PTH [1–34] induced differentiation and mineralization of mandibular condylar cartilage
Abstract Intermittent Parathyroid Hormone (I-PTH) is the only FDA approved anabolic drug therapy available for the treatment of osteoporosis in males and postmenopausal females. The effects of I-PTH on the chondrogenic lineage of the mandibular condylar cartilage (MCC) are not well understood. To in...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2017-06-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-03428-y |
| _version_ | 1818425335230758912 |
|---|---|
| author | Mara Heather O’ Brien Eliane Hermes Dutra Alexandro Lima Ravindra Nanda Sumit Yadav |
| author_facet | Mara Heather O’ Brien Eliane Hermes Dutra Alexandro Lima Ravindra Nanda Sumit Yadav |
| author_sort | Mara Heather O’ Brien |
| collection | DOAJ |
| description | Abstract Intermittent Parathyroid Hormone (I-PTH) is the only FDA approved anabolic drug therapy available for the treatment of osteoporosis in males and postmenopausal females. The effects of I-PTH on the chondrogenic lineage of the mandibular condylar cartilage (MCC) are not well understood. To investigate the role of I-PTH on the MCC and subchondral bone, we carried out our studies using 4 to 5 week old triple transgenic mice (Col1a1XCol2a1XCol10a1). The experimental group was injected with PTH (80 μg/kg) daily for 2 weeks, while control group was injected with saline. Our histology showed that the I-PTH treatment led to an increased number of cells expressing Col1a1, Col2a1 and Col10a1. Additionally, there was an increase in cellular proliferation, increased proteoglycan distribution, increased cartilage thickness, increased TRAP activity, and mineralization. Immunohistochemical staining showed increased expression of pSMAD158 and VEGF in the MCC and subchondral bone. Furthermore our microCT data showed that I-PTH treatment led to an increased bone volume fraction, tissue density and trabecular thickness, with a decrease in trabecular spacing. Morphometric measurements showed increased mandibular length and condyle head length following I-PTH treatment. In conclusion, our study suggests that I-PTH plays a critical role in cellular proliferation, proteoglycan distribution, and mineralization of the MCC. |
| first_indexed | 2024-12-14T14:12:18Z |
| format | Article |
| id | doaj.art-5d214f32d93e407d888ed9bdd3563f11 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-14T14:12:18Z |
| publishDate | 2017-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-5d214f32d93e407d888ed9bdd3563f112022-12-21T22:58:16ZengNature PortfolioScientific Reports2045-23222017-06-017111010.1038/s41598-017-03428-yPTH [1–34] induced differentiation and mineralization of mandibular condylar cartilageMara Heather O’ Brien0Eliane Hermes Dutra1Alexandro Lima2Ravindra Nanda3Sumit Yadav4Division of Orthodontics, University of Connecticut Health CenterDivision of Orthodontics, University of Connecticut Health CenterDivision of Orthodontics, University of Connecticut Health CenterDivision of Orthodontics, University of Connecticut Health CenterDivision of Orthodontics, University of Connecticut Health CenterAbstract Intermittent Parathyroid Hormone (I-PTH) is the only FDA approved anabolic drug therapy available for the treatment of osteoporosis in males and postmenopausal females. The effects of I-PTH on the chondrogenic lineage of the mandibular condylar cartilage (MCC) are not well understood. To investigate the role of I-PTH on the MCC and subchondral bone, we carried out our studies using 4 to 5 week old triple transgenic mice (Col1a1XCol2a1XCol10a1). The experimental group was injected with PTH (80 μg/kg) daily for 2 weeks, while control group was injected with saline. Our histology showed that the I-PTH treatment led to an increased number of cells expressing Col1a1, Col2a1 and Col10a1. Additionally, there was an increase in cellular proliferation, increased proteoglycan distribution, increased cartilage thickness, increased TRAP activity, and mineralization. Immunohistochemical staining showed increased expression of pSMAD158 and VEGF in the MCC and subchondral bone. Furthermore our microCT data showed that I-PTH treatment led to an increased bone volume fraction, tissue density and trabecular thickness, with a decrease in trabecular spacing. Morphometric measurements showed increased mandibular length and condyle head length following I-PTH treatment. In conclusion, our study suggests that I-PTH plays a critical role in cellular proliferation, proteoglycan distribution, and mineralization of the MCC.https://doi.org/10.1038/s41598-017-03428-y |
| spellingShingle | Mara Heather O’ Brien Eliane Hermes Dutra Alexandro Lima Ravindra Nanda Sumit Yadav PTH [1–34] induced differentiation and mineralization of mandibular condylar cartilage Scientific Reports |
| title | PTH [1–34] induced differentiation and mineralization of mandibular condylar cartilage |
| title_full | PTH [1–34] induced differentiation and mineralization of mandibular condylar cartilage |
| title_fullStr | PTH [1–34] induced differentiation and mineralization of mandibular condylar cartilage |
| title_full_unstemmed | PTH [1–34] induced differentiation and mineralization of mandibular condylar cartilage |
| title_short | PTH [1–34] induced differentiation and mineralization of mandibular condylar cartilage |
| title_sort | pth 1 34 induced differentiation and mineralization of mandibular condylar cartilage |
| url | https://doi.org/10.1038/s41598-017-03428-y |
| work_keys_str_mv | AT maraheatherobrien pth134induceddifferentiationandmineralizationofmandibularcondylarcartilage AT elianehermesdutra pth134induceddifferentiationandmineralizationofmandibularcondylarcartilage AT alexandrolima pth134induceddifferentiationandmineralizationofmandibularcondylarcartilage AT ravindrananda pth134induceddifferentiationandmineralizationofmandibularcondylarcartilage AT sumityadav pth134induceddifferentiationandmineralizationofmandibularcondylarcartilage |