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1.
Mycoses ; 67(4): e13719, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38551063

RESUMO

BACKGROUND: Surveillance studies are crucial for updating trends in Aspergillus species and antifungal susceptibility information. OBJECTIVES: Determine the Aspergillus species distribution and azole resistance prevalence during this 3-year prospective surveillance study in a Spanish hospital. MATERIALS AND METHODS: Three hundred thirty-five Aspergillus spp. clinical and environmental isolates were collected during a 3-year study. All isolates were screened for azole resistance using an agar-based screening method and resistance was confirmed by EUCAST antifungal susceptibility testing. The azole resistance mechanism was confirmed by sequencing the cyp51A gene and its promoter. All Aspergillus fumigatus strains were genotyped using TRESPERG analysis. RESULTS: Aspergillus fumigatus was the predominant species recovered with a total of 174 strains (51.94%). The rest of Aspergillus spp. were less frequent: Aspergillus niger (14.93%), Aspergillus terreus (9.55%), Aspergillus flavus (8.36%), Aspergillus nidulans (5.37%) and Aspergillus lentulus (3.28%), among other Aspergillus species (6.57%). TRESPERG analysis showed 99 different genotypes, with 72.73% of the strains being represented as a single genotype. Some genotypes were common among clinical and environmental A. fumigatus azole-susceptible strains, even when isolated months apart. We describe the occurrence of two azole-resistant A. fumigatus strains, one clinical and another environmental, that were genotypically different and did not share genotypes with any of the azole-susceptible strains. CONCLUSIONS: Aspergillus fumigatus strains showed a very diverse population although several genotypes were shared among clinical and environmental strains. The isolation of azole-resistant strains from both settings suggest that an efficient analysis of clinical and environmental sources must be done to detect azole resistance in A. fumigatus.


Assuntos
Aspergilose , Aspergillus nidulans , Humanos , Azóis/farmacologia , Antifúngicos/farmacologia , Antifúngicos/uso terapêutico , Aspergilose/microbiologia , Prevalência , Estudos Prospectivos , Farmacorresistência Fúngica , Aspergillus fumigatus , Hospitais , Proteínas Fúngicas/genética , Testes de Sensibilidade Microbiana
2.
J Neurooncol ; 161(1): 165-174, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36525166

RESUMO

PURPOSE: Astrocytomas are a type of malignant brain tumor with an unfavorable clinical course. The impact of AGT and MGMT somatic variants in the prognosis of astrocytoma is unknown, and it is controversial for TP53. Moreover, there is a lack of knowledge regarding the molecular characteristics of astrocytomas in Mexican patients. METHODS: We studied 48 Mexican patients, men and women, with astrocytoma (discovery cohort). We performed DNA deep sequencing in tumor samples, targeting AGT, MGMT and TP53, and we studied MGMT gene promoter methylation status. Then we compared our findings to a cohort which included data from patients with astrocytoma from The Cancer Genome Atlas (validation cohort). RESULTS: In the discovery cohort, we found a higher number of somatic variants in AGT and MGMT than in the validation cohort (10.4% vs < 1%, p < 0.001), and, in both cohorts, we observed only women carried variants AGT variants. We also found that the presence of either MGMT variant or promoter methylation was associated to better survival and response to chemotherapy, and, in conjunction with TP53 variants, to progression-free survival. CONCLUSIONS: The occurrence of AGT variants only in women expands our knowledge about the molecular differences in astrocytoma between men and women. The increased prevalence of AGT and MGMT variants in the discovery cohort also points towards possible distinctions in the molecular landscape of astrocytoma among populations. Our findings warrant further study.


