Guest guest Posted March 30, 2009 Report Share Posted March 30, 2009 Weekly Update - March 30, 2009 (Mailing list information, including unsubscription instructions, is located at the end of this message.) Clinical Pearls Nutrition Research Updates for the Week of March 30, 2009 This VitagramT Brought To You By Tishcon Corp., The Makers of Q-Gel® To Search The Complete Clinical Pearls Database: www.Vitasearch.com For article reprints you may mail, e-mail or fax the authors. Questions or Comments: clinicalpearls@... -------------------------------------------------------------------------- Quote of the Week Patience and perseverance have a magical effect before which difficulties disappear and obstacles vanish. - Quincy -------------------------------------------------------------------------- New Expert Interviews (more...) : a.. Bone Mineral Density, Resistance Training and Antioxidants, Isabelle J. Dionne, Ph.D., Canada b.. Hypertension and Garlic, Kurt M Reinhart, Pharm.D., USA -------------------------------------------------------------------------- Summary# 47080 Topic: Consumption of Onions and Garlic May Lower Risk of Acute Myocardial Infarction Keywords: ACUTE MYOCARDIAL INFARCTION, HEART ATTACK - Allium, Onions, Garlic, Diet Reference: " Allium vegetable intake and risk of acute myocardial infarction in Italy, " Galeone C, La Vecchia C, et al, Eur J Nutr, 2009; 48(2): 120-3. (Address: Dept. of Epidemiology, Istituto di Ricerche Farmacologiche " Negri " , Via La Masa 19, 20156 Milan, Italy. E-mail: galeone@... ). Summary: In a case-control study involving 760 patients with a first episode of acute myocardial infarction (AMI) and 682 controls, results indicate that regular consumption of onions and garlic may be associated with a reduced risk of AMI. Diet information was gathered using a validated food frequency questionnaire. After adjusting for confounders, consumption of at least 1 portion of onions per week was associated with a 22% reduced risk of AMI, compared with consuming a diet with no onions. Similarly, garlic intake was associated with a 16% reduced risk of AMI. Thus, the authors conclude, " The current study, the first from Mediterranean countries, suggests that a diet rich in onions may have a favorable effect on the risk of AMI. " -------------------------------------------------------------------------- Summary# 47083 Topic: Potential Role For Zinc And Copper Supplementation in Slowing Progression of Age-Related Macular Degeneration Keywords: AGE-RELATED MACULAR DEGENERATION, AMD - Zinc, Copper, Metals, Eyes Reference: " Reduced zinc and copper in the retinal pigment epithelium and choroid in age-related macular degeneration, " Erie JC, Pulido JS, et al, Am J Opthalmol, 2009; 147(2): 276-82. (Address: Department of Ophthalmology Mayo Clinic, Rochester, Minnesota, USA. E-mail: erie.jay@... ). Summary: In a study analyzing 88 donor eyes (44 subjects), results indicate that reduced levels of zinc and copper in the retinal pigment epithelium (RPE) and choroid complex were found in eyes of subjects with age-related macular degeneration. Metal levels in both eyes were measured and averaged (treated as one observation). Subjects with age-related macular degeneration (AMD) showed 24% and 23% reduced levels of zinc and copper, respectively, in RPE and choroid complex, compared to subjects without AMD. Thus, the authors of this study conclude, " Reduced RPE and choroid complex zinc and copper levels in AMD eyes combined with previous information that oral supplementation of zinc plus copper reduces the risk of progression of AMD suggests that metal homeostasis plays a role in AMD and in retinal health. " -------------------------------------------------------------------------- Summary# 47087 Topic: Vitamin D Intake May Help Prevent Nonvertebral Fracture Keywords: BONE HEALTH, FRACTURE, HIP FRACTURE, NONVERTEBRAL FRACTURE, BONE BREAK - Vitamin D, 25(OH)D Reference: " Prevention of nonvertebral fractures with oral vitamin D and dose dependency: a meta-analysis of randomized controlled trials, " Bischoff-Ferrari HA, Willett WC, et al, Arch Intern Med, 2009; 169(6): 551-61. (Address: Centre on Aging and Mobility, University of Zurich, University Hospital, Switzerland. E-mail: heike.bischoff@... ). Summary: In a meta-analysis which included results from 20 randomized, double-blind, controlled trials, vitamin D intake was found to prevent non-vertebral fractures in a dose-dependent manner, with a 20% reduction in fractures achieved by a higher dose (> 400 IU/d). Twelve of the trials examined oral vitamin D and non-vertebral fractures (n=42,279) and 8 of the trials involved hip fractures and oral vitamin D (n=40,886). Results found the pooled relative risk to be 0.86 for prevention of non-vertebral fracture and 0.91 for prevention of hip fractures, " but with significant heterogeneity for both end points. " A higher dose of vitamin D and higher blood levels of 25(OH)D were found to be linked to a greater reduction in fracture risk (RR=0.80, n=33,265 from 9 trials for non-vertebral fracture risk and RR=0.82, n=31,872 from 5 trials for hip fracture risk). The authors conclude, " Nonvertebral fract ure prevention with vitamin D is dose dependent, and a higher dose should reduce fractures by at least 20% for individuals aged 65 years or older. " -------------------------------------------------------------------------- Summary# 47092 Topic: DHEA along with Vitamin D and Calcium may Improve Spine BMD Keywords: BONE MINERAL DENSITY, BMD - DHEA, Dehydroepiandrosterone Reference: " Dehydroepiandrosterone replacement therapy in older adults: 1- and 2-y effects on bone, " Weiss EP, Shah K, et al, Am J Clin Nutr, 2009 March 25; [Epub ahead of print]. (Address: EP Weiss, 3437 Caroline Street, Room 3076, St Louis, MO, USA. E-mail: eweiss4@... ). Summary: In a randomized trial involving 58 women and 55 men between the ages of 65 and 75 years, supplementation with 50 mg/d oral DHEA (dehyroepiandrosterone), along with vitamin D (16 mug/d) and calcium (700 mug/d) was found to improve spine BMD (bone mineral density) in women. In the first year of the study, subjects were randomized to DHEA (50 mg/d) or placebo. In the second year of the study, all subjects were given DHEA (open-label). During both years, subjects received vitamin D and calcium supplementation. Among women in the active group, spine BMD increased by 1.7% during the first year and 3.6% after 2 years of supplementation. Among women who received placebo for the first year, spine BMD was unchanged that first year; however, after starting DHEA supplementation in the second year, spine BMD increased to 2.6% above baseline. No such benefits were found among men, or for hip BMD in either sex. Levels of testosterone, estradiol, and insulin-like growth factor 1 increased in the DHEA group alone. These results suggest that supplementation with DHEA, when given along with vitamin D and calcium, may improve spine BMD in women. -------------------------------------------------------------------------- Summary# 47090 Topic: Vitamin D Supplementation May Reduce Cardiovascular Disease Risk in Overweight Persons Keywords: CARDIOVASCULAR DISEASE, OVERWEIGHT, WEIGHT LOSS - Vitamin D, Nutritional Status, 25(OH)D, 25-hydroxyvitamin D Reference: " Vitamin D supplementation enhances the beneficial effects of weight loss on cardiovascular disease risk markers, " Zittermann A, Frisch S, et al, Am J Clin Nutr, 2009 March 25; [Epub ahead of print]. (Address: A. Zittermann, Klinik für Thorax- und Kardiovaskularchirurgie, Herzzentrum Nordrhein-Westfalen, Georgstraße 11, 32545 Bad Oeynhausen, Germany. E-mail: azittermann@... ). Summary: In a placebo-controlled, double-blind study involving 200 healthy, overweight subjects with mean 25(OH)D concentrations of 30 nmol/L (12 ng/mL), supplementation with vitamin D (83 mug/d) for a period of 12 months, while undergoing a weight-reduction program, was found to reduce several markers of cardiovascular disease. Vitamin D supplementation did not appear to have any significant effect on weight loss (-5.7 kg loss in the vitamin D group vs. -6.4 kg loss in the placebo group). Significant reductions in triglycerides (-13.5% vs. +3%), tumor necrosis factor-alpha (a marker of inflammation) (-10.2% vs. -3.2%), and parathyroid hormone (-26.5% vs. -18.7%) were found in the vitamin D group, as compared to the placebo group. 