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Newsletter.pptx
1.
Newsletter Tina
2.
土拉黴素的免疫調節特性於感染豬生殖與呼吸綜合症的豬單核球衍 生巨噬細胞 • 土拉黴素(Tulathromycin)已被發現在牛和豬動物體中具有抗發炎及免疫調 節特性 • 實驗目的: 觀察土拉黴素於PRRS感染的單核球衍生巨噬細胞的抗病毒及免疫調節特性 •
總結: 1. 土拉黴素可預防單核球衍生巨噬細胞因PRRS感染造成的型態改變 2. 土拉黴素可抑制PRRS病毒誘導單核球衍生巨噬細胞CXCL-8的分泌 3. 土拉黴素可抑制PRRS病毒誘導單核球衍生巨噬細胞內粒線體ROS的生成 4. 土拉黴素可抑制PRRS病毒引起的單核球衍生巨噬細胞壞死 5. 土拉黴素可恢復PRRS感染的單核球衍生巨噬細胞的非調理吞噬作用
3.
土拉黴素可預防單核球衍生巨噬細胞因PRRS感染造成的型態改變 • 由上圖可知,經過PRRSV感染的單核球衍生巨噬細 胞型態變為纖維細胞樣且有偽足,然而經過土拉 黴素前處理再感染PRRSV的巨噬細胞形態正常。 • 經過土拉黴素前處理,可顯著抑制因PRRS感染後 誘導的型態改變。 Control:
使用HBSS緩衝溶液處理,為控制組。 Virus:感染PRRSV 0.1 m.o.i. 12hr TUL: 僅使用0.5 mg/ml土拉黴素進行處理 1 hr TUL+Virus: 先用0.5 mg/ml土拉黴素前處理後再感染PRRSV 0.1 m.o.i. 12hr
4.
土拉黴素可抑制PRRS病毒誘導單核球衍生巨噬細胞CXCL-8的分 泌 Control: 使用HBSS緩衝溶液處理,為控制組。 Virus:感染PRRSV 0.1
m.o.i. 24hr TUL: 僅使用0.5 mg/ml土拉黴素進行處理 1 hr TUL+Virus: 先用0.5 mg/ml土拉黴素前處理後再感染PRRSV 0.1 m.o.i. 24hr LPS: 使用 1 microg/ml脂多醣處理,為陽性對照組。 CXCL-8:又稱白三烯B4,為巨噬細胞及其他細 胞分泌的嗜中性球趨化物,一種前發炎細胞 激素,最終會造成嚴重的肺臟組織損傷及死 亡。 • PRRS感染後24小時,會引起6倍以上的CXCL-8分泌 • 經過土拉黴素前處理,可顯著抑制因PRRS感染後 巨噬細胞CXCL-8的分泌。
5.
土拉黴素可抑制PRRS病毒誘導單核球衍生巨噬細胞內粒線體ROS 的生成 Control: 使用HBSS緩衝溶液處理,為控制組。 Virus:感染PRRSV 0.1
m.o.i. 24hr TUL: 僅使用0.5 mg/ml土拉黴素進行處理 1 hr TUL+Virus: 先用0.5 mg/ml土拉黴素前處理後再感染PRRSV 0.1 m.o.i. 24hr LPS :使用 1 microg/ml脂多醣(LPS)培養巨噬細胞 1 hr 粒線體ROS:可做為評估發炎組織中病理性氧 化損傷的標誌 • PRRS感染可顯著的增加細胞內ROS的生成, 而經過土拉黴素前處理的巨噬細胞可顯 著降低ROS的產生。
6.
土拉黴素可抑制PRRS病毒引起的早期單核球衍生巨噬細胞壞死 Control: 使用HBSS緩衝溶液處理,為控制組。 Virus:感染PRRSV 0.5
m.o.i. 2hr 、 12hr 、 24hr TUL: 僅使用1 mg/ml土拉黴素進行處理 1 hr TUL+Virus: 先用1 mg/ml土拉黴素前處理後再感染PRRSV 0.5 m.o.i. 2hr、12hr、24hr Triton-X :用其誘導巨噬細胞的壞死,作為陽性對照組。 • 使用乳酸脫氫酶測定巨噬細胞的壞死 • PRRS感染後12及24小時顯著的增加乳酸 脫氫酶含量。使用土拉黴素前處理的組 別在PRRS感染後12小時可顯著地降低巨 噬細胞的壞死。
7.
土拉黴素可恢復PRRS感染的單核球衍生巨噬細胞的非調理吞噬作 用 • PRRS感染後顯著減少具吞噬作用的巨噬細胞數量(吞噬1個螢光標記的酵母聚醣顆粒) • PRRS感染後顯著減少具高吞噬指數的巨噬細胞數量(至少吞噬5個螢光標記的酵母聚醣顆粒) •
土拉黴素前處理後,顯著降低因PRRS感染引發抑制巨噬細胞的吞噬作用 Control: 使用HBSS緩衝溶液處理,為控制組。 Virus:感染PRRSV 0.5 m.o.i. 12hr TUL: 僅使用1 mg/ml土拉黴素進行處理 1 hr TUL+Virus: 先用1 mg/ml土拉黴素前處理後再感染PRRSV 0.5 m.o.i. 12hr
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