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Biodegradable gel being studied as a treatment for esophageal cancer
April 16, 2009Nonsurgical therapy for underdiagnosed, rare and deadly disease
(CHICAGO) -- Gastroenterologists at Rush University Medical Center are studying the safety and efficacy of a new system for delivering chemotherapy for patients with esophageal cancer, a rare, but deadly disease that attacks the throat. The unique drug therapy delivers a highly concentrated dose of chemotherapy injected directly on to the hard-to-reach tumors in the esophagus non-surgically. Researchers at Rush are trying to determine if the gel treatment can reduce the size of the cancerous tumors.
Patients diagnosed with esophageal cancer are usually diagnosed at very advanced stages and not only have to undergo chemoradiation therapy, but may also have an esophagectomy, which is a surgical procedure to remove a part of or the entire esophagus.
"Patients with esophageal cancer have very few treatment options and life expectancy can be less than two years from first diagnosis," said Dr. Sohrab Mobarhan, principal investigator of the study and clinical director of the Coleman Foundation Comprehensive Clinic for Gastrointestinal Cancers at Rush. "This also could potentially be a viable treatment option for patients who have inoperable tumors located in their esophagus."
The investigational drug, called OncoGel, is made of two major components, the ReGel drug delivery system, which is a gel made up of ingredients used in biodegradable stitches, and paxclitaxel, a well established, FDA-approved anti-cancer chemotherapy agent. Patients receive a one-time injection of OncoGel during an endoscopy.
"In pilot studies, OncoGel has been shown to continuously release paclitaxel, which is the chemotherapy agent, in concentrated doses at a higher magnitude than in just delivering it through the blood for up to six weeks," said Mobarhan.
Esophageal cancer can develop when stomach acid backs up into the lower esophagus, in some cases damaging cells in the inner layer of the esophagus. This abnormal cellular change is known as Barrett's esophagus. A person could ultimately develop cancer of the esophagus as a result of developing Barrett's.
"Because the symptoms do not seem unusual, the disease can go unnoticed and ignored for long periods of time," said Mobarhan. "A chronic cough, sore throat, indigestion and acid reflux are some of the symptoms that can mask the disease. The lesions that form into cancerous tumors can cause the opening of the esophagus to narrow to nearly half its usual width and make it difficult to swallow."
Data indicates that only 16,000 new cases of esophageal cancer are reported in the U.S. in 2008 and more than 14,000 people -- almost 90 percent -- died from the disease.
In an earlier phase of the study of OncoGel in patients with late stage inoperable esophageal cancer, 70 percent of patients had a reduction in tumor volume when OncoGel was used in combination with radiotherapy. In addition, after treatment, biopsy samples did not contain tumor cells in almost 40 percent of patients.
Rush University Medical Center
"Patients with esophageal cancer have very few treatment options and life expectancy can be less than two years from first diagnosis," said Dr. Sohrab Mobarhan, principal investigator of the study and clinical director of the Coleman Foundation Comprehensive Clinic for Gastrointestinal Cancers at Rush. "This also could potentially be a viable treatment option for patients who have inoperable tumors located in their esophagus."
The investigational drug, called OncoGel, is made of two major components, the ReGel drug delivery system, which is a gel made up of ingredients used in biodegradable stitches, and paxclitaxel, a well established, FDA-approved anti-cancer chemotherapy agent. Patients receive a one-time injection of OncoGel during an endoscopy.
"In pilot studies, OncoGel has been shown to continuously release paclitaxel, which is the chemotherapy agent, in concentrated doses at a higher magnitude than in just delivering it through the blood for up to six weeks," said Mobarhan.
Esophageal cancer can develop when stomach acid backs up into the lower esophagus, in some cases damaging cells in the inner layer of the esophagus. This abnormal cellular change is known as Barrett's esophagus. A person could ultimately develop cancer of the esophagus as a result of developing Barrett's.
"Because the symptoms do not seem unusual, the disease can go unnoticed and ignored for long periods of time," said Mobarhan. "A chronic cough, sore throat, indigestion and acid reflux are some of the symptoms that can mask the disease. The lesions that form into cancerous tumors can cause the opening of the esophagus to narrow to nearly half its usual width and make it difficult to swallow."
Data indicates that only 16,000 new cases of esophageal cancer are reported in the U.S. in 2008 and more than 14,000 people -- almost 90 percent -- died from the disease.
In an earlier phase of the study of OncoGel in patients with late stage inoperable esophageal cancer, 70 percent of patients had a reduction in tumor volume when OncoGel was used in combination with radiotherapy. In addition, after treatment, biopsy samples did not contain tumor cells in almost 40 percent of patients.
Rush University Medical Center
Esophageal Cancer Current Events and Esophageal Cancer News RSSReflux esophagitis due to immune reaction, not acute acid burn, UT Southwestern researchers report
Contrary to current thinking, a condition called gastroesophageal reflux disease (GERD) might not develop as a direct result of acidic digestive juices burning the esophagus, UT Southwestern Medical Center researchers have found in an animal study.
African-Americans with colorectal cancer have poorer outcomes, lower survival rates
New research published in the November issue of the Journal of the American College of Surgeons shows that African-American patients with colorectal cancer are more likely to be diagnosed with advanced disease and are less likely to undergo surgical procedures compared with Caucasians, suggesting that improvements in screening and rates of operation may reduce differences in colorectal cancer outcomes for African-Americans.
Surgeons at Boston Medical Center offering new procedure for acid reflux/GERD
Boston Medical Center (BMC) surgeons are now offering patients an incisionless alternative to laparoscopic and traditional surgery for treatment of acid reflux or GERD.
Barrett's esophagus patients have same survival rates as general population
New Mayo Clinic research has found that survival rates of patients with Barrett's esophagus, which can be a precursor for esophageal cancer, are no different than the survival rates for the general population.
GERD negatively impacts sleep quality, results in considerable economic burden
There has been much debate about the relationship between gastroesophageal reflux disease (GERD) and sleep.
Heavy drinkers face significantly increased cancer risk
Heavy drinkers of beer and spirits face a much higher risk of developing cancer than the population at large, says a group of Montreal epidemiologists and cancer researchers.
University of Saskatchewan and Canadian Synchrotron researchers shed light on esophageal disease
Canadian Light Source (CLS) staff scientist Luca Quaroni and Dr. Alan Casson, Head of the Department of Surgery at the University of Saskatchewan (U of S) used the synchrotron's infrared microscope to identify tissue afflicted with a condition known as Barrett's Esophagus from chemical fingerprints associated with the disease, which can lead to esophageal cancer.
NEJM study finds radiofrequency ablation can reverse Barrett's esophagus, reduce cancer risk
Patients who have gastroesophageal reflux disease (GERD) for a prolonged period have an increased risk of developing Barrett's esophagus, a pre-cancerous condition where the tissue lining the esophagus becomes damaged by stomach acid and transformed into something like the inside of the stomach.
Technique eradicates problems in most patients with Barrett's esophagus
A procedure that uses heat generated by radio waves to treat Barrett's esophagus, a condition caused by acid reflux (severe heartburn), can eliminate signs of the potentially cancer-causing disorder and reduce the risk that the disease will progress.
Study examines reliability of clinical and pathological diagnoses of Barrett's esophagus
In a review of more than 2,000 patients coded for Barrett's esophagus, electronic diagnosis overestimated the prevalence of the disease according to researchers in California.
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