RESUMEN
BACKGROUND: Qualitative research on cancer survivors' need for comprehensive cancer survivorship care within the health care system is limited. Our study aimed to understand cancer survivors' and health professionals' expectations and perceptions for developing a comprehensive cancer survivorship care system in South Korea. METHODS: An exploratory qualitative study was conducted. A total of 16 subjects (11 cancer survivors and 5 health professionals) were purposively sampled from Regional Cancer Survivorship Centers or Cancer Survivor Clinics in Korea. In-depth semi-structured online or face-to-face interviews were conducted. Six steps of thematic analysis were used to analyze data. RESULTS: The following four primary themes emerged from the interviews: 1) introducing a customized follow-up care system to improve continuity of survivorship care, 2) implementing educational strategies for both survivors and health professionals to manage changed health, and 3) accepting cancer survivors as companions. These three themes included a total of nine subthemes. As a result, the comprehensive survivorship model identified needs in terms of 1) changes in the medical healthcare system and core services that can accommodate the cancer survivors' condition and 2) necessary care services and social support for cancer survivors. CONCLUSIONS: This study identified the existing gaps in Korea's current healthcare system regarding comprehensive cancer survivorship care for cancer survivors. Further research on eHealth-based counseling and educational support, the payment models of cancer survivorship care within universal health coverage, and changing social perceptions to strengthen the biopsychosocial needs of cancer survivors is needed.
Asunto(s)
Supervivientes de Cáncer , Neoplasias , Humanos , Supervivientes de Cáncer/psicología , Motivación , Neoplasias/terapia , Neoplasias/psicología , Sobrevivientes/psicología , Atención a la Salud , Investigación Cualitativa , República de Corea/epidemiología , Percepción SocialRESUMEN
BACKGROUND: Recent studies raise concerns that arthroscopic meniscectomy (AM) for degenerative tear may be detrimental to the maintenance of the joint structure. This study was performed to examine the rate of total knee replacement (TKR) among patients with knee osteoarthritis (OA) who underwent AM for meniscal tears and compare this rate with those who did not. METHODS: A retrospective cohort study was conducted using the National Health Insurance Database of South Korea. Among knee OA patients aged 50-79, those who were treated with AM due to meniscal damage from 2007 to 2009 were selected as the AM group while those not treated with AM despite the presence of meniscal damage were selected as control group. Both were matched based on a propensity score and followed-up until the earliest occurrence of: TKR, death, or 10 years. Cox proportional hazards models were used to compare the outcome. RESULTS: A total of 36,974 patients were included in AM groups and non-AM group after 1:1 matching. TKR occurred in 9.62% and 7.64% in AM and non-AM groups with the average duration after meniscectomy of 5.88 ± 2.77 and 5.50 ± 2.94 years, respectively. After adjustment for baseline confounders, the TKR rate in the AM group was calculated to be 25% higher than that in the non-AM group (subdistribution hazard ratio, 1.25; 95% confidence interval, 1.16-1.34). The mortality rate was 5.20%, which did not significantly differ between groups. CONCLUSION: OA patients who underwent AM for the meniscal injury had higher incidence of TKR up to 10 years of follow-up than the non-operated group. The greater TKR utilization observed in patients undergoing AM merits caution when treating OA patients with meniscal injury.
Asunto(s)
Artroplastia de Reemplazo de Rodilla , Osteoartritis de la Rodilla , Humanos , Meniscectomía/efectos adversos , Osteoartritis de la Rodilla/cirugía , Estudios de Cohortes , Estudios Retrospectivos , Artroscopía/efectos adversosRESUMEN
Crystalline metal-organic frameworks (MOFs) are extensively used in areas such as gas storage and small-molecule drug delivery. Although Cu-BTC (1, MOF-199, BTC: benzene-1,3,5-tricarboxylate) has versatile applications, its NO storage and release characteristics are not amenable to therapeutic usage. In this work, micro-sized Cu-BTC was prepared solvothermally and then processed by ball-milling to prepare nano-sized Cu-BTC (2). The NO storage and release properties of the micro- and nano-sized Cu-BTC MOFs were morphology dependent. Control of the hydration degree and morphology of the NO delivery vehicle improved the NO release characteristics significantly. In particular, the nano-sized NO-loaded Cu-BTC (NO⊂nano-Cu-BTC, 4) released NO at 1.81 µmol·mg-1 in 1.2 h in PBS, which meets the requirements for clinical usage. The solid-state structural formula of NO⊂Cu-BTC was successfully determined to be [CuC6H2O5]·(NO)0.167 through single-crystal X-ray diffraction, suggesting no structural changes in Cu-BTC upon the intercalation of 0.167 equivalents of NO within the pores of Cu-BTC after NO loading. The structure of Cu-BTC was also stably maintained after NO release. NO⊂Cu-BTC exhibited significant antibacterial activity against six bacterial strains, including Gram-negative and positive bacteria. NO⊂Cu-BTC could be utilized as a hybrid NO donor to explore the synergistic effects of the known antibacterial properties of Cu-BTC.
