Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 432
Filter
Add more filters

Country/Region as subject
Publication year range
1.
Am J Hematol ; 99(4): 662-678, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38197307

ABSTRACT

Chimeric antigen receptor (CAR) T-cell therapy, an innovative immunotherapeutic against relapsed/refractory B-cell lymphoma, faces challenges due to frequent viral infections. Despite this, a comprehensive review addressing risk assessment, surveillance, and treatment management is notably absent. This review elucidates immune response compromises during viral infections in CAR-T recipients, collates susceptibility risk factors, and deliberates on preventive strategies. In the post-pandemic era, marked by the Omicron variant, new and severe threats to CAR-T therapy emerge, necessitating exploration of preventive and treatment measures for COVID-19. Overall, the review provides recommendations for viral infection prophylaxis and management, enhancing CAR-T product safety and recipient survival.


Subject(s)
Lymphoma, B-Cell , Receptors, Chimeric Antigen , Virus Diseases , Humans , Receptors, Chimeric Antigen/therapeutic use , Immunotherapy, Adoptive/adverse effects , Lymphoma, B-Cell/therapy , Virus Diseases/etiology , Antigens, CD19 , Cell- and Tissue-Based Therapy
2.
J Fluoresc ; 2024 Apr 12.
Article in English | MEDLINE | ID: mdl-38607530

ABSTRACT

Hypochloric acid (HClO) is a reactive oxygen species (ROS) that functions as a bacteriostatic and disinfectant in food production. Excessive levels of ClO-, however, have been linked to various health issues, including cardiovascular diseases (Halliwell and Gutteridge in Oxford University press, USA, 2015), arthritis, and neurodegenerative diseases (Heinzelmann and Bauer in Biol Chem. 391(6):675-693, 2010). Therefore, synthesizing highly selective and sensitive probes for rapidly detecting endogenous ClO- in daily foods is currently a popular research topic (Kalyanaraman et al. in Redox Biol. 15:347-362, 2018; Winterbourn in Nat Chem Biol. 4(5):278-286, 2008; Turrens in J Physiol. 552(2):335-344, 2003). Thus, we have developed two highly selective ratiometric fluorescent probes (Probe1 and Probe2) based on indole-phenothiazine to detect ClO- in common vegetables, fruits and beverages qualitatively and quantitatively. Moreover, Both Probe1 and Probe2 have shown good specificity and stability, with high fluorescence intensity and long duration (Feng et al. in Adv Sci. 5:1800397, 2018; Wei et al. in Angew Chem. 131(14):4595-4599, 2019; Baruah et al. in J Mater Chem B, 2022).

3.
J Cell Mol Med ; 27(1): 52-65, 2023 01.
Article in English | MEDLINE | ID: mdl-36479618

ABSTRACT

Renal fibrosis is a major factor in the progression of chronic kidney diseases. Obstructive nephropathy is a common cause of renal fibrosis, which is also accompanied by inflammation. To explore the effect of human-specific CHRFAM7A expression, an inflammation-related gene, on renal fibrosis during obstructive nephropathy, we studied CHRFAM7A transgenic mice and wild type mice that underwent unilateral ureteral obstruction (UUO) injury. Transgenic overexpression of CHRFAM7A gene inhibited UUO-induced renal fibrosis, which was demonstrated by decreased fibrotic gene expression and collagen deposition. Furthermore, kidneys from transgenic mice had reduced TGF-ß1 and Smad2/3 expression following UUO compared with those from wild type mice with UUO. In addition, the overexpression of CHRFAM7A decreased release of inflammatory cytokines in the kidneys of UUO-injured mice. In vitro, the overexpression of CHRFAM7A inhibited TGF-ß1-induced increase in expression of fibrosis-related genes in human renal tubular epithelial cells (HK-2 cells). Additionally, up-regulated expression of CHRFAM7A in HK-2 cells decreased TGF-ß1-induced epithelial-mesenchymal transition (EMT) and inhibited activation f TGF-ß1/Smad2/3 signalling pathways. Collectively, our findings demonstrate that overexpression of the human-specific CHRFAM7A gene can reduce UUO-induced renal fibrosis by inhibiting TGF-ß1/Smad2/3 signalling pathway to reduce inflammatory reactions and EMT of renal tubular epithelial cells.


