An Australian study has found a potential link between autoimmune disease and attention deficit hyperactivity disorder (ADHD).
The study took place over a decade, from 2000 to 2010, following more than 63,000 children born at full-term in New South Wales, Australia. Study author Timothy Nielsen, a PhD candidate at the University of Sydney, said that they were able to identify 12,610 mothers who had one or more of 35 common autoimmune diseases, such as type 1 diabetes, celiac disease, Crohn’s, psoriasis, multiple sclerosis, lupus, Sjogren’s or rheumatoid arthritis, to name a few. The children were identified as having a diagnosis of ADHD, or a prescription for stimulants.
The study also included a meta-analysis of existing research on this topic. The combined results of the longitudinal study and the meta-analysis found that when the mother had a diagnosis of any autoimmune disease, [this was] associated with a higher risk of ADHD in their child at later ages.
While researchers don’t know the exact reason why women with autoimmune disorders are more likely to have children with ADHD, researchers do have a hypothesis. It’s believed that maternal autoantibodies, which attack the mother’s own tissues, cross the placenta into the unborn fetus during pregnancy. Inflammatory molecules, therefore, could potentially do the same. These molecules could, in turn, alter fetal brain development, either by altering epigenetic markers, which turn certain genes on or off, or by impacting the function and formation of synapses, which allow nerve cells to communicate.
Nielsen explained, “These changes may lead directly to ADHD symptoms, or they may make the child more vulnerable to environmental risk factors.” He continued, “Our team is currently working on research into the causal mechanisms that underlie the association between autoimmune disease and ADHD, which may shed light on whether the severity of disease, symptoms, use of medications or other inflammatory factors modifies the risk of ADHD.”
This is the first study that explores the correlation between maternal autoimmune disease and the risk of ADHD in children. Other research has shown a link between autoimmune disease in mothers and other neurodevelopmental disorders, such as autism, obsessive-compulsive disorder (OCD), tics and Tourette’s syndrome.
According to the Scleroderma Foundation, scleroderma is a chronic connective tissue disease, and is generally classified as a rheumatic autoimmune disease. In patients with scleroderma, the body over-produces collagen, reacting as if there were an injury needing repair. This over-production of collagen prevents various organs in the body from functioning normally.
While this condition is poorly understood, there is some information about the disease that we do know. Read on to learn 10 facts about scleroderma.
1. Scleroderma is more common than you think
It’s estimated that 300,000 Americans live with scleroderma. Of these 300,000 patients, approximately 1/3 live with the systemic form of the disease. However, it’s possible that the number of scleroderma patients is actually much higher, since diagnosing this skin condition can be difficult, as the disorder bears a lot of similarities to other autoimmune diseases, such as polymyositis.
2. Localized scleroderma is the first main type
The two main types of scleroderma are localized and systemic. With localized scleroderma, symptoms such as skin thickening and collagen overproduction are limited to a few places on the skin or muscles, and internal organs are usually not affected. In general, localized scleroderma is relatively mild and rarely develops into systemic scleroderma.
Morphea and linear scleroderma are two sub-classifications of this form of the disease, which appear as patches or streaks on the skin, respectively.
3. Systemic scleroderma is the second main type
In contrast to localized scleroderma, systemic scleroderma affects the connective tissue in many parts of the body, including the skin, esophagus, gastrointestinal tract (stomach and bowels), lungs, kidneys, heart, and other internal organs. It can even impact blood vessels, muscles, and joints. These tissues become hard and fibrous, which decreases their function.
There are two sub-classifications of systemic scleroderma – diffuse and limited. Diffuse scleroderma results in a rapid skin thickening across a larger portion of the skin. Patients with this form of the disease have more internal organ involvement as well. Conversely, limited scleroderma occurs when the skin thickening is less widespread, and is usually confined to the fingers, hands and face. It tends to develop slowly over time.
4. Limited scleroderma is also called CREST syndrome
Limited scleroderma is sometimes referred to as CREST syndrome, an acronym which stands for the different symptoms this condition causes:
Calcinosis – an accumulation of calcium deposits under the skin, which may cause pain
Raynaud’s – a phenomenon in which small arteries that supply blood to the skin constrict excessively in response to cold, limiting blood supply to one’s fingers and toes and changing their color
Esophageal dysfunction – a stiffening of the gastrointestinal tract muscles, resulting in reflux and indigestion
Sclerodactyly – the hardening of the skin on one’s fingers and/or toes
Telangiectasias – round, red spots on the skin’s surface as a result of widened small blood vessels
5. Scleroderma can affect one’s lungs
Pulmonary symptoms can occur in patients with systemic scleroderma. For example, patients may develop pulmonary hypertension, a condition in which the lung’s blood vessels narrow, which results in impaired blood flow in the lungs. This, in turn, causes shortness of breath.
