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Plasma and exchange

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https://www.readbyqxmd.com/read/28640577/laser-ablation-molecular-isotopic-spectrometry-for-molecules-formation-chemistry-in-fs-laser-ablated-plasmas
#1
Huaming Hou, Xianglei Mao, Vassilia Zorba, Richard E Russo
Recently, laser ablated molecular isotopic spectrometry (LAMIS) has expanded its capability to explore molecules formation mechanism in laser induced plasma in addition to isotope analysis. LAMIS is powerful tool for tracking the origination of atoms that involved in formation of investigated molecules by labeling atoms with its isotopic substitution. The evolutionary formation pathways of organic molecules, especially of C2 dimers and CN radicals, were frequently reported. However, very little is known about the formation pathways for metallic radicals and heterodimers in laser ablated plasma...
June 22, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28635961/hypoxia-induced-mobilization-of-nhe6-to-the-plasma-membrane-triggers-endosome-hyperacidification-and-chemoresistance
#2
Fabrice Lucien, Pierre-Paul Pelletier, Roxane R Lavoie, Jean-Michel Lacroix, Sébastien Roy, Jean-Luc Parent, Dominique Arsenault, Kelly Harper, Claire M Dubois
The pH-dependent partitioning of chemotherapeutic drugs is a fundamental yet understudied drug distribution mechanism that may underlie the low success rates of current approaches to counter multidrug resistance (MDR). This mechanism is influenced by the hypoxic tumour microenvironment and results in selective trapping of weakly basic drugs into acidified compartments such as the extracellular environment. Here we report that hypoxia not only leads to acidification of the tumour microenvironment but also induces endosome hyperacidification...
June 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28635356/simultaneous-abo-incompatible-living-donor-liver-transplantation-and-splenectomy-without-plasma-exchange-in-china-two-case-reports
#3
Guoyong Chen, Janjun Sun, Sidong Wei, Yongfeng Chen, Gaofeng Tang, Zhantao Xie, Huaen Xu, Janbin Chen, Huibo Zhao, Zhenhua Yuan, Weiwei Wang, Guangbo Liu, Bing Wang, Biao Niu
ABO-incompatible (ABO-i) living-donor liver transplantation (LDLT) is performed if an ABO-compatible graft cannot be obtained. However, a perfect desensitization protocol has not been established worldwide, especially for simultaneous ABO-i LDLT and splenectomy. We herein report two cases of ABO-i LDLT. To the best of our knowledge, this is the first case report of ABO-i LDLT in an adult patient in China. Splenectomy and T-cell-targeted immunosuppression (basiliximab) was used to overcome the blood group barrier in these recipients...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28633683/plasminogen-activator-inhibitor-1-is-regulated-through-dietary-fat-intake-and-heritability-studies-in-twins
#4
Anna Janina Engstler, Turid Frahnow, Michael Kruse, Andreas Friedrich Hermann Pfeiffer, Ina Bergheim
In different pathophysiological conditions plasminogen activator inhibitor-1 (PAI-1) plasma concentrations are elevated. As dietary patterns are considered to influence PAI-1 concentration, we aimed to determine active PAI-1 plasma concentrations and mRNA expression in adipose tissue before and after consumption of a high-fat diet (HFD) and the impact of additive genetic effects herein in humans. For 6 weeks, 46 healthy, non-obese pairs of twins (aged 18-70) received a normal nutritionally balanced diet (ND) followed by an isocaloric HFD for 6 weeks...
June 21, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28631391/myosin-substitution-rate-is-affected-by-the-amount-of-cytosolic-myosin-in-cultured-muscle-cells
#5
Koichi Ojima, Emi Ichimura, Yuya Yasukawa, Mika Oe, Susumu Muroya, Takahiro Suzuki, Jun-Ichi Wakamatsu, Takanori Nishimura
In striated muscles, approximately 300 myosin molecules form a single thick filament in myofibrils. Each myosin is continuously displaced by another myosin to maintain the thick filament structure. Our previous study using a fluorescence recovery after photobleaching (FRAP) technique showed that the myosin replacement rate is decreased by inhibition of protein synthesis, but myosin is still exchangeable. This result prompted us to examine whether myosin in the cytoplasm is involved in myosin replacement in myofibrils...
