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https://www.readbyqxmd.com/read/28820026/pilot-validation-of-an-individualised-pharmacokinetic-algorithm-for-protamine-dosing-after-systemic-heparinisation-for-cardiopulmonary-bypass
#1
Lachlan F Miles, Paolo Marchiori, Florian Falter
INTRODUCTION: This manuscript represents a pilot study assessing the feasibility of a single-compartment, individualised, pharmacokinetic algorithm for protamine dosing after cardiopulmonary bypass. METHODS: A pilot cohort study in a specialist NHS cardiothoracic hospital targeting patients undergoing elective cardiac surgery using cardiopulmonary bypass. Patients received protamine doses according to a pharmacokinetic algorithm (n = 30) or using an empirical, fixed-dose model (n = 30)...
September 2017: Perfusion
https://www.readbyqxmd.com/read/28818254/medical-treatment-strategies-to-reduce-perioperative-morbidity-and-mortality-after-carotid-surgery
#2
A Ross Naylor
There is a paucity of high-quality evidence regarding what constitutes "optimal medical therapy" for the purposes of reducing morbidity/mortality after carotid endarterectomy (CEA). All patients should be prescribed antiplatelet therapy. Low-dose aspirin (75 to 325 mg) should be continued throughout the perioperative period and there is no evidence that higher doses confer additional benefit. There is emerging evidence that early implementation of dual antiplatelet therapy in recently symptomatic patients (aspirin 75 mg plus clopidogrel 75 mg) can reduce recurrent cerebral events before CEA and that dual antiplatelet therapy will significantly reduce stroke due to early postoperative carotid thrombosis...
March 2017: Seminars in Vascular Surgery
https://www.readbyqxmd.com/read/28805098/assessment-of-the-permeability-and-toxicity-of-polymeric-nanocapsules-using-the-zebrafish-model
#3
Carmen Teijeiro-Valiño, Elena Yebra-Pimentel, Jorge Guerra-Varela, Noemi Csaba, María J Alonso, Laura Sánchez
AIM: To assess the capacity of a new drug delivery nanocapsule (NC) with a double shell of hyaluronic acid and protamine to overcome biological barriers using the zebrafish model. MATERIALS & METHODS: NCs were prepared by the solvent displacement method, tagged with fluorescent makers and physicochemically characterized. Toxicity was evaluated according to the Fish Embryo Acute Toxicity test, and permeability was tested by exposing zebrafish, with and without chorion, to the fluorescent NCs...
August 14, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28795045/evaluation-of-sperm-protamine-deficiency-and-apoptosis-in-infertile-men-with-idiopathic-teratozoospermia
#4
Fatemeh Dehghanpour, Nasim Tabibnejad, Farzaneh Fesahat, Fatemeh Yazdinejad, Ali Reza Talebi
OBJECTIVE: Sperm morphology plays an important role in infertility, especially in cases of defects in the heads of spermatozoa. Tapered-head or elongated-head spermatozoa are examples of morphological abnormalities. The aim of this study was to compare the semen parameters, levels of protamine deficiency, and frequency of apoptosis between patients with normozoospermia and those with teratozoospermia with tapered-head spermatozoa. METHODS: Fifty-two semen samples (27 patients with tapered-head sperm and 25 fertile men) were collected and semen analysis was performed according to the World Health Organization criteria for each sample...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28792170/consensus-on-basal-insulin-in-the-management-of-type-2-diabetes-which-when-and-how
#5
Samit Ghosal, Binayak Sinha, Anirban Majumder, Ashok Kumar Das, Awadhesh Kumar Singh, Biswajit Ghoshdastidar, Debasish Maji, Ghanshyam Goyal, Jagat Jyoti Mukherjee, Kalyan Kumar Gangopadhyay, Mathew John, Sanjay Chatterjee, Shalini Jaggi, Subir Ray, Sujoy Majumdar, Surendra Kumar Sharma
INTRODUCTION: Type 2 diabetes mellitus (T2DM) has attained epidemic proportions and continues to increase despite the availability of a number of oral antidiabetic medications and major advances made in insulin delivery since its discovery nearly a hundred years ago. One, amongst many other reasons responsible for the inability to achieve adequate glycaemic control in a substantial proportion of T2DM patients is the delayed initiation and inappropriate intensification of insulin treatment...
