Serum Omega-3 Research Articles

Association of dietary intake and serum concentration of omega-3 fatty acids on celiac disease: evidence from observational study and Mendelian randomization.

The association between omega-3 fatty acids (O3FA) and celiac disease lacks sufficient investigation. Utilizing data gleaned from the 2009 to 2014 National Health and Nutrition Examination Survey (NHANES), this research comprises a sample of 13 403 adults, each aged 20 years and above. We conducted a multivariable logistic regression analysis to assess the association between dietary intake of O3FA and celiac disease. Subsequently, a two-sample Mendelian randomization was performed to estimate the unconfounded causal relationship between serum O3FA and celiac disease. The principal analytical strategy utilized the inverse-variance weighted methodology. In this cross-sectional study, 48 occurrences (0.36%) of celiac disease were encompassed. In the multivariable model, there was no association between dietary intake of O3FA and cases of celiac disease (odds ratio: 1.12, 95% confidence interval: 0.47-2.66, P = 0.792). However, serum levels of O3FA determined by genetic assay were correlated with celiac disease (inverse-variance weighted, β = 0.2439, P = 0.0287), with no evidence of horizontal pleiotropy ( P = 0.3689). The dietary consumption of O3FA did not exhibit an association with the risk of celiac disease in this cross-sectional investigation. However, a correlation between celiac disease and serum levels of O3FA was observed in the Mendelian randomization. Further investigations, including human clinical trials, are warranted.

The kynurenine and serotonin pathway, neopterin and biopterin in depressed children and adolescents: an impact of omega-3 fatty acids, and association with markers related to depressive disorder. A randomized, blinded, prospective study.

https://www.isrctn.com/ISRCTN81655012, identifier ISRCTN81655012.

Hair mercury isotopes, a noninvasive biomarker for dietary methylmercury exposure and biological uptake.

Background. Fish and rice are the main dietary sources of methylmercury (MeHg); however, rice does not contain the same beneficial nutrients as fish, and these differences can impact the observed health effects of MeHg. Hence, it is important to validate a biomarker, which can distinguish among dietary MeHg sources. Methods. Mercury (Hg) stable isotopes were analyzed in hair samples from peripartum mothers in China (n = 265). Associations between mass dependent fractionation (MDF) (δ202Hg) and mass independent fractionation (MIF) (Δ199Hg) (dependent variables) and dietary MeHg intake (independent variable) were investigated using multivariable regression models. Results. In adjusted models, hair Δ199Hg was positively correlated with serum omega-3 fatty acids (a biomarker for fish consumption) and negatively correlated with maternal rice MeHg intake, indicating MIF recorded in hair can be used to distinguish MeHg intake predominantly from fish versus rice. Conversely, in adjusted models, hair δ202Hg was not correlated with measures of dietary measures of MeHg intake. Instead, hair δ202Hg was strongly, negatively correlated with hair Hg, which explained 27-29% of the variability in hair δ202Hg. Conclusions. Our results indicated that hair Δ199Hg can be used to distinguish MeHg intake from fish versus rice. Results also suggested that lighter isotopes were preferentially accumulated in hair, potentially reflecting Hg binding to thiols (i.e., cysteine); however, more research is needed to elucidate this hypothesis. Broader impacts include 1) validation of a non-invasive biomarker to distinguish MeHg intake from rice versus fish, and 2) the potential to use Hg isotopes to investigate Hg binding in tissues.

Association between serum omega-3 PUFAs levels and cognitive impairment in never medically treated first-episode patients with geriatric depression: A cross-sectional study

BackgroundGeriatric depression increases the public health burden and health care costs, reduces quality of life. Studies have shown the association between ω-3 PUFAs levels and inflammatory markers levels and depression, but few have explored the relationship between omega-3 PUFAs, inflammatory markers, and cognitive function in geriatric depression. This study aimed to compare the differences in ω-3 PUFAs levels and inflammatory markers between geriatric depression with cognitive impairment (CI) and those without CI. MethodsA total of three hundred and five elderly patients were recruited. In addition to collecting basic information, their blood specimens were collected to detect serum EPA, DHA, AA, TC, LDL-C, IL-6, TNF-α, and hs-CRP levels. The Hamilton depression scale (HAMD), Hamilton anxiety scale (HAMA), and The Montreal cognitive assessment (MoCA) were used to assess their depression, anxiety, and cognitive function, respectively. ResultsCompared to those without CI, geriatric depression patients with CI had higher serum TC, LDL-C levels, lower EPA, DHA, and AA levels, and more elevated IL-6, TNF-α, and hs-CRP levels (all P < 0.05). Further linear regression analysis showed that EPA, DHA, and TNF-α, hs-CRP levels were significantly associated with the occurrence and the severity of CI. LimitationsNo causal relationship could be drawn due to the cross-sectional design. ConclusionsOmega-3 PUFAs and inflammatory factors levels may predict CI in elderly patients with MDD in the future. Our findings suggest that ω-3 PUFAs (EPA and DHA) and inflammatory factors (TNF-α and CRP) may predict the occurrence and the severity of CI among elderly MDD patients.

