Renal dysfunction happens when your kidneys have trouble maintaining the balance of water, waste, and other chemicals in your body. Renal dysfunction is sometimes known as kidney failure, renal failure, or kidney injury.
Kidney failure can be chronic (occur over a long period of time) or acute (for a short period). High blood pressure — also known as hypertension — and diabetes mellitus cause two-thirds of chronic kidney disease cases. The remaining one-third of people with kidney disease develop it from various other conditions. More than 150 rare disorders cause renal dysfunction and kidney failure.
This article will highlight some of the causes of renal dysfunction and their prevalence to help you better understand what — beyond diabetes or high blood pressure — may lead to kidney failure.
Some types of kidney disease can run in families. Most of the rare types of kidney disease are inherited (passed down) from parents or previous generations.
Inherited kidney diseases are caused by a harmful change (also known as a mutation) in your DNA (genetic code). You can inherit a mutation in three ways:
Genetic tests can look for these genetic mutations to help diagnose or rule out certain conditions. People with a family history of inherited kidney disease can also find out their chances of passing on kidney disease to their children.
There are more than 60 types of inherited kidney diseases — we’ll review a few of the most common types.
Polycystic kidney disease is the fourth leading cause of kidney failure, causing about 5 percent of all cases, according to the National Kidney Foundation.
People with polycystic kidney disease develop fluid-filled cysts in their kidneys. If the cysts are too big or numerous, they can cause impaired renal function.
When polycystic kidney disease develops early in life, it is usually caused by recessive inheritance. This condition has a very aggressive disease progression and is usually fatal in the first few months of life. However, most people with polycystic kidney disease acquire it through dominant inheritance.
People with Alport syndrome have a mutation in a connective tissue protein called collagen. The mutated collagen protein can damage the small blood vessels and glomeruli (filtering unit in the kidney), leading to kidney impairment.
Alport syndrome is rare. It can occur via dominant, recessive, or sex-linked inheritance.
Fabry disease is caused by a mutation in a protein called alpha-galactosidase A (alpha GAL), which helps break down certain fats. Without alpha GAL, fats can accumulate throughout the body, including the kidneys. The protein buildup makes it harder for the kidneys to do their job properly.
Fabry disease is rare and has a sex-linked inheritance. It is more common and more severe in biological males.
People with cystinosis have a mutation in a protein involved with storing the amino acid cysteine. The result is an abnormal cysteine buildup, which can cause damaging crystals to form in the kidney.
Cystinosis is rare and caused by a recessive gene.
People with some types of autoimmune diseases can experience kidney damage and renal dysfunction when the immune system mistakenly attacks the kidneys. Kidney damage from autoimmune disease is typically due to inflammation that damages the small blood vessels and glomeruli.
Renal dysfunction can result from several types of autoimmune diseases, such as those discussed below.
Up to 40 percent of people with lupus will have kidney involvement, also known as lupus nephritis. Lupus is an autoimmune disease that causes the immune system to attack healthy parts of the body such as the kidneys, skin, joints, heart, lungs, or brain.
Immunoglobulin A (IgA) nephropathy, also known as Berger’s disease, can occur when an immune protein called IgA gets deposited in the kidneys. When IgA builds up, it can cause inflammation. Over time, the inflammation can cause permanent kidney damage.
Complement 3 glomerulopathy (C3G) is a rare disease that occurs when complement proteins from the immune system damage the glomeruli in the kidney. Complement proteins help your immune system fight off infections. If complement proteins are inappropriately activated or can’t be broken down properly, they can get stuck in the kidney and cause inflammation.
Goodpasture’s syndrome happens when a person’s immune system mistakenly makes antibodies that attack the lining of the kidney and lungs. The antibodies cause damaging inflammation in these organs.
Most medications pass through your kidneys, but some drugs can harm these organs when taken in large amounts. Medications that are harmful to your kidneys are known as nephrotoxic.
People with cardiovascular disease, diabetes, sepsis, and previous exposure to contrast dye have an increased risk of kidney damage caused by medications.
Medication side effects can cause kidney damage in different ways, such as by:
Types of medication that can cause renal dysfunction include:
Repeated or chronic kidney infections — also known as pyelonephritis — can permanently damage kidneys by causing inflammation. Bacteria is the most common cause of pyelonephritis, but many of the antibiotics used to treat kidney infections also have a risk of causing kidney damage.
Viruses such as SARS-CoV-2, which causes COVID-19, can lead to kidney damage through inflammation — causing blood clots — or directly targeting kidney cells. Even mild cases of COVID-19 can increase the risk of kidney damage.
Kidney cancer, such as renal cell carcinoma, can lead to kidney failure. Cancer occurs when cells begin to grow out of control. Cancer cells can’t function as well as healthy kidney cells, and as cancer grows in the kidneys, kidney function decreases. Additionally, many chemotherapy drugs used to treat cancer bring a risk of kidney damage.
Risk factors for kidney cancer include:
You can’t always prevent renal dysfunction, but you can lower your risk with healthy steps like these:
If you have diabetes or high blood pressure, work with your health care team to keep these conditions well controlled by attending all follow-up visits. Talk to your nephrology specialist about your risk of renal dysfunction and what you can do to prevent it.
At MyKidneyDiseaseCenter, the site for people with kidney disease and their loved ones, people come together to gain a new understanding of kidney disease and share their stories with others who understand life with kidney disease.
Have you been diagnosed with any of these kidney conditions? Have you discussed your risk of renal dysfunction with your doctor? Share your experience in the comments below.
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