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Extreme physiology

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https://www.readbyqxmd.com/read/28938461/adipokines-and-their-receptor-are-widely-expressed-and-distinctly-regulated-by-the-metabolic-environment-in-the-prostate-of-male-mice-direct-role-under-normal-and-tumoral-conditions
#1
André Sarmento-Cabral, Fernando L-López, Raúl M Luque
Adipose tissue-derived adipokines (i.e. leptin/adiponectin/resistin) play important roles in the regulation of several pathophysiological processes through the activation of specific receptors. However, although adipokines and their receptors are widely distributed in many tissues and exhibit a clear modulation by the particular metabolic conditions (e.g. obesity and/or fasting), their expression, regulation, and putative action on normal prostate-glands (PGs; a hormone-dependent organ tightly regulated by the endocrine-metabolic milieu) is still to be defined...
August 9, 2017: Endocrinology
https://www.readbyqxmd.com/read/28934640/continuous-longitudinal-infusion-of-rhigf-1-rhigfbp-3-in-extremely-preterm-infants-evaluation-of-feasibility-in-a-phase-ii-study
#2
Ingrid Hansen-Pupp, Ann Hellström, Mohamed Hamdani, Adina Tocoian, Nerissa C Kreher, David Ley, Boubou Hallberg
OBJECTIVE: To evaluate the feasibility of continuous longitudinal intravenous infusion of recombinant human insulin-like growth factor-1/recombinant human insulin-like growth factor binding protein-3 (rhIGF-1/rhIGFBP-3) for prevention of retinopathy of prematurity and other complications in extremely preterm infants (<28weeks' gestational age), based on initial sections of a phase II randomized controlled trial. DESIGN: The phase II trial was designed in four sections (A-D); we report pharmacokinetic and adverse events (AEs) data pooled for Sections B and C...
August 31, 2017: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/28934173/using-upper-extremity-skin-temperatures-to-assess-thermal-comfort-in-office-buildings-in-changsha-china
#3
Zhibin Wu, Nianping Li, Haijiao Cui, Jinqing Peng, Haowen Chen, Penglong Liu
Existing thermal comfort field studies are mainly focused on the relationship between the indoor physical environment and the thermal comfort. In numerous chamber experiments, physiological parameters were adopted to assess thermal comfort, but the experiments' conclusions may not represent a realistic thermal environment due to the highly controlled thermal environment and few occupants. This paper focuses on determining the relationships between upper extremity skin temperatures (i.e., finger, wrist, hand and forearm) and the indoor thermal comfort...
September 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28933808/pediatric-orthopedic-injuries-evidence-based-management-in-the-emergency-department-digest
#4
Jamie Lien, Kathryn H Pade
Upper and lower extremity injuries are common in children, with an overall risk of fracture estimated at just under 1 in 5 children. Pediatric bone anatomy and physiology produce age specific injury patterns and conditions that are unique to children, which can make accurate diagnosis difficult for emergency clinicians. This issue reviews the etiology and pathophysiology of child-specific fractures, as well as common injuries of the upper and lower extremities. Evidence-based recommendations for management of pediatric fractures, including appropriate diagnostic studies and treatment, are also discussed...
September 22, 2017: Pediatric Emergency Medicine Practice
https://www.readbyqxmd.com/read/28931575/case-report-of-clitoral-hypertrophy-in-2-extremely-premature-girls-with-an-ovarian-cyst
#5
Anne-Laure Nerré, Pierre Bétrémieux, Sylvie Nivot-Adamiak
Neonatal clitoromegaly is mainly attributed to in utero androgen exposure secondary to congenital adrenal hyperplasia. We report on 2 extremely premature girls with clitoromegaly, increased androgen levels, no salt wasting syndrome, and ovarian cyst. In case 1, the cyst liquid was aspired during ovarian hernia surgery and revealed high androgen levels. After aspiration, serum androgen levels decreased, as did clitoral size. In case 2, an ovarian cyst was seen on pelvic ultrasound. Aspiration was not indicated...
