Transcriptomic Response to Acidosis Reveals Its Contribution to Bone Metastasis in Breast Cancer Cells

Area of Science:

• Oncology
• Metabolic Research
• Genomics

Background:

• Bone is a frequent site for breast cancer metastasis.
• Acidosis, a condition linked to osteoporosis, is known to promote metastasis.
• Understanding the molecular mechanisms linking acidosis and bone metastasis is crucial.

Purpose of the Study:

• To investigate how acidosis influences gene expression in breast cancer cells relevant to bone metastasis.
• To compare the transcriptomic effects of acidosis with those observed in bone metastasis and tumors.
• To identify shared biological pathways between acidosis and bone metastasis.

Main Methods:

• Differential gene expression analysis of MDA-MB-231 cells under acidosis.
• Comparison with gene expression data from bone metastasis and tumors using Biojupies and GEO2R.
• Pathway enrichment analysis using CytoHubba and STRING.
• Secretome analysis in osteoporosis-associated mesenchymal stem cells.

Main Results:

• Acidosis-induced transcriptomic changes more closely resemble bone metastasis than bone metastatic tumors.
• Extracellular matrix (ECM) organization is a key shared biological process.
• Upregulated secretome genes in acidosis, bone metastasis, and osteoporosis are enriched for ECM organization and angiogenesis.

Conclusions:

• Acidosis may play a significant role in the metastatic niche rather than the primary tumor.
• Acidosis potentially promotes bone metastasis by enhancing ECM organization.
• Osteoporosis may facilitate bone metastasis by increasing the secretion of ECM organization proteins.