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Immune cells determine the role of the tumor microenvironment during tumor progression, either suppressing tumor formation or promoting tumorigenesis. We analyzed the profile of immune cells in the tumor microenvironment of control mouse skins and skin tumors at the single-cell level. We identified 15 CD45 immune cell clusters, which broadly represent the most functionally characterized immune cell types including macrophages, Langerhans cells (LC), conventional type 1 dendritic cells (cDC1), conventional type 2 dendritic cells (cDC2), migratory/mature dendritic cells (mDC), dendritic epidermal T cells (DETC), dermal γδ T cells (γδT), T cells, regulatory T cells (Tregs), natural killer cells (NK), type 2 innate lymphoid cells (ILC2), neutrophils (Neu), mast cells (Mast), and two proliferating populations (Prolif.
View Article and Find Full Text PDFWhile pancreatic beta-cell proliferation has been extensively studied, the role of cell death during islet development remains incompletely understood. Using a genetic model of caspase inhibition in beta cells coupled with mathematical modeling, we here discover an onset of beta-cell death in juvenile zebrafish, which regulates beta-cell mass. Histologically, this beta-cell death is underestimated due to phagocytosis by resident macrophages.
View Article and Find Full Text PDFHistiocytosis are caused by pathogenic myeloid cells, and can be classified as Langerhans cell histiocytosis (LCH) and non-LCH. Erdheim-Chester disease (ECD) is a non-LCH, characterized by multi-organ involvement, typical imaging findings, and confirmatory histological studies. A case with multi-organ involvement and histological confirmation is presented.
View Article and Find Full Text PDFAdult-onset Langerhans cell histiocytosis with multisystem involvement: A rare case report.
Radiol Case Rep
March 2025
Radiology Department, Hamad Medical Corporation, Doha, Qatar.
Article Synopsis
- Langerhans cell histiocytosis (LCH) is a rare disorder marked by the abnormal buildup of dendritic histiocytes in tissues, often presenting as single- or multi-system diseases, particularly affecting adults.
- In a reported case, a 46-year-old woman experienced back pain, motor and sensory deficits, and was diagnosed with a compression fracture in the spine, alongside signs of central nervous system and salivary gland involvement.
- The patient underwent surgical intervention that included decompression and a biopsy, confirming the presence of LCH, highlighting the complexity and rarity of adult-onset LCH with extensive system involvement.
Erdheim-Chester disease: Comprehensive insights from genetic mutations to clinical manifestations and therapeutic advances.
Dis Mon
January 2025
Department of Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Raebareli Road, Lucknow-226025, (U.P.), India. Electronic address:
Erdheim-Chester disease (ECD) is an extremely rare non-Langerhans cell disorder that is believed to include both inflammatory and neoplastic characteristics. It is caused due to genetic mutations in proto-oncogenes like BRAF and MEK, while immunological pathways have an essential role in the onset and progression of the disease. Despite its rarity, ECD poses significant diagnostic and therapeutic challenges due to its heterogeneous clinical presentation and limited understanding of its underlying pathophysiology.
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