, Konkuk Institute of Science and Technology, Konkuk University, Seoul 05029, Korea
- Correspondence:
| |
Collapse
|
18
|
Tesfamariam K, Argaw A, Hanley-Cook GT, Gebreyesus SH, Kolsteren P, Belachew T, Van de Velde M, De Saeger S, De Boevre M, Lachat C. Multiple mycotoxin exposure during pregnancy and risks of adverse birth outcomes: a prospective cohort study in rural Ethiopia. ENVIRONMENT INTERNATIONAL 2022; 160:107052. [PMID: 34952355 DOI: 10.1016/j.envint.2021.107052] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/14/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
INTRODUCTION Mycotoxin exposure during pregnancy has been associated with adverse birth outcomes in low- and middle-income countries. The evidence, however, is inconsistent and mainly limited to the assessment of a single mycotoxin. We assessed biomarkers of exposure to multiple mycotoxins during pregnancy and their associations with adverse birth outcomes in rural Ethiopia. METHODS We analyzed data from 579 pregnant women between 8 and 24 weeks of completed gestation enrolled in a prospective cohort study. Serum mycotoxin concentrations were determined using liquid chromatography coupled with tandem mass spectrometry. Multivariable linear probability models, adjusted for potential confounding factors and multiple comparisons, were fitted to assess the associations between mycotoxin exposure and small for gestational age and preterm birth. We applied principal component analysis to reduce the dimensionality of biomarker data from several taxonomic mycotoxin groups. RESULTS All pregnant women were co-exposed to at least five mycotoxins, and one pregnant woman was co-exposed to 27 mycotoxins. Fumonisins (FB), i.e., FB2, FB3, FB1, and tenuazonic acid were the most frequently identified mycotoxins in 98.8, 95.3, 93.3, and 81.4% of the samples respectively. Deoxynivalenol was detected in 38.7%, nivalenol in 50.1%, ochratoxin α in 67.9%, and zearalenone in 50.9% of the serum samples. After adjustment, we found no statistically significant (all P ≥ 0.05) associations between mycotoxin exposures and birth outcomes. CONCLUSIONS Despite our study providing no evidence for relationships between mycotoxin biomarkers and adverse birth outcomes, our findings do indicate an extensive presence of multiple mycotoxin exposure among pregnant women. Public health policies and nutrition-sensitive interventions must ensure exposure to mycotoxins is reduced in rural Ethiopia.
Collapse
Affiliation(s)
- Kokeb Tesfamariam
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium; Department of Public Health, College of Medicine and Health Sciences, Ambo University, Ambo, Ethiopia; Center of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, MYTOX-SOUTH® Coordination Unit, Ghent, Belgium; Department of Population and Family Health, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Alemayehu Argaw
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium; Department of Population and Family Health, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Giles T Hanley-Cook
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Seifu H Gebreyesus
- Department of Nutrition and Dietetics, School of Public Health, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Patrick Kolsteren
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Tefera Belachew
- Department of Population and Family Health, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Mario Van de Velde
- Center of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, MYTOX-SOUTH® Coordination Unit, Ghent, Belgium
| | - Sarah De Saeger
- Center of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, MYTOX-SOUTH® Coordination Unit, Ghent, Belgium; Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Gauteng, South Africa
| | - Marthe De Boevre
- Center of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, MYTOX-SOUTH® Coordination Unit, Ghent, Belgium
| | - Carl Lachat
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
| |
Collapse
|
19
|
Smith JW, Matchado AJ, Wu LSF, Arnold CD, Burke SM, Maleta KM, Ashorn P, Stewart CP, Shaikh S, Ali H, Labrique AB, West KP, Christian P, Dewey KG, Groopman JD, Schulze KJ. Longitudinal Assessment of Prenatal, Perinatal, and Early-Life Aflatoxin B 1 Exposure in 828 Mother-Child Dyads from Bangladesh and Malawi. Curr Dev Nutr 2022; 6:nzab153. [PMID: 35155983 PMCID: PMC8829025 DOI: 10.1093/cdn/nzab153] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/14/2021] [Accepted: 12/22/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND In utero or early-life exposure to aflatoxin, which contaminates staple crops in disadvantaged settings, may compromise pregnancy and infant outcomes, but investigations into the extent, persistence, and determinants of aflatoxin exposure at these life stages have lacked longitudinal data collection and broad geographic representation. OBJECTIVES Aflatoxin exposure and selected determinants thereof were characterized in mother-child dyads with serial plasma/serum samples in prenatal, perinatal, and early life in Malawi and Bangladesh. METHODS Circulating aflatoxin B1 (AFB1)-lysine albumin adducts were measured in dyads from Bangladesh (n = 573; maternal first and third trimester, 3 mo postpartum, cord blood, infant 24 mo) and Malawi (n = 255; maternal second and third trimester, 6 mo postpartum, infant 6 and 18 mo) with isotope dilution mass spectrometry. We examined AFB1-lysine adduct magnitude, persistence, seasonality, and associations with infant feeding, and estimated daily AFB1 intake. RESULTS Maternal AFB1-lysine was higher in Malawi (98% detectable; median: 0.469, IQR: 0.225-1.027 pg/µL) than in Bangladesh (59%; 0.030, nondetectable [nd]-0.077 pg/µL). Although estimated dietary exposure in Malawi was temporally stable (648 ng AFB1/day), estimated intake in Bangladesh was reduced by 94% between rainy and winter seasons (98 to 6 ng/day). AFB1-lysine was low in cord blood from Bangladesh (15% detectable; 0.045, 0.031-0.088 pg/µL among detectable) and in Malawian infants at 6 mo of age (0.072, nd-0.236 pg/µL), but reached maternal concentrations by 18 or 24 mo (Bangladesh: 0.034, nd-0.063 pg/µL; Malawi: 0.370, 0.195-0.964 pg/µL). In Malawian infants, exclusive breastfeeding at 3 mo was associated with 58% lower AFB1-lysine concentrations at 6 mo compared with other feeding modes (P = 0.010). CONCLUSIONS Among pregnant women, aflatoxin exposure was persistently high in Malawi, while lower and seasonal in Bangladesh. Infants were partially protected from exposure in utero and with exclusive breastfeeding, but exposures reached adult levels by 18-24 mo of age. The Bangladesh and Malawi trials are registered at clinicaltrials.gov as NCT00860470 and NCT01239693.
Collapse
Affiliation(s)
- Joshua W Smith
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Andrew J Matchado
- Department of Nutrition and Institute for Global Nutrition, University of California, Davis, Davis, CA, USA
- School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Lee S-F Wu
- Center for Human Nutrition, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Charles D Arnold
- Department of Nutrition and Institute for Global Nutrition, University of California, Davis, Davis, CA, USA
| | - Sean M Burke
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Kenneth M Maleta
- School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Per Ashorn
- Tampere University, Faculty of Medicine and Health Technology, Center for Child, Adolescent and Maternal Health Research and Tampere University Hospital, Department of Pediatrics, Tampere, Finland
| | - Christine P Stewart
- Department of Nutrition and Institute for Global Nutrition, University of California, Davis, Davis, CA, USA
| | - Saijuddin Shaikh
- Center for Human Nutrition, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
- The JiVitA Project of Johns Hopkins University, Bangladesh, Gaibandha, Bangladesh
| | - Hasmot Ali
- Center for Human Nutrition, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
- The JiVitA Project of Johns Hopkins University, Bangladesh, Gaibandha, Bangladesh
| | - Alain B Labrique
- Center for Human Nutrition, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Keith P West
- Center for Human Nutrition, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Parul Christian
- Center for Human Nutrition, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Kathryn G Dewey
- Department of Nutrition and Institute for Global Nutrition, University of California, Davis, Davis, CA, USA
| | - John D Groopman
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Kerry J Schulze
- Center for Human Nutrition, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| |
Collapse
|
20
|
Kortei NK, Annan T, Kyei-Baffour V, Essuman EK, Boakye AA, Tettey CO, Boadi NO. Exposure assessment and cancer risk characterization of aflatoxin M1 (AFM1) through ingestion of raw cow milk in southern Ghana. Toxicol Rep 2022; 9:1189-1197. [DOI: 10.1016/j.toxrep.2022.05.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 12/27/2022] Open
|
21
|
Effects of Prenatal Exposure to Aflatoxin B1: A Review. Molecules 2021; 26:molecules26237312. [PMID: 34885894 PMCID: PMC8659025 DOI: 10.3390/molecules26237312] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/25/2021] [Accepted: 11/27/2021] [Indexed: 11/17/2022] Open
Abstract
Aflatoxins are mycotoxins produced as secondary fungal metabolites. Among them, aflatoxin B1 (AFB1) stands out due to its genotoxic and mutagenic potential, being a potent initiator of carcinogenesis. In this review, the outcomes from the published literature in the past 10 years on the effects of AFB1 pathophysiological mechanisms on embryological and fetal development are discussed. In several animal species, including humans, AFB1 has a teratogenic effect, resulting in bone malformations, visceral anomalies, lesions in several organs, and behavioral and reproductive changes, in addition to low birth weight. The mutagenic capacity of AFB1 in prenatal life is greater than in adults, indicating that when exposure occurs in the womb, the risk of the development of neoplasms is higher. Studies conducted in humans indicate that the exposure to this mycotoxin during pregnancy is associated with low birth weight, decreased head circumference, and DNA hypermethylation. However, as the actual impacts on humans are still unclear, the importance of this issue cannot be overemphasized and studies on the matter are essential.
