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1.
Retina ; 43(9): 1557-1562, 2023 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-37253246

RESUMEN

PURPOSE: To describe photoreceptor damage in patients with Terson syndrome as a potential cause for inconsistent clinical outcomes. METHODS: Clinical evaluation and retinal imaging in six patients. RESULTS: Four patients were women and two men, with an average age of 46.8 years (SD 8.9). Four patients suffered aneurysmal subarachnoid hemorrhage, one vertebral artery dissection, and one superior sagittal sinus thrombosis. In 11 eyes, a consistent pattern of outer retinal changes within the central retina affecting the ellipsoid zone and the outer nuclear layer was observed, indicating photoreceptor damage. Areas of photoreceptor damage showed poor spatial correlation with intraocular hemorrhage, particularly subinternal limiting membrane hemorrhage. The observed retinal abnormalities demonstrated incomplete recovery over long-term follow-up 3.5 to 8 years posthemorrhage, irrespective of surgical or conservative treatment strategy, and had variable impact on the patients' visual function. CONCLUSION: The observations suggest that photoreceptor damage in Terson syndrome likely represents a distinct manifestation of this condition, which could be caused by transient ischemia of the outer retina secondary to acute rise in intracranial pressure.


Asunto(s)
Mácula Lútea , Hemorragia Subaracnoidea , Masculino , Humanos , Femenino , Persona de Mediana Edad , Hemorragia Vítrea/etiología , Hemorragia Vítrea/complicaciones , Retina , Hemorragia Subaracnoidea/complicaciones , Hemorragia Subaracnoidea/diagnóstico , Agudeza Visual , Tomografía de Coherencia Óptica/métodos
2.
Hum Mutat ; 43(10): 1472-1489, 2022 10.
Artículo en Inglés | MEDLINE | ID: mdl-35815345

RESUMEN

Aminoacyl-tRNA synthetases (ARSs) are essential enzymes for faithful assignment of amino acids to their cognate tRNA. Variants in ARS genes are frequently associated with clinically heterogeneous phenotypes in humans and follow both autosomal dominant or recessive inheritance patterns in many instances. Variants in tryptophanyl-tRNA synthetase 1 (WARS1) cause autosomal dominantly inherited distal hereditary motor neuropathy and Charcot-Marie-Tooth disease. Presently, only one family with biallelic WARS1 variants has been described. We present three affected individuals from two families with biallelic variants (p.Met1? and p.(Asp419Asn)) in WARS1, showing varying severities of developmental delay and intellectual disability. Hearing impairment and microcephaly, as well as abnormalities of the brain, skeletal system, movement/gait, and behavior were variable features. Phenotyping of knocked down wars-1 in a Caenorhabditis elegans model showed depletion is associated with defects in germ cell development. A wars1 knockout vertebrate model recapitulates the human clinical phenotypes, confirms variant pathogenicity, and uncovers evidence implicating the p.Met1? variant as potentially impacting an exon critical for normal hearing. Together, our findings provide consolidating evidence for biallelic disruption of WARS1 as causal for an autosomal recessive neurodevelopmental syndrome and present a vertebrate model that recapitulates key phenotypes observed in patients.


Asunto(s)
Aminoacil-ARNt Sintetasas , Enfermedad de Charcot-Marie-Tooth , Triptófano-ARNt Ligasa , Aminoacil-ARNt Sintetasas/genética , Enfermedad de Charcot-Marie-Tooth/genética , Exones , Humanos , Mutación , Linaje , ARN de Transferencia/genética , Síndrome , Triptófano-ARNt Ligasa/genética
3.
Mol Biol Rep ; 49(12): 11469-11479, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36006503

