2012年11月14日 訊 /生物谷BIOON/ --近日,,來(lái)自杜克大學(xué)醫(yī)學(xué)院的研究者在對(duì)伯基特淋巴瘤(Burkitt lymphoma tumor)的基因圖譜繪制過(guò)程中,鑒別出了70個(gè)基因突變,,包括未報(bào)道的和癌癥相關(guān)的突變以及和疾病發(fā)病相關(guān)的一個(gè)特殊的基因,。相關(guān)研究刊登于11月11日的國(guó)際雜志Nature Genetis上,,為研究者開(kāi)發(fā)新型藥物或者療法提供了很大幫助。
研究者Sandeep S. Dave博士表示,,這項(xiàng)研究揭示了和疾病相關(guān)的常見(jiàn)的遺傳突變,,可以幫助我們理解疾病發(fā)病的生物學(xué)過(guò)程,為設(shè)計(jì)新型療法開(kāi)辟了新的路徑,。
文章中,,研究者首次對(duì)完整的伯基特淋巴瘤基因組進(jìn)行了測(cè)序,以及59個(gè)額外的伯基特淋巴瘤基因和94個(gè)彌漫性大B細(xì)胞淋巴瘤,,這兩種腫瘤具有很多類(lèi)似的伯基特淋巴瘤特征,,其由于腫瘤的類(lèi)似,常常引起誤診以及療法失敗,。
這項(xiàng)研究中,,研究者報(bào)道了在伯基特淋巴瘤和彌漫性大B細(xì)胞淋巴瘤之間基因突變的差異,研究者Dave說(shuō),,對(duì)于醫(yī)生來(lái)說(shuō),,準(zhǔn)確診斷伯基特淋巴瘤非常重要,一旦出現(xiàn)誤診,,使用標(biāo)準(zhǔn)療法治療彌漫性大B細(xì)胞淋巴瘤,,那么伯基特淋巴瘤患者就很有可能導(dǎo)致疾病惡化。
研究者在研究中鑒別出了在伯基特淋巴瘤中經(jīng)常突變的70個(gè)基因,,包括一系列首次鑒別出的和癌癥相關(guān)的基因,,其中一個(gè)基因突變-ID3,其在伯基特淋巴瘤中出現(xiàn)率為34%,而在彌漫性大B細(xì)胞淋巴瘤中并沒(méi)有發(fā)現(xiàn),。
突變對(duì)于抑制細(xì)胞生長(zhǎng)的基因來(lái)說(shuō)會(huì)帶來(lái)一種沉默的效應(yīng),,可以促使細(xì)胞進(jìn)行多種增殖。研究者表示,,單獨(dú)的改變或許會(huì)引發(fā)癌癥,,但是當(dāng)單一的基因突變和Myc基因一起在伯基特淋巴瘤中發(fā)生的時(shí)候,其就會(huì)加速癌癥的發(fā)展,。
這項(xiàng)研究為開(kāi)發(fā)新型用于抑制淋巴瘤癌細(xì)胞生長(zhǎng)的藥物(類(lèi)似于ID3的功能)提供了幫助,,如果研究者可以模仿ID3基因,恢復(fù)其功能就可以減緩腫瘤的生長(zhǎng),,這無(wú)疑是一種新的癌癥療法,,目前研究者表示,其需要進(jìn)行大量實(shí)驗(yàn)來(lái)開(kāi)發(fā)新型的療法治療癌癥,。(生物谷Bioon.com)
編譯自:Genome Sequencing of Burkitt Lymphoma Reveals Unique Mutation
doi:10.1038/ng.2468
PMC:
PMID:
The genetic landscape of mutations in Burkitt lymphoma
Cassandra Love,1 Zhen Sun,1 Dereje Jima,1 Guojie Li,1 Jenny Zhang,1 Rodney Miles,2 Kristy L Richards,3 Cherie H Dunphy,3 William W L Choi,4 Gopesh Srivastava,4 Patricia L Lugar,5, 6 David A Rizzieri,5, 6 Anand S Lagoo,5, 6 Leon Bernal-Mizrachi,7 Karen P Mann,7 Christopher R Flowers,7 Kikkeri N Naresh,8 Andrew M Evens,9 Amy Chadburn,10 Leo I Gordon,10 Magdalena B Czader,11 Javed I Gill,12 Eric D Hsi,13 Adrienne Greenough,1 Andrea B Moffitt,1 Matthew McKinney,1, 5, 6 Anjishnu Banerjee,14 Vladimir Grubor,1 Shawn Levy,15 David B Dunson14 & Sandeep S Dave1, 5, 6 et al.
Burkitt lymphoma is characterized by deregulation of MYC, but the contribution of other genetic mutations to the disease is largely unknown. Here, we describe the first completely sequenced genome from a Burkitt lymphoma tumor and germline DNA from the same affected individual. We further sequenced the exomes of 59 Burkitt lymphoma tumors and compared them to sequenced exomes from 94 diffuse large B-cell lymphoma (DLBCL) tumors. We identified 70 genes that were recurrently mutated in Burkitt lymphomas, including ID3, GNA13, RET, PIK3R1 and the SWI/SNF genes ARID1A and SMARCA4. Our data implicate a number of genes in cancer for the first time, including CCT6B, SALL3, FTCD and PC. ID3 mutations occurred in 34% of Burkitt lymphomas and not in DLBCLs. We show experimentally that ID3 mutations promote cell cycle progression and proliferation. Our work thus elucidates commonly occurring gene-coding mutations in Burkitt lymphoma and implicates ID3 as a new tumor suppressor gene.