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Ko SM, Park JE, Heo IK, Shin YU, Kim YH, Son WC. Safety concerns regarding impurities in L-Tryptophan associated with eosinophilia myalgia syndrome. Food Chem Toxicol 2023; 179:113946. [PMID: 37453474 DOI: 10.1016/j.fct.2023.113946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 06/27/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
L-tryptophan is one of the essential amino acids in humans and across the animal kingdom. It has been widely used as a feed additive for domestic animals and is also administered through dietary supplements in humans. Safety concerns have been raised however since a disease known as eosinophilia-myalgia syndrome (EMS) was reported to be related to L-tryptophan supplements. EMS is a rare condition characterized by inflammation in various organ systems including the muscles, skin, and lungs. Through several studies, it has been speculated that the six components generated during the process of L-tryptophan synthesis are related to the induction of EMS. In this review, we discuss the history of EMS and its controversial correlation with L-tryptophan use reported in several studies. Many in vitro and in vivo studies have been conducted to assess the putative correlation between impurities in L-tryptophan preparations and EMS, but no clear and convincing conclusions have been drawn so far.
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Affiliation(s)
- Soo Min Ko
- Department of Medical Science, AMIST, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, Republic of Korea.
| | - Ji-Eun Park
- Department of Medical Science, AMIST, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, Republic of Korea; CJ CheilJedang, Suwon-si, Gyeonggi-do, 16495, Republic of Korea.
| | - In Kyung Heo
- CJ CheilJedang, Suwon-si, Gyeonggi-do, 16495, Republic of Korea.
| | - Yong Uk Shin
- CJ CheilJedang, Suwon-si, Gyeonggi-do, 16495, Republic of Korea.
| | - Yang Hee Kim
- CJ CheilJedang, Suwon-si, Gyeonggi-do, 16495, Republic of Korea.
| | - Woo-Chan Son
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, Republic of Korea.
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2
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Mannino G, Serio G, Gaglio R, Maffei ME, Settanni L, Di Stefano V, Gentile C. Biological Activity and Metabolomics of Griffonia simplicifolia Seeds Extracted with Different Methodologies. Antioxidants (Basel) 2023; 12:1709. [PMID: 37760012 PMCID: PMC10525635 DOI: 10.3390/antiox12091709] [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: 08/07/2023] [Revised: 08/26/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
Griffonia simplicifolia, a tropical plant endemic to West Africa, is highly regarded for its significant pharmacological potential. The objective of this study was to evaluate the metabolomic profile and to explore the antioxidant properties, antiproliferative activity, and antimicrobial potential of G. simplicifolia seed extracts obtained through either maceration, microwave-assisted extraction (MAE), or Soxhlet extraction using water, acetone, methanol and ethanol as solvents. Overall, methanol possessed superior total extraction efficiency. HPLC analyses confirmed the efficacy of acetone and ethanol as optimal solvents for the extraction of flavonoids and flavan-3-ols, whereas MAE exhibited enhanced effectiveness in extracting N-containing compounds, including 5-hydroxytryptophan (5-HTP). HPLC-MS analyses identified forty-three compounds, including thirty-four phenolic compounds and nine N-containing molecules. Isomyricitrin, taxifolin and a flavonol glucuronide were the main polyphenols, whereas 5-HTP was the main N-containing compound. Hydroalcoholic G. simplicifolia extracts showed the highest radical scavenging and metal-reducing antioxidant power, suggesting that most of the contribution to antioxidant activity depends on the more polar bioactive compounds. G. simplicifolia extracts showed dose-dependent antiproliferative activity against three distinct cancer cell lines (HeLa, HepG2, and MCF-7), with notable variations observed among both the different extracts and cell lines and divergent GI50 values, emphasizing substantial discrepancies in cell sensitivity to the various extracts. Furthermore, G. simplicifolia extracts revealed antibiotic activity against Staphylococcus aureus. Our results highlight the potential of G. simplicifolia phytochemicals in the development of functional foods, nutraceuticals, and dietary supplements.
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Affiliation(s)
- Giuseppe Mannino
- Plant Physiology Unit, Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/A, 10135 Turin, Italy;
| | - Graziella Serio
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Viale delle Scienze, 90128 Palermo, Italy; (G.S.); (V.D.S.)
| | - Raimondo Gaglio
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy; (R.G.); (L.S.)
| | - Massimo E. Maffei
- Plant Physiology Unit, Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/A, 10135 Turin, Italy;
| | - Luca Settanni
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy; (R.G.); (L.S.)
| | - Vita Di Stefano
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Viale delle Scienze, 90128 Palermo, Italy; (G.S.); (V.D.S.)
| | - Carla Gentile
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Viale delle Scienze, 90128 Palermo, Italy; (G.S.); (V.D.S.)