Asunto(s)
Cobre , Óxido Nítrico , Antibacterianos/farmacología , Benceno , Cobre/química , Ácidos TricarboxílicosRESUMEN
BACKGROUND: Meniscal tears are commonly observed in patients with knee osteoarthritis (OA), however, clinical significance of such lesions detected by magnetic resonance imaging is in many cases unclear. This study aimed to determine the clinical effectiveness of arthroscopic partial meniscectomy (APM) compared with non-operative care in patients with knee OA. METHOD: We used existing systematic reviews with updates of latest studies. Three randomized controlled studies were selected, where two studies compared the effects of APM plus physical therapy (PT) with PT alone and one compared APM alone and PT alone. While 1 study exclusively included OA patients, 2 studies included 21.1 and 12% of patients with no radiographic OA. Patients with knee locking were unanimously excluded. RESULTS: Upon comparison of APM plus PT and PT alone, there was no significant difference observed in knee function, physical activity, or adverse events. Knee pain was observed to be significantly lower in the APM plus PT group at 6 months, but there was no difference between the two groups at 12 and 24 months. With respect to the comparison between APM alone and PT alone, PT was non-inferior based on the criteria for knee function during 24 months; however, knee pain was significantly reduced in the APM alone group. CONCLUSIONS: Our study showed that knee pain was significantly improved in the APM group compared to non-operative care group at 6 months and over 24 months. Our result was based on only 3 randomized controlled trials (RCTs) revealing a significant knowledge gap, hence demanding more high-quality RCTs in OA patients. TRIAL REGISTRATION: PROSPERO Identifier: CRD42020215965.
Asunto(s)
Meniscectomía , Modalidades de Fisioterapia , Lesiones de Menisco Tibial/terapia , Artroplastia de Reemplazo de Rodilla/estadística & datos numéricos , Humanos , Articulación de la Rodilla/fisiología , Meniscectomía/efectos adversos , Osteoartritis de la Rodilla/patología , Dolor/etiología , Factores de Riesgo , Lesiones de Menisco Tibial/cirugíaRESUMEN
Polyurethane foams (PUFs) have attracted attention as biomaterials because of their low adhesion to the wound area and suitability as biodegradable or bioactive materials. The composition of the building blocks for PUFs can be controlled with additives, which provide excellent anti-drug resistance and biocompatibility. Herein, nanosized Cu-BTC (copper(II)-benzene-1,3,5-tricarboxylate) was incorporated into a PUF via the crosslinking reaction of castor oil and chitosan with toluene-2,4-diisocyanate, to enhance therapeutic efficiency through the modification of the surface of PUF. The physical and thermal properties of the nanosized Cu-BTC-incorporated PUF (PUF@Cu-BTC), e.g., swelling ratio, phase transition, thermal gravity loss, and cell morphology, were compared with those of the control PUF. The bactericidal activities of PUF@Cu-BTC and control PUF were evaluated against Pseudomonas aeruginosa, Klebsiella pneumoniae, and methicillin-resistant Staphylococcus aureus. PUF@Cu-BTC exhibited selective and significant antibacterial activity toward the tested bacteria and lower cytotoxicity for mouse embryonic fibroblasts compared with the control PUF at a dose of 2 mg mL-1. The Cu(II) ions release test showed that PUF@Cu-BTC was stable in phosphate buffered saline (PBS) for 24 h. The selective bactericidal activity and low cytotoxicity of PUF@Cu-BTC ensure it is a candidate for therapeutic applications for the drug delivery, treatment of skin disease, and wound healing.