Collapse
|
22
|
Ajmal M, Akram A, Hanif NQ, Mukhtar T, Arshad M. Mycobiota Isolation and Aflatoxin B1 Contamination in Fresh and Stored Sesame Seeds from Rainfed and Irrigated Zones of Punjab, Pakistan. J Food Prot 2021; 84:1673-1682. [PMID: 34086928 DOI: 10.4315/jfp-21-060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 05/28/2021] [Indexed: 11/11/2022]
Abstract
ABSTRACT This study was carried out to evaluate the prevalence of mycobiota and aflatoxin (AF) B1 contamination in sesame seeds from rainfed and irrigated zones of the Punjab, Pakistan. For this purpose, 100 sesame seed samples were collected directly from the fields of major sesame-producing areas in rainfed and irrigated zones. The agar plate method was used for isolation of mycobiota, and thin-layer chromatography was used to determine AFB1 concentrations. Seed samples were then stored for 12 months. After 12 months, the seeds were again analyzed for mycobiota and AFB1 for comparison. All samples were positive for fungal growth under fresh and stored conditions. Twenty-one fungal species of 10 genera were isolated. Aspergillus flavus was the most prevalent contaminant found in fresh and stored sesame seeds from rainfed and irrigated zones, followed by Aspergillus niger, Alternaria alternata, and Fusarium oxysporum. The least prevalent fungi were Aspergillus ochraceus and Cladosporium oxysporum. Analysis revealed that 92% of fresh and 99% of stored seed samples were contaminated with AFB1. In the rainfed zone, 88% of fresh and 100% of stored seed samples were contaminated with AFB1, with mean concentrations of 15.74 and 33.8 ppb, respectively. In the irrigated zone, 96% of fresh and 98% of stored seed samples were contaminated with AFB1, with mean concentrations of 20.5 and 27.56 ppb, respectively. AFB1 concentrations >20 ppb were found in 20% of fresh and 100% of stored seeds samples from the rainfed zone and in 28% of fresh and 60% of stored samples from the irrigated zone and thus were not fit for human consumption as per the maximum limit (20 ppb) assigned by the U.S. Food and Drug Administration and the Food and Agriculture Organization of the United Nations. This report is the first on the mycobiota and AFB1 contamination in sesame seeds from rainfed and irrigated zones of the Punjab, Pakistan. These baseline data are an initial step in the effort to deal with this significant food safety issue. HIGHLIGHTS
Collapse
Affiliation(s)
- Maryam Ajmal
- Department of Botany, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
| | - Abida Akram
- Department of Botany, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
| | | | - Tariq Mukhtar
- Department of Plant Pathology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
| | - Muhammad Arshad
- Department of Botany, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
| |
Collapse
|
23
|
Ivanovics B, Gazsi G, Reining M, Berta I, Poliska S, Toth M, Domokos A, Nagy B, Staszny A, Cserhati M, Csosz E, Bacsi A, Csenki-Bakos Z, Acs A, Urbanyi B, Czimmerer Z. Embryonic exposure to low concentrations of aflatoxin B1 triggers global transcriptomic changes, defective yolk lipid mobilization, abnormal gastrointestinal tract development and inflammation in zebrafish. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125788. [PMID: 33838512 DOI: 10.1016/j.jhazmat.2021.125788] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 03/19/2021] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
Aflatoxin B1-contaminated feeds and foods induce various health problems in domesticated animals and humans, including tumor development and hepatotoxicity. Aflatoxin B1 also has embryotoxic effects in different livestock species and humans. However, it is difficult to distinguish between the indirect, maternally-mediated toxic effects and the direct embryotoxicity of aflatoxin B1 in mammals. In the present study, we investigated the aflatoxin B1-induced direct embryotoxic effects in a zebrafish embryo model system combining toxicological, transcriptomic, immunological, and biochemical approaches. Embryonic exposure to aflatoxin B1 induced significant changes at the transcriptome level resulting in elevated expression of inflammatory gene network and repression of lipid metabolism and gastrointestinal tract development-related gene sets. According to the gene expression changes, massive neutrophil granulocyte influx, elevated nitric oxide production, and yolk lipid accumulation were observed in the abdominal region of aflatoxin B1-exposed larvae. In parallel, aflatoxin B1-induced defective gastrointestinal tract development and reduced L-arginine level were found in our model system. Our results revealed the complex direct embryotoxic effects of aflatoxin B1, including inhibited lipid utilization, defective intestinal development, and inflammation.
Collapse
Affiliation(s)
- Bence Ivanovics
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Godollo, Hungary
| | - Gyongyi Gazsi
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Godollo, Hungary
| | - Marta Reining
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Godollo, Hungary
| | - Izabella Berta
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Godollo, Hungary
| | - Szilard Poliska
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Marta Toth
- Department of Immunology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Apolka Domokos
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; Molecular Cell and Immunobiology Doctoral School, Faculty of Medicine, University of Debrecen, H-4032, Debrecen, Hungary
| | - Bela Nagy
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Adam Staszny
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Godollo, Hungary
| | - Matyas Cserhati
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Godollo, Hungary
| | - Eva Csosz
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Attila Bacsi
- Department of Immunology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Zsolt Csenki-Bakos
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Godollo, Hungary
| | - Andras Acs
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Godollo, Hungary
| | - Bela Urbanyi
- Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Godollo, Hungary.
| | - Zsolt Czimmerer
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary.
| |
Collapse
|
24
|
Aflatoxin Biosynthesis, Genetic Regulation, Toxicity, and Control Strategies: A Review. J Fungi (Basel) 2021; 7:jof7080606. [PMID: 34436145 PMCID: PMC8397101 DOI: 10.3390/jof7080606] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 07/19/2021] [Accepted: 07/22/2021] [Indexed: 12/24/2022] Open
Abstract
Aflatoxins (AFs) are highly toxic and cancer-causing compounds, predominantly synthesized by the Aspergillus species. AFs biosynthesis is a lengthy process that requires as minimum as 30 genes grouped inside 75 kilobytes (kB) of gene clusters, which are regulated by specific transcription factors, including aflR, aflS, and some general transcription factors. This paper summarizes the status of research on characterizing structural and regulatory genes associated with AF production and their roles in aflatoxigenic fungi, particularly Aspergillus flavus and A. parasiticus, and enhances the current understanding of AFs that adversely affect humans and animals with a great emphasis on toxicity and preventive methods.
Collapse
|
25
|
The Presence of Mycotoxins in Human Amniotic Fluid. Toxins (Basel) 2021; 13:toxins13060409. [PMID: 34207874 PMCID: PMC8228883 DOI: 10.3390/toxins13060409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/05/2021] [Accepted: 06/08/2021] [Indexed: 12/12/2022] Open
Abstract
Mycotoxin exposure assessments through biomonitoring studies, based on the analysis of amniotic fluid, provides useful information about potential exposure of mothers and fetuses to ubiquitous toxic metabolites that are routinely found in food and the environment. In this study, amniotic fluid samples (n = 86) were collected via abdominal amniocentesis at 15–22 weeks of gestation from pregnant women with a high risk of chromosomal anomalies or genetic fetal defects detected during 1st trimester prenatal screening. These samples were analyzed for the presence of the most typical Aspergillus, Penicillium and Fusarium mycotoxins, with a focus on aflatoxins, ochratoxins and trichothecenes, using the LC-FLD/DAD method. The results showed that the toxin was present in over 75% of all the tested samples and in 73% of amniotic fluid samples from fetuses with genetic defects. The most frequently identified toxins were nivalenol (33.7%) ranging from <LOQ to 4037.6 ng/mL, and aflatoxins (31.4%), including aflatoxin G1, ranging from <LOQ to 0.4 ng/mL. Ochratoxin A and deoxynivalenol were identified in 26.7% and 27.9% of samples, respectively. Bearing in mind the above, the detection of mycotoxin levels in amniotic fluid is useful for the estimation of overall risk characterization with an attempt to link the occurrence of fetal abnormalities with exposure to mycotoxins in utero.
Collapse
|
26
|
Ismail A, Naeem I, Gong YY, Routledge MN, Akhtar S, Riaz M, Ramalho LNZ, de Oliveira CAF, Ismail Z. Early life exposure to dietary aflatoxins, health impact and control perspectives: A review. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.04.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
27
|
Jolly PE, Mazariegos M, Contreras H, Balas N, Junkins A, Aina IO, Minott S, Wang M, Phillips TD. Aflatoxin Exposure Among Mothers and Their Infants from the Western Highlands of Guatemala. Matern Child Health J 2021; 25:1316-1325. [PMID: 33945085 DOI: 10.1007/s10995-021-03151-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVES We examined breast milk of mothers and urine of infants before and after introduction of supplementary foods for aflatoxin M1 (AFM1) and the association between AFM1 with maternal and infant diet. METHODS A prospective cohort study was conducted among mothers and infants ages 0-6 months and 7-12 months from June-October 2014. Sociodemographic, dietary, birth, and health data were collected. A breast milk sample was collected from each mother and a urine sample from each infant at baseline (time point 1) and monthly for 2 time points thereafter; samples collected at baseline and time point 3 were tested for AFM1. RESULTS Almost 5% of breast milk and 15.7% of urine samples tested AFM1-positive. The median AFM1 in breast milk was 0.020 ng/mL and in urine 0.077 ng/mg creatinine. At time point 3, infants of 5 of the 6 mothers in each group who were AFM1-positive in breast milk were also AFM1-positive in urine. Mothers' consumption of cooked maize/maize dough ≥ 3 days per week (OR 2.96, 95% CI = 1.19-7.34) and mothers' consumption of tamales made from maize ≥ 3 days per week (OR 0.28, 95% CI = 0.10-0.73) were significantly associated with AFM1 in infant urine. CONCLUSION This is the first study in Guatemala documenting aflatoxin exposure in both breast milk of lactating mothers and infants´ urine during the first year of life. This may have important implications in understanding the multicausality of the high rates of stunting among children < 5 years old in Guatemala.
