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Velazquez R, Meechoovet B, Ow A, Foley C, Shaw A, Smith B, Oddo S, Hulme C, Dunckley T. Chronic Dyrk1 Inhibition Delays the Onset of AD-Like Pathology in 3xTg-AD Mice. Mol Neurobiol 2019; 56:8364-8375. [PMID: 31240602 DOI: 10.1007/s12035-019-01684-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 06/17/2019] [Indexed: 01/14/2023]
Abstract
There is a critical need for new treatment approaches that can slow or prevent the progression of Alzheimer's disease (AD). Targets that act simultaneously on multiple relevant pathways could have significant therapeutic potential. Dual-specificity tyrosine phosphorylation-regulated kinase 1A (Dyrk1a) phosphorylates both amyloid precursor protein (APP) and tau. Dyrk1a is upregulated in post-mortem brains of AD patients, and such elevated expression is associated with cognitive deficits. We previously demonstrated that small molecule inhibition of Dyrk1 is well-tolerated and reduces amyloid plaques and pathological forms of tau in 3xTg-AD mice if administered after formation of these pathologies. However, while insoluble forms of hyperphosphorylated tau were reduced by Dyrk1 inhibition, overt neurofibrillary tangle (NFT) pathology remained unchanged. Herein, we specifically test the hypothesis that inhibition of Dyrk1 prior to NFT formation will delay the onset of pathology. 3xTg-AD mice were treated chronically, beginning at 6 months of age, prior to NFT pathology. Mice were dosed daily for either 3 or 6 months and amyloid and tau pathology were assessed. We show that chronic Dyrk1 inhibition reduces insoluble forms of amyloid beta peptides (Aβ) and hyper-phosphorylated tau long-term and that these reductions are associated with dramatic delay in the onset of both amyloid plaques and NFTs. In addition, we show that DYR219, a potent and selective small molecule Dyrk1 inhibitor, induces degradation of Dyrk1a protein, likely contributing to the efficacy of this small molecule approach in vivo. Collectively, these results suggest that therapeutic strategies targeting tau phosphorylation will show the greatest effect if administered very early in the pathogenesis of AD.
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Singh G, Hudson D, Shaw A. Medical Optimization and Liberation of Adult Patients From VA-ECMO. Can J Cardiol 2019; 36:280-290. [PMID: 32036869 DOI: 10.1016/j.cjca.2019.10.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 10/31/2019] [Accepted: 10/31/2019] [Indexed: 12/30/2022] Open
Abstract
Venoarterial extracorporeal membrane oxygenation (VA-ECMO) can be an efficacious cardiopulmonary support for adults as rescue from refractory cardiogenic shock. It is best employed as a bridging strategy to recovery or alternative support rather than sustained, long-term mechanical circulatory support. The purpose of this paper is to discuss strategies to optimize patient management on VA-ECMO and approaches to promote successful separation from support. Rapid medical optimization will assist in reducing the time on VA-ECMO, thereby improving the likelihood of patient salvage. Suitably trained physicians and personnel, guided by structured protocols, can promote excellence in team care and provision of consistent management. Focusing on anticoagulation, careful neurologic monitoring, prevention of leg ischemia, awareness of differential hypoxemia, optimizing mechanical ventilation, identifying and timely intervention for left-ventricular distension (LVD), along with a strategic weaning algorithm, can prevent significant morbidity and mortality. LVD physiology, diagnosis, and risk factors are reviewed. Indications for LV decompression, along with medical and mechanical management options, are elucidated.
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Doebele R, Dziadziuszko R, Drilon A, Shaw A, Wolf J, Farago A, Dennis L, Riehl T, Simmons B, Wu C, Chang CW, Choeurng V, Wilson T. Genomic landscape of entrectinib resistance from ctDNA analysis in STARTRK-2. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz394.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chen J, Bearz A, Kim D, Mamdani H, Bauman J, Chiari R, Ou S, Solomon B, Soo R, Felip E, Shaw A, Clancy J, Lee K, O'Gorman M, Tanski C, Pithavala Y. P1.01-84 Interaction of Lorlatinib with CYP2B6, CYP2C9, UGT, and P-gp Probe Drugs in Patients with Advanced Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Farago A, Yeap B, Heist R, Marcoux J, Rangachari D, Barbie D, Kennedy E, Mino-Kenudson M, Shaw A. OA15.01 Combination Olaparib and Temozolomide in Relapsed Small Cell Lung Cancer: Updated Results from Phase 1/2 Clinical Trial. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Bird R, Naji S, Vowles B, Shaw A, Martin NA. Hypokalaemia with flaccid paralysis following high-voltage electrical injury in an adolescent patient. TRAUMA-ENGLAND 2019. [DOI: 10.1177/1460408619838927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The authors present a case report of a previously healthy 15-year-old male who experienced global weakness in the presence of profound hypokalaemia following a high-voltage electrical arc injury. The clinical picture is discussed in the context of our evolving understanding of electrical injuries and potassium homeostasis.
