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1.
Actas Dermosifiliogr (Engl Ed) ; 110(8): 666-672, 2019 Oct.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-31208672

RESUMO

INTRODUCTION: Foot eczema is a common complaint encountered by skin allergists. OBJECTIVE: To study a series of patients with foot eczema who underwent patch testing and describe their demographic profile, diagnoses, and the main allergens involved. MATERIAL AND METHODS: Cross-sectional observational study of all patients tested with the standard Spanish patch test series at a dermatology department over a period of 13 years (2004-2016). We studied patch test results and definitive diagnoses by comparing different subgroups of patients with foot eczema. RESULTS: Of the 3,265 patients included in the study, 308 (9.4%) had foot eczema, 176 (57.9%) had foot eczema only and 132 (42.1%) had concomitant foot and hand eczema. Positive patch test results were more common in patients with foot eczema only (positivity rate of 61.5% vs. 53.4% for foot and hand eczema). In the subgroup of patients with concomitant foot and hand involvement, patients aged under 18 years had a lower rate of positive results (51.3% vs. 64.6% for patients >18 years). Potassium dichromate was the most common allergen with current relevance in all subgroups. The main diagnosis in patients with foot involvement only was allergic contact dermatitis (49.1%). In the subgroup of patients with concomitant hand and foot eczema, the main diagnoses were psoriasis in adults (33.6%) and atopic dermatitis in patients aged under 18 years (60.0%). CONCLUSION: Patch tests are a very useful diagnostic tool for patients with foot eczema with or without concomitant hand involvement.


Assuntos
Dermatite Alérgica de Contato/diagnóstico , Eczema/diagnóstico , Doenças do Pé/diagnóstico , Testes do Emplastro , Psoríase/diagnóstico , Adolescente , Adulto , Fatores Etários , Alérgenos/efeitos adversos , Alérgenos/análise , Corantes/efeitos adversos , Estudos Transversais , Dermatite Alérgica de Contato/epidemiologia , Dermatite Alérgica de Contato/etiologia , Eczema/induzido quimicamente , Eczema/epidemiologia , Feminino , Doenças do Pé/induzido quimicamente , Doenças do Pé/epidemiologia , Dermatoses da Mão/diagnóstico , Dermatoses da Mão/epidemiologia , Humanos , Masculino , Testes do Emplastro/métodos , Dicromato de Potássio/efeitos adversos , Psoríase/epidemiologia , Estudos Retrospectivos , Fatores de Tempo , Adulto Jovem
2.
Clin Transl Oncol ; 19(1): 12-20, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27048161

RESUMO

Anaplastic thyroid cancer (ATC) is the most aggressive solid tumor and almost uniformly lethal in humans. The Boards of the Thyroid Cancer Group of the Spanish Society of Endocrinology and Nutrition and the Grupo Español de Enfermedades Huérfanas e Infrecuentes of the Spanish Society of Oncology requested that an independent task force draft a more comprehensive consensus statement regarding ATC. All relevant literature was reviewed, including serial PubMed searches together with additional articles. This is the first, comprehensive Spanish consensus statement for ATC and includes the characteristics, diagnosis, initial evaluation, treatment goals, recommendations and modalities for locoregional and advanced disease, palliative care options, surveillance, and long-term monitoring. Newer systemic therapies are being investigated, but more effective combinations are needed to improve patient outcomes. Though more aggressive radiotherapy has reduced locoregional recurrences, median overall survival has not improved in more than 50 years.


Assuntos
Carcinoma Anaplásico da Tireoide/terapia , Neoplasias da Glândula Tireoide/terapia , Algoritmos , Terapia Combinada , Consenso , Humanos , Espanha
3.
Clin Transl Oncol ; 19(3): 279-287, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27704399

RESUMO

Thyroid cancer is the single most prevalent endocrine malignancy; differentiated thyroid cancer (DTC) accounts for more than 90 % of all malignancies and its incidence has been rising steadily. For more patients, surgical treatment, radioactive iodine (RAI) ablation, and thyroid-stimulating hormone (TSH) suppressive therapy achieve an overall survival (OS) rate of 97.7 % at 5 years. Nevertheless, locoregional recurrence occurs in up to 20 % and distant metastases in approximately 10 % at 10 years. Two-thirds of these patients will never be cured with radioactive iodine therapy and will become RAI-refractory, with a 3-year OS rate of less than 50 %. Over the last decade, substantial progress has been made in the management of RAI-refractory DTC. Given the controversy in some areas, the Spanish Task Force for Thyroid Cancer on behalf of Spanish Society of Endocrinology Thyroid Cancer Working Group (GTSEEN) and the Spanish Rare Cancer Working Group (GETHI) have created a national joint task force to reach a consensus addressing the most challenging aspects of management in these patients. In this way, multidisciplinary management should be mandatory and nuclear medicine targeted therapy, novel molecular targeted agents, and combinations are currently changing the natural history of RAI-refractory DTC.


