Monounsaturated Fatty Acids Research Articles

Nutritional composition and technological properties determining the quality of different cuts of organic and conventional Turkey meat

The aim of this study was to evaluate the nutritional composition and technological properties of meat from turkeys produced under organic conditions and compare them with those of turkeys produced under conventional conditions. Twenty carcasses of female B.U.T. Premium turkeys (Aviagen Turkeys) were obtained directly from the abattoir ten h after slaughter time of animals. Ten carcasses originated from female turkeys reared under conventional intensive husbandry conditions for meat-type turkeys (on average, 5611.8 ± 196.2 g of carcass weight) and the other ten carcasses corresponded to female turkeys raised under certified organic free-range conditions (PavosBio, Ávila, Spain) (on average, 5528.5 ± 354.4 g of carcass weight). Breast, thigh and wing meat samples were analyzed from each turkey: Chemical composition, fatty acid profile, free amino acids, mineral and vitamins content, color, and texture. Meat from female turkeys reared under organic conditions presented higher fat content in breast (1.90 vs. 1.01%, P = 0.032), thigh (3.79 vs. 2.68%, P = 0.022) and wing (12.0 vs. 8.91%, P = 0.012) than meat of female turkeys reared under intensive conventional conditions. The proportion of saturated fatty acids was higher in the meat of intensively reared female turkeys than in those reared under organic conditions (42.8 vs. 38.1%, P = 0.017 in breast; 38.8 vs. 33.6%, P = 0.0053 in thigh and 40.2 vs. 33.9%, P < 0.001 in wing). On the contrary, the proportion of monounsaturated fatty acids was higher in meat of organic turkeys (41.4 vs. 35.6%, P = 0.012 in breast; 42.3 vs. 35.6%, P < 0.001 in thigh and 46.9 vs. 39.3%, P = 0.011 in wing). Concentration of riboflavin and pyridoxine was higher by 21.1% (P = 0.010) and by 154% (P = 0.006), respectively, in meat from organically raised female turkeys than in that of female turkeys reared under intensive conditions. The organic turkey meat analyzed contained a higher proportion B2 and B6, lipids and monounsaturated fatty acids, and a lower content of omega-3 polyunsaturated fatty acids.

Yarrowia lipolytica growth, lipids, and protease production in medium with higher alkanes and alkenes

Two strains of Yarrowia lipolytica (CBS 2075 and DSM 8218) were first studied in bioreactor batch cultures, under different controlled dissolved oxygen concentrations (DOC), to assess their ability to assimilate aliphatic hydrocarbons (HC) as a carbon source in a mixture containing 2 g·L−1 of each alkane (dodecane and hexadecane), and 2 g·L−1 hexadecene. Both strains grew in the HC mixture without a lag phase, and for both strains, 30 % DOC was sufficient to reach the maximum values of biomass and lipids. To enhance lipid-rich biomass and enzyme production, a pulse fed-batch strategy was tested, for the first time, with the addition of one or three pulses of concentrated HC medium. The addition of three pulses of the HC mixture (total of 24 g·L−1 HC) did not hinder cell proliferation, and high protease (> 3000 U·L−1) and lipids concentrations of 3.4 g·L−1 and 4.3 g·L−1 were achieved in Y. lipolytica CBS 2075 and DSM 8218 cultures, respectively. Lipids from the CBS 2075 strain are rich in C16:0 and C18:1, resembling the composition of palm oil, considered suitable for the biodiesel industry. Lipids from the DSM 8218 strain were predominantly composed of C16:0 and C16:1, the latter being a valuable monounsaturated fatty acid used in the pharmaceutical industry. Y. lipolytica cells exhibited high intrinsic surface hydrophobicity (> 69 %), which increased in the presence of HC. A reduction in surface tension was observed in both Y. lipolytica cultures, suggesting the production of extracellular biosurfactants, even at low amounts. This study marks a significant advancement in the valorization of HC for producing high-value products by exploring the hydrophobic compounds metabolism of Y. lipolytica.

Dietary Fat Intake on Metabolic Health: An in-Depth Analysis of Epidemiological, Clinical, and Animal Studies