Subject(s)
Kidney Diseases , Renal Insufficiency, Chronic , Ureteral Obstruction , Animals , Humans , Mice , Epithelial-Mesenchymal Transition/genetics , Fibrosis , Inflammation/metabolism , Kidney/pathology , Kidney Diseases/genetics , Kidney Diseases/prevention & control , Mice, Transgenic , Renal Insufficiency, Chronic/pathology , Transforming Growth Factor beta1/metabolism , Up-Regulation/genetics , Ureteral Obstruction/complications , Ureteral Obstruction/genetics , Ureteral Obstruction/metabolism
4.
Bioorg Med Chem Lett ; 96: 129502, 2023 11 15.
Article in English | MEDLINE | ID: mdl-37806498

ABSTRACT

Camptothecin (CPT) and its derivatives are potent candidates for cancer treatment. However, the clinical applications are largely restricted by non-selectivity and severe toxicities. The peptide transporter 1 (PEPT1), which is highly expressed in human intestines, has been found to be overexpressed in several cancer cells. This discovery suggests that PEPT1 has the potential to serve as a therapeutic target for both improving bioavailability and cancer-targeting treatment. Therefore, a prodrug approach for CPT targeting at PEPT1 highly expressed cancer cells was adopted in the present study. Eighteen CPT prodrugs, its peptidic conjugates, were synthesized and the structures were confirmed by NMR and HRMS. The protein expression profiles of PEPT1 in different cell lines were performed using immunofluorescence assay and western blotting analysis. The cytotoxicity of CPT prodrugs and their uptake via competition with Gly-Sar, a typical substrate of PEPT1, were evaluated in both PEPT1-overexpressed and under expressed cells. The results demonstrated that most CPT prodrugs significantly impaired Gly-Sar uptake, suggesting a higher affinity of CPT-peptidic conjugates for PEPT1 and PEPT1 overexpression cells. In addition, these prodrugs demonstrated a higher capability for inhibiting cell growth in PEPT1 highly-expressed cancer cells compared to PEPT1 under expressed cells. These results indicated that this peptidic prodrug strategy might offer great potential for improved tumor selectivity and chemotherapeutic efficacy of CPT.


Subject(s)
Neoplasms , Prodrugs , Humans , Prodrugs/chemistry , Peptide Transporter 1/metabolism , Cell Line , Biological Transport , Camptothecin/pharmacology , Camptothecin/chemistry
5.
Dig Dis ; 41(6): 852-859, 2023.
Article in English | MEDLINE | ID: mdl-37591214

ABSTRACT

INTRODUCTION: The aim of this study was to investigate outcomes of patients with duodenal Brunner's gland adenomas (BGAs) that were treated endoscopically. METHODS: We identified 71 consecutive patients treated at our center with endoscopic submucosal dissection (ESD) for their duodenal tumors diagnosed pathologically as BGAs over the period between January 1, 2011 and December 31, 2021. We retrospectively analyzed our experience and short- and long-term outcomes of ESD therapy on patients with BGAs. RESULTS: Among 71 BGA patients with an average age of 57 ± 11.7 years (range: 30-82), 48 (67.6%) were male and 23 (32.4%) were female. The accuracy of preoperative diagnosis with endoscopic ultrasonography was 44.0% (22/50). The H. pylori infection was found in 29 patients (29/71, 40.8%). The median size of BGAs was 1.5 cm (interquartile range [IQR] 0.8-2.7 cm). The most common location was the duodenum bulb (50/71, 64.8%). For the ESD procedure, the median operation time was 15.0 min (IQR 9.5-25.5 min). The en bloc and the complete resection rates were 97.2% and 92.3%, respectively. ESD-related mild acute obstructive pancreatitis was present in 2 patients (2/4, 50%) with BGAs located in the ampulla region. During the follow-up period, 1 patient with a positive peripheral margin experienced tumor recurrence 2 years after the initial ESD. There was no disease-related death for the cohort. CONCLUSION: ESD was an effective and safe therapeutic option for BGA patients with excellent outcomes. Long-term follow-up is needed.


