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https://www.readbyqxmd.com/read/28723223/free-energy-of-binding-and-mechanism-of-interaction-for-the-meevd-tpr2a-peptide-protein-complex
#1
Mauro Lapelosa
The association between the MEEVD C-terminal peptide from the heat shock protein 90 (Hsp90) and tetratricopeptide repeat A (TPR2A) domain of the heat shock organizing protein (Hop) is a useful prototype to study the fundamental molecular details about the Hop-Hsp90 interaction. We study here the mechanism of binding/unbinding, and compute the standard binding free energy and potential of mean force for the association of the MEEVD peptide to the TPR2A domain using the Adaptive Biasing Force (ABF) methodology...
July 19, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28722257/mesoporous-tin-based-oxide-nanospheres-and-graphene-composites-as-advanced-anodes-for-lithium-ion-half-full-and-sodium-ion-batteries
#2
Yanyan He, Aihua Li, Caifu Dong, Chuanchuan Li, Liqiang Xu
The large volume variations of tin-based oxides hinder their extensive applications in the field of lithium ion batteries (LIBs). In this study, structure design, hybrid fabrication and carbon coating approaches have been simultaneously adopted to relieve these weaknesses. Therefore, uniform mesoporous NiO/SnO2@rGO, Ni-Sn oxide@rGO and SnO2@rGO nanosphere composites have been selectively fabricated. Among them, the obtained NiO/SnO2@rGO composite exhibits high capacity 800 mAh g-1 at 1000 mA g-1 after 400 cycles...
July 19, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28720834/chemical-inhibitors-of-candida-albicans-hyphal-morphogenesis-target-endocytosis
#3
Hagit Bar-Yosef, Nora Vivanco Gonzalez, Shay Ben-Aroya, Stephen J Kron, Daniel Kornitzer
Candida albicans is an opportunistic pathogen, typically found as a benign commensal yeast living on skin and mucosa, but poised to invade injured tissue to cause local infections. In debilitated and immunocompromised individuals, C. albicans may spread to cause life-threatening systemic infections. Upon contact with serum and at body temperature, C. albicans performs a regulated switch to filamentous morphology, characterized by emergence of a germ tube from the yeast cell followed by mold-like growth of branching hyphae...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28718505/immunogenomic-approaches-to-understand-the-function-of-immune-disease-variants
#4
REVIEW
Dafni Anna Glinos, Blagoje Soskic, Gosia Trynka
Mapping hundreds of genetic variants through genome wide association studies provided an opportunity to gain insights into the pathobiology of immune mediated diseases. However, since most of the disease variants fall outside the gene coding sequences, thereby implicating gene expression regulation as the causal mechanism, the functional interpretation of the exact role of the associated variants remains to be determined. Despite these challenges, integration of disease associated variants with large scale genomic maps of cell type specific gene regulation both at chromatin and transcript levels deliver examples of functionally prioritised causal variants and genes...
July 17, 2017: Immunology
https://www.readbyqxmd.com/read/28717283/training-pathways-in-oral-and-maxillofacial-surgery-across-the-globe-a-mini-review
#5
REVIEW
Sanjeev Kumar
Due to historical reasons, many different training pathways exist across countries that lead to a degree in oral and maxillofacial surgery. Although it is generally accepted to be a specialty of dentistry, the complex nature of procedures being performed by OMF surgeons today, has necessitated extensive general surgical training. Many countries have thus made dual qualification mandatory, while others have extended training programs in OMFS with integrated medical teaching. In India, frequent contact with foriegn experts, availability of world-class equipment and efforts of individual surgeons has ensured that the full scope of OMFS is practised in select centres of learning...