&amp;lt;i&amp;gt;Background: &amp;lt;/i&amp;gt;The consumption of dietary fat plays a vital role in the maintenance of metabolic health as it exerts impact over several physiological processes, including lipid profiles, inflammation, and insulin sensitivity, among other factors. The aim of this comprehensive review seeks to assess the influence of dietary fat consumption on metabolic processes. &amp;lt;i&amp;gt;Methods:&amp;lt;/i&amp;gt; An exhaustive and methodical exploration of pertinent databases, such as Web of Science, PubMed, and Scopus, was undertaken to identify animal studies, clinical trials, and epidemiological research. The search terms included &amp;quot;dietary fat,&amp;quot; &amp;quot;metabolic health,&amp;quot; &amp;quot;epidemiological studies,&amp;quot; &amp;quot;clinical trials,&amp;quot; and &amp;quot;animal studies&amp;quot;. &amp;lt;i&amp;gt;Result:&amp;lt;/i&amp;gt; Animal studies demonstrate that high intake of saturated fat impairs insulin sensitivity and glucose tolerance, while unsaturated fats such as monounsaturated fatty acids (MUFAs) and polyunsaturated fatty acids (PUFAs) have beneficial effects. Observational studies in humans reveal that higher intake of saturated fat is associated with an increased risk of metabolic syndrome and type 2 diabetes, whereas unsaturated fats lower the risk. &amp;lt;i&amp;gt;Conclusion:&amp;lt;/i&amp;gt; Clinical trials have further supported the importance of replacing SFAs with healthier fats, such as MUFAs and PUFAs, particularly omega-3 and omega-6 fatty acids, in improving metabolic health markers in human subjects. Instead of advising against fats altogether, it is important to specify the preferred types of fats to be consumed as part of a healthy diet and lifestyle.

A comparative study of sensitizers and liposome composition in radiation-induced controlled drug release for cancer therapy

This study investigates drug-loaded liposomes designed for controlled release under ionizing radiation to refine cancer treatment precision. Liposomes as carriers enable targeted chemotherapy delivery, reducing healthy tissue damage risk. Liposomes containing poly- or mono-unsaturated fatty acids and various sensitizing agents were assessed for responsiveness to UV light and γ photon irradiation including rose bengal (RB), protoporphyrin IX (PPIX), verteporfin (VP), cercosporin (CERC) and hypericin (HYP). Carboxyfluorescein (CF) was used as a surrogate for drug release measurements. VP and PPIX induced rapid drug release and lipid peroxidation under UV light, while RB prompted quick drug release under UV light and a modest immediate release under γ irradiation, eventually reaching full release a few hours after irradiation, demonstrating dose-dependent effects. Smaller liposomes displayed accelerated release, emphasizing size-dependent kinetics. In vitro analyses evaluated radiosensitizing effects of RB-loaded liposomes. Clonogenic assays indicated that RB-filled liposomes had minimal direct radiobiological effects but increased indirect radiation damage, as shown by the curvature of the cell survival curve. Our study sheds light on factors influencing liposomal drug release under ionizing radiation, spotlighting RB as a promising radiosensitizer requiring further investigation for cancer therapy potential.

Effects of different reheating methods on lipid oxidation in frozen silver carp fish cakes

SummaryThis study investigated the effect of five different reheating methods (boiling water, steaming, low‐heat microwave at 120 W, medium‐heat microwave at 400 W, high‐heat microwave at 800 W) on lipid oxidation of silver carp fish cake. The changes of lipid content, thiobarbituric acid (TBA) value, acid value (AV), peroxide value (POV), volatile flavour components and fatty acid composition were detected. The results indicated that products reheated with medium‐heat microwave had higher lipid content, lower TBA, AV and POV value. The medium‐heat and high‐heat microwave reheated group had larger variety of volatile flavour substances. Moreover, the relative content of hexanal and heptanal related to unpleasant “overcooked taste” was less, and the relative content of 2‐heptanone, which contributed to the reduction of fishy odour, was more in medium‐heated microwave group. The content of monounsaturated fatty acids in the medium‐heat microwave group was higher than other reheating methods, so as the ratio of unsaturated to saturated fatty acids. Considering all indicators, medium‐heat microwave reheating is more recommended due to its inhibition of fat oxidation.

Association of free fatty acid in first trimester with the risk of gestational diabetes mellitus: a nested case-control study