The Effect of Crackers Enriched with Camelina Sativa Oil on Omega-3 Serum Fatty Acid Composition in Older Adults: A Randomized Placebo-Controlled Pilot Trial

BackgroundCamelina sativa oil is one of the richest dietary sources of omega-3, with polyunsaturated fatty acids amounts of over 50%, linolenic acid content of around 40–45%, and linoleic acid of about 15%. Moreover, this oil is a valuable source of antioxidants which provide oxidative stability. All those features raise interest in considering Camelina oil as an alternative and sustainable oil source providing stable omega-3-rich emulsions for functional food production.ObjectivesThe present study aimed to investigate the effects of Camelina oil-enriched crackers on serum omega-3 concentration, inflammatory markers and serum lipid profile.DesignRandomized placebo-controlled pilot trial. Setting: Research and Development Center (Complife Italia s.r.l.).ParticipantsSixty-six free-living older volunteers (aged≥65 years).InterventionOlder adults were enrolled and randomly assigned to one of two groups: the camelina group or the placebo group. Subjects consumed daily 35 g of crackers (Camelina enriched crackers or placebo ones) twice daily for 12 weeks.MeasurementsSerum polyunsaturated fatty acid profile, inflammatory status and serum lipid panel parameters were recorded pre and post-intervention.ResultsIn the camelina group, alpha-linolenic acid serum concentration was significantly higher (p<0.01) compared to the placebo group at the end of the study. Concerning inflammatory plasma markers, a significant mean pro-inflammatory interleukin-18 plasma concentration decrease in the placebo group compared to the camelina one was observed (p<0.05). No significant differences in other mean inflammatory markers concentrations post-intervention were noted in either group. Lastly, examining the change in lipid profile, it is noteworthy that a higher reduction of total cholesterol, low-density lipoprotein and triglycerides in the camelina group postintervention, despite the lack of statistical significance.ConclusionCamelina oil significantly elevated the serum alpha-linolenic acid concentration with no significant changes in inflammatory markers and lipid profile.

The effectiveness of omega-3 fatty acids on health outcomes in women with breast cancer: A systematic review.

This study aimed to systematically evaluate the impact of omega-3 fatty acids on the health outcomes of women with breast cancer in electronic databases (PubMed, Scopus, ProQuest, Web of Science, and Cochrane Library) for interventional studies. The risk of bias and the quality of the included articles were assessed by Cochrane Collaboration Handbook guidance. The statistical analyses were not conducted because of the heterogeneity of the included studies. Of 3676 identified articles, 11 articles were included in this study. The majority of the included studies were not of high quality. Median progression time and overall survival significantly improved. Additionally, surgical site healing complications and infection rates decreased. There was a significant decrease in perceived stress, sleep disturbance, depression, pain, joint stiffness, and fatigue throughout the intervention. Moreover, omega-3 fatty acids consumption significantly increased the total serum omega-3, EPA, and DHA, and decreased the omega-6: omega-3 ratio, total leukocytes, lymphocytes, leptin, and CRP, accordingly. Mild gastrointestinal symptoms were reported in only two studies without clinically relevant adverse events. Omega-3 fatty acids may cause improvement in physical, mental, and some inflammatory and metabolic indices during treatment or posttreatment course of breast cancer patients. Due to the possibility of free radical formation, omega-3 FAs supplementation and consumption must be done very carefully.

PS-BPP06-9: ASSOCIATIONS BETWEEN SERUM AND DIETARY OMEGA-3 FATTY ACID AND COGNITIVE FUNCTION IN A POPULATION OF COMMUNITY-DWELLING JAPANESE. TANUSHIMARU STUDY

