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    <recommendedItem id="20100101_19_440"
                     title="Soft Drinks Linked to Pancreatic Cancer Risk (CME/CE)"
                     score="0.014"
                     href="http://www.medpagetoday.com/HematologyOncology/OtherCancers/tb/18354?impressionId=1265804175881"
                     
      &lt;p&gt;Regular consumers of sugary soft drinks are at higher risk for pancreatic cancer than fruit juice drinkers or the general population, a new Singaporean study has found.&lt;/p&gt;
&lt;p&gt;Chinese men and women living in Singapore who drank two or more soft drinks per week were 87% more likely to contract pancreatic cancer after the researchers adjusted for factors such as smoking (95% CI 1.10 to 3.15), according to the report published Feb. 8 in &lt;em&gt;Cancer Epidemiology, Biomarkers &amp;amp; Prevention.&lt;/em&gt;&lt;/p&gt;
&lt;p&gt;&quot;In this large prospective cohort of Chinese men and women in Singapore, those who reported regular soft drink consumption were at increased risk of pancreatic cancer when compared with those who largely abstained,&quot; Mark Pereira, PhD, of the School of Public Health at the University of Minnesota, and colleagues wrote. &quot;There was no association between consumption of juice and risk of pancreatic cancer.&quot;&lt;/p&gt;
&lt;p&gt;While pancreatic cancer is relatively rare, it is one of the most deadly cancers, with less than 5% of patients surviving five years after diagnosis. Although rates have generally plateaued in the U.S., they continue to climb in some Asian countries, including Singapore.&lt;/p&gt;
&lt;p&gt;&quot;This increase may reflect demographic and socioeconomic shifts as well as a transition towards a more westernized lifestyle and diet,&quot; the authors wrote.&lt;/p&gt;
&lt;p&gt;Research has shown that insulin promotes pancreatic cancer cell growth, and some researchers think sugary foods could result in blood sugar and insulin fluctuations that expose the pancreas to high concentrations of insulin.&lt;/p&gt;
&lt;p&gt;While fruit juices contain sugar, soft drinks are the major sources of added sugar in the U.S. diet and major contributors to hyperglycemia and hyperinsulinemia.&lt;/p&gt;
&lt;p&gt;Pereira and colleagues followed 60,524 men and women who enrolled in the Singapore Chinese Health Study between April 1993 and December 1998 and were followed for 14 years.&lt;/p&gt;
&lt;p&gt;At enrollment, the participants completed a 146-question food frequency questionnaire, which contained three items related to soft drinks and juice. The questions asked the participants how much, if any, they drank of soft drinks such as Coca-Cola and 7-Up, orange juice, and other fruit and vegetable juices.&lt;/p&gt;
&lt;p&gt;The dietary data was later cross-referenced with records from the Singapore Cancer Registry and the Singapore Registry of Births and Deaths, to determine which of the participants had died of pancreatic cancer and whether it might be related to their soft drink or juice consumption.&lt;/p&gt;
&lt;p&gt;Overall, researchers found that 140 participants had contracted pancreatic cancer.&lt;/p&gt;
&lt;p&gt;The results were largely consistent with three of four previous U.S. studies on the links between pancreatic cancer and soft drinks. Three of the U.S. studies found an association between soft drinks and cancer.&lt;/p&gt;
&lt;p&gt;The author acknowledged that soft drink consumers are more likely than abstainers to participate in other unhealthy behaviors, including smoking and overeating, which makes it difficult to determine that soft drink consumption is an independent risk factor for pancreatic cancer.&lt;/p&gt;
&lt;p&gt;For instance, smokers in their study were at higher risk for pancreatic cancer. &quot;We could not rule out the possibility of residual confounding by factors associated with the habit of drinking soft drinks or other unascertained factors such as waist circumference,&quot; they wrote.&lt;/p&gt;
&lt;p&gt;They also noted that the study was limited in statistical power because pancreatic cancer is rare, which limited the sample size of cancer cases. &quot;Also, because we were unable to collect repeated dietary measurements in this study, we were unable to account for changes in consumption of soft drinks and juices,&quot; they wrote, &quot;especially when the diagnosis of diabetes occurred after the baseline interview.&quot;&lt;/p&gt;
