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public:clonet [2014/08/20 13:54]
davide.prandi@unitn.it
public:clonet [2017/10/30 09:44] (current)
davide.prandi@unitn.it
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 === DESCRIPTION === === DESCRIPTION ===
  
-{{public:clonet_schema.png?850 | CLONET Pipeline}}+Cancer arises from initiating cells (clones) that undergo intense evolutionary selection during disease progression and can be widely altered during treatmentThe tumor cell evolutionary process may lead to subclonal divergence resulting in genetic and molecular heterogeneity. Computational approaches to establish maps of cancer evolution would assist in determining the progression status of each patient tumor and possibly inform treatment strategies. Technical challenges related to tumor DNA purity and cancer cell ploidy have been addressed but critical aspects remain for minimally aberrant or highly heterogeneous tumors.\\ 
 +Available tools all apply a global use of the genome data to infer tumor DNA purity and tumor ploidy. Global approaches are well-suited for tumor samples with fairly homogenous genomic aberrations (high ratio of clonal versus subclonal lesions). In the clinical setting where tumor samples might exhibit heterogeneity due to progression or subsequent to multiple lines of treatment and/or for tumor types that undergo complex structural changes, global approaches may prove sub-optimal as they undermine the genomic diversity.\\ 
 +CLONET belongs to a second generation of tools based on local (in contrast to global) optimization where estimates of purity and ploidy are derived from few clonal events. CLONET exploits individuals’ genetic background by using the abundant germline heterozygous SNP (called //informative SNPs//) genotype data provided by whole genome sequence coverage to quantify the percentage of reads supporting the considered aberration. A closed-form solution relates aberrant reads with clonality status and allows propagating uncertainty due to sequencing. CLONET computes the clonality of somatic copy number changes, point mutations, and rearrangements in a coherent mathematical model enabling comparison across tumor types of the same aberration class and across different aberrations within the same tumor type. Finally, the temporal path along which the somatic aberrations originated is inferred from the composite frequencies at which they are observed to be clonal or subclonal in a single sample. CLONET allows harnessing NGS data, including whole genome, whole exome, and targeted sequencing, to determine the percentage of tumor cells harboring each mutation and to draft evolution charts.
  
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 +{{ public:clonet_schema.png?750 |  CLONET Pipeline }} 
 +
 +
 +=== REFERENCES ===
 +
 +Prandi et al.: **Unraveling the clonal hierarchy of somatic genomic aberrations**. //Genome Biology// 2014, **15**:439.
 +
 +----
  
-=== INTRODUCTION ===+=== BASIC USAGE ===
 CLONET is a collection of R scripts that allows: CLONET is a collection of R scripts that allows:
   * computing global DNA admixture (1-purity) and ploidy of tumor DNA samples (each with matched normal sample) from sequencing data (WGS, WES, targeted)   * computing global DNA admixture (1-purity) and ploidy of tumor DNA samples (each with matched normal sample) from sequencing data (WGS, WES, targeted)
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 The Functions folder contains all the functions used by CLONET.\\ The Functions folder contains all the functions used by CLONET.\\
 The Tools folder contains R scripts to perform point mutations (PM) analysis, structural rearrangement (RR) analysis and tumor evolution path analysis.\\ The Tools folder contains R scripts to perform point mutations (PM) analysis, structural rearrangement (RR) analysis and tumor evolution path analysis.\\
 +
 +----
 +
 === REQUIREMENTS === === REQUIREMENTS ===
 CLONET requires Linux kernel >= 2.6.15. CLONET requires Linux kernel >= 2.6.15.
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 CLONET recommends ASEQ tool to generate initial pileup analysis (binaries provided). CLONET recommends ASEQ tool to generate initial pileup analysis (binaries provided).
  
- +---- 
-=== DISCLAIMER ===+=== COPYRIGHT  ===
 Code by Davide Prandi\\ Code by Davide Prandi\\
 Laboratory of Computational Oncology (F. Demichelis)\\ Laboratory of Computational Oncology (F. Demichelis)\\
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 CLONET is distributed under the MIT Licence. CLONET is distributed under the MIT Licence.
  
 +----
 === DOWNLOADS === === DOWNLOADS ===
  
-  * {{:CLONET_20140806.zip|CLONET}}+  * {{:CLONET_20140806.zip|CLONET (for backward compatibility}} 
 +  * {{:CLONET.v2.20171016.zip|CLONET v2 (version suggested)}}
   * {{:aseq-v1.1.7-linux32.tar.gz|ASEQ binaries (linux 32bit)}}   * {{:aseq-v1.1.7-linux32.tar.gz|ASEQ binaries (linux 32bit)}}
   * {{:aseq-v1.1.7-linux64.tar.gz|ASEQ binaries (linux 64bit)}}   * {{:aseq-v1.1.7-linux64.tar.gz|ASEQ binaries (linux 64bit)}}