Objective: Previous studies indicate that dietary omega-3 polyunsaturated fatty acids (PUFA) are modifiable risk factors for CVD and cognitive decline. This study aimed to investigate the association between serum and dietary omega-3 PUFA and cognitive function were measured in a general population. Design and method: A total of 976 residents (381 males, 595 females, mean age 62.6 years) underwent a physical examination, a nutrition survey and the mini-mental state examination as an evaluation of cognitive function in 2009 and followed up in 2018. Results: The serum omega-3/omega-6 ratio were significantly associated with age (p &lt; 0.0001), sex (male, p &lt; 0.0001), MMSE (p &lt; 0.0001), LDL-c (inversely, p &lt; 0.01), and salt intake (p &lt; 0.05), using by multiple stepwise regression analysis. The dietary intake of proteins from fish (p &lt; 0.0001), trace elements, (p &lt; 0.01), vitamin D, B6, B12 (p &lt; 0.0001), and salt (p &lt; 0.0001) showed dose dependent relationships with the serum omega-3/omega-6 ratio using analysis of covariance. Subjects were divided into 4 groups according to their progression of cognitive decline in 10 years. Serum omega-3 levels of group with normal cognitive function (NC) were significantly higher than those of group with cognitive decline (CD) (p &lt; 0.05). However, dietary intakes of omega-3 and omega-6 PUFA were not significant. Interestingly, salt intakes in group with CD were higher than those in group with NC (p &lt; 0.05). The logistic regression analysis revealed that salt intakes was associated with cognitive decline 10 years later after adjustments for confounding factors (odds ratio, 1.1; 95% C.I., 1.01–1.13; p = 0.01) Conclusion: The present study demonstrated that omega-3 PUFA may preserve a cognitive function and excessive intakes of salt may have an adverse effect on cognitive function.

Abstract 11381: Associations Between Serum and Dietary Omega-3 to Omega-6 Ratio and Cognitive Function in a Population of Community-Dwelling Japanese. -Tanushimaru Study-

Introduction: Previous studies indicate that dietary omega-3 polyunsaturated fatty acids (PUFA) are modifiable risk factors for CVD and cognitive decline. This study aimed to investigate the association between serum and dietary omega-3/omega-6 PUFA ratio and cognitive function were measured in a general population. Hypothesis: We assessed the hypothesis that the serum and dietary omega-3/omega-6 PUFA ratio preserve a cognitive function. Method: A total of 976 residents (381 males, 595 females, mean age 62.6 years) underwent a physical examination, a nutrition survey and the mini-mental state examination as an evaluation of cognitive function in 2009 and followed up in 2018. Results: The serum omega-3/omega-6 ratio were significantly associated with age (p &amp;lt; 0.0001), sex (male, p &amp;lt;0.0001), MMSE ( p &amp;lt; 0.0001), LDL-c ( inversely, p &amp;lt; 0.01), and salt intake ( p &amp;lt; 0.05), using by multiple stepwise regression analysis. The dietary intake of proteins from fish ( p &amp;lt; 0.0001), trace elements, ( p &amp;lt; 0.01), vitamin D, B6, B12 ( p &amp;lt;0.0001), and salt ( p &amp;lt; 0.0001) showed dose dependent relationships with the serum omega-3/omega-6 ratio using analysis of covariance. Subjects were divided into 4 groups according to their progression of cognitive decline in 10 years. Serum omega-3/omega-6 ratio of group with normal cognitive function (NC) were significantly higher than those of group with cognitive decline (CD) (p &amp;lt; 0.05). However, dietary intakes of omega-3 and omega-6 PUFA were not significant. Interestingly, salt intakes in group with CD were higher than those in group with NC (p &amp;lt; 0.05). The logistic regression analysis revealed that salt intakes was associated with cognitive decline 10 years later after adjustments for confounding factors (odds ratio, 1.1; 95% C.I., 1.01-1.13; p = 0.01) In conclusion, the present study demonstrated that omega-3 PUFA may preserve a cognitive function and excessive intakes of salt may have an adverse effect on cognitive function.

Associations between omega-3 fatty acids and insulin resistance and body composition in women with polycystic ovary syndrome.

