Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 54
Filtrar
1.
Cureus ; 16(1): e51728, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38318589

RESUMEN

The varicella-zoster virus reactivates to cause herpes zoster, commonly referred to as shingles. Shingles traditionally manifest as itchy vesicles in a dermatomal distribution, accompanied by related constitutional symptoms in immunocompetent patients. Usually, the rash resolves completely in seven to ten days. Herpetic neuralgia is the most typical herpes zoster consequence. Around 1% to 5% of individuals have motor impairments, with Ramsay-Hunt syndrome being the most prevalent ailment. Additional problems encompass abdominal pseudohernia, paralytic ileus/colonic pseudo-obstruction, hemidiaphragm paralysis, bladder dysfunction, localized paresis, constipation, and visceral neuropathy. Herpes zoster infection typically involves the posterior root ganglia, and most of the symptoms are sensory. Motor involvement can occur in the same distribution but is relatively uncommon. Segmental zoster paresis is a rare motor complication of herpes zoster, mimicking an abdominal hernia, which has an incidence of approximately 0.7%, but it needs no surgery different from the real abdominal wall hernia. In this case report, we describe a patient who, three weeks after developing a herpes zoster rash, acquired an abdominal protrusion, i.e., herpes-induced pseudohernia.

2.
J Pharmacol Exp Ther ; 388(2): 536-545, 2024 01 17.
Artículo en Inglés | MEDLINE | ID: mdl-37652710

RESUMEN

Phosgene oxime (CX), categorized as a vesicating chemical threat agent, causes effects that resemble an urticant or nettle agent. CX is an emerging potential threat agent that can be deployed alone or with other chemical threat agents to enhance their toxic effects. Studies on CX-induced skin toxicity, injury progression, and related biomarkers are largely unknown. To study the physiologic changes, skin clinical lesions and their progression, skin exposure of SKH-1 and C57BL/6 mice was carried out with vapor from 10 µl CX for 0.5-minute or 1.0-minute durations using a designed exposure system for consistent CX vapor exposure. One-minute exposure caused sharp (SKH-1) or sustained (C57BL/6) decrease in respiratory and heart rate, leading to mortality in both mouse strains. Both exposures caused immediate blanching, erythema with erythematous ring (wheel) and edema, and an increase in skin bifold thickness. Necrosis was also observed in the 0.5-minute CX exposure group. Both mouse strains showed comparative skin clinical lesions upon CX exposure; however, skin bifold thickness and erythema remained elevated up to 14 days postexposure in SKH-1 mice but not in C57BL/6 mice. Our data suggest that CX causes immediate changes in the physiologic parameters and gross skin lesions resembling urticaria, which could involve mast cell activation and intense systemic toxicity. This novel study recorded and compared the progression of skin injury to establish clinical biomarkers of CX dermal exposure in both the sexes of two murine strains relevant for skin and systemic injury studies and therapeutic target identification. SIGNIFICANCE STATEMENT: Phosgene oxime (CX), categorized as a vesicating agent, is considered as a potent chemical weapon and is of high military and terrorist threat interest since it produces rapid onset of severe injury as an urticant. However, biomarkers of clinical relevance related to its toxicity and injury progression are not studied. Data from this study provide useful clinical markers of CX skin toxicity in mouse models using a reliable CX exposure system for future mechanistic and efficacy studies.


Asunto(s)
Sustancias para la Guerra Química , Gas Mostaza , Fosgeno , Animales , Ratones , Fosgeno/toxicidad , Modelos Animales de Enfermedad , Gas Mostaza/toxicidad , Ratones Endogámicos C57BL , Piel , Irritantes/toxicidad , Eritema/inducido químicamente , Eritema/patología , Biomarcadores , Oximas/toxicidad , Sustancias para la Guerra Química/toxicidad
4.
Cureus ; 15(3): e35919, 2023 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37050994

RESUMEN

Introduction Stroke is a devastating and disabling cerebrovascular disease with a significant amount of residual deficit. The prevalence of stroke is in a rising trend in India. Larger studies are needed for the evaluation of risk factors. Material and methods This cross-sectional study aimed to assess the clinical profile of patients with stroke. The demographic details of the patients were taken, comorbidities were noted, and laboratory tests were done. Observation The most common age group who presented with stroke was 61-80 years, followed by 41-60 years, comprising 47% and 46%, respectively. Ischemic stroke was more common (60%) than hemorrhagic stroke (40%). Male patients were more than female patients. Alcohol, smoking, hypertension, diabetes, anemia, and proteinuria were present in the study group. Conclusion Regular evaluation of blood pressure, blood sugar, lipid profile, and proteinuria should be routinely done in patients with diabetes and hypertension who are more than 40 years old.

