We study here, the dynamics and stability behaviour of mathematical model of virus spread in population and its interaction with human immune systems cells. The endemic equilibrium points are nd and local stability analysis to all equilibria points of the related model are obtained. Further the global stability analysis either, at disease free equilibria, andco at endemic equilibria is discussed by constructing Lyapunov function which show the validity of the concern model exist.

In this article, we compound the fractional order difference operator with the Lucas matrix and introduce the new difference sequence spaces. Also, we investigate some topological properties and give Schauder basis. Finally, we examine the geometric structure of this space.

Abstract Objective: Women born preterm or with low birthweight (LBW) have an increased future risk of gestational diabetes mellitus (GDM); however, a quantitative summary of evidence is lacking. Herein, we aimed to investigate whether LBW, small for gestational age (SGA) status, or preterm birth are factors associated with GDM risk; moreover, the evidence quality was assessed. Data Sources: We searched databases such as MEDLINE, Embase, and CINAHL and study registries including ClinicalTrials.gov and ICTRP from launch until October 29, 2020. Methods of Study Selection: Major electronic databases were searched from inception to October 29, 2020. Observational studies that examined the association between birth weight or gestational age and GDM were eligible. We pooled the odds ratios and 95% confidence intervals using the DerSimonian and Laird random-effects model. Tabulation, Integration, and Results: Eighteen studies were included (N = 827,382). The meta-analysis showed that being born preterm, with LBW, or with SGA status increased the risk of GDM (pooled odds ratio = 1.84; 95% confidence interval: 1.54 to 2.20; I2 = 78.3%; τ2 = 0.07). Given a GDM prevalence of 2.0%, 10%, and 20%, the absolute risk differences were 1.6%, 7.0%, and 11.5%, respectively. The certainty of evidence was low due to serious concerns of risk of bias and publication bias. Conclusion: Women born prematurely, with LBW, or with SGA status may be at an increased risk of GDM. However, whether this should be considered in clinical decision-making depends on the prevalence of gestational diabetes mellitus. Protocol registration: PROSPERO (CRD42020142004)

Visceral leishmaniasis (VL) is a disseminated protozoan infection of the lymphoreticular system. The disease manifestation appears owing to a severe defect in the immune system of the host. Understanding the immune status (especially IL-17) and their cross-regulation in light of Treg dominant suppressive milieu is imperative in visceral leishmaniasis patients. The present study was carried out in peripheral blood samples of thirty-four VL patients. We observed a significantly low percentage frequency of IL-17A+CD4+T cells and IL-17RA expression on monocytes; in contrast significantly higher percentage frequency of activated T cells, Treg cells and IL-10RA expression was observed on T cell subsets and monocytes of VL patients. Further, the activated T cell frequency positively correlated with Treg cell frequency while negatively correlated with T effector cells frequency. Furthermore, the rescue of IL-17A+CD4 T cells was observed in absence of Treg cells and the blocking of IL-10 and TGF-β in vitro. Moreover, suppressive cytokines down-regulate IL-17RA expression on monocytes. Our results suggest that Treg cells possibly play a dominant role in dampening the effector immune response; abrogation of Treg milieu may help in the significant rescue of protective T cell response that may help in immune restoration among visceral leishmaniasis patients.

Bulk metallic glass (BMG) have attracted considerable attention during the last decades due to their excellent physical, chemical, and biomedical properties. This report aims to investigate the relationship between antibacterial performance, crystallization behavior and laser ablation parameters of Zr-based bulk metallic glass (Zr-BMG) after nanosecond laser irradiation. The surface morphology, crystallization behavior, surface quality, binding energy and Cu/Ni release properties were explored after laser irradiation. The formation of reactive oxygen species following the immersion of Zr-BMG in phosphate-buffered saline was evaluated using the 2’,7’-dichlorofluorescin diacetate method. Staphylococcus aureus was selected to assess the antibacterial performance of Zr-BMG and mouse osteoblasts were used to examine the in vitro cytotoxicity. The results showed that at a laser energy intensity lower than 0.08 J/mm2 the amorphous structure of Zr-BMG was retained after the irradiation process. Furthermore, the laser irradiation process considerably increased the antibacterial performance of Zr-BMG. The Cu/Ni release rate, reactive oxygen species concentration, and antibacterial properties were directly proportional to the laser energy intensity. However, surfaces with a high antibacterial rate also showed high cytotoxicity. The surface irradiated with 7 μJ ablation pulse and 200 mm/s irradiation speed showed a better balance between antibacterial and cytotoxic properties with amorphous status.

