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Updated: Aug 16, 2026
Murine Model of CD40-activation of B cells
Published on: March 5, 2010
Soluble CD40L in plasma of patients with primary biliary cirrhosis
Sabine Oertelt1, Pietro Invernizzi, Carlo Selmi
1Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis School of Medicine, Davis, CA 95616, USA.
Insights
Plasma soluble CD40 ligand (sCD40L) levels were similar in primary biliary cirrhosis (PBC) patients and healthy controls. This study found no significant difference in sCD40L concentrations, suggesting it may not be a key biomarker for PBC.
Area of Science:
- Immunology
- Hepatology
- Autoimmune Diseases
Background:
- CD40 ligand (CD40L) is crucial for immune responses, interacting with CD40 on B cells and endothelial cells.
- CD40L exists in soluble (sCD40L) and membrane-bound forms, playing roles in immunoglobulin switching and cytokine regulation.
- Primary biliary cirrhosis (PBC) involves T cell-mediated targeting of intrahepatic bile ducts.
Purpose of the Study:
- To investigate plasma concentrations of soluble CD40 ligand (sCD40L) in patients with primary biliary cirrhosis (PBC).
- To compare sCD40L levels between PBC patients and age-matched healthy controls.
- To explore potential correlations between sCD40L levels, PBC, and age.
Main Methods:
- Plasma samples were collected from 12 patients with PBC and 12 healthy controls.
- Enzyme-linked immunosorbent assay (ELISA) was used to quantify plasma concentrations of sCD40L.
- Statistical analysis was performed to compare groups and assess correlations.
Main Results:
- No statistically significant difference was found in plasma sCD40L concentrations between PBC patients and healthy controls (P = 0.977).
- No correlation was identified between age and plasma sCD40L levels in the study population (P = 0.24).
Conclusions:
- PBC patients do not exhibit elevated plasma concentrations of sCD40L compared to age-matched controls.
- The findings align with observations in several other autoimmune diseases regarding sCD40L levels.
- Further research into the CD40-CD40L system's role in PBC pathogenesis is warranted.
Abstract:
CD40 ligand (CD40L) is expressed by activated T cells and interacts with the CD40 molecule present on B cells and endothelial cells, promoting immunoglobulin switching in the former and cytokine upregulation in the latter. CD40L exists in both a soluble (sCD40L) and a membrane-bound form. Because primary biliary cirrhosis (PBC) is characterized by targeting of small intrahepatic bile ducts by autoreactive T cells, plasma concentrations of sCD40L were investigated using enzyme-linked immunosorbent assay (ELISA) to measure plasma concentrations of sCD40L in 12 patients with PBC and 12 healthy controls. No difference could be detected between plasma concentrations of sCD40L in patients versus controls (P = 0.977). No correlation between age and plasma levels of sCD40L could be identified (P = 0.24). We concluded that PBC patients do not exhibit higher plasma concentrations of sCD40L than age-matched controls, a finding common to several autoimmune diseases. Further investigation of the CD40-CD40L system is strongly encouraged.
