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https://www.readbyqxmd.com/read/28350969/mechanisms-of-spontaneous-pacing-sa-nodal-cells-neonatal-cardiomyocytes-and-human-stem-cell-derived-cardiomyocytes
#1
Martin Morad, Xiaohua Zhang
The sino-atrial node is the primary site from which the mammalian heart is paced, but the mechanisms underlying the pacemaking still remain clouded. It is generally believed that the hyperpolarization-activated current I<sub><i>f</i></sub>, encoded by Hyperpolarization-activated cyclic nucleotide-gated (HCN) genes, contributes significantly to pacing, which in tandem with inward current generated by efflux of Ca<sup>2+</sup> via the Na<sup>+</sup>-Ca<sup>2+</sup> exchanger (NCX), resulting from the released Ca<sup>2+</sup>, mediates the diastolic depolarization...
March 28, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28350917/in-vitro-fertilization-insurance-coverage-and-chances-of-a-live-birth
#2
Emily S Jungheim, Man Yee Mallory Leung, George A Macones, Randall R Odem, Lisa M Pollack, Barton H Hamilton
No abstract text is available yet for this article.
March 28, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28350853/impacts-of-120-years-of-fertilizer-addition-on-a-temperate-grassland-ecosystem
#3
Jonathan Kidd, Peter Manning, Janet Simkin, Simon Peacock, Elizabeth Stockdale
The widespread application of fertilizers has greatly influenced many processes and properties of agroecosystems, and agricultural fertilization is expected to increase even further in the future. To date, most research on fertilizer impacts has used short-term studies, which may be unrepresentative of long-term responses, thus hindering our capacity to predict long-term impacts. Here, we examined the effects of long-term fertilizer addition on key ecosystem properties in a long-term grassland experiment (Palace Leas Hay Meadow) in which farmyard manure (FYM) and inorganic fertilizer treatments have been applied consistently for 120 years in order to characterize the experimental site more fully and compare ecosystem responses with those observed at other long-term and short-term experiments...
2017: PloS One
https://www.readbyqxmd.com/read/28350702/dose-conversion-coefficients-based-on-taiwanese-reference-phantoms-and-monte-carlo-simulations-for-use-in-external-radiation-protection
#4
Shu-Jun Chang, Jui-Ting Hsu, Shih-Yen Hung, Yan-Lin Liu, Shiang-Huei Jiang, Jay Wu
Reference phantoms are widely applied to evaluate the radiation dose for external exposure. However, the frequently used reference phantoms are based on Caucasians. Dose estimation for Asians using a Caucasian phantom can result in significant errors. This study recruited 40 volunteers whose body sizes are close to the average Taiwanese population. Magnetic resonance imaging was performed to obtain the organ volume for construction of the Taiwanese reference man (TRM) and Taiwanese reference woman (TRW). The dose conversion coefficients (DCC) resulting from photo beams in anterior-posterior, posterior-anterior, right-lateral, left-lateral, and isotropic irradiation geometries were estimated...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350641/exercise-training-in-a-patient-with-a-left-ventricular-assist-device-and-large-aortic-valve-thrombus
#5
Mijiti Wuliya, Sandrine Peyrot, Costin Radu, Jean-François Deux, Habib Ben Elhaj, Nicolas Lellouche, Thibaud Damy, Soulef Guendouz, Barnabas Gellen
DETAILS OF THE CLINICAL CASE: An aortic valve thrombus (AVT) is a rare complication after HeartMate II implantation. In a 44-year-old man, a large AVT was discovered 6 weeks after implantation of a HeartMate II for severe dilated cardiomyopathy. The aortic valve was permanently closed. DISCUSSION: After a followup of 3 months without embolic events, the patient started a cardiac rehabilitation (CR) program involving aerobic exercise, resistance exercises, group gymnastics, and relaxation exercise, and completed the program without any complications, resulting in a significant functional benefit...