BackgroundAccumulating evidence shows that free fatty acids (FFA) are associated with gestational diabetes mellitus (GDM). However, most of the studies focus on a few specific types of FFA, such as α-linolenic acid (C18:3n3) and Arachidonic acid (C20:4n6) or a total level of FFA.ObjectiveThis study aimed to test the association between a variety of FFAs during the first trimester and the risk of GDM.MethodsThe participants came from the Zhoushan Pregnant Women Cohort (ZWPC). A 1:2 nested case-control study was conducted: fifty mothers with GDM were matched with 100 mothers without GDM by age, pre-pregnancy body mass index (BMI), month of oral glucose tolerance test (OGTT) and parity. Thirty-seven FFAs (including 17 saturated fatty acids (SFA), 8 monounsaturated fatty acids (MUFA), 10 polyunsaturated fatty acids (PUFA) and 2 trans fatty acids (TFA)) in maternal plasma during the first trimester were tested by Gas Chromatography–Mass Spectrometry (GC-MS). Conditional logistic regression models were performed to assess the associations of FFA with the risk of GDM.ResultsNine FFAs were respectively associated with an increased risk of GDM (P < 0.05), and four FFAs were respectively associated with a decreased risk of GDM (P < 0.05). SFA risk score was associated with a greater risk of GDM (OR = 1.34, 95% CI: 1.12–1.60), as well as UFA risk score (OR = 1.26, 95% CI: 1.11–1.44), MUFA risk score (OR = 1.70, 95%CI: 1.27–2.26), PUFA risk score (OR = 1.32, 95%CI: 1.09–1.59) and TFA risk score (OR = 2.51, 95%CI: 1.23–5.13). Moreover, joint effects between different types of FFA risk scores on GDM were detected. For instance, compared with those with low risk scores of SFA and UFA, women with high risk scores of SFA and UFA had the highest risk of GDM (OR = 8.53, 95%CI: 2.41–30.24), while the Odds ratio in those with a low risk score of SFA and high risk score of UFA and those with a high risk score of SFA and low risk score of UFA was 6.37 (95%CI:1.33– 30.53) and 4.25 (95%CI: 0.97–18.70), respectively.ConclusionMaternal FFAs during the first trimester were positively associated with the risk of GDM. Additionally, there were joint effects between FFAs on GDM risk.CondensationElevated FFA levels in the first trimester increased the risk of GDM.

Changes in the Fatty Acid Composition of Vegetable Oils Affect the Feeding Behavior, Feed Preference, and Thermoregulatory Responses of Sheep

This research evaluated the effects of energy supplementation on sheep’s feeding behavior, feed preference, and thermoregulatory responses using technical cashew nutshell liquid (CNSL) and different vegetable oils with different unsaturated fatty acid (UFA) compositions. The experiment was completely randomized with five treatments: a mixture of CNSL (0.5%) + vegetable oils [canola (high in monounsaturated fatty acids—MUFA), and corn, soybean, sunflower, or cottonseed oil (high in polyunsaturated fatty acids-PUFA) at 1.5%] based on total diet dry matter, with eight replications. Forty uncastrated male sheep, with an average initial BW of 24.44 ± 1.5 kg, were evaluated for 70 days. The CNSL + vegetable oil blend did not affect DM and neutral detergent fiber (aNDF) intake (p &gt; 0.05). However, diets with canola oil resulted in higher SFA intake (p &lt; 0.05) than other oils. The canola oil + CNSL blend led to a higher intake of UFA and MUFA and lower PUFA intake than other oil blends (p &lt; 0.05). Sheep fed canola oil ruminated fewer boli per day than those fed soybean and sunflower oils. Using three sieves (pef1.18) reflected in higher sheep aNDF intake. Respiratory frequency and surface temperature of sheep were lower before feeding than 3 h after, without effects of the type of oil. Higher serum creatinine and cholesterol levels were observed in sheep fed CNSL with corn and canola oils compared to other oils. Serum calcium was lower in sheep fed CNSL with soybean and canola compared to sunflower and corn. Including CNSL with vegetable oils with different FA compositions did not affect physiological and thermographic variables. However, sheep showed better diet selectivity and lower bolus rumination with higher MUFA (canola oil) content. Including CNSL with canola oil in sheep diets is recommended, as it increases dietary energy content, enhances diet selectivity, reduces PUFA intake, and does not impact animal health.

A Novel Interaction between a 23-SNP Genetic Risk Score and Monounsaturated Fatty Acid Intake on HbA1c Levels in Southeast Asian Women.

Metabolic diseases result from interactions between genetic and lifestyle factors. Understanding the combined influences of single-nucleotide polymorphisms (SNPs) and lifestyle is crucial. This study employs genetic risk scores (GRS) to assess SNPs, providing insight beyond single gene/SNP studies by revealing synergistic effects. Here, we aim to investigate the association of a 23-SNP GRS with metabolic disease-related traits (obesity and type 2 diabetes) to understand if these associations are altered by lifestyle/dietary factors. For this study, 106 Minangkabau women were included and underwent physical, anthropometric, biochemical, dietary and genetic evaluations. The interaction of GRS with lifestyle factors was analyzed using linear regression models, adjusting for potential confounders. No statistically significant associations were observed between GRS and metabolic traits; however, this study demonstrates a novel interaction observed between 13-SNP GRS and monounsaturated fatty acid (MUFA) intake, and that it had an effect on HbA1c levels (p = 0.026). Minangkabau women with low MUFA intake (≤7.0 g/day) and >13 risk alleles had significantly higher HbA1c levels (p = 0.010). This finding has implications for public health, suggesting the need for large-scale studies to confirm our results before implementing dietary interventions in the Indonesian population. Identifying genetic influences on dietary response can inform personalized nutrition strategies to reduce the risk of metabolic disease.

