bluuebunny/crossref_metadata_2025 huggingface dataset:
Diet quality associated peripheral blood DNA methylation signatures
Authors: Ma Jiantao , Rebholz Casey , Braun Kim , Reynolds Lindsay , Aslibekyan Stella , Voortman Trudy , Fornage Myriam , Levy Daniel
Published: June 2020

Leukocyte DNA methylation patterns associated with habitual diet may reveal molecular mechanisms involved in the pathogenesis of diet-related chronic diseases and highlight targets for prevention and treatment. We aimed to examine peripheral blood derived leukocyte DNA methylation signatures associated with diet quality. We meta-analyzed epigenome-wide associations between diet quality and DNA methylation levels at over 400,000 cytosine-guanine dinucleotides (CpGs). We conducted analysis primarily in 6,662 European ancestry (EA) participants and secondarily in a group additionally including 3,062 participants of non-European ancestry from five population-based cohort studies. DNA methylation profiles were measured in whole blood, CD4 + T-cells, or CD14 + monocytes. We used food frequency questionnaires to assess habitual intake and constructed two diet quality scores: the Mediterranean-style diet score (MDS) and Alternative Healthy Eating Index (AHEI). Our primary analysis identified 32 diet-associated CpGs, 12 CpGs for MDS and 24 CpGs for AHEI (at FDR < 0.05, corresponding p-values = 1.2×10-6 and 3.1×10-6, respectively) in EA participants. Four of these CpGs were associated with both MDS and AHEI. In addition, Mendelian randomization analysis indicated that seven diet-associated CpGs were causally linked to at least one of the CVD risk factors. For example, hypermethylation of cg11250194 (FADS2), which was associated with higher diet quality scores, was also associated with lower fasting triglycerides concentrations (p-value = 1.5×10-14) and higher high-density lipoprotein cholesterol concentrations (p-value = 1.7×10-8). Transethnic meta-analysis identified nine additional CpGs associated with diet quality (either MDS or AHEI) at FDR < 0.05. Overall quality of habitual diet was associated with differential peripheral leukocyte DNA methylation levels of 32 CpGs in EA participants. The diet-associated CpGs may serve as biomarkers and targets for preventive measures in CVD health. Future studies are warranted to examine diet-associated DNA methylation patterns in larger, ethnically diverse study samples.
Postprandial response of the blood metabolome and transcriptome of normal weight and obese men to increasing doses of a meal
Authors: Burnand David , Bütikofer Ueli , Portmann Reto , Walther Barbara , Vergères Guy
Published: June 2020

Introduction

Validation of biomarkers reporting on the intake or bioactivity of foods requests that the dose-response behaviour of relevant nutrients be known. Establishing this relationship is, however, challenging because of the complex composition of foods. In addition, humans respond differently to caloric intake depending on their metabolic health. By allowing the measure of multi-molecular profiles, omics technologies provide better insights into these issues. We have previously measured the response of the blood cell transcriptome of normal weight (NW) and obese (OB) men to increasing caloric doses of a high-fat meal (HFM). We now describe the dose-response of the serum metabolome of these subjects and discuss the results in light of the transcriptomic response.

Material and Methods

In a randomized crossover study, we challenged 19 NW and 18 OB men with 500, 1’000, and 1’500 kcal HFM. The blood cell transcriptome was measured before and 2, 4, and 6 h after meal ingestion. The untargeted serum metabolome was assessed at the same time points. The genes and metabolites responding postprandially in a dose-dependant manner were identified.

Results

Among the 1’385 features with a postprandial response, 178 showed a significant dose-response between meals. A majority of them increased (amino acids, bile salt conjugates, metabolites in urea cycle), whereas circa one fifth, indicative of an endogenous response, decreased (e.g. carnitine esters). Overall, the postprandial metabolome showed caloric saturation, the metabolome after 1’500 kcal HFM being quantitatively only marginally different than after 1’000 kcal. Although a subset of metabolites responded differently to the caloric increase, the postprandial metabolomes of NW and OB subjects were, overall, mostly characterized by their similarity. This finding contrasted with the blood cell transcriptome, which identified a subset of OB subjects whose expression of genes of the oxidative phosphorylation pathway was, compared to the NW subjects, more increased after ingestion of 1’500 kcal HFM.

Discussion

We report, for the first time, the response of the human serum metabolome to increasing caloric doses of a meal. The saturation observed between 1’000 and 1’500 kcal reflects on the control mechanisms regulating the metabolites entering the blood circulation. Interestingly, combining the analysis of the serum metabolome with the blood cell transcriptome indicated that the elevated cellular oxidative response to 1’500 kcal HFM in a subset of OB subjects results from a dysregulation of systemic cellular mechanisms in response to food intake, rather than from changes in gastrointestinal processing.
An in-vitro investigation into the prebiotic potential of xylan derived from the edible red seaweed Palmaria palmata
Authors: Allsopp Philip , Paul Cherry , Strain Conall , Yadav Supriya , Smyth Thomas , Ross Paul , McSorley Emeir , Stanton Catherine
Published: June 2020

