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This study presents the first report on the kinetic parameters of micro-nano interaction of lithium triborate microparticles doped with zinc oxide nanoparticles (LBZ) in 0.1 to 0.4% dopant concentrations. The parent-dopant mix was synthesized using high-temperature solid-state method. The materials were subjected to X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and differential thermal analysis (DTA) to ascertain their structural, physical properties as well as gamma irradiation and thermoluminescence (TL) analysis for their dosimetric properties. XRD and DTA confirmed the formation of polycrystalline lithium triborate compounds, while SEM and EDS showed the presence of the dopant. TL analysis presented a simple glow curve structure with the main temperature peak for different dopant concentrations varying from 243 to 327°C. The activation energy (E) and frequency factor (s) were calculated for each peak shape parameter τ (low temperature half width), δ (high temperature half-width) and ω (total half width) using Chen's peak shape (PS) method and the order of kinetics was deduced from the symmetry factor (μg) and gamma dose-response curves. The activation energy and frequency factor with respect to the peak shape parameters Eτ, Eδ, Eω and sτ, sδ, sω across the dopant concentrations were in the range of 1.14 to 2.2 eV and 3.92 × 1010 to 7.71 × 1022 s-1, respectively. Comparing the methods for the determination of the order of kinetics, LBZ 0.2% agrees with the conditions of first-order kinetics, while second-order kinetics is assigned to LBZ 0.1, 0.3 and 0.4%. The results present simple glow curve structure which relates to stability, high-temperature peaks and E values which correspond to deep trap states.Translational recoding, also known as ribosomal frameshifting, is a process that causes ribosome slippage along the messenger RNA, thereby changing the amino acid sequence of the synthesized protein. Whether the chloroplast employs recoding is unknown. Doramapimod clinical trial I-iota, a plastome mutant of Oenothera (evening primrose), carries a single adenine insertion in an oligoA stretch [11A] of the atpB coding region (encoding a β-subunit of the ATP synthase). The mutation is expected to cause synthesis of a truncated, non-functional protein. We report that a full-length AtpB protein is detectable in I-iota leaves, suggesting operation of a recoding mechanism. To characterize the phenomenon, we generated transplastomic tobacco lines in which the atpB reading frame was altered by insertions or deletions in the oligoA motif. We observed that insertion of two adenines was more efficiently corrected than insertion of a single adenine, or deletion of one or two adenines. We further show that homopolymeric composition of the oligoA stretch is essential for recoding, as an additional replacement of AAA lysine codon by AAG resulted in an albino phenotype. Our work provides evidence for the operation of translational recoding in chloroplasts. Recoding enables correction of frameshift mutations and can restore photoautotrophic growth in the presence of mutation that otherwise would be lethal.International collaboration on research on neglected tropical diseases (NTDs) is regarded as a norm, but it was not always so. This article is an account of a growing international collaboration on the diagnosis and treatment of mycetoma that started in Sudan in the 1960s and has grown and flourished up to the present day.
The purpose of this study was to systematically review the association between handgrip strength (HGS) and mortality, morbidity, and health-related quality of life (HRQL) in individuals with chronic obstructive pulmonary disease (COPD).
The following databases were used CENTRAL, CINAHL, EMBASE, MEDLINE Ovid, SPORTDiscus, and PsycINFO. Studies published between 2000 and 2020 in English, Portuguese, or French that examined the association of HGS with mortality, morbidity and HRQL in individuals with stable COPD. Two authors independently extracted data and assessed the quality of evidence using the GRADE framework. The studies effects were pooled using random effects meta-analysis models after assessing heterogeneity. The search generated 710 studies and 18 were included in the review. Studies evaluated a total of 12,046 individuals with stable COPD (mean percent of the predicted forced expiratory volume in one second=34-80) using over 10 diverse protocols for HGS measurement. Statistically significant, smaurement protocols, small to moderate associations were found, indicating that those with lower HGS have increased likelihood of death, a higher risk of increased COPD morbidity (as assessed with BODE indexes), and poorer HRQL.
Although heterogeneity was present among HGS measurement protocols, small to moderate associations were found, indicating that those with lower HGS have increased likelihood of death, a higher risk of increased COPD morbidity (as assessed with BODE indexes), and poorer HRQL.
High-dose vitamin A (VA) supplements (VAS) can temporarily affect VA status. Hence, micronutrient surveys might need to be timed around VAS campaigns to accurately estimate VA deficiency (VAD) prevalence. Little is known about optimal timing of micronutrient surveys when the modified-relative-dose-response (MRDR) is used as a VA indicator.
We evaluated the association between days since the end of a VAS campaign and MRDR values in children aged 12-23 mo in Uganda.
We pooled data from 2 cross-sectional, population-based surveys in eastern Uganda conducted in 2015-2016 (n=118 children). We estimated the prevalence of VAD (MRDR≥0.060). Days since the end of a VAS campaign ("days since VAS") was calculated as the interview date minus the end date of the VAS campaign. The MRDR value was assessed using HPLC. We excluded children whose MRDR values were below the limit of detection (<0.007). We used linear regression to evaluate the association between days since VAS and log-transformed MRDR. In adjusted anaged 12-23 mo. Future studies should consider longitudinal designs and evaluate time since VAS and MRDR in children of different ages and in regions with higher VAD prevalence.
We evaluated the efficacy and safety of first-line S-1 plus cisplatin in combination with cetuximab for Japanese patients with advanced gastric cancer, including gastroesophageal junction adenocarcinoma.
