Areca nut (Areca catechu L.) is a widely consumed food and medicinal plant with both nutritional value and documented health risks. To comprehensively…

Coccidiostats are veterinary drugs commonly used in poultry livestock to treat and prevent coccidiosis, a severe and widespread parasitic infections i…

Peptide hormone-based weight-loss therapeutics have gained increasing attention, driven amongst other reasons, by the clinical and commercial success …

Loss of function (LoF) of the ATP13A2 protein, a polyamines transporter, has been linked to lysosomal and mitochondrial dysfunctions that play an impo…

In this study, we addressed the longstanding challenge of elucidating the complex material basis of traditional Chinese medicine (TCM) formulas by establishing an integrated, multi-platform UHPLC-QTO...

Rationale Diamonds are generally considered to be metasomatic minerals originating from the Earth's mantle. They formed through the interaction of carbon-bearing fluids or melts with the surrounding...

Background Tris(2-carboxyethyl)phosphine (TCEP) is a commonly used laboratory reagent for the purposes of reducing disulfide bonds. TCEP is often preferred over alternative reducing reagents, such a...

The effectiveness of L-asparaginase and therefore the effectiveness of acute lymphoblastic leukemia treatment will be understood by determining the substrates of the enzyme, L-asparagine and L-glutam...

Antibiotics, their transformation products (TPs), and antibiotic resistance genes (ARGs) pose a major environmental threat, yet the influence of TPs o…

Four new dichapetalin hybrid triterpenoids, namely phyllanfranchins A–D (1–4), were obtained from the aerial part of Phyllanthus franchetianus H. L'ev…

Accurate postmortem interval (PMI) estimation remains a major challenge in forensic science due to the influence of biological, environmental, and cir…

Baby skincare products are extensively used on infant skin, yet their contamination with plastic additives (PAs) remains poorly understood. This study…

Abstract. Machine learning offers a promising path to annotating the large number of unidentified MS/MS spectra in metabolomics, addressing the limited cov

Limited proteolysis coupled to mass spectrometry (LiP-MS) probes protein conformational dynamics, but interpretation of LiP-MS data is complicated by heterogeneous proteolytic cleavage patterns and mi...

Sulfur mustard (HD) undergoes elimination reactions in environmental and decontamination scenarios, generating diagnostic unsaturated degradation products including 2-hydroxyethyl-vinyl sulfide (2-HVS...

Goat milk is highly nutritious and represents an ideal alternative for individuals allergic to cow’s milk proteins. This study investigated changes in milk composition and metabolic profiles of Xinong...

There have been various strategies to increase protein’s half-life in blood, such as glycosylation or protein fusion, but one of the most widely used approaches is the addition of PEG (polyethylene-glycol). Attaching a large, polydisperse PEG moiety to the therapeutics makes the analytical characterization challenging due to conjugation chemistry and increased heterogeneity. In this study, we aimed to develop a mass-spectrometry-based workflow to mitigate challenges. Using Orbitrap-based charge detection mass spectrometry, we determined the intact mass of a heavily glycosylated protein modality which is likely to carry a 30 kDa PEG. It has been demonstrated that the technique is suitable for impurity analysis, such as the remaining underivatized PEG in the formulated drug. Our data suggest mono-PEGylation of glycoprotein. Analyzing the digests of the protein generated by Lys-C and Glu-C and the combination of both enzymes in data-dependent acquisition allowed us to identify PEGylation sites on K45 and K52 residues and the N-terminus. Software-assisted data processing of PEGylation from digests yielded by the three digestion conditions generated results complementary to each other and led to a highly confident assignment of PEGylation sites. The methodology introduced here overcomes bottlenecks caused by PEGylation and can be routinely used for the comprehensive characterization of PEGylated therapeutics.

Polycyclic aromatic hydrocarbons (PAHs), phthalate esters (PAEs), and bisphenol A (BPA) are persistent environmental contaminants commonly encountered in aquatic environments. In this study, we rep...

Abstract. In recent years, studies investigating protein–protein interactions on a proteome-wide scale have increased exponentially. These developments wer

Walnut pellicle is rich in polyphenols that enhance antioxidant capacity and health benefits, including anti-inflammatory and neuroprotective effects.…

Untargeted metabolomics measurements were conducted via Gas Chromatography-Mass Spectrometry (GC-MS) on both sexes, male and female, of the alfalfa le…

Despite the ubiquitous impacts on ecosystem and human health, the formation mechanisms of nitrogen-containing organic compounds (NOCs) remain poorly u…

Quaternary ammonium compounds (QACs) have been used as antimicrobial additives in textiles, but information on their levels in textiles and ecological impacts from laundry wastewater is scarce. Here, 119 textile products from Chinese online vendors were analyzed for traditional and emerging QACs using target and suspect screening approaches with high-resolution mass spectrometry. The total concentrations of 18 traditional QACs ranged from 7.34 to 145,000 ng/g, and 16 emerging QACs were identified with total concentrations at 5.45 to 349,000 ng/g. Under laboratory-controlled conditions, over 76% of the selected textiles exhibited QAC migration rates exceeding 50% after washing. In simulated laundry experiments, hand-washing released a ΣQAC concentration of 42.1 ng/mL, and machine-washing released 22.4 ng/mL, with differences attributed to the water volume used by different methods. Both laundry wastewater and QACs solution at equivalent concentrations caused dose-dependent immobilization of Daphnia magna. Combining bioassay-based risk characterization factors with environmental dilution factors across 150 countries, 7% of regions showed high risk after WWTP-treatment, increasing to 41% for direct discharge with sewage. The high migration rates suggest that QAC-treated textiles not only fail to maintain long-term antimicrobial efficacy but also contribute to continuous low-level environmental exposures, raising concerns about their essential use in nondisposable textile materials.

Bromotyrosine-containing natural products have been isolated from marine sponges. While studying the uptake of engineered bacterial strains by sponges, we observed the production of fistularin-3 in the sponge. To explore these results, we employed multimodal imaging to colocalize metabolites with fluorescent in situ hybridization (FISH) probes. Using mass spectrometry imaging (MSI), we measured fistularin-3 and mapped this against the FISH probes to locate the bacteria. A recent study reported that P. brasiliensis produced fistularin-3 in pure culture, but these data have not yet been reproduced. We employed MSI and FISH to colocalize the fistularin-3 spatial distribution with P. brasiliensis in sponge tissue.