Cited by 21Nanoparticles: synthesis and applicationsMedicinal Plant ResearchMetal complexes synthesis and properties

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Green synthesis of zinc nanoparticles by hydroalcoholic extract of lavender (Lavandula stoechas L.), characterization, and cytotoxic effects on human breast and colon cancer

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Abstract

Abstract Introduction Green synthesis is the production of metal nanoparticles (MNPs) with biological agents, including plant extracts, without special physical and chemical solutions and conditions. Due to their unique properties, MNPs are used in various sciences and industries. The study aimed to investigate the cytotoxic effects of zinc nanoparticles (ZnNPs) synthesized by the hydroalcoholic extract of lavender plant against human breast cancer cell lines (MCF7) and human colon cancer cell lines (HT29) with the approach of identifying the ability of these NPs to produce anticancer drugs. Method and Materials: ZnNPs are synthesized using the hydroalcoholic extract of the lavender plant. Evaluate and characterize nanoparticles (NPs) by Tyndall effect, UV-Vis, DLS, FT-IR, Zeta-P, Raman spectroscopy, SEM, AFM, and XRD methods. The cytotoxic effects of produced NPs against cancer cell lines MCF7 and HT29 and the healthy cells MCF10a and HGF were measured using the MTT method. Results: According to the findings of DLS analysis, the average size of ZnNPs is 40 and 50, respectively, at a concentration of 3 mM. The cytotoxicity of nanoparticles on MCF7 and HT29 cell lines produces the highest effect after 48 hours. Conclusion: The lavender plant is a suitable option for the green synthesis of ZnNPs and can be used as a stable source for production MNPs. Also, the synthesized ZnNPs showed cytotoxic effects against the examined cancer cells, while they did not cause toxicity to healthy human cells.

Overview

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TL;DR

Hydroalcoholic lavender (*Lavandula stoechas* L.) extract was used to green-synthesize zinc nanoparticles (ZnNPs), which were characterized by multiple methods and tested against MCF7 breast cancer, HT29 colon cancer, and healthy MCF10a/HGF cells. The ZnNPs showed dose- and time-dependent cytotoxicity against cancer cells with lower toxicity to healthy cells after 48 h.

Key findings

  • Optimal synthesis was reported at 3 mM zinc salt, pH 10, 25 °C, and 120 rpm; characterization by Tyndall effect, UV-Vis, DLS, FT-IR, Zeta-P, Raman, SEM, AFM, and XRD confirmed ZnNP formation. DLS gave a hydrodynamic diameter of 50 nm, SEM showed particles between 10 and 50 nm, Raman indicated 3–25 nm, and the discussion reports an average diameter of 27.62 nm; the Zeta-P section reports −27 mV.
  • After 48 h, ZnNPs (A2) had IC50 values of 54.65 µg/mL in MCF7, 65.42 µg/mL in HT29, 140.2 µg/mL in HGF, and 100.1 µg/mL in MCF10a. Cisplatin IC50 values were 65.19 µg/mL in MCF7, 155.2 µg/mL in HT29, 76.38 µg/mL in HGF, and 55.48 µg/mL in MCF10a.
  • Cytotoxicity was concentration- and time-dependent, with the highest effect reported after 48 h; normal HGF and MCF10a cells were more resistant to ZnNPs than the cancer cells.
  • The paper concludes lavender is a suitable stable source for metal nanoparticle production and that the ZnNPs may have biomedical anticancer applications, while calling for further antibacterial, drug-delivery, and anti-adhesion studies.

Methods

  • Lavender was collected around Qom, Iran, and identified as *Lavandula stoechas* L. (SBMU-8303). Hydroalcoholic extract was prepared from 200 g dried ground leaves in 1 L 50/50 distilled water–ethanol for 10 days at 25 °C in the dark, then filtered and evaporated at 45 °C. ZnNPs were synthesized with zinc sulfate/nitrate at 1–5 mM, pH 10, 25 °C, 120 rpm for 24 h, then isolated by ultracentrifugation.
  • Characterization used Tyndall effect, UV-Vis, DLS, FT-IR, Zeta-P, Raman spectroscopy, SEM, AFM, and XRD.
  • Cytotoxicity was tested by MTT assay on MCF7, HT29, MCF10a, and HGF cells obtained from IBRC. Cells were seeded at 5000 cells/well and treated with ZnNPs at 50, 100, 150, 250, and 300 µg/mL and cisplatin; plates were incubated for 24, 48, and 72 h, and optical density was read at 570 nm. IC50 values were calculated with GraphPad Prism 8.2.1 using non-linear regression dose-response curves.

