Antibacterial and photocatalytic potential of bioactive compounds extracted from freshwater microalgae species (Spirogyra and Ocillatoria): A comparative analysis

Guleria, Samriti; Chawla, Prince; Relhan, Ankush; Kumar, Ashwani; Bhasin, Aparajita; Zhou, John L.

doi:10.1016/j.scitotenv.2023.169224

Cited by 3 publications

(1 citation statement)

References 51 publications

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“…Compostos fitoquímicos, resultantes do metabolismo primário e secundário, já foram isolados a partir de microalgas, como carotenóides, flavonóides, terpenóides, glicosídeos, esteróis, PUFAs e fenólicos (Barkia et al, 2019;Sathasivam et al, Research, Society and Development, v. 13, n. 3, e5913345297, 2024(CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v13i3.45297 3 2019. Estas substâncias já foram associadas à diversas atividades biológicas, tais como antiviral (Turkmen & Akyurt, 2021), antiprotozoária (Gharbi et al, 2021), antibacteriana (Guleria et al, 2024) e antifúngica (Lage et al, 2023).…”

Section: Introductionunclassified

Potencial antifúngico de extratos da microalga Pyramimonas virginica frente a fungos dermatófitos

Santos,

Lage,

Andrade

et al. 2024

RSD

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O objetivo deste estudo foi avaliar o potencial antifúngico in vitro dos extratos etanólicos, centrifugado e eletrofloculado, da microalga Pyramimonas virginica frente a fungos dermatófitos. Para obtenção da biomassa microalgal, o cultivo foi realizado em fotobiorreator tubular de 10 L, em triplicatas. A coleta da biomassa microalgal foi realizada por dois métodos, centrifugação e eletrofloculação. Para extração da biomassa microalgal, foi utilizado o solvente etanol absoluto (99.9%). A atividade antifúngica dos extratos foi avaliada pelo método de microdiluição em caldo, no intervalo de concentração de 0.0115 a 6 mg mL-1. A Concentração Inibitória Mínima (CIM) foi determinada visualmente, pela ausência de crescimento do fungo. Os extratos foram testados contra os dermatófitos Nannizzia gypsea, Trichophyton mentagrophytes e Trichophyton tonsurans. Ambos os extratos microalgais, centrifugado e eletrofloculado, conseguiram inibir o crescimento de todos os dermatófitos avaliados, sendo o extrato centrifugado mais ativo do que o extrato eletrofloculado. Os extratos apresentaram menor valor de CIM contra T. tonsurans (CIM: 0.75 mg mL-1) e N. gypsea (CIM: 0.75 mg mL-1), seguido por T. mentagrophytes (CIM: 6 mg mL-1). Quanto ao tipo de atividade registrada, frente ao fungo T. mentagrophytes a atividade foi do tipo fungiostática e para os fungos T. tonsurans e N. gypsea foi do tipo fungicida. Este foi um estudo pioneiro acerca da atividade antifúngica da microalga P. virginica, assim como do método de fracionamento da sua biomassa. A microalga apresentou grande potencial antifúngico contra os fungos dermatófitos avaliados, mostrando-se promissora no desenvolvimento de novos fitoterápicos e tratamentos para as dermatofitoses.

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Section: Introductionunclassified

Potencial antifúngico de extratos da microalga Pyramimonas virginica frente a fungos dermatófitos

Santos,

Lage,

Andrade

et al. 2024

RSD

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Fluorescence capturing behaviour of cyanobacterial resilience: Insights into UV‐exposed ecosystems and its environmental applications

R.,

M Basalingappa,

et al. 2024

Luminescence

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Cyanobacteria are resilient microorganisms and thrive in environments exposed to UV radiation, ranging from ocean surfaces to scorching hot springs and dry expanses. ‘Cyanobacterial Resilience’ refers to their ability to withstand UV radiation, revealing intricate genomic secrets and adaptive mechanisms ensuring survival. These mechanisms include metabolic adaptations, robust DNA repair systems and UV‐protective compounds such as Scytonemin and Mycosporine, vital for shielding against UV radiation survival. Cyanobacteria are crucial pioneers in UV‐exposed ecosystems, highlighting their resilience and adaptability. Some cyanobacteria exhibit luminescence, emitting blue‐green light due to phycobiliproteins, while bioluminescence in cyanobacteria, if it occurs, involves different compounds rather than luciferins and luciferase enzymes. This luminescence holds promise for various biotechnological applications, such as biosensors, imaging probes and carbon sequestration, for participating in photocatalytic processes for water purification and CO2 conversion, and contributes to solar simulation studies to advance photosynthesis and renewable energy technologies. The versatile applications of these materials highlight their ecological importance and potential in addressing global challenges. In conclusion, ‘Cyanobacterial Resilience’ highlights the remarkable adaptation strategies of cyanobacteria in UV‐exposed environments. It emphasises their role as pioneers and innovators in biological and technological domains, providing insights into their enduring impact on ecosystems and scientific advancement.

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Algae as Crop Plants Being a Source of Bioactive Ingredients of Pharmaceutical and Dietary Importance

Jabłońska-Trypuć

2024

Agronomy

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Algae are currently used in many areas, including dietetics, pharmacy, cosmetology and to increase the nutritional value of food and animal feed due to their chemical composition. They are a source of extremely valuable molecules, including polyunsaturated fatty acids and pigments. Algae are also a valuable source of protein and almost all essential vitamins. They are rich in pigments such as chlorophyll, carotenoids and phycobiliproteins. These substances have a wide range of commercial applications. Due to its very intensive use, the demand for this plant raw material is constantly growing. Therefore, the methods of growing and harvesting algae are constantly improved in order to maximize the cultivation effect while minimizing costs and energy inputs. Future research should focus on improving algae cultivation and harvesting systems, with an emphasis on the possibility of genetic modifications that would allow even more efficient algae cultivation. This review summarizes methods of micro- and macroalgae cultivation, the chemical composition of selected algae species, which are important from the pharmaceutical, dietary and cosmetic points of view and therapeutic and dietary applications of compounds derived from different algae species. The key conclusion drawn from this article is that algae are an extremely valuable raw material, rich in numerous macro- and micronutrients necessary for humans, the acquisition of which is part of the currently important strategy of ecological policy for obtaining raw materials for various industries.

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Antibacterial and photocatalytic potential of bioactive compounds extracted from freshwater microalgae species (Spirogyra and Ocillatoria): A comparative analysis

Cited by 3 publications

References 51 publications

Potencial antifúngico de extratos da microalga Pyramimonas virginica frente a fungos dermatófitos

Potencial antifúngico de extratos da microalga Pyramimonas virginica frente a fungos dermatófitos

Fluorescence capturing behaviour of cyanobacterial resilience: Insights into UV‐exposed ecosystems and its environmental applications

Algae as Crop Plants Being a Source of Bioactive Ingredients of Pharmaceutical and Dietary Importance

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