Subject(s)
Adenoma , Brunner Glands , Duodenal Neoplasms , Endoscopic Mucosal Resection , Pancreatitis , Humans , Male , Female , Middle Aged , Aged , Duodenal Neoplasms/surgery , Duodenal Neoplasms/pathology , Brunner Glands/surgery , Brunner Glands/pathology , Retrospective Studies , Neoplasm Recurrence, Local/pathology , Duodenum/surgery , Duodenum/pathology , Treatment Outcome , Adenoma/surgery , Adenoma/pathology
6.
J Fluoresc ; 33(1): 393-399, 2023 Jan.
Article in English | MEDLINE | ID: mdl-36434442

ABSTRACT

pH plays a crucial role in cells, especially mitochondria, an important organelle. Developing probes with well-performance for pH detection is still in great demand. Therefore, we first synthesized an indole-based probe (MC-ID-OL) to detect mitochondrial pH changes. The emission wavelength of MC-ID-OL is 649 nm, which does not reach the near-infrared region (650-900 nm). To further enlarge the emission wavelength, probe MC-BI-OL was developed by replacing indolenine with benzoindole. As expected, the emission wavelength changed from 649 to 656 nm. MC-BI-OL probes could also detect pH changes and mitochondria's highly reversible proportional fluorescence localization. In addition, the fluorescence imaging of the MC-BI-OL in HeLa cells demonstrated that this probe could sense changes in the pH of mitochondria in cells.


Subject(s)
Colorimetry , Fluorescent Dyes , Humans , HeLa Cells , Hydrogen-Ion Concentration , Mitochondria
7.
J Fluoresc ; 2023 Jul 27.
Article in English | MEDLINE | ID: mdl-37498366

ABSTRACT

Fluorescent probes are sensitive, selective, nontoxic in detection and thus provided a new solution in biomedical, environmental monitoring, and food safety. In order to expand the application of fluorescent probes in various fields, the paper discusses the design, synthesis, and characterization of fluorescent probes, explores new design and development trends of fluorescent probes in various fields, and improves the performance and applicability of fluorescent probes by using new materials and technologies to meet the evolving demands of molecular detection in various fields.

8.
Mol Biol Rep ; 50(10): 8189-8199, 2023 Oct.
Article in English | MEDLINE | ID: mdl-37563526

ABSTRACT

BACKGROUND: Placenta accreta spectrum (PAS) is mainly characterized by excessive invasion of the uterine muscle layer accompanied by a large number of foreign blood vessels, leading to severe bleeding during and after delivery. However, the mechanism of excessive invasion of nutrient cells in placenta accreta is currently unclear. METHODS: We performed RNA sequencing of 6 PAS patients and 4 control donors, coupled with Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses. The mRNA and protein expression of C-X-C motif ligand 8 (CXCL8) in the placental tissue was measured by qRT‒PCR, immunohistochemical staining and Western blotting. HTR-8/SVneo human villous trophoblast Neo cells were used for in vitro investigation of cell migration and invasion as well as the expression level of CXCL8. RESULTS: A total of 1120 differentially expressed mRNAs were identified in PAS patients. Moreover, GO and KEGG analyses indicated that the differentially expressed mRNAs were most closely associated with immune system processes, biological adhesion and Wnt signaling pathway. The CXCL8 mRNA and protein levels in PAS tissue were significantly higher than those in normal placental tissue. Forced overexpression of CXCL8 significantly increased the migration and invasion of HTR-8/SVneo cells, accompanied by the upregulation of matrix metalloproteinase-2 and matrix metalloproteinase-9 and the downregulation of E-cadherin, which was reversed by knockdown of CXCL8. CONCLUSIONS: CXCL8 was highly expressed in PAS, and knockdown of CXCL8 suppressed the migration and invasion of HTR-8/SVneo cells, suggesting its potential as a diagnostic and therapeutic target for PAS.


Subject(s)
Interleukin-8 , Placenta Accreta , Placenta , Female , Humans , Pregnancy , Cell Movement/genetics , Matrix Metalloproteinase 2/genetics , Matrix Metalloproteinase 2/metabolism , Placenta/metabolism , Placenta Accreta/genetics , Placenta Accreta/metabolism , RNA, Messenger/metabolism , Trophoblasts/metabolism , Interleukin-8/genetics , Interleukin-8/metabolism
9.
Ann Clin Microbiol Antimicrob ; 22(1): 5, 2023 Jan 13.
Article in English | MEDLINE | ID: mdl-36639677

