Abstract
As a leading global cause of mortality, cancer continues to pose a significant challenge. The shortcomings of prevalent cancer treatments, such as surgery, radiation therapy, and chemotherapy, necessitate the exploration of alternative therapeutic strategies. Selenium nanoparticles (SeNPs) have emerged as a promising solution, with their synthesis being widely researched due to their potential applications. Among the diverse synthesis methods for SeNPs, the green chemistry approach holds a distinctive position within nanotechnology. This research delves into the anti-proliferative and anticancer properties of green-synthesized SeNPs via the cell-free supernatant (CFS) of Lactobacillus casei (LC-SeNPs), with a specific focus on MCF-7 and HT-29 cancer cell lines. SeNPs were synthesized employing the supernatant of L. casei. The characterization of these green-synthesized SeNPs was performed using TEM, FE-SEM, XRD, FT-IR, UV–vis, energy-dispersive X-ray spectroscopy, and DLS. The biological impact of LC-SNPs on MCF-7 and HT-29 cancer cells was examined via MTT, flow cytometry, scratch tests, and qRT-PCR. Both FE-SEM and TEM images substantiated the spherical shape of the synthesized nanoparticles. The biosynthesized LC-SNPs reduced the survival of MCF-7 (by 20%) and HT-29 (by 30%) cells at a concentration of 100 μg/mL. Flow cytometry revealed that LC-SNPs were capable of inducing 28% and 23% apoptosis in MCF-7 and HT-29 cells, respectively. In addition, it was found that LC-SNPs treated MCF-7 and HT-29 cells were arrested in the sub-G1 phase. Gene expression analysis indicated that the expression levels of the CASP3, CASP9, and BAX genes were elevated after treating MCF-7 and HT-29 cells with LC-SNPs. Further, SeNPs were observed to inhibit migration and invasion of MCF-7 and HT-29 cancer cells. The SeNPs, produced via L. casei, demonstrated strong anticancer effects on MCF-7 and HT-29 cells, suggesting their potential as biological agents in cancer treatment following additional in vivo experiments.
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Data Availability
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- SeNPs:
-
Selenium nanoparticles
- CFS:
-
Cell-free supernatant
- L. casei :
-
Lactobacillus casei
- LC-SeNPs:
-
Green-synthesized SeNPs via the cell-free supernatant (CFS) of Lactobacillus casei
- CRC:
-
Colorectal cancer
- Se:
-
Selenium
- ROS:
-
Reactive oxygen species
- UV-vis:
-
Ultraviolet-visible spectroscopy
- SEM:
-
Field emission scanning electron microscopy
- EDX:
-
Energy-dispersive X-ray spectroscopy
- TEM:
-
Transmission electron microscopy
- XRD:
-
X-ray powder diffraction
- FT-IR:
-
Fourier transform infrared spectroscopy
- DLS:
-
Dynamic light scattering particle size distribution analysis
- HFF:
-
Human foreskin fibroblasts
- RT:
-
Reverse transcriptase
- IC50 :
-
Half maximal inhibitory concentration
- DAPI:
-
4′,6-Diamidino-2-phenylindole dihydrochloride
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The authors would like to acknowledge the Cellular and Molecular Research Center, Islamic Aazad University.
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Z. H. M. N.: data curation, formal analysis, methodology, writing — original draft. F. T.: methodology, project administration, data curation, supervision, writing — review and editing. K. A.: assisted in performing the cell culture experiments. N. KD.: assisted in performing the cell culture experiments. B. K.: assisted in performing the cell culture experiments. All authors have read and agreed to the published version of the manuscript.
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Haji Mehdi Nouri, Z., Tafvizi, F., Amini, K. et al. Enhanced Induction of Apoptosis and Cell Cycle Arrest in MCF-7 Breast Cancer and HT-29 Colon Cancer Cell Lines via Low-Dose Biosynthesis of Selenium Nanoparticles Utilizing Lactobacillus casei. Biol Trace Elem Res 202, 1288–1304 (2024). https://doi.org/10.1007/s12011-023-03738-5
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DOI: https://doi.org/10.1007/s12011-023-03738-5