5.
Indian J Dermatol Venereol Leprol ; 89(5): 647-655, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37067143

RESUMEN

Background Androgenetic alopecia is a common, chronic, non-scarring alopecia. It is characterised by stepwise miniaturisation of the hair follicles, due to alteration in the hair cycle dynamics, leading to the transformation of terminal hair follicles into a vellus ones. Oral finasteride and topical minoxidil are the only approved drugs for treating this condition. Due to a limited number of effective therapies for androgenetic alopecia, platelet-rich plasma may be an effective alternative treatment. Aims To study the effect of activator in platelet-rich plasma and baseline platelet count in platelet-rich plasma on the treatment of androgenetic alopecia. Methods A randomised, double-blind split-head comparative study. The sample size was calculated and randomisation was done. Patients with androgenetic alopecia were allocated into two groups; in the first group, autologous activated platelet-rich plasma was injected in the right half of the affected scalp and autologous non-activated platelet-rich plasma was injected in the left half of the affected scalp and vice versa in the second group. Patients were also categorised on the basis of platelet counts in their platelet-rich plasma in three groups; group A (6-8 lakh/mm3), group B (8.1-10 lakh/mm3) and group C (>10 lakh/mm3). Interventions were done monthly for three months and followed up for the next three months. Effects of interventions were assessed by hair density, hair thickness, patient self-assessment and clinical photography. Results A total of 80 patients were included in the study. Activated platelet-rich plasma produced significant improvement of hair density after four months and hair thickness at 6 months. An increase in platelet count led to a significant increase in hair density and hair thickness after three and four months respectively and a highly significant increase in both parameters at the end of the study. Limitations Long-term follow-up of cases was not done and no measurement of vellus hair count was done. Conclusion There is a significant effect of activator and platelet count of the platelet-rich plasma on hair density as well as hair thickness.


Asunto(s)
Alopecia , Plasma Rico en Plaquetas , Humanos , Recuento de Plaquetas , Método Doble Ciego , Alopecia/diagnóstico , Alopecia/tratamiento farmacológico , Cabello , Minoxidil , Resultado del Tratamiento
6.
Indian J Dermatol ; 67(4): 334-342, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36578750

RESUMEN

Context: Chronic non-healing ulcer causes significant morbidity, high cost and reduced quality of life. Aims: To compare autologous platelet-rich fibrin matrix and transplantation of autologous non-cultured epidermal cell suspension in the treatment of chronic non-healing ulcers. Methods: The study was single-centre, prospective, randomised comparative study conducted in a tertiary care center in North India. Patients with chronic non-healing ulcer were included and randomly divided into two treatment groups- Group 1: Platelet-rich fibrin matrix (PRFM) procedure was done every 2 weeks with maximum three sittings and in Group 2: Transplantation of autologous noncultured epidermal cell suspension (NCES) procedure was done once. Follow-up was done every 2 weeks for 8 weeks then monthly for up to 5 months to evaluate the healing of the ulcer. The data were analysed by statistical package for social science (SPSS) trial version 22. To find out a significant difference in mean value between groups, the Chi-square test, student's t-test, and Mann-Whitney U test were used. Results: A total of 41 patients were included in the study. Complete healing of ulcers occurred in 89.5% of the patients in the PRFM group and 93.8% of the patients in the NCES group at the end of 5 months (P = 0.33). The mean duration of complete healing in PRFM was 1.7 months and in NCES was 2.13 months (P = 0.20). Conclusions: Both procedures were effective, and there was no significant difference between the two procedures.

