何旭容
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出版年: |
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研究生: |
何旭容 |
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研究生(英文姓名): |
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論文名稱: |
登革二型病毒感染對單核球細胞與T細胞所造成的不同反應 |
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英文論文名稱: |
Differential responses of T cells and monocytes upon dengue-2 virus infection |
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指導教授: |
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指導教授(英文姓名): |
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學位類別: |
碩士 |
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校院名稱: |
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系所名稱: |
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學號: |
S46851021 |
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學年度: |
86 |
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語文別: |
中文 |
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論文頁數: |
70 |
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關鍵詞: |
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英文關鍵詞: |
Dengue virus ; monocyte ; T cell ; apoptosis ; |
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被引用次數: |
0 |
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[ 摘要 ] |
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登革病毒是RNA病毒的一種,它被歸類到黃病毒科,黃病毒屬中,共有四種血清型。人感染登革病毒可能會發展成如登革出血熱或登革休克症等的致命性併發症。本論文利用兩種免疫細胞:T細胞與單核球細胞研究登革二型病毒感染以後不同免疫細胞所表現出的各種差異。分析的重點為細胞的成長、死亡。我們使用一組登革二型病毒特異性的核酸序列為引子於聚合酵素連鎖反應中證實病毒可以在所有研究的細胞中複製,並且用隙縫點墨法來定量病毒RNA的在細胞內的量,以及免疫螢光染色觀察病毒蛋白的表現。我們發現,登革病毒感染吸附單核球及T細胞株的能力類似,但是在單核球內的複製能力較T細胞差。受登革二型病毒感染後,Molt-4和Jurkat兩株T細胞株的生長受壓制;反之在單核球細胞株中,U-937細胞株的生長速率加快,而HL-60細胞株的生長則不受病毒感染所影響。另一方面,以death-ELISA and Merocyanine 540 binding assay來分析細胞的計畫性死亡,結果顯示Molt-4和Jurkat兩株T細胞株在受登革二型病毒感染後48小時,細胞計畫性死亡速度增加,然而在U-937 和HL-60兩株單細胞株卻不受影響。在死亡相關基因表現的研究上,發現Bcl-2的 mRNA量並不因病毒感染而有太大改變。但是T細胞內Fas-L及Fas的mRNA則受病毒感染而有增加。綜合以上結果,雖然這些細胞皆可受登革二型病毒感染,但是不同類的細胞反應則各有不同。 |
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[ 英文摘要 ] |
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Infection with dengue virus, an RNA virus classified to flaviviridae, may develop life-threatening complications such as dengue hemorrhagic fever and dengue shock syndrome. A variety of human mononuclear cell lines can be infected with dengue virus in vitro. In this study we compared the responses of T cells and monocytes after dengue-2 virus infection to determine their possible roles in the pathogenesis. Cell growth and death were analyzed. Reverse transcription-polymerase chain reaction analysis using primers specific to dengue viral RNA confirmed the replication of dengue-2 virus in cells. Viral RNA and viral E protein was analyzed by Slot blotting and immunostaining, respectively. We found that lesser viral RNA and viral protein were detected in monocytes than that in T cells. Futhermore, dengue-2 virus infection suppressed the growth of Molt-4 and Jurkat cells, while enhanced it of U-937 cells. The growth of HL-60 cells was not affected by dengue-2 virus infection. An increase in apoptosis, determined by death-ELISA and Merocyanine 540 binding assay, in Molt-4 and Jurkat cells was observed after 48-hr virus infection. Dengue virus did not enhance apoptosis in HL-60 and U-937 cells. Moreover, we found that there was more fas-L and fas mRNA, but not bcl-2, in virus infected cells. In conclusion, different cells might have distinct responses to dengue-2 virus infection. |
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