Collapse
Affiliation(s)
- Pauline E Jolly
- Department of Epidemiology, School of Public Health, University of Alabama At Birmingham, 1665 University Blvd, Birmingham, AL, 35233, USA.
| | - Manolo Mazariegos
- Section of Nutrition and Micronutrients, Institute of Nutrition for Central America and Panamá (INCAP), Guatemala City, Guatemala
| | - Haglaeeh Contreras
- Department of Epidemiology, School of Public Health, University of Alabama At Birmingham, 1665 University Blvd, Birmingham, AL, 35233, USA
| | - Nora Balas
- Department of Epidemiology, School of Public Health, University of Alabama At Birmingham, 1665 University Blvd, Birmingham, AL, 35233, USA
| | - Anna Junkins
- Department of Epidemiology, School of Public Health, University of Alabama At Birmingham, 1665 University Blvd, Birmingham, AL, 35233, USA
| | - Ibironke O Aina
- Department of Epidemiology, School of Public Health, University of Alabama At Birmingham, 1665 University Blvd, Birmingham, AL, 35233, USA
| | - Selina Minott
- Department of Epidemiology, School of Public Health, University of Alabama At Birmingham, 1665 University Blvd, Birmingham, AL, 35233, USA
| | - Meichen Wang
- College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Timothy D Phillips
- College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA
| |
Collapse
|
28
|
Assessment of aflatoxins exposure through urinary biomarker approach and the evaluation of the impacts of aflatoxins exposure on the selected health parameters of the children of Multan city of Pakistan. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.107863] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
29
|
Andrews-Trevino JY, Webb P, Shively G, Kablan A, Baral K, Davis D, Paudel K, Shrestha R, Pokharel A, Acharya S, Wang JS, Xue KS, Ghosh S. Aflatoxin exposure and child nutrition: measuring anthropometric and long-bone growth over time in Nepal. Am J Clin Nutr 2021; 113:874-883. [PMID: 33677532 PMCID: PMC8023848 DOI: 10.1093/ajcn/nqaa397] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 11/24/2020] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Naturally occurring aflatoxins may contribute to poor growth and nutritional statuses in children. OBJECTIVES We analyzed the relationship between contemporary and lagged aflatoxin exposure and 1) length-for-age z-score (LAZ); and 2) length, knee-heel length, stunting, weight-for-age z-score (WAZ), and weight-for-length z-score (WLZ). METHODS We conducted a longitudinal birth cohort study involving 1675 mother-infant dyads in rural Nepal. Participants were repeatedly visited from pregnancy to 2 years of age (2015-2019). One blood sample was collected during pregnancy and 4 samples were collected from the children at 3, 6, 12, and 18-22 months of age to measure concentrations of aflatoxin B1 (AFB1)-lysine adduct. Multivariate linear fixed-effects and logistic models with generalized estimating equations were used to identify associations between child growth and aflatoxin exposure. RESULTS AFB1-lysine adducts were detected in the majority of children (at 3 months, 80.5%; at 6 months, 75.3%; at 12 months, 81.1%; and at 18-22 months, 85.1%) and in 94.3% of pregnant women. Changes in contemporary ln child AFB1-lysine adduct concentrations were significantly associated with changes in LAZ (β, -0.05; 95% CI, -0.09 to -0.02; P = 0.003), length (β, -0.19; 95% CI, -0.29 to -0.10; P < 0.001), knee-heel length (β, -0.09; 95% CI, -0.13 to -0.05; P < 0.001), and WAZ (β, -0.04; 95% CI, -0.07 to -0.005; P = 0.022). Serum aflatoxin concentrations were associated with stunting (OR, 1.18; 95% CI, 1.05-1.32; P = 0.005). Similar results were found in the models using changes in contemporary ln AFB1 adjusted for changes in child weight, with significant associations with changes in WLZ (β, -0.07; 95% CI, -0.10 to -0.03; P < 0.001). Changes in time-lagged ln AFB1 (unadjusted and adjusted for changes in child weight) were associated with changes in length and knee-heel length. CONCLUSIONS Our results add to the growing body of evidence confirming chronic aflatoxin exposure and suggest that exposure is significantly correlated with various negative growth outcomes, which may vary by child weight status. This trial was registered at clinicaltrials.gov as NCT03312049.
Collapse
Affiliation(s)
| | - Patrick Webb
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Gerald Shively
- Department of Agricultural Economics, Purdue University, West Lafayette, IN, USA
| | - Ahmed Kablan
- Bureau of Resilience and Food Security, United States Agency for International Development, Washington, DC, USA
| | - Kedar Baral
- Department of Community Health Sciences, Patan Academy of Health Sciences, Lalitpur, Nepal
| | - Dale Davis
- Helen Keller International-Nepal, Kathmandu, Nepal
| | | | - Robin Shrestha
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | | | | | - Jia-Sheng Wang
- Department of Environmental Health Science, University of Georgia, Athens, GA, USA
| | - Kathy S Xue
- Department of Environmental Health Science, University of Georgia, Athens, GA, USA
| | - Shibani Ghosh
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| |
Collapse
|
30
|
Ademola O, Saha Turna N, Liverpool-Tasie LSO, Obadina A, Wu F. Mycotoxin reduction through lactic acid fermentation: Evidence from commercial ogi processors in southwest Nigeria. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107620] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
31
|
Eshete M, Gebremedhin S, Alemayehu FR, Taye M, Boshe B, Stoecker BJ. Aflatoxin contamination of human breast milk and complementary foods in southern Ethiopia. MATERNAL AND CHILD NUTRITION 2020; 17:e13081. [PMID: 32954680 PMCID: PMC7729635 DOI: 10.1111/mcn.13081] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 08/13/2020] [Accepted: 09/03/2020] [Indexed: 12/15/2022]
Abstract
Exposure to unsafe level of aflatoxin in early life may lead to growth faltering. However, the extent of contamination of breast milk and complementary foods is poorly examined. We determined aflatoxin M1 (AFM1 ) and B1 (AFB1 ) contamination of human breast milk and cereal-based cooked complementary foods, respectively, among households having children 6-23 months of age in Sidama zone, southern Ethiopia. Data were collected through two cross-sectional surveys implemented in the wet (n = 180) and dry (n = 180) seasons. Eligible households (n = 360) were recruited from three agroecological zones (lowland, midland and highland, each with sample size of 120) using a multistage sampling technique. AFB1 and AFM1 levels were determined using enzyme-linked immunosorbent assay. Mann-Whitney U and Kruskal-Wallis tests were performed to compare aflatoxin levels between seasons and across the agroecological zones. Among 360 breast milk samples tested, 64.4% had detectable AFM1 and 5.3% exceeded the 0.025 parts per billion (ppb) limit set by the European Union for infant milk. The median AFM1 in the lowlands was significantly higher than in the other agroecological settings (P < 0.001). By season, AFM1 was higher in breast milk samples collected in the dry season (P = 0.041). AFB1 was detected in 96.4% of the food samples tested, and 95.0% had concentration exceeding the permissible European Union limit of 0.1 ppb. The median AFB1 was significantly higher in the lowland (P = 0.002), but there was no difference between the seasons (P = 0.386). The study indicated that, in southern Ethiopia, foods intended for infants are heavily contaminated with AFB1 . Contamination of breast milk is also a significant health concern.
Collapse
Affiliation(s)
- Mesfin Eshete
- School of Nutrition, Food Science and Technology, Hawassa University, Hawassa, Ethiopia
| | | | - Fikadu R Alemayehu
- School of Nutrition, Food Science and Technology, Hawassa University, Hawassa, Ethiopia
| | - Mestawet Taye
- School of Animal and Range Sciences, Hawassa University, Hawassa, Ethiopia
| | - Bergene Boshe
- School of Nutrition, Food Science and Technology, Hawassa University, Hawassa, Ethiopia
| | - Barbara J Stoecker
- College of Human Sciences, Oklahoma State University, Stillwater, Oklahoma, USA
| |
Collapse
|
32
|
Abstract
Pregnancy is not a disease condition; it is a physiological process. However, the risks prevail until this process ends. While many pregnancies and births culminate without any problems, a considerable number of them end up with undesirable pregnancy outcomes such as intrauterine growth retardation, preterm labor, and low birth weight infants. Although the causes of these negative pregnancy outcomes are not fully understood, they occur in a multifactorial ways. One of the important issues here is the foods consumed by women with pregnancy. Pregnant women should avoid consuming fast food products, alcohol, or tobacco, which are already known to be harmful to human health, as well as harmful natural products containing mycotoxins. Mycotoxins are natural toxins with a wide range of chemical structures. While people can get these toxins directly from agricultural products, they can also be exposed indirectly through products of animals fed with contaminated feed. Mycotoxins have negative impacts on human health with their carcinogenic, teratogenic, and mutagenic effects. There are some evidences that mycotoxins can lead to negative pregnancy outcomes. These possible negative effects have been determined to be lower birth weight, neonatal jaundice, fetal loss, fetal defects, preterm birth, maternal anemia, and preeclampsia. However, more evidence is needed on this topic. This review aims to investigate the adverse effects of mycotoxins during pregnancy.
