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Recent progress in drug development for fibrodysplasia ossificans progressiva

Xinmiao Meng1, Haotian Wang2, Jijun Hao3

  • 1College of Arts and Sciences, Cornell University, Ithaca, NY, 14850, USA.

Molecular and Cellular Biochemistry
|May 10, 2022
PubMed

Insights

Fibrodysplasia Ossificans Progressiva (FOP) is a rare genetic disorder. Recent drug development offers hope, focusing on small-molecule and antibody therapies targeting abnormal bone growth.

Area of Science:

  • Genetics and Molecular Biology
  • Rheumatology and Orthopedics

Background:

  • Fibrodysplasia Ossificans Progressiva (FOP) is a rare genetic disorder characterized by progressive heterotopic ossification.
  • It results from mutations in the Activin A receptor type I (ALK2) gene, leading to abnormal Bone Morphogenetic Protein (BMP) signaling.

Purpose of the Study:

  • To review recent advancements in understanding FOP's molecular mechanisms.
  • To summarize the current landscape of FOP drug development, including clinical trials.

Main Methods:

  • Literature review of recent research on FOP pathogenesis.
  • Analysis of ongoing clinical trials for small-molecule and antibody-based FOP therapies.

Main Results:

  • Activin A abnormally activates BMP signaling via mutant ALK2 in FOP, driving heterotopic bone formation.
  • Several small-molecule inhibitors and therapeutic antibodies targeting this pathway are in clinical development.

Conclusions:

  • Understanding FOP's molecular basis has accelerated drug discovery efforts.
  • Clinical trials are evaluating promising new therapies for FOP, offering potential treatment options.
Keywords:
ACVR1ALK2BMPFibrodysplasia ossificans progressivaHeterotopic ossificationTGF-β

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