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Yoshimoto S, Yada N, Ishikawa A, Kawano K, Matsuo K, Hiraki A, Okamura K. TGF-β3 from fibroblasts promotes necrotising sialometaplasia by suppressing salivary gland cell proliferation and inducing squamous metaplasia. J Pathol 2024; 263:338-346. [PMID: 38594209 DOI: 10.1002/path.6287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/25/2024] [Accepted: 03/20/2024] [Indexed: 04/11/2024]
Abstract
Necrotising sialometaplasia (NSM) is a non-neoplastic lesion mainly arising in the minor salivary glands of the oral cavity. In the clinical features, NSM shows swelling with or without ulceration, and can mimic a malignant disease such as squamous cell carcinoma. Histopathologically, NSM usually shows the lobular architecture that is observed in the salivary glands. Additionally, acinar infarction and squamous metaplasia of salivary ducts and acini are observable. The aetiology of this lesion remains unknown, although it has a characteristic feature that sometimes requires clinical and histopathological differentiation from malignancy. In this study, we investigated upregulated genes in NSM compared with normal salivary glands, and focused on the TGF-β3 (TGFB3) gene. The results of the histopathological studies clarified that fibroblasts surrounding the lesion express TGF-β3. Moreover, in vitro studies using mouse salivary gland organoids revealed that TGF-β3 suppressed salivary gland cell proliferation and induced squamous metaplasia. We demonstrated a possible aetiology of NSM by concluding that increased TGF-β3 expression during wound healing or tissue regeneration played a critical role in cell proliferation and metaplasia. © 2024 The Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Shohei Yoshimoto
- Section of Pathology, Department of Morphological Biology, Division of Biomedical Sciences, Fukuoka Dental College, Fukuoka, Japan
- Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan
| | - Naomi Yada
- Department of Health Promotion, Division of Oral Pathology, Kyushu Dental University, Kitakyushu, Japan
| | | | - Kenji Kawano
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Oita University, Oita, Japan
| | - Kou Matsuo
- Department of Health Promotion, Division of Oral Pathology, Kyushu Dental University, Kitakyushu, Japan
| | - Akimitsu Hiraki
- Section of Oral Oncology, Department of Oral and Maxillofacial Surgery, Division of Oral and Medical Management, Fukuoka Dental College, Fukuoka, Japan
| | - Kazuhiko Okamura
- Section of Pathology, Department of Morphological Biology, Division of Biomedical Sciences, Fukuoka Dental College, Fukuoka, Japan
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2
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Bourne LE, Jayash SN, Michels LV, Hopkinson M, Guppy FM, Clarkin CE, Gard P, Brissett N, Staines KA. Sexually dimorphic effects of prenatal alcohol exposure on the murine skeleton. Biol Sex Differ 2024; 15:51. [PMID: 38890762 PMCID: PMC11186175 DOI: 10.1186/s13293-024-00626-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 06/11/2024] [Indexed: 06/20/2024] Open
Abstract
BACKGROUND Prenatal alcohol exposure (PAE) can result in lifelong disabilities known as foetal alcohol spectrum disorder (FASD) and is associated with childhood growth deficiencies and increased bone fracture risk. However, the effects of PAE on the adult skeleton remain unclear and any potential sexual dimorphism is undetermined. Therefore, we utilised a murine model to examine sex differences with PAE on in vitro bone formation, and in the juvenile and adult skeleton. METHODS Pregnant C57BL/6J female mice received 5% ethanol in their drinking water during gestation. Primary calvarial osteoblasts were isolated from neonatal offspring and mineralised bone nodule formation and gene expression assessed. Skeletal phenotyping of 4- and 12-week-old male and female offspring was conducted by micro-computed tomography (µCT), 3-point bending, growth plate analyses, and histology. RESULTS Osteoblasts from male and female PAE mice displayed reduced bone formation, compared to control (≤ 30%). Vegfa, Vegfb, Bmp6, Tgfbr1, Flt1 and Ahsg were downregulated in PAE male osteoblasts only, whilst Ahsg was upregulated in PAE females. In 12-week-old mice, µCT analysis revealed a sex and exposure interaction across several trabecular bone parameters. PAE was detrimental to the trabecular compartment in male mice compared to control, yet PAE females were unaffected. Both male and female mice had significant reductions in cortical parameters with PAE. Whilst male mice were negatively affected along the tibial length, females were only distally affected. Posterior cortical porosity was increased in PAE females only. Mechanical testing revealed PAE males had significantly reduced bone stiffness compared to controls; maximum load and yield were reduced in both sexes. PAE had no effect on total body weight or tibial bone length in either sex. However, total growth plate width in male PAE mice compared to control was reduced, whilst female PAE mice were unaffected. 4-week-old mice did not display the altered skeletal phenotype with PAE observed in 12-week-old animals. CONCLUSIONS Evidence herein suggests, for the first time, that PAE exerts divergent sex effects on the skeleton, possibly influenced by underlying sex-specific transcriptional mechanisms of osteoblasts. Establishing these sex differences will support future policies and clinical management of FASD.
