Breaking News
August 18, 2018 - Researchers win multi-million Euro award to conduct research into liver disease
August 18, 2018 - Survey highlights variations in practice of airway management in pediatric intensive care units
August 18, 2018 - UK students win sponsorship from Promega Corporation
August 18, 2018 - Janssen Reports Positive Topline Results for ATLAS Phase III Study of a Novel, Long Acting Injectable Two-Drug Regimen for the treatment of HIV-1
August 18, 2018 - PSD as a molecular platform for understanding synapse formation and plasticity
August 18, 2018 - Improved visual communication could help patients to make informed health-care decisions
August 18, 2018 - New algorithm helps identify and manage diabetic patients at increased fracture risk
August 18, 2018 - Microscopic insect odour detecting mechanisms discovered
August 18, 2018 - Researchers develop new approach to study how tuberculosis infects people
August 18, 2018 - FDA Approves Kalydeco (ivacaftor) for Cystic Fibrosis in Children Ages 12 to
August 18, 2018 - An ion channel differentiates newborn and mature neurons in the adult brain
August 18, 2018 - Socio-economic position associated with pregnant women’s exposure to environmental hazards
August 18, 2018 - Voters to settle dispute over ambulance employee break times
August 18, 2018 - AGA urges policymakers and stakeholders to improve affordability of drugs
August 18, 2018 - Increasing dietary protein may lower risk of diabetes in people with NAFLD
August 18, 2018 - New HIV therapy suppresses viral replication and increases immune cells in drug-resistant patients
August 18, 2018 - Broad Genetic Testing for NSCLC May Not Improve Survival
August 18, 2018 - Discovery opens door for synthetic opioids with less addictive qualities
August 18, 2018 - Transgenic rice plant extracts could help stop the spread of HIV
August 18, 2018 - Hologic’s Cynosure division partners with Porter Instrument to distribute nitrous oxide and oxygen system
August 18, 2018 - Two thyroid medications recalled by FDA
August 18, 2018 - Forecast Sees Abnormal Heat Worldwide Through 2022
August 18, 2018 - Childhood absence epilepsy – Genetics Home Reference
August 18, 2018 - Fearing hard Brexit, UK drugmakers stockpile to protect lives
August 18, 2018 - Discovery may help broaden the scope of defenses against HPV
August 18, 2018 - When they start thinking green, they see green
August 18, 2018 - Scientists introduce microfluidics-based chip for manipulation and analysis of single cells
August 18, 2018 - Researchers design new way to grow nose cells for treating spinal cord injuries
August 18, 2018 - New light shed on relationship between calorie-burning fat and muscle function
August 18, 2018 - Surgery Saturday Instagram series takes you inside Stanford’s OR
August 18, 2018 - Researchers uncover surprising new role for inhibition in the cerebellum
August 18, 2018 - Children have better nutrition when they live near forests, global study shows
August 18, 2018 - OHSU professor conducts clinical trial with artificial pancreas using Xeris’ liquid glucagon
August 18, 2018 - HSS takes young patients with physical challenges on a surfing trip
August 18, 2018 - Study shows electronic health records leave doctors and patients unsatisfied
August 18, 2018 - Study uncovers mechanism that affects multiplication of dengue virus lineage
August 18, 2018 - Theravance Biopharma Reports Positive Top-Line Four-Week Data from Phase 2 Trial of TD-9855 for the Treatment of Symptomatic Neurogenic Orthostatic Hypotension
August 18, 2018 - Animations prove effective in accurately measuring pain
August 18, 2018 - Three faculty members appointed to endowed positions | News Center
August 18, 2018 - New technique detects, measures, analyzes unevenly charged biomolecules
August 18, 2018 - Brief exposures to stressors can be beneficial to cells, shows study
August 18, 2018 - UTHealth-led survey shows much work remains to increase safety of e-health records
August 18, 2018 - Researchers use super-resolution microscope to unravel secrets of deadly Nipah virus
August 18, 2018 - Scientists identify pathways that reveal insights into mechanism of lung cancer etiology
August 18, 2018 - FDA approves marketing of brainsway deep transcranial magnetic stimulation system for OCD
August 17, 2018 - OUHSC gets $20 million grant to advance research and patient care for Oklahomans
August 17, 2018 - Sperm morphology differs depending on qualities of male bird
August 17, 2018 - Texas A&M researchers develop clay-based platform to grow blood vessels
August 17, 2018 - FDA Approves Expanded Indication for Orkambi (lumacaftor/ivacaftor) in Children Ages 2-5 Years
August 17, 2018 - Caring for Concussions | NIH News in Health
August 17, 2018 - Team explores diabetes drug’s ability to treat RSV infection
August 17, 2018 - New imaging technique can spot tuberculosis infection in an hour | News Center
August 17, 2018 - PolyU researchers design new self-fitting scaffold to induce bone regeneration
August 17, 2018 - CartiHeal and LSU Health successfully enroll first two patients in Agili-C IDE pivotal study
August 17, 2018 - Less-invasive options are slowing disease progression in glaucoma patients
August 17, 2018 - Researchers discover new promising target point for cancer and diabetes therapies
August 17, 2018 - Podcast: KHN’s ‘What the Health?’ See you in court!
August 17, 2018 - New mobile phone application enables early detection of cerebral ictus
August 17, 2018 - AJMC addresses role of community pharmacies in boosting adult vaccination rates
August 17, 2018 - UK’s leading sight loss charity invites applications from brightest minds in ophthalmic research
August 17, 2018 - Alternative devices can help when autoinjectors are unavailable
August 17, 2018 - Researchers produce artificial placenta model that closely resembles natural organ
August 17, 2018 - Study offers possibility of squelching a focal epilepsy seizure before symptoms appear
August 17, 2018 - FDA Alert: Temporary Total Artificial Heart Companion 2 Driver System by SynCardia Systems: Letter to Health Care Providers
August 17, 2018 - New statewide program in North Dakota aims to stem opioid misuse
August 17, 2018 - Researchers discover why sepsis from a staph infection causes organ failure
August 17, 2018 - Stony Brook University’s new medical students start a transformative journey
August 17, 2018 - Revealed: The molecular mechanism underlying hypertrophic cardiomyopathy | News Center
August 17, 2018 - New modeling studies highlight urgent need for effective drug policy reforms to prevent HIV
August 17, 2018 - Research explores relationship between personal history of infectious fever and cancer risk
August 17, 2018 - Study finds rise in cases of progressive massive fibrosis among U.S. coal miners
August 17, 2018 - NEDBELS project examines impact of neurodiversity concept on legal systems
August 17, 2018 - Seeking solutions to treat scleroderma
August 17, 2018 - Statins may improve conditions of people with rare lung disease
August 17, 2018 - Study finds why some people with brain markers of Alzheimer’s never develop dementia
August 17, 2018 - Life Biosciences contributes $100,000 to fund its biomedical innovation course on aging
August 17, 2018 - Researchers develop a set of health outcome measures for children with complex medical situations
August 17, 2018 - Many Americans Not Being Assessed for Depression
August 17, 2018 - Scientists report setbacks in quest for AIDS cure
August 17, 2018 - Christopher Gardner busts myths about milk | News Center
New research lays foundation to create standards for RNA sequencing

