Ulcerative colitis (UC) is a chronic inflammatory bowel disease characterized by damage to the mucous membrane of the colon, mainly in the rectum and sigmoid colon. The pathology can have varying degrees of severity, manifesting itself as both mild symptoms and severe complications. The etiology of ulcerative colitis is still not fully understood, but it is known that the disease is the result of a complex interaction of genetic predisposition, immune mechanisms and environmental factors. The main clinical manifestations include diarrhea with blood and mucus, abdominal pain, as well as general symptoms such as weight loss and weakness. This disease can significantly worsen the quality of life of patients and requires a multifaceted approach to diagnosis and treatment.
History of the disease and interesting historical facts
The history of studying ulcerative colitis goes back more than a hundred years. The first descriptions of intestinal diseases, which were later attributed to ulcerative colitis, appeared in the late 19th century. In 1913, the famous British doctor S.S. Ramsay first described characteristic changes in the mucous membrane of the colon, which were later recognized as specific for ulcerative colitis. Interestingly, in different historical eras, ulcerative colitis was considered various diseases, including dysentery. In the 1920s, thanks to the work of researchers such as D. J. Ronan, it was possible to isolate ulcerative colitis as a separate disease, different from other pathogenesis. Discoveries in the field of immunology in the 20th century also played an important role in understanding the pathogenesis of ulcerative colitis and its relationship with autoimmune processes.
Epidemiology
Ulcerative colitis is most often diagnosed in highly urbanized countries. According to the World Health Organization, the incidence varies depending on the geographical location and ranges from 5 to 100 cases per 100,000 population per year. In particular, the highest rates are observed in Northern Europe and North America. In recent decades, there has also been an increase in the incidence in countries with low incidence rates, which may be due to changes in lifestyle and nutrition of the population. According to studies, more than 60% patients with ulcerative colitis have the first diagnosis of the disease before the age of 30, which indicates its relatively early manifestation at a young age.
Genetic predisposition to this disease
Research shows that ulcerative colitis has a genetic predisposition. Close relatives of patients with ulcerative colitis have a higher risk of developing the disease. Some of the genes that have been linked to an increased risk of ulcerative colitis include the following:
- NLRC4 - affects the immune response and inflammatory reactions.
- IRGM is involved in the regulation of macrophage function and inflammatory processes.
- UNC13D is associated with autoimmune diseases and may influence the development of inflammatory processes in the intestine.
- ATG16L1 - disrupts the autophagy process and may contribute to disruption of the intestinal microflora.
Mutations in these genes may predispose the body to a disrupted immune response to its own microbiota, which significantly contributes to the pathogenesis of ulcerative colitis.
Risk factors for the development of this disease
Ulcerative colitis can develop due to many factors. Physical risk factors include:
- Stress - a psycho-emotional state can exacerbate the exacerbation of disease symptoms.
- Poor diet, especially high in fat and low in fiber.
- The presence of other autoimmune diseases, such as rheumatoid arthritis.
Chemical factors include:
- Smoking - Although smoking was previously thought to worsen ulcerative colitis symptoms, current thinking is that it may promote the disease in smokers or reduce the severity of symptoms.
- Taking nonsteroidal anti-inflammatory drugs (NSAIDs) may lead to an exacerbation of the disease in predisposed individuals.
Other risk factors include:
- Heredity - there is evidence of familial clustering of ulcerative colitis.
- Racial and ethnic groups - Different ethnic groups have different rates of disease.
Diagnosis of this disease
Diagnosis of ulcerative colitis involves different stages, starting with the assessment of clinical symptoms. The main symptoms of the disease include:
- Diarrhea with blood or mucus.
- Abdominal pain and cramps.
- Fatigue and weight loss.
Laboratory tests play an important role. They may include:
- General blood tests (for anemia and inflammation).
- Fecal occult blood test.
- Specific markers such as C-reactive protein (CRP) and Saccharomyces cerevisiae antibodies (ASCA).
Radiological examinations may include:
- Colonoscopy is the main method for visualizing and diagnosing ulcerative colitis, allowing for biopsy.
- X-ray and computed tomography (CT) to rule out other pathologies.
Differential diagnosis is important to exclude other diseases such as Crohn's disease, infectious colitis and collagenous colitis.
Treatment
Treatment of ulcerative colitis involves several approaches. The general approach is as follows:
- Following a diet that includes easily digestible foods.
- Stress management and the use of psychotherapy.
Pharmacological treatment includes:
- Aminosalicylates (5-ASA) – such as mesalazine, which reduce inflammation.
- Glucocorticosteroids - to control exacerbations.
- Immunosuppressants—for example, azathioprine or mercaptopurine.
- Biologics – such as infliximab, for patients with severe disease.
Surgical treatment is indicated in cases where conservative treatment is ineffective or in cases of complications such as perforation or cancer. Surgical resection of the bowel may result in remission.
Other treatments may include probiotics to improve gut flora and physical therapy to correct functional disorders.
List of medications used to treat this disease
- Mesalazine (asipol, cyclazole)
- Azathioprine (Imuraan)
- Methotrexate
- Prednisolone
- Infliximab (Remicade)
- Adalimumab (Golimumab)
- Ustekkinumab
Disease monitoring
Monitoring of ulcerative colitis involves regular follow-up examinations to assess the patient's condition and obtain information about the progress of the disease.
Control stages may include:
- Regular colonoscopies to monitor the condition of the mucous membrane and possible complications.
- Laboratory blood tests to assess inflammatory markers.
The prognosis of ulcerative colitis depends on the clinical severity and response to therapy. In most cases, long-term remission is possible with appropriate treatment. However, ulcerative colitis can cause serious complications such as toxic megacolon, bowel perforation, and colon cancer, highlighting the importance of ongoing surveillance.
Age-related features of the disease
Ulcerative colitis can manifest itself at any age, but the greatest number of cases is observed in people aged 15 to 30 years. In older patients, the disease can have a more severe course with multiple exacerbations and concomitant pathologies, such as diabetes or cardiovascular diseases. In children, ulcerative colitis can lead to delayed growth and development, and also negatively affects the psychoemotional state. Adult patients, as a rule, have more pronounced symptoms and the need for more aggressive therapy than older people.
Questions and Answers
- What are the main symptoms of ulcerative colitis? The main symptoms are diarrhea with blood and mucus, abdominal pain, weight loss and general weakness.
- What causes ulcerative colitis? Ulcerative colitis is a multifactorial disease that can be caused by genetic, immune and environmental factors.
- How is ulcerative colitis diagnosed? Diagnosis involves colonoscopy, laboratory tests for inflammatory markers, blood tests, and X-rays.
- What is the treatment for ulcerative colitis? Treatment includes diet, medication (aminosalicylates, corticosteroids, immunosuppressants) and, in some cases, surgery.
- What are the possible complications of ulcerative colitis? Complications may include toxic megacolon, bowel perforation, and increased risk of colon cancer.
