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Anomitra Dey, Aditya Kamat, Sonal Nayak, Dganit Danino, Ellina Kesselman, Prajakta Dandekar, Ratnesh Jain
Researchers have explored the ability of chitosan to form nanoparticles, to suit varying applications, ranging from wound-healing to gene delivery. Ionic gelation is a widely used method for formulating chitosan nanoparticles, where self-assembly plays a crucial role. This self-assembly is initially promoted by hydrophilic-hydrophobic parity amongst individual chitosan residues, along with electrostatic and Van der Waals interactions with the cross-linker. However, until now the intrinsic ability of chitosan to self-assemble is not widely studied; hence, we investigate the self-assembly of chitosan, based on proton balance between its protonated and deprotonated residues, to promote facile nanoparticle synthesis...
March 14, 2018: Colloids and Surfaces. B, Biointerfaces
Marc Sorel, Naaman Zrek, Blanche Locko, Catherine Armessen, Samar S Ayache, Jean-Pascal Lefaucheur
OBJECTIVE: To evaluate the changes in glutamate/GABA balance of intracortical excitability produced by ketamine, delivered at subanaesthetic dose to treat patients with complex regional pain syndrome (CRPS). METHODS: In 19 patients with CRPS, we assessed the effect of a 5-day ketamine protocol on various clinical aspects, including pain and depression, and on cortical excitability parameters provided by transcranial magnetic stimulation testing. RESULTS: The rest motor threshold (RMT) and the amplitude of the motor evoked potentials at 120% of RMT were not modified after ketamine therapy...
March 8, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
Allan McGroarty, Rebecca McCartan
PURPOSE: Although considerable efforts have been made to investigate the effectiveness of pharmacological treatments for stuttering, little is known about how the stuttering community perceives these treatments. This study aimed to assess and quantify beliefs regarding pharmacotherapy for adults who stutter and to establish whether behavioural intentions to undertake treatment were related to these beliefs. METHOD: An adapted version of the Beliefs about Medicine Questionnaire was completed by adults who stutter...
March 13, 2018: Journal of Communication Disorders
David C Grossman, Susan J Curry, Douglas K Owens, Michael J Barry, Aaron B Caughey, Karina W Davidson, Chyke A Doubeni, John W Epling, Alex R Kemper, Alex H Krist, Martha Kubik, Seth Landefeld, Carol M Mangione, Michael Silverstein, Melissa A Simon, Chien-Wen Tseng
Importance: Skin cancer is the most common type of cancer in the United States. Although invasive melanoma accounts for only 2% of all skin cancer cases, it is responsible for 80% of skin cancer deaths. Basal and squamous cell carcinoma, the 2 predominant types of nonmelanoma skin cancer, represent the vast majority of skin cancer cases. Objective: To update the 2012 US Preventive Services Task Force (USPSTF) recommendation on behavioral counseling for the primary prevention of skin cancer and the 2009 recommendation on screening for skin cancer with skin self-examination...
March 20, 2018: JAMA: the Journal of the American Medical Association
Andrew Kaufman, Ezen Choo, Anna Koh, Robin Dando
Despite evidence that the ability to taste is weakened by obesity and can be rescued with weight loss intervention, few studies have investigated the molecular effects of obesity on the taste system. Taste bud cells undergo continual turnover even in adulthood, exhibiting an average life span of only a few weeks, tightly controlled by a balance of proliferation and cell death. Recent data reveal that an acute inflammation event can alter this balance. We demonstrate that chronic low-grade inflammation brought on by obesity reduces the number of taste buds in gustatory tissues of mice-and is likely the cause of taste dysfunction seen in obese populations-by upsetting this balance of renewal and cell death...
March 2018: PLoS Biology
Tania E Sakanaka, Jaspret Gill, Martin D Lakie, Raymond F Reynolds
Individuals may stand with a range of ankle angles. Furthermore, shoes or floor surfaces may elevate or depress their heels. Here we ask how these situations impact ankle stiffness and balance. We performed two studies (each with 10 participants) in which the triceps surae, Achilles tendon and aponeurosis were stretched either passively, by rotating the support surface, or actively by leaning forward. Participants stood freely on footplates which could rotate around the ankle joint axis. Brief, small stiffness-measuring perturbations (<0...
2018: PloS One
Hee Kyoung Kang, Moon-Chang Choi, Chang Ho Seo, Yoonkyung Park
Various organisms exist in the oceanic environment. These marine organisms provide an abundant source of potential medicines. Many marine peptides possess anticancer properties, some of which have been evaluated for treatment of human cancer in clinical trials. Marine anticancer peptides kill cancer cells through different mechanisms, such as apoptosis, disruption of the tubulin-microtubule balance, and inhibition of angiogenesis. Traditional chemotherapeutic agents have side effects and depress immune responses...
