Browsing by Author "Gonzalez, Hernan E."

Now showing 1 - 6 of 6
  • Thumbnail Image
    Item
    Altered Chemokine Receptor Expression in Papillary Thyroid Cancer
    (MARY ANN LIEBERT, INC, 2009) Gonzalez, Hernan E.; Leiva, Andrea; Tobar, Hugo; Boehmwald, Karen; Tapia, Grace; Torres, Javiera; Mosso, Lorena M.; Bueno, Susan M.; Gonzalez, Pablo; Kalergis, Alexis M.; Riedel, Claudia A.
    Background: Papillary thyroid cancer (PTC), the most prevalent type of differentiated thyroid carcinoma, displays a strikingly high frequency of lymph node metastasis (LNM). Recent data suggest that chemokines can play an important role in promoting tumor progression and metastatic migration of tumor cells. Here we have evaluated whether PTC tissues express a different pattern of chemokine receptors and if the expression of these receptors correlates with LNM.
  • Thumbnail Image
    Item
    Differential expression profile of CXCR3 splicing variants is associated with thyroid neoplasia. Potential role in papillary thyroid carcinoma oncogenesis?
    (2018) Urra, Soledad; Fischer, Martin C.; Martinez, Jose R.; Veliz, Loreto; Orellana, Paulina; Solar González, Antonieta Alejandra; Bohmwald Prieto, Karen; Kalergis Parra, Alexis Mikes; Riedel, Claudia; Corvalán R., Alejandro; Roa Strauch, Juan Carlos Enrique; Fuentealba, Rodrigo; Cáceres, C. Joaquín; López Lastra, Marcelo Andrés; León Ramírez, Augusto; Droppelmann, Nicolás; Gonzalez, Hernan E.
  • No Thumbnail Available
    Item
    Inflammatory conditions induce gap junctional communication between rat Kupffer cells both in vivo and in vitro
    (2007) Eugenin, Eliseo A.; Gonzalez, Hernan E.; Sanchez, Helmuth A.; Branes, Maria C.; Saez, Juan C.
    Connexin43 (Cx43), a gap junction protein subunit, has been previously detected in Kupffer cells (KCs) during liver inflammation, however, KCs phagocytose cell debris that may include Cx43 protein, which could explain the detection of Cx43 in KCs. We determined that KCs express Cx43 and form gap junctions (GJs) both in vivo and in vitro. In liver sections of animals treated with LPS, Cx43 was detected at ED2+ cells interfaces, indicating formation of GJs between KCs in vivo. In vitro, unstimulated KCs cultures did not form functional GJs, and expressed low levels of Cx43 that showed a diffuse intracellular distribution. In contrast, KCs treated with LPS plus IFN-gamma, expressed a greater amount of Cx43 at both, protein and mRNA levels, and showed Cx43 at cell-cell contacts associated with higher dye coupling. In conclusion, activation of KCs in vivo or in vitro resulted in enhanced Cx43 expression levels and formation of GJ that might play relevant roles during liver inflammation. (c) 2007 Elsevier Inc. All rights reserved.
  • Thumbnail Image
    Item
    Radioactive Iodine Administration Is Associated with Persistent Related Symptoms in Patients with Differentiated Thyroid Cancer
    (2016) Florenzano Valdés, Pablo Felipe; Guarda Vega, Francisco; Jaimovich, Rodrigo; Droppelmann, Nicolás; Gonzalez, Hernan E.; Domínguez Ruiz-Tagle, José Miguel
  • Thumbnail Image
    Item
    Study and management of thyroid nodes by non specialist physicians: SOCHED consensus
    (SOC MEDICA SANTIAGO, 2017) Tala, Hernan; Diaz, Rene E.; Dominguez Ruiz Tagle, Jose Miguel; Sapunar Zenteno, Jorge; Pineda, Pedro; Arroyo Albala, Patricia; Barberan, Marcela; Cabane, Patricio; Cruz Olivos, Francisco; Patricio Gac, E.; Glasinovic Pizarro, Andrea; Gonzalez, Hernan E.; Grob, Francisca; Hidalgo Valle, Maria Soledad; Jaimovich, Rodrigo; Lanas, Alejandra; Liberman, Claudio; Lobo Guinez, Maite; Madrid, Arturo; Moreno Seguel, Marcela; Mosso, Lorena; Fernando Munizaga, C.; Ortiz Parada, Eugenia; Osorio Gonnet, Fernando; Slater Morales, Jeannie; Solar, Antonieta; Stehr, Carlos; Vasquez Rodriguez, Felix; Veliz, Jesus; Villaseca Najarian, Roberto; Wohllk, Nelson
    The thyroid nodule is a frequent cause of primary care consultation. The prevalence of a palpable thyroid nodule is approximately 4-7%, increasing up to 67% by the incidental detection of nodules on ultrasound. The vast majority are benign and asymptomatic, staying stable over time. The clinical importance of studying a thyroid nodule is to exclude thyroid cancer, which occurs in 5 to 10% of the nodules. The Board of SOCHED (Chilean Society of Endocrinology and Diabetes) asked the Thyroid Study Group to develop a consensus regarding the diagnostic management of the thyroid nodule in Chile, aimed at non-specialist physicians and adapted to the national reality. To this end, a multidisciplinary group of 31 experts was established among university academics, active researchers with publications on the subject and prominent members of scientific societies of endocrinology, head and neck surgery, pathology and radiology. A total of 14 questions were developed with key aspects for the diagnosis and subsequent referral of patients with thyroid nodules, which were addressed by the participants. In those areas where the evidence was insufficient or the national reality had to be considered, the consensus opinion of the experts was used through the Delphi methodology. The consensus was approved by the SOCHED board for publication.
  • No Thumbnail Available
    Item
    The Combination of RET, BRAF and Demographic Data Identifies Subsets of Patients with Aggressive Papillary Thyroid Cancer
    (2019) Martinez, Jose R. W.; Vargas-Salas, Sergio; Urra Gamboa, Soledad; Munoz, Estefania; Miguel Dominguez, Jose; Leon, Augusto; Droppelmann, Nicolas; Solar, Antonieta; Zafereo, Mark; Holsinger, F. Christopher; Gonzalez, Hernan E.
    The use of BRAFV600E and RET/PTC1 as biomarkers to guide the extent of surgery in patients with papillary thyroid cancer (PTC) remains controversial. We assessed the combined use of demographic data (sex and age) with mRNA expression levels and/or mutational status (BRAFV600E and RET/PTC1) to identify potential subsets of patients with aggressive histopathological features (lymph node metastases and extrathyroidal extension). In a cohort of 126 consecutive patients, BRAFV600E and RET/PTC1 mutations were found in 52 and 18%, respectively. By conditional bivariate analysis (CBVA), a high activity' profile of BRAF (BRAFV600E positive or high expression) and low activity' profile of RET (RET/PTC1 negative or low expression) was associated with extrathyroidal extension (ETE) (OR 4.48). Alternatively, a high activity' profile of RET (RET/PTC1 positive or high expression) and low activity' profile of BRAF (BRAFV600E negative or low expression) were associated with lymph node metastasis (LNM) (OR 12.80). Furthermore, in patients younger than 55years, a low expression of BRAF was associated with LNM (OR 17.65) and the presence of BRAFV600E mutation was associated with ETE (OR 2.76). Our results suggest that the analysis of demographic and molecular variables by CBVA could contribute to identify subsets of patients with aggressive histopathologic features, providing a potential guide to personalised surgical management of PTC.