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Fan Y, Wang M, Zhang Q, Ouyang S, Mao W, Xu C, Wang M, Long C. Traditional uses, phytochemistry, pharmacology, toxicity and clinical application of traditional Chinese medicine Cynoglossum amabile: a review. Front Pharmacol 2024; 15:1325283. [PMID: 38655180 PMCID: PMC11035817 DOI: 10.3389/fphar.2024.1325283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 03/25/2024] [Indexed: 04/26/2024] Open
Abstract
Cynoglossum amabile, a member of the Boraginaceae family, is a well-known traditional Chinese medicine and ethnomedicine known as Daotihu. Despite several studies confirming the presence of bioactive pyrrolizidine alkaloids such as amabiline, ambelline, echinatine, europine, and others in C. amabile, there has been no comprehensive review of its traditional uses, phytochemistry, and pharmacology thus far. This review was conducted by thoroughly examining the literature and analyzing network databases. It covers various aspects of C. amabile, including botanical characteristics, geographical distribution, traditional applications, phytochemistry, pharmacological activities, toxicology, and clinical applications. The results have shown that C. amabile has been traditionally used for medicinal, edible, and ornamental purposes in China for many centuries. The whole plant, root, and leaf of C. amabile are used by different ethnic groups, such as Lisu, Bai, Naxi, Yi, Jinuo, and Han, to treat malaria, hepatitis, dysentery, leucorrhea, tuberculosis cough, fracture, joint dislocation, trauma bleeding, and skin carbuncle abscess. A total of 47 chemical components, including alkaloids (pyrrolizidine alkaloids, PAs), sterols, organic acids, and saccharides, were isolated from C. amabile. Pharmacological studies show that the chemical extracts of C. amabile possess various biological activities, such as anti-inflammatory, anti-tumor, anti-microbial, cardiovascular effects, ganglionic action, and acetylcholinesterase inhibition. However, it is important to note that C. amabile exhibits hepatotoxicity, with its toxicity being linked to its primary PAs components. Although preliminary studies suggest potential applications in the treatment of prostate diseases and alopecia, further research is needed to validate these clinical uses. Our review highlights the traditional uses, phytochemistry, biological activity, toxicity, and clinical applications of C. amabile. It emphasizes the essential guiding role of the indigenous medicinal knowledge system in developing new drugs. Previous studies have shown that the phytochemical and pharmacological characteristics of C. amabile are significantly related to its traditional medicinal practices. Cynoglossum amabile has excellent market potential and can be further analyzed in terms of phytochemistry, pharmacology, and toxicology, which are critical for its clinical drug safety, quality evaluation, and resource development.
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Affiliation(s)
- Yanxiao Fan
- Key Laboratory of Ecology and Environment in Minority Areas (Minzu University of China), National Ethnic Affairs Commission, Beijing, China
- College of Life and Environmental Sciences, Minzu University of China, Beijing, China
| | - Miaomiao Wang
- Key Laboratory of Ecology and Environment in Minority Areas (Minzu University of China), National Ethnic Affairs Commission, Beijing, China
- College of Life and Environmental Sciences, Minzu University of China, Beijing, China
| | - Qing Zhang
- Key Laboratory of Ecology and Environment in Minority Areas (Minzu University of China), National Ethnic Affairs Commission, Beijing, China
- College of Life and Environmental Sciences, Minzu University of China, Beijing, China
| | - Shuqi Ouyang
- Key Laboratory of Ecology and Environment in Minority Areas (Minzu University of China), National Ethnic Affairs Commission, Beijing, China
| | - Wenhui Mao
- Xianggelila Bureau of Forestry and Grassland, Beijing, China
| | - Congli Xu
- Baoshan Administrative of Gaoligongshan National Nature Reserve, Baoshan, China
| | - Min Wang
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing, China
- BTBU-TANGYI Innovation Center for the Evaluation of the Safety and Efficacy of Bioengineering Raw Materials, Beijing, China
| | - Chunlin Long
- Key Laboratory of Ecology and Environment in Minority Areas (Minzu University of China), National Ethnic Affairs Commission, Beijing, China
- College of Life and Environmental Sciences, Minzu University of China, Beijing, China
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing, China
- Institute of National Security Studies, Minzu University of China, Beijing, China
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Jiao W, Zhu L, Shen T, Wang L, Li QX, Wang C, Wu X, Chen H, Hua R. Simultaneous determination of 15 pyrrolizidine alkaloids and their N-oxides in weeds, soil, fresh tea leaves, and tea: Exploring the pollution source of pyrrolizidine alkaloids in tea. Food Chem 2024; 434:137305. [PMID: 37713752 DOI: 10.1016/j.foodchem.2023.137305] [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: 04/03/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/17/2023]
Abstract
Pyrrolizidine alkaloids (PAs) and their N-oxides (PANOs) are novel contaminants in tea. However, the source of PA/PANO contamination in tea remains unclear. In this study, 15 PAs/PANOs were extracted from plant samples (tea, fresh tea leaves, and weeds) with 0.1 M sulfuric acid and from soil with 0.1 M sulfuric acid methanol after adjusting soil acidity with 0.1 M trisodium citrate. Satisfactory recoveries of PAs/PANOs from four different matrices at 0.02, 0.1, and 0.5 mg kg-1 was 72%-114% with relative standard deviations (RSD) of 0.03%-16%. Seven out of 15 PAs/PANOs were detected in tea purchased from the local market ranging from undetected to 96.2 μg kg-1. Thirteen, three, and four PAs/PANOs were detected in weeds, fresh tea leaves, and soil, respectively. Based on the types of PAs/PANOs detected in the three matrices, it was preliminarily speculated that PAs/PANOs in tea originated from weeds in the tea garden.
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Affiliation(s)
- Weiting Jiao
- School of Resource & Environment of Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, China; State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Lei Zhu
- School of Resource & Environment of Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, China; Tea Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture, Hangzhou 310008, China
| | - Tingting Shen
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Luyao Wang
- School of Resource & Environment of Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, China
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East-West Road, Honolulu, HI 96822, United States
| | - Chen Wang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture, Hangzhou 310008, China
| | - Xiangwei Wu
- School of Resource & Environment of Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, China
| | - Hongping Chen
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture, Hangzhou 310008, China.
| | - Rimao Hua
- School of Resource & Environment of Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, China.
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Lu YS, Qiu J, Mu XY, Qian YZ, Chen L. Levels, Toxic Effects, and Risk Assessment of Pyrrolizidine Alkaloids in Foods: A Review. Foods 2024; 13:536. [PMID: 38397512 PMCID: PMC10888194 DOI: 10.3390/foods13040536] [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: 12/28/2023] [Revised: 01/30/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
Pyrrolizidine alkaloids (PAs) are naturally occurring secondary metabolites of plants. To date, more than 660 types of PAs have been identified from an estimated 6000 plants, and approximately 120 of these PAs are hepatotoxic. As a result of PAs being found in spices, herbal teas, honey, and milk, PAs are considered contaminants in foods, posing a potential risk to human health. Here, we summarize the chemical structure, toxic effects, levels, and regulation of PAs in different countries to provide a better understanding of their toxicity and risk assessment. With recent research on the risk assessment of PAs, this review also discusses the challenges facing this field, aiming to provide a scientific basis for PA toxicity research and safety assessment.
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Affiliation(s)
- Yu-Shun Lu
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.-S.L.); (Y.-Z.Q.)
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China
| | - Jing Qiu
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.-S.L.); (Y.-Z.Q.)
| | - Xi-Yan Mu
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.-S.L.); (Y.-Z.Q.)
| | - Yong-Zhong Qian
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.-S.L.); (Y.-Z.Q.)
| | - Lu Chen
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.-S.L.); (Y.-Z.Q.)
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Jiao W, Zhu L, Li QX, Shi T, Zhang Z, Wu X, Yang T, Hua R, Cao H. Pyrrolizidine Alkaloids in Tea ( Camellia sinensis L.) from Weeds through Weed-Soil-Tea Transfer and Risk Assessment of Tea Intake. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:19045-19053. [PMID: 37982559 DOI: 10.1021/acs.jafc.3c04339] [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: 11/21/2023]
Abstract
Pyrrolizidine alkaloids (PAs) have been detected in tea and can threaten human health. However, the specific source of PAs in tea is still unclear. Here, 88 dried tea products collected from six major tea-producing areas in Anhui Province, China, were analyzed. The detection frequency was 76%. The content of total PAs in dried tea was between 1.1 and 90.5 μg/kg, which was all below the MRL recommended by the European Union (150 μg/kg). In the Shexian tea garden, PAs in the weeds and weed rhizospheric soil around tea plants and the fresh tea leaves were analyzed. Intermedine (Im), intermedine-N-oxide (ImNO), and jacobine-N-oxide (JbNO) were transferred through the weed-to-soil-to-tea route into the fresh tea leaves; only Im and ImNO were detected in dried tea samples. Potential risk of the total PAs in the tea infusion was assessed according to the margin of exposure method, and it might be a low concern for public health.
