Isabelle Fournier and her team are out to change surgical oncology.
“Better surgery is associated with better prognosis and higher survival,” said Fournier, a professor at the University of Lille and co-director of a proteomics center of INSERM, the French national institute of health. Her laboratory has worked for several years on a device they call the SpiderMass that will enable surgeons to look for markers of cancer in a living patient’s tissue, during an operation. In an article in Molecular & Cellular Proteomics, the team reports on an important step toward finding protein biomarkers during surgery.
Surgery to remove a primary tumor involves a wait. After the tumor and some healthy surrounding tissue are removed, the surgical team pauses while a pathologist checks the tissue margins under a microscope. Although this process is important for preventing recurrence of the cancer, it can add up to 45 risky minutes under anesthesia.
With the new device, Fournier said, “We think that it is possible to open the way to in vivo real-time proteomics,” which could help surgeons find stray cancer cells faster, perhaps even as they make incisions.
Fournier’s device uses mass spectrometry, which measures the mass of molecules from complex mixtures. But turning an in vivo tissue sample into gas phase ions for measurements can be a challenge. Until now, no one knew how to extract ions from living tissues without doing harm.
So Fournier’s team got creative. Riffing on MALDI, an ionization strategy that uses a carrier molecule mixed with the analyte of interest, they decided to use the water that makes up a majority of human tissue as a carrier to produce a water-assisted laser desorption/ionization, or WALDI. If they could excite the water in a tiny area, it should vaporize, taking ionized organic molecules with it.
“It was an idea at the beginning, and many people thought that it would not work,” Fourier said. “Finally, we have it working beautifully.”
The team built a pulsed laser excitation device tuned to heat water precisely by causing vibration in the oxygen-hydrogen bond. In a 2016 paper, they described using this laser to ionize the outermost layer of tissue, penetrating less than one-twentieth of a millimeter. The human volunteers reported a slight tingling sensation. But the ions that appeared were mostly small molecules and lipids, which are more apt than proteins to adopt a negative charge. The team hoped to measure proteins as well.
In this new paper, Fournier and colleagues report that they have cracked the protein puzzle. By using a more sensitive mass spectrometer and looking for positively instead of negatively charged ions, they found peaks representing purified proteins they had introduced into a cow liver sample. Now that they know the proteins are detectable, the next step will be finding ways to amplify the protein signal over more abundant lipids and metabolites.
In the meantime, the device is already in use for four-legged patients. Fournier’s lab has worked with the veterinary biotech company Oncovet Clinical Research to run a pilot trial, comparing biopsies from pet dogs with sarcoma to healthy tissues. The team developed a lipidomics- and metabolomics-based classification system to robustly identify healthy, necrotic and cancerous tissues. Soon, they will introduce a prototype into a veterinary operating room. If it is successful there, Fournier said, she hopes to reach human clinics, improving tumor removal surgery to give patients better health outcomes.
The Latest on: Proteomics
via Google News
The Latest on: Proteomics
- Parallel Accumulation Serial Fragmentation (PASEF) Acquisition Method with the timsTOF Pro on November 15, 2018 at 1:10 am
Mass spectrometry (MS)-based proteomics has become a powerful technology that allows researchers to dig deeper and faster into the proteome. It can be utilized for the identification and quantificatio... […]
- Data-Driven Medicine Will Help People — But Can It Do So Equally? on November 14, 2018 at 9:16 pm
The promise of data-driven medicine is clear. Using the latest analytical techniques can lead to better health outcomes and — over time as data technology inevitably becomes cheaper and more widely av... […]
- Proteomics Might Have Saved My Mother’s Life. And It May Yet Save Mine. on November 14, 2018 at 9:16 pm
The sergeant with the Mount Crested Butte Police Department in Colorado appeared and I was with my wife and our two young children, ages 2 and 7, at Lake Irwin, a remote campsite at 10,200 feet in the ... […]
- Microfluidic Device System Market: Rising Demand for Microfluidic Devices in Proteomics and Genomics to Bolster the Market Growth on November 12, 2018 at 12:39 pm
Albany, NY -- (SBWIRE) -- 11/12/2018 -- In the last few years, the developments of microfluidic components and tools have been enthralling for the life science and pharmaceutical industries. Moreover, ... […]
- Proteomics Market Dynamics, Segments and Supply Demand 2016-2026 on November 9, 2018 at 4:38 pm
Proteome is an entire set of proteins which is produced by a system or an organism. It can vary with different time, requirements, stresses, that an organism goes through. Proteomic is a systematic st... […]
- Proteomics International Laboratories set to ship first commercial batch of its immunoassay kit on November 8, 2018 at 9:39 pm
Proteomics International Laboratories Ltd (ASX:PIQ) will ship the first commercial batch of its new PromarkerD immunoassay kit on November 20, 2018 following positive performance verification results. ... […]
- Springer Nature to publish the Journal of Proteins and Proteomics on November 6, 2018 at 6:43 am
An international, peer-reviewed journal that amalgamates two important areas of life sciences research - proteins and proteomics - has become part of the Springer Nature journal portfolio. The Journal ... […]
- Proteomics Market: In-Depth Market Research and Major Growth Report by 2026 on November 5, 2018 at 7:30 am
Future Market Insights has announced the addition of the “Proteomics Market: Global Industry Analysis and Opportunity Assessment 2016-2026 " report to their offering. Proteome is an entire set of prot... […]
via Bing News