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Buchheit T, Hsia HLJ, Cooter M, Shortell C, Kent M, McDuffie M, Shaw A, Buckenmaier CT, Van de Ven T. The Impact of Surgical Amputation and Valproic Acid on Pain and Functional Trajectory: Results from the Veterans Integrated Pain Evaluation Research (VIPER) Randomized, Double-Blinded Placebo-Controlled Trial. PAIN MEDICINE 2019; 20:2004-2017. [PMID: 31045229 DOI: 10.1093/pm/pnz067] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVE To determine if the perioperative administration of valproic acid reduces the incidence of chronic pain three months after amputation or revision surgery. DESIGN Multicenter, randomized, double-blind, placebo-controlled trial. SETTING Academic, military, and veteran medical centers. SUBJECTS One hundred twenty-eight patients undergoing amputation or amputation revision surgery at Duke University Hospital, Walter Reed National Military Medical Center, or the Durham Veterans Affairs Medical Center for either medical disease or trauma. METHODS Patients were randomized to placebo or valproic acid for the duration of hospitalization and treated with multimodal analgesic care, including regional anesthetic blockade. Primary outcome was the proportion of patients with chronic pain at three months (average numeric pain score intensity of 3/10 or greater). Secondary outcomes included functional trajectories (assessed with the Brief Pain Inventory short form and the Defense and Veterans Pain Rating Scale). RESULTS The overall rate of chronic pain was 68.2% in the 107 patients who completed the end point assessment. There was no significant effect of perioperative valproic acid administration, with a rate of 65.45% (N = 36) in the treatment group and a rate of 71.15% (N = 37) in the placebo group. Overall, pain scores decreased from baseline to follow-up (median = -2 on the numeric pain scale). Patients additionally experienced improvements in self-perceived function. CONCLUSIONS The rate of chronic pain after amputation surgery is not significantly improved with the perioperative administration of valproic acid. In this cohort treated with multimodal perioperative analgesia and regional anesthetic blockade, we observed improvements in both pain severity and function.
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Paz-Ares L, Dziadziuszko R, Drilon A, John T, Krebs M, Demetri G, Shaw A, Siena S, Wolf J, Farago A, Simmons B, Ye C, Huang X, Doebele R. MA14.02 Entrectinib in Patients with ROS1-Positive NSCLC or NTRK Fusion-Positive Solid Tumors with CNS Metastases. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Stott MC, Tarazi M, Shaw A, Summers A, Moinuddin ZM, van Dellen D. Letter to the Editor: Prophylactic Intraperitoneal Onlay Mesh Following Midline Laparotomy-Long-Term Results of a Randomized Controlled Trial. World J Surg 2019; 44:316-317. [PMID: 31531724 DOI: 10.1007/s00268-019-05187-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Whittington HJ, Ostrowski PJ, McAndrew DJ, Cao F, Shaw A, Eykyn TR, Lake HA, Tyler J, Schneider JE, Neubauer S, Zervou S, Lygate CA. Over-expression of mitochondrial creatine kinase in the murine heart improves functional recovery and protects against injury following ischaemia-reperfusion. Cardiovasc Res 2019; 114:858-869. [PMID: 29509881 PMCID: PMC5909653 DOI: 10.1093/cvr/cvy054] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 03/01/2018] [Indexed: 12/25/2022] Open
Abstract