8.
J Hand Microsurg ; 13(3): 196-201, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-34511839

RESUMEN

Following the Lancet Commission on Global Surgery in 2015, the Global Surgery Fellowships have risen in popularity, advertised as formalized opportunities for surgical trainees who have an interest in international surgical care. There is currently no up-to-date review of all fellowships available and an urgently needed overview of these opportunities is presented, including critical appraisal of their accessibility, funding, and outcomes. Detailed searches were conducted on the web engine Google, using the term "global surgery fellowship" and iterations. From the 547 resulting links, after applying exclusion criteria, 69 relevant fellowships were included in analysis. The majority of fellowships based in the United States (55%) and arranged by non-governmental organizations (NGOs) or universities (>70%). Also, 60% of fellowships had a duration of 1 year or longer. Only a quarter of the fellowships was open solely to trainees from low- or middle-income countries (LMIC), with over 80% of these being full funded. But 40% of the fellowships were advertised as open to trainees from any country, though only one-third of these provided full funding. Key themes across the fellowships' outcomes included "Professional Development," "Research," and "LMIC Quality Improvement." Almost all of the fellowships (95%) stated international travel opportunities. Twelve of the fellowships offered higher degrees, with the most common being a Masters of Public Health. The global distribution of fellowships and reduced funding opportunities for trainees from LMIC limit accessibility of the Global Surgery Fellowships. It is, however, still promising that most of key themes and high rates of international work are in line with The Lancet Commission's recommendations. This overview of the Global Surgery Fellowships highlights the need for collaboration between institutions and has illustrated points for consideration when introducing new and the value of established fellowships.

9.
Toxicol Lett ; 349: 124-133, 2021 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-34153409

RESUMEN

With a possibility for the use of chemical weapons in battlefield or in terrorist activities, effective therapies against the devastating ocular injuries, from their exposure, are needed. Oxygen plays a vital role in ocular tissue preservation and wound repair. We tested the efficacy of supersaturated oxygen emulsion (SSOE) in reducing ex vivo corneal and keratocyte injury from chloropicrin (CP). CP, currently used as a pesticide, is a chemical threat agent like the vesicating mustard agents and causes severe corneal injury. Since our previous study in human corneal epithelial cells showed the treatment potential of SSOE (55 %), we further tested its efficacy in an ex vivo CP-induced rabbit corneal injury model. Corneas were exposed to CP (700 nmol) for 2 h, washed and cultured with or without SSOE for 24 h or 96 h. At 96 h post CP exposure, SSOE treatment presented a healing tendency of the corneal epithelial layer, and abrogated the CP-induced epithelial apoptotic cell death. SSOE treatment also reduced the CP induced DNA damage (H2A.X phosphorylation) and inflammatory markers (e.g. MMP9, IL-21, MIP-1ß, TNFα). Further examination of the treatment efficacy of SSOE alone or in combination with other therapies in in vivo cornea injury models for CP and vesicants, is warranted.


Asunto(s)
Quemaduras Químicas/tratamiento farmacológico , Córnea/efectos de los fármacos , Quemaduras Oculares/tratamiento farmacológico , Hidrocarburos Clorados/toxicidad , Oxígeno/farmacología , Animales , Apoptosis/efectos de los fármacos , Quemaduras Químicas/etiología , Quemaduras Químicas/metabolismo , Quemaduras Químicas/patología , Córnea/metabolismo , Córnea/patología , Citocinas/metabolismo , Daño del ADN , Emulsiones , Quemaduras Oculares/inducido químicamente , Quemaduras Oculares/metabolismo , Quemaduras Oculares/patología , Mediadores de Inflamación/metabolismo , Masculino , Técnicas de Cultivo de Órganos , Conejos , Cicatrización de Heridas/efectos de los fármacos
10.
Indian J Dermatol ; 66(1): 55-59, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33911294

