Evaluating the potential mediating role of ADAMTS13 activity in the relationship between obesity and the severity of COVID-19: A retrospective cohort study.

Obesity and low enzyme A disintegrin and metalloproteinase with thrombospondin type-1 motif-13 (ADAMTS13) activity have been linked to poor coronavirus disease 2019 (COVID-19). Given that obesity may influence ADAMTS13 activity, it is feasible; however, it remains unclear whether ADAMTS13 activity acts as a mediator between obesity and COVID-19 outcomes. We investigated the link between body mass index (BMI) and COVID-19 outcomes, using ADAMTS13 activity as a mediator. ADAMTS13 activity was measured in 86 hospitalized COVID-19 patients. BMI, ADAMTS13 activity, and COVID-19 outcomes were assessed. Obese patients had a high odds ratio for low ADAMTS13 levels. When different levels of ADAMTS13 activity were considered, the severity of COVID-19 in obese patients was 4.5 times that in the normal BMI group. Furthermore, increased coagulopathy indicators correlated with low ADAMTS13 activity. Patients with elevated ALT and AST levels showed a 3 to 4-fold increase in the chances of low ADAMTS13 activity (OR:3.19, 95% CI:1.22-8.90, P = .021; OR:2.17, 95% CI:0.91-5.27, P = .082, respectively). When ADAMTS13 activity was considered, obese patients had greater COVID-19 severity and slower viral clearance than those with normal BMI. Low ADAMTS13 activity and impaired liver function are associated with poor COVID-19 outcomes. These findings encourage researchers to use molecular component identification to study the effects of obesity on the von Willebrand factor (VWF)/ADAMTS13 axis, COVID-19 pathogenesis, and outcomes.

The potential impact and diagnostic value of inflammatory markers on diabetic foot progression in type II diabetes mellitus: A case-control study.

BACKGROUND: The wound-healing process in diabetic foot is affected by pro and anti-inflammatory markers, and any disruption in the inflammatory reaction interferes with tissue homeostasis, leading to chronic non-wound healing. AIM: This study aimed to determine the diagnostic value and effect of CRP, IL-6, TNF, and HbA1c on initiation the and progression of diabetic foot ulcers. METHOD: ELISA was used to quantify IL-6, TNF, CRP, and HbA1c in 205 patients with diabetes, and 105 were diabetic foot free. The prevalence and progression of diabetic foot were also evaluated. The area under the curve (AUC) was calculated using the receiver operating characteristic (ROC) curve to analyze the predictive values. Forward stepwise logistic regression analysis was used to compute the odds ratio (OR) and the corresponding 95% confidence intervals (CIs). RESULTS: CRP, IL-6, and FBS were found to be significant predictors of diabetic foot (OR=1.717, 95% CI=1.250-2.358, P=0.001; OR=1.434, 95% CI=1.142-1.802, P=0.002; and OR=1.040, 95% CI=1.002-1.080, P=0.037), respectively. The AUCs for CRP, IL-6, and HbA1c in predicting diabetic foot were 0.839, 0.728, and 0.834, respectively, demonstrating a good predictive value for each diagnostic marker. CONCLUSION: The current study demonstrated that IL-6, CRP, and HbA1c may be useful biomarkers to indicate diabetic foot progression. Furthermore, our findings showed a substantial relationship between CRP and HbA1c in individuals with diabetic foot conditions.

Antioxidant, antibacterial, and molecular docking of methyl ferulate and oleic acid produced by Aspergillus pseudodeflectus AUMC 15761 utilizing wheat bran.

Secondary metabolites (SMs) are the primary source of therapeutics and lead chemicals in medicine. They have been especially important in the creation of effective cures for conditions such as cancer, malaria, bacterial and fungal infections, neurological and cardiovascular problems, and autoimmune illnesses. In the present study, Aspergillus pseudodeflectus AUMC 15761 was demonstrated to use wheat bran in solid state fermentation (SSF) at optimum conditions (pH 7.0 at 30 °C after 10 days of incubation and using sodium nitrate as a nitrogen source) to produce methyl ferulate and oleic acid with significant antioxidant and antibacterial properties. Gas chromatography-mass spectrometry (GC-MS) analysis of the crude methanol extract revealed eleven peaks that indicated the most common chemical components. Purification of methyl ferulate and oleic acid was carried out by column chromatography, and both compounds were identified by in-depth spectroscopic analysis, including 1D and 2D NMR and HR-ESI-MS. DPPH activity increased as the sample concentration increased. IC50 values of both compounds obtained were 73.213 ± 11.20 and 104.178 ± 9.53 µM, respectively. Also, the MIC value for methyl ferulate against Bacillus subtilis and Staphylococcus aureus was 0.31 mg/mL, while the corresponding MIC values for oleic acid were 1.25 mg/mL and 0.62 mg/mL for both bacterial strains, respectively. Molecular modeling calculations were carried out to reveal the binding mode of methyl ferulate and oleic acid within the binding site of the crucial proteins of Staphylococcus aureus. The docking results were found to be well correlated with the experimental data.

