Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Novel method to benchmark and improve the performance of protein measumeasurement techniques

25.10.2016

Quantum leap in the reliability of mass spectrometry-based proteomics

Modern mass spectrometry systems enable scientists to routinely determine the quantitative composition of cells or tissue samples. However, different analysis software packages often produce different results from the same raw data. An international team of researchers led by Professor Stefan Tenzer from the Mainz University Medical Center has now addressed this problem.


From sample to accurate results – mass spectrometry finds a common denominator at last

photo/©: Stefan Tenzer, Mainz University Medical Center

In the framework of an international collaboration with leading laboratories worldwide, the team has compared and modified various analysis software packages to ensure that the different software solutions produce consistent results. A wide range of laboratories around the world are benefiting from this work, which enables researchers to analyze or compare the results of quantitative proteomics assays in a standardized way. This is crucial to detect certain organic diseases, such as cancer, at an early stage. The results of Tenzer and his team have now been published in the highly respected academic journal, Nature Biotechnology.

When doctors want to find the cause of a particular illness, they have to take samples of cells or bodily fluids. These samples are then analyzed by modern Omics techniques which enable to reproducibly quantify thousands of proteins across large numbers of samples to identify novel biomarkers for diseases. The analysis of these highly complex datasets critically depends on specialized software packages. Unfortunately, different software packages sometimes deliver divergent results from the same raw data, thus complicating the analysis.

This is exactly the problem that Professor Stefan Tenzer and his team from the Institute of Immunology at the University Medical Center of Johannes Gutenberg University Mainz (JGU) set out to resolve. "We wanted to find a way of optimally comparing samples, even when different analysis software sometimes produces deviating results," explained Tenzer. For his latest project he used two defined samples with precisely defined ratios of constituents.

The bioinformatics specialists in Tenzer's team, Dr. Pedro Navarro and Dr. Jörg Kuharev, developed a specialist piece of software, termed LFQbench. This allowed the team to study the differences between the various analysis programs in detail. "Using LFQbench, we were able to show that the results delivered by the various programs differed significantly," explained Navarro. "This finding alone has significant impact for the scientific community.

But we have taken the project a step further: Our close collaboration with the developers of the individual programs enabled them to modify and improve their analysis packages so that they now produce highly convergent results," added Tenzer. This broadens the scope of applications of the mass spectrometry technique known as quantitative proteomics. A proteome is the entirety of proteins expressed by a cell. "This means that in the future, mass spectrometry will be able to provide even more benefits both in basic research and as a potential diagnostic tool," Tenzer pointed out.

"This development represents a breakthrough for mass spectrometry-based quantitative proteomics and makes this method increasingly important as a standard procedure for use in the diagnosis of various disorders, such as cancer or allergies," emphasized the Chief Scientific Officer of the Mainz University Medical Center, Professor Ulrich Förstermann. "I am particularly proud that our researchers are delivering applied research with such significant impact."

The pioneering results were achieved under the aegis of the technology platform "Mass Spectrometry and Quantitative Proteomics" based at the Research Center for Immunotherapy (FZI) at Johannes Gutenberg University Mainz (JGU). "This success demonstrates the necessity of combining different areas of expertise in technology platforms at the University Medical Center. Without central support, it is nowadays almost impossible to accomplish achievements of this kind," said Professor Hansjörg Schild, Director of the Institute of Immunology and coordinator of the FZI for many years.

Over recent years, Professor Stefan Tenzer and his team in Mainz have developed several improvements to the techniques used for mass spectrometry-based quantitative proteomics. These methods reproducibly detect and quantify thousands of proteins in samples of cells, tissues, or bodily fluids, and enable researchers to identify proteins that are differentially expressed. "The years of work within the technology platform, especially in international joint projects, have paid off in terms of this quantum leap forward in mass spectrometry-based quantitative proteomics," concluded Tenzer.

Publication
"A multicenter study benchmarks software tools for label-free proteome quantification"
Pedro Navarro1,11, Jörg Kuharev1,11, Ludovic C Gillet2, Oliver M. Bernhardt3, Brendan MacLean4, Hannes L. Röst2, Stephen A. Tate5, Chih-Chiang Tsou6, Lukas Reiter3, Ute Distler1, George Rosenberger2,7, Yasset Perez-Riverol8, Alexey I. Nesvizhskii6,9, Ruedi Aebersold2,10, Stefan Tenzer1

1 Institute of Immunology, University Medical Center of Johannes Gutenberg University Mainz, Mainz, Germany
2 Department of Biology, Institute of Molecular Systems Biology, Eidgenoessische Technische Hochschule (IMSB-ETH) Zurich, Zurich, Switzerland
3 Biognosys AG, Schlieren, Switzerland
4 Department of Genome Sciences, University of Washington, Seattle, Washington, USA
5 AB Sciex, Concord, Ontario, Canada
6 Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan, USA
7 PhD Program in Systems Biology, University of Zurich and Eidgenoessische Technische Hochschule (ETH) Zurich, Zurich, Switzerland
8 European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Hinxton, UK
9 Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
10 Faculty of Science, University of Zurich, Zurich, Switzerland
11 These authors contributed equally to this work.

http://dx.doi.org/10.1038/nbt.3685
http://www.nature.com/nbt/index.html


Contact:
Professor Stefan Tenzer
Head of the Core Facility for Mass Spectrometry
Institute of Immunology
Mainz University Medical Center
e-mail: tenzer@uni-mainz.de

Press contact:
Oliver Kreft, Press and Public Relations, Mainz University Medical Center
phone +49 6131 17-7424, fax +49 6131 17-3496, e-mail: pr@unimedizin-mainz.de
http://www.unimedizin-mainz.de/home.html?L=1

Petra Giegerich | idw - Informationsdienst Wissenschaft

More articles from Life Sciences:

nachricht Scientists uncover the role of a protein in production & survival of myelin-forming cells
19.07.2018 | Advanced Science Research Center, GC/CUNY

nachricht NYSCF researchers develop novel bioengineering technique for personalized bone grafts
18.07.2018 | New York Stem Cell Foundation

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>