BackgroundPolycystic ovary syndrome (PCOS) is strongly associated with abdominal obesity and insulin resistance and effective approaches to nutrition (e.g., omega-3 fatty acids intake) might improve the cardiometabolic risk profile. This study aimed to examine the associations of dietary and serum omega-3 fatty acids with insulin resistance (IR) and body composition among PCOS patients.MethodsA total of 185 patients with PCOS were included in our analysis. Dietary information was collected through face-to-face interviews using a 102-item food frequency questionnaire (FFQ). Serum omega-3 fatty acid levels were measured with the gas chromatography method. Body composition was measured by both dual-energy X-ray absorptiometry (DXA) and bioelectrical impedance (BIA) methods. The multivariable linear regression model was applied to analyze the associations of dietary and serum omega-3 fatty acids with the levels of Homeostasis Model Assessment for Insulin Resistance (HOMA-IR) and body composition parameters among PCOS patients.ResultsOur results indicated that the dietary long-chain omega-3 polyunsaturated fatty acids (PUFA) intakes were negatively associated with HOMA-IR (β = –0.089, P = 0.040), fat mass (β = –0.022, P = 0.047), and body fat percentage (β = –0.026, P = 0.032). For serum biomarkers, higher total omega-3 PUFAs levels (β = –0.158, P = 0.021) and long-chain omega-3 PUFAs levels (β = –0.187, P < 0.001), particularly eicosapentaenoic acid (EPA) (β = –164, P = 0.011) and docosahexaenoic acid (DHA) (β = –0.158, P = 0.001) were also associated with decreased HOMA-IR. In addition, generally, dietary and serum long-chain omega-3 PUFA levels, DPA, and DHA levels were both positively associated with muscle mass measured by DXA; whereas serum total, long-chain and individual omega-3 PUFA levels (e.g., DPA, EPA, and DHA) were all negatively associated with fat mass and body fat percentage. These findings were further confirmed by the findings for body composition measured by the BIA method.ConclusionHigher levels of dietary and serum omega-3 PUFAs, particularly long-chain omega PUFAs (DPA and DHA), might have beneficial effects on metabolic parameters and body composition among PCOS patients.

Association between omega-3/6 fatty acids and cholelithiasis: A mendelian randomization study.

BackgroundOmega-3 and omega-6 may be protective factors for cholelithiasis. However, this relationship has not yet been demonstrated clearly. Therefore, we attempted to identify these causal relationships.Materials and methodsThe omega-3/6 fatty acid discovery dataset was obtained from UK Biobank and contained 114,999 individuals. The validation set was derived from an independent genome-wide association study (GWAS) and contained 13,544 individuals. The cholelithiasis dataset was derived from FinnGen and contained 19,023 cases and 195,144 controls. The inverse variance weighting (IVW) method was used as the main method of analysis in this study. Multiple methods of analysis were also used in the repeated methods, including the MR-Egger, weighted median, MR-pleiotropic residual sum (MR-PRESSO), outliers, and maximum likelihood methods. In addition, we used multiple sensitivity analyses to identify the potential pleiotropy.ResultIn the discovery stage, the results of the random effect IVW analysis showed that higher omega-3 levels were correlated inversely with the risk of cholelithiasis (β = –0.22, 95% CI [–0.32 to –0.12], P = 1.49 × 10–5). When the replication analysis was performed using another set of instrumental variables (IVs), the causal relationship between omega-3 fatty acids and cholelithiasis remained stable (β = –0.42, 95% CI [–0.66 to –0.18], P = 5.49 × 10–4), except for the results obtained using the MR-Egger method, which were not significant. The results of the IVW approach showed that each SD increase in omega-6 levels was associated negatively with the risk of cholelithiasis, both in the discovery (β = –0.21, 95% CI [–0.35 to –0.06], P = 4.37 × 10–3) and the validation phases (β = –0.21, 95% CI [–0.40 to –0.02], P = 3.44 × 10–2).ConclusionThe results of our MR study suggest that omega-3/6 is associated with cholelithiasis risk. Attention to the risk of cholelithiasis in individuals with low serum omega-3/6 levels is necessary.

Associations between serum and dietary omega-3 fatty acid and cognitive function in a population of community-dwelling Japanese - Tanushimaru study

Background and Aims : Previous studies indicate that dietary omega-3 polyunsaturated fatty acids (PUFA) are modifiable risk factors for CVD and cognitive decline. To investigate the association between serum and dietary omega-3 PUFA and cognitive function were measured in a general population.

The Association of Serum Inflammatory Markers and Self-Reported Cognitive Outcomes in Women With Breast Cancer Undergoing Chemotherapy

