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Myofibroblasts in Odontogenic Cysts and Tumors: An Immunohistochemical Study. 牙源性囊肿和肿瘤中的肌成纤维细胞:免疫组织化学研究。
Q3 Medicine
Journal of Microscopy and Ultrastructure
Pub Date : 2023-01-01 DOI: 10.4103/jmau.jmau_64_21
Soujanya Pinisetti, Durgaprasad Tadi, Ravikanth Manyam

Objective: The objective of this study was to assess immunohistochemically the presence of myofibroblasts both qualitatively and quantitatively in odontogenic cysts and tumors and to compare with the control cases of squamous cell carcinoma and to correlate the results with biologic behavior of these lesions.

Materials and methodology: Formalin-fixed, paraffin-embedded blocks of odontogenic cysts and tumors were retrieved from institutional archives. The sample size is 40; these include ten cases of odontogenic keratocyst (OKC) (n = 10), five cases of dentigerous cyst (n = 5), ten cases of solid ameloblastoma (n = 10), and five cases of unicystic ameloblastoma (n = 5). Ten cases of squamous cell carcinoma (n = 10) served as control. Sections were taken and stained immunohistochemically using alpha-smooth muscle actin for evaluation of myofibroblasts. The number of positive stromal cells was evaluated both for quantitative and qualitative analyses.

Results: The present study showed that the mean number of myofibroblasts among the odontogenic cysts and tumors was higher in locally aggressive lesions such as OKC (23.79 ± 19.95), solid ameloblastoma (26.38 ± 17.00), and unicystic ameloblastoma (20.74 ± 14.86) which were comparable to squamous cell carcinoma (21.49 ± 9.76) when compared to benign lesions like dentigerous cyst which showed the least number of myofibroblasts (13.1 ± 7.71). Qualitatively, the staining intensity of myofibroblasts showed a significant variation within the same lesion and among different lesions. There was a distinct difference in the morphology, pattern of arrangement, and distribution of myofibroblasts among the studied lesions.

Conclusion: We conclude that the increase in the number of myofibroblasts could be one of the contributory factors for the locally aggressive behavior of benign lesions such as ameloblastomas and OKCs. Further studies are suggested to understand the mechanism by which these important cellular elements exert their effects on stromal and epithelial tissue compartments.

目的:本研究的目的是通过免疫组织化学方法定性和定量地评估牙源性囊肿和肿瘤中肌成纤维细胞的存在，并与鳞状细胞癌的对照病例进行比较，并将结果与这些病变的生物学行为联系起来。材料和方法:从机构档案中检索福尔马林固定，石蜡包埋的牙源性囊肿和肿瘤块。样本量为40人;其中，牙源性角化囊肿10例(n = 10)，牙源性囊肿5例(n = 5)，实体性成釉细胞瘤10例(n = 10)，单囊性成釉细胞瘤5例(n = 5)，鳞状细胞癌10例(n = 10)作为对照。取切片并用α -平滑肌肌动蛋白免疫组织化学染色评价肌成纤维细胞。对阳性基质细胞的数量进行定量和定性分析。结果:局部侵袭性病变如OKC(23.79±19.95)、实性成釉细胞瘤(26.38±17.00)、单囊性成釉细胞瘤(20.74±14.86)与鳞状细胞癌(21.49±9.76)相当，在牙源性囊肿和牙源性肿瘤中肌成纤维细胞的平均数目高于良性病变如牙源性囊肿(13.1±7.71)。定性地说，肌成纤维细胞的染色强度在同一病变内和不同病变间表现出显著的差异。在研究的病变中，肌成纤维细胞的形态、排列模式和分布有明显的差异。结论:我们得出结论，肌成纤维细胞数量的增加可能是成釉细胞瘤和OKCs等良性病变局部侵袭性行为的因素之一。进一步的研究建议了解这些重要的细胞成分发挥其作用的机制间质和上皮组织室。
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引用次数: 0
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Q3 Medicine
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Q3 Medicine
Journal of Microscopy and Ultrastructure
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Q3 Medicine
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引用次数: 0
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