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https://www.readbyqxmd.com/read/29295762/from-nature-to-creation-going-around-in-circles-the-art-of-peptide-cyclization
#1
REVIEW
Rui-Yang Zhang, Parashar Thapa, Michael J Espiritu, Vinay Menon, Jon-Paul Bingham
Cyclic peptides and cyclotides are becoming common identities within the present efforts seen in peptide engineering - as we seek approaches to achieve potent biological activity, pharmacological selectivity, structurally stability and oral bioavailability. Yet this unique family of peptides has faced uncommon hurdles in their discovery, synthesis and bioengineering, retaining to characteristics that truly deviate these from their linear counterparts. In this mini-review we take a board spectrum approach to introduce this novel family of biomolecules and the troubles that they face in their sequence and disulfide connectivity assignment, together highlighting the present combined strategies involved in cyclic peptide/cyclotide synthesis and modification...
December 14, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29276375/prophylactic-intracameral-levofloxacin-in-cataract-surgery-an-evaluation-of-safety
#2
Cesar Ramon G Espiritu, Joanne G Bolinao
Purpose: To evaluate posterior and anterior segment safety of an intracameral injection of levofloxacin 0.5% ophthalmic solution as prophylaxis for patients undergoing cataract extraction and intraocular lens implantation. Setting: This study was conducted at Manila Doctors Hospital, Ermita, Manila, Philippines. Design: This was a prospective interventional study. Methods: Eyes undergoing standard phacoemulsification cataract surgery with intraocular lens implantation were treated with intracameral levofloxacin 0...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29131579/binding-and-energetics-of-electron-transfer-between-an-artificial-four-helix-mn-protein-and-reaction-centers-from-rhodobacter-sphaeroides
#3
Eduardo Espiritu, Tien Le Olson, JoAnn C Williams, James P Allen
The ability of an artificial four-helix bundle Mn-protein, P1, to bind and transfer an electron to photosynthetic reaction centers from the purple bacterium Rhodobacter sphaeroides was characterized using optical spectroscopy. Upon illumination of reaction centers, an electron is transferred from P, the bacteriochlorophyll dimer, to QA, the primary electron acceptor. The P1 Mn-protein can bind to the reaction center and reduce the oxidized bacteriochlorophyll dimer, P+, with a dissociation constant of 1.2 µM at pH 9...
November 13, 2017: Biochemistry
https://www.readbyqxmd.com/read/29059326/kinetics-of-human-mutant-tau-prion-formation-in-the-brains-of-2-transgenic-mouse-lines
#4
Amanda L Woerman, Smita Patel, Sabeen A Kazmi, Abby Oehler, Yevgeniy Freyman, Lloyd Espiritu, Robert Cotter, Julian A Castaneda, Steven H Olson, Stanley B Prusiner
Importance: Accumulation of the protein tau is a defining characteristic of several neurodegenerative diseases. Thorough assessment of transgenic (Tg) mouse lines that replicate this process is critical for establishing the models used for testing anti-tau therapeutics in vivo. Objective: To define a consistent mouse model of disease for use in future compound efficacy studies. Design, Setting, and Participants: In this time course study, cohorts of Tg and control mice were euthanized at defined intervals...
October 23, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/29031828/non-progressing-cancer-patients-have-persistent-b-cell-responses-expressing-shared-antibody-paratopes-that-target-public-tumor-antigens
#5
Jeff DeFalco, Michael Harbell, Amy Manning-Bog, Gilson Baia, Alexander Scholz, Beatriz Millare, May Sumi, Danhui Zhang, Felix Chu, Christine Dowd, Patricia Zuno-Mitchell, Dongkyoon Kim, Yvonne Leung, Shuwei Jiang, Xiaobin Tang, Kevin S Williamson, Xiaomu Chen, Sean M Carroll, Gregg Espiritu Santo, Nicole Haaser, Ngan Nguyen, Eldar Giladi, David Minor, Yann Chong Tan, Jeremy B Sokolove, Lawrence Steinman, Tito A Serafini, Guy Cavet, Norman M Greenberg, Jacob Glanville, Wayne Volkmuth, Daniel E Emerling, William H Robinson
There is significant debate regarding whether B cells and their antibodies contribute to effective anti-cancer immune responses. Here we show that patients with metastatic but non-progressing melanoma, lung adenocarcinoma, or renal cell carcinoma exhibited increased levels of blood plasmablasts. We used a cell-barcoding technology to sequence their plasmablast antibody repertoires, revealing clonal families of affinity matured B cells that exhibit progressive class switching and persistence over time. Anti-CTLA4 and other treatments were associated with further increases in somatic hypermutation and clonal family size...