Aims Mitochondrial creatine kinase (MtCK) couples ATP production via oxidative phosphorylation to phosphocreatine in the cytosol, which acts as a mobile energy store available for regeneration of ATP at times of high demand. We hypothesized that elevating MtCK would be beneficial in ischaemia-reperfusion (I/R) injury. Methods and results Mice were created over-expressing the sarcomeric MtCK gene with αMHC promoter at the Rosa26 locus (MtCK-OE) and compared with wild-type (WT) littermates. MtCK activity was 27% higher than WT, with no change in other CK isoenzymes or creatine levels. Electron microscopy confirmed normal mitochondrial cell density and mitochondrial localization of transgenic protein. Respiration in isolated mitochondria was unaltered and metabolomic analysis by 1 H-NMR suggests that cellular metabolism was not grossly affected by transgene expression. There were no significant differences in cardiac structure or function under baseline conditions by cine-MRI or LV haemodynamics. In Langendorff-perfused hearts subjected to 20 min ischaemia and 30 min reperfusion, MtCK-OE exhibited less ischaemic contracture, and improved functional recovery (Rate pressure product 58% above WT; P < 0.001). These hearts had reduced myocardial infarct size, which was confirmed in vivo: 55 ± 4% in WT vs. 29 ± 4% in MtCK-OE; P < 0.0001). Isolated cardiomyocytes from MtCK-OE hearts exhibited delayed opening of the mitochondrial permeability transition pore (mPTP) compared to WT, which was confirmed by reduced mitochondrial swelling in response to calcium. There was no detectable change in the structural integrity of the mitochondrial membrane. Conclusions Modest elevation of MtCK activity in the heart does not adversely affect cellular metabolism, mitochondrial or in vivo cardiac function, but modifies mPTP opening to protect against I/R injury and improve functional recovery. Our findings support MtCK as a prime therapeutic target in myocardial ischaemia.
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Abdulhadi BA, Kot P, Hashim KS, Shaw A, Khaddar RA. Influence of current density and electrodes spacing on reactive red 120 dye removal from dyed water using electrocoagulation/electroflotation (EC/EF) process. ACTA ACUST UNITED AC 2019. [DOI: 10.1088/1757-899x/584/1/012035] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bailey JD, Diotallevi M, Nicol T, McNeill E, Shaw A, Chuaiphichai S, Hale A, Starr A, Nandi M, Stylianou E, McShane H, Davis S, Fischer R, Kessler BM, McCullagh J, Channon KM, Crabtree MJ. Nitric Oxide Modulates Metabolic Remodeling in Inflammatory Macrophages through TCA Cycle Regulation and Itaconate Accumulation. Cell Rep 2019; 28:218-230.e7. [PMID: 31269442 PMCID: PMC6616861 DOI: 10.1016/j.celrep.2019.06.018] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 02/25/2019] [Accepted: 06/05/2019] [Indexed: 01/04/2023] Open
Abstract
Classical activation of macrophages (M(LPS+IFNγ)) elicits the expression of inducible nitric oxide synthase (iNOS), generating large amounts of NO and inhibiting mitochondrial respiration. Upregulation of glycolysis and a disrupted tricarboxylic acid (TCA) cycle underpin this switch to a pro-inflammatory phenotype. We show that the NOS cofactor tetrahydrobiopterin (BH4) modulates IL-1β production and key aspects of metabolic remodeling in activated murine macrophages via NO production. Using two complementary genetic models, we reveal that NO modulates levels of the essential TCA cycle metabolites citrate and succinate, as well as the inflammatory mediator itaconate. Furthermore, NO regulates macrophage respiratory function via changes in the abundance of critical N-module subunits in Complex I. However, NO-deficient cells can still upregulate glycolysis despite changes in the abundance of glycolytic intermediates and proteins involved in glucose metabolism. Our findings reveal a fundamental role for iNOS-derived NO in regulating metabolic remodeling and cytokine production in the pro-inflammatory macrophage.
