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Updated: Jun 3, 2025
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Laser Capture Microdissection of Mouse Embryonic Cartilage and Bone for Gene Expression Analysis
Published on: December 18, 2019
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Sox10 is required for systemic initiation of bone mineralization
Stefani Gjorcheska1, Sandhya Paudel1, Sarah McLeod1
1Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.
Development (Cambridge, England)
|January 10, 2025
Summary
Sox10 is crucial for bone mineralization by regulating calcium uptake. Sox10 deficiency leads to calcium deficiency and impaired bone formation due to elevated Stc1a hormone.
Area of Science:
- Developmental Biology
- Genetics
- Endocrinology
Background:
- Heterozygous SOX10 variants cause congenital syndromes impacting neural crest derivatives.
- SOX10's role in non-skeletal development is well-established, but its function in bone mineralization was unknown.
Purpose of the Study:
- To investigate the role of Sox10 in bone mineralization.
- To identify the molecular mechanisms underlying impaired bone formation in sox10 mutants.
Main Methods:
- Zebrafish sox10 mutants were analyzed for bone mineralization defects.
- Calcium uptake was assessed by examining Trpv6+ ionocytes.
- RNA sequencing was performed to identify differentially expressed genes.
- Epistasis assays were used to determine gene function relationships.
Main Results:
- Zebrafish sox10 mutants exhibit delayed bone mineralization despite normal osteoblast function.
- Mutants show a deficiency in Trpv6+ ionocytes, leading to severe calcium deficiency.
- Elevated stanniocalcin (Stc1a), an anti-hypercalcemic hormone, was observed in sox10 mutants.
- Excess Stc1a was confirmed as the cause of calcium deficit and impaired bone mineralization.
Conclusions:
- Sox10 is essential for initiating bone mineralization through non-autonomous regulation of calcium homeostasis.
- Sox10+ neural crest cells limit Stc1a production, enabling sufficient calcium uptake for bone formation.
- This study uncovers a novel role for SOX10 in skeletal development and calcium regulation.
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