Limitations

  • The paper states that only 48 h results are reported because 24 h was too short for drug effect and 72 h data were unreliable due to culture medium consumption by cells.
  • The paper states that large-scale green synthesis still faces obstacles including uncontrollable final nanoparticle size and shape, difficult scalability, wide raw-material variety, and limited raw-material availability at different times.
  • Evident from the text: all cytotoxicity data are in vitro, with no in vivo or clinical validation; mechanistic claims about apoptosis, cell cycle disruption, and reactive oxygen species are discussed but not experimentally tested in this paper.

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Integrity signals

Registry

Crossref · 10.1038/s41598-024-81295-0

Cites

38 of 38 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Figures

Fig. 1 Color change and Tyndall effect due to green synthesis of NPs, (A) Plant extract before synthesis, (B) Plant extract after synthesis of NPs.
Fig. 1 Color change and Tyndall effect due to green synthesis of NPs, (A) Plant extract before synthesis, (B) Plant extract after synthesis of NPs.CC BY-NC-ND · PubMed Central
Fig. 2 Synthesis absorption curve of ZnNPs in the lavender plant.
Fig. 2 Synthesis absorption curve of ZnNPs in the lavender plant.CC BY-NC-ND · PubMed Central
Fig. 3 Dynamic Light Scattering (DLS) of ZnNPs synthesized by lavender plant extract.
Fig. 3 Dynamic Light Scattering (DLS) of ZnNPs synthesized by lavender plant extract.CC BY-NC-ND · PubMed Central
Fig. 4 FT-IR image of synthesized ZnNPs.
Fig. 4 FT-IR image of synthesized ZnNPs.CC BY-NC-ND · PubMed Central
Fig. 5 Zeta potential results of ZnNPs synthesized by lavender plant extract.
Fig. 5 Zeta potential results of ZnNPs synthesized by lavender plant extract.CC BY-NC-ND · PubMed Central
Fig. 6 Raman spectrum of synthesized ZnNPs.
Fig. 6 Raman spectrum of synthesized ZnNPs.CC BY-NC-ND · PubMed Central
Fig. 7 SEM photo of ZnNPs synthesized by lavender plant.
Fig. 7 SEM photo of ZnNPs synthesized by lavender plant.CC BY-NC-ND · PubMed Central
Fig. 8 AFM image of ZnNPs synthesized by lavender plant (no. 1).
Fig. 8 AFM image of ZnNPs synthesized by lavender plant (no. 1).CC BY-NC-ND · PubMed Central
Fig. 9 AFM image of ZnNPs synthesized by lavender plant (no. 2).
Fig. 9 AFM image of ZnNPs synthesized by lavender plant (no. 2).CC BY-NC-ND · PubMed Central
Fig. 10 AFM image of ZnNPs synthesized by lavender plant (no. 3).
Fig. 10 AFM image of ZnNPs synthesized by lavender plant (no. 3).CC BY-NC-ND · PubMed Central
Fig. 11 XRD graph of synthesized ZnNPs.
Fig. 11 XRD graph of synthesized ZnNPs.CC BY-NC-ND · PubMed Central
Fig. 12 Effect of synthesized ZnNPs on HGF cell line.
Fig. 12 Effect of synthesized ZnNPs on HGF cell line.CC BY-NC-ND · PubMed Central
Fig. 13 Effect of synthesized ZnNPs on HT29 cell line.
Fig. 13 Effect of synthesized ZnNPs on HT29 cell line.CC BY-NC-ND · PubMed Central
Fig. 14 Effect of synthesized ZnNPs on MCF7 cell line.
Fig. 14 Effect of synthesized ZnNPs on MCF7 cell line.CC BY-NC-ND · PubMed Central
Fig. 15 Effect of synthesized ZnNPs on MCF10a cell line.
Fig. 15 Effect of synthesized ZnNPs on MCF10a cell line.CC BY-NC-ND · PubMed Central

Verification

Claims the paper makes

38 Own result · 12 Own interpretation · 5 No basis given · 4 Not checked yet · 3 No full text of the sources

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Show all 39 claims

  • It may state two separate claims as one. 17
  • The quote only partly states this claim. 2
  • Probably not a substantial claim. 9
23 of 23
  • The paper relies on this without support.

    MCF10a and HGF cell lines are valid models of healthy human cells.

    “Cell lines, human breast cancer cells (MCF7), human colon cancer cells (HT29), normal human gingival fibroblasts (HGF), and healthy breast cells (MCF10a) were obtained from the National Center for Genetic and Biological Resources of Iran (IBRC) has been prepared and used.”
  • The paper relies on this without support.

    The particles in the solution have a surface charge and cover surrounding particles.

    “The particles in the solution have a surface charge; in any case, they cover the surrounding particles.”
  • The paper relies on this without support.

    Steric hindrance is one of the most important factors affecting the stability of NPs.

    “In this regard, we can mention the effect of steric hindrance 1 as one of the most important factors affecting the stability of NPs.”
  • The paper relies on this without support.

