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1.
Wounds ; 36(4): 129-136, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38743859

RESUMEN

BACKGROUND: Recently, micronized adipose tissue (MAT) grafts have shown promising results in wound healing, including diabetic ulcers. OBJECTIVE: To assess the possibility of using 3D printed MAT niche grafts in the management of skin and soft tissue defects resulting from non-melanoma skin cancer (NMSC) resections. MATERIALS AND METHODS: A retrospective feasibility study was conducted on patients with skin and soft tissue defects resulting from NMSC resections. Twenty-one patients were treated using either artificial dermis (n = 11) or MAT niche (n = 10) grafting. Healing time and POSAS scores were compared. The Mann-Whitney U test and the Pearson chi-square test were used in statistical analysis to compare between and within groups based on preoperative and postoperative measurements. RESULTS: Wounds in the MAT niche group reepithelialized significantly faster than those in the artificial dermis group (mean [SD] 39.2 [11.4] days vs 63.7 [34.8] days; P = .04). In the 21 scar parameters evaluated, the MAT niche group demonstrated significantly superior outcomes in only 2 parameters based on operator assessment scores: relief (mean [SD] 1.6 [0.7] vs 2.2 [0.6]; P = .047) and scar contracture (mean [SD] 1.3 [0.5] vs 2.5 [1.0]; P = .011). CONCLUSION: This study proves the feasibility of exploring the effects of MAT niche grafting following NMSC excision on healing time and specific parameters of scarring, including scar relief and scar contracture.


Asunto(s)
Tejido Adiposo , Estudios de Factibilidad , Neoplasias Cutáneas , Piel Artificial , Cicatrización de Heridas , Humanos , Neoplasias Cutáneas/cirugía , Neoplasias Cutáneas/patología , Proyectos Piloto , Masculino , Cicatrización de Heridas/fisiología , Femenino , Estudios Retrospectivos , Tejido Adiposo/trasplante , Anciano , Persona de Mediana Edad , Resultado del Tratamiento , Trasplante de Piel/métodos
2.
Wounds ; 35(1): E22-E28, 2023 01.
Artículo en Inglés | MEDLINE | ID: mdl-36749994

RESUMEN

INTRODUCTION: Adipose-derived stem cells are multipotent precursor cells with the ability to differentiate into cell lineages associated with the regeneration of tissues. OBJECTIVE: The authors investigated the efficacy of AMHAT with 3D bioprinting technology in DFU. MATERIALS AND METHODS: Twenty patients were enrolled in a clinical prospective interventional pilot study. The primary endpoint was a reduction in the size of DFU, and the secondary endpoints were the epithelialization rate and amount of granulation of wound bed at weekly assessments. A bioprinter was used to produce AMHAT in the customized shape of DFU. The data were obtained using photography and computerized digital surface calculation. RESULTS: The mean wound size at the time of hospitalization was 7.529 cm2. All but one of the wounds were completely epithelialized at the ninth week. The mean wound areas decreased at weekly assessments for the first 7 weeks of treatment compared to the pre-application. When the mean decrease in the wound size was compared between consecutive weeks, there were decreases at each of the first 7 weeks. The mean time to the complete closure was 32.20±23.862 days. CONCLUSION: These data indicate that AMHAT is beneficial in terms of ease of application, significant decrease in the wound surface area, no scarring compared to grafting, and full healing times.


Asunto(s)
Diabetes Mellitus , Pie Diabético , Humanos , Estudios Prospectivos , Proyectos Piloto , Cicatrización de Heridas , Tejido Adiposo/trasplante
3.
Gels ; 9(1)2023 Jan 13.
Artículo en Inglés | MEDLINE | ID: mdl-36661832

RESUMEN

Adipose tissue is an abundant source of extracellular substances that support the tissue repair process. This pilot study was carried out to determine the efficacy of 3D-bioprinted autologous adipose tissue grafts on diabetic foot ulcers (DFUs), with fibrin gel used to stabilise the graft. This was a single-arm pilot study in a tertiary hospital that provides diabetic wound care services. A total of 10 patients with a DFU were enrolled, and the primary endpoint was complete healing within 12 weeks. The secondary endpoints were wound size reduction, time to healing, and adverse events. Seven out of ten patients showed complete healing of their DFU within 12 weeks (at 2, 4, 5, 10, and 12 weeks, respectively). The wound size reduction rate was significantly and progressively reduced over time. According to our data, autologous adipose tissue grafting using a 3D bioprinter, with the addition of fibrin gel that acts as a scaffold, promotes wound healing with high-quality skin reconstruction. Throughout this study period, no adverse events were observed.

