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1.
Nutrients ; 16(7)2024 Mar 22.
Artigo em Inglês | MEDLINE | ID: mdl-38612954

RESUMO

BACKGROUND: Previous studies have suggested that platelets are associated with inflammation and steatosis and may play an important role in liver health. Therefore, we evaluated whether antiplatelet agents can improve metabolic disorder-related fatty liver disease (MASLD). METHODS: The mice used in the study were fed a high-fat-diet (HFD) and were stratified through liver biopsy at 18 weeks. A total of 22 mice with NAFLD activity scores (NAS) ≥ 4 were randomly divided into three groups (HFD-only, clopidogrel (CLO; 35 mg/kg/day), ticagrelor (TIC; 40 mg/kg/day) group). And then, they were fed a feed mixed with the respective drug for 15 weeks. Blood and tissue samples were collected and used in the study. RESULTS: The TIC group showed a significantly lower degree of NAS and steatosis than the HFD group (p = 0.0047), but no effect on the CLO group was observed. Hepatic lipogenesis markers' (SREBP1c, FAS, SCD1, and DGAT2) expression and endoplasmic reticulum (ER) stress markers (CHOP, Xbp1, and GRP78) only reduced significantly in the TIC treatment group. Inflammation genes (MCP1 and TNF-α) also decreased significantly in the TIC group, but not in the CLO group. Nile red staining intensity and hepatic lipogenesis markers were reduced significantly in HepG2 cells following TIC treatment. CONCLUSION: Ticagrelor attenuated NAS and hepatic steatosis in a MASLD mice model by attenuating lipogenesis and inflammation, but not in the CLO group.


Assuntos
Doenças Metabólicas , Hepatopatia Gordurosa não Alcoólica , Animais , Camundongos , Clopidogrel/farmacologia , Clopidogrel/uso terapêutico , Ticagrelor/farmacologia , Hepatopatia Gordurosa não Alcoólica/tratamento farmacológico , Inflamação
2.
Dig Dis Sci ; 2024 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-38551744

RESUMO

BACKGROUND AND AIM: he mixed lineage kinase domain like pseudokinase (MLKL) is known to play a protective role in non-alcoholic fatty liver disease (NAFLD) via inhibition of necroptosis pathway. However, the role of MLKL in alcoholic liver disease (ALD) is not yet clear. METHOD: C57BL/6N wild-type (WT) and MLKL-knockout (KO) mice (8-10 weeks old) were randomly divided into eight groups. To establish ALD model of different durations, ethanol (EtOH) was fed to WT and MLKL KO for 10 days, 4 weeks, and 8 weeks. The control group was fed with Lieber-DeCarli control diet for 8 weeks. Mortality, degree of hepatic inflammation, and steatosis were compared among the groups. Bulk mRNA transcriptome analysis was performed. Abundance of transcript and gene expressions were calculated based on read count or Transcript by Million (TPM) value. RESULTS: Survival rate of MLKL KO mice compared to WT was similar until 4 weeks, but the survival of MLKL KO mice significantly decreased after 8 weeks in ALD model. There was no difference in degree of inflammation, steatosis, and NAS scores between EtOH-fed MLKL KO and EtOH-fed WT mice at 10 days. However, at 4 weeks and 8 weeks, the degree of hepatic steatosis, NAS, and inflammation were increased in MLKL KO mice. RNA transcriptome data showed that fatty acid synthesis, and lipogenesis, mitochondria, and apoptosis-related pathways were upregulated in EtOH-fed MLKL KO mice compared to EtOH-fed WT mice. Although hepatocyte apoptosis (BAX/BCL2 ratio, caspase-3, and TUNEL staining) increased after EtOH intake; however, apoptosis was more significantly increased in EtOH-fed MLKL KO mice compared to the WT group. At the same time, hepatic cFLIP was decreased in EtOH-fed MLKL KO mice compared to the WT group. CONCLUSION: MLKL deletion did not prevent chronic alcohol-induced liver damage independently of necroptosis and exacerbated hepatic steatosis by increasing hepatocyte apoptosis.

