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physicology

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https://www.readbyqxmd.com/read/27666763/microrna-19a-3p-enhances-the-proliferation-and-insulin-secretion-while-it-inhibits-the-apoptosis-of-pancreatic-%C3%AE-%C3%A2-cells-via-the-inhibition-of-socs3
#1
Yuan Li, Tianyou Luo, Liang Wang, Jing Wu, Shixin Guo
MicroRNAs (miRNAs or miRs), a group of small non-coding RNAs, have been demonstrated to play key roles in various physicological processes and diseases, including diabetes, the most common metabolic disorder. However, the underlying mechanisms remains largely unknown. In this study, we aimed to investigate the role of miR‑19a‑3p in diabetes. The results of RT-qPCR demonstrated that the level of miR‑19a‑3p was significantly decreased in the diabetic patients, and that the decreased miR‑50a-5p level was significantly associated with a high concentration of blood glucose...
September 23, 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/27434742/modeling-human-exposure-to-indoor-contaminants-external-source-to-body-tissues
#2
Eva M Webster, Hua Qian, Donald Mackay, Rebecca D Christensen, Britta Tietjen, Rosemary Zaleski
Information on human indoor exposure is necessary to assess the potential risk to individuals from many chemicals of interest. Dynamic indoor and human physicologically based pharmacokinetic (PBPK) models of the distribution of nonionizing, organic chemical concentrations in indoor environments resulting in delivered tissue doses are developed, described and tested. The Indoor model successfully reproduced independently measured, reported time-dependent air concentrations of chloroform released during showering and of 2-butyoxyethanol following use of a volatile surface cleaner...
August 16, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/26977527/physicologically-based-toxicokinetic-models-of-tebuconazole-and-application-in-human-risk-assessment
#3
Svava Ósk Jónsdóttir, Trine Klein Reffstrup, Annette Petersen, Elsa Nielsen
A series of physiologically based toxicokinetic (PBTK) models for tebuconazole were developed in four species, rat, rabbit, rhesus monkey, and human. The developed models were analyzed with respect to the application of the models in higher tier human risk assessment, and the prospect of using such models in risk assessment of cumulative and aggregate exposure is discussed. Relatively simple and biologically sound models were developed using available experimental data as parameters for describing the physiology of the species, as well as the absorption, distribution, metabolism, and elimination (ADME) of tebuconazole...
May 16, 2016: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/23926521/modulation-of-cx43-and-gap-junctional-intercellular-communication-by-androstenedione-in-rat-polycystic-ovary-and-granulosa-cells-in-vitro
#4
Rabih Talhouk, Charbel Tarraf, Laila Kobrossy, Abdallah Shaito, Samer Bazzi, Dana Bazzoun, Marwan El-Sabban
BACKGROUND: Gap-junctional intercellular communication (GJIC) is implicated in physicological processes and it is vitally important for granulosa cell (GC) differentiation and oocyte growth. We investigated the expression of connexin 43 (Cx43), a gap junctional protein, in normal and androstenedione-induced polycystic ovary (PCO), the effects of androstenedione on Cx43 expression, GJIC and progesterone production in granulosa cells in vitro. METHODS: Isolated GCs from rat ovary were supplemented with FSH and dripped with EHS-matrix (EHS-drip) in culture media, were treated with physiological (10(-7) M) or pathological (10(-5) M) androstenedione concentrations to induce differentiation...
January 2012: Journal of Reproduction & Infertility
https://www.readbyqxmd.com/read/23271285/small-rna-interference-mediated-gene-silencing-of-trek-1-potassium-channel-in-cultured-astrocytes
#5
Xiao Wu, Ronghua Tang, Yang Liu, Jingjiao Song, Zhiyuan Yu, Wei Wang, Minjie Xie
This study was aimed to examine the effect of TREK-1 silencing on the function of astrocytes. Three 21-nucleotide small interfering RNA (siRNA) duplexes (siT1, siT2, siT3) targeting TREK-1 were constructed. Cy3-labeled dsRNA oligmers were used to determine the transfection efficiency in cultured astrocytes. TREK-1-specific siRNA duplexes (siT1, siT2, siT3) at the optimal concentration were transfected into cultured astrocytes, and the most efficient siRNA was identified by the method of immunocytochemical staining and Western blotting...
