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https://www.readbyqxmd.com/read/28538737/lymphatic-endothelial-s1p-promotes-mitochondrial-function-and-survival-in-naive-t-cells
#1
Alejandra Mendoza, Victoria Fang, Cynthia Chen, Madhavika Serasinghe, Akanksha Verma, James Muller, V Sai Chaluvadi, Michael L Dustin, Timothy Hla, Olivier Elemento, Jerry E Chipuk, Susan R Schwab
Effective adaptive immune responses require a large repertoire of naive T cells that migrate throughout the body, rapidly identifying almost any foreign peptide. Because the production of T cells declines with age, naive T cells must be long-lived. However, it remains unclear how naive T cells survive for years while constantly travelling. The chemoattractant sphingosine 1-phosphate (S1P) guides T cell circulation among secondary lymphoid organs, including spleen, lymph nodes and Peyer's patches, where T cells search for antigens...
May 24, 2017: Nature
https://www.readbyqxmd.com/read/28538330/simultaneous-surgical-decompression-of-bilateral-subdural-hematoma-and-an-administration-of-epidural-blood-patch-for-spontaneous-intracranial-hypotension
#2
Ramamani Mariappan, Amitav Philip, Edmond J Gandham, Krishnaprabhu Raju
No abstract text is available yet for this article.
May 19, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28538006/evaluation-and-management-of-patch-test-negative-patients-with-generalized-dermatitis
#3
Alison Spiker, Christen M Mowad
BACKGROUND: Patients with generalized dermatitis are common in dermatology practices. Allergic contact dermatitis is often suspected, and patients frequently undergo patch testing. When patch testing result is negative, further evaluation and management of these patients are challenging. OBJECTIVE: The purpose of this study was to survey members of the American Contact Dermatitis Society regarding the evaluation and management of patch test-negative patients with generalized dermatitis...
May 23, 2017: Dermatitis
https://www.readbyqxmd.com/read/28533325/physiologic-regulation-of-heart-rate-and-blood-pressure-involves-connexin-36-containing-gap-junctions
#4
Varinder K Lall, Gareth Bruce, Larysa Voytenko, Mark Drinkhill, Kerstin Wellershaus, Klaus Willecke, Jim Deuchars, Susan A Deuchars
Chronically elevated sympathetic nervous activity underlies many cardiovascular diseases. Elucidating the mechanisms contributing to sympathetic nervous system output may reveal new avenues of treatment. The contribution of the gap junctional protein connexin 36 (Cx36) to the regulation of sympathetic activity and thus blood pressure and heart rate was determined using a mouse with specific genetic deletion of Cx36. Ablation of the Cx36 protein was confirmed in sympathetic preganglionic neurons of Cx36 knockout (KO) mice...
May 22, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28530061/-purpuric-mycosis-fungoides
#5
Boaz Amichai, Boaz Gabay, Mario Cordoba, Deborah Kidron, Marcelo Grunwald
A 26-year-old female presented with 4-years duration of asymptomatic spots on her left leg. She was otherwise healthy. On examination several purpuric patches up to 3 cm. in diameter were found on the flexure aspect of her left leg. Histological examination revealed lymphocytic infiltrate, with mild atypia, with red blood cell extravasation and hemosiderin deposition in the papillary dermis. The clinical and histological findings were compatible with the diagnosis of early stage purpuric mycosis fungoides (MF)...
October 2016: Harefuah
https://www.readbyqxmd.com/read/28526486/plasma-concentrations-of-transdermal-fentanyl-and-buprenorphine-in-pigs-sus-scrofa-domesticus
#6
Suzanne Osorio Lujan, Walid Habre, Youssef Daali, Zhaoxin Pan, Peter W Kronen
OBJECTIVE: To determine the absorption characteristics of fentanyl and buprenorphine administered transdermally in swine. STUDY DESIGN: A randomized comparative experimental trial. ANIMALS: Twenty-four Yorkshire gilts weighing 27.8±2.2 kg (mean±standard deviation). METHODS: Animals were randomly assigned to different doses of transdermal patches (TPs) of fentanyl (50 μg hour(-1), 75 μg hour(-1) and 100 μg hour(-1)) or buprenorphine (35 μg hour(-1) and 70 μg hour(-1)), once or twice...
