Related Experiment Video
Updated: Oct 5, 2025
Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
Published on: June 8, 2022
Role of Direct Immunofluorescence Microscopy in Spectrum of Diffuse Proliferative Glomerulonephritis: A Single-Center
Sonal Jain1, Shivangi Chauhan1, Sonali Dixit1
1Department of Pathology, University College of Medical Sciences and Guru Teg Bahadur Hospital, New Delhi, India.
Insights
Immunofluorescence microscopy combined with light microscopy and clinical data is crucial for diagnosing diffuse proliferative glomerulonephritis (DPGN). Lupus nephritis was the most common DPGN type identified in this study.
Area of Science:
- Nephrology
- Pathology
- Immunology
Background:
- Immunofluorescence (IF) microscopy is essential for analyzing glomerular diseases.
- Diffuse proliferative glomerulonephritis (DPGN) diagnosis relies on integrating IF, light microscopy (LM), and clinical findings.
- Evaluating the spectrum of DPGN is critical for understanding and managing kidney diseases.
Purpose of the Study:
- To assess the diagnostic significance of IF microscopy alongside LM and clinical data in DPGN.
- To determine the spectrum of DPGN in the institute's patient population.
- To establish a rational approach for evaluating kidney biopsies with a DPGN pattern.
Main Methods:
- Analysis of 95 kidney biopsies over 10 years using LM and IF.
- Documentation of clinical details using a predesigned form.
- Correlation of microscopic findings with clinical presentations.
Main Results:
- Nephrotic syndrome was the most frequent clinical presentation (49.4%).
- Lupus nephritis (LN) was the most common DPGN subtype (35.7%), followed by IgA nephropathy (25.2%) and postinfectious GN (16.8%).
- Characteristic IF deposits were observed: C3/IgG in LN, IgA in IgA nephropathy, IgG/C3 in MPGN, and IgG in PIGN.
Conclusions:
- Nephrotic syndrome and lupus nephritis were the predominant clinical and diagnostic findings, respectively.
- Direct IF is vital for DPGN classification, complementing LM and electron microscopy.
- Integrating IF, LM, and clinical data provides a logical and effective diagnostic pathway for DPGN.
Introduction:
Immunofluorescence (IF) microscopy is an essential tool for the analysis of glomerular diseases. In this study, we studied the significance of the IF technique together with light microscopy (LM) and clinical details in the diagnosis of different types of diffuse proliferative glomerulonephritis (GN). We intended to evaluate the spectrum of Diffuse Proliferative Glomerulonephritis (DPGN) in our institute.
Materials And Methods:
We evaluated a total of 95 kidney biopsies received in the past 10 years. All biopsies were scrutinized by LM and IF techniques. Clinical details were documented in a predesigned form.
Results:
The predominant clinical presentation in this study was nephrotic syndrome (49.4%) followed by systemic lupus erythromatosus with suspected renal involvement (24.2%). On microscopy, lupus nephritis (LN) was the most common DPGN in the study (35.7%), followed by immunoglobulin (Ig) A nephropathy (25.2%) and postinfectious GN (PIGN) (16.8%). The majority of patients were in the <30 years age group (72.6%), with the average age of patients being 24.4 years. The dominant deposit on IF in LN was C3 and IgG (100%). A high deposit of IgA (100%) in IgA nephropathy and of IgG and C3 (100%) in membranoproliferative GN was seen. PIGN showed dominant positive staining of IgG (92.8%).
Conclusion:
The predominant clinical presentation was of nephrotic syndrome and on LM LN was the most commonly diagnosed DPGN in this study. Direct IF is vital for classifying DPGN, followed by electron microscopy, which is an essential tool. This article describes a rational evaluation of kidney biopsies with DPGN pattern on LM in a way that guides toward the logical assessment to reach the diagnosis. Using the IF technique and comparing it with LM and clinical details, we evaluated the spectrum DPGN in our center.
