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Marin-Tun CG, Torres-Acosta JFDJ, Capetillo-Leal CM, Sandoval-Castro CA, Hoste H, Borges-Argáez R, Mancilla-Montelongo MG. The in vitro rumen exsheathment test for studying the effect of plant extracts on the exsheathment of Haemonchus contortus infective larvae. Vet Parasitol 2024; 328:110184. [PMID: 38643645 DOI: 10.1016/j.vetpar.2024.110184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/09/2024] [Accepted: 04/09/2024] [Indexed: 04/23/2024]
Abstract
This study applied the in vitro rumen exsheathment test (IVRET) to evaluate the exsheathment kinetics of Haemonchus contortus infective larvae (L3) incubated in ruminal liquor (RL) containing acetone:water extracts of Acacia pennatula (AP), Gymnopodium floribundum (GF), Havardia albicans (HA) or Lysiloma latisiliquum (LL). The role of polyphenols in the biological activity of the evaluated extracts was also determined. Larvae were incubated in RL either alone or added with a different plant extract (AP, GF, HA, or LL) at 1200 μg/mL. Polyethylene glycol (PEG) was added to block polyphenols in each treatment (RL+PEG, AP+PEG, GF+PEG, HA+PEG, and LL+PEG). After incubation times of 0, 1, 3, 6, 9, and 24 h, the exsheathment process was stopped to count the number of ensheathed and exsheathed L3. A Log-Logistic model was used to determine the L3 exsheathment kinetics in the different RL treatments. The inflection point of the respective kinetic curves, which indicates the time to reach 50 % exsheathed L3 (T50), was the only parameter that differed when comparing the exsheathment models (99 % probability of difference). The T50 values obtained for GF, HA, and LL treatments (T50 = 7.11 - 7.58 h) were higher in comparison to the T50 of RL (5.72 h) (≥ 70 % probability of difference). The L3 incubated in RL added with GF, HA, and LL extracts delayed their exsheathment at 3 and 6 h of incubation (28.71 - 48.06 % exsheathment reduction) compared to the RL treatment. The T50 value for AP, AP+PEG, GF+PEG, HA+PEG, and LL+PEG were similar to RL and RL+PEG (T50 = 5.34 - 6.97 h). In conclusion, the IVRET can be used to identify plants with the potential to delay the exsheathment of H. contortus L3 in the ruminal liquor. The acetone:water extracts of G. floribundum, H. albicans, and L. latisiliquum delayed the T50 of H. contortus exsheathment, which was evident at 3 and 6 h of incubation in ruminal liquor. The observed exsheathment delay was attributed to the polyphenol content of the extracts.
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Affiliation(s)
- Cindy Goretti Marin-Tun
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico
| | - Juan Felipe de Jesús Torres-Acosta
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico
| | - Concepción Manuela Capetillo-Leal
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico
| | - Carlos Alfredo Sandoval-Castro
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico
| | - Hervé Hoste
- INRAE UMR 1225 Interactions Hôte Agents Pathogènes, 23 Chemin des Capelles, Toulouse F31076, France
| | - Rocío Borges-Argáez
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130 Colonia Chuburná de Hidalgo, Yucatán, Mérida C.P. 97200, Mexico
| | - María Gabriela Mancilla-Montelongo
- CONAHCYT - Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico.