December 2012: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/23163110/analysis-of-cardiac-and-renal-endothelin-receptors-by-in-situ-hybridization-in-mice
#6
Nicolas Vignon-Zellweger, Jan Rahnenführer, Franz Theuring, Berthold Hocher
BACKGROUND: Endothelin-1 (ET-1) is a multifunctional peptide, which is implicated in the renal and cardiac physicology as well as in many pathologies of these systems. ET-1's actions take place after the activation of two receptors: ET(A) and ET(B). The expression of these receptors may be modulated during the pathologic process. The analysis of the distribution and level of expression of the receptors in animal models is therefore crucial. METHODS: We developed a protocol for non-radioactive in situ hybridization for the mRNA of the two endothelin receptors on paraffin-embedded tissue using digoxigenin-labeled RNA probes...
2012: Clinical Laboratory
https://www.readbyqxmd.com/read/22747073/preparation-and-characterization-of-lipid-vesicles-containing-uricase
#7
Q Y Tan, N Wang, H Yang, L Chen, H R Xiong, L K Zhang, J Liu, C J Zhao, J Q Zhang
The study described the development of lipid vesicles as colloidal carriers for uricase, an enzyme with low activity at physicological conditions and low stability in vitro and in vivo. The lipid vesicles containing uricase (UOXLVs) were prepared and the process parameters were optimized with the indexes of entrapment efficiency, polydispersion, particle size, and zeta potential. The storage stability of uricase in lipid vesicles was significantly increased compared to that of free uricase at 4°C. The stability to proteolytic digestion was also increased obviously by entrapping the uricase in the lipid vesicles...
January 2010: Drug Delivery
https://www.readbyqxmd.com/read/21585130/immunologic-and-psychosocial-status-in-chronic-fatigue-syndrome
#8
K Nas, R Cevik, S Batum, A J Sarac, S Acar, S Kalkanli
OBJECTIVE: The aim of the study was to investigate the immunologic functions and psychosocial status in patients with chronic fatigue syndrome (CFS). METHODS: Twenty-five patients with CFS diagnosed by the international CFS definition criteria and 20 age- and gender-matched healthy controls were recruited. Depression was assessed by Beck Depression Inventory (BDI) and health status was assessed by Nottingham Health Profile (NHP). Monoclonal antibodies (MAbs) were measured to identify the following NK cell subsets: CD3, CD4, CD8 and CD56 and cytokine measurements were performed for IL2r, IL6 and IL8 in both patients and control subjects...
2011: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/21147568/in-vivo-assessment-of-hemocompatibility-of-a-ventricular-assist-device-in-healthy-swine
#9
Catarina Sacristán, Carlos R Escobedo, Rafael Bojalil, Raúl A Izaguirre, Evelyn Cortina, Alberto Aranda, Jorge Catrip, Ma Del Carmen Lesprón, Rashidi Springall, Emilio Sacristán
OBJECTIVE: To assess the hemocompatible performance of a novel implantable pneumatic ventricular assist device (VAD, Innovamédica, México) in healthy swine. The aim of this pilot study was first, to determine if short-term VAD implantation elicited remarkable inflammatory response above that expected from surgical trauma; and second, to assess if heparinized or passivated VAD coatings, in combination with systemic anticoagulant or antiaggregant therapies, modified the VAD's hemocompatible performance...
April 2010: Archivos de Cardiología de México
https://www.readbyqxmd.com/read/21025360/recent-advances-in-the-physicology-of-vision
#10
H HARTRIDGE
No abstract text is available yet for this article.
April 27, 1946: British Medical Journal (1857-1980)
https://www.readbyqxmd.com/read/18754586/tight-binding-and-fluorescent-sensing-of-oxalate-in-water
#11
Lijun Tang, Jinhee Park, Hae-Jo Kim, Youngmee Kim, Sung Jin Kim, Jik Chin, Kwan Mook Kim
A dinuclear copper complex that binds tightly and selectively to oxalate over other dicarboxylates like malonate, succinate, and glutarate has been developed. This receptor can be used for fluorescent detection of oxalate in water at physicological pH by chemosensing ensemble approach. Crystal structure of oxalate bound to the receptor together with molecular mechanics and DFT computations provide insights into the tight and selective binding of the anion by the receptor.
September 24, 2008: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/14357048/-human-types-according-to-physicology-of-the-higher-nervous-function
#12
A JUS
No abstract text is available yet for this article.
January 24, 1955: Polski Tygodnik Lekarski
https://www.readbyqxmd.com/read/13287317/-interoceptive-reflexes-in-the-coordination-of-the-labor-process-i-physicological-function-of-baroreceptors-in-the-uterine-cervix
#13
S SURANYI, T KOVACS, G MOLNAR
No abstract text is available yet for this article.