RESUMEN

BACKGROUND: Identification of culprit drug causing adverse cutaneous drug reactions may not be possible clinically due to the intake of more than one drug. AIM: To compare the sensitivity of skin tests with gold standard oral rechallenge test to detect adverse cutaneous drug reactions. MATERIALS AND METHODS: This is a prospective interventional hospital-based study of patients with adverse cutaneous drug reactions attending the outpatient department of dermatology and venereology at a tertiary care center over a 12-month period. Skin prick tests, intradermal tests, and oral rechallenge tests were performed in these patients and their sensitivities were compared. The data of quantitative nature is presented in mean and standard deviation, and categorical variables are presented in number and percentage. The sensitivity of skin tests is compared with the gold standard oral rechallenge test. RESULTS: A total of 49 patients with adverse cutaneous drug reactions were evaluated. Clinical spectrum of adverse cutaneous drug reactions ranged from mild to severe, with fixed drug eruption being the commonest (55.1%) followed by maculopapular exanthem (32.7%). The highest incidence was with fluoroquinolones (43.8%) followed by nonsteroidal anti-inflammatory drugs. Fluoroquinolones were the major cause of fixed drug eruption followed by nonsteroidal anti-inflammatory drugs. The sensitivity of skin prick test and intradermal tests were 49% and 73%, respectively and the difference was highly significant (P < 0.001). The difference in sensitivity in skin prick test versus oral rechallenge test and intradermal test versus oral rechallenge test was also highly significant (P < 0.001). LIMITATIONS: Small sample size was a major limitation. Histopathological examinations and human leukocyte antigen associations could not be done. CONCLUSION: Predominant causative drugs were fluoroquinolones followed by nonsteroidal anti-inflammatory drugs. Sensitivities of skin prick test and intradermal test were quite good and these skin tests should be performed before oral rechallenge test in cases of adverse cutaneous drug reactions.

12.
J Mech Behav Biomed Mater ; 114: 104231, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-33276214

RESUMEN

Herein, three dimensional porous 1393B3 borate-based glass (BBG) scaffold along with their CuO derivatives (C1BBG, C2BBG, and C3BBG) tailored with trabecular bones' architecture were prepared by melt-quench route followed by foam replica technique. The properties of 'CuO incorporated' scaffolds, as compared to 'as prepared' scaffold were analyzed by a series of In vitro investigations for enhancement in biological compatibility, bioactivity, and physicomechanical performances. The in vitro study demonstrates superior mechanochemical stability of CBBGs (CuO derived 1393B3) than the pure BBG, while causing no or minimal effect on bioactivity and cytocompatibility post CuO incorporation to the BBG. In fact, the biological compatibility examined through MTT, Live/Dead, and cell adhesion study using the L929 cell lines was enhanced in the CBBGs up to 1% CuO incorporated scaffolds (C1BBG and C2BBG) in most cases. However, the enhanced biological compatibility was observed in C1BBG in comparison to other BBGs. Thus, the CuO incorporation into BBG enhanced mechanochemical and biological performance without affecting the bioactivity of the scaffold; henceforth, CBBGs could be considered neo bone tissue regenerative biomaterials.


Asunto(s)
Boratos , Andamios del Tejido , Cobre , Vidrio , Porosidad , Ingeniería de Tejidos
13.
Toxicol Mech Methods ; 31(4): 288-292, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-33297803

RESUMEN

Highly toxic industrial chemicals that are widely accessible, and hazardous chemicals like phosgene oxime (CX) that can be easily synthesized, pose a serious threat as potential chemical weapons. In addition, their accidental release can lead to chemical emergencies and mass casualties. CX, an urticant, or nettle agent, grouped with vesicating agents, causes instant pain, injury and systemic effects, which can lead to mortality. With faster cutaneous penetration, corrosive properties, and more potent toxicity compared to other vesicating agents, CX causes instantaneous and severe tissue damage. CX, a potential chemical terrorism threat agent, could therefore be weaponized with other chemical warfare agents to enhance their harmful effects. CX is the least studied vesicant and its acute and long-term toxic effects as well as its mechanism of action are largely unknown. This has hampered the identification of therapeutic targets and the development of effective medical countermeasures. There are only protective measures, decontamination, and supportive treatments available for reducing the toxic effects from CX exposure. This review summarizes CX toxicity, its known mechanism of action, and our current studies exploring the role of mast cell activation and associated signaling pathways in CX cutaneous exposure under the National Institutes of Health Countermeasures Against Chemical Threats program. Potential treatment options and the development of effective targeted countermeasures against CX-induced morbidity and mortality is also discussed.


