The kidneys are incredible organs, working nonstop to filter waste from our blood. Inside each kidney are millions of tiny filters called glomeruli. These filters are the front line of defense, making sure our bodies stay balanced and healthy. But sometimes, these filters can become damaged, leading to a host of problems.

 

When the Kidney Filters Face a Challenge: Membranous Nephropathy

 

Let’s start with membranous nephropathy, a condition that’s a common cause of nephrotic syndrome in adults. Imagine your kidney’s filters as a coffee strainer. In membranous nephropathy, something causes the strainer to thicken and develop holes, allowing things that should stay in the coffee pot (like protein) to leak out. This condition is considered an autoimmune disease, which means your body’s own immune system mistakenly attacks healthy cells in the kidney.

The body makes antibodies, which are proteins that usually fight off infections. In membranous nephropathy, these antibodies target a protein in the kidney’s filters, leading to inflammation and thickening of the membrane. This damage results in a large amount of protein spilling into the urine, which is a key symptom of nephrotic syndrome.

For many, the first sign of membranous nephropathy is swelling, especially in the legs and feet. This happens because the loss of protein in the urine causes fluid to leak out of the blood vessels and into the body’s tissues. Other symptoms can include:

  • Foamy urine (from excess protein)
  • Weight gain from fluid retention
  • Fatigue
  • High blood pressure

NephCure Inc. is dedicated to supporting those with membranous nephropathy by funding research into the causes of the disease and helping to develop new treatment options.

 

Infantile Nephrotic Syndrome: A Difficult Start for the Youngest Patients

 

While membranous nephropathy is more common in adults, a form of nephrotic syndrome can affect the youngest among us, in a condition known as infantile nephrotic syndrome. As the name suggests, this is a rare condition that appears in babies, sometimes even in the first few months of life. It can be a very challenging diagnosis for families, and it’s something NephCure Inc. is committed to helping with.

Infantile nephrotic syndrome shares many of the same symptoms as its adult counterpart, but they appear at a very young age. The main signs include:

  • Severe swelling, or edema, in the baby’s body
  • High levels of protein in the urine
  • Low levels of protein in the blood
  • Failure to thrive or gain weight

The causes of infantile nephrotic syndrome are often genetic. For many families, this condition is present at birth, making it a difficult and often overwhelming journey. Finding proper treatment and support is crucial, and that’s where organizations like NephCure Inc. come in. We work to provide resources and connect families with the information and help they need.

 

What Causes IgA Nephropathy? A Look at an Autoimmune Puzzle

 

When we discuss kidney diseases, a question that often comes up is, “What causes IgA nephropathy?” Also known as Berger’s disease, IgA nephropathy is another common cause of kidney problems. Like membranous nephropathy, it is an autoimmune condition, but it involves a different kind of antibody.

IgA, or Immunoglobulin A, is an antibody that plays a big role in fighting infections in our mucous membranes, like those in the gut and airways. For reasons that are not yet fully clear, in people with IgA nephropathy, this antibody becomes abnormally sticky and gets stuck in the kidney’s filters. This buildup of IgaN causes inflammation and damage to the glomeruli.

The exact cause of the disease remains a subject of ongoing research. What we do know is that certain events, like an upper respiratory or gastrointestinal infection, can sometimes trigger a flare-up of IgA nephropathy. This is because the body produces a lot of IgA to fight the infection, and some of it ends up getting trapped in the kidneys.

Key things to know about IgA nephropathy causes:

  • Immune System Misstep: The immune system produces an abnormal form of IgA that doesn’t get cleared properly from the body.
  • Genetic Factors: While it doesn’t always run in families, some genetic markers have been linked to the disease.
  • Infection Triggers: Symptoms can sometimes appear after a cold or other infection as the body’s IgA production ramps up.

NephCure Inc. is at the forefront of research aimed at uncovering the precise causes of IgA nephropathy and developing targeted treatments that can stop the disease in its tracks.

 

Taking Action and Finding Support

 

While each of these conditions—membranous nephropathy, infantile nephrotic syndrome, and IgA nephropathy—has its own unique characteristics, they all have one thing in common: they can lead to significant kidney damage. Early detection and proper medical care are essential for managing these diseases and slowing their progression.

For individuals and families affected by these rare kidney diseases, finding support and staying informed is key. The journey can feel isolating, but you’re not alone. NephCure Inc. was founded by parents of children with rare kidney diseases and has grown into a community of patients, caregivers, and medical professionals all working together to find cures.

We’ve invested millions of dollars in research and have helped push forward dozens of new clinical trials, to create more effective treatments and, ultimately, a cure. We believe that by sharing our stories and coming together, we can empower one another and accelerate the progress of science.

If you or a loved one are facing a diagnosis of a kidney disease, we invite you to explore our resources. Our website is full of information, patient stories, and ways to connect with others who truly understand what you’re going through. Remember, every person’s journey is unique, but the power of community and knowledge can make all the difference.

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Last Update: August 26, 2025