Assuntos
Diferenciação Celular/efeitos dos fármacos , Radioisótopos do Iodo , Guias de Prática Clínica como Assunto/normas , Inibidores de Proteínas Quinases/uso terapêutico , Tolerância a Radiação/efeitos dos fármacos , Neoplasias da Glândula Tireoide/tratamento farmacológico , Diferenciação Celular/efeitos da radiação , Consenso , Gerenciamento Clínico , Humanos , Terapia de Alvo Molecular
4.
Clin Transl Oncol ; 18(8): 769-75, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26687366

RESUMO

BACKGROUND: Of all thyroid cancers, <5 % are medullary (MTC). It is a well-characterized neuroendocrine tumor arising from calcitonin-secreting C cells, and RET gene plays a central role on its pathogeny. METHODS: The electronic search was conducted using MEDLINE (PubMed), EMBASE and Cochrane Central Register of Controlled Trials. Quality assessments of selected current articles, guidelines and reviews of MTC were performed. RESULTS: This consensus updates and summarizes biology, treatment and prognostic considerations of MTC. CONCLUSIONS: Multidisciplinary teams and specialized centers are recommended for the management of MTC patients. In the metastatic setting, those patients with large volume of disease are candidates to start systemic treatment mainly if they are symptomatic and the tumor has progressed in the last 12-14 months. Wait and see strategy should be offered to patients with: disseminated disease with only high levels of calcitonin and no macroscopic structural disease, low burden and absence of progression.


Assuntos
Carcinoma Neuroendócrino/patologia , Carcinoma Neuroendócrino/terapia , Neoplasias da Glândula Tireoide/patologia , Neoplasias da Glândula Tireoide/terapia , Humanos
5.
Endocrinol. nutr ; 62(5)May 2015.
Artigo em Espanhol | BIGG - guias GRADE | ID: biblio-965501

RESUMO

Objetivo: Actualizar las recomendaciones previas formuladas por el Grupo de trabajo de osteoporosis y metabolismo mineral de la Sociedad Española de Endocrinología y Nutrición (SEEN) para la evaluación y el tratamiento de la osteoporosis asociada a diferentes enfermedades endocrinas y alteraciones nutricionales. Participantes: Miembros del Grupo de trabajo de osteoporosis y metabolismo mineral de la SEEN. Métodos: Las recomendaciones se formularon de acuerdo al sistema Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) para establecer tanto la fuerza de las recomendaciones como el grado de evidencia. Se realizó una búsqueda sistemática en PubMed de las nuevas acerca de cada enfermedad usando las siguientes palabras clave asociadas al nombre de cada proceso patológico: AND osteoporosis, fractures, bone mineral density, bone markers y treatment. Se revisaron artículos escritos en inglés con fechas de inclusión comprendidas entre el 18 de octubre de 2011 y el 30 de octubre de 2014. Tras la formulación de las recomendaciones estas se discutieron de forma conjunta por el Grupo de trabajo.Conclusiones: Esta actualización resume los nuevos datos acerca de la evaluación y tratamiento de la osteoporosis en las enfermedades endocrinas y nutricionales que se asocian a baja masa ósea o a un aumento del riesgo de fractura.(AU)


Objective: To update previous recommendations developed by the Working Group on Osteoporosis and Mineral Metabolism of the Spanish Society of Endocrinology and Nutrition for the evaluation and treatment of osteoporosis associated to different endocrine and nutritional diseases. Participants: Members of the Working Group on Osteoporosis and Mineral Metabolism of the Spanish Society of Endocrinology and Nutrition. Methods: Recommendations were formulated according to the GRADE system (Grading of Recommendations, Assessment, Development, and Evaluation) to describe both the strength of recommendations and the quality of evidence. A systematic search was made in MEDLINE (Pubmed) using the following terms associated to the name of each condition: AND "osteoporosis", "fractures", "bone mineral density", and "treatment". Papers in English with publication date between 18 October 2011 and 30 October 2014 were included. The recommendations were discussed and approved by all members of the Working Group. Conclusions: This update summarizes the new data regarding evaluation and treatment of osteoporosis associated to endocrine and nutritional conditions.(AU)


Assuntos
Humanos , Osteoporose/tratamento farmacológico , Vitamina D/uso terapêutico , Densidade Óssea , Doenças do Sistema Endócrino/tratamento farmacológico , Fraturas Ósseas/etiologia , Minerais/uso terapêutico
6.
Comput Intell Neurosci ; 2012: 412512, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23097663

RESUMO

This short survey the reviews recent literature on brain connectivity studies. It encompasses all forms of static and dynamic connectivity whether anatomical, functional, or effective. The last decade has seen an ever increasing number of studies devoted to deduce functional or effective connectivity, mostly from functional neuroimaging experiments. Resting state conditions have become a dominant experimental paradigm, and a number of resting state networks, among them the prominent default mode network, have been identified. Graphical models represent a convenient vehicle to formalize experimental findings and to closely and quantitatively characterize the various networks identified. Underlying these abstract concepts are anatomical networks, the so-called connectome, which can be investigated by functional imaging techniques as well. Future studies have to bridge the gap between anatomical neuronal connections and related functional or effective connectivities.


Assuntos
Encéfalo/fisiologia , Conectoma , Rede Nervosa/fisiologia , Conectoma/métodos , Humanos , Processamento de Imagem Assistida por Computador/métodos , Modelos Neurológicos , Descanso/fisiologia
8.
J Dairy Sci ; 94(1): 138-45, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21183025

RESUMO

Bovine mastitis is one of the most economically deleterious diseases affecting dairy herds and results from an infection of the udder by pathogenic microorganisms such as Staphylococcus aureus, Streptococcus uberis, and Escherichia coli. The mammary gland is capable of preventing and combating bacterial infection by means of a complex network of innate and adaptive immune mechanisms. Lactoferrin is an 86-kDa protein with antibacterial activity that plays a role in the mammary gland's defense against infection. ß-Lactoglobulin (ß-LG) is an 18-kDa protein that is present in most mammals but is notably absent in humans, rodents, and lagomorphs. Different genetic variants of this protein exist, with ß-LG A and ß-LG B being the most common. In spite of being well studied, the biological function of ß-LG is not thoroughly understood, and most noticeably, no reports exist on the effects of the native protein on bacterial growth. Hence, the objective of this study was to assess the potential antibacterial activity of ß-LG against mastitis agents. To do this, we purified ß-LG from normal bovine milk using a mild, nondenaturing method and performed in vitro growth inhibition assays with Staph. aureus, E. coli, and Strep. uberis. ß-Lactoglobulin inhibited the growth of Staph. aureus and Strep. uberis but had no effect on E. coli. The antimicrobial activity against Staph. aureus and Strep. uberis was concentration dependent and was elicited by the intact protein because Tricine-sodium dodecyl sulfate-PAGE and analytical gel filtration chromatography did not reveal the presence of short degradation peptides. Analysis of the genetic variants of ß-LG showed that ß-LG A has higher inhibitory activity against Staph. aureus and Strep. uberis than ß-LG B. Coincubation of ß-LG and lactoferrin resulted in an augmented antibacterial activity against Staph. aureus, suggesting an additive effect of the proteins. This result, along with the proteins' complementary spectrum of action, suggests that ß-LG and lactoferrin may complement each other in the mammary gland's defenses against bacterial infection.


Assuntos
Anti-Infecciosos/farmacologia , Lactoglobulinas/farmacologia , Mastite Bovina/prevenção & controle , Animais , Bovinos , Contagem de Colônia Microbiana/veterinária , Escherichia coli/efeitos dos fármacos , Escherichia coli/crescimento & desenvolvimento , Feminino , Lactoglobulinas/genética , Mastite Bovina/microbiologia , Staphylococcus aureus/efeitos dos fármacos , Staphylococcus aureus/crescimento & desenvolvimento , Streptococcus/classificação , Streptococcus/efeitos dos fármacos , Streptococcus/crescimento & desenvolvimento
9.
Artigo em Inglês | MEDLINE | ID: mdl-19163756

RESUMO

Glaucoma represent one of the most frequent causes of partial loss of the visual field. It comes along with an ongoing destruction of the optic nerve caused by an increased pressure of the eye liquid. The disease becomes obvious from investigations of the retina with scanning laser microscopes. In this report an image analysis and classification system based on independent component analysis and k-nearest-neighbor classification is proposed. The method is tested with 120 selected retina images collected with the Heidelberg Retina Tomograph and achieves a classification rate of 91%.


