Bayesian Random Segmentation Models to Identify Shared Copy Number Aberrations for Array CGH Data.
Bayesian Random Segmentation Models to Identify Shared Copy Number Aberrations for Array CGH Data.
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贝叶斯随机分割模型以识别数组CGH数据的共享拷贝数畸变。
DOI:
10.1198/jasa.2010.ap09250
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发表时间:
2010-12
影响因子:
3.7
通讯作者:
Morris JS
中科院分区:
文献类型:
--
作者:
Baladandayuthapani V;Ji Y;Talluri R;Nieto-Barajas LE;Morris JS
Array-based comparative genomic hybridization (aCGH) is a high-resolution high-throughput technique for studying the genetic basis of cancer. The resulting data consists of log fluorescence ratios as a function of the genomic DNA location and provides a cytogenetic representation of the relative DNA copy number variation. Analysis of such data typically involves estimation of the underlying copy number state at each location and segmenting regions of DNA with similar copy number states. Most current methods proceed by modeling a single sample/array at a time, and thus fail to borrow strength across multiple samples to infer shared regions of copy number aberrations. We propose a hierarchical Bayesian random segmentation approach for modeling aCGH data that utilizes information across arrays from a common population to yield segments of shared copy number changes. These changes characterize the underlying population and allow us to compare different population aCGH profiles to assess which regions of the genome have differential alterations. Our method, referred to as BDSAcgh (Bayesian Detection of Shared Aberrations in aCGH), is based on a unified Bayesian hierarchical model that allows us to obtain probabilities of alteration states as well as probabilities of differential alteration that correspond to local false discovery rates. We evaluate the operating characteristics of our method via simulations and an application using a lung cancer aCGH data set.
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影响因子:
8.8
作者:
通讯作者:
--
DOI:
10.2307/2347570
发表时间:
1992-01-01
影响因子:
1.6
作者:
CARLIN, BP;GELFAND, AE;SMITH, AFM
通讯作者:
SMITH, AFM
影响因子:
4.4
作者:
Hutter, Marcus
通讯作者:
Hutter, Marcus
影响因子:
2.4
作者:
Brooks, SP;Giudici, P
通讯作者:
Giudici, P
影响因子:
1.9
作者:
Guo, WS
通讯作者:
Guo, WS