4.
ACS Appl Mater Interfaces ; 16(6): 7353-7363, 2024 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-38315818

RESUMO

This study entailed the synthesis of Ru nanocatalyst decorated on Nb-grafted SBA-15. A Nb-grafted SBA-15 support with varying Nb contents was utilized as a support for the Ru nanoparticles. The effect of Nb grafting on the immobilized Ru nanoparticle catalyst was systematically investigated, and its catalytic performance in the synthesis of furandicarboxylic acid using 5-hydroxymethylfurfural under base-free reaction conditions was evaluated. The results indicate the increased productivity of the Ru@Nb-grafted SBA-15 catalyst with a yield exceeding 95%, representing a significant advancement in catalysis. This study also affords insights into the complex relationship between the catalytic activity and selectivity and its unique surface attributes. Moreover, acidic sites were created, and the electron density within the active sites was modulated by monomeric Nb oxide species on the SBA-15. Additionally, the role of high-electron-density Ru atoms in facilitating the efficient adsorption and activation of the reactant, resulting in enhanced catalytic efficacy, was highlighted.

5.
J Clin Neurol ; 20(3): 315-320, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38330419

RESUMO

BACKGROUND AND PURPOSE: The neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) have been identified as useful biomarkers for assessing the inflammatory response and for predicting the prognosis of various diseases. This study aimed to determine the clinical significance and effects on prognostic prediction of NLR and PLR in acute unilateral vestibulopathy (AUV). METHODS: We retrospectively recruited 128 patients who were diagnosed with AUV from July 2016 to April 2021, and compared NLR and PLR values between these patients with AUV and age- and sex-matched healthy subjects. We also analyzed the correlations of various clinical parameters with NLR and PLR. RESULTS: NLR and PLR in the AUV group were 3.41±2.80 (mean±standard deviation) and 128.86±67.06, respectively, with only NLR being significantly higher than that in the control group (1.55±0.60, p<0.001). The gain asymmetry of the horizontal vestibulo-ocular reflex (VOR) was slightly larger in patients with high NLR (n=52) than in those with normal NLR (n=76) (41.9%±20.2% vs. 33.6%±17.4%, p=0.048). However, the hospitalization period, preceding infection, canal paresis, and absolute horizontal VOR gain did not differ between patients with high and normal NLR and PLR values. The correlation analyses also revealed that none of the clinical parameters were significantly correlated with NLR or PLR. At 3-month follow-up examinations, NLR and PLR did not differ significantly between patients with and without function recovery of the horizontal VOR. CONCLUSIONS: This study found a high NLR in AUV, suggesting an acute inflammatory status in the vestibular organ. However, the usefulness of NLR and PLR as prognostic markers remains unclear.

6.
Inorg Chem ; 62(32): 12913-12919, 2023 Aug 14.
Artigo em Inglês | MEDLINE | ID: mdl-37530612

RESUMO

This study focuses on the synthesis and investigation of ZnIn2S4 nanoparticle (NP) photocatalysts treated with different sulfur sources, thioacetamide (TAA), or thiourea (TU), to explore their wavelength-dependent photocatalytic activity. The research aims to understand the impact of Zn vacancies present on the surface of ZnIn2S4 NPs. The investigation involves electron spin resonance and in situ X-ray photoelectron spectroscopy to study the photocatalytic activity of ZnIn2S4-TU and ZnIn2S4-TAA NPs, following the characterization of surface morphology and electronic properties using high-resolution transmission electron microscopy and X-ray diffraction. Additionally, the study delves into the wavelength-dependent photocatalytic degradation (PCD) activity of the ZnIn2S4 NPs using 2,5-hydroxymethylfurfural (HMF) across a wide range. Notably, the selective oxidation of HMF using ZnIn2S4-TU NPs resulted in the formation of 2,5-furandicarboxylic acid (FDCA) via 2,5-diformylfuran, with an efficiency exceeding 40% over the broad wavelength range. The research demonstrates that the irradiation wavelength for PCD is influenced by the number of defect structures introduced into the ZnIn2S4 NPs through the sulfur source.

