MedicalResearch.com Interview with:
Steven J. Frank, M.D., associate professor of Radiation Oncology at The University of Texas MD Anderson Proton Therapy Center discusses the findings of his latest study, “Gastrostomy Tubes Decrease by Over 50% with Intensity Modulated Proton Therapy during the Treatment of Oropharyngeal Cancer Patients.”
MedicalResearch.com: What are the main findings of the study?
Dr. Frank: The study found that the use of feeding tubes in oropharyngeal carcinoma (OPC) cancer patients treated with intensity modulated proton therapy (IMPT) decreased by more than 50% percent compared to patients treated with intensity modulated radiation therapy (IMRT). This suggests that proton therapy may offer vital quality of life benefits for patients with tumors occurring at the back of the throat.
Of the 50 OPC patients enrolled in the study:
MedicalResearch.com Interview with: Dr. Peter Mazzone MD, MPH Pulmonary, Allergy and Critical Care Medicine Cleveland Clinic Main Campus Cleveland, OH 44195 MedicalResearch.com: What are the...
MedicalResearch.com Interview with:
Jeffrey Weber, M.D, Ph.D.
Senior Researcher, Moffitt Cancer Center
Tampa, Florida
MedicalResearch.com: What are the main findings of the study?
Dr. Weber: That the PD-1 blocking antibody nivolumab has a 25% ORR with long duration of response in ipilimumab refractory patients, and that patients with prior grade 3-4 ipilimumab related immune related side effects may be safely treated with nivolumab without reproducing the prior IPI related side effects.
MedicalResearch.com:
Prof. Dr. Gunnar Brix
Division of Medical and Occupational Radiation Protection
Federal Office for Radiation Protection
Institut für Med. Strahlenhygiene
85764 Neuherberg
MedicalResearch.com: What are the main findings of the study?
Answer: We investigated the cumulative radiation exposure and cancer risk of more than 1200 patients with ischemic heart diseases (IHD) from diagnostic and therapeutic imaging procedures performed 3 month before and 12 month after the date of diagnosis. The major findings were:
MedicalResearch.com Interview with:
David Goldenberg MD, FACS
Professor of Surgery and Oncology
Director of Head and Neck Surgery
Associate Director of Surgical Services- Penn State Hershey Cancer Institute
Division of Otolaryngology-Head and Neck Surgery
The Pennsylvania State UniversityThe Milton S. Hershey Medical Center, Hershey, PA 17033
MedicalResearch.com: What are the main findings of this study?
Dr. Goldenberg: The incidence of thyroid cancer is on the rise and has nearly tripled in the last thirty years.
Some authors have attributed this increase in incidence to improved sensitivity of diagnostic techniques and imaging allowing for diagnosis of small insignificant thyroid cancers. Others do not agree and state that is a real rise in this disease.
Many patients have their cancer discovered by accident when they undergo a diagnostic study for some other reason- such as trauma, neck pain, or carotid artery studies (for clogged arteries).
We aimed to compare incidentally discovered versus non incidentally discovered thyroid cancers to determine whether the thyroid cancers in both groups harbor different characteristics.
MedicalResearch.com Interview with:
Dr. S. Wassertheil-Smoller PhD
Distinguished University Professor Emerita
Department of Epidemiology & Population Health
Principal Investigator, Women's Health Initiative
Albert Einstein College of Medicine |
1300 Morris Park Avenue Bronx, NY 10461
MedicalResearch.com: What are the main findings of the study?
Answer: We studied 7728 older women who developed invasive breast cancer during their participation in the Women’s Health Initiative, known as WHI. This study found that women with invasive breast cancer who are users of multivitamin and mineral supplements had a 30% lower risk of dying from their breast cancer compared to non-users. This protective effect was observed to be independent of a large number of factors which affect breast cancer outcomes and which account for differences between users and non-users. The women we studied were ages 50-79 when they started the WHI.
MedicalResearch.com Interview with: Hiroko Masuda MD
Morgan Welch Inflammatory Breast Cancer Research Program and Clinic; Departments of 2Breast Medical Oncology, 3Bioinformatics and Computational Biology The University of Texas MD Anderson Cancer Center, Houston, Texas;
W. Fraser Symmans, MD Anderson Cancer Center, Department of Pathology, Unit 85, 1515 Holcombe Blvd., Houston, TX 77030-4009;
Naoto T. Ueno, MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1354, Houston, TX 77030.