Assuntos
Astrocitoma , Neoplasias Encefálicas , Feminino , Humanos , Masculino , Astrocitoma/patologia , Biomarcadores , Neoplasias Encefálicas/patologia , DNA/uso terapêutico , Metilação de DNA , Metilases de Modificação do DNA/genética , Enzimas Reparadoras do DNA/genética , Mutação , Prognóstico , Análise de Sequência de DNA , Proteína Supressora de Tumor p53/genética , Proteínas Supressoras de Tumor/genética
3.
Mycoses ; 65(2): 178-185, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34806786

RESUMO

Antifungal susceptibility testing is an essential tool for guiding antifungal therapy. Reference methods are complex and usually only available in specialised laboratories. We have designed an expanded agar-based screening method for the detection of azole-resistant Aspergillus fumigatus isolates. Normally, identification of resistance mechanisms is obtained only after sequencing the cyp51A gene and promoter. However, our screening method provides azole resistance detection and presumptive resistance mechanisms identification. A previous agar-based method consisting of four wells containing voriconazole, itraconazole, posaconazole and a growth control, detected azole resistance to clinical azoles. Here, we have modified the concentrations of voriconazole and posaconazole to adapt to the updated EUCAST breakpoints against A. fumigatus. We have also expanded the method to include environmental azoles to assess azole resistance and the azole resistance mechanism involved. We used a collection of A. fumigatus including 54 azole-resistant isolates with Cyp51A modifications (G54, M220, G448S, TR53 , TR34 /L98H, TR46 /Y121F/T289A, TR34 /L98H/S297T/F495I), and 50 azole susceptible isolates with wild-type Cyp51A. The screening method detects azole-resistant A. fumigatus isolates when there is growth in any of the azole-containing wells after 48h. The growth pattern in the seven azoles tested helps determine the underlying azole resistance mechanism. This approach is designed for surveillance screening of A. fumigatus azole-resistant isolates and can be useful for the clinical management of patients prior to antifungal susceptibility testing confirmation.


Assuntos
Antifúngicos , Aspergillus fumigatus , Azóis , Farmacorresistência Fúngica , Ágar , Antifúngicos/farmacologia , Aspergillus fumigatus/efeitos dos fármacos , Aspergillus fumigatus/genética , Azóis/farmacologia , Farmacorresistência Fúngica/efeitos dos fármacos , Proteínas Fúngicas/genética , Testes de Sensibilidade Microbiana , Voriconazol/farmacologia
4.
Appl Environ Microbiol ; 87(5)2021 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-33355104

RESUMO

Drug resistance poses a serious threat to human health and agricultural production. Azole drugs are the largest group of 14-α sterol demethylation inhibitor fungicides that are used both in agriculture and in clinical practice. As plant pathogenic molds share their natural environment with fungi that cause opportunistic infections in humans, both are exposed to a strong and persistent pressure of demethylase inhibitor (DMI) fungicides, including imidazole and triazole drugs. As a result, a loss of efficacy has occurred for this drug class in several species. In the clinical setting, Aspergillus fumigatus azole resistance is a growing public health problem and finding the source of this resistance has gained much attention. It is urgent to determine if there is a direct link between the agricultural use of azole compounds and the different A. fumigatus resistance mechanisms described for clinical triazoles. In this work we have performed A. fumigatus susceptibility testing to clinical triazoles and crop protection DMIs using a collection of azole susceptible and resistant strains which harbor most of the described azole resistance mechanisms. Various DMI susceptibility profiles have been found in the different A. fumigatus populations groups based on their azole resistance mechanism and previous WGS analysis, which suggests that the different resistance mechanisms have different origins and are specifically associated to the local use of a particular DMI.Importance Due to the worldwide emergence of A. fumigatus azole resistance, this opportunistic pathogen poses a serious health threat and, therefore, it has been included in the Watch List of the CDC 2019 Antimicrobial Resistance Threats Report. Azoles play a critical role in the control and management of fungal diseases, not only in the clinical setting but also in agriculture. Thus, azole resistance leads to a limited therapeutic arsenal which reduces the treatment options for aspergillosis patients, increasing their mortality risk. Evidence is needed to understand whether A. fumigatus azole resistance is emerging from an agricultural source due to the extended use of demethylase inhibitors as fungicides, or whether it is coming from somewhere else such as the clinical setting. If the environmental route is demonstrated, the current use and management of azole antifungal compounds might be forced to change in the forthcoming years.

