Ultraviolet radiation and generally recognized as safe (GRAS) preservatives for inactivation of Aspergillus niger in vitro and corn dough

Torres, Anny Bejarano; Bedoya, Kihomara Valencia; Guerra, Juan David; Montoya-Estrada, Claudia Nohemy; Castro-Ríos, Katherin

doi:10.1590/1981-6723.13321

Cited by 1 publication

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References 14 publications

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“…Moreover, Aspergillus niger is one of the most well-known fungi, and has been isolated from several niches (soil, nuts and food). Extracellular enzymes and citric acid produced from A. niger are known as Generally Recognized As Safe for human consumption (GRAS) by the FDA because of their usage in several industrial settings [ 8 ]. Hence, A. niger has been considered a valuable resource for the biotechnological sector due to the abundance of secondary metabolites with immunomodulatory and cytotoxic properties against cancer cells [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Fungal Secondary Metabolites/Dicationic Pyridinium Iodide Combinations in Combat against Multi-Drug Resistant Microorganisms

et al. 2023

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The spread of antibiotic-resistant opportunistic microbes is a huge socioeconomic burden and a growing concern for global public health. In the current study, two endophytic fungal strains were isolated from Mangifera Indica roots and identified as Aspergillus niger MT597434.1 and Trichoderma lixii KU324798.1. Secondary metabolites produced by A. niger and T. lixii were extracted and tested for their antimicrobial activity. The highest activity was noticed against Staphylococcus aureus and E. coli treated with A. niger and T. lixii secondary metabolites, respectively. A. niger crude extract was mainly composed of Pentadecanoic acid, 14-methyl-, methyl ester and 9-Octadecenoic acid (Z)-, methyl ester (26.66 and 18.01%, respectively), while T. lixii crude extract’s major components were 2,4-Decadienal, (E,E) and 9-Octadecenoic acid (Z)-, and methyl ester (10.69 and 10.32%, respectively). Moreover, a comparative study between the fungal extracts and dicationic pyridinium iodide showed that the combination of A. niger and T. lixii secondary metabolites with dicationic pyridinium iodide compound showed a synergistic effect against Klebsiella pneumoniae. The combined formulae inhibited the bacterial growth after 4 to 6 h through cell wall breakage and cells deformation, with intracellular components leakage and increased ROS production.

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Section: Introductionmentioning

confidence: 99%

Fungal Secondary Metabolites/Dicationic Pyridinium Iodide Combinations in Combat against Multi-Drug Resistant Microorganisms

et al. 2023

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show abstract

Ultraviolet radiation and generally recognized as safe (GRAS) preservatives for inactivation of Aspergillus niger in vitro and corn dough

Abstract: Ultraviolet radiation and generally recognized as safe (GRAS) preservatives for inactivation of Aspergillus niger in vitro and corn dough.

Cited by 1 publication

References 14 publications

Fungal Secondary Metabolites/Dicationic Pyridinium Iodide Combinations in Combat against Multi-Drug Resistant Microorganisms

Fungal Secondary Metabolites/Dicationic Pyridinium Iodide Combinations in Combat against Multi-Drug Resistant Microorganisms

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