Abstract
Hypophosphatasia (HPP) is a rare genetic disease, characterized by the defective production of tissue-non-specific alkaline phosphatase (TNSALP). Six subtypes of the disease – affecting neonates (beginning in utero), infants, children, or adults – are recognized: perinatal lethal, prenatal benign, infantile, childhood, adult, and odontohypophosphatasia. The clinical presentation of these subtypes is very different and the severity ranges from mild to lethal. This chapter, after an overview of the genetics, epidemiology, classification, and clinical presentation of the different forms of HPP, will review the current experience with enzyme replacement therapy (ERT).
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Abbreviations
- ALP:
-
Alkaline phosphatase
- BMD:
-
Bone mineral density
- BSALP:
-
Bone-specific alkaline phosphatase
- CPAP:
-
Continuous positive airway pressure
- DXA:
-
Dual-energy X-ray absorptiometry
- ERT:
-
Enzyme replacement therapy
- GABA:
-
Gamma-aminobutyric acid
- HPP:
-
Hypophosphatasia
- NPP1:
-
Nucleoside pyrophosphohydrolase-1
- NSAIDs:
-
Non steroidal anti-inflammatory drugs
- PEA:
-
Phosphoethanolamine
- PHOSPHO1:
-
Phosphatase orphan 1
- Pi:
-
Inorganic phosphate
- PL:
-
Pyridoxal
- PLP:
-
Pyridoxal-5′-phosphate
- PPi:
-
Inorganic pyrophosphate
- PTH:
-
Parathyroid hormone
- RGI-C:
-
Radiographic global impression of change
- TNSALP:
-
Tissue-non-specific alkaline phosphatase
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Bianchi, M.L., Vai, S. (2019). Alkaline Phosphatase Replacement Therapy. In: Labrou, N. (eds) Therapeutic Enzymes: Function and Clinical Implications. Advances in Experimental Medicine and Biology, vol 1148. Springer, Singapore. https://doi.org/10.1007/978-981-13-7709-9_10
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