Collapse
Affiliation(s)
| | | | - Serkan Yilmaz
- Faculty of Nursing, Department of Midwifery, University of Ankara, Ankara, Turkey.,Faculty of Health Sciences, University of Ankara, Ankara, Turkey
| |
Collapse
|
33
|
Lauer JM, Natamba BK, Ghosh S, Webb P, Wang JS, Griffiths JK. Aflatoxin exposure in pregnant women of mixed status of human immunodeficiency virus infection and rate of gestational weight gain: a Ugandan cohort study. Trop Med Int Health 2020; 25:1145-1154. [PMID: 32623795 PMCID: PMC7539974 DOI: 10.1111/tmi.13457] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Objectives To examine the association between aflatoxin (AF) exposure during pregnancy and rate of gestational weight gain (GWG) in a sample of pregnant women of mixed HIV status in Gulu, northern Uganda. Methods 403 pregnant women were included (133 HIV‐infected on antiretroviral therapy (ART), 270 HIV‐uninfected). Women’s weight, height and socio‐demographic characteristics were collected at baseline (~19 weeks’ gestation); weight was assessed at each follow‐up visit. Serum was collected at baseline and tested for aflatoxin B1‐lysine adduct (AFB‐lys) levels using high‐performance liquid chromatography (HPLC). Linear mixed‐effects models were used to examine the association between AFB‐lys levels and rate of GWG. Results AFB‐lys levels (detected in 98.3% of samples) were higher among HIV‐infected pregnant women than HIV‐uninfected pregnant women [median (interquartile range): 4.8 (2.0, 15.0) vs. 3.5 (1.6, 6.1) pg/mg of albumin, P < 0.0001]. Adjusting for HIV status, a one‐log increase in aflatoxin levels was associated with a 16.2 g per week lower rate of GWG (P = 0.028). The association between AFB‐lys and the rate of GWG was stronger and significant only among HIV‐infected women on ART [−25.7 g per week per log (AFB‐lys), P = 0.009 for HIV‐infected women vs. −7.5 g per week per log (AFB‐lys), P = 0.422 for HIV‐uninfected women]. Conclusions Pregnant women with higher levels of AF exposure had lower rates of GWG. The association was stronger for HIV‐infected women on ART, suggesting increased risk.
Collapse
Affiliation(s)
- Jacqueline M Lauer
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children's Hospital, Boston, MA, USA.,Feed the Future Innovation Lab for Nutrition, Tufts University, Boston, MA, USA
| | - Barnabas K Natamba
- MRC/UVRI and LSHTM Uganda Research Unit, Noncommunicable Diseases Theme, Entebbe, Uganda
| | - Shibani Ghosh
- Feed the Future Innovation Lab for Nutrition, Tufts University, Boston, MA, USA.,Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Patrick Webb
- Feed the Future Innovation Lab for Nutrition, Tufts University, Boston, MA, USA.,Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Jia-Sheng Wang
- Department of Environmental Health Science, University of Georgia, Athens, GA, USA
| | - Jeffrey K Griffiths
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA.,Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, MA, USA
| |
Collapse
|
34
|
Aflatoxin exposure was not associated with childhood stunting: results from a birth cohort study in a resource-poor setting of Dhaka, Bangladesh. Public Health Nutr 2020; 24:3361-3370. [PMID: 32618233 PMCID: PMC8314919 DOI: 10.1017/s1368980020001421] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE Chronic aflatoxin exposure has been associated with childhood stunting (length-for-age/height-for-age < -2 sd), while data lacks for Bangladesh, a country with substantial burden of childhood stunting. This paper examined the association between aflatoxin exposure and childhood stunting in a slum setting of Dhaka city. DESIGN In this MAL-ED aflatoxin birth cohort study, plasma samples were assayed for aflatoxin B1-lysine adduct (AFB1-lys) by MS at 7, 15, 24 and 36 months of age for 208, 196, 173 and 167 children to assess chronic aflatoxin exposure. Relationship between aflatoxin exposure and anthropometric measures was examined by mixed-effects logistic regression models. SETTING AND PARTICIPANTS The study was conducted in Mirpur, Dhaka, where children were followed from birth to 36 months. RESULTS Prevalence of stunting increased from 21 % at 7 months to 49 % at 36 months of age. Mean AFB1-lys concentrations at 7, 15, 24 and 36 months were 1·30 (range 0·09-5·79), 1·52 (range 0·06-6·35), 3·43 (range 0·15-65·60) and 3·70 (range 0·09-126·54) pg/mg albumin, respectively, and the percentage of children with detectable AFB1-lys was 10, 21, 18 and 62 %, respectively. No association was observed between aflatoxin exposure and stunting in multivariable analyses. Factors associated with childhood stunting were age, low birth weight, maternal height, stool myeloperoxidase and number of people sleeping in one room. CONCLUSIONS A relatively lower exposure to aflatoxin may not influence the linear growth of children. This finding indicates a threshold level of exposure for linear growth deficit and further investigation in other areas where higher concentrations of aflatoxin exposure exist.
Collapse
|
35
|
Visser ME, Schoonees A, Ezekiel CN, Randall NP, Naude CE. Agricultural and nutritional education interventions for reducing aflatoxin exposure to improve infant and child growth in low- and middle-income countries. Cochrane Database Syst Rev 2020; 4:CD013376. [PMID: 32270495 PMCID: PMC7141997 DOI: 10.1002/14651858.cd013376.pub2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Aflatoxins are carcinogenic mycotoxins that contaminate many food crops. Maize and groundnuts are prone to aflatoxin contamination, and are the major sources of human exposure to aflatoxins, due to their high intake as staple foods, particularly in low- and middle-income countries (LMICs). Observational studies suggest an association between dietary exposure to aflatoxins during pregnancy and early childhood and linear growth in infants and young children. OBJECTIVES To assess the effects on pre- and postnatal growth outcomes when agricultural and nutritional education interventions during the post-harvest period that aim to reduce aflatoxin exposure are compared to usual support or no intervention. We assessed this in infants, children, and pregnant and lactating women at the household or community level in LMICs. SEARCH METHODS In July and August 2019, we searched: CENTRAL, MEDLINE, Embase, CINAHL, Web of Science Core Collection, Africa-Wide, LILACS, CAB Abstracts, Agricola, and two trials registers. We also checked the bibliographies of the included studies and contacted relevant mycotoxin organisations and researchers for additional studies. SELECTION CRITERIA We included randomised controlled trials (RCTs) and cluster-RCTs of agricultural education and nutritional education interventions of any duration, at the household or community level, aimed at reducing aflatoxin intake by infants, children, and pregnant and lactating women, in LMICs during the post-harvest period, compared to no intervention or usual support. We excluded studies that followed participants for less than four weeks. We assessed prespecified prenatal (at birth) and postnatal growth outcomes (during infancy, childhood, and adolescence), with linear growth (as the primary outcome), infectious disease morbidity, and unintended consequences. DATA COLLECTION AND ANALYSIS Two authors independently assessed study eligibility using prespecified criteria, extracted data, and assessed risk of bias of included RCTs. We evaluated the certainty of the evidence using GRADE, and presented the main results in a 'Summary of findings' table. MAIN RESULTS We included three recent cluster-RCTs reporting the effects of agricultural education plus post-harvest technologies, compared to usual agricultural support or no intervention. The participants were pregnant women and their children, lactating women and their infants (< 6 months), women of childbearing age, and young children (< 59 months), from rural, subsistence maize-farming communities in Kenya, Zimbabwe, and Tanzania. Two trials randomised villages to the intervention and control groups, including a total of at least 979 mother-child pairs from 60 villages. The third trial randomised 420 households, including 189 mother-child pairs and 231 women of childbearing age. Duration of the intervention and follow-up ranged between five and nine months. Due to risk of attrition bias, the overall risk of bias was unclear in one trial, and high in the other two trials. None of the included studies addressed the effects of nutritional education on pre- and postnatal growth. One trial reported outcomes not prespecified in our review, and we were unable to obtain unpublished growth data from the second trial, even after contacting the authors. The third trial, in lactating women and their infants in Tanzania, reported on the infants' weight-for-age z-score (WAZ) after six months. This trial found that providing agricultural education aimed at changing farmers' post-harvest practices to reduce aflatoxin exposure, by using demonstrations (e.g. handsorting, de-hulling of maize, drying sheets, and insecticides), may improve WAZ in infants from these farmers' households, on average, by 0.57 (95% confidence interval (CI) 0.16 to 0.98; 1 study; 249 participants; very low-certainty evidence), compared to infants from households where the farmers received routine agricultural extension services. Another way of reporting the effect on WAZ is to compare the proportion of underweight infants (WAZ > 2 SD below the reference median value) per group. This trial found that the intervention may reduce the proportion of underweight infants in the intervention households by 6.7% (95% CI -12.6 to -1.4; 249 participants; very low-certainty evidence) compared to control households. No studies reported on unintended effects of agricultural and nutritional education. AUTHORS' CONCLUSIONS Evidence on the effects on child growth in LMICs of agricultural or nutritional education interventions that reduce aflatoxin exposure was very limited; no included study reported on linear growth. Very low-certainty evidence suggested that agricultural education aimed at changing farmers' post-harvest practices to reduce aflatoxin exposure by using demonstrations, may result in an increase in WAZ, when compared to usual or no education.