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3
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Arnao MB, Giraldo-Acosta M, Castejón-Castillejo A, Losada-Lorán M, Sánchez-Herrerías P, El Mihyaoui A, Cano A, Hernández-Ruiz J. Melatonin from Microorganisms, Algae, and Plants as Possible Alternatives to Synthetic Melatonin. Metabolites 2023; 13:metabo13010072. [PMID: 36676997 PMCID: PMC9862825 DOI: 10.3390/metabo13010072] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 12/26/2022] [Accepted: 12/30/2022] [Indexed: 01/05/2023] Open
Abstract
Melatonin dietary supplements are widely consumed worldwide, with developed countries as the largest consumers, with an estimated annual growth rate of approximately 10% until 2027, mainly in developing countries. The wide use of melatonin against sleep disorders and particular problems, such as jet lag, has been added to other applications, such as anti-aging, anti-stress, immune system activation, anticancer, and others, which have triggered its use, normally without a prescription. The chemical industry currently covers 100% of the needs of the melatonin market. Motivated by sectors with more natural consumption habits, a few years ago, the possibility of obtaining melatonin from plants, called phytomelatonin, arose. More recently, the pharmaceutical industry has developed genetically modified microorganisms whose ability to produce biological melatonin in bioreactors has been enhanced. This paper reviews the aspects of the chemical and biological synthesis of melatonin for human consumption, mainly as dietary supplements. The pros and cons of obtaining melatonin from microorganisms and phytomelatonin from plants and algae are analyzed, as well as the advantages of natural melatonin, avoiding unwanted chemical by-products from the chemical synthesis of melatonin. Finally, the economic and quality aspects of these new products, some of which are already marketed, are analyzed.
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4
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Lee DH, Kim YH, Baek M, Heo IK, Shin Y. Simultaneous determination of L-tryptophan impurities in meat products. Amino Acids 2023; 55:173-182. [PMID: 36588144 PMCID: PMC9950155 DOI: 10.1007/s00726-022-03215-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 11/14/2022] [Indexed: 01/03/2023]
Abstract
L-tryptophan has been used as a feed additive for swine and poultry and as a nutrient supplement for humans. However, some impurities in L-tryptophan have been reported as causative components of eosinophilia-myalgia syndrome. Therefore, from a safety perspective, it is important to analyze meat samples for these impurities. This study aims to develop an analytical method for the simultaneous detection of L-tryptophan impurities in meat products using LC-MS/MS. Among the various impurities, detection methods for (S)-2-amino-3-(5-hydroxy-1H-indol-3-yl)propanoic acid (5-hydroxytryptophan) (HTP), 1-methyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid (MTCA), 3a-hydroxy-1,2,3,3a,8,8a-hexahydropyrrolo-[2,3-b]-indole-2-carboxylic acid (PIC), and 1,1'-ethylidenebistryptophan (EBT) and 2-(3-indoylmethyl)-L-tryptophan (IMT) were developed. The developed method allowed simultaneous determination of these four impurities in 5 min. No interferences from the matrix were observed, and the method showed good sensitivity to each analyte. The method detection limit and limit of quantification in meat matrices were below 11.2 and 35.7 μg/kg, respectively.
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Affiliation(s)
- Doo-Hee Lee
- National Instrumentation Center for Environmental Management, Seoul National University, Seoul, 08826 Republic of Korea
| | - Yang Hee Kim
- Institute of Biotechnology, CJ CheilJedang, Suwon, Gyeonggi, 16495, Republic of Korea.
| | - Mina Baek
- Institute of Biotechnology, CJ CheilJedang, Suwon, Gyeonggi 16495 Republic of Korea
| | - In Kyung Heo
- Institute of Biotechnology, CJ CheilJedang, Suwon, Gyeonggi 16495 Republic of Korea
| | - Yonguk Shin
- Institute of Biotechnology, CJ CheilJedang, Suwon, Gyeonggi 16495 Republic of Korea
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5
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Wang X, You J, Liu A, Qi X, Li D, Zhao Y, Zhang Y, Zhang L, Zhang X, Li P. Variation in Melatonin Contents and Genetic Dissection of Melatonin Biosynthesis in Sesame. PLANTS (BASEL, SWITZERLAND) 2022; 11:2005. [PMID: 35956483 PMCID: PMC9370803 DOI: 10.3390/plants11152005] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 07/22/2022] [Accepted: 07/24/2022] [Indexed: 06/15/2023]
Abstract
In recent years, people have become increasingly interested in bioactive molecules in plants that are beneficial to human health, and melatonin (N-acetyl-5-methoxytryptamine) has attracted research attention due to its excellent performance. In this study, the content of melatonin in oilseeds was investigated. From the results, it was found that sesame is an important natural food source of melatonin intake. Furthermore, the variation in melatonin content was explored in a natural sesame population, and its contents varied from 0.04 to 298.62 ng g-1. Through a genome-wide association study (GWAS), a candidate gene SiWRKY67 was screened that regulates melatonin content in sesame. The sesame hairy root transformation system was developed and used to verify this gene, and it was found that the overexpression of SiWRKY67 could positively promote the melatonin content in the hairy roots. Our results provide not only a foundation for understanding the genetic structure of melatonin content in sesame seeds but also a reference for the marker-assisted breeding of sesame varieties with high melatonin content.
