How does Tezepelumab work for severe asthma?

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I read your query and can understand your concern.

Tezepelumab is indeed a promising treatment option for severe asthma (chronic inflammatory airway disease).

How Tezepelumab works?

Tezepelumab is a monoclonal antibody (a lab-engineered protein that mimics immune system functions) that targets thymic stromal lymphopoietin (TSLP), a protein that triggers airway inflammation in asthma). By blocking TSLP, Tezepelumab helps reduce inflammation (swelling and irritation of the airways), airway hyperresponsiveness (overreaction of airways to triggers), and asthma symptoms.

Potential benefits

1. Reduced asthma exacerbations (flare-ups or worsening of symptoms): Tezepelumab has been shown to significantly lower the frequency of asthma attacks.
2. Improved lung function: Tezepelumab may enhance lung performance, as measured by forced expiratory volume in 1 second (FEV1, a test that measures how much air you can forcefully exhale in one second).
3. Reduced oral corticosteroid use: Tezepelumab may help decrease dependence on oral corticosteroids, which are often used to control severe asthma but can have long-term side effects.

Comparison to Dupilumab and Omalizumab:

1. Dupilumab (IL-4Ra inhibitor): Dupilumab blocks Interleukin-4 receptor alpha (IL-4Ra, a key component in allergic inflammation). While both Tezepelumab and Dupilumab reduce asthma exacerbations, Tezepelumab may have a broader impact on the inflammatory response.
2. Omalizumab (IgE inhibitor): Omalizumab targets immunoglobulin E (IgE, an antibody involved in allergic reactions). Tezepelumab may be more effective in reducing asthma exacerbations, especially in severe cases that do not respond well to IgE-targeting therapy.

Potential side effects:

1. Injection site reactions: Redness, swelling, or itching at the injection site.
2. Headache: Mild to moderate headaches may occur.
3. Pharyngitis (sore throat): Some patients may experience throat discomfort.
4. Myalgia (muscle pain): Mild to moderate muscle pain may develop.

Who is a good candidate for Tezepelumab?

1. Severe asthma: Patients who do not achieve adequate control with inhaled corticosteroids and bronchodilators.
2. Eosinophilic asthma (a type of asthma with high levels of eosinophils, a type of white blood cell involved in inflammation): Tezepelumab can help reduce airway inflammation in such patients.
3. Frequent exacerbations: Those experiencing frequent asthma flare-ups despite current treatment.

Recommended tests before starting Tezepelumab:

To ensure proper management and minimize side effects, the following tests are recommended:

1. Complete blood count (CBC): Assesses overall health and checks for infection or inflammation.
2. Erythrocyte sedimentation rate (ESR): Measures inflammation in the body.
3. Immunoglobulin E (IgE) levels: Determines if allergies are a major trigger for asthma.
4. Pulmonary function tests (PFTs): Evaluate lung function and severity of asthma.

Other relevant medical history and test results to personalize treatment recommendations.

I hope this helps.

Revert with the answer to assist further.

Thank you and take care.