A multicountry ecologic study of risk and risk reduction factors for prostate cancer mortality.
Grant WB.
Eur Urol. 2004 Mar;45(3):271-9.
PMID: 15036670
CONCLUSIONS: These results are consistent with insulin-like growth factor-I (IGF-I), being an important risk factor for prostate cancer, with alcohol and calcium being less important risk factors, and with allium family vegetables, and, to a lesser extent, vitamin D being important risk reduction factors. These results should provide guidance for additional studies on dietary and environmental links to prostate cancer.
A comparison of egg consumption with other modifiable coronary heart disease lifestyle risk factors: a relative risk apportionment study.
Barraj L, Tran N, Mink P.
Risk Anal. 2009 Mar;29(3):401-15. Epub 2008 Nov 4.
PMID: 19000074
DOI: 10.1111/j.1539-6924.2008.01149.x
Guidelines from the American Heart Association (AHA) recommend that healthy adults limit their intake of dietary cholesterol to less than 300 mg per day. Since a large egg contains about 71% of that amount, the AHA recommends restricting egg consumption unless dietary cholesterol intakes from other sources are limited. We applied a risk apportionment approach to estimate the contribution of egg consumption and other modifiable lifestyle risk factors (e.g., smoking, poor diet, minimal exercise, and alcohol intake) to coronary heart disease (CHD) risk at the population level. Specifically, we categorized the U.S. adult population ages 25+ into distinct risk groups based on the prevalence of modifiable lifestyle risk factors and applied an apportionment model, typically used to assess risk contribution at the individual level, to estimate the contribution of egg intake to CHD risk. Our analysis shows that the combination of modifiable lifestyle risk factors accounts for less than 40% of the population CHD mortality. For the majority of U.S. adults age 25+, consuming one egg a day accounts for <1% of CHD risk. Hence, focusing on decreasing egg intake as an approach to modify CHD risk would be expected to yield minimal results relative to changing other behaviors such as smoking and other dietary habits.
The effect of omega-3 FAs on tumour angiogenesis and their therapeutic potential.
Spencer L, Mann C, Metcalfe M, Webb M, Pollard C, Spencer D, Berry D, Steward W, Dennison A.
Eur J Cancer. 2009 Aug;45(12):2077-86. Epub 2009 Jun 1. Review.
PMID: 19493674
Omega-3 fatty acid (omega-3 FA) consumption has long been associated with a lower incidence of colon, breast and prostate cancers in many human populations. Human trials have demonstrated omega-3 FA to have profound anti-inflammatory effects in those with cancer. In vitro and small animal studies have yielded a strong body of evidence establishing omega-3 FA as having anti-inflammatory, anti-apoptotic, anti-proliferative and anti-angiogenic effects. This review explores the evidence and the mechanisms by which omega-3 FA may act as angiogenesis inhibitors and identifies opportunities for original research trialling omega-3 FAs as anti-cancer agents in humans. The conclusions drawn from this review suggest that omega-3 FAs in particular eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) found principally in oily fish have potent anti-angiogenic effects inhibiting production of many important angiogenic mediators namely; Vascular Endothelial Growth Factor (VEGF), Platelet-Derived Growth Factor (PDGF), Platelet-Derived Endothelial Cell Growth Factor (PDECGF), cyclo-oxygenase 2 (COX-2), prostaglandin-E2 (PGE2), nitric oxide, Nuclear Factor Kappa Beta (NFKB), matrix metalloproteinases and beta-catenin
Fish oil-derived fatty acids, docosahexaenoic acid and docosapentaenoic acid, and the risk of acute coronary events: the Kuopio ischaemic heart disease risk factor study.
Rissanen T, Voutilainen S, Nyyssönen K, Lakka TA, Salonen JT.
Circulation. 2000 Nov 28;102(22):2677-9.
