Handout on Health
Systemic Lupus
Erythematosus
This is a publication of
the
National
Institutes of Health
National Institute of Arthritis and Musculoskeletal and
Skin Diseases
This publication is not
copyrighted. Readers are encouraged to duplicate and
distribute as many copies as needed.
Printed copies of this
booklet are available from the
National Arthritis and Musculoskeletal and Skin Diseases
Information Clearinghouse,
National Institutes of Health (NAMSIC/NIH),
1 AMS Circle, Bethesda, Maryland 20892-3675.
Phone: (301) 495-4484
Fax: (301) 587-4352
Systemic Lupus
Erythematosus
This booklet is for
people who have systemic lupus erythematosus, commonly
called SLE or lupus, as well as for their family and
friends and others who want to better understand the
disease. The booklet describes the disease and its
symptoms and contains information about diagnosis and
treatment as well as current research efforts supported
by the National Institute of Arthritis and
Musculoskeletal and Skin Diseases (NIAMS) and other
components of the National Institutes of Health (NIH). It
also discusses issues such as health care, pregnancy, and
quality of life for people with lupus. If you have
further questions after reading this booklet, you may
wish to discuss them with your doctor.
Defining Lupus
Lupus is a
type of immune system disorder known as an autoimmune
disease. In autoimmune diseases, the body harms its own
healthy cells and tissues. This leads to inflammation and
damage of various body tissues. Lupus can affect many
parts of the body, including the joints, skin, kidneys,
heart, lungs, blood vessels, and brain. Although people
with the disease may have many different symptoms, some
of the most common ones include extreme fatigue, painful
or swollen joints (arthritis), unexplained fever, skin
rashes, and kidney problems. Lupus is also known as a
rheumatic disease. The rheumatic diseases are a group of
disorders that cause aches, pain, and stiffness in the
joints, muscles, and bones.
At present, there is no
cure for lupus. However, the symptoms of lupus can be
controlled with appropriate treatment, and most people
with the disease can lead active, healthy lives. Lupus is
characterized by periods of illness, called flares, and
periods of wellness, or remission. Understanding how to
prevent flares and how to treat them when they do occur
helps people with lupus maintain better health. Intense
research is underway and scientists funded by the NIH are
continuing to make great strides in understanding the
disease, which ultimately may lead to a cure.
Two of the questions
researchers are studying are who gets lupus and why. We
know that many more women than men have lupus. Lupus is
three times more common in black women than in white
women and is also more common in women of Hispanic,
Asian, and Native American descent. In addition, lupus
can run in families, but the risk that a child or a
brother or sister of a patient also will have lupus is
still quite low. It is difficult to estimate how many
people in the United States have the disease because its
symptoms vary widely and its onset is often hard to
pinpoint.
Although "lupus"
is used as a broad term, there actually are several kinds
of lupus:
- Systemic lupus
erythematosus (SLE), which is the form of the
disease that most people are referring to when
they say "lupus." The word
"systemic" means the disease can affect
many parts of the body. The symptoms of SLE may
be mild or serious. Although SLE usually first
affects people between the ages of 15 and 45
years, it can occur in childhood or later in life
as well. This booklet focuses on SLE.
- Discoid lupus
erythematosus primarily affects the skin. A red,
raised rash may appear on the face, scalp, or
elsewhere. The raised areas may become thick and
scaly. The rash may last for days or years and
may recur. A small percentage of people with
discoid lupus later develop SLE.
- Drug-induced lupus
refers to a form of lupus caused by medication.
It causes some symptoms similar to those of SLE
(arthritis, rash, fever, and chest pain, but not
kidney disease) that go away when the drug is
stopped. Common medications that may cause
drug-induced lupus include hydralazine
(Apresoline), procainamide (Procan, Pronestyl),
methyldopa (Aldomet), quinidine (Quinaglute),
isoniazid (INH), and some anti-seizure
medications such as phenytoin (Dilantin) or
carbamazepine (Tegretol).
- Neonatal lupus can
affect some newborn babies of women with SLE or
certain other immune system disorders. Babies
with neonatal lupus may have a serious heart
defect. Other affected babies may have a skin
rash, liver abnormalities, or low blood counts.
