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Target fishing reveals PfPYK-1 and PfRab6 as potential targets of an antiplasmodial 4-anilino-2-trichloromethylquinazoline hit compound. Bioorg Med Chem 2024; 102:117654. [PMID: 38452406 DOI: 10.1016/j.bmc.2024.117654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/22/2024] [Accepted: 02/22/2024] [Indexed: 03/09/2024]
Abstract
We present investigations about the mechanism of action of a previously reported 4-anilino-2-trichloromethylquinazoline antiplasmodial hit-compound (Hit A), which did not share a common mechanism of action with established commercial antimalarials and presented a stage-specific effect on the erythrocytic cycle of P. falciparum at 8 < t < 16 h. The target of Hit A was searched by immobilising the molecule on a solid support via a linker and performing affinity chromatography on a plasmodial lysate. Several anchoring positions of the linker (6,7 and 3') and PEG-type linkers were assessed, to obtain a linked-hit molecule displaying in vitro antiplasmodial activity similar to that of unmodified Hit A. This allowed us to identify the PfPYK-1 kinase and the PfRab6 GTP-ase as potential targets of Hit A.
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Incisional hernia following colorectal cancer surgery according to suture technique: Hughes Abdominal Repair Randomized Trial (HART). Br J Surg 2022; 109:943-950. [PMID: 35979802 PMCID: PMC10364691 DOI: 10.1093/bjs/znac198] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/09/2022] [Accepted: 05/13/2022] [Indexed: 11/14/2022]
Abstract
BACKGROUND Incisional hernias cause morbidity and may require further surgery. HART (Hughes Abdominal Repair Trial) assessed the effect of an alternative suture method on the incidence of incisional hernia following colorectal cancer surgery. METHODS A pragmatic multicentre single-blind RCT allocated patients undergoing midline incision for colorectal cancer to either Hughes closure (double far-near-near-far sutures of 1 nylon suture at 2-cm intervals along the fascia combined with conventional mass closure) or the surgeon's standard closure. The primary outcome was the incidence of incisional hernia at 1 year assessed by clinical examination. An intention-to-treat analysis was performed. RESULTS Between August 2014 and February 2018, 802 patients were randomized to either Hughes closure (401) or the standard mass closure group (401). At 1 year after surgery, 672 patients (83.7 per cent) were included in the primary outcome analysis; 50 of 339 patients (14.8 per cent) in the Hughes group and 57 of 333 (17.1 per cent) in the standard closure group had incisional hernia (OR 0.84, 95 per cent c.i. 0.55 to 1.27; P = 0.402). At 2 years, 78 patients (28.7 per cent) in the Hughes repair group and 84 (31.8 per cent) in the standard closure group had incisional hernia (OR 0.86, 0.59 to 1.25; P = 0.429). Adverse events were similar in the two groups, apart from the rate of surgical-site infection, which was higher in the Hughes group (13.2 versus 7.7 per cent; OR 1.82, 1.14 to 2.91; P = 0.011). CONCLUSION The incidence of incisional hernia after colorectal cancer surgery is high. There was no statistical difference in incidence between Hughes closure and mass closure at 1 or 2 years. REGISTRATION NUMBER ISRCTN25616490 (http://www.controlled-trials.com).
