Histology and histopathology Vol.33, nº3 (2018)
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- PublicationOpen AccessInterleukin 6 receptor (IL-6R) was an independent prognostic factor in cervical cancer(Universidad de Murcia. Departamento de Biología Celular e Histología, 2018) Luan, Shaohong; An, Zhijie; Bi, Shuna; Chen, Long; Fan, JunIL-6 has been found to be associated with poor response to chemoradiotherapy and poor overall prognosis of patients with cervical cancer. However, little is known about the clinicopathological significance of IL-6 receptor (IL-6R) expression in the setting of cervical cancer. To investigate the clinicopathological meaning of IL-6R in cervical cancer, expression of IL6R was detected using immunohistochemistry in cervical cancer tissue microarray composed of 98 cases of cervical cancer and paired normal controls. As further confirmation of expression trend, western-blotting was conducted in another independent 36 pairs of cervical cancer and matched normal controls. Subsequently, the statistical correlation between IL-6R expression and clinicopathological variables was analyzed, including demographic, TNM stage, clinical grading and overall prognosis. IL-6R expression was shown to be remarkably associated with lymph node metastasis, recurrence and overall prognosis. Moreover, only IL-6R expression was observed to be an independent prognostic factor among these variables that could potentially influence the overall prognosis of patients with cervical cancer. In conclusion, IL-6R was shown to be an independent prognostic factor for patients with cervical cancer.
- PublicationOpen AccessThe role of RhoC in malignant tumor invasion, metastasis and targeted therapy(Universidad de Murcia. Departamento de Biología Celular e Histología, 2018) Guan, Xue; Chen, Shuo; Zhao, YangAs an important member of the RhoGTPase family, RhoC has various biological functions, such as regulating cytoskeleton reorganization, influencing cell adhesion, and migration. During recent decades, RhoC has been proven to be involved in the invasion and metastasis of malignant tumor and is thus a promising target of tumor therapy. This review focuses on the molecular mechanism of RhoC in invasion and metastasis of malignant tumors, as well as its research prospects as a potential target for tumor therapy.
- PublicationOpen AccessExpression of CD34 and CD146 vascular markers contributes to the immunological function of the human palatine tonsil(Universidad de Murcia. Departamento de Biología Celular e Histología, 2018) Jovic, Marko; Avramović, Verica; Vlahović, Predrag; Velickov, Aleksandra; Petrović, VladimirThe fundamental function of the palatine tonsil is the immune response to airborne and foodborne pathogenic agents. Small blood vessels have an important role in the provision of a special microenvironment in which the immune response occurs. In this study, we investigated the expression of vascular markers CD34 and CD146 and basal lamina marker - type IV collagen - in the small blood vessels of the human palatine tonsil in the context of their role in the immunological function of the tonsil. The tonsils were collected after tonsillectomy from ten patients with chronic tonsillitis, aged 18-28 years. Five-µm-thick paraffin sections were routinely stained with haematoxylin and eosin, while the studied markers (CD34, CD146 and type IV collagen) were detected immunohistochemically using LSAB2/HRP method. CD34 was expressed equally in the capillaries within and below the crypt epithelium, in lymphoid follicles and in high endothelial venules localized para- and interfollicularly. CD146 molecule was expressed on the luminal surface of endothelial cells in the capillaries of the crypt epithelium, while its expression in high endothelial venules was seen on the luminal and lateral surfaces of the cuboidal endothelial cells. In contrast to the basal lamina of intraepithelial capillaries, where collagen IV-immunopositivity is mostly seen as a continuing line, the basal lamina of high endothelial venules was seen as a two- or three-layered structure beneath the cuboidal endothelial cells. The specifics of expression of CD34, CD146, and type IV collagen confirm the morphofunctional specialization of endothelium in crypt epithelium capillaries, and also in endothelium of high endothelial venules, which is directly associated with the role of these vessels in the immune function of the tonsil.