From organic waste to renewable energy: response surface methodology approach for optimized biodiesel production from palm weevil larvae (Rhynchophorus ferrugineus)

AbstractThis study aimed to improve the production of biodiesel from white palm larvae (WPL) and to evaluate its potential as a feedstock. The larvae were grown using kitchen and palm waste for 21 days, and the crude oil was then extracted. The extracted oil was analyzed for its physicochemical properties and fatty acid composition. The analysis found that the feedstock oil contained a high quantity of monounsaturated fatty acids, indicating its suitability for biodiesel production. To optimize the production process, response surface methodology (RSM) was employed. A central composite design was used to study four operating conditions: temperature, methanol‐to‐oil mole ratio, esterification time, and catalyst loading for esterification, as well as transesterification time and catalyst concentration. The best conditions for esterification were a methanol‐to‐oil ratio of 18:1, a temperature of 70 °C, 120 min of reaction time, and a 4% H2SO4 catalyst. For transesterification, the optimal conditions were a methanol‐to‐oil ratio of 10:1, a temperature of 65 °C, 90 min of reaction time, and a 2% KOH catalyst concentration. The experimental data fit well with models, with significant P‐values and high R2 values. The biodiesel produced under the optimized conditions met the fuel quality standards set by Brazilian, European, and American standards. In conclusion, this study successfully optimized the biodiesel production process from white palm larvae and confirmed its suitability as a feedstock. The feedstock oil had properties that were suitable for biodiesel production, and the optimized conditions resulted in biodiesel that met fuel‐quality standards.

The association between plasma fatty acids and risk of lung cancer: a prospective cohort study of the UK Biobank.

Fatty acids (FAs) have emerged as significant contributors to tumorigenesis, yet prospective evidence regarding their specific effects on lung cancer risk remains scarce. To investigate the association between plasma FAs and lung cancer incidence, as well as a potential modification effect of genetic susceptibility on lung cancer risk. A cohort study was conducted involving 112,547 cancer-free participants from the UK Biobank, with measurements of plasma FAs, including saturated fatty acids (SFAs), monounsaturated fatty acids (MUFAs), and polyunsaturated fatty acids (PUFAs) at baseline (2006-2010). Cox regression models were employed to assess lung cancer risk according to plasma FA quartiles or 1-SD increment. Furthermore, interaction between plasma FAs and polygenic risk score (PRS) was evaluated using an additive model. Over an average 10.9-year follow-up, 1122 lung cancer cases occurred. After multivariable adjustment, MUFAs were positively associated with lung cancer risk (hazard ratio [HR] per 1-SD = 1.32, 95% confidence interval [CI]: 1.13-1.54). In contrast, PUFAs, particularly n-3 PUFAs, n-6 PUFAs, docosahexaenoic acid, and linoleic acid, were associated with a lower risk of lung cancer, with HRs ranging from 0.79 (95% CI: 0.72-0.87) to 0.89 (95% CI: 0.83-0.95). SFAs were not significantly associated with lung cancer risk. Moreover, we observed an additive interaction between plasma PUFAs and genetic risk. Individuals with a high genetic risk and the lowest quartile of plasma PUFAs had the highest risk of lung cancer (HR = 2.20, 95% CI: 1.43-3.38). Our findings suggest that plasma PUFAs may serve as protective factors, while MUFAs represent risk factors for lung cancer, offering novel insights into lung cancer carcinogenesis and prevention.

Dietary Pattern's Role in Hepatic Epigenetic and Dietary Recommendations for the Prevention of NAFLD.

Comprehensive screening and eligibility criteria identified eleven articles focusing on epigenetic changes in NAFLD patients through dietary modifications or nutrient supplementation. Data were organized based on study types, categorizing them into evaluations of epigenetic changes in NAFLD patients through dietary pattern modifications or specific nutrient intake. The study highlights the importance of dietary interventions in managing and preventing NAFLD, emphasizing the potential of dietary patterns to influence hepatic epigenetic gene modulation. This study provides valuable insights and recommendations to mitigate the risk of developing NAFLD: (i) eat a primarily plant-based diet; (ii) increase consumption of high-fiber foods; (iii) consume more polyunsaturated and monounsaturated fatty acids; (iv) limit processed foods, soft drinks, added sugars, and salt; and (v) avoid alcohol.

