Search results for "Mores"

Gel permeation chromatography, calibration, and distributions of cellulose trinitrates

1967

Cirugía de tumores retroperitoneales con afectación de vena cava: revisión de 18 casos

2018

Resumen Introducción El tumor retroperitoneal con extensión a la vena cava inferior (VCI) más frecuente es el carcinoma de células renales. Tiene una supervivencia a 5 años de hasta un 32% cuando se realiza nefrectomía radical y trombectomía. El tratamiento quirúrgico es complejo y puede necesitar el soporte de circulación extracorpórea y parada circulatoria e hipotermia. Métodos Estudio descriptivo, retrospectivo, mediante análisis de datos de pacientes intervenidos de tumores con invasión de la VCI entre 1992 y 2015. Se recogieron datos demográficos, tumorales, de técnica quirúrgica, intraoperatorios, posquirúrgicos y de mortalidad. Las variables cuantitativas se presentan como media±desv…

IL-4-mediated drug resistance in colon cancer stem cells

2008

Cancer stem cells are defined as cells able to both extensively self-renew and differentiate into progenitors. Cancer stem cells are thus likely to be responsible for maintaining or spreading a cancer, and may be the most relevant targets for cancer therapy. The CD133 glycoprotein was recently described as a reliable cancer stem-like cell marker in colon carcinoma. CD133+ cells are both necessary and sufficient to initiate tumour growth in animal models. The CD133+ cell population and spheroid cultures contain cells expressing the stem cell marker Musashi-1 which is involved in maintenance of stem cell fate in several tissues and importantly, this expression is maintained in stem-like cells…

Influences of TP53 and the anti-aging DDR1 receptor in controlling Raf/MEK/ERK and PI3K/Akt expression and chemotherapeutic drug sensitivity in prost…

2020

Background TP53 plays critical roles in sensitivity to chemotherapy, and aging. Collagen is very important in aging. The molecular structure and biochemical properties of collagen changes during aging. The discoidin domain receptor (DDR1) is regulated in part by collagen. Elucidating the links between TP53 and DDR1 in chemosensitivity and aging could improve therapies against cancer and aging. Results Restoration of WT-TP53 activity resulted in increased sensitivity to chemotherapeutic drugs and elevated expression of key components of the Raf/MEK/ERK, PI3K/Akt and DDR1 pathways. DDR1 could modulate the levels of Raf/MEK/ERK and PI3K/Akt pathways as well as sensitize the cells to chemothera…

Primordial odontogenic tumor: An immunohistochemical profile.

2017

Background Primordial Odontogenic Tumor (POT) is a recently described odontogenic tumor characterized by a variably cellular loose fibrous tissue with areas similar to the dental papilla, covered by cuboidal to columnar epithelium that resembles the internal epithelium of the enamel organ, surrounded at least partly by a delicate fibrous capsule. The purpose of this study was to investigate the possible histogenesis and biological behavior of this rare tumor by means of a wide immunohistochemical analysis of its epithelial and mesenchymal components. Material and Methods The immunoexpression of twenty-three different antibodies were evaluated in four cases of POT. Results The epithelial cel…

Evaluation of thermoresponsive properties and biocompatibility of polybenzofulvene aggregates for leuprolide delivery

2012

Abstract In this study, a polybenzofulvene derivative named poly-6-MOEG-9-BF3k, was evaluated as polymeric material for the production of injectable thermoresponsive nano-aggregates able to load low molecular weight peptidic drug, like the anticancer leuprolide. Thermoresponsive behavior of poly-6-MOEG-9-BF3k was studied in aqueous media by evaluating scattering intensity variations by means of DLS in function of temperature. Zeta potential measurements and SEM observations were also carried out. Moreover, critical aggregation temperature of the poly-6-MOEG-9-BF3k polymer was evaluated by pyrene fluorescence analysis. Then, the ability of prepared thermoresponsive aggregates to protect this…

Loss of histone macroH2A1 in hepatocellular carcinoma cells promotes paracrine-mediated chemoresistance and CD4

2019

Rationale: Loss of histone macroH2A1 induces appearance of cancer stem cells (CSCs)-like cells in hepatocellular carcinoma (HCC). How CSCs interact with the tumor microenvironment and the adaptive immune system is unclear. Methods: We screened aggressive human HCC for macroH2A1 and CD44 CSC marker expression. We also knocked down (KD) macroH2A1 in HCC cells, and performed integrated transcriptomic and secretomic analyses. Results: Human HCC showed low macroH2A1 and high CD44 expression compared to control tissues. MacroH2A1 KD CSC-like cells transferred paracrinally their chemoresistant properties to parental HCC cells. MacroH2A1 KD conditioned media transcriptionally reprogrammed parental …

Does P-glycoprotein-170 expression predict for chemoresistance in transitional cell carcinoma of the bladder?

2003

Introduction: The glycoprotein P-170, causing drug efflux from the cells, may represent at least one cause of resistance to most drugs used in intravesical chemotherapy of superficial bladder cancer. Materials and Methods: GP-170 was retrospectively assessed in 60 patients affected by superficial transitional cell tumours of the bladder. It was assessed by immunohistochemistry in a semiquantitative way by the intensity of staining and by the percentage of positive cells. Correlation of GP-170 expression with G-grade, T-category, multiplicity, recurrence rate and treatment was investigated. In 44 patients recurrence was analysed in relation to GP-170 basal expression and to its variations. T…

Temporal control of xyloglucan self-assembly into layered structures by radiation-induced degradation

2016

Partially degalactosylated xyloglucan from tamarind seeds (Deg-XG) is a very appealing biopolymer for the production of in situ gelling systems at physiological temperature. In this work, we observe that the morphology of hydrogels evolves towards high degrees of structural organization with time, yielding to dense stacks of thin membranes within 24 h of incubation at 37 °C. We also explore the possibility offered by gamma irradiation of controlling the time scale of this phenomenon, the final morphology and mechanical properties of the system. Structural and molecular modifications of Deg-XG with dose are investigated by FTIR, dynamic light scattering (DLS) and rotational viscosimetry. The…

The oral KIF11 inhibitor 4SC‐205 exhibits antitumor activity and potentiates standard and targeted therapies in primary and metastatic neuroblastoma …

2021

Inhibidor de KIF11; Terapias dirigidas; Metástasis Inhibidor de KIF11; Teràpies dirigides; Metàstasi KIF11 inhibitor; Targeted therapies; Metastasis In summary, our study provides a rationale for the future therapeutic integration in clinical trials of 4SC-205, an structurally distinct oral KIF11 inhibitor that shows potent antitumor activity in multiple preclinical neuroblastoma models and sensitizes neuroblastoma cells to standard chemotherapy and specific neuroblastoma-targeted therapies. The financial support for this research was provided by Instituto de Salud Calos III (PI20/00530 to Miguel F. Segura; PI20/01107 to Rosa Noguera; PI17/02248 and CPII18/00027 to Anna Santamaria; PI19/013…