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Khandpur U, Huntoon K, Smith-Cohn M, Shaw A, Elder JB. Bilateral Recurrent Dysplastic Cerebellar Gangliocytoma (Lhermitte-Duclos Disease) in Cowden Syndrome: A Case Report and Literature Review. World Neurosurg 2019; 127:319-325. [DOI: 10.1016/j.wneu.2019.03.131] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/12/2019] [Accepted: 03/13/2019] [Indexed: 10/27/2022]
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Shaw A, Riely G, Bang YJ, Kim DW, Camidge D, Shapiro G, Usari T, Wang S, Wilner K, Clark J, Ou SH. Crizotinib in advanced ROS1-rearranged non-small cell lung cancer (NSCLC): Overall survival (OS) and updated safety from PROFILE 1001. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz063.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Moolla M, Dang J, Shaw A, Dang T, Tian C, Karmali S, Sultanian R. A217 SIMETHICONE DECREASES BLOATING AND IMPROVES BOWEL PREPARATION EFFECTIVENESS: A SYSTEMATIC REVIEW AND META-ANALYSIS. J Can Assoc Gastroenterol 2019. [DOI: 10.1093/jcag/gwz006.216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Dang J, Moolla M, Dang T, Shaw A, Tian C, Karmali S, Sultanian R. A218 SODIUM PHOSPHATE IS SUPERIOR TO POLYETHYLENE GLYCOL IN CONSTIPATED PATIENTS UNDERGOING COLONOSCOPY: A SYSTEMATIC REVIEW AND META-ANALYSIS. J Can Assoc Gastroenterol 2019. [DOI: 10.1093/jcag/gwz006.217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Hardy A, Stewart M, Shaw A, Varela M, Wilson S, Randall R, Palmarini M. Species-specific restriction of Bluetongue virus replication correlates to host resilience. Access Microbiol 2019. [DOI: 10.1099/acmi.ac2019.po0130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Galante J, Shaw A, Gandhi S, Harrogate E, Sykes A. Evaluation of potential implementation of proposed 28-day cancer waiting time standard at Oxford University Hospitals NHS Foundation Trust. Lung Cancer 2019. [DOI: 10.1016/s0169-5002(19)30192-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ward N, Stiller K, Holland AE, Bishop J, Button B, Chambers R, Cobb R, Corda J, Dentice R, Green M, Hall K, Hauser J, Morrow S, Netluch R, Nichols A, Rowe H, Shaw A, Shortall D, Smith T, Wood J. Exercise is commonly used as a substitute for traditional airway clearance techniques by adults with cystic fibrosis in Australia: a survey. J Physiother 2019; 65:43-50. [PMID: 30559063 DOI: 10.1016/j.jphys.2018.11.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/08/2018] [Accepted: 11/22/2018] [Indexed: 10/27/2022] Open
Abstract
QUESTIONS What airway clearance techniques and exercise regimens are used by adults with cystic fibrosis (CF) in Australia when well or unwell? What proportion of these adults believe that exercise can be used as a substitute for traditional airway clearance techniques, and how have they come to this belief? What type of exercise is used as a substitute for traditional airway clearance techniques? DESIGN Cross-sectional survey at 13 CF centres in Australia, using a purpose-designed questionnaire. PARTICIPANTS Six hundred and ninety-two adults with CF completed the questionnaire. OUTCOME MEASURES The questionnaire included questions about: the participants' current use of traditional airway clearance techniques and exercise, when well and unwell; and beliefs regarding the use of exercise as a substitute for traditional airway clearance techniques. RESULTS Coughing, huffing and positive expiratory pressure were the most commonly used airway clearance techniques. Walking, jogging and lifting weights were the most commonly used forms of exercise. Overall, 43% of participants believed that exercise could be used as a substitute for traditional airway clearance techniques, with 44% having substituted exercise for traditional airway clearance techniques in the previous 3 months. Personal experience was the most commonly reported factor influencing participants' beliefs about the use of exercise as a substitute for traditional airway clearance techniques. CONCLUSION Exercise is commonly used as a substitute for traditional airway clearance techniques. Physiotherapists should advise patients that whilst there is some research suggesting a possible mechanism for exercise as a form of airway clearance, there are currently no medium-term to long-term data supporting exercise as a stand-alone form of airway clearance. These results suggest that future research to investigate the clinical effectiveness of exercise as a substitute for traditional airway clearance techniques should be a priority. REGISTRATION ACTRN12616000994482.