Obtaining Goats’ Dairy Products Enriched in Healthy Fatty Acids by Valuing Linseed or Hempseed as Dietary Ingredients

The study aimed to assess the effects of including linseeds or hempseeds in the diets of late lactation Murciano-Granadina dairy goats on the nutritional quality of the milk and cheese fat, expressed by the fatty acids profile and the healthy lipid indices. Thirty-six goats were randomly distributed in 3 groups of 12 animals each, according to a 3 × 3 Latin square design, and fed three different diets: group CON (control, with sunflower meal, 11.5% DM basis); group LIN, where sunflower meal was replaced by linseed; and group HMP, where sunflower meal was replaced by hempseeds. The replacement had no effects on the milk yields and the milk protein content as no significant differences were detected among groups. The significant increase of the fat content in the case of the LIN and HMP groups was accompanied by significant decreases in saturated fatty acids concentration and very significant increases in monounsaturated fatty acids. The content of n3 and n6-PUFAs (polyunsaturated fatty acids) increased, mainly due to a 4.1 times higher proportion of alpha-linolenic acid (ALA; C 18:3n-3) in LIN diet milk and a 1.3 times higher proportion of linoleic acid (LA; C 18:2n6c) in HMP diet milk. The conjugated linoleic acid (CLA; isomer c9, t11) was 1.9 times higher for the LIN diet and 5.05 times higher for the HMP diet. Feeding either linseed or hempseeds contributed to the reduction of the atherogenic and thrombogenic indices, increased the hypocholesterolemic: hypercholesterolemic ratio as well as the proportion of other desired fatty acids in the milk fat. The improved nutritional quality of milk, which has potentially far-reaching human health benefits, is maintained in cheese through the increase of the n3 and n6-PUFAs, especially for the LIN diet where the n6/n3 ratio decreased significantly, compared with the CON diet (3.62 vs. 6.88). The CLA concentration was significantly higher (p &lt; 0.001) for the HMP cheese compared with the CON diet (1.89% vs. 0.78%). These effects highlight the opportunity of obtaining dairy products with improved nutritional quality using local feed resources.

Optimizing Byproduct Processing for Clean Label Foods: Avocado and MSM‐Tambaqui With a Focus on Zero Waste

ABSTRACTAgricultural byproducts, often discarded, possess significant nutritional value and technological potential. This study investigates the efficacy of ethanolic‐water extracts from avocado (Persea americana Mill.) byproducts, obtained with minimal solvent use through optimized extraction, in enhancing the stability of mechanically separated meat‐tambaqui (Colossoma macropomum) burgers, a high‐fat Amazonian fish. 2000 ppm of avocado seed and peel extract were applied in shelf‐life tests conducted under refrigeration and freezing conditions to evaluate the stability of the burgers. The results demonstrated that the bioactive compounds from avocado byproducts resulted in lower TBARS values, indicating strong antioxidant properties, reduced formation of volatile nitrogen compounds, and color maintenance than sodium erythorbate. Monounsaturated fatty acids (MUFAs) and polyunsaturated fatty acids (PUFAs) were preserved using bioactive ethanolic‐water extracts, and the protein content was improved compared to the control, enhancing nutritional quality. This study highlights the potential of using agri‐food byproducts, especially for application in highly perishable items such as fish, promoting the development of clean label products, thus supporting a more efficient and environmentally friendly food industry focusing on the circular economy.

Effects of Polyunsaturated Fatty Acid/Saturated Fatty Acid Ratio and Different Amounts of Monounsaturated Fatty Acids on Adipogenesis in 3T3-L1 Cells.

(1) Background: Adipose tissue serves as a central repository for energy storage and is an endocrine organ capable of secreting various adipokines, including leptin and adiponectin. These adipokines exert profound influences on diverse physiological processes such as insulin sensitivity, appetite regulation, lipid metabolism, energy homeostasis, and body weight. Given the integral role of adipose tissue in metabolic regulation, it is imperative to investigate the effects of varying proportions and types of dietary fats on adipocyte function. In addition, our previous study showed that P/S = 5 and MUFA = 60% appeared to be beneficial in preventing white adipose tissue accumulation by decreasing plasma insulin levels and increasing hepatic lipolytic enzyme activities involved in β-oxidation. Therefore, the objective of this study was to explore the effects of a polyunsaturated fatty acid (PUFA) to saturated fatty acid (SFA) ratio of 5 and varying levels of monounsaturated fatty acids (MUFA = 30% or 60%) on lipogenesis. (2) Methods: We cultured 3T3-L1 mouse embryo fibroblasts in Dulbecco's modified Eagle's medium (DMEM) containing 10% bovine calf serum until confluent. Varying ratios of palmitic acid (PA), oleic acid (OA), and linoleic acid (LA) were first bound with bovine serum albumin (BSA) before being applied to 3T3-L1 adipocytes in low doses and in high doses. (3) Results: Low doses of P/S ratio = 5, MUFA = 60% (M60) fatty acids decreased the accumulation of triglycerides in mature adipocytes by decreasing the mRNA expression of adipogenic factors, such as peroxisome proliferator-activated receptors (PPARs), lipoprotein lipase (LPL), and glucose transporter-4 (GLUT-4), while increasing lipolytic enzyme (hormone-sensitive lipase, HSL) expression when compared to high doses of P/S ratio = 5, MUFA = 60% (M60), low and high doses of P/S ratio = 5, MUFA = 30% (M30). Furthermore, the treatment of M60 in low doses also decreased the secretion of leptin and increased the secretion of adiponectin in adipocytes. (4) Conclusions: The composition of P/S = 5, MUFA = 60% fatty acid in low doses appeared to result in anti-adipogenic effects on 3T3-L1 adipocytes due to the down-regulation of adipogenic effects and the transcription factor.

