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A Novel Liquid Chromatography-Tandem Mass Spectrometry Method to Quantify Tryptophan and Its Major Metabolites in Serum to Support Biomarker Studies in Patients with Cancer Undergoing Immunotherapy.
Molecules
December 2024
Department of Physical Pharmacy and Pharmacokinetics, Poznan University of Medical Sciences, 3 Rokietnicka Street, 60-806 Poznań, Poland.
Tryptophan (TRP) is an essential amino acid crucial for the production of many bioactive compounds. Disturbances in TRP metabolism have been revealed in various diseases, many of which are closely related to the immune system. In recent years, we have focused on finding blood-based biomarkers of successful immunotherapy in cancer.
View Article and Find Full Text PDFQuantitative LC-MS/MS Analysis of Endogenous Isomeric Metabolites Biliverdin IX Alpha, Beta, and Delta in Cell Culture Supernatant, Cell Pellet, and Lung Tissue.
J Proteome Res
January 2025
School of Pharmacy, Department of Pharmaceutical Sciences, University of Maryland, Baltimore, Maryland 21201, United States.
() utilizes heme as an iron source from the host during infection. Biliverdin beta and delta (BVIXβ and BVIXδ) are generated by HemO, specific to , while biliverdin alpha is generated from the bacterial BphO system and by mammalian heme oxygenases. Here, we have developed and characterized a quantitative LC-MS/MS assay for the separation of three endogenous isomers, BVIXα, BVIXβ, and BVIXδ.
View Article and Find Full Text PDFTSLP acts on regulatory T cells to maintain their identity and limit allergic inflammation.
Sci Immunol
January 2025
Laboratory of Molecular Immunology and Immunology Center, National Heart, Lung, and Blood Institute, National Institutes of Health (NIH), Bethesda, MD 20892, USA.
Thymic stromal lymphopoietin (TSLP) is a type I cytokine that promotes allergic responses and mediates type 2 immunity. A balance between effector T cells (T), which drive the immune response, and regulatory T cells (T), which suppress the response, is required for proper immune homeostasis. Here, we report that TSLP differentially acts on T versus T to balance type 2 immunity.
View Article and Find Full Text PDFTransformation of lung adenocarcinoma to small cell lung cancer following osimertinib treatment: a case report and literature review.
Anticancer Drugs
January 2025
Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Epidermal growth factor receptor (EGFR)-tyrosine kinase inhibitors (TKIs) effectively treat EGFR-mutant lung adenocarcinoma, demonstrating initial efficacy but eventually leading to acquired resistance. Small cell transformation is a rare resistance mechanism to EGFR-TKIs in lung adenocarcinoma, which can complicate clinical diagnosis and treatment. We present a patient with lung adenocarcinoma who underwent a prior pneumonectomy and adjuvant chemotherapy and was treated with osimertinib after the recurrence of lung cancer.
View Article and Find Full Text PDFComparative Effectiveness of Outpatient COVID-19 Therapies in Solid Organ Transplant Recipients.
Transpl Infect Dis
January 2025
Division of Public Health, Infectious Diseases, and Occupational Medicine, Mayo Clinic, Rochester, Minnesota, USA.
Background: Multiple outpatient therapies have been developed for COVID-19 in high-risk individuals, but solid organ transplant (SOT) recipients were not well represented in controlled clinical trials. To date, few comparative studies have evaluated outcomes between outpatient therapies in this population.
Methods: We performed a retrospective cohort study using de-identified administrative claims data from OptumLabs Data Warehouse.
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