Prebiotics are considered beneficial to health owing to positive effects upon the gut microbiota (GM). These effects on the GM include stimulating the growth of beneficial species and increasing short chain fatty acid (SCFA) production (1). Accumulating evidence suggests that the putative health benefits associated with seaweed consumption may be, in part, owing to their effects on the GM(2). The red seaweed Palmaria palmata is a source of xylan, a β(1–3) and β(1–4) D-xylose polysaccharide. Given that xylo-oligosaccharides are a recently accepted prebiotic (3), the aim of this investigation was to assess the prebiotic potential of xylan from Palmaria palmata using an in-vitro fermentation gut model. Fibres were subjected to an in-vitro digestion and underwent in-vitro batch culture fermentation (MicroMatrix) over 24 hours. Fermentation vessels were inoculated using a pooled faecal slurry (5% v/v), prepared from six healthy volunteers. Xylan fibre (n = 4) was compared to Cellulose (negative control, n = 8) and Synergy 1 (positive control, n = 8). Changes to GM composition was determined using qPCR (total bacteria, Lactobacilli, and Bifidobacteria), and MiSeq 16S rRNA sequencing. Short chain fatty acid analysis was conducted using gas chromatography-mass spectrometry. The differential abundance of taxa between fermentation substrates was determined using linear discriminant analysis (LDA) effect size (LEfSe). A permutational multivariate analysis of variance (PerMANOVA) was used to determine statistical differences of beta diversity whilst treatment associated differences of short chain fatty acids were determined using an unpaired Mann-Whitney U Test. Xylan altered GM composition at Phylum, Family and Genus taxonomic levels, notably a significant reduction in the Firmicutes/Bacteroides ratio (p = 0.004). Both 16S sequencing data and qPCR analysis revealed a significant increase in Bifidobacteria relative to cellulose, where the effect was comparable to Synergy 1. No significant differences in microbiota diversity were noted for either Xylan or Synergy 1 in comparison to the cellulose control. Xylan was shown to significantly modulate GM activity through increased short chain fatty acid production with increased acetate, propionate and butyrate. The evidence gained from this study suggests that Xylan from Palmaria palmata is a fermentable fibre with potential prebiotic characteristics, and therefore warrants further investigation in humans.

This research was funded under the National Development Plan, through the Food Institutional Research Measure, administered by the Department of Agriculture, Food and the Marine, Ireland (13/F/511) and a Northern Ireland Department of Education and Learning PhD scholarship to Paul Cherry.
Inadequate iodine intake is associated with subfecundity in mild-to-moderately iodine deficient Norwegian women
Authors: Brantsaeter Anne Lise , Abel Marianne H. , Caspersen Ida H. , Sengpiel Verena , Jacobsson Bo , Magnus Per M. , Alexander Jan , Meltzer Helle Margrete
Published: June 2020

Iodine is an essential micronutrient and an integral part of the thyroid hormones. In women of childbearing age, the estimated average iodine requirement is 95 μg/day and the recommended daily intake is 150 μg/day. While severe iodine deficiency poses reproductive risks, including infertility and abortions, the potential impact of mild-to-moderate iodine deficiency on subfecundity is unknown.

We examined whether iodine intake was associated with risk of subfecundity (i.e. > 12 months trying to get pregnant) in a large cohort of mild-to-moderately iodine deficient women.

Women enrolled in the Norwegian Mother and Child Cohort Study in gestational week 15 were asked to report whether the pregnancy was planned and how many months the couple had sexual relations without any contraception before getting pregnant. Information about time to pregnancy, maternal characteristics and iodine intake was available for 56,416 planned pregnancies. The median (interquartile range) time to pregnancy was 1.5 (0.5–6.0) months and the prevalence of subfecundity was 10.8%). We used iodine intake assessed by a validated food frequency questionnaire administered in pregnancy as a proxy for long-term (pre-pregnancy) iodine intake. We used logistic regression to estimate the association between iodine intake and subfecundity, using flexible modelling with restricted cubic splines, and adjusted for maternal age, BMI, parity, education, smoking status, energy intake and fiber intake. The median calculated iodine intake was 121 μg/day and the median urinary iodine concentration in a subsample of n = 2795 women was 69 μg/L.

The prevalence of subfecundity was lowest for iodine intakes ~100 μg/day and increased at lower intakes (p overall = 0.005). Compared to an intake of 100 μg/day (reference), intakes ~75 μg/day was associated with 5% (95%CI: 1%, 9%) higher prevalence and intakes ~50 μg/day with 14% (95%CI: 4%, 26%) higher prevalence. Use of dietary supplements was recorded only for the last 6 months prior to conception and women were included in the analysis regardless of their reported supplement use. In a sensitivity analysis, we excluding women who reported iodine-containing supplement use in the period 26–9 weeks before conception and the result remained unchanged. We also modelled time to pregnancy by Cox regression, and the result was consistent with the result for subfecundity.

The only good dietary sources of iodine in Norway are milk and white fish, and many women of fertile age have low intakes of these food items. This study shows that low habitual iodine intake may be a risk factor for subfecundity.
Vitamin D and all-cause mortality in older adults > 50 years - data from The Irish Longitudinal Study of Ageing
Authors: McNicholas Triona , Ward Mark , Molloy Anne , Healy Martin , Laird Eamon
Published: June 2020

Background

Low 25-hydroxyvitamin D (25(OH)D) has been linked with adverse health outcomes, including cancer, cardiovascular disease and mortality. The Irish Longitudinal Study on Ageing (TILDA) has previously shown that 13.1% of the Irish population over 50 are deficient in 25(OH)D, after adjusting for seasonality. The aim of this study is to assess whether low 25(OH)D concentrations are associated with all-cause mortality in the over 50s in Ireland.

