《肿瘤防治的新挑战天津北方网权威媒体天津门户NewchallengesincancerpreventionTianjinNorthNetworktheauthorityofthemedia.ppt》由会员分享，可在线阅读，更多相关《肿瘤防治的新挑战天津北方网权威媒体天津门户NewchallengesincancerpreventionTianjinNorthNetworktheauthorityofthemedia.ppt（40页珍藏版）》请在三一办公上搜索。
1、CancerMolecular Network DiseaseCheng shujun,Gao yanning,Zhang kaitai,Xiao TinCancer Institute,Chinese Academy of Medical Sciences,Peking Union Medical College,Fortune Magazine,March 22,2004,Personalized Therapy progress and challenge,Breast cancer patients with the same stage can have markedly diffe
2、rent treatment responses.The clinical behaviour(such as lymph node status and histological grade)fail to classify accurately outcome.Chemotherapy or hormonal therapy reduces distant metastases by one-third,however 70-80%of these patients would not developed distant metastases without the adjuvant tr
3、eatment,these patients may not benefit from the treatment,and may potentially suffer from the side effects.(Nature,2002,VOl.415,530),Breast cancer patients with the same stage can have markedly different treatment responses.The clinical behaviour(such as lymph node status and histological grade)fail
4、 to classify accurately outcome.Chemotherapy or hormonal therapy reduces distant metastases by one-third,however 70-80%of these patients would not developed distant metastases without the adjuvant treatment,these patients may not benefit from the treatment,and may potentially suffer from the side ef
5、fects.(Nature,2002,VOl.415,530),FDA NewsFOR IMMEDIATE RELEASEP07-13February 6,2007 Media Inquiries:.The MammaPrint test uses the latest in molecular technology to predict whether existing cancer will metastasize(spread to other parts of a patients body).70 genes activity confers information about th
6、e likelihood of tumor recurrence.,Imatinib(Glivec)Chronic myelogenous leukemia(CML)Bcr-abl tyrosine kinase inhibitor.CML patients have high-expression of Bcr-abl fusion protein.Gefitinib(Iressa)(epidermal growth factor receptop tyrosine kinase inhibitor)Lung adenocarcinoma patients with relatively h
7、igh frequency of EGFR gene mutation Herceptin Breast cancer Her2 monoclonal antibody Ttumor regression 11-26%for unselected breast cancer patients,34%for HER2-positive breast cancer patients(Nature Review cancer,2006,6:735-741),Wood,LD,et.al(Science,2007,Nov.16,Vol.318:1108)isolated DNA from 11 brea
8、st and 11 colorectal tumors and determined the sequences based on exons representing 20,857 transcript from 18,191gene.Any gene that was mutated in the tumor but not in normal tissue from the same patients was analyzed in 24 additional tumors.Pathway rather than individual genes appear to govern the
9、 course of tumorigenesis.Disruption of a pathway by mutation in any one of its genetic components would presumably lead to similar changes in growth.The 15 driver mutation in an individual tumor likely reflect alterations in a similar number of pathways.,A few gene mountains are mutated in a large p
10、roportion of tumors;most genes are mutated in 5%of tumors represented as hills两个肿瘤突变基因重复的很少，(Science 2007,318:1108),Greenman,C et al(Nature,2007,446:153-)reported 1,000 somatic mutations found in the coding exons of 518 protein kinase genes in 210 diverse human cancers.There was substantial variatio
11、n in the number and pattern of mutations in individual cancer.Most somatic mutations are likely to be passengers that do not contribute to oncogenesis.However,there was evidence for driver mutation contributing to the development of the cancer studied in approximately 120 genes.,Thomas,RK et al.(Nat
12、ure genetics,2007,39:347-)determined 238 known oncogen mutation across 1,000 human tumor samples of 17 cancer types.Of 17 oncogens analyzed,they found 14 to be mutated at least once,and 298(30%)samples carried at least one mutation,Sian jones,et al,Scienceexpress,2008,Sep.4,1-10 检查了24例胰腺癌的20661蛋白编码基
13、因Pancreatic cancer contain an average of 63 genetic alterations,the majority of which are point mutations.These alterations defined a core set of 12 cellular signaling pathways,1).Wood,LD,et.al determined the 乳腺癌和结直肠癌 DNA sequences based on exons of 20,857 transcript from 18,191gene.(Science,2007,No
14、v.16,Vol.318:1108)2).Thomas RK,et al 分析17类肿瘤 238个oncogenes 的突变(Nature genetics,2007:39;153-)3).Greenman,C;et al.分析210个不同人的肿瘤的 518 protein kinase gene exons 的突变(Nature,2007,446:153-)The mutated genes in two colorectal tumors overlap to only a small extentPathway rather than individual genes appear to
15、 govern the course of tumorigenesis.Disruption of a pathway by mutation in any one of its genetic components would presumably lead to similar changes in growth.The differences are likely to be the basis for the wide variation in tumor behavior and responsiveness to therapythe acquisition of numerous