September 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28717031/phagocytic-receptors-activate-syk-and-src-signaling-during-borrelia-burgdorferi-phagocytosis
#6
Tess L Killpack, Maria Ballesteros, Stephen C Bunnell, Alice Bedugnis, Lester Kobzik, Linden T Hu, Tanja Petnicki-Ocwieja
Phagocytosis of the Lyme disease causing pathogen Borrelia burgdorferi has been shown to be important in generating an inflammatory response to the pathogen. As a result, understanding the mechanisms of phagocytosis has been an area of great interest in the field of Lyme disease. Several cell surface receptors that participate in B. burgdorferi phagocytosis have been reported, including scavenger receptor MARCO and integrin α3β1. We sought to define the mechanisms by which these receptors mediated phagocytosis and to identify signaling pathways activated downstream of these receptors upon contact with B...
July 17, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28715324/electrical-impedance-tomography-tissue-properties-to-image-measures
#7
Andy Adler, Alistair Boyle
Electrical Impedance Tomography (EIT) uses electrical stimulation and measurement at the body surface to image the electrical properties of internal tissues. It has the advantage of non-invasiveness and high temporal resolution but suffers from poor spatial resolution and sensitivity to electrode movement and contact quality. EIT can be useful to applications where there are conductive contrasts between tissues, fluids or gasses, such as imaging of cancerous or ischemic tissue or functional monitoring of breathing, blood flow, gastric motility and neural activity...
July 17, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28714723/the-implementation-and-testing-of-a-referral-management-system-to-address-barriers-to-treatment-seeking-among-primary-care-veterans-with-ptsd
#8
Kyle Possemato, Emily M Johnson, Laura O Wray, Brad Webster, Tracy Stecker
Primary care (PC) patients have low rates of engagement in evidence-based psychotherapy for PTSD due to a variety of patient- and system-level barriers. We conducted a hybrid effectiveness-implementation study of a referral management system, called coordinated and alternative pathway to engagement (CAPE), to address barriers to receiving evidence-based treatment for PTSD. CAPE included the delivery of 1 session of cognitive-behavioral therapy (CBT) within PC to identify and change treatment-seeking beliefs, phone contacts to assist veterans in attending appointments, and PC staff trainings on how to implement clinical practice guidelines for PTSD in PC...
July 17, 2017: Psychological Services
https://www.readbyqxmd.com/read/28713678/drug-development-against-the-hippo-pathway-in-mesothelioma
#9
REVIEW
Gavitt A Woodard, Yi-Lin Yang, Liang You, David M Jablons
Advances in the treatments for malignant pleural mesothelioma (MPM) have been disappointing until recently. Conventional cytotoxic drugs fail in MPM in part because they do not address the cancer stem cell population or stem cell pathways that drive tumor resistance and resurgence following treatment. The Hippo stem cell pathway regulates cell contact inhibition with tumor suppressor genes such as NF2 (Neurofibromatosis 2) upstream controlling YAP (Yes-associated protein 1) oncogenes. NF2 is mutated in 40-50% of all MPM and downstream YAP is constitutively active in greater than 70% of MPM, making the downstream YAP/TEAD (transcriptional enhancer associate domain) complex the ultimate target...
June 2017: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/28711737/subthalamic-deep-brain-stimulation-sweet-spots-and-hyperdirect-cortical-connectivity-in-parkinson-s-disease
#10
Harith Akram, Stamatios N Sotiropoulos, Saad Jbabdi, Dejan Georgiev, Philipp Mahlknecht, Jonathan Hyam, Thomas Foltynie, Patricia Limousin, Enrico De Vita, Marjan Jahanshahi, Marwan Hariz, John Ashburner, Tim Behrens, Ludvic Zrinzo
OBJECTIVES: Firstly, to identify subthalamic region stimulation clusters that predict maximum improvement in rigidity, bradykinesia and tremor, or emergence of side-effects; and secondly, to map-out the cortical fingerprint, mediated by the hyperdirect pathways which predict maximum efficacy. METHODS: High angular resolution diffusion imaging in twenty patients with advanced Parkinson's disease was acquired prior to bilateral subthalamic nucleus deep brain stimulation...
