The Fallacy of Epithelial Mesenchymal Transition in Neoplasia + v8 O# c- R# tDavid Tarin( p- S; d0 ]) k5 Y2 A) D9 K
Rebecca and John Moores Cancer Center and Department of Pathology, University of California, San Diego, San Diego, California . m2 _& ]! l% k9 |% H% r+ w3 `9 J. z2 n" r; F+ n+ p2 P Abstract3 K+ }+ W& ]+ c" k
Epithelial mesenchymal transition has been postulated as a versatile mechanism which facilitates cellular repositioning and redeployment during embryonic development, tissue reconstruction after injury, carcinogenesis, and tumor metas- tasis. The hypothesis originates from parallels drawn between the morphology and behavior of locomotory and sedentary cells in vitro and in various normal and pathologic processes in vivo. This review analyzes data from several studies on embryonic development, wound healing, and the pathology of human tumors, including work from our own laboratory, to assess the validity of the proposal. It is concluded that there is no convincing evidence for conversion of epithelial cells into mesenchymal cell lineages in vivo and that the biological repertoire of normal and malignant cells is sufficient to account for the events and processes observed, without needing to invoke radical changes in cell identity. (Cancer Res 2005; 65(14): 5996-6001) ; V k8 S& V0 c难怪EMT在肿瘤中作用的原始文献这么难找 原来是想象出来的7 i+ B3 x# h; f8 ?
[attach]10364[/attach]作者: marrowstem 时间: 2010-7-11 11:31
个人表示同意。在美国,病理医生一直对EMT嗤之以鼻,认为是一种假象。7 n G! z0 i4 L/ p
EMT有可能是Robert Weinberg杜撰出来的baby,开个玩笑。作者: flydayzhu 时间: 2010-7-11 12:12
9 i6 ^1 |9 b& F1 K" i$ c w3 E + D& y( x( g& p# N5 E. I% n支持daviddow 的对待科学问题的态度,君子和而不同! ; Y/ q) z& e$ I* {/ i5 i9 i8 ?科学探索无禁区,论坛中更不应该打棒子、戴帽子或搞文字狱。作者: daviddow 时间: 2011-1-16 09:57
回复 sunsong7 的帖子 . |. t# a. g }, B0 g' q: U2 A- n) J! b y, D$ M% @' _& g
谢谢sunsong7 这位高级会员的支持。其实如果大家都对一个问题持不同的态度,而且是一个很大的矛盾,那么这个可能就是一个很大的科学问题。1900左右就开始病毒导致癌症还是化学导致癌症,纷争了几十年,到了1960年代末期,毕晓普发现了癌基因,才有了正确答案。所以,纷争和怀疑没关系,说不定能推动科学的巨大进步作者: l19rna 时间: 2011-4-4 17:00
本帖最后由 l19rna 于 2011-4-4 17:01 编辑 1 D* |: @. @& p' ^ B, H
- [& a; ?5 D- a如果EMT是幻象,那么ips的MET也是幻像?注意,EMT也就是一假说,假说就是需要验证的。 - K. K+ T4 n7 [$ y5 e直到现在,也还有人说DNA不是双螺旋呢,你认为怎么样哦; o+ g4 `, X7 p. ~! p' q$ a
要发生EMT,首先就要求出现形态学变化,比如癌细胞侵袭时出现的伪足,你的正常上皮细胞一般也不出现伪足吧8 e7 C2 P$ X5 S, D* h7 R3 t, Q
那么IPS的形态学转换也是幻象吗?6 d: x N9 Y/ y7 L: L0 b1 y8 f
EMT自身的机理就没有研究清楚,大牛提出来的假说当然也不一定对,但是他提出来,让我们验证。科学不就是要我们追求事实真相吗?否则那不是科学。- f, w: M( v9 L+ |$ v# ?/ I
难说谁对谁错啊,我们一定要辩证性的看问题。作者: zzc2211 时间: 2011-4-15 23:27
回复 mckf111 的帖子% h$ H% d C+ ]. y
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支持你的质疑。有两点很关键。请注意EMT的逻辑。其立足点是,人类大部分(90%)恶性肿瘤是起源于上皮的癌。所以,癌必然先在上皮内形成,也就是原位癌。原位癌要发展成为浸润癌,必然经过EMT方能浸润到间质。 & H* h4 Q" ~4 j/ k0 w9 K% p1 [0 q9 L, W7 C7 i
问题的关键是,从原位癌到浸润癌的过程,谁证明了?有何证据?迄今为止,仍是太阳东出西落必然是围着地球转的逻辑。3 ?8 P8 B7 x- e: b+ f g" ^7 f
$ z" M) g9 `# I; _1 V如原位癌到浸润癌的逻辑不成立,EMT还能否成立?作者: Ryan 时间: 2012-11-1 07:43
我对《The hallmarks of cancer》这篇文章的题目嗤之以鼻。作者: Ryan 时间: 2012-11-1 07:45
What are the hallmarks of cancer? . ]9 J5 S2 e& N: l% W8 q' J5 l$ D7 o; S' Y B) P$ e" ]
Yuri Lazebnik1 X3 k; N a2 K; V! H
. m* U9 D3 T5 }& wAbstract 1 K' y4 v3 U, D. r8 d \+ _6 o* w& kA major goal of cancer research is to understand how to counteract mechanisms that underlie the ability of cancers to kill the patient or, in other words, to be malignant. To this end, the puzzling complexity of numerous and interrelated properties of cancers was distilled 10 years ago into “six essential alterations in cell physiology that collectively dictate malignant growth: self-sufficiency in growth signals, insensitivity to growth-inhibitory (antigrowth) signals, evasion of programmed cell death (apoptosis), limitless replicative potential, sustained angiogenesis, and tissue invasion and metastasis” (Douglas Hanahan and Robert Weinberg)1.作者: 饶冠华 时间: 2012-11-1 12:08