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Wang Y, Xiong G, Cai W, Tao Q. METTL1 facilitates ameloblastoma invasive growth via MAPK signaling pathway. Gene 2024; 905:148234. [PMID: 38309318 DOI: 10.1016/j.gene.2024.148234] [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: 10/01/2023] [Revised: 12/18/2023] [Accepted: 01/29/2024] [Indexed: 02/05/2024]
Abstract
OBJECTIVES Ameloblastoma (AM), a common odontogenic epithelial tumor, exhibits aggressive growth due to incomplete encapsulation within the jawbone. Postoperative recurrence is a significant concern, closely associated with its invasive nature. We investigate the role of tRNA N-7 methylguanosine (m7G) modification mediated by Methyltransferase-like 1 (METTL1) in AM's invasive growth and prognosis. MATERIALS AND METHODS METTL1 expression was analyzed in diverse cell lines and clinical AM tissues. Its association with postoperative AM recurrence was examined. Functional experiments included METTL1 gene silencing using shRNA in hTERT-AM cells, assessing cell proliferation, migration, and invasion. Xenograft tumor model was constructed to investigate tumor growth. Molecular mechanisms behind METTL1's role in AM invasiveness were elucidated using Ribosome nascent-chain complex-bound mRNA sequencing (RNC-seq) and experimental analysis. RESULTS High METTL1 expression was significantly associated with postoperative recurrence in AM. The inhibition of AM development following METTL1 knockdown has been corroborated by experiments conducted both in vitro and in vivo. Analysis of RNC-seq data revealed that downregulated genes were predominantly enriched in the mitogen-activated protein kinase (MAPK) signaling pathway, suggesting that METTL1 may promote AM's invasive growth through the MAPK signaling pathway. CONCLUSION Our study elucidates the functional role of METTL1 in AM's invasive development and prognosis. High METTL1 expression is linked to postoperative recurrence, and METTL1 appears to promote AM invasiveness through the MAPK signaling pathway. These findings contribute to a better understanding of AM pathogenesis and may guide future therapeutic strategies.
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Affiliation(s)
- Yue Wang
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China; Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Gan Xiong
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China; Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Weixin Cai
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China; Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Qian Tao
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China; Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China.
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Peraza Labrador A, Shrestha A, Gonzalez M, Marin NRG, Villacis M, Kesterke M, Lopez JP, Wright J. Recurrence of Glandular Odontogenic Cysts: A Systematic Review. Head Neck Pathol 2024; 18:31. [PMID: 38637356 PMCID: PMC11026356 DOI: 10.1007/s12105-024-01637-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 03/15/2024] [Indexed: 04/20/2024]
Abstract
BACKGROUND The glandular odontogenic cyst (GOC) is a benign developmental cyst of the jaws that is characterized by a high recurrence rate. METHODS A systematic review is presented of reported cases, case series, and retrospective studies of recurrent cases of glandular odontogenic cysts, to determine the overall and detailed demographic features with documentation of the specific histologic features of the initial presentation of each cyst. Searches of detailed databases were carried out to identify articles published in the English language from 1988 to 2023. The variables were demographics, patient symptoms, cyst location, radiographic features, histopathological findings, type of treatment, and minimum eight months of follow-up. RESULTS Eighteen cases were identified: with an equal gender presentation of 50% females and 50% males. The average age was 44.7. The mean size was 3.5 cm. The most common location was in the anterior mandible in 50% (n = 9) of cases, followed by the posterior mandible 27.8% (n = 5). Most patients were asymptomatic 55.6% (n = 10). The most common histologic features at first diagnosis were mucous cells in 88.9% (n = 16), variable thickness with 83.3% (n = 15), eosinophilic cuboidal cells 88.9% (n = 16), microcysts 83.3% (n = 15), and clear cells 77.8% (n = 14) cases. CONCLUSION GOC has an aggressive behavior. Evidence was not conclusive to link any single or combination of histologic features to recurrence, and the strongest correlation for recurrence was the type of treatment. Since this is an uncommon cyst, more cases are needed. Follow-up should continue for at least five years, because recurrences were higher between years 3 and 5.
