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Showing 651 - 700Overexpression of p16 Does Not Indicate Increased Risk of Breast Cancer in Women with Atypical Hyperplasia
Women diagnosed with atypical hyperplasia have a substantial risk of subsequent development of breast cancer, with a cumulative incidence of approximately 30% at 25 years. Atypical hyperplasia is considered to be a precursor to ductal carcinoma in situ (DCIS). p16 (a nuclear protein encoded by the...
Impact of p53 Status on Cancer Treatment Selection
Wild-type p53 emerges from a latent state and becomes stabilized and activated in response to genotoxic and cellular stress signals, resulting in the transcriptional modulation of multiple genes involved in regulating cell-cycle progression, senescence, and apoptosis. More than 50% of human tumors...
Targeting AKT/mTOR May Improve Response to Monoclonal Antibodies in Some Cancers
The insulin-like growth factor (IGF) network plays a central role in regulating tumor cell growth and differentiation, tumor angiogenesis, metastasis, apoptosis, and multidrug resistance. Increased IGF-1 receptor (IGF-1R) expression and circulating IGF-1 are associated with increased risk for...
Expert Point of View: Dual HER2 Blockade Substantially Delays Disease Progression
The availability of effective therapies for HER2-positive tumors has made breast cancer a better managed disease, but outcomes could be further enhanced through the targeting of other players in this pathway, emerging data suggest. C. Kent Osborne, MD, of Baylor College of Medicine, Houston,...
Combination of Oncolytic Virus and Chemotherapy Holds Promise in Glioblastoma
Glioblastoma remains a uniformly lethal disease. Both the alkylating agent temozolomide and oncolytic viruses (engineered to preferentially infect and kill cancer cells) hold promise in treatment of glioblastoma. The effects of combining the two and the mechanisms of their interaction on cancer...
Six1-Eya2 Interaction a Potential Target in Blocking Breast Cancer Metastasis
The Six1 gene is a key regulator of embryonic development that requires interaction with the Eya family of proteins (Eya1-4) to activate transcription of genes involved in neurogenesis, myogenesis, and nephrogenesis. Overexpression of Six1 and Eya is observed in a number of cancers. In breast...
Significant Differences in Genetic Characteristics of Primary Colorectal Cancer and Hepatic Metastases
Vermaat and colleagues from the University Medical Center Utrecht, Hubrecht Institute, Utrecht, The Netherlands, and Hoffman-La-Roche Inc./Genentech, Nutley, New Jersey, recently showed that there was significant genetic variation between individual primary colorectal cancer tumors and their...
PI3K Inhibitors May Improve Response to Cancer Immunotherapy
The induction of antitumor immunity by vaccines or immunotherapies is inhibited by the immunosuppressive microenvironment of tumors. Toll-like receptor (TLR) agonists have the potential to increase inflammatory antitumor effects in the microenvironment, but these ligands can exert a mixture of both ...
Androgen Deprivation Therapy May Lead to Castration Resistance in Prostate Cancer
Although androgen-deprivation therapy is effective in inducing regression of androgen-dependent prostate cancer, relapse often occurs in an androgen-independent manner and is associated with poor prognosis. The mechanisms underlying castration resistance are not fully understood. Sung and...
Targeted Mutations in ATR Pathway and Implications for Combination Strategies
Many chemotherapy agents work by causing DNA strand breaks or accumulation of DNA replication intermediates. ATR (ataxia-telangiectasia mutated and Rad 3-related protein) is a potential target for combination drug strategies, because signaling of this protein in response to such altered DNA...
Targeted Massively Parallel Sequencing Identifies Clinically Relevant Alterations in Cancer Genes
Systematic methods for profiling tumor genomic alterations remain underdeveloped, with current clinical profiling usually being confined to identification of limited numbers of oncogene point mutations. At present, there is no systematic technique for interrogating tumor samples in situ for a...
SMAC Mimetics Induce Proinflammatory Cancer Cell Death and Adaptive Antitumor Immune Response
SMAC/DIABLO (second mitochondria-derived activator of caspase/direct inhibitor of apoptosis-binding protein with low pI) is a proapoptotic mitochondrial protein that is released in response to various apoptotic stimuli. Molecular mimetics of SMAC are being investigated for use in cancer treatment,...