6. Your gender, age, ethnicity and genetics may play a role
Scleroderma affects women up to three to four times more frequently than their male counterparts. According to the Mayo Clinic, the condition most commonly occurs between the ages of 30 and 50, although children can also develop the disease. One’s ethnic background may also influence the risk of developing the disease, the age of onset, and the severity of one’s symptoms. Although it’s believed that genetics play a role in the development of scleroderma, genetic factors are thought to only predispose a person to the disease, rather than cause it.
7. Other autoimmune issues may co-occur
Since scleroderma is an autoimmune disease, it may occur in conjunction with other autoimmune issues. According to the Mayo Clinic, between 15-20% of scleroderma patients have another autoimmune disease, such as rheumatoid arthritis, lupus or Sjogren’s syndrome. This is why it’s important for patients to get evaluated for other potential co-morbidities as well.
8. There is no cure, but treatments do exist
While there is no known cure for scleroderma, treatment options do exist to help patients manage their symptoms and to prevent further complications of the disease. For example, your doctor may prescribe steroids to help you cope with skin symptoms. Blood pressure medications may also be used to treat Raynaud’s phenomenon. Anti-acids and antibiotics can help reduce digestive issues and prevent infections. Immunosuppressants may be prescribed to reduce overactivity of your immune system and to decrease damaging inflammation. And finally, pain medications may also be used to decrease pain if over-the-counter pain medications aren’t effective enough.
9. Surgery may be necessary
In extreme cases, surgery may be required for certain scleroderma patients. For example, patients with severe Raynaud’s phenomenon in their fingers or toes may have tissues that die off or develop painful sores; consequently, amputation of these tissues may be required. Also, in patients with heavy lung involvement, a lung transplant may be necessary to help the patient breathe.
10. Scleroderma support groups are here to help
The Scleroderma Foundation offers numerous local chapters and support groups, designed to help patients connect with others living with the disease. These support groups provide a forum to share feelings, concerns, information with others, and act as a place to offer peer support and encouragement. To find your local support group in the US, visit the scleroderma chapter locator.
Do you or someone you love suffer from scleroderma? What has been your experience living with the disease? Let us know in the comments below!
According to the National Organization for Rare Disease, Congenital Heart Block, or CHB for short, is the interference of the transfer of electric nerve impulses that regulate the pumping of the heart muscle.
As long as electrical impulses are transmitted normally between the heart’s chambers – the atria and the ventricles – the heart contracts normally, allowing for blood to be pumped throughout the body. If the transmission of the signal is impeded, the blocked electrical transmission is known as heart block, or atrioventricular (AV) block.
Though heart block can happen to anyone of any age, it is called congenital heart block if it occurs in a fetus or newborn up to 28 days old.
Why Does CHB Occur in Children Born to Women with Autoimmune Disease?
Autoimmune-associated CHB has been found in a variety of maternal autoimmune disorders, including Sjogren’s syndrome, systemic lupus erythematosus, rheumatoid arthritis, antiphospholipid syndrome (APS), mixed connective tissue disorders, and undifferentiated connective tissue disease.
It is believed that CHB may result when maternal antibodies cross the placenta, enter the fetus, and attack the fetal cardiac conduction system. The antibodies that were originally produced by the mother’s body to fight infections mistakenly recognize parts of the fetal heart’s conduction system as foreign; for this reason, the immune system attacks and damages the tissues, resulting in inflammation and scarring, which in turn leads to faulty conduction.
What Is the Risk of Congenital Heart Block if I Have an Autoimmune Disease?
A 2017 study conducted by Chinese medical professionals Kai-Yu Zhou and Yi-Min Hua of the West China Second University Hospital, Department of Pediatric Cardiology, revealed that more than half of CHB cases (between 60 and 90%) are associated with maternal autoimmune disease.
Among the general population, CHB occurs in 1 out of every 20,000 live births – an incidence of only 0.00005%. The study found that autoimmune-associated CHB, however, occurs at much more frequent rates, affecting between 2–5% pregnancies with positive anti-Ro/SSA and La/SSB antibodies. The study also found that when a woman had a child with CHB, the recurrence rate of CHB was 12–25% for a subsequent pregnancy.
Mortality Rate & Treatment for Congenital Heart Block
If CHB is detected in utero by a fetal electrocardiography (ECG) and echocardiography, your OB/GYN may prescribe an adrenocorticosteroid such as dexamethasone, which works to decrease inflammation and the number of circulating maternal antibodies in the fetus.
Once born, other studies have shown that between that 64 and 70% of CHB survivors require surgery to permanently implant a pacemaker, a medical device which stimulates the heart to contract so that it can pump blood.
How to Prevent Congenital Heart Block
A 2016 report by the American College of Rheumatology states that there are no official guidelines about the prevention, screening, and treatment of CHB due to maternal Ro antibodies.
However, in the same report, it was stated that in a survey of 330 women with autoimmune conditions, 67% were told by their rheumatologists to use hydroxychloroquine (also known as Plaquenil) to prevent CHB. In addition, 62% were told to start the drug prior to pregnancy, in order to prevent the condition from developing.