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Affiliation(s)
- Lucie E Bourne
- School of Applied Sciences, Centre for Lifelong Health, University of Brighton, Lewes Road, Brighton, BN2 4GT, UK
| | - Soher N Jayash
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Lysanne V Michels
- School of Biological Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Mark Hopkinson
- Comparative Biomedical Sciences, Royal Veterinary College, London, NW1 0TU, UK
| | - Fergus M Guppy
- Institute of Life and Earth Sciences, School of Energy, Geosciences, Infrastructure and Society, Heriot Watt University, Edinburgh, EH14 4AS, UK
| | - Claire E Clarkin
- School of Biological Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Paul Gard
- School of Applied Sciences, Centre for Lifelong Health, University of Brighton, Lewes Road, Brighton, BN2 4GT, UK
| | - Nigel Brissett
- School of Applied Sciences, Centre for Lifelong Health, University of Brighton, Lewes Road, Brighton, BN2 4GT, UK
| | - Katherine A Staines
- School of Applied Sciences, Centre for Lifelong Health, University of Brighton, Lewes Road, Brighton, BN2 4GT, UK.
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Taguchi M, Yoshimoto S, Suyama K, Sumi S, Ohki S, Ogata K, Fujimoto R, Murata D, Nakayama K, Oka K. Creating 3D constructs with cranial neural crest-derived cell lines using a bio-3D printer. J Oral Biosci 2024; 66:339-348. [PMID: 38750954 DOI: 10.1016/j.job.2024.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 05/10/2024] [Accepted: 05/13/2024] [Indexed: 06/15/2024]
Abstract
OBJECTIVES The development of bio-three-dimensional (bio-3D) printers has led to significant advances in regenerative medicine. Three-dimensional constructs, including spheroids, are maintained by extracellular matrix proteins secreted by cells so that the cells can be cultured in conditions closer to the physiological environment. This study aimed to create a useful 3D construct as a model of the dentin-pulp complex. METHODS We examined the expression patterns of extracellular matrix proteins and cell proliferation areas in a 3D construct created using O9-1 cells derived from cranial neural crest cells of mice. The 3D construct was created by sticking the spheroid cultures onto a needle array using a bio-3D printer. RESULTS Cell proliferation areas along with characteristic expression of tenascin C and DMP1 were evaluated. The expression of tenascin C and DMP1 was significantly enhanced in the spheroids compared to that in two-dimensional cultures. Moreover, cell proliferation regions and tenascin C expression were confirmed in the outer layer of spheroids in the embryonic stem cell medium, with insignificant DMP1 expression being observed. Interestingly, in a 3D construct cultured in calcification-induction medium, DMP1 expression was promoted, and DMP1-positive cells existed in the outermost layer without overlapping with tenascin C expression. CONCLUSIONS The extracellular matrix proteins, tenascin C and DMP1, were expressed in a polarized manner in spheroids and 3D constructs, similar to the findings in the dental papilla. Therefore, these 3D constructs show potential as artificial models for studying odontogenesis.