This open-label, single arm, multicenter, phase 2 trial was conducted to assess first-line cetuximab plus S-1 plus cisplatin for advanced gastric cancer. A total of 40 patients from 10 centers were enrolled. Cetuximab was administered weekly, with the initial infusion at 400mg/m2 and then 250mg/m2 each subsequent week. S-1 plus cisplatin chemotherapy was concomitantly conducted in a 5-weekcycle S-1 (40-60mg, adjusted for body surface area) was given twice daily for 3 consecutive weeks, followed by a 2-week rest period, and cisplatin (60mg/m2) was given on day 8 of each cycle for a maximum of 8cycles. Treatment continued until the occurrence of radiographically confirmed progressive disease, unacceptable toxicity or withdrawal of consent. The primary endpoint was the best overall response. Secondary endpoints included progression-free survival and safety.
A total of 40 patients were evaluable. One patient (2.5%) had a complete response; 15 patients (37.5%) had a partial response. The observed overall response rate according to the independent review committee was 40.0% (95% confidence interval, 24.9-56.7; P=0.7043 [one-sided null hypothesis overall response rate≤43%]); median PFS was 5.6months (95% confidence intervals, 4.2-8.3). No adverse events leading to death were reported during the study, and no specific safety concerns were observed.
Overall, the addition of cetuximab to S-1 plus cisplatin was well tolerated in patients with advanced gastric cancer but provided no additional clinical benefit in this study. ClinicalTrials.gov identifier NCT01388790.
Overall, the addition of cetuximab to S-1 plus cisplatin was well tolerated in patients with advanced gastric cancer but provided no additional clinical benefit in this study. ClinicalTrials.gov identifier NCT01388790.HEAT SHOCK PROTEINs (HSPs) are stress-responsive proteins that are conserved across all organisms. HEAT SHOCK PROTEIN101 (HSP101) has an important role in thermotolerance owing to its chaperone activity. However, if and how it functions in development under nonstress conditions is not yet known. By using physiological, molecular and genetic methods, we investigated the role of HSP101 in the control of flowering in Arabidopsis (Arabidopsis thaliana (L.) Heynh.) under nonstress conditions. Knockout and overexpression of HSP101 cause late and early flowering, respectively. Late flowering can be restored by rescue of HSP101. HSP101 regulates the expression of genes involved in the six known flowering pathways; the most negatively regulated genes are FLOWERING LOCUS C (FLC) and SHORT VEGETATIVE PHASE (SVP); downstream integrators of the flowering pathways are positively regulated. The late flowering phenotype of loss-of-HSP101 mutants is suppressed by both the mutations of FLC and SVP. The responses of flowering time to exogenous signals do not change in HSP101 mutants. HSP101 is also found in nonspecific regions according to subcellular localization. We found that HSP101 promotes flowering under nonstress conditions and that this promotion depends on FLC and SVP. Our data suggest that this promotion could occur through a multiple gene regulation mechanism.
The intrauterine environment may influence offspring blood pressure, with effects possibly extending into adulthood. The associations between prenatal nutrition and offspring blood pressure, alone or in combination with other sociodemographic or behavioral factors, are unclear.
To investigate the associations of maternal dietary patterns and plasma folate concentrations with blood pressure in children aged 4-6 years, and assess the potential effect modifications by child sex, maternal race, pre-pregnancy overweight or obesity, maternal smoking, and breastfeeding.
Participants were 846 mother-child dyads from the Conditions Affecting Neurocognitive Development and Learning in Early Childhood (CANDLE) study. Maternal nutrition was characterized by the Healthy Eating Index 2010 (HEI) scores and plasma folate concentrations in pregnancy. We calculated the systolic blood pressure (SBP) and diastolic blood pressure percentiles, incorporating sex, age, and height, and categorized children as either having highal smoking, or breastfeeding were indicated.
We found little evidence for effects of maternal nutrition during pregnancy on childhood blood pressure, but detected sex- and race-specific associations. The study contributes to the evolving scientific inquiry regarding developmental origins of disease.
We found little evidence for effects of maternal nutrition during pregnancy on childhood blood pressure, but detected sex- and race-specific associations. The study contributes to the evolving scientific inquiry regarding developmental origins of disease.
Low-intensity pulsed ultrasound (LIPUS) has been proven to facilitate bone-tendon interface (BTI) healing and regulate some inflammatory cytokines. However, the role of macrophages, a key type of inflammatory cell, during treatment remains unknown. This study aimed to investigate the role of macrophages in the treatment of BTI injury with LIPUS in a rotator cuff tear animal model.
In this experimental and comparative study, a total of 160 C57BL/6 mature male mice that underwent supraspinatus tendon detachment and repair were randomly assigned to 4 groups daily ultrasonic treatment and liposomal clodronate (LIPUS+LC), daily ultrasonic treatment and liposomes (LIPUS), daily mock sonication and liposomal clodronate (LC), and daily mock sonication and liposomes (control). LIPUS treatment was initiated immediately postoperatively and continued daily until the end of the experimental period.
The failure load and stiffness of the supraspinatus tendon-humerus junction were significantly higher in the LIPUS group than in the other groups at postoperative weeks 2 and 4, whereas those in the LIPUS+LC and LC groups were lower than those in the control group at postoperative week 4.
My Website: https://www.selleckchem.com/products/BIRB-796-(Doramapimod).html
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