Methods

Data from Wave 1 (2009–2011) of TILDA, a prospective population representative study of community dwelling adults aged over 50, were used. Blood was obtained during the health assessment, and analysis of 25(OH)D was performed. Mortality was confirmed through official death records, and all participant deaths between baseline and March 2017 were included. Logistic regression assessed whether baseline levels of 25(OH) D, both continuous and categorised into deficient (25(OH)D < 30 nmol/l), insufficient (30 < = 25(OH)D < 50 nmol/l) or sufficient (25(OH)D > = 50 nmol/l), are associated with mortality.

Results

Of the 8,175 over 50s recruited, 25(OH)D data was available for 5,388 participants. Of these, 366 individuals had died prior to March 2017. Higher concentrations of 25(OH)D were associated with lower odds of mortality (OR 0.70; 95% CI 0.60, 0.81, p-value), controlling for confounders. On categorising 25(OH)D, those with insufficient 25(OH)D concentrations had higher odds of mortality than those with sufficient levels (OR 2.04; 95% CI 1.48, 2.8; p-value < 0.001). Stratifying between men and women, there was no gender difference in this association.

Conclusion

Insufficient baseline 25(OH)D concentrations are associated with an increased odds of all-cause mortality in community dwelling adults over 50 in Ireland. Further research evaluating whether treatment of vitamin D deficiency improves mortality is warranted.
Meat intake and cancer risk: prospective analyses in UK Biobank
Authors: Knuppel Anika , Papier Keren , Appleby Paul N. , Key Timothy J. , Perez-Cornago Aurora
Published: June 2020

Introduction

Meat intake is thought to play a role in the risk of cancer. The Third Expert Report of the World Cancer Research Fund/American Institute for Cancer Research concluded that red meat was a probable cause and processed meat a convincing cause of colorectal cancer. However, evidence for associations between red and processed meat intake and other cancer sites is limited. Furthermore, few studies have investigated the association between poultry intake and cancer risk. Therefore, this study aimed to examine the associations between red, processed meat and poultry intake and incidence for 20 common cancer sites.

Material and methods

We analysed data from 475,264 participants (54 % women) in UK Biobank. Participants were aged 37–73 years and cancer free at baseline. Cancer diagnosis and death due to cancer without prior diagnosis during follow-up were determined using data-linkage with cancer and death registries (with follow-up until 31 March 2016 for England and Wales and until 31 October 2015 for Scotland, respectively). Information on meat consumption was based on a touchscreen questionnaire completed at baseline covering type and frequency of meat intake. We used multivariable-adjusted Cox proportional hazards models to determine the association between baseline meat intake and cancer incidence. Analyses of lung cancer risk were restricted to never smokers. All analyses were adjusted for socio-demographic, lifestyle and women-specific factors.

Results

Over a mean 6.9 (SD 1.3) years of follow-up, 28,431 participants were diagnosed with any type of cancer. Red meat intake was positively associated with risk for colorectal cancer (n cases = 3,164; Hazard ratio (HR) per 50 g/day higher intake 1.22, 95% Confidence Interval (CI) 1.05–1.41), breast cancer (n cases = 5,536; 1.12, 1.01–1.24) and prostate cancer (n cases = 5,807; 1.16, 1.03–1.30). Processed meat intake was positively associated with risk for colorectal cancer (n cases = 3,189; HR per 20 g/day higher intake 1.17, 95% CI 1.06–1.30). Poultry intake was positively associated with risk for cancers of the lymphatic and hematopoietic tissues (n cases = 2,431; HR per 30g/day increment in intake 1.16, 95%-CI 1.03, 1.32).

Discussion

In summary, higher intakes of red and processed meat were associated with a higher risk of colorectal cancer. Red meat consumption was also positively associated with risk of breast and prostate cancer, but these associations are not supported by most previous prospective studies. The positive association of poultry intake with cancers of the lymphatic and hematopoietic tissues requires further investigation.
Public acceptability of government interventions to reduce obesity: policy effectiveness, policy fairness, government trust and political ideology
Authors: Gunarathne Anoma , Spiller Achim , Risius Antje
Published: June 2020

Frequent consumption of sugar-sweetened beverages (SSBs) has been linked to a greater risk of obesity, type 2 diabetes mellitus, dental caries and coronary heart disease. SSBs are an ideal target for public health intervention to help control the type 2 diabetes mellitus epidemics since they have absolutely no nutritional value, and do not protect against disease. However, successful implementation of policies to reduce consumption of SSBs depends on public acceptability and support. Therefore, determining the public acceptability of government interventions to reduce sugar-sweetened beverages is critical for effectiveness as well as implementation. The aim of the present study was to conduct an empirical investigation of how different policy-related factors (namely perceived policy effectiveness, perceived policy fairness, policy trust and political ideology) link to public support. Policy options included low, medium and high intensity versions of: imposing a tax (10%, 20% and 30%); adding a warning label (with and without graphic warning label); reducing number of SSB retail outlets (schools only and all public institutions); and regulating SSB advertising (ban advertising aimed at children and ban all SSB advertising). Data were collected from a representative sample of 948 consumers (age range from 18 to 69) through an online survey, which was carried out in February 2019. Sample quotas were set for age, gender and income. The partial least squares approach of the structural equation modelling (PLS-SEM) is employed to investigate direct effects of the proposed factors on public acceptance. Importantly, the results indicate that perceived fairness and perceived effectiveness of the political interventions had a significantly positive correlation with public acceptance (β = 0.518, p-value < 0.001 and β = 0.299, p-value < 0.001, respectively). Meanwhile, those who have a greater trust in government are more likely to support (β = 0.049, p-value < 0.05). Also, public acceptance is positively associated with liberal policy strains. This is in line with social cognitive motives such as openness to new experiences and desire for equality in society. Moreover, higher trust in government is positively associated with perceived fairness as well as perceived effectiveness. These findings reflect that those who trust government believe that the government policy is fair in terms of the policy itself, how it is established as well as its specific distributive effects. Therefore, participatory policymaking that involves the public in the decision-making process can enhance citizens’ trust and overall acceptance in policy interventions with regard to SSBs.
Effects of obesity and weight loss on microRNA expression in the human colorectal mucosa
Authors: Breininger Stella , Sabater Laura , Malcomson Fiona , Afshar Sorena , Mann Jelena , Mathers John
Published: June 2020

