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1.
Gut ; 73(3): 533-540, 2024 Feb 23.
Artículo en Inglés | MEDLINE | ID: mdl-37907259

RESUMEN

OBJECTIVE: We explored clinical implications of the new definition of metabolic dysfunction-associated steatotic liver disease (MASLD) by assessing its prevalence and associated cardiovascular disease (CVD) risk. DESIGN: From nationwide health screening data, we identified 9 775 066 adults aged 20-79 who underwent health examination in 2009. Participants were categorised into four mutually exclusive groups: (1) MASLD; (2) MASLD with increased alcohol intake (MetALD); (3) MASLD with other combined aetiology (the three collectively referred to as MASLD/related steatotic liver disease (SLD)); and (4) no MASLD/related SLD. SLD was determined by fatty liver index ≥30. The primary outcome was CVD event, defined as a composite of myocardial infarction, ischaemic stroke, heart failure or cardiovascular death. RESULTS: The prevalence of MASLD, MetALD and MASLD with other combined aetiology was 27.5%, 4.4% and 1.5%, respectively. A total of 8 808 494 participants without prior CVD were followed up for a median of 12.3 years, during which 272 863 CVD events occurred. The cumulative incidence and multivariable-adjusted risk of CVD were higher in participants with MASLD/related SLD than in those without (HR 1.38 (95% CI 1.37 to 1.39)). Multivariable-adjusted HR (95% CI) of CVD events was 1.39 (1.38 to 1.40) for MASLD, 1.28 (1.26 to 1.30) for MetALD and 1.30 (1.26 to 1.34) for MASLD with other combined aetiology compared to the absence of any of these conditions. CVD risk was also higher in participants with metabolic dysfunction-associated fatty liver disease or non-alcoholic fatty liver disease than in those without the respective condition. CONCLUSION: Over one-third of Korean adults have MASLD/related SLD and bear a high CVD risk.


Asunto(s)
Isquemia Encefálica , Enfermedades Cardiovasculares , Enfermedades Metabólicas , Enfermedad del Hígado Graso no Alcohólico , Accidente Cerebrovascular , Adulto , Humanos , Enfermedades Cardiovasculares/epidemiología , Enfermedades Cardiovasculares/etiología , Enfermedades Metabólicas/complicaciones , Enfermedades Metabólicas/epidemiología , Enfermedad del Hígado Graso no Alcohólico/complicaciones , Enfermedad del Hígado Graso no Alcohólico/epidemiología
2.
J Hepatol ; 80(1): 20-30, 2024 01.
Artículo en Inglés | MEDLINE | ID: mdl-37734683

RESUMEN

BACKGROUND & AIMS: Recent studies reported that moderate HBV DNA levels are significantly associated with hepatocellular carcinoma (HCC) risk in hepatitis B e antigen (HBeAg)-positive, non-cirrhotic patients with chronic hepatitis B (CHB). We aimed to develop and validate a new risk score to predict HCC development using baseline moderate HBV DNA levels in patients entering into HBeAg-positive CHB from chronic infection. METHODS: This multicenter cohort study recruited 3,585 HBeAg-positive, non-cirrhotic patients who started antiviral treatment with entecavir or tenofovir disoproxil fumarate at phase change into CHB from chronic infection in 23 tertiary university-affiliated hospitals of South Korea (2012-2020). A new HCC risk score (PAGED-B) was developed (training cohort, n = 2,367) based on multivariable Cox models. Internal validation using bootstrap sampling and external validation (validation cohort, n = 1,218) were performed. RESULTS: Sixty (1.7%) patients developed HCC (median follow-up, 5.4 years). In the training cohort, age, gender, platelets, diabetes and moderate HBV DNA levels (5.00-7.99 log10 IU/ml) were independently associated with HCC development; the PAGED-B score (based on these five predictors) showed a time-dependent AUROC of 0.81 for the prediction of HCC development at 5 years. In the validation cohort, the AUROC of PAGED-B was 0.85, significantly higher than for other risk scores (PAGE-B, mPAGE-B, CAMD, and REAL-B). When stratified by the PAGED-B score, the HCC risk was significantly higher in high-risk patients than in low-risk patients (sub-distribution hazard ratio = 8.43 in the training and 11.59 in the validation cohorts, all p <0.001). CONCLUSIONS: The newly established PAGED-B score may enable risk stratification for HCC at the time of transition into HBeAg-positive CHB. IMPACT AND IMPLICATIONS: In this study, we developed and validated a new risk score to predict hepatocellular carcinoma (HCC) development in patients entering into hepatitis B e antigen (HBeAg)-positive chronic hepatitis B (CHB) from chronic infection. The newly established PAGED-B score, which included baseline moderate HBV DNA levels (5-8 log10 IU/ml), improved on the predictive performance of prior risk scores. Based on a patient's age, gender, diabetic status, platelet count, and moderate DNA levels (5-8 log10 IU/ml) at the phase change into CHB from chronic infection, the PAGED-B score represents a reliable and easily available risk score to predict HCC development during the first 5 years of antiviral treatment in HBeAg-positive patients entering into CHB. With a scoring range from 0 to 12 points, the PAGED-B score significantly differentiated the 5-year HCC risk: low <7 points and high ≥7 points.