RESUMEN

BACKGROUND: The exploration of genetic diversity is the key source of germplasm conservation and potential to broaden its genetic base. The globally growing demand for chickpea suggests superior/climate-resilient varieties, which in turn necessitates the germplasm characterization to unravel underlying genetic variation. METHODOLOGY AND RESULTS: A chickpea core collection comprising of diverse 192 accessions which include cultivated Cicer arietinum, and wild C. reticulatum, C. echinospermum, and C. microphyllum species were investigated to analyze their genetic diversity and relationship, by assaying 33 unlinked simple sequence repeat (SSR) markers. The results amplified a total of 323 alleles (Na), ranging from 2 to 8 with an average of 4.25 alleles per locus. Expected heterozygosity (He) differed from 0.46 to 0.86 with an average of 0.68. Polymorphic information content (PIC) ranged from 0.73 to 0.98 with an average of 0.89. Analysis of molecular variance (AMOVA) showed that most of the variation was among individuals (87%). Cluster analysis resulted in the formation of four distinct clusters. Cluster I represented all cultivated and clusters II, III, and IV comprised a heterogeneous group of cultivated and wild chickpea accessions. CONCLUSION: We report considerable diversity and greater resolving power of SSR markers for assessing variability and interrelationship among the chickpea accessions. The chickpea core is expected to be an efficient resource for breeders for broadening the chickpea genetic base and could be useful for selective breeding of desirable traits and in the identification of target genes for genomics-assisted breeding.


Asunto(s)
Cicer , Biomarcadores , Cicer/genética , Variación Genética/genética , Repeticiones de Microsatélite/genética , Filogenia , Fitomejoramiento
4.
Clin Infect Dis ; 73(9): e2746-e2753, 2021 11 02.
Artículo en Inglés | MEDLINE | ID: mdl-32818956

RESUMEN

BACKGROUND: Coccidioidomycosis (CM) is a common cause of community-acquired pneumonia where CM is endemic. Manifestations include self-limited pulmonary infection, chronic fibrocavitary pulmonary disease, and disseminated coccidioidomycosis. Most infections are identified by serological assays including enzyme-linked immunoassay (EIA), complement fixation, and immunodiffusion. These are time-consuming and take days to result, impeding early diagnosis. A new lateral flow assay (LFA; Sona; IMMY, Norman, OK) improves time-to-result to 1 hour. METHODS: We prospectively enrolled 392 patients with suspected CM, compared the LFA with standard EIA and included procalcitonin evaluation. RESULTS: Compared with standard EIA, LFA demonstrates 31% sensitivity (95% confidence interval [CI], 20-44%) and 92% specificity (95% CI, 88-95%). Acute pulmonary disease (74%) was the most common clinical syndrome. Hospitalized patients constituted 75% of subjects, and compared with outpatients, they more frequently had ≥3 previous healthcare facility visits (P = .05), received antibacterials (P < .01), and had >3 antibacterial courses (P < .01). Procalcitonin (PCT) was <0.25 ng/mL in 52 (83%) EIA-positive patients, suggesting infection was not bacterial. CONCLUSIONS: When CM is a possible diagnosis, LFA identified nearly one-third of EIA-positive infections. Combined with PCT <0.25 ng/mL, LFA could reduce unnecessary antibacterial use by 77%.


Asunto(s)
Coccidioidomicosis , Coccidioidomicosis/diagnóstico , Diagnóstico Precoz , Humanos , Inmunoensayo , Técnicas para Inmunoenzimas , Sensibilidad y Especificidad
5.
BJOG ; 128(7): 1248-1255, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-33142034