July 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28764988/argatroban-in-thrombocytopenic-patients-sensitized-to-circulating-protamine-heparin-complexes
#6
Patricia Pia Wadowski, Alessia Felli, Arno Schiferer, Simon Panzer, Philipp Opfermann, Martin Dworschak, Caroline Holaubek, Arezu Aliabadi-Zuckermann, Barbara Steinlechner
No abstract text is available yet for this article.
March 22, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28760108/retrospective-evaluation-of-glycemic-control-with-basal-bolus-or-neutral-protamine-hagedorn-insulin-regimens-in-patients-receiving-continuous-enteral-nutrition-therapy-in-medicine-wards
#7
Dema Hijaze, Auryan Szalat
Reasonable glycemic control is difficult to achieve in patients with diabetes mellitus (DM) receiving continuous enteral nutrition therapy (CENT). There are no solid evidence-based medicine guidelines regarding this issue in these patients. The purpose of this study was to determine if the use of a basal-bolus insulin regimen is more effective than neutral protamine Hagedorn (NPH) insulin alone in controlling blood glucose in non-critically ill patients with DM receiving CENT. We performed a retrospective, records-based review comparing basal-bolus with NPH insulin regimen in these patients, hospitalized in the internal medicine wards in our hospital...
August 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28748416/cryoprotective-effect-of-resveratrol-on-dna-damage-and-crucial-human-sperm-messenger-rnas-possibly-through-5-amp-activated-protein-kinase-activation
#8
Maryam Shabani Nashtaei, Saeid Nekoonam, Mohammad Naji, Shabnam Bakhshalizadeh, Fardin Amidi
This work aimed at investigating the effect of resveratrol on (1) DNA integrity and (2) fertilizing capacity of sperm by quantifying the presence of key paternal transcripts considered as markers for male fertility (protamine 1 [PRM1] and protamine 2 [PRM2]) and pregnancy success (adducin 1 alpha [ADD1]) in cryopreserved human spermatozoa through modulation of AMP-activated protein kinase (AMPK). The study populations was drawn from 22 normozoospermic healthy volunteers which were incubated with or without AMPK activator (resveratrol [RSV], 15 µM) or inhibitor (Compound C [CC], 30 µM) for 1 h and were then cryopreserved...
July 26, 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/28746233/preoperative-thromboelastometry-for-the-prediction-of-increased-chest-tube-output-in-cardiac-surgery-a-retrospective-study
#9
Waldemar Gozdzik, Barbara Adamik, Grzegorz Wysoczanski, Anna Gozdzik, Maciej Rachwalik, Tomasz Skalec, Andrzej Kübler
Bleeding following cardiac surgery is a serious event with potentially life-threatening consequences. Preoperative recognition of coagulation abnormalities and detection of cardiopulmonary bypass (CPB) related coagulopathy could aid in the start of preventive treatment strategies that minimize perioperative blood loss. Most algorithms that analyze thromboelastometry coagulation tests in elective cardiac surgery do not include test results performed before surgery. We evaluated preoperative rotational thromboelastometry test results for their ability to predict blood loss during and after cardiac surgery...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28744652/effects-of-chitosan-derivative-n-2-hydroxy-3-trimethylammonium-propyl-chloride-on-anticoagulant-activity-of-guinea-pig-plasma
#10
N N Drozd, B Ts Shagdarova, A V Il'ina, V P Varlamov
Intravenous injection of protamine sulfate or quarternized chitosan derivative to guinea pigs after injection of 70 aIIa U/kg non-fractionated heparin shortened plasma clotting time (shown by partial activated thromboplastin time, thrombin time, and prothrombin time). Intravenous injection of protamine sulfate or quarternized chitosan derivative to guinea pigs after injection of 1 mg/kg (100 aXa U/kg) low-molecular-weight heparin (clexane) led to shortening of plasma clotting time in the ReaClot Heparin test and to prolongation of plasma amidolytic activity in the factor Xa chromogenic substrate test...
