RESUMEN

As pílulas anticoncepcionais consistem na formulação combinada de um estrogênio e um progestagênio ou em apresentações simples de progestagênio isolado com a finalidade de bloquear a ovulação e alterar as condições do útero e das tubas uterinas, bloqueando parcialmente a foliculogênese e a inibição do pico de gonadotrofinas. Desse modo, no que concerne à temática, diversas publicações na mídia de ampla divulgação afirmam que os anticoncepcionais orais têm papel importante na sarcopenia e na hipotrofia, incluindo perda de força muscular e redução do desempenho físico. Assim, o presente trabalho tem por objetivo avaliar, por meio de pesquisas de artigos, a correlação entre anticoncepcionais hormonais orais e hipotrofia muscular. Foi concluído que os artigos científicos especializados no tema são ainda bastante inconclusivos, sugerindo que há indicações de que usuárias de anticoncepcional oral sejam mais suscetíveis ao dano muscular induzido por exercícios, contudo ainda não há consenso.

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Anticonception pills consist of a combined formulation of an estrogen and a progestogen or simple presentations of progestogen alone with the purpose of blocking ovulation and altering the conditions of the uterus and uterine tubes, partially blocking folliculogenesis and inhibiting the gonadotropin peak. Thus, with regard to the subject, several widely publicized media publications claim that oral contraceptives play an important role in sarcopenia and hypotrophy, including loss of muscle strength and reduced physical performance. So, the present work aims to evaluate through article searches the correlation between oral hormonal contraceptives and muscle hypotrophy. It was concluded that scientific articles specialized on the subject are still quite inconclusive, suggesting that there are indications that oral contraceptive users are more susceptible to exercise-induced muscle damage, however there is still no consensus.

Asunto(s)

Humanos , Femenino , Anticonceptivos Orales/efectos adversos , Progestinas/efectos adversos , Músculo Esquelético/efectos de los fármacos , Inhibición de la Ovulación/efectos de los fármacos , Rendimiento Físico Funcional

RESUMEN

BACKGROUND: To explore the mutual relationship between multimorbidity, mental illness and frailty, we have set-up the Multimorbidity and Mental health Cohort Study in FRAILty and Aging (MiMiCS-FRAIL) cohort. At the population level, multimorbidity, frailty and late-life depression are associated with similar adverse outcomes (i.e. falls, disability, hospitalization, death), share the same risk factors, and partly overlap in their clinical presentation. Moreover, these three variables may share a common underlying pathophysiological mechanism like immune-metabolic dysregulation. The overall objectives of MiMiCS-FRAIL are 1) to explore (determinants of) the cross-sectional and longitudinal relationship between multimorbidity, depression, and frailty among non-demented geriatric outpatients; 2) to evaluate molecular levels of senoinflammation as a broad pathophysiological process underlying these conditions; and 3) to examine adverse outcomes of multimorbidity, frailty and depression and their interconnectedness. METHODS: MiMiCS-FRAIL is an ongoing observational cohort study of geriatric outpatients in Brazil, with an extensive baseline assessment and yearly follow-up assessments. Each assessment includes a comprehensive geriatric assessment to identify multimorbidity and geriatric syndromes, a structured psychiatric diagnostic interview and administration of the PHQ-9 to measure depression, and several frailty measures (FRAIL, Physical Phenotype criteria, 36-item Frailty Index). Fasten blood samples are collected at baseline to assess circulating inflammatory and anti-inflammatory cytokines, leukocytes' subpopulations, and to perform immune-metabolic-paired miRome analyses. The primary outcome is death and secondary outcomes are the number of falls, hospital admissions, functional ability, well-being, and dementia. Assuming a 5-year mortality rate between 25 and 40% and a hazard rate varying between 1.6 and 2.3 for the primary determinants require a sample size between 136 and 711 patients to detect a statistically significant effect with a power of 80% (beta = 0.2), an alpha of 5% (0.05), and an R2 between the predictor (death) and all covariates of 0.20. Local ethical board approved this study. DISCUSSION: Frailty might be hypothesized as a final common pathway by which many clinical conditions like depression and chronic diseases (multimorbidity) culminate in many adverse effects. The MiMiCS-FRAIL cohort will help us to understand the interrelationship between these variables, from a clinical perspective as well as their underlying molecular signature.

Asunto(s)

Fragilidad , Anciano , Envejecimiento , Brasil , Estudios de Cohortes , Costo de Enfermedad , Estudios Transversales , Depresión/epidemiología , Anciano Frágil , Fragilidad/epidemiología , Evaluación Geriátrica , Humanos , Salud Mental , Multimorbilidad

RESUMEN

Ventral prostate (VP) morphogenesis starts during embryonic development and continues for the first three postnatal weeks. Heparan sulfate (HS) affects paracrine signaling. Heparanase-1 (HPSE) is the only enzyme capable of cleaving HS. HPSE releases the HS bioactive fragment and mobilizes growth factors. Little is known, however, about HS turnover and HPSE function during VP morphogenesis. In this study, we measured HSPG expression and analyzed the expression and distribution of HPSE in the rat VP. HPSE was predominantly expressed by the VP epithelium. The VP was treated with heparin in ex vivo cultures to interfere with HS and resulted in delayed epithelial growth. Hpse knockdown using siRNA delayed epithelial growth in the first postnatal week ex vivo, which was similar to treating with the lower concentration of heparin. Hpse silencing was related to changes in HS chain length (as determined by size-exclusion chromatography, up-regulation of Mmp9, and down-regulation of Mmp2 expression). It also down-modulated ERK1/2 phosphorylation, suggesting a reduction in signaling, likely due to decreased HS cleavage and growth factor bioavailability. Our results showed that HPSE played a role in early epithelial growth during the first week of VP postnatal development. Developmental Dynamics 248:211-220, 2019. © 2019 Wiley Periodicals, Inc.

Asunto(s)

Epitelio/crecimiento & desarrollo , Glucuronidasa/metabolismo , Próstata/crecimiento & desarrollo , Animales , Animales Recién Nacidos , Células Cultivadas , Epitelio/metabolismo , Femenino , Regulación de la Expresión Génica , Masculino , Embarazo , Próstata/citología , Ratas , Transducción de Señal

RESUMEN

Androgens induce rat prostate induction from the urogenital sinus epithelium at embryonic day 17.5. Subsequent morphogenesis, including epithelial cord growth, branching, and canalization, results from concerted paracrine interactions with the stroma. A significant number of paracrine factors bind heparan sulfate (HS). We hypothesized that interfering with overall sulfation could disrupt the signaling mediated by HS-binding factors and that the undersulfated environment would allow investigation of individual exogenous morphogens. First, we investigated whether acinar morphogenesis involved HS-proteoglycan expression and found that syndecans 1 and 3 were upregulated in RWPE1 cells in the transition from two- to three-dimensional (3D) Matrigel, capable of promoting spheroid formation. We then investigated whether sodium chlorate, a general sulfation inhibitor, interfered with spheroid formation by RWPE1 cells and acinar morphogenesis in ex vivo ventral prostate (VP) organ culture. As expected, treatment with sodium chlorate inhibited spheroid formation by RWPE1 cells in 3D culture. Chlorate also inhibited ex vivo VP epithelial branching and canalization, resulting in long branchless epithelial structures. We then investigated whether the HS-binding factors, FGF10, TGFß1, and SDF1, could reverse the effect of sodium chlorate. Although no effect was seen in the FGF10- and TGFß1-treated samples, SDF1 promoted epithelial canalization in the low sulfated environment, highlighting its specific role in lumen formation. Altogether, the results show that sodium chlorate perturbed prostate morphogenesis and allowed investigation of factors involved in branching and/or canalization, implicating SDF1 signaling in epithelial canalization.

Asunto(s)

Quimiocina CXCL12/metabolismo , Células Epiteliales/metabolismo , Morfogénesis/fisiología , Próstata/metabolismo , Próstata/fisiología , Animales , Línea Celular , Colágeno/metabolismo , Combinación de Medicamentos , Células Epiteliales/fisiología , Epitelio/metabolismo , Epitelio/fisiología , Factor 10 de Crecimiento de Fibroblastos/metabolismo , Regulación del Desarrollo de la Expresión Génica/fisiología , Proteoglicanos de Heparán Sulfato/metabolismo , Heparitina Sulfato/metabolismo , Humanos , Laminina/metabolismo , Masculino , Técnicas de Cultivo de Órganos/métodos , Organogénesis/fisiología , Proteoglicanos/metabolismo , Ratas , Ratas Wistar , Transducción de Señal/fisiología , Factor de Crecimiento Transformador beta1/metabolismo

RESUMEN

Glutamate decarboxylase or glutamic acid decarboxylase (GAD) is a protein associated with autoimmune diseases, including type-1 diabetes. This disease is primarily associated with the occurrence of a specific isoform: GAD65. Conversely, some specific peptides of this protein may block autoimmunity in diabetes. In this respect, understanding the relationship between GAD and the development of diabetes is important, and it is necessary to understand the role of each GAD peptide to design effective autoimmune diabetes treatments. The purpose of the present study was to analyze the effects of treatment with GAD-derived peptides p217 and p290 on INS receptors in the salivary epithelium of nonobese diabetic (NOD) animals. Three groups of 7 mice each were studied: I, BALB/c mice (control); II, NOD mice; and III, NOD mice treated with peptides p290 and p217. Groups I and II only received buffered saline solution. Glucose levels were measured daily during the 21 days of the experiment. After the study, the animals were euthanized and the parotid and submandibular glands were removed for the analysis of INS-R by fluorescence microscopy. Therapy with two peptides together was associated with reduced glucose levels in NOD mice and intense INS-R expression in both salivary organs. Our approach of combining GAD p217 and p290 peptides contributed to hormonal balance and promoted the repair of INS-R.

Asunto(s)

Diabetes Mellitus Tipo 1/tratamiento farmacológico , Células Epiteliales/efectos de los fármacos , Glutamato Descarboxilasa/metabolismo , Hipoglucemiantes/farmacología , Glándula Parótida/efectos de los fármacos , Fragmentos de Péptidos/farmacología , Receptor de Insulina/metabolismo , Glándula Submandibular/efectos de los fármacos , Animales , Biomarcadores/sangre , Glucemia/efectos de los fármacos , Glucemia/metabolismo , Diabetes Mellitus Tipo 1/sangre , Diabetes Mellitus Tipo 1/enzimología , Diabetes Mellitus Tipo 1/patología , Modelos Animales de Enfermedad , Células Epiteliales/enzimología , Células Epiteliales/patología , Femenino , Ratones Endogámicos BALB C , Ratones Endogámicos NOD , Glándula Parótida/enzimología , Glándula Parótida/patología , Glándula Submandibular/enzimología , Glándula Submandibular/patología

RESUMEN

Agonists such as icilin and menthol can activate the cool temperature-sensitive ion channel TRPM8. However, biological responses to menthol may occur independently of TRPM8 activation. In the rodent urinary bladder, menthol facilitates the micturition reflex but inhibits muscarinic contractions of the detrusor smooth muscle. The site(s) of TRPM8 expression in the bladder are controversial. In this study we investigated the regulation of bladder contractility in vitro by menthol. Bladder strips from wild type and TRPM8 knockout male mice (25-30 g) were dissected free and mounted in organ baths. Isometric contractions to carbachol (1 nM-30 µM), CaCl2 (1 µM to 100 mM) and electrical field stimulation (EFS; 8, 16, 32 Hz) were measured. Strips from both groups contracted similarly in response to both carbachol and EFS. Menthol (300 µM) or nifedipine (1 µM) inhibited carbachol and EFS-induced contractions in both wild type and TRPM8 knockout bladder strips. Incubation with the sodium channel blocker tetrodotoxin (1 µM), replacement of extracellular sodium with the impermeant cation N-Methyl-D-Glucamine, incubation with a cocktail of potassium channel inhibitors (100 nM charybdotoxin, 1 µM apamin, 10 µM glibenclamide and 1 µM tetraethylammonium) or removal of the urothelium did not affect the inhibitory actions of menthol. Contraction to CaCl2 was markedly inhibited by either menthol or nifedipine. In cultured bladder smooth muscle cells, menthol or nifedipine abrogated the carbachol or KCl-induced increases in [Ca2+]i. Intravesical administration of menthol increased voiding frequency while decreasing peak voiding pressure. We conclude that menthol inhibits muscarinic bladder contractions through blockade of L-type calcium channels, independently of TRPM8 activation.

Asunto(s)

Mentol/administración & dosificación , Contracción Muscular/efectos de los fármacos , Músculo Liso/fisiología , Canales Catiónicos TRPM/metabolismo , Vejiga Urinaria/fisiología , Animales , Bloqueadores de los Canales de Calcio/farmacología , Cloruro de Calcio/metabolismo , Carbacol/farmacología , Células Cultivadas , Estimulación Eléctrica/métodos , Técnicas In Vitro , Masculino , Mentol/farmacología , Ratones , Ratones Noqueados , Nifedipino/farmacología , Canales Catiónicos TRPM/genética , Tetrodotoxina/farmacología

RESUMEN

RECK is expressed in the rat ventral prostate. The amount of mRNA increased after castration. In situ hybridization and immunohistochemistry demonstrated a transition from epithelial to stromal expression. This demonstrates that stromal cells upregulate RECK expression to regulate matrix metalloproteinases activity responsible for extracellular matrix (ECM) changes occurring after castration.

Asunto(s)

Células Epiteliales/metabolismo , Próstata/metabolismo , Proteínas Supresoras de Tumor/biosíntesis , Animales , Células Epiteliales/citología , Células Epiteliales/enzimología , Proteínas Ligadas a GPI/biosíntesis , Proteínas Ligadas a GPI/genética , Masculino , Metaloproteinasas de la Matriz/metabolismo , Orquiectomía , Próstata/citología , Próstata/enzimología , Ratas , Ratas Wistar , Células del Estroma/citología , Células del Estroma/enzimología , Células del Estroma/metabolismo , Proteínas Supresoras de Tumor/genética