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Ou S, Cho B, Kim D, Drilon A, Lee J, Lin J, Zhu V, Ahn M, Camidge D, Stopatschinskaja SS, Liu J, Cui J, Hyman D, Doebele R, Shaw A. OA09 Preliminary Clinical Activity of Repotrectinib (TPX-0005) in Advanced ROS1 Fusion-Positive Non-Small Cell Lung Cancer. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.10.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Constantinides C, McNeill E, Carnicer R, Al Haj Zen A, Sainz-Urruela R, Shaw A, Patel J, Swider E, Alonaizan R, Potamiti L, Hadjisavvas A, Padilla-Parra S, Kyriacou K, Srinivas M, Carr CA. Improved cellular uptake of perfluorocarbon nanoparticles for in vivo murine cardiac 19F MRS/MRI and temporal tracking of progenitor cells. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2018; 18:391-401. [PMID: 30448526 DOI: 10.1016/j.nano.2018.10.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 10/22/2018] [Accepted: 10/23/2018] [Indexed: 10/27/2022]
Abstract
Herein, we maximize the labeling efficiency of cardiac progenitor cells (CPCs) using perfluorocarbon nanoparticles (PFCE-NP) and 19F MRI detectability, determine the temporal dynamics of single-cell label uptake, quantify the temporal viability/fluorescence persistence of labeled CPCs in vitro, and implement in vivo, murine cardiac CPC MRI/tracking that could be translatable to humans. FuGENEHD-mediated CPC PFCE-NP uptake is confirmed with flow cytometry/confocal microscopy. Epifluorescence imaging assessed temporal viability/fluorescence (up to 7 days [D]). Nonlocalized murine 19F MRS and cardiac MRI studied label localization in terminal/longitudinal tracking studies at 9.4 T (D1-D8). A 4-8 fold 19F concentration increase is evidenced in CPCs for FuGENE vs. directly labeled cells. Cardiac 19F signals post-CPC injections diminished in vivo to ~31% of their values on D1 by D7/D8. Histology confirmed CPC retention, dispersion, and macrophage-induced infiltration. Intra-cardiac injections of PFCE-NP-labeled CPCs with FuGENE can be visualized/tracked in vivo for the first time with 19F MRI.
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Zhang Q, Vlaeminck SE, DeBarbadillo C, Su C, Al-Omari A, Wett B, Pümpel T, Shaw A, Chandran K, Murthy S, De Clippeleir H. Supernatant organics from anaerobic digestion after thermal hydrolysis cause direct and/or diffusional activity loss for nitritation and anammox. WATER RESEARCH 2018; 143:270-281. [PMID: 29986237 DOI: 10.1016/j.watres.2018.06.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 06/05/2018] [Accepted: 06/16/2018] [Indexed: 06/08/2023]
Abstract
Treatment of sewage sludge with a thermal hydrolysis process (THP) followed by anaerobic digestion (AD) enables to boost biogas production and minimize residual sludge volumes. However, the reject water can cause inhibition to aerobic and anoxic ammonium-oxidizing bacteria (AerAOB & AnAOB), the two key microbial groups involved in the deammonification process. Firstly, a detailed investigation elucidated the impact of different organic fractions present in THP-AD return liquor on AerAOB and AnAOB activity. For AnAOB, soluble compounds linked to THP conditions and AD performance caused the main inhibition. Direct inhibition by dissolved organics was also observed for AerAOB, but could be overcome by treating the filtrate with extended aerobic or anaerobic incubation or with activated carbon. AerAOB additionally suffered from particulate and colloidal organics limiting the diffusion of substrates. This was resolved by improving the dewatering process through an optimized flocculant polymer dose and/or addition of coagulant polymer to better capture the large colloidal fraction, especially in case of unstable AD performance. Secondly, a new inhibition model for AerAOB included diffusion-limiting compounds based on the porter-equation, and achieved the best fit with the experimental data, highlighting that AerAOB were highly sensitive to large colloids. Overall, this paper for the first time provides separate identification of organic fractions within THP-AD filtrate causing differential types of inhibition. Moreover, it highlights the combined effect of the performance of THP, AD and dewatering on the downstream autotrophic nitrogen removal kinetics.
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Lin J, Kim D, Drilon A, Doebele R, Lee J, Zhu V, Ahn M, Lim J, Stopatschinskaja S, Cui J, Hyman D, Camidge R, Ou S, Shaw A, Cho B. OA02.02 Safety and Preliminary Clinical Activity of Ropotrectinib (TPX-0005), a ROS1/TRK/ALK Inhibitor, in Advanced ROS1 Fusion-Positive NSCLC. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.240] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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