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Abstract Objective Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) is a member of the carcinoembryonic antigen family. Although its expression has been found in chronic oral inflammatory epithelium, this study aimed to know whether CEACAM1 in oral keratinocytes participates in host immune response against Candida albicans . Methodology We investigated CEACAM1 expression in oral keratinocytes induced by C. albicans as well as by Candida cell wall component β-glucan particles (β-GPs). Furthermore, the effects of CEACAM1 on β-GPs-induced heme oxygenase-1 (HO-1) expression and its related signals were examined. Results Fluorescence staining showed CEACAM1 expression in oral keratinocytes (RT7) cells, whereas quantitative reverse transcription (RT)-PCR indicated that both live and heat-killed C. albicans increased CEACAM1 mRNA expression in RT7 cells. Examinations using quantitative RT-PCR and western blotting indicated that CEACAM1 expression was also increased by β-GPs derived from C. albicans . Specific siRNA for CEACAM1 decreased HO-1 expression induced by β-GPs from C. albicans as well as the budding yeast microorganism Saccharomyces cerevisiae . Moreover, knockdown of CEACAM1 decreased β-GPs-induced ROS activity in the early phase and translocation of Nrf2 into the nucleus. Conclusion CEACAM1 in oral keratinocytes may have a critical role in regulation of HO-1 for host immune defense during Candida infection.
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Objective To investigate the prognostic impact of carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) and CD34 on invasion and metastasis of gastric cancer.Methods CEACAM1 and CD34 expressions were detected by immunhistochemistry in 90 cases of gastric cancer and 30 cases of normal gastric mucosa.Then the relationship among CEACAM1, MVD marked by CD34 antibody and gastric cancer patients` clinical pathological features and prognosis were analyzed.Results The positive rates of CEACAM1 and CD34 protein in gastric cancer were significantly higher than those in normal gastric mucosa (P<0.05).The positive rate of CEACAM1 was closely related to histological differentiation, tumor invasion, nodal metastasis and TNM stage.MVD marked by CD34 was related with tumor size, histological differentiation, tumor invasion, nodal metastasis and TNM stage(P<0.05).Conclusions In gastric cancer, CEACAM1 and CD34 promote its invasion and metastasis, and they are potential indicators of predicting development and prognosis.
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Objective:To explore the effects of HIF-1α on the growth of transplanted oral cancer and on the expression of CEACAM1 and VEGF-C in the tumor.Methods:Nude mouse model of oral cancer was established by transplantation of Tca8113 cells respectively treated by HIF-1α siRNA and negative control siRNA subcutaneously into right axillary region of nude mice.3 weeks after transplantation the mice were sacrificed,the tumor volum and weight were measured.The tumor tissue was examined by ELISA method for the detection HIF-1α protein expression,by real-time quantitative PCR and western blot for the detection of mRNA and protein expression of HIF-1α,CEACAM1 and VEGF-C respectively.Results:The volume and weight of the transplanted tumor in HIF-1 α siRNA group were significantly less than those in the control group(P＜0.05),CEACAM1 and VEGF-C mRNA and protein were down-regulate in HIF-1α siRNA group (P＜0.05).Conclusion:HIF-1α expression is positively related to the expression of CEACAM1 and VEGF-C in the regulation of oral tumor growth.
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INTRODUCTION AND OBJECTIVE: The aim of the present study is the immunohistochemical assessment of tumor progression markers (E-cadherin, β-catenin, CEACAM-1 and PTEN) in primary cutaneous melanomas and their correlation with prognostic factors. METHOD: Primary lesions in patients with cutaneous melanoma were recorded as to clinical data (age, gender, location and metastases) and anatomopathologic data (Breslow, Clark level, margins, histological type, mitosis, ulceration, regression, satellitosis and TIL type). It was made a comparison between immunohistochemical expression of the markers and prognostic and anatomopathologic factors. RESULTS: Breslow thickness was > 1 mm (thick) in 21 patients (48.83 percent) and < 1 mm (thin) in 22 (51.16 percent). There was a higher CEACAM-1 positive expression in thick melanomas than in thin ones (p = 0.002). There was a more frequent E-cadherin (p = 0.008), b-catenin (p = 0.001) and PTEN (p = 0.005) positive expression in thin melanomas than in thick ones. There was a more frequent CEACAM-1 positive expression in superficial (p = 0.003) and deep (p = 0.002) samples of thick melanomas than in thin ones. No statistically significant differences between clinical and histopathological data were found when comparing patients with (n = 6) and without metastasis (n = 15). DISCUSSION AND CONCLUSION: There was a higher positivity for E-cadherin, b-catenin and PTEN in thin melanomas, whereas there was a higher positivity for CEACAM-1 in thick melanomas.
INTRODUÇÃO E OBJETIVO: O objetivo do presente estudo está na avaliação imuno-histoquímica de marcadores de progressão tumoral (E-caderina, β-catenina, CEACAM-1 e PTEN) em melanomas cutâneos primários e sua correlação com fatores prognósticos. MÉTODO: Lesões primárias de pacientes portadores de melanoma cutâneo foram tabuladas quanto a dados clínicos (idade, sexo, localização e metástases) e anatomopatológicos (Breslow, nível de Clark, margens, tipo histológico, mitoses, ulceração, regressão, satelitose e tipo de TIL). Foi realizada comparação da expressão imuno-histoquímica dos marcadores em estudo com fatores prognósticos clínicos e anatomopatológicos. RESULTADOS: Breslow foi > 1 mm (espesso) em 21 pacientes (48,83 por cento) e ≤ 1 mm (fino) em 22 (51,16 por cento). CEACAM-1 foi mais positivo em melanomas grossos que em finos (p = 0,002). E-caderina (p = 0,008), β-catenina (p = 0,001) e PTEN (p = 0,005) foram mais frequentemente positivos em melanomas finos que em grossos. CEACAM-1 foi mais frequentemente positivo nas porções superficiais (p = 0,003) e profundas (p = 0,002) dos melanomas grossos que nas dos finos. Não houve diferenças estatisticamente significativas entre dados clínicos e histopatológicos quando comparamos os pacientes com (n = 6) e sem (n = 15) metástases. DISCUSSÃO E CONCLUSÃO: Observou-se maior tendência de positividade para E-caderina, b-catenina e PTEN em melanomas finos. Por sua vez, CEACAM-1 demonstrou maior frequência de positividade nos melanomas grossos.