Bone Morphogenesis Protein 4 Pathway as Treatment Target in Hepatocellular Carcinoma
Bone morphogenesis protein 4 (BMP4), which belongs to the transforming growth factor (TGF)-β family, is a multifunctional cytokine that is known to be involved in human carcinogenesis. The cytokine exerts its effects through pathways dependent on and independent of SMAD proteins, which are the...
Targeting Human Endogenous Retrovirus K Envelope Protein Inhibits Breast Cancer Growth
The human genome contains a large variety of endogenous retroviral sequences (approximately 8% of the genome). Although most of these are highly defective, the human endogenous retrovirus type K (HERV-K) family shows conservation of apparently intact retroviral genes and is transcriptionally active ...
PEDF Has Cytotoxic Effect on Breast Cancer Cells and Neuron-protective Effect
The cytokine pigment epithelium–derived factor (PEDF) is downregulated in brain metastases of breast cancer by approximately 14-fold compared with primary breast tumors, suggesting that promoting its expression might inhibit metastatic spread. Normal breast epithelial cells express high levels of...
ASCO Continues to Support Oncologists in Electronic Health Records Adoption at 2012 Annual Meeting
As part of its ongoing effort to support oncology practices in adopting Electronic Health Records (EHR) to improve their quality of care, ASCO is holding its sixth annual EHR Vendor Lab, from June 2-4 at the 2012 ASCO Annual Meeting in Chicago. This resource gives attendees the opportunity to test...
Inhibition of IL-8 Receptor Reduces Colorectal Cancer Proliferation and Sensitizes the Disease to Oxaliplatin
Recent studies have shown that interleukin-8 (IL-8) and its receptors CXCR1 and CXCR2 are significantly upregulated in colorectal cancer tumors and their microenvironment and act as regulators of proliferation, angiogenesis, and metastasis. Ning and colleagues from the University of Southern...
Characteristics of Field Cancerization in Histologically Normal Tissue Adjacent to Breast Tumors
It has been shown that a field of genetically altered but histologically normal tissue extends 1 cm or more from the margins of human breast tumors. The characteristics of this field are not fully understood, although it is clear that the molecular alterations in affected cells could provide...
New Research Shows Promise in Cachexia, a Persistent Clinical Challenge
In the late 1980s, researchers led by Alfred L. Goldberg, PhD, first isolated the large protein complexes now called 26S proteasomes, which are the sites where most cellular proteins are degraded back to amino acids. Protein degradation by the proteasome pathway is critical in regulating many...
Progress in Treating Chronic Lymphocytic Leukemia Has Led to Across-the-board Improvements in Survival
Four decades ago, Kanti R. Rai, MD, was determined to figure out why some of his patients with chronic lymphocytic leukemia (CLL) died within 2 years after their diagnosis, while others lived for 20 or even 30 years. At the time, Dr. Rai was a young scientist doing research in leukemia at...
Regional Infusion of Designer T Cells to Treat Intrahepatic Metastases
Designer T cells are modified from normal T cells to express specific immune receptors that allow them, via antibody-directed recognition or other mechanisms, to kill malignant cells bearing particular antigens. The Surgical Immunotherapy Lab at the Roger Williams Medical Center, Providence, Rhode...
Anti-EpCAM Antibody-Drug Conjugate Shows High Activity against Pancreatic Cancer
Human epithelial cell adhesion molecule (EpCAM) is overexpressed in many cancers. Although anti-EpCAM antibodies have shown promise in preclinical studies, early-phase clinical evaluation of these antibodies has been disappointing. To determine whether the antitumor activity of anti-EpCAM antibody...
Gab2 Promotes Characteristics of Epithelial-to-Mesenchymal Transition in Ovarian Cancer
Ovarian cancer is often diagnosed at a late stage, when cancer cells have already migrated and invaded other tissues and organs. Wang and colleagues from the University of Colorado Denver and the Dana-Farber Cancer Institute in Boston, showed that Gab2—a scaffolding adaptor protein that is...
Complex Relationship between Metformin and BRAF-mutant Tumors
The antidiabetic drug metformin appears to lower cancer risk in diabetic patients and has shown antitumor activity in preclinical studies. Suppression of mTOR signaling via AMP kinase (AMPK)-dependent TOR complex 1 (TORC1) inhibition is one of the proposed mechanisms by which metformin appears to...
Pretreatment Tumor Hypoxia Predicts Biochemical Failure after Radiotherapy for Prostate Cancer
Hypoxia often occurs early in solid tumor development as a result of imbalances between oxygen supply and consumption and may lead to genetic and molecular signaling that influences the biology and clinical behavior of tumors and response to treatment. Milosevic and colleagues from Princess...
