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Nutrients Aug 2023We previously found that the continuous feeding of ethanol caused mice dysbiosis, in which the cecal microbiota were significantly altered, as compared with those in the...
We previously found that the continuous feeding of ethanol caused mice dysbiosis, in which the cecal microbiota were significantly altered, as compared with those in the non-feeding control group, especially in some bacterial genera involved in gut inflammation. In the present study, we have found that the fermented extract of stevia () leaves with plant-derived lactic acid bacteria (LABs), LY45, improves the trimethylamine (TMA) productivity of cecal content, which can be used as an indicator of dysbiosis. The following animal experiment also shows that the LY45-fermented stevia extract represses the typical increase in serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels, which decreased from 1106 to 210 IU/L ( < 0.05) and from 591 to 100 IU/L ( < 0.05), respectively, together with the simultaneously latent TMA productivity (from 1356 to 745 μM, < 0.05) of cecal content in the ethanol-fed mice. The microbiota analyses have shown that the observed increased alterations in pro-inflammatory genera putative (family Clostridiaceae) and are restored by the fermented stevia extract. Our result indicates that the preliminary bioconversion of herbal medicinal precursors by fermentation with safe microorganisms like LABs is expected to be a hopeful method of producing specific metabolites that may contribute to the reconstruction of gut microbiota.
Topics: Animals; Mice; Gastrointestinal Microbiome; Stevia; Dysbiosis; Ethanol; Clostridiaceae; Lactobacillales; Plant Extracts
PubMed: 37686739
DOI: 10.3390/nu15173708 -
Toxicology Letters Sep 2023Gelsedine-type alkaloids are highly toxic plant secondary metabolites produced by shrubs belonging to the Gelsemium genus. Gelsenicine is one of the most concerning...
Gelsedine-type alkaloids are highly toxic plant secondary metabolites produced by shrubs belonging to the Gelsemium genus. Gelsenicine is one of the most concerning gelsedine-type alkaloids with a lethal dose lower than 1 mg/Kg in mice. Several reported episodes of poisoning in livestock and fatality cases in humans due to the usage of Gelsemium plants extracts were reported. Also, gelsedine-type alkaloids were found in honey constituting a potential food safety issue. However, their toxicological understanding is scarce and the molecular mechanism underpinning their toxicity needs further investigations. In this context, an in silico approach based on reverse screening, docking and molecular dynamics successfully identified a possible gelsenicine biological target shedding light on its toxicodynamics. In line with the available crystallographic data, it emerged gelsenicine could target the acetylcholine binding protein possibly acting as a partial agonist against α7 nicotinic acetylcholine receptor (AChR). Overall, these results agreed with evidence previously reported and prioritized AChR for further dedicated analysis.
PubMed: 37683806
DOI: 10.1016/j.toxlet.2023.09.003 -
International Journal of Molecular... Aug 2023Manganese (Mn) is among one of the essential trace elements for normal plant development; however, excessive Mn can cause plant growth and development to be hindered....
Manganese (Mn) is among one of the essential trace elements for normal plant development; however, excessive Mn can cause plant growth and development to be hindered. Nevertheless, the regulatory mechanisms of plant root response to Mn poisoning remain unclear. In the present study, results revealed that the root growth was inhibited when exposed to Mn poisoning. Physiological results showed that the antioxidase enzyme activities (peroxidase, superoxide dismutase, ascorbate peroxidase, and catalase) and the proline, malondialdehyde, and soluble sugar contents increased significantly under Mn toxicity stress (100 μM Mn), whereas the soluble protein and four hormones' (indolebutyric acid, abscisic acid, indoleacetic acid, and gibberellic acid 3) contents decreased significantly. In addition, the Mn, Fe, Na, Al, and Se contents in the roots increased significantly, whereas those of Mg, Zn, and K decreased significantly. Furthermore, RNA sequencing (RNA-seq) analysis was used to test the differentially expressed genes (DEGs) of soybean root under Mn poisoning. The results found 45,274 genes in soybean root and 1430 DEGs under Mn concentrations of 5 (normal) and 100 (toxicity) μM. Among these DEGs, 572 were upregulated and 858 were downregulated, indicating that soybean roots may initiate complex molecular regulatory mechanisms on Mn poisoning stress. The results of quantitative RT-PCR indicated that many DEGs were upregulated or downregulated markedly in the roots, suggesting that the regulation of DEGs may be complex. Therefore, the regulatory mechanism of soybean root on Mn toxicity stress is complicated. Present results lay the foundation for further study on the molecular regulation mechanism of function genes involved in regulating Mn tolerance traits in soybean roots.
