The objective of this study was to investigate the effects of heat shock (HS) treatment and geldanamycin (GA) on the release of arachidonic acid (AA) from human peripheral blood mononuclear cells (PBMC), monocytes and lymphocytes. Mononuclear cells prepared from blood of healthy subjects were preincubated with (3)H-AA. The release of (3)H-AA incorporated into the membrane was studied after pretreatment of cells by HS (43 degrees C, 1 h) and GA. The activation of AA producing enzymes was achieved by the addition of phorbol 12-myristate 13-acetate (PMA) or by the combination of PMA+calcium ionophore A-23187. Treatment of cells by HS inhibited the release of AA. Furthermore, the release of AA by PBMC was dose dependently inhibited by GA. The combination of treatments by HS and GA augmented the inhibition of AA release. The HS response involves a diminished release of AA from PBMC. The inhibitory effect of GA on the AA release is a new element in the antiinflammatory pharmacological ability of this drug.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0165-2478(02)00103-7 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Analysis of differential gene expression of PBMC for the in vitro detection of drug sensitization.
Allergol Int
January 2025
Research Division, Federal Institute for Drugs and Medical Devices (BfArM), Bonn, Germany; Department of Dermatology and Allergy, University Hospital Aachen, Aachen, Germany.
Background: The detection of drug-specific activation of T cells in the lymphocyte transformation test (LTT) is mainly based on cell proliferation or cytokine secretion. However, the LTT presents with a varying sensitivity and specificity. The aim of our study was to analyse the genome wide gene expression of PBMC to identify drug allergy-specific gene regulation patterns.
View Article and Find Full Text PDFHyperleukocytosis in a neuroblastoma patient after treatment with natural killer T cells expressing a GD2-specific chimeric antigen receptor and IL-15.
J Immunother Cancer
January 2025
Center for Advanced Innate Cell Therapy, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
The ability of immune cells to expand numerically after infusion distinguishes adoptive immunotherapies from traditional drugs, providing unique therapeutic advantages as well as the potential for unmanageable toxicities. Here, we describe a case of lethal hyperleukocytosis in a patient with neuroblastoma treated on phase 1 clinical trial (NCT03294954) with autologous natural killer T cells (NKTs) expressing a GD2-specific chimeric antigen receptor and cytokine interleukin 15 (GD2-CAR.15).
View Article and Find Full Text PDFMonocytic reactive oxygen species-induced T cell apoptosis impairs cellular immune response to SARS-CoV-2 mRNA vaccine.
J Allergy Clin Immunol
January 2025
Institute of Human Genetics, UMR9002, CNRS and Montpellier University; Montpellier, France; Montpellier University; Montpellier, France; Immunology Department, University Hospital; Nîmes, France. Electronic address:
Background: We have recently shown that, during acute severe COVID-19, SARS-CoV-2 spike protein (S) induces a cascade of events resulting in T cell apoptosis. Indeed, by neutralizing the protease activity of its receptor, ACE2, S induces an increase in circulating Angiotensin II (AngII), resulting in monocytic release of reactive oxygen species (ROS) and programmed T cell death.
Objective: Here, we tested whether SARS-CoV-2 mRNA vaccines, known to cause the circulation of the vaccine antigen, S-protein receptor binding domain (RBD), might trigger the same cascade.
Anti-inflammatory, immunostimulant and antimicrobial properties of tannic acid in the diet of Oreochromis niloticus infected with Aeromonas hydrophila.
Fish Shellfish Immunol
January 2025
Aquatic Organisms Health Laboratory (AQUOS), Aquaculture Department, UFSC, Rodovia Admar Gonzaga 1346, 88037-000 Florianópolis, SC, Brazil. Electronic address:
The study aimed to assess the impact of dietary supplementation with tannic acid on the growth, health, and survival of Oreochromis niloticus following exposure to Aeromonas hydrophila. A total of 320 fish were divided into 16 tanks and assigned to four treatment groups: feed with 0.2% tannic acid (TA), 0.
View Article and Find Full Text PDFBackground: The mechanism underlying chronic drug-induced liver injury (DILI) remains unclear. Immune activation is a common feature of DILI progression and is closely associated with metabolism. We explored the immunometabolic profile of chronic DILI and the potential mechanism of chronic DILI progression.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!