Author Interviews, Diabetes, PNAS / 07.06.2014

Wouter De Haes Functional Genomics and Proteomics (Schoofs lab) Zoological Institute Leuven BelgiumMedicalResearch.com Interview with: Wouter De Haes Functional Genomics and Proteomics (Schoofs lab) Zoological Institute Leuven Belgium MedicalResearch: What are the main findings of the study? Answer: We discovered that the lifespan-extending effect of metformin is dependent on the increased production of reactive oxygen species in the roundworm Caenorhabditis elegans. Antioxidants, compounds that remove these reactive oxygen species, abolished the lifespan-extending effect of metformin, adding to the growing body of evidence that anti-oxidants are not as beneficial for health as generally assumed. We also identified the protein, belonging to the group of peroxiredoxins, that seems responsible for translating this increase in reactive oxygen species production into longevity. (more…)
Dermatology, PNAS, Weight Research / 02.04.2014

Professor Rodney Sinclair University of Melbourne and Epworth Hospital Melbourne, VIC, AustraliaMedicalResearch.com Interview with: Professor Rodney Sinclair University of Melbourne and Epworth Hospital Melbourne, VIC, Australia   MedicalResearch.com: What are the main findings of the study? Answer: Activation of Wnt signalling promoted hair growth and fat growth.  Inhibition of Wnt signalling reduces fat growth and hair growth.  We looked at the fat layer on the scalp.  It was reduced by 50% over the bald areas of alopecia areata.  The patch of alopecia areata we looked at was new- only appeared a few days earlier and so the changes in fat thickness are rapid. What is interesting is that the fat layer is dynamic, and significant fluctuations can occur in a rapid period of time in sync with the hair cycle.  It is also interesting that ligands for BMP6 and IGF2 are pro-adipogenic. There are a couple of bigger questions that earlier media reports did not focus on- namely upstream factors regulating the hair cycle clock and the beauty of synchronization of fat and hair growth for seasonal thermal insulation. (more…)
Alzheimer's - Dementia, Author Interviews, PNAS, University of Michigan / 19.03.2014

Yanzhuang Wang, PhD Associate professor Dept. of Molecular, Cellular and Developmental Biology and Dept. of Neurology University of Michigan Ann Arbor, MI 48109-1048MedicalResearch.com Interview with: Yanzhuang Wang, PhD Associate professor Dept. of Molecular, Cellular and Developmental Biology and Dept. of Neurology University of Michigan Ann Arbor, MI 48109-1048  MedicalResearch.com: What are the main findings of the study? Dr. Wang: We learned how to repair a cellular structure called the Golgi apparatus that is broken in Alzheimer’s disease. This helps us understand how to reduce the formation of the toxic plaques that kill cells in the brain of Alzheimer's patients. The formation of amyloid plaques is a hallmark of Alzheimer’s disease; but exactly how much the plaques contribute to the disease is still not known. Our study found that the broken Golgi in the disease may be a major source of the toxicity of amyloid plaques. We showed in this study that repairing the Golgi can reduce the formation of the toxic plaques and thus may delay the disease development. (more…)
Author Interviews, Endocrinology, Menopause, PNAS, Stanford / 28.11.2013

Dr. Victor W. Henderson MD Professor of Health Research and Policy and of Neurology and Neurological Sciences Stanford University, Stanford, CA 94305MedicalResearch.com Interview with: Dr. Victor W. Henderson MD Professor of Health Research and Policy and of Neurology and Neurological Sciences Stanford University, Stanford, CA 94305 MedicalResearch.com: What are the main findings of the study? Dr. Henderson: Estrogen or hormone therapy effects on some health outcomes differ by age, harmful at one age and beneficial at another. This difference is sometimes referred to as the “critical window” or “timing” theory. It is controversial whether the so-called critical-window applies to memory or other cognitive skills. In assessing the critical window hypothesis, we found that the relation between blood levels of estrogen and memory or reasoning skills is the same in younger postmenopausal women as in older postmenopausal women.  Essentially, there is no association at either age. (more…)
Author Interviews, Cognitive Issues, PNAS / 02.10.2013

