The microenvironment encompassing a variety of non-malignant cells in close proximity with malignant tumor cells has been well known to significantly affect the behavior of tumor cells. In this study, we therefore studied the mechanism of bone marrow stromal cells in protection of lymphoma cells from spontaneous apoptosis. We demonstrated that adhesion of the freshly isolated lymphoma B cells to bone marrow stromal cells or freshly isolated lymphoma stromal cells inhibited B cell spontaneous apoptosis in culture. This inhibition of apoptosis correlated with decreased cleavage of caspase-3/8 and increased activation of canonical and non-canonical NF-κB signaling pathway. In addition to BAFF signaling which has been reported as a functional determinant for B lymphoma cell survival in the bone marrow environment, we demonstrated RANKL from BMSCs works synergistically with BAFF to activate NF-κB signaling pathway and thus protects lymphoma B cells from spontaneous apoptosis.
Background: Mild encephalitis/encephalopathy with a reversible isolated splenial lesion (MERS) is a rare and complex clinico-radiological condition that aggregates various diseases. From a geographical point of view, most cases have been reported in Asia, especially in Japan. However, a very limited number of studies have properly evaluated Chinese patients diagnosed with MERS. Methods: Putative encephalitis/encephalopathy patients affected by a reversible isolated SCC lesion, as detected by magnetic resonance imaging (MRI), were retrospectively evaluated. Specifically, we reviewed extensive patient data, including prodromal and neurologic symptoms, neurologic examinations, MRI and electroencephalography (EEG) findings, laboratory results, treatments, and prognosis. Results: Six clinically mild encephalitis/encephalopathy patients, affected by a reversible isolated SCC lesion, were identified in a cohort of 22 patients. Six patients presented fever symptoms before the onset of neurological manifestations. Initial MRI data exhibited isolated SCC lesions with isointense or slightly hypointense on T1WI, hyperintense on T2WI, Flair, and DWI, as well as decreased ADC values, without contrast enhancement. EEG data indicated abnormalities (3/4), as well as elevated serum inflammatory markers (5/6) and hyponatremia (4/6). Cell content and protein yields were normal or slightly increased in the CSF of 6 patients, excluding one episode of significant increase in cell number. Patients were treated with corticosteroids, antivirals, and antibiotics, resulting in their full clinical recovery. SCC lesions mostly disappeared in all patients. Conclusion: In our study, the clinical features identified in all affected patients were mostly identical, which consisted of relatively mild CNS manifestations with a promising prognostic status.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.