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Affiliation(s)
- Xiao Wang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
| | - Jun You
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
| | - Aili Liu
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
| | - Xin Qi
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
| | - Donghua Li
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
| | - Ya Zhao
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
| | - Yanxin Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
| | - Liangxiao Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
- Quality Inspection and Test Center for Oilseed Products, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Hubei Hongshan Laboratory, Wuhan 430070, China
| | - Xiurong Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
| | - Peiwu Li
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.W.); (A.L.); (X.Q.); (D.L.); (Y.Z.); (Y.Z.)
- Quality Inspection and Test Center for Oilseed Products, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Hubei Hongshan Laboratory, Wuhan 430070, China
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6
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Karakawa S, Smriga M, Arashida N, Nakayama A, Miyano H. Analytical Chemistry of Impurities in Amino Acids Used as Nutrients: Recommendations for Regulatory Risk Management. Nutrients 2022; 14:nu14142838. [PMID: 35889795 PMCID: PMC9319416 DOI: 10.3390/nu14142838] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/05/2022] [Accepted: 07/08/2022] [Indexed: 12/05/2022] Open
Abstract
Proteinogenic amino acids are natural nutrients ingested daily from standard foods. Commercially manufactured amino acids are added to a wide range of nutritional products, including dietary supplements and regular foods. Currently, the regulatory risk management of amino acids is conducted by means of setting daily maximum limits of intake. However, there have been no reported adverse effects of amino acid overdosing, while impurities in low-quality amino acids have been identified as causative agents in several health hazard events. This paper reviews the analytical chemistry of impurities in amino acids and highlights major variations in the purity of commercial products. Furthermore, it examines the international standards and global regulatory risk assessment of amino acids utilized in dietary supplements and foods, recommending (1) further research on analytical methods that can comprehensively separate impurities in amino acids, and (2) re-focusing on the regulatory risk management of amino acids to the analytical chemistry of impurities.
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Affiliation(s)
- Sachise Karakawa
- Research Institute for Bioscience Products & Fine Chemicals, Ajinomoto Co., Inc., Kawasaki 210-8681, Japan; (N.A.); (A.N.); (H.M.)
- Correspondence:
| | - Miro Smriga
- Quality Assurance Department, Ajinomoto Co., Inc., Tokyo 104-8315, Japan;
| | - Naoko Arashida
- Research Institute for Bioscience Products & Fine Chemicals, Ajinomoto Co., Inc., Kawasaki 210-8681, Japan; (N.A.); (A.N.); (H.M.)
| | - Akira Nakayama
- Research Institute for Bioscience Products & Fine Chemicals, Ajinomoto Co., Inc., Kawasaki 210-8681, Japan; (N.A.); (A.N.); (H.M.)
| | - Hiroshi Miyano
- Research Institute for Bioscience Products & Fine Chemicals, Ajinomoto Co., Inc., Kawasaki 210-8681, Japan; (N.A.); (A.N.); (H.M.)
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7
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Cheng G, Ma T, Deng Z, Gutiérrez-Gamboa G, Ge Q, Xu P, Zhang Q, Zhang J, Meng J, Reiter RJ, Fang Y, Sun X. Plant-derived melatonin from food: a gift of nature. Food Funct 2021; 12:2829-2849. [PMID: 33877242 DOI: 10.1039/d0fo03213a] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In recent years, people have become increasingly interested in bioactive ingredients from plants, especially antioxidant molecules such as melatonin, which are beneficial to human health. The purpose of this article is to provide new information on plant-derived foods with a high content of melatonin. We comprehensively summarize the content of melatonin in plant-derived foods and discuss the factors that influence melatonin levels to provide new ideas on enhancement. Additionally, we describe the biosynthetic pathway of melatonin and identify its major functions. Medicinal herbs are often rich in melatonin while many vegetables and fruits exhibit somewhat lower levels with wide variations among species. The genetic traits of plants, the phenological stage of the cultivar, the photoperiod, the level of stress to which the plants are exposed at the time of harvest, exposure to agrochemicals and determination methods are the main factors affecting the melatonin content. To date, standardization of uniform sampling times and the use of suitable pretreatments as well as determination methods have not been achieved. The results of the studies reviewed highlight the potentially important role of plant melatonin in influencing the progression of human diseases. Based on the health promotional aspects of melatonin, consuming foods containing higher concentrations of tryptophan and melatonin is suggested.