September 20, 2017: Pediatrics
https://www.readbyqxmd.com/read/28930381/intraocular-pressure-and-big-bubble-diameter-in-deep-anterior-lamellar-keratoplasty-an-ex-vivo-microscope-integrated-oct-with-heads-up-display-study
#6
Paramjit K Bhullar, Oscar M Carrasco-Zevallos, Alexandria Dandridge, Neel D Pasricha, Brenton Keller, Liangbo Shen, Joseph A Izatt, Cynthia A Toth, Anthony N Kuo
PURPOSE: To investigate the relationship between intraocular pressure (IOP) and big bubble (BB) formation in a model of deep anterior lamellar keratoplasty (DALK). DESIGN: Ex-vivo. METHODS: Corneoscleral buttons from human donors were loaded onto an artificial anterior chamber connected to a column of balanced salt solution. A surgeon-in-training learned to perform DALK via the BB technique using swept-source microscope-integrated optical coherence tomography (SS-MIOCT) with heads-up display (HUD)...
September 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28928613/clarifying-the-anatomy-and-physiology-of-totally-anomalous-systemic-venous-connection
#7
REVIEW
Saurabh Kumar Gupta, Rajnish Juneja, Robert H Anderson, Gurpreet S Gulati, Velayoudam Devagorou
The description of totally anomalous systemic venous connection is limited to case reports. In this review, we seek to clarify anatomic, physiologic, and hemodynamic aspects of this extremely rare anomaly. We also present findings of two patients in whom connection of all the systemic veins was anomalous. In the first patient, with usual atrial arrangement, all systemic veins, including the coronary sinus, were connected anomalously to the morphologically left atrium. Limited left-to-right shunt across an atrial septal defect provided the only source of blood flow to the lungs...
September 2017: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/28928020/selenium-induces-the-demethylation-of-mercury-in-marine-fish
#8
Xun Wang, Wen-Xiong Wang
The antagonistic effect of selenium (Se) on mercury (Hg) toxicity has been known for decades. Earlier studies mainly focused on Hg-Se interaction based on biokinetics and bioaccumulation, but the influences of Se on in vivo biotransformation of methylmercury (MeHg) have not been well understood. We conducted a 42-day exposure study to investigate the dynamic changes of MeHg and its primary degradation product - inorganic mercury (IHg) - in different organs of black seabream (Acanthopagrus schlegeli) exposed to different dietary Se levels...
September 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28926067/3-aminoperylene-and-ascorbate-in-aqueous-sds-one-green-laser-flash-%C3%A2-and-action-sustainably-detoxifying-a-recalcitrant-chloro-organic
#9
Tim Kohlmann, Robert Naumann, Christoph Kerzig, Martin Goez
The hydrated electron represents a "super-reductant" in water, providing 2.9 eV of reductive power, which suffices to decompose nonactivated aliphatic halides. We show that 3-amino-perylene in SDS micelles, when combined with the bioavailable ascorbate as an extramicellar sacrificial donor, sustainably produces hydrated electrons through photoredox catalysis with green light, from a metal-free system, and at near-physiological pH. Photoionization of the amine with a 532 nm laser yields an extremely long-lived radical cation as the by-product, and a subsequent reaction of the latter with the sacrificial donor across the micelle/water interface regenerates the catalyst...
September 19, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28925894/aerosol-a-novel-vehicle-in-pharmacotherapy-in-neonates
#10
Ronan MacLoughlin, Colin Telfer, Andy Clark, James Fink
BACKGROUND: Local delivery of drugs to the lungs of newborn infant represents an unmet need as no drugs have been approved. Potential benefits could be large. Development of aerosol for delivery of drugs to infants and newborn offers huge potential for better therapy. Newborn infants present unique challenges with regard to aerosol therapy. Efficient deposition of aerosolized medications on the neonate airway surface is hampered by anatomical features such as small airway geometries and physiological features such as exquisitely small tidal volumes, rapid breathing and unfavorable inhalation:exhalation ratios...