October 11, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28882760/biochemical-and-spectroscopic-characterization-of-dinuclear-mn-sites-in-artificial-four-helix-bundle-proteins
#6
Tien L Olson, Eduardo Espiritu, Selvakumar Edwardraja, Elizabeth Canarie, Marco Flores, JoAnn C Williams, Giovanna Ghirlanda, James P Allen
To better understand metalloproteins with Mn-clusters, we have designed artificial four-helix bundles to have one, two, or three dinuclear metal centers able to bind Mn(II). Circular dichroism measurements showed that the Mn-proteins have substantial α-helix content, and analysis of electron paramagnetic resonance spectra is consistent with the designed number of bound Mn-clusters. The Mn-proteins were shown to catalyze the conversion of hydrogen peroxide into molecular oxygen. The loss of hydrogen peroxide was dependent upon the concentration of protein with bound Mn, with the proteins containing multiple Mn-clusters showing greater activity...
December 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28864766/distinct-intracellular-sac-camp-domains-regulate-er-calcium-signaling-and-oxphos-function
#7
Federica Valsecchi, Csaba Konrad, Marilena D'Aurelio, Lavoisier S Ramos-Espiritu, Anna Stepanova, Suzanne R Burstein, Alexander Galkin, Jordi Magranè, Anatoly Starkov, Jochen Buck, Lonny R Levin, Giovanni Manfredi
cAMP regulates a wide variety of physiological functions in mammals. This single second messenger can regulate multiple, seemingly disparate functions within independently regulated cell compartments. We previously identified one such compartment inside the matrix of the mitochondria, where soluble adenylyl cyclase (sAC) regulates oxidative phosphorylation (OXPHOS). We now show that sAC KO fibroblasts have a defect in OXPHOS activity and attempt to compensate for this defect by increasing OXPHOS proteins. Importantly, sAC KO cells also exhibit decreased probability of endoplasmic reticulum (ER) Ca(2+) release associated with diminished phosphorylation of the inositol 3-phosphate receptor...
September 1, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28835383/estrogen-receptor%C3%AE-is-a-novel-target-in-acute-myeloid-leukemia
#8
Sarah-Grace Rota, Alessia Roma, Iulia Dude, Christina Ma, Robert Stevens, Janet MacEachern, Joanna Graczyk, Shaundrei Mabriel G Espiritu, Praveen N Rao, Mark D Minden, Elena Kreinin, David A Hess, Andrew C Doxey, Paul A Spagnuolo
Acute myeloid leukemia (AML) is a devastating disease characterized by poor patient outcome and suboptimal chemotherapeutics. Here, a high throughput screen identified diosmetin, a citrus flavonoid, with anti-AML activity. Diosmetin imparted selective toxicity against leukemia and leukemia stem cells in vitro and in vivo with no effect on normal hematopoietic stem cells. Mechanistically, we demonstrated that diosmetin targets estrogen receptor (ER) β. ERβ expression conferred cell sensitivity, as patient-derived AML cells with high levels of ERβ were sensitive whereas cells with low ERβ were insensitive to diosmetin...
August 23, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28807693/safety-and-feasibility-of-rehabilitation-interventions-in-children-undergoing-hematopoietic-stem-cell-transplant-with-thrombocytopenia
#9
Katarzyna Ibanez, Noel Espiritu, Regine L Souverain, Laura Stimler, Lauren Ward, Elyn R Riedel, Rachel Lehrman, Farid Boulad, Michael Dean Stubblefield
OBJECTIVE: To analyze the relationship between platelet counts, the intensities of physical therapies (PT) and occupational therapies (OT) services received, and the frequency of bleeding complications in children undergoing hematopoietic stem cell transplants (HSCT) during a period of severe thrombocytopenia. DESIGN: Retrospective review study SETTING: Tertiary care hospital PARTICIPANTS: Children (age <18) hospitalized for HSCT in 2010 and 2011 who received PT and OT services while markedly thrombocytopenic (platelets≤50K/mcL)...