Physicians can now identify most at-risk SLE
patients, allowing for prompt treatment of the
infant at birth. Neonatal lupus is very rare, and
most infants of mothers with SLE are entirely
healthy.
Understanding What
Causes Lupus
Lupus is a complex
disease whose cause is unknown. It is likely that there
is no single cause but rather a combination of genetic,
environmental, and possibly hormonal factors that work
together to cause the disease. The exact cause may differ
from one person to another. Scientists are making
progress in understanding the causes of lupus, as
described here and in the Current Research section of
this booklet. Research suggests that genetics plays an
important role; however, no specific "lupus
gene" has been identified. Instead, it appears that
several genes may increase a person's susceptibility to
the disease.
The fact that lupus can
run in families indicates that development of this
disease has a genetic basis. In addition, studies of
identical twins have shown that lupus is much more likely
to affect both members of a pair of identical twins, who
share the exact same set of genes, than two nonidentical
twins or other siblings. Because the risk for identical
twins is far less than 100 percent, however, scientists
think that genes alone cannot account for who gets lupus.
Other factors must also play a role.
Some of the factors that
scientists are studying include sunlight, stress, certain
drugs, and infectious agents such as viruses. Even though
a virus might trigger the disease in susceptible
individuals, a person cannot "catch" lupus from
someone else.
In lupus, the body's
immune system doesn't work as it should. A healthy immune
system produces antibodies, which are special proteins
that help fight and destroy viruses, bacteria, and other
foreign substances that invade the body. In lupus, the
immune system produces antibodies against the body's
healthy cells and tissues. These antibodies, called
autoantibodies ("auto" means self), contribute
to the inflammation of various parts of the body, causing
swelling, redness, heat, and pain. In addition, some
autoantibodies join with substances from the body's own
cells or tissues to form molecules called immune
complexes. A buildup of these immune complexes in the
body also contributes to inflammation and tissue injury
in people with lupus. Researchers do not yet understand
all of the factors that cause inflammation and tissue
damage in lupus, and this is an active area of research.
Symptoms of Lupus
Each person's
experience with lupus is different. Symptoms can range
from mild to severe and may come and go over time. Common
symptoms of lupus include extreme fatigue, painful or
swollen joints, unexplained fever, and skin rashes. A
characteristic skin rash may appear across the nose and
cheeks - the so-called butterfly or malar rash. Other
rashes occur elsewhere on the face and ears, upper arms,
shoulders, chest, and hands.
Other symptoms of lupus
include chest pain, hair loss, sensitivity to the sun,
anemia (a decrease in red blood cells), and pale or
purple fingers and toes from cold and stress. Some people
also experience headaches, dizziness, depression, or
seizures. New symptoms may continue to appear years after
the initial diagnosis, and different symptoms can occur
at different times.
Common
Symptoms of Lupus
- Painful or
swollen joints and muscle pain
- Unexplained
fever
- Extreme
fatigue
- Red rash or
color change on the face
- Chest pain
upon deep breathing
- Unusual loss
of hair
- Pale or
purple fingers or toes from cold or
stress (Raynaud's phenomenon)
- Sensitivity
to the sun
- Swelling
(edema) in legs or around eyes
- Swollen
glands
|
In some
people with lupus, only one system of the body such as
the skin or joints is affected. Other people experience
symptoms in many parts of their body. Just how seriously
a body system is affected also varies from person to
person. Most commonly, joints and muscles are affected,
causing arthritis and muscle pain. Skin rashes also are
quite common. The following systems in the body also can
be affected by lupus.
- Kidneys:
Inflammation
of the kidneys (nephritis) can impair their
ability to effectively get rid of waste products
and other toxins from the body. Because the
kidneys are so important to overall health, lupus
in the kidneys generally requires intensive drug
treatment to prevent permanent damage. There is
usually no pain associated with kidney
involvement, although some patients may notice
that their ankles swell. Most often the only
indication of kidney disease is an abnormal urine
test.