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Detection of non-metastatic non-small-cell lung cancer in urine by methylation-specific PCR analysis: a feasibility study. Lung Cancer 2022; 170:156-164. [DOI: 10.1016/j.lungcan.2022.06.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/27/2022] [Accepted: 06/20/2022] [Indexed: 12/25/2022]
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Identification of the (cancer) extracellular vesicle surface proteome and its application to detect prostate cancer in urine. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)01015-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Short/long-term cryopreservation prior to comet assay of whole-blood leukocytes and in vitro-cultured lung fibroblasts. Toxicol Mech Methods 2021; 31:531-537. [PMID: 34016016 DOI: 10.1080/15376516.2021.1933286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Single-cell gel electrophoresis (comet assay) is a valuable test that can be used in ecotoxicological, epidemiological, and biomonitoring contexts. We assessed the effects of short- (without cryopreservation) and long-term (with cryopreservation) storage of DMEM-cultivated human peripheral blood leukocytes (HPBLs) and a human lung fibroblast cell line (FLECH-104) on comet assay results. Samples were stored for 6 or 24 h at room temperature (23°С) or 4 °C and frozen at -80 °C or -196 °C for 1, 2, or 4 weeks. Short-term storage led to significant increases in the comet tail intensity (TI) and Olive tail moment (OTM) in HPBL and FLECH-104 samples. Freezing FLECH-104 samples at -80°С and -196°С resulted in TI mean increases, with no differences in OTM. All frozen HPBL samples did not exhibit significant increases in TI or OTM, and instead exhibited a slight decrease in TI versus the control at both -80 °C and -196 °C. Increased frequency of highly damaged cells was observed in FLECH-104 and HPBL cultures during both short-term storage and after freezing, which may indicate a significant destructive effect. Therefore, freezing of cell cultures and whole blood according to our protocol is not recommended.
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Detection of colorectal cancer in urine using DNA methylation analysis. Sci Rep 2021; 11:2363. [PMID: 33504902 PMCID: PMC7840909 DOI: 10.1038/s41598-021-81900-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 01/11/2021] [Indexed: 12/24/2022] Open
Abstract
Colorectal cancer (CRC) is the second leading cause for cancer-related death globally. Clinically, there is an urgent need for non-invasive CRC detection. This study assessed the feasibility of CRC detection by analysis of tumor-derived methylated DNA fragments in urine. Urine samples, including both unfractioned and supernatant urine fractions, of 92 CRC patients and 63 healthy volunteers were analyzed for DNA methylation levels of 6 CRC-associated markers (SEPT9, TMEFF2, SDC2, NDRG4, VIM and ALX4). Optimal marker panels were determined by two statistical approaches. Methylation levels of SEPT9 were significantly increased in urine supernatant of CRC patients compared to controls (p < 0.0001). Methylation analysis in unfractioned urine appeared inaccurate. Following multivariate logistic regression and classification and regression tree analysis, a marker panel consisting of SEPT9 and SDC2 was able to detect up to 70% of CRC cases in urine supernatant at 86% specificity. First evidence is provided for CRC detection in urine by SEPT9 methylation analysis, which combined with SDC2 allows for an optimal differentiation between CRC patients and controls. Urine therefore provides a promising liquid biopsy for non-invasive CRC detection.
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Hartmann's procedure versus intersphincteric abdominoperineal excision (HiP Study): a multicentre prospective cohort study. Colorectal Dis 2020; 22:2114-2122. [PMID: 32939956 DOI: 10.1111/codi.15366] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/19/2020] [Accepted: 09/06/2020] [Indexed: 02/08/2023]
Abstract
AIM In patients with low rectal cancer it is occasionally necessary to avoid a low coloanal anastomosis due to patient frailty or poor function. In such situations there are two alternative approaches: Hartmann's procedure (HP) or intersphincteric abdominoperineal excision (IAPE). There are few data to guide surgeons as to which of these two procedures is the safest. The aim of this study was to determine the surgical complication rates associated with each procedure. METHOD This was a multicentre, nonrandomized prospective cohort study of patients undergoing either HP or IAPE. The primary objective was to determine surgical complication rates. Secondary objectives included length of stay, time to adjuvant therapy and quality of life at 90 days. RESULTS One hundred and seventy nine patients were recruited between April 2016 and June 2019; approximately two thirds of patients underwent HP and one third IAPE. The overall complication rate was high in both groups (54% for the HP group and 52% for the IAPE group). Surgery-specific complication rates were also high, but not significantly different: 43% for HP and 48% for IAPE. The pelvic abscess rate in HP was 11% and was significantly higher in patients with a palpable staple line (15% vs 2%). There was a higher incidence of serious medical complications following IAPE (16% vs 5%), along with a reduction in 90-day quality of life scores. CONCLUSION This is the largest prospective study to compare HP and IAPE in patients undergoing rectal cancer surgery where primary anastomosis is not deemed appropriate. With similar complication rates, these data support the ongoing use of either HP or IAPE in this patient group.
