IgA nephropathy is a chronic disease characterized by the deposition of immunoglobulin A (IgA) in the glomeruli of the kidneys, which leads to their inflammation and damage. It is one of the most common forms of glomerulonephritis, which usually occurs with a changing clinical picture and can cause both mild and severe disease with the possibility of progression to chronic renal failure. The main manifestations of IgA nephropathy include microhematuria, proteinuria, and arterial hypertension. The disease is often diagnosed at a young age and may have an autoimmune component, adversely affecting the quality of life of patients.
History of the disease and interesting historical facts
Literary evidence of IgA nephropathy first appeared in 1968, when Japanese researchers described clinical cases of hematuria and proteinuria associated with IgA deposition in the kidneys. Since then, this disease has attracted the attention of not only clinicians but also scientists, which has allowed us to consistently expand our knowledge of the mechanisms of its development. In the 1970s and 1980s, a number of studies clarified the pathogenesis of the disease, including the role of mutations in genes encoding components of the immune system. Interestingly, prevalence varied in different countries, which also prompted researchers to study the influence of genetic and environmental factors on the course of the disease.
Epidemiology
Statistical studies show that IgA nephropathy occurs on average in 2-3 cases per 100,000 population per year, and among glomerulonephritis diseases, its share is 30%. In different regions of the world, prevalence can vary significantly: in Japan and China, this figure exceeds 50% among patients with glomerulonephritis, while in European countries it is 20-30%. Gender predisposition is also observed: men suffer from the disease 1.5-2 times more often than women. The age of onset of manifestations is most often from 15 to 35 years.
Genetic predisposition to this disease
Studies show that IgA nephropathy has a certain genetic predisposition. The main genes involved are considered to be genes encoding proteins of the immune system, such as HLA-G, HLA-DQ, and others. Mutations in these genes can lead to disturbances in the synthesis and functions of immunoglobulins, which in turn contributes to the deposition of IgA in the kidneys. Considerable attention is also paid to polymorphisms in the genes of cytokines, such as IL-6 and TNF-α, which can affect the inflammatory processes involved in the pathogenesis of the disease.
Risk factors for the development of this disease
Various factors can contribute to the development of IgA nephropathy. These include:
- Infectious diseases (eg, viral and bacterial infections, especially before upper respiratory tract infections);
- Environmental factors (exposure to toxins and chemicals);
- Autoimmune diseases (such as systemic lupus erythematosus);
- Disorders in the renal microcirculation system;
- Hereditary predisposition.
Diagnosis of this disease
Diagnosis of IgA nephropathy is based on a comprehensive assessment of clinical and laboratory data. The main symptoms include:
- Microhematuria (blood in urine);
- Proteinuria (protein in urine);
- Arterial hypertension;
- Symptoms of kidney failure in advanced cases.
Laboratory tests include urinalysis, creatinine and electrolyte levels, and serologic tests to rule out other conditions. Radiologic tests, such as an abdominal ultrasound, may help identify structural changes in the kidneys. In some cases, a kidney biopsy is performed to confirm the diagnosis and determine the extent of damage.
The differential diagnosis of IgA nephropathy must be made with other forms of glomerulonephritis, such as membranous glomerulonephritis and Alport syndrome.
Treatment
Treatment of IgA nephropathy should be individualized and based on the severity of the disease. The main treatment areas include:
- General treatment includes lifestyle changes, blood pressure control, and protein restriction;
- Pharmacological treatment - use of antihypertensive agents (ACE inhibitors, angiotensin receptor blockers), corticosteroids in severe forms;
- Surgical treatment - in some cases, nephrectomy may be required;
- Other treatments - immunosuppressants may be used if standard therapy is ineffective.
List of medications used to treat this disease
Medicines used to treat IgA nephropathy include:
- Lisinopril;
- Losartan;
- Methylprednisolone;
- Cyclosporine;
- Acetylsalicylic acid.
Disease monitoring
Patient monitoring includes regular monitoring of creatinine, urine protein, and blood pressure. General check-ups are performed every 3-6 months, and more frequently if the disease progresses. The prognosis for patients with IgA nephropathy varies: in some patients, the disease may remain stable for many years, while in others, progression to chronic renal failure is possible. Complications may include peripheral edema, hypertensive crises, and progressive renal failure.
Age-related features of the disease
IgA nephropathy can manifest itself at any age, but is most common in young and middle age. In children, the disease usually has a more favorable prognosis and can regress on its own. In older people, IgA nephropathy can be more aggressive, often combined with other pathologies, such as arterial hypertension and diabetes.
Questions and Answers
- What is IgA nephropathy? It is a kidney disease in which immunoglobulin A is deposited in the glomeruli, causing them to become inflamed and can lead to kidney failure.
- What are the main symptoms of the disease? The main symptoms include blood in the urine, protein in the urine and high blood pressure.
- How is IgA nephropathy diagnosed? Diagnosis includes urinalysis, creatinine assessment, ultrasound and, if necessary, kidney biopsy.
- How is IgA nephropathy treated? Treatment includes drug therapy, lifestyle changes, and in some cases surgery.
- What is the prognosis for patients with IgA nephropathy? The prognosis varies; in some patients the disease may stabilize, while in others it may progress to chronic kidney failure.
Advice from Dr. Oleg Korzhikov
Dr. Oleg Korzhikov recommends not to ignore the symptoms of kidney disease and to consult a doctor in a timely manner. It is important to lead a healthy lifestyle, stick to a balanced diet, avoid stress and regularly monitor your blood pressure. If you have a predisposition to kidney disease, it is recommended to undergo regular examinations and, if necessary, receive targeted treatment. It is important to remember that early diagnosis and proper treatment can significantly improve the quality of life of patients and reduce the risk of serious complications.
