Glycerophospholipid Metabolism Pathway Research Articles

Astragaloside IV alleviates diabetic nephropathy by modulating the kidney-gut axis AMPK/PI3K/AKT pathway

Diabetic nephropathy (DN) is a severe complication of diabetes characterized by altered metabolic pathways. Astragaloside IV, a bioactive compound derived from Astragalus membranaceus, has shown potential therapeutic effects in various diseases. This study aims to investigate the protective effects of Astragaloside IV on DN through histomorphological, metabolomic, molecular biological, and gut flora-renal axis approaches. Serum metabolomics analyses were conducted to identify changes in metabolic pathways, focusing on glycerophospholipid metabolism and bile acid metabolism. Additionally, the activation of the AMPK/PI3K/AKT signaling pathway in kidney were examined. The impact of Astragaloside IV on the gut flora-renal axis was assessed by analyzing the relative abundance of specific gut microbiota and their correlations with metabolic parameters. Serum metabolomics analyses revealed significant alterations in glycerophospholipid and bile acid metabolism pathways. Astragaloside IV treatment activated the AMPK/PI3K/AKT signaling pathway, regulate glycolipid metabolism and mitochondrial damage to improve kidney injury. Moreover, Astragaloside IV modulated the relative abundance of gut microbiota, notably increasing Muribaculaceae and Alloprevotella. The relative abundance of Bacteroidota was positively correlated with high-density lipoprotein (HDL) levels and negatively correlated with fasting blood glucose (FBG) and low-density lipoprotein (LDL) levels. Astragaloside IV exerts protective effects against DN by improving the intestinal microenvironment and activating the AMPK/PI3K/AKT signaling pathway in kidney. These findings highlight the therapeutic potential of Astragaloside IV and suggest the efficacy of gut-liver axis mediated therapies for the treatment of DN.

Ultra-High-Performance Liquid Chromatography-Orbitrap-MS-Based Untargeted Lipidomics Reveal Lipid Characteristics of a Clinical Strain of Mycoplasma bovis from Holstein Cow.

Mycoplasma bovis is a global concern for the cattle industry owing to its high rates of infection and resulting morbidity, but there are no reports on the lipid composition and metabolic pathways. This study examined the lipidomics of M. bovis to better investigate the biological characteristics of clinical isolates of M. bovis. The M. bovis strains NX114 and PG45, cultivated to log-phase, underwent untargeted lipidomics via ultra-high-performance liquid chromatography-mass spectrometry for differential analysis. Over 65 lipid types and 1476 lipid molecules were identified. We found that glycerophospholipids and sphingolipids constitute the predominant lipid components of M. bovis, with significant constituents of its cell membrane comprising ceramides, phosphatidylglycerols, sphingomyelins, triacylglycerols, hexosylceramides, ether-linked oxidized phosphatidylcholines, and oxidized phosphatidylglycerols. Secondly, 562 differentially expressed lipid molecules were identified, including 17 lipid subclasses (15 up-regulated and 2 down-regulated) with significant differences in relative content. These findings indicate that distinct M. bovis isolates contain structurally varied lipid molecules, with sphingomyelin, phosphatidylinositol, cardiolipin, and phosphatidylcholine being characteristic lipids. The glycerophospholipid metabolism pathway was identified as a key pathway regulating lipid metabolism in M. bovis by KEGG pathway enrichment analysis. The results indicated alterations in the lipid metabolism of M. bovis, offering insights into its pathogenic mechanisms.

Combined Transcriptomic and Metabolomic Analyses Reveal the Mechanisms by Which the Interaction Between Sulfur and Nitrogen Affects Garlic Yield and Quality

