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BACKGROUND: N. wightii (Leguminosae) is valued as a cover crop and as a potential source of protein in food insecure countries. However, plantlet establishment is limited by physical dormancy. Our previous work has shown that exposure of N. wightii seeds to cryogenic temperatures is able to overcome physical dormancy. OBJECTIVE: The current study is an extension of that work where the field performance and nutritional composition of plants regenerated from N. wightii seeds was investigated. RESULTS: It was evident that plants regenerated from cryopreserved seeds displayed faster growth rates than those from control seeds. In addition, cryopreservation did not alter the nutritional profile of plants produced from cryo-stored seeds. CONCLUSION: Collectively, the results indicate that cryopreservation serves as a suitable strategy for the preservation of seeds of N. wightii with the added benefit of also serving as a dormancy breaking mechanism upon retrieval from cryogenic temperatures. Doi.org/10.54680/fr23510110712.
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Criopreservação , Fabaceae , Estado Nutricional , Sementes , TemperaturaRESUMO
BACKGROUND: Cryopreservation currently represents the most suitable strategy for the long-term conservation of plant germplasm. While much effort has focused on the development of protocols to enable successful cryostorage, there are few, if any reports, that consider the effect of cryogenic temperatures on the phytohormone status of the seed and developing seedlings. OBJECTIVE: To investigate the effect of cryopreservation on external seed coat features as well as levels of indole-3-acetic acid (IAA), abscisic acid (ABA) and 1-aminocyclopropane-1-carboxylic acid (ACC) in maize. MATERIALS AND METHODS: Two groups of seeds at 6% moisture content were compared: one was maintained at 4 degree C (control) while the other was exposed to LN within cryo-vials. RESULTS: Seeds exposed to cryogenic temperatures were characterized by the presence of large cracks in the seed coat compared with control seeds. Cryogenic exposure also resulted in a reduction in biomass and plant height. Results from the phytohormone analysis showed an initial reduction in the levels of IAA, ABA and ACC after 7 days of growth followed by sharp increase in levels relative to the control by 14 days. Whilst the roles of ABA and ethylene (and by extension, its precursor ACC) are well studied as stress response molecules, much less is known about the potentially vital role of auxins in regulating plant growth under conditions of low temperature stress. CONCLUSION: It is postulated that the interaction of all three hormones modulate crosstalk between various stress responses and recovery pathways to ameliorate the damage caused by freezing stress and enable plant survival. Given the dearth of information on phytohormones in cryobiology, more studies are needed to fully elucidate these relationships in the context of freezing stress caused by liquid nitrogen. Doi.org/10.54680/fr23610110612.
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Reguladores de Crescimento de Plantas , Zea mays , Reguladores de Crescimento de Plantas/farmacologia , Reguladores de Crescimento de Plantas/metabolismo , Criopreservação , Ácido Abscísico/farmacologia , Sementes/fisiologia , NitrogênioRESUMO
BACKGROUND: Trees within the Calophyllum genus are multi-use trees that produce valuable wood, phytochemicals with a range of biological activities, and seed oil as a source of biodiesel. As a consequence of climate change, there is a need to develop strategies to preserve valuable plant genetic resources. Cryopreservation represents the most suitable option for the long-term storage of germplasm with minimal space and maintenance requirements. OBJECTIVE: To determine appropriate methods to cryopreserve seeds of Calophyllum antillanum and maintain secondary compound production. MATERIALS AND METHODS: Seeds at a moisture content of 6% were used to evaluate two treatments: seeds immersed in liquid nitrogen and control seeds. Biosynthetic pathway efficiency was assessed post-cryo by determining anthraquinone contents in roots, stems and leaves following 30 and 75 d of seedling growth. RESULTS: The results indicated that exposure to liquid nitrogen delayed germination and seedling emergence for a period of up to 45 d after seed sowing. By 60 d of cultivation, no significant differences in plant growth were observed for cryostored and control seeds. The levels of anthraquinones, which were also measured in seeds and seedlings, were lower in plants regenerated from cryostored seeds following 30 d of growth, but there were no differences in roots and stems by 75 d of growth. Furthermore, the difference in leaf anthraquinone levels for cryopreserved and control seeds at 75 d was much smaller than at 30 d. CONCLUSION: The low initial anthraquinone levels in emerging seedlings correlated with the initial slow growth of cryopreserved seeds.
