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Telocytes

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https://www.readbyqxmd.com/read/29747396/beta-estradiol-regulates-voltage-gated-calcium-channels-and-estrogen-receptors-in-telocytes-from-human-myometrium
#1
Adela Banciu, Daniel Dumitru Banciu, Cosmin Catalin Mustaciosu, Mihai Radu, Dragos Cretoiu, Junjie Xiao, Sanda Maria Cretoiu, Nicolae Suciu, Beatrice Mihaela Radu
Voltage-gated calcium channels and estrogen receptors are essential players in uterine physiology, and their association with different calcium signaling pathways contributes to healthy and pathological conditions of the uterine myometrium. Among the properties of the various cell subtypes present in human uterine myometrium, there is increasing evidence that calcium oscillations in telocytes (TCs) contribute to contractile activity and pregnancy. Our study aimed to evaluate the effects of beta-estradiol on voltage-gated calcium channels and estrogen receptors in TCs from human uterine myometrium and to understand their role in pregnancy...
May 9, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29724455/telocytes-in-human-fetal-skeletal-muscle-interstitium-during-early-myogenesis
#2
Mirca Marini, Mirko Manetti, Irene Rosa, Lidia Ibba-Manneschi, Eleonora Sgambati
A new peculiar stromal cell type called telocyte (TC)/CD34-positive stromal cell (i.e. cell with distinctive prolongations named telopodes) has recently been described in various tissues and organs, including the adult skeletal muscle interstitium of mammals. By forming a resident stromal three-dimensional network, TCs have been suggested to participate in different physiological processes within the skeletal muscle tissue, including homeostasis maintenance, intercellular signaling, tissue regeneration/repair and angiogenesis...
April 30, 2018: Acta Histochemica
https://www.readbyqxmd.com/read/29723851/transplantation-of-telocytes-attenuates-unilateral-ureter-obstruction-induced-renal-fibrosis-in-rats
#3
Long Zheng, Long Li, Guisheng Qi, Mushuang Hu, Chao Hu, Shuo Wang, Jiawei Li, Mingnan Zhang, Weitao Zhang, Yigang Zeng, Yi Zhang, Liping Li, Xuanchuan Wang, Miao Lin, Tongyu Zhu, Ruiming Rong
BACKGROUND/AIMS: Previous studies imply that telocytes may have a protective effect on fibrosis in various organs, including the liver, colon, and heart. The effect of telocytes on renal fibrosis remains unknown. Herein, this study was designed to investigate the effect of telocytes on renal fibrosis and the potential mechanisms involved. METHODS: In a unilateral ureteral obstruction (UUO)-induced renal fibrosis model, telocytes were injected via the tail vein every other day for 10 days...
April 28, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29720649/subepithelial-telocytes-are-an-important-source-of-wnts-that-supports-intestinal-crypts
#4
Michal Shoshkes-Carmel, Yue J Wang, Kirk J Wangensteen, Beáta Tóth, Ayano Kondo, Efi E Massassa, Shalev Itzkovitz, Klaus H Kaestner
Tissues that undergo rapid cellular turnover, such as the mammalian haematopoietic system or the intestinal epithelium, are dependent on stem and progenitor cells that proliferate to provide differentiated cells to maintain organismal health. Stem and progenitor cells, in turn, are thought to rely on signals and growth factors provided by local niche cells to support their function and self-renewal. Several cell types have been hypothesized to provide the signals required for the proliferation and differentiation of the intestinal stem cells in intestinal crypts1-6 ...
May 2, 2018: Nature
https://www.readbyqxmd.com/read/29700981/telocytes-and-interstitial-cells-of-cajal-in-the-biliary-system
#5
REVIEW
Lei Chen, Baoping Yu
A novel type of interstitial tissue cells in the biliary tree termed telocytes (TCs), formerly known as interstitial Cajal-like cells (ICLCs), exhibits very particular features which unequivocally distinguish these cells from interstitial cells of Cajal (ICCs) and other interstitial cell types. Current research substantiates the existence of TCs and ICCs in the biliary system (gallbladder, extrahepatic bile duct, cystic duct, common bile duct and sphincter of Oddi). Here, we review the distribution, morphology and ultrastructure of TCs and ICCs in the biliary tree, with emphasis on their presumptive roles in physiological and pathophysiological processes...