Nitrogen and sulfur are essential macronutrients in plant growth and development, and their interaction profoundly influences gene expression, metabolic activities, and adaptability in plants, directly affecting plant growth and yield. Garlic (Allium sativum L.) is a crop of significant economic and medicinal value. However, despite the critical role of the nitrogen–sulfur interaction in garlic’s adaptability, yield, and quality, the specific mechanisms underlying these effects remain unclear. In this study, transcriptomic and metabolomic analyses were employed to investigate the effects of combined sulfur and nitrogen application on garlic bulb tissues. The results show that the combined application of sulfur and nitrogen significantly increased the diameter and weight of garlic bulbs by 14.96% and 35.47%, respectively. The content of alliin increased by 28.48%, while the levels of abscisic acid (ABA), jasmonic acid (JA), salicylic acid (SA), and gibberellin (GA) increased by 15.82%, 12.94%, 32.34%, and 48.13%, respectively. Additionally, the activities of alliinase, superoxide dismutase (SOD), and catalase (CAT) were enhanced by 7.93%, 4.48%, and 19.74%, respectively. Moreover, the application of sulfur and nitrogen significantly reduced the malondialdehyde (MDA) content and peroxidase (POD) activity in garlic bulbs by 29.66% and 9.42%, respectively, thereby improving garlic’s adaptability and growth potential. Transcriptomic analysis revealed differentially expressed genes in several key pathways, including plant hormone signal transduction, RNA degradation, glutathione metabolism, amino acid biosynthesis, and glycerophospholipid metabolism. Metabolomic analysis identified 80 differentially abundant metabolites primarily consisting of amino acids, indole carboxylic acids, and fatty acids. The integrated transcriptomic and metabolomic analyses highlighted the pivotal roles of glutathione metabolism, glycerophospholipid metabolism, and amino acid biosynthesis pathways in the synergistic effects of sulfur and nitrogen. This study not only provides critical scientific evidence for understanding the mechanisms underlying the nitrogen–sulfur interaction’s impact on the yield and quality of garlic but also offers a scientific basis for optimizing nutrient management strategies to enhance garlic yield and quality.

A global lipid map of severe fever with thrombocytopenia syndrome virus infection reveals glycerophospholipids as novel prognosis biomarkers.

This study systematically investigated the lipid landscape profile of SFTS-infected patients with different clinical outcomes. Our results revealed a global alteration in the lipid signature, particularly the glycerophospholipid metabolic pathway, induced by SFTSV infection. Notably, LysoPC (20:0) and LysoPC (P-16:0) presented remarkable prognostic value as novel biomarkers for SFTSV infection and may contribute to the prognosis of SFTS progression and appropriate interventions.

Effects of L-arginine on gut microbiota and muscle metabolism in fattening pigs based on omics analysis.

L-arginine is an α-amino acid and a semi-essential nutrient of significant biological interest. It plays a role in influencing various aspects of animal meat traits, gut microbiota composition, and physiological metabolism. This study aimed to investigate the combined effects of L-arginine supplementation on gut microbiota composition and the metabolism of the longissimus dorsi muscle in fattening pigs. Eighteen Yorkshire commercial pigs were divided into two groups: a control group that received no supplements and a treatment group that was given 1% L-arginine for 52 days. The diversity and composition of microorganisms in the feces of the control (NC) and L-arginine (Arg) groups were analyzed by sequencing the 16S rRNA V3 -V4 region of the bacterial genome. The findings indicated that L-arginine supplementation increased both the abundance and diversity of gut microbiota, particularly affecting the Firmicutes and Bacteroidetes phyla. KEGG enrichment analysis revealed significant changes in several metabolism-related pathways, including amino acid, carbohydrate, and lipid metabolism. Metabolomic analysis identified 85 differential metabolites between the arginine and control groups, with phospholipids ranking among the top 20. Additionally, functional predictions indicated an increased abundance in the glycerophospholipid metabolism pathway. Correlation analysis linked changes in gut microbiota to phospholipid levels, which subsequently influenced post-slaughter meat color and drip loss. These results suggest that L-arginine supplementation positively impacts gut microbiota composition and the metabolic profile of the longissimus dorsi muscle in fattening pigs, with potential implications for meat quality.

Tinosporae Radix attenuates acute pharyngitis by regulating glycerophospholipid metabolism and inflammatory responses through PI3K-Akt signaling pathway.

With the onset of the COVID-19 pandemic, the incidence and prevalence of acute pharyngitis (AP) have increased significantly. Tinosporae Radix (TR) is a vital medication utilized in the treatment of pharyngeal and laryngeal ailments, especially AP. The study endeavors to explore unclear molecular mechanisms of TR in addressing AP. Network pharmacology and metabolomics analyses of effect of TR on AP were conducted, and apossible pathway was validated both in vivo using the acute pharyngitis rat model and in vitro using the LPS-induced RAW264.7 cells model, through techniques such as histopathological examinations, immunohistochemical technology, ELISA, RT-qPCR, and Western blotting to systematically explore the possible mechanisms underlying the inhibition of AP by TR. Network pharmacology analysis identified several key targets, including PIK3CA, IL6, AKT1, TNF, and PTGS2, alongside pivotal signaling pathways such as IL-17, TNF, Hepatitis B, nuclear factor kappa B (NF-κB), Influenza A, and the PI3K-Akt pathway. Most of them are closely associated with inflammation. Then, wide-target metabolomics analysis showed that TR downregulated substances within the glycerophospholipid metabolic pathway, and modulated the PI3K-Akt pathway. The integrated findings from network pharmacology and metabolomics underscored the pivotal role of the PI3K-Akt signaling pathway and the attenuation of inflammatory responses. Finally, in vitro and in vivo experiments have shown that TR can inhibit inflammatory factors such as IL-6, TNF - α, and COX-2, downregulate targets such as PI3K and AKT on the PI3K-Akt signaling pathway, and thereby alleviate the inflammatory response of AP. Our study demonstrated that TR exerts an anti-AP effect through suppression of release of inflammatory factors and modulation of glycerophospholipid metabolism via suppressing the PI3K-Akt signaling pathway.