September 18, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28925409/metabolic-and-genomic-adaptations-to-winter-fattening-in-a-primate-species-the-grey-mouse-lemur-microcebus-murinus
#11
J Terrien, M Gaudubois, D Champeval, V Zaninotto, L Roger, J F Riou, F Aujard
AIM: To understand the mechanisms underlying the development of metabolic changes leading to obesity remains a major world health issue. Among such mechanisms, seasonality is quite underestimated although it corresponds to the manifestation of extreme metabolic flexibility in response to a changing environment. Nevertheless, the changes induced by such flexibility are far to be understood, especially at the level of insulin signaling, genomic stability or inflammation. METHODS: Here, we investigated the metabolic regulations displayed by a seasonal primate species, the grey mouse lemur (Microcebus murinus) that exhibits pronounced changes in body mass during the 6-month winter season: a fattening period followed by a spontaneous fat loss, without ever reaching pathological stages...
August 14, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28923599/-theranostic-role-of-bile-salt-capped-silver-nanoparticles-gall-stone-pigment-stone-disruption-and-anticancer-activity
#12
Ranju Prasad Mandal, Gunjan Mandal, Sudeshna Sarkar, Arindam Bhattacharyya, Swati De
Silver nanoparticles (AgNPs) have been synthesized in situ in micelles formed by the bile salt sodium deoxycholate (NaDC). The AgNPs exhibit "green" fluorescence. It has been shown in the present study that they can disrupt the components of gall stones/pigment stones. This unique ability of the AgNPs has been observed upon detailed study of the interaction between the endobiotic pigment bilirubin (BR) and bile salt (NaDC). In addition, these AgNPs show significant cytotoxicity towards the breast cancer cells (MCF-7)...
September 5, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28919307/a-journey-between-high-altitude-hypoxia-and-critical-patient-hypoxia-what-can-it-teach-us-about-compression-and-the-management-of-critical-disease
#13
M L Avellanas Chavala
High altitude sickness (hypobaric hypoxia) is a form of cellular hypoxia similar to that suffered by critically ill patients. The study of mountaineers exposed to extreme hypoxia offers the advantage of involving a relatively homogeneous and healthy population compared to those typically found in Intensive Care Units (ICUs), which are heterogeneous and generally less healthy. Knowledge of altitude physiology and pathology allows us to understanding how hypoxia affects critical patients. Comparable changes in mitochondrial biogenesis between both groups may reflect similar adaptive responses and suggest therapeutic interventions based on the protection or stimulation of such mitochondrial biogenesis...
September 14, 2017: Medicina Intensiva
https://www.readbyqxmd.com/read/28915324/facioscapulohumeral-muscular-dystrophy
#14
Alec M DeSimone, Anna Pakula, Angela Lek, Charles P Emerson
Facioscapulohumeral Muscular Dystrophy is a common form of muscular dystrophy that presents clinically with progressive weakness of the facial, scapular, and humeral muscles, with later involvement of the trunk and lower extremities. While typically inherited as autosomal dominant, facioscapulohumeral muscular dystrophy (FSHD) has a complex genetic and epigenetic etiology that has only recently been well described. The most prevalent form of the disease, FSHD1, is associated with the contraction of the D4Z4 microsatellite repeat array located on a permissive 4qA chromosome...
September 12, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28915305/trauma-epidemiology-of-women-in-puerto-rico-2002-2011
#15
Sofía Muns-Aponte, Omar García-Rodríguez, Ediel O Ramos-Meléndez, Pablo Rodríguez-Ortiz
OBJECTIVE: Recent literature has suggested that trauma is heterogenic and that physiological response to it differs between sexes. The study represented in this manuscript aimed to describe gender differences in the mortality rates of trauma patients at the Puerto Rico Trauma Hospital (PRTH). MATERIALS AND METHODS: This was a cross-sectional study performed at PRTH. A total of 14,874 injured patients admitted to the hospital from 2002 to 2011 were included in the sample and divided into 2 groups, based on sex...