ObjectivesChemotherapy-induced neuroinflammation may contribute to cognitive dysfunction. Previously we found that serum omega-3 and omega-6 fatty acids were associated with inflammatory markers in a cohort of 60 women undergoing chemotherapy for breast cancer. The objective of this project was to determine if serum inflammatory markers were correlated with self-reported cognitive assessments in these women. MethodsSerum samples and data on self-reported cognitive function were collected from 60 women undergoing adjuvant chemotherapy for breast cancer at baseline, the fourth cycle of chemotherapy (C4), and 6 months after chemotherapy (6M). Serum inflammatory markers were analyzed using multiplex enzyme-linked immunoassay. Spearman’s rank correlation was used to quantify the association between inflammatory markers and the Multifactorial Memory Questionnaire (MMQ) scores at baseline (n = 25), C4 (n = 18), and 6M (n = 18), as well as the Behavior Rating Inventory of Executive Function–Adult Version (BRIEF-A) scores at baseline (n = 24), C4 (n = 18), and 6M (n = 16). ResultsBetter MMQ scores were significantly correlated with lower interleukin-1β (IL-1β) at baseline, higher tumor necrosis factor alpha-receptor II (TNF-RII) at C4, and higher Interleukin 8 (IL-8) at 6M. In addition, improvements in MMQ results were correlated with decreases in IL-1β from baseline to 6M (p < 0.05 for all). Better BRIEF-A scores were significantly correlated with lower IL-1β at baseline and higher TNF-RII at C4. Improvements in BRIEF-A scores were correlated with increases in TNF-RII from baseline to C4, and with increases in interleukin 6, IL-8, and TNFRII from baseline to 6M (p < 0.05 for all). ConclusionsOverall, lower serum IL-1β and higher TNF-RII and IL-8 were associated with better self-reported cognitive function in women with breast cancer undergoing chemotherapy. Future research will examine associations of fatty acid biomarkers and cognitive function. Funding SourcesOhio State University Stephanie Spielman Breast Cancer Center Kroger Fund.

Assessing the Impact of Socioeconomic Status on Maternal and Cord Serum Omega-3 Polyunsaturated Fatty Acid Levels

ObjectivesOmega-3 (n-3) polyunsaturated fatty acids (PUFAs) are essential in fetal growth and development and have been shown to modulate inflammatory processes throughout the lifespan. Previous studies have demonstrated that individuals with lower socioeconomic status (SES) may be at risk for low intake of n-3 PUFAs, however, no research has compared the concentrations of these nutrients present in maternal and cord serum between markers of SES. The purpose of this study is to assess the relationship between markers of SES and levels of n-3 PUFAs in maternal and cord serum in a group of patients delivering at a Midwest Academic Medical Center.MethodsAn IRB-approved study enrolled mother-infant pairs (n = 55) at the time of delivery for collection of maternal and cord serum samples. n-3 PUFA levels quantified included Eicosapentaenoic acid (EPA), Docosahexaenoic acid (DHA), and total n-3 PUFAs. Markers of SES include private vs public insurance, income ≤ 150% of the poverty line vs > 150%, and college degree earners vs no college degree. The Mann-Whitney U test was used to assess differences in n-3 PUFA levels between SES groups. A P < 0.05 was considered statistically significant.ResultsMedian gestational age at delivery was 39.3 weeks. Significantly higher nutrient levels were present in college-educated mothers vs less than college-educated mothers in median maternal EPA (9.44 µg/mL vs 5.13 µg/mL, p = 0.010), cord EPA (1.88 µg/mL vs 1.40 µg/mL, p = 0.011), cord DHA (37.96 µg/mL vs 32.80 µg/mL, p = 0.014), and total cord n-3 PUFAs (44.23 µg/mL vs 39.34 µg/mL, p = 0.024). Median cord EPA levels were significantly higher in those with private insurance compared to public (1.79 µg/mL, 1.18 µg/mL, p = 0.022). Additionally, median cord EPA levels were significantly higher in those > 150% the poverty line (1.79 µg/mL, 1.10 µg/mL, p = 0.030).ConclusionsOur findings suggest that individuals with lower SES may be at risk for lower serum levels of n-3 PUFAs in pregnancy, which could increase their susceptibility to adverse birth and pregnancy outcomes. Future studies should focus on replicating these results in a larger, more heterogeneous sample and should consider analyzing additional markers of SES.Funding SourcesUNMC Pediatrics Department; Child Health Research Institute.

Association of blood eicosapentaenoic acid levels with intracerebral hemorrhage during the COVID-19 pandemic: preliminary experience from a single-center in Japan