Collapse
Affiliation(s)
- Marianne E Visser
- Stellenbosch UniversityCentre for Evidence‐based Health Care, Division of Epidemiology and Biostatistics, Faculty of Medicine and Health SciencesCape TownSouth Africa
| | - Anel Schoonees
- Stellenbosch UniversityCentre for Evidence‐based Health Care, Division of Epidemiology and Biostatistics, Faculty of Medicine and Health SciencesCape TownSouth Africa
| | - Chibundu N Ezekiel
- Babcock UniversityDepartment of MicrobiologyIlishan RemoOgun StateNigeria
| | - Nicola P Randall
- Harper Adams UniversityCrop and Environmental SciencesNewportShropshireUK
| | - Celeste E Naude
- Stellenbosch UniversityCentre for Evidence‐based Health Care, Division of Epidemiology and Biostatistics, Faculty of Medicine and Health SciencesCape TownSouth Africa
| | | |
Collapse
|
36
|
Passarelli S, Bromage S, Darling AM, Wang J, Aboud S, Mugusi F, Griffiths JK, Fawzi W. Aflatoxin exposure in utero and birth and growth outcomes in Tanzania. MATERNAL & CHILD NUTRITION 2020; 16:e12917. [PMID: 31823516 PMCID: PMC7083471 DOI: 10.1111/mcn.12917] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 10/03/2019] [Accepted: 10/31/2019] [Indexed: 01/09/2023]
Abstract
Some evidence suggests that aflatoxin may contribute to the high prevalence of stunting observed in low-income countries. Whereas several studies have been conducted in West Africa, fewer exist in East Africa and even fewer in nonagricultural contexts. We analyzed serum samples from 400 iron-replete, nonanemic pregnant women from a cohort in Dar es Salaam, Tanzania to determine the extent and magnitude of exposure to aflatoxin and to study the relationship between levels of aflatoxin exposure in utero and infant birth and growth outcomes. Ninety-nine percent of women had detectable concentrations of aflatoxin B1-lysine (AFB1-lysine), with a median level of 1.4-pg/mg albumin, indicating a much lower level compared to studies of rural populations in sub-Saharan Africa. Our results do not show a statistically significant relationship between AFB1-lysine levels and birth weight, small for gestational age, or prematurity. We observe a small statistically significant reduction in gestational age at delivery (0.47 weeks; 95% CI: -0.86, -0.07) as the natural log of AFB1-lysine levels increases by 1 unit of pg/mg of albumin, after controlling for potential confounders. Among a nonrandom set of infants who had measurements for placental weight, haemoglobin at delivery, and follow-up z-score measurements, we find no association between aflatoxin plasma concentrations and these variables. These findings suggest a high prevalence of chronic low-level exposure to aflatoxin, though its effect on birth outcomes in this population remains unclear. Our research adds to a growing body of literature finding mixed associations between aflatoxins on pregnancy outcomes and child growth.
Collapse
Affiliation(s)
- Simone Passarelli
- Department of NutritionHarvard T.H. Chan School of Public HealthBostonMassachusetts
| | - Sabri Bromage
- Department of NutritionHarvard T.H. Chan School of Public HealthBostonMassachusetts
| | - Anne Marie Darling
- Department of Global Health and PopulationHarvard T.H. Chan School of Public HealthBostonMassachusetts
| | - Jia‐Sheng Wang
- Department of Environmental Health ScienceUniversity of GeorgiaAthensGeorgia
| | - Said Aboud
- Department of Microbiology and ImmunologyMuhimbili University of Health and Allied SciencesSalaamTanzania
| | - Ferdinand Mugusi
- Department of Internal MedicineMuhimbili University of Health and Allied SciencesSalaamTanzania
| | - Jeffrey K. Griffiths
- Department of Public Health and Community MedicineTufts University School of MedicineBostonMassachusetts
| | - Wafaie Fawzi
- Department of NutritionHarvard T.H. Chan School of Public HealthBostonMassachusetts
- Department of Global Health and PopulationHarvard T.H. Chan School of Public HealthBostonMassachusetts
- Department of EpidemiologyHarvard T.H. Chan School of Public HealthBostonMassachusetts
| |
Collapse
|
37
|
Schrenk D, Bignami M, Bodin L, Chipman JK, del Mazo J, Grasl‐Kraupp B, Hogstrand C, Hoogenboom L(R, Leblanc J, Nebbia CS, Nielsen E, Ntzani E, Petersen A, Sand S, Schwerdtle T, Vleminckx C, Marko D, Oswald IP, Piersma A, Routledge M, Schlatter J, Baert K, Gergelova P, Wallace H. Risk assessment of aflatoxins in food. EFSA J 2020; 18:e06040. [PMID: 32874256 PMCID: PMC7447885 DOI: 10.2903/j.efsa.2020.6040] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
EFSA was asked to deliver a scientific opinion on the risks to public health related to the presence of aflatoxins in food. The risk assessment was confined to aflatoxin B1 (AFB1), AFB2, AFG1, AFG2 and AFM1. More than 200,000 analytical results on the occurrence of aflatoxins were used in the evaluation. Grains and grain-based products made the largest contribution to the mean chronic dietary exposure to AFB1 in all age classes, while 'liquid milk' and 'fermented milk products' were the main contributors to the AFM1 mean exposure. Aflatoxins are genotoxic and AFB1 can cause hepatocellular carcinomas (HCCs) in humans. The CONTAM Panel selected a benchmark dose lower confidence limit (BMDL) for a benchmark response of 10% of 0.4 μg/kg body weight (bw) per day for the incidence of HCC in male rats following AFB1 exposure to be used in a margin of exposure (MOE) approach. The calculation of a BMDL from the human data was not appropriate; instead, the cancer potencies estimated by the Joint FAO/WHO Expert Committee on Food Additives in 2016 were used. For AFM1, a potency factor of 0.1 relative to AFB1 was used. For AFG1, AFB2 and AFG2, the in vivo data are not sufficient to derive potency factors and equal potency to AFB1 was assumed as in previous assessments. MOE values for AFB1 exposure ranged from 5,000 to 29 and for AFM1 from 100,000 to 508. The calculated MOEs are below 10,000 for AFB1 and also for AFM1 where some surveys, particularly for the younger age groups, have an MOE below 10,000. This raises a health concern. The estimated cancer risks in humans following exposure to AFB1 and AFM1 are in-line with the conclusion drawn from the MOEs. The conclusions also apply to the combined exposure to all five aflatoxins.
Collapse
|
38
|
Kyei NNA, Boakye D, Gabrysch S. Maternal mycotoxin exposure and adverse pregnancy outcomes: a systematic review. Mycotoxin Res 2020; 36:243-255. [PMID: 31989413 PMCID: PMC7182542 DOI: 10.1007/s12550-019-00384-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 12/18/2019] [Accepted: 12/20/2019] [Indexed: 11/29/2022]
Abstract
Mycotoxin exposure from food occurs globally but is more common in hot humid environments, especially in low-income settings, and might affect pregnancy outcomes. This study aimed to synthesize the evidence from epidemiological studies on the relationship between maternal or fetal exposure to different mycotoxins and the occurrence of adverse pregnancy outcomes. Multiple databases were systematically searched up to December 2018 to identify studies that assessed the association between mycotoxin exposure in pregnant women or fetuses and at least one pregnancy outcome. Studies were appraised and results were synthesized using standard methods for conducting systematic reviews. This review identified and included 17 relevant studies. There is some evidence to suggest that exposure to various Aspergillus mycotoxins (e.g., aflatoxin) during pregnancy may impair intrauterine fetal growth and promote neonatal jaundice. Findings were inconclusive concerning the influence of aflatoxin exposure on perinatal death and preterm birth. Only two studies assessed effects of maternal exposure to Fusarium mycotoxins (e.g., fumonisin) on adverse pregnancy outcomes. These studies found that maternal fumonisin exposure may be associated with hypertensive emergencies in pregnancy and with neural tube defects. Studies using grain farming and weather conditions as a proxy measure for mycotoxin exposure found that such exposure was associated with an increased risk of preterm birth and late-term miscarriage. In conclusion, there is already some evidence to suggest that exposure to mycotoxins during pregnancy may have detrimental effects on pregnancy outcomes. However, given the limited number of studies, especially on effects of Fusarium mycotoxins, more studies are needed for a more comprehensive understanding of the effects of different mycotoxins on maternal and fetal health and to guide public health policies and interventions.
