Journal
PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY
Volume 471, Issue 1, Pages 137-148Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00424-018-2246-5
Keywords
Phosphate metabolism; Hypophosphatemia; Hyperphosphatemia; Nephrolithiasis; Pulmonary alveolar microlithiasis
Categories
Funding
- Department of Veterans Affairs
- University of Louisville School of Medicine
- Swiss National Science Foundation (SNSF) (NCCR Kidney.CH)
- Swiss National Science Foundation (SNSF) [31003A_176125]
- Swiss National Science Foundation (SNF) [31003A_176125] Funding Source: Swiss National Science Foundation (SNF)
Ask authors/readers for more resources
The Na+-dependent phosphate transporter NaPi-IIa (SLC34A1) is mostly expressed in kidney, whereas NaPi-IIb (SLC34A2) has a wider tissue distribution with prominent expression in the lung and small intestine. NaPi-IIa is involved in renal reabsorption of inorganic phosphate (Pi) from urine, and patients with biallelic inactivating mutations in SLC34A1 develop hypophosphatemia, hypercalcemia, hypercalciuria and nephrocalcinosis, and nephrolithiasis in early childhood. Monoallelic mutations are frequent in the general population and may impact on the risk to develop kidney stones in adulthood. SNPs in close vicinity to the SLC34A1 locus associate with the risk to develop CKD. NaPi-IIb mediates high-affinity transport of Pi from the diet and appears to be mostly important during low Pi availability. Biallelic inactivating SLC34A2 mutations are found in patients with pulmonary alveolar microlithiasis, a lung disease characterized by the deposition of microcrystals. In contrast, no evidence for disturbed systemic Pi homeostasis has been reported in these patients to date. Nevertheless, NaPi-IIb-mediated intestinal Pi absorption may be a target for pharmaceutical interventions in patients with chronic kidney disease and Pi overload.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available