PMID: 11094031
Methods and Results-We studied this association in the Kuopio Ischaemic Heart Disease Risk Factor Study, a prospective population study in Eastern Finland. Subjects were randomly selected and included 1871 men aged 42 to 60 years who had no clinical coronary heart disease at baseline examination. A total of 194 men had a fatal or nonfatal acute coronary event during follow-up. In a Cox proportional hazards' model adjusting for other risk factors, men in the highest fifth of the proportion of serum DHA+DPA in all fatty acids had a 44% reduced risk (P=0.014) of acute coronary events compared with men in the lowest fifth. Men in the highest fifth of DHA+DPA who had a low hair content of mercury (2.0 µg/g). There was no association between proportion of eicosapentaenoic acid and the risk of acute coronary events.
Conclusions-Our data provide further confirmation for the concept that fish oil-derived fatty acids reduce the risk of acute coronary events. However, a high mercury content in fish could attenuate this protective effect.
Amsterdam, The Netherlands, May 26, 2009 - There are several risk factors for the development of Alzheimer's disease and vascular dementia. Based on an increasing number of studies linking these risk factors with Vitamin D deficiency, an article in the current issue of the Journal of Alzheimer's Disease (May 2009) by William B. Grant, PhD of the Sunlight, Nutrition, and Health Research Center (SUNARC) suggests that further investigation of possible direct or indirect linkages between Vitamin D and these dementias is needed.
Low serum levels of 25-hydroxyvitamin D [25(OH)D] have been associated with increased risk for cardiovascular diseases, diabetes mellitus, depression, dental caries, osteoporosis, and periodontal disease, all of which are either considered risk factors for dementia or have preceded incidence of dementia. In 2008, a number of studies reported that those with higher serum 25(OH)D levels had greatly reduced risk of incidence or death from cardiovascular diseases
SSeason of diagnosis is a prognostic factor in Hodgkin's lymphoma: a possible role of sun-induced vitamin D.
Porojnicu AC, Robsahm TE, Ree AH, Moan J.
Br J Cancer. 2005 Sep 5;93(5):571-4.
PMID: 16136030
doi:10.1038/sj.bjc.6602722
Epidemiological data for this period indicate that season of diagnosis is a strong prognostic factor for Hodgkin's lymphoma, with approximately 20% lower case fatality for patients diagnosed during autumn vs winter diagnosis (RR = 0.783, 95% CI,-0.62 to 0.99; P = 0.041). Notably, the improved autumnal survival rate was higher than 60% (RR = 0.364, 95% CI, -0.15 to 0.87; P = 0.025) for patients younger than 30 years. This finding may be related to higher endogenous levels of vitamin D in autumn, with a favourable influence on the conventional therapy.
In conclusion, we have found that the prognosis of Hodgkin's lymphoma is significantly correlated with the season of diagnosis, particularly for patients younger than 30 years. This seasonal effect is presumably due to the vitamin D3 synthesis in skin during sun exposure. The present findings should encourage further investigations of the possible adjuvant role of vitamin D derivatives in cancer therapy
Geographic variation of prostate cancer mortality rates in the United States: Implications for prostate cancer risk related to vitamin D.
Grant WB.
Int J Cancer. 2004 Sep 1;111(3):470-1; author reply 472. No abstract available.
PMID: 15221981
10.1002/ijc.20220
The implications of our results and those of Tuohimaa et al.[1] include the following. Vitamin D supplementation should be undertaken in wintertime, a period when it is impossible to produce vitamin D by solar UVB exposure in northeastern states.[13] Given these new results, the optimal vitamin D intake and production and serum 25(OH)-vitamin D3 levels for prostate cancer appear to be lower than for other cancers. However, when developing guidelines for vitamin D fortification, many factors should be included in the analysis, including all of the potential health benefits and possible risks of vitamin D, as well as age, sex, residence, child-bearing status, etc.[14] Also, the suggestion that daily vitamin D3 supplement doses of 100 g (4,000 IU)/day are safe[15] should be reexamined. Finally, in terms of preventing prostate cancer, more attention should be given to diet, which has the greatest environmental impact on risk of prostate cancer, with animal products being important risk factors and vegetable products, especially onions and other allium family members, being important risk-reduction factors.[16]
A comparison of egg consumption with other modifiable coronary heart disease lifestyle risk factors: a relative risk apportionment study.
