scholarly journals Alterations in Progesterone Receptor Isoform Balance in Normal and Neoplastic Breast Cells Modulates the Stem Cell Population

Cells ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 2074
Author(s):  
María Sol Recouvreux ◽  
María Inés Diaz Bessone ◽  
Agustina Taruselli ◽  
Laura Todaro ◽  
María Amparo Lago Huvelle ◽  
...  
Keyword(s):  
Stem Cells ◽  
Negative Impact ◽  
Cancer Cell Line ◽  
Human Breast Cancer Cell ◽  
Stem Cell Population ◽  
Human Breast ◽  
Basal Progenitor ◽  
Breast Cells ◽  
Luminal Compartment

To investigate the role of PR isoforms on the homeostasis of stem cells in the normal and neoplastic mammary gland, we used PRA and PRB transgenic mice and the T47D human breast cancer cell line and its derivatives, T47D YA and YB (manipulated to express only PRA or PRB, respectively). Flow cytometry and mammosphere assays revealed that in murine breast, overexpression of PRB leads to an increase in luminal and basal progenitor/stem cells. Ovariectomy had a negative impact on the luminal compartment and induced an increase in mammosphere-forming capacity in cells derived from WT and PRA mice only. Treatment with ICI 182,780 augmented the mammosphere-forming capacity of cells isolated from WT and PRA mice, whilst those from PRB remained unaltered. T47D YB cells showed an increase in the CD44+/CD24Low/− subpopulation; however, the number of tumorspheres did not vary relative to T47D and YA, even though they were larger, more irregular, and had increased clonogenic capacity. T47D and YA tumorspheres were modulated by estrogen/antiestrogens, whereas YB spheres remained unchanged in size and number. Our results show that alterations in PR isoform balance have an impact on normal and tumorigenic breast progenitor/stem cells and suggest a key role for the B isoform, with implications in response to antiestrogens.

scholarly journals Homoeopathic Viscum album (10-3) is More Cytotoxic to in vitro Culture of Human Breast Cancer Cell Line than to Human Mesenchymal Stem Cells

2021 ◽  
Vol 19 (4) ◽  
pp. 25-34
Author(s):  
Ana Catarina Viana Valle ◽  
Lana Ribeiro Aguiar ◽  
Hilana dos Santos Sena Brunel ◽  
Patricia Furtado Malard ◽  
Carla Lujan Pereira Villarroel ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Cell Line ◽  
Culture Medium ◽  
Cancer Cell Line ◽  
Viscum Album ◽  
Human Breast Cancer Cell ◽  
Human Breast ◽  
Mcf 7

BACKGROUND Adenocarcinomas can be of several types, and MCF-7 is an adenocarcinoma of human breast cell line useful as preclinical model to screen therapeutic agents such as ultra-diluted Viscum album, an European plant whose extract is commonly used in cancer therapy. AIMS MCF-7 and mesenchymal stem cells were used to evaluate the in vitro cytotoxicity of homoeopathic Viscum album 1x10-3 (VAD3). METHODS cells were cultured for 24 hours in controlled environment (37.5oC and 5% CO2) in 96-well plates. After this time, VAD3 was added to the culture medium in concentrations varying from 10 to 100 ?L/mL for MTT assay (evaluation of viability of cells). A control group was maintained with culture medium only. After 48 hours, the procedures of analysis of cells viability were performed. RESULTS MTT assay showed that the concentrations of 42 ?L/mL and 62 ?L/mL were able to reduce cell viability to 50% in MCF-7 and mesenchymal stem cells, respectively, which means that half of the cells cultured were dead after 48 hours in contact with VAD3. CONCLUSION Viscum album presented higher cytotoxic action on human breast cancer cell line culture than on mesenchymal stem cells. This medicine is extensively used against cancer, and the use of the homoeopathic form of it brings new possibilities as no or fewer adverse effects would be present.

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