An antibody, produced by B cells in response to an altered autoantigen on one type of the body’s own cells, that attacks and destroys these cells. Autoantibodies are the basis for autoimmune diseases such as rheumatoid arthritis and diabetes mellitus. Several theories exist about why autoantibodies are formed. The most common theory proposes that AAbs develop as the result of a combination of hereditary and environmental risk factors that cause an autoantigen to be falsely recognized as alien by B cells; as a result, antibodies are produced for its destruction.
The most commonly sought medical attention is for joint pain, with the small joints of the hand and wrist usually affected, although all joints are at risk. More than 90 percent of those affected will experience joint or muscle pain at some time during the course of their illness.[16] Unlike rheumatoid arthritis, lupus arthritis is less disabling and usually does not cause severe destruction of the joints. Fewer than ten percent of people with lupus arthritis will develop deformities of the hands and feet.[16] People with SLE are at particular risk of developing osteoarticular tuberculosis.[17]
Lupus can affect men and women of any race or age. One in 2,000 people in the United States has lupus. People of African, Asian and Native American descent are more likely to develop lupus than are Caucasians. In addition, the disease develops in Emiratis at an earlier stage compared to Asians and expatriate Arabs working in UEA. Lupus studies also show racial preferences, being more prevalent among Arabs than Asians in the UAE region.
Corticosteroids are more potent than NSAIDs in reducing inflammation and restoring function when the disease is active. Corticosteroids are particularly helpful when internal organs are affected. Corticosteroids can be given by mouth, injected directly into the joints and other tissues, or administered intravenously. Unfortunately, corticosteroids have serious side effects when given in high doses over prolonged periods, and the doctor will try to monitor the activity of the disease in order to use the lowest doses that are safe. Side effects of corticosteroids include weight gain, thinning of the bones and skin, infection, diabetes, facial puffiness, cataracts, and death (necrosis) of the tissues in large joints.
As many as 70% of people with lupus have some skin symptoms. The three main categories of lesions are chronic cutaneous (discoid) lupus, subacute cutaneous lupus, and acute cutaneous lupus. People with discoid lupus may exhibit thick, red scaly patches on the skin. Similarly, subacute cutaneous lupus manifests as red, scaly patches of skin but with distinct edges. Acute cutaneous lupus manifests as a rash. Some have the classic malar rash (or butterfly rash) associated with the disease.[13] This rash occurs in 30 to 60% of people with SLE.[14]
Analgesics, or pain relievers, are medicines that reduce or relieve headaches, sore muscles, arthritis, or other aches and pains. There are many different pain medicines, and each one has advantages and risks. Some types of pain respond better to certain medicines than others. Each person may also have a slightly different response to a pain reliever.
Useful medication for the disease was first found in 1894, when quinine was first reported as an effective therapy. Four years later, the use of salicylates in conjunction with quinine was noted to be of still greater benefit. This was the best available treatment until the middle of the twentieth century, when Hench discovered the efficacy of corticosteroids in the treatment of SLE.[121]
A. A healthy, young patient of mine once asked me what the chances were that she might one day develop a "terrible disease." When I asked her what she meant by "terrible disease," she surprised me: she didn't say a disease that could be fatal, but rather a disease that could attack every part of her body. By that definition, systemic lupus erythematosus (lupus for short) is, indeed, a terrible disease.
The ACR recommends ANA testing in patients who have two or more unexplained signs or symptoms listed in Table 2.2,20,21 [Reference2—Evidence level C, consensus/expert guidelines] Because of the high rate of false positive ANA titers, testing for systemic lupus erythematosus with an ANA titer or other autoantibody test is not indicated in patients with isolated myalgias or arthralgias in the absence of these specific clinical signs.45 Under most circumstances, a persistently negative ANA titer (less than 1:40) can be assumed to rule out systemic lupus erythematosus.41
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.

Limited evidence suggests that supplementation may be clinically beneficial in SLE patients with low levels of vitamin D. In Mediterranean patients,  female patients who were not receiving supplemental vitamin D showed more fatigue and received more oral corticosteroids than those with normal levels of vitamin D. [109] In Australian patients, an increase in serum vitamin D levels was associated with reduced disease activity over time. [152]
The principal immunoglobulin in human serum. Because IgG moves across the placental barrier, it is important in producing immunity in the infant before birth. It is the major antibody for antitoxins, viruses, and bacteria. It also activates complement and serves as an opsonin. As gamma globulin, IgG may be given to provide temporary resistance to hepatitis or other disease.

