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Structural and biochemical characterization of the novel CTX-M-151 extended-spectrum β-lactamase and its inhibition by Avibactam.

Barbara Ghiglione, María Margarita Rodríguez, Florencia Brunetti, Krisztina M Papp-Wallace, Ayumi Yoshizumi, Yoshikazu Ishii, Robert A Bonomo, Gabriel Gutkind, Sebastián Klinke, Pablo Power,

The diazabicyclooctane (DBO) inhibitor, avibactam (AVI), reversibly inactivates most serine-β-lactamases including the CTX-M β-lactamases. Currently, more than 230 CTX-M unique members distributed in five clusters with less than 5% amino acid sequence divergence within each group are described. Recently, a variant named as CTX-M-151 was isolated from a <i>Salmonella</i> Choleraesuis ... Read more >>

Antimicrob Agents Chemother (Antimicrobial agents and chemotherapy)
[2021, :]

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The leap to faculty in the time of COVID19

Pamela J. Power, Gabri M. Warren,

Nurses are essential workers, particularly in a pandemic. Increasingly complex patients and an ever-changing health care environment are a few of the challenges that nursing faculty have to prepare novice nurses for, now more than ever, but it is proving difficult due to the limited number of nursing faculty. In ... Read more >>

J Prof Nurs (Journal of professional nursing : official journal of the American Association of Colleges of Nursing)
[2020, 37(1):34-37]

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The Monomeric Alanediyl :AlAriPr8 (AriPr8 = C6H-2,6-(C6H2-2,4,6-Pri3)2-3,5-Pri2): An Organoaluminum(I) Compound with a One-Coordinate Aluminum Atom.

Joshua D Queen, Annika Lehmann, James C Fettinger, Heikki M Tuononen, Philip P Power,

Reduction of the aluminum iodide AlI<sub>2</sub>Ar<sup><i>i</i>Pr8</sup> (<b>1</b>; Ar<sup><i>i</i>Pr8</sup> = C<sub>6</sub>H-2,6-(C<sub>6</sub>H<sub>2</sub>-2,4,6-Pr<sup><i>i</i></sup><sub>3</sub>)<sub>2</sub>-3,5-Pr<i><sup>i</sup></i><sub>2</sub>) with 5% w/w Na/NaCl in hexanes gave a dark red solution from which the monomeric alanediyl <b>:</b>AlAr<sup><i>i</i>Pr8</sup> (<b>2</b>) was isolated in ca. 28% yield as yellow-orange crystals. Compounds <b>1</b> and <b>2</b> were characterized by X-ray crystallography, electronic and NMR spectroscopy, ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2020, 142(49):20554-20559]

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Molecular Complexes Featuring Unsupported Dispersion-Enhanced Aluminum-Copper and Gallium-Copper Bonds.

Kristian L Mears, Cary R Stennett, Elina K Taskinen, Caroline E Knapp, Claire J Carmalt, Heikki M Tuononen, Philip P Power,

The reaction of the copper(I) β-diketiminate copper complex {(Cu(BDI<sup>Mes</sup>))<sub>2</sub>(μ-C<sub>6</sub>H<sub>6</sub>)} (BDI<sup>Mes</sup> = <i>N</i>,<i>N</i>'-bis(2,4,6-trimethylphenyl)pentane-2,4-diiminate) with the low-valent group 13 metal β-diketiminates M(BDI<sup>Dip</sup>) (M = Al or Ga; BDI<sup>Dip</sup> = <i>N</i>,<i>N</i>'-bis(2,6-diisopropylphenyl)pentane-2,4-diiminate) in toluene afforded the complexes {(BDI<sup>Mes</sup>)CuAl(BDI<sup>Dip</sup>)} and {(BDI<sup>Mes</sup>)CuGa(BDI<sup>Dip</sup>)}. These feature unsupported copper-aluminum or copper-gallium bonds with short metal-metal distances, Cu-Al = 2.3010(6) ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2020, 142(47):19874-19878]

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The young adult service: An evaluation of a youth mental health service in the independent sector in Ireland.

Laura Bond, Paddy Power,

<h4>Aims</h4>Increasing concerns about the specific needs and rates of mental illness among young adults have spurred the development of youth mental health services. Yet few outcome studies exist. This study aims to evaluate a young adult service in an independent mental health sector in Ireland.<h4>Methods</h4>This is a service evaluation using ... Read more >>

Early Interv Psychiatry (Early intervention in psychiatry)
[2020, :]

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Analysis of serum tranexamic acid in patients undergoing open heart surgery.

