Mesenchymal stromal cell response to intervertebral disc-like pH is tissue source dependent

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Cell Biology

Background:

• Intervertebral disc degeneration (IVDD) is a major cause of low back pain, with limited treatment options.
• Mesenchymal stromal cells (MSCs) offer a promising therapeutic approach for IVD regeneration.
• The acidic microenvironment of degenerated discs may affect MSC efficacy.

Purpose of the Study:

• To investigate the response of MSCs from different tissue sources to the low pH conditions found in degenerated intervertebral discs.
• To explore the mechanisms underlying MSC behavior in acidic environments.
• To determine if MSC source influences their response to low pH for optimizing cell-based therapies.

Main Methods:

• Culturing adipose, bone marrow, and amniotic membrane-derived MSCs at low pH levels mimicking IVDD.
• Assessing MSCs for viability, proliferation, senescence, metabolic activity, and cytokine release.
• Utilizing western blot to analyze acid-sensing ion channel (ASIC) expression.

Main Results:

• Low pH significantly impaired MSC viability, proliferation, senescence, and metabolic activity.
• Acidic conditions altered the cytokine production profile of MSCs.
• MSC responses to low pH varied depending on the tissue source.

Conclusions:

• The efficacy of MSC therapy for IVD regeneration is influenced by the acidic microenvironment of degenerated discs.
• MSC behavior in low pH is tissue-specific, necessitating careful selection of cell sources.
• Further research is needed to enhance MSC function in acidic conditions for improved IVD tissue regeneration.