April 26, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29694850/the-telopode-and-filopode-projecting-heterogeneous-stromal-cells-of-the-human-sclera-niche
#6
C E Petrea, Ş Crăiţoiu, A D Vrapciu, V S Mănoiu, M C Rusu
Telocytes (TCs) are stromal cells defined by the presence of long and slender prolongations (telopodes). They are a biologically and functionally heterogeneous population that has not been previously investigated in the sclera. The purpose of this study is to investigate the presence and characteristics of scleral telocytes through a combined immunohistochemical and transmission electron microscopy (TEM) study using samples from ten adult patients. Stromal cells with a TC-like morphology expressed CD34, CD45, CD105, vimentin and occasionally CD68 but were negative for collagen III, CD31, CD133, and CD146...
April 22, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29693711/telocytes-in-skeletal-cardiac-and-smooth-muscle-interstitium-morphological-and-functional-aspects
#7
REVIEW
Mirca Marini, Irene Rosa, Lidia Ibba-Manneschi, Mirko Manetti
Telocytes (TCs) represent a new distinct type of cells found in the stromal compartment of many organs, including the skeletal, cardiac and smooth muscles. TCs are morphologically defined as interstitial cells with a small cellular body from which arise very long (up to hundreds of micrometers) and thin moniliform processes (named telopodes) featuring the alternation of slender segments (called podomers) and small dilated portions (called podoms) accommodating some organelles. Although these stromal cells are mainly characterized by their ultrastructural traits, in the last few years TCs have been increasingly studied for their immunophenotypes, microRNA profiles, and gene expression and proteomic signatures...
April 25, 2018: Histology and Histopathology
https://www.readbyqxmd.com/read/29680777/stromal-cells-telocytes-and-endothelial-progenitors-in-the-perivascular-niches-of-the-trigeminal-ganglion
#8
M C Rusu, V S Mănoiu, D Creţoiu, S M Creţoiu, A D Vrapciu
Stromal cells/telocytes (SCs/TCs) were recently described in the human adult trigeminal ganglion (TG). As some markers are equally expressed in SCs/TCs and endothelial cells, we hypothesized that a subset of the TG SCs/TCs is in fact represented by endothelial progenitor cells of a myelomonocytic origin. This study aimed to evaluate whether the interstitial cells of the human adult TG correlate with the myelomonocytic lineage. We used primary antibodies for c-erbB2/HER-2, CD31, nestin, CD10, CD117/c-kit, von Willebrand factor (vWF), CD34, Stro-1, CD146, α-smooth muscle actin (α-SMA), CD68, VEGFR-2 and cytokeratin 7 (CK7)...
April 19, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29678517/what-podoplanin-tells-us-about-cells-with-telopodes
#9
L Manta, M C Rusu, F Pop
Telocytes (TCs) are stromal cells with telopodes, which represent long, thin, moniliform cell processes; however, this morphological feature alone is insufficient to define a cell type. Specific markers of lymphatic endothelial cells (LECs), such as Prox-1, podoplanin (D2-40) or LYVE-1, are not usually tested in TCs. We thus aimed at performing a study in light microscopy to evaluate whether or not LECs could be mistaken for TCs. Therefore we used CD34, α-smooth muscle actin and D2-40 for an immunohistochemical study on archived paraffin-embedded samples of uterine leiomyoma...
April 17, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29660398/molecular-phenotypes-of-the-human-kidney-myoid-stromal-cells-telocytes-and-myoepithelial-cells
#10
M C Rusu, L Mogoantă, F Pop, M A Dobra
The connective stromal and epithelial compartments of the kidney have regenerative potential and phenotypic flexibility. A few studies have shown that cells appertaining to both compartments can exhibit myoid phenotypes. The purpose of our study was to investigate the myoid pattern of kidney and its association with the kidney niches containing stromal cells/telocytes (SC/TCs). We performed an immunohistochemical study using a panel of endothelial, myoid, mesenchymal and stem/progenitor markers, namely CD31, CD34, CD105 (endoglin), CD117/c-kit, nestin, desmin, α-smooth muscle actin (α-SMA) and the heavy chain of smooth muscle myosin (SMM)...