Topics: Transcriptome; Glycine max; Plant Roots; Manganese; Biomass; Homeostasis; Plant Growth Regulators; Sequence Analysis, RNA
PubMed: 37628908
DOI: 10.3390/ijms241612727 -
Toxins Jul 2023Deoxynivalenol (DON, Vomitoxin) is a threatening mycotoxin that mainly produces oxidative stress and leads to hepatotoxicity in poultry. Antioxidant dietary supplements...
Deoxynivalenol (DON, Vomitoxin) is a threatening mycotoxin that mainly produces oxidative stress and leads to hepatotoxicity in poultry. Antioxidant dietary supplements dramatically boost immunity, safeguarding animals from DON poisoning. Luteolin (LUT) is an active plant-derived compound that poses influential antioxidants. This study explored the effectiveness of LUT in combination with activated charcoal (AC) in detoxifying DON in broilers. The 180 one-day broiler chickens were allocated into five different groups having six replicates in each group, provided with ad libitum feed during the trial period (28 days) as follows: in the control group, basal diet (feed with no supplementation of LUT, AC or DON); in group 2, a basal diet added with 10 mg/kg DON from contaminated culture (DON); in group 3, a basal diet augmented by 350 mg/kg LUT and DON 10 mg/kg (DON + LUT); in group 4, a basal diet supplemented by DON 10 mg/kg + AC 200 mg/kg (DON + AC); and in group 5, a basal diet supplemented by 10 mg/kg DON + 350 mg/kg LUT + 200 mg/kg AC (DON + LUT + AC). Concerning the control group, the DON-treated broilers demonstrated a significant decrease in growth performance ( < 0.05) and serum immunoglobulin ( < 0.05) contents, negatively changing the serum biochemical contents and enzymatic activities and an increase in histopathological liver lesions. Furthermore, DON substantially increased ( < 0.05) malondialdehyde (MDA) concentration and decreased total superoxide dismutase (T-SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) levels in the serum and liver. The intake of AC and LUT to the DON-contaminated diet decreased DON residue in the liver and potentially reduced the adverse effects of DON. Considering the results, supplementation of LUT with mycotoxin adsorbent has protective effects against mycotoxicosis caused by DON. It could be helpful for the development of novel treatments to combat liver diseases in poultry birds. Our findings may provide important information for applying LUT and AC in poultry production.
Topics: Animals; Antioxidants; Chickens; Charcoal; Luteolin
PubMed: 37624235
DOI: 10.3390/toxins15080478 -
Journal of Fungi (Basel, Switzerland) Aug 2023species are among the filamentous fungi with the most pronounced impact on agricultural production and human health. The mycotoxins produced by pathogenic not only...
species are among the filamentous fungi with the most pronounced impact on agricultural production and human health. The mycotoxins produced by pathogenic not only attack various plants including crops, causing various plant diseases that lead to reduced yields and even death, but also penetrate into the food chain of humans and animals to cause food poisoning and consequent health hazards. Although sporadic studies have revealed some of the biosynthetic pathways of toxins, they are insufficient to satisfy the need for a comprehensive understanding of toxin production. In this study, we focused on 35 serious pathogenic species with available genomes and systematically analyzed the ubiquity of the distribution of identified - and non--derived fungal toxin biosynthesis gene clusters (BGCs) in these species through the mining of core genes and the comparative analysis of corresponding BGCs. Additionally, novel sesterterpene synthases and PKS_NRPS clusters were discovered and analyzed. This work is the first to systematically analyze the distribution of related mycotoxin biosynthesis in pathogenic species. These findings enhance the knowledge of mycotoxin production and provide a theoretical grounding for the prevention of fungal toxin production using biotechnological approaches.
PubMed: 37623621
DOI: 10.3390/jof9080850 -
Ecotoxicology and Environmental Safety Sep 2023Microorganisms have recently gained recognition as efficient biological tool for reducing heavy metal toxicity in crops. In this experiment, we isolated a potent heavy...
Hormones and the antioxidant transduction pathway and gene expression, mediated by Serratia marcescens DB1, lessen the lethality of heavy metals (As, Ni, and Cr) in Oryza sativa L.