Objective: The present study aims at characterizing the functional status of the central nervous system (CNS) in encoding speech sounds in large-for-gestational-age (LGA) neonates as examined through a sensitive auditory evoked potential termed frequency-following response (FFR). Design: Case-control study. Setting: SJD Barcelona Children’s Hospital (Catalonia, Spain). Population: A sample of 25 LGA neonates were paired by age and sex with 25 born adequate-for-gestational-age (AGA). Methods: Descriptive statistics were calculated for sociodemographic characteristics of the mother and their neonates. Categorical demographic and electrophysiological variables were analyzed by Chi-square test and continuous variables with t test or Mann-Whitney U test. Main Outcome Measures: The primary clinical outcomes were the FFR spectral amplitude and its normalization. Both magnitudes reflect the neural encoding strength of the fundamental frequency of the eliciting stimulus. Results: LGA neonates displayed smaller spectral amplitudes compared to the AGA group (consonant transition: P = .002; vowel: P = .004) as well as smaller normalized spectral amplitudes (consonant transition: P = .01; vowel: P = .003). Conclusions: This study reveals for the first time perinatal CNS consequences of being born LGA, characterized by a deficient neural encoding of speech sounds. Funding: This work was supported by the Spanish Ministry of Science and Universities PGC2018-094765-B-I00 project and the MDM-2017-0729-18-2 Maria de Maeztu Center of Excellence, the 2017SGR-974 Excellence Research Group of the Generalitat de Catalunya, and the ICREA Acadèmia Distinguished Professorship awarded to Carles Escera. Keywords: auditory brainstem response, auditory evoked potentials, BMI, EEG, FFR, macrosomia, newborn, neonatal adiposity, universal hearing screening.

A Schiff base compound 4-(E)-[2-(benzylamino)phenylimino)methyl-2]ethoxy phenol (4BPM2EP) was synthesized and its spectroscopic characterization was performed using experimental methods such as FT-IR, FT-Raman and UV-Vis spectroscopy. Density functional theory (DFT/B3LYP/6-311++G(d,p)) computation were used to investigate the optimized molecular geometry, harmonic vibrational wavenumber, NMR chemical shifts, natural bond orbital (NBO) analysis, non-linear optical (NLO) properties, molecular electroscopic potential (MEP) map, Mulliken atomic charges and thermodynamic properties of 4BPM2EP molecule. TD-DFT calculations have been carried out on the optimized geometry at gaseous phase, DMSO and ethanol to further understand the electronic transitions and solvents effect on the UV-Vis spectra of the compound. The assignments of vibrational modes were performed by means of total energy distribution (TED) using VEDA 4 program and were compared with experimental data. Molecular docking studies were performed using Schrodinger software to establish the information about the interactions between the topoisomerase DNA gyrase enzymes and the novel compound.

Objectives: To calculate an “efficiency index” (EI) based on “numbers needed” metrics (specifically to diagnose and to misdiagnose) for cognitive screening instruments which are commonly used in suspected dementia, and to compare these values with those of a previously described “likelihood to be diagnosed or misdiagnosed” (LDM) metric also based on “numbers needed” metrics. Methods: Datasets from pragmatic test accuracy studies examining four brief cognitive screening instruments (Mini-Mental State Examination, MMSE; Montreal Cognitive Assessment, MoCA; Mini-Addenbrooke’s Cognitive Examination, MACE; Free-Cog) were analysed to calculate values for EI and LDM, and to examine their variation with test cut-off for MACE,. Findings: EI and LDM had similar values for all the screening instruments examined but EI was simpler to calculate than LDM. Both metrics showed similar maxima across a range of cut-offs for MACE. The differing score range of EI and LDM allowed the former, but not the latter, to be qualitatively classified as for likelihood ratios, with three of the tests (MMSE, MACE, Free-Cog) achieving a “moderate” increase in the likelihood of dementia diagnosis. Conclusions: The efficiency index (EI) metric indicates the utility or inutility of diagnostic tests in a way that is easily intelligible for both clinicians and patients, illustrating the inevitable trade-off between diagnosis and misdiagnosis.