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Affiliation(s)
- Alberto Peraza Labrador
- Department of Diagnostic Sciences, Texas A&M University School of Dentistry, 3302 Gaston Avenue, Dallas, TX, 75246, USA.
- , Acarigua, Portuguesa, 3303, Venezuela.
| | - Ashim Shrestha
- University of New Haven, 300 Boston Post Rd, Weste Haven, Connecticut, 06516, USA
| | - Marianela Gonzalez
- Oral Surgery Department, Texas A&M University School of Dentistry, 3302 Gaston Avenue, Dallas, TX, 75246, USA
| | | | - Marcelo Villacis
- Oral Surgery Department, International University of Ecuador, Jorge Fernández S/N, Quito, 170411, Ecuador
| | - Mathew Kesterke
- Department of Orthodontics, Texas A&M University School of Dentistry, Room 718, 3302, Gaston Avenue, Dallas, TX, 75246, USA
| | - Juan Pablo Lopez
- Oral Surgery Department, Hospital Fundación Santa Fe Bogota, Carrera 7Ma Numero 117-15, Bogota, Colombia
| | - John Wright
- Department of Diagnostic Sciences, Texas A&M University School of Dentistry, 3302 Gaston Avenue, Dallas, TX, 75246, USA
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Akinshipo AWO, Shanti RM, Adisa AO, Effiom OA, Adebiyi KE, Carrasco LR, Kaleem A, Arotiba GT, Akintoye SO. Time to Recurrence of Ameloblastoma and Associated Factors in a Multi-institutional Black Patient Cohort. J Racial Ethn Health Disparities 2024:10.1007/s40615-024-01927-z. [PMID: 38324239 DOI: 10.1007/s40615-024-01927-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 12/31/2023] [Accepted: 01/31/2024] [Indexed: 02/08/2024]
Abstract
Ameloblastoma is a highly recurrent odontogenic neoplasm with variable global distribution. However, impact of race and ethnicity on ameloblastoma recurrence are still unclear. The primary aim of this study was to assess duration of time between primary and recurrent ameloblastomas in a predominantly Black multi-institutional patient cohort and secondarily to determine whether recurrent ameloblastomas are more readily discovered when clinically-symptomatic rather than by radiographic surveillance. A retrospective cross-sectional design was used to evaluate demographic, clinical, and pathological information on recurrent ameloblastomas patients. Outcome variable was time to recurrence, determined as period between the diagnosis of primary and recurrent ameloblastomas. We assessed associations between outcome variable and race, time lapse between primary and recurrent ameloblastomas and clinical symptoms of recurrent ameloblastomas at time of diagnosis. Among 115 recurrent ameloblastomas identified, 90.5% occurred in adults, 91.3% in Blacks, and similarly, 91.3% were conventional ameloblastomas. About 41% affected the posterior mandible. 93.9% were clinically symptomatic at time of presentation while 6.1% non-symptomatic lesions were discovered by routine diagnostic radiology. Median time to presentation of recurrent tumor was significantly longer in females (90 months, p = 0.016) and clinically symptomatic group of ameloblastoma patients (75 months, p = 0.023). Ameloblastoma recurrence was distinctively high in Black patients, occurred faster in males than females and was located mostly in the posterior mandible. Concomitant with delayed access to healthcare of Black individuals, routine post-surgical follow-up is essential because time lag between primary and recurrence tumors was longer in clinically symptomatic ameloblastomas at the time of diagnosis.