Asunto(s)
Carcinoma Hepatocelular , Hepatitis B Crónica , Neoplasias Hepáticas , Humanos , Preescolar , Carcinoma Hepatocelular/etiología , Carcinoma Hepatocelular/inducido químicamente , Hepatitis B Crónica/complicaciones , Hepatitis B Crónica/tratamiento farmacológico , Antígenos e de la Hepatitis B , ADN Viral , Neoplasias Hepáticas/etiología , Neoplasias Hepáticas/inducido químicamente , Estudios de Cohortes , Infección Persistente , Antivirales/uso terapéutico , Factores de Riesgo , Virus de la Hepatitis B/genética
3.
Curr Issues Mol Biol ; 45(12): 10159-10178, 2023 Dec 16.
Artículo en Inglés | MEDLINE | ID: mdl-38132480

RESUMEN

The process of skin aging is currently recognized as a disease, and extracellular vesicles (EVs) are being used to care for it. While various EVs are present in the market, there is a growing need for research on improving skin conditions through microbial and plant-derived EVs. Edelweiss is a medicinal plant and is currently an endangered species. Callus culture is a method used to protect rare medicinal plants, and recently, research on EVs using callus culture has been underway. In this study, the researchers used LED light to increase the productivity of Edelweiss EVs and confirmed that productivity was enhanced by LED exposure. Additionally, improvements in skin anti-aging indicators were observed. Notably, M-LED significantly elevated callus fresh and dry weight, with a DW/FW ratio of 4.11%, indicating enhanced proliferation. Furthermore, M-LED boosted secondary metabolite production, including a 20% increase in total flavonoids and phenolics. The study explores the influence of M-LED on EV production, revealing a 2.6-fold increase in concentration compared to darkness. This effect is consistent across different plant species (Centella asiatica, Panax ginseng), demonstrating the universality of the phenomenon. M-LED-treated EVs exhibit a concentration-dependent inhibition of reactive oxygen species (ROS) production, surpassing dark-cultured EVs. Extracellular melanin content analysis reveals M-LED-cultured EVs' efficacy in reducing melanin production. Additionally, the expression of key skin proteins (FLG, AQP3, COL1) is significantly higher in fibroblasts treated with M-LED-cultured EVs. These results are expected to provide valuable insights into research on improving the productivity of plant-derived EVs and enhancing skin treatment using plant-derived EVs.

4.
Clin Gastroenterol Hepatol ; 21(2): 358-369.e12, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-34998993

RESUMEN

BACKGROUND & AIMS: International guidelines recommend physical activity for subjects with nonalcoholic fatty liver disease (NAFLD). This study investigated the association of physical activity with risk of liver fibrosis, sarcopenia, and cardiovascular disease (CVD) in NAFLD. METHODS: In this multicenter, retrospective study, 11,690 NAFLD subjects who underwent a health screening program and were assessed for physical activity (metabolic equivalent task [MET]-min/week) between 2014 and 2020 were recruited. Liver fibrosis was assessed by using the fibrosis-4 index, NAFLD fibrosis score, and FibroScan-AST score, sarcopenia by using multi-frequency bioelectric impedance analysis, and CVD risk by using atherosclerotic CVD (ASCVD) risk score, and coronary artery calcium (CAC) score were calculated. RESULTS: The prevalence of fibrosis, sarcopenia, high probability of ASCVD, and high CAC score significantly decreased with increasing quartiles of physical activity (all P for trend <.001). In a fully adjusted model, physical activity above 600 MET-min/week (≥third quartile) was independently associated with a reduced risk of fibrosis (adjusted odds ratio [aOR] = 0.59; 95% confidence interval [CI], 0.40-0.86), sarcopenia (aOR = 0.72; 95% CI, 0.58-0.88), high probability of ASCVD (aOR = 0.58; 95% CI, 0.46-0.73), and high CAC score (aOR = 0.32; 95% CI, 0.13-0.83; all P <.05). In addition, increasing amounts of physical activity were significantly associated with risk reduction between fibrosis, sarcopenia, and high probability of ASCVD (all P for trend <.001). In subjects with sarcopenic obesity or lean NAFLD, physical activity was also independently associated with reduced risk of fibrosis and high probability of ASCVD (all P <.05). CONCLUSIONS: Physical activity showed a protective effect against fibrosis, sarcopenia, and CVD in NAFLD.


