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Title

Antioxidant and Anticancer Activities of Lactobacillus Hilgardii Strain AG12a

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Abstract

 Background: It has been proven that probiotic Lactobacillus bacteria have inhibitory effects on human cancer cell lines. The aim of this study is to isolate and characterize the antioxidant probiotic Lactobacillus and determine the possible anticancer activities of the selected strain. Methods: One of the Lactobacillus strain isolated from camel doogh sample showed the high antioxidant activity by using of different methods such as resistance to hydrogen peroxide, hydroxyl radical and superoxide anions. The antioxidant strain was characterized by sequencing of 16S rRNA V2-V3 regions and the 16S-23S intergenic spacer (ITS). The methanol extract of this strain supernatant was fractionated using thin layer chromatography (TLC) and antioxidant activity of fractions was detected by 0. 1% of DPPH through TLC-DPPH bioautography. In vitro anticancer activity of each fraction was investigated by using MTT and flow cytometry methods. Results: According to the phylogenetic results, the antioxidant Lactobacillus strain was closely related to Lactobacillus hilgardii strain E91 (Accession No. EF536365). After fractionation and anti-proliferation assessments of Lactobacillus hilgardii strain AG12a extracellular materials, one of the antioxidant fraction (F4) showed maximum DPPH radical scavenging activity (IC50 of 535. 27 μ g/mL). MTT assay of the F4 fraction demonstrated cytotoxic activity against Caco-2 with the IC50 value of 299. 05 μ g/mL. The cell death activity of the fraction was confirmed by flow cytometry with 30. 925. Conclusions: In this study, the anticancer and apoptotic properties of Lactobacillus hilgardii against Caco-2 cell line was reported for the first time. The isolated bioactive fraction from the extracellular methanol extract needs to be further investigated in human studies of cancer therapy.

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    APA: Copy

    Pourramezan, Zahra, OLOOMI, MANA, & KASRA KERMANSHAHI, ROUHA. (2020). Antioxidant and Anticancer Activities of Lactobacillus Hilgardii Strain AG12a. INTERNATIONAL JOURNAL OF PREVENTIVE MEDICINE, 11(-), 0-0. SID. https://sid.ir/paper/682949/en

    Vancouver: Copy

    Pourramezan Zahra, OLOOMI MANA, KASRA KERMANSHAHI ROUHA. Antioxidant and Anticancer Activities of Lactobacillus Hilgardii Strain AG12a. INTERNATIONAL JOURNAL OF PREVENTIVE MEDICINE[Internet]. 2020;11(-):0-0. Available from: https://sid.ir/paper/682949/en

    IEEE: Copy

    Zahra Pourramezan, MANA OLOOMI, and ROUHA KASRA KERMANSHAHI, “Antioxidant and Anticancer Activities of Lactobacillus Hilgardii Strain AG12a,” INTERNATIONAL JOURNAL OF PREVENTIVE MEDICINE, vol. 11, no. -, pp. 0–0, 2020, [Online]. Available: https://sid.ir/paper/682949/en

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