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https://www.readbyqxmd.com/read/28734018/influence-of-cryoprecipitate-factor-xiii-and-fibrinogen-concentrate-on-hyperfibrinolysis
#1
Melissa M Cushing, Meghann M Fitzgerald, Rebecca M Harris, Lars M Asmis, Thorsten Haas
BACKGROUND: Hyperfibrinolysis is a potentially life-threatening condition associated with poor clot integrity and excessive bleeding. Although antifibrinolytics are an effective treatment, more liberal use of these drugs may lead to a prothrombotic risk, and an earlier and potentially safer treatment option would be desirable. Hyperfibrinolysis has been shown to be attenuated by in vitro supplementation of purified human Factor (F)XIII concentrate. Cryoprecipitate represents an alternative source of FXIII and the only approved source of concentrated FXIII in some countries...
July 21, 2017: Transfusion
https://www.readbyqxmd.com/read/28613262/antimicrobial-activity-of-truncated-and-polyvalent-peptides-derived-from-the-fkcrrqwqwrmkkgla-sequence-against-escherichia-coli-atcc-25922-and-staphylococcus-aureus-atcc-25923
#2
Nataly de Jesús Huertas, Zuly Jenny Rivera Monroy, Ricardo Fierro Medina, Javier Eduardo García Castañeda
Peptides derived from LfcinB were designed and synthesized, and their antibacterial activity was tested against Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923. Specifically, a peptide library was constructed by systemically removing the flanking residues (N or C-terminal) of Lfcin 17-31 ((17)FKCRRWQWRMKKLGA(31)), maintaining in all peptides the (20)RRWQWR(25) sequence that corresponds to the minimal antimicrobial motif. For this research, also included were (i) a peptide containing an Ala instead of Cys ([Ala(19)]-LfcinB 17-31) and (ii) polyvalent peptides containing the RRWQWR sequence and a non-natural amino acid (aminocaproic acid)...
June 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28612231/epsilon-aminocaproic-acid-prevents-high-glucose-and-insulin-induced-invasiveness-in-mda-mb-231-breast-cancer-cells-modulating-the-plasminogen-activator-system
#3
Rubí Viedma-Rodríguez, María Guadalupe Martínez-Hernández, Luis Antonio Flores-López, Luis Arturo Baiza-Gutman
Obesity and type II diabetes mellitus have contributed to the increase of breast cancer incidence worldwide. High glucose concentration promotes the proliferation of metastatic cells, favoring the activation of the plasminogen/plasmin system, thus contributing to tumor progression. The efficient formation of plasmin is dependent on the binding of plasminogen to the cell surface. We studied the effect of ε-aminocaproic acid (EACA), an inhibitor of the binding of plasminogen to cell surface, on proliferation, migration, invasion, epithelial-mesenchymal transition (EMT), and plasminogen activation system, in metastatic MDA-MB-231 breast cancer cells grown in a high glucose microenvironment and treated with insulin...
June 13, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28608203/detection-and-characterization-of-bacterial-proteinases-using-zymography
#4
Madathiparambil G Madanan, Ambili Mechoor
Proteinases play a crucial role in invasion and pathogenesis of bacteria, especially the extracellular and membrane-bound forms. Analysis of these proteinases demands the isolation by retaining the enzymatic activity. The isolation procedures maintaining the native structure of the enzyme in its soluble form are also of extreme importance. The qualitative analyses of these proteinases are carried out by electrophoresis and zymography. Enzymatic characterization based on the effect of inhibitors and activators on gelatinase activity also can be assessed using this zymography...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28491013/peptides-with-6-aminohexanoic-acid-synthesis-and-evaluation-as-plasmin-inhibitors
#5
Maciej Purwin, Agnieszka Markowska, Irena Bruzgo, Tomasz Rusak, Arkadiusz Surażyński, Urszula Jaworowska, Krystyna Midura-Nowaczek
Fifteen new peptide derivatives of ɛ-aminocaproic acid (EACA) containing the known fragment -Ala-Phe-Lys- with an affinity for plasmin were synthesised in the present study. The synthesis was carried out a solid phase. The following compounds were synthesised: H-Phe-Lys-EACA-X, H-d-Ala-Phe-Lys-EACA-X, H-Ala-Phe-Lys-EACA-X, H-d-Ala-Phe-EACA-X and H-Ala-Phe-EACA-X, where X = OH, NH2 and NH-(CH2)5-NH2. All peptides, except for those containing the sequence H-Ala-Phe-EACA-X, displayed higher inhibitory activity against plasmin than EACA...