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Comparison between Conventional and Nonconventional Methods for the Synthesis of Some 2-Oxazolidinone Derivatives and Preliminary Investigation of Their Inhibitory Activity Against Certain Protein Kinases. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2019. [DOI: 10.1134/s1070428019070248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Percolation behaviors of ionic and electronic transfers in Li 3-2xCo xN. Phys Chem Chem Phys 2019; 21:2790-2803. [PMID: 30667005 DOI: 10.1039/c8cp06770h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitridocobaltates Li3-2xCoxN, with Li3N-type layered structure, are promising compounds as negative electrode materials for Li-ion batteries. In the present paper, we report the first detailed broadband dielectric spectroscopy (BDS) study on lithiated transition metal nitrides. The ionic and electronic conductivities of Li3-2xCox□xN compounds (0 ≤ x ≤ 0.44) are investigated as a function of the concentration x of cobalt ions, cationic vacancies (□) and lithium ions. Dielectric and conductivity spectra were recorded within the frequency range of 60-1010 Hz from 200 to 300 K. Experimental results exhibit two types of electric conduction: the first one is due to lithium ion diffusion (for 0 ≤ x ≤ 0.25) and the second one due to electronic transfers (for x ≥ 0.3). Furthermore, two percolation transitions are evidenced and associated with 3D ionic transfers (threshold at x ≈ 0.11) on the one hand and 2D electronic transfers (threshold at x ≈ 0.30) on the other hand. Upon increasing the frequency, dielectric relaxations appear from larger to smaller sample scales. These successive polarizations appear with increasing frequency in the following order: (a) sample/silver paint interface; (b) particles (aggregates of grains); (c) grains (crystallites); (d) local ionic and electronic motions within the grains. Evolutions of dielectric relaxation parameters (dielectric strength and relaxation frequency) with Co content confirm the two percolation transitions. Surprisingly, the grain conductivity has a large discontinuity immediately below the electronic percolation threshold where any local- and long-range ionic movement disappears without electronic transfer. This discontinuity would be due to a narrow transition from ionic to electronic conduction when x increases.
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A protocol for urine collection and storage prior to DNA methylation analysis. PLoS One 2018; 13:e0200906. [PMID: 30142219 PMCID: PMC6108475 DOI: 10.1371/journal.pone.0200906] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 07/04/2018] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Urine poses an attractive non-invasive means for obtaining liquid biopsies for oncological diagnostics. Especially molecular analysis on urinary DNA is a rapid growing field. However, optimal and practical storage conditions that result in preservation of urinary DNA, and in particular hypermethylated DNA (hmDNA), are yet to be determined. AIM To determine the most optimal and practical conditions for urine storage that result in adequate preservation of DNA for hmDNA analysis. METHODS DNA yield for use in methylation analysis was determined by quantitative methylation specific PCR (qMSP) targeting the ACTB and RASSF1A genes on bisulfite modified DNA. First, DNA yield (ACTB qMSP) was determined in a pilot study on urine samples of healthy volunteers using two preservatives (Ethylenediaminetetraacetic acid (EDTA) and Urine Conditioning Buffer, Zymo Research) at four different temperatures (room temperature (RT), 4°C, -20°C, -80°C) for four time periods (1, 2, 7, 28 days). Next, hmDNA levels (RASSF1A qMSP) in stored urine samples of patients suffering from bladder cancer (n = 10) or non-small cell lung cancer (NSCLC; n = 10) were measured at day 0 and 7 upon storage with and without the addition of 40mM EDTA and/or 20 μl/ml Penicillin Streptomycin (PenStrep) at RT and 4°C. RESULTS In the pilot study, DNA for methylation analysis was only maintained at RT upon addition of preserving agents. In urine stored at 4°C for a period of 7 days or more, the addition of either preserving agent yielded a slightly better preservation of DNA. When urine was stored at -20 °C or -80 °C for up to 28 days, DNA was retained irrespective of the addition of preserving agents. In bladder cancer and NSCLC samples stored at RT loss of DNA was significantly less if EDTA was added compared to no preserving agents (p<0.001). Addition of PenStrep did not affect DNA preservation (p>0.99). Upon storage at 4°C, no difference in DNA preservation was found after the addition of preserving agents (p = 0.18). The preservation of methylated DNA (RASSF1A) was strongly correlated to that of unmethylated DNA (ACTB) in most cases, except when PCR values became inaccurate. CONCLUSIONS Addition of EDTA offers an inexpensive preserving agent for urine storage at RT up to seven days allowing for reliable hmDNA analysis. To avoid bacterial overgrowth PenStrep can be added without negatively affecting DNA preservation.