New research lays foundation to create standards for RNA sequencing

image_pdfDownload PDFimage_print

The idea of testing blood or urine to find markers that help diagnose or treat disease holds great promise. But as technology has improved to allow researchers to examine tiny fragments of RNA, one major problem has led to limited success.

“Different people are using different methods to sequence small RNA, and sometimes getting different results. If it keeps going on like that, it will be hard for the field to make progress,” says Muneesh Tewari, M.D., Ph.D., professor of internal medicine and biomedical engineering at Michigan Medicine.

Tewari’s lab led a group of nine labs across the United States and the Netherlands, brought together through the National Institutes of Health, that sought to solve this problem.

The consortium tested nine different methods for RNA sequencing to understand and standardize the best way to sequence small RNAs. The goal was to create a process that could be reproduced from one lab to the next.

A liquid biopsy relies largely on the ability to sequence small RNA such as microRNA. These tiny cellular fragments can become altered in diseases such as cancer, providing a clue to help spot disease in its earliest stages. But blood or urine contain only a tiny amount of RNA outside of cells, making it challenging to sequence.

“Liquid biopsy for RNA is an exciting new field for diagnostics. But the field needed this kind of consortium to come together, because of the challenge of different methods leading to results that are not reproducible,” Tewari says. He also notes a strength of this work is in bringing together varied expertise, from molecular biologists to computational and bioinformatics specialists.

For this study, which is published in Nature Biotechnology, researchers prepared samples identically and sent them across the country for each of the nine labs to analyze.

Each lab used multiple testing protocols to sequence four different samples, including a plasma sample and three synthetic RNA samples. Altogether, they tested nine different sequencing protocols, including four commercially available kits and five protocols developed by the labs. The combined data yielded more than 5 billion sequencing reads.

“We realized that not only different methods produce different results, but also any small change within a given protocol can introduce an important degree of variation. In order to compare results across labs, it is key to use a common and highly standardized protocol,” says lead study author Maria D. Giraldez, M.D., Ph.D., a post-doctoral research fellow in Tewari’s lab.

Researchers found that different methods used for sequencing produced different, often inaccurate, estimates of how abundant any individual marker was. The methods developed by the consortium labs improved the accuracy of these estimates. When RNA sequencing was used to compare the relative amounts of individual microRNAs between different samples, however, all the methods produced accurate and reproducible estimates.

“We found there was not a lot of variability if you used the same protocol across multiple labs,” says study author Ryan Spengler, Ph.D., a post-doctoral fellow in Tewari’s lab. “This means, if you want to coordinate a study between different labs, the key is to keep to the same protocol – whatever it is. Then you can compare your results.”

The analysis lays a foundation to help researchers create standard procedures around their protocols, and positions the field of RNA sequencing and liquid biopsies to move forward.

The researchers have made the synthetic reference material available, which means researchers across the country can run their test and compare results to what the consortium of labs found.

Tewari’s lab is continuing to work on improving the methodology to be more useful for discovering biomarkers.

Source:

https://labblog.uofmhealth.org/lab-report/why-consistent-testing-methods-are-crucial-for-liquid-biopsies

Tagged with:

About author

Related Articles