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Alpha 1 antitrypsin - CSL Behring

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Drug Profile

Alpha 1 antitrypsin - CSL Behring

Alternative Names: AAT - CSL Behring; Alpha-1 proteinase inhibitor - CSL Behring; Alpha-antitrypsin - CSL Behring; API; API Inhale; CSL 964; Respreeza; Zemaira

Latest Information Update: 06 May 2026

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At a glance

  • Originator CSL Behring
  • Developer Blood and Marrow Transplant Clinical Trials Network; CSL Behring; Nektar Therapeutics
  • Class Acute-phase proteins; Alpha globulins; Anti-inflammatories; Antiallergics; Antihyperglycaemics; Blood proteins; Ear disorder therapies; Enzymes; Secretory proteinase inhibitory proteins; Serpins
  • Mechanism of Action Alpha 1-antitrypsin replacements; Immunomodulators; Serine endopeptidase inhibitors
  • Orphan Drug Status

    Orphan designation is assigned by a regulatory body to encourage companies to develop drugs for rare diseases.

    Yes - Alpha 1-antitrypsin deficiency
  • New Molecular Entity Yes

Highest Development Phases

  • Marketed Alpha 1-antitrypsin deficiency
  • Phase III Graft-versus-host disease

Most Recent Events

  • 19 Mar 2026 CSL Behring completes a phase-II/III clinical trials in Graft-versus-host disease (In adults, In adolescents, In the elderly, Prevention) in USA, Australia, Germany, Italy, Spain, Turkey, South Korea, Japan (IV) (NCT03805789) (EudraCT2018-000329-29)
  • 02 Jan 2024 Preregistration for Alpha 1-antitrypsin deficiency in Puerto Rico, Mexico (IV), prior to January 2024
  • 02 Jan 2024 Registered for Alpha 1-antitrypsin deficiency in Puerto Rico, Mexico (IV), prior to January 2024

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