5.
Physiol Plant ; 173(4): 2238-2247, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34590721

RESUMO

Phytochromes are red-light photoreceptors that play an important role in regulating many responses of plants, including its nutritional control. Nutrient deficiency in plants has become a constraint for agricultural production; thus, we investigated the role of phytochromes B1 and B2 in the nutritional, physiological, and growth changes of the control genotype (WT) and both phyB1 and phyB2 tomato mutants (deficient in phyB1 and phyB2) under nutritional sufficiency and individual deficiency of N, P, and K. Under complete solution, the plants of phyB1 and phyB2 had a decreased N, P, and K accumulation compared with WT and consequently a reduced content of chlorophyll and carotenoids, and dry weight production. In the condition of N deficiency, phyB1 had decreased N absorption, pigments concentration, and plant dry weight, while increased oxidative stress of membranes (MDA content). Similarly, phyB2 also had reduced N absorption. The deficiency of phyB1 mitigated the effects of P deficiency as phyB1 mutant had improved nutritional and physiological responses, increasing plant dry weight production. In contrast, phyB2 reduced N accumulation, quantum efficiency of photosystem II (Fv/Fm), and the concentration of pigments, while it increased MDA. Under K deficiency, phyB1 displayed a reduced P accumulation, as well as the total concentration of chlorophylls and carotenoids and K use efficiency. An increased concentration of MDA was found in phyB2 plants, as well as a reduction in chlorophylls concentration and in the use efficiency of K. Together, these results indicate a new perspective on the control of phytochromes in the nutrition of tomato plants under nutritional stress.


Assuntos
Fitocromo , Solanum lycopersicum , Carotenoides , Clorofila , Luz , Solanum lycopersicum/genética
6.
Childs Nerv Syst ; 37(5): 1669-1676, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-33452617

RESUMO

PURPOSE: Studies have examined the impact of fusion of the sagittal suture in the skull base while others have evaluated the growth of the skull base before and after surgery. This study aims to perform the anthropometric measures of the skull base in children with scaphocephaly to evaluate the influence of surgical repair in the remodeling of the skull base and anthropometric measures. METHODS: Twenty-one children with diagnosis of scaphocephaly were operated between April 2007 and October 2008, and anthropometric measures at the skull base were performed before and after a year of surgery. The measures were the cranial index (CI), distance between the crista galli and tuberculum sellar (CG-TS), distance between the crista galli and the internal auditory meatus (CG-IAM), distance between the oval foramen (OF-OF), distance between the internal auditory meatus (IAM-IAM), the angle of the skull base (Â1), and the angle between the nasion, center of sella, and basion (Â2). RESULTS: There was a normalization of the CI in all children, confirming an appropriate cranial remodeling. The CG-TS measure evaluated the anterior skull base, with proportional growth of 12.5%. The mediolateral growth was observed by the increase of OF-OF measures by 8.5% and IAM-IAM by 9.5%. The CG-TS measure grew by 7.2%. There was no statistical difference in the angles analyzed. CONCLUSION: Surgical treatment of scaphocephaly led to remodeling of the skull base, confirmed by the changes of anthropometric measures taken before and after a year of surgery.


Assuntos
Craniossinostoses , Criança , Suturas Cranianas/cirurgia , Craniossinostoses/cirurgia , Osso Etmoide , Ossos Faciais , Humanos , Lactente , Crânio , Base do Crânio/cirurgia
7.
Molecules ; 26(19)2021 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-34641518

RESUMO

Invasive aspergillosis, mainly caused by Aspergillus fumigatus, can lead to severe clinical outcomes in immunocompromised individuals. Antifungal treatment, based on the use of azoles, is crucial to increase survival rates. However, the recent emergence of azole-resistant A. fumigatus isolates is affecting the efficacy of the clinical therapy and lowering the success rate of azole strategies against aspergillosis. Azole resistance mechanisms described to date are mainly associated with mutations in the azole target gene cyp51A that entail structural changes in Cyp51A or overexpression of the gene. However, strains lacking cyp51A modifications but resistant to clinical azoles have recently been detected. Some genes have been proposed as new players in azole resistance. In this study, the gene hmg1, recently related to azole resistance, and its paralogue hmg2 were studied in a collection of fifteen azole-resistant strains without cyp51A modifications. Both genes encode HMG-CoA reductases and are involved in the ergosterol biosynthesis. Several mutations located in the sterol sensing domain (SSD) of Hmg1 (D242Y, G307D/S, P309L, K319Q, Y368H, F390L and I412T) and Hmg2 (I235S, V303A, I312S, I360F and V397C) were detected. The role of these mutations in conferring azole resistance is discussed in this work.