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Affiliation(s)
- Weiting Jiao
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resource & Environment of Anhui Agricultural University, Hefei 230036, China
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Lei Zhu
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resource & Environment of Anhui Agricultural University, Hefei 230036, China
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East-West Road, Honolulu, Hawaii 96822, United States
| | - Taozhong Shi
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resource & Environment of Anhui Agricultural University, Hefei 230036, China
| | - Zhaoxian Zhang
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resource & Environment of Anhui Agricultural University, Hefei 230036, China
| | - Xiangwei Wu
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resource & Environment of Anhui Agricultural University, Hefei 230036, China
| | - Tianyuan Yang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Rimao Hua
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resource & Environment of Anhui Agricultural University, Hefei 230036, China
| | - Haiqun Cao
- School of Plant Protection, Anhui Province Engineering Laboratory for Green Pesticide Development and Application, and Anhui Province Key Laboratory of Crop Integrated Pest Management, Anhui Agricultural University, Hefei 230036, China
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Gumus ZP. Assessment of Toxic Pyrrolizidine and Tropane Alkaloids in Herbal Teas and Culinary Herbs Using LC-Q-ToF/MS. Foods 2023; 12:3572. [PMID: 37835225 PMCID: PMC10572649 DOI: 10.3390/foods12193572] [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: 08/23/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/15/2023] Open
Abstract
Pyrrolizidine alkaloids are secondary metabolites produced by plants as a defense against insects. These can cause acute or chronic toxicity in humans. Therefore, avoiding potential poisoning from the consumption of tea and culinary plants contaminated with pyrrolizidine alkaloids (PAs), pyrrolizidine alkaloids N-oxides (PANOs), and tropane alkaloids (TAs) is important for human health and food safety. Therefore, it is important to determine the levels of these substances with reliable and highly accurate methods. In this study, the PAs, PANOs, and TAs in herbal teas and culinary herbs sold in Turkish markets were identified and their levels were determined. Thus, the general profiles of herbal teas and culinary herbs in Turkey were revealed, and the compliance of the total amounts of PA and TA with the regulations was examined. The identification and quantification of 25 PAs and N-oxides and 2 TAs (atropine and scopolamine) in the samples was performed with a liquid chromatography-quadrupole time-of-flight tandem mass spectrometer (LC-Q-ToF/MS). At least a few of these substances were detected in all of the tested herbal teas and culinary herbs. The total contents of the black tea, green tea, mixed tea, flavored tea, chamomile tea, sage tea, linden tea, fennel tea, rosehip tea, peppermint, and thyme samples ranged from 4.6 ng g-1 to 1054.5 ng g-1. The results obtained shed light on the importance of analyzing the total dehydro PA, PANO, and TA amounts in plant-based products consumed in diets with sensitive and accurate methods, and they highlight the necessity of performing these analyses routinely in terms of food safety.
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Affiliation(s)
- Zinar Pinar Gumus
- Central Research Test and Analysis Laboratory Application and Research Center (EGE-MATAL), Ege University, 35100 Izmir, Turkey
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Sousa AC, Ribeiro C, Gonçalves VMF, Pádua I, Leal S. Chromatographic Methods for Detection and Quantification of Pyrrolizidine Alkaloids in Flora, Herbal Medicines, and Food: An Overview. Crit Rev Anal Chem 2023:1-25. [PMID: 37300809 DOI: 10.1080/10408347.2023.2218476] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Pyrrolizidine alkaloids (PAs) are natural toxins produced by some plants that gained special interest due to their potential hazardous effects in humans and animals. These substances have been found in wild flora, herbal medicines and food products raising health concerns. Recently, maximum concentration levels of PAs were established for some food products; however, maximum daily intake frequently surpasses the upper limit set by the competent authorities posing a health risk. Given the scarcity or absence of occurrence data on PAs in many products, there is an urgent need to measure their levels and establish safety intake levels. Analytical methods have been reported to detect and quantify PAs in different matrices. The commonly used chromatographic methodologies provides accurate and reliable results. Analytical methods include diverse steps as extraction and sample preparation procedures that are critical for sensitivity and selectivity of the analytical method. Great efforts have been directed toward optimization of extraction procedures, clean up and chromatographic conditions to improve recovery, reduce matrix effects, and achieve low limits of detection and quantification. Therefore, this paper aims to give a general overview about the occurrence of PAs in flora, herbal medicines, and foodstuff; and discuss the different chromatographic methodologies used for PAs analysis, namely extraction and sample preparation procedures and chromatographic conditions.
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Affiliation(s)
- Ana Catarina Sousa
- TOXRUN - Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, Gandra, Portugal
| | - Cláudia Ribeiro
- TOXRUN - Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, Gandra, Portugal
| | - Virgínia M F Gonçalves
- TOXRUN - Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, Gandra, Portugal
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
| | - Inês Pádua
- TOXRUN - Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, Gandra, Portugal
- Epidemiology Unit - Institute of Public Health of University of Porto (ISPUP), Porto, Portugal
| | - Sandra Leal
- TOXRUN - Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, Gandra, Portugal
- CINTESIS-RISE, MEDCIDS, Faculty of Medicine, University of Porto, Porto, Portugal
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Luo Z, Chen X, Ma Y, Yang F, He N, Yu L, Zeng A. Multi-template imprinted solid-phase microextraction coupled with UPLC-Q-TOF-MS for simultaneous monitoring of ten hepatotoxic pyrrolizidine alkaloids in scented tea. Front Chem 2022; 10:1048467. [PMID: 36518981 PMCID: PMC9742424 DOI: 10.3389/fchem.2022.1048467] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/18/2022] [Indexed: 08/27/2024] Open
Abstract
Pyrrolizidine alkaloids (PAs) are a series of ubiquitous natural toxins in flowering plants, which are associated with serious hepatic disease in humans. However, the simultaneously fast and sensitive monitoring of different PAs are still challenge because of the diversity of PAs and huge amount of interference in complex samples, such as scented tea samples. In this study, molecularly imprinted solid phase microextraction (MIP-SPME) fibers were fabricated by using multi-template imprinting technique for selective recognition and efficient enrichment of different PAs from scented teas. MIP-SPME could be used for selective adsorption of ten types of PAs through specific recognition cavity and strong ionic interaction, including senecionine, lycopsamine, retrorsine, heliotrine, lasiocarpine, monocrotaline, echimidine, erucifoline, europine and seneciphylline. The extraction parameters were also optimized including extraction time, elution solvent and elution time. Then, ultra performance liquid chromatography- quadrupole-time of flight mass spectrometry (UPLC-Q-TOF-MS) coupled with MIP-SPME method was developed for fast, simple, sensitive and accurate determination of ten PAs in scented teas. The established method was validated and presented satisfactory accuracy and high precision. It was also successfully applied for simultaneous determination of ten PAs in different scented tea samples. PAs were found in most of these scented tea samples, which suggest the cautious use of scented tea for consumers.