- Central
nervous system:
In
some patients, lupus affects the brain or central
nervous system. This can cause headaches,
dizziness, memory disturbances, vision problems,
stroke, or changes in behavior. Some of these
symptoms, however, also can be caused by some
treatments of lupus or by the emotional stress of
dealing with the disease.
- Blood
vessels:
Blood
vessels may become inflamed (vasculitis),
affecting the way blood circulates through the
body. The inflammation may be mild, and may not
require treatment.
- Blood:
People
with lupus may develop anemia or leukopenia (a
decreased number of white blood cells). Lupus
also may cause thrombocytopenia, a decreased
number of platelets in the blood that contributes
to an increased chance of bleeding. Some people
with lupus may have an increased risk for blood
clots.
- Lungs:
Some
people with lupus develop pleuritis, an
inflammation of the lining of the chest cavity
that causes chest pain, particularly with
breathing. Patients with lupus also may get
pneumonia.
- Heart:
In
some people with lupus, inflammation can occur in
the arteries that supply blood to the heart
(coronary vasculitis), the heart itself
(myocarditis and endocarditis), or the membrane
that surrounds it (pericarditis), causing chest
pains or other symptoms.
Diagnosing Lupus
Diagnosing lupus can
be difficult. It may take months or even years for
doctors to piece together the symptoms to accurately
diagnose this complex disease. Making a correct diagnosis
of lupus requires knowledge and awareness on the part of
the doctor and good communication on the part of the
patient. Telling the doctor a complete, accurate medical
history (for example, what health problems you have had
and for how long) is critical to the process of
diagnosis. This information, along with a physical
examination and the results of laboratory tests, helps
the doctor consider other diseases that may mimic lupus,
or determine if the patient truly has the disease.
Reaching a diagnosis may take time and occur gradually as
new symptoms appear.
No single test can
determine whether a person has lupus, but several
laboratory tests may help the doctor to make a diagnosis.
The most useful tests identify certain blood
autoantibodies often present in people with lupus. For
example, the antinuclear antibody (ANA) test is commonly
used to look for autoantibodies that react against
components of the nucleus, or "command center,"
of the patient's own cells. Many people with lupus test
positive for ANA; however, some drugs, infections, and
other diseases also can cause a positive result. The ANA
test simply provides another clue for the doctor to
consider in making a diagnosis. There are also blood
tests for individual types of autoantibodies that are
more specific to people with lupus, although not all
people with lupus test positive for these. These
antibodies include anti-DNA, anti-Sm, anti-RNP, anti-Ro
(SSA), and anti-La (SSB). The doctor may use these
antibody tests to help make a diagnosis of lupus.
Some tests are used less
frequently but may be helpful if the cause of a person's
symptoms remains unclear. The doctor may order a biopsy
of the skin or kidneys if those body systems are
affected. Some doctors may order a syphilis test because
some lupus antibodies in the blood may cause the test to
be falsely positive. A positive test does not mean that a
patient has syphilis. Again, all these tests merely serve
as tools to give the doctor clues and information in
making a diagnosis. The doctor will look at the entire
picture - medical history, symptoms, and test results -
to determine if a person has lupus.
Other laboratory tests are
used to monitor the progress of the disease once it has
been diagnosed. A complete blood count (CBC), urinalysis,
blood chemistries, and erythrocyte sedimentation rate
(ESR) test can provide valuable information. (The ESR is
a measure of inflammation in the body. It tests how
quickly red blood cells drop to the bottom of a tube of
unclotted blood.) Another common test measures the blood
level of a group of proteins called complement. People
with lupus often have low complement levels, especially
during flares of the disease.