Asunto(s)
Antibacterianos/administración & dosificación , Materiales Biocompatibles/química , Cobre/administración & dosificación , Estructuras Metalorgánicas/administración & dosificación , Poliuretanos/química , Antibacterianos/química , Antibacterianos/farmacología , Cobre/química , Cobre/farmacología , Portadores de Fármacos/química , Infecciones por Bacterias Gramnegativas/tratamiento farmacológico , Infecciones por Bacterias Gramnegativas/prevención & control , Humanos , Klebsiella pneumoniae/efectos de los fármacos , Estructuras Metalorgánicas/química , Estructuras Metalorgánicas/farmacología , Staphylococcus aureus Resistente a Meticilina/efectos de los fármacos , Pseudomonas aeruginosa/efectos de los fármacosRESUMEN
PURPOSE: The purpose of the study was to evaluate health-related quality of life (HRQoL) and depression in community-dwelling cancer survivors using structured questionnaires and propensity score matching (PSM). METHODS: Subjects (age ≥ 30 years) who participated in the Sixth Korean National Health and Nutritional Exam Survey completed the EuroQoL5 Dimensions (EQ-5D) and Patient Health Questionnaire (PHQ-9). For the analysis, participants were divided into a cancer survivor group and a group consisting of the general cancer-free population. We compared PHQ-9 and EQ-5D Utility Index scores between the two groups, while controlling for underlying baseline demographic and clinical differences between groups using PSM. Additionally, we divided cancer survivors into two group (< 5 vs. ≥ 5 years since cancer diagnosis), and we evaluated whether the cancer prevalence period was associated with the EQ-5D Utility Index score. RESULT: Of all 4124 subjects, 208 cancer survivors were matched with 624 controls using PSM. PHQ-9 and EQ-5D scores in cancer survivors were not different from the general population. In unadjusted subgroup analyses, PHQ-9 scores and EQ-5D proportion of subjects with anxiety/depression (23.3% vs. 7.6%) were higher in cancer survivors with < 5 years since cancer diagnosis compared to those with ≥ 5 years. In multivariate analyses, predictors of depression in cancer survivors included household income and employment status, and predictors of HRQoL-included household income and subjective perceived health status. Period since the cancer diagnosis was not a predictor of either depression or HRQoL. CONCLUSIONS: Depression and HRQoL in cancer survivors were similar to that experienced by the general population, and household income, perceived subjective health status and employment status were the main factors affecting depression and HRQoL in cancer survivors.
Asunto(s)
Supervivientes de Cáncer/psicología , Depresión/psicología , Trastorno Depresivo/psicología , Autoevaluación Diagnóstica , Calidad de Vida/psicología , Autoinforme/estadística & datos numéricos , Anciano , Estudios Transversales , Femenino , Estado de Salud , Humanos , Masculino , Persona de Mediana Edad , Neoplasias/terapia , Puntaje de Propensión , República de Corea , Encuestas y CuestionariosRESUMEN
The aim of this study was to (1) develop a case-based combination of online lectures and simulations for function-focused care by nursing home interdisciplinary caregivers and (2) evaluate participants' increasing shared team and task knowledge by surrogate measures of team process and team performance. The study comprised the following steps: (1) the design of a learning module using a shared understanding of function-focused care as a shared mental model; (2) the establishment of two computer programs for online lectures and simulations using cases involving older adults with disabilities; and (3) testing the educational programs using a repeated-measures design. Participants were 61 interdisciplinary caregivers from seven nursing homes in four regions. Data from participants' team process and team performance were collected pre test, post online lecture, and post simulation. Repeated-measures analysis of variance showed that the mean scores for scales of "transactive memory system," "knowledge sharing and utilization," "team outcomes," "motivation for learning transfer," "self-efficacy," "interpersonal understanding," "proactivity in problem solving," and "function-focused care knowledge" differed significantly between the time points. The results indicate that a case-based program of a combination of online lectures and simulations elicits significant improvements in participants' team process and team performance.
