Search results for "BLAST"

Estudio del contenido y del estado mitocondrial en el blastocisto humano

2022

El contenido de ácido desoxirribonucleico (ADN) mitocondrial (ADNmt) por célula como marcador de viabilidad embrionaria se propuso como una estrategia muy innovadora para la priorización en la selección de embriones humanos en los tratamientos reproducción asistida, siendo los embriones con menor contenido mitocondrial por célula los candidatos a ser transferidos. La hipótesis de partida se basaba en que dichos embriones presentarían un estado metabólico más apropiado y un menor estrés celular, los cuales se traducirían en una mayor probabilidad de implantación. La elevada expectación inicialmente generada alrededor de este marcador, vino acompañada de publicaciones con resultados contradic…

Kolesterolin esiintyminen ihmisen hermostollisissa syöpäsoluissa

2008

Mouse A6 stem cells release active FGF-2 into extracellular space through plasma membrane vesicles

2007

In this study, mouse mesoangioblasts were seeded onto bidimensional matrices within three-dimensional porous scaffolds of poly (L-lactic acid) (PLLA), in the presence or absence of a type I collagen coating. The cells were observed under a scanning electron microscope and tested for their adhesion, survival and proliferation. Immunolocalization of heat shock protein (Hsp) 70, an abundant and ubiquitous intracellular protein in these cells, was also performed in sectioned cell-containing scaffolds under a confocal fluorescence microscope to determine if in situ analysis of intracellular constituents was feasible. The data show that PLLA films allow direct cell adhesion and represent an optim…

Segmental resection for the excision of two multicystic ameloblastoma

2014

Objectives. The purpose of this study was addressed at the understanding and management in the ameloblastoma treatment, performing a segmental surgical resection. Ameloblastoma represents nearly 1% of all neoplasm located  Annali di Stomatologia 2014; Suppl. 3 to n. 2: 1-41 15 in the oral cavity. In 80% of cases it could be found in the mandible, of these lesions 70% are located in the molar re- gion or the ascending ramus, 20% in the premolar region and 10% in the anterior part. It is considered as a benign neoplasm with slow growing-pattern and locally aggressive behaviour. Methods. On the basis of clinicoradiological findings, ameloblastoma is divided into 3 groups: solid or multicyst…

Cytokine Interferon-γ suppresses the function of capsule myofibroblasts and induces cell apoptosis

2017

Myofibroblasts (MFs), a contractile subset of fibroblasts, play a pivotal role in physiological wound healing and in the development of many fibroconnective disorders. The complex cytokine network regulating the function of MFs in joint stiffness is still poorly understood. In this in vitro study, we investigated the effect of the cytokine Interferon-gamma (IFN-γ) on MFs isolated from human joint capsules. MFs were cultivated either in the presence of increasing concentrations of IFN-γ alone or in combination with IFN-γ neutralizing antibodies. Cell viability, cytotoxicity, apoptosis, and mRNA gene expression of the MF markers alpha-smooth muscle actin (α-SMA) and collagen type I were analy…

The utility of SATB2 immunohistochemical expression in distinguishing between osteosarcomas and their malignant bone tumor mimickers, such as Ewing s…

2016

SATB2 is commonly expressed in osteosarcomas. Although apparently being a valuable diagnostic marker for differentiating between small cell osteosarcoma (SCO) and other small round cell tumors of bone, for instance Ewing sarcoma family of tumors (ESFT), it has not been tested in a large series of ESFT and chondrosarcomas so far. We studied the immunohistochemical expression of SATB2 in 42 osteosarcomas, 31 chondrosarcomas, and 371 genetically confirmed ESFT. SATB2 positivity was detected in 90.4% of osteosarcomas, 87.5% of SCO, 91.3% of osteoblastic osteosarcomas, and in all chondroblastic and parosteal osteosarcomas. The osteoblastic and SCO subtypes expressed SATB2 more intensely than oth…

2016

Background Contractile myofibroblasts (MFs) accumulate in the joint capsules of patients suffering from posttraumatic joint stiffness. MF activation is controlled by a complex local network of growth factors and cytokines, ending in the increased production of extracellular matrix components followed by soft tissue contracture. Despite the tremendous growth of knowledge in this field, inconsistencies remain in practice and prevention.

Anti-senescence and Anti-inflammatory Effects of the C-terminal Moiety of PTHrP Peptides in OA Osteoblasts.

2016

Osteoarthritis (OA) is characterized by degenerative changes in the whole joint leading to physical disability in the elderly population. This condition is associated with altered bone metabolism in subchondral areas suggesting that therapeutic strategies aimed at modifying bone cell metabolism may be of interest. We have investigated the effects of several parathyroid hormone-related protein (PTHrP)-derived peptides (1-37): (N-terminal), (107-111) and (107-139) (C-terminal) on senescence features induced by inflammatory stress in human OA osteoblasts. Incubation of these primary cells with interleukin(IL)-1β led to an increased expression of senescence markers senescence-associated-β-galac…

Influence of the anti-inflammatory cytokine interleukin-4 on human joint capsule myofibroblasts

2016

Post-traumatic joint contracture was reported to be associated with elevated numbers of contractile myofibroblasts (MFs) in the healing capsule. During the physiological healing process, the number of MFs declines; however, in fibroconnective disorders, MFs persist. The manifold interaction of the cytokines regulating the appearance and persistence of MFs in the pathogenesis of joint contracture remains to be elucidated. The objective of our current study was to analyze the impact of the anti-inflammatory cytokine interleukin (IL)-4 on functional behavior of MFs. Cells were isolated from human joint capsule specimens and challenged with three different concentrations of IL-4 with or without…

miR-7 Restores Phenotypes in Myotonic Dystrophy Muscle Cells by Repressing Hyperactivated Autophagy

2019

International audience; Unstable CTG expansions in the 3' UTR of the DMPK gene are responsible for myotonic dystrophy type 1 (DM1) condition. Muscle dysfunction is one of the main contributors to DM1 mortality and morbidity. Pathways by which mutant DMPK trigger muscle defects, however, are not fully understood. We previously reported that miR-7 was downregulated in a DM1 Drosophila model and in biopsies from patients. Here, using DM1 and normal muscle cells, we investigated whether miR-7 contributes to the muscle phenotype by studying the consequences of replenishing or blocking miR-7, respectively. Restoration of miR-7 with agomiR-7 was sufficient to rescue DM1 myoblast fusion defects and…