Assuntos
Calophyllum , Plântula , Antraquinonas/farmacologia , Criopreservação/métodos , Nitrogênio/química , Folhas de Planta , SementesRESUMO
BACKGROUND: Swietenia mahagoni wood is one of the most valuable in world trade and, as a result, natural populations have been decimated due to unsustainable harvesting. The decline in natural population levels is being exacerbated by climate change. In order to ensure the preservation of valuable genotypes, there is an urgent need to develop strategies to conserve the genetic diversity present within this species. At present, cryopreservation is the most viable option for the long-term storage of plant germplasm, particularly for long-lived species which are challenging to maintain in the field. OBJECTIVE: To cryopreserve intact seeds of S. mahagoni, with the dual goal of retaining the biosynthetic capacity of plants, which is critical since this species is highly valued for medicinal purposes. MATERIALS AND METHODS: Seeds at a moisture content of 6% were immersed in liquid nitrogen (LN) before warming and recovery. Plantlet establishment and growth were assessed over a period of 70 days and anthraquinone synthesis was determined in roots, stems and leaves. RESULTS: The results showed an initial lag in the germination rate of cryopreserved seeds compared with control seeds; however, this difference disappeared over time. The lag in seedling emergence observed in cryostored seeds was also evident in the plant characteristics measured following 30 days of culture when all plant parameters measured were significantly higher in plants produced from control than cryostored seeds. However, after 70 days of growth, these differences were no longer apparent. Anthraquinone levels were also initially lower (at 30 days) in plants regenerated from cryopreserved seeds than those from control seeds, however, this difference was substantially reduced by 70 days thereby indicating the ability of these plants to accumulate secondary metabolites, albeit at a reduced rate, during the early stages of development. CONCLUSION: In S. mahagoni, the delay in anthraquinone production in plants regenerated from cryostored seeds during the early stages of development may have occurred as a consequence of the preferential allocation of resources towards the initiation of recovery processes in response to the stresses imposed by cryopreservation. Once the stresses were overcome and plant growth resumed, resources could be directed to secondary processes such as anthraquinone synthesis. doi.org/10.54680/fr22610110412.
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Criopreservação , Meliaceae , Criopreservação/métodos , Sementes/fisiologia , Plântula , Germinação/fisiologia , PlantasRESUMO
BACKGROUND: The overall mortality of patients with COVID-19 admitted to intensive care units is approximately 40%. Aim: To describe the characteristics of a cohort of patients with COVID-19 who required invasive mechanical ventilation due to severe hypoxemic acute respiratory failure at a general hospital in Santiago, Chile. MATERIAL AND METHODS: Review of medical records and follow up for 28 days of patients with COVID-19 confirmed by polymerase chain reaction who required invasive mechanical ventilation and who were admitted to the intensive care unit from March 24 to June 7, 2020. RESULTS: Data from 152 patients aged 58 (interquartile range (IQR) 47-65 years (66% men) was analyzed. As of July 5, 36 (24%) had died, 75 (49%) were discharged, 10 (7%) were still on invasive mechanical ventilation, 11 (7%) remained with tracheostomy but without invasive mechanical ventilation, and 20 (13%) were hospitalized in a basic unit. The median time on invasive mechanical ventilation among extubated patients was 14 days (IQR 10-21) and 121 (80%) were in the prone position. Patients who died were older, had a higher frequency of diabetes mellitus and a higher driving pressure at 7 days than those discharged alive from the intensive care unit. Conclusions: In this study mortality was lower than that reported in the first international studies, probably due to the selection of younger patients and greater knowledge of the disease.