Assuntos
Glaucoma/classificação , Glaucoma/diagnóstico , Processamento de Imagem Assistida por Computador/métodos , Microscopia/métodos , Retina/patologia , Algoritmos , Bases de Dados Factuais , Humanos , Lasers , Sistema de Registros , Reprodutibilidade dos Testes , Tomografia
10.
Biol Reprod ; 70(6): 1814-21, 2004 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-14960491

RESUMO

Retinoic acid (RA) was recently shown to modify testosterone secretion of the fetal testis in vitro. We characterized this effect by culturing rat testes explanted at various ages, from Fetal Day 14.5 to Postnatal Day 3. In basal medium, RA inhibited, in a dose-dependent manner, both basal and acute LH-stimulated testosterone secretion by testes explanted on Fetal Days 14.5, 15.5, and 16.5. It had no effect on testes from older animals. The negative effect of RA did not result from a diminution in the number of Leydig cells but from a decrease in P450c17 mRNA levels and in LH-stimulated cAMP production. However, the RA-induced decrease in P450C17 mRNA levels was also observed with neonatal testes, suggesting that this enzymatic step is no longer rate limiting at this developmental stage. To study the physiological relevance of RA effects, we used fetuses and neonates issued from mothers fed a vitamin A-deficient (VAD) diet, resulting in a threefold decrease of plasma retinol concentration. On Fetal Day 18.5 and on Posnatal Day 3, testosterone secretion by the testis ex vivo was significantly increased in VAD animals. This shows that the endogenous retinol inhibits differentiation and/or function of fetal Leydig cells before Fetal Day 18.5 and is required for the normal regression of fetal Leydig cell function that occurs after Fetal Day 18.5. In conclusion, our results show that retinoids play a negative role on the steroidogenic activity during the differentiation of rat fetal Leydig cells.


Assuntos
Testículo/efeitos dos fármacos , Testículo/metabolismo , Testosterona/biossíntese , Tretinoína/farmacologia , Animais , Animais Recém-Nascidos , Sequência de Bases , Diferenciação Celular/efeitos dos fármacos , DNA/genética , Feminino , Feto/efeitos dos fármacos , Feto/metabolismo , Idade Gestacional , Células Intersticiais do Testículo/citologia , Células Intersticiais do Testículo/efeitos dos fármacos , Células Intersticiais do Testículo/metabolismo , Hormônio Luteinizante/farmacologia , Masculino , Técnicas de Cultura de Órgãos , Gravidez , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Ratos , Ratos Sprague-Dawley , Esteroide 17-alfa-Hidroxilase/genética , Testículo/citologia , Deficiência de Vitamina A/metabolismo
11.
Nutr Hosp ; 19(6): 362-6, 2004.
Artigo em Espanhol | MEDLINE | ID: mdl-15672652

RESUMO

AIM: To determine the incidence of hypophosphatemia in parenterally fed patients, the phosphate amount necessary to prevent this complication and associated risks factors. SETTING: Observational study, not controlled, in a third level hospital. PATIENTS: In-patients with parenteral nutrition with at least a complete laboratory work-up. INTERVENTION: For a complete year, days on parenteral nutrition, administered phosphate and plasmatic ionised calcium levels, y-glutamiltranspeptidase, glucose, phosphate, pre-albumin, urea, and leukocytes were recorded. A multiple stepwise regression analysis and logistic regression are used for data analysis. RESULTS: Eight hundred and twenty seven determinations, corresponding to 401 patients, were included. Significant variables (p < 0.05) were: administered phosphate and ionised calcium serum levels, glucose, pre-albumin, and urea; regression coefficients were 0.004 (95%CI: 0.002 to 0.006), -0.156 (95%CI: -0.270 to 0.037), -0.014 (95%IC: -0.022 to 0.009), 0.005 (95%CI: 0.002 to 0.009) and 0.019 (95%CI: 0.016 to 0.022), respectively; the constant was 1.0735 (95%CI: 0.939 to 1.2079). The risk for developing hypophosphatemia decreased from 0.65 (95%CI: 0.33 to 1.26) to 0.16 (95%CI: 0.078 to 0.35) when administered phosphate varied from the span 7.5-17.5 mmol to values higher than 27.5 mmol. CONCLUSIONS: It is necessary to routinely supplement nutrition with phosphate since its content in commercially available lipidic emulsions is not sufficient to prevent hypophosphatemia in the majority of patients with parenteral nutrition. Phosphate intake must be sufficient to restore the intracellular phosphate deficit and to compensate for the plasmatic phosphate fall, with special attention to poorly nourished, hyperglycaemic or with renal failure patients. Phosphate intakes around 27-37 mmol dramatically decrease the incidence of hypophosphatemia in studied patients, with no recorded cases of severe hypophosphatemia.


Assuntos
Hipofosfatemia/etiologia , Hipofosfatemia/prevenção & controle , Nutrição Parenteral/efeitos adversos , Análise Química do Sangue , Fosfatos de Cálcio/administração & dosagem , Feminino , Humanos , Hipofosfatemia/sangue , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco
14.
Mol Cell Endocrinol ; 172(1-2): 147-55, 2001 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-11165048

RESUMO

Recently it was shown that the cholinergic agonist carbachol stimulates cortisol production in bovine ZFR cells via muscarinic receptor M(3). In the present study, we investigated the effect of chronic cholinergic stimulation on steroidogenic response and muscarinic receptor regulation in ZFR cells. Cortisol secretion of ZFR cells treated with 10(-4) M of carbachol decreased in a dose- and time-dependent manner. The carbachol-elicited loss of response was associated with a decrease in M(3) receptor number, which was also time- and dose-dependent. The down-regulation of the receptors was not associated with the decrease of M(3) receptor mRNA level. The marked steroidogenic desensitization caused by pretreatment of carbachol did not alter ACTH or angiotensin II activated steroid response. Northern blot analysis showed that carbachol pretreatment did not change the gene expression of P450scc, P450cl7, 3betaHSD and StAR mRNAs. These results suggest that carbachol induces homologous steroidogenic refractoriness of ZFR cells.


Assuntos
Carbacol/farmacologia , Zona Fasciculada/efeitos dos fármacos , Zona Reticular/efeitos dos fármacos , Hormônio Adrenocorticotrópico/farmacologia , Angiotensina II/farmacologia , Animais , Bovinos , Células Cultivadas , Relação Dose-Resposta a Droga , Regulação para Baixo , Hidrocortisona/biossíntese , RNA Mensageiro/efeitos dos fármacos , RNA Mensageiro/metabolismo , Receptores Muscarínicos/efeitos dos fármacos , Receptores Muscarínicos/genética , Sistemas do Segundo Mensageiro/efeitos dos fármacos , Esteroides/biossíntese , Zona Fasciculada/citologia , Zona Reticular/citologia
15.
Med Clin (Barc) ; 115(12): 451-4, 2000 Oct 14.
Artigo em Espanhol | MEDLINE | ID: mdl-11093855

RESUMO

BACKGROUND: The aim of the present study was to assess the anthropometric variables and the reference values of body composition in the adult population of L'Hospitalet de Llobregat, due to the lack of epidemiological studies on this matter in Spain. PATIENTS AND METHODS: We studied 234 normal subjects, 134 males, mean age 41.4 years, and 134 females, mean age 40.7 years, selected from the census of L'Hospitalet de Llobregat and representative of its population in sex and age. We determined anthropometric characteristics, body weight, height, body mass index, waist-hip ratio and body composition parameters: total body water, free fat mass, fat mass and body fat by bioelectrical impedance analyzer. RESULTS: Twenty-four males and 33 females were obese, and out of them 2 males and 4 women presented morbid obesity. The body mass index was higher either in males (p = 0.017) or in females (p = 0. 0001) in the last decades in relation to first decade, and in women was as consequence of higher fat mass (p = 0.0001). The waist-hip ratio was 0.93 (0.08) in male and 0.79 (0.07) in female, and it was high in males in the last decades. CONCLUSION: The present study points out the high prevalence of obesity in our city and the anthropometric characteristics and reference values of body composition in the normal population of L'Hospitalet de Llobregat, remarking the high body mass index in the last decades, especially in women due to an increase of fat mass. The waist-hip ratio was high in males in the last decades.