- PublicationOpen AccessHigh-grade renal cell carcinoma with emperipolesis: Clinicopathological, immunohistochemical and molecular-genetic analysis of 14 cases(Universidad de Murcia. Departamento de Biología Celular e Histología, 2018) Rotterova, Pavla; Martinek, Petr; Alaghehbandan, Reza; Prochazkova, Kristyna; Damjanov, Iván; Rogala, Joanna; Suster, Saul; Perez Montiel, Delia; Alvarado Cabrero, Isabel; Sperga, Maris; Švajdler, Marián; Michalova, Kvetoslava; Pivovarcikova, Kristyna; Daum, Ondrej; Hora, Milan; Dusek, Martin; Ondic, Ondrej; Stehlikova, Adela; Michal, Michal; Hes, OndrejEmperipolesis has recently been described as a constant feature of “biphasic squamoid” papillary renal cell carcinoma (BPRCC). We also noticed this in some high-grade (HG) RCC, which promoted the present study to estimate the incidence of emperipolesis in RCCs and to describe them in further detail. 14 cases of HGRCC showing emperipolesis were retrieved from our registry. Microscopic examination of filed slides was supplemented with immunohistochemical and molecular-genetic analyses using paraffin embedded tissue. 12 of 14 patients were males with a mean age of 58.6 years (range 41-72 years). Tumor size ranged from 6-16.5 cm (mean of 8.8 cm). Follow up data were available for 8/14 patients (range 0.5-10 years). Metastases were documented in 6 cases. All tumors showed solid-alveolar growth patterns with focal pseudopapillary features, and were composed of large cells with bizarre nuclei and eosinophilic rhabdoid-like cytoplasm. Emperipolesis was a constant and prominent feature in large bizarre cells. All cases were positive for OSCAR, CANH 9, vimentin, cyclin D1, INI-1, and myoD1, while negative for melanocytic markers, CK 7, myoglobin, cathepsin K, and TFE3. VHL gene abnormalities were found in 6/9 analyzable cases, of which 2 demonstrated polysomy of chromosomes 7, 17. Emperipolesis is a rare histomorphologic feature which can be seen not only in BPRCCs but also in highgrade CCRCCs. All RCC cases with prominent emperipolesis fulfilled both morphologic and immunohistochemical diagnostic criteria of high-grade CCRCC. The majority of patients with available follow up information developed metastases.
- PublicationOpen AccessThe tick-derived rBmTI-A protease inhibitor attenuates the histological and functional changes induced by cigarette smoke exposure(Universidad de Murcia. Departamento de Biología Celular e Histología, 2018) Lourenço, Juliana D.; Ito, Juliana T.; Cervilha, Daniela A.B.; Sales, Davi S.; Riani, Alyne; Suehiro, Camila L.; Genaro, Isabella S.; Duran, Adriana; Puzer, Luciano; Martins, Milton A.; Sasaki, Sérgio D.; Lopes, Fernanda D.T.Q.S.Introduction. Smoking is the main risk factor for chronic obstructive pulmonary disease development and cigarette smoke (CS) exposure is considered an important approach to reproduce in rodents this human disease. We have previously shown that in an elastase-induced model of emphysema, the administration of a protease inhibitor (rBmTI-A) prevented and attenuated tissue destruction in mice. Thus, in this study we aimed to verify the effects of rBmTI-A administration on the physiopathological mechanisms of CS-induced emphysema. Methods. Mice (C57BL/6) were exposed to CS or room air for 12 weeks. In this period, 3 nasal instillations of rBmTI-A inhibitor or its vehicle were performed. After euthanasia, respiratory mechanics were evaluated and lungs removed for analysis of mean linear intercept, volume proportion of collagen and elastic fibers, density of polymorphonuclear cells, macrophages, and density of positive cells for MMP-12, MMP-9, TIMP-1 and gp91phox. Results. The rBmTI-A administration improved tissue elastance, decreased alveolar enlargement and collagen fibers accumulation to control levels and attenuated elastic fibers accumulation in animals exposed to CS. There was an increase of MMP12, MMP-9 and macrophages in CS groups and the rBmTIA only decreased the number of MMP-12 positive cells. Also, we demonstrated an increase in gp91phox in CS treated group and in TIMP-1 levels in both rBmTI-A treated groups. Conclusion. In summary, the rBmTI-A administration attenuated emphysema development by an increase of gp91phox and TIMP-1, accompanied by a decrease in MMP-12 levels.