Phospholipidosis assay in immune cells

What is a phospholipidosis assay?

A phospholipidosis assay (PLD assay) is a cell-based, high-throughput screening tool used to detect excessive phospholipid accumulation in lysosomal multilamellar bodies, a common side effect of cationic amphiphilic drugs (CADs). PLD assays in immune cells are commonly used to evaluate immunotoxicity, drug safety, and preclinical outcomes, helping researchers identify potential lysosomal phospholipid accumulation and predict immune-related adverse effects.

Phospholipidosis in immune cells

Phospholipidosis (PLD) in immune cells, such as macrophages dendritic cells and lymphocytes, is triggered when compounds, particularly CADs, cause the accumulation of phospholipids in lysosomes, forming multilamellar bodies (lamellar body formation).

This lysosomal lipid buildup can interfere with key immune cell function, including:

  • Antigen presentation
  • Cytokine release
  • Intracellular signalling and immune response

How immune-cell phospholipidosis assays work

In a typical immune-cell PLD assay, immune cells are cultured in vitro and exposed to test compounds, including CADs. Fluorescent dyes (e.g., LipidTOX™) selectively stain phospholipid-rich lysosomes, allowing visualization of lysosomal multilamellar bodies.

Immune-cell PLD is a key mechanism in drug-induced immunotoxicity, making early detection critical in preclinical drug development.

How to choose an immune-cell phospholipidosis assay

Selecting the right assay depends on your research objectives and immune-cell model.

Essential factors include:

  • Cell type selection
  • Primary monocytes, dendritic cells, macrophages
  • Detection method
  • Flow cytometry

Additional factors such as assay sensitivity, throughput, and reproducibility should also be considered.

Key PLD assay considerations

Several factors influence the accuracy and robustness of immune-cell PLD assays, such as:

  • Cell source
  • Donor variability can affect lysosomal phospholipid accumulation
  • Controls
  • Appropriate positive and negative controls are essential for reliable results

Our immune-cell phospholipidosis assay service

We provide a comprehensive PLD assay service for immune cells, delivering reliable preclinical safety and immunotoxicity data.

Our cell-based PLD assays assess how compounds affect cell safety in immune cells. To measure PLD, we employ fluorescent dyes like Nile Red and LipidTOX™ that specifically highlight lysosomes rich in phospholipids.

Direct access to high-quality immune cells

Through our sister company of BIOMEX, we maintain access to:

  • Source fresh peripheral blood samples with controlled donor characteristics
  • Standardized isolation and culture protocols
  • Diverse donor populations for robust, predictive data
  • Fast turnaround and reproducible results

What we support you with

We partner with you to design and deliver bioassays tailored to your specific needs:

  • Custom immune-cell PLD assay design
  • Selection of optimal immune-relevant cell types
  • Standardized and reproducible workflows
  • Advanced data analysis and expert interpretation

Contact us

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