keyword
MENU ▼
Read by QxMD icon Read
search

transitions

keyword
https://www.readbyqxmd.com/read/29793153/effects-of-mg-2-on-recovery-of-nmda-receptors-from-inhibition-by-memantine-and-ketamine-reveal-properties-of-a-second-site
#1
Nathan G Glasgow, Madeleine R Wilcox, Jon W Johnson
Memantine and ketamine are NMDA receptor (NMDAR) open channel blockers that are thought to act via similar mechanisms at NMDARs, but exhibit divergent clinical effects. Both drugs act by entering open NMDARs and binding at a site deep within the ion channel (the deep site) at which the endogenous NMDAR channel blocker Mg2+ also binds. Under physiological conditions, Mg2+ increases the IC50 s of memantine and ketamine through competition for binding at the deep site. Memantine also can inhibit NMDARs after associating with a second site accessible in the absence of agonist, a process termed second site inhibition (SSI) that is not observed with ketamine...
May 12, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29793100/the-still-uncertain-identity-of-the-channel-forming-unit-s-of-the-mitochondrial-permeability-transition-pore
#2
REVIEW
Christopher P Baines, Manuel Gutiérrez-Aguilar
Mitochondria from different organisms can undergo a sudden process of inner membrane unselective leakiness to molecules known as the mitochondrial permeability transition (MPT). This process has been studied for nearly four decades and several proteins have been claimed to constitute, or at least regulate the usually inactive pore responsible for this transition. However, no protein candidate proposed as the actual pore-forming unit has passed rigorous gain- or loss-of-function genetic tests. Here we review evidence for -and against- putative channel-forming components of the MPT pore...
May 16, 2018: Cell Calcium
https://www.readbyqxmd.com/read/29793031/cloning-overexpression-and-purification-of-a-gene-of-unknown-function-of-prophage-loci-from-candidatus-liberibacter-asiaticus-the-destructive-bacterial-pathogen-of-huanglongbing-disease-in-citrus-plants
#3
Duangtip Sudhan, Thamrongjet Puttamuk, Supachai Vuttipongchaikij, Pitak Chuawong
Citrus Huanglongbing (HLB) or citrus greening is one of the most destructive diseases affecting citrus industry worldwide. The causal agent in Asia is a phloem-limited, Gram-negative bacterium, 'Candidatus Liberibacter asiaticus' (CLas). Within the genome of CLas lies prophage regions, classified as Type-A, B, C, and D. In particular, Type-D has been indicated to correlate with the blotchy-mottle symptoms of citrus trees. Here we reported the cloning, overexpression, and purification of the ORF1, an open reading frame from the partial Type-D region of CLas obtained from an infected lime tree (Citrus aurantifolia Swingle)...
May 21, 2018: Protein Expression and Purification
https://www.readbyqxmd.com/read/29793007/minimum-clinically-important-differences-in-chronic-pain-vary-considerable-by-baseline-pain-and-methodological-factors-systematic-review-of-empirical-studies
#4
REVIEW
Mette Frahm Olsen, Eik Bjerre, Maria Damkjær Hansen, Britta Tendal, Jørgen Hilden, Asbjørn Hróbjartsson
BACKGROUND: The minimum clinically important difference (MCID) is used to interpret the relevance of treatment effects, e.g. when developing clinical guidelines, evaluating trial results or planning sample sizes. There is currently no agreement on an appropriate MCID in chronic pain and little is known about which contextual factors cause variation. METHODS: Systematic review. We searched PubMed, EMBASE and Cochrane Library. Eligible studies determined MCID for chronic pain based on a one-dimensional pain scale, a patient-reported transition scale of perceived improvement; and either a mean change analysis (mean difference in pain among minimally improved patients) or a threshold analysis (pain reduction associated with best sensitivity and specificity for identifying minimally improved patients)...
May 21, 2018: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/29792880/molecular-alterations-during-larval-development-of-haemonchus-contortus-in-vitro-are-under-tight-post-transcriptional-control
#5
Guangxu Ma, Tao Wang, Pasi K Korhonen, Ching-Seng Ang, Nicholas A Williamson, Neil D Young, Andreas J Stroehlein, Ross S Hall, Anson V Koehler, Andreas Hofmann, Robin B Gasser
In this study, we explored the molecular alterations in the developmental switch from the L3 to the exsheathed L3 (×L3) and to the L4 stage of Haemonchus contortus in vitro using an integrated transcriptomic, proteomic and bioinformatic approach. Totals of 9,754 mRNAs, 88 microRNAs (miRNAs) and 1,591 proteins were identified, and 6,686 miRNA-mRNA pairs inferred in all larval stages studied. Approximately 16% of transcripts in the combined transcriptome (representing all three larval stages) were expressed as proteins, and there were positive correlations (r = 0...
May 22, 2018: International Journal for Parasitology
https://www.readbyqxmd.com/read/29792862/the-reason-for-the-low-ca-2-sensitivity-of-thin-filaments-associated-with-the-glu41lys-mutation-in-the-tpm2-gene-is-freezing-of-tropomyosin-near-the-outer-domain-of-actin-and-inhibition-of-actin-monomer-switching-off-during-the-atpase-cycle
#6
Stanislava V Avrova, Olga E Karpicheva, Nikita A Rysev, Armen O Simonyan, Vladimir V Sirenko, Charles S Redwood, Yurii S Borovikov
The E41K mutation in TPM2 gene encoding muscle regulatory protein beta-tropomyosin is associated with nemaline myopathy and cap disease. The mutation results in a reduced Ca2+ -sensitivity of the thin filaments and in muscle weakness. To elucidate the structural basis of the reduced Ca2+ -sensitivity of the thin filaments, we studied multistep changes in spatial arrangement of tropomyosin (Tpm), actin and myosin heads during the ATPase cycle in reconstituted fibers, using the polarized fluorescence microscopy...
May 21, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29792859/long-non-coding-rna-miat-is-estrogen-responsive-and-promotes-estrogen-induced-proliferation-in-er-positive-breast-cancer-cells
#7
Yuehua Li, Baohong Jiang, Xiaoping Wu, Qin Huang, Wenqi Chen, Hongbo Zhu, Xiaofei Qu, Liming Xie, Xin Ma, Guo Huang
Estrogen drives the development and progression of estrogen receptor (ER)-positive breast cancer. However, the detailed mechanism underlying ER-driven carcinogenesis remains unclear despite extensive studies. Previously reports indicated higher expression of long non-coding RNA (lncRNA) myocardial infarction associated transcript (MIAT) in ER-positive breast cancer tissues than in ER-negative tissues. However, the functional relevance of MIAT in ER-positive breast cancer tumorigenesis was poorly understood...
May 21, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29792733/feasibility-and-acceptability-of-nurse-led-primary-palliative-care-for-older-adults-with-chronic-conditions-a-pilot-study
#8
Shigeko Seiko Izumi, Basilia Basin, Margo Presley, Jean McCalmont, Jon P Furuno, Brie Noble, Judith G Baggs, J Randall Curtis
BACKGROUND: Many older adults live with serious illness for years before their death. Nurse-led primary palliative care could improve their quality of life and ability to stay in their community. OBJECTIVES: To assess feasibility and acceptability of a nurse-led Transitional Palliative Care (TPC) program for older adults with serious illness. METHODS: The study was a pilot trial of the TPC program in which registered nurses assisted patients with symptom management, communication with care providers, and advance care planning...
May 24, 2018: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/29792704/double-hydrogen-atom-exchange-reactions-of-hx-x-f-cl-br-i-with-ho2
#9
Rex T Skodje, Jonathan R Church
A novel double hydrogen atom exchange process, HX+H'O2H'X+HO2 for the halogen series X=F, Cl, Br, and I, is identified using theoretical methods. These concerted reactions are mediated through a stabilized five-member planar ring transition state structure. The transition state barrier for the double exchange process is found to be significantly lower than that for the abstraction reaction of a single hydrogen atom, . Density functional theory employing the M11 exchange functional is used to compute parameters of the potential energy surface and the rate coefficients are obtained using transition state theory with small curvature tunneling...
May 24, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29792676/dramatic-increase-in-polymer-glass-transition-temperature-under-extreme-nanoconfinement-in-weakly-interacting-nanoparticle-films
#10
Haonan Wang, Jyo Lyn Hor, Yue Zhang, Tianyi Liu, Daeyeon Lee, Zahra Fakhraai
Properties of polymers in polymer nanocomposites and nanopores have been shown to deviate from their respective bulk properties due to chain confinement as well as polymer-particle interfacial interactions. However, separating the confinement effects from the interfacial effects under extreme nanoconfinement is experimentally challenging. Capillary Rise Infiltration (CaRI) enables polymer infiltration into nanoparticle (NP) packings, thereby confining polymers within extremely small pores and dramatically increasing the interfacial area, providing a unique system to systematically distinguish the role of each effect on polymer properties...
May 24, 2018: ACS Nano
https://www.readbyqxmd.com/read/29792675/electron-phonon-coupling-and-resonant-relaxation-from-1d-and-1p-states-in-pbs-quantum-dots
#11
Eric R Kennehan, Grayson S Doucette, Ashley R Marshall, Christopher Grieco, Kyle T Munson, Matthew C Beard, John B Asbury
Observations of the hot-phonon bottleneck, which is predicted to slow the rate of hot carrier cooling in quantum confined nanocrystals, have been limited to date for reasons that are not fully understood. We used time-resolved infrared spectroscopy to directly measure higher energy intraband transitions in PbS colloidal quantum dots. Direct measurements of these intraband states permitted detailed analysis of the electronic overlap of the quantum confined states that may influence their relaxation processes...
May 24, 2018: ACS Nano
https://www.readbyqxmd.com/read/29792543/restructuring-saudi-board-in-restorative-dentistry-sbrd-curriculum-using-canmeds-competency
#12
Bahiah Abdulaziz Al Askar, Fahad Saleh Al Sweleh, Ebtesam Ibrahim Al Wasill, Zubair Amin
OBJECTIVE: The purpose of this paper is to describe the process of adopting the Canadian Medical Education Directions for Specialists (CanMEDS) 2015 competency framework in a dental specialty program to reconstruct the Saudi Board in Restorative Dentistry (SBRD) curriculum and disseminate the lessons learned. Method and development process: The process of curriculum development was started with the selection of SBRD curriculum committee and review of CanMEDS framework. The Committee conducted needs assessment among the stakeholders and adopted CanMEDS 2015 competencies through a careful process...
May 24, 2018: Medical Teacher
https://www.readbyqxmd.com/read/29792476/a-mixed-methods-investigation-into-the-perspectives-on-mental-health-and-professional-treatment-among-former-system-youth-with-mood-disorders
#13
Michelle R Munson, Sarah Carter Narendorf, Shelly Ben-David, Andrea Cole
Research has shown that how people think about their health (or illnesses) shapes their help-seeking behavior. In this mixed-methods study, we employed a simultaneous concurrent design to explore the perceptions of mental illness among an understudied population: marginalized young adults. Participants were 60 young adults (ages 18-25) who had experienced mood disorders and used multiple public systems of care during their childhoods. Semistructured interviews were conducted to understand participants' illness and treatment experiences during the transition to adulthood...
May 24, 2018: American Journal of Orthopsychiatry
https://www.readbyqxmd.com/read/29792434/synthesis-of-densely-substituted-conjugated-dienes-by-transition-metal-free-reductive-coupling-of-allenylboronic-acids-and-tosylhydrazones
#14
Dong Wang, Martin J M de Wit, Kalman J Szabo
Tosylhydrazones and allenylboronic acids underwent a transition metal free reductive coupling reaction. This process is suitable for synthesis of tetra- and pentasubstituted conjugated dienes. The corresponding allenyl-Bpin substrate showed a very poor reactivity. The reaction is suggested to involve coupling of the in situ formed diazo compound and allenylboronic acid. The intermediate formed in this coupling undergoes allenyl migration followed by protodeboronation to furnish a conjugated diene as major product...
May 24, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29792431/the-o-no-v-vibrational-relaxation-processes-revisited
#15
Pedro J S B Caridade, Jing Li, Vinícius C Mota, António J C Varandas
We have carried out a quasi-classical trajectory study of the $\mathrm{O}+\mathrm{NO}(v)$ energy transfer process using DMBE potential energy surfaces for the ground-states of the $^2A'$ and $^2A''$ manifolds. State-to-state vibrational relaxation rate constants have been computed over the temperature range $298\rm \,K$ and $3000\,\rm K$ and initial vibrational states between $v=1$ and 9. The momentum-Gaussian binning approach has been employed to calculate the probability of the vibrational transitions. A comparison of the calculated state-to-state rate coefficients with the results from experimental studies and previous theoretical calculations shows the relevance of the $1\,^2A''$ potential energy surface to the title vibrational relaxation process...