Asunto(s)
Simulación por Computador , Instrucción por Computador , Relaciones Interprofesionales , Entrenamiento Simulado , Personas con Discapacidad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Casas de SaludRESUMEN
Hypoxia is an adverse prognostic feature of solid cancers that may be overcome with hypoxia-activated prodrugs (HAPs). Tirapazamine (TPZ) is a HAP which has undergone extensive clinical evaluation in this context and stimulated development of optimized analogues. However the subcellular localization of the oxidoreductases responsible for mediating TPZ-dependent DNA damage remains unclear. Some studies conclude only nuclear-localized oxidoreductases can give rise to radical-mediated DNA damage and thus cytotoxicity, whereas others identify a broader role for endoplasmic reticulum and cytosolic oxidoreductases, indicating the subcellular location of TPZ radical formation is not a critical requirement for DNA damage. To explore this question in intact cells we engineered MDA-231 breast cancer cells to express the TPZ reductase human NADPH: cytochrome P450 oxidoreductase (POR) harboring various subcellular localization sequences to guide this flavoenzyme to the nucleus, endoplasmic reticulum, cytosol or inner surface of the plasma membrane. We show that all POR variants are functional, with differences in rates of metabolism reflecting enzyme expression levels rather than intracellular TPZ concentration gradients. Under anoxic conditions, POR expression in all subcellular compartments increased the sensitivity of the cells to TPZ, but with a fall in cytotoxicity per unit of metabolism (termed 'metabolic efficiency') when POR is expressed further from the nucleus. However, under aerobic conditions a much larger increase in cytotoxicity was observed when POR was directed to the nucleus, indicating very high metabolic efficiency. Consequently, nuclear metabolism results in collapse of hypoxic selectivity of TPZ, which was further magnified to the point of reversing O2 dependence (oxic > hypoxic sensitivity) by employing a DNA-affinic TPZ analogue. This aerobic hypersensitivity phenotype was partially rescued by cellular copper depletion, suggesting the possible involvement of Fenton-like chemistry in generating short-range effects mediated by the hydroxyl radical. In addition, the data suggest that under aerobic conditions reoxidation strictly limits the TPZ radical diffusion range resulting in site-specific cytotoxicity. Collectively these novel findings challenge the purported role of intra-nuclear reductases in orchestrating the hypoxia selectivity of TPZ.
Asunto(s)
Antineoplásicos/química , Hipoxia/tratamiento farmacológico , NADPH-Ferrihemoproteína Reductasa/genética , Profármacos/química , Tirapazamina/química , Antineoplásicos/farmacología , Ingeniería Celular , Hipoxia de la Célula/efectos de los fármacos , Línea Celular Tumoral , Membrana Celular/efectos de los fármacos , Núcleo Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Cobre/metabolismo , Daño del ADN/efectos de los fármacos , Daño del ADN/genética , Humanos , Modelos Biológicos , NADPH-Ferrihemoproteína Reductasa/metabolismo , NADPH-Ferrihemoproteína Reductasa/ultraestructura , Oxígeno/metabolismo , Profármacos/metabolismo , Tirapazamina/metabolismoRESUMEN
Since various groups of older adults with different conditions and levels of function coexist in nursing homes, it is necessary to develop integrated care strategies through collaboration among experts across related fields. The purposes of this study are to identify the regularity of information sharing in managing daily function for older adults, with a special focus on interdisciplinary cooperation, and to explore a practical care strategy for nursing home residents. The collaborative methods of network and thematic analysis were done by conducting in-depth interviews with 33 interdisciplinary experts working at seven nursing homes. This study proposed three relationships and three themes as interrelated key factors for providing interdisciplinary care to the elderly at various levels of function based on the experiences accumulated by the practitioners. First, independent sharing is required to make professional judgments about how daily function in older adults changes from reported baselines. Second, practitioners accurately judge clinical situations and supplement experts' judgments through partial sharing. Finally, all interdisciplinary consensus through complete sharing achieves the ultimate goal of maintaining remaining function in older adults. These findings can be the first step in developing practical care guidelines for interdisciplinary use, and the results can be used to develop integrated assessment and intervention strategies.