January 11, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28522416/implantation-assays-using-the-integument-of-early-stage-bombyx-larvae-insights-into-the-mechanisms-underlying-the-acquisition-of-competence-for-metamorphosis
#7
Tomohiro Inui, Takaaki Daimon
It is widely accepted that the anti-metamorphic action of insect juvenile hormones (JHs) is required to inhibit larval-pupal metamorphosis. However, recent studies using RNAi or knockout techniques reveal that larval status may be maintained independently of JHs during the early larval stages. To investigate why larvae of very early instars do not have competence to metamorphose and how they acquire this competence through larval development, we revisited the classic experiments of Piepho (ca. 1930s) and performed implantation assays using the integument of very young larvae of the silkworm, Bombyx mori...
May 15, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28520443/effective-interactions-and-colloidal-stability-of-bovine-%C3%AE-globulin-in-solution
#8
Stefano Da Vela, Felix Roosen-Runge, Maximilian W A Skoda, Robert M J Jacobs, Tilo Seydel, Henrich Frielinghaus, Michael Sztucki, Ralf Schweins, Fajun Zhang, Frank Schreiber
Interactions and phase behavior of γ-globulins are of fundamental interest in biophysical and pharmaceutical research, as these are among the most abundant proteins in blood plasma. In this work, we report the characterization of the oligomeric state of bovine γ-globulin, the effective protein-protein interactions and the colloidal stability in aqueous solution as a function of protein concentration and ionic strength. Classical biochemical techniques, such as size exclusion chromatography (SEC) and gel electrophoresis together with small angle X-ray and neutron scattering (SAXS/SANS) were employed for this study...
May 18, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28504775/efficacy-of-epidural-blood-patches-for-spontaneous-low-pressure-headaches-a-case-series
#9
S Ansel, A Rae, A Tyagi
Patients with a spontaneous cerebrospinal fluid leak, normally at a spinal level, typically present with low-pressure headache. In refractory cases, an epidural blood patch may be attempted. We aimed to assess the efficacy of lumbar epidural blood patching in spontaneous, low-pressure headaches. Methods We retrospectively analysed notes of patients who had an epidural blood patch performed for spontaneous low-pressure headaches in a single centre. Information regarding demographics, radiology and clinic follow-up was extracted from an electronic patient record system...
December 2016: Journal of the Royal College of Physicians of Edinburgh
https://www.readbyqxmd.com/read/28496169/exploring-the-link-between-cadmium-and-psoriasis-in-a-nationally-representative-sample
#10
Fang-Yih Liaw, Wei-Liang Chen, Tung-Wei Kao, Yaw-Wen Chang, Ching-Fu Huang
Psoriasis, a skin inflammatory disease, originates from dysregulated interactions of the immune system. Cadmium, an environment pollutant, increases the levels of inflammation markers and influences the immune system. To clarify the relationship between cadmium and psoriasis, 5,927 participants, ≥20 years, in the National Health and Nutrition Examination Survey (NHANES) 2003-2006 were studied. Psoriasis severity was assessed using self-reported dermatology questionnaires. Cadmium was measured using blood chemistry...
May 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28490677/dietary-human-milk-oligosaccharides-but-not-prebiotic-oligosaccharides-increase-circulating-natural-killer-cell-and-mesenteric-lymph-node-memory-t-cell-populations-in-noninfected-and-rotavirus-infected-neonatal-piglets
#11
Sarah S Comstock, Min Li, Mei Wang, Marcia H Monaco, Theresa B Kuhlenschmidt, Mark S Kuhlenschmidt, Sharon M Donovan
Background: Human milk oligosaccharides (HMOs) have antimicrobial and immunomodulatory actions. It has previously been reported that these oligosaccharides contribute to the reduced duration of rotavirus-induced diarrhea in pigs.Objective: We measured the effects of HMOs and prebiotic oligosaccharides on immune cell populations from noninfected and rotavirus-infected pigs. We hypothesized that dietary HMOs would modulate systemic and gastrointestinal immunity.Methods: Colostrum-deprived newborn pigs were fed formula, formula with 4 g HMOs/L (2'-fucosyllactose, lacto-N-neotetraose, 6'-sialyllactose, 3'-sialyllactose, and free sialic acid), or formula with 3...
