Hereditary Angioedema

13 min read

Hereditary angioedema (HAE) is a rare, inherited disorder that causes episodes of swelling in different parts of the body. It is caused by a deficiency or malfunction of a protein called C1 esterase inhibitor (C1-INH). HAE is a genetic disorder that is passed down through families. It affects both males and females and can occur at any age.

Causes of Hereditary Angioedema

HAE is caused by a genetic mutation that affects the production of C1-INH. This protein helps regulate the activity of certain enzymes in the body that are involved in inflammation. When C1-INH is deficient or not functioning properly, these enzymes become overactive and cause episodes of swelling.

Diagnosis of Hereditary Angioedema

HAE is diagnosed based on a person’s medical history, physical examination, and laboratory tests. Blood tests can be used to measure the levels of C1-INH in the body. Genetic testing can also be used to identify the specific mutation that is causing the disorder.

Complications of Hereditary Angioedema

HAE can cause serious complications, including airway obstruction, which can be life-threatening. Other complications include abdominal pain, nausea, vomiting, and skin infections. People with HAE may also experience psychological distress due to the unpredictable nature of the disorder.

Prevention of Hereditary Angioedema

There is no known way to prevent HAE. However, people with the disorder can take steps to reduce the frequency and severity of episodes. These include avoiding triggers such as stress and certain medications, and taking medications to prevent or reduce swelling.

Take the Hereditary Angioedema Assessment

Symptoms

Swelling

The most common symptom of HAE is swelling, which can occur in different parts of the body. Swelling can affect the hands, feet, face, and airway. Swelling of the hands and feet can cause pain and discomfort. Swelling of the face can cause facial disfigurement and difficulty breathing. Swelling of the airway can be life-threatening if it becomes blocked.

Abdominal Pain

HAE can also cause abdominal pain, which can range from mild to severe. Abdominal pain can be accompanied by nausea and vomiting. In some cases, abdominal pain can be a sign of a more serious complication, such as a bowel obstruction.

Other Symptoms

Other symptoms of HAE can include fatigue, fever, and joint pain. In some cases, HAE can cause anemia, which can lead to fatigue and weakness. HAE can also cause joint pain, which can be a sign of inflammation.

When to See a Doctor

If you experience any of the symptoms of HAE, it is important to see a doctor as soon as possible. Your doctor can diagnose HAE and recommend treatment options to help manage your symptoms. Treatment options may include medications, lifestyle changes, and surgery.

Causes

Genetic Mutations

HAE is caused by a mutation in the SERPING1 gene, which is responsible for producing the C1-INH protein. This mutation can be inherited from either parent, and it is estimated that 1 in 10,000 to 1 in 50,000 people have the disorder. There are three types of HAE, each caused by a different mutation in the SERPING1 gene. Type I is the most common, and it is caused by a mutation that results in a decrease in the amount of C1-INH protein produced. Type II is caused by a mutation that results in a dysfunctional C1-INH protein, and Type III is caused by a mutation that results in an increase in the amount of C1-INH protein produced.

Risk Factors

HAE is an inherited disorder, so the primary risk factor is having a family history of the disorder. People with a family history of HAE are more likely to develop the disorder, and they should be tested for the SERPING1 gene mutation. Additionally, people with a family history of HAE should be aware of the signs and symptoms of the disorder, as early diagnosis and treatment can help reduce the severity of the episodes.

Conclusion

Hereditary angioedema is a rare genetic disorder caused by a mutation in the SERPING1 gene, which is responsible for producing the C1-INH protein. The mutation can be inherited from either parent, and it is estimated that 1 in 10,000 to 1 in 50,000 people have the disorder. The primary risk factor for HAE is having a family history of the disorder, so people with a family history should be tested for the SERPING1 gene mutation and be aware of the signs and symptoms of the disorder.

Getting a Diagnosis

Medical History

The doctor will ask questions about the patient’s family history, including whether any family members have had similar episodes of swelling. The doctor will also ask about the patient’s symptoms, such as when the episodes of swelling occur, how long they last, and what treatments have been tried.

Physical Examination

The doctor will examine the patient for signs of swelling, such as puffiness around the eyes, lips, or hands. The doctor may also check for signs of airway obstruction, such as difficulty breathing or wheezing.

