Fibroblastic reticulum cells (FBRCs) belong to a major subtype of stromal support cells in the lymphoid system and rarely give rise to tumors. We report a case of fibroblastic reticulum cell tumor arising in the spleen. The tumor was clinically and radiologically mistaken for a metastatic deposit in the spleen. Microscopically the tumor was composed of spindle cells arranged in fascicles and storiform pattern. The cells had oval to elongated vesicular nuclei and pale eosinophilic cytoplasm with indistinct cell borders. There were admixed inflammatory cells, including large numbers of plasma cells. The tumor cells were positive for smooth muscle actin, desmin, AE1/AE3, and MNF116. They were negative for S100, CD1a, CD21, CD23, CD34, CD31, and CD35 among other markers. The morphological features and immunoprofile of this rare tumor in comparison to the few cases reported in the literature are discussed along with the positive reaction with cytokeratins and their relationship to the smaller subset of FBRCs, the cytokeratin-positive interstitial reticulum cells in the spleen.
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http://dx.doi.org/10.1177/1066896913509009 | DOI Listing |
Cell Mol Life Sci
January 2025
Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale Et Fonctionnelle, 59000, Lille, France.
Glycans are known to be fundamental for many cellular and physiological functions. Congenital disorders of glycosylation (CDG) currently encompassing over 160 subtypes, are characterized by glycan synthesis and/or processing defects. Despite the increasing number of CDG patients, therapeutic options remain very limited as our knowledge on glycan synthesis is fragmented.
View Article and Find Full Text PDFExp Gerontol
January 2025
Department of Otorhinolaryngology, Qilu Hospital of Shandong University, Jinan, Shandong, China; NHC Key Laboratory of Otorhinolaryngology, Shandong University, Jinan, Shandong, China. Electronic address:
Background: Age-related hearing loss (ARHL) is a common sensory disorder with significant public health implications. However, few effective treatment options are available. Mendelian randomization (MR) has been used to repurpose existing drugs and identify new therapeutic targets.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», 188300 Gatchina, Russia.
Bruck syndrome is a rare autosomal recessive disorder characterized by increased bone fragility and joint contractures similar to those in arthrogryposis and is known to be associated with mutations in the () and () genes. These genes encode endoplasmic reticulum proteins that play an important role in the biosynthesis of type I collagen, which in turn affects the structure and strength of connective tissues and bones in the body. Mutations are associated with disturbances in both the primary collagen chain and its post-translational formation, but the mechanism by which mutations lead to Bruck syndrome phenotypes has not been determined, not only because of the small number of patients who come to the attention of researchers but also because of the lack of disease models.
View Article and Find Full Text PDFBiomedicines
December 2024
Department of Ophthalmology, School of Medicine, Sapporo Medical University, S1 W16 Chuo-ku, Sapporo City 060-8543, Hokkaido, Japan.
Background/objectives: The objective of the present study was to examine the unidentified effects that RHO-associated coiled-coil-containing protein kinase 1 and 2 antagonists exert on the transforming growth factor beta2-induced epithelial-mesenchymal transition of the human corneal stroma.
Methods: In the presence or absence of pan-RHO-associated coiled-coil-containing protein kinase inhibitors, ripasudil or Y27632 and RHO-associated coiled-coil-containing protein kinase 2 inhibitor, KD025, we analyzed the following: (1) planar proliferation caused by trans-endothelial electrical resistance and the cellular metabolic characteristics of the two-dimensional cultures of human corneal stroma fibroblasts; (2) the physical properties of a three-dimensional human corneal stroma fibroblasts spheroid; and (3) the gene expressions and their regulators in the extracellular matrix, along with the tissue inhibitors of metalloproteinases and matrix metalloproteinases and the endoplasmic reticulum stress-related factors of the two-dimensional and three-dimensional cultures in human corneal stroma fibroblasts.
Results: Exposure to 5 nM of the transforming growth factor beta2 markedly increased the trans-endothelial electrical resistance values as well as the metabolic function in two-dimensional cultures of human corneal stroma fibroblasts.
Int Cancer Conf J
January 2025
Department of Radiation Oncology, Kagawa University Hospital, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793 Japan.
Cytokeratin-positive interstitial reticulum cell (CIRC) tumor is an extremely rare malignant neoplasm and a subtype of fibroblastic reticular cell tumor, classified within the dendritic cell tumor group. We describe a case of an epicardial CIRC tumor that was resected and subsequently recurred in the left pulmonary hilum. This recurrence was treated with immunotherapy followed by radiotherapy.
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