7.
Biol Direct ; 18(1): 50, 2023 08 25.
Artigo em Inglês | MEDLINE | ID: mdl-37626369

RESUMO

The response rate to obeticholic acid (OCA), a potential therapeutic agent for non-alcoholic fatty liver disease, is limited. This study demonstrated that upregulation of the alternative bile acid synthesis pathway increases the OCA treatment response rate. The hepatic transcriptome and bile acid metabolite profile analyses revealed that the alternative bile acid synthesis pathway (Cyp7b1 and muricholic acid) in the OCA-responder group were upregulated compared with those in the OCA-non-responder group. Intestinal microbiome analysis also revealed that the abundances of Bacteroidaceae, Parabacteroides, and Bacteroides, which were positively correlated with the alternative bile acid synthesis pathway, were higher in the OCA-responder group than in the non-responder group. Pre-study hepatic mRNA levels of Cyp8b1 (classic pathway) were downregulated in the OCA-responder group. The OCA response rate increased up to 80% in cases with a hepatic Cyp7b1/Cyp8b1 ratio ≥ 5.0. Therefore, the OCA therapeutic response can be evaluated based on the Cyp7b1/Cyp8b1 ratio or the alternative/classic bile acid synthesis pathway activity.


Assuntos
Hepatopatia Gordurosa não Alcoólica , Humanos , Hepatopatia Gordurosa não Alcoólica/tratamento farmacológico , Esteroide 12-alfa-Hidroxilase , Ácidos e Sais Biliares , Biomarcadores
8.
Front Neurol ; 14: 1223996, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37475735

RESUMO

Objectives: This study aimed to determine the pathophysiology of recurrent benign paroxysmal positional vertigo (BPPV) in young patients using gene expression profiling combined with bioinformatics analysis. Methods: Total RNA was extracted from the whole blood of four young patients with recurrent BPPV and four controls. The differentially expressed genes (DEGs) between the groups were screened using a microarray analysis based on the cutoff criteria of |log2 fold change| > 1 and an adjusted p-value of < 0.05. Functional enrichment analysis of DEGs was performed using Gene Ontology analysis, and the protein-protein interaction (PPI) network was constructed using the Search Tool for the Retrieval of the Interacting Genes database. Results: A total of 39 DEGs were detected between the BPPV and control samples, comprising 33 upregulated DEGs and six downregulated DEGs in the BPPV group. Functional enrichment analysis indicated that the upregulated DEGs were significantly enriched in terms related to metabolic processes and the immune system. Two main pathways were extracted from the PPI network: one was associated with oxidative phosphorylation and stress and the other with the adaptive immune system and extracellular matrix degradation. Conclusion: The findings of our bioinformatics analysis indicated that oxidative stress or extracellular matrix degradation due to immune-mediated inflammatory responses may contribute to the development of recurrent BPPV in young patients.

9.
Am Surg ; 89(12): 5865-5873, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37225234

RESUMO

OBJECTIVES: This research aimed to examine the clinicopathological results of colorectal resection in patients with advanced gynecological cancers. METHODS: We retrospectively reviewed the medical records of 104 patients with gynecological cancer who underwent colorectal resection from December 2008 to August 2020 at a single hospital (PNUYH). Using descriptive statistics, variables for risk factors and surgical complications were compared. We eliminated instances with malignancies originating from organs other than the female genitalia, benign gynecological illnesses, primary stoma formation, and any other bowel procedures outside colon resection. RESULTS: The average age of 104 patients was determined to be 62.0 years. The most prevalent gynecological cancer was ovarian cancer (85 patients, 81.7%), and the most frequent procedure was low anterior resection (80 patients, 76.9%). There were postoperative problems in 61 patients (58.7%), while there was anastomotic leaking in just 3 patients (2.9%). Among the risk factors, only preoperative albumin was statistically significant (p=0.019). CONCLUSION: Our findings imply that colorectal resection can be performed safely and effectively on individuals with advanced gynecological cancer.