25(OH)D increased by 55.5 nmol/L and calcitriol concentration increased by 40.0 pmol/L among subjects in the vitamin D group. LDL cholesterol concentrations were also slightly raised in the vitamin D group (+5.4%), compared with the placebo group (-2.5%). These results suggest that overweight individuals following a weight reduction regimen may reduce risk factors for cardiovascular disease by supplementing with 83 mug/d vitamin D. -------------------------------------------------------------------------- Summary# 47091 Topic: Multiple Micronutrient Supplementation - Multiple Benefits Keywords: CHILDREN'S GROWTH AND DEVELOPMENT, PREGNANCY, HIV, AIDS, MORTALITY - Micronutrients, Nutritional Status Reference: " Provision of Multiple Rather Than Two or Fewer Micronutrients More Effectively Improves Growth and Other Outcomes in Micronutrient-Deficient Children and Adults, " LH, Peerson JM, et al, J Nutr, 2009; March 25; [Epub ahead of print]. (Address: USDA, Agricultural Research Service Western Human Nutrition Research Center, , CA 95616, USA). Summary: In a review of studies comparing the effects of multiple micronutrient supplementation versus placebo or versus supplementation with just one or two micronutrients on children's growth, health, and development; pregnancy outcomes; nutritional status; and HIV/AIDS mortality and morbidity, supplementation with multiple micronutrients was associated with small but significantly greater improvements in height, weight, hemoglobin, serum zinc, serum retinol, and motor development. According to a Cochrane review, multiple micronutrient supplementation during pregnancy was effective in reducing the relative risk of low birth weight, small-for-gestational age, and anemia - however, it was as effective as supplementation with iron plus folic acid. The authors discuss the research that demonstrates the effectiveness of multiple micronutrient supplementation on CD4 counts and HIV-related morbidity and mortality in adults. The authors conclude, " The efficacy of MMN varies across trials, but overall there is evidence that outcomes are better than when providing </=2 MN. " -------------------------------------------------------------------------- Summary# 47082 Topic: Dietary Supplementation with Oat Bran May be a Safe and Effective Alternative to Laxative Use Keywords: CONSTIPATION - Fiber, Oat Bran, Fibre, Laxative Reference: " Use of Fiber instead of Laxative Treatment in a Geriatric Hospital to Improve the Wellbeing of Seniors, " Sturtzel B, Elmadfa I, et al, J Nutr Health Aging, 2009; 13(2): 136-9. (Address: I. Elmadfa, University of Vienna, Department of Nutritional Science, Althanstrasse 14, 1090 Vienna. E-mail: ibrahim.elmadfa@... ). Summary: In a double-blind, controlled study involving 30 frail inhabitants of a geriatric hospital aged 57-100 years capable of oral food intake with no swallowing troubles, and taking laxatives, results indicate that dietary supplementation with oat-bran may be a safe and effective alternative to laxatives. The subjects were assigned to consume their daily regular diet supplemented with 7-8 g/d of oat-bran (n=15) or continue with their regular diet with no fiber supplementation, for a period of 12 weeks. By intervention end, 59% of patients in the fiber group had successfully discontinued laxative use, compared with an 8% increase in laxative use in the control group. Additionally, body weight was found to decrease in the control group, while remaining constant in the fiber group. Thus, the authors of this study conclude, " Fiber supplementation is a safe and convenient alternative to laxatives in a geriatric hospital. " -------------------------------------------------------------------------- Summary# 47094 Topic: Calcium Supplementation Improves Insulin Sensitivity in Patients with Type 2 Diabetes Keywords: DIABETES TYPE 2, INSULIN SENSITIVITY, HYPERTENSION, HIGH BLOOD PRESSURE - Calcium Reference: " Insulin sensitivity increase after calcium supplementation and change in intraplatelet calcium and sodium-hydrogen exchange in hypertensive patients with Type 2 diabetes, " Pikilidou MI, Lasaridis AN, et al, Diabet Med, 2009; 26(3): 211-9. (Address: Department of Internal Medicine, Aristotle University of Thessaloniki, AHEPA Hospital, Thessaloniki, Greece. E-mail: m_pikilidou@... ). Summary: In a randomized, controlled, single-blinded, parallel group study involving 31 patients, oral supplementation with 1500 mg/d calcium (Ca(2+)) for a period of 8 weeks was found to improve insulin sensitivity in patients with type 2 diabetes and hypertension, as compared to no treatment. These results suggest that supplementation with calcium may improve insulin sensitivity in type 2 diabetics. -------------------------------------------------------------------------- Summary# 47089 Topic: Micronutrient Supplementation Improves Sleep in Infants Keywords: INFANCY, SLEEP DISRUPTION, IRON DEFICIENCY ANEMIA - Iron, Folic Acid, Zinc, Vitamins, Minerals, Micronutrients Reference: " The Effects of Iron and/or Zinc Supplementation on Maternal Reports of Sleep in Infants from Nepal and Zanzibar, " Kordas K, Siegel EH, et al, J Dev Behav Pediatr, 2009 March 23; [Epub ahead of print]. (Address: Department of Nutritional Sciences, Pennsylvania State University, University Park, PA, USA). Summary: In two randomized, placebo-controlled, parallel design trials involving 877 Pemban infants (from Zanzibar) and 567 Nepali infants, supplementation with iron and zinc were both found to improve sleep duration and reduce nighttime waking. Infants received iron-folic acid supplements with or without zinc for a period of 12 months. Infant sleep duration and waking at night was assessed by the mothers. Supplemental iron was consistently associated with longer night and total sleep duration, and zinc supplementation was also associated with longer sleep duration. The authors conclude, " Micronutrient supplementation in infants at high risk for iron deficiency and iron deficiency anemia was related to increased night sleep duration and less night waking. " -------------------------------------------------------------------------- Summary# 47081 Topic: Vitamin D(3) Supplementation May Improve Postprandial Insulin Sensitivity Keywords: INSULIN RESISTANCE, DIABETES MELLITUS - Vitamin D3, Vitamin D Reference: " A double-blind, randomized, placebo-controlled trial of the short-term effect of vitamin D3 supplementation on insulin sensitivity in apparently healthy, middle-aged, centrally obese men, " Nagpal J, Bhartia A, et al, Diabet Med, 2009; 26(1): 19-27. (Address: Sitaram Bhartia Institute of Science and Research, New Delhi, India). Summary: In a randomized, double-blind, placebo-controlled study involving 71 healthy, middle-aged, centrally obese men, results indicate that supplementation with vitamin D(3) may improve postprandial insulin sensitivity. The subjects were randomized to three doses of 120,000 IU vitamin D(3) or placebo, fortnightly, for a period of 6 weeks. At intervention end, a significant increase in oral glucose insulin sensitivity was observed in the vitamin D(3) group, compared with the placebo group. Thus, the authors conclude, " The trial indicates that vitamin D(3) supplementation improves postprandial insulin sensitivity (OGIS) in apparently healthy men likely to have insulin resistance (centrally obese but non-diabetic). " -------------------------------------------------------------------------- Summary# 47093 Topic: Benefits of Supplementation with Selenium, Vitamin E, Beta-Carotene on Mortality Keywords: MORALITY, CANCER, GASTRIC CANCER - Vitamins, Minerals, Micronutrients, Nutraceuticals, Nutriceuticals, Selenium, Vitamin E, Beta-carotene Reference: " Total and Cancer Mortality After Supplementation With Vitamins and Minerals: Follow-up of the Linxian General Population Nutrition Intervention Trial, " Qiao YL, Dawsey SM, et al, J Natl Cancer Inst, 2009 March 24; [Epub ahead of print]. (Address: Philip R. , MD, ScD, Genetic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 6120 Executive Blvd, Rm 7006, MSC 7236, Bethesda, MD 20892-7236, USA. E-mail: ptaylor@... ). Summary: In this study, authors conducted a 10-year follow-up of 29,584 subjects who from 1985 to 1991 participated in a randomized trial involving the use of supplements containing selenium (50 mug), vitamin E (30 mg), and beta-carotene (15 mg), which was found to reduce mortality from all causes, cancer overall, and gastric cancer. In this study, subjects were followed up with 10 years post-intervention. Results found that subjects who had received