A collateral circulation in ischemic stroke accelerates recanalization due to lower clot compaction.

Collaterals improve recanalization in acute ischemic stroke patients treated with intravenous thrombolysis, but the mechanisms are poorly understood. To investigate it, an in vitro flow model of the middle cerebral artery was developed with or without collaterals. An occlusion was achieved using human blood clots.

High-Statistics Measurement of Collins and Sivers Asymmetries for Transversely Polarized Deuterons.

New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarized ^{6}LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 GeV muon beam at CERN, statistically balancing the existing data on transversely polarized proton targets. The first results from about two-thirds of the new data have total uncertainties smaller by up to a factor of three compared to the previous deuteron measurements.

Final COMPASS Results on the Transverse-Spin-Dependent Azimuthal Asymmetries in the Pion-Induced Drell-Yan Process.

The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190  GeV/c π^{-} beam impinging on a transversely polarized ammonia target. Combining the data of both years, we present final results on the amplitudes of five azimuthal modulations, which correspond to transverse-spin-dependent azimuthal asymmetries (TSAs) in the dimuon production cross section. Three of them probe the nucleon leading-twist Sivers, transversity, and pretzelosity transverse-momentum dependent (TMD) parton distribution functions (PDFs).

Luminal Surface Plasma Treatment of Closed Cylindrical Microchannels: A Tool toward the Creation of On-Chip Vascular Endothelium.

On-chip vascular microfluidic models provide a great tool to study aspects of cardiovascular diseases in vitro. To produce such models, polydimethylsiloxane (PDMS) has been the most widely used material. For biological applications, its hydrophobic surface has to be modified.

Computer-aided engineering of staphylokinase toward enhanced affinity and selectivity for plasmin.

Cardio- and cerebrovascular diseases are leading causes of death and disability, resulting in one of the highest socio-economic burdens of any disease type. The discovery of bacterial and human plasminogen activators and their use as thrombolytic drugs have revolutionized treatment of these pathologies. Fibrin-specific agents have an advantage over non-specific factors because of lower rates of deleterious side effects.

Effect of Apixaban Pretreatment on Alteplase-Induced Thrombolysis: An Study.

Benefit of thrombolytic therapy in patients with acute stroke, who are on anticoagulant treatment, is not well addressed. The aim of this study was to investigate whether apixaban can modify the thrombolytic efficacy of alteplase . Static and flow models and two variants of red blood cell (RBC) dominant clots, with and without apixaban, were used.

Triangle Singularity as the Origin of the a_{1}(1420).

The COMPASS Collaboration experiment recently discovered a new isovector resonancelike signal with axial-vector quantum numbers, the a_{1}(1420), decaying to f_{0}(980)π. With a mass too close to and a width smaller than the axial-vector ground state a_{1}(1260), it was immediately interpreted as a new light exotic meson, similar to the X, Y, Z states in the hidden-charm sector. We show that a resonancelike signal fully matching the experimental data is produced by the decay of the a_{1}(1260) resonance into K^{*}(→Kπ)K[over ¯] and subsequent rescattering through a triangle singularity into the coupled f_{0}(980)π channel.

Direct fluorogenic detection of palladium and platinum organometallic complexes with proteins and nucleic acids in polyacrylamide gels.

Allyl- and propargyl ethers of umbelliferone are sensitive probes for palladium and platinum, including anticancer compounds cisplatin, carboplatin and oxaliplatin, and effective for direct visualization of protein and DNA complexes with organometallic compounds in polyacrylamide gels allowing easy detection of interactions with analyzed protein or nucleic acid. Both probes can be used for fast evaluation of Pd/Pt binding to nanocarriers relevant in drug targeted therapy or specific clinically relevant target macromolecules.

Implantation and diagnostics of endometrial receptivity.

Objective: Literature review of endometrial receptivity in embryo implantation and its diagnostic possibilities.

Design: Literature review.

Setting: Department of Obstetrics and Gynecology, University Hospital, Faculty of Medicine, Palacky University, Olomouc; Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University, Olomouc.

Detergent-modified catalytic and enzymomimetic activity of silver and palladium nanoparticles biotemplated by Pyrococcus furiosus ferritin.

Palladium and silver nanoparticles (NPs) anchored at the outer surface of ferritin form stable suspension of non-coated particles that possess several catalytic and enzymomimetic activities. These activities are strongly affected by detergents that significantly influence the reaction efficiency and specificity. Reductive dehalogenation of various azo dye substrates shows strong differences in reactivity for each substrate-detergent pair.

[Various approaches of endometrial preparation for frozen-thawed embryo transfer].

Objective: Various approaches of endometrial preparation for frozen-thawed embryo transfer.

Design: Retrospective analysis.

Setting: Department of Obstetric and Gyneacology, Faculty of Medicine, Palacky University, University Hospital Olomouc.

Visualization of stable ferritin complexes with palladium, rhodium and iridium nanoparticles detected by their catalytic activity in native polyacrylamide gels.

The reductive discoloration of azo dye, Congo red, catalyzed by noble metal nanoparticles was used to visualize protein-metal complexes in native polyacrylamide gels after counterstaining with Coomassie blue. This technique was used to characterize the synthesis of palladium, rhodium and iridium nanoparticles encapsulated in Pyrococcus furiosus ferritin.

An enzymatic assay based on luciferase Ebola virus-like particles for evaluation of virolytic activity of antimicrobial peptides.