Assuntos
Composição Corporal , População Urbana , Adolescente , Adulto , Idoso , Antropometria , Impedância Elétrica , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Obesidade/epidemiologia , Distribuição Aleatória , Valores de Referência , Caracteres Sexuais , Espanha/epidemiologia , População Urbana/estatística & dados numéricos
16.
Endocrinology ; 141(7): 2392-400, 2000 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-10875239

RESUMO

Studies in Nur77-deficient mice have shown that the basal regulation of hypothalamic and pituitary functions as well as the adrenocortical steroidogenesis in these animals is normal. This indicates that Nur77-related orphan receptors may substitute Nur77 functions in the hypothalamo-pituitary-adrenal axis by a compensatory mechanism. Nor1 is the most recently cloned member of the NGFI-B/Nur77 subfamily, and its properties are still largely unknown. We demonstrate here that Nor1 is expressed in the pituitary gland and adrenal cortex, and that ACTH and angiotensin II (AngII) treatment of adrenal fasciculata cells induces Nor1 expression. Time-course analysis with both hormones on steroidogenic capacity and the specific gene expression in adrenal cells strongly suggest that Nor1 is an intermediate in the long-term consequences of ACTH or AngII treatment. The Nor1 and NGFI-B/Nur77 amino acid sequence homology and the analysis of the trans-activation properties of Nor1 show that the overall structural and functional organization of the two proteins is similar. As observed with NGFI-B/Nur77, Nor1 activates the expression of genes encoding steroidogenic enzymes as P450c21, through its interaction with NGFI-B response element promoter sequences. In contrast, binding experiments of Nor1 with the palindromic NurRE sequence suggest that Nor1 is not an efficient substitute for the NGFI-B/Nur77 activation of the POMC gene expression in pituitary glands. All these results indicate that Nor1 and NGFI-B/Nur77 may play similar albeit distinct roles in the hypothalamo-pituitary-adrenal axis. Further experiments also show that the mechanisms responsible for the transcriptional regulation of Nor1 in adrenal cells appear to depend on the protein kinase A and protein kinase C cascades.


Assuntos
Núcleo Celular/metabolismo , Proteínas de Ligação a DNA/fisiologia , Sistema Hipotálamo-Hipofisário/fisiologia , Proteínas do Tecido Nervoso , Proteínas Nucleares/fisiologia , Sistema Hipófise-Suprarrenal/fisiologia , Fatores de Transcrição/fisiologia , Córtex Suprarrenal/metabolismo , Glândulas Suprarrenais/citologia , Glândulas Suprarrenais/metabolismo , Hormônio Adrenocorticotrópico/farmacologia , Angiotensina II/farmacologia , Animais , Células COS , Sistema Enzimático do Citocromo P-450/genética , Proteínas de Ligação a DNA/química , Proteínas de Ligação a DNA/genética , Proteínas de Ligação a DNA/metabolismo , Expressão Gênica/fisiologia , Genes Reporter/fisiologia , Proteínas Nucleares/química , Proteínas Nucleares/genética , Proteínas Nucleares/metabolismo , Membro 1 do Grupo A da Subfamília 4 de Receptores Nucleares , Hipófise/metabolismo , Pró-Opiomelanocortina/genética , Regiões Promotoras Genéticas/fisiologia , RNA Mensageiro/metabolismo , Receptores Citoplasmáticos e Nucleares , Receptores de Esteroides , Receptores dos Hormônios Tireóideos , Sistemas do Segundo Mensageiro/fisiologia , Esteroide 21-Hidroxilase , Ativação Transcricional/fisiologia
17.
Endocrinology ; 141(5): 1599-607, 2000 May.
Artigo em Inglês | MEDLINE | ID: mdl-10803567