March 24, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28350464/fluorescence-determination-of-omethoate-based-on-dual-strategy-for-improving-sensitivity
#6
Cuiping Zhang, Bixia Lin, Yujuan Cao, Manli Guo, Ying Yu
Omethoate is a frequently-used organophosphorus pesticide, the establishment of a sensitive, selective and simple method to determine omethoate is very important for food safety. In this paper, dual-strategy was applied to improve the detection sensitivity of omethoate. The first strategy, graphene quantum dots (GQDs) were doped with nitrogen to increase the fluorescence quantum yield to 30%. By coupling N-GQDs with omethoate aptamer, N-GQDs-aptamer probe was synthesized. The fluorescence of N-GQDs-aptamer probe was turned off by graphene oxide (GO), but recovered by omethoate...
March 28, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28346802/metabolome-profiling-of-partial-and-fully-reprogrammed-induced-pluripotent-stem-cells
#7
Soon-Jung Park, Sang A Lee, Nutan Prasain, Daekyeong Bae, Hyunsu Kang, Taewon Ha, Jong Soo Kim, Ki-Sung Hong, Charlie Mantel, Sung-Hwan Moon, Hal E Broxmeyer, Man Ryul Lee
Acquisition of proper metabolomic fate is required to convert somatic cells toward fully reprogrammed pluripotent stem cells. The majority of induced pluripotent stem cells (iPSCs) are partially reprogrammed and have a transcriptome different from that of the pluripotent stem cells. The metabolomic profile and mitochondrial metabolic functions required to achieve full reprogramming of somatic cells to iPSC status have not yet been elucidated. Clarification of the metabolites underlying reprogramming mechanisms should enable further optimization to enhance the efficiency of obtaining fully reprogrammed iPSCs...
March 27, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28346648/glomus-faciale-tumors-a-report-of-3-cases-and-literature-review
#8
Sahar Nadimi, John P Leonetti, Sam J Marzo, Douglas E Anderson, Gulrez Mahmood, Derek Bumgarner
Our objectives in reporting this case series are to familiarize readers with the rare occurrence of paragangliomas originating along the facial nerve and to provide a literature review. We describe 3 such cases that occurred at our tertiary care academic medical center. Two women and 1 man presented with a tumor adjacent to the vertical segment of the facial nerve. The first patient, a 48-year-old woman, presented with what appeared to be a parotid tumor at the stylomastoid foramen; she underwent a parotidectomy, transmastoid facial nerve decompression, and a shave biopsy of the tumor...
March 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28346646/metastatic-chordoma-of-the-tongue-case-report
#9
Sultan Bişkin, Rabiye Uslu Erdemir, Sultan Şevik Eliçora, Sevim Aydınlı, Şükrü Oğuz Özdamar
Chordomas are rare bone tumors that arise from notochord remnants. They most commonly occur in the sacrum, but they also can be seen in the skull base, cervical spine, and thoracolumbar vertebrae. Chordomas account for 1 to 4% of all primary skeletal tumors. They are usually indolent, locally growing tumors. Distant metastasis has been reported in 3 to 48% of cases. When metastasis occurs, it is usually observed in the lung, bone, and liver. To the best of our knowledge, no case of a chordoma metastasis to the tongue has been previously reported in the literature...
March 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28346303/eccrine-syringofibroadenoma-in-association-with-acquired-epidermodysplasia-verruciformis
#10
Timothy Tan, Joan Guitart, Luzheng Lisa Liu, Joaquin C Brieva, Sapna Amin, Monica Rani, Pedram Gerami, Pedram Yazdan
A 75-year-old man with human immunodeficiency virus infection and numerous biopsy-proven warts for 10 years, refractory to cryosurgery, cimetidine, and topical imiquimod, presented with numerous pink to hypopigmented verrucous papules and plaques involving the face, trunk, buttocks, and groin. Laboratory evaluation revealed a CD4 T-cell count of 62 cells per microliter and human immunodeficiency virus viral load of <117 copies per milliliter. Biopsy of a plaque groin lesion was performed. Histopathology revealed vertically oriented anastomosing strands of basaloid epithelium arising from multiple points along the epidermis in a background fibrovascular stroma...
