Photosensitive systemic lupus erythematosus (SLE) rashes typically occur on the face or extremities, which are sun-exposed regions. Although the interphalangeal spaces are affected, the metacarpophalangeal (MCP) and proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints are spared. Photo courtesy of Dr. Erik Stratman, Marshfield Clinic.
Autoantibodies directed against various nuclear antigens including DAutoantibodies directed against various nuclear antigens including DNA, RNA, histones, acidic nuclear proteins, or complexes of these molecular elements. Antinuclear antibodies are found in systemic autoimmune diseases including systemic lupus erythematosus, Sjogren’s syndrome, scleroderma, polymyositis, and mixed connective tissue disease. Autoantibodies directed against various nuclear antigens including DNA, RNA, histones, acidic nuclear proteins, or complexes of these molecular elements. Antinuclear antibodies are found in systemic autoimmune diseases including systemic lupus erythematosus, Sjogren’s syndrome, scleroderma, polymyositis, and mixed connective tissue disease.
A diet high in folic acid, such as found in leafy green vegetables, fruits, and fortified breads and cereals, or a folic acid supplement is important if you are taking methotrexate (Rheumatrex). For nausea caused by medications, eat small frequent meals and foods that are easy to digest. Try dry cereals, breads, and crackers. Also avoid greasy, spicy, and acidic foods.
Immunoglobulins are formed by light and heavy (depending on molecular weight) chains of polypeptides made up of about 100 amino acids. These chains determine the structure of antigen-binding sites and, therefore, the specificity of the antibody to one antigen. The five types of immunoglobulins (IgA, IgD, IgE, IgG, IgM) account for approximately 30% of all plasma proteins. Antibodies are one of the three classes of globulins (plasma proteins) in the blood that contribute to maintaining colloidal oncotic pressure.
Heart and Lungs. Heart and lung involvement often is caused by inflammation of the covering of the heart (pericardium) and lungs (pleura). When these structures become inflamed, patients may develop chest pain, irregular heartbeat, and accumulation of fluid around the lungs (pleuritis or pleurisy) and heart (pericarditis). The heart valves and the lung itself can also be affected by lupus, resulting in shortness of breath.
However, the mainstays of treatment are corticosteroids such as prednisone (Deltasone), hydrocortisone, methylprednisolone (Medrol), and dexamethasone (Decadron, Hexadrol). These drugs heavily suppress inflammation but can cause short-term side effects including swelling, increased appetite, and weight gain and long-term side effects including stretch marks on the skin, weakened or damaged bones, high blood pressure, damage to the arteries, diabetes, infections, and cataracts.
Hormonal mechanisms could explain the increased incidence of SLE in females. The onset of SLE could be attributed to the elevated hydroxylation of estrogen and the abnormally decreased levels of androgens in females. In addition, differences in GnRH signalling have also shown to contribute to the onset of SLE. While females are more likely to relapse than males, the intensity of these relapses is the same for both sexes.
Dermatomyositis. Acute onset of confluent macular erythema in a periorbital and malar distribution (involving the cheeks and extending over the nasal bridge), with extension to the chin in a female with juvenile dermatomyositis. Note the perioral sparing. In some patients, there may be more extensive involvement of the face, including the perioral region, forehead, lateral face, and ears. In contrast to SLE , in dermatomyositis with malar erythema, the nasolabial folds are often not spared.
In one study41 that used patients with connective tissue diseases as the control group, the revised ACR diagnostic criteria for systemic lupus erythematosus were found to have an overall sensitivity of 96 percent and a specificity of 96 percent. Other studies21,32,43 have reported sensitivities ranging from 78 to 96 percent and specificities ranging from 89 to 100 percent. The ACR criteria may be less accurate in patients with mild disease.21
Immunosuppressive agents/chemotherapy. In advanced cases of lupus, drugs like azathioprine, methotrexate and cyclophosphamide might be used to suppress the immune system. These types of therapies can help prevent organ damage; however, they do cause severe side effects as well as infertility in women. People on immunosuppressive therapies must be closely monitored by a doctor.
Mortality rates for systemic lupus erythematosus are particularly high in children. In a retrospective study26 of Brazilian children, overall mortality during 16 years of follow-up was 24 percent. Death occurred because of infection (58 percent), central nervous system disease (36 percent), and renal disease (7 percent). When disease onset was before the age of 15 years, renal involvement and hypertension predicted mortality.
Antibodies produced by a single clone of cells; A type of protein made in the laboratory that can bind to substances in the body, including cancer cells. There are many kinds of monoclonal antibodies. A monoclonal antibody is made so that it binds to only one substance. Monoclonal antibodies are being used to treat some types of cancer. They can be used alone or to carry drugs, toxins, or radioactive substances directly to cancer cells.
Because the symptoms of lupus can mimic so many other health problems, you may need patience while waiting for a diagnosis. Your doctor must rule out a number of other illnesses before diagnosing lupus. You may need to see a number of specialists such as doctors who treat kidney problems (nephrologists), blood disorders (hematologists) or nervous system disorders (neurologists) depending on your symptoms to help with diagnosis and treatment.
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