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Affiliation(s)
- Masahide Taguchi
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Fukuoka Dental College, Fukuoka, Japan.
| | - Shohei Yoshimoto
- Section of Pathology, Department of Morphological Biology, Fukuoka Dental College, Fukuoka, Japan; Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan.
| | - Kanako Suyama
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Fukuoka Dental College, Fukuoka, Japan.
| | - Satoko Sumi
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Fukuoka Dental College, Fukuoka, Japan.
| | - Shirabe Ohki
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Fukuoka Dental College, Fukuoka, Japan.
| | - Kayoko Ogata
- Department of Legal Medicine, Graduate School of Medical Sciences, Kanazawa University, Japan.
| | - Ryota Fujimoto
- Center for Regenerative Medicine Research, Faculty of Medicine, Saga University, Saga, Japan.
| | - Daiki Murata
- Center for Regenerative Medicine Research, Faculty of Medicine, Saga University, Saga, Japan.
| | - Koichi Nakayama
- Center for Regenerative Medicine Research, Faculty of Medicine, Saga University, Saga, Japan.
| | - Kyoko Oka
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Fukuoka Dental College, Fukuoka, Japan; Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan.
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4
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Hammond NL, Dixon MJ. Revisiting the embryogenesis of lip and palate development. Oral Dis 2022; 28:1306-1326. [PMID: 35226783 PMCID: PMC10234451 DOI: 10.1111/odi.14174] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/17/2022] [Accepted: 02/23/2022] [Indexed: 12/13/2022]
Abstract
Clefts of the lip and palate (CLP), the major causes of congenital facial malformation globally, result from failure of fusion of the facial processes during embryogenesis. With a prevalence of 1 in 500-2500 live births, CLP causes major morbidity throughout life as a result of problems with facial appearance, feeding, speaking, obstructive apnoea, hearing and social adjustment and requires complex, multi-disciplinary care at considerable cost to healthcare systems worldwide. Long-term outcomes for affected individuals include increased mortality compared with their unaffected siblings. The frequent occurrence and major healthcare burden imposed by CLP highlight the importance of dissecting the molecular mechanisms driving facial development. Identification of the genetic mutations underlying syndromic forms of CLP, where CLP occurs in association with non-cleft clinical features, allied to developmental studies using appropriate animal models is central to our understanding of the molecular events underlying development of the lip and palate and, ultimately, how these are disturbed in CLP.
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Affiliation(s)
- Nigel L. Hammond
- Faculty of Biology, Medicine and HealthUniversity of ManchesterManchesterUK
| | - Michael J. Dixon
- Faculty of Biology, Medicine and HealthUniversity of ManchesterManchesterUK
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5
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Oka K. Fibrillin protein, a candidate for creating a suitable scaffold in PDL regeneration while avoiding ankylosis. Genesis 2022; 60:e23486. [PMID: 35678273 DOI: 10.1002/dvg.23486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/26/2022] [Accepted: 05/14/2022] [Indexed: 11/11/2022]
Abstract
The tooth is stabilized by fiber-rich tissue called the periodontal ligament (PDL). The narrow space of the PDL does not calcify in the physiological state even thought it exists between two calcified tissues, namely, the cementum of the root and alveolar bone. Two situations that require PDL regeneration are periodontitis and dental trauma. Periodontitis induces the loss of PDL and alveolar bone due to inflammation related to infection. Conversely, in PDLs damaged by dental trauma, accelerating bone formation as an overreaction of the healing process is induced, thereby inducing dentoalveolar ankylosis at the tooth root surface. PDL regeneration following dental trauma must therefore be considered separately from periodontitis. Therefore, PDL regeneration in dental trauma must be considered separately from periodontitis. This review focuses on the components involved in avoiding dentoalveolar ankylosis, including oxytalan fibers, aggregated microfibrils, epithelial cell rests of Malassez (ERM), and TGF-β signaling. During root development, oxytalan fibers produced by PDL cells work in collaboration with the epithelial components in the PDL (e.g., Hertwig's root sheath [HERS] and ERM). We herein describe the functions of oxytalan fibers, ERM, and TGF-β signals which are involved in the avoidance of bone formation.
