Betulinic acid: a new cytotoxic compound against malignant head and neck cancer cells
Related Experiment Video
Updated: Sep 20, 2026
Intramucosal Inoculation of Squamous Cell Carcinoma Cells in Mice for Tumor Immune Profiling and Treatment Response Assessment
Published on: April 22, 2019
Dietmar Thurnher1, Dritan Turhani, Martina Pelzmann
1Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Vienna, Währinger Gürtel 18-20, A-1090 Vienna, Austria. dietmar.thrunher@univie.ac.at
Background:
A new compound, betulinic acid, has been found to be cytotoxic against a variety of tumor cells originating from the neural crest. Its efficacy against head and neck squamous cellular carcinoma cell lines has so far not been tested.
Methods:
Cell numbers were assayed by automated counting; caspase activation and programmed cell death were determined using an antibody specific for an apoptosis-associated epitope in epithelial cells. The expression pattern of Bcl-2 family members was assessed by Western blotting.
Results:
In two HNSCC cell lines betulinic acid induced apoptosis, which was characterized by a dose-dependent reduction in cell numbers, emergence of apoptotic cells, and an increase in caspase activity. Western blot analysis of the expression of various Bcl-2 family members in betulinic acid-treated cells showed, surprisingly, a suppression of the expression of the proapoptotic protein Bax but no changes in Mcl-1 or Bcl-2 expression.
Conclusion:
These data clearly demonstrate for the first time that betulinic acid has apoptotic activity against HNSCC cells.
Insights
Betulinic acid demonstrates apoptotic activity against head and neck squamous cellular carcinoma (HNSCC) cells. This novel finding reveals its potential as a therapeutic agent for HNSCC treatment.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Betulinic acid exhibits cytotoxicity against various neural crest-derived tumor cells.
- Efficacy of betulinic acid against head and neck squamous cellular carcinoma (HNSCC) cell lines was previously untested.
Purpose of the Study:
- To investigate the apoptotic activity of betulinic acid in HNSCC cell lines.
- To elucidate the molecular mechanisms underlying betulinic acid-induced apoptosis in HNSCC.
Main Methods:
- Automated cell counting to assess cell numbers.
- Caspase activation and apoptosis determination using specific antibodies.
- Western blotting to analyze Bcl-2 family protein expression.
Main Results:
- Betulinic acid induced apoptosis in HNSCC cells, evidenced by reduced cell numbers and increased caspase activity.
- Apoptosis was dose-dependent.
- Surprisingly, betulinic acid suppressed the proapoptotic protein Bax expression without affecting Mcl-1 or Bcl-2 levels.
Conclusions:
- Betulinic acid possesses significant apoptotic activity against HNSCC cells.
- This study provides the first evidence of betulinic acid's efficacy in HNSCC.
- Betulinic acid represents a potential therapeutic candidate for HNSCC treatment.
Related Concept Videos
02:57Targeted Cancer Therapies
There are several types of targeted therapies against specific...
01:27Tumor Immunotherapy