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Affiliation(s)
- Zhimin Luo
- School of Pharmacy, Xi’an Jiaotong University, Xi’an, China
| | | | | | | | | | | | - Aiguo Zeng
- School of Pharmacy, Xi’an Jiaotong University, Xi’an, China
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Jansons M, Fedorenko D, Pavlenko R, Berzina Z, Bartkevics V. Nanoflow liquid chromatography mass spectrometry method for quantitative analysis and target ion screening of pyrrolizidine alkaloids in honey, tea, herbal tinctures, and milk. J Chromatogr A 2022; 1676:463269. [PMID: 35763949 DOI: 10.1016/j.chroma.2022.463269] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/19/2022] [Accepted: 06/20/2022] [Indexed: 11/26/2022]
Abstract
A method for the determination of pyrrolizidine alkaloids in tea, honey, herbal tinctures, and milk samples was developed by employing nano-LC-MS with high-resolution Orbitrap mass spectrometry. Quantitation was performed using the available analytical standards, and a MS2 target ion screening approach was developed using fragment ions that were specific for pyrrolizidine alkaloids under collision-induced dissociation. Proof of concept was delivered for the screening approach, proposing that the C6H8N+ fragment ion is a highly selective fragment ion for the detection of potential pyrrolizidine alkaloids. The elaborated quantitation was applied for the occurrence study of pyrrolizidine alkaloids in food products available on the Latvian market, including samples of tea (n = 15), honey (n = 40), herbal tinctures (n = 15), and milk (n = 10). The median LOQ over all analytes was 0.33 µg kg-1 in honey, 3.6 µg kg-1 in tea, 3.3 µg kg-1 in herbal tinctures, and 0.32 µg kg-1 in milk. The herbal tinctures samples and milk samples did not contain pyrrolizidine alkaloids above LOQ values. Analytes were detected in 33% of honey and 47% of tea samples. Most common were echimidine, intermedine, and enchinatine N-oxide. Pyrrolizidine alkaloids in tea samples were mainly N-oxides, with the highest total concentration being 215 µg kg-1 among the samples, exceeding the maximum limit of 200 µg kg-1 set by Commission Regulation (EU) 2020/2040. In honey samples, lycopsamine-type alkaloids were detected most frequently, with the highest total concentration equal to 74 µg kg-1. Advantages of the developed nano-LC-MS methods included increased sensitivity in comparison with conventional flow LC-MS, low solvent consumption typical with nano-LC and the novel use of a selective common target ion for detection and discovery of potential pyrrolizidine alkaloids using high resolution mass spectrometry.
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Affiliation(s)
- Martins Jansons
- Animal Health and Environment "BIOR", Institute of Food Safety, Lejupes iela 3, Riga, LV 1076, Latvia.
| | - Deniss Fedorenko
- Animal Health and Environment "BIOR", Institute of Food Safety, Lejupes iela 3, Riga, LV 1076, Latvia; Faculty of Chemistry, University of Latvia, Jelgavas iela 1, Riga, LV 1004, Latvia
| | - Romans Pavlenko
- Animal Health and Environment "BIOR", Institute of Food Safety, Lejupes iela 3, Riga, LV 1076, Latvia; Faculty of Chemistry, University of Latvia, Jelgavas iela 1, Riga, LV 1004, Latvia
| | - Zane Berzina
- Animal Health and Environment "BIOR", Institute of Food Safety, Lejupes iela 3, Riga, LV 1076, Latvia; Faculty of Chemistry, University of Latvia, Jelgavas iela 1, Riga, LV 1004, Latvia
| | - Vadims Bartkevics
- Animal Health and Environment "BIOR", Institute of Food Safety, Lejupes iela 3, Riga, LV 1076, Latvia; Faculty of Chemistry, University of Latvia, Jelgavas iela 1, Riga, LV 1004, Latvia
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Han H, Jiang C, Wang C, Wang Z, Chai Y, Zhang X, Liu X, Lu C, Chen H. Development, optimization, validation and application of ultra high performance liquid chromatography tandem mass spectrometry for the analysis of pyrrolizidine alkaloids and pyrrolizidine alkaloid N-oxides in teas and weeds. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108518] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Martinello M, Manzinello C, Gallina A, Mutinelli F. In‐house validation and application of UHPLC‐MS/MS method for the quantification of pyrrolizidine and tropane alkaloids in commercial honey bee‐collected pollen, teas and herbal infusions purchased on Italian market in 2019‐2020 referring to recent European Union regulations. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15567] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Marianna Martinello
- Istituto Zooprofilattico Sperimentale delle Venezie NRL for honey bee health Viale dell’Università 10 35020 Legnaro PD Italy
| | - Chiara Manzinello
- Istituto Zooprofilattico Sperimentale delle Venezie NRL for honey bee health Viale dell’Università 10 35020 Legnaro PD Italy
| | - Albino Gallina
- Istituto Zooprofilattico Sperimentale delle Venezie NRL for honey bee health Viale dell’Università 10 35020 Legnaro PD Italy
| | - Franco Mutinelli
- Istituto Zooprofilattico Sperimentale delle Venezie NRL for honey bee health Viale dell’Università 10 35020 Legnaro PD Italy
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Rivera-Pérez A, Romero-González R, Garrido Frenich A. Determination and Occurrence of Alkenylbenzenes, Pyrrolizidine and Tropane Alkaloids in Spices, Herbs, Teas, and Other Plant-derived Food Products Using Chromatographic Methods: Review from 2010–2020. FOOD REVIEWS INTERNATIONAL 2021. [DOI: 10.1080/87559129.2021.1929300] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Araceli Rivera-Pérez
- Research Group “Analytical Chemistry of Contaminants”, Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agrifood Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence (Ceia3), University of Almeria, Almeria, Spain
| | - Roberto Romero-González
- Research Group “Analytical Chemistry of Contaminants”, Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agrifood Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence (Ceia3), University of Almeria, Almeria, Spain
| | - Antonia Garrido Frenich
- Research Group “Analytical Chemistry of Contaminants”, Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agrifood Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence (Ceia3), University of Almeria, Almeria, Spain
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12
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Transfer of pyrrolizidine alkaloids from ragwort, common groundsel and viper's bugloss to milk from dairy cows. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2020; 37:1906-1921. [PMID: 32870736 DOI: 10.1080/19440049.2020.1798028] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
To investigate the transfer of pyrrolizidine alkaloids (PAs) from feed to milk, rumen-cannulated dairy cows were intra-ruminally fed with 200 g/day of dried plant material of either ragwort (mixture of Jacobaea vulgaris and Senecio inaequidens), common groundsel (Senecio vulgaris) or viper's bugloss (Echium vulgare) for a period of 4 days. PA levels in the plant materials were 3767, 2792 and 1674 µg g-1 respectively. Feed intake, milk yield and several blood parameters indicative for liver function were not influenced by the treatment. When fed ragwort, increased levels of PAs were detected in the milk, in particular jacoline and an unidentified cyclic diester, possibly a hydroxylated metabolite from retrorsine. The latter was the most important PA in milk from cows fed common groundsel. For viper's bugloss, echimidine was the most abundant identified PA but in addition several hydroxylated PA metabolites were detected. For ragwort, the overall PA transfer was estimated at 0.05% and 1.4% for jacoline (N-oxide). Transfer rates were similar for viper's bugloss (0.05%) but lower for common groundsel (0.01%). Only a small portion of the administered PAs was quantified in milk, urine and faeces, with an overall balance of 4.5%, 2.9% and 5.8%, for ragwort, common groundsel and viper's bugloss, respectively. Samples taken from the rumen indicated that the N-oxides were converted into the free bases, which was confirmed by in vitro studies with the same plant species incubated with ruminal fluid. These results confirm that the transfer of PAs to milk is relatively low but may be of concern for human health regarding the genotoxic and carcinogenic properties of these compounds. The transfer rate depends on the type of PAs present in the weeds. The incomplete balance of input vs output stresses the need to further investigate the metabolism and the potential transfer of metabolites into edible products.
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Kaczyński P, Łozowicka B. A novel approach for fast and simple determination pyrrolizidine alkaloids in herbs by ultrasound-assisted dispersive solid phase extraction method coupled to liquid chromatography-tandem mass spectrometry. J Pharm Biomed Anal 2020; 187:113351. [PMID: 32388321 DOI: 10.1016/j.jpba.2020.113351] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 02/06/2023]
Abstract
Pyrrolizidine alkaloids (PAs) are secondary plant metabolites witch can contaminate food, especially herbs. Due to the fact that alkaloids have a strong adverse effect on human health, it is necessary to use sensitive and selective detection methods. In present study a modified method based on LC-MS/MS was developed and validated for the simultaneous determination of thirty pyrrolizidine alkaloids and their corresponding N-oxides (PANOs) in herbs samples. Sample extraction was based on ultrasound-assisted dispersive solid phase extraction and clean-up using graphene. Method validation showed that the proposed method hold good recoveries (61-128 %) for PAs/PANOs with RSD <15 %. Limits of quantification has been set at 1 μg kg-1 level for all targeted alkaloids. The optimized method yielded a small matrix effect (-20-20 %) for most PAs/PANOs. The uncertainty associated with the analytical method was not higher than 38 %. The method is operationally simple, time-saving, and can be applied to the analysis of real herb samples.
