Rates of positive ANA tests are affected by the prevalence of systemic lupus erythematosus in the population. Specifically, false-positive rates will be higher in populations with a low prevalence of the disease, such as primary care patients. Because of the high false-positive rates at 1:40 dilution, ANA titers should be obtained only in patients who meet specific clinical criteria (discussed in the clinical recommendations section of this article). When ANA titers are measured, laboratories should report ANA levels at both 1:40 and 1:160 dilutions and should supply information on the percentage of normal persons who are positive at each dilution.41
Inflammation of blood vessels (vasculitis) that supply oxygen to tissues can cause isolated injury to a nerve, the skin, or an internal organ. The blood vessels are composed of arteries that pass oxygen-rich blood to the tissues of the body and veins that return oxygen-depleted blood from the tissues to the lungs. Vasculitis is characterized by inflammation with damage to the walls of various blood vessels. The damage blocks the circulation of blood through the vessels and can cause injury to the tissues that are supplied with oxygen by these vessels.
A group of people who review, approve, and monitor the clinical study protocol. Their role is to protect the rights and welfare of human research subjects participating in a study. The group typically includes people with varying backgrounds, including a community member, to make sure that research activities conducted by an organization are completely and adequately reviewed. Also known as an institutional review board (IRB) or ethics committee.
There is a wide range of diets advertised to help you lose weight quickly or control various chronic diseases, such as lupus. Many people claim to be experts in nutrition yet have limited knowledge and offer no protection to the public. You should be wary of unqualified practitioners who may be offering unproven techniques to diagnose and treat nutritional problems.
With variants known as discoid lupus, subacute cutaneous lupus, and systemic lupus erythematosus, lupus is one of several disorders of the immune system considered “autoimmune” in nature. These diseases occur when the immune system malfunctions and turns its infection-defense capabilities against the body, producing antibodies against healthy cells and tissues. These antibodies promote chronic inflammation and can damage organs and tissues. In lupus, these antibodies are known as antinuclear antibodies (ANA) because they target parts of the cell’s nucleus. Experts don’t yet fully understand all of the factors and triggers that cause inflammation and tissue damage in lupus, and research is ongoing.
It can be very scary to receive a lupus diagnosis, have your life disrupted and cause you to become uncertain about the future. The good news is that strides are continually being made in the discovery of better diagnostic tools and more effective medications. With the combination of correct treatment, medication, and living a healthy lifestyle, many people with lupus can look forward to a leading a long and productive life.
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. For more information, see Pregnancy and Rheumatic Disease.
Systemic lupus erythematosus (SLE), also known simply as lupus, is an autoimmune disease in which the body's immune system mistakenly attacks healthy tissue in many parts of the body. Symptoms vary between people and may be mild to severe. Common symptoms include painful and swollen joints, fever, chest pain, hair loss, mouth ulcers, swollen lymph nodes, feeling tired, and a red rash which is most commonly on the face. Often there are periods of illness, called flares, and periods of remission during which there are few symptoms.
The main food to avoid is alfalfa sprouts. Alfalfa is used in cattle feed in many countries and the sprouting shoots of this are sold in some health food stores, but are not included in most packaged salads. Check the label before you buy anything like this to make sure. There have been case reports of alfalfa sprout ingestion causing the onset of SLE. Alfalfa and mung bean sprouts contain high levels of L-canavanine, an amino acid protein that stimulates the immune system.
Today, physicians treat lupus using a wide variety of medicines, ranging in strength from mild to extremely strong. Prescribed medications will usually change during a person’s lifetime with lupus. However, it can take months—sometimes years—before your health care team finds just the right combination of medicines to keep your lupus symptoms under control.
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Please Note: The material on this site is provided for informational purposes only and is not medical advice. Always consult your physician before beginning any diet or exercise program.
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