MedicalResearch.com: What are the main findings of the study?
Answer: Triple-negative breast cancer (TNBC) could be classified into 7 subtypes: basal-like 1 (BL1), basal-like 2 (BL2), immunomodulatory (IM), mesenchymal (M),mesenchymal stem-like (MSL), luminal androgen receptor (LAR), and unstable (UNS). Using cluster analysis, Lehmann and Bauer et al. identified these TNBC subtypes in 21 public mRNA gene expression profiles of breast cancer. However, the clinical relevancy of these novel molecular subtypes has not been established. To establish the clinical relevancy, we determined if the subtypes of TNBC have different rates of pathological complete response (pCR) to standard neoadjuvant chemotherapy regimens. In this study, we confirmed that TNBC is heterogeneous and that pCR differs by TNBC subtype using the algorithm proposed by Lehmann and Bauer et al. The BL1 subtype had the highest pCR rate (52%), and BL2 and LAR had the lowest pCR rates (0% and 10%, respectively). TNBC subtype was an independent predictor of pCR status (P=0.022) via a likelihood ratio test. To our knowledge, this was the first study to show that the TNBC subtype can serve as an independent predictor of pCR status in patients who received standard chemotherapy regimens. This confirms the possible clinical relevance of the 7 molecular subtypes, and these subtypes may lead to innovative clinical trials of personalized medicine for patients with TNBC.
MedicalResearch.com Interview with
Susan Halabi, PhD
Duke University Medical Center
Durham, NC 27710
MedicalResearch.com: What are the main findings of the study?
Dr. Halabi: The purpose of assessing surrogate endpoints is to allow for a more rapid and efficient determination of whether a given therapy provides clinical benefit to patients by prolonging their life.
We sought to evaluate PSA kinetics as surrogate endpoints for overall survival (OS) in mCRPC patients who were receiving second line chemotherapy (cabazitaxel or mitoxantrone) following progression after docetaxel. Using different analytical approaches, we found that PSA declines within the first three months of treatment are not appropriate as surrogate markers of clinical benefit in men who were receiving second line chemotherapy.
This analysis has important clinical care and study design implications: it has become common to use ≥30% decline in PSA as a clinical trial endpoint for all patients with metastatic CRPC, based on the original front-line docetaxel data. The data presented in this study suggest that this is erroneous. Further we believe these data are important because they demonstrate that there are different disease states within the group of patients with “metastatic CRPC". To make the assumption that the same surrogate endpoint can be used across the board may seem like an obvious mistake, but permeates the literature.
MedicalResearch.com Interview with:
Dr. Elisabeth Jeppesen MPH, PhD-fellow
National Resource Center for Late Effects after Cancer Treatment, Department of Oncology, Oslo University, Hospital, The Norwegian Radiumhospitalet, Oslo, Norway
mobil +47 951 05271
Wisit: Ullernchaussen 70 (Radiumhospitalet)
www.oslo-universitetssykehus.no
MedicalResearch.com: What is the background of this study?
Answer: Each year a considerable number of parents with children younger than 18 years of age are affected by cancer in a parent. Cancer in one of the parents might represent a potentially traumatic event and thereby may be a risk factor for psychosocial problems in the offspring. So far, teenagers’ psychosocial responses to parental cancer have only been studied to a limited extent in controlled trials. Using a trauma theory perspective many studies have shown significant direct associations between parental cancer and psychosocial problems in teenagers. However, the literature also indicates that most children and teenagers have normal stress reactions to such events. In order to identify the need for eventual prevention and intervention among teenagers exposed to such a stressor, we need more empirical knowledge of their psychosocial situation.
MedicalResearch.com Interview with:
Anil K. Sood MD
Department of Gynecologic Oncology
The University of Texas MD Anderson Cancer Center
Unit 1362, PO Box 301439, Houston, TX, 77030
MedicalResearch.com: What are the main findings of the study?
Dr. Sood: For women with newly diagnosed ovarian cancer, high heart rate at diagnosis (tachycardia), venous thromboembolism (VTE) occurring after diagnosis and pulmonary hypertension post-diagnosis are independently related to reduced survival after controlling for tumor stage, grade, and extent of cytoreduction. Women with tachycardia lived an average of 4.0 years after diagnosis compared with 5.9 years for women without tachycardia, a 32% reduction in duration of survival. Patients who experienced VTE lived a median 4.1 years after diagnosis, compared with 6.4 yrs for patients who did not experience VTE.
