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Primeur weekly 2014-03-24

Special

Crowd computing takes a closer look at the social life of molecules ...

Exascale supercomputing

Dongarra calls for renewed focus on research into high-end math ...

The Cloud

HP expands testing for mobile and Cloud-based application delivery ...

Kamal Osman Jamjoom Group LLC transforms performance management system with Oracle HCM Cloud ...

EuroFlash

HPC performance insight improves usage at Cardiff University ...

Early-Bird registration opens for International Supercomputing Conference ...

Europe's most powerful supercomputer cleared for users ...

Bright Computing expands product line to manage HPC, OpenStack, and Apache Hadoop clusters ...

World-renowned computational biophysicist, Klaus Schulten to deliver ISC'14 keynote ...

Innovative computer under scrutiny ...

Plans for world class research centre in the United Kingdom ...

2nd International Workshop on OpenCL full technical programme is now available ...

Excelian offers a fully managed compute Grid solution with pay-as-you-go infrastructure costs ...

Prêt-à-fabriquer: Real-time simulation of textiles ...

Follow the ant trail for drug design ...

CFAED presents the new microchip 'Tomahawk 2' at the DATE'14 in Dresden ...

USFlash

Cray to install China's first Cray XC30 supercomputer at Hong Kong Sanatorium and Hospital ...

Dot Hill storage products drill down to support oil & gas applications ...

The New York Genome Center and IBM Watson Group announce collaboration to advance genomic medicine ...

SDSC's Gordon supercomputer assists in whole-genome sequencing analysis under collaboration with Janssen ...

HP delivers powerful system with faster analytics engine for SAP HANA environments ...

Southern Methodist University announces name for new supercomputer: ManeFrame ...

Oregon physicists use geometry to understand 'jamming' process ...

NIST chips help BICEP2 telescope find direct evidence of origin of the universe ...

University of Idaho researchers gain new advantage with one of the nation's most powerful computers ...

Study finds forest corridors help plants disperse their seeds ...

Computer analyzes massive clinical databases to properly categorize asthma patients ...

Start-up focuses on reliable, efficient cooling for computer servers ...

Computer analyzes massive clinical databases to properly categorize asthma patients

17 Mar 2014 Pittsburgh - So many variables can contribute to shortness of breath that no person can keep them all straight. But a computer programme, capable of tracking more than 100 clinical variables for almost 400 people, has shown it can identify various subtypes of asthma, which perhaps could lead to targeted, more effective treatments.

Wei Wu, a Carnegie Mellon University computational biologist who led the analysis of patient data from the federally funded Severe Asthma Research Programme, said many of the patient clusters identified by the computational methods are consistent with subtypes already recognized by clinicians. Those include types of asthma related to allergies, sinus disease or environmental factors. But the analysis also identified clusters of patients that suggest new subtypes, including one in which frequent, severe asthma symptoms appear to be associated with poor quality of life or depression in some obese women.

The findings by Wei Wu and her collaborators, including physicians at nine major medical centres, have been published on-line by theJournal of Allergy and Clinical Immunology.

"The ultimate goal is to develop treatments that are based on the biological mechanisms underlying each cluster of patients, rather than simply treating the symptoms", stated Wei Wu, an associate research professor in Carnegie Mellon's Lane Center for Computational Biology. To that end, she and her collaborators now seek to analyze genetic and genomic factors associated with each of the patient clusters, which promises to identify specific targets for drug treatments.

To identify these patient clusters, Wei Wu used machine learning algorithms, which are computational techniques that are capable of finding patterns in the data as well as learning from data and improving their performance with experience. The analysis was based on 112 variables, such as those measuring various lung functions, immune factors, family history, environmental factors and medical history, for each of 378 people with and without asthma.

Other researchers have used statistical techniques to cluster asthma patients, but none has been able to account for as many variables for each patient as this new study.