Laboratory Tests

The doctor may order blood tests to measure levels of C1-esterase inhibitor, a protein that helps regulate the immune system. Low levels of this protein can indicate HAE. The doctor may also order genetic tests to look for mutations in the genes that cause HAE.

Conclusion

Diagnosis of HAE is based on a combination of medical history, physical examination, and laboratory tests. If you or a family member have symptoms of HAE, it is important to see a doctor for an accurate diagnosis and treatment.

Questions for Your Doctor

Symptoms

Discuss any new or worsening symptoms you may be experiencing. This includes any swelling, pain, or other changes in your body. Your doctor may want to adjust your treatment plan if your symptoms are getting worse.

Treatment Plan

Your doctor may want to adjust your treatment plan if your symptoms are getting worse. Talk to your doctor about any changes in your lifestyle that may be affecting your HAE, such as changes in diet, exercise, or stress levels. Your doctor may also want to discuss any medications you are taking and whether they are helping to manage your symptoms.

Risk Factors

Discuss any risk factors that may be increasing your chances of having an HAE attack. This includes any family history of HAE, any recent illnesses or injuries, and any changes in your lifestyle. Your doctor may want to adjust your treatment plan if any of these risk factors are present.

Follow-up Appointments

Discuss any follow-up appointments that may be necessary. Your doctor may want to monitor your condition more closely if your symptoms are getting worse or if you are at an increased risk of having an HAE attack. Make sure to schedule any follow-up appointments that your doctor recommends.

Questions and Concerns

Make sure to ask your doctor any questions or voice any concerns you may have about your condition. Your doctor is there to help you manage your HAE and should be able to answer any questions you may have.

Treatment

Medications

Medications are the most common treatment for HAE. These medications can be used to prevent attacks or to treat them when they occur. Common medications used to treat HAE include:

  • C1-inhibitor (C1-INH) concentrates: These medications are used to replace the missing C1-INH protein in the body. They can be used to prevent or treat attacks.
  • Antifibrinolytics: These medications are used to prevent attacks by blocking the breakdown of blood clots. They can also be used to treat attacks.
  • Androgens: These medications are used to increase the production of C1-INH in the body. They can be used to prevent or treat attacks.
  • Kallikrein inhibitors: These medications are used to block the production of bradykinin, a substance that causes swelling. They can be used to prevent or treat attacks.

Lifestyle Changes

Making lifestyle changes can help reduce the frequency and severity of HAE attacks. These changes include avoiding triggers, such as stress, certain foods, and certain medications. It is also important to get enough rest and exercise regularly.

Surgery

In some cases, surgery may be recommended to treat HAE. Surgery can be used to remove the affected tissue or to repair damaged tissue. Surgery is usually only recommended if other treatments have not been successful.

Conclusion

Treatment for HAE is aimed at reducing the frequency and severity of attacks, as well as preventing complications. There are several treatments available for HAE, including medications, lifestyle changes, and surgery. It is important to talk to your doctor about the best treatment plan for you.

Drugs & Medications

Medications for Hereditary Angioedema

There are several medications that can be used to treat HAE. These include:

  • C1-INH replacement therapy: This therapy replaces the missing C1-INH protein in the body. It is given as an injection or infusion.
  • Antifibrinolytic drugs: These drugs help to reduce the amount of swelling by blocking the breakdown of blood clots.
  • Non-steroidal anti-inflammatory drugs (NSAIDs): These drugs help to reduce inflammation and pain.
  • Androgens: These hormones can help to reduce the frequency and severity of HAE attacks.

Lifestyle Changes for Hereditary Angioedema

In addition to medications, there are several lifestyle changes that can help to reduce the frequency and severity of HAE attacks. These include:

  • Avoiding triggers: Triggers for HAE attacks can include stress, certain foods, and certain medications. It is important to identify and avoid triggers.
  • Eating a healthy diet: Eating a balanced diet can help to reduce inflammation and improve overall health.
  • Getting enough rest: Getting enough rest can help to reduce stress and improve overall health.
  • Exercising regularly: Regular exercise can help to reduce stress and improve overall health.