4.
Plast Reconstr Surg Glob Open ; 10(10): e4588, 2022 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-36320618

RESUMEN

Diabetic foot complications are increasingly burdensome for patients, clinicians, and society. Development of innovative therapies to support good quality basic care is a priority among those with an interest in this area. One of these involves scanning and printing tissues to match and conform to a defect (so-called 3D printing). Methods: A single-arm pilot study of ten consecutive patients with a history of a chronic diabetic foot ulcer (DFU), treated with autologous minimally manipulated homologous adipose tissue (AMHAT), dispensed by a specialized 3D bioprinter, Dr. INVIVO, was performed. Patients with nonhealing DFUs present for more than 4 weeks and refractory to standard-of-care therapies were included. Wounds were treated with a single application of AMHAT, and then followed up weekly for up to 12 weeks, or until the wounds healed. The primary outcome measure was complete epithelialization of the wound up to 12 weeks after the treatment. Secondary outcome measures included wound size and/or volume reduction, assessment of ulcer grade, and time to closure. Results: Five wounds were healed by 5 weeks and one at 8 weeks. The mean percent area reduction at 12 weeks was 78.3% (SD: 33.23). Complete closure was achieved in 60% of wounds. The mean time to closure in these wounds was 49.1 days (95% CI, 29.9-68.3). No adverse events were reported. Conclusions: Single treatment of bioprinted AMHAT appears to be a safe and potentially effective treatment modality for patients with chronic DFUs. Further studies are warranted to explore the full potential of 3D bioprinting for tissue repair in this high-risk population.

5.
J Clin Med ; 11(19)2022 Oct 05.
Artículo en Inglés | MEDLINE | ID: mdl-36233755

RESUMEN

Numerous studies have demonstrated the various properties of micronized adipose tissue (MAT), including angiogenic, anti-inflammatory, and regenerative activities, which can be helpful in wound healing. This exploratory clinical trial aimed to report the efficacy and safety of MAT niche for treating diabetic foot ulcers. Twenty subjects were randomly divided into MAT niche treatment (n = 10) and control groups (n = 10). All patients were followed up weekly for 16 weeks. We evaluated the efficacy of the MAT niche treatment by assessing the (1) reduction in wound area after 4 weeks and (2) percentage of patients who achieved complete wound closure after 16 weeks. All possible adverse events were recorded. The wound area was reduced by 4.3 ± 1.0 cm2 in the treatment group and by 2.0 ± 1.1 cm2 in the control group (p = 0.043). Complete wound healing was achieved after 16 weeks in eight out of 10 patients (80%) in the treatment group and three out of six (50%) in the control group (p = 0.299). No serious adverse events related to MAT niche treatment were observed. Although the present study's findings do not support the use of this therapy to treat foot ulcers of patients with diabetes owing to the small number of patients included and the absence of statistical significance, the results of this pilot preliminary study are promising in that MAT niche autografts may offer the possibility of a simple and effective treatment for diabetic ulcers. Further follow-up studies with a larger number of patients are required to validate our findings.

