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Telocytes

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https://www.readbyqxmd.com/read/29317071/recently-discovered-interstitial-cells-telocytes-as-players-in-the-pathogenesis-of-uterine-leiomyomas
#1
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
https://www.readbyqxmd.com/read/29314148/3d-reconstruction-of-the-porcine-and-equine-pulmonary-veins-supplemented-with-the-identification-of-telocytes-in-the-horse
#2
T Vandecasteele, W Van Den Broeck, H Tay, L Couck, G van Loon, P Cornillie
The myocardial sleeve of the porcine and equine pulmonary veins were histologically investigated and reconstructed three dimensionally. Moreover, the localization of neuron cell bodies at the veno-atrial junction and alongside the myocardial sleeve was light microscopically visualized to depict the organization of nerve, myocardial and fat tissue. Finally, the presence of telocytes inside the equine pulmonary veins was demonstrated by use of transmission electron microscopy. These structures are thought to play a role in the induction of atrial fibrillation, which is frequently seen in horses, while pigs are often used as a cardiovascular model in this context...
January 3, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29250650/pv-1-expression-could-distinguish-the-subset-of-caveolae-presenting-telocytes-that-are-endothelial-progenitors
#3
Alexandra Diana Vrapciu, Mugurel Constantin Rusu
Telocytes (TCs) are stromal cells with characteristic long, thin and moniliform prolongations termed telopodes. They were formerly termed interstitial Cajal-like cells. A characteristic set of markers to identify TCs in light microscopy has not been established until now. Transmission electron microscopy (TEM) is a better tool for identifying TCs. Telocytes display caveolae and can express caveolin-1. On the other hand, endothelial cells (ECs) as well as endothelial progenitor cells (EPCs) have caveolae. Recent evidence suggests that a subset of TCs are in fact EPCs...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/29199635/melatonin-elicits-stimulatory-action-on-the-adrenal-gland-of-soay-ram-morphometrical-immunohistochemical-and-ultrastructural-study
#4
Doaa M Mokhtar, Manal T Hussein, Ahmed H S Hassan
Endogenous melatonin is a hormone secreted by pineal gland; it has several roles in metabolism, reproduction, and remarkable antioxidant properties. Studies on the melatonin effect on the adrenal glands which are important endocrine organs, controlling essential physiological functions, are still deficient. In this study, we attempted to investigate the effect of exogenous melatonin treatment on the adrenal cortex and medulla using several approaches. Adrenal glands of 15 Soay ram were examined to detect the effect of melatonin treatment...
December 4, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/29178069/mitochondrial-dna-in-telocytes
#5
Dongli Song, Dragos Cretoiu, Xiangdong Wang
Telocyte (TC) is a new identified interstitial cell type with a small nuclear and one or several long and thin prolongations with enlargements on them. They were found in many mammals including humans, mouse, rats, dogs, and monkeys and play vital roles in many physiological and pathological conditions. The ultrastructure of mitochondria was observed in TCs, and the alterations were found in TCs from inflammatory ureter tissue. MtDNA is associated with mitochondria normal functions and involved in physiological and pathological processes...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29153593/the-molecular-phenotypes-of-ureteral-telocytes-are-layer-specific
#6
M A Dobra, A D Vrapciu, F Pop, N Petre, M C Rusu
Telocytes (TC) are the delicate interstitial (stromal) cells defined by their long, thin and moniliform processes termed telopodes. Numerous studies determined that different subsets of telocytes populate almost all tissues and attempted to relate these subsets to various functions, from cell signaling to tissue repair and regeneration. Extremely few studies addressed the urinary tract though few data on the molecular pattern of the urinary TCs actually exist. We therefore hypothesized that subsets of urinary TCs co-localize within the human ureter and we aimed at performing an immunohistochemical study to evaluate the tissue-specific molecular pattern of TCs...
November 16, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/29148209/telocytes-in-the-human-sinoatrial-node
#7
Lubov B Mitrofanova, Andrey N Gorshkov, Petr V Konovalov, Julia S Krylova
The sinoatrial node (SAN) is composed mostly of pacemaker, transitional and Purkinje-like cells. Pacemaker cells, especially in the centre of the SAN, are surrounded by dense fibrous tissue and do not have any contact with transitional cells. We hypothesize that the SAN contains telocytes that have contacts with pacemaker cells and contractile myocardium. Immunohistochemistry using antibodies against HCN4 and antibody combinations against CD34 and HCN4 was carried out on 12 specimens. Confocal laser scanning microscopy (CLSM) with two mixtures of primary antibodies, namely CD34/S100 and vimentin/S100, was performed in three cases...