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Humanos , Masculino , Feminino , COVID-19/terapia , Respiração Artificial , Estudos Retrospectivos , SARS-CoV-2 , Hospitalização , Unidades de Terapia IntensivaRESUMO
BACKGROUND: The overall mortality of patients with COVID-19 admitted to intensive care units is approximately 40%. AIM: To describe the characteristics of a cohort of patients with COVID-19 who required invasive mechanical ventilation due to severe hypoxemic acute respiratory failure at a general hospital in Santiago, Chile. MATERIAL AND METHODS: Review of medical records and follow up for 28 days of patients with COVID-19 confirmed by polymerase chain reaction who required invasive mechanical ventilation and who were admitted to the intensive care unit from March 24 to June 7, 2020. RESULTS: Data from 152 patients aged 58 (interquartile range (IQR) 47-65 years (66% men) was analyzed. As of July 5, 36 (24%) had died, 75 (49%) were discharged, 10 (7%) were still on invasive mechanical ventilation, 11 (7%) remained with tracheostomy but without invasive mechanical ventilation, and 20 (13%) were hospitalized in a basic unit. The median time on invasive mechanical ventilation among extubated patients was 14 days (IQR 10-21) and 121 (80%) were in the prone position. Patients who died were older, had a higher frequency of diabetes mellitus and a higher driving pressure at 7 days than those discharged alive from the intensive care unit. CONCLUSIONS: In this study mortality was lower than that reported in the first international studies, probably due to the selection of younger patients and greater knowledge of the disease.
Assuntos
COVID-19 , COVID-19/terapia , Feminino , Hospitalização , Humanos , Unidades de Terapia Intensiva , Masculino , Respiração Artificial , Estudos Retrospectivos , SARS-CoV-2RESUMO
Resumen: Objetivo: Analizar el nivel de citoquinas proinflamatorias en la grasa articular del paquete adiposo en pacientes con gonartrosis, en relación con la grasa subcutánea del muslo. Material y métodos: Efectuamos un estudio de grasa del paquete adiposo articular de la rodilla afectada de artrosis y de la grasa subcutánea del muslo del mismo lado, a la mayor distancia de la articulación en seis pacientes con gonartrosis grave, con una edad media de 68 años (rango: 55-81 años). De las muestras de grasa se obtuvieron las células mesenquimales progenitoras. Los sobrenadantes de células mesenquimales obtenidas se utilizaron para analizar factores inflamatorios (IL-1b, IL6, IL8, IL9, IL1ra, IL12, IL13, IL15) y angiogénicos (VEGF, PDGF bb), así como citoquinas inmunomoduladoras (IP-10 e INF-γ) y se compararon las medias de dos muestras. Resultados: El análisis cuantitativo reveló una disminución significativa (p < 0.05) de IL-1b, IL6, IL8, IL9, IL1ra, IL12, IL13 y un aumento de IL15 en la grasa de Hoffa frente al tejido adiposo subcutáneo. Del mismo modo, el análisis de factores angiógenicos como VEGF y PDGF bb, al igual que los factores IP-10 e INF-γ presentaron una disminución significativa en la grasa de Hoffa (p < 0.05) frente al tejido adiposo subcutáneo. Discusión: Las células mesenquimales del paquete adiposo articular de la rodilla artrósica grave muestran una disminución significativa de citoquinas inflamatorias, aun en el estado crónico, y una disminución significativa de factores angiogénicos y citoquinas inmunomoduladoras (IP10 e INF).
Abstract: Objective: To analyze the level of pro-inflammatory cytokines in osteoarthritis knee joint fat pad in relation to the subcutaneous fat of the thigh. Material and methods: We performed a study of fat of the knee joint adipose affected of osteoarthritis and subcutaneous fat of the thigh of the same side to the greater distance of the joint in six patients with severe gonarthrosis, with a mean age of 68 years (range: 55-81 years). From the fat samples the progenitor mesenchymal cells were obtained. The supernatants of mesenchymal cells obtained to analyze inflammatory factors (IL-1b, IL6, IL9, IL1ra, IL12, IL13, IL15) and angiogenic (VEGF, PDGF bb) and immunomodulatory cytokines (IP-10 and INF-γ) means of two samples. Results: Quantitative analysis revealed a significant (p < 0.05) decrease in IL-1b, IL6, IL8, IL9, IL1ra, IL12, IL13 and increase of IL15 in Hoffa fat pad versus subcutaneous adipose tissue. Likewise, the analysis of angiogenic factors such as VEGF and PDGF, as well as factors IP-10 and INF-γ presented a significant decrease (p < 0.05) in Hoffa fat pad versus subcutaneous adipose tissue. Discussion: Mesenchymal cells from the adipose tissue of the severe osteoarthritic knee show a significant decrease in inflammatory cytokines even in the chronic state and a significant decrease in angiogenic factors and immunomodulatory cytokines (IP10 and INF).
