Systemic Lupus Erythematosus (SLE/Lupus)
Systemic lupus erythematosus, referred to as SLE or lupus, is sometimes called the “great imitator.” Why? Because of its wide range of symptoms, people often confuse lupus with other health problems. Lupus affects mainly the joints, kidneys and skin. It can range from mild to serious disease. Yet, there is much reason for hope. Improvements in treatment have greatly improved the quality of life of these patients’ and increased their lifespan considerably.
What is lupus?
Lupus is a chronic (long-term) disease that causes inflammation — pain and swelling. It can affect the skin, joints, kidneys, lungs, nervous system and other organs of the body. Most patients feel fatigue and have rashes, arthritis (painful and swollen joints) and fever.
Lupus flares vary from mild to serious. Most patients have times when the disease is active, followed by times when the disease is mostly quiet — referred to as a remission.
What causes lupus?
The immune system is the body’s defense system. When healthy, it protects the body by making antibodies (blood proteins) that attack foreign germs and cancers. With lupus, the immune system misfires. Instead of producing protective antibodies, an autoimmune disease begins and makes “autoantibodies,” which attack the patient’s own tissues. Doctors sometimes refer to this as a “loss of self-tolerance.”
As the attack goes on, other immune cells join the fight. This leads to inflammation and abnormal blood vessels (vasculitis). These antibodies then end up in cells in organs, where they damage those tissues.
Why this inflammatory response begins is not clear. It most likely results from a mix of inherited tendencies and things in your environment. These include viruses, sunlight and drug allergies. People with lupus may also have an impaired process for clearing old and damaged cells from the body, which causes an abnormal immune response.
Who gets lupus?
Most often, lupus starts in people in their 20s and 30s. It occurs 10 times more often in women than in men. The disease is more common in some ethnic groups, mainly blacks and Asians, and tends to be worse in these groups.
How is lupus diagnosed?
Lupus can be hard to detect because it has many symptoms, and they can come on slowly.
People with lupus often have features that are not specific to lupus. These include fever, fatigue, weight loss, blood clots and hair loss in spots or around the hairline. They may also have heartburn, stomach pain, and poor circulation to the fingers and toes. Pregnant women can have miscarriages.
The American College of Rheumatology has a list of symptoms and other measures that doctors can use as a guide to decide if a patient with symptoms has lupus. If your doctor finds that you have at least four of these problems, and finds no other reason for them, you may have lupus:
- Butterfly-shaped rash over the cheeks — referred to as malar rash
- Red rash with raised round or oval patches — known as discoid rash
- Rash on skin exposed to the sun (photosensitivity)
- Mouth sores: sores in the mouth or nose lasting from a few days to more than a month
- Arthritis: tenderness and swelling lasting for a few weeks in two or more joints
- Lung or heart inflammation: swelling of the tissue lining the lungs (referred to as pleurisy or pleuritis) or the heart (pericarditis), which can cause chest pain when breathing deeply
- Kidney problem: blood or protein in the urine, or tests that suggest poor kidney function
- Neurologic problem: fits, strokes or psychosis (a mental health problem)
- Abnormal blood tests:
- Low blood cell counts: anemia, low white blood cells or low platelets
- Positive antinuclear antibody: referred to as ANA are present in nearly all patients with lupus
- Certain antibodies that show an immune system problem: anti-double-strand DNA (called anti-dsDNA), anti-Smith (referred to as anti-Sm) or antiphospholipid antibodies (APLA)
If your doctor suspects you have lupus from your symptoms, you will need a series of blood tests to confirm that you do have the disease. The most important blood screening test measures ANA, but you can have ANA and not have lupus. Therefore, if you have positive ANA, you may need more specific tests to prove the diagnosis. These blood tests include antibodies to anti-dsDNA and anti-Sm.
The presence of antiphospholipid antibodies can help doctors detect lupus. These antibodies signal a raised risk of certain complications such as miscarriage, difficulties with memory, or blood clots that may lead to stroke or lung injury. Doctors also may measure levels of certain complement proteins (a part of the immune system) in the blood, to help detect the disease and follow its progress.
Lupus is a disease that can lead to inflammation in not just the joints and skin but also many other organs. These include the kidneys, the tissue lining the lungs (pleura) and heart (pericardium), and the brain.
How is lupus treated?
Treatment depends on the type of symptoms you have and how serious they are. Patients with muscle or joint pain, fatigue, rashes and other problems that are not dangerous can receive “conservative” treatment. These options include Nonsteroidal anti-inflammatory drugs — referred to as NSAIDs.
Nonsteroidal anti-inflammatory drugs: NSAIDs decrease swelling, pain and fever. These drugs include Ibuprofen and Naproxen. Some of these NSAIDs can cause serious side effects like stomach bleeding or kidney damage. Always check with your doctor before taking any medications that you are taking as ‘over the counter’ (without a prescription) for your lupus.
