Search Results
Results 401 - 450 of 2173
< 4 5 6 7 8 9 10 11 12 13 14 >
Gerhart Jacquelyn - - 2007
The epiblast of the chick embryo contains cells that express MyoD mRNA but not MyoD protein. We investigated whether MyoD-positive (MyoDpos) epiblast cells are stably committed to the skeletal muscle lineage or whether their fate can be altered in different environments. A small number of MyoDpos epiblast cells were tracked ...
de Jongh Rik - - 2007
OBJECTIVES: To establish the functional consequences of exposing the isolated whole bladder preparation to exogenous prostaglandins (PGE(1), PGE(2), PGF(2alpha)) and to determine which cells express cyclooxygenase (COX) types I and II, to generate PG to effect these changes in vivo. MATERIALS AND METHODS: Fifteen female guinea pigs (270-350 g) were ...
Gierer Philip - - 2007
OBJECTIVE: Extensive surgical trauma leads to activation of the coagulation cascade and is often complicated by systemic inflammation and infection. Activated protein C, a natural coagulatory inhibitor, was recently shown to reduce mortality in septic patients. We herein report on the actions of activated protein C on skeletal muscle injury ...
Chen Chun-Hung - - 2007
Cell transplantation via local intramuscular injection is a promising therapy. However, the cells used are usually expanded in vitro and dissociated by trypsinization, which may be harmful to the cells. In the study, a novel method for the construction of fragmented sheets of mesenchymal stem cells (MSCs) with a uniform ...
Giangrande Paloma H - - 2007
Intimal hyperplasia (IH) and restenosis limit the long-term utility of bypass surgery and angioplasty due to pathological proliferation and migration of vascular smooth muscle cells (VSMCs) into the intima of treated vessels. Consequently, much attention has been focused on developing inhibitory agents that reduce this pathogenic process. The E2F transcription ...
Romano Francesca - - 2007
When chronically stimulated with agonists of contraction, smooth muscle cells (SMCs) undergo cell hypertrophy, a process defined as increase in size and potentiation of the contractile phenotype in the absence of proliferation. Hypertrophic response has long been associated to a number of pathologies of the cardiovascular and respiratory systems. We ...
Kolb S - - 2007
Apoptosis participates in every step of atherogenesis, but the process of clearance of apoptotic cells by phagocytosis has been underestimated. Rapid removal of apoptotic cells is critical for tissue homeostasis, in order to avoid accumulation of necrotic material and subsequent inflammation in the pathological vascular wall. We have demonstrated by ...
Menasché Philippe - - 2007
Cell transplantation is emerging as a new treatment designed to improve the poor outcome of patients with cardiac failure. Its rationale is that implantation of contractile cells into postinfarction scars could functionally rejuvenate these areas. Primarily for practical reasons, autologous skeletal myoblasts have been the first to be considered for ...
Pucovský Vladimír - - 2007
This work aimed to establish the lineage of cells similar to the interstitial cells of Cajal (ICC), the arterial ICC-like (AIL) cells, which have recently been described in resistance arteries, and to study their location in the artery wall. Segments of guinea-pig mesenteric arteries and single AIL cells freshly isolated ...
Li Li - - 2007
BACKGROUND: Implantation of a haemodialysis arteriovenous graft is often followed by the development of neointimal hyperplasia (NH) at the venous anastomosis. The nature of the proliferating cells in these lesions is not well understood. A better understanding of the cells contributing to NH is important to the development of preventive ...
Banerjee Indroneal - - 2007
Cardiac fibroblasts, myocytes, endothelial cells, and vascular smooth muscle cells are the major cellular constituents of the heart. The aim of this study was to observe alterations in myocardial cell populations during early neonatal development in the adult animal and to observe any variations of the cardiac cell populations in ...
Fukada So-ichiro - - 2007
Skeletal muscle satellite cells play key roles in postnatal muscle growth and regeneration. To study molecular regulation of satellite cells, we directly prepared satellite cells from 8- to 12-week-old C57BL/6 mice and performed genome-wide gene expression analysis. Compared with activated/cycling satellite cells, 507 genes were highly upregulated in quiescent satellite ...
Fascetti-Leon Francesco - - 2007
BACKGROUND: Mini-invasive techniques for gastroesophageal reflux disease (GERD), such as endoscopic injections of inert materials, have been introduced in recent years. However, results are still preliminary. Cell injection has emerged as an alternative strategy in both vesicoureteral reflux and incontinence. Here we report, for the first time, the injection of ...