Josko Ivica, Jeannette Gauthier, Patricia Power, André Lamy, Murray Potter,

<h4>Background</h4>Tranexamic acid is a drug used during open cardiac surgery to prevent blood loss. The blood levels of 10-100 µg/mL are reported to be in the therapeutic range and higher levels are linked to increased incidence of adverse effects. The aim of this study was to optimize and validate an LC-MS/MS ... Read more >>

Clin Biochem (Clinical biochemistry)
[2021, 87:74-78]

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FONA-7, a Novel Extended-Spectrum β-Lactamase Variant of the FONA Family Identified in Serratia fonticola.

Danny Fuentes-Castillo, Pablo Power, Louise Cerdeira, Adriana Cardenas-Arias, Quézia Moura, Flavio A Oliveira, Carlos E Levy, Gabriel Gutkind, José L Catão-Dias, Nilton Lincopan,

<i>Serratia fonticola</i> is a human pathogen widely found in the environment, with birds being reported as possible natural hosts. During an epidemiological and genomic surveillance study conducted to monitor the occurrence of extended-spectrum β-lactamase (ESBL)-producing Enterobacterales in South American wild birds, we identified an ESBL-positive <i>S. fonticola</i> in a fecal ... Read more >>

Microb Drug Resist (Microbial drug resistance (Larchmont, N.Y.))
[2020, :]

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Comparative Kinetic Analysis of OXA-438 with Related OXA-48-Type Carbapenem-Hydrolyzing Class D β-Lactamases.

Denise De Belder, Barbara Ghiglione, Fernando Pasteran, Juan Manuel de Mendieta, Alejandra Corso, Lucrecia Curto, Adriana Di Bella, Gabriel Gutkind, Sonia A Gomez, Pablo Power,

Novel variants of OXA-48-type enzymes with the ability to hydrolyze oxyimino-cephalosporins and carbapenems are increasingly reported. Since its first report in 2011, OXA-163 is now extensively spread throughout Argentina, and several variants like OXA-247 have emerged. Here, we characterized a new <i>bla</i><sub>OXA-48-like</sub> variant, OXA-438, and we performed a comparative kinetic ... Read more >>

ACS Infect Dis (ACS infectious diseases)
[2020, 6(11):3026-3033]

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Feasibility of studying the association between intraoperative regional cerebral oxygen saturation and postoperative functional decline (ReFUNCTION): a pilot sub-study of NeuroVISION-Cardiac Surgery.

Jessica Spence, Andre Lamy, Jackie Bosch, Lehana Thabane, Stephanie Gagnon, Patricia Power, Austin Browne, John Murkin, P J Devereaux,

<h4>Purpose</h4>Function describes an individual's ability to perform everyday activities. In the context of cardiac surgery, functional changes quantify the effect of surgery on one's day-to-day life. Decreases in regional cerebral oxygen saturation (rScO<sub>2</sub>) measured using near-infrared spectroscopy (NIRS) has been associated with postoperative cognitive decline but its relationship with function ... Read more >>

Can J Anaesth (Canadian journal of anaesthesia = Journal canadien d'anesthesie)
[2020, 67(11):1497-1506]

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3)2}3,-Imido-V(═NSiMe3){N(SiMe3)2}3,-and-Imido-Siloxy-V(═NSiMe3)(OSiMe3){N(SiMe3)2}2-Complexes-Derived-from-V{N(SiMe3)2}3-and-Kinetic-Study-of-the-Spontaneous-Conversion-of-the-Oxo-Complex-into-Its-Imido-Siloxy-Isomer.">Characterization of the "Absent" Vanadium Oxo V(═O){N(SiMe3)2}3, Imido V(═NSiMe3){N(SiMe3)2}3, and Imido-Siloxy V(═NSiMe3)(OSiMe3){N(SiMe3)2}2 Complexes Derived from V{N(SiMe3)2}3 and Kinetic Study of the Spontaneous Conversion of the Oxo Complex into Its Imido-Siloxy Isomer.

