Title:Modulation of Caco-2 Colon Cancer Cell Viability and CYP2W1 Gene Expression by
Hesperidin-treated Lacticaseibacillus rhamnosus GG (LGG) Cell-free Supernatants
Volume: 24
Issue: 5
Author(s): Merve Akkulak, Emre Evin, Ozlem Durukan, Hasan Ufuk Celebioglu and Orhan Adali*
Affiliation:
- Department of Biological Sciences, Faculty of Science, Middle East Technical University, Ankara, 06800, Turkey
Keywords:
Colon cancer, CYP2W1, hesperidin, Lacticaseibacillus rhamnosus GG, cell-free supernatant, probiotics.
Abstract:
Background and Objective: Ensuring colon homeostasis is of significant influence on colon cancer
and delicate balance is maintained by a healthy human gut microbiota. Probiotics can modulate the diversity of
the gut microbiome and prevent colon cancer. Metabolites/byproducts generated by microbial metabolism significantly
impact the healthy colonic environment. Hesperidin is a polyphenolic plant compound well known for its
anticancer properties. However, low bioavailability of hesperidin after digestion impedes its effectiveness.
CYP2W1 is a newly discovered oncofetal gene with an unknown function. CYP2W1 gene expression peaks
during embryonic development and is suddenly silenced immediately after birth. Only in the case of some types
of cancer, particularly colorectal and hepatocellular carcinomas, this gene is reactivated and its expression is
correlated with the severity of the disease. This study aimed to investigate the effects of hesperidin-treated Lacticaseibacillus
rhamnosus GG (LGG) cell-free supernatants on CaCo2 colon cancer cell viability and CYP2W1
gene expression.
Methods: Alamar Blue cell viability assay was used to investigate the cytotoxic effect of cell-free supernatant of
LGG grown in the presence of hesperidin on CaCo2 cells. To observe the effect of cell-free supernatants of LGG
on the expression of CYP2W1 gene, qRT-PCR was performed.
Results: Five times diluted hesperidin treated cell-free supernatant (CFS) concentration considerably reduced
CaCo2 colon cancer cell viability. Furthermore, CYP2W1 gene expression was similarly reduced following CFS
treatments and nearly silenced under probiotic bacteria CFS treatment.
Conclusion: The CYP2W1 gene expression was strongly reduced by cell-free supernatants derived from LGG
culture, with or without hesperidin. This suggests that the suppression may be due to bacterial byproducts rather
than hesperidin. Therefore, the CYP2W1 gene in the case of deregulation of these metabolites may cause
CYP2W1-related colon cancer cell proliferation.