MedicalResearch.com Interview with:
Kelly K. Hunt, MD F.A.C.S.
Professor, Department of Surgical Oncology, Division of Surgery
Chief, Breast Surgical Oncology Section, Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
MedicalResearch.com: What are the main findings of the study?
Dr. Hunt: We found that 40% of women who had node positive disease at initial presentation (confirmed by needle biopsy) had no evidence of residual cancer in the lymph nodes after chemotherapy.
We performed sentinel lymph node (SLN) surgery followed by axillary lymph node dissection in all of the patients and found a false negative rate of 12.6% with the SLN procedure.
The false negative rate was lower when surgeons used two mapping agents (blue dye and radioisotope) to identify the sentinel nodes and when they removed more than 2 sentinel nodes.
Dr. Atul Butte, MD, PhD
and
Julien Sage PhD
Departments of Pediatrics and Genetics
Department of Internal Medicine, University of California Davis Cancer Center
University of California Davis School of Medicine
Sacramento, California
MedicalResearch.com: What are the main findings of the study?
Answer: A major finding of the study is the identification of first-generation anti-depressants as possible drugs effective against a lethal subtype of lung cancer, small cell lung cancer.
A second important aspect of this work is the use of a bioinformatics-based drug repositioning pipeline developed by the Butte lab, which allowed us, when combined with advanced mouse models of lung cancer developed by the Sage lab, to identify a novel targeted therapy against SCLC and initiate a clinical trial in less than 2 years.
MedicalResearch.com Interview with:
Robert G Bristow MD, PhD, FRCPC
Clinician-Scientist, Ontario Cancer Institute/Princess Margaret Cancer Centre
Professor, Depts. of Radiation Oncology and Medical Biophysics, University of Toronto
Director, Core I - STTARR Innovation Facility
Canadian Cancer Society Research Scientist
http://www.uhnres.utoronto.ca/researchers/profile.php?lookup=645
MedicalResearch.com: What are the main findings of the study?
Dr. Bristow: We studied the more than 7 years of outcome of close to 250 patients with localized (intermediate risk) prostate cancer that received precision radiotherapy or surgery for cure. We found that up to one third of these patients fail initial radiotherapy or prostate surgery.
By using a patient’s initial diagnostic core biopsy, we studied the DNA fingerprints of the tumors. We noticed a pattern in which the patients that had failed treatment had abnormal levels of breaks at sites within the chromosomes that are sensitive to DNA damage called, “common fragile sites” (CFS).
These CFS break abnormalities have been linked to cancer in general and usually are associated with instability of the cell’s DNA-a phenomenon that is particularly associated with cancer.
So patients who have unstable chromosomes are more likely to fail precision radiotherapy or surgery.
MedicalResearch.com Interview with:
Niyati Parekh, PhD, RD
Assistant Professor of Nutrition and Public Health,
Director of Doctoral Program in Clinical Nutrition,
Department of Nutrition, Food Studies and Public Health, Steinhardt School and
Department of Population Health, NYU Langone School of Medicine, New York University
411 Lafayette Street NY. NY-10003.
MedicalResearch.com: What are the main findings of the study?
Dr. Parekh: The objective of the study was to investigate disturbances in blood glucose levels in relation to risk of obesity-related cancers. We observed an increased risk of obesity-related cancers, specifically colon cancer among persons with abnormal glucose values. These findings were stronger among persons who had this abnormality for longer duration (>10years).
MedicalResearch.com Interview with
Dr. Ethan Basch MD
Memorial Sloan-Kettering Cancer Center
MedicalResearch.com: What are the main findings of the study?
Dr. Basch: The primary clinical finding of this study is that treatment with abiraterone acetate delays the time until pain develops or worsens in men with advanced prostate cancer. Furthermore, abiraterone delays the time until quality of life and functioning deteriorate, compared to placebo. There is also a broader research finding of this study, which is that it is feasible to rigorously study the time until symptom progression in cancer clinical trials, which paves the way for future studies to use a similar approach.
MedicalResearch.com Interview with:
Prof Aron Goldhirsch
Department of Medicine
European Institute of Oncology
Via Ripamonti 435, 20141 Milan, Italy
MedicalResearch.com: What are the main findings of the study?
Prof. Goldhirsch: Two years of adjuvant trastuzumab after standard chemotherapy is not more effective than is 1 year of treatment with the drug for patients with HER2-positive early breast cancer.