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Affiliation(s)
- Kyoko Oka
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan
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Jaruga A, Ksiazkiewicz J, Kuzniarz K, Tylzanowski P. Orofacial Cleft and Mandibular Prognathism-Human Genetics and Animal Models. Int J Mol Sci 2022; 23:ijms23020953. [PMID: 35055138 PMCID: PMC8779325 DOI: 10.3390/ijms23020953] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/24/2021] [Accepted: 01/13/2022] [Indexed: 12/12/2022] Open
Abstract
Many complex molecular interactions are involved in the process of craniofacial development. Consequently, the network is sensitive to genetic mutations that may result in congenital malformations of varying severity. The most common birth anomalies within the head and neck are orofacial clefts (OFCs) and prognathism. Orofacial clefts are disorders with a range of phenotypes such as the cleft of the lip with or without cleft palate and isolated form of cleft palate with unilateral and bilateral variations. They may occur as an isolated abnormality (nonsyndromic-NSCLP) or coexist with syndromic disorders. Another cause of malformations, prognathism or skeletal class III malocclusion, is characterized by the disproportionate overgrowth of the mandible with or without the hypoplasia of maxilla. Both syndromes may be caused by the presence of environmental factors, but the majority of them are hereditary. Several mutations are linked to those phenotypes. In this review, we summarize the current knowledge regarding the genetics of those phenotypes and describe genotype-phenotype correlations. We then present the animal models used to study these defects.
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Affiliation(s)
- Anna Jaruga
- Laboratory of Molecular Genetics, Department of Biomedical Sciences, Medical University of Lublin, Chodzki 1, 20-093 Lublin, Poland; (A.J.); (J.K.)
| | - Jakub Ksiazkiewicz
- Laboratory of Molecular Genetics, Department of Biomedical Sciences, Medical University of Lublin, Chodzki 1, 20-093 Lublin, Poland; (A.J.); (J.K.)
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, University of Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Krystian Kuzniarz
- Department of Maxillofacial Surgery, Medical University of Lublin, Staszica 11, 20-081 Lublin, Poland;
| | - Przemko Tylzanowski
- Laboratory of Molecular Genetics, Department of Biomedical Sciences, Medical University of Lublin, Chodzki 1, 20-093 Lublin, Poland; (A.J.); (J.K.)
- Department of Development and Regeneration, University of Leuven, Herestraat 49, 3000 Leuven, Belgium
- Correspondence:
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7
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Adachi Y, Higuchi A, Wakai E, Shiromizu T, Koiwa J, Nishimura Y. Involvement of homeobox transcription factor Mohawk in palatogenesis. Congenit Anom (Kyoto) 2022; 62:27-37. [PMID: 34816492 DOI: 10.1111/cga.12451] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 10/05/2021] [Accepted: 11/06/2021] [Indexed: 12/17/2022]
Abstract
Palatogenesis is affected by many factors, including gene polymorphisms and exposure to toxic chemicals during sensitive developmental periods. Cleft palate is one of the most common congenital anomalies, and ongoing efforts to elucidate the molecular mechanisms underlying palatogenesis are providing useful insights to reduce the risk of this disorder. To identify novel potential regulators of palatogenesis, we analyzed public transcriptome datasets from a mouse model of cleft palate caused by selective deletion of transforming growth factor-β (TGFβ) receptor type 2 in cranial neural crest cells. We identified the homeobox transcription factor Mohawk (Mkx) as a gene downregulated in the maxilla of TGFβ knockout mice compared with wild-type mice. To examine the role of mkx in palatogenesis, we used CRISPR/Cas9 editing to generate zebrafish with impaired expression of mkxa and mkxb, the zebrafish homologs of Mkx. We found that mkx crispants expressed reduced levels of gli1, a critical transcription factor in the Sonic hedgehog (SHH) signaling pathway that plays an important role in the regulation of palatogenesis. Furthermore, we found that mkxa-/- zebrafish were more susceptible than mkxa+/+ zebrafish to the deleterious effects of cyclopamine, an inhibitor of SHH signaling, on upper jaw development. These results suggest that Mkx may be involved in palatogenesis regulated by TGFβ and SHH signaling, and that impairment in Mkx function may be related to the etiology of cleft palate.