6.
Int J Low Extrem Wounds ; : 15347346211045625, 2021 Oct 12.
Artículo en Inglés | MEDLINE | ID: mdl-34636693

RESUMEN

Chronic foot ulcers are the leading cause of prolonged hospitalization and loss of social participation in people with diabetes. Conventional management of diabetic foot ulcers (DFU) is associated with slow healing, high cost, and recurrent visits to the hospital. Currently, the application of autologous lipotransfer is more popular, as the regenerative and reparative effects of fat are well established. Herein we report the efficacy of minimally manipulated extracellular matrix (MA-ECM) prepared from autologous homologous adipose tissue by using 3D bioprinting in DFU (test group) in comparison to the standard wound care (control group). A total of 40 subjects were screened and randomly divided into test and control groups. In the test group, the customized MA-ECM was printed as a scaffold from the patient autologous fat using a 3D bioprinter device and applied to the wound directly. The control group received standard wound care and weekly follow-up was done for all the patients. We evaluated the efficacy of this novel technology by assessing the reduction in wound size and attainment of epithelialization. The patients in the test group (n = 17) showed complete wound closure with re-epithelialization approximately within a period of 4 weeks. On the other hand, most of the patients in the control group (n = 16) who received standard wound dressings care showed a delay in wound healing in comparison to the test group. This technique can be employed as a personalized therapeutic method to accelerate diabetic wound healing and may provide a promising potential alternative approach to protect against lower foot amputation a most common complication in diabetes.

7.
J Clin Med ; 10(10)2021 May 16.
Artículo en Inglés | MEDLINE | ID: mdl-34065685

RESUMEN

INTRODUCTION: Early diagnosis of sepsis is paramount to effective management. The present study aimed to compare the prognostic accuracy of presepsin levels and other biomarkers in the assessment of septic shock and mortality risk in cancer patients. MATERIALS AND METHODS: A total of 74 cancer patients were evaluated for presepsin, lactic acid, C-reactive protein (CRP) levels, and white blood cell count (WBC). Specificity and sensitivity values for septic shock and death were compared between four biomarkers in all patients and those with and without acute kidney injury (AKI). RESULTS: A total of 27 and 29 patients experienced septic shock and died, respectively. The area under the curve (AUC) and sensitivity and specificity estimated for presepsin levels for septic shock were 60%, 74%, and 51%, respectively. The corresponding values for mortality were 62%, 72%, and 49%, respectively. In patients without AKI, AUC of presepsin levels for septic shock and death were 62% and 65%, respectively; in those with AKI, these values were 44% and 58%, respectively. Presepsin levels showed higher sensitivity and specificity values than WBC and higher specificity than CRP but were similar to those of lactic acid levels. CONCLUSIONS: Presepsin levels are similar to lactic acid levels in the assessment of septic shock and mortality risk in cancer patients. In patients with AKI, presepsin levels should be considered carefully.

8.
J Phys Ther Sci ; 27(3): 581-3, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25931685

RESUMEN

[Purpose] The purpose of this study was to determine how an exercise program focusing on muscular strength could aid firefighters with chronic lower back pain. [Subjects] The research subjects were randomly assigned to two groups, the experimental group (n=8) and the control (n=8). [Methods] The experimental group performed two types of exercise programs four times per week for 8 weeks under supervision. Tests were performed before and after the 8 weeks of exercise in accordance with the Korea Occupational Safety and Health Agency's program. [Results] At the end of the 8 weeks of the rehabilitation program, abdominal muscular strength were significantly increased in the experimental group, and this indicates that the exercise therapy was effective for improvement of muscular strength. [Conclusion] We found that exercise therapy is an effective intervention that can reduce the pain of patients with chronic lower back pain. The firefighters with chronic lower back pain who participated in this study exhibited enhanced lower back muscular strength and obtained some additional benefits. They need regular exercise.

9.
Nat Commun ; 5: 3793, 2014 May 02.
Artículo en Inglés | MEDLINE | ID: mdl-24786561

RESUMEN

Myogenic regulatory factors such as MyoD and Myf5 lie at the core of vertebrate muscle differentiation. However, E-boxes, the cognate binding sites for these transcription factors, are not restricted to the promoters/enhancers of muscle cell-specific genes. Thus, the specificity in myogenic transcription is poorly defined. Here we describe the transcription factor Ebf3 as a new determinant of muscle cell-specific transcription. In the absence of Ebf3 the lung does not unfold at birth, resulting in respiratory failure and perinatal death. This is due to a hypercontractile diaphragm with impaired Ca(2+) efflux-related muscle functions. Expression of the Ca(2+) pump Serca1 (Atp2a1) is downregulated in the absence of Ebf3, and its transgenic expression rescues this phenotype. Ebf3 binds directly to the promoter of Atp2a1 and synergises with MyoD in the induction of Atp2a1. In skeletal muscle, the homologous family member Ebf1 is strongly expressed and together with MyoD induces Atp2a1. Thus, Ebf3 is a new regulator of terminal muscle differentiation in the diaphragm, and Ebf factors cooperate with MyoD in the induction of muscle-specific genes.


