Article (Scientific journals)
Farnesoid X receptor as marker of osteotropism of breast cancers through its role in the osteomimetism of tumor cells
Absil, Lara; Journe, Fabrice; Larsimont, Denis et al.
2020In BMC Cancer, 20, p. 640
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Abstract :
[en] Background: The skeleton is the first and most common distant metastatic site for breast cancer. Such metastases complicate cancer management, inducing considerable morbidities and decreasing patient survival. Osteomimetism is part of the complex process of osteotropism of breast cancer cells. Recent data indicate that Farnesoid X Receptor (FXR) is involved in the transformation and progression of breast cancer. Methods: The expression of FXR, Runt-related transcription factor 2 (RUNX2) and bone proteins were evaluated on two tumor cell lines (MCF-7 and MDA-MB-231) by immunohistochemistry, immunofluorescence and western blotting and quantified. Results: In a series of 81 breast cancer patients who developed distant metastases, we found a strong correlation between FXR expression in primary breast tumors and the development of bone metastases, especially in patients with histological grade 3 tumors. In in vitro studies, FXR activation by Chenodeoxycholic acid (CDCA) increased the expression of numerous bone proteins. FXR inhibition by lithocholic acid and z-guggulsterone decreased bone protein expression. Short Hairpin RNA (ShRNA) against FXR validated the involvement of FXR in the osteomimetism of breast cancer cells. Conclusion: Our experimental results point to a relationship between the expression of FXR in breast cancer cells and the propensity of these tumor cells to develop bone metastases. FXR induces the expression of RUNX2 which itself causes the synthesis of bone proteins by tumor cells.
Disciplines :
Oncology
Biochemistry, biophysics & molecular biology
Author, co-author :
Absil, Lara ;  Université de Mons > Faculté de Médecine et de Pharmacie > Service d'Histologie
Journe, Fabrice  ;  Université de Mons > Faculté de Médecine et de Pharmacie > Service d'Anatomie humaine et Oncologie expérimentale
Larsimont, Denis
Body, Jean-Jacques
Tafforeau, Lionel  ;  Université de Mons > Faculté des Sciences > Service de Biologie cellulaire
Nonclercq, Denis ;  Université de Mons > Faculté de Médecine et de Pharmacie > Service d'Histologie
Language :
English
Title :
Farnesoid X receptor as marker of osteotropism of breast cancers through its role in the osteomimetism of tumor cells
Publication date :
10 July 2020
Journal title :
BMC Cancer
eISSN :
1471-2407
Publisher :
BioMed Central, London, United Kingdom
Volume :
20
Pages :
640
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
M112 - Anatomie humaine et Oncologie expérimentale
M118 - Histologie
S815 - Biologie cellulaire
Research institute :
R550 - Institut des Sciences et Technologies de la Santé
R100 - Institut des Biosciences
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since 16 October 2020

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