Background: Posttransplant lymphoproliferative disorders (PTLD) occur in 0.5% to 2.5% of cases in renal-transplant recipients. Epstein-Barr virus (EBV) is usually detected in the tumor cells, suggesting a role for this virus as an agent of B-cell proliferation. It is unusual for patients receiving allografts from the same donor to develop PTLD simultaneously.
Methods: we describe two patients who received renal allografts from the same donor and developed PTLD simultaneously. The presence of EBV in both tumors was confirmed. In this report, the origin of tumor cells was determined by immunohistochemical human leukocyte antigen (HLA) typing and microsatellite analysis. Clonality was studied by immunoglobulin gene rearrangement analysis.
Results: Our results suggest that the tumor originated from donor cells in both patients but, because immunoglobulin gene rearrangements were different, this could mean that lymphoid cells proliferate independently in each recipient.
Conclusions: We propose the following pathogenesis: immortalization of passenger B lymphocytes by EBV, proliferation of these cells, and development of PTLD by means of immunosuppression, antigenic stimulation, and HLA mismatch.
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http://dx.doi.org/10.1097/01.tp.0000146385.40108.2b | DOI Listing |
Malays J Pathol
December 2024
Universiti Kebangsaan Malaysia, Faculty of Medicine, Department of Pathology, 56000 Kuala Lumpur, Malaysia.
Introduction: ICAM-1 is an adhesion molecule expressed on the endothelial cells and is involved in regulating leukocyte recruitment to the site of inflammation. Elevated ICAM-1 mRNA expression was found in the serum of mothers with chorioamnionitis. This study aimed to determine the expression of ICAM-1 in the placenta and umbilical cord of pregnancy with chorioamnionitis, and its association with adverse neonatal outcome.
View Article and Find Full Text PDFJ Int Med Res
December 2024
Department of Medical Laboratory Sciences, Faculty of Allied Medical Sciences, Al-Ahliyya Amman University, Amman, Jordan.
Objective: Breastfeeding is associated with improved health outcomes in infancy and throughout adulthood as breast milk encompasses diverse immune-active factors that affect the ontogeny of the immune system in breastfed (BF) infants. Nevertheless, the impact of infant feeding on the immune system is poorly understood, and a comprehensive understanding of immune system development in human infants is lacking. In this observational study, we addressed the effects of different infant feeding approaches on cell populations and parameters in the peripheral blood of infants to gain insight into the innate and adaptive arms of the immune system.
View Article and Find Full Text PDFVestn Oftalmol
December 2024
AO Meditsina (Academician Roytberg's Clinic), Moscow, Russia.
Purpose: This study was conducted to identify the group at highest risk for autoimmune inflammation through a comparative analysis among patients with chronic post-traumatic uveitis (CPTU).
Material And Methods: The clinical group included 50 patients (aged 18 to 87 years, mean age 41±2.6 years) with CPTU resulting from penetrating injury, contusion, or intraocular surgery.
J Neuroinflammation
December 2024
Department of Neurology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan.
The immune system has garnered attention due to its association with disease progression in amyotrophic lateral sclerosis (ALS). However, the role of peripheral immune cells in this context remains controversial. Here, we conducted single-cell RNA-sequencing of peripheral blood mononuclear cells to comprehensively profile immune cells concerning the rate of disease progression in patients with ALS.
View Article and Find Full Text PDFJ Transl Med
December 2024
Department of Gastrointestinal Surgery, School of Medicine, RenJi Hospital, Shanghai Jiao Tong University, 160 Pujian Road, Pudong New Area, Shanghai, 200025, China.
Background: Recent studies have highlighted the distinct ratio of PD-1 + Treg/PD-1 + CD8 for prognosis prediction. However, it remains unclear about the association of this ratio and tertiary lymphoid structures (TLS) with prognosis and response to neoadjuvant or conversion therapy in advanced gastric cancer.
Methods: Firstly, fresh postoperative samples from 68 gastric cancer patients in Renji Hospital were collected.
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