ABSTRACT

BACKGROUND: Maternal rectovaginal colonization with group B Streptococcus (GBS) or Streptococcus agalactiae is the most common pathway for this disease during the perinatal period. This meta-analysis aimed to summarize existing data regarding maternal colonization, serotype profiles, and antibiotic resistance in China. METHODS: Systematic literature reviews were conducted after searching 6 databases. Meta-analysis was applied to analyze colonization rate, serotype, and antimicrobial susceptibility of GBS clinical isolates in different regions of China. Summary estimates are presented using tables, funnel plots, forest plots, histograms, violin plots, and line plots. RESULTS: The dataset regarding colonization included 52 articles and 195 303 pregnant women. Our estimate for maternal GBS colonization in China was 8.1% (95% confidence interval [CI] 7.2%-8.9%). Serotypes Ia, Ib, III, and V account for 95.9% of identified isolates. Serotype III, which is frequently associated with the hypervirulent clonal complex, accounts for 46.4%. Among the maternal GBS isolates using multilocus sequence typing (MLST), ST19 (25.7%, 289/1126) and ST10 (25.1%, 283/1126) were most common, followed by ST12 (12.4%, 140/1126), ST17 (4.8%, 54/1126), and ST651 (3.7%, 42/1126). GBS was highly resistant to tetracycline (75.1% [95% CI 74.0-76.3%]) and erythromycin (65.4% [95% CI 64.5-66.3%]) and generally susceptible to penicillin, ampicillin, vancomycin, ceftriaxone, and linezolid. Resistance rates of GBS to clindamycin and levofloxacin varied greatly (1.0-99.2% and 10.3-72.9%, respectively). A summary analysis of the bacterial drug resistance reports released by the China Antimicrobial Resistance Surveillance System (CARSS) in the past 5 years showed that the drug resistance rate of GBS to erythromycin, clindamycin, and levofloxacin decreased slowly from 2018 to 2020. However, the resistance rates of GBS to all 3 antibiotics increased slightly in 2021. CONCLUSIONS: The overall colonization rate in China was much lower than the global colonization rate (17.4%). Consistent with many original and review reports in other parts of the world, GBS was highly resistant to tetracycline. However, the resistance of GBS isolates in China to erythromycin and clindamycin was greater than in other countries. This paper provides important epidemiological information, to assist with prevention and treatment of GBS colonization in these women.


Subject(s)
Clindamycin , Streptococcal Infections , Female , Pregnancy , Humans , Clindamycin/pharmacology , Clindamycin/therapeutic use , Streptococcal Infections/microbiology , Levofloxacin/pharmacology , Streptococcus agalactiae , Multilocus Sequence Typing , Anti-Bacterial Agents/pharmacology , Anti-Bacterial Agents/therapeutic use , Erythromycin/pharmacology , Tetracycline/pharmacology , Drug Resistance, Bacterial , China/epidemiology , Microbial Sensitivity Tests
10.
BMC Public Health ; 23(1): 1486, 2023 08 04.
Article in English | MEDLINE | ID: mdl-37542247

ABSTRACT

BACKGROUND: Little is known about the potential mechanisms of healthy eating and exercise change, and design interventions which aim to promote healthy eating and exercise change among individuals at risk of metabolic syndrome. This study aimed to identify key determinants of healthy eating, exercise behaviors, and health among individuals at risk of metabolic syndrome using the integrated common-sense model of illness self-regulation. METHOD: A cross-sectional study with a multi-wave data collection strategy. A total of 275 participants at risk of metabolic syndrome based on the clinical prediction model were included in the final analysis. Path analysis was employed to explore the pattern of relationships between key variables using AMOS. RESULTS: The mediation analysis suggested that personal and treatment control, and coherence can positively affect self-reported health via intentions and health behaviors (exercise and healthy eating). Additionally, relationships between self-efficacy (exercise and healthy eating) and health outcomes can be mediated by health behaviors, and both intentions and health behaviors. CONCLUSIONS: This current research used the integrated common-sense model of illness self-regulation to predict healthy eating, exercise behaviors, and self-reported health among individuals at risk of metabolic syndrome. The results suggested that self-efficacy, intention, consequences, personal control, treatment control, and coherence were the key determinants of behavior and health, which can help design interventions to encourage healthy eating and exercise changes among individuals with a high risk of MetS.


Subject(s)
Metabolic Syndrome , Self-Control , Humans , Metabolic Syndrome/epidemiology , Feeding Behavior , Diet, Healthy , Cross-Sectional Studies , Models, Statistical , Surveys and Questionnaires , Prognosis , Health Behavior
11.
Immunopharmacol Immunotoxicol ; 45(6): 709-718, 2023 Dec.
Article in English | MEDLINE | ID: mdl-37382435