"This approach has implications not just for asthma, but for all complex diseases, which include most chronic diseases", stated lead co-author Dr. Sally E. Wenzel, director of the University of Pittsburgh Asthma Institute at UPMC and the University of Pittsburgh School of Medicine. Like asthma, such diseases as osteoporosis, Alzheimer's disease, kidney disease, Parkinson's disease and autoimmune diseases are caused by combinations of numerous genetic, environmental and lifestyle factors.

Dr. Wenzel said physicians might be able to integrate 10 clinical variables as they evaluate patients with complex diseases, but tracking 100 variables across a large patient population is a near-impossible task. Moreover, physicians have biases that can cloud their analyses.

"Only a few years ago, we were persuaded that medications worked for everyone and that the only reason people had severe symptoms was that they weren't taking their medications", Dr. Wenzel stated. But that has proven not to be the case, as underscored in this latest analysis, which identified a cluster of patients who were heavily medicated with corticosteroids to reduce airway inflammation and who had biological evidence for using them, yet continued to suffer severe shortness of breath.

The study identified several patient clusters that correspond with clinically recognized patient subtypes, but it also identified a new group composed largely of female Hispanics who were obese and reported low quality of life. Though they had normal lung function with little inflammation, they suffered frequent and severe symptoms. Wei Wu said more investigation is needed to identify what is causing asthma symptoms in this patient cluster. Conceivably, this finding could encourage doctors to screen some patients for depression, she added.

Many asthma patients respond well to corticosteroids, but others likely need personalized treatment that targets specific genetic or genomic factors. For a complex disease such as asthma, the gene expression studies necessary for pinpointing those targets are unlikely to be successful if patients aren't correctly categorized. Wei Wu said computational techniques can play an important role in this initial step of identifying and grouping similar patients together.

This research was sponsored by the National Institute of General Medical Sciences and the National Heart Lung and Blood Institutes of the National Institutes of Health.
Source: Carnegie Mellon University

Back to Table of contents

Primeur weekly 2014-03-24

Special

Crowd computing takes a closer look at the social life of molecules ...

Exascale supercomputing

Dongarra calls for renewed focus on research into high-end math ...

The Cloud

HP expands testing for mobile and Cloud-based application delivery ...

Kamal Osman Jamjoom Group LLC transforms performance management system with Oracle HCM Cloud ...

EuroFlash

HPC performance insight improves usage at Cardiff University ...

Early-Bird registration opens for International Supercomputing Conference ...

Europe's most powerful supercomputer cleared for users ...

Bright Computing expands product line to manage HPC, OpenStack, and Apache Hadoop clusters ...

World-renowned computational biophysicist, Klaus Schulten to deliver ISC'14 keynote ...

Innovative computer under scrutiny ...

Plans for world class research centre in the United Kingdom ...

2nd International Workshop on OpenCL full technical programme is now available ...

Excelian offers a fully managed compute Grid solution with pay-as-you-go infrastructure costs ...

Prêt-à-fabriquer: Real-time simulation of textiles ...

Follow the ant trail for drug design ...

CFAED presents the new microchip 'Tomahawk 2' at the DATE'14 in Dresden ...

USFlash

Cray to install China's first Cray XC30 supercomputer at Hong Kong Sanatorium and Hospital ...

Dot Hill storage products drill down to support oil & gas applications ...

The New York Genome Center and IBM Watson Group announce collaboration to advance genomic medicine ...

SDSC's Gordon supercomputer assists in whole-genome sequencing analysis under collaboration with Janssen ...

HP delivers powerful system with faster analytics engine for SAP HANA environments ...

Southern Methodist University announces name for new supercomputer: ManeFrame ...

Oregon physicists use geometry to understand 'jamming' process ...

NIST chips help BICEP2 telescope find direct evidence of origin of the universe ...

University of Idaho researchers gain new advantage with one of the nation's most powerful computers ...

Study finds forest corridors help plants disperse their seeds ...

Computer analyzes massive clinical databases to properly categorize asthma patients ...

Start-up focuses on reliable, efficient cooling for computer servers ...