Aim: There is an ever-increasing demand for high-throughput LC-MS/MS bioanalytical assays to support drug discovery and development.
Results: Matrix effects of sofosbuvir (protonated) and paclitaxel (sodiated) were thoroughly evaluated using high-throughput chromatography (defined as having a run time ≤1 min) under 14 elution conditions with extracts from protein precipitation, liquid-liquid extraction and solid-phase extraction. A slight separation, in terms of retention time, between underlying matrix components and sofosbuvir/paclitaxel can greatly alleviate matrix effects.
Conclusion: High-throughput chromatography, with proper optimization, can provide rapid and effective chromatographic separation under 1 min to alleviate matrix effects and enhance assay ruggedness for regulated bioanalysis.
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http://dx.doi.org/10.4155/bio-2016-0005 | DOI Listing |
Mater Horiz
January 2025
School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China.
Recent advances in interfacial solar steam generation have made direct solar desalination a promising approach for providing cost-effective and environmentally friendly clean water solutions. However, developing highly effective, salt-resistant solar absorbers for long-term desalination at high efficiencies and evaporation rates remains a significant challenge. We present a Janus hydrogel-based absorber featuring a surface modified with thermo-responsive hydroxypropyl cellulose (HPC) and a hydrogel matrix containing photothermal conversion units, MXene, specifically designed for long-term seawater desalination.
View Article and Find Full Text PDFPhotosynth Res
January 2025
Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
The Orange Carotenoid Protein (OCP) is a unique water-soluble photoactive protein that plays a critical role in regulating the balance between light harvesting and photoprotective responses in cyanobacteria. The challenge in understanding OCP´s photoactivation mechanism stems from the heterogeneity of the initial configurations of its embedded ketocarotenoid, which in the dark-adapted state can form up to two hydrogen bonds to critical amino acids in the protein's C-terminal domain, and the extremely low quantum yield of primary photoproduct formation. While a series of experiments involving point mutations within these contacts helped us to identify these challenges, they did not resolve them.
View Article and Find Full Text PDFBiogerontology
January 2025
Centre for Global Health Research, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India.
Aging is associated with a marked increase in cardiovascular diseases, such as myocardial infarction (MI). Cellular senescence is also a crucial factor in the development of age-related MI. Matrix metalloproteinases (MMPs) interaction with cellular senescence is a critical determinant of MI development and outcomes, most notably in the aged heart.
View Article and Find Full Text PDFBull Environ Contam Toxicol
January 2025
Centro de Investigaciones en Bioquímica Clínica e Inmunología-CIBICI, Facultad de Ciencias Químicas, CONICET, Universidad Nacional de Córdoba, Haya de La Torre Esq., Medina Allende, 5000, Córdoba, Argentina.
The co-occurrence of pesticides in aquatic ecosystems highlights the need for studies investigating their potential toxicity as mixtures to the aquatic biota. Well-designed studies are essential to assess the presence and toxicity of relevant pesticide mixtures, particularly those such as the chloroacetamide herbicide metolachlor (MET), the triazole fungicide epoxiconazole (EP) and the diamide anthranilic insecticide chlorantraniliprole (CAP), which have not been previously tested, and whose co-occurrence is possible in waters close to cultivated areas. A solid phase extraction ultra-performance liquid chromatography-tandem quadrupole mass spectrometry method was developed to quantify equivalent toxicity concentrations for CAP, EP, and MET in artificial freshwater during acute toxicity tests.
View Article and Find Full Text PDFAnal Bioanal Chem
January 2025
Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, Australia.
The wide range of mass spectrometry imaging (MSI) technologies enables the spatial distributions of many analyte classes to be investigated. However, as each approach is best suited to certain analytes, combinations of different MSI techniques are increasingly being explored to obtain more chemical information from a sample. In many cases, performing a sequential analysis of the same tissue section is ideal to enable a direct correlation of multimodal data.
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