Intestinal Stearoyl-CoA Desaturase-1 Regulates Energy Balance via Alterations in Bile Acid Homeostasis

Background and AimsStearoyl-CoA desaturase-1 (SCD1) converts saturated fatty acids into monounsaturated fatty acids and plays an important regulatory role in lipid metabolism. Previous studies have demonstrated that mice deficient in SCD1 are protected from diet-induced obesity and hepatic steatosis due to altered lipid assimilation and increased energy expenditure. Previous studies in our lab have shown that intestinal SCD1 modulates intestinal and plasma lipids and alters cholesterol metabolism. Here we investigated a novel role for intestinal SCD1 in the regulation of systemic energy balance. MethodsTo interrogate the role of intestinal SCD1 in modulating whole body metabolism, intestine- specific Scd1 knockout (iKO) mice were maintained on standard chow diet or challenged with a high-fat diet (HFD). Studies included analyses of bile acid content and composition, metabolic phenotyping including body composition, indirect calorimetry, glucose tolerance analyses, quantification of the composition of the gut microbiome, and assessment of bile acid signaling pathways. ResultsIKO mice displayed elevated plasma and hepatic bile acid content and decreased fecal bile acid excretion, associated with increased expression of the ileal bile acid uptake transporter, Asbt. In addition, the alpha and beta diversity of the gut microbiome was reduced in iKO mice, with several alterations in microbe species being associated with the observed increases in plasma bile acids. These increases in plasma bile acids were associated with increased expression of TGR5 targets, including Dio2 in brown adipose tissue and elevated plasma glucagon-like peptide-1 levels. Upon HFD challenge, iKO mice had reduced metabolic efficiency apparent through decreased weight gain despite higher food intake. Concomitantly, energy expenditure was increased, and glucose tolerance was improved in HFD-fed iKO mice. ConclusionOur results indicate that deletion of intestinal SCD1 has significant impacts on bile acid homeostasis and whole-body energy balance, likely via activation of TGR5.

The effects of trophic mode and medium composition on the biochemical profile and antioxidant capacity of Tetraselmis chuii (CCAP 66/21B)

Microalgal cultivation influences the bioaccumulation of high-value compounds such as omega-3 (ω-3) fatty acids and carotenoid pigments. Therefore, cultivation optimisation is essential to upregulate high-value compound yields. The present study investigated the effects of trophic mode (autotrophy, heterotrophy and mixotrophy) and media composition on the biochemical make-up, pigment signature, fatty acid profile, and antioxidant capacity of the marine chlorophyte, Tetraselmis chuii (CCAP 66/21 B). The 13 conditions significantly affected the biochemical profile of T. chuii (CCAP 66/21 B) with high variation in carbohydrates (78.5–151.7 mg glucose eq g−1dw), lipids (208.3–475.1 mg g−1dw) and soluble proteins (47.3–373.9 mg BSA eq g−1dw). Trophic mode influenced the yields of high-value nutraceutical carotenoids (lutein and β-carotene) with the highest returns observed in photoautotrophic conditions (e.g., 2.51 ± 0.11 mg β-car g−1dw and 1.96 ± 0.14 mg lut g−1dw for K medium). Organic supplementation also induced significant shifts in the proportions of polyunsaturated fatty acids (ω-3 and ω-6 PUFAs), monounsaturated fatty acids (MUFAs) and saturated fatty acids (SFAs). Here, heterotrophy and mixotrophy significantly upregulated MUFA content (33.2 ± 4.0%) and SFA content (31.29 ± 0.9%), respectively. Moreover, mixotrophy significantly enhanced biomass yield (6.3-fold), soluble protein content (3.9-fold) and the antioxidant capacity (5.2-fold) of T. chuii (CCAP 66/21 B) compared to obligate photoautotrophy and heterotrophy. As such, trophic mode is a principal growth parameter that can modulate the content of T. chuii (CCAP 66/21 B) for potential downstream applications such as biofuels, pharmaceuticals, nutracurticals or aquaculture probiotics.