Multi-omics analysis reveals the protective effects of Chinese yam polysaccharide against cisplatin-induced renal interstitial fibrosis

BackgroundChinese yam polysaccharide (SYDT) has been reported to protect renal function and mitigate renal fibrosis in mice with diabetic nephropathy. Based on a multi-omics analysis, the objectives of this study were to determine the effect of SYDT on cisplatin (CDDP)-induced chronic renal interstitial fibrosis (RIF) and the underlying molecular mechanisms using an in vivo model. MethodsRats were intraperitoneally injected with a single dose of CDDP and then treated with SYDT or amifostine (AMF). The levels of urinary N-acetyl-β-D-glucosaminidase (NAG), blood urea nitrogen (BUN) and serum creatinine (Scr) were detected to assess renal function. Renal tissue damage and fibrosis were evaluated using hematoxylin and eosin (H&E) and Masson's trichrome staining, respectively. In addition, this study applied transcriptomics and metabolomics to predict the possible mechanism of SYDT action, which was verified by several relevant examinations. ResultsSYDT significantly protected the renal function, alleviated renal tissue damage and fibrosis, as well as decreased the protein levels of vimentin, α-SMA and CTGF, whereas SYDT significantly increased MMP-1 protein level in renal tissues from rats treated with CDDP. There were 1130 differently expressed genes (DEGs) between the CDDP model and SYDT-M groups proved by transcriptome analysis, indicating that metabolic pathways were likely the primary targets of relevance. Consistent with the transcriptome analysis, metabolome analysis identified 276 differentially expressed metabolites (DEMs) between the SYDT-M and CDDP model groups, with predominant clustering within glycerophospholipid metabolism. Integrative analysis of the transcriptome and metabolome indicated that SYDT inhibited the glycerophospholipid metabolism pathway by regulating the target genes Gpd2, Gpam, Agpat3, Lcat, and Pla2g4b. Notably, integrative analysis showed that the Phospholipase D (PLD) signaling pathway may be the most relevant target. Moreover, related signaling pathway analysis confirmed that SYDT inhibited CDDP-induced RIF in rats by down-regulating the PLD pathway. ConclusionOur study showed that the alleviation of CDDP-induced RIF in vivo can be achieved through the inhibition of glycerophospholipid metabolism and PLD signaling pathways by SYDT.

Metabolomics combined with network pharmacology revealed a paradigm for determining the mechanism underlying the metabolic action of Gegen Qinlian Decoction amelioration of ulcerative colitis in mice

Ulcerative colitis (UC) is a common disease of the digestive system that is challenging to treat. Gegen Qinlian Decoction (GQD), which is an ancient classic formula in Chinese medicine, is effective at alleviating the symptoms of UC, but comprehensive research on its mechanism of action has not been performed. Here, we explored the material basis and potential molecular mechanism underlying GQD-mediated protection against UC by integrated metabolomics and network pharmacology. First, differentially expressed metabolites were screened and identified via a metabolomics approach, and the metabolic pathway was analyzed via MetaboAnalyst. Second, a protein–protein interaction (PPI) network was constructed to identify hub genes that encode metabolic enzymes. Third, the differentially expressed metabolites were used to construct a compound-reaction-enzyme-gene network. Finally, the metabolites were compared with relevant active components for molecular docking, molecular dynamics (MD) simulation, and verification experiment. GQD intervention alleviated UC in mice and significantly inhibited metabolic dysfunction in mice with UC; specifically, GQD reversed the abnormal changes in metabolites in the colon and serum, and regulated the arachidonic acid metabolism, tryptophan metabolism, glycerophospholipid metabolism, and purine metabolism pathways. Further literature review and molecular docking analysis with targeted MD simulation and Poisson-Boltzmann surface area (MM-PBSA) analysis were performed, revealing that GQD may inhibit the disruption of arachidonic acid metabolism and tryptophan metabolism by suppressing PTGS2 and CYP450 protein expression; these results were verified by qRT-PCR, WB, and surface plasmon resonance (SPR) assays. Our experiments indicated that GQD alleviated UC in mice by systematically regulating arachidonic acid metabolism and tryptophan metabolism, supporting further research and the development of GQD as a novel drug for ameliorating UC.

