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Roche NimbleGen and BGI Develop Advanced MHC Region Capture Technology for Human Disease and Biomedical Research
Date:11/28/2011

SHENZHEN, China, November 28, 2011 /PRNewswire/ --

Roche NimbleGen, Inc. and BGI, the world's largest genomic organization, announced that they have developed a Major Histocompatibility Complex (MHC) region capture technology based on NimbleGen SeqCap EZ Choice Library, a revolutionary process for the enrichment of the MHC region. This newly developed approach allows easy capture and enrichment of these highly repetitive regions and enables the generation of deep sequencing coverage of the human MHC region. This new sample preparation approach overcomes the limitations of traditional methods of PCR and genomic enrichment used for disease and drug research.

Major Histocompatibility Complex is a large cluster of genes found on the short arm of chromosome 6, covering a 3.6Mb region that includes 150 expressing genes. MHC has been shown to play a critical role in the development or progression of hundreds of diseases, including cancers, AIDs, diabetes, arteriosclerosis and leukemia. Given its integral function in the regulation of immune system, MHC has become a key target in drug research and development for a number of diseases.

MHC shows a high degree of polymorphism which complicates the studies of genes in this region, and its gene density (37 per Mb) is five times higher than the average gene density of the whole genome (7 per Mb). Because of it polymorphic nature, linkage disequilibrium, and inheritance of haplotype, MHC has been targeted for a wide range of research applications, including population evolution, paternity testing, HLA typing and organ transplant matching.

This new MHC region capture technology not only targets the traditional MHC region (3.37MB), its targets approximately 1.6Mb of the regions surrounding MHC, providing a total of 4.97Mb (chr6: 28477797-33448354) and includes 8 known haplotypes.

"This new technology enables targeted sequencing of 97% or more of the overall MHC region, and close to 100% coverage of the gene coding regions," said Hui Jiang, Technical Specialist at BGI. "The high accuracy of this new technology is demonstrated by a 99.42% concordance with traditional genotyping technologies.  But not only does this technology enable accurate genotyping of known SNPs, it provides the opportunity to discover novel SNPs."

"This MHC region capture technology had been optimized by advanced probe design and capturing methods with Roche NimbleGen, which greatly increases the coverage and capture efficiency of MHC region compared to all other approaches we have attempted in the past. Meanwhile, the pooling technology has been improved, which not only can efficiently capture multiple samples in a single reaction, but it also significantly reduces the cost. I believe the combination of this revolutionary capture technology with high-throughput sequencing technologies will help advance research and development of new medicines for human diseases." said Jiang.

About Roche

Headquartered in Basel, Switzerland, Roche is a leader in research-focused healthcare with combined strengths in pharmaceuticals and diagnostics. Roche is the world's largest biotech company with truly differentiated medicines in oncology, virology, inflammation, metabolism and CNS. Roche is also the world leader in in-vitro diagnostics, tissue-based cancer diagnostics and a pioneer in diabetes management. Roche's personalised healthcare strategy aims at providing medicines and diagnostic tools that enable tangible improvements in the health, quality of life and survival of patients. In 2010, Roche had over 80'000 employees worldwide and invested over 9 billion Swiss francs in R&D. The Group posted sales of 47.5 billion Swiss francs. Genentech, United States, is a wholly owned member of the Roche Group. Roche has a majority stake in Chugai Pharmaceutical, Japan. For more information: http://www.roche.com.

About BGI

BGI was founded in Beijing, China, in 1999 with the mission to become a premier scientific partner for the global research community. The goal of BGI is to make leading-edge genomic science highly accessible, which it achieves through its investment in infrastructure, leveraging the best available technology, economies of scale, and expert bioinformatics resources. BGI, and its affiliates, BGI Americas and BGI Europe, have established partnerships and collaborations with leading academic and government research institutions as well as global biotechnology and pharmaceutical companies, supporting a variety of disease, agricultural, environmental, and related applications.

BGI has a proven track record of excellence, delivering results with high efficiency and accuracy for innovative, high-profile research: research that has generated over 170 publications in top-tier journals such as Nature and Science. BGI's many accomplishments include: sequencing one percent of the human genome for the International Human Genome Project, contributing 10 percent to the International Human HapMap Project, carrying out research to combat SARS and German deadly E. coli, playing a key role in the Sino-British Chicken Genome Project, and completing the sequence of the rice genome, the silkworm genome, the first Asian diploid genome, the potato genome, and, more recently, have sequenced the human Gut Metagenome, and a significant proportion of the genomes for the1000 Genomes Project,

For more information about BGI, please visit http://www.genomics.cn

For life science research only. Not for use in diagnostic procedures.

NIMBLEGEN and SEQCAP are trademarks of Roche.

All other product names and trademarks are the property of their respective owners.

For further information please contact:

Roche Diagnostics
Dr. Burkhard Ziebolz
Phone: +49 8856 604830
Email: burkhard.ziebolz@roche.com

Roche NimbleGen
Kary Staples
Phone: +1-608-218-7623
Email: kary.staples@roche.com

BGI
Hui Jiang,
Associate Director, S&T
Email: jianghui@genomics.cn
http://www.genomics.cn

BGI
Bicheng Yang
Public Communication Officer
Phone: +86-755-82639701
Email: yangbicheng@genomics.cn
http://www.genomics.cn


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