This is the result of studies carried out by the Helmholtz Centre for Environmental Research (UFZ), the University of Leipzig and the Haukeland University Hospital in Bergen. The researchers examined patients with a Nile perch allergy.
Being allergic to Nile perch does not mean also being allergic to cod. Furthermore, species-specific allergens were identified that may help to improve avoidance strategies against such food allergies and make them more specific, the researchers write in the scientific journal Journal of Investigational Allergology and Clinical Immunology (JIACI).
Fish is one of the most important foods worldwide. It is considered healthy, due to international fish trade it is obtainable everywhere and it is therefore consumed in increasing amounts. In the industrialised countries around 28 kilograms of fish is now consumed per capita and year, and the trend is on the increase. The rising supply and demand for seafood is associated with an increased risk of fish allergies.
The most common allergen in fish and crustaceans is parvalbumin, a calcium-binding protein. Other substances, however, are also suspected triggers of allergies, such as a group of proteins in cell metabolism called aldehyde dehydrogenases. It is possible that some of these proteins have been overlooked because they are overshadowed by the more frequent parvalbumin and have therefore been underestimated until now.
The most direct way of identifying new allergens is through analysing the serum of affected patients and the proteins of the allergy source. If the IgE antibodies in the patients' serum bind to the proteins of the food that triggers the allergy, this is a clear signal. The identified allergies can initially be used for individual diagnoses and later for epidemiological studies, to determine the relevance of individual allergies. In their study, the researchers examined two patients from the University Hospital Leipzig and ten from the Haukeland University Hospital in Bergen in Norway.
One of the subjects was a 24-year-old chef from Leipzig who had developed an allergy to Nile perch (Lates niloticus) after having come into contact with the raw fish following consumption of salmon (Salmo salar). Scientists know about such cross allergies. What was unusual about this case was that the patient tolerated other types of fish. Tests indicated signs of allergies to Nile perch and salmon, but not to Atlantic cod (Gadus morhua).
"The tests that are currently used are very non-specific. For some people who suffer from fish allergies there may be hope of finding a fish that they can tolerate if we managed to make the relevant tests suitable for mass implementation and use them in allergy diagnostics", says Dr Janina Tomm from the UFZ, who specialises in research into proteins.
The researchers report a similar case in a second publication. They examined proteins of the Kuruma shrimp (Marsupenaeus japonicus); they found two new enzymes, pyruvate kinase and phosphopyruvatehydratase, that could be the cause of food allergies to shellfish. In theory, both would only have a low allergenic potential.
"This shows us that even though we are significantly better at predicting allergies, computer algorithms can currently not replace biochemical experiments", emphasises Prof. Jan-Christoph Simon from the University of Leipzig. Here, too, detailed knowledge about hitherto underestimated allergens could help make the correct diagnosis in cases of shellfish allergies in the future.The allergy studies are part of the Leipzig Research Center for Civilization Diseases (LIFE), a major research project of the faculty of medicine at the University of Leipzig, which is part of the federal excellence initiative of the Free State of Saxony in collaboration with various partners such as the UFZ. Thanks to the support from LIFE, a junior research group could be set up at the Clinic for Dermatology and Allergology under Prof. Simon, which focuses on identifying new allergies.
JM Tomm, C Krause, JC Simon, R Treudler, M von Bergen, M Averbeck (2013): Pyruvate Kinase and Phosphopyruvate Hydratase as Novel IgE Reactive Proteins in Prawn. J Investig Allergol Clin Immunol 2013; Vol. 23(6): 000-000
The studies were supported by the Leipzig Research Center for Civilization Diseases (LIFE) and funded by the European Union, the European Social Fund and the excellence initiative of the Free State of Saxony.Further Information:
The Helmholtz Association contributes to solving major and urgent issues in society, science and industry through scientific excellence in six research areas: Energy, earth and environment, health, key technologies, structure of matter as well as aviation, aerospace and transportation. The Helmholtz Association is the largest scientific organisation in Germany, with 35,000 employees in 18 research centres and an annual budget of around €3.8 billion. Its work is carried out in the tradition of the great natural scientist Hermann von Helmholtz (1821-1894). http://www.helmholtz.de/
Tilo Arnhold | UFZ News
Novel mechanisms of action discovered for the skin cancer medication Imiquimod
21.10.2016 | Technische Universität München
Second research flight into zero gravity
21.10.2016 | Universität Zürich
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences