Johnswiley6224
The design and synthesis of heparin mimetics with high anticancer activity but no anticoagulant activity is an important task in medicinal chemistry. Herein, we present the efficient synthesis of five Glc-GlcA-Glc-sequenced and one Glc-IdoA-Glc-sequenced non-glycosaminoglycan, heparin-related trisaccharides with various sulfation/sulfonylation and methylation patterns. The cell growth inhibitory effects of the compounds were tested against four cancerous human cell lines and two non-cancerous cell lines. Two d-glucuronate-containing tetra-O-sulfated, partially methylated trisaccharides displayed remarkable and selective inhibitory effects on the growth of ovary carcinoma (A2780) and melanoma (WM35) cells. Methyl substituents on the glucuronide unit proved to be detrimental, whereas acetyl substituents were beneficial to the cytostatic activity of the sulfated derivatives.The online environment poses a number of challenges, including creating opportunities for students to interact and get to know each other. I propose adding online discussions that can allow students to explore the real-world implications of biochemistry to provide course context, build the classroom community, diversify student assessment, and practice communication and information literacy skills. Utilizing current events and elements of students' daily lives can help students interconnect what they are learning and increase student interest in the course. These discussions ask students to explore a topic, reflect on what they would like to learn, find information, and report back on what they have learned. Herein I provide an example of a discussion prompt, a table of other potential discussion topics that are aligned with common biochemistry course topics, and results from student survey supporting discussion format.
Neuromuscular diseases are rare conditions that present with progressive muscular weakness. As affected children transition into adulthood, they become more physically dependent on their families for support. There is little evidence on the family transition experience, which this study explored to identify experiences, challenges, and strategies of coping.
Informed by family systems theory, a constructivist grounded theory study was conducted (2014-2017).
Data were collected by one-on-one interviews with a purposive sample of affected Swiss individuals and their families from 2015 to 2016. Data analysis used coding, memo writing, theoretical sampling, and constant comparison techniques.
The analysis of 31 interviews with 10 affected individuals and 21 family members resulted in an interpretive theory constituted of four categories (a) living with physical dependence, while striving for independence; (b) balancing proximity; (c) conforming and challenging social standards and expectations; and (d) grieving for loss, while joining forces for life.
Family functioning and well-being were threatened by recurring tension from stress, physical and emotional difficulties, strained relationships, and conflict. The families' strategies of coping and adaptation and their relationships and communication shaped their transition experience.
Families that experience threats to their well-being and functioning would benefit from needs assessment and monitoring; planning of appropriate family interventions; support of family relationships and communication, effective coping, and mastery; and positive adaptation to change.
Families that experience threats to their well-being and functioning would benefit from needs assessment and monitoring; planning of appropriate family interventions; support of family relationships and communication, effective coping, and mastery; and positive adaptation to change.
To assess the effects of mindfulness-based interventions for patients with coronary heart disease.
A systematic review with meta-analysis.
Eight mainstream databases, including Ovid MEDLINE, Embase, Ovid Emcare, PsycInfo, CINAHL complete, Web of Science, CENTRAL and PubMed, were searched from January 1979-March 2020.
Randomized controlled trials that evaluated mindfulness-based interventions on psychological outcomes, cardiovascular risk factors and quality of life in adults with coronary heart disease were considered. We conducted meta-analyses using the random-effects model.
Nine studies involving 644 participants were included. Compared with inactive controls (e.g. usual care), mindfulness-based interventions significantly reduced depression (SMD -0.72, 95% CI -1.23 to -0.21, p<.01) and stress (SMD -0.67, 95% CI -1.00 to -0.34, p<.01), but not anxiety and blood pressure. There were no significant psychological effects compared with active controls (e.g. other psychological interventions). Itudies exploring the intervention effects on cardiovascular risk factors and quality of life are warranted to remedy the research and knowledge gap.
This review offers preliminary evidence for the potential of mindfulness-based interventions as an effective complementary approach to addressing psychological distress among people with coronary heart disease. https://www.selleckchem.com/ Given the limitations in current studies, further rigorously designed and well-reported research is necessary to give robust evidence. Studies exploring the intervention effects on cardiovascular risk factors and quality of life are warranted to remedy the research and knowledge gap.The development of new fluorine-containing building blocks and their efficient synthetic access is currently a challenging research field. Herein, the highly regio- and stereoselective addition of a large range of aldehydes onto trifluoromethylated benzofulvenes was achieved using a simple La/I2 /DIBAL-Cl system via a selective C-F bond activation process. This versatile methodology provided homodienyl alcohols bearing a terminal CF2 -alkene with potential further applications, as shown by the dehydration to the first benzofulvenes carrying a difluorovinyl group. In addition, for certain electron-poor aldehydes, unprecedented ipso substitution of the CF3 group in a diene was observed, which, according to DFT studies, is related to the presence of the large, Lewis-acidic lanthanum metal.We propose a new concept of the triple role of protic ionic liquids with nucleophilic anions a) a regenerable solvent, b) a Brønsted acid inducing diverse transformations via general acid catalysis, and c) a source of a nucleophile. The efficiency of this strategy was demonstrated using thiocyanate-based protic ionic liquids for the ring-opening of donor-acceptor cyclopropanes. A wide variety of activated cyclopropanes were found to react with 1-methylimidazolium thiocyanate under mild metal-free conditions via unusual nitrogen attack of the ambident thiocyanate ion on the electrophilic center of the three-membered ring affording pyrrolidine-2-thiones bearing donor and acceptor substituents at the C(5) and C(3) atoms, respectively, in a single time-efficient step. The ability of 1-methylimidazolium thiocyanate to serve as a triplex reagent was exemplarily illustrated by (4+2)-annulation with 1-acyl-2-(2-hydroxyphenyl)cyclopropane, epoxide ring-opening and other organic transformations.