Assuntos
Antifúngicos/farmacologia , Aspergillus fumigatus/efeitos dos fármacos , Farmacorresistência Fúngica/genética , Proteínas Fúngicas/genética , Hidroximetilglutaril-CoA Redutases/genética , Antifúngicos/química , Aspergilose/microbiologia , Aspergillus fumigatus/genética , Aspergillus fumigatus/isolamento & purificação , Azóis/química , Sistema Enzimático do Citocromo P-450/genética , Farmacorresistência Fúngica/efeitos dos fármacos , Proteínas Fúngicas/química , Regulação Fúngica da Expressão Gênica/efeitos dos fármacos , Humanos , Hidroximetilglutaril-CoA Redutases/química , Testes de Sensibilidade Microbiana , Mutação Puntual , Regiões Promotoras Genéticas , Sequenciamento Completo do Genoma
8.
Artigo em Inglês | MEDLINE | ID: mdl-31988099

RESUMO

Amphotericin B (AmB) is the antifungal with the strongest fungicidal activity, but its use has several limitations, mainly associated with its toxicity. Although some lipidic and liposomal formulations that present reduced toxicity are available, their price limits their application in developing countries. Flucytosine (5FC) has shown synergistic effect with AmB for treatment of some fungal infections, such as cryptococcosis, but again, its price is a limitation for its use in many regions. In the present work, we aimed to identify new drugs that have a minor effect on Cryptococcus neoformans, reducing its growth in the presence of subinhibitory concentrations of AmB. In the initial screening, we found fourteen drugs that had this pattern. Later, checkerboard assays of selected compounds, such as erythromycin, riluzole, nortriptyline, chenodiol, nisoldipine, promazine, chlorcyclizine, cloperastine, and glimepiride, were performed and all of them confirmed for their synergistic effect (fractional inhibitory concentration index [FICI] < 0.5). Additionally, toxicity of these drugs in combination with AmB was tested in mammalian cells and in zebrafish embryos. Harmless compounds, such as the antibiotic erythromycin, were found to have synergic activity with AmB, not only against C. neoformans but also against some Candida spp., in particular against Candida albicans In parallel, we identified drugs that had antifungal activity against C. neoformans and found 43 drugs that completely inhibited the growth of this fungus, such as ciclopirox and auranofin. Our results expand our knowledge about antifungal compounds and open new perspectives in the treatment of invasive mycosis based on repurposing off-patent drugs.


Assuntos
Anfotericina B/farmacologia , Antifúngicos/farmacologia , Candida albicans/efeitos dos fármacos , Cryptococcus neoformans/efeitos dos fármacos , Reposicionamento de Medicamentos , Animais , Auranofina/farmacologia , Candidíase/tratamento farmacológico , Linhagem Celular , Ciclopirox/farmacologia , Criptococose/tratamento farmacológico , Avaliação Pré-Clínica de Medicamentos/métodos , Sinergismo Farmacológico , Eritromicina/farmacologia , Flucitosina/farmacologia , Humanos , Camundongos , Testes de Sensibilidade Microbiana , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/microbiologia , Células RAW 264.7 , Peixe-Zebra/embriologia
9.
Artigo em Inglês | MEDLINE | ID: mdl-31285229

