來自中山大學(xué),、南華大學(xué)、新加坡國(guó)立癌癥中心,、新加坡中央醫(yī)院、美國(guó)文·安德爾研究所(Van Andel Research Institute,,VARI )以及美國(guó)賓州Wistar研究院的研究人員展開協(xié)作,,在新研究中發(fā)現(xiàn)了一個(gè)可用于預(yù)測(cè)鼻咽癌(NPC)轉(zhuǎn)移擴(kuò)散的關(guān)鍵蛋白serglycin,這一研究發(fā)現(xiàn)將推動(dòng)科學(xué)家們開發(fā)出抑制鼻咽癌轉(zhuǎn)移擴(kuò)散的新治療策略,。相關(guān)研究論文在線發(fā)表在近期的《癌癥研究》(cancer research)雜志上,。
領(lǐng)導(dǎo)這一研究的是中山大學(xué)癌癥中心的錢朝南教授,其早年畢業(yè)于中山醫(yī)科大學(xué),,后曾在美國(guó)德州大學(xué)M.D.安德森癌癥中心及美國(guó)文安德爾研究所接受博士后培訓(xùn),。2004年開始在美國(guó)文安德爾研究所擔(dān)任研究專員,2006年受聘于新加坡國(guó)立癌癥中心兼職資深研究員,。2007年作為中山大學(xué)百人計(jì)劃引進(jìn)人才在中山大學(xué)腫瘤防治中心鼻咽科擔(dān)任研究員,、博士生導(dǎo)師。2008年被中國(guó)衛(wèi)生部聘為“健康中國(guó)2020”戰(zhàn)略研究專家,。2008年開始擔(dān)任中山大學(xué)腫瘤防治中心院長(zhǎng)助理,,2009年底開始擔(dān)任《癌癥》雜志副主編。其主要研究領(lǐng)域包括鼻咽癌遠(yuǎn)處轉(zhuǎn)移的分子機(jī)制和臨床診斷,、實(shí)體瘤血管生成與淋巴管生成的機(jī)制研究,、惡性腫瘤的動(dòng)物模型研究,。擅長(zhǎng)鼻咽癌早期診斷及綜合治療。目前已在SCI收錄的期刊發(fā)表論文34篇,。
鼻咽癌是一種發(fā)生于鼻咽粘膜的惡性腫瘤,,中國(guó)的南方及東南亞地區(qū)為鼻咽癌的多發(fā)區(qū)。其惡性程度較高,,且具有極高的癌細(xì)胞轉(zhuǎn)移率,。一般鼻咽癌患者確診時(shí)癌細(xì)胞常常已擴(kuò)散至頸部淋巴結(jié)甚至肝臟等遠(yuǎn)處器官。
在新研究中,,科學(xué)家們發(fā)現(xiàn)serglycin蛋白可作為鼻咽癌轉(zhuǎn)移的一個(gè)標(biāo)記分子,。高水平的serglycin與鼻咽癌患者的不良預(yù)后及鼻咽癌轉(zhuǎn)移呈緊密相關(guān)性。鼻咽癌細(xì)胞系的比較基因組表達(dá)譜分析的結(jié)果表明具有高轉(zhuǎn)移潛能的鼻咽癌細(xì)胞中serglycin呈高水平表達(dá),。當(dāng)利用RNAi阻斷鼻咽癌細(xì)胞中serglycin分泌時(shí),,研究人員發(fā)現(xiàn)鼻咽癌細(xì)胞的侵襲和轉(zhuǎn)移能力受到顯著抑制,這表明serglycin亦可作為終止鼻咽癌擴(kuò)散的一個(gè)重要靶標(biāo),。此外,,研究人員還證實(shí)Serglycin表達(dá)抑制導(dǎo)致了上皮間質(zhì)轉(zhuǎn)化相關(guān)的vimentin蛋白表達(dá)顯著抑制。在進(jìn)一步的臨床樣本分析中,,研究人員獲得了與鼻咽癌細(xì)胞系一致的實(shí)驗(yàn)結(jié)果,。
“這項(xiàng)研究不僅發(fā)現(xiàn)了一個(gè)鼻咽癌轉(zhuǎn)移的重要分子標(biāo)記,并詳細(xì)解析了與這一分子相關(guān)的重要細(xì)胞進(jìn)程,,從而為制定出高效抑制癌癥轉(zhuǎn)移的治療策略指明了新方向,。”M.D.安德森癌癥中心張微教授(音譯,Wei Zhang)說,。
錢朝南教授指出除了Serglycin,,還有許多的其他因子在鼻咽癌的轉(zhuǎn)移中起重要的作用。在下一階段的研究中他計(jì)劃更深入地發(fā)掘與Serglycin協(xié)同作用參與鼻咽癌轉(zhuǎn)移的相關(guān)基因,,從而為鼻咽癌的治療找到一條高效的綜合性治療策略,。(生物谷Bioon.com)
生物谷推薦原文出處:
Cancer Research DOI:10.1158/0008-5472.CAN-10-3557
Serglycin is a theranostic target in nasopharyngeal carcinoma that promotes metastasis
Xin-Jian Li, Choon Kiat Ong, Yun Cao, yanqun xiang, Jian-Yong Shao, aikseng ooi, Li-Xia Peng, Wen-Hua Lu, Zhongfa Zhang, david Petillo, Li Qin, Ying-Na Bao, Fang-Jing Zheng, Claramae S Chia, N Gopalakrishna iyer, Tie-Bang Kang, Yi-Xin Zeng, Khee Chee Soo, Jeffrey M. Trent, Bin T Teh, and Chao-Nan Qian
Nasopharyngeal carcinoma (NPC) is known for its high metastatic potential. Here we report the identification of the proteoglycan serglycin (SRGN) as a funcationally significant marker of metastasis in this setting. Comparative genomic expression profiling of NPC cell line clones with high and low metastatic potential revealed SRGN as one of the most upregulated genes in highly metastatic cells. RNAi-mediated inhibition of SRGN expression blocked serglycin secretion and the invasive motility of highly metastatic cells, reducing metastatic capacity in vivo. Conversely, SRGN overexpression in poorly metastatic cells increased their motile behavior and metastatic capacity in vivo. Growth rate was not influenced by serglycin in either highly or poorly metastatic cells. Secreted but not bacterial recombinant serglcyin promoted motile behavior, suggesting a critical role for glycosylation in serglycin activity. SRGN inhibition was associated with reduced expression of vimentin but not other epithelial-mesenchymal transition proteins. In clinical specimens, serglycin expression was elevated significantly in liver metastases from NPC relative to primary NPC tumors. We evaluated the prognostic value of serglycin by immunohistochemical staining of tissue microarrays from 263 NPC patients followed by multivariate analyses. High serglycin expression in primary NPC was found to be an unfavorable independent indicator of distant metastasis-free and disease-free survival. Our findings establish that glycosylated serglycin regulates NPC metastasis via autocrine and paracrine routes, and that it serves as a prognostic indicator of metastasis-free survival and disease-free survival in NPC patients.