ABSTRACT

BACKGROUND: Multiple targets of chimeric antigen receptor T cells (CAR-T cells) are shared expressed by tumor cells and T cells, these self-antigens may stimulate CAR-T cells continuously during the expansion. Persistent exposure to antigens is considered to cause metabolic reprogramming of T cells and the metabolic profiling is critical in determining the cell fate and effector function of CAR-T cells. However, whether the stimulation of self-antigens during CAR-T cell generation could remodel the metabolic profiling is unclear. In this study, we aim to investigate the metabolic characteristics of CD26 CAR-T cells, which expressed CD26 antigens themselves. METHODS: The mitochondrial biogenesis of CD26 and CD19 CAR-T cells during expansion was evaluated by the mitochondrial content, mitochondrial DNA copy numbers and genes involved in mitochondrial regulation. The metabolic profiling was investigated by the ATP production, mitochondrial quality and the expression of metabolism-related genes. Furthermore, we assessed the phenotypes of CAR-T cells through memory-related markers. RESULTS: We reported that CD26 CAR-T cells had elevated mitochondrial biogenesis, ATP production and oxidative phosphorylation at early expansion stage. However, the mitochondrial biogenesis, mitochondrial quality, oxidative phosphorylation and glycolytic activity were all weakened at later expansion stage. On the contrary, CD19 CAR-T cells did not exhibit such characteristics. CONCLUSION: CD26 CAR-T cells showed distinctive metabolic profiling during expansion that was extremely unfavorable to cell persistence and function. These findings may provide new insights for the optimization of CD26 CAR-T cells in terms of metabolism.


Subject(s)
Glycolysis , Mitochondria , Organelle Biogenesis , T-Lymphocytes , T-Lymphocytes/cytology , T-Lymphocytes/metabolism , Dipeptidyl Peptidase 4 , Mitochondria/metabolism , Oxidative Phosphorylation , Metabolome , Humans , Cells, Cultured , Reactive Oxygen Species/metabolism , Matrix Metalloproteinases/metabolism , Receptors, Antigen, T-Cell
12.
J Environ Manage ; 345: 118836, 2023 Nov 01.
Article in English | MEDLINE | ID: mdl-37634403

ABSTRACT

Soil salinization can affect the ecological environment of soil and alter greenhouse gas (GHG) emissions. Chitooligosaccharides and Arbuscular mycorrhizal fungi (AMF) reduced the GHG fluxes of salinized soil, and this reduction was attributed to an alteration in the rhizosphere microecology, including changes in the activities of ß-glucosidase, acid phosphatase, N-acetyl-ß-D-glucosidase, and Leucine aminopeptidase. Additionally, certain bacteria species such as paracoccus, ensifer, microvirga, and paracyclodium were highly correlated with GHG emissions. Another interesting finding is that foliar spraying of chitooligosaccharides could transport to the soybean root system, and improve soybean tolerance to salt stress. This is achieved by enhancing the activities of antioxidant enzymes, and the changes in amino acid metabolism, lipid metabolism, and membrane transport. Importantly, the Co-application of chitooligosaccharides and Arbuscular mycorrhiza fungi was found to have a greater effect compared to their application alone.


Subject(s)
Greenhouse Gases , Mycorrhizae , Glycine max , Rhizosphere , Soil/chemistry , Plant Roots , Fungi , Soil Microbiology
13.
Clin Exp Nephrol ; 26(12): 1233-1239, 2022 Dec.
Article in English | MEDLINE | ID: mdl-36083528

ABSTRACT

OBJECTIVE: We retrospectively analyzed risk factors on in-hospital mortality in CRRT-therapy patients with open cardiac surgery (CS)-induced acute kidney injury (AKI), to provide the clinical basis for predicting and lowering the in-hospital mortality after CS. METHODS: 84 CS-AKI patients with CRRT were divided into survival and death groups according to discharge status, and the perioperative data were analyzed with R version 4.0.2. RESULTS: There were significant differences between the two groups, including: urea nitrogen, Sequential Organ Failure Assessment (SOFA) score and vasoactive-inotropic score (VIS) on the first day after operation; VIS just before CRRT; SOFA score and negative balance of blood volume 24 h after CRRT; the incidence rate of bleeding, severe infection and MODS after operation; and the interval between AKI and CRRT. Univariate logistic regression analysis showed that SOFA score and VIS on the first day after operation; VIS just before CRRT; VIS and negative balance of blood volume 24 h after CRRT; the incidence rate of bleeding, infection and multiple organ dysfunction syndrome (MODS) after operation; bootstrap resampling analysis showed that SOFA score and VIS 24 h after CRRT, as well as the incidence of bleeding after operation were the independent risk factors. CONCLUSION: Maintaining stable hemodynamics and active prevention of bleeding are expected to decrease the in-hospital mortality.


