Search results for "Embryo"

Oral contraceptive use and salivary C-erbB-2, CEA and CA15-3 in healthy women: a case-control study.

2009

Objectives: Oral contraceptives (OCP) are highly effective, safe and widely used. Higher exposure to endogenous and exogenous estrogens is generally thought to increase the risk of breast cancer. Therefore, this study was conducted to determine if oral contraceptive use affected the expression of CA 15-3, CEA and C-erb B-2 in the saliva of healthy women. Study design: The participants consisted of 87 healthy women (43 controls and 44 using oral contraceptives) ranging in age from 20 to 54 years. The volunteers participated by giving one ? time stimulated whole saliva samples. Then the samples were analysed for CA 15-3, CEA and C-erb B-2 concentrations. Results: The student t-test was used t…

CTCF and BORIS Regulate Rb2/p130 Gene Transcription: A Novel Mechanism and a New Paradigm for Understanding the Biology of Lung Cancer

2011

Abstract Although innumerable investigations regarding the biology of lung cancer have been carried out, many aspects thereof remain to be addressed, including the role played by the retinoblastoma-related protein Rb2/p130 during the evolution of this disease. Here we report novel findings on the mechanisms that control Rb2/p130 gene expression in lung fibroblasts and characterize the effects of Rb2/p130 deregulation on the proliferative features of lung cancer cells. We revealed for the first time that in lung fibroblasts the expression of Rb2/p130 gene is directly controlled by the chromatin insulator CCCTC-binding factor, CTCF, which by binding to the Rb2/p130 gene promoter induces, and/…

CD133 expression in placenta chorioangioma presenting as a giant asymptomatic mass

2021

Background: Placental chorioangioma is the most common benign non-trophoblastic neoplasm of the placenta. Its clinical relevance lies in the size of the tumor since larger masses cause pregnancy complications, including an unfavorable neonatal outcome. Case presentation: We report the case of a 34-year-old second gravida and nullipara at the 35th week of gestation, admitted to the gynecological department for antibiotic-resistant fever. The cardiotocography performed during hospitalization showed an abnormal fetal pattern. A 2250 g newborn was delivered by cesarean section. No complications were observed during childbirth and postpartum was insignificant. On gross inspection a white fleshy …

Impaired in vivo vasculogenic potential of endothelial progenitor cells in comparison to human umbilical vein endothelial cells in a spheroid-based i…

2009

Objectives:  Neovascularization represents a major challenge in tissue engineering applications since implantation of voluminous grafts without sufficient vascularity results in hypoxic cell death of implanted cells. An attractive therapeutic approach to overcome this is based on co-implantation of endothelial cells to create vascular networks. We have investigated the potential of human endothelial progenitor cells (EPC) to form functional blood vessels in vivo in direct comparison to vascular-derived endothelial cells, represented by human umbilical vein endothelial cells (HUVEC). Materials and methods:  EPCs were isolated from human peripheral blood, expanded in vitro and analysed in vit…

Matrix-mediated canal formation in primmorphs from the sponge Suberites domuncula involves the expression of a CD36 receptor-ligand system.

2004

Sponges (Porifera), represent the phylogenetically oldest metazoan phylum still extant today. Recently, molecular biological studies provided compelling evidence that these animals share basic receptor/ligand systems, especially those involved in bodyplan formation and in immune recognition, with the higher metazoan phyla. An in vitro cell/organ-like culture system, the primmorphs, has been established that consists of proliferating and differentiating cells, but no canals of the aquiferous system. We show that after the transfer of primmorphs from the demosponge Suberites domuncula to a homologous matrix (galectin), canal-like structures are formed in these 3D-cell aggregates. In parallel …

Tumor-specific T cell activation by recombinant immunoreceptors: CD3 zeta signaling and CD28 costimulation are simultaneously required for efficient …

2001

Abstract Recombinant immunoreceptors with specificity for the carcinoembryonic Ag (CEA) can redirect grafted T cells to a MHC/Ag-independent antitumor response. To analyze receptor-mediated cellular activation in the context of CD28 costimulation, we generated: 1) CEA+ colorectal tumor cells that express simultaneously B7-1 and B7-2, and 2) CEA-specific immunoreceptors that harbor intracellularly the signaling moities either of CD28 (BW431/26-scFv-Fc-CD28), CD3ζ (BW431/26-scFv-Fc-CD3ζ), or FcεRIγ (BW431/26-scFv-Fc-γ). By retroviral gene transfer, we grafted activated T cells from the peripheral blood with these immunoreceptors. T cells that express the FcεRIγ or CD3ζ signaling receptor lyse…

Effects of high and low intensità magnetic fields on pollen behaviour of Citrus clementina Hort. ex Tan. and Pinus pinea L.

2003

The Ambulacraria-specific COMPASS-like protein contributes to sns5 chromatin insulator function in the sea urchin embryo

2013

Deteriorated stabilization of walking in individuals with spastic cerebral palsy revealed by a simulated tripping perturbation

2014

Abstract. The aim of this study was to make use of a pr eviously introduced method of a simulated tripping perturbation to examine stability of walking in individuals with and with out cerebral palsy. This tripping perturbation is a forward-dynamics analys is, and it works so that in a subjec t-specific muscle-driven simulation of walking, created from experimental gait data, a force is applied to the swin g-foot, and resulting changes in the kinematics are observed. Here, changes in the fore-aft position of the trunk were analyzed. Subjects were 10 children with spastic diplegic cerebral palsy and eight un impaired children walking at their self-sel ected speed. Several tripping perturbati…

Relationship between autophagy and apoptosis in Paracentrotus lividus embryos cadmium exposed

2011

Cadmium is a strong toxicant for living organism since it does not have biological roles and can cause several cellular damages comprising genotoxicity, oxidative stress, and other biochemical dysfunctions. Marine invertebrate embryos represent a suitable model system where to investigate the effects of many stressors on development and cell viability. Here we investigated the toxic effect of cadmium on sea urchin Paracentrotus lividus embryos focusing our attention on metal-inducead autophagy and the possible temporal and functional relationship with apoptosis. Using several techniques to detect autophagy (neutral red, acridine orange and LC3-detection) we demonstrated that Cd-exposed P. l…