August 11, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28803228/utility-of-routine-urine-cmv-pcr-and-total-serum-igm-testing-of-small-for-gestational-age-infants-a-single-center-review
#10
Michael M Espiritu, Sean Bailey, Elena V Wachtel, Pradeep V Mally
BACKGROUND: Due to the extremely low incidence of TORCH (toxoplasmosis, rubella, CMV, herpes simplex virus) infections, diagnostic testing of all small for gestational age (SGA) infants aimed at TORCH etiologies may incur unnecessary tests and cost. OBJECTIVE: To determine the frequency of urine CMV PCR and total IgM testing among infants with birth weight <10% and the rate of test positivity. To evaluate the frequency of alternative etiologies of SGA in tested infants...
August 14, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28793096/spiritual-well-being-and-quality-of-life-of-older-adults-in-hemodialysis
#11
Calíope Pilger, Renata Ohana Pereira Dos Santos, Maicon Henrique Lentsck, Sueli Marques, Luciana Kusumota
Objective: To analyze the relationship between spiritual well-being, sociodemographic, economic, religious, and health variables and the quality of life of older adults undergoing hemodialysis. Method: This was a cross-sectional and correlational study conducted with 169 older adults undergoing hemodialysis. The researchers conducted interviews to collect sociodemographic, economic, religious, and health data and applied the Spiritual Well-Being Scale (SWBS) and the WHO quality of life assessment (WHOQOL-BREF and WHOQOL-OLD)...
July 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28792263/implementing-and-evaluating-a-community-based-inter-institutional-interprofessional-education-pilot-programme
#12
Chante Stubbs, Mavis N Schorn, Jacinta P Leavell, Elena Wong Espiritu, Gerald Davis, Chad K Gentry, Elisa Friedman, Traci Patton, Ali Graham, Ron Crowder, Consuelo H Wilkins
Many health professions programmes have begun integrating interprofessional learning into their curricula; however, community-based interprofessional education (IPE) initiatives are relatively scarce. The Meharry-Vanderbilt Alliance IPE Faculty Collaborative, comprised of faculty from five institutions, developed a community-based IPE programme that allowed students to engage in meaningful interprofessional activities while exposing them to social determinants of health. Thirty students from ten professions were divided into six teams and paired with three community organisations...
August 9, 2017: Journal of Interprofessional Care
https://www.readbyqxmd.com/read/28790049/cor-triatriatum-and-stroke
#13
Jose Danilo Bengzon Diestro, Joseph Justin Hipolito Regaldo, Eddieson Masangcay Gonzales, Maria Kristina Casanova Dorotan, Adrian Isidro Espiritu, Jose Leonard Rivera Pascual
Cor triatriatum sinistrum (CTS) is a congenital anomaly where the left atrium is divided into two compartments by a fibromuscular membrane. This report aims to add to the literature on a rare cardiac condition that can cause neurological morbidity. We report a case of a 19-year-old female with an infarct in the right middle cerebral artery (MCA) territory initially maintained on aspirin. Eighteen months later, she had recurrence of weakness, for which repeat transthoracic echocardiography (TTE) and re-evaluation of the first TTE demonstrated a hyperechoic membrane spanning the width of the left atrium, clinching the diagnosis of CTS...
August 8, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28699996/quality-of-life-and-religious-spiritual-coping-in-palliative-cancer-care-patients
#14
Ticiane Dionizio de Sousa Matos, Silmara Meneguin, Maria de Lourdes da Silva Ferreira, Helio Amante Miot
Objectives: to compare the quality of life and religious-spiritual coping of palliative cancer care patients with a group of healthy participants; assess whether the perceived quality of life is associated with the religious-spiritual coping strategies; identify the clinical and sociodemographic variables related to quality of life and religious-spiritual coping. Method: cross-sectional study involving 96 palliative outpatient care patient at a public hospital in the interior of the state of São Paulo and 96 healthy volunteers, using a sociodemographic questionnaire, the McGill Quality of Life Questionnaire and the Brief Religious-Spiritual Coping scale...