Asunto(s)
Difusión de la Información , Casas de Salud , Grupo de Atención al Paciente , Adulto , Femenino , Humanos , Entrevistas como Asunto , Masculino , Personal de Enfermería , Calidad de VidaRESUMEN
PURPOSE: The aim of this study was to assess the association between sarcopenia and cardiovascular disease (CVD) risk in cancer survivors. METHODS: We analyzed a consecutive series of 683 cancer survivors from the Korean National Health and Nutritional Exam Survey (2008-2011 years). Sarcopenia was defined as the appendicular skeletal muscle mass divided by weight (Kg) < 1 standard deviation below the sex-specific healthy population aged 20-39 years. CVD risks were assessed using the Framingham Risk Score (FRS), which were divided by tertile. Predictors of higher shift of FRS tertile by sex were calculated by stratified ordinal logistic regression analyses. RESULTS: Proportions of sarcopenia were 24.2% in males and 22.5% in females. Sarcopenic survivors were more likely to have a higher body mass index, waist circumference, blood pressure and fasting glucose level, and a lower high-density lipoprotein compared to those without sarcopenia. Sarcopenia was associated with a higher shift of FRS tertile (common odds ratio, 2.67; 95% confidence interval, 1.18-6.52, P < 0.001) in males. However, this association was not significant in female survivors. CONCLUSIONS: Sarcopenia was associated with an increased CVD risk in Korean male cancer survivors. Interventions to prevent sarcopenia may be necessary to improve cardiovascular burden in cancer survivors.
Asunto(s)
Supervivientes de Cáncer/psicología , Enfermedades Cardiovasculares/etiología , Sarcopenia/complicaciones , Enfermedades Cardiovasculares/patología , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Medición de Riesgo , Factores de Riesgo , Sarcopenia/patologíaRESUMEN
The common method for liberating proteins from Saccharomyces cerevisiae cells involves mechanical cell disruption using glass beads and buffer containing inhibitors (protease, phosphatase and/or kinase inhibitors), followed by centrifugation to remove cell debris. This procedure requires the use of costly inhibitors and is laborious, in particular when many samples need to be processed. Also, enzymatic reactions can still occur during harvesting and cell breakage. As a result low-abundance and labile proteins may be degraded, and enzymes such as kinases and phosphatases may still modify proteins during and after cell lysis. We believe that our rapid sample preparation method helps overcome the above issues and offers the following advantages: (a) it is cost-effective, as no inhibitors and breaking buffer are needed; (b) cell breakage is fast (about 15 min) since it only involves a few steps; (c) the use of formaldehyde inactivates endogenous proteases prior to cell lysis, dramatically reducing the risk of protein degradation; (d) centrifugation steps only occur prior to cell lysis, circumventing the problem of losing protein complexes, in particular if cells were treated with formaldehyde intended to stabilize and capture large protein complexes; and (e) since formaldehyde has the potential to instantly terminate protein activity, this method also allows the study of enzymes in live cells, i.e. in their true physiological environment, such as the short-term effect of a drug on enzyme activity. Taken together, the rapid sample preparation procedure provides a more accurate snapshot of the cell's protein content at the time of harvesting. Copyright © 2017 John Wiley & Sons, Ltd.
Asunto(s)
Métodos Analíticos de la Preparación de la Muestra/economía , Western Blotting , Factor 2 Eucariótico de Iniciación/análisis , Proteínas de Saccharomyces cerevisiae/aislamiento & purificación , Saccharomyces cerevisiae/química , Análisis Costo-Beneficio , Electroforesis en Gel de Poliacrilamida , Factor 2 Eucariótico de Iniciación/aislamiento & purificación , Formaldehído/química , Fosforilación , Proteolisis , Saccharomyces cerevisiae/crecimiento & desarrollo , Proteínas de Saccharomyces cerevisiae/análisisRESUMEN
In eukaryotes, amino acid deprivation leads to the accumulation of uncharged tRNAs that are detected by Gcn2 (general control non-derepressible 2), which in turn phosphorylates eIF2α (α-subunit of eukaryotic translation initiation factor 2), an essential process for overcoming starvation. In Saccharomyces cerevisiae, sensing amino acid shortages requires that Gcn2 binds directly to its effector protein Gcn1 and both must associate with the ribosome. Our hypothesis is that uncharged tRNAs occur in the ribosomal A-site and that Gcn1 is directly involved in transfer of this starvation signal to Gcn2. In the present paper, we provide evidence that Gcn1 directly contacts the small ribosomal protein S10 (Rps10). Gcn1 residues 1060-1777 showed a yeast two-hybrid (Y2H) interaction with Rps10A. In vitro, Rps10A or Rps10B co-precipitated Gcn1[1060-1777] in an RNA-independent manner. rps10AΔ or rps10BΔ strains showed reduced eIF2α phosphorylation under replete conditions and shortly after onset of starvation, suggesting that Gcn1-mediated Gcn2 activation was impaired. Overexpression of GST-tagged Rps10 reduced growth under amino acid starvation and this was exacerbated by the Gcn1-M7A mutation known to impair Gcn1-ribosome interaction and Gcn2 activity. Under amino acid starvation, eEF3 (eukaryotic translation elongation factor 3) overexpression, known to weaken Gcn1 function on the ribosome, exacerbated the growth defect of rps10AΔ or rps10BΔ strains. Taken together, these data support the idea that Gcn1 contacts ribosome-bound Rps10 to efficiently mediate Gcn2 activation.
