Quantification of All-Trans Retinoic Acid and Cytokine Levels After Fungal, Viral and Bacterial Infections in the Lung.

All-trans retinoic acid (atRA) plays a critical role in tissue homeostasis as a master regulator of cellular proliferation, apoptosis and differentiation as well as in immune cell differentiation and function. An active metabolite of vitamin A, atRA has been reported to be reduced in a number of inflammatory conditions in both the lung and gut. Decreases in atRA have been reported in gastrointestinal tissue in inflammatory bowel diseases, radiation-induced gastrointestinal injury and viral infection.

Quantitative LC-MS/MS Analysis of Endogenous Isomeric Metabolites Biliverdin IX Alpha, Beta, and Delta in Cell Culture Supernatant, Cell Pellet, and Lung Tissue.

() 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.

Diabetes care in the pandemic era in the Midwestern USA: a semi-structured interview study of the patient perspective.

Objectives: To understand patients' experiences with diabetes care during the COVID-19 pandemic, with an emphasis on rural, medically underserved, and/or minoritised racial and ethnic groups in the Midwestern USA.

Design: Community-engaged, semi-structured interviews were conducted by medical student researchers trained in qualitative interviewing. Transcripts were prepared and coded in the language in which the interview was conducted (English or Spanish).

heme metabolites biliverdin IXβ and IXδ are integral to lifestyle adaptations associated with chronic infection.

Unlabelled: is a versatile opportunistic pathogen requiring iron for its survival and virulence within the host. The ability to switch to heme as an iron source and away from siderophore uptake provides an advantage in chronic infection. We have recently shown the extracellular heme metabolites biliverdin IXβ (BVIXβ) and BVIXδ positively regulate the heme-dependent cell surface signaling cascade.