RESUMO

Antifungal resistance is one of the major causes of the increasing mortality rates for fungal infections, especially for those caused by Aspergillus spp. A surveillance program was established in 2014 in the Spanish National Center for Microbiology for tracking resistance in the most prevalent Aspergillus species. A total of 273 samples were included in the study and were initially classified as susceptible or resistant according to EUCAST breakpoints. Several Aspergillus cryptic species were found within the molecularly identified isolates. Cyp51 mutations were characterized for Aspergillus fumigatus, Aspergillus terreus, and Aspergillus flavussensu stricto strains that were classified as resistant. Three A. fumigatus sensu stricto strains carried the TR34/L98H resistance mechanism, while two harbored G54R substitution and one harbored the TR46/Y121F/T289A mechanism. Seventeen strains had no mutations in cyp51A, with ten of them resistant only to isavuconazole. Three A. terreussensu stricto strains harbored D344N substitution in cyp51A, one of them combined with M217I, and another carried an A249G novel mutation. Itraconazole-resistant A. flavussensu stricto strains harbored P220L and H349R alterations in cyp51A and cyp51C, respectively, that need further investigation on their implication in azole resistance.


Assuntos
Antifúngicos/farmacologia , Aspergillus flavus/genética , Aspergillus fumigatus/genética , Aspergillus/genética , Sistema Enzimático do Citocromo P-450/genética , Farmacorresistência Fúngica/genética , Proteínas Fúngicas/genética , Substituição de Aminoácidos , Aspergilose/tratamento farmacológico , Aspergilose/epidemiologia , Aspergilose/microbiologia , Aspergillus/efeitos dos fármacos , Aspergillus/enzimologia , Aspergillus flavus/efeitos dos fármacos , Aspergillus flavus/enzimologia , Aspergillus fumigatus/efeitos dos fármacos , Aspergillus fumigatus/enzimologia , Expressão Gênica , Itraconazol/farmacologia , Testes de Sensibilidade Microbiana , Mutação , Nitrilas/farmacologia , Vigilância em Saúde Pública , Piridinas/farmacologia , Espanha/epidemiologia , Triazóis/farmacologia , Voriconazol/farmacologia
11.
Childs Nerv Syst ; 34(1): 73-78, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-29127595

RESUMO

INTRODUCTION: In 2015, it was observed a rise in the number of microcephalic newborns associated with a history of non-specific febrile sickness and rash during pregnancy in Brazil. Since then, microcephaly has emerged as a public health concern. A few months after, the causal relation between congenital microcephaly and the Zika virus was discovered. Zika virus, an arbovirus, is a new TORCH member that leads to congenital infection through vertical transmission and harms the developing brain, disrupting synaptogenesis, and causing other central nervous system lesions. OBJECTIVE: The purpose of this article is to report the congenital Zika syndrome (CZS) and to emphasize the need for follow-up of the affected children to better know the evolutionary history of this new agent and to optimize the provision of healthcare and improve the quality of life of these patients. METHODS: We review the most relevant literature about clinical manifestations and neuroimaging findings related to neurotropism of Zika virus to characterize the congenital Zika syndrome and suggest the systematization of some exams and procedures to evaluate children exposed to ZIKV with or without microcephaly, according to the author's own experience. CONCLUSIONS: Vertical ZIKV infection can cause a wide spectrum of neurological manifestations that go beyond microcephaly, and even the non-microcephalic child should be followed during the first years of life, because infection may be asymptomatic or lead to neuropsicomotor delay, epilepsy, and visual abnormalities. The appropriate prospective multidisciplinary follow-up of these patients aims to understand the natural history of this new agent and to provide a better development and quality of life for them and their families.


Assuntos
Doenças do Sistema Nervoso/congênito , Infecção por Zika virus/congênito , Adulto , Brasil , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Microcefalia/etiologia , Doenças do Sistema Nervoso/etiologia , Doenças do Sistema Nervoso/patologia , Doenças do Sistema Nervoso/psicologia , Gravidez , Complicações Infecciosas na Gravidez , Infecção por Zika virus/patologia , Infecção por Zika virus/psicologia
12.
J Fungi (Basel) ; 10(3)2024 Mar 12.
Artigo em Inglês | MEDLINE | ID: mdl-38535218