Asunto(s)
Relajación Muscular/fisiología , Proteína MioD/fisiología , ATPasas Transportadoras de Calcio del Retículo Sarcoplásmico/fisiología , Factores de Transcripción/fisiología , Animales , Ratones , Ratones Noqueados , Insuficiencia Respiratoria/genética , ATPasas Transportadoras de Calcio del Retículo Sarcoplásmico/genética
10.
J Phys Ther Sci ; 26(1): 105-9, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-24567686

RESUMEN

[Purpose] The aim of this study was to determine the effects of a 12-week walking program on increasing an individual's self-management and decreasing the risk factors of metabolic syndrome in the older adult population. [Subjects] A total of 31 older adults participated in this study. Eighteen participants in the experimental group and 13 controls completed the pretest and posttest measures. A walking exercise and health education were provided for the experimental group. Data were analyzed by ANCOVAs to examine group differences. [Results] At the end of the 12-week study period, the experimental group showed a significant improvement in individuals' ability to self-manage their health compared to the control group. Also, there were significant differences between the two groups in the total numbers of risk factors of metabolic syndrome, systolic blood pressure and BMI. No significant difference in blood sugar levels, HDL-C, waist circumference, and triglyceride levels were found between the experimental and control group. [Conclusion] This study revealed that a combination of health education and for walking exercise can lead to improved lifestyle management and reduce risk factors of metabolic syndrome for the elderly population of Korea.

11.
J Phys Ther Sci ; 25(7): 765-7, 2013 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-24259848

RESUMEN

This study aimed to identify what impact the thickness differences between the leftside and rightside transversus abdominis (TrA), internal obliquus (IO) and external obliquus (EO) have on balance ability in the abdominal drawing-in maneuver (ADIM) and resting postures. [Subjects and Methods] In this study, 41 young adults were asked to adopt a resting posture and to perform ADIM. The thicknesses of the abdominal muscles (TrA, IO, EO) were measured using ultrasound imaging, Then balance ability was measured, so that a comparative analysis could be carried out. [Results] According to the results, the thicknesses of TrA and IO very significantly increased when ADIM was performed. The changes in thickness of the muscles on the left and right sides showed no significant correlations with balance ability. [Conclusion] According to the study results, the difference in thickness between the left and right side muscles in a normal person is small (symmetric), and the differences in the thickness of TrA and IO on the left and right side reduced when the ADIM, which is a re-education method for abdominal muscles was performed. Therefore, we consider that the ADIM should be used in future clinical trials to induce symmetric contraction of the abdominal muscles. Also, the correlation results of muscle balance and body balance can be used as empirical data.

12.
PLoS One ; 8(11): e80312, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-24265806

RESUMEN

Genetic redundancy poses a major problem to the analysis of gene function. RNA interference allows the down-regulation of several genes simultaneously, offering the possibility to overcome genetic redundancy, something not easily achieved with traditional genetic approaches. Previously we have used a polycistronic miR155-based framework to knockdown expression of three genes of the early B cell factor family in cultured cells. Here we develop the system further by generating transgenic mice expressing the RNAi construct in vivo in an inducible manner. Expression of the transgene from the strong CAG promoter is compatible with a normal function of the basal miRNA/RNAi machinery, and the miR155 framework readily allows inducible expression from the Rosa26 locus as shown by Gfp. However, expression of the transgene in hematopoietic cells does not lead to changes in B cell development and neuronal expression does not affect cerebellar architecture as predicted from genetic deletion studies. Protein as well as mRNA levels generated from Ebf genes in hetero- and homozygous animals are comparable to wild-type levels. A likely explanation for the discrepancy in the effectiveness of the RNAi construct between cultured cells and transgenic animals lies in the efficiency of the sequences used, possibly together with the complexity of the transgene. Since new approaches allow to overcome efficiency problems of RNAi sequences, the data lay the foundation for future work on the simultaneous knockdown of several genes in vivo.


