Falcaria vulgaris extract: A mixture of quorum sensing inhibitors for controlling Pectobacterium carotovorum subsp. carotovorum.

A promising strategy to control bacterial diseases involves using Quorum Sensing Inhibitor (QSI) compounds. This study aimed to evaluate the potential of Falcaria vulgaris plant extract to combat the phytopathogenic Pectobacterium carotovorum subsp. carotovorum (Pcc) via its QSI activity. Using biosensors and Minimum Inhibitory Concentration (MIC) assays, the QSI and antimicrobial aspects of the extract were assessed. Furthermore, the effect of the extract on the reduction of tuber maceration in potatoes was examined. Subsequently, homology modeling based on LasR was conducted to analyze interactions between ligand 3-oxo-C8-AHL, and ExpR2 protein. Docking studies were performed on all extract compounds identified via Gas Chromatography-Mass Spectrometry (GC-MS) analysis. The extract effectively reduced maceration at sub-MIC concentrations across various pathogenic strains. Furthermore, Cyclopentadecanone, 2-hydroxy, showed more negative docking energy than the native ligand. Z,E-2,13-Octadecadien-1-ol showed energy equivalence to the native ligand. Additionally, this plant included certain compounds or their analogs that had previously been discovered as QSI compounds. These compounds included oleic acid, n-Hexadecanoic acid, cytidine, and linoleic acid, and they had energies that were comparable to that of the native ligand. In conclusion, the remarkable QSI property showed by this plant is likely attributed to a combination of compounds possessing this characteristic.

Manifestation of Ocular Myasthenia Gravis as an Initial Symptom of Coronavirus Disease 2019: A Case Report.

For a while, coronavirus disease-2019 (COVID-19) has been a major global pandemic. It primarily affects the respiratory system but has extrapulmonary manifestations such as gastrointestinal and neurological symptoms. Data on myasthenia gravis (MG), as a complication of COVID-19, are limited. We herein report the manifestation of ocular MG as an initial symptom of COVID-19. In November 2020, a 31-year-old healthy woman was referred to Firoozgar Hospital (Tehran, Iran) with left upper eyelid ptosis and diplopia as well as general weakness, myalgia, fever, and nasal congestion for four days prior to admission. Although the acetylcholine receptor antibody in her serum was negative, increased jitter in several muscles led to the diagnosis of ocular MG. Nasal swab reverse transcription-polymerase chain reaction (RT-PCR) assay tested positive for severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) infection. Computed tomography (CT) scan of the chest revealed bilateral ground-glass opacities and some foci of consolidation formation, but the thymus was normal. The patient was successfully treated with remdesivir and dexamethasone. The patient was eventually discharged in good condition and with improved neurological symptoms. A limited number of studies have suggested a possible association between MG and COVID-19. Therefore, further data are required to substantiate the proposed association. Clinicians should be aware of ocular MG during the COVID-19 pandemic to better diagnose and manage patients with SARS-CoV-2 infection.

Potential role of gut microbiota in patients with COVID-19, its relationship with lung axis, central nervous system (CNS) axis, and improvement with probiotic therapy.

Coronavirus Disease 2019 (COVID-19) is a pandemic disease caused by a new corona virus. COVID-19 affects different people in different ways. COVID-19 could affect the gastrointestinal system via gut microbiota impairment. Gut microbiota could affect lung health through a relationship between gut and lung microbiota, which is named gut-lung axis. Gut microbiota impairment plays a role in pathogenesis of various pulmonary disease states, so GI diseases were found to be associated with respiratory diseases. Moreover, most infected people will develop mild to moderate gastrointestinal (GI) symptoms such as diarrhea, vomiting, and stomachache, which is caused by impairment in gut microbiota. Therefore, the current study aimed to review potential role of gut microbiota in patients with COVID-19, its relation with lung axis, Central Nervous System (CNS) axis and improvement with probiotic therapy. Also, this review can be a guide for potential role of gut microbiota in patients with COVID-19.

Empirically-Derived Dietary Patterns in Relation to Non-Alcoholic Fatty Liver Diseases Among Adult Participants in Amol, Northern Iran: A Structural Equation Modeling Approach.

Dietary modifications remain the mainstay in managing nonalcoholic fatty liver disease (NAFLD). Published data on the effect of overall dietary patterns on NAFLD is scarce. The present study aims to extract the dietary patterns and investigate their association to NAFLD by gender, using structural equation modeling, among adult participants in Amol, northern Iran. In this cross-sectional study, data from 3,149 participants in the Amol cohort study (55.3% men, n = 1,741) were analyzed. Usual dietary intake was assessed by a validated 168-items semiquantitative food frequency questionnaire. We classified major dietary patterns by explanatory factor analysis (EFA) and confirmatory factor analysis (CFA). NAFLD diagnosis was based on ultrasound scanning, including increased hepatic echogenicity, abnormal appearance of hepatic arteries, and diaphragm in the absence of excessive alcohol consumption. Multivariable logistic regression and structural equation modeling (SEM) were used to explore the relationship between dietary patterns and NAFLD. Three distinct dietary patterns, including western, healthy, and traditional/mixed dietary patterns, were identified. Adult male who adhere to the western dietary pattern were more affected with NAFLD risk [Q1, Q2, Q3, Q4, odds ratio (OR) = 1, 1.16, 1.34, 1.39; 95% confidence interval (CI) = 0.83-1.61, 0.96-1.85, 0.98-1.96, p trend = 0.04, respectively]. A full mediating effect of healthy dietary pattern, western dietary pattern, and traditional dietary pattern via dietary acid load (DAL) proxy (of dietary patterns to DAL: ßstd = -0.35, p < 0.006, ßstd = 0.15, p = 0.009, and ßstd = 0.08, p = 0.001, respectively), on NAFLD was found through mediation analysis using SEM. A western dietary pattern comprising frequent intake of salty and sweet snacks, soft drinks, refined grains, processed meats, cooked and fried potatoes, eggs, and coffee was associated with a higher odds of NAFLD in an Iranian male population. Additionally, our findings might provide a mechanistic explanation for the association between dietary patterns and NAFLD via DAL proxy. However, further prospective studies, including assessing acid-base biomarkers, are needed.

Does serum 25 hydroxy vitamin D level predict disease activity in ulcerative colitis patients?

BACKGROUND/AIM: There are controversial results regarding the relationship of serum 25 hydroxy vitamin D [25(OH)D] and ulcerative colitis (UC) activity. To address this issue, the current study was designed to evaluate the correlation of serum 25(OH)D level and disease activity in patients with UC. METHOD: All consecutively selected UC outpatients referred to a gastroenterology clinic were enrolled in 2014. UC was diagnosed based on clinical, colonoscopic and histologic findings by a gastroenterologist. The exclusion criteria consisted of the factors that might influence plasma 25(OH)D concentration including inadequate exposure or intake, reduced absorption and abnormal metabolism. Disease activity was assessed by 'Truelove and Witts' classification'. RESULTS: Fifty UC patients with mean age of 36.98 (± 11.81) years were evaluated. Mean serum 25(OH)D concentrations were significantly higher in 'mild disease activity' group (27.06 ± 6.56 ng/ml) than 'moderate disease activity' group (11.14 ± 4.03 ng/ml). Lower serum 25(OH)D concentration was associated with an increased likelihood of exhibiting moderate disease activity [ß = 0.37, 95% confidence interval (CI): 0.15-0.94, p value = 0.04]. CONCLUSION: Lower serum 25(OH)D level might be associated with higher disease activity in UC patients with mild-to-moderate activity.