RESUMEN

OBJECTIVE: To compare rates of vaginal delivery and adverse outcomes of instrumental delivery trials in obstetric theatre compared to primary emergency full dilation caesarean section. DESIGN: Retrospective cohort study. SETTING: University teaching hospital. POPULATION: Women with singleton, non-anomalous, pregnancy undergoing instrumental delivery trial in obstetric theatre. METHODS: Data were collected from consecutive cases during 2014 until 2018 using clinical records. Multivariate regression analysis was used comparing outcomes per first delivery method. MAIN OUTCOME MEASURES: Primary outcome was completion of vaginal delivery between all methods of instrumental delivery. Secondary outcome was a composite of immediate perinatal adverse outcomes for instrumental delivery modes and primary full dilation caesarean section. RESULTS: From 971 deliveries analysed: ventouse delivery was significantly less likely to achieve vaginal delivery compared with Keilland's forceps delivery (odds ratio [OR] 0.42, 95% CI 0.22-0.79). Once confounding factors were adjusted for, adverse outcome rates were less frequent in the Keilland's forceps group than with primary full dilation caesarean section (OR 0.37, 95% CI 0.16-0.81); however, the receiver operating characteristic curve produced from this model demonstrated a low predictive value (AUC 0.64). CONCLUSIONS: Attempting instrumental delivery in delivery suite theatre, as an alternative to primary emergency full dilation caesarean section, is both reasonable and safe. In this study, ventouse delivery performed poorly in comparison with other modes of instrumental delivery. Further research in the form of randomised controlled trials to identify the optimal mode of second stage delivery is paramount. TWEETABLE ABSTRACT: Instrumental delivery trials in theatre are safe but use of ventouse was associated with a higher rate of failure.


Asunto(s)
Cesárea/efectos adversos , Segundo Periodo del Trabajo de Parto , Forceps Obstétrico/efectos adversos , Extracción Obstétrica por Aspiración/efectos adversos , Adulto , Puntaje de Apgar , Estudios de Cohortes , Parto Obstétrico , Femenino , Humanos , Perineo/lesiones , Embarazo , Estudios Retrospectivos , Reino Unido
6.
Oecologia ; 196(4): 1139-1152, 2021 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-34331568

RESUMEN

Invasive species are a major cause of biodiversity loss worldwide, but their impact on communities and the mechanisms driving those impacts are varied and not well understood. This study employs functional diversity metrics and guilds-suites of species with similar traits-to assess the influence of an invasive tree (Tamarix spp.) on riparian plant communities in the southwestern United States. We asked: (1) What traits define riparian plant guilds in this system? (2) How do the abundances of guilds vary along gradients of Tamarix cover and abiotic conditions? (3) How does the functional diversity of the plant community respond to the gradients of Tamarix cover and abiotic conditions? We found nine distinct guilds primarily defined by reproductive strategy, as well as growth form, height, seed weight, specific leaf area, drought and anaerobic tolerance. Guild abundance varied along a covarying gradient of local and regional environmental factors and Tamarix cover. Guilds relying on sexual reproduction, in particular, those producing many light seeds over a long period of time were more strongly associated with drier sites and higher Tamarix cover. Tamarix itself appeared to facilitate more shade-tolerant species with higher specific leaf areas than would be expected in resource-poor environments. Additionally, we found a high degree of specialization (low functional diversity) in the wettest, most flood-prone, lowest Tamarix cover sites as well as in the driest, most stable, highest Tamarix cover sites. These guilds can be used to anticipate plant community response to restoration efforts and in selecting appropriate species for revegetation.


Asunto(s)
Ríos , Árboles , Biodiversidad , Especies Introducidas , Plantas
7.
J Biol Regul Homeost Agents ; 35(3): 865-880, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34042415

RESUMEN

Human Coronavirus (CoV) infections, including SARS-COV, MERS-COV, and SARS-CoV-2, usually cause fatal lower and upper respiratory tract infections due to exacerbated expression of pro-inflammatory cytokines and chemokines. We aim to summarize different aspects, such as CoV immune evasion mechanisms and host innate immune response to these infections, and their role in pathogenesis. We have also elaborated the up-to-date findings on different vaccine development strategies and progress against CoVs in both humans and non-human models. Most importantly, we have described the Phageome-human immune interaction, its therapeutic usage as anti-viral, anti-inflammatory agent, and implications for multiple vaccine development systems. The data suggest that endogenous phages might play a vital role in eliminating the infection and regulating the body's immune system. Considering the innate-immune-induced pathogenesis against CoVs and the therapeutic aptitude of phageome, we propose that the prophylactic administration of phages and phage-based vaccines could be a useful strategy to control the emerging CoV infections.


