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Dearing MD, Weinstein SB. Metabolic Enabling and Detoxification by Mammalian Gut Microbes. Annu Rev Microbiol 2022; 76:579-596. [PMID: 35671535 DOI: 10.1146/annurev-micro-111121-085333] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The longstanding interactions between mammals and their symbionts enable thousands of mammal species to consume herbivorous diets. The microbial communities in mammals degrade both plant fiber and toxins. Microbial toxin degradation has been repeatedly documented in domestic ruminants, but similar work in wild mammals is more limited due to constraints on sampling and manipulating the microbial communities in these species. In this review, we briefly describe the toxins commonly encountered in mammalian diets, major classes of biotransformation enzymes in microbes and mammals, and the gut chambers that house symbiotic microbes. We next examine evidence for microbial detoxification in domestic ruminants before providing case studies on microbial toxin degradation in both foregut- and hindgut-fermenting wild mammals. We end by discussing species that may be promising for future investigations, and the advantages and limitations of approaches currently available for studying degradation of toxins by mammalian gut microbes. Expected final online publication date for the Annual Review of Microbiology, Volume 76 is September 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- M Denise Dearing
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, USA;
| | - Sara B Weinstein
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, USA;
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2
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Yeung KA, Chai PR, Russell BL, Erickson TB. Avian Toxins and Poisoning Mechanisms. J Med Toxicol 2022; 18:321-333. [PMID: 35474563 PMCID: PMC9492810 DOI: 10.1007/s13181-022-00891-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 03/08/2022] [Accepted: 03/18/2022] [Indexed: 12/04/2022] Open
Abstract
All around the world, there are species of birds that have developed the ability to acquire toxic chemicals in their bodies making them less palatable or even lethal when consumed or contacted. Exposure to poisonous bird species is rare among humans, yet their poisons can produce serious clinical outcomes. In this study, we conducted a literature search focusing on seven avian species: the pitohuis (Pitohui spp.), blue-capped ifrita (Ifrita kowaldi), European quail (Cortunix corturnix coturnix), spur or spoor-winged goose (Plectropterus gambensis), North American ruffed grouse (Bonasa umbellus), Brush bronzewings (Phaps elegans), and European hoopoes and woodhoopoes (Upupa epops and Phoeniculus purpureus, respectively). We present the geographic distribution of each poisonous bird, toxin physiology and origin, clinical signs and symptoms of poisoning, cases of human toxicity if available and discuss the birds’ ability to prevent self-intoxication. Our results suggest that most cases of contact with toxic birds produce mild symptoms as most of these birds apart from the European quail (C. c. corturnix) and North American ruffed grouse (B. umbellus) are not commonly consumed by humans. Furthermore, we discuss several methods of toxin acquisition in these bird species, which are mostly diet acquired apart from the hoopoes and woodhoopoes (Upupa and Phoeniculus spp.) who have a symbiotic relationship with chemical-producing bacteria in their uropygial glands. In summary, our study provides a comprehensive review of the toxic physiology, clinical manifestations, and evolutionary insight to avian toxins.
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Affiliation(s)
- Kara A Yeung
- Harvard Affiliated Emergency Medicine Residency (HAEMR) Program, Mass General Brigham, Boston, MA, USA
| | - Peter R Chai
- Department of Emergency Medicine, Division of Medical Toxicology, Mass General Brigham, Vining St. Neville House Boston, Boston, MA, 02115, USA.,The Fenway Institute, Boston, MA, USA.,The Koch Institute for Integrated Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA.,Division of Psychosocial Oncology and Palliative Care, Dana Farber Cancer Institute, Boston, MA, USA
| | - Brendan L Russell
- Department of Emergency Medicine, Division of Medical Toxicology, Mass General Brigham, Vining St. Neville House Boston, Boston, MA, 02115, USA
| | - Timothy B Erickson
- Department of Emergency Medicine, Division of Medical Toxicology, Mass General Brigham, Vining St. Neville House Boston, Boston, MA, 02115, USA. .,Harvard Humanitarian Institute, Cambridge, MA, USA.
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3
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Barros ALAN, Hamed A, Marani M, Moreira DC, Eaton P, Plácido A, Kato MJ, Leite JRSA. The Arsenal of Bioactive Molecules in the Skin Secretion of Urodele Amphibians. Front Pharmacol 2022; 12:810821. [PMID: 35095522 PMCID: PMC8795703 DOI: 10.3389/fphar.2021.810821] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 12/24/2021] [Indexed: 11/20/2022] Open
Abstract
Urodele amphibians (∼768 spp.), salamanders and newts, are a rich source of molecules with bioactive properties, especially those isolated from their skin secretions. These include pharmacological attributes, such as antimicrobial, antioxidant, vasoactive, immune system modulation, and dermal wound healing activities. Considering the high demand for new compounds to guide the discovery of new drugs to treat conventional and novel diseases, this review summarizes the characteristics of molecules identified in the skin of urodele amphibians. We describe urodele-derived peptides and alkaloids, with emphasis on their biological activities, which can be considered new scaffolds for the pharmaceutical industry. Although much more attention has been given to anurans, bioactive molecules produced by urodeles have the potential to be used for biotechnological purposes and stand as viable alternatives for the development of therapeutic agents.