&lt;p&gt;&lt;em&gt; &lt;/em&gt;&lt;/p&gt;
&lt;div style=&quot;float:left;border-style:solid;border-width:1px;border-color:#8dabbc;font-family:arial;font-size:12px;background-color:#DBE9F2;padding:5px;&quot;&gt;&lt;p&gt;The study was funded by the National Cancer Institute.&lt;/p&gt;&lt;p&gt;The authors reported no financial conflicts of interest.&lt;/p&gt;&lt;/div&gt;&lt;div style=&quot;clear:both;&quot;&gt;&lt;/div&gt;
    </recommendedItem>
    <recommendedItem id="20100101_19_198"
                     title="Fish Oils May Slow Genetic Aging (CME/CE)"
                     score="-0.003"
                     href="http://www.medpagetoday.com/PrimaryCare/DietNutrition/tb/18043?impressionId=1265804175881"
                     
      For heart disease patients, omega-3 fatty acids may protect against morbidity and mortality by slowing biological aging, researchers say.&lt;br&gt;
&lt;br&gt;Patients who had the highest omega-3 fatty acid blood levels also had telomeres that shortened at a significantly slower rate than patients with lower intake, Ramin Farzaneh-Far, MD, of the University of California San Francisco, and colleagues reported in the Jan. 20 &lt;em&gt;JAMA&lt;/em&gt;.&lt;br&gt;
&lt;br&gt;Patients in the lowest quartile of omega-3 fatty acid blood levels had the fastest rate of telomere shortening over five years: 0.13 telomere-to-single-copy gene ratio (95% CI 0.09 to 0.17).&lt;br&gt;
&lt;br&gt;Those who had the highest omega-3 fatty acid blood levels had the slowest rate of telomere shortening: 0.05 telomere-to-single copy ratio (95% CI 0.02 to 0.08, &lt;em&gt;P&lt;/em&gt;&amp;lt;0.001).&lt;/p&gt;
&lt;p&gt;Telomeres are the protective caps at the end of chromosomes that reveal how biological stress ages a person.&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&quot;Patients with the highest levels of omega-3 fish oils were found to display the slowest decrease in telomere length, whereas those with the lowest levels of omega-3 fish oils in the blood had the fastest rate of telomere shortening,&quot; Farzaneh-Far said. &quot;This suggests that these patients were aging faster than those with higher fish oil levels.&quot;&lt;/p&gt;
&lt;p&gt;They said omega-3s may protect against oxidative stress, or increase the activity of the telomerase enzyme, which would decrease telomere shortening by creating more accurate telomere copies.&lt;/p&gt;
&lt;p&gt;But some cardiologists were quick to point out that the results are preliminary and need to be replicated before physicians can use them in practice.&lt;/p&gt;
&lt;p&gt;Since the study was observational and couldn&apos;t prove cause-and-effect, &quot;we don&apos;t really know whether ingestion of omega-3 fatty acids resulted in this &apos;benefit,&apos;&quot; Steven E. Nissen, MD, of the Cleveland Clinic, noted in an e-mail. &quot;It remains entirely possible that individuals who consume more fish also have other favorable healthy habits.&quot;&lt;/p&gt;
&lt;p&gt;Nissen also pointed out that the study was not randomized to compare fish oil directly with a placebo treatment, and cautioned that &quot;the relationship between telomere shortening and cardiovascular health is not well established.&quot;&lt;/p&gt;
&lt;p&gt;Studies have shown that omega-3s appear to be effective for patients with coronary artery disease. Yet the underlying mechanisms are not well understood. Some researchers think it may have something to do with anti-inflammatory, triglyceride-lowering, antihypertensive, antiplatelet, or antiarrhythimic effects.&lt;/p&gt;
&lt;p&gt;Research has shown that the length of telomeres  --  chromosome caps that have long been compared to the plastic ends of shoelaces  --  may be a marker of biological age. Biological age is independent of chronological age, and takes into account genetic and environmental stressors that may wreak havoc on cells.&lt;/p&gt;
&lt;p&gt;Since there&apos;s been increasing evidence that omega-3s exert direct effects on aging and age-related diseases, the researchers decided to investigate them as a potential mechanism for protective effects in heart patients.&lt;/p&gt;
&lt;p&gt;So they conducted a prospective cohort study of 608 patients in California with stable coronary artery disease. Patients were recruited from the Heart and Soul Study between September 2000 and December 2002.&lt;/p&gt;