Asunto(s)
COVID-19 , Viroma , Humanos , Inmunidad Innata , SARS-CoV-2 , Vacunación
8.
Philos Trans A Math Phys Eng Sci ; 378(2173): 20190334, 2020 Jun 12.
Artículo en Inglés | MEDLINE | ID: mdl-32448071

RESUMEN

Cardiac contraction is the result of integrated cellular, tissue and organ function. Biophysical in silico cardiac models offer a systematic approach for studying these multi-scale interactions. The computational cost of such models is high, due to their multi-parametric and nonlinear nature. This has so far made it difficult to perform model fitting and prevented global sensitivity analysis (GSA) studies. We propose a machine learning approach based on Gaussian process emulation of model simulations using probabilistic surrogate models, which enables model parameter inference via a Bayesian history matching (HM) technique and GSA on whole-organ mechanics. This framework is applied to model healthy and aortic-banded hypertensive rats, a commonly used animal model of heart failure disease. The obtained probabilistic surrogate models accurately predicted the left ventricular pump function (R2 = 0.92 for ejection fraction). The HM technique allowed us to fit both the control and diseased virtual bi-ventricular rat heart models to magnetic resonance imaging and literature data, with model outputs from the constrained parameter space falling within 2 SD of the respective experimental values. The GSA identified Troponin C and cross-bridge kinetics as key parameters in determining both systolic and diastolic ventricular function. This article is part of the theme issue 'Uncertainty quantification in cardiac and cardiovascular modelling and simulation'.

9.
Int J Audiol ; 59(1): 16-23, 2020 01.
Artículo en Inglés | MEDLINE | ID: mdl-31486696

RESUMEN

Objective: To determine audiology student perceptions of two simulated learning environments (SLE) in paediatric audiology.Design: A one-shot case study design.Study sample: Fifteen audiology students who completed questionnaires after participating in two SLEs, one simulating auditory brainstem response (ABR) assessments of neonates in a hospital ward and one simulating visually reinforced orientation audiometry (VROA) assessments of young children in an audiology clinic.Results: The students responded positively to 11/11 areas of audiometric testing and client interaction in both SLEs, to 7/7 aspects of their interactions with the mannequins in both SLEs, and to 8/8 aspects of their interactions with fellow students playing the role of parent in the ABR SLE and 7/8 of these aspects in the VROA SLE. The students reported low levels of anxiety towards both SLEs but rated the ABR SLE more highly than the VROA SLE in areas of preparedness, effectiveness, realism, pre-SLE training, reinforcement of lecture content, and overall usefulness.Conclusions: The participating students responded positively to almost all aspects of both SLEs. Further research is warranted using research designs capable of determining if these SLEs directly improve student abilities as they transition from academic settings to clinical placements in paediatric audiology.


Asunto(s)
Audiólogos/psicología , Audiología/educación , Pediatría/educación , Entrenamiento Simulado/métodos , Estudiantes del Área de la Salud/psicología , Adulto , Audiólogos/educación , Niño , Femenino , Humanos , Masculino
10.
Int J Mol Sci ; 21(17)2020 Aug 22.
Artículo en Inglés | MEDLINE | ID: mdl-32842706

RESUMEN

Retinitis pigmentosa (RP) is a generic term for a group of genetic diseases characterized by loss of rod and cone photoreceptor cells. Although the genetic causes of RP frequently only affect the rod photoreceptor cells, cone photoreceptors become stressed in the absence of rods and undergo a secondary degeneration. Changes in the gene expression profile of cone photoreceptor cells are likely to occur prior to observable physiological changes. To this end, we sought to achieve greater understanding of the changes in cone photoreceptor cells early in the degeneration process of the Rho-/- mouse model. To account for gene expression changes attributed to loss of cone photoreceptor cells, we normalized PCR in the remaining number of cones to a cone cell reporter (OPN1-GFP). Gene expression profiles of key components involved in the cone phototransduction cascade were correlated with tests of retinal cone function prior to cell loss. A significant downregulation of the photoreceptor transcription factor Crx was observed, which preceded a significant downregulation in cone opsin transcripts that coincided with declining cone function. Our data add to the growing understanding of molecular changes that occur prior to cone dysfunction in a model of rod-cone dystrophy. It is of interest that gene supplementation of CRX by adeno-associated viral vector delivery prior to cone cell loss did not prevent cone photoreceptor degeneration in this mouse model.


