Fever in patients with systemic lupus erythematosus (SLE) is grounds for hospital admission because of the difficulty of distinguishing a disease flare from infection in these immunocompromised hosts. Patients with SLE are often complement deficient and functionally asplenic; therefore, they are at particular risk for infections with encapsulated organisms. For example, meningococcemia in young females with lupus may be catastrophic.
Proteinuria (also called albuminuria or urine albumin) is a condition in which urine contains an abnormal amount of protein. Albumin is the main protein in the blood. Proteins are the building blocks for all body parts, including muscles, bones, hair, and nails. Proteins in the blood also perform a number of important functions. They protect the body from infection, help blood clot, and keep the right amount of fluid circulating throughout the body.
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
Since other diseases and conditions appear similar to lupus, adherence to classification can greatly contribute to an accurate diagnosis. However, the absence of four of these criteria does not necessarily exclude the possibility of lupus. When a physician makes the diagnosis of SLE, s/he must exclude the possibility of conditions with comparable symptoms, including rheumatoid arthritis, systemic sclerosis (scleroderma), vasculitis, dermatomyositis and arthritis caused by a drug or virus.
Describes a clinical study in which groups of participants receive one of several combinations of interventions. For example, a two-by-two factorial design involves four groups of participants. Each group receives one of the following pairs of interventions: 1) drug A and drug B, 2) drug A and a placebo, 3) a placebo and drug B, or 4) a placebo and a placebo. So during the trial, all possible combinations of the two drugs (A and B) and placebos are given to different groups of participants.
Aggrecan is a type of protein known as a proteoglycan, which means it has several sugar molecules attached to it. It is the most abundant proteoglycan in cartilage, a tough, flexible tissue that makes up much of the skeleton during early development. Most cartilage is later converted to bone (a process called ossification), except for the cartilage that continues to cover and protect the ends of bones and is present in the nose, airways, and external ears. Aggrecan attaches to the other components of cartilage, organizing the network of molecules that gives cartilage its strength. These interactions occur at a specific region of the aggrecan protein called the C-type lectin domain (CLD). Because of the attached sugars, aggrecan attracts water molecules and gives cartilage its gel-like structure. This feature enables the cartilage to resist compression, protecting bones and joints. Although its role is unclear, aggrecan affects bone development.
The severity of lupus varies from mild to life threatening. Kidney problems and neurologic complications are more dangerous than the rashes, arthritis or other symptoms. After many years of having lupus, patients may develop hypertension (high blood pressure), accelerated atherosclerosis (plaque and fat build-up in the arteries), heart and lung diseases, kidney failure or osteoporosis. With proper treatment, the majority of people diagnosed with lupus have a normal life expectancy, but many will experience disabilities. Each patient will likely have his or her own specific pattern of symptoms and flares, but the disease can change over time.
If you or a loved one has been diagnosed with the autoimmune disease systemic lupus erythematosus or any of the less common subtypes of lupus, you may be wondering about available treatment options and which ones may be right for you. Because lupus is a chronic disease, doctors work with you to manage symptoms — which can range from mild arthritis and rash to problems with the kidneys and other organs — using a variety of medications and therapies. And the best treatment approach for you might change over time as your symptoms and the condition changes.
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