Objectives: To evaluate the relationship between clinical features evaluated at admission to the emergency department (ED) and the presence of infection on thoracic and abdominal tomography (CT) scans in patients with acute febrile illness without clinical clues. Methods: Patients aged 18 years and over who presented to ED with acute fever between January 1, 2020 and December 31, 2020 and underwent CT imaging (thoracic and abdomen) as a diagnostic test CT) were included in the study retrospectively. The patients were divided into two groups according to the presence and absence of a source of infection on CT. The clinical and demographic data of the patients were evaluated. The effect of clinical factors on the presence of infection in CT scans was determined using the logistic regression analysis. Results: Among the 173 patients included in the study, the CT scans were positive for the source of infection in 31.2% (n=54) and negative in 68.8% (n=119). In the multiple logistic regression analysis, age ≥ 65 years [odds ratio (OR):2.72, 95% confidence interval (CI):1.15-4.35, p<0.001), presence of comorbidity (OR:2.37, 95% CI:1.08-4.14, p=0.033), and procalcitonin positivity (PCT) (OR:2.54, 95% CI:1.29-4.95, p=0.006) were identified as risk factors for the presence of infection in CT. Conclusion: Age, presence of comorbidity, and PCT level should be considered when deciding on the use of CT in determining the source of infection in acute febrile patients without clinical clues.

The utility of end of treatment bone marrow aspirates (EOTBMA) and cerebral spinal fluid analysis (EOTCSF) in B-cell acute lymphoblastic leukemia (B-ALL) is unclear. A retrospective review, n=50, B-ALL age 1-18 years at diagnosis, having EOTBMA and EOTCSF, at a single institution 2010-2018 was conducted. No bone marrow or CNS relapse was detected by EOTBMA or EOTCSF. 4/50 (8.0%) patients relapsed at a median of 2.5 years (range 0.9-4.5 years). Consensus to abandon routine EOTBMA occurred by presenting results to faculty. Our data supports absence of utility of routine EOTBMAs and EOTCSF in pediatric B-ALL. Disseminating local data facilitated consensus in implementing best practice.

Gemtuzumab Ozagamisin Related Hiccup in a Patient with Relaps Acute Myeloblastic Leukemia

Background: Ivabradine (IVA) inhibits hyperpolarization-activated cyclic nucleotide channel to reduce pacing current with a possible increasing risk of atrial fibrillation (AF). Objective: To determine the effects of IVA on atrial action potentials, atrial arrhythmic activities and intracellular calcium homeostasis. Methods: Langendorff-perfused hearts and atrial myocytes from New Zealand White rabbits were used to record 12-lead ECGs，left atrial monophasic APs and Ca2+ sparks. Ca2+ handing related protein from left atrium were tested using western blotting. Results: IVA (0.1-10 μM) slowed the HR and prolonged the atrial MAPD90 (n=8, p<0.05) and induced atrial arrhythmias in 26% and 77% of hearts paced at cycle lengths of 350 ms and 570 ms, respectively (n=23 and 13, p<0.05). In hearts treated with either 0.3 µM acetylcholine (ACh) or 2 nM ATX-II with modulated atrial MAPDs, IVA (0.1-10 µM) caused either shortening or prolongation of MAPD90, respectively (n=18 and 21, p<0.05) and atrial arrhythmias in 61.9% and 44.4% of hearts (p<0.05). IVA induced delayed afterdepolarizations in 41.7%, 62.5% and 50% of cells in the absence and presence of either ATX-II or ACh, respectively (n=12, 8 and 8, p<0.05). IVA (0.03-3 μM) increased the frequency, amplitude and full width at half-maximum (n=22, p<0.05), and the expression of ryanodine receptor and Na+/Ca2+ exchanger with decreased sarcoplasmic reticulum calcium pump (n=4-5, p<0.05). Conclusion: IVA caused a blunted HR reduction and increased atrial proarrhythmic risk in hearts with slow rate, enhanced vagal tone and late INa, and DADs resulting from enhanced Ca2+ release.

We report a rare case with a history of tetralogy of Fallot with dextrocardia, who presented with palpitation and cardiac arrest upon admission. This unusual complex condition and the atypical symptoms obscured the primary cause of his cardiac arrest and posed challenges on his diagnosis and treatment along with concomitant cardiac arrythmias.

Biotechnology has been an essential tool in the search for solutions and in the optimization of bioprocesses associated with issues of human, plant, animal, energy and also the balance of ecosystems on planet Earth. The objective of this research was to present an unconventional substrate (cellulose), in abundance on the planet, to be used as a substitute source of carbon and energy for biotechnology processes, with the possibility of increasing industrial production of biomass and energy. As basis for the research, an extensive literature review and quantitative and qualitative analyzes were carried out. We chose to qualify the yeast Saccharomyces cerevisiae for partial cellulose degradation, through the use of genetic transformation methods to insert a plasmid carrying the cellobiohydrolase cDNA. It was found that the recombinant and biologically active cellobiohydrolase protein was expressed and excreted in haploid and diploid laboratory yeast strains. The analyzes allowed the visualization of cellulolysis halos around colonies of recombinant strains grown in solid YPD medium with 1% microgranular cellulose. The recombinant clones derived from the haploid lineage yielded in average of 1.70 mg ART/mL, while recombinant clones derived from the diploid lineage produced in average of 2.05 mg ART/mL.