2017: International Journal of Peptide Research and Therapeutics
https://www.readbyqxmd.com/read/28469503/use-of-aminocaproic-acid-in-combination-with-extracorporeal-membrane-oxygenation-in-a-case-of-leptospirosis-pulmonary-hemorrhage-syndrome
#6
Miguel Pardinas, Rodrigo Mendirichaga, Gaurav Budhrani, Rajan Garg, Luis Rosario, Rene Rico, Anthony Panos, Horst Baier, Stefanie Krick
A 32-year-old man presented with a 10-day history of fever, chills, nausea, vomiting, myalgia, nonproductive cough, and worsening dyspnea after freshwater swimming in the Caribbean 1 week prior to presentation. Shortly after arrival at the hospital, the patient developed severe respiratory distress with massive hemoptysis. Based on serologic workup, he was diagnosed with leptospirosis pulmonary hemorrhage syndrome leading to diffuse alveolar hemorrhage, severe hypoxemic respiratory failure, and multiorgan failure...
2017: Clinical Medicine Insights. Circulatory, Respiratory and Pulmonary Medicine
https://www.readbyqxmd.com/read/28443086/complete-molecular-and-immunoprotective-characterization-of-babesia-microti-enolase
#7
Xiangye Liu, Chen Zheng, Xiaoge Gao, Jiaxu Chen, Kuiyang Zheng
The apicomplexan Babesia microti is the primary causative agent of human babesiosis, one of the most broadly distributed tick-borne diseases worldwide. B. microti undergoes a complex lifecycle within both the mammalian host and the tick vector, and employs several different specific molecular mechanisms to enter host cells. Enolase, the key glycolytic enzyme in intracellular glucose metabolism, can also be expressed on the parasite's outer surface, binds to human plasminogen, and coordinates apicomplexan parasite invasion of host cells, however, it lacks sorting sequences or lipoprotein anchor sites...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28414905/application-of-an-acyl-coa-ligase-from-streptomyces-aizunensis-for-lactam-biosynthesis
#8
Jingwei Zhang, Jesus F Barajas, Mehmet Burdu, George Wang, Edward E Baidoo, Jay D Keasling
ε-Caprolactam and δ-valerolactam are important commodity chemicals used in the manufacture of nylons, with millions of tons produced annually. Biological production of these highly valued chemicals has been limited due to a lack of enzymes that cyclize ω-amino fatty acid precursors to corresponding lactams under ambient conditions. In this study, we demonstrated production of these chemicals using ORF26, an acyl-CoA ligase involved in the biosynthesis of ECO-02301 in Streptomyces aizunensis. This enzyme has a broad substrate spectrum and can cyclize 4-aminobutyric acid into γ-butyrolactam, 5-aminovaleric acid into δ-valerolactam and 6-aminocaproic acid into ε-caprolactam...
April 30, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28366637/the-safety-and-efficacy-of-lysine-analogues-in-cancer-patients-a-systematic-review-and-meta-analysis
#9
REVIEW
Joshua Montroy, Nicholas A Fergusson, Brian Hutton, Luke T Lavallée, Chris Morash, Ilias Cagiannos, Sonya Cnossen, Dean A Fergusson, Rodney H Breau
Lysine analogues are effective agents used for the reduction of blood loss and transfusion. However, the safety of lysine analogues in cancer patients remains in question due to a potential risk of venous thromboembolism (VTE). The objective of our review is to investigate safety and efficacy of lysine analogue administration in the patients with cancer. Medline, Embase, and The Cochrane Library were searched from inception to June, 2016. Reference lists of retrieved studies were searched to identify additional publications...
July 2017: Transfusion Medicine Reviews
https://www.readbyqxmd.com/read/28363354/management-of-major-bleeding-in-patients-with-atrial-fibrillation-treated-with-non-vitamin-k-antagonist-oral-anticoagulants-compared-with-warfarin-in-clinical-practice-from-phase-ii-of-the-outcomes-registry-for-better-informed-treatment-of-atrial-fibrillation
#10
Benjamin A Steinberg, DaJuanicia N Simon, Laine Thomas, Jack Ansell, Gregg C Fonarow, Bernard J Gersh, Peter R Kowey, Kenneth W Mahaffey, Eric D Peterson, Jonathan P Piccini
Non-vitamin K antagonist oral anticoagulants (NOACs) are effective at preventing stroke in patients with atrial fibrillation (AF). However, little is known about the management of bleeding in contemporary, clinical use of NOACs. We aimed to assess the frequency, management, and outcomes of major bleeding in the setting of community use of NOACs. Using the Outcomes Registry for Better Informed Treatment of Atrial Fibrillation II registry, we analyzed rates of International Society on Thrombosis and Haemostasis major bleeding and subsequent outcomes in patients treated with NOACs versus warfarin...
May 15, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28338491/perioperative-management-of-blood-loss-in-spine-surgery
#11
Rabia Qureshi, Varun Puvanesarajah, Amit Jain, Hamid Hassanzadeh
Spine procedures are associated with high rates of blood loss which can result in a greater need for transfusions. Repeated exposure to blood products is associated with risks and adverse reactions such as transfusion-related acute lung injury, fluid shifting, and infections. With the higher number of spine procedures and the increasing open surgery times associated with difficult procedures, excessive blood loss has become more prevalent. Perioperative methods have been established to combat the excessive blood loss and decrease the need for blood products...
March 23, 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28338025/preventing-perioperative-bleeding-in-patients-with-inherited-bleeding-disorders
#12
Colin Watterson, Nicholas Beacher
Data sourcesCochrane Cystic Fibrosis and Genetic Disorders Group's Coagulopathies Trials Register, a regularly updated database informed by trials identified within electronic databases including MEDLINE. Further defined searches were undertaken in PubMed, Embase, The Cochrane Library, ClinicalTrials.gov and WHO International Clinical Trials Registry Platform. Additional hand searching of relevant journals and books of conference proceedings was undertaken.Study selectionRandomised and quasi-randomised controlled trials in people of all ages with haemophilia or VWD undergoing oral or dental procedures using antifibrinolytic agents (tranexamic acid (TXA) or epsilon aminocaproic acid (EACA)) to prevent perioperative bleeding compared to no intervention with or without placebo...
March 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28304315/using-antifibrinolytics-in-the-peripartum-period-concern-for-a-hypercoagulable-effect
#13
H K Ahmadzia, E L Lockhart, S M Thomas, I J Welsby, M R Hoffman, A H James, A P Murtha, G K Swamy, C A Grotegut
INTRODUCTION: Although antifibrinolytic agents are used to prevent and treat hemorrhage, there are concerns about a potential increased risk for peripartum venous thromboembolism. We sought to determine the impact of tranexamic acid and ɛ-aminocaproic acid on in vitro clotting properties in pregnancy. METHODS: Blood samples were obtained from healthy pregnant, obese, and preeclamptic pregnant women (n = 10 in each group) prior to delivery as well as from healthy non-pregnant controls (n = 10)...
2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28273495/-99m-tc-labeling-and-evaluation-of-a-hynic-modified-small-molecular-inhibitor-of-prostate-specific-membrane-antigen
#14
Xiaoping Xu, Jianping Zhang, Silong Hu, Simin He, Xiao Bao, Guang Ma, Jianmin Luo, Jingyi Cheng, Yingjian Zhang
INTRODUCTION: Prostate-specific membrane antigen (PSMA) is a well-established target in the development of radiopharmaceuticals for the diagnosis and therapy of prostate cancer (PCa). In this study, we evaluated a novel (99m)Tc-labeled small molecular inhibitor of PSMA. METHODS: This new small-molecular inhibitor of PSMA, 6-hydrazinonicotinate-Aminocaproic acid-Lysine-Urea-Glutamate (HYNIC-ALUG) was radiolabeled by (99m)Tc and was evaluated both in vitro and in vivo using PCa models (PC-3 and LNCaP)...
May 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28263046/seizures-associated-with-tranexamic-acid-for-cardiac-surgery-a-meta-analysis-of-randomized-and-non-randomized-studies
#15
Hisato Takagi, Tomo Ando, Takuya Umemoto
INTRODUCTION: The aim of this meta-analysis was to assess whether tranexamic acid (TXA) therapy for adult cardiac surgery is associated with an increase in the risk of seizures, and we performed a meta-analysis of randomized controlled trials (RCTs) and non-randomized observational studies. EVIDENCE ACQUISITION: MEDLINE and EMBASE were searched through December 2016 using PubMed and OVID. Eligible studies were RCTs and non-randomized observational studies on TXA versus control (no TXA, placebo, or active control such as low-dose TXA, aprotinin, and epsilon aminocaproic acid) enrolling adult patients undergoing cardiac surgery and reporting the postoperative incidence of seizures as an outcome...
