International Journal of Mass Spectrometry最新文献

{"title":"MALDI-TOF-MS unveils the distribution of oligosaccharides produced by hydrolysis of lichen polysaccharides through acidic and oxidative methods – a comparative study","authors":"Camille Guitteny ,&nbsp;Simon Ollivier ,&nbsp;Oznur Yeni ,&nbsp;Mathis Ralaivao ,&nbsp;Mathieu Fanuel ,&nbsp;Joël Boustie ,&nbsp;Isabelle Compagnon ,&nbsp;Vincent Ferrières ,&nbsp;Solenn Ferron ,&nbsp;Hélène Rogniaux ,&nbsp;David Ropartz ,&nbsp;Laurent Legentil ,&nbsp;Françoise Le Dévéhat","doi":"10.1016/j.ijms.2025.117473","DOIUrl":"10.1016/j.ijms.2025.117473","url":null,"abstract":"<div><div>MALDI-TOF MS methods coupled with offline chromatographic data were used to compare the distribution of oligosaccharides generated from acidic or oxidative degradation (Fitdog) of high molecular weight polysaccharides (&gt;10 kDa) obtained from two lichens <em>Lasallia pustulata</em> and <em>Cetraria islandica</em>. MALDI allowed to quickly compare the kinetics of degradation on both models (starting from non-purified polysaccharides) and to evaluate the dispersity of the resulting oligosaccharides. MALDI-MS confirmed on one hand that TFA hydrolysis gave neutral oligosaccharides easy to correlate with the chemical formula. On the other hand, more structural diversity was evidenced using the Fitdog protocol. Deep analysis of the MALDI data highlighted the formation of by-products corresponding to modified oligosaccharides (e.g., intracyclic cleavages).</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"515 ","pages":"Article 117473"},"PeriodicalIF":1.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural analysis of echinocandins via high-performance liquid chromatography-quadrupole/time-of-flight-tandem mass spectrometry","authors":"Hanzhi Zhang ,&nbsp;Xiakun Wang ,&nbsp;Bin Xu ,&nbsp;Zhenhua Tian ,&nbsp;Yu Luo ,&nbsp;Zhijun Tang ,&nbsp;Wen Liu","doi":"10.1016/j.ijms.2025.117475","DOIUrl":"10.1016/j.ijms.2025.117475","url":null,"abstract":"<div><div>Herein, the structures of echinocandins were analyzed by high-performance liquid chromatography-quadrupole/time-of-flight-tandem mass spectrometry (HPLC-Q/TOF-MS/MS). The echinocandin components were separated by using a Diamonsil Plus C18 column (5 μm, 4.6 mm × 250 mm), with 0.1 % formic acid in water as mobile phase A and 0.1 % formic acid in acetonitrile as mobile phase B under gradient elution. A systematic strategy for the structural characterization of echinocandin B, which is the main component of echicandins, is presented based on the accurate molecular mass and diagnostic ions obtained from both adduct ions [M+H]⁺ and [M+Na]⁺ as precursor ions. In the three fragmentation pathways obtained from the precursor ion of [M+H]⁺, echinocandins and its fragment ions produced continuous dehydrated ions ([M-<em>n</em>H₂O + H]⁺, <em>n</em> = 1, 2, 3, 4). The <em>N</em>-terminal fatty acyl (FA) connecting to the ornithine derivative transferred to the amino group of the proline derivative during fragmentation. Different characteristic ions, depending on the number of hydroxyls (0, 1, 2) on the ornithine derivative of different echinocandin analog. Moreover, the threonine residues underwent the neutral consecutive loss of acetaldehyde from the [M+Na]⁺ precursor ion. The [M+H]⁺ and [M+Na]⁺ echinocandin precursor ions respectively lost 1-(4-hydroxyphenyl)ethane-1,2-diol and 2-hydroxy-2-(4-hydroxyphenyl)acetaldehyde from the homotyrosine residues to generate different fragmentation ions. Thirteen echinocandin analogs were identified, including echinocandin C, echinocandin D, and echinocandin B variants with different FA and amino acid compositions.</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"515 ","pages":"Article 117475"},"PeriodicalIF":1.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144243010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural ion mobility spectrometry: What can we really measure?","authors":"Thanh D. Do","doi":"10.1016/j.ijms.2025.117482","DOIUrl":"10.1016/j.ijms.2025.117482","url":null,"abstract":"<div><div>Advancing our understanding of biomolecular systems requires technologies that can unravel their intricate dynamics and structures. Mass spectrometry (MS) has emerged as a versatile technique for characterizing complex systems, yet its findings are most impactful when paired with structural methods such as NMR, X-ray crystallography, and microscopy. This Perspective examines how ion mobility-mass spectrometry (IM-MS) serves as a key connector between dynamic molecular behavior and high-resolution structural insights. Examples from recent research in our laboratory illustrate how IM-MS enhances the study of flexible peptides, transient protein assemblies, and metabolite aggregation. These studies highlight the method's ability to reveal properties inaccessible to single techniques. By integrating multiple approaches, researchers gain a more comprehensive view of biomolecular complexity, demonstrating the power of combining analytical methods to tackle open questions in structural biology. This approach reflects the collaborative and iterative nature of science, where diverse perspectives converge to deepen our understanding of the molecular world.