April 13, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29655846/telocyte-like-cells-containing-weibel-palade-bodies-in-rat-lamina-fusca
#11
C E Petrea, M C Rusu, V S Mănoiu, A D Vrapciu
Telocytes (TCs) are cells with long, thin and moniliform processes called telopodes. These cells have been found in numerous tissues, including the eye choroid and sclera. Lamina fusca (LF), an anatomical structure located at the sclera-choroid junction, has outer fibroblastic lamellae containing cells with long telopodes. The purpose of this study was to evaluate, via transmission electron microscopy, the LF for the presence of endothelial-specific ultrastructural features, such as Weibel-Palade bodies (WPBs), in the residing TCs...
April 12, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29655845/cardiac-telocytes-from-basic-science-to-cardiac-diseases-i-atrial-fibrillation
#12
REVIEW
Sorin Hostiuc, Ionuț Negoi, Catalin Dogaroiu, Eduard Drima, Cristian Bogdan Iancu
INTRODUCTION: Atrial fibrillation (AF) is nowadays considered to be one of the most important causes of heart failure, stroke, cognitive decline, vascular dementia, sudden death and overall cardiovascular morbidity. Recently were published a few articles suggesting a possible involvement of telocytes in the development of atrial fibrillation. The purpose of this article is to analyze the results obtained in the field systematically, and to see if there is enough data to support a possible involvement of telocytes in arrhythmogenesis...
April 12, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29615057/an-in-vitro-investigation-of-telocytes-educated-macrophages-morphology-heterocellular-junctions-apoptosis-and-invasion-analysis
#13
Xiao-Juan Jiang, Dragos Cretoiu, Zong-Ji Shen, Xiao-Jun Yang
BACKGROUND: Telocytes (TCs), a recently discovered novel type of interstitial cells, were also found in a wide variety of human and mammalian reproductive organs/tissues, including uterus, oviduct and placenta. Previously, we demonstrated that TCs-conditioned media was capable of activating peritoneal macrophages (pMACs) through paracrine effects. This study investigates the hypothesis that direct interaction of TCs with pMACs will also play a significant role in immunoregulation of pMACs...
April 3, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29604385/cardiac-telocytes-from-basic-science-to-cardiac-diseases-ii-acute-myocardial-infarction
#14
REVIEW
Sorin Hostiuc, Mihai Marinescu, Mihnea Costescu, Maria Aluaș, Ionut Negoi
INTRODUCTION: The purpose of this study was to evaluate scientific proof regarding a potential role of telocytes in myocardial infarction. MATERIALS AND METHODS: To this purpose, we performed a systematic review of relevant scientific literature, indexed in PubMed, Web of Science, and Scopus. RESULTS AND DISCUSSIONS: We found six articles containing relevant studies aimed at liking myocardial infarction and telocytes. The studies that were analysed in this review failed to show, beyond a reasonable doubt, that telocytes do actually have significant roles in myocardial regeneration after myocardial infarction...
March 28, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29533546/telocytes-in-the-female-reproductive-system-an-overview-of-up-to-date-knowledge
#15
REVIEW
Przemysław Janas, Iwona Kucybała, Małgorzata Radoń-Pokracka, Hubert Huras
Telocytes are emerging cell population localized in the stroma of numerous organs, characterized by a distinctive morphology - small cell body with very long, slender prolongations, termed telopodes. Those cells can be found in the whole female reproductive system: in the vagina, uterus, oviducts and ovaries, mammary glands and also in the placenta. In our review, we aim at complete and transparent revision of the current knowledge of telocytes' localization and function, enriched by the analysis of the possible future direction of development of their clinical applications...