Cary R Stennett, Thien H Nguyen, Philip P Power,

The synthesis and characterization of V(═O){N(SiMe<sub>3</sub>)<sub>2</sub>}<sub>3</sub> (<b>1</b>), V(═NSiMe<sub>3</sub>){N(SiMe<sub>3</sub>)<sub>2</sub>}<sub>3</sub> (<b>2</b>), and V(═NSiMe<sub>3</sub>)(OSiMe<sub>3</sub>){N(SiMe<sub>3</sub>)<sub>2</sub>}<sub>2</sub> (<b>3</b>) are described. Prior attempts to synthesize the vanadium(V) oxo complex <b>1</b> via salt metathesis of VOCl<sub>3</sub> with the lithium or sodium silylamide salt had yielded either the putative rearranged species V(═NSiMe<sub>3</sub>)(OSiMe<sub>3</sub>){N(SiMe<sub>3</sub>)<sub>2</sub>}<sub>2</sub> (<b>3</b>) or the oxo-bridged, dimetallic {(μ-O)<sub>2</sub>V<sub>2</sub>[N(SiMe<sub>3</sub>)<sub>2</sub>]<sub>4</sub>}. We ... 3)2}3,-Imido-V(═NSiMe3){N(SiMe3)2}3,-and-Imido-Siloxy-V(═NSiMe3)(OSiMe3){N(SiMe3)2}2-Complexes-Derived-from-V{N(SiMe3)2}3-and-Kinetic-Study-of-the-Spontaneous-Conversion-of-the-Oxo-Complex-into-Its-Imido-Siloxy-Isomer.">Read more >>

Inorg Chem (Inorganic chemistry)
[2020, 59(15):11079-11088]

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3)2}3,-Imido-V(═NSiMe3){N(SiMe3)2}3,-and-Imido-Siloxy-V(═NSiMe3)(OSiMe3){N(SiMe3)2}2-Complexes-Derived-from-V{N(SiMe3)2}3-and-Kinetic-Study-of-the-Spontaneous-Conversion-of-the-Oxo-Complex-into-Its-Imido-Siloxy-Isomer.">View full text PDF listing >>



Contemporary occupational therapy philosophy and practice in hospital settings.

Alice Murray, Amelia Di Tommaso, Matthew Molineux, Anna Young, Penny Power,

Background: Occupational therapists have sought to reconnect with the foundations of the profession for many years, and a key focus has been the place of occupation in practice. Existing literature suggests that therapists working in acute settings experience difficulties practicing in ways that centralise occupation.Aim/Objective: This scoping review aimed to ... Read more >>

Scand J Occup Ther (Scandinavian journal of occupational therapy)
[2020, :1-12]

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Second order Jahn-Teller interactions at unusually high molecular orbital energy separations.

Henry B Wedler, Paul Wendelboe, Dean J Tantillo, Philip P Power,

Second order Jahn-Teller (SOJT) effects arise from interactions between filled and empty molecular orbitals of like symmetry. These interactions often lead to structural distortions whose extent is inversely proportional to the energy difference between the interacting orbitals. The main objectives of the work described here are (1) the calculation (using ... Read more >>

Dalton Trans (Dalton transactions (Cambridge, England : 2003))
[2020, 49(16):5175-5182]

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Low-dose IL-2 induces CD56bright NK regulation of T cells via NKp44 and NKp46.

S L McQuaid, S T Loughran, P A Power, P Maguire, A Szczygiel, P A Johnson,

Low-dose interleukin (IL)-2 has shown clinical benefits in patients with autoimmune and inflammatory diseases. Both regulatory T cells (Tregs ) and natural killer (NK) cells are increased in response to low-dose IL-2 immunotherapy. The role of regulatory T cells in autoimmune diseases has been extensively studied; however, NK cells have ... Read more >>

Clin Exp Immunol (Clinical and experimental immunology)
[2020, 200(3):228-241]

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Metathetical Exchange between Metal-Metal Triple Bonds.

Joshua D Queen, Alice C Phung, Christine A Caputo, James C Fettinger, Philip P Power,

The reaction of the molybdenum-molybdenum triple-bonded dimer (CO)2CpMo≡MoCp(CO)2 (Cp = η5-C5H5) with the triple-bonded dimetallynes AriPr4MMAriPr4 or AriPr6MMAriPr6 (AriPr4 = C6H3-2,6-(C6H3-2,6-Pri2)2, AriPr6 = C6H3-2,6-(C6H2-2,4,6-Pri3)2; M = Ge, Sn, or Pb) under mild conditions (≤80 °C, 1 bar) afforded AriPr4M≡MoCp(CO)2 or AriPr6M≡MoCp(CO)2 in moderate to excellent yields. The reactions represent the ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2020, 142(5):2233-2237]

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Unexpected Coordination Complexes of the Metal Tris-silylamides M{N(SiMe3)2}3 (M = Ti, V).