Asunto(s)
Proteínas de Arabidopsis/metabolismo , Factores de Elongación de Péptidos/metabolismo , Proteínas Serina-Treonina Quinasas/metabolismo , Proteínas Ribosómicas/metabolismo , Proteínas de Saccharomyces cerevisiae/metabolismo , Proteínas de Schizosaccharomyces pombe/metabolismo , Proteínas de Arabidopsis/genética , Activación Enzimática/fisiología , Técnicas de Silenciamiento del Gen , Factores de Elongación de Péptidos/genética , Proteínas Serina-Treonina Quinasas/genética , Proteínas Ribosómicas/genética , Proteínas de Saccharomyces cerevisiae/genética , Proteínas de Schizosaccharomyces pombe/genéticaRESUMEN
BACKGROUND: Studies have compared diabetes management quality indicators, focusing on physiological markers such as hemoglobin A1c, between cancer survivors with diabetes and general diabetes patients. However, research comparing differences in diabetes self-management behaviors and the factors influencing them between these groups is lacking. OBJECTIVES: This study aimed to compare self-management behaviors, guided by the information-motivation-behavior model, between cancer survivors with diabetes and general diabetes patients. In addition, we aimed to identify differences in factors such as diabetes knowledge, attitudes, family support, and self-efficacy that may influence diabetes self-management behaviors in both groups. METHODS: A total of 125 cancer survivors with diabetes and 126 general diabetes patients participated in this cross-sectional study. A structured questionnaire assessed demographics, diabetes knowledge, attitudes, self-efficacy, and self-management behaviors. RESULTS: Regarding diabetes education, 47.0% of cancer survivors and 61.6% of general diabetes patients received education. The cancer survivors had lower diabetes knowledge scores (10.30 ± 4.15, P < .001), a lower perceived value of strict blood glucose control (4.10 ± 0.56, P < .001), and less family support (15.50 ± 7.50, P = .019) than the patients without cancer (13.51 ± 3.84, 4.25 ± 0.65, and 17.57 ± 6.40, respectively). CONCLUSION: This study reveals significant differences in diabetes self-management between cancer survivors and general diabetes patients. Cancer survivors showed lower diabetes knowledge, glucose control perception, and family support. These findings highlight the need for tailored self-management programs for cancer survivors. IMPLICATIONS FOR PRACTICE: This study offers insights for developing tailored diabetes self-management programs and educational interventions for cancer survivors.
RESUMEN
PURPOSE: The aim of this study is to identify the key functional care problems, NANDA-I nursing diagnoses, and intervention plans related to function-focused care (FFC) using a web-based case management system for patients who present different cognitive status. METHODS: This study employed a retrospective descriptive research design. Data were obtained from system records on patients after the research team trained the case management system at a nursing home in Dangjin in South Chungcheong Province, South Korea. A total of 119 inpatient records were analyzed. RESULTS: The key physical, cognitive, and social functional problems, nursing diagnoses in six domains (health promotion, elimination and exchange, activity/rest, perception/cognition, coping/stress tolerance, and safety/protection), and intervention plans were identified. CONCLUSION: The identified FFC case management information of interdisciplinary caregivers will provide evidence for the implementation of effective interventions according to a patient's functional status. Additional studies related to the establishment of a large clinical database of advanced case management systems focusing on interdisciplinary caregivers' functional management are needed to support the prioritization of functional care.