</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"515 ","pages":"Article 117482"},"PeriodicalIF":1.6,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a high efficiency cavity ion source and its characterization using a quadrupole mass analyser","authors":"VarunK. Yadav ,&nbsp;R.K. Bhatia ,&nbsp;A. Singh ,&nbsp;A.M. Kasbeker ,&nbsp;M.M. Gulhane ,&nbsp;E. Ravisankar ,&nbsp;T.K. Saha","doi":"10.1016/j.ijms.2025.117474","DOIUrl":"10.1016/j.ijms.2025.117474","url":null,"abstract":"<div><div>The present work deals with the design and development of an efficient cavity ion source (CIS). The design optimization of CIS was carried out on the basis of experimental studies using an indigenous quadrupole mass analyser (QMA). Subsequently, the optimally designed CIS was characterized for the quantitative and qualitative detection of various rare earth and actinide elements. Sensitivity measurement was carried out using total evaporation technique. Same set of studies were also conducted on a conventional thermal ion source (TIS) to compare the performance of the CIS with conventional TIS. The CIS showed an improvement in respective sensitivity by a factor of about 7 and 4 times for Uranium and Strontium as compared to conventional TIS. The improved sensitivity of CIS is attributed to the multiple interactions of the analyte species with the inner surface of the high temperature cavity tube thereby increasing its ionization probability.</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"515 ","pages":"Article 117474"},"PeriodicalIF":1.6,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An in situ analysis of the components of HTS vapor using a home-made high-temperature time-of-flight mass spectrometer","authors":"Zejie Fei,&nbsp;Min Ge,&nbsp;Yuan Qian,&nbsp;Hongtao Liu,&nbsp;Yuanyuan Tang","doi":"10.1016/j.ijms.2025.117471","DOIUrl":"10.1016/j.ijms.2025.117471","url":null,"abstract":"<div><div>The aim of this study was to propose the decomposition mechanism of heat transfer salt (HTS or Hitec salt) using a high-temperature furnace coupled with a time-of-flight mass spectrometer (TOF-MS). The decomposition process was systematically investigated in a vacuum environment at temperatures of 45 °C, 80 °C, 150 °C, 200 °C, 220 °C and 280 °C. The thermal decomposition of HTS initiated at and above 200 °C, which was slightly higher than its melting point of 142 °C. The main products resulting from the thermochemical reactions of nitrate/nitrite were NO and N₂ respectively, followed by N₂O. These findings revealed an unconventional reaction pathways for HTS decompositions as it contradicted the common assumption that O₂ or NO₂ would be present during this process. These new evidences further support the existence of intermediate species, such as superoxide and peroxide ions, in the molten salts during the initial thermal-chemical reaction process involving nitrite/nitrate salts.</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"514 ","pages":"Article 117471"},"PeriodicalIF":1.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chirality effects on the intrinsic acidity of isomeric tripeptides containing a D/L-Cysteine on the N-terminus: CAA and dCAA","authors":"Shiyuan Wang,&nbsp;Zachary Buen,&nbsp;Kimberlyann R. Harvey,&nbsp;Yuntao Zhang,&nbsp;Jianhua Ren","doi":"10.1016/j.ijms.2025.117472","DOIUrl":"10.1016/j.ijms.2025.117472","url":null,"abstract":"<div><div>Chirality effects on the intrinsic gas-phase acidity of oligopeptides have been studied using a pair of stereoisomeric tripeptides consisting of a D/L-cysteine (C) and two residues of alanine (A): CAA and ^dCAA, where the C-terminus is amidated. Mass spectrometry measurements through bracketing via collision-induced dissociation clearly show that CAA is a stronger gas-phase acid than ^dCAA. Quantitative values of the acidity were determined using the extended Cooks kinetic method. The resulting deprotonation enthalpy (<em>Δ</em>_acid<em>H</em>) for CAA is 326.2 kcal/mol (1364.7 kJ/mol) and for ^dCAA it is 326.8 kcal/mol (1367.6 kJ/mol). The corresponding gas-phase acidity (<em>Δ</em>_acid<em>G</em>) for CAA is 321.3 kcal/mol (1344.2 kJ/mol) and for ^dCAA it is 322.0 kcal/mol (1347.3 kJ/mol). Changing the N-terminal cysteine from the L-form to the D-form reduces the gas-phase acidity by about 0.6 kcal/mol (2.5 kJ/mol). Extensive conformational searches followed by quantum chemical calculations at the ωB97X-D/6-311+G(d,p) level of theory yielded a set of lowest energy conformations for each peptide species. Theoretical gas-phase acidities calculated using the Boltzmann averaged conformational contributions are in good agreement with the experimental data. The shift in the acidity is likely due to the conformational effect induced by D-cysteine, which increases the stability of the neutral ^dCAA, and hence reduces its acidity. A chirality change on a single amino acid can have a noticeable effect on the biochemical properties of peptides and proteins.</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"514 ","pages":"Article 117472"},"PeriodicalIF":1.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of glucagon oxidation on fibril formation","authors":"Aleksandra Antevska ,&nbsp;Gaoyuan Lu ,&nbsp;Emmanuel Nkyaagye ,&nbsp;Sarah S. Hirschbeck ,&nbsp;Connor C. Long ,&nbsp;Lingjun Li ,&nbsp;Thanh D. Do","doi":"10.1016/j.ijms.2025.117468","DOIUrl":"10.1016/j.ijms.2025.117468","url":null,"abstract":"<div><div>Glucagon structural dynamics is crucial for its function and pathology, yet its oligomerization and fibrillization mechanisms remain unclear. The early assembly of glucagon into fibrils is a critical process that can be perturbed by oxidation at key residues. In this study, we systematically tracked the oligomer formation of native glucagon up to the decamer level, revealing that glucagon undergoes oxidation at tryptophan and methionine—residues essential to its steric zipper structure. Our findings also indicate that oxidation exerts a dual effect on glucagon fibrillation. At low concentrations, oxidation partially unfolds glucagon's α-helix, facilitating hetero-oligomer formation between oxidized and native peptides, which promotes further oligomerization and unfolding. However, at high concentrations, oxidized glucagon fails to self-assemble into fibrils and appears more susceptible to degradation. Chromatographic analysis differentiates native and oxidized glucagon, highlighting increased polarity and multiple elution peaks indicative of diverse oxidative states, while mass spectrometry confirms site-specific modifications that influence structural transitions. These results emphasize the fine balance between oxidation and self-assembly, with implications for glucagon's therapeutic stability. An understanding of oxidation-induced aggregation dynamics is essential for developing stable glucagon formulations, underscoring the importance of controlling oxidative conditions to preserve their functionality and efficacy.</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"514 ","pages":"Article 117468"},"PeriodicalIF":1.6,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emissions of volatile organic compounds from COVID-19 response hospitals using mobile proton transfer reaction mass spectrometry observations in Wuhan in 2020","authors":"Qu Liang ,&nbsp;Xun Bao ,&nbsp;Chenghua Qin ,&nbsp;Qiangling Zhang ,&nbsp;Xue Zou ,&nbsp;Wei Xu ,&nbsp;Chaoqun Huang ,&nbsp;Chengyin Shen ,&nbsp;Yannan Chu","doi":"10.1016/j.ijms.2025.117460","DOIUrl":"10.1016/j.ijms.2025.117460","url":null,"abstract":"<div><div>To curb the rapid spread of the COVID-19, Wuhan was the first in the world to implement strict lockdown measures on January 23, 2020, and rapidly established several large hospitals. The extensive disinfection operations and daily activities within these hospitals led to the release of significant amounts of volatile organic compounds (VOCs). However, the composition and concentration characteristics of VOCs around these hospitals remain unclear. This study employed a self-developed mobile proton transfer reaction mass spectrometry (M-PTR-MS) system to conduct high spatiotemporal resolution mobile monitoring of VOCs in these hospitals in Wuhan from February 29 to March 15, 2020. The study compared the temporal and spatial variations in VOC across Wuhan, focusing on the frequency and concentration of VOC increases downwind of temporary hospital (Leishenshan Hospital), designated hospitals (Wuhan Xiehe Hospital, Wuhan Jinyintan Hospital), and shelter hospitals (Wuhan Keting Shelter Hospital, Hongshan Stadium Shelter Hospital). The results indicated that during the 14 days of effective mobile