Author Interviews, Cancer Research, Technology / 04.09.2016
Scientists Develop Nanocarrier To Deliver Personalized Cocktail of Medications Directly to Tumor
MedicalResearch.com Interview with:
[caption id="attachment_27640" align="alignleft" width="125"]
Dr. Adam Alani[/caption]
Adam G Alani, PhD
Associate Professor of Pharmaceutical Sciences
Department of Pharmaceutical Sciences
College of Pharmacy
Oregon State University-Oregon Health & Science University
Affiliate Assistant Professor
Department of Biomedical Engineering
School of Medicine at Oregon Health & Science University
Oregon State University-Portland Campus at OHSU
Portland Oregon
MedicalResearch.com: What is the background for this study?
Response: Current chemotherapeutic regimens while effective are difficult for patients and affect their quality of life. Our research tackles this issue by designing a nanotherapy that can deliver multiple chemotherapeutic agents by targeting the entire tumor microenvironment and not just the cancer cells and by reducing drug resistance. This, then is intended to simplify the treatment regimen, reduce drug related side effects and extends the life of the drugs by preventing resistance should the patient need it in the future. Thus, the ultimate underlying goal is to improve the patient’s quality of life by not just maximizing the drug’s efficacy but also trying to decrease its impact on the overall lifestyle of the individual.
Dr. Adam Alani[/caption]
Adam G Alani, PhD
Associate Professor of Pharmaceutical Sciences
Department of Pharmaceutical Sciences
College of Pharmacy
Oregon State University-Oregon Health & Science University
Affiliate Assistant Professor
Department of Biomedical Engineering
School of Medicine at Oregon Health & Science University
Oregon State University-Portland Campus at OHSU
Portland Oregon
MedicalResearch.com: What is the background for this study?
Response: Current chemotherapeutic regimens while effective are difficult for patients and affect their quality of life. Our research tackles this issue by designing a nanotherapy that can deliver multiple chemotherapeutic agents by targeting the entire tumor microenvironment and not just the cancer cells and by reducing drug resistance. This, then is intended to simplify the treatment regimen, reduce drug related side effects and extends the life of the drugs by preventing resistance should the patient need it in the future. Thus, the ultimate underlying goal is to improve the patient’s quality of life by not just maximizing the drug’s efficacy but also trying to decrease its impact on the overall lifestyle of the individual.














Lindsay Kohler[/caption]
Lindsay Kohler MPH
Mel and Enid Zuckerman College of Public Health
Tucson, Arizona
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Several studies have reported that following health promotion guidelines for diet, physical activity, and maintenance of a healthy body weight may reduce the risk of getting cancer or dying from cancer. We performed a systematic review to examine the associations between established cancer prevention guidelines for diet and physical activity and cancer outcomes. We found that adhering to cancer prevention guidelines set forth by the American Cancer Society or the World Cancer Research Fund/American Institute for Cancer Research consistently reduced the risk of overall cancer incidence and mortality (10-61%) in the studies included in this review. In addition, higher adherence to the guidelines consistently reduced the risk of breast, colorectal, and endometrial cancers. Adherence to a pattern of healthy behaviors may significantly reduce cancer incidence and mortality.
Dr. Mikhail Kolonin[/caption]
Mikhail Kolonin, PhD, Associate Professor
Director, Center for Metabolic and Degenerative Diseases
Harry E. Bovay, Jr. Distinguished University Chair in Metabolic Disease Research
The Brown Foundation Institute of Molecular Medicine
University of Texas Health Science Center at Houston
Houston, TX 77030
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Epidemiology studies have indicated that in obese patients progression of prostate, breast, colorectal, and other cancers is more aggressive. Adipose (fat) tissue, expanding and undergoing inflammation in obesity, directly fuels tumor growth. Adipose tissue is composed by adipocytes and stromal/vascular cells, which secrete tumor-trophic factors. Previous studies by our group have demonstrated that adipose stromal cells, which support blood vessels and serve as adipocyte progenitors, are recruited by tumors and contribute to cancer progression. Mechanisms underlying stromal cell trafficking from fat tissue to tumors have remained obscure. We discovered that in obesity a chemokine CXCL1, expressed by cancer cells, attracts adipose stromal cells to tumors.
Prof. Frances Balkwill[/caption]
Professor Frances Balkwill OBE, FMedSci
Lead, Centre for Cancer and Inflammation
Barts Cancer Institute
Queen Mary University of London
London
MedicalResearch.com: What is the background for this study?
Prof. Balkwill: We wanted to find out if chemotherapy altered patients immune system especially the immune cells that co-exist with cancer cells in tumors.
We studied women with ovarian cancer who often receive chemotherapy after diagnosis but before surgery. This meant, at least in some of them, we could study a biopsy taken before treatment began and also a biopsy taken during the operation.
