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Updated: Feb 17, 2026
A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro
Published on: June 2, 2022
Calcitriol Reverses the Down-Regulation Pattern of Tuberous Sclerosis Complex Genes in an In Vitro Calcification
Eraldo Fonseca Dos Santos Junior1, Roberta Rodrigues de Lemos Gitirana1, Darlene Paiva Bezerra1
1Keizo Asami Laboratory, Federal University of Pernambuco, Recife, Pernambuco, Brazil.
Abstract:
Tuberous sclerosis complex (TSC) is a neurocutaneous syndrome with autosomal dominant inheritance, and most of the cases are related to loss of function of the TSC1 and TSC2 genes. TSC may occur with a wide range of clinical findings and skin, kidney, brain, and heart are the most commonly affected organs. Brain calcifications in TSC are also described and reported as diffuse and without pattern of symmetry or bilaterality. Recently, a new discovery opened the possibility of using vitamin D (VitD) for treating cerebral calcifications. Calcitriol, the active form of VitD, was able to reduce the calcification in an in vitro model, increasing expression of a gene related to primary familial brain calcification. We show that in the same experimental model, calcitriol was also able to restore and even increase expression of genes related to TSC. This article discusses the use of calcitriol supplementation in patients with TSC, which can be a very interesting strategy due to its low cost and because it is already used in various therapies.
Insights
Tuberous sclerosis complex (TSC) is a genetic disorder. Calcitriol, the active form of vitamin D (VitD), shows potential in reducing brain calcifications and restoring TSC-related gene expression in experimental models.
Area of Science:
- Genetics and Molecular Biology
- Neurology
- Endocrinology
Background:
- Tuberous sclerosis complex (TSC) is an autosomal dominant neurocutaneous syndrome.
- Mutations in TSC1 and TSC2 genes are the primary cause of TSC.
- Commonly affected organs include skin, kidneys, brain, and heart, with brain calcifications being a noted feature.
Purpose of the Study:
- To investigate the potential of calcitriol, the active form of vitamin D (VitD), in treating cerebral calcifications associated with TSC.
- To evaluate calcitriol's effect on gene expression related to TSC in an in vitro model.
Main Methods:
- Utilized an in vitro experimental model relevant to primary familial brain calcification.
- Assessed the impact of calcitriol on calcification reduction and gene expression levels.
Main Results:
- Calcitriol demonstrated the ability to reduce calcification in the experimental model.
- Calcitriol increased the expression of a gene linked to primary familial brain calcification.
- Calcitriol also restored and enhanced the expression of genes associated with TSC.
Conclusions:
- Calcitriol emerges as a promising therapeutic agent for cerebral calcifications in TSC.
- Vitamin D (VitD) supplementation with calcitriol presents a low-cost, viable strategy for TSC management.
- Further discussion on calcitriol's application in TSC patient therapy is warranted.
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