【摘要】 目的 觀察機械通氣對黏蛋白（mucin，MUC）-5AC表達的影響及復方川貝精片的干預作用。 方法 新西蘭兔25只，6個月齡，雄性；隨機分為對照組、機械通氣12 h組及復方川貝精片低、中、高劑量組。收集支氣管灌洗液，分別采用實時熒光定量聚合酶鏈式反應法和酶聯免疫吸附試驗檢測支氣管灌洗液中p38 MAPK mRNA，MUC-5AC蛋白和mRNA的表達。 結果 機械通氣能增強MUC-5AC的分泌（Plt;0.05）；加用復方川貝精片能降低機械通氣后MUC-5AC蛋白和mRNA的表達（Plt;0.05）；復方川貝精片中、高劑量組與低劑量組比較，能降低機械通氣后MUC-5AC蛋白和mRNA的表達（Plt;0.05）。 結論 機械通氣能促進支氣管黏膜上皮細胞分泌MUC-5AC，復方川貝精片能抑制機械通氣所致MUC-5AC表達升高，其機制可能與其抑制p38 MAPK表達有關。【Abstract】 Objective To observe the effect of mechanical ventilation by breathing machine on the expression of mucin (MUC-5AC) and the interfering effect of compound tablet of fritillary bulb. Methods New Zealand Rabbits were randomly divided into control group, twelve-hour mechanical ventilation group, and low, medium and high-dose compound tablet of fritillary bulb group. Contents of p38 MAPK mRNA, MUC-5AC mRNA and protein in bronchial irrigating solution were detected by realtime RT-PCR and ELISA methods. Results Mechanical ventilation could increase the expression of MUC-5AC in bronchial irrigating solution (Plt;0.05). Compound tablet of fritillary bulb could decrease the expression of MUC-5AC mRNA and protein after mechanical ventilation (Plt;0.05). Compared with low-dose compound tablet of fritillary bulb group, the expression of MUC-5AC mRNA and protein was lower for the high and medium-dose groups (Plt;0.05). Conclusions Mechanical ventilation can promote the expression of MUC-5AC in bronchial endothelial cells, which can be suppressed by compound tablet of fritillary bulb. This may be due to the suppression effect of p38 MAPK expression.
【摘要】 目的 探討乳腺浸潤性導管癌中表皮鈣黏蛋白（E-cadherin，E-cad）的表達及其意義。 方法 選取2005年1月－2009年12月的組織病理切塊，用免疫組織化學EnVision二步法檢測63例乳腺浸潤性導管癌（invasive ductal carcinoma，IDC）組織中E-cad的表達情況，設為IDC組；另檢測15例乳腺纖維腺瘤及15例乳腺小葉增生癥乳腺組織中E-cad的表達情況，設為對照組；比較兩組的E-cad表達。 結果 E-cad在IDC組及對照組中表達陽性率分別為58.7%、80.0%；兩組間差異有統計學意義（Plt;0.05）。在乳腺IDC患者中，年齡lt;38歲和≥38歲組的E-cad陽性表達率分別是54.2%、61.5%，兩組間差異無統計學意義（Pgt;0.05）；腫塊直徑lt;3 cm和≥3 cm組的E-cad陽性表達率分別是54.8%、66.7%，兩組間差異無統計學意義（Pgt;0.05）；組織學分級為Ⅰ+Ⅱ級和Ⅲ級組的E-cad陽性表達率分別是76.3%、32.0%，兩組間差異有統計學意義（Plt;0.05）；無、有腋窩淋巴結轉移組的E-cad陽性表達率分別是78.3%、47.5%，兩組間差異有統計學意義（Plt;0.05）。 結論 E-cad的表達與患者年齡及腫塊大小無關，而與組織學分級、淋巴結轉移相關。在乳腺浸潤性導管癌中，無淋巴結轉移者E-cad表達高于有淋巴結轉移者，提示E-cad是乳腺浸潤性導管癌發生淋巴結轉移的重要指標。【Abstract】 Objective To explore the expression of the protein E-cadherin (E-cad) in invasive ductal carcinoma (IDC) of the breast and its significance. Methods We chose 63 cases of pathological wax with IDC between 2005 and 2009, and immunohistochemical EnVision method was used to detect the expression of E-cad protein in these cases which were designated to be the IDC group. At the same time, the E-cad expression in 15 cases of breast adenoma and another 15 cases of breast lobular hyperplasia were also detected, and these cases were designed to the the control group. The expression of E-cad in these two groups were compared. Results The positive rates of E-cad protein expression in the IDC group and the control group were respectively 58.7% and 80.0% with a significant difference between the two groups (Plt;0.05). In the IDC group, the positive rates of E-cad protein expression in patients agedlt;38 and ≥38 years old were respectively 54.2% and 61.5% without a significant difference (Pgt;0.05). The positive rates of E-cad protein expression for tumors with a diameter lt;3 cm and ≥3 cm were respectively 54.8% and 66.7% without a significant difference (Pgt;0.05). The positive rates of E-cad protein expression for class Ⅰ+Ⅱ tumors and class Ⅲ tumors were respectively 76.3% and 32.0% with a significant difference (Plt;0.05). The positive rates of E-cad protein expression for patients without and with axillary lymph node metastasis were respectively 78.3% and 47.5% with a significant difference (Plt;0.05). Conclusions The expression of E-cad is correlated with histological classification and lymph node metastasis and was not related to tumor size and age of the patients. The expression of E-cad is higher in IDC patients without lymph node metastasis than that in IDC patients with lymph node metastasis, which indicates that E-cad is an important index for lymph node metastasis of IDC.