BackgroundThe COVID-19 pandemic has forced lockdowns and declarations of states of emergency, resulting in marked changes to daily life such as dietary habits in many countries. Though serum omega-3 polyunsaturated fatty acids levels have been shown to be useful markers for recurrent vascular events or worse prognosis in cardiovascular diseases and ischemic stroke, the relationship between serum omega-3 PUFA levels and the occurrence of intracerebral hemorrhage has essentially been unknown. We explored the association of serum omega-3 polyunsaturated fatty acids with intracerebral hemorrhage during the COVID-19 pandemic.MethodsParticipants comprised patients admitted to Juntendo University Hospital (Tokyo, Japan) with intracerebral hemorrhage between January 1, 2016 and April 30, 2020. Clinical characteristics including serum omega-3 polyunsaturated fatty acid levels were compared between patients developing intracerebral hemorrhage during the period from January 1, 2016 to February 29, 2020, and the subsequent COVID-19 pandemic period (March 1 to April 30, 2020). Clinical characteristics independently related to intracerebral hemorrhage during the COVID-19 pandemic were analyzed by comparing these two cohorts of intracerebral hemorrhage patients in different periods.ResultsA total of 103 patients (age, 67.0 ± 13.9 years; 67 males) with intracerebral hemorrhage were enrolled. Intracerebral hemorrhage developed in 91 patients before and 12 patients during the COVID-19 pandemic. Monthly averages of intracerebral hemorrhage patients admitted to our hospital during and before the COVID-19 pandemic were 6 and 1.82, respectively. Serum eicosapentaenoic acid levels were significantly lower in intracerebral hemorrhage patients during the COVID-19 pandemic than before (31.87 ± 12.93 μg/ml vs. 63.74 ± 43.29 μg/ml, p = 0.007). Multiple logistic regression analysis showed that, compared to before the COVID-19 pandemic, dyslipidemia (odds ratio 0.163, 95% confidence interval 0.031–0.852; p = 0.032) and eicosapentaenoic acid levels (odds ratio 0.947, 95% confidence interval 0.901–0.994; p = 0.029) were associated with intracerebral hemorrhage during the COVID-19 pandemic.ConclusionsFrom our preliminary results, low eicosapentaenoic acid levels were linked with intracerebral hemorrhage during the COVID-19 pandemic. Low levels of eicosapentaenoic acid might be an endogenous surrogate marker for intracerebral hemorrhage during the COVID-19 pandemic.

EFFICACY OF A LIPID-LOWERING DIET ON KEY FATTY ACID RATIOS AND OMEGA-3 INDEX IN HYPERLIPIDEMIC SUBJECTS.

Polyunsaturated fatty acid (PUFA) dietary intake, status and serum key fatty acid (FA) ratios may aid in cardiovascular disease-related risk assessment. The aim of this study was to investigate the effects of lipid-lowering diet on key FA ratios in serum phospholipids and omega-3 index in erythrocyte phospholipids in moderately hyperlipidemic subjects. The study included 41 subjects, mean age 56±6 years. Nutritional habits were evaluated by food frequency questionnaire. Participants followed lipid lowering diet for 12 weeks. Energy intake of omega-6 and omega-3 FA was changed from 7.6% and 0.6% to 5.7% and 1.2%, respectively. Marked decrease in four FA ratios in serum phospholipids, i.e., omega-6/omega-3, arachidonic acid (AA)/eicosapentaenoic acid (EPA), AA/docosahexaenoic acid (DHA), AA/(EPA+DHA) and omega-3 index (EPA+DHA) was found in study subjects after lipid-lowering diet. Total cholesterol/high-density lipoprotein (HDL), low-density lipoprotein (LDL)/HDL and triacylglycerol/HDL-cholesterol ratios positively correlated with all FA ratios, and negatively correlated with total omega-3 levels in serum phospholipids and omega-3 index in erythrocytes. Total serum omega-3 levels showed strongest association with lipoprotein ratios and positive correlation with homeostatic model assessment (HOMA) index. In conclusion, lipid-lowering diet resulted in decreased serum key FA ratios, increased omega-3 levels, and improved insulin sensitivity that may lead to a lower risk of cardiovascular disease in subjects with moderate hyperlipidemia.

Association between the metabolic profile of serum fatty acids and diabetic nephropathy: a study conducted in northeastern China.

Background and purpose:With the progressive increase in the prevalence of type 2 diabetes mellitus (T2DM), diabetic nephropathy (DN) – one of the most common chronic microvascular complications – has evolved into a significant cause of death worldwide among end-stage renal disease patients. Academic researchers have for decades focused on the development of DN and recently found that free fatty acids (FFAs) constituted an independent risk factor for vascular complications in T2DM patients. It is therefore critical to determine whether the metabolic profile of FFAs is related to DN.Methods:This study comprised 611 research subjects in Dalian, a city in northeast China: 52 DN patients, 115 T2DM patients, and 444 healthy controls. We determined 15 forms of serum FFAs, including arachidonic acid (AA, C20:4), docosahexaenoic acid (DHA, C22:6), erucic acid (C22:1), nervonic acid (NA, C24:1), estimated total omega-3s, total omega-6s, the omega-3/omega-6 ratio, and total FFA content by liquid chromatography–mass spectrometry (LC-MS).Results:The levels of NA (mean = 45.27, range = 0.84–76.57) and DHA (mean = 324.58, range = 205.38–450.03) in DN patients were slightly lower than those in T2DM patients or healthy controls. The serum omega-3 polyunsaturated fatty acid (PUFA) DHA (C22:6) was significantly negatively correlated with microalbuminuria (MAU), the albumin/creatinine ratio (ACR), body mass index (BMI), fasting plasma glucose (FPG), and glycosylated hemoglobin (HbA1c). The serum monounsaturated fatty acid (MUFA) NA (C24:1) was significantly negatively correlated with BMI, FPG, and HbA1c. After adjustment of variables, multiple logistic regression analysis revealed significant odds ratios (ORs) [with confidence intervals (CIs)] for DHA (0.991, 0.985–0.997; p = 0.002) and NA (0.978, 0.958–0.999; p = 0.037).Conclusion:In this study, we ascertained that the contents of NA and DHA in patients with DN were relatively low, and that DHA was negatively correlated with MAU and the ACR. However, large-scale, population-based studies focusing on the role of NA and DHA in the pathogenesis of DN are still required in the future.