January 3, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28346259/igg4-related-ophthalmic-disease-presenting-as-choroidal-and-orbital-lesions
#11
William S Gange, Stephen M Holland, Felipe De Alba
PURPOSE: To report a case of IgG4-related ophthalmic disease (IgG4-ROD) which presented as choroidal and orbital lesions. METHODS: Case report. RESULTS: A 64-year-old man presented with left eye photopsias and a history of IgG4-related perirenal fibrosis. Fundoscopic examination showed multiple bilateral yellow choroidal lesions, and optical coherence tomography showed multiple choroidal lesions. Magnetic resonance imaging of the orbits showed an enhancing lesion present circumferential to the optic nerve, but greater medially, abutting the posterior surface of the left globe...
March 24, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28346224/mutant-%C3%AE-2-chimaerin-signals-via-bidirectional-ephrin-pathways-in-duane-retraction-syndrome
#12
Alicia A Nugent, Jong G Park, Yan Wei, Alan P Tenney, Nicole M Gilette, Michelle M DeLisle, Wai-Man Chan, Long Cheng, Elizabeth C Engle
Duane retraction syndrome (DRS) is the most common form of congenital paralytic strabismus in humans and can result from α2-chimaerin (CHN1) missense mutations. We report a knockin α2-chimaerin mouse (Chn1KI/KI) that models DRS. Whole embryo imaging of Chn1KI/KI mice revealed stalled abducens nerve growth and selective trochlear and first cervical spinal nerve guidance abnormalities. Stalled abducens nerve bundles did not reach the orbit, resulting in secondary aberrant misinnervation of the lateral rectus muscle by the oculomotor nerve...
March 27, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28345580/differential-roles-of-caspase-1-and-caspase-11-in-infection-and-inflammation
#13
Si Ming Man, Rajendra Karki, Benoit Briard, Amanda Burton, Sebastien Gingras, Stephane Pelletier, Thirumala-Devi Kanneganti
Caspase-1, also known as interleukin-1β (IL-1β)-converting enzyme (ICE), regulates antimicrobial host defense, tissue repair, tumorigenesis, metabolism and membrane biogenesis. On activation within an inflammasome complex, caspase-1 induces pyroptosis and converts pro-IL-1β and pro-IL-18 into their biologically active forms. "ICE(-/-)" or "Casp1(-/-)" mice generated using 129 embryonic stem cells carry a 129-associated inactivating passenger mutation on the caspase-11 locus, essentially making them deficient in both caspase-1 and caspase-11...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345133/second-primary-melanoma-on-a-patient-undergoing-vemurafenib-therapy-a-case-report
#14
Giuliana Onnis, Giuseppe Palmieri, Maria Antonietta Montesu, Rosanna Satta
BACKGROUND: Several side effects have been reported during treatment with vemurafenib, including multiple benign lesions and, less frequently, atypical melanocytic proliferations and second primary melanomas. METHODS: A 46-year-old man undergoing vemurafenib therapy for metastatic malignant melanoma was clinically and dermoscopically monitored using total-body mapping. RESULTS: During BRAF inhibitor (BRAFi) treatment, the patient developed atypical melanocytic lesions and particularly secondary primary melanoma...
March 26, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28345065/diabetic-ketoacidosis-as-the-presenting-manifestation-of-pancreatic-adenocarcinoma-with-cystic-features
#15
Tezcan Kaya, Sumeyye Korkmaz, Erdem Vargol, Alper Karacan, Hakan Cinemre
The common presenting symptoms of pancreatic cancer are abdominal pain, weight loss, and jaundice. Pancreatic adenocarcinoma presenting with diabetic ketoacidosis is a very rare emergent clinical condition. However, pancreatic ductal cystadenocarcinoma presenting with diabetic ketoacidosis was not reported. We describe a 60-year-old man with pancreatic cystadenocarcinoma presenting with diabetic ketoacidosis as the initial manifestation. It must be kept in mind that in diabetic ketoacidosis cases, the precipitating factor may be pancreatic ductal cystadenocarcinoma...
March 2017: Turkish Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28344951/a-case-of-littr%C3%A3-s-hernia-at-zinder-national-hospital-zinder-niger
#16
I Amadou Magagi, H Adamou, O Habou
The presence of a Meckel's diverticulum in a hernia sac is known as Littré's hernia. We report a case of Littré's hernia in an 18-year old young man because of the uncommon condition. An 18-year old young patient was admitted to the Emergency Surgical Department of Zinder National Hospital, Zinder, Niger with a painful inguinoscrotal swelling of three days duration. The diagnosis of strangulated right inguinoscrotal hernia was made. At surgery, a Meckel's diverticulum was found at the antimesenteric border of the ileum in the hernia sac, the bowel loop was not viable...