July 12, 2017: NeuroImage
https://www.readbyqxmd.com/read/28711300/raft-dependent-endocytic-movement-and-intracellular-cluster-formation-during-t%C3%A2-cell-activation-triggered-by-concanavalin-a
#11
Satomi Yabuuchi, Satoshi Endo, KeangOk Baek, Kunihide Hoshino, Yoshio Tsujino, Mun'delanji C Vestergaard, Masahiro Takagi
Certain food ingredients can stimulate the human immune system. A lectin, concanavalin A (ConA), from Canavalia ensiformis (jack bean) is one of the most well-known food-derived immunostimulants and mediates activation of cell-mediated immunity through T cell proliferation. Generally, T cell activation is known to be triggered by the interaction between T cells and antigen-presenting cells (APCs) via a juxtacrine (contact-dependent) signaling pathway. The mechanism has been well characterized and is referred to as formation of the immunological synapse (IS)...
July 12, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28709567/contact-dermatitis-considerations-in-atopic-dermatitis
#12
REVIEW
Chandler W Rundle, Daniel Bergman, Alina Goldenberg, Sharon E Jacob
Complex immunologic pathways, influenced by both genetic and environment triggers, contribute to the development of atopic dermatitis and allergic contact dermatitis. Suppressing mechanisms between the Th1-driven allergic contact dermatitis and the Th2-driven atopic dermatitis conditions were thought to reduce the simultaneous expression of both; however, recent evidence indicates that pediatric patients with atopic dermatitis are likely to develop clinically relevant positive patch tests and more likely to react to specific allergens, such as lanolin...
July 2017: Clinics in Dermatology
https://www.readbyqxmd.com/read/28706902/environmental-asbestos-exposure-and-risk-of-mesothelioma
#13
REVIEW
Curtis W Noonan
Mesothelioma is commonly considered an occupational disease occurring as a result of asbestos exposure in the workplace. Several avenues for environmental asbestos exposures have been described and may be associated with asbestos related disease, including mesothelioma. Worker take-home asbestos, or para-occupational exposure, has been well documented and is the most commonly reported pathway for asbestos exposure among mesothelioma cases that do not have history of occupational asbestos exposure. Observational studies have evaluated several communities with elevated mesothelioma incidence and environmental exposures attributed to local asbestos-related industries...
June 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28706510/natural-killer-cell-functions-during-the-innate-immune-response-to-pathogenic-streptococci
#14
Paul Lemire, Tristan Galbas, Jacques Thibodeau, Mariela Segura
Dendritic cells (DCs) and NK cells play a crucial role in the first phase of host defense against infections. Group B Streptococcus (GBS) and Streptococcus suis are encapsulated streptococci causing severe systemic inflammation, leading to septicemia and meningitis. Yet, the involvement of NK cells in the innate immune response to encapsulated bacterial infection is poorly characterized. Here, it was observed that these two streptococcal species rapidly induce the release of IFN-γ and that NK cells are the major cell type responsible for this production during the acute phase of the infection...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28705204/delay-along-the-care-seeking-journey-of-patients-with-ocular-surface-squamous-neoplasia-in-kenya
#15
Stephen Gichuhi, Joy Kabiru, Alain M'bongo Zindamoyen, Hillary Rono, Ernest Ollando, Joseph Wachira, Rhoda Munene, Timothy Onyuma, Mandeep S Sagoo, David Macleod, Helen A Weiss, Matthew J Burton
BACKGROUND: In Africa, accessing eye health services is a major challenge. Ocular surface squamous neoplasia (OSSN) is a substantial ocular health problem in Africa related to solar UV light exposure and HIV infection among other risk factors. The disease causes visual loss and even death in advanced cases. This study was conducted to assess referral pathway and treatment delay for patients with OSSN in Kenya. METHODS: Adults with conjunctival lesions presenting to four eye centres were asked about their occupations, when they noticed the growth, health facilities visited in seeking care, cost of consultation, surgery, medicines and histopathology and dates at each step...