March 13, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29508436/cd117-and-vimentin-positive-telocytes-in-the-bovine-teat-sphincter
#16
M G Wagener, S Leonhard-Marek, J-D Häger, C Pfarrer
Mastitis is a common economically relevant problem in dairy farming. As the major entry for pathogens is the papillary duct, one of the first defence mechanisms is the teat sphincter. This sphincter shows a rhythmic contractility of yet unknown origin. Searching for possible modulatory pacemaker cells, teat sphincters of eight cows were stained immunohistochemically with antibodies against CD117 and vimentin and evaluated microscopically for the presence of telocytes. CD117- and vimentin-positive telocytes with telopodes were found in close contact with smooth muscle cells...
June 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29486293/familial-pdgfra-mutation-syndrome-somatic-and-gastrointestinal-phenotype
#17
Paul N Manley, Suzan Abu-Abed, Richard Kirsch, Andrea Hawrysh, Nicole Perrier, Harriet Feilotter, Aaron Pollett, Robert Riddell, Lawrence Hookey, Jagdeep S Walia
Germline activating platelet derived growth factor receptor alpha (PDGFRA) mutations have been described in four families. All the index patients have presented with multiple mesenchymal tumors of the gastrointestinal tract. We identified a fifth family with four first-degree relatives that harbor a PDGFRA exon 18 (D846V) germline mutation. The affected kindred have a unique phenotype including coarse facies and skin, broad hands and feet, and previously undescribed premature tooth loss. While the index patient presented with multiple small bowel inflammatory fibroid polyps (IFPs) and has a gastric gastrointestinal stromal tumor (GIST), no tumors have yet been identified in other family members...
February 24, 2018: Human Pathology
https://www.readbyqxmd.com/read/29483562/morphological-evidence-of-telocytes-in-human-synovium
#18
Irene Rosa, Mirca Marini, Daniele Guasti, Lidia Ibba-Manneschi, Mirko Manetti
A new cell type named telocyte (i.e. cell with distinctive prolongations called telopodes) has recently been identified in the stroma of various organs in humans. However, no study has yet reported the existence of telocytes in the synovial membrane of diarthrodial joints. This work was therefore undertaken to search for telocytes in the normal human synovium using transmission electron microscopy, immunohistochemistry and immunofluorescence. Ultrastructural analyses demonstrated the presence of numerous spindle-shaped telocytes in the whole synovial sublining layer...
February 26, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29472628/ultrastructural-and-immunohistochemical-features-of-telocytes-in-placental-villi-in-preeclampsia
#19
Natalia V Nizyaeva, Tatiana V Sukhacheva, Roman A Serov, Galina V Kulikova, Marina N Nagovitsyna, Natalia E Kan, Victor L Tyutyunnik, Stanislav V Pavlovich, Rimma A Poltavtseva, Ekaterina L Yarotskaya, Aleksandr I Shchegolev, Gennadiy T Sukhikh
A new cell type, interstitial Cajal-like cell (ICLC), was recently described in different organs. The name was recently changed to telocytes (TCs), and their typical thin, long processes have been named telopodes (Tp). TCs regulate the contractile activity of smooth muscle cells and play a role in regulating vessel contractions. Although the placenta is not an innervated organ, we believe that TCs are present in the placenta. We studied placenta samples from physiological pregnancies and in different variants of preeclampsia (PE)...
February 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317071/recently-discovered-interstitial-cells-telocytes-as-players-in-the-pathogenesis-of-uterine-leiomyomas
#20
Ivan Varga, Martin Klein, Ladislav Urban, Ludovit Danihel, Stefan Polak, Ludovit Danihel
Uterine telocytes are interstitial cells characterized by a very long cytoplasmic prolongations, which form a 3D network, functionally integrating a wide variety of different cells. Leiomyomas (uterine fibroids) are benign tumors, which pose a huge threat concerning various health problems in women affected by this condition. The exact cause of leiomyomas development is, however, still largely unknown. Therefore, in an attempt to clarify their etiology, we performed an immunohistochemical characterization of telocytes in leiomyomas as well as in normal myometrium...
January 2018: Medical Hypotheses
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