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Affiliation(s)
- Guo Cheng
- College of Enology, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
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8
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Bellmaine S, Schnellbaecher A, Zimmer A. Reactivity and degradation products of tryptophan in solution and proteins. Free Radic Biol Med 2020; 160:696-718. [PMID: 32911085 DOI: 10.1016/j.freeradbiomed.2020.09.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 08/06/2020] [Accepted: 09/02/2020] [Indexed: 12/13/2022]
Abstract
Tryptophan is one of the essential mammalian amino acids and is thus a required component in human nutrition, animal feeds, and cell culture media. However, this aromatic amino acid is highly susceptible to oxidation and is known to degrade into multiple products during manufacturing, storage, and processing. Many physical and chemical processes contribute to the degradation of this compound, primarily via oxidation or cleavage of the highly reactive indole ring. The central contributing factors are reactive oxygen species, such as singlet oxygen, hydrogen peroxide, and hydroxyl radicals; light and photosensitizers; metals; and heat. In a multi-component mixture, tryptophan also commonly reacts with carbonyl-containing compounds, leading to a wide variety of products. The purpose of this review is to summarize the current state of knowledge regarding the degradation and interaction products of tryptophan in complex liquid solutions and in proteins. For the purposes of context, a brief summary of the key pathways in tryptophan metabolism will be included, along with common methods and issues in tryptophan manufacturing. The review will focus on the conditions that lead to tryptophan degradation, the products generated in these processes, their known biological effects, and methods which may be applied to stabilize the amino acid.
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Affiliation(s)
- Stephanie Bellmaine
- Merck Life Science, Upstream R&D, Frankfurter Strasse 250, 64293, Darmstadt, Germany
| | - Alisa Schnellbaecher
- Merck Life Science, Upstream R&D, Frankfurter Strasse 250, 64293, Darmstadt, Germany
| | - Aline Zimmer
- Merck Life Science, Upstream R&D, Frankfurter Strasse 250, 64293, Darmstadt, Germany.
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9
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Piera-Velazquez S, Wermuth PJ, Gomez-Reino JJ, Varga J, Jimenez SA. Chemical exposure-induced systemic fibrosing disorders: Novel insights into systemic sclerosis etiology and pathogenesis. Semin Arthritis Rheum 2020; 50:1226-1237. [PMID: 33059296 DOI: 10.1016/j.semarthrit.2020.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/19/2020] [Accepted: 09/09/2020] [Indexed: 01/19/2023]
Abstract
Numerous drugs and chemical substances are capable of inducing exaggerated tissue fibrotic responses. The vast majority of these agents cause localized fibrotic tissue reactions or fibrosis confined to specific organs. Although much less frequent, chemically-induced systemic fibrotic disorders have been described, sometimes occurring as temporally confined outbreaks. These include the Toxic Oil Syndrome (TOS), the Eosinophilia-Myalgia Syndrome (EMS), and Nephrogenic Systemic Fibrosis (NSF). Although each of these disorders displays some unique characteristics, they all share crucial features with Systemic Sclerosis (SSc), the prototypic idiopathic systemic fibrotic disease, including vasculopathy, chronic inflammatory cell infiltration of affected tissues, and cutaneous and visceral tissue fibrosis. The study of the mechanisms and molecular alterations involved in the development of the chemically-induced systemic fibrotic disorders has provided valuable clues that may allow elucidation of SSc etiology and pathogenesis. Here, we review relevant aspects of the TOS, EMS, and NSF epidemic outbreaks of chemically-induced systemic fibrosing disorders that provide strong support to the hypothesis that SSc is caused by a toxic or biological agent that following its internalization by endothelial cells induces in genetically predisposed individuals a series of molecular alterations that result in the development of SSc clinical and pathological alterations.
