趋化因子及其受体与肿瘤

趋化因子及其受体在肿瘤的发生、生长和转移等各个阶段都有复杂的网络性表达,研究表明趋化因子CXCL12及受体CXCR4介导乳腺癌、结肠癌、膀胱癌和前列腺癌等肿瘤的转移和发展,这为深入探讨肿瘤的发病及转移机制提供了新视角。现对近年来有关趋化因子及其受体与肿瘤之间的研究进展作一综述。     

趋化因子及其受体与肿瘤

在最近的五年中 ,生物信息学和ＥＳＴ数据库的发展使得许多新型趋化因子 (ｃｈｅｍｏｋｉｎｅ)及其受体基因不断地被发现 ,人们对于多种趋化因子及其受体的生物学活性和作用机理有了更深入的研究 ,对趋化因子超家族的结构与功能有了更全面的了解 ,例如趋化因子受体被发现是ＨＩＶ感染的共同受体、趋化因子及其受体在炎症反应、树突状细胞成熟、Ｔ ,Ｂ细胞发育、Ｔｈ1和Ｔｈ2应答、感染、血管形成、肿瘤中都起着非常重要的作用。目前转基因和基因敲除小鼠的不断应用有助于研究趋化因子的体内作用。本文主要介绍近年来关于趋化因子及其受体在…     

趋化因子受体与肿瘤转移

目前认为肿瘤细胞转移和淋巴细胞迁移具有相似机制,但趋化因子及其受体参与肿瘤转移的机制尚未完全阐明。由于其在肿瘤细胞器官选择性转移中的重要作用,趋化因子受体有希望成为肿瘤治疗的靶标并具有预后价值。现综述趋化因子受体与肿瘤侵袭和转移的研究进展。     

趋化因子受体与肿瘤转移

目前认为肿瘤细胞转移和淋巴细胞迁移具有相似机制,但趋化因子及其受体参与肿瘤转移的机制尚未完全阐明。由于其在肿瘤细胞器官选择性转移中的重要作用,趋化因子受体有希望成为肿瘤治疗的靶标并具有预后价值。现综述趋化因子受体与肿瘤侵袭和转移的研究进展。     

趋化因子及其受体在肿瘤侵袭转移中的作用

近年来陆续发现了许多新的趋化因子和受体，研究发现趋化因子及其受体参与机体的多种生理和病理过程，并在肿瘤的侵袭转移中通过不同机制发挥着重要作用。本文对其进行简要综述。     

趋化因子CCL18与肿瘤

趋化因子CCL18通过招募炎症细胞参与机体的免疫和炎症过程,发挥免疫调控作用.在肿瘤患者血清及某些肿瘤组织中CCL18蛋白表达明显增加.然而CCL18在肿瘤中是发挥促癌作用还是抑癌作用尚存在争议.研究CCL18的作用及作用机制能够为肿瘤诊治提供新的靶向目标.     

趋化因子受体4与肿瘤

趋化因子受体4（CXCR4）属于G蛋白耦联受体超家族,具有趋化免疫细胞、维持免疫细胞的动态平衡等生物学作用。CXCR4表达于多种类型的组织和细胞,在多种肿瘤及肿瘤的不同阶段,CXCR4的表达都明显高于正常组织。CXCR4与肿瘤细胞的增殖、黏附、侵袭和转移有关,在肿瘤的进展中发挥重要作用。     

趋化因子受体4与肿瘤

趋化因子受体4（CXCR4）属于G蛋白耦联受体超家族,具有趋化免疫细胞、维持免疫细胞的动态平衡等生物学作用。CXCR4表达于多种类型的组织和细胞,在多种肿瘤及肿瘤的不同阶段,CXCR4的表达都明显高于正常组织。CXCR4与肿瘤细胞的增殖、黏附、侵袭和转移有关,在肿瘤的进展中发挥重要作用。     

趋化因子与肿瘤

本文就趋化因子及其受体家族在肿瘤生长和转移中的作用以及肿瘤生物治疗中的应用等方面的进展作一综述。     

趋化因子与肿瘤侵袭转移

趋化因子是一类具有趋化作用的分泌型小分子蛋白质,其受体属于G蛋白偶联的7次跨膜受体超家族.越来越多的证据表明趋化因子与肿瘤生长、侵袭和转移密切相关.现综述趋化因子在肿瘤细胞增殖、迁移、粘附、降解细胞外基质、肿瘤血管生成及肿瘤器官特异性转移等过程中的作用.     