May 24, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29792422/toward-total-synthesis-of-thiolate-protected-metal-nanoclusters
#16
Qiaofeng Yao, Tiankai Chen, Xun Yuan, Jianping Xie
Total synthesis, where desired organic- and/or biomolecules could be produced from simple precursors at atomic precision and with known step-by-step reactions, has prompted centuries-lasting bloom of organic chemistry since its conceptualization in 1828 (Wöhler synthesis of urea). Such expressive science is also highly desirable in nanoscience, since it represents a decisive step toward atom-by-atom customization of nanomaterials for basic and applied research. Although total synthesis chemistry is less established in nanoscience, recent years have witnessed seminal advances and increasing research efforts devoted into this field...
May 24, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29792381/a-photo-switchable-and-thermal-enhanced-fluorescent-hydrogel-prepared-from-n-isopropylacrylamide-with-water-soluble-spiropyran-derivative
#17
Xueqing Zou, Xiaozhen Xiao, Shixiong Zhang, Jiajun Zhong, Yulin Hou, Liqiong Liao
Herein, a photo-switchable and thermal-enhanced fluorescent hydrogel has been fabricated from N-isopropylacrylamide (NIPAAm) with a mixture of water-soluble acryloyl-α-cyclodextrin/acryloyl-α-cyclodextrin-spiropyran (acryloyl-α-CD/ acryloyl-α-CD-SP) as cross-linkers. The physical properties, photochromic properties, and fluorescent behavior of the hydrogel were characterized. The fluorescence emission of the hydrogel can be reversibly switched "on/off" by UV/visible light irradiation, and meanwhile the fluorescence intensity can be enhanced by increasing the temperature above the volume phase transition temperature (VPTT) of the hydrogel...
May 24, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29792270/-biomarking-the-transition-from-genetic-risk-to-kidney-disease
#18
Etty Kruzel-Davila, Karl Skorecki
Only some individuals carrying the high-risk APOL1 genotype go on to develop kidney disease phenotypes. In this issue of Kidney International, Nadkarni and colleagues report the associations of several biomarkers with renal outcomes in individuals with high-risk APOL1 genotypes. In the era of precision medicine, these findings should translate into improved longitudinal risk assessment for this high-risk population and might also provide additional insights regarding sites and mechanisms of APOL1 nephropathy...
June 2018: Kidney International
https://www.readbyqxmd.com/read/29792260/widening-participation-of-m%C3%A4-ori-and-pasifika-students-in-health-careers-evaluation-of-two-health-science-academies
#19
Lesley Middleton, Ausaga Faasalele Tanuvasa, Megan Pledger, Nicola Grace, Kirsten Smiler, Tua Taueetia Loto-Su'a, Jacqueline Cumming
Objective The aim of the present study was to evaluate the short-term outcomes of two health science academies established by a district health board in South Auckland, New Zealand, to create a health workforce pipeline for local Māori and Pasifika students. Methods A mixed-methods approach was used, involving background discussions with key informants to generate an initial logic model of how the academies work, followed by secondary analysis of students' records relating to retention and academic achievement, a survey of senior academy students' interest in particular health careers and face-to-face interviews and focus groups with students, families and teachers...
May 24, 2018: Australian Health Review: a Publication of the Australian Hospital Association
https://www.readbyqxmd.com/read/29792129/exploring-intimate-partner-violence-before-during-and-after-pregnancy-in-bangladesh
#20
Md Jahirul Islam, Lisa Broidy, Paul Mazerolle, Kathleen Baird, Nurunnahar Mazumder
Intimate partner violence (IPV) against pregnant or postpartum women is known to have multiple detrimental effects on women and their children. Although results from past research suggest much continuity in trajectories of IPV, it is unclear whether pregnancy interrupts or augments these patterns. Little is known about how physical, sexual, and psychological IPV change and overlap throughout a woman's transition to parenthood. Relying on population-based data, this study examines the prevalence, co-occurring nature, and the changing patterns of physical, sexual, and psychological IPV before, during, and after pregnancy in Bangladesh...
May 1, 2018: Journal of Interpersonal Violence
keyword
keyword
2258
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"