Assuntos
Fístula Anastomótica , Neoplasias Retais , Humanos , Feminino , Idoso de 80 Anos ou mais , Fístula Anastomótica/epidemiologia , Fístula Anastomótica/etiologia , Estudos Retrospectivos , Neoplasias Retais/cirurgia , Anastomose Cirúrgica/efeitos adversos , Fatores de Risco , Progressão da Doença
10.
Inorg Chem ; 62(8): 3703-3711, 2023 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-36795758

RESUMO

Photocatalysts are useful for various applications, including the conservation and storage of energy, wastewater treatment, air purification, semiconductors, and production of high-value-added products. Herein, ZnxCd1-xS nanoparticle (NP) photocatalysts with different concentrations of Zn2+ ions (x = 0.0, 0.3, 0.5, or 0.7) were successfully synthesized. The photocatalytic activities of ZnxCd1-xS NPs varied with the irradiation wavelength. X-ray diffraction, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, and ultraviolet-visible spectroscopy were used to characterize the surface morphology and electronic properties of the ZnxCd1-xS NPs. In addition, in situ X-ray photoelectron spectroscopy was performed to investigate the effect of the concentration of Zn2+ ions on the irradiation wavelength for photocatalytic activity. Furthermore, wavelength-dependent photocatalytic degradation (PCD) activity of the ZnxCd1-xS NPs was investigated using biomass-derived 2,5-hydroxymethylfurfural (HMF). We observed that the selective oxidation of HMF using ZnxCd1-xS NPs resulted in the formation of 2,5-furandicarboxylic acid via 5-hydroxymethyl-2-furancarboxylic acid or 2,5-diformylfuran. The selective oxidation of HMF was dependent on the irradiation wavelength for PCD. Moreover, the irradiation wavelength for the PCD depended on the concentration of Zn2+ ions in the ZnxCd1-xS NPs.

11.
Front Neurol ; 13: 999419, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36438947

RESUMO

Objectives: This study aimed to describe the clinical and radiological characteristics of a cerebello-brainstem dominant form of X-linked adrenoleukodystrophy (X-ALD). Methods: Three affected members from a family with cerebellar ataxia received full neurological, laboratory and radiological examinations. Genetic diagnoses were confirmed using whole-exome sequencing and protein structural modeling. Results: All affected members presented with slurred speech, ataxia, and spasticity, but showed obvious differences in phenotypic severity and radiological findings. The levels of very long-chain fatty acids (VLCFA) were elevated in each member, while only one had adrenal dysfunction. Genetic analysis identified a hemizygous missense mutation (c.887A>G, p.Tyr296Cys) of the ATP-binding cassette subfamily D member 1 gene (ABCD1) in all affected members, which is likely to destabilize the overall structure of the ABCD1 protein. Conclusions: We report a cerebello-dominant form of X-ALD caused by a missense variant in ABCD1. This report highlights intrafamilial phenotypic variability in X-ALD.