Asunto(s)
Distrofias de Conos y Bastones/genética , Distrofias de Conos y Bastones/fisiopatología , Animales , Distrofias de Conos y Bastones/terapia , Modelos Animales de Enfermedad , Electrorretinografía , Regulación de la Expresión Génica , Terapia Genética/métodos , Vectores Genéticos/administración & dosificación , Vectores Genéticos/genética , Vectores Genéticos/farmacología , Proteínas Fluorescentes Verdes/genética , Células HEK293 , Proteínas de Homeodominio/genética , Proteínas de Homeodominio/farmacología , Humanos , Ratones Transgénicos , Oftalmoscopía , Células Fotorreceptoras Retinianas Conos/patología , Células Fotorreceptoras Retinianas Conos/fisiología , Rodopsina/genética , Opsinas de Bastones/genética , Tomografía de Coherencia Óptica , Transactivadores/genética , Transactivadores/farmacología , Visión Ocular/genética
11.
Curr Genomics ; 20(2): 124-133, 2019 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-31555063

RESUMEN

BACKGROUND: In various biological processes and cell functions, Post Translational Modifications (PTMs) bear critical significance. Hydroxylation of proline residue is one kind of PTM, which occurs following protein synthesis. The experimental determination of hydroxyproline sites in an uncharacterized protein sequence requires extensive, time-consuming and expensive tests. METHODS: With the torrential slide of protein sequences produced in the post-genomic age, certain remarkable computational strategies are desired to overwhelm the issue. Keeping in view the composition and sequence order effect within polypeptide chains, an innovative in-silico> predictor via a mathematical model is proposed. RESULTS: Later, it was stringently verified using self-consistency, cross-validation and jackknife tests on benchmark datasets. It was established after a rigorous jackknife test that the new predictor values are superior to the values predicted by previous methodologies. CONCLUSION: This new mathematical technique is the most appropriate and encouraging as compared with the existing models.

12.
Graefes Arch Clin Exp Ophthalmol ; 256(5): 879-884, 2018 May.
Artículo en Inglés | MEDLINE | ID: mdl-29532171

RESUMEN

AIM: The aim of this study is to determine whether there is any difference in the quality of life of patients with a blind eye with long-term silicone oil compared to without. METHOD: Patients with either long-term silicone oil in situ (N = 17), defined as a period greater than 6 months duration with no plan for future removal, or those with a phthisical, non oil-filled eye were identified (N = 13). Two validated questionnaires (NEI VFQ-25 and the FACE-Q) that cover indicators for visual function, pain and cosmesis were sent to all patients in the two cohorts. RESULTS: There was no significant difference found in quality of life outcomes between the two groups in terms of visual function, pain or cosmesis. CONCLUSION: The results of this study support a holistic approach to the consent process before vitreoretinal surgery. Patients that may need to undergo multiple vitreoretinal procedures, where the endstage result is a long-term silicone oil fill, should be informed that their functional outcome may be similar to having no surgical intervention.


Asunto(s)
Ceguera/psicología , Ojo/patología , Calidad de Vida/psicología , Desprendimiento de Retina/psicología , Aceites de Silicona/administración & dosificación , Adulto , Anciano , Anciano de 80 o más Años , Atrofia/psicología , Endotaponamiento , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Desprendimiento de Retina/cirugía , Perfil de Impacto de Enfermedad , Encuestas y Cuestionarios , Agudeza Visual/fisiología , Vitrectomía , Cirugía Vitreorretiniana
13.
Aging Clin Exp Res ; 28(2): 359-62, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26084248