April 2016: Journal of the West African College of Surgeons
https://www.readbyqxmd.com/read/28344950/impalement-head-injury-with-a-spear
#17
B I Akhiwu, A S Adoga, O P Binitie, C C Ani, M Iweagwu, O Adetutu, T Ureme, D D George, P D Didamson, E Oseni-Momodu, B T Ugwu
Impalement injuries to the craniofacial region are uncommon due to the fact that the face is a smaller target in relation to the rest of the body. We report a case of a 26-year old man who was attacked on the face with a spear. He was promptly evaluated and resuscitated; the blade of the spear was successfully extracted under general anaesthesia. He was discharged home after 2 weeks hospitalization; he has been followed up for three months with good outcome.
April 2016: Journal of the West African College of Surgeons
https://www.readbyqxmd.com/read/28344899/a-multidisciplinary-approach-to-digital-mapping-of-dinosaurian-tracksites-in-the-lower-cretaceous-valanginian-barremian-broome-sandstone-of-the-dampier-peninsula-western-australia
#18
Anthony Romilio, Jorg M Hacker, Robert Zlot, George Poropat, Michael Bosse, Steven W Salisbury
The abundant dinosaurian tracksites of the Lower Cretaceous (Valanginian-Barremian) Broome Sandstone of the Dampier Peninsula, Western Australia, form an important part of the West Kimberley National Heritage Place. Previous attempts to document these tracksites using traditional mapping techniques (e.g., surface overlays, transects and gridlines combined with conventional photography) have been hindered by the non-trivial challenges associated with working in this area, including, but not limited to: (1) the remoteness of many of the tracksites; (2) the occurrence of the majority of the tracksites in the intertidal zone; (3) the size and complexity of many of the tracksites, with some extending over several square kilometres...
2017: PeerJ
https://www.readbyqxmd.com/read/28344887/pd-l1-galectin-9-and-cd8-tumor-infiltrating-lymphocytes-are-associated-with-survival-in-hepatocellular-carcinoma
#19
Kostandinos Sideras, Katharina Biermann, Joanne Verheij, Bart R Takkenberg, Shanta Mancham, Bettina E Hansen, Hannah M Schutz, Robert A de Man, Dave Sprengers, Sonja I Buschow, Maddy C M Verseput, Patrick P C Boor, Qiuwei Pan, Thomas M van Gulik, Turkan Terkivatan, Jan N M Ijzermans, Ulrich H W Beuers, Stefan Sleijfer, Marco J Bruno, Jaap Kwekkeboom
Novel systemic treatments for hepatocellular carcinoma (HCC) are strongly needed. Immunotherapy is a promising strategy that can induce specific antitumor immune responses. Understanding the mechanisms of immune resistance by HCC is crucial for development of suitable immunotherapeutics. We used immunohistochemistry on tissue-microarrays to examine the co-expression of the immune inhibiting molecules PD-L1, Galectin-9, HVEM and IDO, as well as tumor CD8(+) lymphocyte infiltration in HCC, in two independent cohorts of patients...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28344816/vibration-upshot-of-operating-mechanical-sewing-machine-an-insight-into-common-peroneal-nerve-conduction-study
#20
Prakash Kumar Yadav, Ram Lochan Yadav, Deepak Sharma, Dev Kumar Shah, Niraj Khatri Sapkota, Dilip Thakur, Nirmala Limbu, Md Nazrul Islam
BACKGROUND: Most of the people associated with tailoring occupation in Nepal are still using mechanical sewing machine as an alternative of new technology for tailoring. Common peroneal nerves of both right and left legs are exposed to strenuous and chronic stress exerted by vibration and paddling of mechanical sewing machine. METHODS: The study included 30 healthy male tailors and 30 healthy male individuals. Anthropometric variables as well as cardio respiratory variables were determined for each subject...
2017: Annals of Occupational and Environmental Medicine
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