July 10, 2017: Revista Latino-americana de Enfermagem
https://www.readbyqxmd.com/read/28630916/surface-transport-and-quantum-hall-effect-in-ambipolar-black-phosphorus-double-quantum-wells
#15
Son Tran, Jiawei Yang, Nathaniel Gillgren, Timothy Espiritu, Yanmeng Shi, Kenji Watanabe, Takashi Taniguchi, Seongphill Moon, Hongwoo Baek, Dmitry Smirnov, Marc Bockrath, Ruoyu Chen, Chun Ning Lau
Quantum wells (QWs) constitute one of the most important classes of devices in the study of two-dimensional (2D) systems. In a double-layer QW, the additional "which-layer" degree of freedom gives rise to celebrated phenomena, such as Coulomb drag, Hall drag, and exciton condensation. We demonstrate facile formation of wide QWs in few-layer black phosphorus devices that host double layers of charge carriers. In contrast to traditional QWs, each 2D layer is ambipolar and can be tuned into n-doped, p-doped, or intrinsic regimes...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28587551/conceptualizations-of-illness-among-relatives-of-patients-diagnosed-with-schizophrenia
#16
Cecília C Villares, Cristina P Redko, Jair J Mari
Family concepts of a relative's illness are an important part of the coping process and reveal the cultural construction of the experience of illness. As part of a qualitative study conducted in the Schizophrenia Outpatient Clinic of the Department of Psychiatry, Escola Paulista de Medicina - UNIFESP, 14 relatives of eight outpatients diagnosed with schizophrenia were interviewed and invited to talk freely about their ideas and feelings concerning their relative's problem. Qualitative analysis was used to identify categories of illness representations...
June 2017: International Review of Psychiatry
https://www.readbyqxmd.com/read/28559265/hepatitis-b-virus-capsid-assembly-modulators-but-not-nucleoside-analogs-inhibit-the-production-of-extracellular-pregenomic-rna-and-spliced-rna-variants
#17
Angela M Lam, Suping Ren, Christine Espiritu, Mollie Kelly, Vincent Lau, Lingjie Zheng, George D Hartman, Osvaldo A Flores, Klaus Klumpp
The hepatitis B virus (HBV) core protein serves multiple essential functions in the viral life cycle, and antiviral agents that target the core protein are being developed. Capsid assembly modulators (CAMs) are compounds that target core and misdirect capsid assembly, resulting in the suppression of HBV replication and virion production. Besides HBV DNA, circulating HBV RNA has been detected in patient serum and can be associated with the treatment response. Here we studied the effect of HBV CAMs on the production of extracellular HBV RNA using infected HepaRG cells and primary human hepatocytes...
August 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28265835/heavy-metal-concentrations-in-soils-and-vegetation-in-urban-areas-of-quezon-city-philippines
#18
Ian A Navarrete, Christella C Gabiana, Joan Ruby E Dumo, Severino G Salmo, Maria Aileen Leah G Guzman, Nestor S Valera, Emilyn Q Espiritu
Limited data have been published on the chemistry of urban soils and vegetation in the Philippines. The aim of this study is to quantify the concentrations of heavy metals (i.e., Cr, Ni, Cu, Zn, and Pb) in soils and vegetation in the urban landscape of Quezon City, Philippines, and to elucidate the relationships between soil properties and the concentration of heavy metals pertaining to different land uses [i.e., protected forest (LM), park and wildlife area (PA), landfill (PL), urban poor residential and industrial areas (RA), and commercial areas (CA)]...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28247567/spiritual-coping-a-focus-of-new-nursing-diagnoses
#19
Sandra Rosado Cabaço, Sílvia Caldeira, Margarida Vieira, Beth Rodgers
OBJECTIVE: To define the antecedents, consequents, and attributes of spiritual coping. METHODS: Rodgers' evolutionary model for concept analysis was used to guide an integrative literature review of qualitative research. FINDINGS: Six qualitative articles were included and elements that define and contextualize the concept were identified. CONCLUSIONS: Three new nursing diagnoses are proposed, based on qualitative findings...
March 1, 2017: International Journal of Nursing Knowledge
https://www.readbyqxmd.com/read/28092244/-depression-and-burden-on-primary-caregivers-of-elderly-persons-with-physical-dependence-of-the-umf-171
#20
Cristina Navarro-Sandoval, Lizbeth Carlota Uriostegui-Espíritu, Edna Gabriela Delgado-Quiñones, Minerva Natalia Sahagún-Cuevas
BACKGROUND: According to the National Health and Nutrition Survey of 2012, more than a quarter of older adults (26.9%) have some degree of disability, requiring a primary caregiver to perform basic activities of daily living. The aim is to determine the prevalence of depression and burden on primary caregivers of elderly persons with physical dependence. METHODS: A descriptive cross-sectional study with non-probability sampling that included the primary caregivers of elderly patients with physical dependence...
January 2017: Revista Médica del Instituto Mexicano del Seguro Social
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