B-Lineage Cell Counts in Lupus Nephritis Biopsies via 5-Plex Immunofluorescence

A 2026 methodology paper details a validated 5-plex immunofluorescence workflow for quantifying B-lineage cells in formalin-fixed, paraffin-embedded (FFPE) human lupus nephritis kidney tissue. The study analyzed eight LN biopsy tissue blocks and two tonsils, establishing cell definitions for B cells, plasma cells, and plasmablasts. The method is designed for deployment in larger clinical trials to assess the impact of B-cell depletion therapies.

Use Cases

• Validate the CD79a marker as a superior anchor for B cell burden assessment in FFPE tissue compared to CD19.
• Analyze the spatial frequencies of CD138+/CD38+/Ki-67- plasma cells versus CD138+/CD38+/Ki-67+ plasmablasts in renal biopsies.
• Apply the defined cell classification rules (e.g., CD79a+/CD138- for B cells) to overcome challenges of variable CD138 expression in tubular epithelium.
• Compare cell densities (e.g., ~250 cells/mm² for B cells and plasma cells) between different lupus nephritis tissue samples.

Strengths

• Validated on a specific set of eight lupus nephritis biopsy tissue blocks and two tonsil samples.
• Provides precise, operationally defined cell classifications (e.g., B cells as CD79a+/CD138-) to ensure unambiguous analysis.
• The methodology is explicitly designed and validated for fit-for-purpose deployment in clinical trial contexts.
• Includes quantitative findings such as average cell frequencies (~250 cells/mm² for B cells/PCs, ~14 cells/mm² for PBs).

Limitations

• The dataset scope is limited to the methodological description and results from 10 total tissue blocks (8 LN, 2 tonsil).
• The primary data (cell counts, images) are not provided as a structured table; the 78.1 KB file is a PDF containing the paper and figures.
• Sample size for validation is small, limiting generalizability until applied to larger clinical cohorts as proposed.

Provenance

Source

Caleb Chan via figshare.

Collection Method

Targeted 5-plex immunofluorescence and digital image analysis workflow applied to FFPE human kidney and tonsil tissues.

Time Range

Study published in 2026; specific collection dates of biopsies are not provided.

Freshness

Last updated March 2026.

Geography

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