Bridger P S - - 2007
In order to study feto-maternal interactions in the bovine synepitheliochorial placenta primary cell cultures of both placentomal components throughout pregnancy, namely caruncular epithelial cells and trophoblast cells were developed. The aim of this study was to validate and improve a method to culture caruncular epithelial cells and fetal trophoblast from ...
Daggett David F DF Department of Molecular and Cell Biology and Center for Integrative Genomics, University of California, Berkeley, Berkeley, CA 94720-3200, - - 2007
As the vertebrate myotome is generated, myogenic precursor cells undergo extensive and coordinated movements as they differentiate into properly positioned embryonic muscle fibers. In the zebrafish, the "adaxial" cells adjacent to the notochord are the first muscle precursors to be specified. After initially differentiating into slow-twitch myosin-expressing muscle fibers, these ...
Gui Yu - - 2007
Somatic mutations in the tuberous sclerosis complex-2 (TSC2) gene are associated with pulmonary lymphangioleiomyomatosis (LAM), a disorder characterized by benign lesions of smooth muscle and/or smooth muscle-like cells in the lung. However, the cellular mechanisms underlying LAM disease are largely unknown. Given that the TSC2 gene product tuberin is involved ...
Van der Aa, Frank
The urinary bladder is a hollow structure, consisting mainly of smooth muscle cell bundles under neural control. It has two important functions: storage and emptying. During storage it must maintain low pressure. During emptying all smooth muscle bundles must contract synchronously. The neural control functions as an on/off switch. During ...
Cossu Giulio - - 2007
Satellite cells are crucial for maintaining muscle homeostasis and for regeneration following injury. In this issue, Kuang et al. (2007) reveal that muscle satellite cells are a heterogeneous mixture of stem cells and committed myogenic progenitors. They show that asymmetric division of stem cells in the satellite cell niche is ...
Aguilar Victor V INSERM, U845, Paris F-75015, France; Université Paris Descartes, UMRS-845, Paris F-75015, - - 2007
S6 kinase (S6K) deletion in metazoans causes small cell size, insulin hypersensitivity, and metabolic adaptations; however, the underlying molecular mechanisms are unclear. Here we show that S6K-deficient skeletal muscle cells have increased AMP and inorganic phosphate levels relative to ATP and phosphocreatine, causing AMP-activated protein kinase (AMPK) upregulation. Energy stress ...
Fontana M - - 2007
Prostanoids have been shown to improve exercise tolerance, hemodynamics and quality of life in patients with pulmonary arterial hypertension (PAH). We investigated whether treprostinil exerts direct contractile effects on cardiomyocytes that may explain partly the beneficial effects of these drugs. Ventricular cardiomyocytes from adult rats were paced at a constant ...
Takaki Miyako - - 2007
Using an embryoid body (EB) culture system, we developed a functional organ-like cluster, a "gut", from mouse embryonic stem (ES) cells (ES gut). Each ES gut exhibited various types of spontaneous movements. In these spontaneously contracting ES guts, dense distributions of interstitial cells of Cajal (ICC) (c-kit, a transmembrane receptor ...
Yau, Lorraine
Failure of revascularization procedures for the treatment of coronary artery disease, such as balloon angioplasty, typically occurs as a result of restenosis, a renarrowing of the lumen at the site of intervention. Restenosis is characterized by the formation of a neointimal lesion, a process that involves migration of smooth muscle ...
Figallo Elisa - - 2007
High throughput experiments can be used to spatially and temporally investigate the many factors that regulate cell differentiation. We have developed a micro-bioreactor array (MBA) that is fabricated using soft lithography and contains twelve independent micro-bioreactors perfused with culture medium. The MBA enables cultivation of cells that are either attached ...
Baumert Hervé - - 2007
OBJECTIVE: Long ureteric defects may theoretically be repaired with the use of tissue-engineered neoureter. However, attempts to construct such a neoureter in animal models have failed because of major inflammatory response. Avoidance of such inflammation requires a well-differentiated urothelium. We investigated whether omental maturation of a seeded construct in a ...
Alexakis Catherine - - 2007
Because of its mechanical function, skeletal muscle is heavily influenced by the composition of its extracellular matrix (ECM). Fibrosis generated by chronic damage, such as occurs in muscular dystrophies, is thus particularly disastrous in this tissue. Here, we examined the interrelationship between the muscle satellite cell and the production of ...