12.
Front Endocrinol (Lausanne) ; 13: 967848, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36353244

RESUMO

Background and aim: Non-alcoholic fatty liver disease (NAFLD) is associated with mitochondrial dysfunction. This study aims to develop biomarkers for assessing mitochondrial dysfunction in patients with NAFLD. Methods: Mitochondrion-associated transcriptome analysis was performed. Peripheral blood mononuclear cells obtained from patients with NAFLD (69) and healthy controls (19) were used to determine the mitochondrial DNA (mtDNA) copy number. A mitochondrial inhibition substrate test (ATP assay) was performed in HepG2 cells using the patient serum. Results: Hepatic mRNA transcriptome analysis showed that the gene expression related to mitochondrial functions (mitochondrial fusion, apoptotic signal, and mitochondrial envelope) increased in patients with steatohepatitis, but not in those with NAFL. Gene set enrichment analysis revealed that the upregulated expression of genes is related to the pathways of the tricarboxylic (TCA) cycle and deoxyribonucleic acid (DNA) replication in patients with steatohepatitis, but not in healthy controls. The mtDNA copy number in the peripheral blood mononuclear cells was 1.28-fold lower in patients with NAFLD than that in healthy controls (P <.0001). The mitochondrial inhibition substrate test showed that the cellular adenosine triphosphate (ATP) concentration was 1.2-fold times less in NAFLD patients than that in healthy controls (P <.0001). The mtDNA copy number and mitochondrial ATP inhibition substrate test demonstrated negative correlations with the degree of hepatic steatosis, whereas the ATP concentration showed a positive correlation with the mtDNA copy number. Conclusion: The mitochondrial copy number of peripheral blood mononuclear cells and mitochondrial ATP inhibition substrate can be used as biomarkers for assessing the mitochondrial dysfunction in patients with NAFLD.


Assuntos
Hepatopatia Gordurosa não Alcoólica , Humanos , Hepatopatia Gordurosa não Alcoólica/genética , Hepatopatia Gordurosa não Alcoólica/metabolismo , Trifosfato de Adenosina/metabolismo , Variações do Número de Cópias de DNA , Leucócitos Mononucleares/metabolismo , Mitocôndrias/genética , Mitocôndrias/metabolismo , DNA Mitocondrial/genética , DNA Mitocondrial/metabolismo , Biomarcadores/metabolismo
13.
J Anus Rectum Colon ; 6(4): 203-212, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36348951

RESUMO

Treatment for early colon cancer has progressed rapidly, with endoscopic resection and minimally invasive surgery. It is important to select patients without risk of lymph node metastasis before deciding on endoscopic resection for early colon cancer treatment. Pathological risk factors include histologic grade of cancer cell differentiation, lymphovascular invasion, perineural invasion, tumor budding, and deep submucosal invasion. These risk factors for predicting lymph node metastasis are crucial for determining the treatment strategy of endoscopic excision and radical resection for early colon cancer. A multidisciplinary approach is emphasized to establish a treatment strategy for early colon cancer to minimize the risk of complications and obtain excellent oncologic outcomes by selecting an appropriate treatment optimized for the patient's stage and condition. Therefore, we aimed to review the optimal multidisciplinary treatment strategies, including endoscopy and surgery, for early colon cancer.

14.
Am Surg ; : 31348221135786, 2022 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-36270320

RESUMO

BACKGROUND: The early detection of infectious complications of colorectal surgery leads to better patient outcomes. This study aimed to assess the role of C-reactive protein (CRP), white blood cell count (WBC), and serum glucose in the early prediction of infectious complications of laparoscopic colorectal surgery. METHODS: Patients who underwent laparoscopic colorectal surgery were included and stratified into two groups: infectious complication (IC) or no infectious complication (non-IC). Serum levels were measured on postoperative days (PODs) 2 and 4. RESULTS: Analysis of 224 patients (IC group: 27, Non-IC group: 197) revealed higher CRP levels in IC group on POD 2 (P = .001). On POD 4, CRP levels and WBC counts were higher in IC group (P<.001, P = .011, respectively). The area under the curve (AUC) of the receiver operating characteristic (ROC) for CRP on PODs 2 and 4 were .743 and .907, respectively, and for WBC on POD 4 was .687. The cut-offs of CRP on PODs 2 and 4 were 156.2 mg/L and 91.3 mg/L, respectively; the cut-off of WBC was 7,220 cells/mm3. Sensitivity of CRP level ≥91.3 mg/L or WBC count ≥7,220 cells/mm3 was 96.3%; (cf. 88.9% for CRP alone), and specificity of CRP level ≥91.3 mg/L and WBC count ≥7,220 cells/mm3 was 93.4% (cf. 82.2% for CRP alone). DISCUSSION: The CRP level on postoperative day (POD) 2 and the combined CRP and WBC on POD 4 were meaningful in predicting infectious complications after laparoscopic colorectal surgery. However, serum glucose levels had a low predictive value for infectious complications.