June 19, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28629353/lipid-emulsion-mitigates-impaired-pulmonary-function-induced-by-limb-ischemia-reperfusion-in-rats-through-attenuation-of-local-cellular-injury-and-the-subsequent-systemic-inflammatory
#6
Fangfang Xia, Yun Xia, Sisi Chen, Lulu Chen, Weijuan Zhu, Yuanqing Chen, Thomas J Papadimos, Xuzhong Xu, Le Liu
BACKGROUND: Limb ischemia/reperfusion causes inflammation and elicits oxidative stress that may lead to local tissue damage and remote organ such as lung injury. This study investigates pulmonary function after limb ischemia/reperfusion and the protective effect of a lipid emulsion (Intralipid). METHODS: Twenty-four rats were divided into three groups: sham operation group (group S), ischemia/reperfusion group (group IR), and lipid emulsion treatment group (group LE)...
June 19, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28626871/a-successful-living-donor-liver-re-transplantation-for-graft-failure-within-seven-days-due-to-acute-de-novo-donor-specific-anti-hla-antibody-mediated-rejection
#7
Yohei Yamada, Ken Hoshino, Teisaburo Mori, Miho Kawaida, Kiyotomo Abe, Hideo Ishihama, Takahiro Shimizu, Nobuhiro Takahashi, Kentaro Matsubara, Taizo Hibi, Yuta Abe, Hiroshi Yagi, Naoki Shimojima, Masahiro Shinoda, Minoru Kitago, Hideaki Obara, Yasushi Fuchimoto, Kaori Kameyama, Yuko Kitagawa, Tatsuo Kuroda
Growing evidence suggests a relationship between antibody-mediated rejection (AMR) and early graft failure due to a previously unknown etiology in liver transplantation (LTx). We herein report a three-year-old boy who developed rapid graft failure due to de novo donor-specific antibody (DSA)-driven AMR a week after living donor LTx, requiring a second transplant on the 10th day after the first LTx. The pathology of the first graft showed massive necrosis in zone 3 along with positive C4d and inflammatory cell infiltrates in portal areas...
June 19, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28622752/microvascular-fluid-exchange-during-cpb-with-deep-hypothermia-circulatory-arrest-or-low-flow
#8
Bjørg Elvevoll, Paul Husby, Venny L Kvalheim, Lodve Stangeland, Arve Mongstad, Øyvind S Svendsen
OBJECTIVE: Use of deep hypothermic low-flow (DHLF) cardiopulmonary bypass (CPB) has been associated with higher fluid loading than the use of deep hypothermia circulatory arrest (DHCA). We evaluated whether these perfusion strategies influenced fluid extravasation rates and edema generation differently per-operatively. MATERIALS AND METHODS: Twelve anesthetized pigs, randomly allocated to DHLF (n = 6) or DHCA (n = 6), underwent 2.5 hours CPB with cooling to 20°C for 30 minutes (min), followed by 30 min arrested circulation (DHCA) or 30 min low-flow circulation (DHLF) before 90 min rewarming to normothermia...
June 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28620697/calreticulin-localizes-to-plant-intra-extracellular-peripheries-of-highly-specialized-cells-involved-in-pollen-pistil-interactions
#9
Piotr Wasąg, Anna Suwińska, Przemysław Zakrzewski, Jakub Walczewski, Robert Lenartowski, Marta Lenartowska
Calcium (Ca(2+)) plays essential roles in generative reproduction of angiosperms, but the sites and mechanisms of Ca(2+) storage and mobilization during pollen-pistil interactions have not been fully defined. Both external and internal Ca(2+) stores are likely important during male gametophyte communication with the sporophytic and gametophytic cells within the pistil. Given that calreticulin (CRT), a Ca(2+)-buffering protein, is able to bind Ca(2+) reversibly, it can serve as a mobile store of easily releasable Ca(2+) (so called an exchangeable Ca(2+)) in eukaryotic cells...
June 15, 2017: Protoplasma
https://www.readbyqxmd.com/read/28619436/tumefactive-demyelinating-lesions-a-comprehensive-review
#10
REVIEW
Hussein Algahtani, Bader Shirah, Ali Alassiri
Tumefactive multiple sclerosis or tumefactive demyelinating lesion (TDL) is one of the rare variants of multiple sclerosis (MS) posing a diagnostic challenge and a therapeutic enigma since it is difficult to distinguish from a true central nervous system (CNS) neoplasm or other CNS lesions on magnetic resonance imaging (MRI). The prevalence of TDL is estimated to be 1-3/1000 cases of MS with an annual incidence of 0.3/100,000. This could be an underestimate due to unavailability of a global MS registry and under-reporting of this condition...
