A non-human, cellular molecule is absorbed into human tissues as a result of eating red meat and milk products, according to a study by researchers at the University of California, San Diego (UCSD) School of Medicine, published online the week of September 29, 2003 in Proceedings of the National Academy of Sciences. The researchers also showed that the same foreign molecule generates an immune response that could potentially lead to inflammation in human tissues.
Several previous studies have linked ingestion of red meat to cancer and heart disease, and possibly to some disorders involving inflammation. However, that research has primarily focused on the role of red-meat saturated fats and on products that arise from cooking. The UCSD study is the first to investigate human dietary absorption of a cell-surface molecular sugar called N-glycolylneuraminic acid (Neu5Gc), which is found in non-human mammals. Not produced in humans, Neu5Gc occurs naturally in lamb, pork and beef, the so-called “red meats”. Levels are very low or undetectable in fruits, vegetables, hen’s eggs, poultry and fish.
Conducting laboratory studies with human tissue, followed by tests in three adult subjects, the UCSD team provided the first proof that people who ingest Neu5Gc absorb some of it into their tissues. In addition, they demonstrated that many humans generate an immune response against the molecule, which the body sees as a foreign invader.
Sue Pondrom | UCSD
Researchers invent tiny, light-powered wires to modulate brain's electrical signals
21.02.2018 | University of Chicago
The “Holy Grail” of peptide chemistry: Making peptide active agents available orally
21.02.2018 | Technische Universität München
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
21.02.2018 | Life Sciences
21.02.2018 | Life Sciences
21.02.2018 | Materials Sciences