首页> 外文期刊>Pathology oncology research: POR >Hypoxia generates a more invasive phenotype of tumour cells: an in vivo experimental setup based on the chorioallantoic membrane.
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Hypoxia generates a more invasive phenotype of tumour cells: an in vivo experimental setup based on the chorioallantoic membrane.

机译:缺氧产生肿瘤细胞更具侵入性的表型:一种基于绒毛膜尿囊膜的体内实验装置。

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摘要

Of all processes involved in carcinogenesis, local invasion and the formation of metastases are the clinically most relevant but the scientifically least well understood at their molecular level. Recent experimental progress has identified that tumour hypoxia not only induces tumour angiogenesis, but also modulates the expression of several genes that have been implicated in tumour invasion and metastasis. Here we developed an in vivo model to understand a number of molecular pathways and cellular mechanisms for tumour invasion in hypoxia. For this purpose fertilized chicken eggs were incubated for 10 days in normoxic conditions. Subsequently colon carcinoma cells (SW-480) were placed on the chorioallantoic membrane. During the following 6 days the eggs were incubated either in normoxic conditions or in stepwise decreasing hypoxic conditions. SW-480 colon carcinoma cells did not invade the epithelial layer in normoxic conditions. In contrast an invasion through the epithelial layer in to the mesoderm was already seen after 3 days when incubated in hypoxic conditions. The chorioallantoic membrane assay described in this paper allows investigating tumour invasion and its cellular mechanisms under defined hypoxic conditions.
机译:在所有与癌变有关的过程中,局部侵袭和转移灶的形成在临床上最相关,但在分子水平上却在科学上了解得最少。最近的实验进展已经确定,肿瘤缺氧不仅诱导肿瘤血管生成,而且还调节与肿瘤侵袭和转移有关的几种基因的表达。在这里,我们开发了一种体内模型,以了解低氧条件下肿瘤侵袭的许多分子途径和细胞机制。为此目的,将受精的鸡蛋在常氧条件下孵育10天。随后将结肠癌细胞(SW-480)放置在绒膜尿囊膜上。在接下来的6天中,将卵在常氧条件下或逐步降低的低氧条件下进行孵育。在常氧条件下,SW-480结肠癌细胞不会侵袭上皮层。相反,在低氧条件下温育3天后,已经观察到通过上皮层侵入中胚层。本文所述的绒膜尿囊膜测定法可用于研究在缺氧条件下的肿瘤侵袭及其细胞机制。

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