Asunto(s)
Regulación de la Expresión Génica , Silenciador del Gen , Familia de Multigenes , Interferencia de ARN , Animales , Línea Celular , Cerebelo/metabolismo , Regulación hacia Abajo , Células Madre Embrionarias/metabolismo , Expresión Génica , Orden Génico , Marcación de Gen , Ratones , Ratones Transgénicos , Células Precursoras de Linfocitos B/metabolismo , Transactivadores/genética , Transactivadores/metabolismo , Transgenes
13.
J Lipid Res ; 52(12): 2234-2244, 2011 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-21949050

RESUMEN

Mixed background SHP(-/-) mice are resistant to diet-induced obesity due to increased energy expenditure caused by enhanced PGC-1α expression in brown adipocytes. However, congenic SHP(-/-) mice on the C57BL/6 background showed normal expression of PGC-1α and other genes involved in brown adipose tissue thermogenesis. Thus, we reinvestigated the impact of small heterodimer partner (SHP) deletion on diet-induced obesity and insulin resistance using congenic SHP(-/-) mice. Compared with their C57BL/6 wild-type counterparts, SHP(-/-) mice subjected to a 6 month challenge with a Western diet (WestD) were leaner but more glucose intolerant, showed hepatic insulin resistance despite decreased triglyceride accumulation and increased ß-oxidation, exhibited alterations in peripheral tissue uptake of dietary lipids, maintained a higher respiratory quotient, which did not decrease even after WestD feeding, and displayed islet dysfunction. Hepatic mRNA expression analysis revealed that many genes expressed higher in SHP(-/-) mice fed WestD were direct peroxisome proliferator-activated receptor alpha (PPARα) targets. Indeed, transient transfection and chromatin immunoprecipitation verified that SHP strongly repressed PPARα-mediated transactivation. SHP is a pivotal metabolic sensor controlling lipid homeostasis in response to an energy-laden diet through regulating PPARα-mediated transactivation. The resultant hepatic fatty acid oxidation enhancement and dietary fat redistribution protect the mice from diet-induced obesity and hepatic steatosis but accelerate development of type 2 diabetes.


Asunto(s)
Diabetes Mellitus/metabolismo , Obesidad/metabolismo , Receptores Citoplasmáticos y Nucleares/deficiencia , Adipocitos Marrones/citología , Animales , Metabolismo Basal , Diabetes Mellitus/etiología , Diabetes Mellitus/patología , Dieta/efectos adversos , Grasas de la Dieta/efectos adversos , Grasas de la Dieta/metabolismo , Hígado Graso/metabolismo , Regulación de la Expresión Génica , Intolerancia a la Glucosa , Insulina/metabolismo , Metabolismo de los Lípidos , Hígado/metabolismo , Masculino , Ratones , Obesidad/etiología , Obesidad/patología , Oxidación-Reducción , Oxígeno/metabolismo , Fenotipo
14.
J Prev Med Public Health ; 41(4): 225-31, 2008 Jul.
Artículo en Coreano | MEDLINE | ID: mdl-18664728

RESUMEN

OBJECTIVES: Bioterrorism (BT) preparedness and response plans are particularly important among healthcare workers who will be among the first involved in the outbreak situations. This study was conducted to evaluate the current status of education for BT preparedness and response in healthcare-related colleges/junior colleges and to develop learning objectives for use in their regular curricula. METHODS: We surveyed all medical colleges/schools, colleges/junior colleges that train nurses, emergency medical technicians or clinical pathologists, and 10% (randomly selected) of them that train general hygienists in Korea. The survey was conducted via mail from March to July of 2007. We surveyed 35 experts to determine if there was a consensus of learning objectives among healthcare workers. RESULTS: Only 31.3% of medical colleges/schools and 13.3% of nursing colleges/junior colleges had education programs that included BT preparedness and responses in their curricula. The most common reason given for the lack of BT educational programs was 'There is not much need for education regarding BT preparedness and response in Korea'. None of the colleges/junior colleges that train clinical pathologists, or general hygienists had an education program for BT response. After evaluating the expert opinions, we developed individual learning objectives designed specifically for educational institutions. CONCLUSIONS: There were only a few colleges/junior colleges that enforce the requirement to provide education for BT preparedness and response in curricula. It is necessary to raise the perception of BT preparedness and response to induce the schools to provide such programs.


