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Antiviral drug
Ibalizumab
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Ibalizumab

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Ibalizumab
Monoclonal antibody
Type Whole antibody
Source Humanized (from mouse)
Target CD4
Clinical data
Trade names Trogarzo
Other names Ibalizumab-uiyk; TMB-355, TNX-355
AHFS/Drugs.com Monograph
MedlinePlus a618020
License data
Routes of
administration		 Intravenous (IV)
ATC code
Legal status
Legal status
Identifiers
CAS Number
DrugBank
ChemSpider
  • none
UNII
KEGG
NIAID ChemDB
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Ibalizumab, sold under the brand name Trogarzo, is a non-immunosuppressive humanised monoclonal antibody that binds CD4, the primary receptor for HIV, and inhibits HIV from entering cells. It is a post-attachment inhibitor, blocking HIV from binding to the CCR5 and CXCR4 co-receptors after HIV binds to the CD4 receptor on the surface of a CD4 cell. Post-attachment inhibitors are a subclass of HIV drugs called entry inhibitors.

On March 6, 2018, the U.S. Food and Drug Administration (FDA) approved ibalizumab for multidrug-resistant HIV-1. It is used in combination with other antiretroviral drugs. The U.S. Food and Drug Administration (FDA) considers it to be a first-in-class medication.

Medical uses

Ibalizumab, in combination with other antiretrovirals, is indicated for the treatment of human immunodeficiency virus type 1 (HIV-1) infection.

Development

Ibalizumab is being developed by TaiMed Biologics but was originally developed by Tanox, now part of Genentech. As part of Genentech's takeover of Tanox, the patent for ibalizumab was sold to TaiMed Biologics, a biotech company formed in 2007 with support from the Taiwanese Government through a $20 million investment by the state-owned National Development Fund.

Milestones for the intravenous (i.v.) infusion dosage form:

  • 2003: completed a phase-1a clinical trial for i.v. infusion dosage form.
  • 2003: granted fast track status by U.S. FDA.
  • 2003: completed a phase-1b clinical trial for i.v. infusion dosage form.
  • 2006: completed a phase-2a clinical trial for i.v. infusion dosage form.
  • 2011: completed a phase-2b clinical trial for i.v. infusion dosage form.
  • 2012: completed a phase-1 clinical trial for s.c. injection dosage form.
  • 2013: initiated a phase-1/2 clinical trial for s.c. and i.m. injection dosage forms (on-going).
  • 2014: granted orphan drug designation for HIV MDR patients by U.S. FDA.
  • 2015: granted breakthrough therapy designation for i.v. infusion dosage form by U.S. FDA.
  • 2015: initiated a phase-3 clinical trial for i.v. infusion dosage form (on-going).
  • 2016: initiated and intended to complete a rolling BLA submission for i.v. infusion dosage form to U.S. FDA.
  • 2016: completion of a phase-3 clinical trial for i.v. infusion dosage form
  • 2017: completion of BLA submission and pre-approval inspection for i.v. infusion dosage form to U.S. FDA
  • 2018: U.S. market approval (trade name: Trogarzo)

In a Phase III trial with 48 weeks of follow-up, HIV patients with multi-drug resistance tolerated ibalizumab well in combination with other treatments, and 59% of patients achieved viral suppression.

External links

  • "Ibalizumab". Drug Information Portal. U.S. National Library of Medicine.

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