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Cited by 16Essential Oils and Antimicrobial ActivityNanocomposite Films for Food PackagingNanoparticles: synthesis and applications

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Induction role of chitosan nanoparticles to Anethum graveolens extract against food-borne bacteria, oxidant, and diabetic activities in vitro

Open access
Mashraqi, Abdullah·2023·Frontiers in Microbiology

Abstract

Foodborne diseases as well as Foodborne pathogens are a global issue with significant effects on human health and economy. Therefore, several investigators have tried to find new alternative approaches to prevent and control this problem. In this context, the present study aimed to find some possible and effective approaches for controlling food-borne bacteria via Dill (Anethum graveolens L.) extract (DE) loaded with chitosan nanoparticles (ChNPs) besides its anti-oxidant and anti-diabetic activities. Flavonoid and phenolic contents of DE were detected by HPLC, indicating the presence of 18 constituents, high content (22526.51 μg/mL) of chlorogenic acid, followed by 2236.21 μg/mL of coumaric acid and 2113.81 μg/mL of pyrocatechol. In contrast, low contents of cinnamic acid, methyl gallate, apigenin, daidzein, quercetin, syringic acid, and kaempferol were detected.B. cereus,Staphylococcus aureus, E. coli, S. typhi, E. faecalis, and C. albicans were highly inhibited by DE loaded ChNPs (DELChNPs) with inhibition zones (IZs) of 28.50 ± 0.87, 30.33 ± 0.58, 29.33 ± 0.58, 23.17 ± 0.76, 25.76 ± 0.58, and 24.17 ± 0.29 mm with MIC 15.41 ± 0.36, 7.70 ± 0.17, 15.58 ± 0.07, 31.08 ± 0.07, 31.04 ± 0.07 and 62.33 ± 0.29 μg/mL compared with inhibitory activity caused by DE, where the IZs were 25.83 ± 1.44, 29.67 ± 0.85, 24.83 ± 0.76, 20.33 ± 1.53, 21.17 ± 0.29, and 19.67 ± 1.15 mm with MIC 62.33 ± 0.29, 31.08 ± 0.07, 62.50 ± 0.29, 31.08 ± 0.07, 31.04 ± 0.07, and 249.0 ± 1.73 μg/mL, respectively. Also, the minimum bactericidal concentration (MBC) of DELChNPs was less than DE against all tested microorganisms. The MBC/MIC index documented that DELChNPs were more effective than DE. The biofilm of tested bacteria was inhibited by DE and DELChNPs but with different levels of anti-biofilm activity. For example, the anti-biofilm activity was 79.26 and 86.15% against B. cereus using DE and DELChNPs, respectively. DELChNPs and DE, compared with the ascorbic acid, exhibited DPPH scavenging % with IC 50 values of 7.8 μg/mL, 13.96 μg/mL, and 4.83 μg/mL, respectively. Anti-diabetic activity in vitro via inhibition of amylase indicated that IC 50 was 164.2 μg/mL and 164.3 μg/mL using DE and DELChNPs, respectively. This investigation highlights the vital DE phytoconstituents, particularly DELChNPs which possess important therapeutic effects against food-borne microorganisms and could be utilized as a safe alternative to synthetic drugs.

Overview

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TL;DR

This in vitro study characterized Anethum graveolens extract (DE) by HPLC and tested DE loaded with chitosan nanoparticles (DELChNPs) against food-borne microorganisms, oxidant activity, and α-amylase inhibition. Loading DE into chitosan nanoparticles improved antimicrobial, anti-biofilm, and antioxidant activity, but did not meaningfully improve anti-diabetic activity.

Key findings

  • HPLC detected 18 phenolic/flavonoid constituents in DE, with chlorogenic acid highest at 22,526.51 μg/mL, followed by coumaric acid at 2,236.21 μg/mL and pyrocatechol at 2,113.81 μg/mL; lower levels included cinnamic acid (18.45 μg/mL), methyl gallate (24.44 μg/mL), apigenin (32.62 μg/mL), daidzein (34.93 μg/mL), quercetin (46.19 μg/mL), syringic acid (58.06 μg/mL), and kaempferol (71.18 μg/mL).
  • DELChNPs produced larger inhibition zones than DE against B. cereus (28.50 ± 0.87 vs 25.83 ± 1.44 mm), S. aureus (30.33 ± 0.58 vs 29.67 ± 0.85 mm), E. coli (29.33 ± 0.58 vs 24.83 ± 0.76 mm), S. typhi (23.17 ± 0.76 vs 20.33 ± 1.53 mm), E. faecalis (25.76 ± 0.58 vs 21.17 ± 0.29 mm), and C. albicans (24.17 ± 0.29 vs 19.67 ± 1.15 mm). MIC values were also lower for DELChNPs, e.g., S. aureus 7.70 ± 0.17 vs 31.08 ± 0.07 μg/mL and C. albicans 62.33 ± 0.29 vs 249.0 ± 1.73 μg/mL.
  • Anti-biofilm activity against B. cereus at 75% MBC was 79.26% for DE and 86.15% for DELChNPs. DPPH IC50 values were 7.8 μg/mL for DELChNPs, 13.96 μg/mL for DE, and 4.83 μg/mL for ascorbic acid.
  • α-Amylase inhibition IC50 values were 164.2 μg/mL for DE and 164.3 μg/mL for DELChNPs, indicating negligible enhancement of anti-diabetic activity by chitosan loading.