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Affiliation(s)
- Sonsoles Piera-Velazquez
- Jefferson Institute of Molecular Medicine and Scleroderma Center, Thomas Jefferson University, Philadelphia, PA, United States
| | - Peter J Wermuth
- Jefferson Institute of Molecular Medicine and Scleroderma Center, Thomas Jefferson University, Philadelphia, PA, United States
| | - Juan J Gomez-Reino
- Fundacion IDIS, Instituto de Investigacion Sanitaria, Hospital Clinico Universitario, Santiago de Compostela, Spain
| | - John Varga
- Rheumatology Division, North Western Scleroderma Program, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Sergio A Jimenez
- Jefferson Institute of Molecular Medicine and Scleroderma Center, Thomas Jefferson University, Philadelphia, PA, United States
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10
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Development of a Phytomelatonin-Rich Extract from Cultured Plants with Excellent Biochemical and Functional Properties as an Alternative to Synthetic Melatonin. Antioxidants (Basel) 2020; 9:antiox9020158. [PMID: 32079061 PMCID: PMC7070989 DOI: 10.3390/antiox9020158] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 12/11/2022] Open
Abstract
Melatonin is a pleiotropic molecule with multiple and various functions. In recent years, there has been a considerable increase in the consumption of melatonin supplements for reasons other than those related with sleep (as an antioxidant, for anti-aging, and as a hunger regulator). Although the chemical synthesis of melatonin has recently been improved, several unwanted by-products of the chemical reactions involved occur as contaminants. Phytomelatonin, melatonin of plant origin, was discovered in several plants in 1995, and the possibility of using raw plant material as a source to obtain dietary supplements rich in phytomelatonin instead of synthetic melatonin, with its corresponding chemical by-products was raised. This work characterizes the phytomelatonin-rich extract obtained from selected plant material and determines the contents in phytomelatonin, phenols, flavonoids, and carotenoids. Additionally, the antioxidant activity was measured. Finally, a melatonin-specific bioassay in fish was carried out to demonstrate the excellent biological properties of the natural phytomelatonin-rich extract obtained.
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11
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Cheng C, Liu Y, Fang W, Tao J, Yang Z, Yin Y. iTRAQ-based proteomic and physiological analyses of mustard sprouts in response to heat stress. RSC Adv 2020; 10:6052-6062. [PMID: 35497421 PMCID: PMC9049219 DOI: 10.1039/c9ra10089j] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 01/30/2020] [Indexed: 12/02/2022] Open
Abstract
Heat stress has been proved to increase the content of melatonin in plants. In the present study, a combination of methods including physiological and biochemical, gene transcription and proteomic were used to investigate the melatonin accumulation mechanisms in mustard sprouts under heat treatment during the germination period. It was revealed that the heat treatment can significantly affect sprout growth, antioxidant enzyme activity and melatonin content in mustard sprouts. Meanwhile, the expression of melatonin key synthase genes, such as tryptophan decarboxylase genes (BjTDC 1, BjTDC 2) and serotonin N-acetyltransferase genes (BjSNAT 1), were significantly induced by heat stress, which coincided with the trend of melatonin content. Under the heat stress, a total of 172 differential abundance proteins were confidently identified in mustard sprouts and participated in many physiological processes. Functional classification analysis showed that the defense/pressure, energy and nucleotide metabolism, protein biosynthesis, signal transduction and transcription etc. were largely induced. Heat treatment stimulated a defense response at the protein level by regulating the growth and physiological metabolism in mustard sprouts. The results in this work provided novel deep insights into the proteins' response to heat stress, which will certainly promote further understanding of the heat-tolerance mechanism of mustard sprouts.
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Affiliation(s)
- Chao Cheng
- College of Food Science and Engerning, Yangzhou University Yangzhou Jiangsu 210095 People's Republic of China +86-514-89786551 +86-514-89786551
| | - Yin Liu
- College of Food Science and Engerning, Yangzhou University Yangzhou Jiangsu 210095 People's Republic of China +86-514-89786551 +86-514-89786551
| | - Weiming Fang
- College of Food Science and Engerning, Yangzhou University Yangzhou Jiangsu 210095 People's Republic of China +86-514-89786551 +86-514-89786551
| | - Jun Tao
- College of Food Science and Engerning, Yangzhou University Yangzhou Jiangsu 210095 People's Republic of China +86-514-89786551 +86-514-89786551
| | - Zhengfei Yang
- College of Food Science and Engerning, Yangzhou University Yangzhou Jiangsu 210095 People's Republic of China +86-514-89786551 +86-514-89786551
| | - Yongqi Yin
- College of Food Science and Engerning, Yangzhou University Yangzhou Jiangsu 210095 People's Republic of China +86-514-89786551 +86-514-89786551
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12
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Unger N, Ferraro A, Holzgrabe U. Investigation of tryptophan-related yellowing in parenteral amino acid solution: Development of a stability-indicating method and assessment of degradation products in pharmaceutical formulations. J Pharm Biomed Anal 2019; 177:112839. [PMID: 31505430 DOI: 10.1016/j.jpba.2019.112839] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/20/2019] [Accepted: 08/26/2019] [Indexed: 11/18/2022]
Abstract
Parenteral amino acid solutions containing tryptophan tend to develop a yellow colouration upon storage. Hence, the aim of the present study was to find out whether tryptophan degradation products are the reason for the yellowing. The degree of discolouration and tryptophan degradation was examined by visual examination and UV/Vis measurements with respect to oxygen presence, pH value, and duration of steam sterilization. LC-UV analyses of autoclaved tryptophan solutions indicated eight degradation products, namely R,R/R,S 2-amino-3-(oxoindolin-3-yl)propanoic acid, R,R/R,S 2-amino-3-hydroxy-2-oxoindolin-3-yl)propanoic acids, cis/trans 3a-hydroxy-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indole-2-carboxylic acid, N´-formylkynurenine, and kynurenine. The proposed degradation products were confirmed by spiking of synthesized degradation products and LC-UV/MS analyses. The LC-UV analysis method was optimized and validated according to the ICH guideline Q2 (R1). Tryptophan stability in commercially available parenteral amino acid formulations was evaluated over a storing period of 12 months in two common types of primary packaging after autoclave procedure.