Asunto(s)
Oximas/toxicidad , Fosgeno/toxicidad , Sustancias para la Guerra Química/toxicidad , Irritantes , Piel/efectos de los fármacos
15.
Indian J Dermatol ; 65(4): 284-289, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32831369

RESUMEN

BACKGROUND: There is a rising prevalence of dermatophyte infection especially in the tropics. It has been observed that the antifungals are not as effective as they used to be. AIMS: To determine the effectiveness of terbinafine and itraconazole in different doses and in combination in the treatment of tinea infection. MATERIALS AND METHODS: Study design was a randomized parallel group trial. Patients were randomly divided into five parallel arms in which two of the standard drugs in recommended doses were compared with their double doses and with combination of both the drugs. Patients were followed up every 2 weeks. Outcomes were assessed at 4 and 8 weeks. Cure was considered as complete clinical resolution of the lesions. Fungal culture and sensitivity were done by disk diffusion method for all patients. Parametric one-way analysis of variance (F test) and Chi-square test were used for the analysis. RESULTS: Two-hundred seventy-five patients were included in the study. Itraconazole containing groups showed significantly higher cure rates than terbinafine only groups both at 4 and 8 weeks (P < 0.001). Itraconazole containing groups, when compared against each other, were not found to be significantly different. The outcomes between terbinafine only groups were also not significantly different. Cure rates at 8 weeks were found to be greater than that at 4 weeks for all groups which were found to be highly significant (P < 0.001). CONCLUSIONS: Itraconazole seems to be more effective than terbinafine. There is no benefit in increasing the dose or using a combination regimen in the treatment of tinea. Prolonged duration of treatment is required for complete cure.

17.
Cell Rep ; 31(4): 107572, 2020 04 28.
Artículo en Inglés | MEDLINE | ID: mdl-32348770

RESUMEN

Investigating mechanisms that regulate endothelial cell (EC) growth and survival is important for understanding EC homeostasis and how ECs maintain stem cell niches. We report here that targeted loss of Id genes in adult ECs results in dilated, leaky sinusoids and a pro-inflammatory state that increases in severity over time. Disruption in sinusoidal integrity leads to increased hematopoietic stem cell (HSC) proliferation, differentiation, migration, and exhaustion. Mechanistically, sinusoidal ECs (SECs) show increased apoptosis because of reduced Bcl2-family gene expression following Id gene ablation. Furthermore, Id1-/-Id3-/- SECs and upstream type H vessels show increased expression of cyclin-dependent kinase inhibitors p21 and p27 and impaired ability to proliferate, which is rescued by reducing E2-2 expression. Id1-/-Id3-/- mice do not survive sublethal irradiation because of impaired vessel regeneration and hematopoietic failure. Thus, Id genes are required for the survival and regeneration of BM SECs during homeostasis and stress to maintain HSC development.


Asunto(s)
Proteína 1 Inhibidora de la Diferenciación/metabolismo , Proteínas Inhibidoras de la Diferenciación/metabolismo , Animales , Supervivencia Celular/fisiología , Modelos Animales de Enfermedad , Células Endoteliales/metabolismo , Células Endoteliales/fisiología , Femenino , Hematopoyesis/fisiología , Humanos , Masculino , Ratones , Ratones Endogámicos C57BL , Regeneración/fisiología
18.
Indian J Dermatol ; 65(2): 112-117, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32180596

RESUMEN

BACKGROUND: Insulin resistance (IR) is a pre-diabetic condition and has been reported in patients with acanthosis nigricans (AN) and acrochordon. AN and acrochordon are claimed to be cutaneous markers of IR. AIM: The purpose of this paper was to study the association of AN and acrochordon with IR. METHODS: It was a cross-sectional hospital-based study. Both groups were assessed for IR by using homeostatic model assessment of insulin resistance (HOMA-IR) formula. RESULTS: A total of 70 cases and an equal number of controls were studied. IR was observed more in cases (41.4%) compared to controls (17.1%) (P < 0.01). Mean HOMA-IR value was also significantly higher in cases (4.32 ± 4.44) compared to controls (2.27 ± 0.90) (P < 0.05). LIMITATIONS: Low number of cases and controls were taken in the study. Association with hyperlipidemia and metabolic syndrome was not elicited. CONCLUSIONS: AN and acrochordons were found to be associated with IR.