Chemokines and cancer

The chemokines and their receptors are a superfamily of small secreted molecules that control the migration of many cell types in the body. Several years ago it became clear that some chemokines and receptors regulate the migration of certain cells in the lymphoid system, and this raised the possibility that chemokines could also control the migration of tumor cells in the body. Breast cancer cells were found to express chemokine receptors in a nonrandom manner, and these observations pointed to several chemokine/receptor pairs that control tumor-cell migration. The most important ligand/receptors pairs in these phenomena include CXCL12/CXCR4 and CCL21/CCR7. Since then, there has been intense interest in this area and many studies have been published, especially on CXCR4. These studies point to the following conclusions: (i) Tumors express chemokine receptors in a nonrandom manner. (ii) CXCR4 is the most widely expressed chemokine receptor in many different cancers. (iii) CCR7 is also expressed by many cancers, and is likely to mediate metastasis to the lymph nodes in selected cancers. (iv) The effects of CXCL12 on CXCR4-bearing tumor cells likely include many other functions (growth, differentiation) besides migration. During normal development, the interaction CXCL12/CXCR4 is known to be involved in organogenesis. This process shares many characteristics with metastasis, and represents one of the key areas of future research.     

趋化因子与肺癌

趋化因子是一类趋化细胞定向移动的小分子蛋白,在肺癌中,趋化因子参与调节肿瘤细胞的生长、肿瘤内血管生成、抗肿瘤免疫及诱导远处转移的过程.趋化因子参与了肺癌进展,为肺癌的治疗提供了新的靶点.     

Chemokines in neuroectodermal development and their potential implication in cancer stem cell-driven metastasis

Chemokines regulate proliferation and migration of various types of normal stem and progenitor cells, including precursor cells of neuroectodermal origin. Based on this it is conceivable that the established role of chemokines in cancer cell proliferation and organ-specific metastasis might also be associated with stem cell-like cells present in the tumor. Such cancer stem cells (CSCs) represent a small subpopulation of tumor cells that are thought to initiate and sustain tumor formation. More recently, characteristics of stem cells have also been observed in metastatic cancer cells, and it has been suggested that CSCs might play a crucial role in the metastatic process as such. Intriguingly, first evidence has been provided that the metastatic spread of specific CSCs is driven by chemokine signaling. Thus it is possible that chemokine-mediated CSC regulation might be a general feature of metastasis formation.     

趋化因子与肺癌

趋化因子是一类趋化细胞定向移动的小分子蛋白,在肺癌中,趋化因子参与调节肿瘤细胞的生长、肿瘤内血管生成、抗肿瘤免疫及诱导远处转移的过程。趋化因子参与了肺癌进展,为肺癌的治疗提供了新的靶点。     

趋化因子与肺癌

趋化因子与其相应的受体作用,广泛参与生物活动及病理过程。研究发现多种肿瘤细胞都过表达功能性的趋化因子。在肺癌中,趋化因子参与了其增殖、凋亡、侵袭和转移等过程。肺癌过表达的趋化因子及其受体,可作为明确的靶向目标进行针对性的抗肿瘤治疗。     

Semaphorins and their receptors in lung cancer

Semaphorins are a large family of secreted, transmembrane and GPI-linked proteins initially characterized in the development of the nervous system and axonal guidance. Semaphorins are expressed in many tissues where they regulate normal development, organ morphogenesis, immunity and angiogenesis. They affect the cytoskeleton, actin filament organization, microtubules and cell adhesion. Semaphorin signaling is transduced by plexins, which in the case of most class-3 semaphorins requires high-affinity neuropilin receptors. The neuropilins also function as receptors for VEGF and other growth factors, and their expression is often abnormal in tumors. In cancer, semaphorins have both tumor suppressor and tumor promoting functions. We review here the current status of semaphorins and their receptors in tumor development with a focus on lung cancer.     

趋化因子及其受体与乳腺癌相关性的研究现状

目的：探讨趋化因子及其受体在乳腺癌发展过程中所起的作用,以及在此过程中其他细胞因子对趋化因子及受体的影响。方法：以乳腺肿瘤、趋化因子和受体为关键词检索CHKD系列全文数据库和MEDLINE数据库,筛选2002～2007年相关文献,重点是有关研究较多的CXCR4、CCR7及其配体,VEGF和MMP等的调控机制,以及趋化因子及受体与临床病理学参数的关系。结果：在乳腺癌的发展过程中,其他细胞因子及基因突变导致的自身结构的变化都会影响趋化因子及其受体的表达。趋化因子和受体结合,作用于改变肿瘤生物学特性的蛋白,进而调控乳腺癌细胞的发展。通过抗体抑制这些趋化因子及其受体的作用,就可以抑制乳腺癌的发生及转移,提示趋化因子及其受体有望成为乳腺癌靶向治疗的新途径。结论：趋化因子及其受体在乳腺癌组织或细胞上高表达,对乳腺癌的生长、侵袭及转移有重要作用,其信号的活化受到多种因素的影响。