Lupus, also known as Systemic Lupus Erythematosus or SLE, is a complex disease that can be difficult to diagnose. It affects many areas of body including the joints, skin and kidneys. More than 200,000 people in the U.S. are diagnosed with lupus each year. Like other autoimmune diseases, in lupus, cells essentially make the bad decision to attack the body’s own cells.
For some patients whose kidneys or central nervous systems are affected by lupus, a type of drug called an immunosuppressive may be used. Immunosuppressives, such as cyclophosphamide and mycophenolate mofetil, restrain the overactive immune system by blocking the production of immune cells. These drugs may be given by mouth or by IV infusion. The risk for side effects increases with the length of treatment.
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.
An increase in the size of an organ, structure, or the body due to growth rather than tumor formation. This term is generally restricted to an increase in size or bulk that results not from an increase in the number of cells but from an increase in a cellular component, e.g., proteins. It applies to any increase in size as a result of functional activity.
Gene regulation is the process of turning genes on and off. During early development, cells begin to take on specific functions. Gene regulation ensures that the appropriate genes are expressed at the proper times. Gene regulation can also help an organism respond to its environment. Gene regulation is accomplished by a variety of mechanisms including chemically modifying genes and using regulatory proteins to turn genes on or off.
Lupus band test. Microphotograph of a histologic section of human skin prepared for direct immunofluorescence using an anti-IgG antibody. The skin is from a patient with systemic lupus erythematosus and shows IgG deposit at 2 different places: the first is a band-like deposit along the epidermal basement membrane ("lupus band test" is positive); the second is within the nuclei of the epidermal cells (anti-nuclear antibodies).
Mixed connective tissue disease (MCTD) is a autoimmune disorder that causes overlapping features of three connective tissue disorders: lupus, scleroderma, and polymyositis. MCTD may also have features of rheumatoid arthritis. This condition is most often diagnosed in women in their 20’s and 30’s. Occasionally, children are affected. At this time the cause of this condition is unknown.
ANA screening yields positive results in many connective tissue disorders and other autoimmune diseases, and may occur in normal individuals. Subtypes of antinuclear antibodies include anti-Smith and anti-double stranded DNA (dsDNA) antibodies (which are linked to SLE) and anti-histone antibodies (which are linked to drug-induced lupus). Anti-dsDNA antibodies are highly specific for SLE; they are present in 70% of cases, whereas they appear in only 0.5% of people without SLE. The anti-dsDNA antibody titers also tend to reflect disease activity, although not in all cases. Other ANA that may occur in people with SLE are anti-U1 RNP (which also appears in systemic sclerosis and mixed connective tissue disease), SS-A (or anti-Ro) and SS-B (or anti-La; both of which are more common in Sjögren's syndrome). SS-A and SS-B confer a specific risk for heart conduction block in neonatal lupus.
“It’s always difficult for children and parents to live with the idea that lupus is chronic,” says Pascual. That means the child has many more years worth of living with the condition than if he or she were diagnosed later in life. And because this disease is lifelong and may involve complications such as nephritis, doctors need to manage it aggressively.
Research has demonstrated evidence that a key enzyme's failure to dispose of dying cells may contribute the development of systemic lupus erythematosus. The enzyme, DNase1, normally eliminates what is called "garbage DNA" and other cellular debris by chopping them into tiny fragments for easier disposal. Researchers turned off the DNase1 gene in mice. The mice appeared healthy at birth, but after six to eight months, the majority of mice without DNase1 showed signs of systemic lupus erythematosus. Thus, a genetic mutation in a gene that could disrupt the body's cellular waste disposal may be involved in the initiation of systemic lupus erythematosus.
Lupus is chronic, complex, and difficult to diagnose. No single lab test can tell if you have lupus. Many lupus symptoms imitate symptoms of other diseases and often come and go. Your primary care doctor or rheumatologist will use your medical history, a physical exam, and many routine as well as special tests to rule out other diseases. Many physicians also use the American College of Rheumatology's "Eleven Criteria of Lupus" to aid in the diagnosis of lupus. The criteria include symptoms as well as specific laboratory findings that provide information about the functioning of a person's immune system. In most cases, the diagnosis of lupus is made when four or more of the criteria have occurred at some time.
Some patients with mild lupus, with a little joint pain or rash can be managed with anti-inflammatory drugs such as nonsteroidal anti-inflammatory drugs, or NSAIDs, such as ibuprofen or naproxen, says Stuart D. Kaplan, MD, the chief of rheumatology at South Nassau Communities Hospital in Oceanside, New York. These drugs can also help manage fever and inflammation of the heart and lining around the lungs. (2)
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