Feb. 18, 2015
Feb. 11, 2015
Heart disease is the leading cause of death in the United States. A new study published in the American Journal of Transplantation titled "National decline in donor heart utilization with regional variability: 1995-2010” has found that while the need for heart transplants is rising, a growing number of surgeons and transplant centers are increasingly rejecting donor hearts. National trends in donor heart acceptance for transplantation were studied by analyzing data from the Organ Procurement and Transplantation Network for all potential adult cardiac organ donors between 1995 and 2010. There was a significant decrease in donor heart acceptance.
The analysis also demonstrated regional variability, showing some regions using a relatively higher proportion of donor hearts than others. This suggests that donor heart acceptance practices are not standardized and indicates a need for clinical guidelines for donor heart acceptance, along with more intense efforts to increase the use of donor hearts in areas with relatively low utilization rates. "Over time heart transplant doctors have gotten pickier about the hearts they transplant but there has been little concordant evidence that this has improved transplant recipient outcomes. Instead the result has been a larger waitlist with longer waiting times," said Ben Goldstein, a senior author of the study.
There are currently no standardized, evidence-based donor heart acceptance guidelines in the US. The study concludes that a more systematic manner of evaluating hearts based on scientific evidence could help increase the number of heart transplants performed. Click here to read more.
Feb. 4, 2015
It has long been accepted that there are four enzymes, called hexokinases, that kick-start the body’s process of metabolizing sugar and getting energy from food. But according to ground breaking research by scientists at Duke and Northwestern universities, the hexokinase team actually has a fifth player. “This swims against the past 40 years of research and what we thought we knew, hexokinases are critical to basically all of our energy production. Finding a fifth one opens the door to more study into how we metabolize sugar, as well as genetic links to metabolic disorders.” said Tim Reddy, Ph.D., a senior author of the study.
The new protein is called HKDC1, and the researchers report that this enzyme may be a genetic predictor for whether an expectant mother develops hyperglycemia during pregnancy. Hyperglycemia is a potentially harmful environment for a growing fetus and can contribute to obesity and diabetes later in the child’s life. Researchers hope the new findings could lead to a test for pregnant women that indicates their potential for developing hyperglycemia. “The discovery of this gene creates a path forward to better predicting a woman’s risk,” Reddy said. “Knowing that there is this new hexokinase at play could also give us more information on how to inhibit or activate it, and anything we can to do disrupt the cycle would be an important advance to stem the epidemic of diabetes we see today.”
The findings appear in the online journal Nature Communications. Click here to read more.
This week, Circulation published an article “Hyperlipidemia in Early Adulthood Increases Long-Term Risk of Coronary Heart Disease” that is getting wide circulation in the print, radio and online media. The article is based on research that suggests that even moderate elevation of cholesterol levels in adults between the ages of 35 and 55 can have long-term impact on their heart health, with every decade of high cholesterol increasing their chances of heart disease by 39 percent. The study, conducted by colleagues at Duke, Boston University and McGill University examined data on 1,478 adults who were free of heart disease at age 55 who were part of the Framingham Heart Study, which began in 1948. "Few, if any, studies have gathered the quality of the cardiovascular data that the Framingham study has," said biostatistician Michael Pencina, Ph.D., a senior author of the paper. "That wealth of data collected over time made it possible to analyze the long-term effects of cholesterol in young people -- a topic on which not enough is known because it requires decades of tracking."Researchers calculated the length of time each participant had high cholesterol by age 55 and they were followed for up to 20 years to see how cholesterol levels affected their risk of heart disease. “Dr. Robert Eckel, past president of the American Heart Association, said if these new results are confirmed in future studies, it could influence guidelines on the use of cholesterol-lowering statin drugs.” Click here to read more.
On September 30, 2014, more than 150 participants, including employees of GSK, members of the Duke Department of Biostatistics and Bioinformatics and Master’s and PhD biostatistics students from Duke, attended the second Joint GSK-Duke Workshop on Critical Statistical Issues for Drug Development, held at Duke in the Hock Plaza building, the home of the Duke Department of Biostatistics and Bioinformatics. For more information, please see our News and Updates Section.
Shuyen Ho (GSK), Margaret Polinkovsky (GSK), Sara Hughes (VP and Head, Clinical Statistics of GSK), Greg Campbell (Director, Division of Biostatistics, Center for Devices and Radiological Health, Food and Drug Administration) Liz DeLong (Chair, Duke Department of Biostatistics and Bioinformatics), Shein-Chung Chow (Duke), Xiaofei Wang (Duke)
July 28, 2014
Dr. DeLong and Dr. Chow were invited by Dr. Junzhi Wang, Deputy Director-General of National Institutes for Food and Drug Control (NIFDC) of China Food and Drug Administration (CFDA) to sign an MOU on biostatistics and bioinformatics collaboration between Duke B&B and ICDC (Institute for Chemical Drug Control) of NIFDC in Beijing, China. The MOU was signed by Dr. DeLong (Duke B&B) and Dr. Huaxin Yang (ICDC of NIFDC) under supervision of Dr. Junzhi Wang followed by group photo and seminars by Dr. DeLong. She spoke on the expanding role of biostatistics at Duke and Dr. Chow spoke on Good Statistics Practices in non-clinical drug research and development).
Dr. Dejiang Tan (Deputy Director of ICDC) and Dr. Chow have been identified as the primary contact people for this collaboration. Both of them will identify topics and research areas of common interest in pharmaceutical research and development and circulate within B&B and colleagues in NIFDC in the near future. The collaboration between Duke B&B and ICDC/NIFDC will provide the opportunity for our faculty to participate joint research with scientists and principal investigators at ICDC/NIFDC in pharmaceutical research and development.
July 7, 2014
Susan Halabi was elected as a Fellow for the Society of Clinical Trials, Class of 2014. The award is given as a recognition for outstanding professional contributions to the scientific community and leadership in clinical trials. The citation read at the Annual Meeting: "For her outstanding leadership in cancer clinical trials and prognostic development, particularly her work in the Cancer and Leukemia Group B, now part of the Alliance for Clinical Trial in Oncology, that focused on genitourinary cancers in which she designed and analyzed dozens of clinical trials that have informed new treatment approaches for prostate cancer and other GU malingnancies, identified important associations between biological factors and treatment outcomes and impacted the quality of life of cancer patients; for her educational activities; and for dedicated service on national review committees, DSMBs and scientific advisory committees and for the Society of Clinical Trials."
July 1, 2014
A new compilation of the world's most cited scientists released by Thomson Reuters, includes Biostat faculty member Michael Pencina along with 31 other Duke researchers. The list includes 3215 most-cited scientists who are in the top one pecent of their fields. Most-cited means a paper has been named frequently in references by other papers in that field. And that "is a measure of gross influence that often correlates well with community perceptions of research leaders within a field," Thomson Reuters says. The Thomson Reuters analysis is based on their Web of Science database.