Assuntos
Humanos , Idoso , Idoso de 80 Anos ou mais , Citocinas/metabolismo , Osteoartrite do Joelho/metabolismo , Gordura Subcutânea/metabolismo , Coxa da Perna , Tecido Adiposo , Articulação do Joelho , Pessoa de Meia-IdadeRESUMO
OBJECTIVE: To analyze the level of pro-inflammatory cytokines in osteoarthritis knee joint fat pad in relation to the subcutaneous fat of the thigh. MATERIAL AND METHODS: We performed a study of fat of the knee joint adipose affected of osteoarthritis and subcutaneous fat of the thigh of the same side to the greater distance of the joint in six patients with severe gonarthrosis, with a mean age of 68 years (range: 55-81 years). From the fat samples the progenitor mesenchymal cells were obtained. The supernatants of mesenchymal cells obtained to analyze inflammatory factors (IL-1b, IL6, IL9, IL1ra, IL12, IL13, IL15) and angiogenic (VEGF, PDGF bb) and immunomodulatory cytokines (IP-10 and INF-) means of two samples. RESULTS: Quantitative analysis revealed a significant (p 0.05) decrease in IL-1b, IL6, IL8, IL9, IL1ra, IL12, IL13 and increase of IL15 in Hoffa fat pad versus subcutaneous adipose tissue. Likewise, the analysis of angiogenic factors such as VEGF and PDGF, as well as factors IP-10 and INF- presented a significant decrease (p 0.05) in Hoffa fat pad versus subcutaneous adipose tissue. DISCUSSION: Mesenchymal cells from the adipose tissue of the severe osteoarthritic knee show a significant decrease in inflammatory cytokines even in the chronic state and a significant decrease in angiogenic factors and immunomodulatory cytokines (IP10 and INF).
OBJETIVO: Analizar el nivel de citoquinas proinflamatorias en la grasa articular del paquete adiposo en pacientes con gonartrosis, en relación con la grasa subcutánea del muslo. MATERIAL Y MÉTODOS: Efectuamos un estudio de grasa del paquete adiposo articular de la rodilla afectada de artrosis y de la grasa subcutánea del muslo del mismo lado, a la mayor distancia de la articulación en seis pacientes con gonartrosis grave, con una edad media de 68 años (rango: 55-81 años). De las muestras de grasa se obtuvieron las células mesenquimales progenitoras. Los sobrenadantes de células mesenquimales obtenidas se utilizaron para analizar factores inflamatorios (IL-1b, IL6, IL8, IL9, IL1ra, IL12, IL13, IL15) y angiogénicos (VEGF, PDGF bb), así como citoquinas inmunomoduladoras (IP-10 e INF-) y se compararon las medias de dos muestras. RESULTADOS: El análisis cuantitativo reveló una disminución significativa (p 0.05) de IL-1b, IL6, IL8, IL9, IL1ra, IL12, IL13 y un aumento de IL15 en la grasa de Hoffa frente al tejido adiposo subcutáneo. Del mismo modo, el análisis de factores angiógenicos como VEGF y PDGF bb, al igual que los factores IP-10 e INF- presentaron una disminución significativa en la grasa de Hoffa (p 0.05) frente al tejido adiposo subcutáneo. DISCUSIÓN: Las células mesenquimales del paquete adiposo articular de la rodilla artrósica grave muestran una disminución significativa de citoquinas inflamatorias, aun en el estado crónico, y una disminución significativa de factores angiogénicos y citoquinas inmunomoduladoras (IP10 e INF).
