Burosumab (KRN23) is an entirely human monoclonal IgG1 antibody that binds excess fibroblast growth factor 23 (FGF23) and has been successfully tested in clinical trials in children with X-linked hypophosphatemic rickets .
The U.S. Food and Drug Administration approved Crysvita (burosumab) in April 2018. This is the first drug approved to treat adults and children ages 1 year and older with X-linked hypophosphatemia (XLH), which is a rare, inherited form of rickets. X-linked hypophosphatemia causes low circulating levels of phosphorus in the blood. It causes impaired bone growth and development in children and adolescents and issues with bone mineralization throughout a patient’s life .
XLH is a serious disease which affects about 3,000 children and 12,000 adults in the United States. Most children with XLH suffer from bowed or bent legs, short stature, bone pain and severe dental pain. Some adults with this condition suffer from persistent, unrelenting discomfort and complications, such as joint pain, impaired mobility, tooth abscesses and hearing loss .
This drug is indicated for the treatment of X-linked hypophosphatemia with radiological evidence of bone disease in children of 1 year of age and older and adolescents with growing skeletons .
National Institutes of Health Clinical Center, Bethesda, Maryland, United States
Peking Union Medical College Hospital, Beijing, China
West China Hospital, Sichuan University, Chengdu, China
Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, China
APHP Paris - Assistance Publique Hopitaux de Paris, Paris, France
Hospital General Universitario Santa Lucía, Cartagena, Murcia, Spain
Hospital Universitario Virgen a de las Nieves, Granada, Spain
Peking Union Medical College Hospital, Beijing, China
Nanfang Hospital, Guangzhou, China
The First Medical Center of Chinese People's Liberation Army General Hospital, Beijing, China
Shanghai 6th Hospital, Shanghai, China
Guangzhou Women and Children Medical Center, Guangzhou, China
Peking Union Medical College Hospital, Beijing, China
Clinical Trial Unit, Orthopedic Department, Wuerzburg University, Würzburg, Germany
Hospital Bicetre, Le Kremlin-Bicêtre, France
University of Alabama at Birmingham, Birmingham, Alabama, United States
National University Corporation Osaka University, Suita, Osaka, Japan
The University of Tokyo Hospital, Bunkyō-Ku, Tokyo, Japan
Hokkaido University Hospital, Sapporo, Hokkaido, Japan
Kepler Universitaetsklinikum GmbH, Linz, Austria
Ospedale Pediatrico Bambino Gesù, Rome, Italy
Centre de reference des maladies renales rares-Hospices Civils de Lyon-Hopital Femme Mere Enfant, Lyon, France
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