Collapse
Affiliation(s)
- Nicholas N A Kyei
- Unit of Epidemiology and Biostatistics, Heidelberg Institute of Global Health, Heidelberg University, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany. .,Public Health Division, 37 Military Hospital, Accra, Ghana.
| | - Daniel Boakye
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 581, 69120, Heidelberg, Germany
| | - Sabine Gabrysch
- Unit of Epidemiology and Biostatistics, Heidelberg Institute of Global Health, Heidelberg University, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany.,Research Department 2, Potsdam Institute for Climate Impact Research, Potsdam, Germany.,Institute of Public Health, Charité - Universitätsmedizin Berlin, Berlin, Germany
| |
Collapse
|
39
|
Joubert BR, Mantooth SN, McAllister KA. Environmental Health Research in Africa: Important Progress and Promising Opportunities. Front Genet 2020; 10:1166. [PMID: 32010175 PMCID: PMC6977412 DOI: 10.3389/fgene.2019.01166] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 10/23/2019] [Indexed: 12/16/2022] Open
Abstract
The World Health Organization in 2016 estimated that over 20% of the global disease burden and deaths were attributed to modifiable environmental factors. However, data clearly characterizing the impact of environmental exposures and health endpoints in African populations is limited. To describe recent progress and identify important research gaps, we reviewed literature on environmental health research in African populations over the last decade, as well as research incorporating both genomic and environmental factors. We queried PubMed for peer-reviewed research articles, reviews, or books examining environmental exposures and health outcomes in human populations in Africa. Searches utilized medical subheading (MeSH) terms for environmental exposure categories listed in the March 2018 US National Report on Human Exposure to Environmental Chemicals, which includes chemicals with worldwide distributions. Our search strategy retrieved 540 relevant publications, with studies evaluating health impacts of ambient air pollution (n=105), indoor air pollution (n = 166), heavy metals (n = 130), pesticides (n = 95), dietary mold (n = 61), indoor mold (n = 9), per- and polyfluoroalkyl substances (PFASs, n = 0), electronic waste (n = 9), environmental phenols (n = 4), flame retardants (n = 8), and phthalates (n = 3), where publications could belong to more than one exposure category. Only 23 publications characterized both environmental and genomic risk factors. Cardiovascular and respiratory health endpoints impacted by air pollution were comparable to observations in other countries. Air pollution exposures unique to Africa and some other resource limited settings were dust and specific occupational exposures. Literature describing harmful health effects of metals, pesticides, and dietary mold represented a context unique to Africa. Studies of exposures to phthalates, PFASs, phenols, and flame retardants were very limited. These results underscore the need for further focus on current and emerging environmental and chemical health risks as well as better integration of genomic and environmental factors in African research studies. Environmental exposures with distinct routes of exposure, unique co-exposures and co-morbidities, combined with the extensive genomic diversity in Africa may lead to the identification of novel mechanisms underlying complex disease and promising potential for translation to global public health.
Collapse
Affiliation(s)
- Bonnie R Joubert
- National Institute of Environmental Health Sciences, National Institutes of Health, Durham, NC, United States
| | | | - Kimberly A McAllister
- National Institute of Environmental Health Sciences, National Institutes of Health, Durham, NC, United States
| |
Collapse
|
40
|
Benkerroum N. Chronic and Acute Toxicities of Aflatoxins: Mechanisms of Action. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E423. [PMID: 31936320 PMCID: PMC7013914 DOI: 10.3390/ijerph17020423] [Citation(s) in RCA: 171] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 12/23/2019] [Accepted: 12/29/2019] [Indexed: 01/01/2023]
Abstract
There are presently more than 18 known aflatoxins most of which have been insufficiently studied for their incidence, health-risk, and mechanisms of toxicity to allow effective intervention and control means that would significantly and sustainably reduce their incidence and adverse effects on health and economy. Among these, aflatoxin B1 (AFB1) has been by far the most studied; yet, many aspects of the range and mechanisms of the diseases it causes remain to be elucidated. Its mutagenicity, tumorigenicity, and carcinogenicity-which are the best known-still suffer from limitations regarding the relative contribution of the oxidative stress and the reactive epoxide derivative (Aflatoxin-exo 8,9-epoxide) in the induction of the diseases, as well as its metabolic and synthesis pathways. Additionally, despite the well-established additive effects for carcinogenicity between AFB1 and other risk factors, e.g., hepatitis viruses B and C, and the hepatotoxic algal microcystins, the mechanisms of this synergy remain unclear. This study reviews the most recent advances in the field of the mechanisms of toxicity of aflatoxins and the adverse health effects that they cause in humans and animals.
Collapse
Affiliation(s)
- Noreddine Benkerroum
- Department of Food Science and Agricultural Chemistry MacDonald Campus, McGill University, 21111 Lakeshore, Ste Anne de Bellevue, QC H9X 3V9, Canada
| |
Collapse
|
41
|
Monda E, Masanga J, Alakonya A. Variation in Occurrence and Aflatoxigenicity of Aspergillus flavus from Two Climatically Varied Regions in Kenya. Toxins (Basel) 2020; 12:toxins12010034. [PMID: 31935922 PMCID: PMC7020432 DOI: 10.3390/toxins12010034] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 12/11/2019] [Accepted: 12/26/2019] [Indexed: 02/01/2023] Open
Abstract
Aflatoxins are carcinogenic chemical metabolites produced by Aspergillus spp. of the section Flavi. In Kenya, Aspergillus flavus is the most prevalent and has been associated with several acute and chronic aflatoxin outbreaks in the past. In this study, we evaluated the occurrence of A. flavus in soils from two agro-ecological regions with contrasting climatic conditions, aflatoxin contamination histories and cropping systems. Aspergillus spp. were first isolated from soils before the identification and determination of their aflatoxigenicity. Further, we determined the occurrence of Pseudomonas and Bacillus spp. in soils from the two regions. These bacterial species have long been associated with biological control of several plant pathogens including Aspergillus spp. Our results show that A. flavus occurred widely and produced comparatively higher total aflatoxin levels in all (100%) study sites from the eastern to the western regions of Kenya. For the western region, A. flavus was detected in 4 locations (66.7%) that were previously under maize cultivation with the isolates showing low aflatoxigenicity. A. flavus was not isolated from soils under sugarcane cultivation. Distribution of the two bacterial species varied across the regions but we detected a weak relationship between occurrence of bacterial species and A. flavus. We discuss these findings in the context of the influence of climate, microbial profiles, cropping systems and applicability in the deployment of biological control remedies against aflatoxin contamination.
Collapse
Affiliation(s)
- Ethel Monda
- Department of Biochemistry, Biotechnology and Microbiology, Kenyatta University, Thika Road, Nairobi P.O. Box 43844-00100, Kenya; (E.M.); (J.M.)
| | - Joel Masanga
- Department of Biochemistry, Biotechnology and Microbiology, Kenyatta University, Thika Road, Nairobi P.O. Box 43844-00100, Kenya; (E.M.); (J.M.)
| | - Amos Alakonya
- Seed Health Unit, Genetic Resources Program, International Maize and Wheat Improvement Center (CIMMYT), Carretera Mexico-Veracruz Km. 45 El Batan, Texcoco, Mexico C.P. 56237, Mexico
- Correspondence:
| |
Collapse
|
42
|
Matumba L, Kimanya M, Chunga-Sambo W, Munthali M, Ayalew A. Probabilistic dietary based estimation of the burden of aflatoxin-induced hepatocellular carcinoma among adult Malawians. WORLD MYCOTOXIN J 2019. [DOI: 10.3920/wmj2018.2346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The risk of aflatoxin-induced hepatocellular carcinoma (HCC) among adults (average body weight of 60 kg) in Malawi was assessed based on aflatoxin B1 (AFB1) exposure through groundnut and maize consumption, by Monte Carlo simulation. The risk (cases per year per 100,000 people) of aflatoxin-induced HCC was estimated based on the AFB1 exposures estimated by this study and hepatitis B virus infection prevalence published for Malawi. AFB1 exposures were estimated by probabilistically combining data of AFB1 contamination in 338 groundnut and 604 maize samples with data of per capita groundnut and maize consumption in 274 households. Aflatoxins in the samples were analysed using validated LC-MS/MS, HPLC and VICAM based methods. The groundnut and maize consumption survey was based on household expenditure technique. The simulated mean AFB1 exposures through consumption of groundnuts, maize, and combination thereof were 28±65, 42±174, and 71±211 ng/kg. body weight (bw)/day, respectively. The estimated HCC risks were 1.26±2.72, 1.86±6.66 and 3.10±6.85 cases per 100,000 persons per year, respectively. Further, hypothetical eradication of hepatitis B virus (HBV) reduced the risk of HCC by 78%. This reaffirms the need for integrating HBV vaccination in the fight of aflatoxin induced HCC.
Collapse
Affiliation(s)
- L. Matumba
- Food Technology and Nutrition Group, Lilongwe University of Agriculture and Natural Resources, (LUANAR), NRC campus, P.O. Box 143, Lilongwe, Malawi
| | - M. Kimanya
- The Partnership for Aflatoxin Control in Africa, Department of Rural Economy and Agriculture, P.O. Box 3243, Roosevelt Street, Addis Ababa, Ethiopia
- Department of Food Biotechnology and Nutritional Sciences, Nelson Mandela – African Institution of Science and Technology, Arusha, Tanzania
| | - W. Chunga-Sambo
- The Partnership for Aflatoxin Control in Africa, Department of Rural Economy and Agriculture, P.O. Box 3243, Roosevelt Street, Addis Ababa, Ethiopia
| | - M. Munthali
- Department of Agricultural Research Services, Chitedze Agricultural Research Station, P.O. Box 158, Lilongwe, Malawi
| | - A. Ayalew
- The Partnership for Aflatoxin Control in Africa, Department of Rural Economy and Agriculture, P.O. Box 3243, Roosevelt Street, Addis Ababa, Ethiopia
| |
Collapse
|
43
|
Tesfamariam K, De Boevre M, Kolsteren P, Belachew T, Mesfin A, De Saeger S, Lachat C. Dietary mycotoxins exposure and child growth, immune system, morbidity, and mortality: a systematic literature review. Crit Rev Food Sci Nutr 2019; 60:3321-3341. [PMID: 31694387 DOI: 10.1080/10408398.2019.1685455] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The aim of this study was to systematically review associations between dietary mycotoxins exposure and child growth and morbidity of children aged 5 years or younger. Peer-reviewed literature was searched in MEDLINE, EMBASE, COCHRANE, CINAHL, Web of Science, and PsycINFO. Experimental and observational studies were considered. The exposures were dietary mycotoxins during pregnancy, lactation and childhood, and mycotoxins concentrations in the diet, breast milk, urine, and blood. From a total of 4869 references, 86 full-text papers were extracted of which 50 were included in this review. The methodological quality and risk of bias were evaluated and quality of the collective evidence was assessed using GRADE. Uncertainty remains whether mycotoxins exposure affects child growth, immunity and mortality and the overall quality of the evidence is very low. Overall however, we cannot rule out a possible association between dietary mycotoxins, in particular, AF and FUM and child malnutrition. Our analyses were limited by the reporting quality, difference in findings, heterogeneity of outcomes, mycotoxins detection methods, and the observational nature of most studies. Robust study designs with adequate sample size, use of validated biomarkers of exposure and assessment of co-occurrence of mycotoxins and their synergistic effects are required to provide the further evidence regarding a potential effect of dietary mycotoxins exposure on child growth and immunity.
