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Yoshimoto S, Okamura K. Tumor microenvironment of ameloblastoma with a focus on osteoclastogenesis, cell migration, and malignant transformation. J Oral Biosci 2024; 66:314-319. [PMID: 38734178 DOI: 10.1016/j.job.2024.05.002] [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: 03/26/2024] [Revised: 05/02/2024] [Accepted: 05/07/2024] [Indexed: 05/13/2024]
Abstract
BACKGROUND Odontogenic tumors arise in the jawbone and originate from cells associated with tooth development. Therefore, understanding odontogenic tumors requires knowledge of all aspects of dental research, including tooth development and eruption. Ameloblastoma is the most common odontogenic tumor. HIGHLIGHT Although a benign tumor, ameloblastoma progresses with marked jawbone resorption. Because of its locally aggressive features, it can be treated surgically by resecting the surrounding bone. From a molecular pathology perspective, several genetic mutations and dysregulated signaling pathways involved in ameloblastoma tumorigenesis have been identified. Histopathologically, ameloblastomas consist of peripheral ameloblast-like cells and an inner stellate reticulum. The stromal region consists of fibrovascular connective tissue, showing a characteristic sparse myxoid histology. In general, the tumor microenvironment, including the surrounding non-tumor cells, contributes to tumorigenesis and progression. In this review, we focus on the tumor microenvironment of ameloblastomas. In addition, we present some of our recent studies on osteoclastogenesis, tubulin acetylation-induced cell migration, and hypoxia-induced epithelial-mesenchymal transition in ameloblastomas. CONCLUSION Further research on ameloblastomas can lead to the development of new treatments and improve patients' quality of life.
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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.
| | - Kazuhiko Okamura
- Section of Pathology, Department of Morphological Biology, Division of Biomedical Sciences, Fukuoka Dental College, Fukuoka, Japan
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Wang X, Wu Z, Zhang Y, Lian B, Ma L, Zhao J. Autophagy induced by hypoxia in pulpitis is mediated by HIF-1α/BNIP3. Arch Oral Biol 2024; 159:105881. [PMID: 38199116 DOI: 10.1016/j.archoralbio.2024.105881] [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: 11/11/2023] [Revised: 01/01/2024] [Accepted: 01/02/2024] [Indexed: 01/12/2024]
Abstract
OBJECTIVE Hypoxia-inducible factor-1α (HIF-1α) and its downstream factor, 19 kDa BCL-2 interacting protein 3 (BNIP3), promote cellular autophagy under hypoxic conditions. However, their roles in pulpitis are unclear. Therefore, the changes in inflammatory response and autophagy levels caused by hypoxia during pulpitis were evaluated. Additionally, the regulatory mechanism of HIF-1α/BNIP3 in cellular autophagy in pulpitis was explored. DESIGN Pulp from dental pulp tissues of healthy individuals and patients with pulpitis (n = 10) were exposed and combined with a low oxygen simulation chamber to construct pulpitis (n = 6), hypoxia (n = 6), and hypoxia+pulpitis (n = 6) rat models. Hematoxylin and eosin and immunohistochemical staining were used to detect the localization and expression levels of HIF-1α, BNIP3, and autophagy marker protein, LC3B. Transmission electron microscopy was used to confirm autophagosome formation. An in vitro hypoxic model of human dental pulp cells was established, and HIF-1α chemical inhibitor 3-(5'-hydroxymethyl-2'-furyl)- 1-benzylindazole (YC-1) was administered. Immunofluorescence and western blotting were used to detect the localization and protein levels of HIF-1α, BNIP3, and LC3B. RESULTS Autophagy is significantly increased and HIF-1α and BNIP3 are elevated in inflamed dental pulp tissue. Both pulp exposure and hypoxia intervention cause inflammatory reactions in rat dental pulp tissue, accompanied by the autophagy activation. Hypoxia significantly enhances HIF-1α/BNIP3 and autophagy activation. BNIP3 downregulates and autophagy reduces after treatment with YC-1. CONCLUSIONS In pulpitis, activation of the HIF-1α/BNIP3 signaling pathway driven by hypoxia leads to increased autophagy. This provides a new molecular explanation for autophagy activation in apical periodontitis and new insights into the pathogenesis of the disease.