Asunto(s)
Enfermedades Cardiovasculares , Enfermedad del Hígado Graso no Alcohólico , Sarcopenia , Humanos , Enfermedad del Hígado Graso no Alcohólico/complicaciones , Enfermedad del Hígado Graso no Alcohólico/epidemiología , Enfermedad del Hígado Graso no Alcohólico/diagnóstico , Sarcopenia/epidemiología , Sarcopenia/complicaciones , Enfermedades Cardiovasculares/epidemiología , Enfermedades Cardiovasculares/etiología , Estudios Retrospectivos , Cirrosis Hepática/complicaciones , Cirrosis Hepática/epidemiología , Cirrosis Hepática/diagnóstico , Fibrosis , Ejercicio Físico
5.
Clin Gastroenterol Hepatol ; 21(9): 2298-2307.e18, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-36462755

RESUMEN

BACKGROUND & AIMS: The impact of the severity of sarcopenic obesity (SO) in nonalcoholic fatty liver disease (NAFLD) on the risk of significant liver fibrosis or cardiovascular disease (CVD) remains unclear. We aimed to identify high-risk subjects with SO for significant liver fibrosis or CVD among subjects with SO and NAFLD. METHODS: This multicenter, retrospective study involved 23,889 subjects with NAFLD who underwent a health screening program (2014-2020). Sarcopenia was defined based on gender-specific sarcopenia index cutoff using multi-frequency bioelectric impedance analysis. High-risk subjects with SO were defined as those with significant liver fibrosis by fibrosis-4 index >2.67 or atherosclerotic CVD risk score >20%. Multivariable logistic regression analysis for identifying high-risk subjects with SO was performed in a cross-sectional cohort with SO, and further validation was performed in a longitudinal cohort. RESULTS: SO prevalence was 5.4% (n = 1297 of 23,889). Older age (unstandardized beta [ß] = 3.23; P < .001), male (ß = 1.66; P = .027), sarcopenia index (ß = -6.25; P = .019), and metabolic syndrome (ß = 1.75; P < .001) were significant risk factors for high-risk SO. Based on a high-risk SO screening model, high-risk subjects with SO had significantly higher odds of significant liver fibrosis (training: adjusted odds ratio [aOR], 3.72; validation: aOR, 2.38) or CVD (training: aOR, 5.20; validation: aOR, 3.71) than subjects without SO (all P < .001). In subgroup analyses, the cumulative incidence of significant liver fibrosis or CVD development was significantly higher in high-risk subjects with SO than in low-risk subjects with SO in a longitudinal cohort considering all-cause mortality and liver transplantation as competing risks (sub-distribution hazard ratio, 5.37; P < .001). CONCLUSION: The high-risk screening model may enable the identification of high-risk subjects with SO with NAFLD.


Asunto(s)
Enfermedades Cardiovasculares , Enfermedad del Hígado Graso no Alcohólico , Sarcopenia , Humanos , Masculino , Enfermedad del Hígado Graso no Alcohólico/complicaciones , Enfermedad del Hígado Graso no Alcohólico/epidemiología , Enfermedad del Hígado Graso no Alcohólico/diagnóstico , Sarcopenia/complicaciones , Sarcopenia/epidemiología , Estudios Retrospectivos , Estudios Transversales , Factores de Riesgo , Cirrosis Hepática/complicaciones , Cirrosis Hepática/epidemiología , Cirrosis Hepática/diagnóstico , Obesidad/complicaciones , Obesidad/epidemiología , Enfermedades Cardiovasculares/epidemiología , Medición de Riesgo
6.
Am J Gastroenterol ; 118(11): 1963-1972, 2023 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-36881437

RESUMEN

INTRODUCTION: Tenofovir disoproxil fumarate (TDF) is reportedly superior or at least comparable to entecavir (ETV) for the prevention of hepatocellular carcinoma (HCC) in patients with chronic hepatitis B; however, it has distinct long-term renal and bone toxicities. This study aimed to develop and validate a machine learning model (designated as Prediction of Liver cancer using Artificial intelligence-driven model for Network-antiviral Selection for hepatitis B [PLAN-S]) to predict an individualized risk of HCC during ETV or TDF therapy. METHODS: This multinational study included 13,970 patients with chronic hepatitis B. The derivation (n = 6,790), Korean validation (n = 4,543), and Hong Kong-Taiwan validation cohorts (n = 2,637) were established. Patients were classified as the TDF-superior group when a PLAN-S-predicted HCC risk under ETV treatment is greater than under TDF treatment, and the others were defined as the TDF-nonsuperior group. RESULTS: The PLAN-S model was derived using 8 variables and generated a c-index between 0.67 and 0.78 for each cohort. The TDF-superior group included a higher proportion of male patients and patients with cirrhosis than the TDF-nonsuperior group. In the derivation, Korean validation, and Hong Kong-Taiwan validation cohorts, 65.3%, 63.5%, and 76.4% of patients were classified as the TDF-superior group, respectively. In the TDF-superior group of each cohort, TDF was associated with a significantly lower risk of HCC than ETV (hazard ratio = 0.60-0.73, all P < 0.05). In the TDF-nonsuperior group, however, there was no significant difference between the 2 drugs (hazard ratio = 1.16-1.29, all P > 0.1). DISCUSSION: Considering the individual HCC risk predicted by PLAN-S and the potential TDF-related toxicities, TDF and ETV treatment may be recommended for the TDF-superior and TDF-nonsuperior groups, respectively.