Diagnostic
Tools for Lupus
- Medical
history
- Complete
physical examination
- Laboratory
tests:
Complete blood count
Erythrocyte
sedimentation rate (ESR) - an elevated
ESR indicates inflammation in the body
Urinalysis
Blood
chemistries
Complement
levels - often low in people with lupus,
especially during a flare
Antinuclear
antibody test (ANA) - positive in most
lupus patients, but a positive ANA test
can have other causes
Other
autoantibody tests (anti-DNA, anti-Sm,
anti-RNP, anti-Ro [SSA], anti- La [SSB]):
One or more of these tests may be
positive in some people with lupus
Syphilis
test - may be falsely positive in people
with lupus
- Skin or
kidney biopsy
|
Treating Lupus
Diagnosing and
treating lupus is often a team effort between the patient
and several types of health care professionals. A person
can go to his or her family doctor or internist, or can
visit a rheumatologist. A rheumatologist is a doctor who
specializes in arthritis and other diseases of the
joints, bones, and muscles. Clinical immunologists
(doctors specializing in immune system disorders) may
also treat people with lupus. As treatment progresses,
other professionals often help. These may include nurses,
psychologists, social workers, and specialists such as
nephrologists (doctors who treat kidney disease),
hematologists (doctors specializing in blood disorders),
dermatologists (doctors who treat skin disease), and
neurologists (doctors specializing in disorders of the
nervous system).
The range and
effectiveness of treatments for lupus have increased
dramatically, giving doctors more choices in how to treat
the disease. It is important for the patient to work
closely with the doctor and take an active role in
treatment. Once lupus has been diagnosed, the doctor will
develop a treatment plan based on the patient's age,
gender, health, symptoms, and lifestyle. Treatment plans
are tailored to the individual's needs and may change
over time. In developing a treatment plan, the doctor has
several goals: to prevent flares, to treat them when they
do occur, and to minimize complications. The doctor and
patient should reevaluate the plan regularly to ensure
that it is as effective as possible.
Several types of drugs are
used to treat lupus. The treatment the doctor chooses is
based on the patient's individual symptoms and needs. For
people with joint pain, fever, and swelling, drugs that
decrease inflammation, referred to as nonsteroidal
anti-inflammatory drugs (NSAIDs), are often used. While
some NSAIDs are available over the counter, a doctor's
prescription is necessary for others. NSAIDs may be used
alone or in combination with other types of drugs to
control pain, swelling, and fever. Even though some
NSAIDs may be purchased without a prescription, it is
important that they be taken under a doctor's direction
because the dose for people with lupus may differ from
the dose recommendations on the bottle. Common side
effects of NSAIDs, including those available over the
counter, can include stomach upset, heartburn, diarrhea,
and fluid retention. Some lupus patients also develop
liver and kidney inflammation while taking NSAIDs, making
it especially important to stay in close contact with the
doctor while taking these medications.
| NSAIDs Used To Treat
Lupus* |
| Generic Name Ibuprofen
Naproxen
Sulindac
Diclofenac
Piroxicam
Ketoprofen
Diflunisal
Nabumetone
Etodolac
Oxaprozin
Indomethacin
|
Brand Name Motrin, Advil
Naprosyn, Aleve
Clinoril
Voltaren
Feldene
Orudis
Dolobid
Relafen
Lodine
Daypro
Indocin
|
| * Brand names included in
this fact sheet are provided as examples
only and their inclusion does not mean
that these products are endorsed by the
National Institutes of Health or any
other Government agency. Also, if a
particular brand name is not mentioned,
this does not mean or imply that the
product is unsatisfactory. |
|
Antimalarials
are another type of drug commonly used to treat lupus.
These drugs were originally used to treat the symptoms of
malaria, but doctors have found that they also are useful
treatments for lupus. Exactly how antimalarials work in
lupus is unclear, but scientists think that they may work
by suppressing parts of the immune response. Specific
antimalarials used to treat lupus include
hydrochloroquine (Plaquenil), chloroquine (Aralen), and
quinacrine (Atabrine). They may be used alone or in
combination with other drugs and generally are used to
treat fatigue, joint pain, skin rashes, and inflammation
of the lungs. Research doctors have found that continuous
treatment with antimalarials may prevent flares from
recurring. Side effects of antimalarials can include
stomach upset and, extremely rarely, damage to the retina
of the eye.
The mainstay of lupus
treatment involves the use of corticosteroid hormones,
such as prednisone (Deltasone), hydrocortisone,
methylprednisolone (Medrol), and dexamethasone (Decadron,
Hexadrol). Corticosteroids are related to cortisol, which
is a natural anti-inflammatory hormone. They work by
rapidly suppressing inflammation. Corticosteroids can be
given by mouth, in creams applied to the skin, or by
injection. Because they are potent drugs, the doctor will
seek the lowest dose with the greatest benefit.