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Affiliation(s)
- Abdul-Warith O Akinshipo
- Department of Oral and Maxillofacial Pathology/Biology, Faculty of Dental Sciences, University of Lagos, Lagos, Nigeria
| | - Rabie M Shanti
- Department of Oral and Maxillofacial Surgery, Rutgers School of Dental Medicine, Newark, NJ, USA
| | - Akinyele O Adisa
- Department of Oral Pathology, University of Ibadan and University College Hospital Ibadan, Ibadan, Nigeria
| | - Olajumoke A Effiom
- Department of Oral and Maxillofacial Pathology/Biology, Faculty of Dental Sciences, University of Lagos, Lagos, Nigeria
| | - Kehinde E Adebiyi
- Department of Oral Pathology & Oral Medicine, Faculty of Dentistry, Lagos State University College of Medicine Lagos, Lagos, Nigeria
| | - Lee R Carrasco
- Department of Oral and Maxillofacial Surgery, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Arshad Kaleem
- Head and Neck Oncology and Microvascular Surgery, High Desert Oral and Facial Surgery, El Paso, TX, USA
| | - Godwin T Arotiba
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, University of Lagos, Lagos, Nigeria
| | - Sunday O Akintoye
- Department of Oral Medicine, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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Anbinselvam A, Akinshipo AWO, Adisa AO, Effiom OA, Zhu X, Adebiyi KE, Arotiba GT, Akintoye SO. Comparison of diagnostic methods for detection of BRAFV600E mutation in ameloblastoma. J Oral Pathol Med 2024; 53:79-87. [PMID: 38185471 PMCID: PMC10872315 DOI: 10.1111/jop.13506] [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: 09/08/2023] [Revised: 12/06/2023] [Accepted: 12/14/2023] [Indexed: 01/09/2024]
Abstract
BACKGROUND Ameloblastoma is an aggressively growing, highly recurrent odontogenic jaw tumor. Its association with BRAFV600E mutation is an indication for BRAFV00E-inhibitor therapy The study objective was to identify a sensitive low-cost test for BRAFV600E-positive ameloblastoma. We hypothesized that immunohistochemical staining of formalin-fixed paraffin-embedded tissues for BRAFV600E mutation is a low-cost surrogate for BRAFV600E gene sequencing when laboratory resources are inadequate for molecular testing. METHODS Tissues from 40 ameloblastoma samples were retrieved from either formalin-fixed paraffin-embedded blocks, RNAlater™ stabilization solution or samples inadvertently pre-fixed in formalin before transfer to RNAlater™. BRAFV600E mutation was assessed by Direct Sanger sequencing, Amplification Refractory Mutation System-PCR and immunohistochemistry (IHC). RESULTS BRAFV600E mutation was detected by IHC, Amplification Refractory Mutation System-PCR and Direct Sanger sequencing in 93.33%, 52.5% and 30% of samples respectively. Considering Direct Sanger sequencing as standard BRAFV600E detection method, there was significant difference between the three detection methods (𝜒2 (2) = 31.34, p < 0.0001). Sensitivity and specificity of IHC were 0.8 (95% CI: 0.64-0.90) and 0.9 (95% CI: 0.75-0.99) respectively, while positive predictive value and negative predictive value (NPV) were 0.9 and 0.8 (Fischer's test, p < 0.0001) respectively. Sensitivity and specificity of Amplification Refractory Mutation System-PCR detection method were 0.7 (95% CI: 0.53-0.80) and 0.9 (95% CI = 0.67-0.98) respectively, while PPV and NPV were 0.9 and 0.6 respectively (Fischer's test, p < 0.0001). CONCLUSION Low-cost and less vulnerability of IHC to tissue quality make it a viable surrogate test for BRAFV600E detection in ameloblastoma. Sequential dual IHC and molecular testing for BRAFV600E will reduce equivocal results that could exclude some patients from BRAFV600E-inhibitor therapies.
