Phenotypic Changes in Mammary Adenocarcinoma (4T1) cells In Vitro after Treatment with Carcinosinum
Thaís Cristina da Silva1, William Alves Dos Santos1, Sandra A G Pinto1
1Research Center, Graduation Program in Environmental and Experimental Pathology, University Paulista-UNIP, São Paulo, Brazil.
Objective:
The present study aimed to identify possible phenotypic changes in 4T1 (murine mammary adenocarcinoma) cells in vitro, including viability, HER-2 (human epidermal growth factor receptor-type 2) expression, and metastatic potential, after treatment with Carcinosinum in different homeopathic dilutions (12cH, 30cH, 200cH) shaken mechanically in pure, sterile, water from a commercial stock dilution.
Methods:
Treated cells were cultured in R10 medium, using 24-well plates, 105 cells per well, and treated with vehicle, Carcinosinum 12cH, 30cH or 200cH; untreated cells were used as the baseline control. After 24 hours of treatment, the percentage of apoptotic cells was analyzed by annexin V. Cell morphology was evaluated by microscopy after hematoxylin-eosin and Giemsa staining, whilst HER-2 expression was assessed using immunocytochemistry. The metastatic potential was determined by the expression and activity of the enzyme matrix metalloproteinase 9 (MMP-9) using zymography. The cytokine profile was established using the cytometric bead array method.
Result:
Treatment of 4T1 cells in vitro with Carcinosinum 30cH produced an increase in the number of annexin V-positive cells (apoptosis) and decreased expression of proactivated MMP-9. Cells treated with Carcinosinum 200cH presented hyper-expression of HER-2 on the plasma membrane, identified by immunocytochemistry. There were no differences in cytokine production among treatments.
Conclusion:
The data show promising results for Carcinosinum 30cH in vitro, but in vivo studies are also required to evaluate the role of tumor microenvironment in its effects.
Insights
Homeopathic Carcinosinum 30cH increased apoptosis and decreased matrix metalloproteinase 9 in 4T1 cancer cells. Carcinosinum 200cH caused human epidermal growth factor receptor-type 2 (HER-2) overexpression.
Area of Science:
- Oncology
- Homeopathic Medicine
- Cell Biology
Background:
- 4T1 murine mammary adenocarcinoma cells are a model for studying cancer progression.
- Homeopathic dilutions are used in alternative medicine, but their cellular effects require investigation.
- Human epidermal growth factor receptor-type 2 (HER-2) is a key protein in some breast cancers.
Purpose of the Study:
- To investigate the in vitro effects of Carcinosinum homeopathic dilutions on 4T1 cell viability, HER-2 expression, and metastatic potential.
- To assess changes in apoptosis, cell morphology, HER-2 expression, and matrix metalloproteinase 9 (MMP-9) activity.
Main Methods:
- 4T1 cells were treated with Carcinosinum 12cH, 30cH, and 200cH.
- Apoptosis was measured using annexin V staining.
- HER-2 expression was assessed by immunocytochemistry.
- Metastatic potential was evaluated by MMP-9 activity using zymography.
Main Results:
- Carcinosinum 30cH increased apoptosis (annexin V-positive cells) and decreased proactivated MMP-9 expression.
- Carcinosinum 200cH led to HER-2 hyper-expression on the cell membrane.
- No significant changes in cytokine profiles were observed across treatments.
Conclusions:
- Carcinosinum 30cH shows potential in vitro effects on 4T1 cells, specifically increasing apoptosis and reducing metastatic potential markers.
- Carcinosinum 200cH induced HER-2 overexpression, warranting further investigation.
- In vivo studies are necessary to confirm these findings and explore the role of the tumor microenvironment.
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