Short-term side effects of corticosteroids include
swelling, increased appetite, weight gain, and emotional
ups and downs. These side effects generally stop when the
drug is stopped. It can be dangerous to stop taking
corticosteroids suddenly, so it is very important that
the doctor and patient work together in changing the
corticosteroid dose. Sometimes doctors give very large
amounts of corticosteroid by vein ("bolus" or
"pulse" therapy). With this treatment, the
typical side effects are less likely and slow withdrawal
is unnecessary.
Long-term side effects of
corticosteroids can include stretch marks on the skin,
excessive hair growth, weakened or damaged bones, high
blood pressure, damage to the arteries, high blood sugar,
infections, and cataracts. Typically, the higher the dose
of corticosteroids, the more severe the side effects.
Also, the longer they are taken, the greater the risk of
side effects. Researchers are working to develop
alternative strategies to limit or offset the use of
corticosteroids. For example, corticosteroids may be used
in combination with other, less potent drugs, or the
doctor may try to slowly decrease the dose once the
disease is under control. People with lupus who are using
corticosteroids should talk to their doctors about taking
supplemental calcium and vitamin D to reduce the risk of
osteoporosis (weakened, fragile bones).
For patients whose kidneys
or central nervous systems are affected by lupus, a type
of drug called an immunosuppressive may be used.
Immunosuppressives, such as azathioprine (Imuran) and
cyclophosphamide (Cytoxan), restrain the overactive
immune system by blocking the production of some immune
cells and curbing the action of others. These drugs may
be given by mouth or by infusion (dripping the drug into
the vein through a small tube). Side effects may include
nausea, vomiting, hair loss, bladder problems, decreased
fertility, and increased risk of cancer and infection.
The risk for side effects increases with the length of
treatment. As with other treatments for lupus, there is a
risk of relapse after the immunosuppressives have been
stopped.
In special circumstances,
patients may require stronger drugs to combat the
symptoms of lupus. For patients who cannot take
corticosteroids, a type of immunosuppressive drug called
methotrexate (Folex, Mexate, Rheumatrex) may be used to
help control the disease. Patients who have many body
systems affected by the disease may receive intravenous
gamma globulin (Gammagard, Gammar, Gamine), a blood
protein that increases immunity and helps fight
infection. Gamma globulin also may be used to control
acute bleeding in patients with thrombocytopenia or to
prepare a person with lupus for surgery.
Working closely with the
doctor helps ensure that treatments for lupus are as
successful as possible. Because some treatments may cause
harmful side effects, it is important to promptly report
any new symptoms to the doctor. It is also important not
to stop or change treatments without talking to the
doctor first.
Because of the nature and
cost of the medications used to treat lupus, their
potentially serious side effects, and the lack of a cure,
many patients seek other ways of treating the disease.
Some alternative approaches that have been suggested
include special diets, nutritional supplements, fish
oils, ointments and creams, chiropractic treatment, and
homeopathy. Although these methods may not be harmful in
and of themselves, no research to date shows that they
help. Some alternative or complementary approaches may
help the patient cope or reduce some of the stress
associated with living with a chronic illness. If the
doctor feels the approach has value and will not be
harmful, it can be incorporated into the patient's
treatment plan. However, it is important not to neglect
regular health care or treatment of serious symptoms.
Lupus and Quality
of Life
Despite the symptoms
of lupus and the potential side effects of treatment,
people with lupus can maintain a high quality of life
overall. One key to managing lupus is to understand the
disease and its impact. Learning to recognize the warning
signs of a flare can help the patient take steps to ward
it off or reduce its intensity. Many people with lupus
experience increased fatigue, pain, a rash, fever,
stomach discomfort, headache, or dizziness just before a
flare. Developing strategies to prevent flares can also
be helpful, such as limiting exposure to the sun (intense
sun exposure triggers flares in some patients) and
scheduling adequate rest and quiet times.
It is also important for
people with lupus to receive regular health care, instead
of seeking help only when symptoms worsen. Having a
medical exam and lab work on a regular basis allows the
doctor to note any changes and may help predict flares.