&lt;p&gt;They were followed for five years, and the researchers assessed telomere length of their leukocytes at baseline and again at the end of follow-up.&lt;/p&gt;
&lt;p&gt;&quot;By measuring telomere length at two different times,&quot; Farzaneh-Far said, &quot;we were able to see the speed at which the telomers are shortening and that gives us some indication of how rapidly the biological aging process is taking place in these patients.&quot;&lt;/p&gt;
&lt;p&gt;The researchers found that baseline omega-3 fatty acid levels were positively correlated with changes in telomere length over five years (&lt;em&gt;P&lt;/em&gt;=0.001).&lt;/p&gt;
&lt;p&gt;The relationships remained after controlling for potential confounders including demographics, blood pressure, serum lipids, and inflammatory biomarkers.&lt;/p&gt;
&lt;p&gt;The researchers noted that each standard-deviation increase in fatty acid levels was associated with a 32% reduction in the odds of telomere shortening (95% CI 0.47 to 0.98).&lt;/p&gt;
&lt;p&gt;So how do omega-3s stop telomeres from getting smaller?&lt;/p&gt;
&lt;p&gt;They may protect against oxidative stress, which is a major driver of telomere shortening and aging. Or, fatty acids may increase the activity of the enzyme telomerase, which can result in more accurate copying and hence, longer telomeres, the researchers suggested.&lt;/p&gt;
&lt;p&gt;The researchers agreed that the study was limited by its observational nature, which leaves no room for definitive conclusions about causality. Also, they only measured telomere length in leukocytes, which means the findings may not translate to other cell types, including myocardial or endothelial cells.&lt;/p&gt;
&lt;p&gt;Researchers who were not involved in the study noted that omega-3s have been shown to have effects on other factors that contribute to heart disease risk.&lt;/p&gt;
&lt;p&gt;&quot;Omega-3 fatty acids have a potent positive impact on lipids that circulate in the blood stream and damage the heart,&quot; said Cam Patterson, MD, of the University of North Carolina Chapel Hill McAllister Heart Institute. &quot;The effects of omega-3 fatty acids on lipids are still the best advertisement for their use to prevent heart disease.&quot;&lt;/p&gt;
&lt;p&gt;Merle Myerson, MD, of Columbia University, agreed. &quot;[The researchers] don&apos;t mention that omega-3 fatty acids lower triglycerides and non-HDL cholesterol, and stabilize cell membranes  --  all of which may reduce risk for coronary artery disease and sudden cardiac death.&quot;&lt;/p&gt;
&lt;p&gt;Myerson said the findings need to be replicated in future studies.&lt;/p&gt;
&lt;p&gt;While their study may not have implications for intake of omega-3s among the general population, the researchers said it upholds recommendations for patients with heart disease.&lt;/p&gt;
&lt;p&gt;&quot;The results of our study underscore the recommendations of the American Heart Association, that patients with known coronary artery disease should be getting at least one gram a day of omega-3 fish oil,&quot; Farzaneh-Far said.&lt;/p&gt;
&lt;div style=&quot;float:left;border-style:solid;border-width:1px;border-color:#8dabbc;font-family:arial;font-size:12px;background-color:#DBE9F2;padding:5px;&quot;&gt;&lt;p&gt;The study was supported by grants from the American Heart Association and the Bernard and Barbro Foundation.&lt;/p&gt;&lt;p&gt;The Heart and Soul Study was supported by the Department of Veterans Affairs, the National Heart, Lung, and Blood Institute, the Robert Wood Johnson Foundation, the American Federation for Aging Research, the Ischemia Research and Education Foundation, and the Nancy Kirwan Heart Research Fund.&lt;/p&gt;&lt;p&gt;A co-author reported financial conflicts with GlaxoSmithKline and Monsanto, and founded OmegaQuant Analytics to offer blood omega-3 fatty acid testing.&lt;/p&gt;&lt;/div&gt;&lt;div style=&quot;clear:both;&quot;&gt;&lt;/div&gt;
&lt;p&gt;&lt;em&gt;This article was developed in collaboration with ABC News. &lt;/em&gt;&lt;img src=&quot;http://www.medpagetoday.com/upload/2009/10/1/14357_1.jpg&quot; mce_src=&quot;http://www.medpagetoday.com/upload/2009/10/1/14357_1.jpg&quot; alt=&quot;&quot;&gt;&lt;/p&gt;
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    <recommendedItem id="20090101_3_355"
                     title="For Soft Drink Guzzlers, Pancreatic Cancer Is Greater Risk"
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