射了！

[602674]

愛肝達人站／免疫細胞會攻擊自己的肝細胞

【聯合晚報╱許金川（台大醫學院內科教授/財團法人肝病防治學術基金會執行長）】 2010.06.06 01:54 pm


某醫師愛用手機簡訊，好友老張問藥物劑量如何吃。

「一次半噸！」老張看了簡訊丈二金剛摸不著頭緒，過了不久，又收到一封。

「一次半顆！」原來是手機手寫辨識錯誤。

老張也不甘示弱，回了一通。

「射了！」

醫師看了大吃一驚，「難道老張是同性戀！」

原來也是手寫辨識之誤，是「謝了」不是「射了」，並不是故意的。手機只認到右邊的「射」字，把左邊的「言」給忽略了。

辨別不同的人與物是生物的本能，即使高等動物如人類有時也會認錯人，例如認賊作父，誤殺無辜也是明顯的例子。

在人體內辨識自己或別人的器官或外來物，就是靠著免疫系統，免疫細胞會將外來的細菌、病原菌加以圍攻，利用吞噬作用或抗體反應加以消滅，但有時也會出錯。在醫學上，自體免疫系統疾病就是一個例子，例如風濕性關節炎、紅斑性狼瘡都是自己的免疫系統認錯了，攻擊自己組織的例子。

肝臟也有類似的情形，例如自體免疫性肝炎，就是自己的免疫細胞攻擊自己肝細胞，進而引起肝炎、肝纖維化甚至肝硬化，這種病例在西方人、女性較多，在國內，肝細胞會發炎壞死，主要還是B型或C型肝炎病毒引起。

此外，免疫細胞也會攻擊自己的肝內膽管或肝外膽管，引起膽管發炎壞死，膽汁排泄受影響，病人出現皮膚癢、肝指數及膽紅素升高，慢慢也會出現黃疸，最後引起肝硬化甚至肝昏迷，此時只能靠肝臟移植解決問題了。

外來的器官植入自己體內，人體的自然防衛機轉辨識出來是外來物，會將它加以破壞，因此，要用藥物抑制免疫排斥反應，讓人體與外來物和平共存。

總而言之，「水能載舟亦能覆舟」，免疫系統之於人體，尤其藥與毒是一體兩面，唯有醫學更進步，醫師才能掌握排斥與免疫於股掌之間，為病友造福。

【2010/06/06 聯合晚報】@

[shuhuez5460]

被騙進來

我也射了

[好大]

(無言)

[cyc]

射射分享

[antonio]

射你千遍也不厭倦

[Sidney]

許P的風格...
只要聽過許P演講
民眾都會樂不可支

[gary]

偶像

[602674]

果然有好<射>之徒!

[polo]

大恩不言射了

[y79127912]

真的是射的好阿

[xkuk]

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