Therapeutic effects of high monounsaturated fatty acid and low carbohydrate formula on blood glucose levels and diarrhea in critically ill neurological patients

To investigate the effects of using a high monounsaturated fatty acid (MUFA) and low carbohydrate formula on blood glucose levels and diarrhea treatment effects in critically ill neurological patients. A self-controlled before-and-after study design was employed, with 13 patients admitted to the neurology intensive care unit (ICU) of the First Affiliated Hospital of Sun Yat-sen University from November to December 2023, who were treated with a high MUFA and low carbohydrate formula [Glucerna enteral nutrition (EN) preparation]. Changes in blood glucose parameters within 7 days before and after the use of Glucerna EN preparation were analyzed, including standard deviation (SD) of blood glucose, mean blood glucose (MG), median blood glucose, mean amplitude of glycemic excursions (MAGE), largest amplitude of glycemic excursions (LAGE), coefficient of variation (CV) of blood glucose, the incidence of hyperglycemia (> 7.8 mmol/L) and severe hyperglycemia (> 13.9 mmol/L), and daily insulin dose. Changes in total protein (TP), albumin (ALB), hemoglobin (Hb), C-reactive protein (CRP), and white blood cell count (WBC) were observed before and after intervention. Improvement in diarrhea symptoms, Hart diarrhea score, Bristol Stool classification score, and incontinence dermatitis classification were also analyzed before and after the use of Glucerna EN preparation. A total of 13 critically ill neurological patients were enrolled, among whom 9 patients had a history of hyperglycemia and 8 patients had diarrhea symptoms. After intervention with Glucerna, the patients' SD of blood glucose, MG, median blood glucose, MAGE, LAGE, CV of blood glucose, incidence of hyperglycemia, incidence of severe hyperglycemia, and daily insulin dose were all lower than those before the intervention [SD of blood glucose (mmol/L): 1.83±1.11 vs. 2.10±1.13, MG (mmol/L): 8.87±2.03 vs. 9.75±1.37, median blood glucose (mmol/L): 9.12±1.67 vs. 10.17±0.48, MAGE (mmol/L): 0.66±0.31 vs. 0.78±0.32, LAGE (mmol/L): 4.95±3.64 vs. 5.58±3.10, CV of blood glucose: 16.00% (11.00%, 28.50%) vs. 18.00% (12.50%, 27.50%), hyperglycemia incidence: 47.31% vs. 74.66%, severe hyperglycemia incidence: 6.08% vs. 6.71%, daily insulin dose (U): 5.25 (0.00, 32.59) vs. 20.76 (0.00, 66.88)], with a significant decrease in daily insulin dose after the intervention (P < 0.05); TP, ALB, Hb, CRP and WBC showed no significant changes before and after the intervention with Glucerna EN preparation. The improvement time of diarrhea symptoms after intervention was (3.50±1.41) days, and the Hart diarrhea score on the seventh day after intervention (4.88±3.48 vs. 10.00±3.38) and the Bristol Stool classification score on the third and seventh days after intervention (5.87±0.35, 5.50±0.53 vs. 6.50±0.53) were significantly lower than before the intervention (all P < 0.05). Before the intervention with Glucerna EN preparation, the classification of incontinence dermatitis was mainly classified as Grade 2 severity (71.43%); after the intervention, it significantly improved by the seventh day, with Grade 1 being the main classification (57.14%). The high MUFA and low carbohydrate formula has a positive effect on blood glucose control and diarrhea treatment in critically ill neurological patients.

Salidroside sensitizes Triple-negative breast cancer to ferroptosis by SCD1-mediated lipogenesis and NCOA4-mediated ferritinophagy

