Hedgehog信号通路与肿瘤的关系研究进展

Hedgehog（Hh）信号通路在胚胎时期的细胞分化、组织发育及器官形成中扮演重要角色。近年来,Hh信号通路与肿瘤的关系日益受到人们的重视。多项研究结果显示Hh信号通路在多种肿瘤组织与细胞系中异常激活,并与肿瘤的增殖分化、细胞凋亡、血管新生、侵袭转移等密切相关。阻断肿瘤细胞中Hh信号传导通路将为人类肿瘤的治疗提供一个新的有效手段。     

Hedgehog信号通路与肿瘤的关系研究进展

Hedgehog(Hh)信号通路在胚胎时期的细胞分化、组织发育及器官形成中扮演重要角色。近年来,Hh信号通路与肿瘤的关系日益受到人们的重视。多项研究结果显示Hh信号通路在多种肿瘤组织与细胞系中异常激活,并与肿瘤的增殖分化、细胞凋亡、血管新生、侵袭转移等密切相关。阻断肿瘤细胞中Hh信号传导通路将为人类肿瘤的治疗提供一个新的有效手段。     

Hedgehog信号转导通路与肺癌

Hedgehog(Hh)信号通路在胚胎发育期起关键作用,调节细胞的增殖、分化,协调组织器官如皮肤、脑、神经管、肠、附肢及肺等发育过程中的关键步骤.在成年期,Hh通路调控干细胞的增殖,此时Hh通路受到严格的时空限制.近年来研究表明Hh信号通路异常激活与包括肺癌在内的多种肿瘤的发生、发展密切相关,因此可能会成为肿瘤治疗的一个新靶点.现对Hh信号通路的特性及其在肺癌中的研究现状作一综述.     

Hedgehog信号转导通路与肺癌

 【摘要】　Hedgehog（Hh）信号通路在胚胎发育期起关键作用,调节细胞的增殖、分化,协调组织器官如皮肤、脑、神经管、肠、附肢及肺等发育过程中的关键步骤。在成年期,Hh通路调控干细胞的增殖,此时Hh通路受到严格的时空限制。近年来研究表明Hh信号通路异常激活与包括肺癌在内的多种肿瘤的发生、发展密切相关,因此可能会成为肿瘤治疗的一个新靶点。现对Hh信号通路的特性及其在肺癌中的研究现状作一综述。     

Hedgehog signaling pathway and ovarian cancer

Epithelial ovarian carcinoma (EOC) is the most common form of ovarian malignancies and the most lethal gynecologic malignancy in the United States. To date, in spite of treatment to it with the extensive surgical debulking and chemotherapy, the prognosis of EOC remains dismal. Recently, it has become increasingly clear that in many instances, the signaling and molecular players that control development are the same, and when inappropriately regulated, drive tumorigenesis and cancer development. Here, we discuss the possible involvement of Hedgehog (Hh) pathway in the cellular regulation and development of cancer in the ovaries. Using the in vitro and in vivo assays developed has facilitated the dissection of the mechanisms behind Hh-driven ovarian cancers formation and growth. Based on recent studies, we propose that the inhibition of Hh signaling may interfere with spheroid-like structures in ovarian cancers. The components of the Hh signaling may provide novel drug targets, which could be explored as crucial combinatorial strategies for the treatment of ovarian cancers.Key Words: Hedgehog signaling, ovarian cancer, targeted therapy     

Hedgehog信号转导通路与肺癌

Hedgehog(Hh)信号通路在胚胎发育期起关键作用,调节细胞的增殖、分化,协调组织器官如皮肤、脑、神经管、肠、附肢及肺等发育过程中的关键步骤.在成年期,Hh通路调控干细胞的增殖,此时Hh通路受到严格的时空限制.近年来研究表明Hh信号通路异常激活与包括肺癌在内的多种肿瘤的发生、发展密切相关,因此可能会成为肿瘤治疗的一个新靶点.现对Hh信号通路的特性及其在肺癌中的研究现状作一综述.     

Hedgehog信号通路与胃癌

Hedgehog (Hh)信号通路在胚胎发育、组织修复、癌症发生等进程中发挥重要作用.近年来多项研究发现Hh通路的异常激活与胃癌的发生、发展关系密切.本文就Hh信号通路的构成及其在胃中的表达、生理作用和胃癌发生、发展的关系等方面的研究进展作一综述.     