September 2017: Puerto Rico Health Sciences Journal
https://www.readbyqxmd.com/read/28912742/perception-action-and-cognition-of-football-referees-in-extreme-temperatures-impact-on-decision-performance
#16
Nadia Gaoua, Rita F de Oliveira, Steve Hunter
Different professional domains require high levels of physical performance alongside fast and accurate decision-making. Construction workers, police officers, firefighters, elite sports men and women, the military and emergency medical professionals are often exposed to hostile environments with limited options for behavioral coping strategies. In this (mini) review we use football refereeing as an example to discuss the combined effect of intense physical activity and extreme temperatures on decision-making and suggest an explicative model...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28912505/biomimetic-silica-nanoparticles-prepared-by-a-combination-of-solid-phase-imprinting-and-ostwald-ripening
#17
Elena Piletska, Heersh Yawer, Francesco Canfarotta, Ewa Moczko, Katarzyna Smolinska-Kempisty, Stanislav S Piletsky, Antonio Guerreiro, Michael J Whitcombe, Sergey A Piletsky
Herein we describe the preparation of molecularly imprinted silica nanoparticles by Ostwald ripening in the presence of molecular templates immobilised on glass beads (the solid-phase). To achieve this, a seed material (12 nm diameter silica nanoparticles) was incubated in phosphate buffer in the presence of the solid-phase. Phosphate ions act as a catalyst in the ripening process which is driven by differences in surface energy between particles of different size, leading to the preferential growth of larger particles...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28910283/stochastic-principles-governing-alternative-splicing-of-rna
#18
Jianfei Hu, Eli Boritz, William Wylie, Daniel C Douek
The dominance of the major transcript isoform relative to other isoforms from the same gene generated by alternative splicing (AS) is essential to the maintenance of normal cellular physiology. However, the underlying principles that determine such dominance remain unknown. Here, we analyzed the physical AS process and found that it can be modeled by a stochastic minimization process, which causes the scaled expression levels of all transcript isoforms to follow the same Weibull extreme value distribution. Surprisingly, we also found a simple equation to describe the median frequency of transcript isoforms of different dominance...
September 14, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28900590/high-speed-atomic-force-microscopy-imaging-of-live-mammalian-cells
#19
REVIEW
Mikihiro Shibata, Hiroki Watanabe, Takayuki Uchihashi, Toshio Ando, Ryohei Yasuda
Direct imaging of morphological dynamics of live mammalian cells with nanometer resolution under physiological conditions is highly expected, but yet challenging. High-speed atomic force microscopy (HS-AFM) is a unique technique for capturing biomolecules at work under near physiological conditions. However, application of HS-AFM for imaging of live mammalian cells was hard to be accomplished because of collision between a huge mammalian cell and a cantilever during AFM scanning. Here, we review our recent improvements of HS-AFM for imaging of activities of live mammalian cells without significant damage to the cell...
2017: Biophysics and Physicobiology
https://www.readbyqxmd.com/read/28900256/genomic-and-transcriptomic-analysis-of-the-toluene-degrading-black-yeast-cladophialophora-immunda
#20
Barbara Blasi, Hakim Tafer, Christina Kustor, Caroline Poyntner, Ksenija Lopandic, Katja Sterflinger
Cladophialophora immunda is an ascomycotal species belonging to the group of the black yeasts. These fungi have a thick and melanized cell wall and other physiological adaptations that allows them to cope with several extreme physical and chemical conditions. Member of the group can colonize some of the most extremophilic environments on Earth. Cladophialophora immunda together with a few other species of the order Chaetothyriales show a special association with hydrocarbon polluted environments. The finding that the fungus is able to completely mineralize toluene makes it an interesting candidate for bioremediation purposes...
September 12, 2017: Scientific Reports
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