Antimalarial drugs: Patients with lupus also may receive an antimalarial medication such as Hydroxychloroquine. Though these drugs prevent and treat malaria, they also help relieve some lupus symptoms, such as fatigue, rashes, joint pain or mouth sores. They also may help prevent abnormal blood clotting and have been found to reduce the chances of relapse of the disease.
Corticosteroids and immune suppressants: Patients with serious or life-threatening problems such as kidney inflammation, lung or heart involvement, and central nervous system symptoms need more “aggressive” (stronger) treatment. This may include high-dose corticosteroids such as prednisone and drugs that suppress the immune system (immunosuppressive). These include Azathioprine , Cyclophosphamide , and Cyclosporine . Recently Mycophenolate has been used to treat severe kidney disease in lupus—referred to as lupus nephritis.
Biologics: New treatment options include drugs called biologics that are already approved for treatment of other rheumatic diseases such as rheumatoid arthritis. Examples are Rituximab and Abatacept. These two drugs are not yet approved for treatment of lupus. In 2011, though, the FDA approved a biologic, Belimumab, for treatment of mild to moderate (medium severe) SLE. It is the first new drug approved for lupus since 1955.
Combination treatment: Health care providers may combine a few medications to control lupus and prevent tissue damage. Each treatment has risks and benefits. Most immune-suppressing medications, for instance, may cause major side effects. Side effects of these drugs may include a raised risk of infections as well as nausea, vomiting, hair loss, diarrhea, high blood pressure and osteoporosis (weak bones). Rheumatologists may lower the dose of a drug or stop a medicine because of side effects or when the disease goes into remission. As a result, it is important to receive careful and frequent health exams and lab tests to track your symptoms and change your treatment as needed.
Broader health impact of lupus
Even when it is not active, lupus may cause problems later. Some of these problems can be fatal. One of these problems is atherosclerosis (clogging of the arteries) that may develop in younger women or may be more severe than usual. This problem raises the risk of heart attacks, heart failure and strokes. Thus, it is vital that patients with lupus lower their other risk factors for heart disease, such as smoking, high blood pressure and high cholesterol. It is also important to have as active a lifestyle as possible.
Lupus may also cause kidney disease, which can advance to kidney failure and need dialysis. You can help prevent these serious problems by seeking treatment at the first signs of kidney disease. These signs include:
- High blood pressure
- Swollen feet and hands
- Puffiness around your eyes
- Changes in urination (blood or foam in the urine, going to the bathroom more often at night, or pain or trouble urinating)
Living with lupus
Treatment of lupus has improved, and people with the disease are living longer. But, it is still a chronic disease that can limit activities. Quality of life can suffer because of symptoms like fatigue and joint pain. Furthermore, some people do not respond to some treatments. Also, you may not be able to predict when lupus will flare. Such problems can lead to depression, anger, loss of hope or loss of the will to keep fighting.
The best way to control lupus is to follow these tips.
- Form a support system: A good doctor-patient relationship and support from family and friends can help you cope with this chronic and often unpredictable illness.
- Get involved in your care: Take all medications as your doctor prescribed, and visit your doctor often. Learn as much as you can about lupus and your medications, and what kind of progress to expect.
- Stay active: Exercise helps keep joints flexible and may prevent heart disease and strokes. This does not mean overdoing it. Switch off doing light to moderate exercise with times of rest.
- Avoid excess sun exposure: Sunlight can cause a lupus rash to flare and may even trigger a serious flare of the disease itself. When outdoors on a sunny day, wear protective clothing (long sleeves, a big-brimmed hat) and use lots of sunscreen lotion with a SPF of >30.
Pregnancy: If you are a young woman with lupus and wish to have a baby, carefully plan your pregnancy. With your doctor’s guidance, time your pregnancy for when your lupus activity is low. While pregnant, avoid medications that can harm your baby. These include Cyclophosphamide, Cyclosporine, and Mycophenolate mofetil. If you must take any of these medicines, or your disease is very active, use birth control measures.
Estrogen: Rheumatologists have long been concerned that the female hormone estrogen or treatment with estrogen may cause or worsen lupus. Recent research shows that estrogen therapy can trigger some mild or moderate flares of lupus, but does not cause symptoms to get much worse. Yet, estrogen can raise the risk of blood clots. Thus, you should not take estrogen if your blood tests show antiphospholipid antibodies (meaning you already have a high risk of blood clots).
The best way to control lupus is to get involved in your care. Take all medications as your doctor prescribed, and visit your physician often. Learn as much as you can about lupus and your medications.
Points to remember
Most people with lupus can live normal lives. To prevent serious problems, you should see your rheumatologist often. This lets your doctor keep track of your disease and change your treatment as needed. If you do not live near a rheumatologist, you may need to have your primary care doctor manage your lupus with the help of a rheumatologist.