Hedgehog信号通路与乳腺癌干细胞

Hedgehog (HH) signaling pathway is a classic signaling pathway which controls embryonic development. Recent studies show that HH signaling pathway plays an important role in the tumorigenesis and development of cancer. Breast cancer stem cell (BCSC) is closely associated with malignant tumor metastasis, relapse and treatment resistance. HH pathway plays crucial roles in maintaining the characters of BCSC, and will probably become a novel therapeutic target of breast cancers.     

Hedgehog信号通路及其抑制物在抗肿瘤治疗中的研究进展

目的:Hedgehog信号通路不仅与胚胎的发育、组织的形成、成人组织再生及修复相关,同时已被证实与多种肿瘤细胞的形成、生长和转移具有相关性。当该信号通路异常激活时,会引起肿瘤的发生和发展。因此,对多种肿瘤中Hedgehog信号通路的了解,将有助于针对其特异性治疗药物的研发和应用。目前,第一个针对Hedgehog信号通路的小分子抑制剂GDC-0449已进入临床试验阶段,并显示了良好的临床疗效。本文就此途径与肿瘤的关系及在肿瘤治疗中的应用进行综述。     

Hedgehog signaling pathway is a possible therapeutic target for gastric cancer

BACKGROUND AND OBJECTIVES: It has been shown that the hedgehog (Hh) signaling pathway is activated in gastric cancer. To investigate the viability of the Hh pathway as a therapeutic target, we analyzed activation of the Hh pathway in gastric cancer. METHODS: Surgically resected gastric carcinoma specimens and lymph nodes were analyzed immunohistochemically. We used the percentage of cancer cells with nuclear translocation of Gli1 as a marker of Hh pathway activation. RESULTS: Nuclear localization of Gli1 was higher in 28 undifferentiated-type tumors than in 30 differentiated-type tumors. Eighteen of the fifty-eight cancer specimens consisted of a mixture of a histologically predominant part and a small area with different histology. In these 18 tumors, the percentage of cells showing nuclear staining of Gli1 was higher in the undifferentiated-type part than in the differentiated-type part. Nuclear staining of Gli1 in primary tumors was positively correlated with lymph node metastasis. The Gli1 nuclear staining percentage of metastatic lymph nodes correlated closely with that of each primary carcinoma. Cyclopamine, a Hh pathway inhibitor, suppressed the growth of gastric cancer cells in vitro. CONCLUSIONS: The Hh pathway may be a useful therapeutic target for such as undifferentiated-type gastric cancer with lymph node metastasis.     

Hedgehog信号通路与肿瘤的关系

 Hedgehog(Hh)信号通路在脊椎动物胚胎发育过程中起核心作用,参与调控多个基本生命过程,包括细胞增殖、分化和组织塑形。在正常成人该通路涉及干细胞维持、组织修复和再生等过程。目前越来越多的证据表明Hh信号通路与人类肿瘤的增殖、生存能力等有相关性。     

Hedgehog signaling pathway as a therapeutic target in breast cancer

The Hedgehog (Hh) signaling pathway, which is well conserved even in mammals and other vertebrate species, has long been known to direct growth and patterning during embryonic development. It has been shown that the Hh pathway also plays a critical role in mouse normal mammary gland development. Namely, it has been shown that disruption of the Hh pathway-related genes such as Patched-1 and Gli2 leads to ductal dysplasias that closely resemble some hyperplasia of human breast. In addition, it has been reported that breast carcinoma cells have disruption of these genes. These findings strongly indicate a contribution of the Hh pathway to development of human breast carcinoma. In fact, constitutive activation of the Hh pathway was found in most of 52 surgically resected breast carcinoma specimens. Interestingly, exposure to cyclopamine, a steroidal alkaroid that blocks the Hh pathway, suppressed the growth of the Hh pathway-activated breast carcinoma cells. Thus, the Hh pathway may function in progression of breast carcinoma. In this short review, possibilities of the Hh pathway as a new therapeutic target in breast carcinoma will be mainly discussed.     