In the absence of systemic lupus erythematosus, the most common reason for a positive ANA test is the presence of another connective tissue disease. Diseases that often are associated with a positive ANA test include Sjögren's syndrome (68 percent of affected patients), scleroderma (40 to 75 percent), rheumatoid arthritis (25 to 50 percent), and juvenile rheumatoid arthritis (16 percent).20 An ANA test also can be positive in patients with fibromyalgia. In patients with diseases other than systemic lupus erythematosus, ANA titers usually are lower, and the immunofluorescent pattern is different.20
Inflammation of the kidneys caused by an autoimmune disease called systemic lupus erythematosus. The condition can cause hematuria and proteinuria, and it may progress to end-stage renal disease. The most severe form of lupus nephritis, called diffuse proliferative nephritis, can cause scars to form in the kidneys. Scars are permanent, and kidney function often declines as more scars form. Early diagnosis and treatment may help prevent long-lasting damage.
Genome-wide association studies (GWAS) revealed regions of linkage that were found on most chromosomes.[52] These studies are useful in identifying the genes that may be responsible for complex diseases such as SLE. Candidate gene loci implicated with SLE include multiple alleles from the HLA region, Fc-gamma receptor, and complement component system.[50] However, association does not prove that a specific form of a gene is responsible for the disease, as there may be other polymorphisms in the region that have a greater association effect.[50] However, because the biological role of most genes are not completely understood, it can be difficult to attribute phenotypic traits to certain genetic polymorphisms. Since SLE is associated with so many genetic regions, it is likely an oligogenic trait, meaning that there are several genes that control susceptibility to the disease.[50] Further complicating our understanding is the association of certain linkages with various ethnic groups.[50]
Decorin is a protein coded for by the DCN gene. This protein is a component of the extracellular matrix, which is the intricate lattice of proteins and other molecules that forms in the spaces between cells. Decorin is found in the extracellular matrix of a variety of connective tissues, including skin, tendon, bone, and cartilage. Connective tissues support the body’s joints and organs. Decorin is involved in the organization of proteins called collagens. Collagens strengthen and support connective tissues throughout the body. Collagens also play an important role in the cornea, which is the clear outer covering of the eye. Bundles of collagen called fibrils must be strictly organized for the cornea to be transparent. Decorin ensures that these collagen fibrils are uniformly sized and regularly spaced.
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Lupus Erythematosus is a chronic autoimmune disease that causes the immune system to attack one’s body. The disease is characterized by the inflammation of various healthy tissues and organs in the body, including the joints, skin, kidneys, heart, lungs, blood vessels and brain. The severity of the disease may vary because no two cases of lupus are exactly alike.
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.[10] The anti-dsDNA antibody titers also tend to reflect disease activity, although not in all cases.[10] 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.[71]
Try to cut down on salt. Ideally you should only be ingesting one teaspoon (5 g) of salt (sodium chloride) a day. Don’t add salt when you cook foods and use as little as possible at table. Use lemon juice, herbs and other spices to give dishes flavour. Read labels on foods to exclude those that have a high salt content. Some medications also contain sodium and may have to be excluded.
Common initial and chronic complaints include fever, malaise, joint pains, muscle pains, and fatigue. Because these symptoms are so often seen in association with other diseases, these signs and symptoms are not part of the diagnostic criteria for SLE. When occurring in conjunction with other signs and symptoms (see below), however, they are considered suggestive.[11]

The clearance of early apoptotic cells is an important function in multicellular organisms. It leads to a progression of the apoptosis process and finally to secondary necrosis of the cells if this ability is disturbed. Necrotic cells release nuclear fragments as potential autoantigens, as well as internal danger signals, inducing maturation of dendritic cells (DCs), since they have lost their membranes' integrity. Increased appearance of apoptotic cells also stimulates inefficient clearance. That leads to maturation of DCs and also to the presentation of intracellular antigens of late apoptotic or secondary necrotic cells, via MHC molecules. Autoimmunity possibly results by the extended exposure to nuclear and intracellular autoantigens derived from late apoptotic and secondary necrotic cells. B and T cell tolerance for apoptotic cells is abrogated, and the lymphocytes get activated by these autoantigens; inflammation and the production of autoantibodies by plasma cells is initiated. A clearance deficiency in the skin for apoptotic cells has also been observed in people with cutaneous lupus erythematosus (CLE).[67]

Joints that are red, warm, tender, and swollen may signal lupus. Aching and stiffness alone aren’t enough; the joints have to be affected by arthritis and these other "cardinal signs of inflammation," says Michael Belmont, MD, director of the lupus clinic at Bellevue Hospital and medical director at the New York University Hospital for Joint Diseases in New York City.

​Subacute cutaneous: The skin symptoms of subacute cutaneous lupus are usually mild. People with this condition, which is also its own form of lupus, present with reddish-purple plaques, which are firm and raised, flattened skin lesions. These plaques can be found alone or in groups and range in size from 5 mm to 20 mm, usually appearing on the trunk, including the upper chest and back. About 10 percent of people with SLE have subacute cutaneous lupus. Certain drugs may also cause subacute cutaneous lupus. 

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