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Injection of lipopolysaccharide (LPS), a product of gut bacteria, into the blood increases blood triglycerides and cortisol, an appetite-stimulating hormone. Meanwhile, small amounts of LPS derived from gut bacteria are thought to enter the bloodstream from the gut in daily basis. This study aimed to investigate the effect of LPS influx on appetite or lipid metabolism in humans in everyday life. We measured the fasting plasma LPS concentration before breakfast and the corresponding days' appetite and fat-burning markers for 10 days in four Japanese males (28-31 years) and analyzed the correlation of their inter-day variation. The LPS concentration was negatively correlated with fullness, and positively correlated with the carbohydrate intake. Against our hypothesis, the LPS concentration was positively correlated with the fasting breath acetone concentration, a fat-burning marker. There was a positive correlation between the LPS concentration and fasting body mass index (BMI), but the inter-day variation in BMI was slight. The results suggest that the LPS influx in everyday life is at least associated with appetite in the day.
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http://dx.doi.org/10.3390/metabo13030395 | DOI Listing |
Environ Res
August 2025
School of Sport and Health Science, Tokai Gakuen University, Miyoshi 470-0207, Japan.
Background: There is little information regarding the concentrations and variability of methylmercury (MeHg) in breast milk. This study examines the variations in the concentrations of total mercury (THg), MeHg, and inorganic mercury (IHg) in breast milk and suggests a method for collecting breast milk samples for MeHg research.
Methods: Breast milk samples were obtained from 11 lactating women, 3-5 months after birth.
J Chromatogr A
October 2025
Laboratory of Pharmaceutical Analysis, Department of Pharmacy, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece. Electronic address:
Sample preparation of complex matrices is commonly performed using either liquid-based or sorbent-based extraction techniques, which have been developed and utilized in numerous variations. Pipette-tip microextraction is a relatively recent technique that has proven to be an effective approach for sample preparation. Various materials have been utilized in this technique including monoliths, silica-based, paper-based, functionalized-inner wall pipette tips and nature-derived materials.
View Article and Find Full Text PDFJ Chromatogr A
October 2025
Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China. Electronic address:
Glycidol, 3-chloropropane-1,2-diol (3-MCPD), and 2-chloropropane-1,3-diol (2-MCPD), known as thermal processing contaminants, have been identified in heated tobacco product (HTP) aerosol, raising significant health concerns. Therefore, it is necessary to establish a quantitative analytical method for the release of them. In this study, ethyl acetate was used to extract the aerosol of HTP collected by Cambridge filter pad (CFP), the extract was derivatized with heptafluorobutyrylimidazole (HFBI), washed and dried before being analyzed by gas chromatography-mass spectrometry (GC-MS).
View Article and Find Full Text PDFAnal Methods
August 2025
Institute of Public Health, Guangzhou Medical University & Guangzhou Center for Disease Control and Prevention, Guangzhou, 510440, China.
Arsenic is a widely studied toxic element that exists in various species with different oxidation states and forms in the environment and biological systems. The different physicochemical properties, environmental behaviors, and toxicities of these arsenic species make speciation analysis essential for environmental monitoring and human health risk assessment. In this study, we demonstrated the determination and monitoring of six arsenic species, including arsenite (AsIII), arsenate (AsV), monomethylarsonic acid (MMA), dimethylarsinic acid (DMA), arsenocholine (AsC), and arsenobetaine (AsB) in seafood using high-performance liquid chromatography coupled with inductively coupled plasma mass spectrometry (HPLC-ICP-MS).
View Article and Find Full Text PDFMolecules
August 2025
Hospital for Nervous and Mental Diseases, Skarszewska 7, 83-200 Starogard Gdanski, Poland.
(1) Background: The concentration of lamotrigine, an antiepileptic drug very often used in bipolar disorder, is most often determined in the blood, with many inconveniences. An alternative may be to use saliva as a diagnostic material for this purpose. The development of a method to determine lamotrigine in saliva as a biological material significantly improves patient comfort during sampling.
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