Hedgehog signaling pathway is inactive in colorectal cancer cell lines

The Hedgehog (Hh) signaling pathway plays an important role in human development. Abnormal activation of this pathway has been observed in several types of human cancers, such as the upper gastro-intestinal tract cancers. However, activation of the Hh pathway in colorectal cancers is controversial. We analyzed the expression of the main key members of the Hh pathway in 7 colon cancer cell lines in order to discover whether the pathway is constitutively active in these cells. We estimated the expression of SHH, IHH, PTCH, SMO, GLI1, GLI2, GLI3, SUFU and HHIP genes by RT-PCR. Moreover, Hh ligand, Gli3 and Sufu protein levels were quantified by western blotting. None of the cell lines expressed the complete set of Hh pathway members. The ligands were absent from Colo320 and HCT116 cells, Smo from Colo205, HT29 and WiDr. GLI1 gene was not expressed in SW480 cells nor were GLI2/GLI3 in Colo205 or Caco-2 cells. Furthermore the repressive form of Gli3, characteristic of an inactive pathway, was detected in SW480 and Colo320 cells. Finally treatment of colon cancer cells with cyclopamine, a specific inhibitor of the Hh pathway, did not downregulate PTCH and GLI1 genes expression in the colorectal cells, whereas it did so in PANC1 control cells. Taken together, these results indicate that the aberrant activation of the Hh signaling pathway is not common in colorectal cancer cell lines.     

Hedgehog signaling pathway is a new therapeutic target for patients with breast cancer

The Hedgehog (Hh) signaling pathway functions as an organizer in embryonic development. Genetic analysis has demonstrated a critical role for the Hh pathway in mammary gland morphogenesis. Disruption of Patched1, a component of the Hh pathway, results in abnormal growth of mammary duct. Recent studies have shown constitutive activation of the Hh pathway in various types of malignancies. However, it remains unclear whether this pathway is activated in human breast cancer. Here, we determined the expression of the components, including Sonic Hh, Patched1, and Gli1, of the Hh pathway by immunohistochemical staining in a series of 52 human breast carcinomas. All of 52 tumors display staining of high intensity for Gli1 when compared with adjacent normal tissue. The nuclear staining ratio of Gli1 correlates with expression of estrogen receptor and histologic type. Exposure to cyclopamine, a steroidal alkaloid that blocks the Hh pathway, suppresses expression of Gli1 and the growth of the Hh pathway-activated breast carcinoma cells. These data indicate that the Hh pathway is a new candidate for therapeutic target of breast cancer.     

Hedgehog信号途径与肿瘤

Hedgehog信号途径在哺乳动物的形态发生及胚胎形成中扮演重要的角色。在哺乳动物中至少发现三种同源基因:Sonic HH(SHH)、IndianHH(IHH)和Desert HH(DHH),均参与胚胎发育、器官成熟及肿瘤形成。我们就Hedgehog信号分子的结构、信号分子从膜外转移到核内以及如何发挥信号作用作详尽阐述。详细介绍参与HH信号途径的相关蛋白分子:跨膜蛋白受体Patched(PTCH)、跨膜蛋白Smoothened(SMOH)、转录因子GLI、胞质蛋白Fused和Fused抑制蛋白[Su(Fu)]。但HH信号途径的紊乱及其信号相关成分的突变会导致肿瘤的发生与发展,如基底细胞癌、肺癌、前列腺癌、口腔癌和消化道肿瘤等。探讨HH信号在肿瘤中的表达谱以及针对HH信号途径相关成分开发的特异性药物,有助于肿瘤的治疗。加强对HH信号途径的详尽了解,有助于更好地调控HH信号,深入了解细胞增殖与组织肿瘤之间的关系。     

Hedgehog signaling pathway as a therapeutic target in various types of cancer

Hedgehog (Hh) signaling is an important factor in growth and patterning during embryonic development. A mutation in Patched, Smoothened or Gli1, which regulate the Hh signaling pathway, might lead to the onset of glioblastoma, basal cell carcinoma, medulloblastoma and rhabdomyosarcoma. Recently, Hh signaling has been reported to be activated in a ligand-dependent manner, contributing to carcinogenesis and cancer progression. Hedgehog signaling is reactivated in various types of cancer, and this contributes to cancer progression by facilitating proliferation, invasion and cell survival. Moreover, Hh signaling is associated with several other signaling pathways that contribute to cancer progression. These observations indicate that controlling Hh signaling might become a target for novel molecular targeting therapy.