Introduction

Colorectal cancer (CRC) is the 3rd most common cancer worldwide. Obesity, and its lifestyle determinants, physical inactivity and poor diet, increase CRC risk. However, the effects of weight loss by bariatric surgery on CRC risk are unclear. Epigenetic mechanisms involving microRNAs that lead to dysregulated gene expression may mediate the effects of obesity and weight loss on CRC risk. We hypothesised that microRNAs are i) aberrantly expressed in obese individuals compared with healthy non-obese individuals and ii) modulated by significant weight loss following bariatric surgery.

Methods

We used data and samples from the Biomarkers of Colorectal Cancer after Bariatric Surgery (BOCABS) Study. Obese patients listed for bariatric surgery and age- and sex-matched healthy non-obese adults (Controls) were recruited at North Tyneside General Hospital. Rectal mucosal biopsies were collected at baseline and six months post-surgery from obese participants and at baseline only from Controls. Using Next Generation Sequencing and bioinformatics analysis, a panel of 8 microRNAs was selected and validated by quantitative PCR in colorectal mucosal biopsies.

Results and discussion

Data were available for 20 control participants and for 22 obese participants with matched pre- and post-surgery samples. Next Generation Sequencing revealed that compared with non-obese individuals, obese individuals showed differential expression of 112 microRNAs (p < 0.05). Roux-en-Y gastric bypass, resulted in differential expression of 60 microRNAs, when compared with expression levels at baseline (p < 0.05). A total of 36 microRNAs differed significantly in both i) the obese with non-obese and ii) the pre- and post-surgery comparisons. Validation by quantitative PCR demonstrated that expression of miR-31, miR-215, miR-3196 and miR-4516 was significantly (P < 0.05) higher in obese than in non-obese individuals. Weight loss, (mean 28.5kg) following Roux-en-Y gastric bypass, reduced expression of miR-31, miR-215 and miR-3196 significantly (P < 0.05) to expression levels that were comparable with those in Controls. These differentially expressed microRNAs are implicated in pathways linked with inflammation, obesity and cancer.

Conclusion

The pattern of microRNA expression in macroscopically-normal human colorectal mucosa differed substantially between obese and non-obese individuals. However, six months after Roux-en-Y gastric bypass, the pattern of microRNA expression was similar to that in non-obese Controls. This suggests that surgically-induced weight loss may normalise microRNA expression in the human colorectal mucosa and so reduce CRC risk.
Sarcopenia in older black South African women and relationships with physical activity and protein intake
Authors: Mendham Amy E. , Brooks Naomi E. , Micklesfield Lisa K. , Faber Mieke , Christensen Dirk L. , Gallagher Iain J. , Lundin-Olsson Lillemor , Myburgh Kathryn H. , Kalula Sebastiana , Odunitan-Wayas Feyisayo , Lambert Estelle V
Published: June 2020

Introduction

South Africa (SA) is a developing country with an ageing population. Adequate nutrition and physical activity (PA) protect against the loss of muscle mass and physical function, both of which are important components of sarcopenia. This study aimed to measure the prevalence of sarcopenia in older black SA women and investigate its associations with PA and protein intake.

Materials and Methods

Older black SA women (age, 68 (range; 60–85 years) n = 122) completed sociodemographic questionnaires, 24 h urine collection (estimate protein intake), venous blood (hs-C-reactive protein (hs-CRP) and ferritin), functional tests (grip strength, 3 m timed-up-and-go (TUG), 10 m walk test) and PA monitoring (activPAL). Dual-energy x-ray absorptiometry whole-body scans assessed fat and fat-free soft tissue mass (FFSTM).