Interleukin-6 and the determinants of severe COVID-19: A retrospective cohort study.

Cytokines, notably interleukin-6 (IL-6), increase considerably in patients with severe corona virus disease 2019 (COVID-19). This vigorous immune response may cause end-organ failure or death; hence, measuring IL-6 in the context of patient characteristics may help predict outcomes and encourage early comprehensive therapy. This study investigated the association between serum IL-6 levels, COVID-19 severity, and demographic, clinical, and biochemical characteristics. COVID-19 inpatients in NMC hospitals were investigated between November 2020 and November 2021. Several patient variables related to serum IL-6 and COVID-19 severity have been examined. The study included 374 COVID-19 inpatients, 235 of whom had severe disease with a median age of 51. The elderly had an increased risk of severe COVID-19 (73.8%) compared with young adults (71%), with higher white blood cells, D-dimer, Lactate dehydrogenase, creatinine, ferritin, prothrombin time, Procalcitonin, and fibrinogen levels (P < .001). C-reactive protein, troponin, intensive care unit admission, disease severity score, and mortality were significantly associated with higher serum IL-6 levels (P = .05) in the univariate analysis, but this significance disappeared in the multivariate analysis. IL-6, along with other demographic and clinical variables affected COVID-19 severity. These characteristics may predict patients at risk of severe disease and assist in establishing early comprehensive disease outcome strategies. Large-scale clinical research is needed to emphasize IL-6 and COVID-19.

Arylated gold nanoparticles have no effect on the adipogenic differentiation of MG-63 cells nor regulate any key signaling pathway during the differentiation.

OBJECTIVE: MG-63 cells that have osteoblastic and adipogenic differentiation potential were evaluated for internalization, and adipogenic differentiation in the presence and absence of the covalently functionalized aryl gold nanoparticles (AuNPs-C6H4-4-COOH). RESULTS: Inductively coupled plasma, flow cytometry and confocal microscopy analyses confirmed that gold nanoparticles were easily internalized by MG-63 cells. The MG-63 cells were differentiated into adipocytes without gold-aryl nanoparticles and with the gold-aryl nanoparticles at 5 µM concentration in both induction and maintenance media. The lipid content assay and the relative expressions of PPAR-γ, ADR1, GLUT1 and GLUT4 genes showed no significant variation with and without the gold nanoparticles treatment. Differential phosphorylation levels of 43 kinases phosphorylation sites were evaluated using the human phospho-kinase array to assess the effect of the gold nanoparticles on the signaling pathways during the differentiation. No kinase phosphorylation site was differentially phosphorylated with two or more folds after the nanoparticles treatment after the first day as well as at the end of MG-63 cells differentiation. The gold-aryl nanoparticles do not affect MG-63 cells differentiation into adipocytes neither do they affect any key signaling pathway. These properties make these gold nanoparticles suitable for future drug delivery and medical applications.

Evaluation of the Infill Design on the Tensile Response of 3D Printed Polylactic Acid Polymer.

The current study explores the effects of geometrical shapes of the infills on the 3D printed polylactic acid (PLA) plastic on the tensile properties. For this purpose, by utilizing an accessible supply desktop printer, specimens of diamond, rectangular, and hexagonal infill patterns were produced using the fused filament fabrication (FFF) 3D printing technique. Additionally, solid samples were printed for comparison. The printed tensile test specimens were conducted at environmental temperature, Ta of 23 °C and crosshead speed, VC.H of 5 mm/min. Mainly, this study focuses on investigating the percentage infill with respect to the cross-sectional area of the investigated samples. The mechanical properties, i.e., modulus of toughness, ultimate tensile stress, yield stress, and percent elongation, were explored for each sample having a different geometrical infill design. The test outcomes for each pattern were systematically compared. To further validate the experimental results, a computer simulation using finite element analysis was also performed and contrasted with the experimental tensile tests. The experimental results mainly suggested a brittle behavior for solidly infilled specimen, while rectangular, diamond, and hexagonal infill patterns showed ductile-like behavior (fine size and texture of infills). This brittleness may be due to the relatively higher infill density results that led to the high bonding adhesion of the printed layers, and the size and thickness effects of the solid substrate. It made the solidly infilled specimen structure denser and brittle. Among all structures, hexagon geometrical infill showed relative improvement in the mechanical properties (highest ultimate tensile stress and modulus values 1759.4 MPa and 57.74 MPa, respectively) compared with other geometrical infills. Therefore, the geometrical infill effects play an important role in selecting the suitable mechanical property's values in industrial applications.