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Affiliation(s)
- Piotr Kaczyński
- Institute of Plant Protection - National Research Institute, Chełmońskiego 22, 15-195 Bialystok, Poland.
| | - Bożena Łozowicka
- Institute of Plant Protection - National Research Institute, Chełmońskiego 22, 15-195 Bialystok, Poland
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Kowalczyk E, Kwiatek K. Application of the sum parameter method for the determination of pyrrolizidine alkaloids in teas. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2020; 37:622-633. [PMID: 32023201 DOI: 10.1080/19440049.2020.1719284] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Tea samples from the Polish market were analysed for the determination of pyrrolizidine alkaloids (PAs). The method applied in the study is based on the GC-MS technique and uses the sum parameter approach for quantification. The analytical protocol was subjected to validation in terms of linearity, repeatability, reproducibility, the limit of quantification and determination, matrix effect, selectivity, and uncertainty, and all evaluated parameters fulfilled the requirements of Commission Decision 2002/657. A total of 78% of the analysed samples contained 1,2-unsaturated PAs, and the concentrations were determined to fall in the range of 2-6498 µg kg-1. The highly contaminated samples were additionally subjected to LC-MS analysis. Much higher PA concentrations were determined with the sum parameter method, proving its superior quantification capability. The high contamination found prompted an assessment of the dietary exposure from the consumption of infusions prepared from the analysed teas. Two approaches were adopted: one assuming 100% transfer of PAs to the infusions and the second assuming only partial transfer. Regardless of the adopted approach, consumption of several infusions was shown to greatly exceed the maximum acceptable daily intake of PAs.
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Affiliation(s)
- Ewelina Kowalczyk
- Department of Hygiene of Animal Feedingstuffs, National Veterinary Research Institute, Puławy, Poland
| | - Krzysztof Kwiatek
- Department of Hygiene of Animal Feedingstuffs, National Veterinary Research Institute, Puławy, Poland
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Development of a sensitive analytical method for determining 44 pyrrolizidine alkaloids in teas and herbal teas via LC-ESI-MS/MS. Anal Bioanal Chem 2019; 411:7233-7249. [PMID: 31511948 DOI: 10.1007/s00216-019-02117-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 08/13/2019] [Accepted: 08/26/2019] [Indexed: 10/26/2022]
Abstract
Pyrrolizidine alkaloids (PA) and PA-N-oxides (PANO) are a large group of secondary plant metabolites comprising more than 660 compounds. Exhibiting geno- and hepatotoxic properties, they are responsible for multiple cases of food and feed poisoning over the last 100 years. For food and feed safety reasons, relevant PA/PANO should be monitored extensively in the main sources of PA/PANO intake. In this study, a sensitive analytical method was developed for detecting a broad range of 44 commercially available PA/PANO compounds, and in-house validation procedures were performed for several (herbal) teas. Various extraction solvents and procedures, as well as solid phase extraction materials for sample clean-up and analyte concentration, were tested to establish the methods' efficiency and effectiveness. Chromatographic conditions were optimised to obtain the best possible separation of isomers for the 44 PA/PANO analytes. The final method was proven very sensitive and accurate, with detection limits ranging from 0.1 to 7.0 μg/kg and precisions between 0.7 and 16.1%. For 40 of the analytes, the recovery rates ranged from 60.7 to 128.8%. The applicability and trueness of the method were examined by analysing tea samples from a local supermarket and comparing them to a reference material. At least one PA/PANO analyte was detected in 17 of the 18 samples under investigation, and the sum contents of the samples ranged from 0.1 to 47.9 μg/kg. Knowledge of the PA/PANO composition in a sample can be used to indicate the botanical origin of the impurity and, thus, the geographical region of cultivation.
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Prediction of in vivo genotoxicity of lasiocarpine and riddelliine in rat liver using a combined in vitro-physiologically based kinetic modelling-facilitated reverse dosimetry approach. Arch Toxicol 2019; 93:2385-2395. [PMID: 31289892 DOI: 10.1007/s00204-019-02515-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 07/04/2019] [Indexed: 12/16/2022]
Abstract
Pyrrolizidine alkaloids (PAs) are naturally occurring genotoxic compounds, and PA-containing plants can pose a risk to humans through contaminated food sources and herbal products. Upon metabolic activation, PAs can form DNA adducts, DNA and protein cross links, chromosomal aberrations, micronuclei, and DNA double-strand breaks. These genotoxic effects may induce gene mutations and play a role in the carcinogenesis of PAs. This study aims to predict in vivo genotoxicity for two well-studied PAs, lasiocarpine and riddelliine, in rat using in vitro genotoxicity data and physiologically based kinetic (PBK) modelling-based reverse dosimetry. The phosphorylation of histone protein H2AX was used as a quantitative surrogate endpoint for in vitro genotoxicity of lasiocarpine and riddelliine in primary rat hepatocytes and human HepaRG cells. The in vitro concentration-response curves obtained from primary rat hepatocytes were subsequently converted to in vivo dose-response curves from which points of departure (PoDs) were derived that were compared to available in vivo genotoxicity data. The results showed that the predicted PoDs for lasiocarpine and riddelliine were comparable to in vivo genotoxicity data. It is concluded that this quantitative in vitro-in silico approach provides a method to predict in vivo genotoxicity for the large number of PAs for which in vivo genotoxicity data are lacking by integrating in vitro genotoxicity assays with PBK modelling-facilitated reverse dosimetry.
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Chmit MS, Wahrig B, Beuerle T. Quantitative and qualitative analysis of pyrrolizidine alkaloids in liqueurs, elixirs and herbal juices. Fitoterapia 2019; 136:104172. [PMID: 31100438 DOI: 10.1016/j.fitote.2019.104172] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/06/2019] [Accepted: 05/10/2019] [Indexed: 12/24/2022]
Abstract
Pyrrolizidine alkaloids (PAs and corresponding N-oxides (PANOs)) are known to have adverse health effects. Their toxic effects on liver cells are especially well-documented. In addition, potential carcinogenic and mutagenic effects in chronic exposure via food and/or herbal medicines have been a subject of vivid discussion in the last decade. Liqueurs and elixirs are traditionally used alcoholic extracts made from parts of plants and herbs. PA cross-contamination of the final products seems likely. Hence, this study aims to detect and quantify the PAs in such products in the light of a possible PA-contamination. The PA content was determined in the form of a single sum parameter using HPLC-ESI-MS/MS and a stable isotope-labeled internal standard. Overall, 56 products available at German pharmacies, drugstores, or internet shops were analyzed, comprising in total 38 samples of liqueurs (mainly bitters), 12 samples of plant elixirs and six different herbal juices. The results showed that 9 out of 38 liqueurs were PA-positive (24%). The total amount of PAs ranged from non-detectable to 9.5 μg/kg. Seven out of ten elixirs were PA-positive (70%) with a maximum PA-content of 3121 μg/kg. Four out of six plant juices were PA-positive (67%) with an average of 4.4 μg/kg (PA-positive samples only).The results and potential risks are discussed in the light of recommended portions for daily consumption or daily doses, in association with the detected PA amounts for individual products and product classes.
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Affiliation(s)
- Mohammad Said Chmit
- Technische Universität Braunschweig, Institut für Pharmazeutische Biologie, Mendelssohnstr. 1, Braunschweig 38106, Germany.
| | - Bettina Wahrig
- Technische Universität Braunschweig, Abteilung für Pharmazie- und Wissenschaftsgeschichte, Beethovenstraße 55, Braunschweig 38106, Germany.
| | - Till Beuerle
- Technische Universität Braunschweig, Institut für Pharmazeutische Biologie, Mendelssohnstr. 1, Braunschweig 38106, Germany.
