Autoimmune Polyendocrine Syndrome Type 1

Autoimmune Polyendocrine Syndrome Type 1 is a rare genetic disorder that affects multiple hormone-producing glands in your body. It happens when your immune system mistakenly attacks your own endocrine glands. These glands make hormones that control important body functions like growth, metabolism, and stress response.

This condition typically appears in childhood, often before age 10. It follows a pattern called autosomal recessive inheritance. This means a child must inherit two copies of the altered gene, one from each parent, to develop the condition. The syndrome is also known as APS-1 or APECED, which stands for autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy.

APS-1 usually involves three main features. These include chronic yeast infections, underactive parathyroid glands, and adrenal insufficiency. Not everyone with APS-1 develops all three features. The condition can affect other organs and glands over time. Early recognition and treatment can help manage symptoms and prevent serious complications.

• Chronic yeast infections in the mouth and nails that keep coming back
• Low calcium levels causing muscle cramps, tingling, or seizures
• Extreme fatigue and weakness that doesn't improve with rest
• Weight loss despite eating normally
• Low blood pressure and dizziness when standing up
• Salt cravings and dehydration
• Skin changes including darkening or vitiligo
• Dental enamel problems and tooth decay
• Hair loss or thinning in patches
• Delayed puberty or irregular periods

Symptoms usually appear gradually over several years. Many children first develop yeast infections before other signs appear. Some people may have mild symptoms for years before diagnosis. The order and severity of symptoms vary widely from person to person.

APS-1 is caused by mutations in the AIRE gene. This gene helps your immune system learn to recognize your own body tissues as safe. When the AIRE gene doesn't work properly, your immune system produces antibodies that attack your own glands. These antibodies damage the glands over time, reducing their ability to make hormones.

The condition is inherited in an autosomal recessive pattern. Both parents must carry one copy of the mutated gene to pass it to their child. Parents who carry one copy usually don't have symptoms themselves. The condition affects males and females equally. It's more common in certain populations, including people of Finnish, Iranian Jewish, and Sardinian descent. There are no lifestyle or environmental factors that cause APS-1.

Doctors diagnose APS-1 based on clinical symptoms, blood tests, and genetic testing. A diagnosis is typically made when at least two of the three main features are present. Blood tests check hormone levels to see which glands are affected. These may include calcium, cortisol, thyroid hormones, and other endocrine markers.

Antibody testing looks for specific antibodies that attack endocrine glands. Adrenal antibodies can indicate involvement of the adrenal glands. Genetic testing confirms the diagnosis by identifying mutations in the AIRE gene. Talk to a doctor about specialized testing if you or your child has symptoms of APS-1. Early diagnosis helps prevent serious complications from hormone deficiencies.

• Hormone replacement therapy for affected glands, including cortisol for adrenal insufficiency
• Calcium and vitamin D supplements for low parathyroid function
• Antifungal medications to treat and prevent yeast infections
• Thyroid hormone replacement if the thyroid gland is affected
• Sex hormone replacement for delayed or absent puberty
• Regular monitoring of hormone levels and organ function
• Emergency medical identification jewelry for adrenal crisis prevention
• Working with an endocrinologist who specializes in hormone disorders
• Genetic counseling for affected families planning to have children
• Dental care to address enamel problems and prevent cavities