RESUMO

One of the systems responsible for the recognition and repair of mistakes occurring during cell replication is the DNA mismatch repair (MMR) system. Two major protein complexes constitute the MMR pathway: MutS and MutL. Here, we investigated the possible relation of four A. fumigatus MMR genes (msh2, msh6, pms1, and mlh1) with the development of azole resistance related to the phenomenon of multi-drug resistance. We examined the MMR gene variations in 163 Aspergillus fumigatus genomes. Our analysis showed that genes msh2, pms1, and mlh1 have low genetic variability and do not seem to correlate with drug resistance. In contrast, there is a nonsynonymous mutation (G240A) in the msh6 gene that is harbored by 42% of the strains, most of them also harboring the TR34/L98H azole resistance mechanism in cyp51A. The msh6 gene was deleted in the akuBKU80A. fumigatus strain, and the ∆msh6 isolates were analyzed for fitness, azole susceptibility, and virulence capacity, showing no differences compared with the akuBKU80 parental strain. Wild-type msh6 and Δmsh6 strains were grown on high concentrations of azole and other non-azole fungicides used in crop protection. A 10- and 2-fold higher mutation frequency in genes that confer resistance to boscalid and benomyl, respectively, were observed in Δmsh6 strains compared to the wild-type. This study suggests a link between Msh6 and fungicide resistance acquisition.

13.
Int J Biol Macromol ; 257(Pt 1): 128374, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38052289

RESUMO

Cactus pear cladodes, clones 'Miúda' (MIU) and 'Orelha de Elefante Mexicana' (OEM) were harvested at 6 am and 8 pm during the rainy-dry, dry and rainy seasons to evaluate the effect of type of clone and harvest seasons on the physicochemical and technological properties of mucilage as well as the optical, physicochemical, mechanical, thermal and microstructural characteristics of the films obtained. The mucilage of the OEM clone presented a higher content of phenolic compounds, compared to the Nopalea genus, regardless of the season and time of harvest. Furthermore, the dry period resulted in higher carbohydrate levels, regardless of the harvest time. The biopolymeric films produced from the OEM clone harvested in the rainy season and rainy-dry transition showed darker color, better mechanical properties, water barrier, compact microstructure and thermal stability when compared to the MIU clone. Furthermore, harvesting at 6 am provided improvements in the mechanical conditions, permeability and thermal stability of the films of both types of clones studied. These results showed strong environmental modulation, naturally incorporating important macromolecules such as carbohydrates and phenolic compounds, used in the industry in the production of nutraceutical foods, into the mucilage. Furthermore, harvesting cladodes at 6 am in the rainy and transitional (rainy-dry) periods provided better quality biopolymeric films and/or coatings.


Assuntos
Opuntia , Opuntia/química , Estações do Ano , Polissacarídeos , Carboidratos , Água
14.
Int J Biostat ; 19(2): 389-415, 2023 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-36279154

RESUMO

Many health care professionals and institutions manage longitudinal databases, involving follow-ups for different patients over time. Longitudinal data frequently manifest additional complexities such as high variability, correlated measurements and missing data. Mixed effects models have been widely used to overcome these difficulties. This work proposes the use of linear mixed effects models as a tool that allows to search conceptually different types of anomalies in the data simultaneously.


Assuntos
Gerenciamento de Dados , Humanos , Estudos Longitudinais , Modelos Lineares , Bases de Dados Factuais
15.
EJIFCC ; 34(3): 228-244, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37868088

RESUMO

Background: Analyzing longitudinal gene expression data is extremely challenging due to limited prior information, high dimensionality, and heterogeneity. Similar difficulties arise in research of multifactorial diseases such as Type 2 Diabetes. Clustering methods can be applied to automatically group similar observations. Common clinical values within the resulting groups suggest potential associations. However, applying traditional clustering methods to gene expression over time fails to capture variations in the response. Therefore, shape-based clustering could be applied to identify patient groups by gene expression variation in a large time metabolic compensatory intervention. Objectives: To search for clinical grouping patterns between subjects that showed similar structure in the variation of IL-1ß gene expression over time. Methods: A new approach for shape-based clustering by IL-1ß expression behavior was applied to a real longitudinal database of Type 2 Diabetes patients. In order to capture correctly variations in the response, we applied traditional clustering methods to slopes between measurements. Results: In this setting, the application of K-Medoids using the Manhattan distance yielded the best results for the corresponding database. Among the resulting groups, one of the clusters presented significant differences in many key clinical values regarding the metabolic syndrome in comparison to the rest of the data. Conclusions: The proposed method can be used to group patients according to variation patterns in gene expression (or other applications) and thus, provide clinical insights even when there is no previous knowledge on the subject clinical profile and few timepoints for each individual.