RESUMEN

BACKGROUND: There is a limited data on the association between serum uric acid (SUA) and cardiovascular disease (CVD) among the very elderly population. AIMS: We evaluated the association of SUA, highly sensitive C-reactive protein (hs-CRP, a marker of vascular and systemic inflammation), and coronary artery calcification (CAC, a marker of subclinical CVD) in a cohort of Brazilian octogenarians (≥80 years) free from known clinical CVD. METHODS: 208 individuals were included and evaluated for an association between increasing tertiles of SUA, elevated hs-CRP (>3 mg/dL), the presence and burden of CAC (CAC > 0 and CAC > 400). RESULTS: The median hs-CRP was 1.9 (IQR = 1.0-3.4) mg/L and mean SUA was 5.3 (±1.4) mg/dL. The overall prevalence of elevated hs-CRP (>3 mg/dL) was 31 %. A significant increase in the prevalence of hs-CRP was noted across the higher SUA tertiles (p < 0.001) with 3.4 times the odds of having elevated hs-CRP in the highest SUA tertile (3.40; CI = 1.27-9.08). No association was noted with either the CAC presence and/or CAC burden (CAC > 0 or CAC > 400) across the increasing SUA tertiles. DISCUSSION: In the healthy octogenarians, higher SUA levels are associated with vascular inflammation (hs-CRP) but not with coronary atherosclerosis (CAC); markers for the subclinical CVD.


Asunto(s)
Enfermedad de la Arteria Coronaria/sangre , Inflamación/sangre , Ácido Úrico/sangre , Calcificación Vascular/diagnóstico , Anciano de 80 o más Años , Biomarcadores/sangre , Brasil/epidemiología , Proteína C-Reactiva/metabolismo , Enfermedad de la Arteria Coronaria/epidemiología , Enfermedad de la Arteria Coronaria/fisiopatología , Vasos Coronarios/patología , Vasos Coronarios/fisiopatología , Femenino , Humanos , Masculino , Prevalencia , Factores de Riesgo
14.
Phys Rev Lett ; 115(7): 071801, 2015 Aug 14.
Artículo en Inglés | MEDLINE | ID: mdl-26317713

RESUMEN

A new measurement of the branching ratio R_{e/µ}=Γ(π^{+}→e^{+}ν+π^{+}→e^{+}νγ)/Γ(π^{+}→µ^{+}ν+π^{+}→µ^{+}νγ) resulted in R_{e/µ}^{exp}=[1.2344±0.0023(stat)±0.0019(syst)]×10^{-4}. This is in agreement with the standard model prediction and improves the test of electron-muon universality to the level of 0.1%.

15.
Oman J Ophthalmol ; 17(1): 43-46, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38524332

RESUMEN

OBJECTIVES: The objective of this study was to investigate the efficacy of intravitreal antivascular endothelial growth factor (VEGF) therapy in the treatment of macular edema secondary to retinal vein occlusion (RVO) in Afghanistan. METHODS: A retrospective analysis was conducted of all RVO cases that underwent intravitreal ant-VEGF injection at the two leading hospitals in Kabul. The main outcome measures were visual acuity and central retinal thickness as determined by optical coherence tomography. Information was also collected on the distance traveled by each patient and the frequency of injections. RESULTS: One hundred and twenty-five eyes of 121 patients (86 males) with RVO were identified as having undergone treatment, with a mean age of 53.1 years (range 20-80). The only agent used was bevacizumab. The mean central retinal thickness reduced from 624.2 ± 24.9 µm at the baseline to 257.8 ± 5.7 µm following treatment (P < 0.001). There was a small increase in visual acuity from 1.33 LogMAR at the baseline to 1.13 LogMAR following the most recent injection (P = 0.03, paired t-test). The mean distance traveled by patients was 173.9 km (range 2-447 km). CONCLUSION: Despite the challenges of health-care provision in Afghanistan, this review shows that the use of intravitreal bevacizumab has provided an effective treatment for macular edema after RVO.