Assuntos
Citocinas , Osteoartrite do Joelho , Gordura Subcutânea , Tecido Adiposo , Idoso , Idoso de 80 Anos ou mais , Citocinas/metabolismo , Humanos , Articulação do Joelho , Pessoa de Meia-Idade , Osteoartrite do Joelho/metabolismo , Gordura Subcutânea/metabolismo , Coxa da PernaRESUMO
Background: An adequate sleeping pattern recovers physical and mental wellbeing and improves mood. Aim: To determine the association between quality of life and quantity of sleep in older people living in Santiago and Viña del Mar, Chile. Material and Methods: The Spanish versions of the Health Promoting Lifestyles survey and the Pittsburgh Sleep Quality Index were answered by 975 non-disabled participants aged 70.7 ± 7.4 years (61% females). Results: Older adults who slept < 7.0 or > 8.5 hours (h) per night were at higher risk of having lower quality of life scores for all sub-domains, compared with those that slept 7.0 to 8.5 h per night. Conclusions: A normal sleep pattern in older adults is associated with a better quality of life perception.
Assuntos
Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Qualidade de Vida , Sono/fisiologia , Fatores Etários , Análise de Variância , Chile , Estudos Transversais , Estilo de Vida , Valores de Referência , Fatores de Risco , Autorrelato , Fatores de TempoRESUMO
We study, by means of the density matrix renormalization group, the infinite U Hubbard model--with one hole doped away from half filling--in triangular and square lattices with frustrated hoppings, which invalidate Nagaoka's theorem. We find that these kinetically frustrated models have antiferromagnetic ground states with classical local magnetization in the thermodynamic limit. We identify the mechanism of this kinetic antiferromagnetism with the release of the kinetic energy frustration, as the hole moves in the established antiferromagnetic background. This release can occur in two different ways: by a nontrivial spin Berry phase acquired by the hole, or by the effective vanishing of the hopping amplitude along the frustrating loops.
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Accurate diagnosis of malignant pleura mesothelioma (MPM) is challenging. Differential diagnosis of MPM versus lung adenocarcinoma (AD) is particularly difficult, yet clinically important since the two neoplasias call for different treatment approaches. Circulating miRNA-profiling to identify miRNAs that can be used to distinguish MPM from AD has not been reported. We conducted a wide screening study of miRNA profiles in serum pools of MPM patients (N = 11), AD patients (N = 36), and healthy subjects (N = 45) to identify non-invasive biomarkers for differential diagnosis of MPM and AD, using deep sequencing. Sequencing detected up to 300 known miRNAs and up to 25 novel miRNAs species in the serum samples. Among known miRNAs, 7 were upregulated in MPM and 12 were upregulated in AD compared to healthy controls. Of these, eight were distinctive for AD and three were unique for MPM. Direct comparison of the miRNA profiles for MPM and AD revealed differences in miRNA levels that could be useful for differential diagnosis. No differentially expressed novel miRNAs were found. Further bioinformatics analysis indicated that three upregulated miRNAs in MPM are associated with the p38 pathway. There are unique alterations in serum miRNAs in MPM and AD compared to healthy controls, as well as differences between MPM and AD profiles. Differing miRNA levels between MPM and AD may be useful for differential diagnosis. A potential association to p38 pathway of three upregulated miRNAs in MPM was revealed.
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BACKGROUND: An adequate sleeping pattern recovers physical and mental wellbeing and improves mood. AIM: To determine the association between quality of life and quantity of sleep in older people living in Santiago and Viña del Mar, Chile. MATERIAL AND METHODS: The Spanish versions of the Health Promoting Lifestyles survey and the Pittsburgh Sleep Quality Index were answered by 975 non-disabled participants aged 70.7 ± 7.4 years (61% females). RESULTS: Older adults who slept < 7.0 or > 8.5 hours (h) per night were at higher risk of having lower quality of life scores for all sub-domains, compared with those that slept 7.0 to 8.5 h per night. CONCLUSIONS: A normal sleep pattern in older adults is associated with a better quality of life perception.
