Structural, antioxidant and antibacterial activities of polysaccharides extracted from olive leaves

Khemakhem, Ibtihel; Abdelhedi, Ola; Trigui, Ines; Ayadi, Mohamed Ali; Bouaziz, Mohamed

doi:10.1016/j.ijbiomac.2017.08.037

Cited by 112 publications

(46 citation statements)

References 41 publications

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“…Antimicrobial activities have also been described for polysaccharides isolated from Quercus brantii leaves [46], Olea europaea leaves [47], Capparis spinosa leaves [48], and Malva aegyptiaca leaves [42]. The mechanisms involved in the antimicrobial activity of polysaccharides are worthy of further investigations.…”

Section: Antimicrobial Activities Of the Yerba Mate Polysaccharidementioning

confidence: 97%

Antioxidant and antimicrobial activities of a purified polysaccharide from yerba mate (Ilex paraguariensis)

Kungel

Corrêa

et al. 2018

International Journal of Biological Macromolecules

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This study investigated the antioxidant, antimicrobial and cytotoxic properties of a purified yerba mate polysaccharide. The yerba mate polysaccharide showed a prominent antioxidant activity as evaluated by 2,2-diphenyl-1picrylhydrazyl (DPPH•)-radical scavenging activity (IC 50 = 1.25 ± 0.10 mg/mL), 3-ethyl benzothiazoline-6sulphonic acid (ABTS•+)-radical scavenging activity (IC 50 = 0.41 ± 0.05 mg/mL), and hydroxyl scavenging activity (IC 50 = 3.36 ± 0.31 mg/mL). The antioxidant activity evaluated as the ferric ion reduction power (FRAP) and oxygen radical absorbance radical assay (ORAC), expressed as trolox equivalents, were 20.84 ± 1.61 μM TE/mg and 556.30 ± 12.83 μM TE/mg, respectively. The purified yerba mate polysaccharide presented high antimicrobial activity against several bacterial and fungal strains; however, no cytotoxicity against all four tumor human cell lines assessed.

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Section: Antimicrobial Activities Of the Yerba Mate Polysaccharidementioning

confidence: 97%

Antioxidant and antimicrobial activities of a purified polysaccharide from yerba mate (Ilex paraguariensis)

Kungel

Corrêa

et al. 2018

International Journal of Biological Macromolecules

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“…pneumonia for both TWSP and PWSP. This study indicated that the antibacterial activity varied with the plant species and the macromolecular content present in it (Khemakhem, Abdelhedi, Trigui, Ayadi, & Bouaziz, ). The previous study (Tril et al, ) reported that the tamarind powder extract possess antibacterial activity against Listeria innocua , Alcaligenes faecalis , Enterobacter amnigenus , Enterobacter gergoviae at the minimum inhibitory concentration of 50 mg/ml.…”

Section: Resultsmentioning

confidence: 97%

Extraction and characterization of water‐soluble polysaccharides from Tamarindus indica and Pithecellobium dulce seeds

Sivakumar

Kavitha

2019

J Food Process Engineering

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Water‐soluble polysaccharides (WSP) were secluded from Tamarindus indica (TWSP) and Pithecellobium dulce (PWSP) seeds by hot water method. The physico‐chemical properties revealed that the polysaccharides might be used as a potential food additive. The micrometric properties of TWSP and PWSP possessed a bulk density of 0.64 and 0.68 g/ml, respectively. The isolated polysaccharides were subjected to Fourier transform infrared spectroscopy and Nuclear magnetic resonance spectroscopy for its compositional analysis and exhibited that both the isolates are heteropolysaccharides. The spectra of both the mucilages were resonating at δ 3.00–δ 5.00 ppm which confirmed the presence of polysaccharides. Thermo gravimetric analysis showed that the isolated polysaccharides were thermally stable. Scanning electron microscopy and X‐ray diffraction depicted the morphological characteristics. The radical scavenging ability and antibacterial activity proved that the polysaccharides can be explored as a functional food ingredient. Furthermore, the prebiotic potential of polysaccharides stimulated the growth of Lactobacillus delbrueckii and Lactobacillus fermentum over inulin. Practical applications The study provides optimum extraction conditions to obtain TWSP and PWSP seeds using response surface methodology. The isolated polysaccharides can be used as therapeutic agent and as a food additive due to its high purity obtained from Fourier transform infrared spectroscopy and Nuclear magnetic resonance spectroscopic analysis. The excellent flowability and compressibility of polysaccharides can be applied in pharmaceutical formulation as an excipient. The active component present in the isolated polysaccharides can be used as a food preservative. The supplement of TWSP and PWSP as a carbon source accelerated the growth of probiotics which could be used as natural prebiotics. Thus the study concluded that the water‐soluble polysaccharide obtained from the agro‐industrial by product has the wide application in food and pharmaceutical industries.

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“…These effects of antitumor and immune regulation are related to their antioxidant properties (Huang, Mei, & Hu, 2017). The DPPH radical scavenging capacity of polysaccharides was recognized because of the hydrogen donating capacity of polysaccharides (Khemakhem, Abdelhedi, Trigui, Ayadi, & Bouaziz, 2018). In contrast with VC, Figure 7 showed the DPPH free radical scavenging capacity of polysaccharides.…”

Section: Scavenging Capacity On Dpphmentioning

confidence: 99%

Polysaccharides production from soybean curd residue via Morchella esculenta

Tang

Wei

et al. 2019

J Food Biochem

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To minimize the serious environmental pollution caused by food byproducts, soybean curd residue was used as the substrate to ferment polysaccharides by Morchella esculenta. Water‐soluble crude polysaccharides (CMP) were purified by different gradient concentrations (30%, 60%, and 90%) of ethanol into three precipitation fractions. The experimental results indicated that the precipitated polysaccharides by the ethanol concentration of 60% (PMP) had the highest purity, containing rhamnose, arabinose, xylose, mannose, glucose, and galactose, with the molar ratio of 0.08:0.25:0.16:0.07:0.28:1.00. The physicochemical properties were revealed by SEM, AFM, FTIR, NMR, and Congo red test. Furthermore, the measurement of antioxidant activities in vitro demonstrated that PMP exhibited higher antioxidant capacities with the dose‐dependent manner than CMP and polysaccharides from unfermented soybean curd (USP). Overall, the results suggested that PMP had attractive functional activity which could be potentially utilized in functional food industries. Practical applications The polysaccharides from fungi sources are increasingly being used in functional food and pharmaceutical industry. In allusion to the problem of polysaccharides fermented by edible fungi, such as low yield, high cost, and hard to controllable. Soybean curd residue (SCR), a food waste, has been successfully used for the production of polysaccharides and graded ethanol was used to enhance polysaccharides production, lower the difficulty and homologous costs of purity. The results indicated that the purified polysaccharides displayed excellent antioxidant activities on scavenging DPPH and hydroxyl radicals. The outcomes of this work can provide technical support for comprehensive utilization of SCR and references for promotion and application of polysaccharides fermented from SCR via Morchella esculenta in food and medicine fields.

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Structural, antioxidant and antibacterial activities of polysaccharides extracted from olive leaves

Cited by 112 publications

References 41 publications

Antioxidant and antimicrobial activities of a purified polysaccharide from yerba mate (Ilex paraguariensis)

Antioxidant and antimicrobial activities of a purified polysaccharide from yerba mate (Ilex paraguariensis)

Extraction and characterization of water‐soluble polysaccharides from Tamarindus indica and Pithecellobium dulce seeds

Polysaccharides production from soybean curd residue via Morchella esculenta

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