16.
J Educ Health Promot ; 13: 27, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38545301

RESUMEN

BACKGROUND: Self-directed learning (SDL) is an essential aspect of adult education or andragogy, gaining significance in medical education with the introduction of competency-based medical education. The primary objective of this study is to assess the self-directed learning abilities of second-year medical undergraduates in Chennai, South India, and to identify potential challenges and gaps in their learning process. MATERIALS AND METHODS: A cross-sectional study was conducted among 82 second-year medical students attending self-directed learning sessions at a medical college in Chennai. Data were collected using the self-directed learning instrument (SDLI), a standardized questionnaire, administered through Google Forms. Participants' identities were maintained confidential. Data were analyzed using SPSS version 22.0. Descriptive data were presented as proportions and percentages. Normally distributed quantitative data were expressed as mean and standard deviation. Non-normal continuous data were expressed as median and interquartile range (IQR). RESULTS: The majority of the students (61%) demonstrated a high level of SDL ability, with a median score of 76. Students exhibited strong learning motivation (mean score 4.11) but struggled with planning and implementation (mean score 3.07). The maximum mean score was 4.11 for item 3 (constant improvement and excelling in learning), and the minimum mean score was 3.07 for item 11 (arranging and controlling learning time). The students showed high self-monitoring (mean score 3.76) and interpersonal communication skills (mean score 4.00). CONCLUSIONS: SDL emerges as a boon for medical undergraduates in this study. By providing adequate training to faculty members on SDL implementation and guidance to students on planning and time management, SDL can play a pivotal role in enhancing medical education quality and fostering life-long learning among future medical professionals.

17.
Braz J Biol ; 84: e262479, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36700584

RESUMEN

The methanolic, chloroformic and aqueous extract of Achillea millefolium and Chaerophyllum villosum were investigated for cytotoxicity, phytotoxic and insecticidal activities. Cytotoxicity was investigated by brine shrimp lethality assay indicating that the crude methanolic extract of A.millefolium and chloroformic extract of C.villosum revealed highest mortality of brine shrimps with (LD50 of 52.60 µg/ml) and (14.81 µg/ml). Phytotoxicity was evaluated using the Lemna minor bioassay which revealed that the crude methanolic extract of A.millefolium and C.villosum extract has maximum inhibition of Lemna minor with (Fl50 6.60 µg/ml) and (0.67 µg/ml).The insecticidal activity showed that among all the insects studied it was observed that methanolic extract of A. millefoliumand C. villosum was highly toxic to Sphenoptera dadkhani with (LD50=4.17 µg/ml) and (0.34 µg/ml). From the present study it can be concluded that different extracts from A. millefolium and C. villosum showed good cytotoxic, phytotoxic and insecticidal activity in a dose dependent manner.


Asunto(s)
Achillea , Antineoplásicos , Insecticidas , Extractos Vegetales/toxicidad , Insecticidas/toxicidad
18.
Eur J Ophthalmol ; 33(1): 223-229, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-35369780

RESUMEN

INTRODUCTION: Performing cataract surgery in the setting of only one seeing-eye has significant benefits but also potential negative consequences for both patient and surgeon. This study investigates the surgical outcomes in patients undergoing cataract surgery on their only seeing-eye. METHODS: A retrospective analysis was conducted in a single tertiary centre of all adult patients who had undergone cataract surgery on their only eye, where the fellow eye had a vision of 1.0 LogMAR or worse. Complication rates and visual outcomes were compared against data from the National Ophthalmology Database (NOD) Audit. RESULTS: 918 patients underwent cataract surgery on their only seeing-eye and had their postoperative visual acuity recorded. The overall unadjusted complication rate was 4.0% (versus 2.5% from NOD data) with the rate of posterior capsule rupture (PCR) being 1.9% (versus 1.14% from NOD data). 72.5% (versus 91.5% from NOD data) of patients attained a post-operative visual acuity of 0.3 LogMAR or better. The grade of surgeon performing the surgery did not have a statistically significant effect on the risk of complications. DISCUSSION: In this cohort of only-eye patients undergoing cataract surgery, there was a small increased risk of operative complications including an increased, unadjusted risk of PCR, and fewer eyes achieved 0.3 LogMAR vision post-operatively compared to the NOD audit data. Grade of surgeon did not have an impact on the complication rate, indicating that with appropriate supervision, trainee surgeons may gain experience in only-eye surgery without additional risk to the patient. Further multicentre studies are recommended to assess reproducibility across units.


