In:
European Journal of Oral Sciences, Wiley, Vol. 124, No. 3 ( 2016-06), p. 241-245
Abstract:
Mutation of the dihydroorotate dehydrogenase ( DHODH ) gene is responsible for Miller syndrome, which is characterized by craniofacial malformations with limb abnormalities. We previously demonstrated that DHODH was involved in forming a mitochondrial supercomplex and that mutated DHODH led to protein instability, loss of enzyme activity, and increased levels of reactive oxygen species in HeLa cells. To explore the etiology of Miller syndrome in more detail, we investigated the effects of DHODH inhibition in the cells involved in skeletal structure. Dihydroorotate dehydrogenase in MC 3T3‐E1 cells derived from mouse calvaria osteoblast precursor cells was knocked down by specific small interfering RNA s (si RNA s), and cell proliferation, ATP production, and expression of bone‐related genes were investigated in these cells. After depletion of DHODH using specific si RNA s, inhibition of cell proliferation and cell cycle arrest occurred in MC 3T3‐E1 cells. In addition, ATP production was reduced in whole cells, especially in mitochondria. Furthermore, the levels of runt‐related transcription factor 2 ( Runx2 ) and osteocalcin ( Ocn ) mRNA s were lower in DHODH si RNA ‐treated cells compared with controls. These data suggest that depletion of DHODH affects the differentiation and maturation of osteoblasts. This study shows that mitochondrial dysfunction by DHODH depletion in osteoblasts can be directly linked to the abnormal bone formation in Miller syndrome.
Type of Medium:
Online Resource
ISSN:
0909-8836
,
1600-0722
DOI:
10.1111/eos.2016.124.issue-3
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
2025657-7
Permalink
