Liquid chromatography coupled with high-resolution mass spectrometry data-independent acquisition (LC-HRMS/DIA), including MSE, enable comprehensive metabolomics analyses though they pose challenges for data processing with automatic annotation and molecular networking (MN) implementation. This motivated the present proposal, in which we introduce DIA-IntOpenStream, a new integrated workflow combining open-source software to streamline MSE data handling. It provides ‘in-house’ custom database construction, allows the conversion of raw MSE data to a universal format (.mzML) and leverages open software (MZmine 3 and MS-DIAL) all advantages for confident annotation and effective MN data interpretation. This pipeline significantly enhances the accessibility, reliability and reproducibility of complex MSE/DIA studies, overcoming previous limitations of proprietary software and non-universal MS data formats that restricted integrative analysis. We demonstrate the utility of DIA-IntOpenStream with two independent datasets: dataset 1 consists of new data from 60 plant extracts from the Ocotea genus; dataset 2 is a publicly available actinobacterial extract spiked with authentic standard for detailed comparative analysis with existing methods. This user-friendly pipeline enables broader adoption of cutting-edge MS tools and provides value to the scientific community. Overall, it holds promise for speeding up metabolite discoveries toward a more collaborative and open environment for research.
6 January 2024 in Colloids and Surfaces B: Biointerfaces
Background: Angiostrongylus cantonensis is a neurotropic nematode recognized as the leading cause of eosinophilic meningitis worldwide. Despite its growing medical importance, therapeutic options for angiostrongyliasis remain limited, highlighting the need for new anthelmintic agents. Methods: The anthelmintic activity of andrographolide, a diterpene lactone isolated from Cymbopogon schoenanthus, was evaluated against first-stage (L1) larvae, infective third-stage (L3) larvae, and adult worms of A. cantonensis using motility-based phenotypic assays. Toxicity was assessed in mammalian cell models and Caenorhabditis elegans, and drug-likeness and ADMET properties were evaluated using in silico approaches. Results: Andrographolide exhibited concentration-dependent activity across all developmental stages, with EC50 values of 12.5, 11.2, and 7.3 µM for L1, L3, and adult worms, respectively. These EC50 values were similar to those of albendazole, with no statistically significant differences detected for any developmental stage. No toxicity was detected at the highest concentrations tested in mammalian cell models (CC50 > 500 µM) or C. elegans (LD50 > 1000 µM), supporting a preliminary selectivity profile. The in silico analyses predicted compliance with major drug-likeness rules, absence of PAINS alerts, high gastrointestinal absorption, and low probabilities of hepatotoxicity, nephrotoxicity, and neurotoxicity. Conclusions: Andrographolide represents a promising in vitro anthelmintic hit against A. cantonensis and warrants further preclinical investigation.