Microorganisms have recently gained recognition as efficient biological tool for reducing heavy metal toxicity in crops. In this experiment, we isolated a potent heavy metal (As, Ni, and Cr) resistant rhizobacterium Serratia marcescens DB1 and detected its plant growth promoting traits such as phosphate solubilization, gibberellin synthesis, organic acid production and amino acid regulation. Based on these findings, DB1 was further investigated for application in a rice var. Hwayeongbyeo subjected to 1 mM As, 4 mM Ni, and 4 mM Cr stress. The rice plants treated with Cr and Ni appeared healthy but were lethal, indicating unfitness for consumption due to toxic metal deposition, whereas the plants treated with > 1 mM As instantaneously died. Our results showed that DB1 inoculation significantly decreased metal accumulation in the rice shoots. Particularly, Cr uptake dropped by 16.55% and 22.12% in (Cr + DB1) and (Cr + As + Ni + DB1), respectively, As dropped by 48.90% and 35.82% in (As + DB1) and (Cr + As + Ni + DB1), respectively, and Ni dropped by 7.95% and 19.56% in (Ni + DB1) and (Cr + As + Ni + DB1), respectively. These findings were further validated by gene expression analysis results, which showed that DB1 inoculation significantly decreased the expression of OsPCS1 (a phytochelatin synthase gene), OsMTP1 (a metal transporting gene), and OsMTP5 (a gene for the expulsion of excess metal). Moreover, DB1 inoculation considerably enhanced the morphological growth of rice through modulation of endogenous phytohormones (abscisic acid, salicylic acid, and jasmonic acid) and uptake of essential elements such as K and P. These findings indicate that DB1 is an effective biofertilizer that can mitigate heavy metal toxicity in rice crops.
Topics: Oryza; Antioxidants; Serratia marcescens; Metals, Heavy; Heavy Metal Poisoning; Crops, Agricultural; Hormones; Gene Expression
PubMed: 37597286
DOI: 10.1016/j.ecoenv.2023.115377 -
European Journal of Case Reports in... 2023Nerium oleander is a plant containing cardiac glycosides, and intoxication with its leaves is a medical emergency. We report the case of a 73-year-old man who took a...
UNLABELLED
Nerium oleander is a plant containing cardiac glycosides, and intoxication with its leaves is a medical emergency. We report the case of a 73-year-old man who took a decoction of oleander leaves for a reckless purpose. Upon arrival in the emergency room, he presented an altered state of consciousness, drooling and vomiting. He was bradycardic with intermittent third-degree atrioventricular block and typical downsloping ST-segment depression related to glycosides toxicity. Despite initial treatment with atropine, isoprenaline and repeated bolus of digoxin-specific antibody (Fab) fragments, symptoms were persistent 12 hours after admission. Suspecting that the patient not only drank the decoction but also ingested the leaves and had slow gastric emptying, we performed gastric lavage without benefit. We subsequently performed a gastroscopy that showed an oleander phytobezoar, and its removal permitted a rapid clinical improvement. Treatment with digoxin-specific antibodies for intoxication is well described and dosage should be adapted to the plasmatic level. Such an examination is useless in oleander intoxication because it does not represent the real quantity of toxin. The dosage of antibodies is empiric and should be guided by the clinical severity. In such intoxication, the presence of a phytobezoar from oleander leaves cannot be excluded so we believe that a gastroscopy for its mechanical removal should always be considered to avoid persistent release of toxin.
LEARNING POINTS
Ingestion of any part of the oleander plant can result in a severe cardioactive glycoside intoxication with potentially fatal arrhythmia and should be considered a medical emergency.Treatment consists of supportive care, correction of arrhythmias and electrolyte imbalance, and digoxin-specific antibody (Fab) fragments administration.Gastroscopy for mechanical removal of a phytobezoar responsible of persistent toxin release should be always considered.
