Browsing by Author "Mosso, Lorena"

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    11 beta-hydroxysteroid dehydrogenase type-2 and type-1 (11 beta-HSD2 and 11 beta-HSD1) and 5 beta-reductase activities in the pathogenia of essential hypertension
    (HUMANA PRESS INC, 2010) Campino, Carmen; Carvajal, Cristian A.; Cornejo, Javiera; San Martin, Betty; Olivieri, Oliviero; Guidi, Giancesare; Faccini, Giovanni; Pasini, Francesco; Sateler, Javiera; Baudrand, Rene; Mosso, Lorena; Owen, Gareth I.; Kalergis, Alexis M.; Padilla, Oslando; Fardella, Carlos E.
    Cortisol availability is modulated by several enzymes: 11 beta-HSD2, which transforms cortisol (F) to cortisone (E) and 11 beta-HSD1 which predominantly converts inactive E to active F. Additionally, the A-ring reductases (5 alpha- and 5 beta-reductase) inactivate cortisol (together with 3 alpha-HSD) to tetrahydrometabolites: 5 alpha THF, 5 beta THF, and THE. The aim was to assess 11 beta-HSD2, 11 beta-HSD1, and 5 beta-reductase activity in hypertensive patients. Free urinary F, E, THF, and THE were measured by HPLC-MS/MS in 102 essential hypertensive patients and 18 normotensive controls. 11 beta-HSD2 enzyme activity was estimated by the F/E ratio, the activity of 11 beta-HSD1 in compare to 11 beta-HSD2 was inferred by the (5 alpha THF + 5 beta THF)/THE ratio and 5 beta-reductase activity assessed using the E/THE ratio. Activity was considered altered when respective ratios exceeded the maximum value observed in the normotensive controls. A 15.7% of patients presented high F/E ratio suggesting a deficit of 11 beta-HSD2 activity. Of the remaining 86 hypertensive patients, two possessed high (5 alpha THF + 5 beta THF)/THE ratios and 12.8% had high E/THE ratios. We observed a high percentage of alterations in cortisol metabolism at pre-receptor level in hypertensive patients, previously misclassified as essential. 11 beta-HSD2 and 5 beta-reductase decreased activity and imbalance of 11 beta-HSDs should be considered in the future management of hypertensive patients.
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    An Ultrasound Model to Discriminate the Risk of Thyroid Carcinoma
    (ELSEVIER SCIENCE INC, 2011) Miguel Dominguez, Jose; Baudrand, Rene; Cerda, Jaime; Campusano, Claudia; Fardella, Carlos; Arteaga, Eugenio; Cruz, Francisco; Solar, Antonieta; Arias, Tatiana; Mosso, Lorena
    Rationale and Objectives: Thyroid nodules are common on ultrasonographic examination and are mostly benign. Ultrasound characteristics may help discriminate thyroid carcinoma (TC) from benign nodules. The aims of this study. were to identify ultrasonographic characteristics associated with IC and to validate a previously proposed model based on the presence of three ultrasonographic characteristics.,
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    Comparison of confirmatory tests for the diagnosis of primary aldosteronism
    (ENDOCRINE SOC, 2006) Mulatero, Paolo; Milan, Alberto; Fallo, Francesco; Regolisti, Giuseppe; Pizzolo, Francesca; Fardella, Carlos; Mosso, Lorena; Marafetti, Lisa; Veglio, Franco; Maccario, Mauro
    Context: Primary aldosteronism (PA) is the most frequent form of secondary hypertension, accounting for up to 5-10% of all hypertensive patients, and the diagnosis of PA can present an important challenge for the clinician. After a positive screening test, the diagnosis is confirmed by a suppression test, often an iv saline load test (SLT) or a fludrocortisone suppression test (FST). The FST is considered by many to be the most reliable but is more complex and expensive.
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    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.
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    Urinary free cortisol is not a biochemical marker of hypertension
    (OXFORD UNIV PRESS, 2007) Krall, Paola; Carvajal, Cristian; Ortiz, Eugenia; Munoz, Carlos; Garrido, Lose Luis; Mosso, Lorena; Fardella, Carlos
    Background: Increasing evidence suggests that glucocorticoids might play a role in blood pressure (BP) control. These reports show that cortisol (F) can increase the BP acting on the mineralocorticoid receptor in kidney, brain, heart, and blood vessel. The aim of this study was to evaluate the effects of F in the renal salt and water reabsorption in essential hypertensive patients (EH).