    The lavender plant is not pathogenic.

    “considering the lack of reports that the lavender plant is pathogenic”
  • The paper relies on this without support.

    ZnNPs have surface plasmon resonance properties and a distinct optical absorption peak in the range of 2.2 keV, and the formation of a peak in this range indicates the formation of NPs.

    “ZnNPs, due to their surface plasmon resonance properties, have a distinct optical absorption peak in the range of 2.2 keV, and the formation of a peak in this range indicates the formation of NPs.”
  • The paper relies on this without support.

    Compounds in plant extracts such as flavonoids, alcohols, organic acids, cytokines, terpenoids, proteins, peptides, vitamins, and saccharides act as reducing agents and convert metal ions into MNPs.

    “Compounds in plant extracts such as flavonoids, alcohols, organic acids, cytokines, terpenoids, proteins, peptides, vitamins, and saccharides act as reducing agents and convert metal ions into MNPs.”
  • The paper relies on this without support.

    Green synthesis of nanoparticles is a bottom-up method, and metabolites of plant extracts containing active compounds of terpenoids, alkaloids, phenols, tannins, and vitamins play the main role in it.

    “The green synthesis of nanoparticles is a bottom-up method, and the metabolites of plant extracts containing active compounds of terpenoids, alkaloids, phenols, tannins, and vitamins play the main role in it.”
  • The paper relies on this without support.

    In green synthesis, active compounds act as reducers, giving electrons to metal particles, causing the formation of nanoparticles, and prevent re-aggregation.

    “In this process, these active compounds act as reducers, giving electrons to metal particles, causing the formation of nanoparticles, and by continuing this process, they prevent re-aggregation.”
  • The paper relies on this without support.

    By binding to cell surface receptors, NPs activate signaling pathways that play an important role in cell growth and survival.

    “By binding to cell surface receptors, NPs activate signaling pathways that play an important role in cell growth and survival.”
  • The paper relies on this without support.

    The green synthesis method reduces final cost, does not produce dangerous waste, is environmentally friendly, and can produce NPs with different properties useful in specific applications.

    “The green synthesis method, which uses plant extracts to produce NPs, helps to reduce the final cost of production on a large scale. Also, unlike chemical methods of NPs synthesis, this method does not produce dangerous waste, is environmentally friendly, and can produce NPs with different properties that are useful in specific applications.”
10 of 10

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3 of 3

Citations

Cites

Show all 35 references

Research works printed but not linked: 1

  1. Bunghez, I. R. et al. Characterization of silver nanoparticles obtained by Lavandula angustifolia extract. Rev. Roum Chim. 60 (5–6), 515–519 (2015).

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Metadata

Authors
Mehdipour, A., Reza, M. A. S., Rasouli, A., Baravati, M. H. J., Jafari, G. A., & Heidari, F.
Affiliations
Qom University of Medical Science and Health Services (IR)
Corresponding author
Reza, Mahdieh Ameri Shah
Venue
Scientific Reports
Published
2024-11-28
Volume
14
Issue
1
Pages
29543-29543
ISSN
2045-2322 (ISSN-L)
OpenAlex
W4404772541
Cited by
21
References
35
Citations by year
2026: 12 · 2025: 9
FWCI
1.84
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by-nc-nd)
  • Research Square (submittedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
Qom University of Medical Science (IR.MUQ.REC.1401.200)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Nanoparticles: synthesis and applications
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Medicinal Plant Research
  • Health Sciences › Medicine › Oncology › Metal complexes synthesis and properties
Keywords
zinc nanoparticles, green synthesis, Lavandula stoechas, lavender extract, hydroalcoholic extract, cytotoxicity, breast cancer, colon cancer, MCF-7 cells, HT-29 cells, anticancer nanoparticles, nanoparticle characterization
MeSH terms
Antineoplastic Agents, Breast Neoplasms, Cell Survival, Colonic Neoplasms, Female, Humans, Plant Extracts, Zinc, HT29 Cells, Lavandula, Cell Line, Tumor, Metal Nanoparticles, Green Chemistry Technology, MCF-7 Cells

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CoChat. (2026). Citation check: Green synthesis of zinc nanoparticles by hydroalcoholic extract of lavender (Lavandula stoechas L.), characterization, and cytotoxic effects on human breast and colon cancer. https://app.cochat.ai/papers/10.1038/s41598-024-81295-0
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Mehdipour, A., Reza, M. A. S., Rasouli, A., Baravati, M. H. J., Jafari, G. A., & Heidari, F. (2024). Green synthesis of zinc nanoparticles by hydroalcoholic extract of lavender (Lavandula stoechas L.), characterization, and cytotoxic effects on human breast and colon cancer. Scientific Reports. https://doi.org/10.1038/s41598-024-81295-0