Comparative Lipidomics Analysis Provides New Insights into the Metabolic Basis of Color Formation in Green Cotton Fiber.

Green fiber (GF) is a naturally colored fiber. A limited understanding of its color formation mechanism restricts the improvement of colored cotton quality. This experiment used upland cotton green fiber germplasm 1-4560 and genetic inbred line TM-1; the lipid profiles of green fibers at 30 (white stage) and 35 days post-anthesis (DPA) (early greening stage), as well as those of TM-1 at the same stages, were revealed. Among the 109 differential types of lipids (DTLs) unique to GF, the content of phosphatidylserine PS (16:0_18:3) was significantly different at 30 and 35 DPA. It is speculated that this lipid is crucial for the pigment accumulation and color formation process of green fibers. The 197 DTLs unique to TM-1 may be involved in white fiber (WF) development. Among the shared DTLs in GF35 vs. GF30 and WF35 vs. WF30, sulfoquinovosyldiacyl-glycerol SQDG (18:1_18:1) displays a significant difference in the content change between green fibers and white fibers, potentially affecting color formation through changes in content. The enriched metabolic pathways in both comparison groups are relatively conserved. In the most significantly enriched glycerophospholipid metabolic pathway, 1-acyl-sn-glycero-3-phosphocholine (C04230) only appears in white cotton. This indicates differences in the metabolic pathways between white and green fibers, potentially related to different mechanisms of color formation and fiber development. These findings provide a new theoretical basis for studying cotton fiber development and offer important insights into the specific mechanism of green fiber color formation.

Lipidomics reveals the effects of various processing parameters on the lipid composition and activity of roasted coffee oil

Lipids are an important part of the roasting and extraction of coffee, as they impart flavor and aroma to the coffee while it is roasting. Here, coffee oil was extracted from roasted coffee beans, and several ethanol extraction (EE), ultrasound extraction (UE), microwave extraction (ME), and ultrasonic-enzyme extraction (UME) treatments were performed. The oils from the UME group were better in terms of color, acid value, peroxide value, tocopherol content, and other indicators. Glycerolipids, glycerophospholipids, and sphingolipids were evaluated in the three groups via coffee oil analysis via quantitative lipidomics. The sphingolipid and glycerophospholipid metabolic pathways showed considerable lipid enrichment when the identified differential lipids were subjected to metabolic pathway enrichment. Coffee oils subjected to various processing techniques showed substantial changes, as determined by multivariate regression; significantly different lipids were identified as candidate biomarkers. The production of coffee goods can benefit from these new insights into the extraction and application of coffee oil.

Metabolomic changes in preterminal serum samples of rhesus macaques exposed to two different lethal doses of total-body gamma-radiation

Exposure to ionizing radiation induces cellular and molecular damage leading to a cascade of events resulting in tissue and organ injury. Our study strives to characterize and validate metabolomic changes in preterminal stage (immediately prior to death) samples collected from rhesus macaques lethally irradiated with one of two different doses of radiation. Peripheral blood samples were collected pre-exposure, post-exposure, and at the preterminal stage of nonhuman primates (NHPs that did not survive exposure with 7.2 Gy or 7.6 Gy total-body radiation (LD60-80/60)). We analyzed global metabolomic alterations using ultra-performance liquid chromatography (UPLC) quadrupole time-of-flight mass spectrometry (QTOF-MS) in serum samples collected at various timepoints in relation to radiation exposure. The goal of this study was to validate the metabolic shifts present in samples collected just prior to death, which were reported earlier in a preliminary study with a limited number of samples and a single dose of radiation. Here, we demonstrate that radiation exposure induced significant time-dependent metabolic alterations compared with pre-exposure samples. We observed significant metabolite dysregulation in animals exposed to 7.6 Gy compared to 7.2 Gy. Greater metabolic disruption was observed in the preterminal groups than all of the other post-irradiation timepoints in both cohorts. Metabolomic shifts in these preterminal groups also revealed consistent disturbances in sphingolipid metabolism, steroid hormone biosynthesis, and glycerophospholipid metabolism pathways. Overall, the sphingolipid metabolism pathway appears to be representative of the preterminal phenotype, confirming the results of our preliminary study. These results offer important and novel insights for identification and validation of biomarkers for lethality, and such observations would be valuable for triage during a radiological/nuclear mass casualty scenario.