Asunto(s)
Carcinoma Hepatocelular , Hepatitis B Crónica , Neoplasias Hepáticas , Humanos , Masculino , Hepatitis B Crónica/complicaciones , Hepatitis B Crónica/tratamiento farmacológico , Antivirales/uso terapéutico , Carcinoma Hepatocelular/epidemiología , Carcinoma Hepatocelular/prevención & control , Carcinoma Hepatocelular/complicaciones , Inteligencia Artificial , Neoplasias Hepáticas/complicaciones , Resultado del Tratamiento , Tenofovir/uso terapéutico , Aprendizaje Automático , Virus de la Hepatitis B , Estudios Retrospectivos
7.
Mar Drugs ; 21(10)2023 Oct 12.
Artículo en Inglés | MEDLINE | ID: mdl-37888466

RESUMEN

Prolonged thymic involution results in decreased thymopoiesis and thymic output, leading to peripheral T-cell deficiency. Since the thymic-dependent pathway is the only means of generating fully mature T cells, the identification of strategies to enhance thymic regeneration is crucial in developing therapeutic interventions to revert immune suppression in immunocompromised patients. The present study clearly shows that fish collagen peptides (FCPs) stimulate activities of thymic epithelial cells (TECs), including cell proliferation, thymocyte adhesion, and the gene expression of thymopoietic factors such as FGF-7, IGF-1, BMP-4, VEGF-A, IL-7, IL-21, RANKL, LTß, IL-22R, RANK, LTßR, SDF-1, CCL21, CCL25, CXCL5, Dll1, Dll4, Wnt4, CD40, CD80, CD86, ICAM-1, VCAM-1, FoxN1, leptin, cathepsin L, CK5, and CK8 through the NF-κB signal transduction pathway. Furthermore, our study also revealed the cytoprotective effects of FCPs on TECs against cyclophosphamide-induced cellular injury through the NF-κB signaling pathway. Importantly, FCPs exhibited a significant capability to facilitate thymic regeneration in mice after cyclophosphamide-induced damage via the NF-κB pathway. Taken together, this study sheds light on the role of FCPs in TEC function, thymopoiesis, and thymic regeneration, providing greater insight into the development of novel therapeutic strategies for effective thymus repopulation for numerous clinical conditions in which immune reconstitution is required.


Asunto(s)
FN-kappa B , Timocitos , Humanos , Ratones , Animales , FN-kappa B/metabolismo , Citoprotección , Timo , Células Epiteliales , Colágeno/metabolismo , Expresión Génica , Proliferación Celular , Ciclofosfamida/efectos adversos
8.
Int J Mol Sci ; 24(11)2023 May 26.
Artículo en Inglés | MEDLINE | ID: mdl-37298276

RESUMEN

Nonalcoholic fatty liver disease (NAFLD) can lead to liver fibrosis and cirrhosis. Recently, glucagon-like peptide 1 receptor agonists (GLP-1RAs), a class of drugs used to treat type 2 diabetes and obesity, have shown therapeutic effects against NAFLD. In addition to reducing blood glucose levels and body weight, GLP-1RAs are effective in improving the clinical, biochemical, and histological markers of hepatic steatosis, inflammation, and fibrosis in patients with NAFLD. Additionally, GLP-1RAs have a good safety profile with minor side effects, such as nausea and vomiting. Overall, GLP-1RAs show promise as a potential treatment for NAFLD, and further studies are required to determine their long-term safety and efficacy.


Asunto(s)
Diabetes Mellitus Tipo 2 , Enfermedad del Hígado Graso no Alcohólico , Humanos , Péptido 1 Similar al Glucagón/uso terapéutico , Receptor del Péptido 1 Similar al Glucagón/agonistas , Hipoglucemiantes/efectos adversos , Hipoglucemiantes/farmacología , Hipoglucemiantes/uso terapéutico , Cirrosis Hepática/tratamiento farmacológico , Enfermedad del Hígado Graso no Alcohólico/tratamiento farmacológico
9.
J Hepatol ; 76(2): 311-318, 2022 02.
Artículo en Inglés | MEDLINE | ID: mdl-34606915

