PURPOSE: To identify factors significantly affecting recurrence rates after postoperative external beam radiotherapy (XRT) of keloids, and to delineate any radiation dose response and effects of radiation dose per fraction. METHODS AND MATERIALS: A comprehensive...
Expression of Y-box binding protein-1 (YB-1) is associated with tumor progression and drug resistance. Phosphorylation of YB-1 at serine residue 102 (S102) in response to growth factors is required for its transcriptional activity and is thought to be regulated by cytoplasmic signaling phosphatidylinositol 3-kinase (PI3K)/Akt and mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK) pathways. These pathways can be activated by growth factors and by exposure to ionizing radiation (IR). So far, however, no studies have been conducted on IR-induced YB-1 phosphorylation.
Mahmoud Toulany, Tim-Andre Schickfluß, Wolfgang Eicheler, Rainer Kehlbach, Birgit Schittek and H Peter Rodemann
Download Paper
Radiation therapy (RT) for brain tumors is associated with neurocognitive toxicity which may be a result of damage to neural progenitor cells (NPCs). We present a novel technique to limit the radiation dose to NPC without compromising tumor coverage. A study was...
Radiation therapy can result in bone injury with the development of fractures and often can lead to delayed and nonunion of bone. There is no prevention or treatment for irradiation-induced bone injury. We irradiated the distal half of the mouse left femur to study...
BACKGROUND: The most common form of cancer in Brazil is non-melanoma skin cancer, which affects approximately 0.06% of the population. There are no public policies for its prevention and the economic impact of its diagnosis has yet to be established. OBJECTIVES: To...
The diagnosis and management of periocular cutaneous malignancies are essential components of an ophthalmologist's practice. Skin cancers comprise nearly one-third of newly diagnosed malignancies. Furthermore, the incidence of skin cancer appears to be increasing....
AIMS: The primary objective of this study was to assess the rate of tumour response to the palliative radiotherapy regimen used at our centre (8 Gy/fraction on days 0, 7, 21) for non-melanoma skin cancer. The secondary objective was to evaluate symptom palliation....
It remains difficult to distinguish tumor recurrence from radiation necrosis after brain tumor therapy. Here we show that these lesions can be distinguished using the amide proton transfer (APT) magnetic resonance imaging (MRI) signals of endogenous cellular proteins...
To study radioresistance in esophageal adenocarcinoma, we generated an isogenic cell line model by exposing OE33 esophageal adenocarcinoma cells to clinically relevant fractionated doses of radiation (cumulative dose 50 Gy). A clonogenic assay confirmed enhanced survival of the radioresistant OE33 subline (OE33 R). To our knowledge, we are the first to generate an isogenic model of radioresistance in esophageal adenocarcinoma. This model system was characterized in terms of growth, cell cycle distribution and checkpoint operation, apoptosis, reactive oxygen species generation and scavenging, and DNA damage. While similar properties were found for both the parental OE33 (OE33 P) cells and radioresistant OE33 R cells, OE33 R cells demonstrated greater repair of radiation-induced DNA damage. Our results suggest that the radioresistance of OE33 R cells is due at least in part to increased DNA repair.
Niamh Lynam-Lennon, John V Reynolds, Graham P Pidgeon, Joanne Lysaght, Laure Marignol, and Stephen G Maher
Download Paper
Contact Us