Results

According to the European Working group on Sarcopenia in Older People (EWGSOP)2, 2.5% (n = 3) had confirmed sarcopenia of a low severity based on normal physical function. Of the total cohort, 9% (n = 11) had low grip strength, 22.1% (n = 27) had a low appendicular skeletal muscle index (ASMI), and no women had low TUG (s) or gait speed (m/s). Higher ASMI was associated with lower hs-CRP (p = 0.05; Rho = -0.209) and higher ferritin (Rho = 0.252; p = 0.019), grip strength (kg, Rho = 0.223; p = 0.015), and gait speed (m/s, Rho = 0.180; p = 0.050). Protein intake suggested intake of 41.8g/day/ or 0.51 g/kg of body mass/day. Higher total protein intake (g/24h), was associated with higher FFSTM (kg) and ASMI (p < 0.001). PA outcomes were not correlated with FFSTM or ASMI (p > 0.05), however, there was a strong positive correlation of TUG (s) and gait speed (m/s) with time spent: 1) stepping per day (min) and; 2) at a high cadence (> 100 steps/min) (all p < 0.01). Daily step count was 7137 ± 3233 (mean ± Standard deviation), with 97.9 ± 38.7 min of total time spent stepping and 12.6 ± 16.8 min spent stepping at a high cadence (> 100 steps/min). Of note, 13.9% (n = 17) of women were completing > 10,000 steps/day.

Discussion

Based on the EWGSOP2 criteria, there is a low prevalence of sarcopenia in older black SA women, explained by the maintenance of strength and physical function that directly related to PA, especially that performed at higher intensities. In contrast, low muscle mass was relatively prevalent (22.1%) and was associated with low dietary protein and not PA. Notably, it may be important to review the cut-points of EWGSOP2 criteria to be specific to the older SA women from disadvantaged communities.
Changes in dietary preferences reported in pregnancy: associations with later pregnancy complications in a sample of 55,087 women
Authors: Bjerregaard Anne Ahrendt , Christiansen Ann-Marie Hellerung , Christensen Dirk Lund , Olsen Sjurdur Frodi
Published: June 2020

Introduction

Dietary changes in pregnancy may be a marker for later pregnancy complications. This study aims to investigate if there is a difference in the proportion of women who experience specific pregnancy related complications vs those who do not, in relation to specific dietary changes made during pregnancy.

Materials and methods

Within the Danish National Birth Cohort, established during 1996 and 2003, dietary changes from 70,053 pregnancies were assessed in gestational week (GW) 25 using two open-ended questions (q1 and q2) on aversions or preferences appended to a 350-item food frequency questionnaire; “did you stop(q1) or start(q2) consuming a specific food during pregnancy?” After restricting to the firstborn child enrolled, born at term (GW 37 + 1–42 + 0) with a birth weight between 1,0 and 6,0 kilograms, excluding multiple pregnancies and abortions, dietary change answers from 55,087 women were coded into 65 food groups. Using chi-X2 test, we compared proportions of women with and without three pregnancy complications: preeclampsia (obtained via linkage to the Danish National Patient Registry), children born small-for-gestational-age (SGA, < 10th percentile) or children born large-for-gestational-age (LGA, > 90th percentile) with respect to their answers about aversions/preferences.

Results

Among the 55,087 women, 49% and 31% reported any aversions or preferences, respectively. Most frequent were women reporting aversion of alcohol (22.7%) or coffee (15.4%), and preference of milk products (7.9%) or fruits and berries (6.9%), which were selected a priori for analyses. 8.3% of women experienced preeclampsia, and 9.7% and 9.3% of children were characterizes as being born SGA or LGA, respectively. Compared with no dietary change: avoiding alcohol or coffee was associated with smaller proportion of SGA (10% vs 8%, p = 0.01 and 10% vs 7%, p < 0.0001) and avoiding coffee was also associated with greater proportion of LGA (9% vs 11%, p = 0.01). Increasing milk products or fruit/berries was associated with smaller proportions of SGA (14% vs 10% in both conditions, p < 0.009). No significant association in reported aversions/preferences was detected for preeclampsia.

Discussion

The results lead to additional questions, such as “Why do women who increase consumption of milk products or fruits/berries tend to deliver SGA infants and why do women who stop drinking coffee tend to deliver LGA infants?” The presented results and further analyses are important to public health initiatives for optimizing maternal nutrition with long-term influence to offspring Health.
Associations between methylmercury, n-3 polyunsaturated fatty acids and antinuclear antibodies in young adults from the Seychelles Child Development Study (SCDS).
Authors: McSorley Emeir M. , Mulhern Maria S. , Yeates Alison J. , Harrington Donald , van Wijngaarden Edwin , Thurston Sally W. , Jusko Todd A. , Spence Toni , Davidson Philip W. , Myres Gary J. , Watson Gene E. , Shamlaye Conrad F. , Strain J.J.
Published: June 2020