November 1955: Magyar Nöorvosok Lapja
https://www.readbyqxmd.com/read/10699716/controlled-release-of-solid-reversed-micellar-solution-srms-suppositories-containing-metoclopramide-hcl
#14
COMPARATIVE STUDY
A Schneeweis, C C Müller-Goymann
The investigated drug delivery system is a solid-reversed-micellar-solution (SRMS). The composition of this solution is 70% Witepsol W35 and 30% (w/w) lecithin. 1% (w/w) metoclopramide-HCl (MCP) was solubilized in the SRMS. After melting and on contact with water or any physicological aqueous media the SRMS exhibits an application induced transformation into a semisolid system of liquid crystalline microstructure. The structure of the liquid crystal has been identified by polarized light microscopy as a lamellar mesophase...
March 10, 2000: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/8418856/macrophage-alpha-actinin-is-not-a-calcium-modulated-actin-binding-protein
#15
M Pacaud, M C Harricane
alpha-Actinin was purified from rabbit macrophages to apparent homogeneity by a procedure designed to remove other actin-binding proteins. Large bundles of filaments were formed when 1 molecule of alpha-actinin interacted with 10-12 actin monomers. This process involved the successive occupancy of two classes of actin-binding sites with different affinities. The apparent Kd of alpha-actinin for F-actin was unaffected by the addition of 25 microM free Ca2+. Analysis of the influence of increasing Ca2+ concentrations on alpha-actinin-F-actin interactions by low-speed sedimentation assays, low-shear viscosity, and electron microscopy indicated that Ca2+ had a small inhibitory effect in the approximate range of 50-1000 microM...
January 12, 1993: Biochemistry
https://www.readbyqxmd.com/read/7589330/characterization-of-histaminergic-h3-receptors-in-intraocular-tuberomammillary-transplants-containing-histaminergic-neurons
#16
H Bergman, G D Prell, C R Lupica, A C Granholm
This study was performed to investigate the physicological properties of histaminergic neurons in intraocular hypothalamic transplants. Pieces of posterolateral hypothalamus containing the tuberomammillary nucleus were dissected from Embryonic Day 17 rat fetuses and transplanted into the anterior chamber of the eye of adult rat hosts. The hypothalamic transplants were left to mature for 2-5 months, after which in vivo electrophysiological recordings were performed. Extracellular recordings revealed spontaneously active neurons in the grafts, with a mean (+/- SEM) firing rate of 2...
November 1995: Experimental Neurology
https://www.readbyqxmd.com/read/7539428/alpha-2-macroglobulin-mediated-clearance-of-proteases-from-the-plasma-of-the-american-horseshoe-crab-limulus-polyphemus
#17
R Melchior, J P Quigley, P B Armstrong
Because proteases free in the body are damaging to the tissues, animals have evolved various agents for their inactivation and clearance. Mammals, for instance, have a diverse array of active site protease inhibitors in the plasma. In addition, mammals have alpha 2-macroglobulin (alpha 2M), which binds active proteases, and the alpha 2M-protease complex is then cleared from the plasma by a receptor-mediated endocytotic process. alpha 2M is also present in the plasma of many invertebrates, and in the American horseshoe crab, Limulus polyphemus, it is the only protease inhibitor in the plasma...
June 2, 1995: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/6039788/effect-of-temperature-acclimation-on-porcine-physicological-responses-to-heat-stress-and-associated-properties-of-muscle
#18
P B Addis, H R Johnson, N W Thomas, M D Judge
No abstract text is available yet for this article.
May 1967: Journal of Animal Science
https://www.readbyqxmd.com/read/4428402/-methodological-and-clinico-physicological-aspects-of-the-study-of-static-lung-volumes-and-uniformity-of-ventilation
#19
A G Dembo, Iu M Shapkaĭts
No abstract text is available yet for this article.
1974: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/2632759/-limits-on-the-use-of-propylene-glycol-in-topical-preparations
#20
M F Bobin, M L Madarasz, M C Martini
The authors define some limits for useful concentrations of propylene glycol (P.G.) by determination of inhibition produced in cell respiration from (crushed) mouse liver and in human cutaneous fibroblastic proliferation. They conclude that P.G. is able to inhibit both these physicological mechanisms from concentration as weak as 5.5% and 2% respectively. They give a method for analytical determination of P.G. in cosmetic and pharmaceutical products using gas liquid chromatography. This method is useful for a wide range of concentrations...
November 1989: Journal de Pharmacie de Belgique
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