RESUMEN

BACKGROUND & AIMS: Several models have recently been developed to predict risk of hepatocellular carcinoma (HCC) in patients with chronic hepatitis B (CHB). Our aims were to develop and validate an artificial intelligence-assisted prediction model of HCC risk. METHODS: Using a gradient-boosting machine (GBM) algorithm, a model was developed using 6,051 patients with CHB who received entecavir or tenofovir therapy from 4 hospitals in Korea. Two external validation cohorts were independently established: Korean (5,817 patients from 14 Korean centers) and Caucasian (1,640 from 11 Western centers) PAGE-B cohorts. The primary outcome was HCC development. RESULTS: In the derivation cohort and the 2 validation cohorts, cirrhosis was present in 26.9%-50.2% of patients at baseline. A model using 10 parameters at baseline was derived and showed good predictive performance (c-index 0.79). This model showed significantly better discrimination than previous models (PAGE-B, modified PAGE-B, REACH-B, and CU-HCC) in both the Korean (c-index 0.79 vs. 0.64-0.74; all p <0.001) and Caucasian validation cohorts (c-index 0.81 vs. 0.57-0.79; all p <0.05 except modified PAGE-B, p = 0.42). A calibration plot showed a satisfactory calibration function. When the patients were grouped into 4 risk groups, the minimal-risk group (11.2% of the Korean cohort and 8.8% of the Caucasian cohort) had a less than 0.5% risk of HCC during 8 years of follow-up. CONCLUSIONS: This GBM-based model provides the best predictive power for HCC risk in Korean and Caucasian patients with CHB treated with entecavir or tenofovir. LAY SUMMARY: Risk scores have been developed to predict the risk of hepatocellular carcinoma (HCC) in patients with chronic hepatitis B. We developed and validated a new risk prediction model using machine learning algorithms in 13,508 antiviral-treated patients with chronic hepatitis B. Our new model, based on 10 common baseline characteristics, demonstrated superior performance in risk stratification compared with previous risk scores. This model also identified a group of patients at minimal risk of developing HCC, who could be indicated for less intensive HCC surveillance.


Asunto(s)
Inteligencia Artificial/normas , Carcinoma Hepatocelular/fisiopatología , Hepatitis B Crónica/complicaciones , Adulto , Antivirales/farmacología , Antivirales/uso terapéutico , Inteligencia Artificial/estadística & datos numéricos , Pueblo Asiatico/etnología , Pueblo Asiatico/estadística & datos numéricos , Carcinoma Hepatocelular/etiología , Estudios de Cohortes , Simulación por Computador/normas , Simulación por Computador/estadística & datos numéricos , Femenino , Estudios de Seguimiento , Guanina/análogos & derivados , Guanina/farmacología , Guanina/uso terapéutico , Hepatitis B Crónica/fisiopatología , Humanos , Neoplasias Hepáticas/complicaciones , Neoplasias Hepáticas/fisiopatología , Masculino , Persona de Mediana Edad , República de Corea/etnología , Tenofovir/farmacología , Tenofovir/uso terapéutico , Población Blanca/etnología , Población Blanca/estadística & datos numéricos
10.
Clin Gastroenterol Hepatol ; 20(6): 1343-1353.e16, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-34500103

RESUMEN

BACKGROUND & AIMS: Antiviral treatment from hepatitis B envelope antigen (HBeAg)-positive status may attenuate the integration of hepatitis B virus DNA into the host genome causing hepatocellular carcinoma (HCC). We investigated the impact of HBeAg status at the onset of antiviral treatment on the risk of HCC. METHODS: The incidence of HCC was evaluated in Korean patients with chronic hepatitis B who started entecavir or tenofovir in either HBeAg-positive or HBeAg-negative phase. The results in the Korean cohort were validated in a Caucasian PAGE-B cohort. RESULTS: A total of 9143 Korean patients (mean age, 49.2 years) were included: 49.1% were HBeAg-positive and 49.2% had cirrhosis. During follow-up (median, 5.1 years), 916 patients (10.0%) developed HCC. Baseline HBeAg positivity was not associated with the risk of HCC in the entire cohort or cirrhotic subcohort. However, in the non-cirrhotic subcohort, HBeAg positivity was independently associated with a lower risk of HCC in multivariable (adjusted hazard ratio [aHR], 0.41; 95% confidence interval [CI], 0.26-0.66), propensity score-matching (aHR, 0.46; 95% CI, 0.28-0.76), and inverse probability weighting analyses (aHR, 0.44; 95% CI, 0.28-0.70). In the Caucasian cohort (n = 719; mean age, 51.8 years; HBeAg-positive, 20.3%; cirrhosis, 34.8%), HBeAg-positivity was not associated with the risk of HCC either in the entire cohort or cirrhotic subcohort. In the non-cirrhotic subcohort, none of the HBeAg-positive group developed HCC, although the difference failed to reach statistical significance (aHR, 0.21; 95% CI, 0.00-1.67). CONCLUSIONS: This multinational cohort study implies that HBeAg positivity at the onset of antiviral treatment seems to be an independent factor associated with a lower risk of HCC in patients with chronic hepatitis B without cirrhosis, but not in those with cirrhosis.