Asunto(s)
Extracción de Catarata , Catarata , Oftalmología , Adulto , Humanos , Estudios Retrospectivos , Reproducibilidad de los Resultados , Extracción de Catarata/efectos adversos , Catarata/etiología , Resultado del Tratamiento
19.
Int J Dermatol ; 62(5): 672-680, 2023 May.
Artículo en Inglés | MEDLINE | ID: mdl-36789964

RESUMEN

BACKGROUND: Congenital ichthyosis is a diverse group of keratinization disorders associated with generalized scaling of skin of varying severity. The non-syndromic forms of congenital ichthyosis are further grouped into common ichthyosis (ichthyosis vulgaris and X-linked ichthyosis), autosomal recessive congenital ichthyosis, and keratopathic ichthyosis. OBJECTIVE: To identify sequence variants involved in different forms of hereditary ichthyoses. METHODS: We studied eight families with different types of ichthyosis including four families with autosomal recessive congenital ichthyosis and four families with common ichthyosis. Whole exome sequencing and PCR based genotyping was carried out to find out the molecular basis of disease. RESULTS: In one family, a novel duplication sequence variant NM_002016.2:c.2767dupT; NP_002007.1:p.Ser923PhefsTer2 was identified in FLG gene; in four families a previously reported nonsense sequence variant NM_000359.3:c.232C>T; NP_002007.1:p.Arg78Ter was identified in TGM1 gene, while, in three families of X-linked recessive ichthyosis, the whole STS gene (NM_001320752.2; NP_001307681.2) regions were deleted. STUDY LIMITATION: Gene expression studies have not been performed that would have strengthened the findings of computational analysis. CONCLUSION: This study highlights the significance of the c.232C>T variant in the TGM1 gene as a possible founder mutation, complete STS gene deletion as reported previously in Pakistani population, while novel sequence variant in the FLG gene expands the spectrum of variations in this gene. These findings may be used for genetic counseling of the studied families.


Asunto(s)
Eritrodermia Ictiosiforme Congénita , Ictiosis Lamelar , Ictiosis , Humanos , Eritrodermia Ictiosiforme Congénita/genética , Ictiosis/genética , Ictiosis Lamelar/genética , Mutación , Pakistán
20.
AJNR Am J Neuroradiol ; 43(3): 474-477, 2022 03.
Artículo en Inglés | MEDLINE | ID: mdl-35086800

RESUMEN

BACKGROUND AND PURPOSE: As a result of the coronavirus disease 2019 (COVID-19) pandemic, many radiology departments shifted to working a portion of clinical assignments from home. To determine the effect of working from home on performance, productivity, quality, and safety, we evaluated turnaround time, volume of studies, and error rates on rotations worked from home compared with in the hospital. MATERIALS AND METHODS: The number of studies interpreted per day for each neuroradiologist, turnaround times, and error rates reported to peer learning was identified from April 1, 2020, through September 30, 2020. For each neuroradiologist, mean turnaround times and volumes per day at home versus in the hospital were compared. Similar comparison was performed for STAT studies. RESULTS: During the time period, 2597 CTs (1897 at home, 700 in the hospital) and 3685 MRIs (2601 at home, 1084 in the hospital) were read. By individual neuroradiologists, 57% (4/7) had shorter turnaround time at home and 57% (4/7) demonstrated an increase in the mean number of studies per day read at home. No statistically significant difference was noted in the neuroradiologists' performance while reading STAT studies. Reported error rates were not found to be higher at home, with statistically significantly lower rates when working at home (P = .018). CONCLUSIONS: Variable productivity and performance of neuroradiologists when working from home versus in the hospital were found, being 57% faster and/or more productive while working at home without an increase in error rates. The decision to work at home versus in the hospital may best be based on local factors, balancing the variability among individual neuroradiologist's and the institution's needs, recognizing that working from home is not a one-size-fits-all phenomenon but requires adaptability for successful implementation.


Asunto(s)
COVID-19 , Pandemias , Niño , Hospitales , Humanos , Pandemias/prevención & control , Radiólogos , SARS-CoV-2
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