Collapse
Affiliation(s)
- Kokeb Tesfamariam
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.,College of Medicine and Health Sciences, Department of Public Health, Ambo University, Ambo, Ethiopia.,Department of Population and Family Health, Faculty of Public Health, Jimma University, Jimma, Ethiopia
| | - Marthe De Boevre
- Center of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Patrick Kolsteren
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Tefera Belachew
- Department of Population and Family Health, Faculty of Public Health, Jimma University, Jimma, Ethiopia
| | - Addisalem Mesfin
- Department of Population and Family Health, Faculty of Public Health, Jimma University, Jimma, Ethiopia.,Center of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,Department of Human Nutrition, College of Agriculture, Hawassa University, Hawassa, Ethiopia
| | - Sarah De Saeger
- Center of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Carl Lachat
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| |
Collapse
|
44
|
Gaikpa DS, Miedaner T. Genomics-assisted breeding for ear rot resistances and reduced mycotoxin contamination in maize: methods, advances and prospects. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2019; 132:2721-2739. [PMID: 31440772 DOI: 10.1007/s00122-019-03412-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 08/13/2019] [Indexed: 05/26/2023]
Abstract
Genetic mapping, genomic profiling and bioinformatic approaches were used to identify putative resistance genes for ear rots and low mycotoxin contamination in maize. Genomic selection seems to have good perspectives. Maize is globally an indispensable crop for humans and livestock. About 30% of yield is lost by fungal diseases with Gibberella, Fusarium and Aspergillus ear rots (ERs) having a high economic impact in most maize-growing regions of the world. They reduce not only yield, but also contaminate grains with mycotoxins like deoxynivalenol, zearalenone, fumonisins and aflatoxins, respectively. These mycotoxins pose serious health problems to humans and animals. A number of studies have been conducted to dissect the genetic architecture of resistance to these three major ear rots over the past decade. The review concentrates on studies carried out to locate quantitative trait loci (QTL) and candidate genes (CG) on the maize genome as well as the application of genomic selection in maize for resistance against Fusarium graminearum, Fusarium verticillioides and Aspergillus flavus. QTL studies by linkage or genome-wide association mapping, omic technologies (genomics, proteomics, transcriptomics and metabolomics) and bioinformatics are the methods used in the current studies to propose resistance genes against ear rot pathogens. Though a number of QTL and CG are reported, only a few specific genes were found to directly confer ER resistance in maize. A combination of two or more gene identification methods would provide a more powerful and reliable tool. Genomic selection seems to be promising for ER resistance breeding, but there are only a limited number of studies in this area. A strategy that can accurately validate and predict genotypes with major effect QTL and CG for selection will be worthwhile for practical breeding against ERs and mycotoxin contamination in maize.
Collapse
Affiliation(s)
- David Sewordor Gaikpa
- State Plant Breeding Institute, University of Hohenheim, Fruwirthstr. 21, 70599, Stuttgart, Germany
| | - Thomas Miedaner
- State Plant Breeding Institute, University of Hohenheim, Fruwirthstr. 21, 70599, Stuttgart, Germany.
| |
Collapse
|
45
|
Andrews-Trevino JY, Webb P, Shively G, Rogers BL, Baral K, Davis D, Paudel K, Pokharel A, Shrestha R, Wang JS, Ghosh S. Relatively Low Maternal Aflatoxin Exposure Is Associated with Small-for-Gestational-Age but Not with Other Birth Outcomes in a Prospective Birth Cohort Study of Nepalese Infants. J Nutr 2019; 149:1818-1825. [PMID: 31198947 DOI: 10.1093/jn/nxz122] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 05/09/2019] [Accepted: 05/13/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Exposure to aflatoxin has garnered increased attention as a possible contributor to adverse birth outcomes. OBJECTIVE The objective of this study was to investigate the relation of maternal aflatoxin exposure with adverse birth outcomes such as birth weight, birth length, anthropometric z scores, low birth weight (LBW), small-for-gestational-age (SGA), stunting, and preterm birth (PTB). METHODS This study used maternal and newborn data from the AflaCohort Study, an ongoing birth cohort study in Banke, Nepal (n = 1621). Data on aflatoxin B1 (AFB1)-lysine adducts in maternal serum were collected once during pregnancy (at mean ± SD: 136 ± 43 d of gestation). Maternal serum AFB1-lysine adduct concentration was measured via HPLC. Linear and logistic regression analyses were used to determine if maternal aflatoxin exposure was associated with 1) birth weight and length (primary outcomes) and 2) anthropometric z scores, LBW (weight <2.5 kg), SGA (weight <10th percentile for gestational age and sex), stunting at birth (length-for-age z score less than -2), or PTB (born <37 weeks of gestation) (secondary outcomes). RESULTS The geometric mean of maternal serum AFB1-lysine adduct concentration was 1.37 pg/mg albumin (95% CI: 1.30, 1.44 pg/mg albumin). Twenty percent of infants were of LBW and 32% were SGA. Sixteen percent of infants were stunted at birth. In addition, 13% of infants were born preterm. In logistic multivariate regression models, mean maternal serum AFB1-lysine adduct concentrations were significantly associated with SGA (OR: 1.13; 95% CI: 1.00, 1.27; P < 0.05). CONCLUSIONS Findings from this study suggest a small but significant association between serum AFB1-lysine adduct concentrations in pregnant women and SGA. Maternal aflatoxin exposure was not associated with other birth outcomes. These results highlight the need for future research on a threshold level of aflatoxin exposure needed to produce detectable adverse birth outcomes. This trial was registered at clinicaltrials.gov as NCT03312049.
Collapse
Affiliation(s)
| | - Patrick Webb
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Gerald Shively
- Department of Agricultural Economics, Purdue University, West Lafayette, IN, USA
| | - Beatrice L Rogers
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Kedar Baral
- Department of Community Health Sciences, Patan Academy of Health Sciences, Lalitpur, Nepal
| | - Dale Davis
- Helen Keller International-Nepal, Kathmandu, Nepal
| | | | | | - Robin Shrestha
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Jia-Sheng Wang
- Department of Environmental Health Science, University of Georgia, Athens, GA, USA
| | - Shibani Ghosh
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| |
Collapse
|
46
|
Agbetiameh D, Ortega-Beltran A, Awuah RT, Atehnkeng J, Islam MS, Callicott KA, Cotty PJ, Bandyopadhyay R. Potential of Atoxigenic Aspergillus flavus Vegetative Compatibility Groups Associated With Maize and Groundnut in Ghana as Biocontrol Agents for Aflatoxin Management. Front Microbiol 2019; 10:2069. [PMID: 31555251 PMCID: PMC6743268 DOI: 10.3389/fmicb.2019.02069] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 08/22/2019] [Indexed: 11/24/2022] Open
Abstract
Increasing knowledge of the deleterious health and economic impacts of aflatoxin in crop commodities has stimulated global interest in aflatoxin mitigation. Current evidence of the incidence of Aspergillus flavus isolates belonging to vegetative compatibility groups (VCGs) lacking the ability to produce aflatoxins (i.e., atoxigenic) in Ghana may lead to the development of an aflatoxin biocontrol strategy to mitigate crop aflatoxin content. In this study, 12 genetically diverse atoxigenic African A. flavus VCGs (AAVs) were identified from fungal communities associated with maize and groundnut grown in Ghana. Representative isolates of the 12 AAVs were assessed for their ability to inhibit aflatoxin contamination by an aflatoxin-producing isolate in laboratory assays. Then, the 12 isolates were evaluated for their potential as biocontrol agents for aflatoxin mitigation when included in three experimental products (each containing four atoxigenic isolates). The three experimental products were evaluated in 50 maize and 50 groundnut farmers' fields across three agroecological zones (AEZs) in Ghana during the 2014 cropping season. In laboratory assays, the atoxigenic isolates reduced aflatoxin biosynthesis by 87-98% compared to grains inoculated with the aflatoxin-producing isolate alone. In field trials, the applied isolates moved to the crops and had higher (P < 0.05) frequencies than other A. flavus genotypes. In addition, although at lower frequencies, most atoxigenic genotypes were repeatedly found in untreated crops. Aflatoxin levels in treated crops were lower by 70-100% in groundnut and by 50-100% in maize (P < 0.05) than in untreated crops. Results from the current study indicate that combined use of appropriate, well-adapted isolates of atoxigenic AAVs as active ingredients of biocontrol products effectively displace aflatoxin producers and in so doing limit aflatoxin contamination. A member each of eight atoxigenic AAVs with superior competitive potential and wide adaptation across AEZs were selected for further field efficacy trials in Ghana. A major criterion for selection was the atoxigenic isolate's ability to colonize soils and grains after release in crop field soils. Use of isolates belonging to atoxigenic AAVs in biocontrol management strategies has the potential to improve food safety, productivity, and income opportunities for smallholder farmers in Ghana.