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Major venom proteins of the fire ant Solenopsis invicta: insights into possible pheromone-binding function from mass spectrometric analysis. INSECT MOLECULAR BIOLOGY 2018; 27:505-511. [PMID: 29656567 PMCID: PMC6188847 DOI: 10.1111/imb.12388] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Proteins in the venom of the fire ant Solenopsis invicta have been suggested to function in pheromone binding. Venom from queens and workers contains different isoforms of these proteins, consistent with the differing pheromones they secrete, but questions remain about the venom protein composition and glandular source. We found that the queen venom contains a previously uncharacterized pheromone-binding protein paralogue known as Sol i 2X1. Using imaging mass spectrometry, we located the main venom proteins in the poison sac, implying that pheromones might have to compete with venom alkaloids for binding. Using the known structure of the worker venom protein Sol i 2w, we generated three-dimensional homology models of the worker venom protein Sol i 4.02, and of the two main venom proteins in queens and female alates, Sol i 2q and Sol i 2X1. Surprisingly, the models show that the proteins have relatively small internal hydrophobic binding pockets that are blocked by about 10 amino acids of the C-terminal region. For these proteins to function as carriers of hydrophobic ligands, a conformational change would be required to displace the C-terminal region, somewhat like the mechanism known to occur in the silk moth pheromone-binding protein.
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6E11, a highly selective inhibitor of Receptor-Interacting Protein Kinase 1, protects cells against cold hypoxia-reoxygenation injury. Sci Rep 2017; 7:12931. [PMID: 29018243 PMCID: PMC5635128 DOI: 10.1038/s41598-017-12788-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 09/15/2017] [Indexed: 11/24/2022] Open
Abstract
Necroptosis is a programmed cell death pathway that has been shown to be of central pathophysiological relevance in multiple disorders (hepatitis, brain and cardiac ischemia, pancreatitis, viral infection and inflammatory diseases). Necroptosis is driven by two serine threonine kinases, RIPK1 (Receptor Interacting Protein Kinase 1) and RIPK3, and a pseudo-kinase MLKL (Mixed Lineage Kinase domain-Like) associated in a multi-protein complex called necrosome. In order to find new inhibitors for use in human therapy, a chemical library containing highly diverse chemical structures was screened using a cell-based assay. The compound 6E11, a natural product derivative, was characterized as a positive hit. Interestingly, this flavanone compound: inhibits necroptosis induced by death receptors ligands TNF-α (Tumor Necrosis Factor) or TRAIL (TNF-Related Apoptosis-Inducing Ligand); is an extremely selective inhibitor, among kinases, of human RIPK1 enzymatic activity with a nM Kd; has a non-ATP competitive mode of action and a novel putative binding site; is weakly cytotoxic towards human primary blood leukocytes or retinal pigment epithelial cells at effective concentrations; protects human aortic endothelial cells (HAEC) from cold hypoxia/reoxygenation injury more effectively than necrostatin-1 (Nec-1) and Nec-1s. Altogether, these data demonstrate that 6E11 is a novel potent small molecular inhibitor of RIPK1-driven necroptosis.