The association of MeHg exposure through fish consumption on human autoimmunity remains unclear. Fish also contain n-3 long chain polyunsaturated fatty acids (LCPUFA) that are known to regulate inflammation and mitigate autoimmune disease symptoms. We studied the association of low-level exposure to methylmercury (MeHg) through fish consumption in the SCDS. We examined this association at age 19 years in the SCDS Main Cohort (n = 497). We measured MeHg exposure at 3 time points [prenatal, weighted average (6 months to 19 years) and concurrent (19 years) and LCPUFA status and a panel of 13 autoimmune markers at age 19 years. The autoimmune markers included antinuclear antibodies (ANA), anti-dsDNA and anti-RNP, and total (non-specific) immunoglobulins (Ig) IgG, IgA, and IgM. A combined ANA variable was also calculated based on being within or above reference range for any of the ANA markers; 56% of the subjects met this criterion. Multivariable regression models adjusted for prenatal MeHg, sex and waist circumference, with and without adjustment for LCPUFA, were fit for the three MeHg exposure metrics and each immune marker. Mean (SD) prenatal, weighted average and concurrent MeHg was 6.84 (4.55), 7.46 (2.82), and 10.23 (6.02) ppm, respectively. Combined ANA was positively associated with concurrent MeHg following adjustment for the n6:n3 LCPUFA ratio (β = 0.036, 95%; CI: 0.001, 0.073). Prenatal and average MeHg exposures were not significantly associated with any individual ANA. IgM was negatively associated with concurrent (β = -0.016, 95%CI: -0.016, -0.002), and average (β = -0.042, 95%CI: -0.042, -0.009) MeHg exposure in the models adjusted for n-3, n-6 LCPUFA and when separately adjusted for the n6:n3 LCPUFA ratio. Total (19-year) n-3 PUFA status was negatively associated with anti-RNP (β = -20.355, 95%CI: -36.89, -4.34) and IgG (β = -1.384, 95%CI: -2.682, -0.087). Total n-3 LCPUFA was associated with lower markers of autoimmunity. MeHg exposure at 19 years was associated with higher ANA and lower IgM but only following adjustment for LCPUFA. The clinical significance of these findings is unclear and further research is warranted to determine if these associations precede autoimmune disease development.
Associations between yogurt consumption and nutrient intake in the United Kingdom
Authors: Zhu Yong , Smith Jessica , Jain Neha , Vanage Vipra , Sharma Mitesh , Holschuh Norton , Agler Anne Hermetet
Published: June 2020

Introduction: The present study was conducted to examine yogurt consumption patterns and investigate associations between yogurt consumption and nutrient intake using data from the National Diet and Nutrition Survey (NDNS) rolling programme in the United Kingdom.

Materials and Methods: Children aged 1.5–18 years old (N = 2564) and adults aged 19 years or older (N = 2705) from the NDNS 2012/13–2015/16 were included in the study. The average of four-day food diary data was used for analysis. Yogurt included all food items from the yogurt, fromage frais and dairy dessert food group, excluding dairy dessert products. Participants were classified as yogurt eaters if they reported consumption of yogurt at least once during the four days. Percentage contribution of yogurt to daily intake of nutrients in yogurt eaters was calculated. Multiple linear regression analyses for surveys were used to compare differences in energy and nutrient intake between yogurt eaters and non-eaters, adjusting for sociodemographic characteristics. Energy intake was also adjusted for in nutrient data analysis.

Results: The prevalence of yogurt consumption was 53% in children and 39% in adults. The daily intake of yogurt was 105 g and 132 g, respectively. Yogurt is an important source of calcium and riboflavin in children and adults, as well as vitamin D in children, accounting for over 15% of daily intake of these nutrients. Compared to non-eaters, yogurt eaters had significantly higher energy intake in both children and adults; they also had significantly higher intake of protein, fiber, calcium, magnesium, phosphorus, potassium, folate, riboflavin, thiamin, and vitamin C, as well as significantly lower intake of sodium. Child yogurt eaters also had significantly higher intake of vitamin A and vitamin B12, and lower intake of total fat, whereas adult yogurt eaters had significantly higher intake of carbohydrate, iron, zinc, vitamin D and vitamin E, compared to non-eaters. Both yogurt eaters in children and adults had higher intake of total sugar; nonetheless, non-milk extrinsic sugar intake did not differ by yogurt consumption status in children, and it was significantly lower in adult yogurt eaters. Saturated fat intake did not differ by yogurt consumption status in children and adults.

Discussion: Yogurt is an important dietary source of several nutrients in the United Kingdom. Its consumption was positively associated with intake of total energy and many nutrients to encourage, but not positively associated with intake of sodium, total fat, saturated fat, and non-milk extrinsic sugar in both children and adults.
The water-scarcity footprint of Australian adult diets – evidence from a large population health survey
Authors: Ridoutt Bradley , Baird Danielle , Anastasiou Kimberley , Hendrie Gilly
Published: June 2020

The food system is responsible for around 70% of global freshwater use. Pathways toward responsible consumption and production of food are therefore critically needed to ensure the planetary boundary for freshwater use is not transgressed. There is also an uneven spatial distribution of freshwater resources and human water demands, meaning that water-scarcity is acute in some regions but a lesser concern in others. Quantifying the water-scarcity impacts associated with food consumption is therefore a complex challenge due to the diversity of individual eating patterns, the very large number of individual food products available, and the many different regions where food is grown or processed. To our knowledge, this is the first study to calculate water footprints for a large number of self-selected diets. Life cycle assessment was used to model the water-scarcity footprints of 9,341 individual Australian adult diets obtained through 24-hour recall as part of the most recent Australian Health Survey. Three water-scarcity indicators were used, including the AWARE model recently developed by a project group working under the auspices of the United Nations Environment Programme (UNEP) / Society of Environmental Toxicology and Chemistry (SETAC) Life Cycle Initiative (www.lifecycleinitiative.org). In addition, a diet quality score was calculated for each of these diets. Our objective was to identify pathways toward healthier diets with lower water-scarcity impacts. Dietary water-scarcity footprints averaged 362 L-eq person-1 day-1 and were highly variable (sd. 218 L-eq person-1 day-1), reflecting the diversity of eating habits in the general community. The largest water-scarcity impacts were related to the excessive consumption of discretionary foods (alcoholic beverages, processed meat products, dairy desserts, cream, butter, muesli bars, confectionery, chocolate, biscuits, cakes, waffles, fried potato and extruded snacks, etc.). The potential to reduce dietary water-scarcity impacts is large, although the opportunity to intervene through amended dietary guidelines is not straightforward due to the large variations in water-scarcity footprint intensity between individual foods within a food group, and the inability of consumers to identify lower water-scarcity footprint products without food labeling. Reductions in the water-scarcity footprint of Australian food consumption are likely best achieved through reductions in food waste, technological change to improve water-use efficiency in food production, as well as the implementation of product reformulation and procurement strategies in the food manufacturing sector to avoid higher water-scarcity footprint intensity ingredients.
Influence of the Mediterranean diet on the production of short-chain fatty acids in women at risk for breast cancer (LIBRE)
Authors: Seethaler Benjamin , Beutel Jacqueline , Kogel Marie , Basrai Maryam , Walter Jens , Laville Martine , Neyrinck Audrey M. , Delzenne Nathalie M. , Kiechle Marion , Bischoff Stephan C
Published: June 2020

