4.8 Article

First-in-class humanized FSH blocking antibody targets bone and fat

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NATL ACAD SCIENCES
DOI: 10.1073/pnas.2014588117

关键词

monoclonal antibody; humanization; follicle-stimulating hormone; adipose

资金

  1. National Institutes of Health [U19 AG60917, R01 DK113627]
  2. Maria I. New Children's Hormone Research Foundation

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Blocking the action of FSH genetically or pharmacologically in mice reduces body fat, lowers serum cholesterol, and increases bone mass, making an anti-FSH agent a potential therapeutic for three global epidemics: obesity, osteoporosis, and hypercholesterol-emia. Here, we report the generation, structure, and function of a first-in-class, fully humanized, epitope-specific FSH blocking antibody with a KD of 7 nM. Protein thermal shift, molecular dynamics, and fine mapping of the FSH-FSH receptor interface confirm stable binding of the Fab domain to two of five receptor interacting residues of the FSH beta subunit, which is sufficient to block its interaction with the FSH receptor. In doing so, the humanized antibody profoundly inhibited FSH action in cell-based assays, a prelude to further preclinical and clinical testing.

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