16.
BMC Emerg Med ; 11: 10, 2011 Jul 27.
Artigo em Inglês | MEDLINE | ID: mdl-21794133

RESUMO

BACKGROUND: Spontaneous spinal epidural hematoma is a relatively rare but potentially disabling disease. Prompt timely surgical management may promote recovery even in severe cases. CASE PRESENTATION: We report a 34-year-old man with a 2-hour history of sudden severe back pain, followed by weakness and numbness over the bilateral lower limbs, progressing to intense paraparesis and anesthesia. A spinal magnetic resonance imaging scan was performed and revealed an anterior epidural hematoma of the thoracic spine. He underwent an emergency decompression laminectomy of the thoracic spine and hematoma evacuation. Just after surgery, his lower extremity movements improved. After 1 week, there was no residual weakness and ambulation without assistance was resumed, with residual paresthesia on the plantar face of both feet. After 5 months, no residual symptoms persisted. CONCLUSIONS: The diagnosis of spontaneous spinal epidural hematoma must be kept in mind in cases of sudden back pain with symptoms of spinal cord compression. Early recognition, accurate diagnosis and prompt surgical treatment may result in significant improvement even in severe cases.


Assuntos
Hematoma Epidural Espinal/diagnóstico , Paraparesia/diagnóstico , Doença Aguda , Adulto , Diagnóstico Diferencial , Hematoma Epidural Espinal/complicações , Hematoma Epidural Espinal/patologia , Hematoma Epidural Espinal/cirurgia , Humanos , Laminectomia , Imageamento por Ressonância Magnética , Masculino , Paraparesia/etiologia , Vértebras Torácicas
17.
J Fungi (Basel) ; 7(1)2021 Jan 02.
Artigo em Inglês | MEDLINE | ID: mdl-33401764

RESUMO

Azole-resistant Aspergillus fumigatus is an emerging worldwide problem with increasing reports of therapy failure cases produced by resistant isolates. A case of azole-resistant A. fumigatus hospital colonization in a patient is reported here. Investigations of the hospital environment led to the recovery of A. fumigatus strains harboring the TR34/L98H and the G448S Cyp51A azole resistance mechanisms. Isolate genotyping showed that one strain from the environment was isogenic with the patient strains. These are the first environmental A. fumigatus azole resistant strains collected in a hospital in Spain; it supports the idea of the hospital environment as a source of dissemination and colonization/infection by azole resistant A. fumigatus in patients. The isolation of an azole-resistant strain from an azole-naïve patient is an interesting finding, suggesting that an effective analysis of clinical and environmental sources must be done to detect azole resistance in A. fumigatus. The emergence and spread of these resistance mechanisms in A. fumigatus is of major concern because it confers high resistance to voriconazole and is associated with treatment failure in patients with invasive aspergillosis.

18.
Plant Sci ; 303: 110763, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33487348

RESUMO

Although the blue light photoreceptors cryptochromes mediate the expression of genes related to reactive oxygen species, whether cryptochrome 1a (cry1a) regulates local and long-distance signaling of water deficit in tomato (Solanum lycopersicum L.) is unknown. Thus the cry1a tomato mutant and its wild-type (WT) were reciprocally grafted (WT/WT; cry1a/cry1a; WT/cry1a; cry1a/WT; as scion/rootstock) or grown on their own roots (WT and cry1a) under irrigated and water deficit conditions. Plant growth, pigmentation, oxidative stress, water relations, stomatal characteristics and leaf gas exchange were measured. WT and cry1a plants grew similarly under irrigated conditions, whereas cry1a plants had less root biomass and length and higher tissue malondialdehyde concentrations under water deficit. Despite greater oxidative stress, cry1a maintained chlorophyll and carotenoid concentrations in drying soil. Lower stomatal density of cry1a likely increased its leaf relative water content (RWC). In grafted plants, scion genotype largely determined shoot and root biomass accumulation irrespective of water deficit. In chimeric plants grown in drying soil, cry1a rootstocks increased RWC while WT rootstocks maintained photosynthesis of cry1a scions. Manipulating tomato CRY1a may enhance plant drought tolerance by altering leaf pigmentation and gas exchange during soil drying via local and long-distance effects.