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Flade J, Beschow H, Wensch-Dorendorf M, Plescher A, Wätjen W. Occurrence of Nine Pyrrolizidine Alkaloids in Senecio vulgaris L. Depending on Developmental Stage and Season. PLANTS (BASEL, SWITZERLAND) 2019; 8:E54. [PMID: 30841617 PMCID: PMC6473320 DOI: 10.3390/plants8030054] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/18/2019] [Accepted: 02/19/2019] [Indexed: 01/27/2023]
Abstract
The contamination of phytopharmaceuticals and herbal teas with toxic plants is an increasing problem. Senecio vulgaris L. is a particularly noxious weed in agricultural and horticultural crops due to its content of toxic pyrrolizidine alkaloids (PAs). Since some of these compounds are carcinogenic, the distribution of this plant should be monitored. The amount of PAs in S. vulgaris is affected by various factors. Therefore, we investigated the occurrence of PAs depending on the developmental stage and season. A systematic study using field-plot experiments (four seasons, five developmental stages of the plants: S1 to S5) was performed and the PA concentration was determined via LC-MS/MS analysis. The total amount of PAs in the plant increased with the plant development, however, the total PA concentrations in µg/g dry matter remained nearly unchanged, whilst trends for specific PAs were observed. The concentrations of PA-N-oxides (PANOs) were much higher than that of tertiary PAs. Maximal amounts of the PA total were 54.16 ± 4.38 mg/plant (spring, S5). The total amount of PAs increased strongly until later developmental stages. Therefore, even small numbers of S. vulgaris may become sufficient for relevant contaminations set out by the maximal permitted daily intake levels recommended by the European Food Safety Authority (EFSA).
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Affiliation(s)
- Jens Flade
- Plant Nutrition, Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Betty-Heimann-Strasse 3, 06120 Halle/Saale, Germany.
- PHARMAPLANT Arznei- und Gewürzpflanzen Forschungs- und Saatzucht GmbH, Am Westbahnhof 4, 06556 Artern, Germany.
- Biofunctionality of Secondary Plant Compounds, Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Weinbergweg 22, 06120 Halle/Saale, Germany.
| | - Heidrun Beschow
- Plant Nutrition, Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Betty-Heimann-Strasse 3, 06120 Halle/Saale, Germany.
| | - Monika Wensch-Dorendorf
- AG Biometrie und Agrarinformatik, Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Strasse 4, 06120 Halle/Saale, Germany.
| | - Andreas Plescher
- PHARMAPLANT Arznei- und Gewürzpflanzen Forschungs- und Saatzucht GmbH, Am Westbahnhof 4, 06556 Artern, Germany.
| | - Wim Wätjen
- Biofunctionality of Secondary Plant Compounds, Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Weinbergweg 22, 06120 Halle/Saale, Germany.
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Osman AG, Haider S, Chittiboyina AG, Khan IA. Utility of alkaloids as chemical and biomarkers for quality, efficacy, and safety assessment of botanical ingredients. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 54:347-356. [PMID: 30837071 DOI: 10.1016/j.phymed.2018.03.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/04/2018] [Accepted: 03/26/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Selecting the appropriate chemical and bio-markers for monitoring the quality, efficacy, and safety is critical for efficient and reliable assessment of traditional medicines derived from botanical sources. Chemical markers have been implicated primarily in establishing the analytical methodologies aiming at verification of the botanical sources of the raw materials, the extracts, and the finished products such as botanical dietary supplements and nutraceuticals. In addition, they have been employed in differentiation between crude or raw (unprocessed) and processed plant extracts, and identification as well as determination of potential toxicants and adulterants in herbal medicines. Additionally, these chemical markers are utilized for selection of efficient methods for extraction of plants. Further, biomarkers have been exploited in determination of the pharmacokinetic properties of bioactive herbal constituents. Alkaloids, unlike other plant constituents, are uniquely characterized by having basic properties, and possessing substantial and diverse pharmacological effects. These features make alkaloids attractive components for functioning as chemical and biomarkers in determining the quality of botanical ingredients where this class of phytochemicals prevail or is responsible for lending biological effects. PURPOSE The aim of the review is to exhibit the function of alkaloids as biomarkers and chemical markers in the evaluation of quality, efficacy, and safety of medicinal herbs and their commercial products. METHODS Literature acquisition was accomplished using the most commonly accessed scholarly search engines including SciFinder, PubMed, and Google Scholar. Secondly, the full-texts which are relevant to the topic were included in this review. This was followed by a thorough and detailed analysis of the collected information. RESULTS The literature search with main emphasis on the roles of alkaloids in the evaluation of quality, efficacy and safety of herbal medicines was evaluated to provide all succinct information in one place. Compilation of such critical information is expected to help the reader to appreciate alkaloids as important markers in the quality control of herbal drugs and products. CONCLUSION The current review article covers the fundamental roles played by alkaloids as chemical and biomarkers in assessing the essential parameters of the quality of botanical ingredients, as briefly described earlier. The utilization of alkaloids as biomarkers to determine the efficacy-linked pharmacokinetic parameters is limited to reviewing studies on human subjects.
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Affiliation(s)
- Ahmed G Osman
- National Center for Natural Products Research, University of Mississippi, University, MS 38677, USA
| | - Saqlain Haider
- National Center for Natural Products Research, University of Mississippi, University, MS 38677, USA
| | - Amar G Chittiboyina
- National Center for Natural Products Research, University of Mississippi, University, MS 38677, USA.
| | - Ikhlas A Khan
- National Center for Natural Products Research, University of Mississippi, University, MS 38677, USA; Division of Pharmacognosy, Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA.
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Schramm S, Köhler N, Rozhon W. Pyrrolizidine Alkaloids: Biosynthesis, Biological Activities and Occurrence in Crop Plants. Molecules 2019; 24:E498. [PMID: 30704105 PMCID: PMC6385001 DOI: 10.3390/molecules24030498] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 12/13/2022] Open
Abstract
Pyrrolizidine alkaloids (PAs) are heterocyclic secondary metabolites with a typical pyrrolizidine motif predominantly produced by plants as defense chemicals against herbivores. They display a wide structural diversity and occur in a vast number of species with novel structures and occurrences continuously being discovered. These alkaloids exhibit strong hepatotoxic, genotoxic, cytotoxic, tumorigenic, and neurotoxic activities, and thereby pose a serious threat to the health of humans since they are known contaminants of foods including grain, milk, honey, and eggs, as well as plant derived pharmaceuticals and food supplements. Livestock and fodder can be affected due to PA-containing plants on pastures and fields. Despite their importance as toxic contaminants of agricultural products, there is limited knowledge about their biosynthesis. While the intermediates were well defined by feeding experiments, only one enzyme involved in PA biosynthesis has been characterized so far, the homospermidine synthase catalyzing the first committed step in PA biosynthesis. This review gives an overview about structural diversity of PAs, biosynthetic pathways of necine base, and necic acid formation and how PA accumulation is regulated. Furthermore, we discuss their role in plant ecology and their modes of toxicity towards humans and animals. Finally, several examples of PA-producing crop plants are discussed.
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Affiliation(s)
- Sebastian Schramm
- Biotechnology of Horticultural Crops, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Liesel-Beckmann-Straße 1, 85354 Freising, Germany.
| | - Nikolai Köhler
- Biotechnology of Horticultural Crops, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Liesel-Beckmann-Straße 1, 85354 Freising, Germany.
| | - Wilfried Rozhon
- Biotechnology of Horticultural Crops, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Liesel-Beckmann-Straße 1, 85354 Freising, Germany.
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Drobac M, Arsenijević J, Marčetić M. Safety aspects of herbal products containing compounds with a potential risk. ARHIV ZA FARMACIJU 2019. [DOI: 10.5937/arhfarm1904307d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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Ma C, Liu Y, Zhu L, Ji H, Song X, Guo H, Yi T. Determination and regulation of hepatotoxic pyrrolizidine alkaloids in food: A critical review of recent research. Food Chem Toxicol 2018; 119:50-60. [DOI: 10.1016/j.fct.2018.05.037] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 05/11/2018] [Accepted: 05/13/2018] [Indexed: 11/26/2022]
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Muluneh F, Häkkinen MR, El-Dairi R, Pasanen M, Juvonen RO. New glutathione conjugate of pyrrolizidine alkaloids produced by human cytosolic enzyme-dependent reactions in vitro. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2018; 32:1344-1352. [PMID: 29788543 DOI: 10.1002/rcm.8173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 05/06/2018] [Accepted: 05/11/2018] [Indexed: 06/08/2023]
Abstract
RATIONALE The toxic metabolites of pyrrolizidine alkaloids (PAs) are initially formed by cytochrome P450-mediated oxidation reactions and primarily eliminated as glutathione (GSH) conjugates. Although the reaction between the reactive metabolites and GSH can occur spontaneously, the role of the cytosolic enzymes in the process has not been studied. METHODS The toxic metabolites of selected PAs (retrorsine, monocrotaline, senecionine, lasiocarpine, heliotrine or senkirkine) were generated by incubating them in 100 mM phosphate buffer (pH 7.4) containing liver microsomes of human, pig, rat or sheep, NADPH and reduced GSH in the absence or presence of human, pig, rat or sheep liver cytosolic fraction. The supernatants were analyzed using liquid chromatography connected to Finnigan LTQ ion-trap, Agilent QTOF or Thermo Scientific Q Exactive Focus quadrupole-orbitrap mass spectrometers. RESULTS Retrorsine, senecionine and lasiocarpine yielded three GSH conjugates producing [M - H]- ions at m/z 439 (7-GSH-DHP (CHO)), m/z 441 (7-GSH-DHP (OH)) and m/z 730 (7,9-diGSH-DHP) in the presence of human liver cytosolic fraction. 7-GSH-DHP (CHO) was a novel metabolite. Monocrotaline, heliotrine and senkirkine did not produce this novel 7-GSH-DHP (CHO) conjugate. 7-GSH-DHP (CHO) disappeared when incubated with hydroxylamine, and a new oxime derivative was formed. This metabolite was formed only by the human liver cytosolic enzymes but not in the presence of rat or sheep liver cytosolic fractions under otherwise identical reaction conditions. CONCLUSIONS 7-GSH-DHP (CHO) has not been reported before, and thus it was considered as a novel metabolite of PAs. This may clarify the mechanisms involved in PA detoxification and widely observed but less understood species differences in response to PA exposure.