RESUMO

The purpose of this study was to evaluate the time-course effect of a 36-h treatment with ACTH (10(-8) M), transforming growth factor-beta1 (TGFbeta1; 10(-10) M), angiotensin II (AngII; 10 (-7) M), and insulin-like growth factor I (IGF-I; 10(-8) M) on the steroidogenic capacity of bovine adrenocortical cells (BAC) and on messenger RNA (mRNA) levels of ACTH receptor, cytochrome P450c17, 3beta-hydroxysteroid dehydrogenase (3betaHSD), steroidogenic acute regulatory protein (StAR), and StAR protein. ACTH and IGF-I enhanced, in a time-dependent manner, the acute 2-h ACTH-induced cortisol production, whereas TGFbeta 1 and AngII markedly reduced it. ACTH, IGF-I, and AngII increased ACTH receptor mRNA, but the opposite was observed after TGFbeta1 treatment. ACTH and IGF-I increased P450c17 and 3betaHSD mRNAs, whereas AngII and TGFbeta1 had the opposite effects. However, the effects of the four peptides on ACTH-induced cortisol production appeared before any significant alterations of the mRNA levels occurred. The most marked and rapid effect of the four peptides was on StAR mRNA. The stimulatory effect of ACTH was seen within 1.5 h, peaked at 4-6 h, and declined thereafter, but at the end of the 36-h pretreatment, the levels of StAR mRNA and protein were higher than those in control cells. IGF-I also enhanced StAR mRNA levels within 1.5 h, and these levels remained fairly constant. The effects of AngII on StAR mRNA expression were biphasic, with a peak within 1.5-3 h, followed by a rapid decline to almost undetectable levels of both mRNA and protein. TGFbeta1 had no significant effect during the first 3 h, but thereafter StAR mRNA declined, and at the end of the experiment the StAR mRNA and protein were almost undetectable. Similar results were observed when cells were treated with ACTH plus TGFbeta1. A 2-h acute ACTH stimulation at the end of the 36-h pretreatment caused a higher increase in StAR mRNA and protein in ACTH- or IGF-I-pretreated cells than in control cells, which, in turn, had higher levels than cells pretreated with TGFbeta1, ACTH plus TGFbeta1, or AngII. These results and the fact that the stimulatory (IGF-I) or inhibitory (AngII and TGFbeta1) effects on ACTH-induced cortisol production were more pronounced than those on the ability of cells to transform pregnenolone into cortisol strongly suggest that regulation of StAR expression is one of the main factors, but not the only one, involved in the positive (IGF-I) or negative (TGFbeta1 and AngII) regulation of BAC for ACTH steroidogenic responsiveness. A high correlation between steady state mRNA level and acute ACTH-induced cortisol production favors this conclusion.


Assuntos
3-Hidroxiesteroide Desidrogenases/biossíntese , Córtex Suprarrenal/metabolismo , Hormônio Adrenocorticotrópico/fisiologia , Angiotensina II/fisiologia , Fator de Crescimento Insulin-Like I/fisiologia , Fosfoproteínas/biossíntese , Receptores da Corticotropina/biossíntese , Esteroide 17-alfa-Hidroxilase/biossíntese , Fator de Crescimento Transformador beta/fisiologia , 3-Hidroxiesteroide Desidrogenases/genética , Animais , Bovinos , Células Cultivadas , Eletroforese em Gel de Poliacrilamida , Fosfoproteínas/genética , RNA Mensageiro/metabolismo , Receptores da Corticotropina/genética , Esteroide 17-alfa-Hidroxilase/genética , Fatores de Tempo
18.
Rev. Asoc. Esp. Espec. Med. Trab ; 9(1): 19-24, feb. 2000. tab, ilus
Artigo em Es | IBECS | ID: ibc-23292

RESUMO

El análisis de las referencias bibliográficas en distintas publicaciones es uno de los pilares en el estudio de la comunicación científica. Hemos analizado las pautas que rigen el consumo de información en los artículos de la revista Rehabilitación (Mdr). El estudio abarcó las 8.725 referencias bibliográficas en los artículos publicados en la revista entre 1990 y 1995. Las referencias recogidas corresponden a 940 revistas diferentes, de las que 79 son españolas. Las publicaciones editadas en los EE UU y el Reino Unido representan más del 50 por ciento del total, mientras que las de otros países europeos tienen escasa repercusión. En conclusión, la distribución de las referencias bibliográficas en la publicación difiere, en parte, de la habitual en las publicaciones médicas españolas (AU)