19.
Cell Stem Cell ; 23(2): 252-265.e8, 2018 Aug 02.
Artículo en Inglés | MEDLINE | ID: mdl-30082068

RESUMEN

Defining mechanisms that maintain tissue stem cells during homeostasis, stress, and aging is important for improving tissue regeneration and repair and enhancing cancer therapies. Here, we show that Id1 is induced in hematopoietic stem cells (HSCs) by cytokines that promote HSC proliferation and differentiation, suggesting that it functions in stress hematopoiesis. Genetic ablation of Id1 increases HSC self-renewal in serial bone marrow transplantation (BMT) assays, correlating with decreases in HSC proliferation, mitochondrial biogenesis, and reactive oxygen species (ROS) production. Id1-/- HSCs have a quiescent molecular signature and harbor less DNA damage than control HSCs. Cytokines produced in the hematopoietic microenvironment after γ-irradiation induce Id1 expression. Id1-/- HSCs display a blunted proliferative response to such cytokines and other inducers of chronic proliferation including genotoxic and inflammatory stress and aging, protecting them from chronic stress and exhaustion. Thus, targeting Id1 may be therapeutically useful for improving HSC survival and function during BMT, chronic stress, and aging.


Asunto(s)
Envejecimiento/metabolismo , Células Madre Hematopoyéticas/metabolismo , Proteína 1 Inhibidora de la Diferenciación/deficiencia , Estrés Fisiológico , Animales , Células Cultivadas , Proteína 1 Inhibidora de la Diferenciación/metabolismo , Ratones , Ratones Endogámicos C57BL , Ratones Noqueados
20.
Cell Rep ; 23(11): 3236-3248, 2018 06 12.
Artículo en Inglés | MEDLINE | ID: mdl-29898395

RESUMEN

Fetal globin genes are transcriptionally silenced during embryogenesis through hemoglobin switching. Strategies to derepress fetal globin expression in the adult could alleviate symptoms in sickle cell disease and ß-thalassemia. We identified a zinc-finger protein, pogo transposable element with zinc-finger domain (POGZ), expressed in hematopoietic progenitor cells. Targeted deletion of Pogz in adult hematopoietic cells in vivo results in persistence of embryonic ß-like globin expression without affecting erythroid development. POGZ binds to the Bcl11a promoter and erythroid-specific intragenic regulatory regions. Pogz+/- mice show elevated embryonic ß-like globin expression, suggesting that partial reduction of Pogz expression results in persistence of embryonic ß-like globin expression. Knockdown of POGZ in primary human CD34+ progenitor cell-derived erythroblasts reduces BCL11A expression, a known repressor of embryonic ß-like globin expression, and increases fetal hemoglobin expression. These findings are significant, since new therapeutic targets and strategies are needed to treat ß-globin disorders.


Asunto(s)
Hemoglobina Fetal/metabolismo , Transposasas/genética , Globinas beta/genética , Animales , Proteínas Portadoras/antagonistas & inhibidores , Proteínas Portadoras/genética , Proteínas Portadoras/metabolismo , Diferenciación Celular , Embrión de Mamíferos/metabolismo , Desarrollo Embrionario , Eritroblastos/citología , Eritroblastos/metabolismo , Hemoglobina Fetal/genética , Células Madre Hematopoyéticas/citología , Células Madre Hematopoyéticas/metabolismo , Humanos , Ratones , Ratones Endogámicos C57BL , Ratones Noqueados , Proteínas Nucleares/antagonistas & inhibidores , Proteínas Nucleares/genética , Proteínas Nucleares/metabolismo , Regiones Promotoras Genéticas , Interferencia de ARN , ARN Interferente Pequeño/metabolismo , Proteínas Represoras , Transposasas/antagonistas & inhibidores , Transposasas/metabolismo , Globinas beta/metabolismo
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA