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Updated: May 30, 2026

Monitoring Endoplasmic Reticulum Calcium Homeostasis Using a Gaussia Luciferase SERCaMP
Published on: September 6, 2015
Altered Endoplasmic Reticulum Calcium Pump Expression during Breast Tumorigenesis
Béla Papp1, Jean-Philippe Brouland
1Institut National de la Santé et de la Recherche Médicale, Inserm UMR-S 940, Institut Universitaire d'Hématologie, 16, rue de la Grange aux Belles, 75010 Paris, Université Paris Diderot, Sorbonne Paris Cité
The study found that Sarco/Endoplasmic Reticulum Calcium ATPase 3 (SERCA3) expression decreases in early breast lesions and correlates with tumor malignancy. This suggests altered endoplasmic reticulum calcium homeostasis during breast tumorigenesis.
Area of Science:
- Cell Biology
- Oncology
- Biochemistry
Background:
- Endoplasmic reticulum calcium homeostasis is crucial for cell functions like proliferation and secretion.
- Sarco/Endoplasmic Reticulum Calcium ATPases (SERCA enzymes) regulate calcium uptake into the endoplasmic reticulum.
Purpose of the Study:
- To investigate SERCA3 expression in normal breast tissue and its benign/malignant lesions.
- To correlate SERCA3 expression with tumor cell type, malignancy grade, and molecular markers.
Main Methods:
- Investigated SERCA3 expression in various breast tissue samples (normal, benign, malignant).
- Analyzed expression in relation to histological and molecular tumor parameters.
Main Results:
- Normal breast acinar cells show high SERCA3 expression, which decreases in benign lesions (adenosis) and lobular carcinomas.
- Normal duct epithelium has significant SERCA3, but expression drops in benign ductal lesions and ductal adenocarcinoma.
- Loss of SERCA3 correlates with higher Elston-Ellis grade, negative hormone receptors, and triple-negative status in ductal carcinomas.
Conclusions:
- SERCA3 expression is significantly reduced in early stages of breast tumorigenesis.
- Decreased SERCA3 is linked to histological and molecular indicators of ductal carcinogenesis.
- Endoplasmic reticulum calcium homeostasis is remodeled during breast cancer development.
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