Molecular Pathogenesis of Hypophosphatemic Rickets

Hypophosphatemic rickets with hypercalciuria.

Hereditary hypophosphatemic rickets

Hereditary hypophosphatemic rickets (HHR) are a group of diseases characterized by renal phosphate wasting causing growth retardation, rickets and osteomalacia. The most common form is the X-linked dominant hypophosphatemic rickets caused by inactivating mutations in the PHEX gene. The other hereditary hypophosphatemic syndromes present a lower prevalence. These include autosomal dominant hypop...

Hypophosphatemic rickets and osteomalacia.

The hypophosphatemic conditions that interfere in bone mineralization comprise many hereditary or acquired diseases, all of them sharing the same pathophysiologic mechanism: reduction in the phosphate reabsorption by the renal tubuli. This process leads to chronic hyperphosphaturia and hypophosphatemia, associated with inappropriately normal or low levels of calcitriol, causing osteomalacia or ...

Molecular and Biochemical Aspects of Hypophosphatemic Rickets: An Updated Review

Rickets is associated with aberrant mineralization in growth plates leading to the deformity of bone structure. The two main types of rickets are phosphopenic and calcipenic rickets. Phosphopenic rickets is found in a variety of sorts; the most common is the X-linked dominant hypophosphatemic rickets (HR) caused by a mutation in PHEX gene. The FGF23, DMP1, and PHEX are among the most important ...

Case in Point: Hypophosphatemic Rickets

The child had been born to a 19-year-old gravida 2, para 2 mother via cesarean birth secondary to malpresentation and fetal distress. The child weighed 3.06 kg at birth. She currently weighed 6 kg (5th percentile); she was 62 cm tall (5th to 25th percentile); head circumference, 46 cm (95th percentile or higher). Laboratory findings: calcium, 9.7 mg/dL; phosphorus, 2.8 mg/dL, immunoreactive par...