Iwasaki Masazumi - - 2007
Abdominal muscle receptor organs (MROs) monitor the position and movement of abdomen in crustaceans. Thoracic segments of decapods are fused and immovable. It is speculated that MROs had retrograded simple shape, N-cells that lost receptor muscles, a receptor cell and accessory nerves. We focused on the effect of segmental movement ...
Vemireddi Vimala - - 2007
Leiomyosarcoma was diagnosed in the uterus surgically removed from a 3-year-old pet Suffolk ewe with a history of bleeding from the vulva, spontaneous lactation, and nursing behavior. The uterus contained multiple well-circumscribed, soft, intraluminal polypoid masses of variable sizes (0.5-4 cm). The masses were red, with white, smooth, and glistening ...
Yoshida, Tsuyoshi
Background: In a heart with myocarditis, there are cardiomyocytes, inflammatory cells and non-inflammatory interstitial cells. Immunologic molecules are thought to influence not only inflammatory cells but also cardiac function and remodeling. Whatever their origin, the cells they target and crosstalk by them remain unclear. Here, we examined native gene expression ...
Molgó, Jordi
In this short article we review muscle satellite cell characteristics and our studies in adult rodent muscle satellite cells in situ. Using confocal laser scanning microscopy and immunocytochemistry, a high level of IP3 receptor (IP3R) immunostaining was detected in satellite cells. These cells were identified by their peripheral position, their ...
Jankowski V - - 2007
The purinergic receptor system plays an important role in the regulation of both vascular and tubular functions within the kidney; however, the release of purinergic agonists other than ATP by renal tissue is not known. In this investigation, we determine if kidney tissue is a source of diadenosine polyphosphates, which ...
Giannoglou George D - - 2007
Rhabdomyolysis is defined as a pathological condition of skeletal muscle cell damage leading to the release of toxic intracellular material into the blood circulation. Its major causes include trauma, ischemia, drugs, toxins, metabolic disorders, and infections. The pathophysiological hallmark of the syndrome is an increase in intracellular free ionized calcium ...
Winter E M - - 2007
During cardiogenesis, the epicardium grows from the proepicardial organ to form the outermost layer of the early heart. Part of the epicardium undergoes epithelial-mesenchymal transformation, and migrates into the myocardium. These epicardium-derived cells differentiate into interstitial fibroblasts, coronary smooth muscle cells, and perivascular fibroblasts. Moreover, epicardium-derived cells are important regulators ...
Cui Chang-Hao - - 2007
Duchenne muscular dystrophy (DMD), the most common lethal genetic disorder in children, is an X-linked recessive muscle disease characterized by the absence of dystrophin at the sarcolemma of muscle fibers. We examined a putative endometrial progenitor obtained from endometrial tissue samples to determine whether these cells repair muscular degeneration in ...
Rouger Karl - - 2007
Adult skeletal muscle possesses remarkable regenerative capacity that has conventionally been attributed to the satellite cells. These precursor cells were thought to contain distinct populations with varying myogenic potential. Recently, the identification of multipotent stem cells capable of new myofiber formation has expanded the general view on the muscle regenerative ...
Yin Xuejun J - - 2007
OBJECTIVE: This study was undertaken to investigate the effects of 17beta-estradiol (E2) on G1 cell cycle progression and proliferation in uterine fibroid and myometrial cells and the roles of phosphatidylinositol-3 kinase and mammalian target of rapamycin in mediating these estrogen effects. STUDY DESIGN: The human uterine smooth muscle-derived cells (UtSM) ...
Liang Dong - - 2007
BACKGROUND/AIMS: Injury and activation of tubular proximal epithelial cells (TEC) play central roles in renal tubulointerstitial fibrosis (TIF), but its mechanisms remain obscure. Interleukin 18 (IL-18) is overproduced during chronic kidney diseases (CKD), but how IL-18 affects the biological behaviour of TEC is not clear. The aim of the present ...
Dykes Ava C - - 2007
The effects of changes in the expression levels of h1 calponin (CaP) on actin cytoskeletal organization were studied in control and phorbol-ester-treated A7r5 smooth muscle cells. Protein association and expression in control and stimulated A7r5 smooth muscle cells were evaluated by Western blotting, laser scanning confocal microscopy (LSCM), and fluorescence ...