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Affiliation(s)
- Nina Unger
- Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Antonio Ferraro
- Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ulrike Holzgrabe
- Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany.
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Klarskov K, Gagnon H, Racine M, Boudreault PL, Normandin C, Marsault E, Gleich GJ, Naylor S. Peak AAA fatty acid homolog contaminants present in the dietary supplement l-Tryptophan associated with the onset of eosinophilia-myalgia syndrome. Toxicol Lett 2018; 294:193-204. [PMID: 29800716 DOI: 10.1016/j.toxlet.2018.05.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 05/08/2018] [Accepted: 05/22/2018] [Indexed: 12/17/2022]
Abstract
The eosinophilia-myalgia syndrome (EMS) outbreak that occurred in the USA and elsewhere in 1989 was caused by the ingestion of Showa Denko K.K. (SD) L-tryptophan (L-Trp). "Six compounds" detected in the L-Trp were reported as case-associated contaminants. Recently the final and most statistically significant contaminant, "Peak AAA" was structurally characterized. The "compound" was actually shown to be two structural isomers resulting from condensation reactions of L-Trp with fatty acids derived from the bacterial cell membrane. They were identified as the indole C-2 anteiso (AAA1-343) and linear (AAA2-343) aliphatic chain isomers. Based on those findings, we utilized a combination of on-line HPLC-electrospray ionization mass spectrometry (LC-MS), as well as both precursor and product ion tandem mass spectrometry (MS/MS) to facilitate identification of a homologous family of condensation products related to AAA1-343 and AAA2-343. We structurally characterized eight new AAA1-XXX/AAA2-XXX contaminants, where XXX represents the integer molecular ions of all the related homologs, differing by aliphatic chain length and isomer configuration. The contaminants were derived from the following fatty acids of the bacterial cell membrane, 5-methylheptanoic acid (anteiso-C8:0) for AAA1-315; n-octanoic acid (n-C8:0) for AAA2-315; 6-methyloctanoic acid (anteiso-C9:0) for AAA1-329; n-nonanoic acid (n-C9:0) for AAA2-329; 10-methyldodecanoic acid (anteiso-C13:0) for AAA1-385; n-tridecanoic acid (n-C13:0) for AAA2-385; 11-methyltridecanoic acid (anteiso-C14:0) for AAA1-399; and n-tetradecanoic acid (n-C14:0) for AAA2-399. The concentration levels for these contaminants were estimated to be 0.1-7.9 μg / 500 mg of an individual SD L-Trp tablet or capsule The structural similarity of these homologs to case-related contaminants of Spanish Toxic Oil Syndrome (TOS) is discussed.
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Affiliation(s)
- Klaus Klarskov
- Laboratory of Mass Spectrometry and Xenobiotics, Department of Pharmacology and Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, J1H 5N4, Canada
| | - Hugo Gagnon
- PhenoSwitch Bioscience, Sherbrooke, Quebec J1H 5N4, Canada
| | - Mathieu Racine
- PhenoSwitch Bioscience, Sherbrooke, Quebec J1H 5N4, Canada
| | - Pierre-Luc Boudreault
- Department of Pharmacology and Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, J1H 5N4, Canada
| | - Chad Normandin
- Department of Pharmacology and Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, J1H 5N4, Canada
| | - Eric Marsault
- Department of Pharmacology and Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, J1H 5N4, Canada
| | - Gerald J Gleich
- Departments of Dermatology and Medicine, School of Medicine, University of Utah, Salt Lake City, UT, 84132, USA
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Arnao MB, Hernández-Ruiz J. Phytomelatonin, natural melatonin from plants as a novel dietary supplement: Sources, activities and world market. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.06.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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15
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The Potential of Phytomelatonin as a Nutraceutical. Molecules 2018; 23:molecules23010238. [PMID: 29361780 PMCID: PMC6017233 DOI: 10.3390/molecules23010238] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 01/17/2018] [Accepted: 01/18/2018] [Indexed: 11/25/2022] Open
Abstract
Phytomelatonin (plant melatonin) is chemically related to the amino acid tryptophan and has many diverse properties. Phytomelatonin is an interesting compound due to its outstanding actions at the cellular and physiological level, especially its protective effect in plants exposed to diverse stress situations, while its vegetable origin offers many opportunities because it is a natural compound. We present an overview of its origin, its action in plants in general (particularly in plant species with high levels of phytomelatonin), and its possibilities for use as a nutraceutical with particular attention paid to the beneficial effects that it may have in human health. The differences between synthetic melatonin and phytomelatonin, according to its origin and purity, are presented. Finally, the current market for phytomelatonin and its limits and potentials are discussed.
