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本帖最后由 pujixing 于 2014-9-22 15:54 编辑
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* d5 I* ]; {- v, O3 |' k8 r6 Y说的很有道理,免疫系统和肿瘤的关系的确和道与魔的关系有某种类似。然而万事万物的关系不是一成不变的,随着事物间相互的演化的发展,友可以成敌,敌也可化友。关于肿瘤在发展中受到免疫系统的促进(如果说‘帮助’不太专业的话,呵呵)并不是在下信口说的,过去十几年有很多文章在讨论‘免疫编辑’(cancer immuno-editing)的问题,这里仅举一例:
; z5 L* H8 m9 gScience2011
5 W. v8 u: c+ K" z9 _REVIEW
' H9 M( m& o( R& F' hCancer Immunoediting: Integrating
7 [- ? C' w6 F3 e) sImmunity’s Roles in Cancer
* G" j4 O9 `6 w+ \) `Suppression and Promotion+ W) P" r9 H/ |8 X5 i
Robert D. Schreiber,1* Lloyd J. Old,2 Mark J. Smyth3,4
) ^& G+ y2 j1 f. ]3 yUnderstanding how the immune system affects cancer development and progression has been# Z+ r- }5 G+ _" k: S6 a4 r6 A
one of the most challenging questions in immunology. Research over the past two decades has+ r& W1 l, R& b) m% Y" e( I' ~* C1 O) Q
helped explain why the answer to this question has evaded us for so long. We now appreciate
I4 }1 P8 p' ^1 Ithat the immune system plays a dual role in cancer: It can not only suppress tumor growth by5 H P4 B ?. z0 m' b$ T
destroying cancer cells or inhibiting their outgrowth but also promote tumor progression( h' e( ~& I7 c. q
either by selecting for tumor cells that are more fit to survive in an immunocompetent host or
: r: Q9 ?, v8 a4 o( Q$ U+ mby establishing conditions within the tumor microenvironment that facilitate tumor outgrowth.# W/ g6 k1 e9 Z9 z& S4 I# Z
Here, we discuss a unifying conceptual framework called “cancer immunoediting,” which0 e" Y, _' N- o5 ]& S9 u! u
integrates the immune system’s dual host-protective and tumor-promoting roles.
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/ @4 J" m9 i0 K8 B; S/ V# K免疫系统实质上是一把双刃剑。其保护机体的机制实际上主要是通过对'异体'的排斥和清除来实现的。而免疫系统对异体和自体的识别是通过education来实现的,也不是一成不变的。癌症细胞的狡猾就在于可以巧妙地进化发展(当然可能通过一系列的自然选择过程)出能够逃避免疫系统清除(逃逸),并利用免疫系统的细胞类群(合谋)。这是侯免疫系统不仅不会对这些癌细胞进行排斥,反而会提供增值和转移方面的促进。 |
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