Tag Archives: formation

‘Molecular scaffolding’ found that maintains skin structure, organization

A study by the Spanish National Cancer Research Centre (CNIO), featured on the cover of the Journal of Cell Biology, shows how interactions between skin stem cells — the cells responsible for the constant renewal of skin — maintain the architecture of this organ. "We knew that these junctions were important in skin stem cells but the cellular components involved in their structure and function were not yet understood," says Mirna Pérez-Moreno, head of the Epithelial Cellular Biology Group that led the study. Using skin cells derived from mice, researchers have discovered that one of the key elements in the formation and stabilisation of these junctions are microtubules, tubular structures that are part of all cells and that serve as pillars to maintain their form and function. "We have seen for the first time that skin stem-cell microtubules connect with cell-cell junctions to form velcro-like structures that hold the cells together," says Marta Shahbazi, a researcher on Pérez-Moreno’s team and the first author of the study…

Ovarian cancer discovery deepens knowledge of survival outcomes

The research, led by Dong-Joo (Ellen) Cheon, PhD, found that the 10-gene biomarker panel may identify the aggressiveness of a patient’s disease, help predict survival outcomes and result in novel therapeutic strategies tailored to patients with the most adverse survival outcomes. When a patient’s tumor is identified as having elevated levels of these 10 specific genes, doctors may be able to better predict which treatments would be most effective, said Cheon, whose research was published in Clinical Cancer Research. That is an important advance because ovarian cancer is the most lethal gynecologic cancer and is often diagnosed in later, more aggressive stages, resulting in poor prognosis and survival. These outcomes differ due to development of tumors that become resistant to chemotherapy. …

Clinical waste may be valuable for monitoring treatment response in ovarian cancer

"We were able to demonstrate that simply squirting small amounts of otherwise discarded ascites fluid into our device allowed us to quantify tumor cells and explore mechanistic markers of tumor progression without the need to process liters of ascites with advanced instrumentation not readily available in many community hospitals," says Cesar Castro, MD, MMSc, MGH Cancer Center and Center for Systems Biology, co-lead author of the PNAS paper. "Moreover, achieving point-of-care readouts of tumor cell markers from repeatedly collected ascites at different time points, could allow for frequent monitoring of treatment response without having to wait for the next imaging scan." The ability to reliably track treatment response essentially lets caregivers know whether a particular anticancer drug should be continued or if another option should be tried. Tumor recurrence begins before metastases become visible on imaging studies, so several options for non-invasive "liquid biopsies" are being investigated, including analysis of circulating tumor cells and other factors found in the blood. Since ovarian cancer metastases are usually confined to the abdominal cavity and ascites commonly form in advanced disease, the research team theorized that ascites fluid could be an alternative, if not better, option than blood for treatment monitoring. …

Drug induces morphologic, molecular, clinical remissions in myelofibrosis

"These are early results but they are promising, says the study’s lead author, Ayalew Tefferi, M.D. a hematologist at Mayo Clinic. "Some patients in our clinical trial taking imetelstat obtained dramatic responses and there have been some complete responses which is almost unheard of for drug therapy in this disease." Myelofibrosis is a chronic myeloid cancer in which bone marrow cells that produce blood cells develop and function abnormally. The result is the formation of scar tissue in the bone marrow (fibrosis), severe anemia that often requires transfusion, weakness, fatigue and an enlarged spleen and liver…

Biomedical scientist discovers method to increase survival in sepsis

A new study conducted by Jamey Marth, director of UC Santa Barbara’s Center for Nanomedicine and professor of the Sanford-Burnham Medical Research Institute, reports a new method to increase survival in sepsis. The results appear today in the Proceedings of the National Academy of Sciences. Building on earlier work in which Marth’s team revealed the biological purpose of the Ashwell-Morell receptor (AMR) in the liver, the new discovery not only describes the AMR’s protective mechanism, but also outlines a way to leverage it for therapeutic use…