Integrative multiomics analysis identifies key genes regulating intramuscular fat deposition during development

Intramuscular fat (IMF) content is an important indicator of livestock and poultry meat quality. Enhancing IMF deposition can significantly improve meat quality. Focusing on the core process of IMF deposition, this study used the Jingxing Yellow (JXY) chickens as a model organism and employed multi-omics approaches, including RNA-sequencing (RNA-seq), Whole-genome bisulfite sequencing (WGBS), and metabolomics, to identify the key genes influencing IMF deposition in chickens during development. The results indicated that the contents of triglycerides (TG) and phospholipids (PLIP) exhibited an upward trend. The TG content did not differ significantly between day 1 (D1) and day 7 (D7), but increased significantly after 35 days (D35) of age. The WGBS results revealed that CpG methylation was the predominant methylation type in the breast muscle tissue of JXY chickens. Integrative analysis of RNA-seq and WGBS identified 50 genes, including PLA2G4F, PALMD, PLSCR5, ARHGEF26, LUM, DCN, TNRC6B, CACNA1C, ROBO1, and MBTPS2, whose methylation levels were significantly negatively correlated with their expression levels. In addition, the combined Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis of differentially-expressed metabolites (DEM) and differentially-expressed genes (DEG) converged on the glycerophospholipid metabolism pathway, which was significantly enriched in DEGs such as PLA2G4F, PLA2G15, LPIN1, MBOAT2, DGKH, AGPAT2, and CHKA, as well as DEM like glycerophosphocholine and phosphocholine. Notably, PLA2G4F was identified as a DEG by DNA methylation, suggesting that PLA2G4F could be a key candidate gene influencing IMF deposition during chicken development. These findings are expected to provide a solid theoretical foundation for improving meat quality through targeted genetic and epigenetic interventions.

Serum untargeted metabolomics analysis of mice after myocardial infarction affected by qiliqiangxin capsule

Qiliqiangxin (QLQX) capsule consists of 11 herbs, namely Huang qi (astragalus membranaceus), Ren shen (ginseng), Fu zi (radix aconiti carmichaeli), Dan shen (salvia miltiorrhiza), Ting li zi (lepidium seed), Ze xie (rhizoma alismatis), Yu zhu (radix polygonati officinalis), Gui zhi (cassia twig), Hong hua (carthamus tinctorious), Xiang jia Pi (cortex periplocae), Chen Pi (pericarpium citri reticulatae), and it is a standardized commercial formula designed to address yang deficiency and to restore the balance of qi in the heart. QLQX is also known to invigorate the blood and promote the circulation of the blood and to promote the use of fluids to relieve water retention and edema, and can be used in cardiovascular diseases such as mild to moderate congestive heart failure resulting from coronary artery disease and hypertension. The further research on the effect of QLQX on cardiac function in mice after myocardial infarction was manipulated. QLQX was given to mice in myocardial infarction model by gavage with appropriate dosage and the samples were analyzed at the end of the animal experiments through the UHPLC-Q-Exactive LC-MS. The liquid mass spectrometry was used to collect and followed by further analysis of the corresponding metabolites and metabolic pathways using metabolomics analysis. As a result, 9 differential metabolites were identified, with 15 being up-regulated and 4 down-regulated following intervention with QLQX. Then the metabolic pathways by KEGG enrichment pathway bubble diagram was analyzed, and 4 metabolic pathways were obtained, and combined with the metabolites that had been screened and analyzed together, finally the two differential metabolites, 2,5-Dihydroxybenzenesulfonic Acid and o-Cresol sulfate were found. The Glycerophospholipid metabolism pathway was closely related to the remaining seven differential metabolites, and the pathway might be an important pathway related to the effects of QLQX on cardiac function in mice.