Asunto(s)
Bioterrorismo , Planificación en Desastres/organización & administración , Escuelas para Profesionales de Salud/organización & administración , Curriculum , Humanos , Corea (Geográfico)
15.
Liver Transpl ; 14(6): 845-54, 2008 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-18324658

RESUMEN

Hepatic ischemia reperfusion (IR) injury is a major clinical problem during the perioperative period and occurs frequently after major hepatic resection or liver transplantation. Exogenous and endogenous A(1) adenosine receptor (A(1)AR) activation protects against renal IR injury. In this study, we questioned whether exogenous and endogenous A(1)AR activation protects against hepatic IR injury in vivo. A(1)AR wild-type (WT) or knockout mice were subjected to 60 minutes of partial hepatic IR. Some animals were treated with a selective A(1)AR agonist, 2-chloro-N(6)-cyclopentyladenosine (CCPA; 0.1 mg/kg), or a selective A(1)AR antagonist, 8-cyclopentyl-1,3-dipropylxanthine (DPCPX; 0.4 mg/kg), 15 minutes before hepatic ischemia. Twenty-four hours after hepatic IR, the A(1) knockout mice and DPCPX-treated A(1) wild-type (A(1)WT) mice developed significantly worse liver injury (alanine aminotransferase, liver necrosis, neutrophil infiltration, and apoptosis) compared to A(1)AR WT mice. However, the selective A(1)AR agonist CCPA failed to protect against hepatic IR injury in A(1)WT mice. Our results show that the endogenous A(1)ARs protect against hepatic IR injury in vivo by primarily reducing apoptosis and necrosis with subsequent reductions in proinflammatory neutrophil infiltration. However, in contrast to the kidneys, in which exogenous A(1)AR activation protected against IR injury, exogenous A(1)AR activation failed to protect against liver injury after IR. We conclude that endogenous A(1)AR activation prevents worsened murine liver IR injury primarily by reducing necrotic and apoptotic cell death. Harnessing the mechanisms of cytoprotection with endogenous A(1)AR activation may lead to new therapies for perioperative hepatic IR injury.


Asunto(s)
Hígado/patología , Receptor de Adenosina A1/metabolismo , Daño por Reperfusión/patología , Daño por Reperfusión/prevención & control , Alanina Transaminasa/metabolismo , Animales , Apoptosis , Heterocigoto , Etiquetado Corte-Fin in Situ , Inflamación , Trasplante de Hígado , Masculino , Ratones , Ratones Noqueados , Necrosis , Neutrófilos/metabolismo
16.
Am J Physiol Renal Physiol ; 293(6): F1847-57, 2007 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-17928414

RESUMEN

We showed previously that activation of A(1) adenosine receptors (AR) protects against renal ischemia-reperfusion (IR) injury in rats and mice. In the heart, transient A(1)AR activation produces biphasic protective effects: acute protection wanes after several hours but protective effects return 24-72 h later (second window of protection). In this study, we determined whether A(1)AR activation produces delayed renal protection and elucidated the mechanisms of acute and delayed renal protection. A(1)AR wild-type mice were subjected to 30-min renal ischemia and 24 h of reperfusion to produce acute renal failure. Pretreatment with a selective A(1)AR agonist 2-chloro-N(6)-cyclopentyladenosine (CCPA; 0.1 mg/kg bolus ip) either 15 min or 24 h before renal ischemia protected against renal IR injury and reduced renal corticomedullary necrosis, apoptosis, and inflammation. Transient A(1)AR activation led to phosphorylation of extracellular signal-regulated protein kinase mitogen-activated protein kinase (ERK MAPK), Akt, and heat shock protein 27 (HSP27). Moreover, induction of HSP27 and Akt occurred with CCPA treatment. Inhibition of PKC with chelerythrine prevented acute but not delayed renal protection with A(1)AR activation. Moreover, deletion of PI3Kgamma or inhibition of Akt, but not inhibition of ERK, prevented delayed and acute renal protection with A(1)AR activation. Inhibition of G(i/o) with pertussis toxin obliterated both acute and delayed A(1)AR-mediated renal protection. In contrast to renal protection with delayed ischemic preconditioning, nitric oxide synthase activity was not induced with delayed A(1)AR-mediated renal protection. Therefore, transient activation of renal A(1)AR led to acute as well as delayed protective effects against renal IR injury via distinct signaling pathways.


