Background and Objectives: Coronary artery disease (CAD) is the foremost cause of adult disability and mortality. There is an urgent need to focus on the research of new approaches for the prevention and treatment of CAD. Materials and Methods: The effects of peptides isolated from the blood plasma of CAD patients on endothelial cell secretion using the in vitro model have been tested. Human endothelial progenitor cells (HEPCs) were incubated for 24 h with peptides isolated from the plasma of healthy subjects or patients with stable angina, progressive unstable angina, and myocardial infarction. The contents of some soluble anticoagulant as well as procoagulant mediators in HEPC culture treated with peptide pools were then compared. Results and Conclusion: The results show that peptides from the plasma of patients with myocardial infarction promote endothelial cells to release both von Willebrand factor and endothelin-1, increasing vasoconstriction and shifting hemostatic balance toward a prothrombotic state. In contrast, peptides from the plasma of patients with progressive unstable angina suppress the secretion of endothelin-1 by HEPCs, while the secretion of both von Willebrand factor and tissue plasminogen activator was increased. As can be seen from the results obtained, disease derived peptides may contribute to the homeostasis of living organisms or the progression of pathological processes.

Background and Objectives: The coronavirus (SARS-CoV-2) damages all systems and organs. Yet, to a greater extent, the lungs are particularly involved, due to the formation of diffuse exudative inflammation in the form of acute respiratory distress syndrome (ARDS) with next progression to pulmonary fibrosis. SARS-associated lung damage is accompanied by the pronounced activation of mononuclear cells, damage of the alveoli and microvessels, and the development of organized pneumonia. To study the expression of macrophage markers (CD68 and CD163), angiotensin-converting enzyme-2 (ACE2), and caspase-3 on the results of two fatal clinical observations of COVID-19. Materials and Methods: In both clinical cases, the female patients died from complications of confirmed COVID-19. Conventional morphological and immunohistochemical methods were used. Results: There was an acute exudative hemorrhagic pneumonia with the formation of hyaline membranes, focal organization of fibrin, stromal sclerosis, stasis, and thrombus formation in the lung vessels. Signs such as the formation of hyaline membranes, organization, and fibrosis were more pronounced in severe disease activity. The activation of CD68+/CD163+ macrophages could cause cell damage at an early stage of pneumonia development, and subsequently cause fibrotic changes in lung tissue. ACE2 expression in lung tissue was not detected in severe pneumonia, while in moderate pneumonia, weak expression was noted in individual cells of the alveolar epithelium and vascular endothelium. Conclusions: This finding could show the dependence of ACE2 expression on the severity of the inflammatory process in the lungs. The expression of caspase-3 was more pronounced in severe pneumonia.

Marko Kozyk, Lohith Kumar, Kateryna Strubchevska, Manan Trivedi, Margaret Wasvary, Suprabhat Giri. Gut and Liver 2024;18:434-43. https://doi.org/10.5009/gnl230094

We present a case of a 60‐year‐old female with a history of liver cirrhosis, alcohol abuse, and chronic venous insufficiency who presented with maggot‐infested wounds on her legs, bilateral buttocks, and groin area. Two sets of blood cultures grew Wohlfahrtiimonas chitiniclastica. She underwent wound debridement and treatment with cefazolin.

The relationship between vitamin D deficiency and the metabolic syndrome has recently been revealed. Vitamin D deficiency was hypothesized to cause increased insulin resistance and decreased insulin secretion, which can result in the development of diabetes mellitus and obesity. Cardiovascular diseases are also closely related to the metabolic syndrome. Vitamin D has been shown to have complex multistep metabolism and act as a hormone at many extraskeletal targets. In this literature review, a comprehensive analysis of publications from Scopus, Web of Science, MedLine, The Cochrane Library, EMBASE, Global Health databases, as well as scientific libraries of Ukraine, European Union, Great Britain, USA and other countries was performed. Our goal is to identify and analyze scientific publications discussing various biological effects of vitamin D and its use in the comprehensive treatment of various diseases. In addition to the previously known role of vitamin D in calcium metabolism and the musculoskeletal system functionality, a wide range of its pleiotropic effects has been discovered recently. Modern studies have shown a relationship between low levels of vitamin D and development of neurocognitive dysfunction, mental and neurological disorders, infertility, immune reactivity and autoimmune disorders, various types of cancer, and cardiovascular pathologies. More recent data also revealed a relationship of vitaminD deficiency with practically all aspects of metabolic syndrome, namely diabetes mellitus type 2 and type 1, hyperglycemia, dyslipidemia, obesity, hypertension, and insulin resistance. It was concluded that the data of the modern literature regarding the effectiveness of vitamin D in the treatment and prevention of metabolic disorders and structural and functional changes of the liver in diabetes and non-alcoholic fatty liver disease are quite contradictory: at the same level as the numerous publications on the effective use of vitamin D, there are studies with unconfirmed effectiveness of therapy and even its toxicity for the indicated pathologies.

Vibrio vulnificus is a Gram-negative bacterium, a member of the Vibrionaceae family. V. vulnificus is the main cause of seafood-related deaths in the United States because it can cause severe wound infections or sepsis. This microorganism is highly dependent on iron availability. Therefore, patients with high body iron levels are more susceptible to the infection. Prompt treatment with cephalosporins as well as doxycycline is usually administered. We present a case of V. vulnificus bacteremia in a patient heterozygous for HFE p.C282Y mutation and underlying alcoholic liver cirrhosis.