The treatment plan, which is tailored to the individual's
specific needs and circumstances, can be adjusted
accordingly. If new symptoms are identified early,
treatments may be more effective. Other concerns also can
be addressed at regular checkups. The doctor can provide
guidance about such issues as the use of sunscreens,
stress reduction, and the importance of structured
exercise and rest, as well as birth control and family
planning. Because people with lupus can be more
susceptible to infections, the doctor may recommend
yearly influenza vaccinations for some patients.
Warning
Signs of a Flare
- Increased
fatigue
- Pain
- Rash
- Fever
- Stomach
discomfort
- Headache
- Dizziness
|
Preventing
a Flare
- Learn to
recognize warning signals
- Maintain good
communication with your doctor
- Set realistic
goals and priorities
- Limit
exposure to the sun
- Maintain a
healthy, balanced diet
- Try to limit
stress
- Schedule
adequate rest and quiet times
- Participate
in moderate exercise when possible
- Develop a
support system
|
People with
lupus should receive regular preventive health care, such
as gynecological and breast examinations. Regular dental
care will help avoid potentially dangerous infections. If
a person is taking corticosteroids or antimalarial
medications, a yearly eye exam should be done to screen
for and treat eye problems.
Staying healthy requires
extra effort and care for people with lupus, so it
becomes especially important to develop strategies for
maintaining wellness. Wellness involves close attention
to the body, mind, and spirit. One of the primary goals
of wellness for people with lupus is coping with the
stress of having a chronic disorder. Effective stress
management varies from person to person. Some approaches
that may help include exercise, relaxation techniques
such as meditation, and setting priorities for spending
time and energy.
Developing and maintaining
a good support system is also important. A support system
may include family, friends, medical professionals,
community organizations, and organized support groups.
Participating in a support group can provide emotional
help, boost self-esteem and morale, and help develop or
improve coping skills. (For more information on support
groups, see the Additional Resources section at the end
of this booklet).
Learning more about lupus
may also help. Studies have shown that patients who are
well informed and participate actively in their own care
experience less pain, make fewer visits to the doctor,
build self confidence, and remain more active.
Tips for
Working With Your Doctor
- Find a doctor
who will listen to and address your
concerns.
- Provide
complete, accurate medical information.
- Make a list
of your questions and concerns in
advance.
- Be honest and
share your point of view with the doctor.
- Ask for
clarification or further explanation if
you need it.
- Talk to other
members of the health care team, such as
nurses, therapists, or pharmacists.
- Don't
hesitate to discuss sensitive subjects
(for example, birth control, sex) with
your doctor.
- Discuss any
treatment changes with your doctor before
making them.
|
Pregnancy For
Women With Lupus
Twenty years ago,
women with lupus were counseled not to become pregnant
because of the risk of a flare of the disease and an
increased risk of miscarriage. Thanks to research and
careful treatment, more and more women with lupus can
have successful pregnancies. Although a lupus pregnancy
is still considered high risk, most women with lupus
carry their babies safely to the end of their pregnancy.
Experts disagree on the exact numbers, but 20 to 25
percent of lupus pregnancies end in miscarriage, compared
to 10 to 15 percent of pregnancies in women without the
disease. Pregnancy counseling and planning before
pregnancy is important. Ideally, a woman should have no
signs or symptoms of lupus and be taking no medications
for at least 6 months before she becomes pregnant.
Some women may experience
a mild to moderate flare during or after their pregnancy;
others do not. Pregnant women with lupus, especially
those taking corticosteroids, also are more likely to
develop high blood pressure, diabetes, hyperglycemia
(high blood sugar), and kidney complications, so regular
care and good nutrition during pregnancy is essential. It
is also advisable to have access to a neonatal (newborn)
intensive care unit at the time of delivery in case the
baby requires special medical attention. About 25 percent
(one in four) of babies of women with lupus are born
prematurely, but do not suffer from birth defects.
It is important to
consider treatment options during pregnancy. The woman
and her doctor must weigh the potential risks and
benefits of each option to both mother and baby. Some
drugs used to treat lupus should not be used at all
during pregnancy because they may harm the baby or cause
a miscarriage. A woman with lupus who becomes pregnant
needs to work closely with both her obstetrician and her
lupus doctor. They can work together to evaluate her
individual needs and circumstances.