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Affiliation(s)
- Arularasan Anbinselvam
- Department of Oral Medicine, School of Dental Medicine, University of Pennsylvania, Philadelphia PA
| | - Abdul-Warith O. Akinshipo
- Department of Oral and Maxillofacial Pathology/Biology, Faculty of Dental Sciences, University of Lagos, Lagos, Nigeria
| | - Akinyele O. Adisa
- University of Ibadan and University College Hospital Ibadan, Ibadan, Nigeria
| | - Olajumoke A. Effiom
- Department of Oral and Maxillofacial Pathology/Biology, Faculty of Dental Sciences, University of Lagos, Lagos, Nigeria
| | - Xinhe Zhu
- Department of Oral Medicine, School of Dental Medicine, University of Pennsylvania, Philadelphia PA
| | - Kehinde E. Adebiyi
- Department of Oral Pathology & Oral Medicine, Faculty of Dentistry. Lagos State University College of Medicine Lagos
| | - Godwin T. Arotiba
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, University of Lagos, Lagos, Nigeria
| | - Sunday O. Akintoye
- Department of Oral Medicine, School of Dental Medicine, University of Pennsylvania, Philadelphia PA
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Liu W, Zheng C, Zhang X, Hu H. Recurrence and malignant risk of ameloblastoma: A demographic study of 1626 cases from east China. Oral Oncol 2024; 148:106651. [PMID: 38061123 DOI: 10.1016/j.oraloncology.2023.106651] [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: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/25/2023]
Abstract
BACKGROUND Ameloblastoma is characterized by aggressive nature, high recurrence rate, occasional malignant transformation, but recurrence and malignant incidence of ameloblastoma are not yet addressed by a large-scale case series study. MATERIALS AND METHODS This study provided a detailed description of the relationship between demographic characteristics and recurrence and malignant cases with different clinical types of ameloblastoma (n = 1626). RESULTS The overall incidence of recurrence and malignancy was 17.2 % and 3.4 %, respectively. Notably, we observed that there were multiple recurrent episodes (mean time, 24.3-28.7 months) among ameloblastoma patients. Multivariate analysis revealed that age of > 45 years (odds ratios (OR), 2.10; 95 % confidence interval (CI), 1.17-3.76), male (OR, 3.24; 95 %CI, 1.49-6.99), maxilla (OR, 5.58; 95 %CI, 3.11-10.0), and pre-existing recurrence (OR, 3.79; 95 %CI, 2.05-7.01) as independent factors were associated significantly with increased risk of malignancy. CONCLUSION Identification of the clinical factors responsible for increased risk of malignancy provides better insight in management planning for ameloblastoma.
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Affiliation(s)
- Wei Liu
- Department of Oral and Maxillofacial-Head and Neck Oncology, Fengcheng Hospital of Fengxian District, Shanghai Ninth People's Hospital Fengcheng Branch Hospital, Shanghai, China; Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Chongyang Zheng
- Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Xinyu Zhang
- Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China.
| | - Hongjie Hu
- Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China.
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Noda Y, Sawada S, Sakagami T, Kojima Y, Higasa K, Tsuta K. Adenoid Ameloblastoma with BRAF p.V600E Mutation Revealing Ameloblastomatous Origin: A First Case Report. Head Neck Pathol 2023; 17:788-792. [PMID: 37093491 PMCID: PMC10514000 DOI: 10.1007/s12105-023-01555-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 04/12/2023] [Indexed: 04/25/2023]
Abstract
BACKGROUND Adenoid ameloblastoma (AdAM) is a frequently recurrent tumor that shows hybrid histological features of both ameloblastoma and adenomatoid odontogenic tumor (AOT). AdAM is expected to be classified as a new subtype of ameloblastoma in the next revision of the World Health Organization (WHO) odontogenic tumor classification. However, whether AdAM is a histologic variant of ameloblastoma or AOT remains unclear. To establish a new category, genetic evidence indicating the tumor category is necessary. METHODS We present a case of a 23-year-old Japanese woman with AdAM who underwent genetic/DNA analysis for ameloblastoma-related mutation using immunohistochemical staining, Sanger sequencing, and next-generation sequencing (NGS) analyses with reliable clinicopathological evidence. RESULTS Immunohistochemical expression of BRAF p.V600E was diffusely positive for both ameloblastoma- and AOT-like components. Sanger sequencing and NGS analyses showed missense mutations in BRAF p.V600E (c.1799T > A), a gene that is commonly altered in ameloblastomas but not in KRAS, another gene associated with AOT. CONCLUSION This case report is the first to provide genetic evidence on the ameloblastomatous origin of AdAM with a BRAF p.V600E mutation. A larger series of AdAM groups' molecular testing is needed to aptly classify them and prognosticate the best treatment.