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16
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Klarskov K, Gagnon H, Boudreault PL, Normandin C, Plancq B, Marsault E, Gleich GJ, Naylor S. Structure determination of disease associated peak AAA from l-Tryptophan implicated in the eosinophilia-myalgia syndrome. Toxicol Lett 2017; 282:71-80. [PMID: 29037509 DOI: 10.1016/j.toxlet.2017.10.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 08/19/2017] [Accepted: 10/10/2017] [Indexed: 10/18/2022]
Abstract
The eosinophilia-myalgia syndrome (EMS) outbreak of 1989 that occurred in the USA and elsewhere was caused by the ingestion of l-Tryptophan (L-Trp) solely manufactured by the Japanese company Showa Denko K.K. (SD). Six compounds present in the SD L-Trp were reported to be case-associated contaminants. However, "one" of these compounds, Peak AAA has remained structurally uncharacterized, despite the fact that it was described as "the only statistically significant (p=0.0014) contaminant". Here, we employ on-line microcapillary-high performance liquid chromatography-electrospray ionization mass spectrometry (LC-MS), and tandem mass spectrometry (MS/MS) to determine that Peak AAA is in fact two structurally related isomers. Peak AAA1 and Peak AAA2 differed in LC retention times, and were determined by accurate mass-LC-MS to both have a protonated molecular ion (MH+) of mass 343.239Da (Da), corresponding to a molecular formula of C21H30N2O2, and possessing eight degrees of unsaturation (DoU) for the non-protonated molecule. By comparing the LC-MS and LC-MS-MS retention times and spectra with authentic synthetic standards, Peak AAA1 was identified as the intermolecular condensation product of L-Trp with anteiso 7-methylnonanoic acid, to afford (S)-2-amino-3-(2-((S,E)-7-methylnon-1-en-1-yl)-1H-indol-3-yl)propanoic acid. Peak AAA2 was determined to be a condensation product of L-Trp with decanoic acid, which produced (S)-2-amino-3-(2-((E)-dec-1-en-1-yl)-1H-indol-3-yl)propanoic acid.
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Affiliation(s)
- Klaus Klarskov
- Department of Pharmacology and Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Hugo Gagnon
- PhenoSwitch Bioscience, Sherbrooke, Quebec J1H 5N4, Canada
| | - Pierre-Luc Boudreault
- Department of Pharmacology and Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Chad Normandin
- Department of Pharmacology and Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Baptiste Plancq
- Department of Pharmacology and Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Eric Marsault
- Department of Pharmacology and Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Gerald J Gleich
- Departments of Dermatology and Medicine, School of Medicine, University of Utah, Salt Lake City, UT 84132, USA
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17
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Cerezo AB, Leal Á, Álvarez-Fernández MA, Hornedo-Ortega R, Troncoso AM, García-Parrilla MC. Quality control and determination of melatonin in food supplements. J Food Compost Anal 2016. [DOI: 10.1016/j.jfca.2015.09.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Allen JA, Peterson A, Sufit R, Hinchcliff ME, Mahoney JM, Wood TA, Miller FW, Whitfield ML, Varga J. Post-epidemic eosinophilia-myalgia syndrome associated with L-tryptophan. ARTHRITIS AND RHEUMATISM 2011; 63:3633-9. [PMID: 21702023 PMCID: PMC3848710 DOI: 10.1002/art.30514] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Eosinophilia-myalgia syndrome (EMS) is characterized by subacute onset of myalgias and peripheral eosinophilia, followed by chronic neuropathy and skin induration. An epidemic of EMS in 1989 was linked to consumption of L-tryptophan that had originated from a single source. Following the ban by the Food and Drug Administration (FDA) on the sale of L-tryptophan, the incidence of EMS declined rapidly. Moreover, no new cases have been described since the FDA ban was lifted in 2005. We report the clinical, histopathologic, and immunogenetic features of a new case of L-tryptophan-associated EMS, along with evidence of activated transforming growth factor β and interleukin-4 signaling in the lesional skin.
