Antibiotic binding by leukocytes from patients with chronic brucellosis was studied in vitro. The pathogens were located intracellularly. The specimens were collected during the disease aggravation prior to the treatment and at the beginning of the remission after the routine therapy. It was found that during the disease aggravation at the intoxication peak and accumulation of a large number of Brucella in the cells binding of methacycline, rifampicin and gentamicin somewhat increased. After completion of the treatment course when the number of Brucella in the leukocytes markedly lowered, up to disappearance, the antibiotic binding decreased and reached the control figures. Penetration of erythromycin into the cells infected with Brucella lowered at the disease peak and remained at that level with an insignificant tendency to normalization at the beginning of the clinical remission after the treatment. The facts suggested that intracellular localization of the bacteria would change the quantitative characteristics of interaction of the cells, i.e. human leukocytes with antibacterial chemotherapeutic agents. The direction of the shifts must depend on the particular proportion of various types of mechanisms for penetration of drugs into the intracellular medium.

Download full-text PDF

Source

Publication Analysis

Top Keywords

binding leukocytes
8
antibiotic binding
8
disease aggravation
8
number brucella
8
[antibiotic binding
4
leukocytes
4
leukocytes brucellosis
4
brucellosis patients]
4
patients] antibiotic
4
leukocytes patients
4

Similar Publications

Background: Immune checkpoint inhibitors have revolutionized cancer therapy, but many patients fail to respond or develop resistance, often due to reduced T cell activity. Costimulation via 4-1BB has emerged as a promising approach to enhance the effector function of antigen-primed T cells. Bispecific T cell-engaging (TCE) antibodies are an effective way to provide tumor-specific T cell receptor-mediated signaling to tumor-infiltrating lymphocytes.

View Article and Find Full Text PDF

Lectins that can recognize and bind to carbohydrates and glycoconjugates are at the epicentre of research owing to their prospective applications. In the present study, a D-fucose binding lectin from the serum of darkling beetle, Zophobas morio was purified and their mitogenic potential over human B-cells was evaluated. Biochemical assays on the preliminary characterization revealed the occurrence of single D-fucose binding lectin.

View Article and Find Full Text PDF

Background: The objective was to characterize the colostrum proteome of primiparous Holstein cows in association with immunoglobulin G (IgG) content. Immediately after calving, colostrum samples were collected from 18 cows to measure IgG concentration. Based on colostrum IgG content, samples were classified through cluster analysis and were identified as poor, average, and excellent quality.

View Article and Find Full Text PDF

Enhanced effect of the immunosuppressive soluble HLA-G2 homodimer by site-specific PEGylation.

Sci Rep

January 2025

Laboratory of Biomolecular Science, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, 060-0812, Japan.

Human leukocyte antigen (HLA)-G is a nonclassical HLA class I molecule that has an immunosuppressive effect mediated by binding to immune inhibitory leukocyte immunoglobulin-like receptors (LILR) B1 and LILRB2. A conventional HLA-G isoform, HLA-G1, forms a heterotrimeric complex composed of a heavy chain (α1-α3 domains), β2-microglobulin (β2m) and a cognate peptide. One of the other isoforms, HLA-G2, lacks a α2 domain or β2m to form a nondisulfide-linked homodimer, and its ectodomain specifically binds to LILRB2 expressed in human monocytes, macrophages, and dendritic cells.

View Article and Find Full Text PDF

Dynamic communication between hepatocytes and the environment is critical in hepatocellular carcinoma (HCC) development. Clinical immunotherapy against HCC is currently unsatisfactory and needs more systemic considerations, including the identification of new biomarkers and immune checkpoints. Transmembrane 4 L six family member 5 (TM4SF5) is known to promote HCC, but it remains unclear how cancerous hepatocytes avoid immune surveillance and whether avoidance can be blocked.

View Article and Find Full Text PDF

Want 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!