Asunto(s)
Enfermedades Renales/prevención & control , Receptor de Adenosina A1/fisiología , Daño por Reperfusión/prevención & control , Animales , Apoptosis/efectos de los fármacos , Apoptosis/genética , Apoptosis/fisiología , Western Blotting , Creatinina/sangre , Fragmentación del ADN , Quinasas MAP Reguladas por Señal Extracelular/fisiología , Proteínas de Choque Térmico/genética , Proteínas de Choque Térmico/fisiología , Inmunohistoquímica , Corteza Renal/enzimología , Corteza Renal/fisiología , Pruebas de Función Renal , Ratones , Ratones Noqueados , Proteínas Quinasas Activadas por Mitógenos/fisiología , Necrosis , Óxido Nítrico Sintasa de Tipo II/genética , Óxido Nítrico Sintasa de Tipo II/fisiología , Fosfatidilinositol 3-Quinasas/genética , Fosfatidilinositol 3-Quinasas/fisiología , Proteína Quinasa C/fisiología , Proteínas Proto-Oncogénicas c-akt/fisiología , Receptor de Adenosina A1/genética , Daño por Reperfusión/patología , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa
17.
Am J Nephrol ; 27(4): 416-24, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-17622749

RESUMEN

BACKGROUND/AIMS: We have previously demonstrated that clinically utilized volatile anesthetics protect against renal ischemia reperfusion injury in rats in vivo and reduce necrosis in vitro via activation of ERK and Akt and by upregulating HSP70. In this study, we further deciphered the upstream cellular signaling mechanism(s) of volatile anesthetic-mediated antinecrotic effects in vitro. We hypothesized that volatile anesthetics perturb the structure of the plasma membrane lipid bilayer, causing externalization of phosphatidylserine (PS) to the outer surface on renal tubule cells leading to the increased generation of transforming growth factor-beta1 (TGF-beta1), a cytokine with antinecrotic properties. METHODS AND RESULTS: In human proximal tubule (HK-2) cell culture, 16-hour exposure to volatile anesthetics (isoflurane, halothane, sevoflurane) caused membrane externalization of PS detected by positive annexin-V staining and increased the release of TGF-beta1 into the cell culture media. Exogenous TGF-beta1 induced protection and neutralizing TGF-beta1 antibody prevented the cytoprotection by volatile anesthetics against hydrogen peroxide-induced HK-2 cell necrosis. CONCLUSIONS: Volatile anesthetics induce a cytoprotective signaling cascade in proximal tubule cells via membrane externalization of PS initiating TGF-beta1-mediated cytoprotection.


Asunto(s)
Anestésicos por Inhalación/farmacología , Membrana Celular/efectos de los fármacos , Túbulos Renales Proximales/efectos de los fármacos , Fosfatidilserinas/metabolismo , Factor de Crecimiento Transformador beta/metabolismo , Anestésicos por Inhalación/uso terapéutico , Anticuerpos/farmacología , Línea Celular , Membrana Celular/metabolismo , Humanos , Peróxido de Hidrógeno , Túbulos Renales Proximales/metabolismo , Túbulos Renales Proximales/patología , Necrosis/metabolismo , Necrosis/prevención & control , Transcripción Genética , Factor de Crecimiento Transformador beta/inmunología
18.
J Med Virol ; 73(1): 85-90, 2004 May.
Artículo en Inglés | MEDLINE | ID: mdl-15042653