Barraj L, Tran N, Mink P.
Risk Anal. 2009 Mar;29(3):401-15. Epub 2008 Nov 4.
PMID: 19000074
DOI: 10.1111/j.1539-6924.2008.01149.x
Our analysis shows that the combination of modifiable lifestyle risk factors accounts for less than 40% of the population CHD mortality. For the majority of U.S. adults age 25+, consuming one egg a day accounts for <1% of CHD risk. Hence, focusing on decreasing egg intake as an approach to modify CHD risk would be expected to yield minimal results relative to changing other behaviors such as smoking and other dietary habits.
Dietary composition modulates brain mass and solubilizable Abeta levels in a mouse model of aggressive Alzheimer's amyloid pathology.
Pedrini S, Thomas C, Brautigam H, Schmeidler J, Ho L, Fraser P, Westaway D, Hyslop PS, Martins RN, Buxbaum JD, Pasinetti GM, Dickstein DL, Hof PR, Ehrlich ME, Gandy S.
Mol Neurodegener. 2009 Oct 21;4:40.
PMID: 19845940
doi:10.1186/1750-1326-4-40
INTERPRETATION: Dissociation of Abeta changes from brain mass changes raises the possibility that diet plays a role not only in modulating amyloidosis but also in modulating neuronal vulnerability. However, in the absence of a study of the effects of a high protein/low carbohydrate diet on nontransgenic mice, one cannot be certain how much, if any, of the loss of brain mass exhibited by high protein/low carbohydrate diet-fed TgCRND8 mice was due to an interaction between cerebral amyloidosis and diet. Given the recent evidence that certain factors favor the maintenance of cognitive function in the face of substantial structural neuropathology, we propose that there might also exist factors that sensitize brain neurons to some forms of neurotoxicity, including, perhaps, amyloid neurotoxicity. Identification of these factors could help reconcile the poor clinicopathological correlation between cognitive status and structural neuropathology, including amyloid pathology.
A diet rich in coconut oil reduces diurnal postprandial variations in circulating tissue plasminogen activator antigen and fasting lipoprotein (a) compared with a diet rich in unsaturated fat in women.
Müller H, Lindman AS, Blomfeldt A, Seljeflot I, Pedersen JI.
J Nutr. 2003 Nov;133(11):3422-7.
PMID: 14608053
In conclusion, our results indicate that a coconut oil-based diet (HSAFA-diet) lowers postprandial t-PA antigen concentration, and this may favorably affect the fibrinolytic system and the Lp(a) concentration compared with the HUFA-diet. The proportions of dietary saturated fatty acids more than the percentage of saturated fat energy seem to have a beneficial influence on Lp(a) levels.
The connection between Lp(a) and atherosclerosis is not entirely understood. Different studies have provided strong evidence that Lp(a) level is an independent risk factor for developing coronary artery disease in men (47,48), but the question of causality continues to be debated. Recent data suggest that Lp(a) might be atherogenic (49), in particular when combined with other risk factors. High levels of Lp(a) combined with other risk factors such as the ratio of plasma total/HDL cholesterol have been shown to increase the risk for coronary heart diseases (50). It has also been reported that when substantial LDL cholesterol reductions were obtained in men with coronary heart disease, persistent elevations of Lp(a) were no longer atherogenic or clinically threatening (51).
In conclusion, the present results show that the HSAFA-diet lowered postprandial t-PA antigen and thus potentially improved fibrinolysis compared with the HUFA-diet. Diets with either high or low levels of saturated fatty acids from coconut oil beneficially decrease Lp(a) compared with a HUFA-diet. The proportions of dietary saturated fatty acids more than the percentage of saturated fat energy may be of importance if the goal is to decrease Lp(a).