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Affiliation(s)
- Yuka Adachi
- Department of Integrative Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Aina Higuchi
- Department of Integrative Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Eri Wakai
- Department of Integrative Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Takashi Shiromizu
- Department of Integrative Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Junko Koiwa
- Department of Integrative Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Yuhei Nishimura
- Department of Integrative Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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8
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Deng J, Wang S, Li N, Chen X, Wang B, Liu H, Zhu L, Cong W, Xiao J, Liu C. Noggin Overexpression Impairs the Development of Muscles, Tendons, and Aponeurosis in Soft Palates by Disrupting BMP-Smad and Shh-Gli1 Signaling. Front Cell Dev Biol 2021; 9:711334. [PMID: 34557486 PMCID: PMC8453081 DOI: 10.3389/fcell.2021.711334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/06/2021] [Indexed: 11/13/2022] Open
Abstract
The roles of bone morphogenetic protein (BMP) signaling in palatogenesis were well documented in the developing hard palate; however, little is known about how BMP signaling regulates the development of soft palate. In this study, we overexpressed Noggin transgene via Osr2-cre KI allele to suppress BMP signaling in the developing soft palate. We found that BMP-Smad signaling was detected in the palatal muscles and surrounding mesenchyme. When BMP-Smad signaling was suppressed by the overexpressed Noggin, the soft palatal shelves were reduced in size with the hypoplastic muscles and the extroversive hypophosphatasia (HPP). The downregulated cell proliferation and survival in the Osr2-cre KI ;pMes-Noggin soft palates were suggested to result from the repressed Shh transcription and Gli1 activity, implicating that the BMP-Shh-Gli1 network played a similar role in soft palate development as in the hard palate. The downregulated Sox9, Tenascin-C (TnC), and Col1 expression in Osr2-cre KI ;pMes-Noggin soft palate indicated the impaired differentiation of the aponeurosis and tendons, which was suggested to result in the hypoplasia of palatal muscles. Intriguingly, in the Myf5-cre KI ;pMes-Noggin and the Myf5-cre KI ;Rosa26R-DTA soft palates, the hypoplastic or abrogated muscles affected little the fusion of soft palate. Although the Scx, Tnc, and Co1 transcription was significantly repressed in the tenogenic mesenchyme of the Myf5-cre KI ;pMes-Noggin soft palate, the Sox9 expression, and the Tnc and Col1 transcription in aponeurosis mesenchyme were almost unaffected. It implicated that the fusion of soft palate was controlled by the mesenchymal clues at the tensor veli palatini (TVP) and levator veli palatini (LVP) levels, but by the myogenic components at the palatopharyngeus (PLP) level.
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Affiliation(s)
- Jiamin Deng
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Shangqi Wang
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Nan Li
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China.,Academician Laboratory of Immune and Oral Development and Regeneration, Dalian Medical University, Dalian, China
| | - Xiaoyan Chen
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Biying Wang
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Han Liu
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Lei Zhu
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Wei Cong
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China.,Academician Laboratory of Immune and Oral Development and Regeneration, Dalian Medical University, Dalian, China
| | - Jing Xiao
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China.,Academician Laboratory of Immune and Oral Development and Regeneration, Dalian Medical University, Dalian, China
| | - Chao Liu
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China.,Academician Laboratory of Immune and Oral Development and Regeneration, Dalian Medical University, Dalian, China
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9
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Liu X, Liu H, Wu Y, He Z, Shen L, Zhang H, Wan Z, Chen Y, Yue H, Zhang T, Gao S, Yu Z. The role of lncRNA Meg3 in the proliferation of all-trans retinoic acid-treated mouse embryonic palate mesenchymal cells involves the Smad pathway. Reprod Toxicol 2021; 104:1-7. [PMID: 34166781 DOI: 10.1016/j.reprotox.2021.06.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 05/25/2021] [Accepted: 06/18/2021] [Indexed: 11/27/2022]
Abstract