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Unravelling redox processes of Li7MnN4 upon electrochemical Li extraction–insertion using operando XAS. Phys Chem Chem Phys 2017; 19:27204-27211. [DOI: 10.1039/c7cp05207c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Evolution upon electrochemical oxidation of the Li7MnN4 Mn K-edge absorption spectra has been described using 3 distinctive local environments.
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Poor pain control in major gastrointestinal surgery. Int J Surg 2016. [DOI: 10.1016/j.ijsu.2016.08.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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SUN-P028: Prevalence and Overlap of Sarcopenia, Cachexia, Frailty and Malnutrition in Older Medical Inpatients. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30371-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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SP-0198: The way forward in organ preservation strategies for rectal cancer. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)31447-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Decompressive Atrioseptostomy (DAS) for the Treatment of Severe Pulmonary Hypertension Secondary to Restrictive Cardiomyopathy. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Feasibility of Percutaneous Pulmonary Valve Implantation: Reasons for Failure and Contraindications. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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The Risk of Bacterial Endocarditis after Percutaneous and Surgical Biological Pulmonary Valve Implantation. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Challenges for Scale-up of Batch Phase Separations. CHEM-ING-TECH 2015. [DOI: 10.1002/cite.201550010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Erfolgreiche Rekanalisation eines kompletten Verschlusses der rechten Koronararterie bei einem atypischen Kawasaki Syndrom. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1556011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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The size and performance of offshore produced water oil-removal technologies for reinjection. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.07.037] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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K0.5V2O5: A novel Li intercalation compound as positive electrode material for rechargeable lithium batteries. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.12.039] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Audiovisual integration of print and speech emerges when children learn to read: A developmental neuroimaging study. Int J Psychophysiol 2012. [DOI: 10.1016/j.ijpsycho.2012.06.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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A critical appraisal of endorectal ultrasound and transanal endoscopic microsurgery and decision-making in early rectal cancer. Colorectal Dis 2012; 14:821-6. [PMID: 21920011 DOI: 10.1111/j.1463-1318.2011.02830.x] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
AIM Transanal endoscopic microsurgery (TEM) for early rectal cancer (ERC) gives results similar to major surgery in selected cases. Endorectal ultrasound (ERUS) is an important part of the preoperative selection process. This study reports its accuracy and impact for patients entered on the UK TEM database. METHOD The UK TEM database comprises prospectively collected data on 494 patients. This data set was used to determine the prevalence of ERUS in preoperative staging and its accuracy by comparing preoperative T-stage with definitive pathological staging following TEM. RESULTS ERUS was performed in 165 of 494 patients who underwent TEM for rectal cancer. It inaccurately staged rectal cancer in 44.8% of tumours: 32.7% were understaged and 12.1% were overstaged. There was no significant difference in the depth of TEM excision or R1 rate between the patients who underwent ERUS before TEM and those who did not (P = 0.73). CONCLUSION The data show that ERUS is employed in a minority of patients with rectal cancers undergoing TEM in the UK and its accuracy in this 'Real World' practice is disappointing.