Other Therapies for Hereditary Angioedema

In addition to medications and lifestyle changes, there are several other therapies that can be used to treat HAE. These include:

  • Plasma exchange: This therapy involves removing the plasma from the blood and replacing it with a solution. It can help to reduce the severity of HAE attacks.
  • Immunomodulators: These drugs help to reduce inflammation and improve the body’s response to HAE attacks.
  • Gene therapy: This therapy involves introducing a gene into the body that can help to reduce the severity of HAE attacks.

Hereditary angioedema is a rare genetic disorder that can cause episodes of swelling in the face, hands, feet, and other parts of the body. Treatment for HAE includes medications, lifestyle changes, and other therapies. It is important to work with a doctor to find the best treatment plan for you.

Diet

What to Eat

When living with HAE, it is important to eat a balanced diet that is rich in fruits, vegetables, whole grains, and lean proteins. Eating a variety of foods can help ensure that you are getting all the essential nutrients your body needs. Here are some specific foods to include in your diet:

  • Fruits and vegetables: Fruits and vegetables are packed with vitamins, minerals, and antioxidants that can help reduce inflammation and boost your immune system. Aim to eat a variety of colors and types of produce each day.
  • Whole grains: Whole grains are a great source of fiber, which can help reduce inflammation and improve digestion. Examples of whole grains include oats, quinoa, brown rice, and barley.
  • Lean proteins: Lean proteins such as fish, chicken, and beans are a great source of essential amino acids. Eating lean proteins can help reduce inflammation and keep your energy levels up.
  • Healthy fats: Healthy fats such as olive oil, avocados, and nuts can help reduce inflammation and provide your body with essential fatty acids. Aim to include a small amount of healthy fats in your diet each day.

What to Avoid

In addition to eating a healthy diet, it is also important to avoid certain foods that can trigger inflammation and worsen HAE symptoms. Here are some foods to avoid:

  • Processed foods: Processed foods such as chips, crackers, and cookies are often high in unhealthy fats and added sugars, which can trigger inflammation and worsen HAE symptoms.
  • Refined carbohydrates: Refined carbohydrates such as white bread, pasta, and rice are low in fiber and can cause blood sugar spikes, which can worsen HAE symptoms.
  • Sugary drinks: Sugary drinks such as soda, energy drinks, and fruit juices are high in added sugars and can trigger inflammation and worsen HAE symptoms.
  • Alcohol: Alcohol can trigger inflammation and worsen HAE symptoms. If you choose to drink, do so in moderation.

Conclusion

Eating a healthy diet is an important part of managing the symptoms of hereditary angioedema. Eating a variety of fruits, vegetables, whole grains, and lean proteins can help reduce inflammation and boost your immune system. It is also important to avoid processed foods, refined carbohydrates, sugary drinks, and alcohol, as these can trigger inflammation and worsen HAE symptoms.

Lifestyle

1. Avoid Triggers

Certain triggers can cause an HAE episode, so it is important to identify and avoid them. Common triggers include stress, certain medications, and certain foods. Keeping a diary of your symptoms and activities can help you identify potential triggers.

2. Eat a Healthy Diet

Eating a healthy diet can help reduce the frequency and severity of HAE episodes. Eating a balanced diet that includes plenty of fruits, vegetables, and lean proteins can help keep your body healthy and reduce inflammation. Avoiding processed foods and foods high in sugar can also help reduce inflammation.

3. Exercise Regularly

Regular exercise can help reduce stress and inflammation, which can help reduce the frequency and severity of HAE episodes. Aim for at least 30 minutes of moderate exercise, such as walking, jogging, or swimming, five days a week.

4. Get Enough Sleep

Getting enough sleep is important for overall health and can help reduce the frequency and severity of HAE episodes. Aim for seven to nine hours of sleep each night.

5. Manage Stress

Stress can trigger HAE episodes, so it is important to find ways to manage stress. Relaxation techniques such as yoga, meditation, and deep breathing can help reduce stress. Talking to a therapist or counselor can also help you manage stress.

6. Talk to Your Doctor

It is important to talk to your doctor about your HAE and any lifestyle changes you are considering. Your doctor can help you develop a plan to manage your condition and reduce the frequency and severity of episodes.