PubMed: 37554479
DOI: 10.12890/2023_003978 -
Microbial Biotechnology Dec 2023The United Nations heralds a world population exponential increase exceeding 9.7 billion by 2050. This poses the challenge of covering the nutritional needs of an... (Review)
Review
The United Nations heralds a world population exponential increase exceeding 9.7 billion by 2050. This poses the challenge of covering the nutritional needs of an overpopulated world by the hand of preserving the environment. Extensive agriculture practices harnessed the employment of fertilizers and pesticides to boost crop productivity and prevent economic and harvest yield losses attributed to plagues and diseases. Unfortunately, the concomitant hazardous effects stemmed from such agriculture techniques are cumbersome, that is, biodiversity loss, soils and waters contaminations, and human and animal poisoning. Hence, the so-called 'green agriculture' research revolves around designing novel biopesticides and plant growth-promoting bio-agents to the end of curbing the detrimental effects. In this field, microbe-plant interactions studies offer multiple possibilities for reshaping the plant holobiont physiology to its benefit. Along these lines, bacterial extracellular membrane vesicles emerge as an appealing molecular tool to capitalize on. These nanoparticles convey a manifold of molecules that mediate intricate bacteria-plant interactions including plant immunomodulation. Herein, we bring into the spotlight bacterial extracellular membrane vesicle engineering to encase immunomodulatory effectors into their cargo for their application as biocontrol agents. The overarching goal is achieving plant priming by deploying its innate immune responses thereby preventing upcoming infections.
Topics: Humans; Plant Development; Plants; Agriculture; Soil; Crop Production; Antigens, Bacterial
PubMed: 37530752
DOI: 10.1111/1751-7915.14323 -
Journal of Cardiology Cases Aug 2023We present the case series of two women aged 35 and 60 years who presented to our emergency department with severe vomiting, nausea, and malaise. Their symptoms...
UNLABELLED
We present the case series of two women aged 35 and 60 years who presented to our emergency department with severe vomiting, nausea, and malaise. Their symptoms started approximately 2 h after the ingestion of home-made mixed vegetables with freshly picked vegetables and leaves from the patients' garden, of which one was supposed to be borage. An electrocardiogram revealed diffuse ST-segment depression with down-up sloping in both patients. We supposed an accidental confusion of wild borage () with foxglove (). Both patients were subsequently admitted to the intermediate-care-unit for close monitoring and continuous activated charcoal administration. Digitoxin serum concentrations were elevated in both patients (40.9 and >50 ng/ml, respectively - reference therapeutic range 8-18 ng/ml). The younger woman, despite the relatively lower serum digitoxin concentrations, presented a single episode of advanced atrioventricular block and long-lasting sinus bradycardia. Both showed a complete recovery. Although not uncommon, our case series reiterates the fact that such plant misclassifications are potentially life-threating and warrant the treating physicians' full attention.
LEARNING OBJECTIVE
Plant poisoning is a frequent reason for consultation of poison information centers and may result in life-threatening cardiac arrhythmias. Confusion of foxglove leaves () with borage leaves (), which is a popular food ingredient for mixed salads, is not uncommon. Without a dedicated medical history, such cases are difficult to diagnose and warrant the treating physicians' full attention and the involvement of a local poison information center.
PubMed: 37521578
DOI: 10.1016/j.jccase.2023.04.007 -
Toxins Jul 2023On 6 July 2018, the Center for Epidemiology and Public Health of the French Armed Forces was informed of an outbreak of acute gastroenteritis among customers of a dining...
On 6 July 2018, the Center for Epidemiology and Public Health of the French Armed Forces was informed of an outbreak of acute gastroenteritis among customers of a dining facility at a military base in Brittany, France. A total of 200 patients were reported out of a population of 1700 (attack rate: 12%). The symptoms were mainly lower digestive tract disorders and occurred rapidly after lunch on 5 July (median incubation period: 3.3 h), suggesting a toxin-like pathogenic process. A case-control survey was carried out (92 cases and 113 controls). Statistical analysis pointed to the chili con carne served at lunch on 5 July as the very likely source of poisoning. Phytohaemagglutinin, a plant lectin, was found in the chili con carne at a concentration above the potentially toxic dose (400 HAU/gram). The raw kidney beans incorporated in the chili con carne presented a high haemagglutination activity (66,667 HAU/gram). They were undercooked, and the phytohaemagglutinin was not completely destroyed. FBDOs due to PHA are poorly documented. This study highlights the need to develop methods for routine testing of plant toxins in food matrices. Improved diagnostic capabilities would likely lead to better documentation, epidemiology, and prevention of food-borne illnesses caused by plant toxins.
Topics: Humans; Foodborne Diseases; Gastroenteritis; Toxins, Biological; Disease Outbreaks; Meat; France
PubMed: 37505726
DOI: 10.3390/toxins15070457