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Klein LM, Lamp J, Schopf C, Gabler AM, Kaltner F, Guldimann C, Rychlik M, Schwake-Anduschus C, Knappstein K, Gottschalk C. Pyrrolizidine alkaloids and tropane alkaloids in milk samples from individual dairy farms of the German federal states of Bavaria and Schleswig-Holstein. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2024:1-19. [PMID: 38592240 DOI: 10.1080/19440049.2024.2336054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 03/24/2024] [Indexed: 04/10/2024]
Abstract
1,2-Dehydro-pyrrolizidine alkaloids (PA), their corresponding N-oxides (PANO) and tropane alkaloids (TA), are toxic plant metabolites. If plant material, containing these toxins, is present in the feed of dairy cows these toxins can be transferred into milk. Here, milk was sampled directly from dairy farms in the German federal states of Bavaria and Schleswig-Holstein in 2020-2022 in order to investigate a possible contamination of milk at the production stage. In total, 228 milk samples were analysed for 54 PA/PANO and two TA by a sensitive LC-ESI-MS/MS method. In addition, a subset of milk samples (n = 85) was independently analysed for TA by a cooperating laboratory for verification. PA/PANO were found in 26 samples (11%) with a low median sum content of the contaminated samples of 0.024 µg/L. The highest level of contamination was 5.6 µg/L. Senecionine-, lycopsamine- and heliotrine-type PA/PANO were detected. In four samples (1.8%), atropine was determined up to 0.066 µg/L. The toxin levels in the milk samples hardly contributed to the total daily exposure. These data are first-time results on contamination rates and levels occurring in milk from individual dairy farms, based on a large sample number.
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Affiliation(s)
- Lisa Monika Klein
- Chair of Food Safety and Analytics, Faculty of Veterinary Medicine, LMU in Munich, Munich, Germany
- Chair of Analytical Food Chemistry, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Julika Lamp
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Kiel, Germany
| | - Christina Schopf
- Chair of Food Safety and Analytics, Faculty of Veterinary Medicine, LMU in Munich, Munich, Germany
- Chair of Analytical Food Chemistry, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Angelika Miriam Gabler
- Chair of Food Safety and Analytics, Faculty of Veterinary Medicine, LMU in Munich, Munich, Germany
| | - Florian Kaltner
- Chair of Food Safety and Analytics, Faculty of Veterinary Medicine, LMU in Munich, Munich, Germany
| | - Claudia Guldimann
- Chair of Food Safety and Analytics, Faculty of Veterinary Medicine, LMU in Munich, Munich, Germany
| | - Michael Rychlik
- Chair of Analytical Food Chemistry, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Christine Schwake-Anduschus
- Department of Safety and Quality of Cereals, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Detmold, Germany
| | - Karin Knappstein
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Kiel, Germany
| | - Christoph Gottschalk
- Chair of Food Safety and Analytics, Faculty of Veterinary Medicine, LMU in Munich, Munich, Germany
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Aboling S. Do Poisonous Plants in Pastures Communicate Their Toxicity? Meta-Study and Evaluation of Poisoning Cases in Central Europe. Animals (Basel) 2023; 13:3795. [PMID: 38136831 PMCID: PMC10740430 DOI: 10.3390/ani13243795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/09/2023] [Accepted: 11/17/2023] [Indexed: 12/24/2023] Open
Abstract
One of the possible roles of secondary plant metabolites, including toxins, is facilitating plant-animal communication. Lethal cases of pasture poisoning show that the message is not always successfully conveyed. As the focus of poisoning lies in the clinical aspects, the external circumstances of pasture poisoning are widely unknown. To document poisoning conditions in cattle, sheep, goats, and horses on pastures and to compile a checklist of plants involved in either poisoning or co-existence (zero poisoning), published case reports were evaluated as primary sources. The number of affected animal individuals was estimated within abundance classes from 0 to more than 100. The checklist of poisonous plants comprised 52 taxa. Of these, 13 taxa were deemed safe (no reference was found indicating poisoning), 11 taxa were associated with evidence-based zero poisoning (positive list), and 28 taxa were associated with poisoning (negative list). Nine plant taxa caused poisoning in more than 100 animal individuals. Zero poisoning accounted for 40% and poisoning accounted for 60% of a total of 85 cases. Poisoning was most often associated with a limited choice of feed (24.7%), followed by overgrazing (12.9%), seasonally scarce feed (10.6%), and co-ingestion of grass (4.7%). Hunger interferes with plant-animal co-existence, while zero poisoning improves it. In conclusion, poisonous plants in pastures may communicate their toxicity if the animals have enough alternative feed plants. An individual animal might utterly perceive the communication of toxicity by the plant species but be forced to ignore the message owing to a limited choice of feed options.