Integrative Analysis of the Inflammatory Bowel Disease Serum Metabolome Improves Our Understanding of Genetic Etiology and Points to Novel Putative Therapeutic Targets

Polygenic and environmental factors are underlying causes of inflammatory bowel disease (IBD). We hypothesized that integration of the genetic loci controlling a metabolite's abundance, with known IBD genetic susceptibility loci, may help resolve metabolic drivers of IBD. We measured the levels of 1300 metabolites in the serum of 484 patients with ulcerative colitis (UC) and 464 patients with Crohn's disease (CD) and 365 controls. Differential metabolite abundance was determined for disease status, subtype, clinical and endoscopic disease activity, as well as IBD phenotype including disease behavior, location, and extent. To inform on the genetic basis underlying metabolic diversity, we integrated metabolite and genomic data. Genetic colocalization and Mendelian randomization analyses were performed using known IBD risk loci to explore whether any metabolite was causally associated with IBD. We found 173 genetically controlled metabolites (metabolite quantitative trait loci, 9 novel) within 63 non-overlapping loci (7 novel). Furthermore, several metabolites significantly associated with IBD disease status and activity as defined using clinical and endoscopic indexes. This constitutes a resource for biomarker discovery and IBD biology insights. Using this resource, we show that a novel metabolite quantitative trait locus for serum butyrate levels containing ACADS was not supported as causal for IBD; replicate the association of serum omega-6 containing lipids with the fatty acid desaturase 1/2 locus and identify these metabolites as causal for CD through Mendelian randomization; and validate a novel association of serum plasmalogen and TMEM229B, which was predicted as causal for CD. An exploratory analysis combining genetics and unbiased serum metabolome surveys can reveal novel biomarkers of disease activity and potential mediators of pathology in IBD.

Omega-6 fatty acids and the risk of cardiovascular disease: insights from a systematic review and meta-analysis of randomized controlled trials and a Mendelian randomization study.

IntroductionOmega-6 polyunsaturated fatty acids (PUFAs) represent almost 15% of the total energy intake in Western countries. Their effects on the cardiovascular (CV) risk factors are still controversial. Thus, we performed a systematic review and meta-analysis of randomized control trials (RCTs) as well as a Mendelian randomization (MR) analysis to evaluate the links and possible causality between supplementation or serum levels of omega-6 PUFA, CV disease (CVD) and cardiometabolic risk factors.Material and methodsSelected databases were searched until September 2019 to identify prospective studies investigating the effects of omega-6 PUFA supplementation on CVD events/mortality. Random-effects model meta-analysis was performed for quantitative data synthesis. Trial sequential analysis (TSA) was used to evaluate the optimal sample size to detect a 20% reduction in outcomes after administration of omega-6 PUFAs. The inverse variance weighted (IVW) method, weighted median-based method, MR-Egger and MR-Pleiotropy RESidual Sum and Outlier (PRESSO) were applied for MR.ResultsThe pooled estimate risk ratio (RR) of omega-6 PUFA supplementation was 0.94 for any CVD event (95% CI: 0.77–1.15, I2 = 66.2%), 1.06 for CVD death (95% CI: 0.73–1.55, I2 = 66.2%), 0.84 for coronary heart disease (CHD) events (95% CI: 0.61–1.16, I2 = 79.4%), 0.87 for myocardial infarction (MI) (95% CI: 0.74–1.01, I2 = 2.3%) and 1.36 for stroke (95% CI: 0.45–4.07, I2 = 55.3%). In contrast, MR showed that individuals with higher serum omega-6 acid – adrenic acid (AA) levels had a greater risk for CHD events (IVW β = 0.526), MI (IVW β = 0.606) and large artery stroke (IVW β = 1.694), as well as increased levels of fasting blood glucose (FBG) (IVW β = 0.417), low-density lipoprotein cholesterol (LDL-C) (IVW β = 0.806), high-density lipoprotein cholesterol (HDL-C) (IVW β = 0.820), and lower levels of triglycerides (TG) (IVW β = –1.064) and total cholesterol (TC) (IVW β = –1.064).ConclusionsOmega-6 PUFA supplementation did not affect the risk for CVD morbidity and mortality. Additionally, based on MR analysis we found that higher AA levels might even significantly increase the risk of CHD, MI and large artery stroke, as well as the levels of FBG and LDL-C, whereas they were negatively associated with TC and TG. Since a considerable chance of heterogeneity was observed for some of the results, further research is needed to elucidate the effects of omega-6 PUFAs on cardiometabolic outcomes.