May 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/28618340/fast-and-efficient-zirconia-based-reversed-phase-chromatography-for-selective-determination-of-triptans-in-rat-plasma
#11
Sameh Ahmed, Noha N Atia
Selective and fast chromatographic method was essential for the determination of triptans, selective serotonin receptor (5-HT1) agonists, in biological specimens. However, selective chromatographic separation of these highly basic drugs is a challenging problem on silica-based stationary phases. Zirconia-based stationary phases have been introduced as an efficient alternative for silica-based columns offering unique stability, selectivity, and retention ability for various classes of drugs. Herein, a new selective, fast and reproducible high performance liquid chromatographic method (HPLC) was developed and validated for the determination of four triptans in plasma samples namely; Sumatriptan (SMT), Zolmitriptan (ZLT), Eletriptan (ELT) and Rizatriptan (RZT)...
June 7, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28618127/regional-citrate-anticoagulation-in-membrane-based-plasma-exchange-safety-efficacy-and-effect-on-calcium-balance
#12
Daniel Christiadi, Chari Mercado, Richard Singer
AIM: To assess the efficacy, safety and calcium balance of a membrane based regional citrate anticoagulation plasma exchange protocol METHODS: This was an observational, prospective, single center study of membrane separation plasma exchange using regional citrate anticoagulation. It was performed using a fixed dose pre-filter citrate infusion that was based on the plasma flow rate. Patients received a post filter calcium infusion which was modified during treatment based on systemic ionized calcium monitoring...
June 15, 2017: Nephrology
https://www.readbyqxmd.com/read/28617037/quantitative-determination-of-a-sirna-ad00370-in-rat-plasma-using-peptide-nucleic-acid-probe-and-hplc-with-fluorescence-detection
#13
Qingguo Tian, Juan Rogness, Min Meng, Zheng Li
AIM: Toxicokinetic and pharmacokinetic studies of therapeutic oligonucleotides require validated bioanalytical methods for sensitive and specific quantification of oligonucleotide drug candidates in biological samples. RESULTS: A peptide nucleic acid (PNA) hybridization-based HPLC-fluorescence assay was developed and validated for quantification of Arrowhead Pharmaceuticals' proprietary siRNA in rat plasma samples via hybridization and anion-exchange-HPLC (AEX-HPLC) with fluorescence detection...
June 15, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28615319/retinoschisin-is-linked-to-retinal-na-k-atpase-signaling-and-localization
#14
Karolina Plössl, Melanie Royer, Sarah Bernklau, Neslihan N Tavraz, Thomas Friedrich, Jens Wild, Bernhard H F Weber, Ulrike Friedrich
Mutations in the RS1 gene cause X-linked juvenile retinoschisis (XLRS), a hereditary retinal dystrophy. We have recently shown that retinoschisin, the protein encoded by RS1, regulates ERK signaling and apoptosis in retinal cells. In this study, we explored an influence of retinoschisin on the functionality of the Na/K-ATPase, its interaction partner at retinal plasma membranes. We show that retinoschisin binding requires the β2-subunit of the Na/K-ATPase while the α-subunit is exchangeable. Our investigations revealed no impact of retinoschisin on Na/K-ATPase mediated ATP hydrolysis and ion transport...
June 14, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28613436/the-incremental-cost-of-incompatible-living-donor-kidney-transplant-a-national-cohort-analysis
#15
David Axelrod, Krista L Lentine, Mark A Schnitzler, Xun Luo, Huiling Xiao, Babak J Orandi, Allan Massie, Jacqueline Garonzik-Wang, Mark D Stegall, Stanley C Jordan, Jose Oberholzer, Ty B Dunn, Lloyd E Ratner, Sandip Kapur, Ronald P Pelletier, John P Roberts, Marc L Melcher, Pooja Singh, Debra L Sudan, Marc P Posner, Jose M El-Amm, Ron Shapiro, Matthew Cooper, George S Lipkowitz, Michael A Rees, Christopher L Marsh, Bashir R Sankari, David A Gerber, Paul W Nelson, Jason Wellen, Adel Bozorgzadeh, A Osama Gaber, Robert A Montgomery, Dorry L Segev
Incompatible living donor kidney transplant (ILDKT) has been established as an effective option for end stage renal disease (ESRD) patients with willing but HLA incompatible live donors, reducing mortality and improving quality of life. Depending upon antibody titer, ILDKT can require highly resource intensive procedure including intravenous immunoglobulin, plasma exchange and/or cell depleting antibody treatment as well as protocol biopsies and DSA testing. This study sought to compare the cost and Medicare reimbursement, exclusive of organ acquisition payment, for ILDKT recipients (N=926) with varying antibody titers to matched compatible transplants (N=2762) performed between 2002-2011...