"Largest-ever meta-analysis finds CRP is unlikely to be causal for CVD
December 21, 2009 | Lisa Nainggolan
Cambridge, UK - In the largest and most comprehensive meta-analysis to date looking at C-reactive-protein (CRP) levels and risk of coronary heart disease (CHD) and stroke, British researchers conclude that CRP is unlikely to be a causal factor for cardiovascular disease [1].
Although CRP concentration was linearly associated with CHD, stroke, and vascular mortality, as well as nonvascular mortality, statistical adjustment for conventional cardiovascular risk factors "resulted in considerable weakening of associations," note the scientists of the Cambridge-based Emerging Risk Factors Collaboration (ERFC), who report their findings online December 21, 2009 in the Lancet.
In an editorial accompanying the paper [2], Drs S Matthijs Boekholdt and John JP Kastelein (Academic Medical Center, Amsterdam, the Netherlands) say the UK authors "are to be commended for this impressive data set." Although the findings "add weight to the evidence of noncausality" for a role of CRP in the development of cardiovascular disease, "the debate can be resolved only by randomized trials with agents that specifically target CRP, and such compounds are currently under development," say the Dutch doctors.
Commenting on the new meta-analysis for heartwire, Dr Paul Ridker (Brigham and Women's Hospital, Boston, MA), a long-time advocate of CRP and the lead investigator of the JUPITER trial, said: "Whether or not CRP is 'causal' for heart disease is neither the crucial issue at hand nor relevant for public health. What is crucial is getting international agreement that CRP identifies higher-risk individuals who would not otherwise qualify for a life-saving therapy, and then showing that such individuals clearly benefit from treatment. The new meta-analysis demonstrates the former, and JUPITER demonstrates the latter." "
"THURSDAY, Dec. 17 (HealthDay News) -- In a surprise finding, Canadian researchers report that the immediate effect of the fish oil fatty acids that are good for the heart is a short-term increase in blood fats and the molecules that help them form clots.
"We were surprised to find that the acute response has some potentially negative effects in comparison to what you might expect from chronic, long-term intake," said Lindsay E. Robinson, an associate professor of nutrition at the University of Guelph, and leader of the group reporting the finding in the January issue of the Journal of Nutrition.
However, the study results shouldn't affect the current recommendation for eating more oily fish to get the omega-3 polyunsaturated acids that reduce the risk of blood clots that can cause heart attacks and stroke, Robinson said.
"The recommendation to increase intake is very well-studied, and this doesn't change it," she said.
And the effects were seen in a selected group of middle-aged men with metabolic syndrome, a combination of high blood pressure, obesity and elevated blood fat levels, Robinson noted.
In the study, eight men had controlled intake of three regimens: high doses of omega-3 fatty acids, low doses of them and just plain water. Robinson and her colleagues measured several blood components involved in clotting, including fats and clotting factors such as plasminogen-activator inhibitor-1 (PAI-1) for the following eight hours.
PAI-1 inhibits the destruction of blood clots, so high levels of it in the blood increase the risk of artery-blocking clots.
The researchers found that both omega-3 fatty acid regimens increased blood fat and clotting factor activity. But the increase in clotting factor was greater for the higher doses of omega-3 fatty acids than for the lower intakes.
Robinson said her group hopes to do further studies of the immediate effects of omega-3 fatty acid intake. "We need to look at the mechanisms, why blood lipid levels go up," she
Marine-derived n-3 fatty acids and atherosclerosis in Japanese, Japanese-American, and white men: a cross-sectional study.