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Affiliation(s)
- Xiaohe Wang
- Department of Cariology and Endodontics, The First Affiliated Hospital of Xinjiang Medical University (The Affiliated Stomatology Hospital of Xinjiang Medical University), No. 137 South Liyushan Road, Urumqi 830054, People's Republic of China; Xinjiang Uygur Autonomous Region Clinical Research Center for Oral Diseases, No.137 South Liyushan Road, Urumqi 830054, People's Republic of China
| | - Zeyu Wu
- Department of Cariology and Endodontics, The First Affiliated Hospital of Xinjiang Medical University (The Affiliated Stomatology Hospital of Xinjiang Medical University), No. 137 South Liyushan Road, Urumqi 830054, People's Republic of China; Xinjiang Uygur Autonomous Region Clinical Research Center for Oral Diseases, No.137 South Liyushan Road, Urumqi 830054, People's Republic of China; Stomatology Disease Institute of Xinjiang Uyghur Autonomous Region, No.137 South Liyushan Road, Urumqi 830054, People's Republic of China
| | - Yangyang Zhang
- Department of Cariology and Endodontics, The First Affiliated Hospital of Xinjiang Medical University (The Affiliated Stomatology Hospital of Xinjiang Medical University), No. 137 South Liyushan Road, Urumqi 830054, People's Republic of China; Xinjiang Uygur Autonomous Region Clinical Research Center for Oral Diseases, No.137 South Liyushan Road, Urumqi 830054, People's Republic of China
| | - Bingjie Lian
- Department of Cariology and Endodontics, The First Affiliated Hospital of Xinjiang Medical University (The Affiliated Stomatology Hospital of Xinjiang Medical University), No. 137 South Liyushan Road, Urumqi 830054, People's Republic of China; Xinjiang Uygur Autonomous Region Clinical Research Center for Oral Diseases, No.137 South Liyushan Road, Urumqi 830054, People's Republic of China; Stomatology Disease Institute of Xinjiang Uyghur Autonomous Region, No.137 South Liyushan Road, Urumqi 830054, People's Republic of China
| | - Li Ma
- Department of Cariology and Endodontics, The First Affiliated Hospital of Xinjiang Medical University (The Affiliated Stomatology Hospital of Xinjiang Medical University), No. 137 South Liyushan Road, Urumqi 830054, People's Republic of China; Xinjiang Uygur Autonomous Region Clinical Research Center for Oral Diseases, No.137 South Liyushan Road, Urumqi 830054, People's Republic of China
| | - Jin Zhao
- Department of Cariology and Endodontics, The First Affiliated Hospital of Xinjiang Medical University (The Affiliated Stomatology Hospital of Xinjiang Medical University), No. 137 South Liyushan Road, Urumqi 830054, People's Republic of China; Xinjiang Uygur Autonomous Region Clinical Research Center for Oral Diseases, No.137 South Liyushan Road, Urumqi 830054, People's Republic of China; Stomatology Disease Institute of Xinjiang Uyghur Autonomous Region, No.137 South Liyushan Road, Urumqi 830054, People's Republic of China.
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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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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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Jain A, Sharma P, Sivakumar N, Devi P, Gupta S, Chandra S. Role of HIF-1α in Ameloblastoma: A Systematic Review. Indian J Otolaryngol Head Neck Surg 2023; 75:3136-3145. [PMID: 37974737 PMCID: PMC10646133 DOI: 10.1007/s12070-023-03928-6] [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: 05/04/2023] [Accepted: 05/31/2023] [Indexed: 11/19/2023] Open
Abstract
Hypoxia-inducible factor-1α is a transcriptional protein that has been extensively researched in human cancers whose overexpression is found to be associated with unfavorable prognosis. Contemporary studies have proved its vital role in ameloblastoma by correlating its expression with the aggressiveness of the tumor. Therefore, an attempt was made to explore its significance in the malignant transformation and prognosis of ameloblastoma. The present systematic review aimed to understand the impact of HIF-1α in AMB which might lead to favorable outcomes in the treatment. An electronic search was carried out using PubMed, Scopus, Google scholar, Cochrane library, and EMBASE databases. Original articles from all languages involving HIF-1α in AMB were scrutinized by two independent authors. Data were compiled and tabulated in Microsoft Excel and the Risk of bias was analyzed using the JBI tool. Twelve eligible articles were included for the quantitative analysis comprising 305 cases of AMB in which HIF-1α expression was studied for various characteristics like pattern, intensity, and site of immunoexpression which were found to be increased with an increase in the aggressiveness of AMB. It was concluded that HIF-1α is proven to have a crucial role in the progression and aggressiveness of AMB. Extended research regarding the crucial role of HIF-1α in the initiation of tumors and therapies aiming at HIF-1α in AMB cases might show promising outcomes in the future.
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Affiliation(s)
- Ayushi Jain
- Dept of Oral Pathology & Microbiology and Forensic Odontology, King George’s Medical University, Lucknow, 226003 UP India
| | - Pooja Sharma
- Dept of Oral Pathology & Microbiology and Forensic Odontology, King George’s Medical University, Lucknow, 226003 UP India
| | - N Sivakumar
- Dept of Oral Pathology & Microbiology and Forensic Odontology, CDER, All India Institute of Medical Sciences, New Delhi, India
| | - Priya Devi
- Dept of Oral Pathology & Microbiology and Forensic Odontology, King George’s Medical University, Lucknow, 226003 UP India
| | - Shalini Gupta
- Dept of Oral Pathology & Microbiology and Forensic Odontology, King George’s Medical University, Lucknow, 226003 UP India
| | - Shaleen Chandra
- Dept of Oral Pathology & Microbiology and Forensic Odontology, King George’s Medical University, Lucknow, 226003 UP India
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