Mesenchymal cell proliferation is critical for the growth of the palate shelf. All-trans retinoic acid (atRA), as well as pathways associated with TGF-β/Smad signaling, play crucial roles in the proliferation of mouse embryonic palate mesenchymal (MEPM) cells. We have found that MEPM-cell proliferation was regulated by atRA and exogenous TGF-β3 could significantly antagonize the atRA-mediated suppression of MEPM cell proliferation, which is closely associated with the regulation of TGF-β/Smad signaling pathway. The long non-coding RNA (lncRNA) MEG3 has been reported to activate TGF-β/Smad signaling, thereby regulating cellular proliferation, differentiation, and related processes. Here, we found that Meg3 expression increased significantly in atRA-treated MEPM cells while TGF-β3 treatment markedly inhibited Meg3 expression and antagonized the effect of atRA on Meg3. Moreover, Smad2 was found to interact directly with Meg3, and atRA treatment significantly enriched Meg3 in Smad2-immunoprecipitated samples. After Meg3 deletion, the effects of atRA on the proliferation of MEPM cells and TGF-β3-dependent protein expression were lost. Hence, we speculate that Meg3 has a role in the RA-induced suppression of MEPM cell proliferation by targeting Smad2 and thereby mediating TGF-β/Smad signaling inhibition.
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Affiliation(s)
- Xiaozhuan Liu
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan, China
| | - Hongyan Liu
- Department of Medical Genetics, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Yang Wu
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan, China
| | - Zhidong He
- School of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Lijun Shen
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan, China
| | - Huanhuan Zhang
- School of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Zhongxiao Wan
- School of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Yao Chen
- School of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Haodi Yue
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan, China
| | - Tingting Zhang
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan, China
| | - Suhua Gao
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan, China
| | - Zengli Yu
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan, China; School of Public Health, Zhengzhou University, Zhengzhou, Henan, China.
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10
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Liu X, Zhang Y, Shen L, He Z, Chen Y, Li N, Zhang X, Zhang T, Gao S, Yue H, Li Z, Yu Z. LncRNA Meg3-mediated regulation of the Smad pathway in atRA-induced cleft palate. Toxicol Lett 2021; 341:51-58. [PMID: 33493612 DOI: 10.1016/j.toxlet.2021.01.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/05/2021] [Accepted: 01/18/2021] [Indexed: 12/15/2022]
Abstract
Palatal mesenchymal cell proliferation is essential to the process of palatogenesis, and the proliferation of mouse embryonic palate mesenchymal (MEPM) cells is impacted by both all-trans retinoic acid (atRA) and the TGF-β/Smad signaling pathway. The long non-coding RNA (lncRNA) MEG3 has been shown to activate TGF-β/Smad signaling and to thereby regulate cell proliferation, differentiation, and related processes. Herein, we found that atRA treatment (100 mg/kg) promoted Meg3 upregulation in MEPM cells, and that such upregulation was linked to the suppression of MEPM cell proliferation in the context of secondary palate fusion on gestational day (GD) 13 and 14. Moreover, the demethylation of specific CpG sites within the lncRNA Meg3 promoter was detected in atRA-treated MEPM cells, likely explaining the observed upregulation of this lncRNA. Smad signaling was also suppressed by atRA treatment in these cells, and RNA immunoprecipitation analyses revealed that Smad2 can directly interact with Meg3 in MEPM cells following atRA treatment. Therefore, we propose a model wherein Meg3 is involved in the suppression of MEPM cell proliferation, functioning at least in part via interacting with the Smad2 protein and thereby suppressing Smad signaling in the context of atRA-induced cleft palate.
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Affiliation(s)
- Xiaozhuan Liu
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yuwei Zhang
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Lijun Shen
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zhidong He
- School of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Yao Chen
- School of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Ning Li
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China
| | - Xiuli Zhang
- Division of Blood Vessel Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Tingting Zhang
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Suhua Gao
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Haodi Yue
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zhitao Li
- Medical College of Henan University of Science and Technology, Luoyang, Henan, China
| | - Zengli Yu
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China; School of Public Health, Zhengzhou University, Zhengzhou, Henan, China.
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