15.
Front Neurol ; 13: 938740, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35923832

RESUMO

Objectives: This study aimed to determine the underlying pathogenesis of Meniere's disease (MD) using transcriptome analysis. Methods: Total RNA was extracted from the peripheral blood mononuclear cells of 39 patients with MD and 39 controls. Through microarray analysis for nine patients and controls, the differentially expressed genes (DEGs) of those two groups were screened based on cut-off criteria (|fold changes| > 2.0 and adjusted p-value < 0.05). The functional enrichment analysis of DEGs was performed using Gene Ontology (GO). Results: There were 996 DEGs identified in the MD group: 415 were upregulated and 581 were downregulated. A functional enrichment analysis indicated that the downregulated DEGs were significantly enriched in terms related to immune system processes. Among them, 17 genes were enriched in terms for the major histocompatibility complex (MHC) protein complex, and the relative messenger RNA (mRNA) levels of three markedly downregulated DEGs [fold changes < -5: human leukocyte antigen (HLA)-DMA, HLA-DRB1, and HLA-DPB1] were significantly decreased in another 30 patients with MD compared with normal controls by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). However, there were no correlations between the expression levels of these three genes and clinical data, such as age, onset age, time course, or hearing threshold. Conclusions: Our transcriptome analysis showed that the downregulated DEGs in MD were mainly associated with the immune system pathways including the MHC protein complex in MD. Remarkably, a breakdown in immunological tolerance mediated by MHC class II may contribute to the MD development, which has implications for targeted treatment.

16.
Ann Transl Med ; 10(15): 814, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36034996

RESUMO

Background: Several clinical studies have suggested a strong correlation between cholecystectomy and the incidence of non-alcoholic fatty liver disease (NAFLD) although the exact correlation and causal relationship are unclear. This study aimed to investigate whether cholecystectomy increases the incidence of NAFLD or aggravates pre-existing NAFLD. Methods: Standard diet-fed and high-fat (HF) diet-fed mice were subjected to sham operation and cholecystectomy. In study 1, 20 standard diet-fed C57BL/6N mice were sacrificed at months 1, 2, and 4 post-surgery. Meanwhile, in study 2, 25 HF diet-induced NAFLD C57BL/6N mice were biopsied at months 2 and 3 post-surgery and sacrificed at month 6 post-surgery. The hepatic fatty acid and bile acid metabolic pathways and the hepatic bile composition were evaluated. Results: The bodyweight and biochemical parameters (hepatic enzyme, triglyceride, and cholesterol levels) were not significantly different between the standard diet-fed sham and cholecystectomy groups. The NAFLD activity score and the levels of hepatocyte apoptosis markers (Krt18 expression and DNA fragmentation) and de novo lipid synthesis genes were not significantly different between the standard diet-fed sham and cholecystectomy groups. Cholecystectomy did not exacerbate hepatic steatosis, inflammation, and ballooning in the HF diet-fed mice. Hepatic bile acid composition was not markedly different in the sham and cholecystectomy groups fed on standard or HF diet. Cholecystectomy significantly downregulated Cyp7a1 and Cyp27a1 mRNA levels at months 1 and 4 post-surgery but did not affect the degree of steatosis and triglyceride levels. Analysis of bile acid metabolism revealed that taurine-conjugated bile acids were significantly downregulated in the standard diet-fed and high-fat diet-fed mice, but the histological and biochemical parameters were not markedly different. Conclusions: Cholecystectomy did not increase the incidence of NAFLD in standard diet-fed mice. Additionally, NAFLD incidence was not significantly different between the HF diet-fed sham and cholecystectomy groups. Furthermore, the histological parameters were not markedly different between the sham and cholecystectomy groups fed on standard or HF diet. These findings suggest that cholecystectomy does not induce NAFLD.