March 20, 2018: International Journal of Molecular Sciences
Ariel F Pomputius
Wellness-the balance of mental, emotional, spiritual, and physical health for the overall health benefit of the individual-is a growing concern, particularly for professionals in the medical field. Although wellness is usually viewed in opposition to technology, more digital devices and mobile applications are emerging to support wellness for health consumers. This wellness technology seeks to improve the overall health of the user through increasing calm and decreasing stress. This column will explain what wellness technology is, concerns over its widespread application, examples of wellness devices on the market currently, and an overview of where it is being applied in libraries...
April 2018: Medical Reference Services Quarterly
André Bonadias Gadelha, Silvia Gonçalves Ricci Neri, Ricardo Jacó de Oliveira, Martim Bottaro, Ana Cristina de David, Baruch Vainshelboim, Ricardo M Lima
Background/Study context: Falls represent the leading cause of accidental deaths in the elderly. Sarcopenia is a geriatric syndrome defined as the loss of muscle mass and strength. However, the association between falls and sarcopenia is still unclear. Thus, the aim of the present study was to investigate the association between different stages of sarcopenia and postural balance, risk of falls, and fear of falling in community-dwelling older women. METHODS: A total of 196 women (68.6 ± 6...
March 20, 2018: Experimental Aging Research
Kristine A Schulz, Elnaz Esmati, Frederick A Godley, Claude L Hill, Ashkan Monfared, Michael Teixido, Debara L Tucci, David L Witsell
Objective To evaluate the prevalence of migraine disease in an otolaryngologic cohort and migraine-related otologic and sinonasal symptoms in this population. Study Design Cross-sectional study utilizing the CHEER (Creating Healthcare Excellence through Education and Research) network for recruitment. Setting Patients were recruited in a cross-sectional and pragmatic manner in 14 CHEER sites between June 2015 and March 2017 (9 academic, 5 community based). Subjects and Methods Patients were included if they were aged ≥18 years and seen for any concern that was not head and neck cancer...
March 1, 2018: Otolaryngology—Head and Neck Surgery
Beatrice Emmanouil, Katherine Browne, Dorothy Halliday, Allyson Parry
PURPOSE: Patients with Neurofibromatosis type 2 often experience debilitating neuro-otological problems which affect their mobility and balance. This study examined the efficacy of a personalised program of vestibular rehabilitation for patients with Neurofibromatosis type 2. MATERIALS AND METHODS: An observational cohort study analysing routinely collected data for 21 patients in a highly specialised Neurofibromatosis type 2 service. Vestibular rehabilitation comprised an initial one-hour assessment followed by a patient-specific exercise program reviewed in person and by email consultations...
March 20, 2018: Disability and Rehabilitation
Jin-Xuan Fan, Zi-Hao Li, Xin-Hua Liu, Diwei Zheng, Ying Chen, Xian-Zheng Zhang
Oral drug administration is widely adopted for diverse drugs, and enjoys the convenience of use and capbility to reach different parts of the body via the bloodstream. However, it is generally not feasible for biomacromolecular anti-tumor drugs such as protein and nucleic acids due to the the limited absorption through gastrointestinal tract (GIT) and the poor tumor targeting. Here, we report a non-invasive thermally-sensitive programmable therapetic system using bacteria E. coli MG1655 as an vehicle for tumor treatments via oral administration...
March 20, 2018: Nano Letters
Katarzyna J Błochowiak, Dorota Trzybulska, Anna Olewicz-Gawlik, Jan J Sikora, Michalina Nowak-Gabryel, Jarosław Kocięcki, Henryk Witmanowski, Jerzy Sokalski
BACKGROUND: Aberrant angiogenesis plays a role in the pathogenesis of Sjögren's syndrome (SS). OBJECTIVES: The aim of this study was to compare the levels of vascular endothelial growth factor (VEGF) and epidermal growth factor (EGF) in stimulatory parotid saliva and in serum in healthy subjects (HS), patients with primary SS (pSS) and secondary SS (sSS) and to evaluate the expression of EGF, proangiogenic VEGF165 and antiangiogenic VEGF165 b mRNA isoforms. Additionally, we determined the salivary levels of serine/arginine splicing factor (SRSF1), which regulates VEGF165 and VEGF165 b expression...
March 20, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Neha Dewan, Joy C MacDermid, Ruby Grewal, Karen Beattie
In a prospective cohort of 113 patients followed 4 years after distal radius fracture (DRF), 24% of patients experienced a subsequent fall and 19% experienced a subsequent fracture. People with poor balance, greater fracture-specific pain/disability, low bone density, and prior falls had nearly a three times higher risk of subsequent falls. PURPOSE: To determine the extent to which modifiable risk factors alone or in combination with bone mineral density (BMD) and non-modifiable risk factors predict subsequent falls and osteoporotic (OP) fractures after distal radius fracture (DRF)...