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Affiliation(s)
- Fashe Muluneh
- University of Eastern Finland, School of Pharmacy, Faculty of Health Sciences, Box 1627, 70211, Kuopio, Finland
- National Institute of Environmental Health Sciences, Reproductive & Developmental Biology Laboratory/Pharmacogenetics Group, NIH, Research Triangle Park, NC, 27709, USA
| | - Merja R Häkkinen
- University of Eastern Finland, School of Pharmacy, Faculty of Health Sciences, Box 1627, 70211, Kuopio, Finland
| | - Rami El-Dairi
- University of Eastern Finland, School of Pharmacy, Faculty of Health Sciences, Box 1627, 70211, Kuopio, Finland
| | - Markku Pasanen
- University of Eastern Finland, School of Pharmacy, Faculty of Health Sciences, Box 1627, 70211, Kuopio, Finland
| | - Risto O Juvonen
- University of Eastern Finland, School of Pharmacy, Faculty of Health Sciences, Box 1627, 70211, Kuopio, Finland
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Shipkowski KA, Betz JM, Birnbaum LS, Bucher JR, Coates PM, Hopp DC, MacKay D, Oketch-Rabah H, Walker NJ, Welch C, Rider CV. Naturally complex: Perspectives and challenges associated with Botanical Dietary Supplement Safety assessment. Food Chem Toxicol 2018; 118:963-971. [PMID: 29626579 PMCID: PMC6087675 DOI: 10.1016/j.fct.2018.04.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/02/2018] [Accepted: 04/03/2018] [Indexed: 10/17/2022]
Abstract
Due to the extensive use of botanical dietary supplements by consumers in the United States, there is a need for appropriate research and data to support safety assessments. Complexity and variability, both natural and introduced, of botanical dietary supplements make research on these products difficult. Botanical dietary supplements are regulated by the Food and Drug Administration (FDA) under the Federal Food, Drug, and Cosmetic Act (FD&C Act), as amended by the 1994 Dietary Supplement Health and Education Act (DSHEA). They are regulated as a category of food, which differs from the regulation of pharmaceutical products. Both manufacturers and the FDA are faced with the challenge of determining the best approaches for evaluating and monitoring the safety of botanical products. High quality botanicals research requires accurate identification and characterization of the material being studied. Inconsistent results in efficacy studies of botanical dietary supplements have led to efforts to improve the rigor and reproducibility of research in the field. Addressing the challenges associated with botanical dietary supplement safety is a global effort requiring coordination between numerous stakeholders, including researchers, suppliers, manufacturers, and regulators, all of whom play a role in ensuring that high quality products are available on the market.
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Affiliation(s)
- Kelly A Shipkowski
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA; ICF International, Inc., Durham, NC, USA
| | - Joseph M Betz
- Office of Dietary Supplements, National Institutes of Health, Bethesda, MD, USA
| | - Linda S Birnbaum
- National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - John R Bucher
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Paul M Coates
- Office of Dietary Supplements, National Institutes of Health, Bethesda, MD, USA
| | - D Craig Hopp
- National Center for Complementary and Integrative Health, National Institutes of Health, Bethesda, MD, USA
| | - Duffy MacKay
- Council for Responsible Nutrition, Washington, DC, USA
| | | | - Nigel J Walker
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Cara Welch
- US Food and Drug Administration, Silver Spring, MD, USA
| | - Cynthia V Rider
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA.
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Rozhon W, Kammermeier L, Schramm S, Towfique N, Adebimpe Adedeji N, Adesola Ajayi S, Poppenberger B. Quantification of the Pyrrolizidine Alkaloid Jacobine in Crassocephalum crepidioides by Cation Exchange High-Performance Liquid Chromatography. PHYTOCHEMICAL ANALYSIS : PCA 2018; 29:48-58. [PMID: 28836707 DOI: 10.1002/pca.2713] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 07/03/2017] [Accepted: 07/04/2017] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Pyrrolizidine alkaloids (PAs) are secondary plant metabolites with considerable hepatoxic, tumorigenic and genotoxic potential. For separation, reversed phase chromatography is commonly used because of its excellent compatibility with detection by mass spectrometry. However, reversed phase chromatography has a low selectivity for PAs. OBJECTIVE The objective of this work was to investigate the suitability of cation exchange chromatography for separation of PAs and to develop a rapid method for quantification of jacobine in Crassocephalum crepidioides that is suitable for analysis of huge sample numbers as required for mutant screening procedures. RESULTS We demonstrate that cation exchange chromatography offers excellent selectivity for PAs allowing their separation from most other plant metabolites. Due to the high selectivity, plant extracts can be directly analysed after simple sample preparation. Detection with UV at 200 nm instead of mass spectrometry can be applied, which makes the method very simple and cost-effective. The recovery rate of the method exceeded 95%, the intra-day and inter-day standard deviations were below 7% and the limit of detection and quantification were 1 mg/kg and 3 mg/kg, respectively. CONCLUSION The developed method is sufficiently sensitive for reproducible detection of jacobine in C. crepidioides. Simple sample preparation and rapid separation allows for quantification of jacobine in plant material in a high-throughput manner. Thus, the method is suitable for genetic screenings and may be applicable for other plant species, for instance Jacobaea maritima. In addition, our results show that C. crepidioides cannot be considered safe for human consumption. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- Wilfried Rozhon
- Biotechnology of Horticultural Crops, Technische Universität München, Liesel-Beckmann-Straße 1, 85354, Freising-Weihenstephan, Germany
| | - Lukas Kammermeier
- Biotechnology of Horticultural Crops, Technische Universität München, Liesel-Beckmann-Straße 1, 85354, Freising-Weihenstephan, Germany
| | - Sebastian Schramm
- Biotechnology of Horticultural Crops, Technische Universität München, Liesel-Beckmann-Straße 1, 85354, Freising-Weihenstephan, Germany
| | - Nayeem Towfique
- Biotechnology of Horticultural Crops, Technische Universität München, Liesel-Beckmann-Straße 1, 85354, Freising-Weihenstephan, Germany
| | - N Adebimpe Adedeji
- Department of Crop Production and Protection, Obafemi Awolowo University, PMB 013, Ilé-Ifè, 220005, Nigeria
| | - S Adesola Ajayi
- Department of Crop Production and Protection, Obafemi Awolowo University, PMB 013, Ilé-Ifè, 220005, Nigeria
| | - Brigitte Poppenberger
- Biotechnology of Horticultural Crops, Technische Universität München, Liesel-Beckmann-Straße 1, 85354, Freising-Weihenstephan, Germany
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Mulder PPJ, López P, Castellari M, Bodi D, Ronczka S, Preiss-Weigert A, These A. Occurrence of pyrrolizidine alkaloids in animal- and plant-derived food: results of a survey across Europe. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 35:118-133. [PMID: 28942718 DOI: 10.1080/19440049.2017.1382726] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Pyrrolizidine alkaloids (PAs) are secondary metabolites of plant families such as Asteraceae or Boraginaceae and are suspected to be genotoxic carcinogens. Recent investigations revealed their frequent occurrence in honey and particularly in tea. To obtain a comprehensive overview of the PA content in animal- and plant-derived food from the European market, and to provide a basis for future risk analysis, a total of 1105 samples were collected in 2014 and 2015. These comprised milk and milk products, eggs, meat and meat products, (herbal) teas, and (herbal) food supplements collected in supermarkets, retail shops, and via the internet. PAs were detected in a large proportion of plant-derived foods: 91% of the (herbal) teas and 60% of the food supplements contained at least one individual PA. All types of (herbal) teas investigated were found to contain PAs, with a mean concentration of 460 µg kg-1 dry tea (corresponding to 6.13 µg L-1 in [herbal] tea infusion). The highest mean concentrations were found in rooibos tea (599 µg kg-1 dry tea, 7.99 µg L-1 tea infusion) and the lowest in camomile tea (274 µg kg-1 dry tea, 3.65 µg L-1 tea infusion). Occurrence of PAs in food supplements was found to be highly variable, but in comparable ranges as for (herbal) tea. The highest concentrations were present in supplements containing plant material from known PA-producing plants. In contrast, only 2% of the animal-derived products, in particular 6% of milk samples and 1% of egg samples, contained PAs. Determined levels in milk were relatively low, ranged between 0.05 and 0.17 µg L-1 and only trace amounts of 0.10-0.12 µg kg-1 were found in eggs. No PAs were detected in the other animal-derived products.