Assuntos
Qualidade de Vida , Sono/fisiologia , Fatores Etários , Idoso , Análise de Variância , Chile , Estudos Transversais , Feminino , Humanos , Estilo de Vida , Masculino , Pessoa de Meia-Idade , Valores de Referência , Fatores de Risco , Autorrelato , Fatores de TempoRESUMO
The Myroxylon pereirae resin (MP; balsam of Peru) is a natural resin used in the local treatment of burns and wounds. M. pereirae extracts and distillates are very often contained in a wide range of cosmetic products and causes frequently allergic contact dermatitis - to the extent of being considered an allergy marker to perfumes. We have carried out a retrospective study of 863 patients who have been submitted to patch tests from January 2002 to June 2004. A total of 50 patients were positive to MP. Thus, the prevalence was 5.79%, slightly higher in men (7.32%) than in women (4.91%). The positive patch tests were relevant in 64%. Over the last years, it appears that there is a clear increase of the prevalence of the sensitization to MP in all the studies published. We observe an increase of the prevalence especially in aged patients, where the sensitization is linked with the use of topical medications secondary to stasis dermatitis. The high frequency of allergy to MP in our area might be associated with manipulation of citrus fruits. The increasing use of cosmetic products by the male population can also be held responsible for the higher sensitization rate in this group of patients.
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Alérgenos/efeitos adversos , Dermatite Alérgica de Contato/diagnóstico , Dermatite Alérgica de Contato/epidemiologia , Myroxylon , Resinas Vegetais/efeitos adversos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Dermatite Alérgica de Contato/etiologia , Dermatite Alérgica de Contato/patologia , Feminino , Humanos , Masculino , Prontuários Médicos , Pessoa de Meia-Idade , Testes do Emplastro , Prevalência , Estudos Retrospectivos , Espanha/epidemiologiaAssuntos
Técnica de Moldagem Odontológica , Técnicas In Vitro , Sulfato de Cálcio , Ligas de Cromo , Elastômeros de Silicone/classificação , Elastômeros de Silicone/química , Ligas de Ouro , Restaurações Intracoronárias , Materiais para Moldagem Odontológica/química , Preparo da Cavidade Dentária/métodos , Interpretação Estatística de DadosRESUMO
Two new withanolide glycosides, (20R,22R)-O-(3)-alpha-L-rhamnopyranosyl(1-->4)-beta-D-glucopyranosyl-1 alpha,12 beta-diacetoxy-20-hydroxywitha-5,24-dienolide (3) and (20R,22R)-O-(3)-beta-D-xylopyranosyl(1-->3)-[beta-D-xylopyranosyl(1-->4)]-beta-D-glucopyranosyl-1 alpha-acetoxy-12 beta,20-dihydroxywitha-5,24-dienolide (4), were isolated from the leaves and root of Dunalia brachyacantha. Their aglycones, (20R,22R)-1 alpha,12 beta-diacetoxy-3 beta,20-dihydroxywitha-5,24-dienolide (or 1 alpha,12 beta-diacetyldunawithagenine) and (20R,22R)-1 alpha-acetoxy-3 beta,12 beta,20-trihydroxywitha-5,24-dienolide (or 1 alpha-acetyl-12 beta-hydroxydunawithagenine), are novel. The known 18-acetoxywithanolide D (1) and 18-acetoxy-5,6-deoxy-5-withenolide D (2) were also isolated from the leaves. These last two compounds were shown to be responsible for the trypanocidal, leishmanicidal, and bactericidal activities manifested by the crude ethanolic extract. The structures were deduced from spectroscopic data and on the basis of chemical evidence.