Sekikawa A, Curb JD, Ueshima H, El-Saed A, Kadowaki T, Abbott RD, Evans RW, Rodriguez BL, Okamura T, Sutton-Tyrrell K, Nakamura Y, Masaki K, Edmundowicz D, Kashiwagi A, Willcox BJ, Takamiya T, Mitsunami K, Seto TB, Murata K, White RL, Kuller LH; ERA JUMP (Electron-Beam Tomography, Risk Factor Assessment Among Japanese and U.S. Men in the Post-World War II Birth Cohort) Study Group.
J Am Coll Cardiol. 2008 Aug 5;52(6):417-24.
PMID: 18672160
Conclusions
Very high levels of marine-derived n-3 FAs have anti-atherogenic properties independent of traditional cardiovascular risk factors and may contribute to lower burden of atherosclerosis in Japanese in Japan, which is unlikely due to genetic factors.
A systematic review of the evidence supporting a causal link between dietary factors and coronary heart disease.
Mente A, de Koning L, Shannon HS, Anand SS.
Arch Intern Med. 2009 Apr 13;169(7):659-69. Review.
PMID: 19364995
Conclusions The evidence supports a valid association of a limited number of dietary factors and dietary patterns with CHD. Future evaluation of dietary patterns, including their nutrient and food components, in cohort studies and randomized trials is recommended
Vitamin D deficiency an important, common, and easily treatable cardiovascular risk factor?\nLee JH, O'Keefe JH, Bell D, Hensrud DD, Holick MF.\nJ Am Coll Cardiol. 2008 Dec 9;52(24):1949-56. Review.\nPMID: 19055985
n-3 fatty acids and gene expression.
Deckelbaum RJ, Worgall TS, Seo T.
Am J Clin Nutr. 2006 Jun;83(6 Suppl):1520S-1525S. Review. Erratum in: Am J Clin Nutr. 2006 Oct;84(4):949.
PMID: 16841862
Accumulating evidence in both humans and animal models clearly indicates that a group of very-long-chain polyunsaturated fatty acids, the n-3 fatty acids (or omega-3), have distinct and important bioactive properties compared with other groups of fatty acids. n-3 Fatty acids are known to reduce many risk factors associated with several diseases, such as cardiovascular diseases, diabetes, and cancer. The mechanisms whereby n-3 fatty acids affect gene expression are complex and involve multiple processes. As examples, n-3 fatty acids regulate 2 groups of transcription factors, such as sterol-regulatory-element binding proteins and peroxisome proliferator-activated receptors, that are critical for modulating the expression of genes controlling both systemic and tissue-specific lipid homeostasis. Modulation of specific genes by n-3 fatty acids and cross-talk between these genes are responsible for many effects of n-3 fatty acids.
As explained by Nanny Djaja, dr., Sp.GK, MS, a nutritionist doctor that nutritional factors effect on fertility of a woman or a man aside from other factors.
"There are many different kinds of safety factors that should be adhered to when you are exercising. For instance, it is essential to warm up beforehand and warm down afterwards to prevent muscle and tendon strain and injury. It is also wise to start your exercise regime at the low end of the scale and build up gradually over some weeks, so you don't strain muscles that are weak. However, there are less obvious considerations that are often forgotten when you go off to your exercise class."
"There are many different kinds of safety factors that should be adhered to when you are exercising. For instance, it is essential to warm up beforehand and warm down afterwards to prevent muscle and tendon strain and injury. It is also wise to start your exercise regime at the low end of the scale and build up gradually over some weeks, so you don't strain muscles that are weak. However, there are less obvious considerations that are often forgotten when you go off to your exercise class."
Environmental factors that influence the cutaneous production of vitamin D.
Holick MF.
Am J Clin Nutr. 1995 Mar;61(3 Suppl):638S-645S. Review.
PMID: 7879731
Zittermann A, Schleithoff SS, Tenderich G, Berthold HK, Korfer R, Stehle P.
Low vitamin D status: a contributing factor in the pathogenesis of congestive heart failure?
J Am Coll Cardiol. 2003 Jan 1;41(1):105-12.
PMID: 12570952 [PubMed - indexed for M