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Affiliation(s)
- Ana L A N Barros
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil.,Programa de Pós-graduação em Medicina Tropical, PPGMT, Núcleo de Medicina Tropical, NMT, Faculdade de Medicina, UnB, Brasília, Brazil
| | - Abdelaaty Hamed
- Instituto de Química, IQ, Universidade de São Paulo, São Paulo, Brazil.,Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City-Cairo, Egypt
| | - Mariela Marani
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Puerto Madryn, Argentina
| | - Daniel C Moreira
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil
| | - Peter Eaton
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal.,Joseph Banks Laboratories, The Bridge, School of Chemistry, University of Lincoln, Lincoln, United Kingdom
| | - Alexandra Plácido
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal.,Bioprospectum, Lda, UPTEC, Porto, Portugal
| | - Massuo J Kato
- Instituto de Química, IQ, Universidade de São Paulo, São Paulo, Brazil
| | - José Roberto S A Leite
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil.,Programa de Pós-graduação em Medicina Tropical, PPGMT, Núcleo de Medicina Tropical, NMT, Faculdade de Medicina, UnB, Brasília, Brazil.,Bioprospectum, Lda, UPTEC, Porto, Portugal
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4
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Bókony V, Móricz ÁM, Tóth Z, Gál Z, Kurali A, Mikó Z, Pásztor K, Szederkényi M, Tóth Z, Ujszegi J, Üveges B, Krüzselyi D, Capon RJ, Hoi H, Hettyey A. Variation in Chemical Defense Among Natural Populations of Common Toad, Bufo bufo, Tadpoles: the Role of Environmental Factors. J Chem Ecol 2016; 42:329-38. [PMID: 27059330 DOI: 10.1007/s10886-016-0690-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Revised: 01/20/2016] [Accepted: 03/29/2016] [Indexed: 01/19/2023]
Abstract
Defensive toxins are widespread in nature, yet we know little about how various environmental factors shape the evolution of chemical defense, especially in vertebrates. In this study we investigated the natural variation in the amount and composition of bufadienolide toxins, and the relative importance of ecological factors in predicting that variation, in larvae of the common toad, Bufo bufo, an amphibian that produces toxins de novo. We found that tadpoles' toxin content varied markedly among populations, and the number of compounds per tadpole also differed between two geographical regions. The most consistent predictor of toxicity was the strength of competition, indicating that tadpoles produced more compounds and larger amounts of toxins when coexisting with more competitors. Additionally, tadpoles tended to contain larger concentrations of bufadienolides in ponds that were less prone to desiccation, suggesting that the costs of toxin production can only be afforded by tadpoles that do not need to drastically speed up their development. Interestingly, this trade-off was not alleviated by higher food abundance, as periphyton biomass had negligible effect on chemical defense. Even more surprisingly, we found no evidence that higher predation risk enhances chemical defenses, suggesting that low predictability of predation risk and high mortality cost of low toxicity might select for constitutive expression of chemical defense irrespective of the actual level of predation risk. Our findings highlight that the variation in chemical defense may be influenced by environmental heterogeneity in both the need for, and constraints on, toxicity as predicted by optimal defense theory.
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Affiliation(s)
- Veronika Bókony
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary.
| | - Ágnes M Móricz
- Department of Pathophysiology, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary
| | - Zsófia Tóth
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary
| | - Zoltán Gál
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary.,Agricultural Biotechnology Institute, NARIC, Szentgyörgyi Albert u. 4, H-2100, Gödöllő, Hungary
| | - Anikó Kurali
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary
| | - Zsanett Mikó
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary
| | - Katalin Pásztor
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary
| | - Márk Szederkényi
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary.,Department of Integrative Biology and Evolution, Konrad Lorenz Institute of Ethology, University of Veterinary Medicine, Savoyenstrasse 1, 1160, Vienna, Austria
| | - Zoltán Tóth
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary
| | - János Ujszegi
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary
| | - Bálint Üveges
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary.,Department of Integrative Biology and Evolution, Konrad Lorenz Institute of Ethology, University of Veterinary Medicine, Savoyenstrasse 1, 1160, Vienna, Austria
| | - Dániel Krüzselyi
- Department of Pathophysiology, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary
| | - Robert J Capon
- Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, 4072, Australia
| | - Herbert Hoi
- Department of Integrative Biology and Evolution, Konrad Lorenz Institute of Ethology, University of Veterinary Medicine, Savoyenstrasse 1, 1160, Vienna, Austria
| | - Attila Hettyey
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó u. 15, H-1022, Budapest, Hungary
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