Neither testis nor epididymis was found to be invaded by L1210 leukaemic cells in spite of widespread dissemination through other organs and tissues. The same applied to animals in relapse after protracted remissions induced by cyclophosphamide. Prior damage to the gonadal vascular endothelium by Cd++ did enable leukaemic cells to enter the testicular interstitium, but not the depleted seminiferous tubules. Injection of cells into the lymphatic sinus system of the testis led to rapid peritubular proliferation and systemic dissemination but the seminiferous tubules were not penetrated. The histological appearance resembled that of human ALL. The results suggest that the L1210 system, using the intratesticular route for inoculation can be used to examine the susceptibility to drugs of leukaemic cells in this environment. The potential of drugs to damage the vascular endothelium of the gonad and perhaps contribute to the development of testicular relapse could be assessed following intramuscular inoculation of cells.
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http://dx.doi.org/10.1038/bjc.1984.11 | DOI Listing |
Anal Chem
January 2025
Department of Bioengineering, University of Washington, SeattleWashington98195, United States.
Cell-to-cell heterogeneity in lipid signaling underlies variations in response and recurrence for many cancers, including leukemias. A highly parallel, miniaturized thin-layer chromatographic platform capable of assaying single cells was developed. Ultrasmall volumes (50 pL) of standard fluorescent lipids were separated with excellent repeatability, reproducibility, and limits of detection.
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January 2025
Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
The small GTPase R-RAS2 regulates homeostatic proliferation and survival of T and B lymphocytes and, when present in high amounts, drives the development of B cell chronic lymphocytic leukemia. In normal and leukemic lymphocytes, R-RAS2 constitutively binds to antigen receptors through their immunoreceptor tyrosine-based activation motifs (ITAMs) and promotes tonic activation of the phosphatidylinositol 3-kinase (PI3K) signaling pathway. Here, we examined the molecular mechanisms underlying this direct interaction and its consequences for R-RAS2 activity.
View Article and Find Full Text PDFFront Pediatr
January 2025
Department of Cell Immunotherapy, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Introduction: Corticosteroids are used for toxicity management, raising concerns about whether they may affect the anti-leukemic effects of chimeric antigen receptor (CAR)-T cells.
Methods And Results: In this study, we retrospectively analyzed patients (fined two subgroups based on disease burden. Of the 75 cases in the low disease burden (LDB) group (MRD < 5%, no extramedullary disease), there was no significant difference between the use of steroids and event-free survival (EFS) ( = 0.
Front Immunol
January 2025
Department of Hematology, Qilu Hospital of Shandong University, Jinan, China.
Background: Basic leucine zipper ATF-like transcription factor (BATF) is a nuclear basic leucine zipper protein affiliated with the AP-1/ATF superfamily. Previous research has confirmed that BATF expression plays a significant role in the tumour microenvironment. However, the associations between BATF expression and prognoses in acute myeloid leukaemia (AML) patients and their immunological effects remain unclear.
View Article and Find Full Text PDFAm J Hematol
January 2025
Department I of Internal Medicine and Medical Faculty, University of Cologne, Köln, Germany.
Disease Overview: Chronic lymphocytic leukemia (CLL) is the most frequent type of leukemia. It typically occurs in older patients and has a highly variable clinical course. Leukemic transformation is initiated by specific genomic alterations that interfere with the regulation of proliferation and apoptosis in clonal B-cells.
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