Phloridzin prevents diabetic cardiomyopathy by reducing inflammation and oxidative stress

Oxidative stress and inflammation significantly contribute to the pathogenesis of diabetic cardiomyopathy (DCM). Persistent inflammatory stimuli drive the progression of myocardial fibrosis and impaired cardiac function. Phloridzin (Phl), a natural compound, demonstrates both anti-inflammatory and antioxidant properties. Nevertheless, its therapeutic potential and underlying mechanisms in DCM remain unclear. This study aimed to elucidate the mechanisms through which Phl inhibited myocardial fibrosis and exerted its antioxidative effects. The impact of Phl on DCM was evaluated using a high-fat/high-sugar diet combined with streptozotocin to induce an animal model and an in vitro H9C2 cell model stimulated by high glucose (HG). Untargeted metabolomics identified potential mechanisms underlying myocardial fibrosis. Phl treatment significantly enhanced left ventricular ejection fraction (EF%) and shortening fraction (FS%), while reducing myocardial injury markers, such as lactate dehydrogenase and creatine phosphokinase-MB, and suppressing myocardial collagen fiber accumulation. Simultaneously, Phl attenuated myocardial inflammation via inhibition of MyD88/NF-κB signaling, modulated the Nrf2/GPX4 axis to counter oxidative stress, and mitigated ferroptosis. In vitro, Phl inhibited high glucose-induced myocardial hypertrophy and fibrosis in H9C2 cells, while also repressing NF-κB activation in cardiomyocytes. Metabolomic profiling revealed that Phl ameliorated DCM through modulation of glycerophospholipid metabolic pathways, linking these metabolic shifts to enhanced antioxidant capacity, thereby reflecting its ability to reduce oxidative stress in the myocardium. Collectively, Phl provides cardioprotective effects by alleviating inflammation and oxidative damage.

Integrated analysis of metabolomic and transcriptomic profiles elucidates the core role of glycerophospholipid metabolism in hypertension related to metabolic syndrome

BackgroundMetabolic syndrome (MetS) represents a comprehensive framework that encompasses conditions such as diabetes, hypertension (HBP), obesity, and dyslipidemia. MetS without hypertension significantly contributes to the development of refractory hypertension. However, the underlying molecular regulatory mechanisms of hypertension associated with MetS remain incompletely elucidated. The objective of this study was to identify differences in plasma metabolome and leukocyte transcriptome profiles between patients with MetS comorbid HBP compared to those with MetS with hypertension and HBP alone. MethodsIn this study, whole blood samples were collected from 104 participants, including patients with HBP, MetS without hypertension (MS), and MetS with hypertension (MS-HBP). Ultra-high-performance liquid chromatography was employed to perform metabolomic analysis of plasma samples. Comparative analysis was conducted to identify distinct metabolites among the three groups, while MetaboAnalyst 5.0 was utilized for enrichment and pathway analysis. Clinical correlation analysis and receiver operating characteristic analyses were applied to select biomarker metabolites for MS-HBP. Transcriptomic profiling of white blood cells was performed to identify dysregulated genes and KEGG/GO pathways. Integrative analysis of metabolomics and transcriptomics was used to construct molecular interaction networks. Finally, blood pressure was monitored every 2 weeks during the treatment period for experimental validation. ResultsThe metabolomic results indicated that lipid metabolic pathways, particularly glycerophospholipid metabolic pathways, played a crucial role in MS-HBP. The area under the curve of tryptophan-isoleucine for diagnosis in the MS-HBP group was 0.82. Tryptophyl-isoleucine demonstrated a negative correlation with both HbA1c and diastolic blood pressure. Transcriptomic analysis revealed the involvement of MS-HBP in numerous immune and inflammatory pathways. Furthermore, the integrated analysis of metabolomic and transcriptomic data emphasized the importance of glycerophospholipid metabolism in MS-HBP. PPC exhibited a comparable effect on lowering blood pressure in SHR rats. ConclusionThe findings of this study demonstrated that glycerophospholipid metabolism plays a pivotal role in the pathophysiological processes of MS-HBP, providing novel insights into early clinical diagnosis and the optimization of therapeutic strategies.