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Affiliation(s)
- Jeffrey A Allen
- Department of Neurology, Division of Neuromuscular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Alicia Peterson
- Department of Medicine, Division of Rheumatology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Robert Sufit
- Department of Neurology, Division of Neuromuscular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Monique E Hinchcliff
- Department of Medicine, Division of Rheumatology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | | | - Tammara A Wood
- Department of Genetics, Dartmouth Medical School, Hanover, NH
| | - Frederick W Miller
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, NIH, HHS, Bethesda, MD
| | | | - John Varga
- Department of Medicine, Division of Rheumatology, Northwestern University Feinberg School of Medicine, Chicago, IL
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19
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Maitani T, Saitoh H. [Eosinophilia myalgia syndrome (EMS) caused by L-tryptophan product and toxic oil syndrome (TOS) caused by denatured rape-seed oil]. Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) 2010; 50:279-91. [PMID: 20065617 DOI: 10.3358/shokueishi.50.279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Tamio Maitani
- School of Food and Nutritional Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
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20
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Abstract
Over the past 40 y, several lines of investigation have shown that the chemistry and function of both the developing and the mature brain are influenced by diet. Examples are the effect of folate deficiency on neural tube development during early gestation, the influence of essential fatty acid deficiency during gestation and postnatal life on the development of visual function in infants, and the effects of tryptophan or tyrosine intake (alone or as a constituent of dietary protein) on the production of the brain neurotransmitters derived from them (serotonin and the catecholamines, respectively). Sometimes the functional effects are clear and the underlying biochemical mechanisms are not (as with folate and essential fatty acids); in other cases (such as the amino acids tyrosine and tryptophan), the biochemical effects are well understood, whereas the effect on brain function is not. Despite the incomplete knowledge base on the effects of such nutrients, investigators, physicians, and regulatory bodies have promoted the use of these nutrients in the treatment of disease. Typically, these nutrients have been given in doses above those believed to be required for normal health; after they have been given in pure form, unanticipated adverse effects have occasionally occurred. If this pharmacologic practice is to continue, it is important from a public safety standpoint that each nutrient be examined for potential toxicities so that appropriate purity standards can be developed and the risks weighed against the benefits when considering their use.
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Affiliation(s)
- J D Fernstrom
- University of Pittsburgh School of Medicine, Western Psychiatric Institute and Clinic, Pittsburgh, PA 15213, USA. ferstro+@pitt.edu
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21
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Naylor S, Williamson BL, Johnson KL, Gleich GJ. Structural characterization of case-associated contaminants peak C and FF in L-tryptophan implicated in eosinophilia-myalgia syndrome. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2000; 467:453-60. [PMID: 10721088 DOI: 10.1007/978-1-4615-4709-9_57] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
We have characterized the structures of two case-associated contaminants of the Showa Denko L-tryptophan known to cause eosinophilia-myalgia syndrome (EMS). A combination of on-line accurate mass HPLC-electrospray ionization-mass spectrometry (LC-MS), HPLC-tandem mass spectrometry (LC-MS-MS) and HPLC-in source collision induced dissociation-MS-MS (LC-sCID-MS-MS) allowed the structure determination of both Peak C and FF. Peak C is identified as 3a-hydroxy-1,2,3,3a,8,8a-hexahydropyrrolo-[2-3b]-indole-2-carboxyl ic acid, whereas Peak FF is characterized as 2-(2-hydroxy-indoline)-tryptophan. Both contaminants contain indoline rings, and the significance of this finding is discussed.
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Affiliation(s)
- S Naylor
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905, USA.
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Naylor S, Johnson KL, Williamson BL, Klarskov K, Gleich GJ. Structural characterization of contaminants in commercial preparations of melatonin by on-line HPLC-electrospray ionization-tandem mass spectrometry. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2000; 467:769-77. [PMID: 10721130 DOI: 10.1007/978-1-4615-4709-9_99] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Three different commercially available melatonin preparations were analyzed by on-line HPLC-electrospray ionization-tandem mass spectrometry. All three samples contained the same impurities at the approximately 0.1-0.5% level of parent melatonin. Based on accurate mass-HPLC-MS and tandem mass spectrometric analyses, two contaminants (both MH+ = 249) were identified as hydroxylation products of melatonin. One compound (MH+ = 265) was determined to be a C-2 oxidation product of hydroxymelatonin and a group of four regioisomers (MH+ = 477) were identified as melatonin-formaldehyde condensation products. These latter contaminants are structural analogues of the case-associated peak "E" found in L-tryptophan implicated in onset of eosinophilia-myalgia syndrome. The significance of these findings is discussed.
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Affiliation(s)
- S Naylor
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905, USA.
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Affiliation(s)
- S H Zeisel
- School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7400, USA.
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