Subject(s)
Acute Kidney Injury , Cardiac Surgical Procedures , Humans , Hospital Mortality , Renal Replacement Therapy , Retrospective Studies , Multiple Organ Failure/etiology , Acute Kidney Injury/etiology , Acute Kidney Injury/therapy , Cardiac Surgical Procedures/adverse effects , Risk Factors
14.
J Wound Ostomy Continence Nurs ; 49(1): 78-86, 2022.
Article in English | MEDLINE | ID: mdl-35040817

ABSTRACT

PURPOSE: The purpose of this study was to explore the prevalence of urinary incontinence (UI) and several subtypes: (stress, urge, and mixed UI) and the influence of multiple factors on the likelihood of UI. DESIGN: Epidemiological study based on cross-sectional data collection. SUBJECTS AND SETTING: The sample comprised 1279 inhabitants 65 years and older residing in 10 villages randomly selected from the Shanxi province, located in North China. METHODS: The presence and types of UI were assessed using the International Consultation of Incontinence Questionnaire-Short Form. Sociodemographic parameters were also recorded, along with data on lifestyle, bowel function, and medical conditions. The Activity of Daily Living Scale and Mini-Mental State Examination instruments were used to evaluate physical and cognitive functions, respectively. A multivariate logistic regression model with the backward method was employed to identify factors associated with UI. RESULTS: The prevalence of any UI among the rural Chinese elderly 65 years and older was 46.8%, with a female predominance (56.3% in females vs 35.0% in males). The most common incontinence subtype in women was mixed UI (n = 170, 24.0%), followed by stress UI (n = 131, 18.5%) and urge UI (n = 97, 13.7%). The most prevalent form of UI in males was urge UI (n = 190, 33.2%), followed by stress UI (n = 5, 0.9%) and mixed UI (n = 5, 0.9%). Less than one quarter of respondents (17%, n = 102) of participants with UI had consulted a doctor. Multivariate analysis found that poorer physical function, poor quality of sleep, and fecal incontinence were common factors associated with UI in both women and men. In women, higher body mass index and constipation were also independent correlates, as were poor vision and heart disease in men. Poorer physical function was associated with all UI subtypes. For female stress UI, poorer cognitive status, tea drinking, and hypertension also emerged as independent risk factors. Heart disease was an independent risk factor in both female and male urge UI; as was consumption of a non-plant-based diet for female mixed and urge UI; nonfarmer and traumatic brain injury for female urge UI; and poor vision and fecal incontinence in male urge UI. CONCLUSIONS: Chinese rural citizens showed a high UI prevalence, but only a small proportion had consulted a health care provider. Physical function decline was the most important contributor to UI among participants. Individualized intervention programs targeting modifiable risk factors among high-risk populations should be developed.


Subject(s)
Urinary Incontinence , Adult , Aged , China/epidemiology , Cross-Sectional Studies , Female , Humans , Male , Prevalence , Risk Factors , Surveys and Questionnaires , Urinary Incontinence/complications , Urinary Incontinence/epidemiology
15.
Chem Res Toxicol ; 34(1): 70-79, 2021 01 18.
Article in English | MEDLINE | ID: mdl-33356180

ABSTRACT

Diclofenac sodium (DFS), a nonsteroidal anti-inflammatory drug, is frequently used in ophthalmology, but it causes negative effects on corneas. The mechanisms underlying the toxicities to corneas remains unclear. The present study was designed to assess the cytotoxicity of DFS to human corneal epithelial (HCEP) cells in vitro and further investigate its related mechanisms. The HCEP cells were treated with DFS at different concentrations ranging from 0.003 125% to 0.1%. DFS showed a dose- and time-dependent cytotoxicity to HCEP cells including abnormal morphology and declined viability. The 0.05% DFS-treated HCEP cells presented cell cycle arrest at S phase, reactive oxygen species (ROS) overproduction, and positive staining of phosphorylated H2AX, suggesting that DFS caused ROS-mediated DNA damage. The upregulation of p53 expression, formation of apoptotic body, phosphatidylserine externalization, and DNA ladder demonstrated that the p53-dependent apoptosis pathway was involved in the cytotoxicity of DFS. Furthermore, DFS activated caspase-8, caspase-9, and caspase-3 altered the expression levels of Bcl-2 family proteins including tBid, Bax, and Bcl-2, as well as increased poly(ADP-ribose) polymerase (PARP) cleavage. DFS also induced ΔΨm disruption, resulting in the release of cytochrome c and apoptosis-inducing factor into the cytoplasm. Additionally, the DFS-induced apoptosis was alleviated by p53 inhibitor. Taken together, DFS triggered p53-dependent apoptosis in HCEP cells via ROS-mediated crosstalk between the extrinsic and intrinsic pathways.


