What Is Lupus?
Lupus is a chronic autoimmune condition in which the immune system attacks the body’s own tissues, causing inflammation and damage. The most common type is systemic lupus erythematosus (SLE).
Lupus can affect many parts of the body. It includes the joints, skin, lungs, kidneys, brain, and blood vessels. Common symptoms include fatigue, fever, skin rashes, hair loss, anemia, color changes in the fingers in cold weather, and joint pain or swelling.
Lupus is not caused by a single specific gene, but it can run in families, and people with lupus often have relatives with other autoimmune diseases.
Is Lupus Hereditary?
Lupus can be linked to genetics, which means it can run in families. But genes are not the only cause. Things in the environment also play an important role in triggering the disease. Scientists have found around 100 small changes in different genes that may be connected to lupus.
Some important genes linked to lupus are IRF5 (interferon regulatory factor 5), NCF2 (neutrophil cytosolic factor 2), PTPN22 (protein tyrosine phosphatase non-receptor type 22), STAT4 (signal transducer and activator of transcription 4), and TREX1 (three prime repair exonuclease 1) and TLR7 (toll-like receptor 7). These genes help control how the immune system works.
One gene called TLR7 is especially important. It helps the body recognize germs like viruses. This gene is found on the X chromosome. If TLR7 becomes too active, it can confuse the body’s own cells for germs. This may cause the immune system to attack healthy tissues, which can lead to lupus. However, scientists are still studying this to understand it better.
Lupus is not caused by just one gene. It is a “polygenic” disease, which means many genes work together to increase the risk. There is also something called epigenetics. This means that lifestyle and environmental factors can change how genes behave, even if the genes themselves do not change.
Most experts agree that genes alone usually do not cause lupus. Other triggers can include certain medicines, stress, infections, injuries, too much sunlight or strong indoor light, heavy physical activity, pregnancy, and childbirth. Usually, lupus develops because of a mix of genetic and environmental factors.
What Are the Risk Factors for Lupus?
The following have the highest risk of developing lupus:
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Genetics: People with a family history of lupus have an increased chance of developing lupus. A study shows that about two percent of kids whose parents have lupus are more likely to develop lupus.
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Gender: Anyone can develop lupus. However, women have an increased chance of getting lupus compared to men. Women are about 9 to 10 times more inclined to get lupus than men.
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Age: Lupus is more commonly diagnosed in the 20s and 30s. However, even children and elderly people can get lupus.
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Race: African-American women are two to three times more prone to lupus than Caucasian women. Even Hispanic, Asian, and Native American women are commonly affected. However, a severe form of lupus is noted in African-American and Hispanic individuals.
What Is the Prevalence of Lupus in Families?
Studies have shown that lupus does tend to run in families. There needs to be more information about the disease's hereditary factor for individuals willing to know if they or their family members are more prone to developing it. The evidence is mostly unreliable, but researchers have discovered some inherited tendencies.
There is no useful method for accurately predicting this condition in specific individuals. The siblings of those individuals with lupus have an increased risk compared to others.
According to studies, siblings of an individual with lupus have about a 20 percent chance of developing lupus later. Approximately five percent of children born to a parent with lupus have the chance of developing this disease.
In families with lupus people, all members have a higher load of lupus-causing genetic factors called alleles than normal people. People with lupus have more alleles than necessary; similarly, it is more likely to pass on to their closest relatives.
A better understanding of the disease-causing genetic loci and their involvement in specific lupus phenotypes is required to predict disease outcomes accurately. The studies regarding the same are ongoing.
Also, the genetic factors that increase the lupus developing risk can increase the risks of other autoimmune diseases. This is why individuals with lupus have a high risk for other autoimmune diseases (autoimmune thyroid disease, rheumatoid arthritis, and others).
What Is the Treatment for Lupus?
There is no cure for lupus, but lupus management will help calm the symptoms. Lupus management mainly aims to prevent flares, treat the presenting symptoms, and reduce organ damage and other problems. Then, lupus management will depend on the patients presenting with illnesses.
Medications Commonly Used for Lupus:
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Nonsteroidal Anti-inflammatory Drugs (NSAIDs) - These drugs help to reduce pain and swelling in the body.
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Corticosteroids - They act by reducing swelling, tenderness, and pain. If taken in high doses, they help to calm the immune system.
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Antimalarial drugs - These drugs not only prevent malaria but also treat skin rashes, joint pain, fatigue, and lung inflammation.
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BLyS-specific Inhibitors - These drugs link the abnormal B cell production found in people with lupus.
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Immunosuppressive Agents - In severe cases of lupus, these medications are recommended. They can cause serious side effects.
Conclusion:
Lupus is a chronic autoimmune disease that runs in families. Genetic research is being conducted to determine the disease's exact link and heredity. There is no cure for this condition. However, the treatment is considerably better than in the past, and in the future, it will be far better still. If you notice symptoms related to lupus, consult a doctor for evaluation and next steps.
Key Takeaways
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Lupus may run in families. But it is caused by a mix of genetic and environmental factors.
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There is no single gene responsible for lupus. Environmental factors (infection, smoking, and medications) can also play a role in lupus incidence.
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While there is no cure for lupus, early diagnosis and proper treatment can help manage symptoms effectively.