July 14, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28705076/elucidation-of-stable-intermediates-in-urea-induced-unfolding-pathway-of-human-carbonic-anhydrase-ix
#16
Amresh Prakash, Gunjan Dixit, Naveen Kumar Meena, Ruhar Singh, Poonam Vishwakarma, Smriti Mishra, Andrew M Lynn
Human carbonic anhydrase IX (CAIX) has evolved as a promising biomarker for cancer prognosis, due to its overexpression in various cancer and restricted expression in normal tissue. However, limited information is available on its biophysical behavior. The unfolding of CAIX in aqueous urea solution was studied using all-atom molecular dynamics simulation approach. The results of this study revealed a stable intermediate state along the unfolding pathway of CAIX. At intermediate concentrations of urea (2.0-4...
July 14, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28702592/inhibition-of-gnnqqny-prion-peptide-aggregation-by-trehalose-a-mechanistic-view
#17
Nidhi Katyal, Shashank Deep
Deposition of amyloid fibrils is the seminal event in the pathogenesis of numerous neurodegenerative diseases. The formation of this amyloid assembly is the manifestation of a cascade of structural transitions including toxic oligomer formation in the early stages of aggregation. Thus a viable therapeutic strategy involves the use of small molecular ligands to interfere with this assembly. In this perspective, we have explored the kinetics of aggregate formation of the fibril forming GNNQQNY peptide fragment from the yeast prion protein SUP35 using multiple all atom MD simulations with explicit solvent and provided mechanistic insights into the way trehalose, an experimentally known aggregation inhibitor, modulates the aggregation pathway...
July 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28701290/using-new-and-emerging-technologies-to-identify-and-respond-to-suicidality-among-help-seeking-young-people-a-cross-sectional-study
#18
Frank Iorfino, Tracey A Davenport, Laura Ospina-Pinillos, Daniel F Hermens, Shane Cross, Jane Burns, Ian B Hickie
BACKGROUND: Suicidal thoughts are common among young people presenting to face-to-face and online mental health services. The early detection and rapid response to these suicidal thoughts and other suicidal behaviors is a priority for suicide prevention and early intervention efforts internationally. Establishing how best to use new and emerging technologies to facilitate person-centered systematic assessment and early intervention for suicidality is crucial to these efforts. OBJECTIVE: The aim of this study was to examine the use of a suicidality escalation protocol to respond to suicidality among help-seeking young people...
July 12, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28697804/ang-ii-at2r-increases-mesenchymal-stem-cell-migration-by-signaling-through-the-fak-and-rhoa-cdc42-pathways-in-vitro
#19
Xiu-Ping Xu, Hong-Li He, Shu-Ling Hu, Ji-Bin Han, Li-Li Huang, Jing-Yuan Xu, Jian-Feng Xie, Ai-Ran Liu, Yi Yang, Hai-Bo Qiu
BACKGROUND: Mesenchymal stem cells (MSCs) migrate via the bloodstream to sites of injury and are possibly attracted by inflammatory factors. As a proinflammatory mediator, angiotensin II (Ang II) reportedly enhances the migration of various cell types by signaling via the Ang II receptor in vitro. However, few studies have focused on the effects of Ang II on MSC migration and the underlying mechanisms. METHODS: Human bone marrow MSCs migration was measured using wound healing and Boyden chamber migration assays after treatments with different concentrations of Ang II, an AT1R antagonist (Losartan), and/or an AT2R antagonist (PD-123319)...
July 12, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28696203/a-broadly-distributed-toxin-family-mediates-contact-dependent-antagonism-between-gram-positive-bacteria
#20
John C Whitney, S Brook Peterson, Jungyun Kim, Manuel Pazos, Adrian J Verster, Matthew C Radey, Hemantha D Kulasekara, Mary Q Ching, Nathan P Bullen, Diane Bryant, Young Ah Goo, Michael G Surette, Elhanan Borenstein, Waldemar Vollmer, Joseph D Mougous
The Firmicutes are a phylum of bacteria that dominate numerous polymicrobial habitats of importance to human health and industry. Although these communities are often densely colonized, a broadly distributed contact-dependent mechanism of interbacterial antagonism utilized by Firmicutes has not been elucidated. Here we show that proteins belonging to the LXG polymorphic toxin family present in Streptococcus intermedius mediate cell contact- and Esx secretion pathway-dependent growth inhibition of diverse Firmicute species...
July 11, 2017: ELife
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