MedicalResearch.com Interview with:
Prof John R Yarnold
Division of Radiotherapy and Imaging
The Royal Marsden NHS Foundation Trust
Sutton, Surrey SM2 5PT, UK
MedicalResearch.com: What are the main findings of the study?
Prof. Yarnold: A 3-week schedule of curative post-operative radiotherapy for women with breast cancer involving 15 treatments (fractions) delivered Monday to Friday each week, is at least as safe and effective as historical schedules given over 5 or 6 weeks. In fact the 3-week schedule is gentler on the healthy tissues than earlier standard regimens.
MedicalResearch.com Interview with:
Aasma Shaukat, M.D., M.P.H.
Dept. of Medicine
GI Division, MMC 36
University of Minnesota
Minneapolis, MN 55455
MedicalResearch.com: What are the main findings of the study?
Dr. Shaukat: The study showed that screening for colon cancer using stool cards
consistently reduces risk of death from colon cancer by one-third through
thirty years. The benefit of screening in larger in men compared to women,
and for women the benefit seems to start at age 60. However, screening did
not make people live longer.
MedicalResearch.com Interview with:
Ze'ev Ronai, Ph.D.
Professor and scientific director of Sanford-Burnham Medical Research Institute La Jolla San Diego, Calif.
MedicalResearch.com: What are the main findings of the study?
Answer: This study provides the first direct evidence of the importance of the PDK1 enzyme in the development of melanoma and in the metastasis of this aggressive tumor type. We demonstrate, with a genetic mouse melanoma model (harboring the Braf/Pten mutations commonly seen in human melanomas) and/or pharmacological inhibitors against PDK1, that melanoma requires this enzyme for its development, and more so – for its ability to metastasize. Since PDK1 is key kinase that regulates a number of protein kinases, which are currently being assessed in clinical trials (including AKT), our finding points to a new set of targets that could be more amenable for effective combination therapy in melanoma.
MedicalResearch.com Interview with:
Nariya Cho, MD
Departments of Radiology
Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
MedicalResearch.com: What are the main findings of the study?
Dr. Cho: Smaller reduction in tumor volume and a smaller reduction in washout component on dynamic contrast agent–enhanced MR imaging assessed by computer-aided evaluation after neoadjuvant chemotherapy were independent parameters of worse recurrence-free survival and overall survival in breast cancer patients who received neoadjuvant chemotherapy.
MedicalResearch.com Interview with:
David F Jarrard, MD
Vice Chair for Clinical Affairs
Professor of Urology
John Livesey Chair in Urologic Oncology
MedicalResearch.com: What are the main findings of the study?
Dr. Jarrard: We have developed and externally validated an accurate nomogram for predicting Gleason score 6 upgrading for use in low-risk prostate cancer patients. This nomogram incorporates only variables available at the time of diagnosis and is unique in its assessment of clinical as well as pathological factors. Furthermore, we externally validated this study in patients with Gleason 6 prostate cancer of which 90% met the D’Amico criteria for low-risk cancer at 2 other centers (total 2000 patients). This nomogram will aid in the decision-making process of patients diagnosed with low-risk prostate cancer.
MedicalResearch.com Interview with:
Joel H. Rubenstein, MD, MSc, FACG, FASGE
Research Scientist, Veterans Affairs Center for Clinical Management Research
Assistant Professor, Division of Gastroenterology, University of Michigan Medical School
VA Medical Center Ann Arbor, MI 48105
MedicalResearch.com: What are the main findings of the study?
Dr. Rubenstein: In a set of case-control studies within the same population, we found that H. pylori was inversely associated with erosive esophagitis, and with Barrett’s esophagus, but we did not find such a relation with symptoms of gastroesophageal reflux disease (GERD).
Dr. Bettina Scholtka
Universität Potsdam
Institut für Ernährungswissenschaft
Abt. Ernährungstoxikologie
Arthur-Scheunert-Allee 114-116
14558 Nuthetal, Germany.
MedicalResearch.com: What are the main findings of the study?
Answer: The extremely high sensitivity of the WTB-HRM technique allows to find
very low amounts of different types of colon cancer initiating gene
mutations even in stool samples of patients. The method is able to
find the expected mutations as well as unknown mutations. So, by
applying WTB-HRM to a panel of especially selected marker genes, it is
possible to detect cancer precursors in feces before they progress
into a malignant stage.