June 14, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28611164/fulminant-tumefactive-multiple-sclerosis-in-pregnancy
#16
Shabnam Pakneshan, Evanthia Bernitsas
A 35-year-old pregnant woman was admitted with acute onset of paresthesias and word finding difficulty. Initial MRI scan of the brain was suggestive of ischaemic event. During hospitalisation, she had a rapid course with worsening of her neurological deficit that prompted additional testing. Further investigations were consistent with tumefactive multiple sclerosis. After a poor initial response to intravenous steroids and plasma exchange, and discussion of all available therapeutic options, the patient decided to proceed with elective termination...
June 13, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28608569/membrane-based-therapeutic-plasma-exchange-mtpe-technical-and-clinical-experience
#17
Casey N Gashti, Daniel C Andreoli, Dipal Patel
Therapeutic plasma exchange (TPE) has long been utilized to manage a variety of immune-mediated diseases. The basic principle relies on removal of circulating pathogenic substances from the bloodstream. Methods of plasma separation include centrifuge (cTPE) and membrane (mTPE). Although mTPE has existed for a few decades, recent advances in developing highly permeable filters that are compatible with currently existing dialysis machines has opened a new frontier. Published data in the area of technical and clinical experience with mTPE is lacking...
June 13, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/28608527/perfect-storm-therapeutic-plasma-exchange-for-a-patient-with-thyroid-storm
#18
Andrea M McGonigle, Aaron A R Tobian, Jennifer L Zink, Karen E King
Thyroid storm is a potentially lethal complication of hyperthyroidism with increased thyroid hormones and exaggerated symptoms of thyrotoxicosis. First-line therapy includes methimazole (MMI) or propylthiouracil (PTU) to block production of thyroid hormones as a bridge toward definitive surgical treatment. Untreated thyroid storm has a mortality rate of up to 30%; this is particularly alarming when patients cannot tolerate or fail pharmacotherapy, especially if they cannot undergo thyroidectomy. Therapeutic plasma exchange (TPE) is an ASFA category III indication for thyroid storm, meaning the optimum role of this therapy is not established, and there are a limited number of cases in the literature...
June 13, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/28607779/thrombotic-microangiopathy-secondary-to-intravenous-abuse-of-opana%C3%A2-er
#19
Kamia Thakur, Vaibhav Agrawal, Ashley Kass, Lauren M Dimarino, R Patrick Dorion, Joseph Vadakara
Opana ER (oxymorphone) is an opioid drug available throughout the United States, and intravenous abuse of the crushed oral formulation has been associated with drug-induced thrombotic microangiopathy. In this abstract, we describe two young patients who lived together and used Opana ER intravenously. Both presented with microangiopathic hemolytic anemia that mimicked thrombotic thrombocytopenic purpura (TTP). Treating this condition poses a clinical challenge, as it is difficult to distinguish it from TTP. The role for plasma exchange is not clear but can be used while awaiting the results of the ADAMTS-13 activity, but ultimately supportive care with drug discontinuation is the recommended therapy of choice...
2017: Case Reports in Hematology
https://www.readbyqxmd.com/read/28605161/the-use-of-therapeutic-plasma-exchange-to-reduce-serum-bilirubin-in-a-dog-with-kernicterus
#20
Tricia Tovar, Sarah Deitschel, Christine Guenther
OBJECTIVE: To describe the use of a manual method of therapeutic plasma exchange to reduce total serum bilirubin, manage kernicterus, and halt progression of neurological dysfunction in a dog with immune-mediated hemolytic anemia (IMHA). CASE SUMMARY: A 5-year-old male neutered Lhasa Apso diagnosed with IMHA developed acute onset neurologic signs consistent with kernicterus. Manual therapeutic plasma exchange was performed in an attempt to reduce total serum bilirubin...
June 12, 2017: Journal of Veterinary Emergency and Critical Care
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