May 10, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28488018/retrieving-challenging-vessel-connections-in-retinal-images-by-line-co-occurrence-statistics
#12
Samaneh Abbasi-Sureshjani, Jiong Zhang, Remco Duits, Bart Ter Haar Romeny
Natural images contain often curvilinear structures, which might be disconnected, or partly occluded. Recovering the missing connection of disconnected structures is an open issue and needs appropriate geometric reasoning. We propose to find line co-occurrence statistics from the centerlines of blood vessels in retinal images and show its remarkable similarity to a well-known probabilistic model for the connectivity pattern in the primary visual cortex. Furthermore, the probabilistic model is trained from the data via statistics and used for automated grouping of interrupted vessels in a spectral clustering based approach...
May 9, 2017: Biological Cybernetics
https://www.readbyqxmd.com/read/28481715/efflux-proteins-at-the-blood-brain-barrier-review-and-bioinformatics-analysis
#13
Massoud Saidijam, Fatemeh Karimi Dermani, Sareh Sohrabi, Simon G Patching
1. Efflux proteins at the blood-brain barrier provide a mechanism for export of waste products of normal metabolism from the brain and help to maintain brain homeostasis. They also prevent entry into the brain of a wide range of potentially harmful compounds such as drugs and xenobiotics. 2. Conversely, efflux proteins also hinder delivery of therapeutic drugs to the brain and central nervous system used to treat brain tumours and neurological disorders. For bypassing efflux proteins, a comprehensive understanding of their structures, functions and molecular mechanisms is necessary, along with new strategies and technologies for delivery of drugs across the blood-brain barrier...
May 8, 2017: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/28475214/the-angiotensin-ii-receptor-type-1b-is-the-primary-sensor-of-intraluminal-pressure-in-cerebral-artery-smooth-muscle-cells
#14
Paulo W Pires, Eun-A Ko, Harry A T Pritchard, Michael Rudokas, Evan Yamasaki, Scott Earley
Myogenic vasoconstriction, which reflects the intrinsic ability of smooth muscle cells to contract in response to increases in intraluminal pressure, is critically important for the autoregulation of blood flow. In SMC from cerebral arteries, increasing intraluminal pressure engages a signalling cascade that stimulates cation influx through transient receptor potential (TRP) melastatin 4 (TRPM4) channels to cause membrane depolarization and vasoconstriction. Substantial evidence indicates that the angiotensin II receptor type 1 (AT1 R) is inherently mechanosensitive and initiates this signalling pathway...
May 5, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28473772/lack-of-effects-of-metformin-and-aicar-chronic-infusion-on-the-development-of-hypertension-in-dahl-salt-sensitive-rats
#15
Tengis S Pavlov, Vladislav Levchenko, Daria V Ilatovskaya, Hui Li, Oleg Palygin, Nuria M Pastor-Soler, Kenneth R Hallows, Alexander Staruschenko
In the kidney, reabsorption via the epithelial sodium channel (ENaC) is involved in long-term blood pressure control. Previously we demonstrated that ENaC hyperactivity is associated with development of salt-sensitive (SS) hypertension in Dahl SS rats. AMP-activated kinase (AMPK), playing a role in cellular energy homeostasis, has been shown to decrease ENaC activity. Here, we tested whether metformin and AICAR, two drugs that activate AMPK, affect the development of salt-induced hypertension. High salt diet significantly increased mean arterial pressure (MAP) in Dahl SS rats...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28466552/greater-occipital-nerve-treatment-in-the-management-of-spontaneous-intracranial-hypotension-headache-a-case-report
#16
G Niraj, Peter Critchley, Mahesh Kodivalasa, Mohammed Dorgham
BACKGROUND: Clinical presentation of spontaneous intracranial hypotension headache (SIHH) has similarities with postdural puncture headache (PDPH). Recommended treatment for both conditions is an epidural blood patch. Successful outcomes following greater occipital nerve blocks have been reported in the management of PDPH. We present the first report of greater occipital nerve treatment in SIHH. METHODS: A 40-year-old male presented with a 2-year history of daily postural headaches having a significant impact on quality of life...
