| Title |
Deletion of the Transcription Factor PGC-1α in Mice Negatively Regulates Bone Mass
|
|---|---|
| Published in |
Calcified Tissue International, August 2018
|
| DOI | 10.1007/s00223-018-0459-4 |
| Pubmed ID | |
| Authors |
Graziana Colaianni, Luciana Lippo, Lorenzo Sanesi, Giacomina Brunetti, Monica Celi, Nunzio Cirulli, Giovanni Passeri, Janne Reseland, Ernestina Schipani, Maria Felicia Faienza, Umberto Tarantino, Silvia Colucci, Maria Grano |
| Abstract |
Peroxisome proliferator-activated receptor-gamma coactivator (PGC1α) is a transcription coactivator that interacts with a broad range of transcription factors involved in several biological responses. Here, we show that PGC1α plays a role in skeletal homeostasis since aged PGC1α-deficient mice (PGC1α-/-) display impaired bone structure. Micro-CT of the tibial mid-shaft showed a marked decrease of cortical thickness in PGC1α-/- (- 11.9%, p < 0.05) mice compared to wild-type littermate. Trabecular bone was also impaired in knock out mice which displayed lower trabecular thickness (Tb.Th) (- 5.9% vs PGC1α+/+, p < 0.05), whereas trabecular number (Tb.N) was higher than wild-type mice (+ 72% vs PGC1α+/+, p < 0.05), thus resulting in increased (+ 31.7% vs PGC1α+/+, p < 0.05) degree of anisotropy (DA), despite unchanged bone volume fraction (BV/TV). Notably, these impairments of cortical and trabecular bone led to a dramatic ~ 48.4% decrease in bending strength (p < 0.01). These changes in PGC1α-/- mice were paralleled by a significant increase in osteoclast number at the cortical bone surface and in serum level of the bone resorption marker, namely, C-terminal cross-linked telopeptides of type I collagen (CTX-I). We also found that in cortical bone, there was lower expression of mRNA codifying for the key bone-building protein Osteocalcin (Ocn). Interestingly, Collagen I mRNA expression was reduced in mesenchymal stem cells from bone marrow of PGC1α-/-, thus indicating that differentiation of osteoblast lineage is downregulated. Overall, results presented herein suggest that PGC1α may play a key role in bone metabolism. |
X Demographics
The data shown below were collected from the profiles of 3 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Netherlands | 1 | 33% |
| Unknown | 2 | 67% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 2 | 67% |
| Scientists | 1 | 33% |
Mendeley readers
The data shown below were compiled from readership statistics for 20 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 20 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 4 | 20% |
| Researcher | 3 | 15% |
| Student > Ph. D. Student | 2 | 10% |
| Professor | 1 | 5% |
| Other | 1 | 5% |
| Other | 2 | 10% |
| Unknown | 7 | 35% |
| Readers by discipline | Count | As % |
|---|---|---|
| Biochemistry, Genetics and Molecular Biology | 5 | 25% |
| Medicine and Dentistry | 4 | 20% |
| Sports and Recreations | 1 | 5% |
| Chemistry | 1 | 5% |
| Engineering | 1 | 5% |
| Other | 0 | 0% |
| Unknown | 8 | 40% |
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 14 August 2018.
All research outputs
#15,542,971
of 23,099,576 outputs
Outputs from Calcified Tissue International
#1,358
of 1,785 outputs
Outputs of similar age
#210,180
of 331,391 outputs
Outputs of similar age from Calcified Tissue International
#15
of 24 outputs
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So far Altmetric has tracked 1,785 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.0. This one is in the 18th percentile – i.e., 18% of its peers scored the same or lower than it.
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