AIM： To investigate the clinicopathological roles of Bmil in esophageal squamous cell carcinoma （ESCC）.METHODS： Quantitative real-time polymerase chain reaction and immunohistochemical staining for Broil were perf...AIM： To investigate the clinicopathological roles of Bmil in esophageal squamous cell carcinoma （ESCC）.METHODS： Quantitative real-time polymerase chain reaction and immunohistochemical staining for Broil were performed in cancerous and adjacent non-cancerous paraffin-embedded esophageal specimens.RESULTS： The Bmil expression level was unaffected by gender and age. The level of Broil mRNA in ESCC was significantly higher than that in the adjacent non-cancerous tissues （2.181 ± 2.158 vs 0.931 ± 0.894, P = 0.0152）, and its over-expression was aggressively associated with lymph node metastasis （3.580 ± 2.487 vs 1.703 ± 0.758, P = 0.0003）, poorer cell differentiation （P = 0.0000） and advanced pathological stage （3.827± 2.673 vs 1.590 ± 0.735, P = 0.0001）. The patients were divided into high-expression and low-expression groups based on the median expression level of Bmi1 mRNA, and a shorter overall survival time in the former group was observed. Immunohistochemistry for Bmi1 oncoprotein showed diffusely positive, focally positive and negative expression in 44, 16 and 10 of 70 ESCC cases, respectively, compared with three, two and five of 10 adjacent non-cancerous cases （P = 0.027）. The positive rate of the oncoprotein in samples of histological grade Ⅲ was higher than that of grade Ⅱ（P = 0.031）, but its expression had no relation to the lymph node metastasis and pathological staging. In 70 ESCC samples, Bmi1 showed high intense expression in the cytoplasm and less or even no expression in the nucleus.CONCLUSION： Bmi1 was over-expressed in ESCC. Increased Bmi1 mRNA expression was significantly associated with ESCC progression, and the oncoprotein was largely distributed in the cytoplasm of tumor cells.展开更多
文摘【目的】研究慢性热应激对黄羽肉鸡肝脏和肌肉的抗氧化能力与内质网应激以及腓肠肌肌纤维类型的影响.【方法】试验选用20只47日龄黄羽肉鸡,随机分为常温组和慢性热应激组,每组10只.鸡只饲养在人工气候室,试验期30 d.试验结束采集血液、肝脏和腓肠肌样品,利用试剂盒法检测血清生化指标、血清激素以及血清和肝脏抗氧化指标.利用实时荧光定量PCR法检测内质网应激(Endoplasmic reticulum stress,ERS)相关基因和腓肠肌不同肌纤维肌球蛋白重链(Myosin heavy chain,My HC)基因mRNA的表达.【结果和结论】慢性热应激显著降低肉鸡平均日增质量、血清甘油三酯(TG)、甲状腺激素(T3和T4)、胰岛素样生长因子1(Insulin-like growth factor 1,IGF-1),显著升高血清皮质酮(CORT)水平(P<0.05).同时,慢性热应激显著升高血清中丙二醛(MDA)含量,降低血清和肝脏谷胱甘肽过氧化物酶(GSH-PX)活性和肝脏总抗氧化能力(T-AOC)(P<0.05).此外,慢性热应激显著提高肉鸡肝脏和腓肠肌中热休克蛋白70(Heat shock protein 70,HSP70)基因以及腓肠肌中转录激活因子4(Activating transcription factor 4,ATF4)基因mRNA的表达(P<0.05),降低腓肠肌中葡萄糖调节蛋白78(Glucose-regulated protein 78,GRP78)基因mRNA的表达,而对肝脏中ATF4和GRP78基因mRNA的表达量无显著影响.最后,慢性热应激显著降低腓肠肌慢肌(Slow myofiber,SM)My HC基因mRNA表达量(P<0.05)而对快红肌(Fast red myofiber,FRM)和快白肌(Fast white myofiber,FWM)My HC基因mRNA表达量无影响.研究结果提示,慢性热应激可能通过降低血清生长和代谢激素、机体抗氧化能力以及引发细胞内质网应激影响肉鸡生长和腓肠肌纤维类型.
基金Supported by Nanjing First Hospital,Nanjing Medical University and Nanjing Health Bureau,No. ZKX0114
文摘AIM： To investigate the clinicopathological roles of Bmil in esophageal squamous cell carcinoma （ESCC）.METHODS： Quantitative real-time polymerase chain reaction and immunohistochemical staining for Broil were performed in cancerous and adjacent non-cancerous paraffin-embedded esophageal specimens.RESULTS： The Bmil expression level was unaffected by gender and age. The level of Broil mRNA in ESCC was significantly higher than that in the adjacent non-cancerous tissues （2.181 ± 2.158 vs 0.931 ± 0.894, P = 0.0152）, and its over-expression was aggressively associated with lymph node metastasis （3.580 ± 2.487 vs 1.703 ± 0.758, P = 0.0003）, poorer cell differentiation （P = 0.0000） and advanced pathological stage （3.827± 2.673 vs 1.590 ± 0.735, P = 0.0001）. The patients were divided into high-expression and low-expression groups based on the median expression level of Bmi1 mRNA, and a shorter overall survival time in the former group was observed. Immunohistochemistry for Bmi1 oncoprotein showed diffusely positive, focally positive and negative expression in 44, 16 and 10 of 70 ESCC cases, respectively, compared with three, two and five of 10 adjacent non-cancerous cases （P = 0.027）. The positive rate of the oncoprotein in samples of histological grade Ⅲ was higher than that of grade Ⅱ（P = 0.031）, but its expression had no relation to the lymph node metastasis and pathological staging. In 70 ESCC samples, Bmi1 showed high intense expression in the cytoplasm and less or even no expression in the nucleus.CONCLUSION： Bmi1 was over-expressed in ESCC. Increased Bmi1 mRNA expression was significantly associated with ESCC progression, and the oncoprotein was largely distributed in the cytoplasm of tumor cells.