Markers in Cancer 2012, to be Held October 11–13, Will Seek to Move the Field of Biomarkers to the Next Phase
There are hundreds and hundreds of papers published on biomarkers in cancer each year, but very few make it over the hurdles necessary to be used in actual patient care, said James L. Abbruzzese, MD, Chair of the Department of Gastrointestinal Medical Oncology at the University of Texas MD Anderson ...
Full Membership: What It Means, What It Offers, and Why It’s Essential
As part of our series explaining the benefits of ASCO’s various membership categories, in this issue we focus on the Full Membership Category Involvement in ASCO—the largest and most inclusive professional organization in oncology—allows those involved in cancer care to chart the very course of the ...
At More than a Century Old, American Association for Cancer Research Continues to Evolve
Margaret Foti, PhD, MD (hc), has been Chief Executive Officer of the American Association for Cancer Research (AACR) since 1982, and has been instrumental in launching some of the most seminal efforts of the cancer research organization. Over the past 4 years, she has helped spearhead the AACR’s...
When It Comes to Scientific Exploration, Renowned Clinical Investigator Lets the Work Guide His Path
Internationally renowned clinical investigator Daniel D. Von Hoff, MD, FACP, attended grade school in a one-room schoolhouse on the rural outskirts of Oshkosh, Wisconsin. Polio was a scourge at the time, and Dr. Von Hoff recalled lining up with his skittish classmates to get the newly developed...
Trailblazing Oncologist Had Instrumental Role in France’s War on Cancer
David Khayat, MD, PhD, Chair of the Department of Medical Oncology at the Pitié-Salpêtrière Hospital in Paris, was inspired to become an oncologist by an episode that could have been ripped from the pages of one of his best-selling novels. At the age of 18, Dr. Khayat was the witness at his best...
After 3 Decades at MD Anderson, Leukemia Researcher Shows No Sign of Slowing Down
Hagop M. Kantarjian, MD, Chair of the Department of Leukemia at The University of Texas MD Anderson Cancer Center, was born in Lebanon. The only member of his family to have pursued a career in medicine, he received his medical degree from the American University of Beirut (AUB), which was founded...
Tracing Breast Cancer Luminary’s Path to Oncology, from Hungary to Houston
Gabriel N. Hortobagyi, MD, FACP, ASCO Past President (2006-2007), grew up under the oppressive regime of communist Hungary during the Cold War. “As college-educated intellectuals, my family was among the ‘politically undesirables,’ and if we had not escaped Hungary, neither my two sisters nor I...
From Small-town House Calls to Bone Marrow Transplants, Nobel Laureate Continues Father’s Legacy
“I echo the sentiments of many previous Nobel laureates when I say that the success we celebrate today was made possible by the work of many others in this and in related fields.” So ended the Nobel Lecture by E. Donnall Thomas, MD, the famed investigator and 1990 Nobel Laureate in Physiology or...
Pretreatment Tumor Hypoxia Predicts Biochemical Failure after Radiotherapy for Prostate Cancer
Hypoxia often occurs early in solid tumor development as a result of imbalances between oxygen supply and consumption and may lead to genetic and molecular signaling that influences the biology and clinical behavior of tumors and response to treatment. Milosevic and colleagues from Princess...
Soy Phytoestrogens and Breast Cancer: An Enduring Dilemma
The impact of soy consumption on breast cancer diagnosis and outcome has remained of concern to clinicians and researchers for the past 20 years. Although studied extensively in epidemiologic studies as well as lab and animal research, no medical consensus on soy’s effects has emerged. Many studies ...
Cancer Care in Rwanda: A Model of Creative Partnerships
While disparities in cancer care remain problematic in wealthy industrial nations like the United States, the challenges faced in poorer regions of the world are, by comparison, inestimable. Nationally regarded health-care expert Lawrence N. Shulman, MD, of Dana-Farber Cancer Institute, is part of...
Astragalus
The use of dietary supplements by cancer patients has risen significantly over the past 2 decades despite insufficient evidence of safety and effectiveness. Finding reliable sources of information about dietary supplements can be daunting. Patients typically rely on family, friends, and the...
A Physician, Who Is Also a Cancer Patient, Talks about Medical Errors
In a whispered but resolute voice, Itzhak Brook, MD, MSc, led off his presentation at the 2012 ASCO Annual Meeting1 by telling the audience his voice is weak because he doesn’t have vocal cords. He spoke with the aid of a tracheoesophageal voice prosthesis. “I have practiced medicine for more than ...