Subject(s)
Apoptosis/drug effects , Diclofenac/pharmacology , Epithelium, Corneal/drug effects , Reactive Oxygen Species/metabolism , Cell Survival/drug effects , Cells, Cultured , DNA Damage , Diclofenac/chemistry , Epithelium, Corneal/metabolism , Humans , Reactive Oxygen Species/analysis
16.
Pediatr Blood Cancer ; 68(10): e29254, 2021 10.
Article in English | MEDLINE | ID: mdl-34331507

ABSTRACT

INTRODUCTION: Sickle cell anemia (SCA) results in numerous adverse effects on the brain, including neurocognitive dysfunction. Hydroxyurea has been utilized extensively for management of SCA, but its effects on brain function have not been established. METHODS: We examined prospectively the effects of 1 year of treatment with hydroxyurea on brain function in children with SCA (HbSS/HbSß0 -thalassemia) by baseline and exit evaluations, including comprehensive neurocognitive testing, transcranial Doppler ultrasound (TCD), and brain MRI (silent cerebral infarcts [SCI], gray matter cerebral blood flow [GM-CBF], and blood oxygen level-dependent [BOLD] signal from visual stimulation). RESULTS: Nineteen patients with SCA, mean age 12.4 years (range 7.2-17.8), were evaluated. At baseline, subjects had these mean values: full-scale IQ (FSIQ) 82.8, TCD velocity 133 cm/s, GM-CBF 64.4 ml/100 g/min, BOLD signal 2.34% increase, and frequency of SCI 47%. After 1 year of hydroxyurea, there were increases in FSIQ (+2, p = .059) and reading passage comprehension (+4, p = .033), a significant decrease in TCD velocity (-11 cm/s, p = .007), and no significant changes in GM-CBF, BOLD, or SCI frequency. Hemoglobin F (HbF) was associated with passage comprehension, hemoglobin with lower TCD velocity, and lower GM-CBF with greater working memory. Higher BOLD signal was associated with higher processing speed and lower TCD velocity with higher math fluency. DISCUSSION: Improvements in neurocognition and decreased TCD velocity following 1 year of treatment support hydroxyurea use for improving neurocognitive outcomes in SCA. Understanding the mechanisms of benefit, as indicated by relationships of neurocognitive function with HbF, hemoglobin, and CBF, requires further evaluation.


Subject(s)
Anemia, Sickle Cell , Brain , Hydroxyurea , Adolescent , Anemia, Sickle Cell/drug therapy , Anemia, Sickle Cell/physiopathology , Brain/drug effects , Brain/physiopathology , Child , Hemoglobins , Humans , Hydroxyurea/adverse effects , Hydroxyurea/therapeutic use , Oxygen Saturation , Ultrasonography, Doppler, Transcranial
17.
BMC Psychiatry ; 21(1): 460, 2021 09 21.
Article in English | MEDLINE | ID: mdl-34548045

ABSTRACT

BACKGROUND: Although studies indicate that social support is related to emotional exhaustion, depression symptoms, and anxiety symptoms, the underlying mechanism between those variables remains unknown. METHODS: Based on a sample of 254 residents in standardized residency training programs, two mediation models were tested in which emotional exhaustion served as a mediator in the relationship between social support and anxiety symptoms/depression symptoms. We used the following self-reported questionnaires as instruments to collect data: zung self-rating depression scale, zung self-rating anxiety scale, social support rating scale, and emotional exhaustion scale. RESULTS: In the final study sample, the mean age of the residents was 25.92 years old (SD =1.88), and a total of 41.3% were male, and 58.7% were female. This current study suggested that social support was proven to be a relevant factor affecting anxiety symptoms and depression symptoms. Particularly, the results also indicated that emotional exhaustion partially mediated the impact of social support on anxiety symptoms and depression symptoms among Chinese residents in the standardized residency training program. CONCLUSIONS: Our study signifies that enhancements in social support and reduction of emotional exhaustion can directly or indirectly affect anxiety symptoms and depression symptoms among Chinese residents in the standardized residency training program. These findings will offer insight for health-sector managers to develop programs aimed at social support and adopt individual-level interventions and organization-level interventions to reduce emotional exhaustion.