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Affiliation(s)
- Yuri Noda
- Department of Pathology and Laboratory Medicine, Kansai Medical University Hospital, 2-3-1 Shin-Machi, Hirakata, Osaka, 573-1191, Japan.
- Department of Pathology, Kansai Medical University, 2-5-1 Shin-Machi, Hirakata, Osaka, 573-1010, Japan.
| | - Shunsuke Sawada
- Department of Dentistry and Oral Surgery, Kansai Medical University Hospital, 2-3-1 Shin-Machi, Hirakata, Osaka, 573-1191, Japan
| | - Tomofumi Sakagami
- Department of Otolaryngology, Head and Neck Surgery, Kansai Medical University Hospital, 2-3-1 Shin-Machi, Hirakata, Osaka, 573-1191, Japan
| | - Yuka Kojima
- Department of Dentistry and Oral Surgery, Kansai Medical University Hospital, 2-3-1 Shin-Machi, Hirakata, Osaka, 573-1191, Japan
| | - Koichiro Higasa
- Department of Genome Analysis, Institute of Biomedical Science, Kansai Medical University, 2-5-1 Shin-Machi, Hirakata, Osaka, 573-1010, Japan
| | - Koji Tsuta
- Department of Pathology and Laboratory Medicine, Kansai Medical University Hospital, 2-3-1 Shin-Machi, Hirakata, Osaka, 573-1191, Japan
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Rahman A, Faruk M, Rusdin MHS, Inriany N, Binekada IMC. Hemimaxillectomy defect reconstruction with a maxillary obturator prosthesis using a 3D-model stereolithography: A case report. Int J Surg Case Rep 2023; 108:108431. [PMID: 37354824 PMCID: PMC10382777 DOI: 10.1016/j.ijscr.2023.108431] [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: 05/24/2023] [Revised: 06/12/2023] [Accepted: 06/12/2023] [Indexed: 06/26/2023] Open
Abstract
INTRODUCTION Complete or partial resection of the maxilla during tumor surgery causes oronasal defects, leading to oral-maxillofacial dysfunction, for which the obturator prosthesis is an important treatment option. Traditional manufacturing of obturators involves great complexity, often results in impaired function and fit, and is time-consuming. This paper presents a case of using 3D stereolithography as a guide design for defect reconstruction with a maxillary obturator prosthesis. CASE PRESENTATION We report a 14-year-old girl who presented with facial deformities followed by swelling and pain that reached the orbit floor on the left side of her face. A non-contrast head magnetic resonance imaging scan showed a mass in the left maxilla that extended from the buccal mandible to the left side of the oral cavity. An incisional biopsy indicated that the mass was an ameloblastic fibroma. The entire tumor was treated with a hemi-maxillectomy and reconstruction using an obturator. No further complaints or recurrence signs were evident after six months. DISCUSSION Treatment options for ameloblastoma include enucleation and excision. Due to the severity of the lesion in our case, the entire maxilla had to be removed with the tumor, using a hemimaxillectomy with the assistance of a 3D-printed model, and an obturator was used for reconstruction. CONCLUSION Ameloblastoma is a tumor with a high risk of recurrence. This case underwent a complete hemi-maxillectomy with simultaneous repair using a 3D-printed obturator, with satisfactory functional and cosmetic outcomes.
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Affiliation(s)
- Abd Rahman
- Department of Surgery, Faculty of Medicine, Universitas Hasanuddin, Makassar, Indonesia.
| | - Muhammad Faruk
- Department of Surgery, Faculty of Medicine, Universitas Hasanuddin, Makassar, Indonesia.
| | - M Hidayat Sakti Rusdin
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Universitas Hasanuddin, Makassar, Indonesia.
| | - Nur Inriany
- Department of Prosthodontic, Faculty of Dentistry, Universitas Hasanuddin, Makassar, Indonesia.
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