Objective: To explore the location of telocytes in pulmonary tissues.
Methods: Electron microscopy, immunohistochemistry, primary cell culture and vital cell staining were used to identify the distribution of telocytes in mouse bronchial and pulmonary tissues.
Results: Telocytes were identified in the interstitial space between bronchial cartilage (cricoid) and smooth muscle by scanning and transmission electron microscope in mouse. By transmission electron micrscope and immunohistochemistry, telocytes were found in the interstitial spaces of lung parenchyma in connection with capillaries and bronchia. Telocytes expressed CD34, c-kit and vimetin by immunohistochemistry. After isolation, cultured telocytes demonstrated typical morphological feature, i.e. cells with telopode, which was seen as luminal structures with alternating thin and thick segments under electron microscope.
Conclusion: Telocytes are present in the interstitial space between cricoid cartilage and smooth muscle.
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http://dx.doi.org/10.3760/cma.j.issn.0529-5807.2012.03.006 | DOI Listing |
Burns Trauma
January 2025
Department of Burn, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Second Ruijin Road, Huangpu District, Shanghai, 200025, China.
Background: Lipopolysaccharide (LPS)-induced apoptosis of lung microvascular endothelial cells (ECs) is the main reason of lung edema and acute lung injury (ALI) in septic conditions. Telocytes (TCs) are a distinct type of interstitial cells found around the lung microvasculature, which may protect ECs through the release of shed vesicles. However, whether TCs protect against LPS-induced EC apoptosis and ALI has not been determined.
View Article and Find Full Text PDFUnlabelled: Group 2 innate lymphocytes (ILC2s) are prevalent in small intestine but engagement of type 2 immunity during basal processes are incompletely described. Thymic stromal lymphopoietin (TSLP), a cytokine implicated in ILC2 activation, was constitutively expressed in villus telocytes and crypt-associated trophocytes, specialized fibroblasts that sustain epithelial identity. Feeding increased TSLP and induced ILC2 type 2 cytokines that were attenuated by deletion of TSLP in PDGFRα stromal cells or TSLP receptor on ILC2s.
View Article and Find Full Text PDFCell Biol Int
November 2024
Stem Cell and Biotherapy Engineering Research Center of Henan, Henan Joint International Research Laboratory of Stem Cell Medicine, Xinxiang Medical University, Xinxiang, Henan, China.
Telocytes (TCs), a novel type of mesenchymal or interstitial cell with specific, very long and thin cellular prolongations, have been found in various mammalian organs and have potential biological functions. However, their existence during lung development is poorly understood. This study aimed to investigate the existence, morphological features, and role of CD34 SCs/TCs in mouse lungs from foetal to postnatal life using primary cell culture, double immunofluorescence, transmission electron microscopy (TEM) and scanning electron microscopy (SEM).
View Article and Find Full Text PDFInt J Mol Sci
June 2024
Laboratory of Histology and Embryology, Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Dental School-São Paulo State University (UNESP), Araraquara 14801-903, Brazil.
Although SARS-CoV-2 induces mucin hypersecretion in the respiratory tract, hyposalivation/xerostomia has been reported by COVID-19 patients. We evaluate the submandibular gland (SMGs) pathogenesis in SARS-CoV-2-infected K18-hACE2 mice, focusing on the impact of infection on the mucin production and structural integrity of acini, ductal system, myoepithelial cells (MECs) and telocytes. The spike protein, the nucleocapsid protein, hACE2, actin, EGF, TNF-α and IL-1β were detected by immunofluorescence, and the and expression was evaluated.
View Article and Find Full Text PDFSci Rep
June 2024
Institute of Reproductive Medicine, Medical School, Nantong University, Qixiu Road 19, Nantong, 226001, China.
Advancing healthcare for elderly men requires a deeper understanding of testicular aging processes. In this study, we conducted transcriptomic profiling of 43,323 testicular single cells from young and old mice, shedding light on 1032 telocytes-an underexplored testicular cell type in previous research. Our study unveiled 916 age-related differentially expressed genes (age-DEGs), with telocytes emerging as the cell type harboring the highest count of age-DEGs.
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