One of the most pronounced effects of the hormonally active form of vitamin D, 1,25-dihydroxyvitamin D3 (1,25(OH)2D3), is increased synthesis of 25-hydroxyvitamin D3 24-hydroxylase (CYP24A1), the enzyme responsible for the catabolism of 1,25(OH)2D3. Thus, 1,25(OH)2D3 regulates its own metabolism, protecting against hypercalcemia and limiting the levels of 1,25(OH)2D3 in cells. This chapter summarizes the catalytic properties of CYP24A1, the recent data related to the crystal structure of CYP24A1, the findings obtained from the generation of mice deficient for the Cyp24a1 gene as well as recent data identifying a causal role of a genetic defect in CYP24A1 in certain patients with idiopathic infantile hypercalcemia. This chapter also reviews the regulation of renal and placental CYP24A1 as well as the genomic mechanisms, including coactivators, repressors, and epigenetic modification, involved in modulating 1,25(OH)2D3 regulation of CYP24A1. We conclude with future research directions related to this key regulator of 1,25(OH)2D3 catabolism and calcium homeostasis.
Pharmacology, Toxicology and Pharmaceutical Science
3
7%
Agricultural and Biological Sciences
3
7%
Medicine and Dentistry
3
7%
Biochemistry, Genetics and Molecular Biology
2
5%
Nursing and Health Professions
2
5%
Other
6
15%
Unknown
22
54%
Attention Score in Context
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 05 October 2017.
All research outputs
#17,783,561
of 22,842,950 outputs
Outputs from Vitamins & Hormones
#294
of 440 outputs
Outputs of similar age
#267,673
of 393,571 outputs
Outputs of similar age from Vitamins & Hormones
#15
of 25 outputs
Altmetric has tracked 22,842,950 research outputs across all sources so far. This one is in the 19th percentile – i.e., 19% of other outputs scored the same or lower than it.
So far Altmetric has tracked 440 research outputs from this source. They receive a mean Attention Score of 4.5. This one is in the 29th percentile – i.e., 29% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 393,571 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 27th percentile – i.e., 27% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 25 others from the same source and published within six weeks on either side of this one. This one is in the 32nd percentile – i.e., 32% of its contemporaries scored the same or lower than it.