IntroductionTriple-negative breast cancer (TNBC) is the primary cause of breast cancer-induced death in women. Literature has confirmed the benefits of Salidroside (Sal) in treating TNBC. However, the study about potential therapeutic targets and mechanisms of Sal-anchored TNBC remains limited. ObjectiveThis study was designed to explore the main targets and potential mechanisms of Sal against TNBC. MethodsNetwork pharmacology, bioinformatics, and machine learning algorithm strategies were integrated to examine the role, potential targets, and mechanisms of the Sal act in TNBC. MDA-MB-231 cells and tumor-bearing nude mice were chosen for in vitro and in vivo experimentation. Cell viability and cytotoxicity were determined using CCK-8, LDH test, and Calcein-AM/PI staining. Antioxidant defense, lipid peroxidation, and iron metabolism were explored using glutathione, glutathione peroxidase, malondialdehyde (MDA), C11-BODIPY 581/591 probe, and FerroOrange dye. Glutathione peroxidase 4 (GPX4) or stearoyl-CoA desaturase 1 (SCD1) overexpression or nuclear receptor co-activator 4 (NCOA4) deficiency was performed to demonstrate the mechanism of Sal on TNBC. ResultsThe prediction results confirmed that 22 ferroptosis-related genes were identified in Sal and TNBC, revealing that the potential mechanism of the Sal act on TNBC was linked with ferroptosis. Besides, these genes were mainly involved in the mTOR, PI3K/AKT, and autophagy signaling pathway by functional enrichment analysis. The in vitro validation results confirmed that Sal inhibited TNBC cell proliferation by modulating ferroptosis via elevation of intracellular Fe2+ and lipid peroxidation. Mechanistically, Sal sensitized TNBC cells to ferroptosis by inhibiting the PI3K/AKT/mTOR axis, thereby suppressing SCD1-mediated lipogenesis of monounsaturated fatty acids to induce lipid peroxidation, additionally facilitating NCOA4-mediated ferritinophagy to increase intracellular Fe2+ content. The GPX4 or SCD1 overexpression or NCOA4 deficiency results further supported our mechanistic studies. In vivo experimentation confirmed that Sal is vital for slowing down tumor growth by inducing ferroptosis. ConclusionsOverall, this study elucidates TNBC pathogenesis closely linked to ferroptosis and identifies potential biomarkers in TNBC. Meanwhile, the study elucidates that Sal sensitizes TNBC to ferroptosis by SCD1-mediated lipogenesis and NCOA4-mediated ferritinophagy, regulated by PI3K/AKT/mTOR signaling pathways. Our findings provide a theoretical basis for applying Sal to treat TNBC.

Lipidome and proteome analyses provide insights into Mariana Trench Snailfish (Pseudoliparis swirei) adaptation to the hadal zone

The hadal zone environment, characterized by extreme hydrostatic pressure, low temperatures, and limited food availability, presents substantial survival challenges for deep-sea fish species. In this study, we captured five deep-sea fish species (Bathysaurus mollis, Coryphaenoides rudis, Ilyophis sp., I. brunneus and Pseudoliparis swirei) from the Mariana Trench at depths ranging from 2027 to 7125 ​m, by employing China's “Exploration I and Exploration II”. By combining lipidomic and proteomic analyses, we aimed to explore the genetic basis of adaptive evolution to the hadal zone in fish. The results indicate several key findings: (1) P. swirei (Mariana hadal snailfish, MHS) may enhance energy storage and utilization during prolonged fasting periods by significantly increasing liver tissue levels of cholesterol ester (CE), ether-linked triacylglycerol (TG-O), coenzyme Q (CoQ), and ATPase content; (2) MHS could maintain membrane fluidity under high pressure by increasing the proportion of unsaturated fatty acids while reducing levels of cholesterol and phosphatidylethanolamine (PE) content. (3) The regulation of lipid types and ratios could increase the risk of lipid peroxidation. To counter oxidative stress, MHS likely elevates monounsaturated fatty acid content and enhances antioxidants such as transferrin and heat shock proteins. Overall, this study provides new insights into the adaptive mechanisms of MHS to deep-sea conditions through the lipidome and proteome analyses, thus broadening our understanding of its resilience in the hadal zone.

Mitigation of polycyclic aromatic hydrocarbons (PAHs) in roasted beef patties by cold plasma treatment and products quality evaluation

The cold plasma (CP) technique was applied to alleviate the contamination of polycyclic aromatic hydrocarbon (PAH) in this investigation. Two different CP treatments methods were implemented in the production of beef patties, to investigate their inhibition and degradation capacity on PAHs. With 5 different cooking oils and fats addition, the inhibition mechanism of in-package cold plasma (ICP) pretreatment was explored from the aspect of raw patties fatty acids composition variation. The results of principal component analysis showed that the first two principal components accounted for more than 80 % of the total variation in the original data, indicating that the content of saturated fatty acids was significantly positively correlated with the formation of PAHs. ICP pretreatment inhibited the formation of PAHs by changing the composition of fatty acids, which showed that the total amount of polyunsaturated fatty acids decreased and the total amount of monounsaturated fatty acids increased. Sensory discrimination tests demonstrated there were discernable differences between 2 CP treated samples and the controls, utilization of the ICP pretreatment in meat products processing was expected to achieve satisfying eating quality. In conclusion, CP treatment degraded PAHs through stepwise ring-opening oxidation in 2 reported pathways, the toxicity of PAHs contaminated products was alleviated after CP treatment.