Asunto(s)
Carcinoma Hepatocelular , Hepatitis B Crónica , Neoplasias Hepáticas , Antivirales/uso terapéutico , Carcinoma Hepatocelular/etiología , Estudios de Cohortes , Antígenos de la Hepatitis B/uso terapéutico , Antígenos e de la Hepatitis B , Virus de la Hepatitis B/genética , Hepatitis B Crónica/complicaciones , Hepatitis B Crónica/tratamiento farmacológico , Humanos , Cirrosis Hepática/complicaciones , Neoplasias Hepáticas/etiología , Persona de Mediana Edad
11.
Opt Express ; 30(11): 18684-18691, 2022 May 23.
Artículo en Inglés | MEDLINE | ID: mdl-36221664

RESUMEN

We propose the multi-directional viewing-zone extension of computer-generated holograms (CGHs) using a single flat-panel spatial light modulator (SLM) and a multi-directional shuffle interconnection. A design breaking the SLM plane into several sub-zone regions and creating extended viewing-zones through a multi-directional shuffle interconnection is presented with a proof-of-concept experiment generating a cone-like viewing zone subtended by sixteen sub-viewing-zones.

12.
Opt Express ; 30(11): 19839-19854, 2022 May 23.
Artículo en Inglés | MEDLINE | ID: mdl-36221750

RESUMEN

This paper investigates the submicron scale color filter design in the high-definition computer-generated hologram (HD-CGH). It is addressed that single pixel structural coloration is essential for full-color wide-viewing angle HD-CGH because the conventional RGB color stripe filter degrades HD-CGH image quality due to low misalignment tolerance. Considering that a submicron scale slit or hole with metallic mirror sidewalls can operate as a single pixel color filter. We propose a design of single pixel RGB plasmonic color filter (PCF) and present the feasibility of applying the proposed single pixel RGB PCF to high-definition HD-CGHs. Based on the RGB PCF platform, a 1.1 µm × 1.1 µm RGB PCF is designed and the corresponding optical characteristics of the full-color HD-CGH are analyzed.

13.
Opt Lett ; 47(22): 5909-5912, 2022 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-37219134

RESUMEN

Complex spatial light modulation, which can simultaneously control the amplitude and phase of light, is an essential optical technology for holographic display. We propose a twisted nematic liquid crystal (TNLC) mode with an in-cell type embedded geometric phase (GP) plate for full-color complex spatial light modulation. The proposed architecture provides an achromatic full-color complex light modulation capability in the far-field plane. The feasibility and working characteristics of the design are validated through numerical simulation.

14.
Opt Lett ; 47(24): 6421-6424, 2022 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-36538453

RESUMEN

In the depth-map computer-generated hologram (CGH), inter-layer edge artifacts are observed in the discontinuous edges of section-wise depth-map objects. CGH synthesis, utilizing the hybrid smoothing method of silhouette masking and edge-apodization, alleviates unwanted inter-layer edge artifacts. The proposed method achieves improved de-artifact filtering that generates holographic images closer to the ground truth image of the depth-map object unattainable by the conventional CGH synthesis method.

15.
Opt Lett ; 47(2): 257-260, 2022 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-35030581

RESUMEN

We propose a holographic printing technique for generating highly efficient large-deflection-angle freeform holographic optical elements (HOEs). For industrial device applications, the optical efficiency and deflection angle of HOEs are critical. To fabricate a high-frequency volume grating in a hogel, we design an optomechanical hogel recording system with a high angle deflection capability, which contrasts with the conventional printing scheme, the wavefront holographic printing technique featuring a paraxial deflection angle. With the proposed system, a large-deflection-angle HOE is experimentally demonstrated, and short-throw holographic caustic projection patterns are realized.