Agnieszka Anna Tymula Lecturer (Assistant Professor) School of Economics The University of Sydney NSW 2006, AustraliaMedicalResearch.com Interview with: Agnieszka Anna Tymula Lecturer (Assistant Professor) School of Economics The University of Sydney NSW 2006, Australia MedicalResearch.com: What are the main findings of the study? Answer: We found that individual risk preferences as well as consistency and rationality in choice change with age. Just like cognitive abilities, the ability to make consistent and rational decisions considerably declines in older adulthood. Tolerance to risk in the domain of gains follows an inverted U-shaped pattern along the life span, with older adults (65+ y. o.) and adolescents being more risk averse than young or midlife adults. Interestingly, in the domain of losses, older adults are willing to accept significantly more risks than adolescents, young and midlife adults. (more…)
Author Interviews, Gastrointestinal Disease, PNAS, University of Pennsylvania / 08.08.2013

MedicalResearch.com Interview with Frederic D. Bushman, Ph.D. Professor, Department of Microbiology Department of Microbiology Perelman School of Medicine University of Pennsylvania 426A Johnson Pavilion 3610 Hamilton Walk Philadelphia, PA 19104MedicalResearch.com Interview with Frederic D. Bushman, Ph.D. Professor, Department of Microbiology Department of Microbiology Perelman School of Medicine University of Pennsylvania 426A Johnson Pavilion 3610 Hamilton Walk Philadelphia, PA 19104   MedicalResearch.com: What are the main findings of the study? Dr. Bushman: Viral populations in the human gut are huge, and some of the viruses change rapidly over time. (more…)
Author Interviews, Breast Cancer, Genetic Research, PNAS / 03.04.2013

MedicalResearch.com eInterview with Dr. Mathieu Lupien PhD Dr. Mathieu Lupien PhD Princess Margaret Cancer Centre, University Health Network Ontario Cancer Institute (OCI) Assistant Professor Department of Medical Biophysics University of Toronto Princess Margaret Cancer Centre, University Health Network Ontario Cancer Institute (OCI) Assistant Professor Department of Medical Biophysics University of Toronto MedicalResearch.com: What are the main findings of the study? Dr. Lupien: Approximately 50% of breast cancer patients fail to respond to the standard of care based on endocrine (hormonal) therapy. Our research identifies a mechanism that accounts for this resistance. Drugs against this mechanism are already tested for other diseases. Hence, our discovery should rapidly help reposition these drugs against endocrine therapy resistant breast cancer. (more…)
Author Interviews, Memory, Mental Health Research, PNAS / 02.04.2013

Karl K. Szpunar PhD Department of Psychology, Harvard University, Cambridge, MA 02138MedicalResearch.com Interview with Karl K. Szpunar PhD Department of Psychology, Harvard University, Cambridge, MA 02138 MedicalResearch.com:   What are the main findings of the study? Dr. Szpunar: The results of our experiments demonstrate that students can have difficulty paying attention to online lectures, and that including brief quizzes during lectures can help to alleviate this problem. Specifically, we found that students who were tested throughout a 21-minute long Statistics lecture were half as likely to mind wander during the lecture, three times as likely to take additional notes, and much better able to retain the contents of the lecture at a later time. (more…)
Author Interviews, Cancer Research, PNAS / 02.04.2013

MedicalResearch.com Author Interview: Prof. Eytan Domany Department of Physics of Complex Systems and Department of Biological Regulation, Weizmann Institute of Science, Rehovot, 76100, IsraelDepartment of Physics of Complex Systems and Department of Biological Regulation, Weizmann Institute of Science, Rehovot, 76100, Israel MedicalResearch.com: What are the main findings of the study? Prof. Domany: The findings are two-fold: methodological and clinical.  A novel method was introduced for personalized analysis of cancer, and was applied on large colon cancer and glioblastoma datasets. The method uses high throughput (gene expression) data to infer a pathway deregulation score (PDS) for individual tumors, for hundreds of pathways and biological processes. The method is knowledge-based in that it uses well known information about the assignment of genes to biologically relevant pathways. No detailed knowledge of the underlying networks of interactions and activations is necessary. Each tumor is represented by a few hundred of these PDSs, and further analysis uses this representation. (more…)