17.
J Neurol ; 269(12): 6642-6647, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35904591

RESUMO

Vertical pendular nystagmus (PN) rarely occurs with acute pontine lesions. To hypothesize a pathophysiology for acute vertical PN, we analyzed the clinical characteristics and quantitative eye-movement recordings of one new case with acute vertical PN and an additional 11 patients from the literature. Most patients had extensive pontine lesions causing either the locked-in syndrome or unresponsiveness, but two conscious patients had focal lesions restricted to the paramedian caudal pontine tegmentum. All patients presented a complete or partial horizontal gaze palsy, and about half showed ocular bobbing before or during the appearance of vertical PN. The vertical oscillations were conjugate at a frequency of 1-5 Hz, and the amplitudes were variable, ranging from 0.2° to 40°. The peak velocities were asymmetric in some patients, faster with downward movements. About half of the patients developed palatal tremor several weeks or months after presenting with acute vertical PN. Based on the location of the lesions and results of eye-movement recordings, we suggest two possible mechanisms for acute vertical PN; oscillations originating in the inferior olives due to disruption of the central tegmental tract or low-velocity saccadic oscillations caused by omnipause neuron damage.


Assuntos
Nistagmo Patológico , Transtornos da Motilidade Ocular , Humanos , Movimentos Oculares , Ponte/diagnóstico por imagem , Ponte/patologia , Transtornos da Motilidade Ocular/complicações , Movimento
18.
Sci Rep ; 12(1): 11295, 2022 Jul 04.
Artigo em Inglês | MEDLINE | ID: mdl-35789195

RESUMO

Base treatment and metal doping were evaluated as means of enhancing the photocatalytic activity of ZrO2 nanoparticles (NPs) via the generation of oxygen vacancies (OvS), and the sites responsible for this enhancement were identified and characterized by spectroscopic and microscopic techniques. We confirmed that OvS produced by base treatment engaged in photocatalytic activity for organic pollutant degradation, whereas surface defects introduced by Cr-ion doping engaged in oxidative catalysis of molecules. Moreover, we verified that base-treated ZrO2 NPs outperformed their Cr-ion doped counterparts as photocatalysts using in situ X-ray photoelectron spectroscopy and scanning transmission electron microscopy coupled with electron energy loss spectroscopy (STEM-EELS). Thus, our study provides valuable information on the origin of the enhanced photocatalytic activity of modified ZrO2 NPs and demonstrates the practicality of in situ spectroscopy and STEM-EELS for the evaluation of highly efficient metal oxide photocatalysts.

