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.
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.
Lupus disease, especially when active, could lead to accelerated atherosclerosis (clogging of the arteries) which can develop in young women and could also lead to heart attacks, heart failure, and strokes. Thus, it is vital that patients with lupus, in addition to controlling their disease, exercise and lower other risk factors for heart disease, such as smoking, high blood pressure, and high cholesterol.
Chemokines are low-molecular-weight proteins that stimulate recruitment of leukocytes. They are secondary pro-inflammatory mediators that are induced by primary pro-inflammatory mediators such as interleukin-1 (IL-1) or tumor necrosis factor (TNF). The physiologic importance of this family of mediators is derived from their specificity. Unlike the classic leukocyte chemo-attractants, which have little specificity, members of the chemokine family induce recruitment of well-defined leukocyte subsets. Thus, chemokine expression can account for the presence of different types of leukocytes observed in various normal or pathologic states.
Once remission is achieved, start maintenance therapy with azathioprine or mycophenolate mofetil (ie, use less potent agents relative to long-term cyclophosphamide). The ALMS maintenance trial also found that mycophenolate mofetil was superior to azathioprine in the maintenance of the renal response to treatment and in the prevention of relapse in patients with lupus nephritis.  In the MAINTAIN trial, there was a trend toward fewer renal flares in patients receiving mycophenolate mofetil than in those receiving azathioprine  ; however, these results did not reach statistical significance.
Lupus is treated by internal medicine subspecialists called rheumatologists. Depending on whether or not specific organs are targeted, other health specialists who can be involved in the care of patients with lupus include dermatologists, nephrologists, hematologists, cardiologists, pulmonologists, and neurologists. It's not uncommon that a team of such physicians is coordinated by the treating rheumatologist together with the primary care doctor.
Lyme disease is caused by the bacterium Borrelia burgdorferi and is transmitted to humans through the bite of infected blacklegged ticks. Typical symptoms include fever, headache, fatigue, and a characteristic skin rash called erythema migraines. If left untreated, infection can spread to joints, the heart, and the nervous system. Lyme disease is diagnosed based on symptoms, physical findings (e.g., rash), and the possibility of exposure to infected ticks; laboratory testing is helpful if used correctly and performed with validated methods. Most cases of Lyme disease can be treated successfully with a few weeks of antibiotics. Steps to prevent Lyme disease include using insect repellent, removing ticks promptly, applying pesticides, and reducing tick habitat. The ticks that transmit Lyme disease can occasionally transmit other tickborne diseases as well.
The lupus erythematosus (LE) cell test was commonly used for diagnosis, but it is no longer used because the LE cells are only found in 50–75% of SLE cases, and they are also found in some people with rheumatoid arthritis, scleroderma, and drug sensitivities. Because of this, the LE cell test is now performed only rarely and is mostly of historical significance.
In studies conducted so far, African American patients and patients of African heritage did not appear to respond significantly to belimumab. An additional study of this patient population is planned to evaluate belimumab further in this subgroup of lupus patients. However, this difference in response to a treatment may be another indicator of the various ways that the disease affects different patients.
Based on the identified evidence the panel concluded that compared with GCs alone, the addition of other IS (CYC, MMF or TAC) is associated with significant benefits, higher remission rates and lower progression rates to end-stage renal disease (ESRD). Head-to-head comparisons between MMF, TAC and high-dose CYC showed that MMF and TAC are associated with less adverse effects than high-dose CYC. Between low and high-dose CYC the balance favours the former because of better safety profile and comparable efficacy, although this conclusion is based on one trial that included predominantly Caucasians. RTX did not provide additional benefits when combined with MMF.
The term undifferentiated connective tissue diseases is used to define conditions characterized by the presence of signs and symptoms suggestive of a systemic autoimmune disease that do not satisfy the classificative criteria for defined connective tissue diseases (CTD) such as systemic lupus erythematosus (SLE), Sjögren’s syndrome (SS), rheumatoid arthritis (RA) and others. A small percentage of patients presenting with an undifferentiated profile will develop during the first year follow up of a full blown CTD, however an average of 75% will maintain an undifferentiated clinical course. These patients may be defined as having a stable undifferentiated connective tissue diseases (UCTD). The most characteristic symptoms of UCTD are represented by arthritis and arthralgias, Raynaud’s phenomenon, leukopenia, while neurological and kidney involvement are virtually absent. Eighty percent of these patients have a single autoantibody specificity, more frequently anti-Ro and anti-RNP antibodies. Stable UCTD are considered as distinct clinical entities and therefore it has been proposed to define those conditions as UCTD. Classificative criteria have also been proposed and a work to better define them is still under way.
Because lupus can produce a variety of symptoms in different individuals, it may take some time for a physician to actually make the diagnosis. Often a doctor will say that lupus might be present, but that the current symptoms are insufficient to signify a firm diagnosis. In this event, s/he will likely monitor the patient’s symptoms, signs, and lab tests closely over time and have him/her return for regular visits.
"Keeping my weight under control has been a battle. I have tried diets. I know that being overweight increases joint stress and stress on my heart, both of which can be affected by lupus," says LaPlant. Some of the medications that people take for lupus can make it difficult to maintain a healthy weight. Prednisone, one of the most common medications used to treat lupus flares, can increase your appetite and lead to significant weight gain. Regular, low-impact exercise can help offset weight gain and also improve your health in general.
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.
Two working teams on logistics and methodological issues constituted by experienced Latin American rheumatologists and experts in the Grading of Recommendations Assessment, Development and Evaluation (GRADE) guideline system developed a framework for these guidelines. Nine organ/system sections were prepared with the main findings. Special emphasis was placed on reviewing local problems and regional publications.
The global rates of SLE are approximately 20–70 per 100,000 people. In females, the rate is highest between 45 and 64 years of age. The lowest overall rate exists in Iceland and Japan. The highest rates exist in the US and France. However, there is not sufficient evidence to conclude why SLE is less common in some countries compared to others; it could be the environmental variability in these countries. For example, different countries receive different levels of sunlight, and exposure to UV rays affects dermatological symptoms of SLE. Certain studies hypothesize that a genetic connection exists between race and lupus which affects disease prevalence. If this is true, the racial composition of countries affects disease, and will cause the incidence in a country to change as the racial makeup changes. In order to understand if this is true, countries with largely homogenous and racially stable populations should be studied to better understand incidence. Rates of disease in the developing world are unclear.
While SLE can occur in both males and females, it is found far more often in women, and the symptoms associated with each sex are different. Females tend to have a greater number of relapses, a low white blood cell count, more arthritis, Raynaud's phenomenon, and psychiatric symptoms. Males tend to have more seizures, kidney disease, serositis (inflammation of tissues lining the lungs and heart), skin problems, and peripheral neuropathy.
Your primary care doctor should coordinate care between your different health care providers and treat other problems as they come up. Your doctor will develop a treatment plan to fit your needs. You and your doctor should review the plan often to be sure it is working. You should report new symptoms to your doctor right away so that your treatment plan can be changed if needed.
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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