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A kinetic study of electrochemical lithium insertion in nanosized rutile β-MnO2 by impedance spectroscopy. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.08.118] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Of Mice and MAGL (Monoacylglycerol Lipase). FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.lb158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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The peculiar structural behaviour of β-Na0.33V2O5 upon electrochemical lithium insertion. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11393c] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
INTRODUCTION Hypersensitivity reactions to iodinated radio contrast media (RCM) are either immediate-type (IT) or delayed reactions (DT). In IT, the pathomechanism is unclear. In DT, delayed positive patch (PT) and intradermal tests (IDT) and RCM-specific T cells suggest a T cell-mediated mechanism. In both, the role of iodine has not been clarified; however, patients are often labelled as 'iodine allergic'. Occasionally, positive skin tests to iodine-containing drugs are observed. OBJECTIVE We investigated the presence of hypersensitivity to iodine in patients with a history of hypersensitivity reactions to RCM. METHODS Nineteen patients with a history of IT (n=9) or DT (n=10) to RCM were investigated. Skin prick tests, IDT and PT with several RCM and iodine formulations were carried out. All underwent oral provocation with Lugol's solution (LS). Two patients each with iodine mumps, contact dermatitis to iodized antiseptics and chronic idiopathic urticaria served as control or proof of concept. RESULTS In the IT group, skin tests were positive in three out of nine patients to one RCM. One patient with negative skin tests reacted twice to oral iodine with urticaria. In the DT group, sensitization to one or several RCM was identified in 10 out of 10 patients. In seven out of 10 patients, additional sensitizations to the iodine formulations were found. Two patients developed a mild exanthema after oral provocation with LS. CONCLUSION We have previously demonstrated in patients with iodine mumps that an oral challenge with LS is a valid means to elicit hypersensitivity reactions to iodine. In 19 patients, we showed that iodine is rarely the eliciting agent in hypersensitivity reactions to RCM. Only one patient with a late urticaria to an RCM with a late urticaria to LS and two patients with DT and broad sensitization to all RCM tested reacted to LS with an exanthema. In most cases, more likely the RCM molecules and not iodine are the eliciting compounds.
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I'm a PC (Pyruvate Carboxylase)…and diabetes was not my idea! FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.lb116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Audiovisual integration of print and speech from kindergarten to adulthood: An fMRI and ERP study. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70786-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Get “Hooked” On
Brugia malayi
Asparaginyl tRNA Synthetase. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.lb309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ein Vergleich zweier Sedimentationsverfahren zur Bestimmung des Staubungsverhaltens von Pulvern. CHEM-ING-TECH 2008. [DOI: 10.1002/cite.200700167] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Recurrent Flexural Exanthema (SDRIFE or Baboon Syndrome) after Administration of Two Different Iodinated Radio Contrast Media. Dermatology 2006; 214:89-93. [PMID: 17191055 DOI: 10.1159/000096920] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2005] [Accepted: 03/27/2006] [Indexed: 12/31/2022] Open
Abstract
In 1984, the baboon syndrome was described as a particular form of systemic contact dermatitis that occurred after the administration of a contact allergen in individuals previously sensitized by topical exposure to the same allergen. Its clinical picture presents as an erythema of the buttocks and upper inner thighs resembling the red bottom of baboons. This specific reaction was originally observed with mercury, nickel and ampicillin. Since then over 100 cases have been described, most of them without known prior sensitization to the causative agent. In 2004, our group proposed the acronym SDRIFE specifically for cases associated with systemic drugs; it stands for symmetrical drug-related intertriginous and flexural exanthema, as a distinct reaction pattern related to systemic drugs. Here we describe a case of SDRIFE after administration of the iodinated radio contrast medium (RCM) iomeprol (Iomeron), accidentally reproduced by the RCM iopromide (Ultravist). Positive delayed skin tests with both drugs were observed indicating that the pathomechanism of SDRIFE is likely a cell-mediated type IV allergy. Oral potassium iodide and a skin-test-negative RCM were administered and both tolerated, indicating that the antigen is related to the molecules and not to iodine itself. Therefore, in our case skin tests had a good positive and negative predictive value.