The Role of Serum Omega 3 Levels on Muscle Mass, Muscle Strength, and Physical Performance in the Elderly Community

A B S T R A C TIntroduction. Old age is related to geriatric syndrome where there are several healthproblems that often occur related to a decrease in body function and an increase inthe inflammatory process. Decrease in muscle mass, muscle strength and physicalperformance will lead to a condition of sarcopenia and frailty syndrome in the elderly.The importance of prevention so that sarcopenia does not occur in the elderly byevaluating the factors that can cause it, one of which is controlling nutritional factors(macro and micro nutrients), such as in research, namely omega-3 macronutrients.The purpose of this study was to determine the correlation between serum omega-3levels with muscle mass, muscle strength, and physical performance in the elderlycommunity at Moehammad Hoesin Hospital Palembang. Methods. This research isan observational analytic study with a cross-sectional approach which wasconducted at the Integrated Geriatric Clinic Internal Medicine RSMH Palembangfrom November 2019 to November 2020. A sample of 21 people aged&gt; 60 years wasexamined for muscle mass, muscle strength, physical performance and omega-levels. 3 serums. All data processing and analysis in this study used SPSS version25 for Windows. Results. Of the 21 subjects, it was found that women were 19people (90.5%) and 2 men (9.5%). The mean value of muscle mass was 37.65 ± 5.7,hand grip strength was 24.04 ± 5 kg, and walking speed was 6.72 ± 1.8 seconds per6 meters. There were 11 subjects with low serum omega-3 levels of 485.25 ± 110.19mg. There was a significant relationship between serum omega-3 levels and musclemass (p = 0.041) with moderate correlation strength (r = 0.448). Conclusion: Musclemass has a significant relationship with serum omega-3 levels in the elderly withmoderate strength. Meanwhile, muscle strength and physical performance did nothave a significant relationship.

The Role of Serum Omega 3 Levels on Muscle Mass, Muscle Strength, and Physical Performance in the Elderly Community

A B S T R A C TIntroduction. Old age is related to geriatric syndrome where there are several healthproblems that often occur related to a decrease in body function and an increase inthe inflammatory process. Decrease in muscle mass, muscle strength and physicalperformance will lead to a condition of sarcopenia and frailty syndrome in the elderly.The importance of prevention so that sarcopenia does not occur in the elderly byevaluating the factors that can cause it, one of which is controlling nutritional factors(macro and micro nutrients), such as in research, namely omega-3 macronutrients.The purpose of this study was to determine the correlation between serum omega-3levels with muscle mass, muscle strength, and physical performance in the elderlycommunity at Moehammad Hoesin Hospital Palembang. Methods. This research isan observational analytic study with a cross-sectional approach which wasconducted at the Integrated Geriatric Clinic Internal Medicine RSMH Palembangfrom November 2019 to November 2020. A sample of 21 people aged&gt; 60 years wasexamined for muscle mass, muscle strength, physical performance and omega-levels. 3 serums. All data processing and analysis in this study used SPSS version25 for Windows. Results. Of the 21 subjects, it was found that women were 19people (90.5%) and 2 men (9.5%). The mean value of muscle mass was 37.65 ± 5.7,hand grip strength was 24.04 ± 5 kg, and walking speed was 6.72 ± 1.8 seconds per6 meters. There were 11 subjects with low serum omega-3 levels of 485.25 ± 110.19mg. There was a significant relationship between serum omega-3 levels and musclemass (p = 0.041) with moderate correlation strength (r = 0.448). Conclusion: Musclemass has a significant relationship with serum omega-3 levels in the elderly withmoderate strength. Meanwhile, muscle strength and physical performance did nothave a significant relationship.