Tag Archives: professor

Ceratin gene mutations make breast cancers treatment-resistant

Treatment given to shrink or eliminate a tumor before surgery is called neoadjuvant therapy. In some women with breast cancer treated with neoadjuvant therapy, no residual invasive cancer can be detected in breast tissue samples and lymph nodes removed during surgery. Emerging data suggest that these women, who are said to have had a pathologic complete response, have a greater chance of long-term survival compared with women who do not have a pathologic complete response. "Mutations in the PIK3CA gene are among the most common genetic aberrations in breast cancer," said Sibylle Loibl, M.D., professor at the German Breast Group in Neu-Isenburg, Germany. …

Changing chemo not beneficial for metastatic breast cancer patients with elevated circulating tumor cells

"We concluded that CTCs are not a good marker in helping to decide when to switch between chemotherapies," said Jeffrey B. Smerage, M.D., Ph.D., clinical associate professor at the University of Michigan Comprehensive Cancer Center in Ann Arbor. "It had been hoped that switching would both increase the chances of being on an effective therapy and decrease the exposure to toxicity from less effective or ineffective therapies, and as a result it had been hoped that this early switching would result in improved survival and time to progression. "The most important implication is that we have validated that the group of patients with elevated CTCs at both baseline and 21 days [after starting their first chemotherapy] has a worse prognosis with regard to both time to progression and overall survival," added Smerage…

Zebrafish help decode link between calcium deficiency, colon cancer

By studying zebrafish embryo skin, University of Michigan researchers decoded cell messages underlying abnormal colonic cell growth of the kind that can lead to tumors and colon cancer in calcium deficient individuals. They have also tested this new mechanism in human colon cancer cells. Ultimately, the new biological mechanism unraveled in zebrafish will help scientists understand the pathways that fuel low calcium-related abnormal colonic cell growth and how to stop that growth, said Cunming Duan, professor in the U-M Department of Molecular, Cellular & Developmental Biology. To do this, Duan and colleagues used a fluorescent protein to mark a type of epithelial cell, whose job it is to import calcium into the body. …

Childhood cancer survivors suffer long-term symptoms linked to poor quality of life

"The prevalence of these symptoms accounts for a huge variance in physical, mental and social domains of quality of life among survivors," said I-Chan Huang, Ph.D., an associate professor of health outcomes and policy in the UF College of Medicine and the lead author of the study. "If we think symptoms are the key to patients’ quality of life, then if we can better manage their symptoms, we can improve their daily functional status and quality of life." Huang, also a member of UF’s Institute for Child Health Policy, teamed with researchers from St. Jude Children’s Research Hospital in Memphis to conduct the study, which was published in the Nov. 20 issue of the Journal of Clinical Oncology…

First step of metastasis halted in mice with breast cancer

"Metastasis is what most threatens breast cancer patients, and we have found a way to stop the first part of the process in mice," says Andrew Ewald, Ph.D., assistant professor of cell biology at the Johns Hopkins School of Medicine. Before metastasis occurs, single cells on the edge of a tumor, termed leader cells, form protrusions into the surrounding tissue, like someone dipping a toe in to test the water before deciding to venture farther, Ewald says. If the conditions are right, the leader cells act as guides, with many tumor cells following behind, as they escape the confines of the tumor into the healthy tissue beyond. Full metastasis occurs when the cells succeed in migrating to a new location — the lungs, for example — and set up shop, creating a new tumor…

Personalizing cancer treatments for youngest patients

Precision medicine constitutes a different method of identifying best treatment options for patients. Instead of prescribing therapy based solely on the organ where the cancer originated, clinicians utilize genomic analysis for a more comprehensive approach. Through a rapid gene sequencing test, the tiniest details of a tumor biopsy are uncovered, sometimes revealing one or more mutations in the patient’s genes. It is the mutations themselves that can be targeted with new or existing drugs. …

Biomarker linked to aggressive breast cancers, poor outcomes in African-Americans

"Our data indicate that HSET represents a potential new biomarker for poor breast cancer outcome among African-American women with the disease," said Ritu Aneja, Ph.D., associate professor in the Department of Biology at Georgia State University in Atlanta. "Using this biomarker effectively could give oncologists critical new information and potentially save lives by allowing earlier recognition of more aggressive breast cancers in African-American women, with the subsequent use of more customized treatment regimens to better manage disease." African-American women are often diagnosed with breast cancer at a younger age than non-Hispanic white women and are more likely to have cancers that spread, recur, or result in death. Identification of biomarkers that can help clinicians predict if African-American women will have aggressive cancer is a high priority, according to Aneja. …

Potential biological factor contributing to racial disparities in prostate cancer

In the United States, African-American men are 1.5 times more likely to develop prostate cancer and more than twice as likely to die from the disease compared with non-Hispanic white men. "The causes of prostate cancer disparities are numerous, complex, often interrelated, and only partially understood," said David P. …