November 17, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29117147/the-na-k-atpase-%C3%AE-subunit-isoforms-expression-in-glioblastoma-multiforme-moonlighting-roles
#8
Deborah Rotoli, Mariana-Mayela Cejas, María-Del-Carmen Maeso, Natalia-Dolores Pérez-Rodríguez, Manuel Morales, Julio Ávila, Ali Mobasheri, Pablo Martín-Vasallo
Glioblastoma multiforme (GBM) is the most common form of malignant glioma. Recent studies point out that gliomas exploit ion channels and transporters, including Na, K-ATPase, to sustain their singular growth and invasion as they invade the brain parenchyma. Moreover, the different isoforms of the β-subunit of Na, K-ATPase have been implicated in regulating cellular dynamics, particularly during cancer progression. The aim of this study was to determine the Na, K-ATPase β subunit isoform subcellular expression patterns in all cell types responsible for microenvironment heterogeneity of GBM using immunohistochemical analysis...
November 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29051571/a-new-cellular-type-in-invertebrates-first-evidence-of-telocytes-in-leech-hirudo-medicinalis
#9
Laura Pulze, Nicolò Baranzini, Rossana Girardello, Annalisa Grimaldi, Lidia Ibba-Manneschi, Enzo Ottaviani, Marcella Reguzzoni, Gianluca Tettamanti, Magda de Eguileor
Telocytes, a peculiar cell type, were recently found in vertebrates. Hence this cell system has been reported as ubiquitous in the bodies of mammals and interpreted as an important player in innate immunity and tissue regeneration, it is reasonable to look for it also in invertebrates, that rely their integrity solely by innate immunity. Here we describe, at morphological and functional level, invertebrate telocytes from the body of leech Hirudo medicinalis (Annelida), suggesting how these cells, forming a resident stromal 3D network, can influence or participate in different events...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29022261/the-non-cardiomyocyte-cells-of-the-heart-their-possible-roles-in-exercise-induced-cardiac-regeneration-and-remodeling
#10
Ivan Varga, Jan Kyselovič, Paulina Galfiova, Lubos Danisovic
The non-cardiomyocyte cellular microenvironment of the heart includes diverse types of cells of mesenchymal origin. During development, the majority of these cells derive from the epicardium, while a subset derives from the endothelium/endocardium and neural crest derived mesenchyme. This subset includes cardiac fibroblasts and telocytes, the latter of which are a controversial type of "connecting cell" that support resident cardiac progenitors in the postnatal heart. Smooth muscle cells, pericytes, and endothelial cells are also present, in addition to adipocytes, which accumulate as epicardial adipose connective tissue...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28943000/histological-and-immunohistochemical-study-of-cardiac-telocytes-in-a-rat-model-of-isoproterenol-induced-myocardial-infarction-with-a-reference-to-the-effect-of-grape-seed-extract
#11
Mai Salah Nour, Nahla Reda Sarhan, Shireen A Mazroa, Salwa A Gawish
INTRODUCTION: Cardiac telocytes (TCs) represent a unique type of cells that make a supportive network for stem cells that contribute in cardiac renewal, but their role during myocardial infarction (MI) is not clear. Grape seed extract (GSE) is a powerful natural antioxidant. AIM OF THE WORK: Quantitative study of cardiac TCs in a rat model of Isoproterenol (ISO)-induced MI, and to evaluate the effect of GSE on TCs and MI progression. MATERIALS AND METHODS: Seventy adult male albino rats were assigned into 4 groups; group I; control rats, group II received GSE (100mg/kg/day) dissolved in distilled water orally, group III received 2 intra-peritoneal injections of 85mg/kg ISO dissolved in saline on 14th and 15th day to induce MI, and group IV received GSE and ISO...
September 21, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28936744/cardiac-telocyte-derived-exosomes-and-their-possible-implications-in-cardiovascular-pathophysiology
#12
Mirca Marini, Lidia Ibba-Manneschi, Mirko Manetti
Among cardiac interstitial cells, the recently described telocytes (TCs) display the unique ability to build a supportive three-dimensional network formed by their very long and thin prolongations named telopodes. Cardiac TCs are increasingly regarded as pivotal regulators in intercellular signaling with multiple cell types, such as cardiomyocytes, stem/progenitor cells, microvessels, nerve endings, fibroblasts and immune cells, thus converting the cardiac stromal compartment into an integrated system that may drive either heart development or maintenance of cardiac homeostasis in post-natal life...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28884484/identification-of-telocytes-in-the-porcine-heart
#13
H Tay, T Vandecasteele, W Van den Broeck
Recently, a new interstitial cell type called telocyte has been identified. Telocytes are found in many organs including the heart, where they are especially well described. However, their presence in the porcine heart has not yet been proven. The pig is a valuable animal model in research because of its resemblance with man, making it interesting to determine whether telocytes can be found in pigs as well. The focus of this study is the identification and ultrastructural description of telocytes in the heart tissue of pig...