16.
J Pathol ; 253(1): 55-67, 2021 01.
Artículo en Inglés | MEDLINE | ID: mdl-32918742

RESUMEN

Nonalcoholic fatty liver disease is a chronic condition involving steatosis, steatohepatitis and fibrosis, and its progression remains unclear. Although the tetraspanin transmembrane 4 L six family member 5 (TM4SF5) is involved in hepatic fibrosis and cancer, its role in nonalcoholic steatohepatitis (NASH) progression is unknown. We investigated the contribution of TM4SF5 to liver pathology using transgenic and KO mice, diet- or drug-treated mice, in vitro primary cells, and in human tissue. TM4SF5-overexpressing mice exhibited nonalcoholic steatosis and NASH in an age-dependent manner. Initially, TM4SF5-positive hepatocytes and liver tissue exhibited lipid accumulation, decreased Sirtuin 1 (SIRT1), increased sterol regulatory-element binding proteins (SREBPs) and inactive STAT3 via suppressor of cytokine signaling (SOCS)1/3 upregulation. In older mice, TM4SF5 promoted inflammatory factor induction, SIRT1 expression and STAT3 activity, but did not change SOCS or SREBP levels, leading to active STAT3-mediated ECM production for NASH progression. A TM4SF5-associated increase in chemokines promoted SIRT1 expression and progression to NASH with fibrosis. Suppression of the chemokine CCL20 reduced immune cell infiltration and ECM production. Liver tissue from high-fat diet- or CCl4 -treated mice and human patients exhibited TM4SF5-dependent steatotic or steatohepatitic livers with links between TM4SF5-mediated SIRT1 modulation and SREBP or SOCS/STAT3 signaling axes. TM4SF5-mediated STAT3 activation in fibrotic NASH livers increased collagen I and laminin γ2. Both collagen I α1 and laminin γ2 suppression resulted in reduced SIRT1 and active STAT3, but no change in SREBP1 or SOCS, and abolished CCl4 -mediated mouse liver damage. TM4SF5-mediated signaling pathways that involve SIRT1, SREBPs and SOCS/STAT3 promoted progression to NASH. Therefore, TM4SF5 and its downstream effectors may be promising therapeutic targets to treat nonalcoholic fatty liver disease. © 2020 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.


Asunto(s)
Enfermedad Hepática Inducida por Sustancias y Drogas/enzimología , Matriz Extracelular/enzimología , Metabolismo de los Lípidos , Cirrosis Hepática Experimental/enzimología , Hígado/enzimología , Proteínas de la Membrana/metabolismo , Enfermedad del Hígado Graso no Alcohólico/enzimología , Sirtuina 1/metabolismo , Animales , Tetracloruro de Carbono , Línea Celular Tumoral , Enfermedad Hepática Inducida por Sustancias y Drogas/etiología , Enfermedad Hepática Inducida por Sustancias y Drogas/genética , Enfermedad Hepática Inducida por Sustancias y Drogas/patología , Dieta Alta en Grasa , Progresión de la Enfermedad , Matriz Extracelular/patología , Humanos , Hígado/patología , Cirrosis Hepática Experimental/inducido químicamente , Cirrosis Hepática Experimental/genética , Cirrosis Hepática Experimental/patología , Proteínas de la Membrana/genética , Ratones Endogámicos BALB C , Ratones Endogámicos C57BL , Ratones Noqueados , Enfermedad del Hígado Graso no Alcohólico/inducido químicamente , Enfermedad del Hígado Graso no Alcohólico/genética , Enfermedad del Hígado Graso no Alcohólico/patología , Transducción de Señal
17.
Int J Mol Sci ; 23(7)2022 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-35409294

RESUMEN

Di-(2-ethylhexyl) phthalate (DEHP) is a frequently used plasticizer that may be linked to the development of endometriosis, a common gynecological disorder with a profound impact on quality of life. Despite its prevalence, vital access to treatment has often been hampered by a lack of understanding of its pathogenesis as well as reliable disease models. Recently, epithelial-mesenchymal transition (EMT) has been suggested to have a significant role in endometriosis pathophysiology. In this study, we found that DEHP treatment enhanced proliferation, migration, and inflammatory responses, along with EMT and stemness induction in human endometrial and endometriotic cells. The selective transforming growth factor-ß (TGF-ß) receptor type 1/2 inhibitor LY2109761 reversed the DEHP-induced cell proliferation and migration enhancement as well as the increased expression of crucial molecules involved in inflammation, EMT, and stemness, indicating that DEHP-triggered phenomena occur via the TGF-ß/Smad signaling pathway. Our study clearly defines the role of DEHP in the etiology and pathophysiological mechanisms of endometriosis and establishes an efficient disease model for endometriosis using a biomimetic 3D cell culture technique. Altogether, our data provide novel etiological and mechanistic insights into the role of DEHP in endometriosis pathogenesis, opening avenues for developing novel preventive and therapeutic strategies for endometriosis.


Asunto(s)
Dietilhexil Ftalato , Endometriosis , Proliferación Celular , Dietilhexil Ftalato/metabolismo , Dietilhexil Ftalato/toxicidad , Endometriosis/patología , Células Epiteliales/metabolismo , Transición Epitelial-Mesenquimal , Femenino , Humanos , Ácidos Ftálicos , Calidad de Vida , Transducción de Señal , Factor de Crecimiento Transformador beta/metabolismo , Factor de Crecimiento Transformador beta1/metabolismo , Factores de Crecimiento Transformadores/metabolismo
18.
Opt Express ; 29(17): 26793-26807, 2021 Aug 16.
Artículo en Inglés | MEDLINE | ID: mdl-34615107

RESUMEN

An efficient synthesis algorithm for wide-viewing full-color depthmap computer-generated holograms is proposed. We develop a precise computational algorithm integrating wave-optic geometry-mapping, color-matching, and noise-filtering to multiplex multiview elementary computer-generated holograms (CGHs) into a single high-definition CGH without three-dimensional perspective distortion or color dispersion. Computational parallelism is exploited to achieve significant computational efficiency improvement in the production throughput of full-color wide-viewing angle CGHs. The proposed algorithm is verified through the full-color binary hologram reconstruction experiments utilizing an off-axis R·G·B simultaneous illumination method, which suggests the feasibility of the full-color sub-wavelength binary spatial light modulator technology.