Methods

  • In vitro experimental study using aerial parts of A. graveolens collected from Jazan, Saudi Arabia; methanol extract was prepared, and DE was loaded into chitosan nanoparticles, with TEM showing DELChNPs diameters between 100 and 200 nm.
  • Phenolic/flavonoid constituents were identified and quantified by HPLC with standards. Antimicrobial activity was assessed by well diffusion, MIC by microdilution, MBC, and anti-biofilm activity by crystal violet assay against food-borne microorganisms; antioxidant activity used DPPH scavenging, and anti-diabetic activity used α-amylase inhibition with DNSA.
  • Experiments were performed in triplicate; standard deviation and variance were analyzed with SPSS v22.0, and IC50 values were calculated using GraphPad Prism v5.0.

Limitations

  • The paper does not state a limitations section.
  • Evident from the text: all assays were in vitro, with no in vivo, food-matrix, toxicity, or clinical validation reported.
  • Evident from the text: the methods list five microbial strains, but results include six organisms (including S. typhi), and the anti-diabetic effect showed no meaningful improvement with chitosan loading.

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Integrity signals

Registry

Crossref · 10.3389/fmicb.2023.1209524

Cites

44 of 44 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Figures

FIGURE 1 Aerial parts of Dill (Anethum graveolens), which underwent successful extraction process and multiple relevant assesses to detect the phytoconstituents, antimicrobial and antioxidant, and anti-diabetic activities.
FIGURE 1 Aerial parts of Dill (Anethum graveolens), which underwent successful extraction process and multiple relevant assesses to detect the phytoconstituents, antimicrobial and antioxidant, and anti-diabetic activities.CC BY · PubMed Central
FIGURE 2 Chromatogram of flavonoid and phenolic constituents identified by HPLC in Anethum graveolens extract.
FIGURE 2 Chromatogram of flavonoid and phenolic constituents identified by HPLC in Anethum graveolens extract.CC BY · PubMed Central
FIGURE 3 Flavonoid and phenolic constituents chemical formulas detected in Anethum graveolens extract.
FIGURE 3 Flavonoid and phenolic constituents chemical formulas detected in Anethum graveolens extract.CC BY · PubMed Central
FIGURE 4 TEM DELChNPs.
FIGURE 4 TEM DELChNPs.CC BY · PubMed Central
FIGURE 5 Antimicrobial activity of DE (3), DELChNPs (4), antibiotic/antifungal as a positive control (2), and chitosan (1) toward food-borne microorganisms via well diffusion assays.
FIGURE 5 Antimicrobial activity of DE (3), DELChNPs (4), antibiotic/antifungal as a positive control (2), and chitosan (1) toward food-borne microorganisms via well diffusion assays.CC BY · PubMed Central
FIGURE 6 Anti-biofilm activity of different treatments 75% MBC DELChNPs (1), 50% MBC DELChNPs (2), 25% MBC DELChNPs (3), 75% of MBC DE (4), 50% of MBC DE (5), 25% of MBC DE (6) against different bacterial species.
FIGURE 6 Anti-biofilm activity of different treatments 75% MBC DELChNPs (1), 50% MBC DELChNPs (2), 25% MBC DELChNPs (3), 75% of MBC DE (4), 50% of MBC DE (5), 25% of MBC DE (6) against different bacterial species.CC BY · PubMed Central

Verification

Claims the paper makes

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Citations

Cites

Research works printed but not linked: 4

  1. Devi, 2015, Encapsulation of Staphylokinase and Leucasaspera plant extracts using chitosan nanoparticles., Int. J. Pharmtech. Res., 7, 654
  2. Ebrahim Abbasi, 2012, Effects of walnut on lipid profile as well as the expression of sterol-regulatory element binding protein-1c (SREBP-1c) and peroxisome proliferator activated receptors α (PPARα) in diabetic rat., Food Nutr. Sci., 3
  3. Peerakam, 2014, Chemical compositions, antioxidant and antibacterial activities of essential oils from Anethum graveolens L. and Trachyspermum roxburghianum (DC.) Craib grown in Thailand., J. Nat. Sci. Res., 4, 62
  4. Tanruean, 2014, Antibacterial and antioxidant activities of Anethum graveolens L. dried fruit extracts., Chiang Mai J. Sci., 41, 649

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Metadata

Authors
Mashraqi, A.
Affiliations
Jazan University (SA)
Corresponding author
Mashraqi, Abdullah
Venue
Frontiers in Microbiology
Published
2023-07-04
Volume
14
Pages
1209524-1209524
ISSN
1664-302X (ISSN-L)
OpenAlex
W4383069066
Cited by
16
References
44
Citations by year
2026: 2 · 2025: 8 · 2024: 3 · 2023: 3
FWCI
1.82
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Microbiology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
  • Physical Sciences › Materials Science › Biomaterials › Nanocomposite Films for Food Packaging
  • Physical Sciences › Materials Science › Materials Chemistry › Nanoparticles: synthesis and applications
Keywords
chitosan nanoparticles, dill, dill extract, foodborne bacteria, antibacterial activity, antifungal activity, antioxidant activity, antidiabetic activity, chlorogenic acid, phenolic compounds, flavonoids, Bacillus cereus, Staphylococcus aureus, Escherichia coli, Salmonella typhi, Enterococcus faecalis, Candida albicans, food preservation, natural food preservatives, oxidative stress, blood glucose, lipid profile, HOMA-IR

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