Antimicrobial peptides are currently considered as promising antiviral compounds. Current assays to evaluate the effectivity of peptides against enveloped viruses based on liposomes or hemolysis are encumbered by the artificial nature of liposomes or distinctive membrane composition of used erythrocytes. We propose a novel assay system based on enzymatic Ebola virus-like particles containing sensitive luciferase reporter.

[Recurrent implantation failure and thrombophilia].

Objective: Bring a comprehensive overview of the available knowledge about the importance of thrombophilic mutations in patients with recurrent implantation failure and summary of therapeutic options.

Design: Overview study.

Setting: Department of Obstetric and Gynecology, University Hospital Olomouc.

High positive predictive value of PAPP-A for acute coronary syndrome diagnosis in heparin-naïve patients.

Pregnancy-associated plasma protein-A (PAPP-A) was studied as a marker of acute coronary syndrome (ACS). It has been shown that its levels are increased by heparin administration. Therefore, the aim of our study was to ascertain the diagnostic significance of PAPP-A in heparin-naïve patients and compare it with (TnI).

[Acute abdomen in elderly patients].

Background: Ageing of Czech population and the increase of numbers of elderly people gives new tasks to whole medicine and surgery too.

Method And Results: Presented paper shows some aspects of occurrence, diagnostics and treatment of acute abdomen diseases--inflammatory and intestinal obstruction--in patients older than 60 years. It compares the occurrence and treatment results at an identical surgical department 30 and 60 years ago and nowadays.

[Malignant somatostatinoma (brief overview and a case review)].

Introduction: Somatostatinoma is a rare, slowly growing tumor with malignity potential, most commonly located in the pancreas or duodenum. By the time its diagnosis is established, it is usually large and liver metastases are present. Increased concentrations of somatostatin, produced by pancreatic D cells or by intestinal mucosa, inihibit secretion of a number of GIT hormones, endocrine and exocrine pancreatic secretion.

Aortic stenosis severity is not a risk factor for poststenotic dilatation of the ascending aorta.

Background: Dilatation of the ascending aorta in aortic stenosis may be partly explained by intrinsic wall structure changes, but the relative contribution of altered hemodynamics is unclear. The aim of this study was to assess the association between ascending aortic dimensions and valve stenosis severity.

Methods And Results: An analysis of echocardiographic examinations was conducted in 296 patients with aortic stenosis (179 males, mean age 71 years), 57 with bicuspid and 239 with tricuspid aortic valve, mean transaortic gradient 43+/-20 mmHg, and not more than moderate aortic regurgitation.

[Idiopatic bowel disease].

On the basis of retrospective five years analysis the authors process the problematic of idiopatic bowel disease--Morbus Crohn and ulcerative colitis. They pay main attention to surgical issue--types of operations, differences between acute and elective surgery, perioperative problems and results.

GIST of pancreas.

Authors present the case (from the year 2003) of a 38 years old patient, female with large tumor in the abdominal cavity. Preoperative differential diagnostic examination showed either tumor of pancreas or left liver lobe. The surgery confirmed large tumor body of the pancreas.

[Exenteration procedures in the pelvis].

Exenteration pelvic procedures are surgical options for treatment of locally advanced pelvic tumors. Due to the procedure's success rates, it has become a standard therapeutic procedure, when indicated. From the medical point of view, the following factors characterize the level of seriousness of these procedures: the fact that the procedure is extensive, its complicated reconstruction phase and high postoperative morbidity rates.

Colon resection in elderly patients: comparison of data of a single surgical department with collective data from the Czech Republic.

Colorectal cancer is predominantly a disease of elderly people, since over 70% of cases occur in those aged 65 years or older. Clinicians have to frequently decide whether major surgery is justified in elderly patients with a limited life expectancy. Our retrospective study was aimed to compare outcomes of primary surgery for colorectal cancer in the elderly patient population.

[Reconstruction procedures following pelvic exenterations].

Objective: Review of reconstruction procedures following pelvic exenterations.

Design: Review article.

Setting: Department of Obstetrics and Gynecology, Department of Urology, 1st Department of Surgery, Faculty Teaching Hospital and 1st Medical Faculty of the Charles University, Prague.

[Prevention, diagnosis and surgical treatment of injuries of the biliary tract during laparoscopic cholecystectomy. Treatment of papilla injuries caused by invasive endoscopy. Part 2. Surgical treatment of biliary tract injuries].

Introduction: Introduction of endoscopic invasive procedures in the 70th and 80th years leaded to decrease reoperations on biliary tree. latrogenic injury of the biliary tract have increased in incidence in the first decade with the introduction of laparoscopic cholecystectomy. Athough a number of factors have been identified with a high risk of injury (and number of technical steps have been emphasized to avoid these injury, the incidence of the bile duct injury has reached at least double the rate observed with open cholecystectomy.

[Prevention, diagnosis and treatment of iatrogennic lesions of biliary tract during laparoscopic cholecystectomy. Management of papila injury after invasive endoscopy. Part 1. Prevention and diagnosis of bile duct injuries].

Introduction: Endoscopic invasive procedures in 70th and 80th years leaded to decrease reoperations on biliary tree. Iatrogenic injury of the biliary tract have increased in incidence in the first decade with the introduction of laparoscopic cholecystectomy. Athough a number of factors have been identified with a high risk of injury ( and number of technical steps have been emphasized to avoid these injury, the incidence of the bile duct injury has reached at least double the rate observed with open cholecystectomy.