July 26, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28744523/evaluation-of-intracellular-anion-superoxide-level-heat-shock-protein-a2-and-protamine-positive-spermatozoa-percentages-in-teratoasthenozoospermia
#11
Parvin Sabeti, Fardin Amidi, Seyed Mahdi Kalantar, Mohammad Ali Sedighi Gilani, Soheila Pourmasumi, Atefeh Najafi, Ali Reza Talebi
BACKGROUND: Teratoasthenozoospermia (TA) is a severe form of male infertility with no clear etiology. OBJECTIVE: To compare the level of intracellular anion superoxide (O2-), heat shock protein A2 (HSPA2) and protamine deficiencies in ejaculated spermatozoa between teratoasthenozoospermic and normozoospermic men. MATERIALS AND METHODS: In this case- control study, semen samples of 20 infertile men, with TA (with normal morphology lower than 4%_ and total motility lower than 40% ) as the case group and 20 normozoospermic fertile men as the control group were evaluated for intracellular O2(-) and HSPA2 by flow cytometry and protamine deficiency by Chromomycin A3 (CMA3) test...
May 2017: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/28743739/ip6k1-is-essential-for-chromatoid-body-formation-and-temporal-regulation-of-tnp2-and-prm2-expression-in-mouse-spermatids
#12
Aushaq Bashir Malla, Rashna Bhandari
Inositol hexakisphosphate kinases (IP6Ks) are enzymes that synthesise the inositol pyrophosphate 5-IP7, which is known to regulate several physiological processes. Deletion of IP6K1, but not other IP6K isoforms, causes sterility in male mice. Here, we present a detailed investigation of the specific function of IP6K1 in spermatogenesis. Within the mouse testis, IP6K1 is expressed at high levels in late stage pachytene spermatocytes and in round spermatids. We found IP6K1 to be a novel component of the chromatoid body, a cytoplasmic granule in round spermatids composed of RNA and RNA binding proteins, and noted that this structure is absent in Ip6k1(-/-) round spermatids...
July 25, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28741720/alteplase-for-acute-ischemic-stroke-after-heparin-reversal-with-protamine-a-case-report-and-review
#13
Gabriel V Fontaine, Shawn M Smith
BACKGROUND: Few patients presenting with acute ischemic stroke (AIS) are eligible for alteplase, especially those receiving ongoing anticoagulation. We describe the first reported case of a patient receiving full-dose intravenous (IV) alteplase for AIS after heparin reversal with protamine. CASE: A 73-year-old male presented with AIS. He was treated with IV heparin, tirofiban, loading-dose prasugrel, and aspirin prior to percutaneous coronary intervention (PCI) for placement of a right coronary artery stent...
July 25, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28741113/approaches-to-prevent-bleeding-associated-with-anticoagulants-current-status-and-recent-developments
#14
REVIEW
Manu Thomas Kalathottukaren, Charles A Haynes, Jayachandran N Kizhakkedathu
Anticoagulants are widely used for the prophylaxis and treatment of cardiovascular disorders and to prevent blood clotting during surgeries. However, the major limitation associated with anticoagulant therapy is bleeding; all the current anticoagulants do have a bleeding risk. The propensity to bleed is much higher among the elderly population and patients with renal insufficiency. Therefore, there is an utmost and urgent clinical need for a highly efficient, nontoxic antidote with excellent anticoagulant reversal activity...
July 24, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28738561/silver-triangular-nanoplates-as-an-high-efficiently-fret-donor-acceptor-of-upconversion-nanoparticles-for-ultrasensitive-turn-on-off-protamine-and-trypsin-sensor
#15
Hongyu Chen, Aijin Fang, Youyu Zhang, Shouzhuo Yao
Silver triangular nanoplates (STNPs) as a high efficient fluorescence quenching reagent of upconversion nanoparticles (UCNPs) was used to constract a novel label-free fluorescence nanosensor for ultrasensitive detection of protamine and trypsin based on fluorescence resonance energy transfer (FRET) between STNPs and UCNPs. In this assay, the negatively charged STNPs can bind with positively charged UCNPs through electrostatic interaction, and then quenched the fluorescence of UCNPs. When protamine was added to the mixture of UCNPs-STNPs, the STNPs interacted with protamine and then detached from the surface of UCNPs and aggregated, which result in the recovery of the fluorescence of UCNPs...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28736810/the-effects-of-bacterial-infection-on-human-sperm-nuclear-protamine-p1-p2-ratio-and-dna-integrity
#16
A Zeyad, M F Hamad, M E Hammadeh
The purpose of this study was to detect the effects of bacterial infection on human sperm nuclear protamines and DNA fragmentation. In this study, 120 semen samples were collected from unselected male partners of couples consulting for infertility in infertility and obstetrics clinic. All the samples were screened bacteriologically according to World Health Organization guidelines, and also sperm parameters and DNA fragmentation were evaluated. The concentrations of protamines P1 and P2 were quantified using acid urea acrylamide gel electrophoresis...