September 7, 2017: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/28840644/telocytes-play-a-key-role-in-prostate-tissue-organisation-during-the-gland-morphogenesis
#14
Bruno D A Sanches, Juliana S Maldarine, Bruno C Zani, Guilherme H Tamarindo, Manoel F Biancardi, Fernanda C A Santos, Paula Rahal, Rejane M Góes, Sérgio L Felisbino, Patricia S L Vilamaior, Sebastião R Taboga
Telocytes are CD34-positive interstitial cells, known to exert several functions, one of which is a role in tissue organisation, previously demonstrated by telocytes in the myocardium. The existence of telocytes in the prostate has recently been reported, however, there is a lack of information regarding the function of these cells in prostate tissue, and information regarding the possible role of these cells in prostatic development. This study used immunofluorescence techniques in prostate tissue and prostatic telocytes in culture to determine the relationship between telocytes and prostate morphogenesis...
August 24, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28828051/telocytes-a-hope-for-cardiac-repair-after-myocardial-infarction
#15
Ruxandra Dragoi Galrinho, Catalin Gabriel Manole, Dragos Vinereanu
Cardiovascular diseases, particularly myocardial infarction, remain the leading cause of morbidity and mortality worldwide, even though pharmacological and interventional therapies improved significantly in the last years. Moreover, despite encouraging results of cell - based therapies in experimental myocardial infarction models, clinical trials showed inconsistent and modest efficiency. Therefore the next step should be the revealing of a new cell type, capable of regenerating the damaged myocardium. Telocytes (TCs), a relatively new type of interstitial cells, were described few years ago and are credited with important roles in regenerative therapies...
December 2016: Mædica
https://www.readbyqxmd.com/read/28782880/adaptive-changes-of-telocytes-in-the-urinary-bladder-of-patients-affected-by-neurogenic-detrusor-overactivity
#16
Chiara Traini, Maria-Simonetta Fausssone-Pellegrini, Daniele Guasti, Giulio Del Popolo, Jacopo Frizzi, Sergio Serni, Maria-Giuliana Vannucchi
Urinary bladder activity involves central and autonomic nervous systems and bladder wall. Studies on the pathogenesis of voiding disorders such as the neurogenic detrusor overactivity (NDO) due to suprasacral spinal cord lesions have emphasized the importance of an abnormal handling of the afferent signals from urothelium and lamina propria (LP). In the LP (and detrusor), three types of telocytes (TC) are present and form a 3D-network. TC are stromal cells able to form the scaffold that contains and organizes the connective components, to serve as guide for tissue (re)-modelling, to produce trophic and/or regulatory molecules, to share privileged contacts with the immune cells...
August 7, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28730229/molecular-analysis-of-brca1-and-brca2-genes-by-next-generation-sequencing-and-ultrastructural-aspects-of-breast-tumor-tissue
#17
Corina Elena Mihalcea, Ana Maria Moroşanu, Daniela Murăraşu, Liliana Puiu, Sabin Aurel Cinca, Silviu Cristian Voinea, Nicolae Mirancea
In this paper, we focus our interest on the dynamics alterations of the tumor-stroma interface at the ultrastructural level and to detect BRCA1 and BRCA2 mutations using next generation sequencing (NGS) of breast tumor tissue. Electron microscopic investigation revealed some peculiar infrastructural alterations of the tumor cells per se as well as of the tumor-stroma interface: invadopodia, shedding microvesicles, altered morphology and reduced number of telocytes, different abnormalities of the microvasculature...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28714595/telocytes-in-normal-and-keratoconic-human-cornea-an-immunohistochemical-and-transmission-electron-microscopy-study
#18
Mirca Marini, Rita Mencucci, Irene Rosa, Eleonora Favuzza, Daniele Guasti, Lidia Ibba-Manneschi, Mirko Manetti
Telocytes (TC) are typically defined as cells with telopodes by their ultrastructural features. Their presence was reported in the interstitium of various organs in vertebrates, including humans. However, no study has yet described the presence of TC in the human eye and in particular, within the stromal compartment of the cornea. To address this issue, samples of normal and pathologic (keratoconic) human corneas were tested by immunohistochemistry for CD34, platelet-derived growth factor receptor α (PDGFRα) and c-kit/CD117 or examined by transmission electron microscopy...
July 17, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28608858/telocytes-facts-speculations-and-myths-review-article
#19
Veronika Aleksandrovych, Artur Pasternak, Paweł Basta, Marek Sajewicz, Jerzy A Walocha, Krzysztof Gil
Telocyte (TC) is an interstitial cell type with a small cellular body and extremely long tentacle-like extensions. TCs were discovered a decade ago and have specifc morphological characteristics, immunohistochemical and secretome profiles, electrophysiological properties, microRNA expression. Moreover, they are different in gene expression from other cells. TCs play an important role in plenty of processes. Apparently, they are involved in homeostasis, remodelling, regeneration, repair, embryogenesis, angiogenesis and even tumorigenesis...
2017: Folia Medica Cracoviensia
https://www.readbyqxmd.com/read/28532862/telocytes-connective-tissue-repair-and-communication-cells
#20
EDITORIAL
Leon Chaitow
No abstract text is available yet for this article.
April 2017: Journal of Bodywork and Movement Therapies
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