Assuntos
Dissacarídeos/isolamento & purificação , Ergosterol/análogos & derivados , Lactonas/isolamento & purificação , Plantas Medicinais/química , Solanaceae/química , Trissacarídeos/isolamento & purificação , Tripanossomicidas/isolamento & purificação , Tripanossomicidas/farmacologia , Animais , Bactérias/efeitos dos fármacos , Bolívia , Dissacarídeos/química , Glicosídeos/isolamento & purificação , Glicosídeos/farmacologia , Lactonas/química , Leishmania/efeitos dos fármacos , Espectroscopia de Ressonância Magnética , Espectrometria de Massas , Testes de Sensibilidade Microbiana , Folhas de Planta/química , Raízes de Plantas/química , Espectrofotometria Infravermelho , Trissacarídeos/química , Trypanosoma cruzi/efeitos dos fármacos , VitanolídeosRESUMO
El nevejecimiento de la población, proceso que abarca también a América Latina, y los cambios demográficos que este hecho origina, tiene un significado relevante para los kinesiológos que trabajen en gerontología; esto hace además imprescindible que la acción del kinesiológo empiece a estar presente en todos los niveles del proceso de atención en salud, tanto asistencial como de prevención. Es importante señalar también que la tendencia actual en el campo de la salud es poner énfasis en el cambio de servicios manejado por el profesional, a servicios protagonizados por el paciente, es decir hay un cambio de ofertadores (nuestro rol ahora) a proveedores
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Humanos , Idoso , Geriatria , Saúde do Idoso , Especialidade de Fisioterapia/tendências , Causas de Morte/tendências , Dinâmica Populacional , Necessidades e Demandas de Serviços de Saúde , Equipe de Assistência ao Paciente , Encaminhamento e ConsultaRESUMO
The peritoneal equilibration test (PET) is used as a tool for dialysis prescription. In order to establish which parameters can predict peritoneal transport type, we studied 55 patients on continuous ambulatory peritoneal dialysis (CAPD), who were subjected to a standard PET. Clinical data (sex, age, calculated body surface area [BS], average time on dialysis [TD], and presence of diabetes mellitus), laboratory variables, (serum creatinine [SCr] blood urea nitrogen [BUN], serum albumin [SA], and residual renal function), and adequacy parameters (dialysate creatinine clearance [CrCl], weekly clearance of urea normalized to total body water [KT/V], protein catabolic rate, and dialysis index), were obtained and recorded at the time of the PET. The study group was composed of 29 males and 26 females, mean age of 43.5 +/- 16 years, and average TD of 25.2 +/- 18 months. PET results: 13 patients were low, 16 low average, 19 high average, and 7 high peritoneal transporters. According to the logistic regression analysis, the factors significantly associated with the type of peritoneal transport were: BS, SA, dialysate CrCl, and TD (coefficients 7.2, -1.23, 0.72, and -0.03, respectively). Greater BS and lower SA directly correlate with high peritoneal transport, and are the strongest predictors for the model.
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Superfície Corporal , Diálise Peritoneal Ambulatorial Contínua , Peritônio/metabolismo , Albumina Sérica/análise , Adulto , Transporte Biológico , Feminino , Humanos , Falência Renal Crônica/metabolismo , Falência Renal Crônica/terapia , Masculino , Pessoa de Meia-IdadeRESUMO
Se estudió la influencia de la edad materna, factores nutricionales y hormonales que pudieran explicar la mayor prevalencia de retraso de talla detectado en hijos de madres adolescentes de nivel socioeconómico medio bajo. Se encontró que sólo los lactantes con retraso de talla, hijos de adolescentes, tenían significativo retraso de la maduración ósea con respecto a la edad cronológica (14,8 +-4,1 vs 18,2+-2,2 meses respectivamente). El conjunto de lactantes con retraso de talla tenía concentraciones de Zn (85,7+-13,3 vs 94,6+-17,9 ug/dl), Cu (106,2+-32,5 vs 122,0+-31,8 ug/dl) y Hb (11,7+-2,1 vs 12,8+-2,1 ug/dl) significativamente menores que el grupo con talla adecuada. Sin embargo, no se enciontraron diferencias en estos parámetros de acuerdo a la edad materna. No hubio disparidad en las concentraciones plasmáticas de hormonas tiroideas, tirotropina y en la respuesta de hormona de crecimniento al estímulo con L-Dopa. Pensamos que la etiología del retraso de talla de los hijos de adolescentes y adultas es similar. Es posible que la mayor prevalencia del retraso de talla en hijos de adolescentes se deba a una mayor frecuencia o a un impacto mas intenso de los factores ambientales analizados. De todo lo anterior se desprende la importancia de una especial preocupación por estas últimas madres que constituyen un grupo con riesgo de alteraciones del crecimiento y desarrollo en sus hijos