the supplement were found to have lower overall mortality (HR=0.95) and lower gastric cancer mortality (HR=0.89), compared to subjects who did not receive the supplement. No significant difference in death from esophageal cancer was found overall, however, in subjects under 55 years of age, mortality decreased by 17% among those who received the supplement (HR=0.83), while it increased 14% among those over 55 years of age. The authors conclude, " The beneficial effects of selenium, vitamin E, and beta-carotene on mortality were still evident up to 10 years after the cessation of supplementation and were consistently greater in younger participants. " -------------------------------------------------------------------------- Summary# 47085 Topic: High Intake of Meat Linked to Increased Mortality Keywords: MORTALITY, LONGEVITY, AGING, CANCER, CARDIOVASCULAR DISEASE - Meat, Red Meat, Processed Meat, Vegetarian, Diet Reference: " Meat intake and mortality: a prospective study of over half a million people, " Sinha R, Cross AJ, et al, Arch Intern Med, 2009; 169(6): 562-71. (Address: Division of Cancer Epidemiology and Genetics, National Cancer Institute-Nutritional Epidemiology Branch, Rockville, MD 20852, USA. E-mail: sinhar@... ). Summary: In a study involving data from half a million people between the ages of 50 and 71 years of age (at baseline), intakes of red meat and processed meats were found to be associated with modest increases in total mortality, cancer mortality, and cardiovascular disease mortality. Over a follow-up period of 10 years, there were 47,976 male deaths and 23,276 female deaths. Overall mortality risk was found to be higher among men and women in the highest quintile of red meat intake (62.5 g per 1000 calories/day) (HR=1.31 and 1.36, respectively), as compared to those in the lowest quintile of red meat intake (9.8 g per 1000 calories/day). Similarly, subjects in the highest quintile of processed meat intake (22.6 g/d) were found to have an increased risk of mortality (HR=1.16 and 1.25), as compared to subjects in the lowest quintile of processed meat intake (1.6 g per 1000 calories/day). In addition, ca rdiovascular disease risk was increased in both men and women in the highest vs. the lowest quintile of red meat intake (HR=1.27 and 1.50, respectively) and processed meat intake (HR=1.09 and 1.38, respectively), as was cancer mortality (HR=1.22 and 1.20, respectively, for red meat intake and 1.12 and 1.11, respectively, for processed meat intake). Intake of white meat, on the other hand, was modestly inversely associated with total mortality, cancer mortality, and death from all other causes in both men and women. These results support recommendations to reduce intake of red meats and processed meats in the diet. -------------------------------------------------------------------------- Summary# 47088 Topic: Plant Food Nutrient Intakes May Reduce the Risk of Prostate Cancer Keywords: PROSTATE CANCER - Plant Food Nutrients, Vitamins, Minerals, Antioxidants, Nutriceuticals, Nutraceuticals, Fiber, Vitamin C, Vitamin A, Alpha-carotene, Beta-carotene, Cryptoxanthin, Folate, Genistein, Daidzein, Fruit, Fruit Juice Reference: " Intake of plant foods and associated nutrients in prostate cancer risk, " JE, Soler-Vila H, et al, Nutr Cancer, 2009; 61(2): 216-24. (Address: Department of Psychiatry and Behavioral Sciences, University of Miami School of Medicine, 1120 NW 14th Street, Miami, FL 33136, USA). Summary: In a study involving 478 men with prostate cancer (373 incident and 105 prevalent cases) and 382 controls, various nutrients from plant foods were found to be associated with reduced risk of prostate cancer. Among Caucasians, incident cases of prostate cancer were found to have lower intakes of fiber, vitamin C, vitamin A, alpha-carotene, beta-carotene, cryptoxanthin, folate, genistein, daidzein, and fruits and/or fruit juices, compared with controls and compared to prevalent cases. Among African-Americans, incident cases were found to have lower intakes of alpha-carotene, compared to controls and prevalent cases. A reduced risk of prostate cancer was found to be associated with the highest tertile of cryptoxanthin (OR=0.51), fiber (OR=0.56), vitamin C (OR=0.60) and