Related Experiment Video

Updated: Jul 19, 2026

The bm12 Inducible Model of Systemic Lupus Erythematosus (SLE) in C57BL/6 Mice
12:04

The bm12 Inducible Model of Systemic Lupus Erythematosus (SLE) in C57BL/6 Mice

Published on: November 1, 2015

Modulation of CR1 transcript in systemic lupus erythematosus (SLE) by IFN-gamma and immune complex

Vaishali Arora1, Abdul Matin Mondal, Rahul Grover

  • 1Department of Biochemistry, All India Institute of Medical Sciences, New Delhi 110029, India.

Molecular Immunology
|October 20, 2006
PubMed

Insights

Neutrophil CR1 transcript levels are significantly lower in systemic lupus erythematosus (SLE) patients. Interferon-gamma (IFN-gamma) upregulates CR1, while immune complexes downregulate it, highlighting their roles in SLE pathophysiology.

Area of Science:

  • Immunology
  • Molecular Biology
  • Rheumatology

Background:

  • Reduced Erythrocyte Complement Receptor 1 (E-CR1) expression is linked to systemic lupus erythematosus (SLE) pathophysiology.
  • Neutrophil Complement Receptor 1 (N-CR1) transcript levels and their regulation in SLE are not fully understood.

Purpose of the Study:

  • To quantify N-CR1 transcript levels in SLE patients versus healthy individuals.
  • To investigate the modulatory effects of interferon-gamma (IFN-gamma), interleukin-4 (IL-4), and immune complexes (IC) on N-CR1 expression in SLE.

Main Methods:

  • Real-time RT-PCR was used to measure CR1 transcript levels in neutrophils.
  • Neutrophils from 25 untreated active SLE patients and 25 healthy controls were analyzed.
  • The impact of IFN-gamma, IL-4, and IC on CR1 transcript levels was assessed.

Main Results:

  • SLE patients exhibited significantly lower N-CR1 transcript levels compared to controls.
  • IFN-gamma upregulated N-CR1 transcript in both groups, while IC downregulated it in SLE patients.
  • IC and IL-4 partially suppressed the IFN-gamma-induced upregulation of N-CR1.

Conclusions:

  • N-CR1 transcript is markedly reduced in active SLE.
  • IFN-gamma and IC act as positive and negative modulators, respectively, of N-CR1 transcript in SLE.
  • These findings provide novel insights into the molecular mechanisms underlying SLE pathogenesis.

More Related Videos

High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment07:26

High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment

Published on: July 18, 2017

Related Concept Videos

Inflammatory Bowel Disease III: Crohn's Disease01:25

Inflammatory Bowel Disease III: Crohn's Disease

Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Inflammatory Response01:28

Inflammatory Response

An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Drugs for Treatment of Crohn's Disease in IBD Using Biologic Agents: Anti-TNF01:24

Drugs for Treatment of Crohn's Disease in IBD Using Biologic Agents: Anti-TNF

Tumor Necrosis Factor (TNF), a proinflammatory cytokine, contributes significantly to the inflammation seen in Crohn's disease. It exists as soluble TNF and membrane-bound TNF, with actions mediated through TNF receptors (TNFR). TNFR activation leads to the release of proinflammatory cytokines, T-cell activation, collagen production, and leukocyte migration, all contributing to inflammation in Crohn's disease. Anti-TNF monoclonal antibodies, namely infliximab (Remicade), adalimumab (Humira),...