Subject(s)
Depression , Internship and Residency , Adult , Anxiety/diagnosis , Depression/diagnosis , Emotions , Female , Humans , Male , Social Support , Surveys and Questionnaires
18.
BMC Womens Health ; 21(1): 189, 2021 05 06.
Article in English | MEDLINE | ID: mdl-33957910

ABSTRACT

BACKGROUND: Many factors influence the menopausal transition and the complexity of this transition increases with the addition of immigration transition. This review aims to identify the factors that influence the menopausal transition for immigrant women based on ecosocial theory. METHODS: A scoping review of English publications was conducted according to PRISMA guidelines using CINAHL, AgeLine, MEDLINE, PsycINFO, ERIC, Nursing and Allied Health Database, PsycARTICLES, Sociology Database, and Education Research Complete. Thirty-seven papers were included for this review. RESULTS: The factors which influence the menopausal transition for immigrant women were grouped into three categories: (a) personal factors, (b) familial factors, and (c) community and societal factors. Personal factors include income and employment, physical and psychological health, perceptions of menopause, and acculturation. Familial factors include partner support, relationships with children, and balancing family, work, and personal duties. Community and societal factors encompassed social network, social support, healthcare services, traditional cultural expectations, and discrimination in host countries. CONCLUSIONS: Interventions addressing the menopausal transition for immigrant women should be designed considering different psychosocial factors and actively work to address systemic barriers that negatively impact their transition.


Subject(s)
Emigrants and Immigrants , Emigration and Immigration , Child , Female , Health Status , Humans , Menopause , Social Support
19.
Geriatr Nurs ; 42(2): 491-501, 2021.
Article in English | MEDLINE | ID: mdl-32807555

ABSTRACT

With an increasing number of older people who require homecare services, clients must develop a therapeutic self-care ability in order to manage their health safely in their homes. Therapeutic self-care is the ability to take medications as prescribed, and to recognize and manage symptoms that may be experienced, such as pain. This qualitative research study utilized one-on-one, in-depth, semi-structured interviews with the clients and their informal caregivers recruited from one homecare agency in Ontario, Canada. The goal of the interviews was to gain a better understanding of the relationship between client's therapeutic self-care ability and homecare safety outcomes, and the role of self-care and caregiving activities in supporting homecare safety in relation to chronic disease management. A total of fifteen older homecare clients (over the age of 65) and fifteen informal caregivers were interviewed in their homes. Qualitative description was the methodological approach used to guide the research study. Thematic analyses of the qualitative interview data revealed that homecare clients and their informal caregivers are struggling with multiple aspects of safety challenges. The study findings provided insight into safety problems related to therapeutic self-care at home, and this knowledge is vital to policy formulation related to the role of healthcare professionals in improving client's therapeutic self-care ability to reduce safety related risks and burden for older homecare recipients. Protocol Reference and REB approval (#27223) was obtained from University of Toronto Research Ethics Board.


Subject(s)
Home Care Services , Self Care , Aged , Caregivers , Humans , Ontario , Qualitative Research
20.
Sichuan Da Xue Xue Bao Yi Xue Ban ; 52(3): 373-379, 2021 May.
Article in Zh | MEDLINE | ID: mdl-34018353

ABSTRACT

Idiopathic pulmonary fibrosis (IPF) is a type of pulmonary disease that progresses acutely or slowly into irreversible pulmonary diseases, resulting in the end severe damages to patients' lung functions, as well as deaths. At present, the pathogenesis of pulmonary fibrosis is still not clear and there is no effective therapeutic measure available to control the progression of the disease. Research findings indicate that stem cells, being the origin of all cells of organisms, participate in the development of individuals at various stages and play an important role in repairing pulmonary tissue damage. Stem cells are attracting growing attention in the field of regenerative medicine, providing new ideas for treating IPF with transplanted stem cells. Herein, in order to better explore the potential applications of stem cell transplantation in treating IPF, we attempt to summarize preliminary studies of stem cell-mediated pulmonary remodeling after IPF, as well as cutting-edge clinical trials in stem cell-based IPF therapy.


Subject(s)
Idiopathic Pulmonary Fibrosis , Mesenchymal Stem Cell Transplantation , Humans , Idiopathic Pulmonary Fibrosis/therapy , Lung , Wound Healing
SELECTION OF CITATIONS
SEARCH DETAIL