Molecular assays on nasopharyngeal swabs act as the confirmatory test in CoronaVIrus Disease (COVID-19) diagnosis. Despite massive efforts had been made, the high technicalities of nasopharyngeal sampling and molecular assays limit the testing capabilities. Currently, the use of saliva for diagnosis has been recently suggested for COVID-19 diagnostic testing. In a recent research, salivary IgA was associated with the presence of pneumonia, which might illuminate that salivary IgA was independent from serum immunoglobulins. In this study, a total of 44 patients diagnosed with COVID-19 in the Third People’s Hospital of Shenzhen were enrolled. Saliva specimens and serum specimens were obtained at different time points and the immunoglobulins against the SARS-CoV-2 was measured. The results showed that saliva IgA presented higher COI value than IgG and IgM. In matched saliva and serum samples, all saliva presented lower IgG level than serum, and only one saliva sample presented higher IgM level. The conversion rates of saliva IgA and the detection of viral nucleic acid were analyzed in the first and second week after hospitalization. The positive rates were obviously increased when combining the saliva IgA and viral nucleic acid detection. Saliva IgA could serve as useful index for early diagnosis of COVID-19.

Objective: Acute kidney injury (AKI) is a frequent complication of sepsis patients and is associated with high morbidity and mortality. Early recognition of sepsis-associated AKI (SA-AKI) is crucial to provide supportive treatment and improve prognosis. Thus, the objective is to analyze the early discriminative predictive information regarding T lymphocyte subsets of SA-AKI. Methods: We evaluated the relationships of T lymphocyte subsets and clinical parameters of sepsis patients, and assessed their potential roles in SA-AKI diagnosis. The following T lymphocyte subsets were studied: total T lymphocyte (CD3+), helper T lymphocyte (T helper, CD3+CD4+), cytotoxic T lymphocyte (CTL, CD3+CD8+), totally activated T lymphocyte (CD3+HLADR+), early activated T lymphocyte (CD4+CD69+, CD8+CD69+), regulatory T lymphocyte (Treg, CD4+CD25+, CD8+CD25+). Results: A total of 171 patients with sepsis were enrolled. The incidence of AKI was 80.1%. The percentages of total T lymphocyte, CTL, and totally activated T lymphocyte of SA-AKI patients were lower than those in non-SA-AKI patients. There were no significant differences in the percentages of T helper, early activated T lymphocyte, and Tregs between SA-AKI group and non-SA-AKI group. Univariate logistic regression analysis showed percentages of total T lymphocyte, CTL, and totally activated T lymphocyte were protective factors for SA-AKI. Multivariate logistic regression analysis revealed percentage of totally activated T lymphocyte had a negative association with SA-AKI independently. Moreover, ROC analysis showed that total T lymphocyte, CTL, and totally activated T lymphocyte had discriminatory abilities. Conclusions: Impaired total T lymphocyte, CTL, and totally activated T lymphocyte could contribute to early diagnosis for SA-AKI.

Behcet’s Disease (BD) is currently classified as “variable vessel vasculitis” (Chapel Hill, 2012). It is a chronic, multisystemic, inflammatory rheumatic disease. Its main manifestations are mucocutaneous, neurological, cardiovascular, pulmonary and musculoskeletal. Vascular involvement of BD, so-called “angio-Behcet”, appears in 7%-29% of patients. Arterial complications, such as arterial stenoses, pseudoaneurysms, and ruptures occur in a 1-14% range and represent a major cause of morbidity and mortality in BD patients. We, herein, report the case of a large aortic pseudoaneurysm producing severe pulmonary hypertension in a patient with angio-Behcet who had previously undergone aortic root replacement.

Clofarabine (CLO) monotherapy reportedly induces a better clinical response in some patients with refractory Langerhans cell histiocytosis (LCH). We successfully treated two patients with refractory multisystem LCH with CLO monotherapy after recurrence. We administered 23 courses of CLO monotherapy in patient 1 and 4 courses in patient 2. Both patients achieved a durable complete response with acceptable adverse effects of transient myelosuppression. CLO monotherapy is a better therapeutic option for high efficacy and feasibility than other combination chemotherapies or allogeneic hematopoietic stem cell transplantation for refractory LCH.