monitoring, the average concentration of total VOC (TVOC) in the first seven days was 13.39 % higher than in the latter seven days. Spatially, the average concentration of TVOC in the industrial areas north of the Yangtze River was 8.89 % higher than those in the non-industrial areas south of the river. Leishenshan Hospital exhibited the most diverse VOC composition and sources, with VOCs primarily originating from the fermentation and direct incineration of medical, waste within the hospital grounds and disinfectants. Downwind of the designated hospitals, VOCs related to industrial-source, disinfectants and waste were detected. Ethanol was detected downwind of all these hospitals. Waste generated by hospitals was a significant source of VOCs downwind of both temporary and designated hospitals. This study provides valuable technology for the research on VOC characteristics, disinfection efficacy evaluation, and environmental impact analysis during public health emergencies.</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"514 ","pages":"Article 117460"},"PeriodicalIF":1.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Miniature APCI ion source using AC corona discharge in a PFA tube: its application to the analysis of low-volatility compounds coupled with heat pulse desorption mass spectrometry (HPD/MS)","authors":"Stephanie Rankin-Turner ,&nbsp;Satoshi Ninomiya ,&nbsp;Haruo Shimada ,&nbsp;Kazumasa Kinoshita ,&nbsp;Kenzo Hiraoka","doi":"10.1016/j.ijms.2025.117461","DOIUrl":"10.1016/j.ijms.2025.117461","url":null,"abstract":"<div><div>DC corona discharge has long been used as the APCI ion source. In 2013, Habib et al. first proposed AC corona discharge as an APCI ion source and found that it is superior to DC as an ambient ion source [1]. In this study, an ion source using AC corona enclosed in a PFA (perfluoroalkoxy) tube (i.d.: 2 mm) was developed as a miniature APCI ion source coupled with heat pulse desorption mass spectrometry (HPD-MS) and used for the desorption of low-volatility compounds. Diverse materials were introduced, demonstrating the potential to apply the miniature ion source to gas-phase analytes, liquid samples, and solid materials in their native state. The modified technique was utilized in the analysis of a range of samples, including solid and liquid pharmaceuticals, food products, plant material, insects, and human biofluids, highlighting the wide applicability of the miniature APCI ion source across diverse sample types and fields of study.</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"514 ","pages":"Article 117461"},"PeriodicalIF":1.6,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determining β-monosaccharide head group composition with high-resolution cyclic ion mobility separations coupled to tandem mass spectrometry as a first step for unknown cerebroside analysis","authors":"Cameron N. Naylor,&nbsp;Gabe Nagy","doi":"10.1016/j.ijms.2025.117459","DOIUrl":"10.1016/j.ijms.2025.117459","url":null,"abstract":"<div><div>Cerebrosides, a class of biologically important lipids, are comprised of a monosaccharide head group along with their ceramide tail. However, their accurate characterization is challenging because of the isomerism in both the tail, from potential double bond positioning, or in the head from monosaccharide composition and α/β anomericity. In this work, we focused on tackling the identification of the β-monosaccharide head group, as either glucose or galactose, in various cerebroside isomers as well as demonstrating how our methodology could be applied to unknowns found in a porcine extract. To achieve this, we performed collision-induced dissociation prior to cyclic ion mobility separations to generate monosaccharide fragment ions from the starting cerebroside precursor ions. With this pre-cIMS CID approach, we observed that the cIMS separations of the fragment ions were diagnostic of the β-monosaccharide head group composition (i.e., glucose versus galactose), regardless of the ceramide tail length. From there, we demonstrated an example of how this methodology could also be applied to cerebrosides found in a porcine extract and a framework for how this approach could be added to existing workflows in developing collision cross section databases. Overall, we envision that our developed pre-cIMS CID-based approach will be a complementary and orthogonal tool to existing ones in glycolipidomics workflows.</div></div>","PeriodicalId":338,"journal":{"name":"International Journal of Mass Spectrometry","volume":"514 ","pages":"Article 117459"},"PeriodicalIF":1.6,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}