fruits and/or fruit juices (OR=0.46). An increased risk of prostate cancer was found to be associated with the highest tertile of protein intake (OR=1.99) and daily servings of grains (OR=1.99). The authors conclude, " The significantly higher consumption of protective dietary constituents among prevalent cases compared to incident cases suggests that PC survivors may be amenable to dietary change. " -------------------------------------------------------------------------- Summary# 47086 Topic: Omega-3 Fatty Acids May Protect Against Prostate Cancer Keywords: PROSTATE CANCER, INFLAMMATION - Omega-3 Fatty Acids, Fish Oil, EPA, DHA, COX-2 gene, Cyclooxygenase-2 Reference: " Dietary Omega-3 Fatty Acids, Cyclooxygenase-2 Genetic Variation, and Aggressive Prostate Cancer Risk, " Fradet V, Cheng I, et al, Clin Cancer Res, 2009; [Epub ahead of print]. (Address: Departments of Urology and Epidemiology and Biostatistics and Institute for Human Genetics, University of California at San Francisco, San Francisco, California, USA). Summary: In a case-control study involving 446 men with aggressive prostate cancer and 478 age- and ethnicity-matched controls, increased intake of long-chain omega-3 polyunsaturated fatty acids was strongly associated with a decreased risk of aggressive prostate cancer (OR=0.37 for the highest vs. lowest quartile of omega-3 PUFA intake). This association was modified by a specific variant (SNP rs4648310) of COX-2 (an inflammatory gene), which has been associated with an increased risk of prostate cancer (OR=5.49, for men with low omega-3 PUFA intake). This increased risk was reversed by increasing intake of long-chain omega-3 PUFAs. The authors conclude, " Our findings support the hypothesis that LC n-3 may impact prostate inflammation and carcinogenesis through the COX-2 enzymatic pathway. " -------------------------------------------------------------------------- Summary# 47084 Topic: Intravenous Supplementation With Omega-3 Fish Oil Emulsion May Benefit Patients With Systemic Inflammatory Response Syndrome Keywords: SYSTEMIC INFLAMMATORY RESPONSE SYNDROME, SEVERE ACUTE PANCREATITIS - Omega-3 Fish Oil Emulsion, Intravenous, Omega-3 Fatty Acids Reference: " Regulation of omega-3 fish oil emulsion on the SIRS during the initial stage of severe acute pancreatitis, " Xiong J, Wang C, et al, J Huazhong Univ Sci Technolog Med Sci, 2009; 29(1): 35-8. (Address: Department of Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China. E-mail: xiongjiongxin2005@... ). Summary: In a prospective, randomized, controlled study involving 60 patients with systemic inflammatory response syndrome (SIRS) during the initial stage of severe acute pancreatitis (SAP), results indicate that intravenous supplementation with omega-3 fish oil emulsion in addition to conventional therapy may exert beneficial effects. The patients were randomized to conventional therapy with or without intravenous supplementation with omega-3 fish oil emulsion (0.2 g/kg/day). Disease severity (APACHE-II scores) significantly decreased in the fish oil group, compared with the control group. In the fish oil group, plasma levels of TNF-alpha and IL-10 significantly decreased, compared with the control group. Thus, the authors of this study conclude, " During the initial stage of SAP, parenteral supplementation with omega-3 fish oil emulsion could efficiently lower the magnitude and persistence time of the SIRS, markedly retrieve the unbala nce of the pro-/anti-inflammatory cytokines, improve severe condition of illness and may provide a new way to regulate the SIRS. " -------------------------------------------------------------------------- Copyright © Vitasearch. All rights reserved. The following information is a reminder of your current mailing list subscription: You are subscribed to the following list: Vitasearch You may automatically unsubscribe from this list at any time by visiting the following URL: http://www.vitagram.com/cgi-bin/dada/mail.cgi/u/vitagram/stardorabellsouth (DOT) net If the above URL is inoperable, make sure that you have copied the entire address. Some mail readers will wrap a long URL and thus break this automatic unsubscribe mechanism. 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