Aims The treatment with the wearable cardioverter defibrillator (WCD) may protect against sudden cardiac death (SCD) as a bridging therapy until a cardioverter defibrillator may be implanted. Data regarding the impact of WCD on the outcome of patients according gender differences are limited. We analysed a consecutive patient cohort wearing WCD to explore gender differences. Methods and results We analysed 153 consecutive patients of whom were 118 males and 35 females (age, 60±13 vs. 60±16 years old; p=0.88). More males receiving WCD as compared to females suffered from ischemic cardiomyopathy (ICM) (41% vs. 23%; p=0.05), while females were diagnosed with non-ischemic cardiomyopathy (NICM) (60% vs. 42%); p=0.05). The wear time of WCD was equivalent in both groups (21±4 in males vs. 22±3 hours/days in females; p=0.18; and 65±42 in males vs. 65±43 days in females; p=0.96). In both groups, the left ventricular ejection fraction (LVEF) improved in males from 29±10% to 41±12% and in females from 28±12% to 45±13%; p=0.12. At 6-12 month-follow-up, the LVEF increased more in females as compared to males (40% vs. 17%; p=0.003). The rate of rehospitalization due to cardiovascular cause and all-cause-mortality were comparable in both groups at 6-12 month-follow-up (55% in male vs. 54% in female group; p=0.93) (9% in male vs. 11% in female group; p=0.71). Conclusion Compliance for wearing of WCD was excellent regardless of gender. During follow-up, LVEF improved more in females as compared to males. All-cause mortality and the rate of rehospitalization were comparable in both groups.

T-Cell Acute Lymphoblastic Leukemia (T-ALL) is commonly diagnosed in adolescents and is a rare diagnosis in children under 12 months of age. There is little guidance regarding the details of management and outcomes for infantile T-ALL, in particular the use of nelarabine in an infant. Additionally, the genomic landscape of this rare oncologic presentation has not been well documented. We present the unique management, genomics, outcomes, and clinical course of a patient with the diagnosis of infantile T-ALL.

Induction of a Narrow QRS Tachycardia – What is the Mechanism?Sakthivel Ramasamy, Ashish Jain, Raja J SelvarajDepartment of Cardiology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, IndiaWord count: 905Short title: Induction of a narrow QRS tachycardiaDisclosures: None for any of the authorsFunding: (None)Address for Correspondence:Raja J. SelvarajProfessor, Department of CardiologyJIPMERDhanvantri Nagar, PuducherryIndia – 605006email: raja.selvaraj@jipmer.edu.inCase :A young female with recurrent palpitations underwent an electrophysiology study. Delivery of a single ventricular extrastimulus from the right ventricular base repeatedly produced a wide QRS beat (*) and subsequently induced a narrow complex tachycardia (figure 1). What is the mechanism of the wide QRS beat? What is the mechanism of the tachycardia?

Crop plants experience various abiotic stresses that reduce yield and quality. Although several adaptative physiological and defense responses to single stress have been identified, the behavior and mechanisms of plant response to multiple stresses remain underexamined. Herein, we determined that the leaf and vascular changes in CsIVP-RNAi cucumber plants can enhance resistance to nitrogen deficiency and high-temperature stress. CsIVP negatively regulated high nitrate affinity transporters (NRT2.1, NRT2.5) and reallocation transporters (NRT1.7, NRT1.9, NRT1.12) under low nitrogen stress. Furthermore, CsIVP-RNAi plants have high survival rate with low heat injury level under high temperature condition. CsIVP mediated key high-temperature regulators, including HSFs, HSPs, DREB2C, MBF1b, and WRKY33, in response to high temperature. Altogether, these results show that CsIVP integrates innate programming of plant development, nutrient transport, and high-temperature resistance, providing a potentially valuable target for breeding nutrient-efficient and heat-resistant crops. Identification or creation of elite alleles conferring optimal fruit production, nutrient use efficiency, and high-temperature resistance will bring tremendous scientific and economic benefits.

41-year-old male with no significant past medical history presented as an outpatient with atypical chest pain and had positive nuclear stress test. The patient subsequently underwent left heart catheterization, which revealed a fistula between the LAD and LV circumflex artery; however, CTA failed to show any evidence of a fistula.

The current COVID-19 pandemic is affecting public health and economy worldwide. This pandemic has also affected the working and management strategies of clinical practices, healthcare centres, academics, and research centres. The academic and research institutions, students, and research scholars are diverging towards the online platform such as zoom and google meet for teaching, discussing, and sharing knowledge and ideas. Hospitals have also started following the concept of telemedicine for prescribing medicines to patients. In the current situation, on one side the research related to COVID-19 is conducted at an unprecedented rate whereas on the other side the research concerned with other fields including the CNS research is affected adversely. Initially, during the lockdown, the research activities were resumed, and even after the lockdown is withdrawn the situations are no longer better. It is very challenging to carry out the research activities at an adequate pace keeping in view the present pandemic situation.