Prognosis of spinal infections managed by minimal debridement: A case series in two tertiary centers.

BACKGROUND: Spinal infections can be challenging in their management and include spondylitis, epidural abscess, and spondylodiscitis. Usual treatment is conservative through antimicrobials or surgery to decompress neural tissue, debride all infected tissues, and fix if needed. We propose the concept of surgery without formal debridement aiming at neural protection. METHODS: The study was performed at two tertiary centers on 25 patients with clinical findings. One patient was treated conservatively and the rest surgically by laminectomy and fixation if needed. Evacuation of fluid pus was performed. In the cervical and the thoracic region, if the granulation tissue was anterior to the cord, only decompression by laminectomy was done. RESULTS: Low back pain was present in 22 cases (88%), 16 cases (64%) had lower limb pain, and 12 cases (48%) had weakness. The level of spinal infection was lumbar in 15 cases (60%), thoracic in 9 cases (36%) cases, and cervical in 1 case (4%). The type of infection was epidural abscess in 20 cases (80%), discitis in 16 cases (64%), and vertebral osteomyelitis in 12 cases (48%). Laminectomy was performed in 20 cases (80%) and fixation in 17 cases (68%). The symptoms improved in all cases. On follow-up, the lesion was reduced in 14 patients (56%) and disappeared in 11 cases (44%). One case required ventriculoperitoneal shunt placement due to postinfectious hydrocephalus. CONCLUSION: Dealing with spinal infections surgically through decompression or fixation with minimal debridement of infected tissue appears to be a safe and effective method of management.

Visceral Leishmaniasis, Northern Somalia, 2013-2019.

We identified visceral leishmaniasis caused by Leishmania donovani in a previously unknown focus in northern Somalia. Clinical and epidemiologic characteristics of 118 cases during 2013-2019 in Bosaso, the region's commercial capital, have raised suspicion of visceral leishmaniasis endemicity status there.

Comparison between analgesic effect of bupivacaine thoracic epidural and ketamine infusion plus wound infiltration with local anesthetics in open cholecystectomy.

BACKGROUND: Neuraxial blocks result in sympathetic block, sensory analgesia and motor block. Continuous epidural anesthesia through a catheter offers several options for perioperative analgesia. Local anesthetic boluses or infusions can provide profound analgesia. Although the role of low-dose ketamine (<2 mg/kg intramuscular, <1 mg/kg intravenous [IV] or ≤ 20 µg/kg/min by IV infusion) in the treatment of post-operative pain is controversial, perioperative administration of a small dose of ketamine may be valuable to a multimodal analgesic regimen. A local anesthetic can be used for wound infiltration intra-operative to minimized the surgical pain. PATIENTS AND METHODS: A prospective randomized study was performed in which 40 patients scheduled for elective open cholecystectomy under general anesthesia admitted to the Medical Research Institute were included and further subdivided into two groups, group A, received thoracic epidural catheter at T7-8, activation was done 20 min before induction of anesthesia with plain bupivacaine at a concentration of 0.25% at a volume of 1 ml/segment aiming to block sensory supply from T4-L2, then received continuous thoracic epidural infusion intra and postoperatively with plain bupivacaine at a concentration of 0.125% at a rate of 5 ml/h for 24 h, group B received 0.3 mg/kg bolus of ketamine at the time of induction then 0.1 mg/kg/h ketamine IV infusion during surgery followed by wound infiltration with 15 ml of plain bupivacaine 0.5% at the time of skin closure. RESULTS: Bupivacaine thoracic epidural analgesia had better control on heart rate and mean arterial blood pressure than ketamine infusion plus wound infiltration with local anesthetic in patients undergoing open cholecystectomy. CONCLUSION: Thoracic epidural analgesia had better control on hemodynamic changes intra-and postoperatively than ketamine infusion with local wound infiltration in open cholecystectomy.