Document Type : Original Article

Authors

1 Student Research Committee, Postgraduate student of oral and maxillofacial pathology, Babol University of Medical Sciences, Babol, Iran.

2 Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.

3 Oral Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.

4 Dept. of Immunology, Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.

5 Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.

6 Dental Materials Research Center, Health Institute, Babol University of Medical Sciences, Babol, Iran.

Abstract

Statement of the Problem: Squamous cell carcinoma (SCC) comprises over 90% of oral malignancies. Cisplatin, as a selective chemotherapy agent to treat SCC, has many side effects despite its high effectiveness. There are some studies on the effects of bromelain derived from pineapple stems on different malignancies.
Purpose: The aim of this study was to investigate the effect of bromelain alone and in combination with Cisplatin on oral squamous cell carcinoma (OSCC) and fibroblast cell lines.
Materials and Method: In this interventional study, the HN5 cell line of OSCC and fibroblast cell line were treated with different concentrations of bromelain alone and in combination with cisplatin. Cell viability test was performed after 24, 48 and 72 hours using MTT (3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide) assay. In the final stage, the drug-treated cells underwent flow cytometry to assess apoptosis patterns. Data were analyzed using SPSS 17, ANOVA (for general comparison of groups) and LSD post hoc tests (for comparison two groups). p< 0.05 was considered statistically significant.
Results: The findings suggested that although bromelain showed toxic effects on HN5 cancer cells, its combination with Cisplatin resulted in little improvement in its effectiveness. Bromelain alone and in combination with Cisplatin presented cytotoxic effects against fibroblasts, which depended on the dosage and time exposure (p˂ 0.05). The flow cytometry results did not support the superior effect of the combination of two medications over Cisplatin alone (p> 0.05).
Conclusion: According to the findings, although adding bromelain to Cisplatin reduced toxicity on normal tissues, the combination of these two drugs did not increase the anticancer effect of Cisplatin. Thus, bromelain in combination with Cisplatin is not recommended as an adjuvant drug for OSCC.

Keywords

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