Assuntos
Bibliometria , Sistemas de Informação/normas , Publicações Periódicas como Assunto , Publicações Periódicas como Assunto/estatística & dados numéricos , Reabilitação/estatística & dados numéricos , Ciência da Informação/estatística & dados numéricos , Ciência da Informação/métodos , Bibliografia de Medicina , Bibliometria/história , Bases de Dados Bibliográficas/tendências , Bases de Dados Bibliográficas , Bases de Dados Bibliográficas/estatística & dados numéricos
19.
Rev Esp Cardiol ; 52(11): 903-9, 1999 Nov.
Artigo em Espanhol | MEDLINE | ID: mdl-10611805

RESUMO

OBJECTIVE: The bidirectional Glenn shunt is the most common palliation before the Fontan repair, especially in high-risk patients. We studied the influence of certain risk factors in bidirectional Glenn results, with and without an additional source of pulmonary blood flow. METHODS: Between 1993 and 1998 twenty patients (6-53 months of age) underwent a bidirectional Glenn shunt as the intermediate repair for the Fontan procedure. Diagnoses were: 7 cases of double inlet single ventricle, 4 of tricuspid atresia, 3 of unbalanced AV septal defect, 4 of mitral atresia, 1 hypoplastic left heart syndrome and 1 TGA with hypoplasia of the right ventricle. 17 patients had undergone previous operations. Mean preoperative arterial oxygen saturation was 78.5%. In 6 patients an auxiliary source of pulmonary blood flow was added. RESULTS: Hospital mortality was 15%. In 4 patients the bidirectional Glenn failed. By univariate analysis low weight, preoperative functional status and high pulmonary pressure were factors associated with early death. In bidirectional Glenn failure only the duration of ventilatory support was significant. By multivariate analysis, preoperative functional status and pulmonary pressure were significant. Mean postoperative arterial oxygen saturation at a mean follow-up of 10 months was 84%. CONCLUSIONS: Bidirectional Glenn shunt is an effective and low-risk palliation for patients with univentricular hearts. Only low weight and high pulmonary pressure were significant in hospital mortality, and we advise the association of an additional source of pulmonary blood flow in these patients at the start. Early extubation provides correct performance of the shunt.


Assuntos
Técnica de Fontan , Cuidados Paliativos/métodos , Artéria Pulmonar/cirurgia , Veia Cava Superior/cirurgia , Anastomose Cirúrgica/métodos , Anastomose Cirúrgica/estatística & dados numéricos , Pré-Escolar , Feminino , Cardiopatias Congênitas/cirurgia , Humanos , Lactente , Masculino , Análise Multivariada , Cuidados Paliativos/estatística & dados numéricos , Fatores de Risco
20.
Med Clin (Barc) ; 113(7): 246-9, 1999 Sep 11.
Artigo em Espanhol | MEDLINE | ID: mdl-10544378

RESUMO

BACKGROUND: Adult growth hormone (GH) deficiency is associated with changes in body composition, with lower total body water (TBW) and fat free mass (FFM) and higher fat mass (FM). These changes can be modified after sustitutive treatment with GH. PATIENTS AND METHODS: We studied 20 patients, 14 males and 6 females with hypopituitarism and GH deficiency, the mean age was 40.3 years, as well as 20 comparable controls. The diagnosis of GH deficiency was based on the lack of GH response after an hypoglycemic test. We determined body composition by bioelectrical impedance. An initial 6 month double-blind placebo controlled phase was followed by an open treatment phase ending when the patients had received GH for 18 or 24 months. The initial dose was 0.125 U/kg/week during the first month and after 0.25 U/kg/week. RESULTS: The patients showed lower TWB and FFM and higher BF in relation to controls and after 3 months of GH treatment an increase of the TBW, FFM and a decrease in BF and waist/hip ratio was observed with a steady state in the changes of body composition after 3 months that continued 6 months after the GH treatment withdraw. Two patients presented maleolar oedema, 4 arterial hypertension that was settled with GH dose reduction and in the fourth patient the treatment had to be withdraw. Three patients presented carpal tunnel syndrome. In 4 patients the treatment was withdrawn. CONCLUSIONS: In patients with adult GH deficiency, we can observe differences in the body composition that can be significantly modified by GH treatment.


Assuntos
Composição Corporal , Hormônio do Crescimento/uso terapêutico , Hipopituitarismo/tratamento farmacológico , Adulto , Composição Corporal/efeitos dos fármacos , Método Duplo-Cego , Feminino , Hormônio do Crescimento/deficiência , Humanos , Masculino
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