Assuntos
Criptocromos/fisiologia , Proteínas de Plantas/fisiologia , Solanum lycopersicum/fisiologia , Criptocromos/metabolismo , Desidratação , Peróxido de Hidrogênio/metabolismo , Peroxidação de Lipídeos , Solanum lycopersicum/metabolismo , Folhas de Planta/fisiologia , Proteínas de Plantas/metabolismo , Raízes de Plantas/fisiologia , Estômatos de Plantas/fisiologia , Transpiração Vegetal/fisiologia , Solo , Água/metabolismo
19.
J Plant Physiol ; 258-259: 153374, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33626482

RESUMO

The participation of plant cryptochromes in water deficit response mechanisms has been highlighted in several reports. However, the role of tomato (Solanum lycopersicum L.) cryptochrome 1a (cry1a) in the blue light fluence-dependent modulation of the water deficit response remains largely elusive. The tomato cry1a mutant and its wild-type counterpart were grown in water (no stress) or PEG6000 (osmotic stress) treatments under white light (60 µmol m-2 s-1) or from low to high blue light fluence (1, 5, 10, 15 and 25 µmol m-2 s-1). We first demonstrate that under nonstress conditions cry1a regulates seedling growth by mechanisms that involve pigmentation, lipid peroxidation and osmoprotectant accumulation in a blue light-dependent manner. In addition, we further highlighted under osmotic stress conditions that cry1a increased tomato growth by reduced malondialdehyde (MDA) and proline accumulation. Although blue light is an environmental signal that influences osmotic stress responses mediated by tomato cry1a, specific blue light fluence rates are required during these responses. Here, we show that CRY1a manipulation may be a potential biotechnological target to develop a drought-tolerant tomato variety. Nevertheless, the complete understanding of this phenomenon requires further investigation.


Assuntos
Criptocromos/metabolismo , Osmorregulação/genética , Pressão Osmótica , Proteínas de Plantas/metabolismo , Solanum lycopersicum/fisiologia , Luz , Solanum lycopersicum/genética
20.
Rev Assoc Med Bras (1992) ; 67(3): 366-372, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34468599

RESUMO

OBJECTIVE: To analyze the prevalence and factors associated with professional recommendation and leisure-time physical activity (LTPA) in Brazilian individuals diagnosed with hypertension (HBP), diabetes, and/or hypercholesterolemia. METHODS: This is a cross-sectional population-based study with a representative sample of the Brazilian population (aged ≥20 years) in 2013, with self-reported HBP (n=11.098), diabetes (n=3.176), and/or hypercholesterolemia (n=7.252). Prevalence and gross odds ratios were estimated and adjusted for both outcomes. RESULTS: Professional recommendation and LTPA were more prevalent in individuals who received recommendation and presented with hypercholesterolemia (85.9 and 23.4%, respectively). Adjusted analysis showed an association in people 40 to 59 years of age and public programs in most diseases. Higher educational level was associated with receiving recommendations in all non-communicable diseases (NCDs). LTPA was associated in people 40 to 59 years of age for HBP and diabetes and in all investigated NCDs, higher educational level, positive perception of health, and a favorable environment in those who received recommendation. CONCLUSIONS: Education presented the greatest magnitude in the associations, clearly showing the need for equitable methods to increase recommendation and LTPA levels for the most vulnerable population. Further studies analyzing other variables and NCD are needed, corroborating the Ministry of Health.


Assuntos
Exercício Físico , Hipertensão , Brasil/epidemiologia , Doença Crônica , Estudos Transversais , Humanos , Hipertensão/epidemiologia , Atividades de Lazer
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