The fear of miscarriage is
very real for many pregnant women with lupus. Researchers
have now identified two closely related lupus
autoantibodies, anticardiolipin antibody and lupus
anticoagulant (together called the antiphospholipid
antibodies), that are associated with risk of
miscarriage. One-third to one-half of women with lupus
have these antibodies, which can be detected by blood
tests. Identifying women with these antibodies early in
the pregnancy may help doctors take steps to reduce the
risk of miscarriage. Pregnant women who test positive for
these antibodies and who have had previous miscarriages
are generally treated with baby aspirin or the drug
heparin throughout their pregnancy. In a small percentage
of cases, babies of women who have specific antibodies
called anti-Ro (SSA) and anti-La (SSB) have symptoms of
lupus such as a rash or low blood count. This is not the
same as systemic lupus erythematosus and is almost always
temporary. Most babies with symptoms of neonatal lupus
need no treatment at all.
Current Research
Lupus is the focus of
much research as scientists try to determine what causes
the disease and how it can best be treated. Some of the
questions they are working to answer include: Exactly who
gets lupus, and why? Why are women more likely than men
to have the disease? Why are there more cases of lupus in
some racial and ethnic groups? What goes wrong in the
immune system, and why? How can we correct the way the
immune system functions once something goes wrong? What
treatment approaches will work best to lessen or cure
symptoms of lupus?
To help answer these
questions, scientists are developing new and better ways
to study the disease. They are doing laboratory studies
that compare various aspects of the immune systems of
people with lupus with those of other people both with
and without lupus. They also use mice with disorders
resembling lupus to explore how the immune system
functions in the disease and to identify possible new
therapies.
The National Institute of
Arthritis and Musculoskeletal and Skin Diseases (NIAMS),
a component of the National Institutes of Health (NIH),
funds many individual researchers across the United
States who are studying lupus. To help scientists gain
new knowledge, NIAMS also has established Specialized
Centers of Research devoted specifically to lupus
research. In addition, NIAMS is funding several lupus
registries that will gather medical information as well
as blood and tissue samples from patients and their
relatives. This will give researchers across the country
access to information and materials they can use to help
identify genes that determine susceptibility to the
disease.
Identifying genes that
play a role in the development of lupus is an active area
of research. For example, researchers suspect a genetic
defect in a cellular process called apoptosis, or
"programmed cell death" in people with lupus.
Apoptosis allows the body to safely get rid of damaged or
potentially harmful cells. If there is a problem in the
apoptosis process, harmful cells may stay around and do
damage to the body's own tissues. For example, in a
mutant mouse strain that develops a lupus-like illness,
one of the genes that controls apoptosis, called the fas
gene, is defective. When it is replaced with a normal fas
gene, the mice no longer develop signs of the disease.
Scientists are studying what role genes involved in
apoptosis may play in human disease development.
Studying genes for
complement, a series of proteins in the blood that play
an important part in the immune system, is another active
area of lupus research. Complement acts as a backup for
antibodies, helping them destroy foreign substances that
invade the body. If there is a decrease in complement,
the body is less able to fight or destroy foreign
substances. If these substances are not removed from the
body, the immune system may become overactive and begin
to make autoantibodies.
Research to identify genes
that predispose some people to the more serious
complications of lupus, such as kidney disease, is
producing significant findings. NIAMS-supported
researchers have identified a gene associated with an
increased risk of lupus kidney disease in African
Americans. Variations in this gene affect the immune
systems ability to remove potentially harmful immune
complexes from the body. Researchers are also making
progress in identifying other genes that play a role in
lupus.
Researchers also are
studying other factors that may affect a person's
susceptibility to lupus. For example, because lupus is
more common in women than in men some researchers are
investigating the role of hormones and other male-female
differences in the development and course of the disease.