RESUMEN

Serological and virological studies were carried out of a mumps outbreak which occurred in one region, Yoeju County, Southeast of Seoul in Korea from September to December, 1999. Sera from 736 children at 8-13 years of age of patients with mumps and healthy children were tested for mumps-specific antibodies by enzyme immunoassay. The overall IgM positive rate was 7.6% (56/736), compared with 69.8% (514/736) for IgG. Of the 49 children with both IgG and IgM, 32 were also confirmed by both clinical and serological diagnosis. IgM antibodies were detected even in the samples collected up to 3 months after the onset of symptoms. Although 436 children had been vaccinated before the outbreak, 27 (6.2%) were found to be IgM positive, particularly 6 (4.4%) of 136 were positive serologically despite a second-dose vaccinees. Sequence analysis of the small hydrophobic (SH) gene of 4 mumps viruses isolated from 42 saliva specimens revealed that these were related to the genotype H, but distinguishable from European strains. This is the first study on the outbreak due to mumps virus genotype H and provides information to assess the understanding of recent outbreaks of mumps in Korea.


Asunto(s)
Brotes de Enfermedades , Virus de la Parotiditis/genética , Paperas/epidemiología , Paperas/virología , Adolescente , Secuencia de Aminoácidos , Anticuerpos Antivirales/sangre , Especificidad de Anticuerpos , Niño , Femenino , Genes Virales , Genotipo , Humanos , Inmunoglobulina G/sangre , Inmunoglobulina M/sangre , Corea (Geográfico)/epidemiología , Masculino , Datos de Secuencia Molecular , Paperas/inmunología , Virus de la Parotiditis/inmunología , Virus de la Parotiditis/aislamiento & purificación , Filogenia , Homología de Secuencia de Aminoácido , Proteínas Virales/genética
19.
Virus Genes ; 28(2): 201-5, 2004 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-14976420

RESUMEN

The complete nucleotide sequence of mumps virus isolated in Korea, Dg1062/Korea/98 (Dg1062), was determined. As other mumps viruses, its genome was to be 15,384 nucleotides (nts) in length and encoded seven proteins. The both 5' and 3' ends were confirmed to be 55 and 24 nts by RACE method, respectively. The full-length nucleotide sequence of Dg1062 isolate differed from other strains by 2.9-6.8% in the nucleotide sequence level, resulting in 206 nucleotide and 54 amino acid substitutions which were observed in only Dg1062 isolate relative to the consensus sequences of other strains. Despite the variations of amino acids over the full genome including HN gene, it might be considered that this isolate have no significant variations in the antigenic sites. This result is the first report of full-length genome of genotype I strain and provides an overview on the diversity of genetic characteristics of circulating mumps virus.


Asunto(s)
Virus de la Parotiditis/genética , Sustitución de Aminoácidos , Secuencia de Bases , Clonación Molecular , Secuencia de Consenso , ADN Viral/genética , Variación Genética , Genotipo , Humanos , Corea (Geográfico) , Datos de Secuencia Molecular , Virus de la Parotiditis/clasificación , Virus de la Parotiditis/aislamiento & purificación , Proteínas de la Nucleocápside/genética
20.
Cornea ; 23(1): 93-6, 2004 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-14701966

RESUMEN

PURPOSE: To report a case of keratoconus in a patient with hyper-IgE syndrome. METHODS: A case report of a 28-year-old man with hyperimmunoglobulin E syndrome (HIES) who presented with chronic eczematous dermatitis of the eyelids and severe eye itching. RESULTS: Best corrected visual acuity was 20/25 in the right eye and 20/30 in the left eye. There was a scissoring reflex in both eyes with retinoscopy. Biomicroscopy of the cornea was normal, but corneal topography showed bilateral keratoconus. CONCLUSIONS: It is difficult to establish a direct correlation between keratoconus and HIES due to the rarity of the latter disorder. It is, however, important to consider this association and obtain a corneal topography to rule out corneal ectasia in patients with HIES.


Asunto(s)
Síndrome de Job/complicaciones , Queratocono/complicaciones , Adulto , Topografía de la Córnea , Diagnóstico Diferencial , Humanos , Queratocono/diagnóstico , Queratocono/fisiopatología , Masculino , Agudeza Visual
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