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Zhang B, Sun BY, Ji YW, Zhang YP, Wang XX, Xu X, Wen Y. Expression and localization of Yap and Taz during development of the mandibular first molar in rats. Biotech Histochem 2017; 92:212-221. [PMID: 28402144 DOI: 10.1080/10520295.2016.1267799] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Yes-associated protein (Yap) and transcriptional coactivator with PDZ-binding motif (Taz) are two downstream factors in the Hippo signaling pathway. Yap and Taz participate in regulating organ size, stem cell self-renewal, proliferation and differentiation. We investigated the spatial-temporal expression and relative expression levels of Yap and Taz using immunohistochemistry and real-time polymerase chain reaction. We found Yap and Taz in the oral epithelium and mesenchyme at embryonic (E) day 14.5 (E14.5) and E16.5. By E18.5, Yap and Taz were detected in the dental papilla and the entire enamel organ. At postnatal (P) day 0 (PN0), PN3 and PN7, Yap and Taz expression was localized in ameloblasts, odontoblasts and stratum intermedium. Yap and Taz were expressed in Hertwig's epithelial root sheath (HERS) at PN7. At PN3, PN7 and PN14, Yap was detected in the enamel matrix. From PN21 to PN28, Yap and Taz were absent from differentiated ameloblasts, but they were expressed in odontoblasts. From PN0 to PN10, the Yap and Taz mRNA expression increased, then decreased. We found that Yap and Taz may influence the differentiation of ameloblasts and odontoblasts; they also may contribute to enamel mineralization, crown morphogenesis and root formation.
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Affiliation(s)
- B Zhang
- a School of Stomatology, Shandong University, and Shandong Provincial Key Laboratory of Oral Tissue, Jinan , Shandong , P. R. China
| | - B Y Sun
- a School of Stomatology, Shandong University, and Shandong Provincial Key Laboratory of Oral Tissue, Jinan , Shandong , P. R. China
| | - Y W Ji
- a School of Stomatology, Shandong University, and Shandong Provincial Key Laboratory of Oral Tissue, Jinan , Shandong , P. R. China
| | - Y P Zhang
- a School of Stomatology, Shandong University, and Shandong Provincial Key Laboratory of Oral Tissue, Jinan , Shandong , P. R. China
| | - X X Wang
- a School of Stomatology, Shandong University, and Shandong Provincial Key Laboratory of Oral Tissue, Jinan , Shandong , P. R. China
| | - X Xu
- a School of Stomatology, Shandong University, and Shandong Provincial Key Laboratory of Oral Tissue, Jinan , Shandong , P. R. China
| | - Y Wen
- a School of Stomatology, Shandong University, and Shandong Provincial Key Laboratory of Oral Tissue, Jinan , Shandong , P. R. China
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Seo Y, Ji YW, Lee SM, Shim J, Noh H, Yeo A, Park C, Park MS, Chang EJ, Lee HK. Activation of HIF-1α (hypoxia inducible factor-1α) prevents dry eye-induced acinar cell death in the lacrimal gland. Cell Death Dis 2014; 5:e1309. [PMID: 24967971 PMCID: PMC4611733 DOI: 10.1038/cddis.2014.260] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Revised: 04/21/2014] [Accepted: 04/22/2014] [Indexed: 12/22/2022]
Abstract
The pathogenesis of immune-mediated lacrimal gland (LG) dysfunction in Sjögren's syndrome has been thoroughly studied. However, the majority of dry eye (DE) is not related to Sjögren type, and its pathophysiology remains unclear. The purpose of this study was to determine and investigate the protective mechanisms against DE stress in mice. DE induced prominent blood vessel loss without apoptosis or necrosis in the LG. Autophagic vacuoles, distressed mitochondria, and stressed endoplasmic reticulum were observed via electron microscopy. Immunoblotting confirmed the increase in autophagic markers. Glycolytic activities were enhanced with increasing levels of succinate and malate that, in turn, activated hypoxia-inducible factor (HIF)-1α. Interestingly, the areas of stable HIF-1α expression overlapped with COX-2 and MMP-9 upregulation in LGs of DE-induced mice. We generated HIF-1α conditional knockout (CKO) mice in which HIF-1α expression was lost in the LG. Surprisingly, normal LG polarities and morphologies were completely lost with DE induction, and tremendous acinar cell apoptosis was observed. Similar to Sjögren's syndrome, CD3+ and CD11b+ cells infiltrated HIF-1α CKO LGs. Our results show that DE induced the expression of HIF-1α that activated autophagy signals to prevent further acinar cell damage and to maintain normal LG function.
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Affiliation(s)
- Y Seo
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Y W Ji
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - S M Lee
- 1] Schephens Eye Research Institute, Harvard Medical School, Boston, MA, USA [2] Department of Ophthalmology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
| | - J Shim
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - H Noh
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - A Yeo
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - C Park
- Clinical Trials Center, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea
| | - M S Park
- Clinical Trials Center, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea
| | - E J Chang
- Department of Anatomy and Cell Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - H K Lee
- 1] Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea [2] Institute of Corneal Dystrophy Research, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea
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Fan YG, Ji YW, Huang ZX, Chen HC. [Syntheses of 1-(2-hydroxy-3-aryloxypropyl)-4-aroylpiperazines]. Yao Xue Xue Bao 1987; 22:185-90. [PMID: 3661204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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