Ascorbic Acid Enhances the Inhibitory Effect of Theasaponins against Candida albicans

Candida albicans (C. albicans) is a main cause of hospital-acquired fungal infections. Combination therapy is promising as a novel anti-C. albicans strategy because of its better efficacy. Theasaponins are pentacyclic triterpenes in the Camellia genus with multiple biological activities. Our previous studies prove that theasaponins display inhibitory activity against C. albicans. Ascorbic acid (VC) is a vitamin found in many plants that shows potential in combination therapy. However, whether VC enhances the activity of theasaponins remains unclear. In this study, the checkerboard micro-dilution method was used to assess the effect of VC (0–80 mmol/L) on the anti-C. albicans effect of theasaponins (0–1000 μg/mL). Then, the effects of theasaponins (31.25 μg/mL), VC (80 mmol/L), and theasaponins (31.25 μg/mL) + VC (80 mmol/L) on C. albicans planktonic cells and different stages of biofilm formation were assessed. Transcriptomic analysis was conducted to investigate the molecular mechanisms. According to the results, VC enhanced the anti-planktonic and anti-biofilm effect of theasaponins against C. albicans. The minimum inhibitory concentration of theasaponins was significantly decreased and the fungicidal efficiency was increased with the addition of VC. VC remarkably aggravated the suppression of theasaponins with regard to various virulence factors of C. albicans, including adhesion, early biofilm formation, mature biofilm, cell surface hydrophobicity, and phospholipase activity. Compared with the theasaponins or VC groups, the level of intracellular reactive oxygen species was higher, while the levels of mitochondrial membrane potential and adenosine triphosphate were lower in the combination group, suggesting more severe oxidative stress, mitochondrial injury, and energy deficiency. Transcriptomic analysis revealed that the combination predominantly suppressed the pathways of glycolysis, glycerophospholipid metabolism, glutathione metabolism, and cysteine and methionine metabolism. This implied that energy deficiency and redox imbalance were associated with the anti-C. albicans activity of the combination. These results prove that VC enhances the inhibitory effect of theasaponins against C. albicans and that the combination has the potential to be used as a topical antifungal therapy or disinfectant.

Integrated Small Intestine Microbiota and Serum Metabolomics Reveal the Potential Mechanisms of Wine Steaming in Alleviating Rhubarb-Induced Diarrhea.

Long-term use of rhubarb (RH) commonly leads to diarrhea, which can be alleviated by steaming with wine. However, the specific mechanism by which wine steaming alleviates RH-induced diarrhea remains unknown. This study aims to reveal the underlying mechanisms of wine steaming in alleviating RH-induced diarrhea by examining small intestinal flora and serum metabolomics. Major anthraquinone and anthrone components were detected using ultra-performance liquid chromatography-mass spectrometry (UPLC-MS). Eighty-four ICR mice were randomly divided into control, RH, and RH steamed with wine (PRH) groups and were administered RH and PRH (1, 4, and 8 g/kg, i.g). for 14 consecutive days. Histopathological analysis was performed using hematoxylin-eosin staining. Levels of inflammatory factors and tight junction proteins, zonula occludens-1 (ZO-1) and occludin, in the small intestine were measured. The small intestine content was analyzed using 16S rRNA sequencing, and UPLC-MS was used to analyze endogenous metabolites. Levels of major anthraquinone and anthrone components decreased in PRH. Both RH and PRH groups showed varying degrees of loose stools and increased fecal water rates; the RH group exhibited more severe effects. Compared with the control group, RH caused small intestine injuries, increased levels of inflammatory cytokines, downregulated the expression of ZO-1 and occludin, and induced gut microbiota (GM) imbalance. The relative abundance of Lactobacillus decreased, while the relative abundance of Shigella and Streptococcus increased. However, PRH had a milder impact than RH. The glycerophospholipid metabolic pathway was involved in this effect. The levels of inflammatory cytokines and potential metabolites (sn-glycero-3-phosphoethanolamine) were positively correlated with Streptococcus infection, while the levels of ZO-1 and occludin were negatively correlated with Streptococcus infection. GM imbalance and abnormal glycerophospholipid metabolism contributed to impaired intestinal barrier function and inflammatory factor release, which may underlie RH-induced diarrhea, though PRH had a weaker effect. PRH alleviated RH-induced diarrhea by recovering GM balance, reducing ZO-1 and occludin expression, and decreasing the release of inflammatory factors. This mechanism may be linked to the reduced anthraquinone content. This study is the first to explore the mechanism of wine steaming in alleviating RH-induced diarrhea through small intestinal flora and serum metabolomics. It provides data to support the broader clinical use of RH and its safer application.