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The sol–gel chromium-modified V6O13 as a cathodic material for lithium batteries. J Solid State Electrochem 2005. [DOI: 10.1007/s10008-005-0071-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Drug hypersensitivity reactions: from clinical manifestations to an allergologic diagnosis. Eur Ann Allergy Clin Immunol 2005; 37:213-8. [PMID: 16156399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
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An electrochemical impedance spectroscopy study of new lithiated manganese oxides for 3 V application in rechargeable Li-batteries. Electrochim Acta 2003. [DOI: 10.1016/s0013-4686(02)00785-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
This paper assumes that evocative constancy, the ability to evoke reliably good-enough images of self and object in times of stress, underlies not only self and object constancy, but also the development of memory and the symbolic processes. It is suggested that a crucial element in this development is the mother's ability to construct and retain a vivid, cohesive, and reliable memory of her child, and to engage--in a multitude of implicit ways--in a process of mutual holding in memory. Where this process is deficient, the child, and later the adult, may experience discontinuities of the self, which find expression in profound anxieties, phobias, and problems of memory and learning. As these discontinuities are revived in the transference and the countertransference, both patient and analyst must work together to keep each other reliably alive in memory.
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Electrochemical investigation of the Li insertion–extraction reaction as a function of lithium deficiency in Li1−xNi1+xO2. Electrochim Acta 2001. [DOI: 10.1016/s0013-4686(00)00681-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
We retrospectively assessed seventy-four consecutive patients with AML over 65 years of age (median 71; range 65-88) treated with an individualized approach in two specialized cancer centers. Patients were managed according to their performance status (PS) and associated diseases in both institutions. The proportion of patients with poor PS (3-4) was higher in center 1 (37%) than in center 2 (10%) and in center 1 palliative treatment was given more frequently (16/32 patients) than in center 2 (7/42 patients). Fifty-one patients received intensive combination chemotherapy including an anthracycline and ara-C or VP16 (2 patients) and 36 patients received a second intensive course as reinduction or as consolidation treatment after complete remission. Patients not eligible for myelosuppressive chemotherapy were treated with palliative measures (23 patients). With intensive chemotherapy, complete remission (CR) was achieved in 29 of 51 patients (57%), after first (20 patients) or second course (9 patients) and the rate of deaths during induction was 14% (7 patients). The CR rate was lower for patients with performance status >or= 2 (48%) as compared to patients with performance status <or= 1 (78%) and for patients with secondary AML (46%) as compared to patients with de novo AML (60%). Median survival was 9.1 months for patients receiving intensive treatment and 1.2 months for patients receiving palliative treatment (P=0.001). In the Cox model for overall survival, treatment with curative intent was associated with longer survival (hazard ratio: 0.33, 95% confidence interval: 0.18-0.58) and poor performance status (PS >or= 2) was associated with reduced survival (hazard ratio: 3.29, 95% confidence interval: 1.75-6.17). Overall 2-years and 5-years survival were 20% and 11% for the patients treated intensively. From this study it appears that an individualized approach of treatment with intensive chemotherapy for selected patients offers a substantial CR rate and an improvement in survival. This analysis also suggests that differences in outcome between single institutions can be explained mainly by referral and selection biases
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Retroperitoneal mature teratoma 15 years after initial treatment of testicular mixed germ cell tumor. Eur Urol 2000; 38:644-8. [PMID: 11096252 DOI: 10.1159/000020347] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We present a patient with a retroperitoneal tumor noted 15 years after treatment of a testicular mixed germ cell cancer. The patient initially underwent right-sided orchiectomy and retroperitoneal lymph node dissection for clinical stage I disease. An early relapse indicated by increasing tumor markers shortly after retroperitoneal lymph node dissection was successfully treated with five cycles of combined chemotherapy. However, 187 months after completion of chemotherapy, a symptomatic right-sided iliac mass was diagnosed. Radical surgical excision of the mass was performed and histologic examination revealed differentiated mature teratoma. This represents the longest time interval reported in the literature for a mature teratoma following treatment of a testicular germ cell tumor.
