IgA nephropathy is a chronic kidney disease in which the immune system damages the kidneys’ filters. Doctors also call it Berger’s disease. It is one of the most common causes of inflammation in the filtering units of the kidney, and it can slowly lead to kidney failure in some patients.

Many people have no symptoms for years. Others notice blood in the urine, often after an infection. Researchers continue to study why the disease starts and why it progresses so differently from one patient to another.

Our high-quality IgA Nephropathy Samples, along with Human Blood Samples, Human Serum Samples, Human Plasma Samples, and other biological materials, support researchers who study IgA nephropathy and its underlying disease mechanisms.

Understanding IgA Nephropathy

IgA nephropathy is an immune-mediated disease. 

Immunoglobulin A is an antibody that normally protects the lining of the gut and airways. In this disease, an abnormal form of IgA builds up in the glomeruli, which are the tiny filters inside the kidneys.

These deposits trigger inflammation and damage the filters. This causes blood in the urine and protein loss in the urine, and over time the kidneys can lose function.

Moreover, the disease does not look the same in every patient. 

Some people have mild changes that stay stable for decades, while others lose kidney function steadily. 

This diversity is one reason researchers need access to well-characterized IgA Nephropathy Biospecimens that represent different clinical and biological profiles.

Signs and Symptoms of IgA Nephropathy

Many patients have no symptoms in the early stages, and doctors often find the disease by chance during a urine test. 

When symptoms appear, patients may experience:

The presence and severity of these symptoms vary between individuals.

Causes of IgA Nephropathy

The exact cause of IgA nephropathy is not fully understood, but researchers describe it as a process with several linked steps. 

First, the body makes an abnormal form of IgA that lacks some of its normal sugar molecules. 

The immune system then recognizes this IgA as foreign and produces antibodies against it. 

These antibodies and abnormal IgA join together and form immune complexes, which travel through the bloodstream and settle in the filters of the kidneys, where they trigger inflammation.

Genetic factors contribute to this process. The disease sometimes runs in families, and researchers have linked many gene variants to a higher risk. However, genes alone do not explain the disease, and most patients have no clear family history.

Environmental triggers also matter. Because IgA protects the gut and airways, the immune response in these areas appears to play a role. 

In addition, doctors have linked IgA nephropathy with other conditions, such as celiac disease and liver disease.

Diagnosis of IgA Nephropathy

Doctors usually first suspect IgA nephropathy when a urine test shows blood or protein. They confirm these findings with repeat tests and measure the amount of protein lost in the urine over time.  They also check blood pressure, because kidney disease often raises it. Laboratory testing helps doctors judge kidney function. 

Similarly, a blood test measures creatinine, and doctors use it to calculate how well the kidneys filter waste. 

Doctors also rule out other kidney diseases that can look similar, such as lupus nephritis.

A kidney biopsy is the step that confirms the diagnosis. A pathologist examines a small piece of kidney tissue under a microscope and uses special staining to look for IgA deposits in the glomeruli. The pathologist also scores the amount of scarring and inflammation, and this helps doctors estimate the risk of progression.

Treatment of IgA Nephropathy

There is currently no cure for IgA nephropathy, so treatment focuses on protecting the kidneys and slowing disease progression. 

Supportive care comes first for most patients. 

Doctors prescribe blood pressure medicines that also reduce protein loss in the urine, and they usually choose drugs that act on the hormone system that controls pressure in the filters of the kidney. 

Patients also benefit from a low-salt diet, regular exercise, and avoiding smoking. 

Moreover, newer medicines that lower protein loss in the urine and protect kidney function can also help some patients.

When protein loss stays high despite supportive care, doctors may add medicines that calm the immune system. Corticosteroids are one option, and doctors weigh their benefits against their side effects. Newer targeted treatments act on the part of the immune system that produces abnormal IgA, and some are designed to work in the gut.

If kidney function falls to a very low level, patients may need dialysis or a kidney transplant. 

Researchers use patient samples to understand why some patients respond to treatment while others continue to lose kidney function.

IgA Nephropathy Blood Samples

IgA Nephropathy Blood Samples provide a practical source of patient-derived material for studying systemic immune activity. Depending on the study design, blood samples may be used to investigate:

  • Abnormal IgA levels
  • Immune-cell populations
  • Inflammatory mediators
  • Cytokines and chemokines
  • Circulating proteins
  • Molecular biomarkers

IgA Nephropathy Serum Samples

IgA Nephropathy Serum Samples are widely relevant to kidney biomarker research because Human Serum Samples contain antibodies, proteins, cytokines, and other circulating molecules. Serum can support research examining:

  • IgA and immune-complex profiles
  • Autoantibodies against abnormal IgA
  • Inflammatory proteins
  • Cytokines and chemokines
  • Potential diagnostic or prognostic biomarkers
  • Differences between disease stages

IgA Nephropathy Plasma Samples

IgA Nephropathy Plasma Samples provide another valuable source for investigating circulating biological markers. Researchers use Human Plasma Samples to study proteins, nucleic acids, cytokines, immune mediators, extracellular vesicles, and other analytes. 

IgA Nephropathy Tissue Samples

IgA Nephropathy Tissue Samples let researchers study the kidney itself. They can examine IgA deposits, the structure of the filters, scarring, and immune-cell infiltration. Researchers often use FFPE tissue for staining and structure, and fresh frozen tissue for molecular analysis.

Kidney Disease Samples

Kidney Disease Samples support research across different causes of kidney damage. Researchers can compare IgA nephropathy with other causes of long-term kidney injury and look for shared and disease-specific biology.

Renal Disease Samples

Renal Disease Samples help researchers study how kidney function declines and how it relates to markers in blood and tissue. They also support work on late-stage disease and kidney failure. 

Research Applications of IgA Nephropathy Samples

Researchers can use IgA Nephropathy Samples across several areas of nephrology and 

immunology research such as: 

  • Biomarker Discovery
  • Immune Profiling
  • Kidney Tissue Research
  • Drug Response Studies

Frequently Asked Questions

Can IgA nephropathy samples be compared with other kidney diseases?

Yes. Researchers often compare IgA Nephropathy Biospecimens with Glomerular Disease Samples and Kidney Disease Samples to find shared and disease-specific biological features.

Are research samples ethically sourced?

Yes. All biospecimens available on our website are sourced with ethical guidelines in mind.

Can researchers use healthy donor samples as controls?

Yes. Researchers can compare IgA Nephropathy Samples with normal healthy donor samples to identify differences in antibody profiles, inflammatory markers, and protein signatures.

Supporting Your Research with Bay Biosciences

At Bay Biosciences, we provide human biospecimens to pharmaceutical companies, biotechnology organizations, academic institutions, and diagnostic developers. Our comprehensive range of samples includes: 

If you have any questions, concerns, or special requests, please don’t hesitate to contact us. 

Our team is always happy to help!