19.
Clin Mol Hepatol ; 28(4): 827-840, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35730208

RESUMO

BACKGROUND/AIMS: We aim to evaluate the effects of auranofin, a known antioxidant, on hepatic steatosis, inflammation, and fibrosis, contributing to non-alcoholic steatohepatitis (NASH) development in vivo and in vitro. METHODS: Transcriptome analysis of LX-2 cells was that expression patterns of genes changed by auranofin, and their related pathways were estimated. We used the gene set enrichment analysis (GSEA) program to determine the pathway involved in overall genetic change. In vitro, LX-2 and HepG2 cells were treated with transforming growth factor (TGF)-ß1 and palmitic acid (PA), respectively, and the antifibrotic and antiadipogenic effect function of auranofin was evaluated. RESULTS: Transcriptome analysis revealed that auranofin decreased the expression of 15 genes, including thrombospondin 1, endothelin 1 (ET-1), fibronectin 1, and LOX. The molecular functions of these genes are involved in collagen binding. GSEA of the overall gene expression pattern revealed that many genes increased in the reactive oxygen species pathway and decreased in the inflammatory response. Auranofin decreased nuclear factor kappa B (NF-κB) and IκBα in TGF-ß1-induced LX-2 cells, thereby reducing ET-1 and fibrosis. Furthermore, increased pNRF2 in PA-induced HepG2 cells led to increased antioxidant marker expression and decreased lipid accumulation. In the bile duct ligation model mice, auranofin reduced the fibrosis area and increased the survival rate. Auranofin reduced liver fibrosis and lipid accumulation in NASH model mice fed on a Western diet. CONCLUSION: Auranofin inhibits lipogenesis and fibrosis formation and is a proposed candidate for NASH treatment.


Assuntos
Hepatopatia Gordurosa não Alcoólica , Camundongos , Humanos , Animais , Hepatopatia Gordurosa não Alcoólica/complicações , Hepatopatia Gordurosa não Alcoólica/tratamento farmacológico , Hepatopatia Gordurosa não Alcoólica/metabolismo , NF-kappa B/metabolismo , NF-kappa B/farmacologia , Fator 2 Relacionado a NF-E2/genética , Fator 2 Relacionado a NF-E2/metabolismo , Fator 2 Relacionado a NF-E2/farmacologia , Fator de Crescimento Transformador beta1/genética , Fator de Crescimento Transformador beta1/metabolismo , Fator de Crescimento Transformador beta1/farmacologia , Auranofina/farmacologia , Auranofina/uso terapêutico , Auranofina/metabolismo , Inibidor de NF-kappaB alfa/metabolismo , Trombospondina 1/metabolismo , Trombospondina 1/farmacologia , Fibronectinas/metabolismo , Fibronectinas/farmacologia , Ácido Palmítico/toxicidade , Ácido Palmítico/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Endotelina-1/metabolismo , Endotelina-1/farmacologia , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Antioxidantes/metabolismo , Camundongos Endogâmicos C57BL , Transdução de Sinais , Cirrose Hepática/patologia , Fatores de Crescimento Transformadores/metabolismo , Fatores de Crescimento Transformadores/farmacologia , Colágeno/metabolismo , Colágeno/farmacologia , Fígado/patologia
20.
Plant Sci ; 320: 111294, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35643612

RESUMO

Rare Cold Inducible 2s (RCI2s) are hydrophobic proteins in cell membranes that participate in abiotic stress tolerance mechanisms. Additionally, they are used as traceable membrane trafficking markers in endocytosis studies. Plants regulate cell homeostasis through endocytosis by limiting the activity of plasma membrane transporter proteins to adapt to stressful conditions. In this study, we found high temperature (HT) stress-induced membrane trafficking of RCI2D in Camelina sativa L. The gene expression and protein synthesis were increased by HT stress at 37 °C. Moreover, rapid membrane trafficking of CsRCI2D was traced by multiple-phase membrane fractionation using sucrose density gradients and compared with CsRCI2E/F/G from the same protein family subgroup. The distribution of CsRCI2s was shown to be similar to that of the clathrin heavy chain, which is known as a major endocytosis protein. Subcellular localization of CsRCI2D was observed in the plasma membrane and endo-membranes and overlapped with membrane lipids. CsRCI2D co-localized with lipids, and its overexpression increased the intracellular lipid content compared to that of wild-type camelina. Moreover, transgenic camelina lines showed enhanced HT stress tolerance during germination and hypocotyl elongation when compared to the wild type. These results suggest that HT-induced CsRCI2D membrane trafficking enhances HT stress tolerance in camelina.


Assuntos
Brassicaceae , Brassicaceae/genética , Membrana Celular , Plantas Geneticamente Modificadas/genética , Estresse Fisiológico , Temperatura
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