Background: A number of small intervention studies suggested that a Mediterranean diet (MedD) and physical activity can lower the risk for breast cancer. LIBRE is the first large multicenter RCT to test the effect of these lifestyle factors on the incidence of breast cancer in women at risk because of BRCA mutations(1). LIBRE also offers to unravel underlying mechanisms such as the role of short-chain fatty acids (SCFA) for beneficial effects of such lifestyle interventions.

Methods: We examined the effect of the lifestyle intervention on the production of SCFA measured in feces by gas chromatography. From the ongoing LIBRE trial we included all complete datasets (171 women; mean age 44 ± 11 years). Both women with and without previous breast cancer diagnosis were recruited (diseased; non-diseased). The participants were randomized into an intervention group (IG) trained for MedD and physical activity, and a usual care control group (CG). Adherence to the MedD was assessed at baseline and after 3 months (V1) using the validated Mediterranean Diet Adherence Screener (MEDAS) and the EPIC food frequency questionnaire (FFQ).

Results: At baseline there was no difference in SCFA levels between the groups. In the IG the MEDAS score increased substantially by 2.5 points (p < 0.001), in the CG only mildly by 0.4 points (p < 0.05). Correspondingly, the intake of fibers increased solely in the IG. In the course of the study the amount of caproic acid decreased in the control group (p < 0.001). At V1 non-diseased women showed higher amounts of acetic acid (p = 0.042), n-butyric acid (p = 0.023), n-valeric acid (p = 0.018) and iso-valeric acid (p = 0.031). There were several correlations between the intake of different fibers and fecal SCFA. For example, the sum of poly- and oligosaccharides correlated with acetic acid (p = 0.001; r = 0.316), propionic acid (p = 0.034; r = 0,251), n-butyric acid (p = 0.010; r = 0.316) and iso-valeric acid (p = 0.012; r = 0.306). There was no correlation between the MEDAS and SCFA.

Discussion: A lifestyle change towards a MedD and increased physical activity did not change the levels of SCFA in feces, although an increase of fiber intake was documented in the IG. To further analyze SCFA metabolism in this target population, gut microbiota composition and function (metabolites) are currently analyzed.
Effect of Maternal Nonalcoholic Fatty Liver Disease and Dietary Choline Status on Body Mass and Lipid Profile in Rat Offspring
Authors: Mikołajczyk-Stecyna Joanna , Żuk Ewelina , Olszyński Krzysztof , Celichowski Piotr , Ruciński Marcin , Chmurzynska Agata
Published: June 2020

Both maternal metabolic status and nutrition during pregnancy and lactation may have a programming effect on offspring metabolism. The aim of this study was to examine the role of the dietary choline supply during pregnancy and lactation in rat dams suffering from nonalcoholic fatty liver disease (NAFLD) on body weight and plasma lipid profile of the progeny.

The research protocol was approved by the local ethics committee. The study groups included the offspring of 1. healthy dams receiving choline during pregnancy and lactation (the control group); 2. NAFLD dams receiving choline during pregnancy and lactation (NN); 3. NAFLD dams receiving choline during pregnancy and a choline-deficient diet during lactation (ND); 4. NAFLD dams receiving a choline-deficient diet during pregnancy and a supply of choline during lactation (DN); and 5. NAFLD dams receiving a choline-deficient diet during both pregnancy and lactation (DD). Body mass and plasma lipid profile were assessed in male and female rats from each group on day 3 (3d), day 24 (24d), and day 90 (90d).

Body mass was significantly lower in the male offspring of the DD and DN groups than in the control group. Differences were observed at all times (3d: p = 0.0023; 24d: p < 0.0001; 90d: p < 0.0001). Moreover, body mass was significantly higher in the male offspring of the control group than in any other group. In the female progeny, body mass was higher in the control group than in the ND (24d: p < 0.0001; 90d: p = 0.0067) or NN (24d: p = 0.0058) groups.

Total plasma cholesterol concentration was higher in the 90d males of the control group than in the DD group (p = 0.0163) and in the 24d females of the NN group than in the ND group (p = 0.0495). In the 3d animals, LDL was higher (p = 0.0083) but HDL was lower (p = 0.0196) in male rats of the DD and DN groups than in the NN and ND groups. Neither age nor sex affected LDL levels. The plasma levels of triglycerides were not affected by the dietary regimen, sex, or age of the animals.