Promising
Areas of Research
- Identifying
lupus susceptibility genes
- Searching for
environmental agents that cause lupus
- Developing
drugs or biologic agents that cure lupus
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A current
study funded by the NIH is focusing on the safety and
effectiveness of oral contraceptives (birth-control
pills) and hormone replacement therapy in women with
lupus. Doctors have worried about the wisdom of
prescribing oral contraceptives or estrogen replacement
therapy for women with lupus because of a widely held
view that estrogens can make the disease worse. However,
recent limited data suggest these drugs may be safe for
some women with lupus. Researchers hope this study will
yield options for safe, effective methods of birth
control for young women with lupus and enable
postmenopausal women with lupus to benefit from estrogen
replacement therapy.
Researchers are also
focusing on finding better treatments for lupus. A
primary goal of this research is to develop treatments
that can effectively minimize the use of corticosteroids.
Scientists are trying to identify combination therapies
that may be more effective than single-treatment
approaches. Researchers are also interested in using male
hormones, called androgens, as a possible treatment for
the disease. Another goal is to improve the treatment and
management of lupus in the kidneys and central nervous
system. For example, a 20-year study supported by NIAMS
and NIH found that combining cyclophosphamide with
prednisone helped delay or prevent kidney failure, a
serious complication of lupus.
On the basis of new
information about the disease process, scientists are
using novel "biologic agents" to selectively
block parts of the immune system. Development and testing
of these new drugs, which are based on compounds that
occur naturally in the body, is an exciting and promising
new area of lupus research. The hope is that these
treatments not only will be effective but also will have
fewer side effects. Other treatment options currently
being explored include reconstructing the immune system
by bone marrow transplantation. In the future, gene
therapy also may play an important role in lupus
treatment.
Hope for the
Future
With research advances
and a better understanding of lupus, the prognosis for
people with lupus today is far brighter than it was even
20 years ago. It is possible to have lupus and remain
active and involved with life, family, and work. As
current research efforts unfold, there is continued hope
for new treatments; improvements in quality of life; and
ultimately, a way to prevent or cure the disease. The
research efforts of today may yield the answers of
tomorrow, as scientists continue to unravel the mysteries
of lupus.
Additional
Resources
Lupus Foundation of
America (LFA), Inc.
1300 Piccard Drive, Suite 200
Rockville, MD 20850
(301) 670-9292
(800) 558-0121
or your local chapter,
listed in the telephone directory
Web address:
http://www.lupus.org/lupus
This is the main voluntary
organization devoted to lupus. The LFA assists local
chapters in providing services to people with lupus,
works to educate the public about lupus, and supports
lupus research. Through a network of more than 500
branches and support groups, the chapters provide
education through information and referral services,
health fairs, newsletters, publications, and seminars.
Chapters provide support to people with lupus, their
families, and friends through support group meetings,
hospital visits, and telephone help lines.
Acknowledgments
The NIAMS gratefully
acknowledges the assistance of Patricia A. Fraser, M.D.,
Brigham and Womens Hospital, Boston, Massachusetts;
John H. Klippel, M.D., NIAMS, NIH; Michael D. Lockshin,
M.D., Barbara Volcker Center for Women and Rheumatic
Disease, Hospital for Special Surgery, New York, New
York; and Rosalind Ramsey-Goldman, M.D., Dr.P.H.,
Northwestern University Medical School, Chicago,
Illinois, in the preparation and review of this
publication. Special thanks also go to Cheryl Yarboro,
R.N., B.S.P.A., NIAMS, NIH, and to the many patients who
reviewed this publication and provided valuable input.
This booklet was written by Debbie Novak of Johnson,
Bassin and Shaw, Inc.
About NIAMS and
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National Arthritis and
Musculoskeletal and Skin Diseases
Information Clearinghouse
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1 AMS Circle
Bethesda, MD 20892-3675
The text of the booklet is
also available 24 hours a day by fax. Using the phone on
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The National Arthritis and
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information sources. The NIAMS, a part of the National
Institutes of Health (NIH), leads the Federal medical
research effort in arthritis and musculoskeletal and skin
diseases. The NIAMS supports research and research
training throughout the United States as well as on the
NIH campus in Bethesda, Maryland, and disseminates health
and research information. Additional information and
research updates can be found on the NIAMS Web site at
http://www.nih.gov/niams/
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