The gene mutation that identifies the lung cancer patients most likely to respond to the drug gefitinib (Iressa) is not associated with a response to the drug cetuximab (Erbitux), according to a new study published in the August 17 issue of the Journal of the National Cancer Institute. Both drugs target the same gene but through different mechanisms.
Some patients with non–small-cell lung cancer (NSCLC) have mutant versions of the epidermal growth factor receptor (EGFR). This protein activates signaling pathways involved with cell growth and survival. Previous studies have shown that small-molecule EGFR inhibitors such as gefitinib and erlotinib (Tarceva) work by blocking signals in the intracellular domain of EGFR--between the EGFR and the cell nucleus. Additionally, many NSCLC patients with mutations in this intracellular domain of EGFR appear to benefit from these drugs.
Toru Mukohara, M.D., of the Dana-Farber Cancer Institute in Boston, and colleagues decided to examine the effectiveness of another type of drug that targets EGFR--a monoclonal antibody called cetuximab, which is approved for the treatment of metastatic colorectal cancers that overexpress EGFR. Cetuximab targets EGFR by preventing its activation by extracellular signals, or signals occurring outside of the cell, as opposed to the intra-cellular signal blocking of drugs like gefitinib.
Elana Hayasaka | EurekAlert!
One step closer to reality
20.04.2018 | Max-Planck-Institut für Entwicklungsbiologie
The dark side of cichlid fish: from cannibal to caregiver
20.04.2018 | Veterinärmedizinische Universität Wien
University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.
Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...
In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
20.04.2018 | Physics and Astronomy
20.04.2018 | Interdisciplinary Research
20.04.2018 | Physics and Astronomy