Asunto(s)
Manejo de Caso , Diagnóstico de Enfermería , Humanos , Estudios Retrospectivos , Casas de Salud , Pacientes Internos , InternetRESUMEN
The skin acts as a vital barrier, shielding the body from external threats that can trigger dryness, itching, and inflammation. Pilea mongolica, a traditional Chinese medicinal herb, holds promise for various ailments, yet its anti-inflammatory properties remain understudied. This study aimed to explore the potential anti-inflammatory effects of the methanol extract of P. mongolica (MEPM) and its underlying molecular mechanisms and active compounds in LPS-stimulated human keratinocytes. MEPM treatment, at concentrations without cytotoxicity, significantly decreased NO productions and the iNOS, IL-6, IL-1ß, and TNF-α levels in LPS-induced HaCaT cells. Moreover, MEPM suppressed IRAK4 expression and phosphorylation of JNK, ERK, p38, p65, and c-Jun, suggesting that the anti-inflammatory effects of MEPM result from the inhibition of IRAK4/MAPK/NF-κB/AP-1 signaling pathway. Through LC/MS/MS analysis, 30 compounds and 24 compounds were estimated in negative and positive modes, respectively, including various anti-inflammatory compounds, such as corilagin and geraniin. Through HPLC analysis, geraniin was found to be present in MEPM at a concentration of 18.87 mg/g. Similar to MEPM, geraniin reduced iNOS mRNA expression and inhibited NO synthesis. It also decreased mRNA and protein levels of inflammatory cytokines, including IL-6 and TNF-α, and inhibited IRAK4 expression and the phosphorylation of MAPKs, NF-κB, and AP-1 pathways. Therefore, it can be inferred that the anti-inflammatory effects of MEPM are attributable to geraniin. Thus, MEPM and its active compound geraniin are potential candidates for use in natural functional cosmetics.
RESUMEN
In eukaryotes, phosphorylation of translation initiation factor 2α (eIF2α) by the kinase Gcn2 (general control nonderepressible 2) is a key response to amino acid starvation. Sensing starvation requires that Gcn2 directly contacts its effector protein Gcn1, and both must contact the ribosome. We have proposed that Gcn2 is activated by uncharged tRNA bound to the ribosomal decoding (A) site, in a manner facilitated by ribosome-bound Gcn1. Protein synthesis requires cyclical association of eukaryotic elongation factors (eEFs) with the ribosome. Gcn1 and Gcn2 are large proteins, raising the question of whether translation and monitoring amino acid availability can occur on the same ribosome. Part of the ribosome-binding domain in Gcn1 has homology to one of the ribosome-binding domains in eEF3, suggesting that these proteins utilize overlapping binding sites on the ribosome and consequently cannot function simultaneously on the same ribosome. Supporting this idea, we found that eEF3 overexpression in Saccharomyces cerevisiae diminished growth on amino acid starvation medium (Gcn(-) phenotype) and decreased eIF2α phosphorylation, and that the growth defect associated with constitutively active Gcn2 was diminished by eEF3 overexpression. Overexpression of the eEF3 HEAT domain, or C terminus, was sufficient to confer a Gcn(-) phenotype, and both fragments have ribosome affinity. eEF3 overexpression did not significantly affect Gcn1-ribosome association, but it exacerbated the Gcn(-) phenotype of Gcn1-M7A that has reduced ribosome affinity. Together, this suggests that eEF3 blocks Gcn1 regulatory function on the ribosome. We propose that the Gcn1-Gcn2 complex only functions on ribosomes with A-site-bound uncharged tRNA, because eEF3 does not occupy these stalled complexes.
