Inhibitory effects of lactic acid bacteria isolated from traditional fermented foods against aflatoxigenic Aspergillus spp.

AbstractIn the present study, after molecular identification of dominant lactic acid bacteria (LAB) isolated from traditional fermented foods, antifungal activity of the isolates was investigated against aflatoxigenicAspergillus spp. Based on screening results, among the isolated LAB,Pediococus lolii had the highest inhibitory effect againstAspergillus flavus (70.32%) andAspergillus niger (98.8%). Furthermore, antifungal activity ofP. lolii stationary phase cell-free supernatant (CFS) was significantly (P 
Source: Comparative Clinical Pathology - Category: Pathology Source Type: research

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In this study, we obtained the highly active and thermostable leucine aminopeptidases screened from the thermophilic fungi Thermomyces lanuginosus, Talaromyces thermophilus, and Malbranchea cinnamomea. The activity of the recombinant leucine aminopeptidase Thelap was significantly increased to 2771.5 U/mL, as mediated by the CRISPR/Cas9 tool. The recombinant Thelap was easily purified from fermentation broth by Ni-affinity chromatography, and the specific activity of the purified Thelap was increased to 7449.6 U/mg. The recombinant Thelap showed optimal activity at pH 8.5 and 75 °C and remained above 70% of the maxim...
Source: Protein Expression and Purification - Category: Biochemistry Source Type: research
Aflatoxin contamination in foods is a global concern as they are carcinogenic, teratogenic and mutagenic compounds. The aflatoxin-producing fungi, mainly from the Aspergillus section Flavi, are ubiquitous in nature and readily contaminate various food commodities, thereby affecting human’s health. The incidence of aflatoxigenic Aspergillus spp. and aflatoxins in various types of food, especially raw peanuts and peanut-based products along the supply chain has been a concern particularly in countries having tropical and sub-tropical climate, including Malaysia. These climatic conditions naturally support the growth of...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Publication date: Available online 20 November 2019Source: Food Research InternationalAuthor(s): Tiago de Melo Nazareth, Manuel Alonso-Garrido, Oana Stanciu, Jordi Mañes, Lara Manyes, Giuseppe MecaAbstractThe goals of this study were to determine the efficacy of allyl isothiocyanate (AITC) against the growth of A. flavus and Aflatoxin B1 (AFB1) production as well as to evaluate changes in the transcriptome profile when colonizing maize. A. flavus was inoculated in potato dextrose agar (PDA), the plates were placed inside glass jars and the mycelial growth (MG) was monitored for 7 d. Likewise, maize grains were conta...
Source: Food Research International - Category: Food Science Source Type: research
This study, therefore, investigated the potential of two depsidones (Unguinol and Aspergillusidone D) to induce apoptosis, cell cycle arrest and cytotoxicity, and reduce cell proliferation in the triple-negative MDA-MB-231 breast cancer cell line. Results were compared with the effects of the cytostatic drug doxorubicin, antimitotic agent colchicine and endogenous hormones 17β-estradiol, testosterone and dihydrotestosterone.The cytostatic drugs and hormones affected the MDA-MB-231 cell line comparable to other studies, showing the usefulness of this model to study the effects of depsidones on a triple-negative breast ...
Source: Toxicology Reports - Category: Toxicology Source Type: research
Org. Biomol. Chem., 2019, Advance Article DOI: 10.1039/C9OB02296A, CommunicationKangping Xu, Can Yang, Yuanyuan Xu, Dan Li, Shumin Bao, Zhenxing Zou, Fenghua Kang, Guishan Tan, Shu-Ming Li, Xia Yu Regio-selective geranylation of natural biflavonoids usingAspergillus terreus aromatic prenyltransferase (AtaPT) as an efficient catalyst. To cite this article before page numbers are assigned, use the DOI form of citation above. The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Organic and Biomolecular Chemistry - Category: Molecular Biology Authors: Source Type: research
The cell wall is an essential component in fungal homeostasis. The lack of a covering wall in human cells makes this component an attractive target for antifungal development. The host environment and antifungal stress can lead to cell wall modifications related to drug resistance. Antifungals targeting the cell wall including the new β-D-glucan synthase inhibitor ibrexafungerp and glycosyl-phosphatidyl Inositol (GPI) anchor pathway inhibitor fosmanogepix are promising weapons against antifungal resistance. The fosmanogepix shows strong in vitro activity against the multidrug-resistant species Candida auris, Fusarium ...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
The presence of ear rots in maize caused by Aspergillus flavus that are also associated with the production of aflatoxins has evolved into an increasing problem over the last few years. Since no commercial biological control products are still available to control A. flavus in maize in Europe, this study targets to the evaluation of six biopesticides/biostimulants (Botector®, Mycostop®, Serenade Max®, Trianum®, Vacciplant®, and zeolite) for the control of A. flavus and the derived aflatoxins in in vitro and maize field bioassays. Mycostop®, Serenade Max®, Vacciplant®, and zeolite reduced sig...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Canadian Journal of Chemistry, e-First Articles. Nanoparticles, 10 –14 nm, consisting of either Fe3O4 or Co0.2Fe2.8O4 stabilized with oleic acid, were prepared using solution combustion. Their structural and magnetic properties were examined using X-ray diffractometry, scanning electron microscopy, vibrating sample magnetometry, and Fourier-transform infrared spe ctroscopy. The properties of both sets of materials are similar, except that the cobalt-doped particles are considerably less magnetic. The in vitro inhibitory activities of the nanoparticles were assessed against pathogenic bacteria Shigella dysenteriae, Kl...
Source: Canadian Journal of Chemistry - Category: Chemistry Authors: Source Type: research
Publication date: February 2020Source: Steroids, Volume 154Author(s): Ambreen Aziz, Saira Bano, Atia-tul-Wahab, M. Iqbal ChoudharyAbstractEthisterone (17α-ethynyl-17β-hydroxyandrost-4-en-3-one) (1) is a synthetic steroidal estrogen. It is extensively used as an oral contraceptive. The current study involves the structural transformation of ethisterone (1) by Aspergillus niger, and Cunninghamella blakesleeana. Fermentation of 1 with C. blakesleeana afforded two new polar metabolites, 17α-ethynyl-6β,15β,17β-trihydroxyandrost-4-en-3-one, and 17α-ethynyl-7β,15β,17β-trihydrox...
Source: Steroids - Category: Drugs & Pharmacology Source Type: research
Conclusions: Overall results of surgery in this cohort were good and number of complications was low. Therapy with antifungals was diverse. Surgical treatment of aspergilloma can be life-saving for patients suffering of haemoptysis, and patients with restricted disease and well-preserved pulmonary capacity may benefit from surgery. Careful patient selection is crucial. PMID: 31737315 [PubMed]
Source: Journal of Thoracic Disease - Category: Respiratory Medicine Tags: J Thorac Dis Source Type: research
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