New noninvasive and affordable molecular approaches that will complement current practices and increase the accuracy of Parkinson's disease (PD) diagnosis are urgently needed. Circular RNAs (circRNAs) are stable noncoding RNAs that accumulate with aging in neurons and are increasingly shown to regulate all aspects of neuronal development and function.
Τhe aims of this study were to identify differentially expressed circRNAs in blood mononuclear cells of patients with idiopathic PD and explore the competing endogenous RNA networks affected.
Eighty-seven circRNAs were initially selected based on relatively high gene expression in the human brain. More than half of these were readily detectable in blood mononuclear cells using real-time reverse transcription-polymerase chain reaction. Comparative expression analysis was then performed in blood mononuclear cells from 60 control subjects and 60 idiopathic subjects with PD.
Six circRNAs were significantly down-regulated in patients with PD. The classifier t they are highly expressed in the brain and are derived from genes with essential brain functions, they may also hint on the PD pathways affected. © 2021 Biomedical Research Foundation, Academy of Athens. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
PReferentially expressed Antigen in MElanoma (PRAME) immunohistochemical (IHC) staining is used to aid melanoma diagnosis. PRAME expression in nevus-associated melanoma (NAM) has not been evaluated.
PRAME IHC was applied to cases of NAM; staining for each population of melanocytes (benign and malignant) was graded based on the percentage of labeled cells. No labeling was graded 0, 1% to 25% labeling was 1+, 26% to 50% was 2+, 51% to 75% was 3+, and >76% was 4+.
Thirty-six cases were reviewed. Sixty-seven percent (24/36) of melanomas were PRAME positive (4+) while no (0/36) nevi showed 4+ positivity. Eighty-one percent (29/36) of nevi were completely PRAME negative compared to 17% (6/36) of melanomas. In 67% of cases (24/36) PRAME differentiated between benign and malignant melanocyte populations.
We identified a high rate (67%) of differential PRAME staining in adjacent benign and malignant melanocyte populations in NAM. In PRAME positive (4+) melanomas, PRAME differentiates 100% (24/24) of benign and malignant melanocyte populations. When 4+ staining is used as the threshold for positivity, PRAME staining has a sensitivity of 67% (24/36) and a specificity of 100% (36/36). These results support PRAME IHC can assist in distinguishing melanocyte populations in melanoma arising within nevi.
We identified a high rate (67%) of differential PRAME staining in adjacent benign and malignant melanocyte populations in NAM. In PRAME positive (4+) melanomas, PRAME differentiates 100% (24/24) of benign and malignant melanocyte populations. When 4+ staining is used as the threshold for positivity, PRAME staining has a sensitivity of 67% (24/36) and a specificity of 100% (36/36). These results support PRAME IHC can assist in distinguishing melanocyte populations in melanoma arising within nevi.Triptycenes have been established as unique scaffolds because of their backbone π-structure with a propeller-like shape and saddle-like cavities. They are some of the key organic molecules that have been extensively studied in polymer chemistry, in supramolecular chemistry and in material science. Triptycenes become chiral molecules when substituents are unsymmetrically attached in at least two of their different aromatic rings. This Minireview highlights the chirality of triptycenes from basics to an advanced stage for the development of functional molecules.
Clinical scales such as the Scale for the Assessment and Rating of Ataxia (SARA) cannot be used to study ataxia at home or to assess daily fluctuations. The objective of the current study was to develop a video-based instrument, SARA
, for measuring ataxia severity easily and independently at home.
Based on feasibility of self-application, we selected 5 SARA items (gait, stance, speech, nose-finger test, fast alternating hand movements) for SARA
(range, 0-28). We compared SARA
items with total SARA scores in 526 patients with spinocerebellar ataxia types 1, 2, 3, and 6 from the EUROSCA natural history study. To prospectively validate the SARA
, we directly compared the self-applied SARA
and the conventional SARA in 50 ataxia patients. To demonstrate feasibility of independent home recordings in a pilot study, 12 ataxia patients were instructed to obtain a video each morning and evening over a period of 14 days. All videos were rated offline by a trained rater.
SARA
extracted from the EUROSCA baseline data was highly correlated with conventional SARA (r= 0.