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Abstract
The proteins Msb3p (Ynl293p) and Msb4p (Yol112p) of the yeast Saccharomyces cerevisiae are very similar in sequence and share a highly conserved domain called TBC. To characterize the cellular functions of these proteins, we constructed single and double yeast mutants by disrupting the MSB3 gene, the MSB4 gene, or both. Co-deletion of the MSB3 and MSB4 coding regions caused growth inhibition in the presence of 10 mM caffeine and 4% dimethyl sulphoxide (DMSO), increased the sensitivity of the yeast strain to latrunculin-A, produced a random budding pattern in diploid cells, and affected the organization of the actin cytoskeleton. Caffeine sensitivity is often associated with defects in mitogen-activated protein (MAP) kinase pathways, highly conserved mechanisms mediating transduction of external signals. The biological effect of DMSO in S. cerevisiae is unclear. The msb3 msb4 mutant's increased sensitivity to latrunculin-A suggests that the double mutation causes destabilization of the actin cytoskeleton. Microscopic observations confirmed this: in haploid and diploid msb3 msb4 mutant cells, polymerized actin was delocalized from the budding sites. Complementation studies suggested that MSB3 and MSB4 encode overlapping activities in the yeast cells. We thus propose that both Msb3p and Msb4p act in budding site selection, probably via their involvement in the organization of the actin cytoskeleton.
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Evidence for a role of gammadelta T cells in demyelinating diseases as determined by activation states and responses to lipid antigens. J Neuroimmunol 2000; 107:124-9. [PMID: 10854646 DOI: 10.1016/s0165-5728(00)00220-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this report we review current information on the phenotypic and functional properties of gammadelta T cells in demyelinating disorders. The results support the conclusion that although gammadelta T cells show evidence of activation in patients with either multiple sclerosis (MS) or Guillain Barrè syndrome (GBS), differences exist in the phenotypic and functional properties of these cells between the two diseases. In particular, our data indicate that in patients with MS the Vdelta2 subset is activated and that these cells can be induced to secrete high levels of proinflammatory cytokines. In contrast, in patients with GBS, the Vdelta1 subset is expanded and can be induced to secrete cytokines more associated with a humoral response.
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The fusion protein MEN 11303 (granulocyte-macrophage colony stimulating factor/erythropoietin) acts as a potent inducer of erythropoiesis. Exp Hematol 2000; 28:490-8. [PMID: 10812238 DOI: 10.1016/s0301-472x(00)00136-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE A fusion protein made of human granulocyte-macrophage colony-stimulating factor (GM-CSF) and erythropoietin (EPO), referred to as MEN 11303, has been tested for biologic activity using mobilized CD34(+) cells. METHODS AND RESULTS MEN 11303 and a combination of GM-CSF/EPO produced the same amount of colony-forming unit granulocyte-macrophage (CFU-GM), of burst-forming unit erythroid (BFU-E), and of multipotent CFU-mixed. After 15 days, liquid cultures of CD34(+) cells exposed to MEN 11303 yielded a total cell number larger than that obtained with an equimolar mixture of GM-CSF and EPO, with a clear prevalence of cells exhibiting an erythroid phenotype. A colony-forming cell assay established from CD34(+) cells precultured with MEN 11303 for 7 days yielded a greater amount of BFU-E than GM-CSF/EPO combination. Exposing CD34(+) cells to MEN 11303 for 7 days in liquid culture resulted in higher recoveries of cells expressing a comparatively less differentiated hematopoietic phenotype and of long-term culture initiating cells. A cell-based binding-competition assay using the human EPO-receptor (EPO-R) transfected murine Ba/F3EPOR cell line showed that MEN 11303 bound to EPO-R with a sixfold lower affinity but induced a more sustained receptor phosphorylation. MEN 11303 supported the growth of Ba/F3EPOR cells more efficiently than EPO and remained detectable in the spent culture medium for a longer time. CONCLUSIONS MEN 11303 and the combination of GM-CSF/EPO are equally potent in recruiting hematopoietic progenitors into cycle, but the fusion protein is superior in promoting the expansion of committed erythroid percursors. Primitive hematopoiesis is less affected by MEN110303 than GM-CSF/EPO combination. Part of these effects may reflect the peculiar interaction of the EPO moiety of MEN 11303 with the EPO-R.
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