Cited by 82Probiotics and Fermented FoodsCancer Research and TreatmentsCell death mechanisms and regulation

Heat-killed probiotic bacteria induce apoptosis of HT-29 human colon adenocarcinoma cell line via the regulation of Bax/Bcl2 and caspases pathway

Karimi Ardestani, S, Tafvizi, F, Tajabadi Ebrahimi, M·2019·Human & Experimental Toxicology

Abstract

Apoptosis induction in cancer cells is one of the most efficient ways to treat cancer and find anticancer compounds. The aim of this study was to evaluate the cytotoxic effects of heat-killed indigenous probiotic bacteria and apoptosis induction in the HT-29 human colon adenocarcinoma cell line. The growth-inhibitory effects of probiotic heat-killed Lactobacillus brevis and Lactobacillus paracasei isolated from the traditional Iranian food “Terxine” on the HT-29 cell line were determined by 3-(4,5-dimethylthiazolyl-2)-2, 5-diphenyltetrazolium bromide (MTT) assay. Flow cytometry by Annexin-FITC kit, DNA fragmentation assay, 4,6-diamidino-2-phenylindole staining, and the expression of Bax, Bcl2, caspase-3, and caspase-9 were used to analyze apoptosis. MTT results demonstrated that the heat-killed bacteria inhibited the proliferation of HT-29 cells and induced apoptosis in a time-, dose-, and strain-dependent manner. The results demonstrated that both bacteria could induce apoptosis in the HT-29 cell line. Heat-killed probiotic bacteria increased the expression of Bax, caspase-3, and caspase-9 mRNA levels in HT-29 cell lines. Also, heat-killed probiotic bacteria reduced the expression of Bcl2 in HT-29 cells. The heat-killed probiotic bacteria in this study exhibited potent growth inhibitory effects on cancer cells. The results demonstrated that L. brevis has a greater ability to inhibit the growth of HT-29 cells and induce apoptosis, compared with L. paracasei. It is proposed that these bacteria can be used as biological products for the treatment and prevention of cancer, pending further investigation.

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Crossref · 10.1177/0960327119851255

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Authors
Karimi Ardestani, S., Tafvizi, F., & Tajabadi Ebrahimi, M.
Affiliations
  • Department of Biology, Parand Branch, Islamic Azad University, Parand, Iran
  • Islamic Azad University of Parand (IR)
  • Department of Biology, Central Tehran Branch, Islamic Azad University, Tehran, Iran
Corresponding author
Tafvizi, F
Venue
Human & Experimental Toxicology
Published
2019-05-22
Volume
38
Issue
9
Pages
1069-1081
ISSN
  • 0960-3271 (ISSN-L)
  • 1477-0903
OpenAlex
W2946487898
Cited by
82
References
51
Citations by year
2026: 11 · 2025: 19 · 2024: 21 · 2023: 8 · 2022: 14 · 2021: 4 · 2020: 5
FWCI
4.44
Type
journal article
Language
en
Open access
closed
Locations
  • Human & Experimental Toxicology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Islamic Azad University
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Cancer Research and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
apoptosis, HT-29 cells, colon adenocarcinoma, Lactobacillus brevis, Lactobacillus paracasei, Bax/Bcl-2 ratio, caspase-3, caspase-9, anticancer activity, bacterial cytotoxicity
MeSH terms
Lacticaseibacillus paracasei, Adenocarcinoma, Colonic Neoplasms, Hot Temperature, Humans, Signal Transduction, Apoptosis, HT29 Cells, Proto-Oncogene Proteins c-bcl-2, Probiotics, Levilactobacillus brevis, Caspase 3, Caspase 9

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