What causes lupus erythematosus?

Written by Zhang Lin
Rheumatology and Immunology Nephrology
Updated on September 06, 2024
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The cause of lupus erythematosus is not yet very clear. It is generally believed that the disease is caused by a combination of factors including genetics, environment, estrogen levels, and drugs, leading to immune disorder and consequently the onset of this disease. Studies have found that factors directly related to the onset of lupus erythematosus include ultraviolet rays causing apoptosis of epidermal cells, exposure of new antigens becoming autoantigens, and infections; Other possible related factors include drugs such as hydralazine and isoniazid, as well as food dyes, hair dyes, celery, figs, mushrooms, smoked foods, psychological stress, etc.; it may also be related to factors such as tobacco, vinyl chloride, asbestos, and vaccinations.

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Written by Zhang Lin
Rheumatology and Immunology Nephrology
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Lupus is what disease?

Lupus erythematosus, also known as systemic lupus erythematosus, is a chronic autoimmune disease involving multiple systems and organs. Patients' serum contains various autoantibodies, with the main pathological changes being inflammatory reactions and vascular abnormalities. Most patients exhibit butterfly-shaped erythema on the bridge of the nose and cheeks, which is the most characteristic manifestation of lupus erythematosus. The clinical presentations of systemic lupus erythematosus are diverse, generally characterized by the "four multiples": involvement of multiple systems, multiple organs, multiple autoantibodies, and a higher prevalence among women of childbearing age. Without proper and effective treatment, the mortality rate is high, with the main causes of death being infections, renal failure, and damage to the central nervous system.

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Written by Zhang Lin
Rheumatology and Immunology Nephrology
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Can lupus be inherited?

Lupus erythematosus is not a genetic disease, but it is a disease with a genetic predisposition. This means that genetic diseases refer to monogenic diseases, including albinism, color blindness, etc., which are determined by a pair of alleles. However, lupus erythematosus is a disease with a genetic predisposition, determined by multiple genes. Although lupus erythematosus is not a genetic disease, if your parents have lupus erythematosus, the chance of the next generation developing lupus erythematosus is about 1% to 16%. This relationship is especially significant between mothers and daughters, and among sisters. Genetic factors account for approximately 20% of the importance in the development of lupus erythematosus. Only the combination of genetic factors and environmental factors together can lead to the occurrence of lupus erythematosus.

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Written by Liu Li Ning
Rheumatology
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What is lupus and is it serious?

Lupus erythematosus is an autoimmune disease, which can be very severe in some cases and mild in others. For example, cutaneous lupus erythematosus generally does not involve major organs and usually presents with mild symptoms, primarily affecting the skin and mucous membranes. However, systemic lupus erythematosus can affect significant organs like the kidneys and heart in many patients, often leading to severe medical conditions. Especially, patients with rapidly progressive glomerulonephritis and those with coronary atherosclerotic heart disease tend to have a higher mortality rate. If systemic lupus erythematosus is diagnosed, it is crucial to receive standardized treatment early. Typically, treatment involves long-term maintenance with corticosteroids and immunosuppressants to control the progression of the disease and reduce the likelihood of mortality.

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Written by Liu Li Ning
Rheumatology
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Symptoms of lupus cerebritis

Symptoms of lupus cerebritis can range from mild to severe. Mild symptoms include migraines, personality changes, memory loss, or mild cognitive impairment. Severe cases may present with cerebrovascular accidents, coma, status epilepticus, and other central nervous system symptoms, including aseptic meningitis, cerebrovascular disease, demyelinating syndrome, headaches, movement disorders, spinal cord disease, epileptic seizures, acute mental confusion, anxiety, cognitive impairment, mood disturbances, and psychiatric disorders. Peripheral nervous system manifestations include Guillain-Barre syndrome, autonomic dysfunction, mononeuritis, myasthenia gravis, cranial nerve disorders, nerve plexus disorders, and polyneuritis.

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Written by Liu Li Ning
Rheumatology
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Can women with lupus erythematosus have sexual intercourse?

Women with lupus can engage in sexual activity. Sexual activity itself does not affect systemic lupus erythematosus, but it is essential to use contraception. It is recommended to use condoms for contraception. The use of contraceptive pills or withdrawal method is generally not recommended. This is because, in case of an unplanned pregnancy, there could be a risk of triggering a flare-up of the disease. Moreover, the risk of miscarriage or embryonic developmental arrest in pregnant women with lupus is much higher than in healthy individuals. If there are plans for pregnancy, it should only be considered after the disease has been stable for more than six months. During pregnancy, it is crucial to follow medical advice strictly regarding medication and to regularly undergo prenatal screening.