May 2, 2017: Headache
https://www.readbyqxmd.com/read/28465407/role-of-nrf2-signaling-in-the-regulation-of-vascular-bk-channel-beta-1-subunit-expression-and-bk-channel-function-in-high-fat-diet-induced-diabetic-mice
#17
Tong Lu, Xiaojing Sun, Yong Li, Qiang Chai, Xiao-Li Wang, Hon-Chi Lee
The large conductance Ca(2+)-activated K(+) (BK) channel β1 subunit (BK-β1) is a key modulator of BK channel electrophysiology and the downregulation of BK-β1 protein expression in vascular smooth muscle cells (SMCs) underlies diabetic vascular dysfunction. In this study, we hypothesized that the nuclear factor erythroid-2-related factor 2 (Nrf2) signaling pathway plays a significant role in the regulation of coronary BK channel function and vasodilation in high fat diet (HFD)-induced obese/diabetic mice...
May 2, 2017: Diabetes
https://www.readbyqxmd.com/read/28465180/application-of-isotope-exchange-based-mass-spectrometry-to-understand-the-mechanism-of-inhibition-of-sickle-hemoglobin-polymerization-upon-oxygenation
#18
Rajdeep Das, Amrita Mitra, Vijay Bhat, Amit Kumar Mandal
Sickle hemoglobin (HbS) polymerization initiates in the deoxy state with the binding of hydrophobic patch formed by the isopropyl group of βVal6 residue of a hemoglobin tetramer with the hydrophobic pocket of another tetramer, whose hydrophobic patch binds to the hydrophobic groove of a third molecule. Subsequent elongation of a single stranded polymer followed by the formation of a double strand and finally combination of seven such pairs of double strands results in a fourteen stranded fibrous polymer. Precipitation of this fiber inside the erythrocytes results in sickling of red blood cells...
April 29, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/28462125/helicobacter-pylori-and-cardiovascular-complications-a-mechanism-based-review-on-role-of-helicobacter-pylori-in-cardiovascular-diseases
#19
REVIEW
Prasad G Jamkhande, Surendra G Gattani, Shaikh Ayesha Farhat
Heart disease comprises a wide class of cardiovascular abnormalities, including ischemic heart disease, myocardial infarction, atherosclerosis, and coronary artery disease. It is the leading cause of death all over the world. Several traditional and novel risk factors, such as infectious and noninfectious agents, have been associated with heart disease. Out of these, Helicobacter pylori has been recently introduced as an important etiological factor for heart disease. Numerous seroepidemiological findings observed H...
December 2016: Integr Med Res
https://www.readbyqxmd.com/read/28460145/from-immediate-release-to-long-acting-drug-delivery-systems-what-do-they-mean-and-why-do-they-matter
#20
Laura G Leahy
Understanding the varied delivery systems of today's medications can not only simplify dosing schedules but also improve medication adherence, reduce adverse events and polypharmacy, and increase patients' overall quality of life. Whether a medication is noted as immediate, controlled, delayed, or extended release can influence patient adherence as well as tolerability of the drug. New and novel delivery systems, such as long-acting weekly formulations or biweekly and monthly injectable agents, can offer steady blood levels of the drug, avoiding the daily fluctuations that may lead to side effects...
May 1, 2017: Journal of Psychosocial Nursing and Mental Health Services
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