Asunto(s)
Factores de Elongación de Péptidos/metabolismo , Proteínas Serina-Treonina Quinasas/metabolismo , Proteínas de Saccharomyces cerevisiae/metabolismo , Saccharomyces cerevisiae/metabolismo , Sitios de Unión/genética , Activación Enzimática , Factor 2 Eucariótico de Iniciación/metabolismo , Regulación Fúngica de la Expresión Génica , Immunoblotting , Mutación , Factores de Elongación de Péptidos/genética , Fenotipo , Fosforilación , Biosíntesis de Proteínas , Proteínas Serina-Treonina Quinasas/genética , Ribosomas/genética , Ribosomas/metabolismo , Saccharomyces cerevisiae/genética , Saccharomyces cerevisiae/crecimiento & desarrollo , Proteínas de Saccharomyces cerevisiae/genética , Especificidad por SustratoRESUMEN
Background and Purpose: The COVID-19 pandemic can cause psychological distress, and hemodialysis patients with chronic kidney disease may be particularly vulnerable. The aim of this study is to investigate anxiety levels among patients undergoing hemodialysis during the COVID-19 pandemic and to explore the relationship between health literacy and anxiety. Methods: This study recruited 149 hemodialysis patients from two hospitals between July 16th and July 31st, 2021. Patient data were collected using questionnaires on general characteristics, health literacy, generalized anxiety, and coronavirus disease-related anxiety. We used the Coronavirus Anxiety Scale (CAS) and the Korean version of the Generalized Anxiety Disorder (GAD) scale to evaluate the anxiety symptoms of the patients. Statistical analyses were performed using descriptive statistics, t-test, Mann-Whitney U-test, one-way ANOVA, Kruskal-Walli's test and Spearman's rank correlation. Results: The results showed that health literacy increased with decreasing age and increasing educational level among patients who source health information from the internet and among patients without comorbidities. Patients with comorbidities showed high levels of general anxiety. Patients who search for health information for ≥1 hour had high levels of coronavirus disease-related anxiety. Both CAS and GAD showed a significant negative correlation with the sub-domains of health literacy, except for critical health literacy. Conclusion: The results of this study highlight the need for a follow-up study on whether health literacy programs will reduce the anxiety levels of patients undergoing hemodialysis during infectious disease outbreaks. In addition, provision of social support for patients with comorbidity is essential for reducing their anxiety levels during disease outbreaks.
RESUMEN
In recent years, nanoscience and nanotechnology have emerged as promising fields in materials science. Spectroscopic techniques like scanning tunneling microscopy and atomic force microscopy have revolutionized the characterization, manipulation, and size control of nanomaterials, enabling the creation of diverse materials such as fullerenes, graphene, nanotubes, nanofibers, nanorods, nanowires, nanoparticles, nanocones, and nanosheets. Among these nanomaterials, there has been considerable interest in flower-shaped hierarchical 3D nanostructures, known as nanoflowers. These structures offer advantages like a higher surface-to-volume ratio compared to spherical nanoparticles, cost-effectiveness, and environmentally friendly preparation methods. Researchers have explored various applications of 3D nanostructures with unique morphologies derived from different nanoflowers. The nanoflowers are classified as organic, inorganic and hybrid, and the hybrids are a combination thereof, and most research studies of the nanoflowers have been focused on biomedical applications. Intriguingly, among them, inorganic nanoflowers have been studied extensively in various areas, such as electro, photo, and chemical catalysis, sensors, supercapacitors, and batteries, owing to their high catalytic efficiency and optical characteristics, which arise from their composition, crystal structure, and local surface plasmon resonance (LSPR). Despite the significant interest in inorganic nanoflowers, comprehensive reviews on this topic have been scarce until now. This is the first review focusing on inorganic nanoflowers for applications in electro, photo, and chemical catalysts, sensors, supercapacitors, and batteries. Since the early 2000s, more than 350 papers have been published on this topic with many ongoing research projects. This review categorizes the reported inorganic nanoflowers into four groups based on their composition and structure: metal, metal oxide, alloy, and other nanoflowers, including silica, metal-metal oxide, core-shell, doped, coated, nitride, sulfide, phosphide, selenide, and telluride nanoflowers. The review thoroughly discusses the preparation methods, conditions for morphology and size control, mechanisms, characteristics, and potential applications of these nanoflowers, aiming to facilitate future research and promote highly effective and synergistic applications in various fields.
RESUMEN
This study aimed to identify differences in health behaviors according to the employment status and occupation of cancer survivors, as well as to identify risk factors. Using data from the Korea National and Health Nutrition Examination Survey (2008-2018), 1023 cancer survivors aged 19-60 years were classified based on their employment status and occupation, and their health behaviors were comparatively assessed. To investigate the impact of occupational status on the health behaviors of cancer survivors, we performed multivariate adjusted logistic regression analysis. Five hundred fifty-six (54.3%) cancer survivors were engaged in economic activities. After adjusting for various factors, white- and blue-collar workers exhibited an increased risk of obesity. The blue-collar group had a 1.45 times higher risk of non-practice with cancer screening, while the white-collar group had a 0.50 times lower risk of non-practice with health screening. The results provide evidence of the need to support cancer survivors in practicing healthy behaviors according to their employment status and occupation. As cancer survivors' economic activities increase, it is necessary to help them manage their health by predicting any possible health-behavior failures.