March 20, 2018: Archives of Osteoporosis
Chris Yin Wei Chan, Chee Kidd Chiu, Xin Yi Ler, Yun Hui Ng, Xue Han Chian, Pheng Hian Tan, Mun Keong Kwan
STUDY DESIGN: Retrospective study. OBJECTIVE: To investigate the association between postoperative upper instrumented vertebra (UIV) Tilt Angle with postoperative medial shoulder and neck imbalance. SUMMARY OF BACKGROUND DATA: Studies had found that current recommendations for UIV selection were not predictive of good postoperative shoulder balance. METHODS: 98 AIS patients with Lenke 1/2 curves who underwent posterior spinal fusion between 2013 and 2014 with minimum follow up of 2 years were recruited...
March 19, 2018: Spine
Felix A Thomas, Volker Dietz, Thiemo Scharfenberger, Miriam Schrafl-Altermatt
The aim of this study was to evaluate the influence of unilateral reduction of afferent input on the 'neural coupling' mechanism during cooperative hand movements. This 'neural coupling' is reflected in the task-specific appearance of contralateral reflex responses in forearm muscles to unilateral arm nerve stimulation. Sensory input from the right hand was reduced by ischemic nerve block at the right wrist. Ipsilateral and contralateral reflex responses elicited by stimulation of the ulnar nerve either at the left or the right wrist proximal to the nerve block were recorded in forearm extensors during the performance of cooperative hand movements...
March 19, 2018: Neuroreport
Sanjay V Desai, David A Asch, Lisa M Bellini, Krisda H Chaiyachati, Manqing Liu, Alice L Sternberg, James Tonascia, Alyssa M Yeager, Jeremy M Asch, Joel T Katz, Mathias Basner, David W Bates, Karl Y Bilimoria, David F Dinges, Orit Even-Shoshan, David M Shade, Jeffrey H Silber, Dylan S Small, Kevin G Volpp, Judy A Shea
Background Concern persists that inflexible duty-hour rules in medical residency programs may adversely affect the training of physicians. Methods We randomly assigned 63 internal medicine residency programs in the United States to be governed by standard duty-hour policies of the 2011 Accreditation Council for Graduate Medical Education (ACGME) or by more flexible policies that did not specify limits on shift length or mandatory time off between shifts. Measures of educational experience included observations of the activities of interns (first-year residents), surveys of trainees (both interns and residents) and faculty, and intern examination scores...
March 20, 2018: New England Journal of Medicine
Rosa I Sanchez, Kerry L Fillgrove, Ka Lai Yee, Yuexia Liang, Bing Lu, Aditya Tatavarti, Rachael Liu, Matt S Anderson, Martin O Behm, Li Fan, Yun Li, Joan R Butterton, Marian Iwamoto, Sauzanne G Khalilieh
Absorption, distribution, metabolism and elimination of doravirine (MK-1439), a novel non-nucleoside reverse transcriptase inhibitor, were investigated. Two clinical trials were conducted in healthy subjects: an oral single dose [14 C]doravirine (350 mg, ∼200 µCi) trial (N = 6) and an intravenous (IV) single-dose doravirine (100 µg) trial (N = 12). In vitro metabolism, protein binding, apparent permeability and P-glycoprotein (P-gp) transport studies were conducted to complement the clinical trials...
March 20, 2018: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
Shuaifei Wang, Xiaoyan Qian, Yuanyu Chang, Jiayue Sun, Xiujing Xing, Wendy Fields Ballard, Jason J Chruma
The impact of the steric and electronic factors in both the para-substituted benzaldimine and 2,2-diarylglycine components on the regioselectivity and enantioselectivity of the palladium-catalyzed decarboxylative allylation of allyl 2,2-diarylglycinate aryl imines was explored. These studies revealed that using 2,2-di(2-methoxyphenyl)glycine as the amino acid linchpin allowed for the exclusive synthesis of the desired homoallylic benzophenone imine regioisomers, independent of the nature of the imine moiety, in typically high yields...
March 20, 2018: Journal of Organic Chemistry
C Kaewpila, K Sommart, M Mitsumori
The mitigation of enteric methane emission in beef cattle production is important for reducing feed energy loss and increasing environmental sustainability. The main objective of this study was to evaluate the effect of different oilseeds included in fermented total mixed rations (whole soyabean seed (SBS, control), whole kapok seed (KPS) and cracked oil palm fruit (OPF)) on feed intake, digestibility, rumen microbial populations, energy partition and methane emissions in different cattle genotypes (Charolais crossbred v...
March 20, 2018: Animal: An International Journal of Animal Bioscience
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