1
|
Wang Q, Li N, Chen F, Hei R, Gu J, Lu Y, Sun L, Zheng Q. TAp63γ influences mouse cartilage development. Aging (Albany NY) 2020; 12:8669-8679. [PMID: 32392534 PMCID: PMC7244026 DOI: 10.18632/aging.103190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 04/17/2020] [Indexed: 04/09/2023]
Abstract
Depletion of tumor protein p63 results in severe epithelial as well as limb defects in mice, suggesting that p63 is also required for endochondral ossification during long bone development. A key stage in endochondral ossification is chondrocyte hypertrophy, which has been associated with elevated levels of the p63 variant TAp63γ. To investigate the role of TAp63γ in chondrocyte differentiation and maturation, we developed stable TAp63γ expressing ATDC5 cells. Compared to control cells, TAp63γ cells showed significant upregulation of Col10a1 after 4 and 7 days in culture. Moreover, alkaline phosphatase, Alizarin red, and Alcian blue staining were stronger in TAp63γ cells, suggesting that TAp63γ promotes chondrocyte proliferation, hypertrophic differentiation, and possibly matrix mineralization. To investigate the in vivo function of TAp63γ during endochondral bone formation, we established transgenic mice that express flag-tagged TAp63γ driven by Col10a1 regulatory elements. Skeletal staining of transgenic mice at postnatal day 1 showed accelerated ossification in long bone, tail, and digit bones compared to wild-type littermates. Furthermore, Sox9 expression was reduced and Runx2 expression was increased in the proliferative and/or hypertrophic zones of these mice. Altogether, these results suggest that TAp63γ promotes endochondral ossification and skeletal development, at least partially via controlling chondrocyte differentiation and maturation.
Collapse
Affiliation(s)
- Qian Wang
- Department of Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Na Li
- Department of Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, China
- Department of Blood Transfusion, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Fangzhou Chen
- Department of Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Ruoxuan Hei
- Department of Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Junxia Gu
- Department of Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Yaojuan Lu
- Shenzhen Academy of Peptide Targeting Technology at Pingshan, and Shenzhen Tyercan Bio-pharm Co., Ltd., Shenzhen 518118, China
| | - Lichun Sun
- Department of Medicine, School of Medicine, Tulane Health Sciences Center, New Orleans, LA 70112, USA
| | - Qiping Zheng
- Department of Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, China
- Shenzhen Academy of Peptide Targeting Technology at Pingshan, and Shenzhen Tyercan Bio-pharm Co., Ltd., Shenzhen 518118, China
| |
Collapse
|
2
|
Analysis of large phenotypic variability of EEC and SHFM4 syndromes caused by K193E mutation of the TP63 gene. PLoS One 2012; 7:e35337. [PMID: 22574117 PMCID: PMC3344828 DOI: 10.1371/journal.pone.0035337] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 03/15/2012] [Indexed: 01/08/2023] Open
Abstract
EEC (ectrodactyly, ectodermal dysplasia, clefting; OMIM 604292) is an autosomal dominant developmental disorder resulting mainly from pathogenic mutations of the DNA-binding domain (DBD) of the TP63 gene. In this study, we showed that K193E mutation in nine affected individuals of a four-generation kindred with a large degree of phenotypic variability causes four different syndromes or TP63-related disorders: EEC, Ectrodactyly-ectodermal dysplasia (EE), isolated ectodermal dysplasia, and isolated Split Hand/Foot Malformation type 4 (SHFM4). Genotype-phenotype and DBD structural modeling analysis showed that the K193-located loop L2-A is associated with R280 through hydrogen bonding interactions, while R280 mutations also often cause large phenotypic variability of EEC and SHFM4. Thus, we speculate that K193 and several other DBD mutation-associated syndromes may share similar pathogenic mechanisms, particularly in the case of the same mutation with different phenotypes. Our study and others also suggest that the phenotypic variability of EEC is attributed, at least partially, to genetic and/or epigenetic modifiers.
Collapse
|
3
|
Cabanillas M, Torrelo A, Monteagudo B, Suárez-Amor O, Ramírez-Santos A, González-Vilas D, de Las Heras C. A novel heterozygous point mutation in the p63 gene in a patient with ectodermal dysplasia associated with B-cell leukemia. Pediatr Dermatol 2011; 28:707-710. [PMID: 21906144 DOI: 10.1111/j.1525-1470.2011.01474.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We report a 7-year-old boy with a past medical history of B-cell leukemia with dysmorphic features, including cleft palate, hypotrichosis with trichorrhexis nodosa, hypohidrosis, oligodontia, and ridging of nails. A heterozygous germline mutation, Ala111Thr, in the p63 gene was detected in the boy and in his mother, who had no clinical expression. This case emphasizes the spectrum of different phenotypical manifestations of mutations in the p63 gene and underlines the possible role of this gene as a tumor suppressor.
Collapse
Affiliation(s)
- Miguel Cabanillas
- Department of Dermatology, Complejo Hospitalario Arquitecto Marcide-Novoa Santos, Ferrol, Spain
| | - Antonio Torrelo
- Department of Dermatology, Hospital Niño Jesús, Madrid, Spain
| | - Benigno Monteagudo
- Department of Dermatology, Complejo Hospitalario Arquitecto Marcide-Novoa Santos, Ferrol, Spain
| | - Oscar Suárez-Amor
- Department of Dermatology, Complejo Hospitalario Arquitecto Marcide-Novoa Santos, Ferrol, Spain
| | - Aquilina Ramírez-Santos
- Department of Dermatology, Complejo Hospitalario Arquitecto Marcide-Novoa Santos, Ferrol, Spain
| | - Daniel González-Vilas
- Department of Dermatology, Complejo Hospitalario Arquitecto Marcide-Novoa Santos, Ferrol, Spain
| | - Cristina de Las Heras
- Department of Dermatology, Complejo Hospitalario Arquitecto Marcide-Novoa Santos, Ferrol, Spain
| |
Collapse
|