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Affiliation(s)
- Sabine Aboling
- Institute of Animal Nutrition, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173 Hannover, Germany
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Knoop K, Knappstein K, Kaltner F, Gabler AM, Taenzer J, These A, Kersten S, Meyer U, Frahm J, Kluess J, Hüther L, Gottschalk C, Bach Knudsen KE, Saltzmann J, Dänicke S. Short-term exposure of dairy cows to pyrrolizidine alkaloids from tansy ragwort ( Jacobaea vulgaris Gaertn.): effects on health and performance. Arch Anim Nutr 2023; 77:363-384. [PMID: 37842997 DOI: 10.1080/1745039x.2023.2261806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 09/04/2023] [Indexed: 10/17/2023]
Abstract
The increasing spread of ragworts is observed with concern. Ragworts like tansy ragwort (Jacobaea vulgaris Gaertn.) or marsh ragwort (J. aquatica) contain pyrrolizidine alkaloids (PA) which may induce hepatotoxic effects. Grazing animals usually avoid ragworts if their pasture management is appropriate. Preserved feed prepared from ragworts contaminated meadows may, however, lead to a significant exposure to PA. Previous studies on toxicity of PA for dairy cows revealed inconsistent results due to feeding ragwort plant material which was associated with heterogeneous PA exposure and thus failed to conclusively deduce critical PA doses. Therefore, the aim of the present study was to expose dairy cows (n = 4 per group) in a short-term scenario for 28 days with increasing PA doses (PA1: 0.47 mg PA/kg body weight (BW)/day (d); PA2: 0.95 mg PA/kg BW/d; PA3: 1.91 mg PA/kg BW/d) via oral administration by gavage of a defined PA-extract. While group PA3 was dosed with the PA-extract alone, groups PA2 and PA1 received PA-extracts blended in similar volumes with molasses to provide comparable amounts of sugar. Additionally, two control groups were treated either with water (CONWater) or with molasses (CONMolasses) to assess the effects of sugar without PA interference. While clinical traits including dry matter intake, milking performance, rectal body temperature, ruminal activity and body condition score (BCS) were not influenced by PA exposure, activities of enzymes indicative for liver damages, such as gamma-glutamyltransferase (GGT), aspartate aminotransferase (AST) and glutamate dehydrogenase (GLDH), increased significantly over time at an exposure of 1.91 mg total PA/kg BW/d.
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Affiliation(s)
- Kirsten Knoop
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Braunschweig, Germany
| | - Karin Knappstein
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Kiel, Germany
| | - Florian Kaltner
- Chair of Food Safety and Analytics, Ludwig-Maximilians-Universität München, Munich, Germany
- Institute of Food Chemistry and Food Biotechnology, Justus-Liebig-Universität, Giessen, Germany
| | - Angelika Miriam Gabler
- Chair of Food Safety and Analytics, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Julian Taenzer
- Department Safety in the Food Chain, German Federal Institute for Risk Assessment, Berlin, Germany
| | - Anja These
- Department Safety in the Food Chain, German Federal Institute for Risk Assessment, Berlin, Germany
| | - Susanne Kersten
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Braunschweig, Germany
| | - Ulrich Meyer
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Braunschweig, Germany
| | - Jana Frahm
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Braunschweig, Germany
| | - Jeannette Kluess
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Braunschweig, Germany
| | - Liane Hüther
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Braunschweig, Germany
| | - Christoph Gottschalk
- Chair of Food Safety and Analytics, Ludwig-Maximilians-Universität München, Munich, Germany
- Department Safety in the Food Chain, German Federal Institute for Risk Assessment, Berlin, Germany
| | | | - Janine Saltzmann
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Braunschweig, Germany
| | - Sven Dänicke
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Braunschweig, Germany
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