16、 somatic mutations,each with a small fitness advantage,may also drive tumourigenesis,Molecular lesions that occur in early stage of cancer or in precursor lesions are more likely to have a direct influence on cancer occurrence and progression than those that accumulate at the later stage of cancer d
17、evelopment.Among the latter,many alterations may be considered as passengers.,Next-generation sequencing CancerWhole Genome Sequencing,Recurring mutations found by sequencing an acute myeloid leukemia genome.N Engl J Med.2009 Sep 10;361(11):1058-66,38-year-old man of European ancestry DNA samples fr
18、om the patients bone marrow sample and a normal skin-biopsy specimen obtained The AML genome that we sequenced contains approximately 750 point mutations,We identified 12 acquired(somatic)mutations within the coding sequences of genes and 52 somatic point mutations in conserved or regulatory portion
19、s in the tumor sample.Four of the 64 mutations occurred in at least 1 additional AML sample in 188 samples that were tested,A comprehensive catalogue of somatic mutations from a human cancer genomePublished online 16 December 2009.Nature 08658,we have sequenced the genomes of a malignant melanoma an
20、d a lymphoblastoid cell line from the same person We identified 33,345 somatic base substitutions.A total of 32,325 were single-base and 510 were double-base substitutions,A small-cell lung cancer genome with complex signatures of tobacco exposure/nature Published online 16 December 2009,.Using mass
21、ively parallel sequencing technology,we sequenced a small-cell lung cancer cell line,NCI-H209,NCI-BL209(an EpsteinBarr-virus-transformed lymphoblastoid line has been generated from the patient.)to explore the mutational burden associated with tobacco smoking.A total of 22,910 somatic substitutions w
22、ere identified,including 134 in coding exons.One mutation for every 15 cigarettes smoked.,Cancer Molecular network disease caused by cellular abnormal growth and differentiation related to developmental genome,PNAS,2007,104:8685-,Gene Expression Profiles in Different Phases of Human Lung Embryonic D
23、evelopment and Tumorigenesis,Development landscape,Embud,Early FL,Mid FL,Adult L,(41k probes),The dynamic gene expressing patterns in human developmental process,Clinical Significance,The expression level of these genes was correlated with survival cancer patients.Type of cancersAdenocarcinoma of th
24、e lung（242 samples)117,125 samplesBrain Cancer（268 samples）Breast Cancer（1077samples）249,159,179,286 samples,P=0.041,Overall survival analysis of 49 lung ADC patients,Survival analysis of stage I lung ADC patients:the relationship between the development related genes and the prognosis of stage I lu
25、ng ADC patients.,Survival analysis of glioma patients:The relationship between the development related genes and the overall survival of patients with glioma.,The expression level of development related genes was associated with the relapse-free survival of the breast cancer patients,which was confi
26、rmed in 7 independent datasets,involving 1300 samples.,The expression level of development related genes was associated with the overall survival of the breast cancer patients,which was confirmed in 3 independent datasets.,The expression level of development related genes was associated with both th
27、e overall survival and the relapse-free survival of the breast cancer patients without lymph note metastasis(N0).,For the patients treated with Tamoxifen,the expression level of the development related genes was associated with their prognoses.,The expression level of the development related genes w
28、as also associated with the prognoses of the patients not treated with Tamoxifen.,The expression level of development related genes was associated with the Elston Histologic Grade of breast cancer.Most patients with Grade 1 breast cancer(good prognosis)had a lower expression level of the development
29、 related genes.And most patients with Grade 3(bad prognosis)had a higher expression level.However,the patients with Grade 2,whose prognosis was unpredictable according to Elston Histologic Grade,could still be divided into two groups with different expression level of development related genes.,And
30、the prognosis of the two groups of Elston Grade 2 patients was significantly different.,Cancer prevention and treatment(present and future),High-risk individual-Precancerous lesions-invasive cancer Future present prevention(life style)Surgery Network drugs radiotherapy Vaccine chemotherapy new-thera
31、py,Key Steps for cancer research in the FutureTo intensify clinical investigation on human cancer and set up tumor tissue banks(translational study).To establish high-throughput platforms for fast analysis of genes,proteins,cell structures and functions through a synthetic approach.Systematic analysis of both clinical and basic research data with bioinformatics.,Thank you,