Collapse
Affiliation(s)
- Daniel Agbetiameh
- International Institute of Tropical Agriculture, Ibadan, Nigeria
- Department of Crop and Soil Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | | | - Richard T. Awuah
- Department of Crop and Soil Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Joseph Atehnkeng
- International Institute of Tropical Agriculture, Ibadan, Nigeria
| | - Md-Sajedul Islam
- Agricultural Research Service, United States Department of Agriculture, Tucson, AZ, United States
| | - Kenneth A. Callicott
- Agricultural Research Service, United States Department of Agriculture, Tucson, AZ, United States
| | - Peter J. Cotty
- Agricultural Research Service, United States Department of Agriculture, Tucson, AZ, United States
| | | |
Collapse
|
47
|
Visser ME, Ezekiel CN, Schoonees A, Esterhuizen TM, Randall N, Naude CE. Agricultural and nutritional educational interventions for reducing aflatoxin exposure to improve infant and child growth in low- and middle-income countries. Hippokratia 2019. [DOI: 10.1002/14651858.cd013376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Marianne E Visser
- Stellenbosch University; Centre for Evidence-based Health Care, Division of Epidemiology and Biostatistics, Faculty of Medicine and Health Sciences; Cape Town South Africa
| | - Chibundu N Ezekiel
- Babcock University; Department of Microbiology; Ilishan Remo Ogun State Nigeria
| | - Anel Schoonees
- Stellenbosch University; Centre for Evidence-based Health Care, Division of Epidemiology and Biostatistics, Faculty of Medicine and Health Sciences; Cape Town South Africa
| | - Tonya M Esterhuizen
- Stellenbosch University; Centre for Evidence-based Health Care, Division of Epidemiology and Biostatistics, Faculty of Medicine and Health Sciences; Cape Town South Africa
| | - Nicola Randall
- Harper Adams University; Crop and Environmental Sciences; Newport Shropshire UK
| | - Celeste E Naude
- Stellenbosch University; Centre for Evidence-based Health Care, Division of Epidemiology and Biostatistics, Faculty of Medicine and Health Sciences; Cape Town South Africa
| |
Collapse
|
48
|
Lauer JM, Duggan CP, Ausman LM, Griffiths JK, Webb P, Wang J, Xue KS, Agaba E, Nshakira N, Ghosh S. Maternal aflatoxin exposure during pregnancy and adverse birth outcomes in Uganda. MATERNAL & CHILD NUTRITION 2019; 15:e12701. [PMID: 30242967 PMCID: PMC6519241 DOI: 10.1111/mcn.12701] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 09/05/2018] [Accepted: 09/15/2018] [Indexed: 11/29/2022]
Abstract
Aflatoxins are toxic metabolites of Aspergillus moulds and are widespread in the food supply, particularly in low- and middle-income countries. Both in utero and infant exposure to aflatoxin B1 (AFB1 ) have been linked to poor child growth and development. The objective of this prospective cohort study was to investigate the association between maternal aflatoxin exposure during pregnancy and adverse birth outcomes, primarily lower birth weight, in a sample of 220 mother-infant pairs in Mukono district, Uganda. Maternal aflatoxin exposure was assessed by measuring the serum concentration of AFB1 -lysine (AFB-Lys) adduct at 17.8 ± 3.5 (mean ± SD)-week gestation using high-performance liquid chromatography. Anthropometry and birth outcome characteristics were obtained within 48 hr of delivery. Associations between maternal aflatoxin exposure and birth outcomes were assessed using multivariable linear regression models adjusted for confounding factors. Median maternal AFB-Lys level was 5.83 pg/mg albumin (range: 0.71-95.60 pg/mg albumin, interquartile range: 3.53-9.62 pg/mg albumin). In adjusted linear regression models, elevations in maternal AFB-Lys levels were significantly associated with lower weight (adj-β: 0.07; 95% CI: -0.13, -0.003; p = 0.040), lower weight-for-age z-score (adj-β: -0.16; 95% CI: -0.30, -0.01; p = 0.037), smaller head circumference (adj-β: -0.26; 95% CI: -0.49, -0.02; p = 0.035), and lower head circumference-for-age z-score (adj-β: -0.23; 95% CI: -0.43, -0.03; p = 0.023) in infants at birth. Overall, our data suggest an association between maternal aflatoxin exposure during pregnancy and adverse birth outcomes, particularly lower birth weight and smaller head circumference, but further research is warranted.
Collapse
Affiliation(s)
- Jacqueline M. Lauer
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and PolicyTufts UniversityBostonMassachusetts
- USAID Feed the Future Innovation Lab for NutritionTufts UniversityBostonMassachusetts
- Division of Gastroenterology, Hepatology and NutritionBoston Children's HospitalBostonMassachusetts
| | - Christopher P. Duggan
- USAID Feed the Future Innovation Lab for NutritionTufts UniversityBostonMassachusetts
- Division of Gastroenterology, Hepatology and NutritionBoston Children's HospitalBostonMassachusetts
- Department of NutritionHarvard T.H. Chan School of Public HealthBostonMassachusetts
| | - Lynne M. Ausman
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and PolicyTufts UniversityBostonMassachusetts
- USAID Feed the Future Innovation Lab for NutritionTufts UniversityBostonMassachusetts
| | - Jeffrey K. Griffiths
- Department of Public Health and Community MedicineTufts University School of MedicineBostonMassachusetts
- Cummings School of Veterinary MedicineTufts UniversityGraftonMassachusetts
- School of EngineeringMedfordMassachusetts
| | - Patrick Webb
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and PolicyTufts UniversityBostonMassachusetts
- USAID Feed the Future Innovation Lab for NutritionTufts UniversityBostonMassachusetts
| | - Jia‐Sheng Wang
- Department of Environmental Health ScienceUniversity of GeorgiaAthensGeorgia
| | - Kathy S. Xue
- Department of Environmental Health ScienceUniversity of GeorgiaAthensGeorgia
| | - Edgar Agaba
- USAID Feed the Future Innovation Lab for NutritionTufts UniversityBostonMassachusetts
| | - Nathan Nshakira
- Department of Health ScienceUganda Christian UniversityMukonoUganda
| | - Shibani Ghosh
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and PolicyTufts UniversityBostonMassachusetts
- USAID Feed the Future Innovation Lab for NutritionTufts UniversityBostonMassachusetts
| |
Collapse
|
49
|
Rushing BR, Selim MI. Aflatoxin B1: A review on metabolism, toxicity, occurrence in food, occupational exposure, and detoxification methods. Food Chem Toxicol 2019; 124:81-100. [DOI: 10.1016/j.fct.2018.11.047] [Citation(s) in RCA: 325] [Impact Index Per Article: 65.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 11/16/2018] [Accepted: 11/19/2018] [Indexed: 12/30/2022]
|
50
|
Hoffmann V, Jones K, Leroy JL. The impact of reducing dietary aflatoxin exposure on child linear growth: a cluster randomised controlled trial in Kenya. BMJ Glob Health 2018; 3:e000983. [PMID: 30588341 PMCID: PMC6278920 DOI: 10.1136/bmjgh-2018-000983] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 09/29/2018] [Accepted: 10/14/2018] [Indexed: 01/10/2023] Open
Abstract
Introduction Observational studies have documented an association between aflatoxin (AF) exposure and reduced linear growth in infants and young children. Our objective was to assess the effectiveness of reducing AF exposure on child linear growth and serum AF levels in rural areas in Eastern Kenya. Methods A cluster randomised controlled design was used (28 intervention and 28 control clusters). The intervention arm received a swapping (contaminated maize was replaced with safe maize) and a stockist intervention (households were encouraged to purchase from a stockist supplied with clean maize). Women in the fifth to final month of pregnancy were invited to enrol in the study. Outcomes were child length-for-age Z-score (LAZ), the prevalence of stunting and child serum AFB1-lysine adduct level 24 (endline, primary outcomes) and 11 to 19 months (midline, secondary outcomes) after trial commencement, respectively. The trial was registered with socialscienceregistry.org. Results Of the 1230 unborn children enrolled in the study, 881 (72%) were included in the LAZ and 798 (65%) in the serum AFB1 analysis. The intervention significantly reduced endline ln serum AFB1-lysine adduct levels (intervention effect—0.273, 95% CI −0.547 to 0.001; one-sided p=0.025), but had no effect on endline LAZ or stunting (mean LAZ at endline was −1.64). At midline, the intervention increased LAZ by 0.16 (95% CI −0.009 to 0.33; one-sided p=0.032) and reduced stunting by seven percentage points (95% CI −0.125 to −0.007; one-sided p=0.015), but had no impact on serum AFB1 levels. Conclusion Improving access to AF-free maize substantially reduced endline serum AF, but had no effect on child linear growth. The midline analysis suggests that AF may affect linear growth at younger ages. Trial registration number AEARCTR-0000105.
Collapse
Affiliation(s)
- Vivian Hoffmann
- Markets, Trade and Institutions Division, International Food Policy Research Institute (IFPRI), Washington, DC, USA
| | - Kelly Jones
- Economics Department, American University, Washington, DC, USA
| | - Jef L Leroy
- Poverty, Health and Nutrition Division, International Food Policy Research Institute, Washington, District of Columbia, USA
| |
Collapse
|