19.
Diabetes Metab Res Rev ; 37(8): e3466, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-33957706

RESUMEN

AIM: Patients with type 2 diabetes (T2DM) who require injectable therapy have been conventionally treated with insulin. A glucagon-like peptide 1 receptor agonist was recently recommended as first-line injectable treatment, but few studies have investigated the effects of switching from insulin to dulaglutide. This study investigated the clinical efficacy and parameters affecting responses to dulaglutide as an alternative to insulin in patients with T2DM in a real-world clinical setting. METHODS: Ninety-eight patients with T2DM who were switched from insulin to dulaglutide therapy were retrospectively evaluated. Changes in HbA1c concentrations were assessed after 6 months of consistent treatment with dulaglutide. Multiple linear regression analysis was performed to evaluate parameters affecting the response to dulaglutide treatment. RESULTS: After treatment with dulaglutide for 6 months, patients experienced changes in HbA1c of -0.95% (95% confidence interval [CI]: -1.30% to -0.59%, P < 0.001) and in body weight of -1.75 kg (95% CI: -2.42 to -1.08 kg, P < 0.001). Multiple linear regression analysis showed that higher baseline HbA1c was significantly associated with a greater reduction in HbA1c. The most frequent adverse events were gastrointestinal symptoms. CONCLUSION: Switching from insulin to dulaglutide can lead to significant improvement in HbA1c levels and body weight ​reduction in T2DM patients over 6 months. Higher baseline HbA1c is associated with a better clinical response to dulaglutide.


Asunto(s)
Diabetes Mellitus Tipo 2 , Glucemia/análisis , Diabetes Mellitus Tipo 2/complicaciones , Péptidos Similares al Glucagón/efectos adversos , Péptidos Similares al Glucagón/análogos & derivados , Hemoglobina Glucada/análisis , Humanos , Hipoglucemiantes/efectos adversos , Fragmentos Fc de Inmunoglobulinas/efectos adversos , Insulina/efectos adversos , Proteínas Recombinantes de Fusión/efectos adversos , Estudios Retrospectivos
20.
Dig Dis Sci ; 66(7): 2427-2438, 2021 07.
Artículo en Inglés | MEDLINE | ID: mdl-32856240

RESUMEN

BACKGROUND AND AIMS: The influence of direct-acting antivirals (DAAs) on chronic hepatitis C (CHC)-related hepatocellular carcinoma (HCC) remains controversial. We investigated the effect of eradicating CHC using DAAs on treatment outcomes in patients with CHC-related HCC treated with transarterial chemoembolization (TACE). METHODS: This nationwide, multi-center, retrospective study recruited patients with CHC-related HCC treated with TACE as the first-line anti-cancer treatment, and who achieved a sustained virological response (SVR) using DAAs (DAA group) between 2006 and 2017. Patients achieving an SVR following interferon-based treatment (IFN group) and those without treatment (control group) were also recruited for comparison. RESULTS: A total of 425 patients were eligible for the study. Of these, 356 (83.8%), 26 (6.1%), and 43 (10.1%) were allocated to the control, IFN, and DAA groups, respectively. A multivariate analysis showed that liver cirrhosis, segmental portal vein thrombosis, and larger maximal tumor size independently predicted an increased risk of progression (all p < 0.05), whereas, the DAA group (vs. IFN and control groups) independently predicted a reduced risk of progression (hazard ratio (HR) = 0.630, 95% confidence interval 0.411-0.966, p = 0.034). The cumulative incidence rate of HCC progression in the DAA group was significantly lower than that in the IFN and control groups (p = 0.033, log-rank test). In addition, the DAA group (vs. IFN and control groups) was independently associated with a reduced risk of mortality (p = 0.042). CONCLUSIONS: DAA treatment provided significantly prolonged progression-free survival in patients with CHC-related HCC treated with TACE compared to that in patients administered IFN or no treatment.


Asunto(s)
Antivirales/uso terapéutico , Carcinoma Hepatocelular/terapia , Quimioembolización Terapéutica/métodos , Hepatitis C/complicaciones , Hepatitis C/tratamiento farmacológico , Neoplasias Hepáticas/terapia , Anciano , Estudios de Cohortes , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos
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