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Affiliation(s)
- Patrick P J Mulder
- a RIKILT Wageningen University & Research , Wageningen , The Netherlands
| | - Patricia López
- a RIKILT Wageningen University & Research , Wageningen , The Netherlands
| | - Massimo Castellari
- b Institute for Research and Technology in Food and Agriculture (IRTA) , Monells , Spain
| | - Dorina Bodi
- c Department of Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| | - Stefan Ronczka
- c Department of Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| | - Angelika Preiss-Weigert
- c Department of Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| | - Anja These
- c Department of Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
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Nardin T, Piasentier E, Barnaba C, Larcher R. Alkaloid profiling of herbal drugs using high resolution mass spectrometry. Drug Test Anal 2017; 10:423-448. [PMID: 28730714 DOI: 10.1002/dta.2252] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 07/17/2017] [Accepted: 07/18/2017] [Indexed: 01/09/2023]
Abstract
Herbal infusions are consumed worldwide thanks to their "natural" beneficial effects, also due to the presence of alkaloids, although these compounds can have poisonous effects. A method combining online solid-phase purification with high resolution mass spectrometry was used to define the alkaloid profiles of 117 herbs and 7 commercial blends. Forty-one alkaloids were quantified in reference to analytical standards, while the presence of a further 116 was confirmed based on accurate mass, retention time, and fragmentation profile. The targeted study showed that 52% of herbs and 42% of commercial blends contained at least one alkaloid. Pyrrolizidines were the most commonly present (26% of samples), with concentrations generally ranging from the quantification limit to roughly 100 μg kg-1 . Moreover, a homemade infusion was studied, finding on average 45% and 6% lower extraction for pyrrolizidine and steroidal alkaloids, respectively. Nevertheless, the migration of pyrrolizidines was confirmed. The study confirmed the frequent presence, natural or accidental, of alkaloids in commercial infusion herbs, highlighting the urgent need for routine and accurate controls.
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Affiliation(s)
- Tiziana Nardin
- Centro Trasferimento Tecnologico, Fondazione E. Mach, via E. Mach 1, 38010 San Michele all'Adige (TN), Italy
| | - Edi Piasentier
- Dipartimento di scienze agrarie ed ambientali (DISA), Università di Udine, Udine, (UD), Italy
| | - Chiara Barnaba
- Centro Trasferimento Tecnologico, Fondazione E. Mach, via E. Mach 1, 38010 San Michele all'Adige (TN), Italy
| | - Roberto Larcher
- Centro Trasferimento Tecnologico, Fondazione E. Mach, via E. Mach 1, 38010 San Michele all'Adige (TN), Italy
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Robertson J, Stevens K. Pyrrolizidine alkaloids: occurrence, biology, and chemical synthesis. Nat Prod Rep 2017; 34:62-89. [PMID: 27782262 DOI: 10.1039/c5np00076a] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Covering: 2013 up to the end of 2015This review covers the isolation and structure of new pyrrolizidines; pyrrolizidine biosynthesis; biological activity, including the occurrence of pyrrolizidines as toxic components or contaminants in foods and beverages; and formal and total syntheses of naturally-occurring pyrrolizidine alkaloids and closely related non-natural analogues.
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Affiliation(s)
- Jeremy Robertson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
| | - Kiri Stevens
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
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29
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Chung SWC, Lam ACH. Investigation of pyrrolizidine alkaloids including their respective N-oxides in selected food products available in Hong Kong by liquid chromatography electrospray ionisation mass spectrometry. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 34:1184-1192. [DOI: 10.1080/19440049.2017.1319579] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Stephen W. C. Chung
- Food and Environmental Hygiene Department, Food Research Laboratory, Hong Kong (SAR), China
| | - Aaron C. H. Lam
- Food and Environmental Hygiene Department, Food Research Laboratory, Hong Kong (SAR), China
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30
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Fu PP. Pyrrolizidine Alkaloids: Metabolic Activation Pathways Leading to Liver Tumor Initiation. Chem Res Toxicol 2016; 30:81-93. [DOI: 10.1021/acs.chemrestox.6b00297] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter P. Fu
- National Center for Toxicological
Research, U.S. Food and Drug Administration, Jefferson, Arkansas 72079, United States
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31
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Valese AC, Molognoni L, de Sá Ploêncio LA, de Lima FG, Gonzaga LV, Górniak SL, Daguer H, Barreto F, Oliveira Costa AC. A fast and simple LC-ESI-MS/MS method for detecting pyrrolizidine alkaloids in honey with full validation and measurement uncertainty. Food Control 2016. [DOI: 10.1016/j.foodcont.2016.02.050] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Shimshoni JA, Duebecke A, Mulder PPJ, Cuneah O, Barel S. Pyrrolizidine and tropane alkaloids in teas and the herbal teas peppermint, rooibos and chamomile in the Israeli market. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2015; 32:2058-67. [PMID: 26365752 DOI: 10.1080/19440049.2015.1087651] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Dehydro pyrrolizidine alkaloids (dehydro PAs) are carcinogenic phytotoxins prevalent in the Boraginaceae, Asteraceae and Fabaceae families. Dehydro PAs enter the food and feed chain by co-harvesting of crops intended for human and animal consumption as well as by carry-over into animal-based products such as milk, eggs and honey. Recently the occurrence of dehydro PAs in teas and herbal teas has gained increasing attention from the EU, due to the high levels of dehydro PAs found in commercially available teas and herbal teas in Germany and Switzerland. Furthermore, several tropane alkaloids (TAs, e.g. scopolamine and hyoscyamine) intoxications due to the consumption of contaminated herbal teas were reported in the literature. The aim of the present study was to determine the dehydro PAs and TAs levels in 70 pre-packed teabags of herbal and non-herbal tea types sold in supermarkets in Israel. Chamomile, peppermint and rooibos teas contained high dehydro PAs levels in almost all samples analysed. Lower amounts were detected in black and green teas, while no dehydro PAs were found in fennel and melissa herbal teas. Total dehydro PAs concentrations in chamomile, peppermint and rooibos teas ranged from 20 to 1729 μg/kg. Except for black tea containing only mono-ester retrorsine-type dehydro PAs, all other teas and herbal teas showed mixed patterns of dehydro PA ester types, indicating a contamination by various weed species during harvesting and/or production. The TA levels per teabag were below the recommended acute reference dose; however, the positive findings of TAs in all peppermint tea samples warrant a more extensive survey. The partially high levels of dehydro PAs found in teas and herbal teas present an urgent warning letter to the regulatory authorities to perform routine quality control analysis and implement maximum residual levels for dehydro PAs.