Pilz S - - 2007
Pre-B-cell colony-enhancing factor (PBEF) was recently found in high levels in visceral fat, and was therefore renamed visfatin. This new adipocytokine exerts insulin-mimetic effects in mice and in cultured cells by binding to and activating the insulin receptor. Despite some recent studies on this topic, the proposed role of visfatin ...
House Suzanne J - - 2007
There is accumulating evidence that Ca(2+)-dependent signaling pathways regulate proliferation and migration of vascular smooth muscle (VSM) cells, contributing to the intimal accumulation of VSM that is a hallmark of many vascular diseases. In this study we investigated the role of the multifunctional serine/threonine kinase, calmodulin (CaM)-dependent protein kinase II ...
Ringsholt Merete - - 2007
YKL-40, a 40 kDa plasma protein, is secreted by macrophages, neutrophils, chondrocytes, vascular smooth muscle cells and cancer cells. High plasma YKL-40 is found in patients with inflammatory diseases and cancer, but it is not known how the protein is expressed in tissues. This immunohistochemical study was carried out with ...
Lavoie Brigitte - - 2007
Gallbladder smooth muscle (GBSM) exhibits spontaneous rhythmic electrical activity, but the origin and propagation of this activity are not understood. We used morphological and physiological approaches to determine whether interstitial cells of Cajal (ICC) are present in the guinea pig extrahepatic biliary tree. Light microscopic studies involving Kit tyrosine kinase ...
Bhadriraju Kiran - - 2007
BACKGROUND: In anchorage dependent cells, myosin generated contractile forces affect events closely associated with adhesion such as the formation of stress fibers and focal adhesions, and temporally distal events such as entry of the cell into S-phase. As occurs in many signaling pathways, a phosphorylation reaction (in this case, phosphorylation ...
Jacques Danielle - - 2007
The 3-dimensional confocal microscopy technique has allowed us to identify the presence of yet another cardioactive factor and its receptor, namely neuropeptide Y (NPY) and its Y1 receptor, at the level of vascular smooth muscle cells and heart cells including endocardial endothelial cells (EECs). Using this technique, we also demonstrated ...
Xu Yonghua - - 2007
PURPOSE: Iododeoxyuridine (IUdR) is a halogenated pyrimidine recognized as the thymidine substitute in DNA. When labeled with iodine 125, IUdR can be used as a carrier to incorporate the isotope into DNA and target the dividing cells. The purpose of this study was to assess the maximum uptake of IUdR ...
Begueret H - - 2007
BACKGROUND: Recent observations in asthma suggest that bronchial smooth muscle is infiltrated by inflammatory cells including mast cells. Such an infiltration may contribute to airway remodelling that is partly due to an increase in smooth muscle mass. Whether muscle increase is the result of smooth muscle cell hypertrophy remains controversial ...
Shafik Ahmed - - 2007
INTRODUCTION: Specialized pacemaker cells, similar to the interstitial cells of Cajal (ICC) of the gut, have been detected in the urinary organs and are thought to pace their motile activity. AIM: We investigated the hypothesis that such cells could also exist in the corpora cavernosa (CC) of the human penis. ...
Macfelda Karin - - 2007
Myocardial cell transplantation in patients with heart failure is emerging as a potential therapeutic option to augment the function of remaining myocytes. Nevertheless, further investigations on basic issues such as ideal cell type continue to be evaluated. Therefore, the aim of our studies was to compare the performance of skeletal ...
Rishniw Mark - - 2007
Following initial patterning as differentiated smooth muscle (SM) cells, the muscularis externa of the murine esophagus is replaced by skeletal muscle, but the mechanism underlying this process is controversial. The hypothesis that committed SM cells transdifferentiate into striated muscle is not consistent with fate mapping studies. Similarly, apoptosis does not ...
Sati Leyla - - 2007
The aim of the study was to investigate the distribution and differentiation of cell types in the stroma of human placental stem villi (SV). A total of 14 human term placental tissues were studied. Double immunolabeling was performed for desmin-vimentin, desmin-alpha-smooth actin and vimentin-alpha-smooth actin. Cytokeratin 7, proliferating cell nuclear ...
Yamanouchi Keitaro - - 2007
The importance of connexins is implicated in proliferation and differentiation of cells. In skeletal muscle cells, connexin43 (Cx43) has been identified as the major connexin, and gap-junctional communication mediated by connexins has been shown to be required for their myogenic differentiation. In addition, inhibition of connexin function has been shown ...
< 4 5 6 7 8 9 10 11 12 13 14 >