July 23, 2017: Andrologia
https://www.readbyqxmd.com/read/28712647/perinatal-exposure-to-2-2-4-4-tetrabromodiphenyl-ether-induces-testicular-toxicity-in-adult-rats
#17
Ahmed Khalil, Mikhail Parker, Sarah E Brown, Sebnem E Cevik, Lian W Guo, Jake Jensen, Alexandra Olmsted, Daneal Portman, Haotian Wu, Alexander Suvorov
Since 1965, polybrominated diphenyl ethers (PBDEs) have been used internationally as flame-retardant additives. PBDEs were recently withdrawn from commerce in North America and Europe due to their environmental persistence, bioaccumulative properties and endocrine-disrupting effects. Generations exposed perinatally to the highest environmental doses of PBDE account for one-fifth of the total United States population. While, toxicity of PBDE for the male reproductive system has been demonstrated in several human and animal studies, the long-lasting effects of perinatal exposures on male reproduction are still poorly understood...
July 13, 2017: Toxicology
https://www.readbyqxmd.com/read/28711916/polymorphisms-of-protamine-genes-contribute-to-male-infertility-susceptibility-in-the-chinese-han-population
#18
Weijun Jiang, Peiran Zhu, Jing Zhang, Qiuyue Wu, Weiwei Li, Shuaimei Liu, Mengxia Ni, Maomao Yu, Jin Cao, Yi Li, Yingxia Cui, Xinyi Xia
Protamine (PRM) plays important roles in the packaging of DNA within the sperm nucleus. To investigate the role of PRM1/2 and transition protein 1 (TNP1) polymorphisms in male infertility, 636 infertile men and 442 healthy individuals were recruited into this case-controlled study of the Chinese Han population, using MassARRAY technology to analyze genotypes. Our analysis showed that there were no significant differences between controls and infertile cases among the five single nucleotide polymorphisms identified in PRM1, PRM2 and TNP1 [rs737008 (G/A), rs2301365 (C/A), rs2070923 (C/A), rs1646022 (C/G) and rs62180545 (A/G)]...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28694462/transgenerational-inheritance-of-susceptibility-to-diabetes-induced-male-subfertility
#19
Gabriela Pavlinkova, Hasmik Margaryan, Eva Zatecka, Eliska Valaskova, Fatima Elzeinova, Alena Kubatova, Romana Bohuslavova, Jana Peknicova
Male infertility is a worldwide problem associated with genetic background, environmental factors, and diseases. One of the suspected contributing factors to male infertility is diabetes mellitus. We investigated the molecular and morphological changes in sperms and testicular tissue of diabetic males. The study was performed in streptozotocin-induced type 1 diabetes mouse model. Diabetes decreased sperm concentration and viability and increased sperm apoptosis. Changes in protamine 1/protamine 2 ratio indicated reduced sperm quality...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694333/epc1-tip60-mediated-histone-acetylation-facilitates-spermiogenesis-in-mice
#20
Yixin Dong, Kyo-Ichi Isono, Kazuyuki Ohbo, Takaho A Endo, Osamu Ohara, Mamiko Maekawa, Yoshiro Toyama, Chizuru Ito, Kiyotaka Toshimori, Kristian Helin, Narumi Ogonuki, Kimiko Inoue, Atsuo Ogura, Kazutsune Yamagata, Issay Kitabayashi, Haruhiko Koseki
Global histone hyperacetylation is suggested to play a critical role for replacement of histones by transition proteins and protamines to compact the genome during spermiogenesis. However, the underlying mechanisms for hyperacetylation-mediated histone replacement remains poorly understood. Here, we report that EPC1 and TIP60, two critical components of the mammalian Nucleosome acetyltransferase of H4 (NuA4) complexes, are co-expressed in male germ cells. Strikingly, genetic ablation of either Epc1 or Tip60 disrupts hyperacetylation and impairs histone replacement, in turn causing aberrant spermatid development...
July 10, 2017: Molecular and Cellular Biology
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