Etranacogene dezaparvovec

Etranacogene dezaparvovec
Gene therapy
Target geneFactor IX
VectorAdeno-associated virus
Nucleic acid typeDNA
Delivery methodIntravenous
Clinical data
Trade namesHemgenix
Other namesAMT-061, etranacogene dezaparvovec-drlb
License data
Routes of
administration		Intravenous infusion
ATC code
  • None
Legal status
Legal status
Identifiers
CAS Number
DrugBank
UNII
KEGG

Etranacogene dezaparvovec, sold under the brand name Hemgenix is a gene therapy used for the treatment of hemophilia B.[1][2][3] Etranacogene dezaparvovec is an adeno-associated virus vector-based gene therapy which consists of a viral vector carrying a gene for clotting Factor IX.[3] The gene is expressed in the liver to produce Factor IX protein, to increase blood levels of Factor IX and thereby limit bleeding episodes.[3] Hemophilia B is a genetic bleeding disorder resulting from missing or insufficient levels of blood clotting Factor IX, a protein needed to produce blood clots to stop bleeding.[3]

The most common adverse reactions include liver enzyme elevations, headache, mild infusion-related reactions and flu-like symptoms.[3][4]

Etranacogene dezaparvovec was approved for medical use in the United States in November 2022,[2][3][5] and in the European Union in February 2023.[4]

Medical uses

Etranacogene dezaparvovec is indicated for the treatment of adults with hemophilia B (congenital Factor IX deficiency) who use Factor IX prophylaxis therapy, or have current or historical life-threatening hemorrhage, or have repeated, serious spontaneous bleeding episodes.[3]

History

The safety and effectiveness of etranacogene dezaparvovec were evaluated by the US Food and Drug Administration (FDA) in two studies of 57 adult men 18 to 75 years of age with severe or moderately severe hemophilia B.[3] Effectiveness was established based on decreases in the men's annualized bleeding rate (ABR).[3] In one study, which had 54 participants, the subjects had increases in Factor IX activity levels, a decreased need for routine Factor IX replacement prophylaxis, and a 54% reduction in ABR compared to baseline.[3]

The FDA granted the application for etranacogene dezaparvovec priority review, orphan drug, and breakthrough therapy designations.[3] In November 2022, the FDA granted approval of Hemgenix to CSL Behring LLC.[3]

Society and culture

Economics

Etranacogene dezaparvovec costs US$3.5 million per dose. The manufacturer claims that the drug will reduce total health care costs because patients will have fewer bleeding incidents and need fewer clotting treatments.[6]

On 15 December 2022, the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) adopted a positive opinion, recommending the granting of a conditional marketing authorization for the medicinal product Hemgenix, intended for the treatment of severe and moderately severe hemophilia B.[7] The applicant for this medicinal product is CSL Behring GmbH.[7] Etranacogene dezaparvovec was approved for medical use in the European Union in February 2023.[4][8]

References

  1. 1 2 "Hemgenix- etranacogene dezaparvovec kit". DailyMed. 13 January 2023. Retrieved 21 January 2023.
  2. 1 2 3 "Hemgenix". U.S. Food and Drug Administration (FDA). 22 November 2022. Retrieved 22 November 2022.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 "FDA Approves First Gene Therapy to Treat Adults with Hemophilia B". U.S. Food and Drug Administration (FDA) (Press release). 22 November 2022. Retrieved 22 November 2022. Public Domain This article incorporates text from this source, which is in the public domain.
  4. 1 2 3 4 "Hemgenix EPAR". European Medicines Agency (EMA). 9 December 2022. Retrieved 3 March 2023. Text was copied from this source which is copyright European Medicines Agency. Reproduction is authorized provided the source is acknowledged.
  5. ↑ "U.S. Food and Drug Administration approves CSL's Hemgenix (etranacogene dezaparvovec-drlb), the first gene therapy for hemophilia B". CSL (Press release). 22 November 2022. Retrieved 22 November 2022.
  6. ↑ "FDA approves most expensive drug ever, a $3.5 million-per-dose gene therapy for hemophilia B". CBS News. Retrieved 23 November 2022.
  7. 1 2 "Hemgenix: Pending EC decision". European Medicines Agency (EMA). 15 December 2022. Retrieved 16 December 2022. Text was copied from this source which is copyright European Medicines Agency. Reproduction is authorized provided the source is acknowledged.
  8. ↑ "Hemgenix Product information". Union Register of medicinal products. 23 February 2023. Retrieved 3 March 2023.

Further reading

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