August 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28211198/safety-of-antifibrinolytics-in-cranial-vault-reconstructive-surgery-a-report-from-the-pediatric-craniofacial-collaborative-group
#16
Susan M Goobie, Franklyn P Cladis, Chris D Glover, Henry Huang, Srijaya K Reddy, Allison M Fernandez, David Zurakowski, Paul A Stricker, Heike Gries
BACKGROUND: Antifibrinolytic therapy significantly decreases blood loss and transfusion in pediatric cranial vault reconstructive surgery; however, concern regarding the side effects profile limits clinical use. AIMS: The aim was to utilize the Pediatric Craniofacial Surgery Perioperative Registry database to identify the safety profile of antifibrinolytic therapy for cranial vault reconstructive surgery by reporting the incidence of adverse events as they relate to exposure to tranexamic acid and aminocaproic acid compared to no exposure to antifibrinolytics...
March 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28197273/clinical-and-surgical-strategies-for-avoiding-or-reducing-allogeneic-blood-transfusions
#17
Antonio Alceu Dos Santos, Jose Francisco Baumgratz, Jose Henrique Andrade Vila, Rodrigo Moreira Castro, Rodrigo Freire Bezerra
Blood transfusions have still been used as a standard therapy to treat severe anemia. Current evidences point to both excessive allogeneic blood consumption and decreased donations, which result in reduced stocks in blood banks. Several studies have increasingly suggested a more restrictive transfusion practice for blood products. Currently, a number of autologous blood conservation protocols in surgeries have been noted. We report a case of severe anemia with 2.9 g/dL hemoglobin, which was successfully handled without using the standard therapy to treat anemia with hemotransfusions...
April 2016: Cardiology Research
https://www.readbyqxmd.com/read/28183556/blood-loss-and-transfusion-requirements-with-epsilon-aminocaproic-acid-use-during-cranial-vault-reconstruction-surgery
#18
Mark E Thompson, Charles Saadeh, Phillip Watkins, Laszlo Nagy, Joshua Demke
OBJECTIVE: To determine whether epsilon-aminocaproic acid (EACA) load of 50 mg∙kg(-1) before skin incision, and infusion of 25 mg∙kg(-1)∙h(-1) until skin closure during cranial vault reconstruction (CVR) were associated with decreased estimated blood loss and transfusion requirements. BACKGROUND: Antifibrinolytic medications decrease bleeding and transfusion requirements during cardiothoracic and orthopedic surgeries with high blood loss, but practical reductions in blood loss and transfusion requirements have not been consistently realized in children undergoing CVR...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27957347/high-dose-prolonged-epsilon-aminocaproic-acid-infusion-and-recombinant-factor-vii-for-massive-postoperative-retroperitoneal-hemorrhage-following-splenectomy
#19
Alex T Lee, Christopher R Barnes, Shweta Jain, Ronald Pauldine
The antifibrinolytic agent ε-aminocaproic acid is used to decrease procedural blood loss in a variety of high risk surgeries. The utility of recombinant factor VII administration in massive hemorrhage has also been reported in a variety of settings, though the impact in a surgical context remains unclear. We describe the case of a patient who underwent massive open splenectomy and developed diffuse retroperitoneal bleeding on postoperative day one. Massive transfusion was initiated, but attempts to control hemorrhage with surgical and interventional radiology approaches were unsuccessful, as was recombinant factor VII administration...
2016: Case Reports in Anesthesiology
https://www.readbyqxmd.com/read/27895370/lower-red-cell-transfusion-rates-with-use-of-tranexamic-acid-in-single-stage-bilateral-total-knee-arthroplasty-a-retrospective-audit
#20
Muhammad Aziz, Salman Bin Mahmood, Riaz Hussain Lakdawala, Tashfeen Ahmad
Bilateral total knee arthroplasty (BTKA) patients may require blood transfusion which has its risks. Anti-fibrinolytic drugs such as aprotinin, aminocaproic acid and tranexamic acid (TXA) have reduced transfusion requirements in major surgery. This retrospective audit was performed to assess effectiveness of TXA in reducing blood transfusion rate in single-stage sequential BTKA cases operated by a single surgeon. Records of 91 patients given TXA and 80 controls who were operated before 2012 and not given TXA were reviewed...
October 2016: JPMA. the Journal of the Pakistan Medical Association
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