Glycerophospholipid-driven lipid metabolic reprogramming as a common key mechanism in the progression of human primary hepatocellular carcinoma and cholangiocarcinoma

Metabolic reprogramming, a key mechanism regulating the growth and recurrence of hepatocellular carcinoma (HCC) and cholangiocarcinoma (CCA), still lacks effective clinical strategies for its integration into the precise screening of primary liver cancer. This study utilized ultra-high-performance liquid chromatography with quadrupole time-of-flight mass spectrometry to conduct a comprehensive, non-targeted metabolomics analysis, revealing significant upregulation of lipid metabolites such as phosphatidylcholine and lysophosphatidylcholine in patients with HCC and CCA, particularly within the glycerophospholipid metabolic pathway. Hematoxylin and eosin and immunohistochemical staining demonstrated marked upregulation of phospholipase A2 in tumor tissues, further emphasizing the potential of lipid metabolism as a therapeutic target and its important part in the course of cancer. This work provides a new viewpoint for addressing the clinical challenges associated with HCC and CCA, laying the groundwork for the broad application of early diagnosis and personalized treatment strategies, and ultimately aiming to provide tailored and precise therapeutic options for patients.

Metabolism disruption induced by high ambient temperature

BackgroundPrevious studies have assessed the cardiovascular risk attributable to high ambient temperature. However, the mechanisms underly acute cardiovascular responses associated with high ambient temperature remain incompletely understood. ObjectiveTo identify acute cardiovascular responses associated with high temperature, and to understand the underlying mechanisms using metabolomics. MethodsWe conducted a prospective panel study on young adults, organizing participants to undergo blood collection and temperature monitoring tautologically. Levels of 10 cardiovascular biomarkers and 4473 serum metabolites were measured. Levels of ambient temperature exposure were recorded by wearing personal monitors. We employed linear mixed-effect models to identify acute cardiovascular responses associated with ambient temperature, including differential biomarkers and metabolites. KEGG pathway analysis was performed on the differential metabolites to identify temperature-associated metabolic processes. ResultsExposure to elevated ambient temperature was associated with acute cardiovascular responses, including alterations in high-density lipoprotein, interleukin-6, C-reactive protein, diastolic pressure, and heart rate. These observed acute cardiovascular responses are probably attributed to metabolism disturbances, as 129 differential serum metabolites, accompanied by disruptions in 18 pathways, were identified. These differential metabolites and pathways primarily involve glycerophospholipid metabolism, which activates inflammation cytokines and subsequently induces adverse cardiovascular effects. ConclusionsOur findings suggest that elevated ambient temperature could potentially lead to cardiovascular responses among young adults in China. We propose that high ambient temperature exposure may contribute to acute cardiovascular effects by regulating the glycerophospholipid metabolism pathway.

The molecular regulated mechanism of METTL3 and FTO in lipid metabolism of Hu sheep

BackgroundBalanced lipid metabolism can improve the growth performance and meat quality of livestock. The m6A methylation-related genes METTL3 and FTO play important roles in animal lipid metabolism; however, the mechanism through which they regulate lipid metabolism in sheep is unclear. ResultsWe established lipid deposition models of hepatocytes and preadipocytes in Hu sheep. In the hepatocyte lipid deposition model, the genes expression levels of FABP4, Accα, ATGL and METTL3, METTL14, and FTO—were significantly up-regulated after lipid deposition (P < 0.05). Transcriptomic and metabolomic analyses showed that lipid deposition had a significant effect on MAPK, steroid biosynthesis, and glycerophospholipid metabolism pathway in hepatocytes. The m6A methylation level decreased but the difference was not significant after METTL3 interference, and the expression levels of FABP4 and ATGL increased significantly (P < 0.05); the m6A methylation level significantly increased following METTL3 overexpression, and LPL and ATGL expression levels significantly decreased (P < 0.05), indicating that overexpression of METTL3 inhibited the expression of lipid deposition-related genes in a m6A-dependent manner. The m6A methylation level was significantly increased, ATGL expression was significantly decreased (P < 0.05), and LPL, FABP4, and Accα expression was not significantly changed following FTO interference (P > 0.05); the m6A methylation level was significantly decreased after FTO overexpression, and LPL, FABP4, and ATGL expression was significantly increased (P < 0.05), indicating that FTO overexpression increased the expression of lipid deposition-related genes in a m6A-dependent manner. Transcriptomic and metabolomic analyses showed that m6A methylation modification mainly regulated lipid metabolism through triglyceride metabolism, adipocytokine signaling, MAPK signaling, and fat digestion and absorption in hepatocytes. In the lipid deposition model of preadipocytes, the regulation of gene expression is the same as that in hepatocytes. ConclusionsMETTL3 significantly inhibited the expression of lipid deposition-related genes, whereas FTO overexpression promoted lipid deposition. Our study provides a theoretical basis and reference for accurately regulating animal lipid deposition by mastering METTL3 and FTO genes to promote high-quality animal husbandry.