Dr. Arjun Balar[/caption]
Dr. Arjun Balar MD
Assistant Professor, Department of Medicine
Co-Leader Genitourinary Cancers Program
NYU Langone Medical Center
Laura and Isaac Perlmutter Cancer Center
MedicalResearch.com: What is the background for this study?
Dr. Balar: Standard treatment for advanced urothelial cancer includes cisplatin chemotherapy. But more than half of patients are not expected to tolerate
it well and alternative treatment is inferior to cisplatin. The average survival for these patients is in the range of 9-10 months with carboplatin-based treatment, which is the most commonly used alternative
to cisplatin. Atezolizumab is a PD-L1 blocking antibody that reactivates
the body¹s immune system to fight bladder cancer and has been recently
FDA approved in the management of advanced urothelial cancer in the
second-line setting after failure of platinum-based chemotherapy.
Dr. Katie Greenzang[/caption]
Katie Greenzang, MD
Dana-Farber/Boston Children’s Cancer and Blood Disorders Center
MedicalResearch.com: What is the background for this study? What are the main findings?
Dr. Greenzang: Advances made over the last several decades mean that more than 80 percent of children diagnosed with cancer will become long-term survivors. However, many of these survivors experience physical and cognitive late effects of the treatment that cured them. We surveyed 352 parents of children recently diagnosed with cancer to assess how well they understood their children’s risk of future limitations in physical abilities, intelligence, and quality of life. We found that an overwhelming majority of parents (92 percent) are very interested in learning about possible late effects, and most (86 percent) seek detailed information. Yet, parent and physician predictions of a child’s risk of experiencing late effects of treatment often don’t match. Among children identified by their oncologists as being at high risk for such challenges, only 38 percent of parents recognized this risk in physical abilities, 21 percent in intelligence, and 5 percent in quality of life.
Dr. Gregory Idos[/caption]
Gregory Idos MD
Division of Gastroenterology and Hepatology
Keck School of Medicine
University of Southern California
Los Angeles, CA 90033
MedicalResearch.com: What is the background for this study? What are the main findings?
Dr. Idos: Identifying individuals at increased risk for hereditary cancer prompts enhanced cancer surveillance as early detection mitigates disease specific morbidity and mortality. This justifies germ line genetic testing for specific cancer risk alleles. In recent years, the field of cancer genetics has moved from a gene by gene sequencing approach to now having the ability to examine multiple genes concurrently. Multiplex gene panel (MGP) testing allows simultaneous analysis of multiple high- and moderate- penetrance genes. As a result, more pathogenic mutations and variants of uncertain significance (VUS) are discovered. MGP tests are increasingly being used by cancer genetic clinics, but questions remain about the clinical utility and complexities of these tests.
We are conducting a multi center prospective trial to measure the added yield of detecting pathogenic mutations using the MGP approach. In our interim analysis of the first 1000 participants, we found that multiplex gene panel testing increased the yield of detection of pathogenic mutations by 26%. In some cases, we found patient’s who had a mutation in the BRCA gene, but their family history did not indicate a history of breast or ovarian cancer.
Dr. Andrea Wickremasinghe[/caption]
Andrea C. Wickremasinghe, MD
Neonatologist
Kaiser Santa Clara California
MedicalResearch.com: What is the background for this study?
Response: Neonatal jaundice is common and is often treated with phototherapy. Phototherapy is typically considered to be benign. In the past decade, phototherapy use has increased and it is sometimes started at bilirubin levels below recommended treatment thresholds. Beginning in the 1970’s, in-vitro and in-vivo studies have shown phototherapy to be associated with cellular changes implicated in the pathogenesis of cancer. Epidemiologic studies have yielded mixed results, with some studies showing associations between phototherapy and leukemia and other studies failing to show this association. In this study, we used a large statewide administrative dataset to investigate the relationship between neonatal phototherapy and cancer in the first year after birth.
Dr. Robert Wong[/caption]
Robert Wong, M.D., M.S.
Attending Physician, Gastroenterology & Hepatology
Director, GI Education & Research
Highland Hospital I A member of Alameda Health System
Oakland, CA
MedicalResearch.com: What is the background for this study? What are the main findings?
Dr. Wong: Colorectal cancer is a leading cause of morbidity and mortality in the United States. Early diagnosis through implementation of effective screening and surveillance programs leads to earlier staged tumor at time of diagnosis, which increases the treatment opportunities and improves overall survival. However, disparities in access to effective screening and surveillance can impair timely diagnosis and lead to advanced disease, limited treatment options and poor outcomes. The current study evaluated race/ethnicity-specific disparities in colorectal cancer epidemiology at a large urban safety net hospital and observed African American patients had significantly more advanced cancer stage at the time of diagnosis. Our study observed that African Americans were over 5 times more likely to have advanced stage 3-4 colon cancer at time of diagnosis compared with non-Hispanic white patients with colon cancer. While these findings are likely multifactorial, it sheds important light on race/ethnicity-specific disparities in colorectal cancer epidemiology and helps target future education and research to improve outcomes.