Study Shows Routine CT Surveillance Overused in Pediatric Hodgkin Lymphoma
The value of routine CT surveillance monitoring of pediatric patients for recurrence of Hodgkin lymphoma has been unclear. A study of CT surveillance recently reported by Stephan D. Voss, MD, PhD, and colleagues from the Children’s Oncology Group (COG) in the Journal of Clinical Oncology showed...
Researchers Awarded NCI Grants to Address ‘Provocative Questions’
Two scientists are among the first recipients of grants geared to answer “Provocative Questions” in cancer research, a new project funded by the National Cancer Institute (NCI), part of the National Institutes of Health (NIH). Cynthia Sears, MD, and Peter Searson, PhD, both of Johns Hopkins, will...
Genitourinary Cancers Symposium Still Intimate Despite Record Growth
Despite its exponential growth since launching in 2007—from 1,450 attendees then to a record 2,530 last year—the Genitourinary (GU) Cancers Symposium remains an inviting meeting that feels small, accessible, and comfortable. And that’s the perfect blend for networking, said Jeff Michalski, MD,...
TRIM27 as Target in Cancer Development
The tripartite motif family protein 27 (TRIM27) is a transcriptional repressor that reduces induction of cell senescence by retinoblastoma-associated protein (RB1). High levels of TRIM27 expression occur in several human cancers and have been associated with poor prognosis in breast and endometrial ...
VEGF Pathway Biomarker for Outcome with Bevacizumab
No biomarkers are available to guide patient selection for treatment with the anti-VEGF monoclonal antibody bevacizumab (Avastin). Lambrechts and colleagues from VIB and KULeuven and University Hospital Gasthuisberg, Belgium, and F. Hoffmann-La Roche in Basel, Switzerland, have identified a locus...
Metastasis Promoted by Cleaving and Inhibiting Proapoptotic Effect of von Willebrand Factor
Mochizuki and colleagues from Keio University in Tokyo, the Chemo-Sero-Therapeutic Research Institute in Kumamoto, and RIKEN in Saitama have shown that von Willebrand factor has proapoptotic effects and that a disintegrin and metalloproteinase 28 (ADAM28) promotes metastasis by cleaving and...
Predictive Markers for Outcome with Pazopanib in Metastatic Renal Cell Cancer
Several targeted drugs are approved for treatment of metastatic renal cell cancer, but no validated biomarkers are available for prediction of clinical outcome of treatment with these agents. In a recent study, Tran and colleagues from The University of Texas MD Anderson Cancer Center in Houston,...
Successful Use of Cytoreduction and Hyperthermic Intraperitoneal Chemotherapy May Hinge on Prior Experience
A review of 60 consecutive patients with peritoneal carcinomatosis who underwent cytoreductive surgery plus hyperthermic intraperitoneal chemotherapy (HIPEC)—sometimes called “hot chemotherapy”—found 0% mortality and 33% morbidity, with “a significant reduction of grade III/IV morbidity,...
Genome-wide Analysis Reveals Molecular Pathway Aberrations in Uterine Serous Cancer
The molecular pathogenesis of uterine serous carcinoma, the most aggressive form of uterine cancer, remains largely undefined. Kuhn and colleagues from Johns Hopkins Medical Institutions recently identified prominent genetic alterations in uterine serous carcinoma using whole-exome sequencing....
Whole-blood RNA Expression Profiles as Prognostic Models for Castration-resistant Prostate Cancer
Survival among patients with castration-resistant prostate cancer is highly variable, and there is a scarcity of prognostic markers that could be used to stratify patients in clinical trials, improve treatment, and accelerate drug development. Two recent studies reported in Lancet Oncology have...
Noninvasive Measurement of Interstitial Fluid Pressure as Marker of Tumor Aggressiveness
Increased interstitial fluid pressure in tumors can cause metastatic dissemination and treatment resistance. Study of interstitial fluid pressure has been challenging due to a lack of noninvasive imaging strategies. In a recent study, Hompland and colleagues from the Institute of Cancer Research at ...
Challenging Times: A Day in the Life of a Community Oncologist
Community oncologists man the front line of cancer care, treating upward of 85% of our nation’s patients. Over the past 2 decades, regulatory and economic changes have left many practices in a state of flux and uncertainty, some struggling to keep their doors open. To shed light on the community...