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Affiliation(s)
- Jakob Avi Shimshoni
- a Kimron Veterinary Institute , Department of Toxicology , Bet Dagan , Israel
| | | | | | - Olga Cuneah
- a Kimron Veterinary Institute , Department of Toxicology , Bet Dagan , Israel
| | - Shimon Barel
- a Kimron Veterinary Institute , Department of Toxicology , Bet Dagan , Israel
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Huybrechts B, Callebaut A. Pyrrolizidine alkaloids in food and feed on the Belgian market. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2015; 32:1939-51. [DOI: 10.1080/19440049.2015.1086821] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Colegate SM, Boppré M, Monzón J, Betz JM. Pro-toxic dehydropyrrolizidine alkaloids in the traditional Andean herbal medicine "asmachilca". JOURNAL OF ETHNOPHARMACOLOGY 2015; 172:179-94. [PMID: 26087231 PMCID: PMC4523498 DOI: 10.1016/j.jep.2015.06.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 06/04/2015] [Accepted: 06/05/2015] [Indexed: 05/19/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Asmachilca is a Peruvian medicinal herb preparation ostensibly derived from Aristeguietia gayana (Wedd.) R.M. King & H. Rob. (Asteraceae: Eupatorieae). Decoctions of the plant have a reported bronchodilation effect that is purported to be useful in the treatment of respiratory allergies, common cold and bronchial asthma. However, its attractiveness to pyrrolizidine alkaloid-pharmacophagous insects indicated a potential for toxicity for human consumers. AIM OF THE STUDY To determine if commercial asmachilca samples, including fully processed herbal teas, contain potentially toxic 1,2-dehydropyrrolizidine alkaloids. MATERIALS AND METHODS Two brands of "Asmachilca" herbal tea bags and four other commercial samples of botanical materials for preparing asmachilca medicine were extracted and analyzed using HPLC-esi(+)MS and MS/MS for the characteristic retention times and mass spectra of known dehydropyrrolizidine alkaloids. Other suspected dehydropyrrolizidine alkaloids were tentatively identified based on MS/MS profiles and high resolution molecular weight determinations. Further structure elucidation of isolated alkaloids was based on 1D and 2D NMR spectroscopy. RESULTS Asmachilca attracted many species of moths which are known to pharmacophagously gather dehydropyrrolizidine alkaloids. Analysis of 5 of the asmachilca samples revealed the major presence of the dehydropyrrolizidine alkaloid monoesters rinderine and supinine, and their N-oxides. The 6th sample was very similar but did not contain supinine or its N-oxide. Small quantities of other dehydropyrrolizidine alkaloid monoesters, including echinatine and intermedine, were also detected. In addition, two major metabolites, previously undescribed, were isolated and identified as dehydropyrrolizidine alkaloid monoesters with two "head-to-tail" linked viridifloric and/or trachelanthic acids. Estimates of total pyrrolizidine alkaloid and N-oxide content in the botanical components of asmachilca varied from 0.4% to 0.9% (w/dw, dry weight) based on equivalents of lycopsamine. The mean pyrrolizidine alkaloid content of a hot water infusion of a commercial asmachilca herbal tea bag was 2.2±0.5mg lycopsamine equivalents. Morphological and chemical evidence showed that asmachilca is prepared from different plant species. CONCLUSIONS All asmachilca samples and the herbal tea infusions contained toxicologically-relevant concentrations of pro-toxic 1,2-dehydropyrrolizidine alkaloid esters and, therefore, present a risk to the health of humans. This raises questions concerning the ongoing unrestricted availability of such products on the Peruvian and international market. In addition to medical surveys of consumers of asmachilca, in the context of chronic disease potentially associated with ingestion of the dehydropyrrolizidine alkaloids, the botanical origins of asmachilca preparations require detailed elucidation.
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Affiliation(s)
- Steven M Colegate
- USDA, ARS, Poisonous Plant Research Laboratory, Logan, UT 84341, USA; Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT 84322, USA.
| | - Michael Boppré
- Forstzoologie und Entomologie, Albert-Ludwigs-Universität, D-79085 Freiburg, Germany
| | - Julio Monzón
- Forstzoologie und Entomologie, Albert-Ludwigs-Universität, D-79085 Freiburg, Germany
| | - Joseph M Betz
- Office of Dietary Supplements, National Institutes of Health, 6100 Executive Blvd., Room 3B01, Bethesda, MD 20892, USA
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35
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Mulder PP, Sánchez PL, These A, Preiss‐Weigert A, Castellari M. Occurrence of Pyrrolizidine Alkaloids in food. ACTA ACUST UNITED AC 2015. [DOI: 10.2903/sp.efsa.2015.en-859] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
| | | | - Anja These
- Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | | | - Massimo Castellari
- Institute for Research and Technology in Food and Agriculture (IRTA), Monells, Spain
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36
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Effective application of freezing lipid precipitation and SCX-SPE for determination of pyrrolizidine alkaloids in high lipid foodstuffs by LC-ESI-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 992:56-66. [DOI: 10.1016/j.jchromb.2015.04.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 04/03/2015] [Accepted: 04/05/2015] [Indexed: 11/20/2022]
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Schulz M, Meins J, Diemert S, Zagermann-Muncke P, Goebel R, Schrenk D, Schubert-Zsilavecz M, Abdel-Tawab M. Detection of pyrrolizidine alkaloids in German licensed herbal medicinal teas. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2015; 22:648-656. [PMID: 26055130 DOI: 10.1016/j.phymed.2015.03.020] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 02/26/2015] [Accepted: 03/23/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Because of the hepatotoxic, mutagenic, and cancerogenic effects of pyrrolizidine alkaloids (PAs) the German Federal Institute for Risk Assessment (BfR) recommends not to exceed a daily PA intake of 0.007 µg/kg body weight (0.42 µg/60 kg adult). In a recent study conducted by the BfR, up to 5647 µg PA/kg dried herbal material were detected in tea products marketed as food. PURPOSE The present study aimed at elucidating whether medicinal teas licensed or registered as medicinal products contain PAs as well. STUDY DESIGN One hundred sixty-nine different commercially available medicinal teas, i.e. 19 nettle (Urtica dioica L.), 12 fennel (Foeniculum vulgare Mill.), 14 chamomile (Matricaria recutita L.), 11 melissa (Melissa officinalis L.) and 4 peppermint (Mentha piperita L.) teas as well as 109 tea mixtures were analyzed for the presence of 23 commercially available PAs. METHOD LC/MS was used for the determination of the PAs RESULTS In general, the total PA contents ranging 0-5668 µg/kg. Thirty percent of the tested single-ingredient tea products and 56.9% of the tested medicinal tea mixtures were found to contain PA concentrations above the limit of quantification (LOQ) of 10 µg/kg. In 11 medicinal teas PA contents >300 µg/kg dry herb were determined thus exceeding the recommended limit for PA intake by BfR. In addition three products of the investigated tea mixtures revealed extremely high PA contents of 4227, 5137, and 5668 µg/kg. Generally, single-ingredient tea products contained much less or even no detectable amounts of PAs when compared to the tea mixtures. PAs in the range between 13 and 1080 µg/kg were also detected in five analyzed aqueous herbal infusions of the medicinal tea mixture products with the highest PA content. Two out of the five investigated herbal infusions exceeded the recommended BfR limit for PA intake. CONCLUSION This study demonstrates clearly that also medicinal teas licensed as medicinal products may partly contain high amounts of PAs exceeding current recommendations. For that reason manufacturers are advised to carry out more rigorous quality control tests devoted to the detection of PAs. This is very important to minimize PAs in medicinal teas accounting for possible additional exposure of the consumer to PAs from other food sources (e.g. honey).
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Affiliation(s)
- M Schulz
- Drug Commission of German Pharmacists (AMK), Jaegerstrasse 49/50, 10117 Berlin, Germany
| | - J Meins
- Central Laboratory of German Pharmacists, Carl-Mannich-Strasse 20, 65760 Eschborn, Germany
| | - S Diemert
- Drug Commission of German Pharmacists (AMK), Jaegerstrasse 49/50, 10117 Berlin, Germany
| | - P Zagermann-Muncke
- Drug Commission of German Pharmacists (AMK), Jaegerstrasse 49/50, 10117 Berlin, Germany
| | - R Goebel
- Drug Commission of German Pharmacists (AMK), Jaegerstrasse 49/50, 10117 Berlin, Germany
| | - D Schrenk
- Department of Food Chemistry and Toxicology, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse, 67663 Kaiserslautern, Germany
| | - M Schubert-Zsilavecz
- Central Laboratory of German Pharmacists, Carl-Mannich-Strasse 20, 65760 Eschborn, Germany; Department of Pharmaceutical Chemistry, Goethe-University Frankfurt, Max-von-Laue Strasse 9, 60438 Frankfurt am Main, Germany
| | - M Abdel-Tawab
- Central Laboratory of German Pharmacists, Carl-Mannich-Strasse 20, 65760 Eschborn, Germany.
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