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| Trade names | Nulibry |
| Other names | Precursor Z, ALXN1101 |
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| Routes of administration | Intravenous |
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| Formula | C10H14N5O8P |
| Molar mass | 363.223 g·mol−1 |
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Fosdenopterin (or cyclic pyranopterin monophosphate, cPMP), sold under the brand name Nulibry, is a medication used to reduce the risk of death due to a rare genetic disease known as molybdenum cofactor deficiency type A. [2]
The most common side effects include complications related to the intravenous line, fever, respiratory infections, vomiting, gastroenteritis, and diarrhea. [2]
Fosdenopterin was approved for medical use in the United States in February 2021, [4] It is the first medication approved by the U.S. Food and Drug Administration (FDA) for the treatment of molybdenum cofactor deficiency type A. [2] and in the European Union in September 2022. [3] The US Food and Drug Administration considers it to be a first-in-class medication. [5]
Fosdenopterin is indicated to reduce the risk of mortality in people with molybdenum cofactor deficiency (MoCD) type A. [1] [2]
People with molybdenum cofactor deficiency type A cannot produce cyclic pyranopterin monophosphate (cPMP) in their body. [2] Fosdenopterin is an intravenous medication that replaces the missing cPMP. [2] [6] cPMP is a precursor to molybdopterin, which is required for the enzyme activity of sulfite oxidase, xanthine dehydrogenase/oxidase and aldehyde oxidase. [7]
Fosdenopterin was developed at the German universities TU Braunschweig and the University of Cologne. [8] [9]
The effectiveness of fosdenopterin for the treatment of MoCD-A was demonstrated in thirteen treated participants compared to eighteen matched, untreated participants. [2] [10] The participants treated with fosdenopterin had a survival rate of 84% at three years, compared to 55% for the untreated participants. [2]
The U.S. Food and Drug Administration (FDA) granted the application for fosdenopterin priority review, breakthrough therapy, and orphan drug designations along with a rare pediatric disease priority review voucher. [2] [5] The FDA granted the approval of Nulibry to Origin Biosciences, Inc., in February 2021. [2]
On 21 July 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 marketing authorization under exceptional circumstances for the medicinal product Nulibry, intended for the treatment of patients with molybdenum cofactor deficiency (MoCD) Type A. [11] The applicant for this medicinal product is Comharsa Life Sciences Ltd. [11] Fosdenopterin was approved for medical use in the European Union in September 2022. [3] [12]