Maternal NAFLD and dietary choline status during pregnancy and lactation affect body mass and lipid profile in rat offspring, and the effects of maternal programming are more pronounced in male offspring than in female.

The project was financed by the National Science Centre, Poland (2016/21/D/NZ9/00360).
Sociodemographic and family correlates of dietary-lifestyle patterns in young men: cross-sectional study (MeDiSH Project)
Authors: Lonnie Marta , Wadolowska Lidia , Kowalkowska Joanna , Bandurska-Stankiewicz Elzbieta
Published: June 2020

The aim of this study was to identify the sociodemographic and family correlates associated with dietary and lifestyle patterns in young men. In all, 367 men from the Warmia and Mazury region (Poland), aged 19–40 years old participated in the study. Data regarding sociodemographic, family status, dietary and lifestyle characteristics were collected through structured interviews using food frequency questionnaire KomPAN (Jezewska-Zychowicz et al. 2018, http://www.knozc.pan.pl). Dietary and lifestyle patterns were derived using Principal Component Analysis (PCA). In total, 25 dietary and 6 lifestyle standardised variables were included in the PCA. The associations were verified using logistic regression. Four DLPs were derived, explaining 33% of the variance. Men from the upper tertile of “Protein food, fried-food and recreational physical activity” pattern (characterised by frequent intake of white meat, white rice, eggs, red meat, fried food, groats, higher number of meals a day and recreational activity) were more likely to be under 30 years old (odds ratio, OR = 2.20, 95% confidence interval, 95%CI: 1.30–3.70) than men from the bottom tertile. Men from the upper tertile of “Sandwiches and convenience foods” pattern (characterised by frequent intake of cold meats and smoked sausages, white bread, butter, cheese, sweets and tinned meat) were more likely to be in a relationship (1.95, 1.14–3.34) than men from the bottom tertile. Men from the upper tertile of “Fast foods and stimulants” pattern (characterised by frequent intake of sweetened beverages, energy drinks, alcohol, fast foods, and smoking currently or/and in the past) were more likely to be under 30 years old (2.46, 1.46–4.14), to live in towns and rural areas (2.07, 1.21–3.55) and to have lower educational level (2.01, 1.20–3.36) in comparison to men from the bottom tertile. Men from the upper tertile of “Healthy diet, activity at work, former smoking” pattern (characterised by frequent intake of fruit, vegetables, fermented milk products, wholegrain bread, fish, cottage cheese, milk, groats, legumes, higher number of meals a day, physical activity at work and smoking in the past) were more likely to work physically (2.06, 1.22–3.47) and be in a relationship (1.93, 1.12–3.32). Sociodemographic and family correlates were strongly associated with dietary and lifestyle patterns, both healthy and unhealthy, in our sample of young men. The results demonstrate that diet and lifestyle interventions should be particularly targeted at men under 30 years old, those living in small towns and rural areas and with lower educational level.
Diet and physical activity as determinants of weight gain, overweight and obesity: The WCRF/AICR evidence and policy implications
Authors: Bandurek Isobel , Almond Emily , Brown Susannah , Mitrou Giota , Bourgiezi Ifigeneia , Brockton Nigel , McGinley-Gieser Deirdre , Wiseman Martin , Sing Fiona , Leitzmann Michael , Allen Kate
Published: June 2020

Introduction

Globally, over 1.97 billion adults and 338 million children and adolescents are living with overweight and obesity, increasing the risk of numerous co-morbidities, including at least 12 cancers(1). WCRF/AICR conducted a literature review of diet and physical activity as determinants of weight gain, overweight and obesity in adults and children. We also introduce a novel evidence-based policy framework for promoting physical activity, and linked database, currently in development as part of the EU-funded CO-CREATE project on child and adolescent obesity prevention.

Materials and Methods

Evidence on diet and physical activity as determinants and risk of weight gain, overweight and obesity was systematically extracted from existing reviews and a systematic search for recent meta-analyses, then collated and analysed. The WCRF Continuous Update Project Expert Panel drew conclusions about which exposures influence risk of weight gain, overweight and obesity, using pre-defined criteria that included evidence of biological plausibility.

Results

The Panel identified strong evidence that several diet and physical activity related exposures influence the risk of weight gain, overweight and obesity in adults and children (see table 1). Separate conclusions were drawn for adults and children in relation to screen time, considered a marker of sedentary time.

However, the Panel noted that as exposures tend to cluster, physiologically interact and share common biological mechanisms, they should not be regarded as absolutely ‘singular'but an integrated concept of interrelated exposures within a pattern of lifestyle.
Table 1.

Risk of weight gain, overweight and obesity

STRONG EVIDENCEDECREASES RISKINCREASES RISKCONVINCINGWalkingScreen time (children)
Sugar sweetened drinksPROBABLEAerobic physical activity
Foods containing dietary fibre
‘Mediterranean type’ dietary pattern
Having been breastfedScreen time (adults)
‘Fast foods’
‘Western type’ diet

For full list of footnotes, see Energy Balance and Body Fatness report(1).

Discussion

Healthy dietary patterns help prevent excess weight gain. Achieving such patterns requires attention to the broader economic, environmental and social factors that influence and constrain people's behaviour. The findings of this report support the need for evidence-based public health policy to help create health-enabling environments, particularly for children and adolescents. The WCRF International MOVING framework(2) presents a package of policies to promote physical activity, which alongside wider public health policy can help address the multiple drivers of overweight and obesity.