Cary R Stennett, James C Fettinger, Philip P Power,

The synthesis, molecular structures, and spectroscopic details of a series of isocyanide and nitrile complexes of the early first-row transition-metal tris(silyl)amides M{N(SiMe3)2}3 (M = Ti, V) are reported. Previously, first-row transition-metal tris(silyl)amides were generally thought to be incapable of forming complexes with Lewis bases due to their excessive steric crowding. ... Read more >>

Inorg Chem (Inorganic chemistry)
[2020, 59(3):1871-1882]

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Early intervention services for psychosis in Ireland: are we there yet?

P Power,

Early intervention in psychosis (EIP) services are now a priority for Ireland's Health Service Executive (HSE). A Model of Care for EIP services has been completed after wide consultation. It has just been launched by the Minister for Mental Health and the aim now is to roll out EIP services ... Read more >>

Ir J Psychol Med (Irish journal of psychological medicine)
[2019, 36(4):243-248]

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Germanium Hydride Radical Trapped during the Photolysis/Thermolysis of Diarylgermylene.

Lizhi Tao, Ting Yi Lai, Philip P Power, R David Britt,

Herein, we report the characterization of a novel germanium hydride radical arising from the photolysis/thermolysis of the diarylgermylene GeR2 [R = terphenyl: AriPr4 = C6H3-2,6-(C6H3-2,6-iPr2)2 or AriPr6 = C6H3-2,6-(C6H2-2,4,6-iPr3)2] by using electron paramagnetic resonance spectroscopy complemented with theoretical calculations. The trapped germanium radical is a pseudoplanar S = 1/2 germanium(III) ... Read more >>

Inorg Chem (Inorganic chemistry)
[2019, 58(22):15034-15038]

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Isolation and Computational Studies of a Series of Terphenyl Substituted Diplumbynes with Ligand Dependent Lead-Lead Multiple-Bonding Character.

Joshua D Queen, Markus Bursch, Jakob Seibert, Leonard R Maurer, Bobby D Ellis, James C Fettinger, Stefan Grimme, Philip P Power,

A series of formally triply bonded diplumbyne analogues of alkynes of the general formula ArPbPbAr (Ar = terphenyl ligand with different steric properties) was synthesized by two routes. All diplumbyne products were synthesized by a simple reduction of the corresponding Pb(II) halide precursor ArPb(Br) by DIBAL-H with yields in the ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2019, 141(36):14370-14383]

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Structural Insights into the Inhibition of the Extended-Spectrum β-Lactamase PER-2 by Avibactam.

Melina Ruggiero, Krisztina M Papp-Wallace, Florencia Brunetti, Melissa D Barnes, Robert A Bonomo, Gabriel Gutkind, Sebastián Klinke, Pablo Power,

The diazabicyclooctane (DBO) avibactam (AVI) reversibly inactivates most serine-β-lactamases. Previous investigations showed that inhibition constants of AVI toward class A PER-2 are reminiscent of values observed for class C and D β-lactamases (i.e., <i>k</i> <sub>2</sub>/<i>K</i> of ≈10<sup>3</sup> M<sup>-1</sup> s<sup>-1</sup>) but lower than other class A β-lactamases (i.e., <i>k</i> <sub>2</sub>/<i>K</i> = ... Read more >>

Antimicrob Agents Chemother (Antimicrobial agents and chemotherapy)
[2019, 63(9):]

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What IS Inorganic Chemistry?

William B Tolman, Alan L Balch, Suzanne Bart, Brandi Cossairt, Stefanie Dehnen, P Shiv Halasyamani, Hiroshi Kageyama, Franc Meyer, Janet Morrow, Partha Sarathi Mukherjee, Frank Neese, Philip P Power, Roberta Sessoli, Vivian W W Yam, Hong-Cai Zhou,

Inorg Chem (Inorganic chemistry)
[2019, 58(15):9515-9516]

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Reversible Sn-Sn Triple Bond Dissociation in a Distannyne: Support for Charge-Shift Bonding Character.

Ting Yi Lai, Lizhi Tao, R David Britt, Philip P Power,

The tin-tin triple bond in the distannyne Ar<sup><i>i</i>Pr4</sup>SnSnAr<sup><i>i</i>Pr4</sup>, Ar<sup><i>i</i>Pr4</sup> = C<sub>6</sub>H<sub>3</sub>-2,6(C<sub>6</sub>H<sub>3</sub>-2,6-<i>i</i>Pr<sub>2</sub>)<sub>2</sub>, undergoes reversible cleavage in deuterated toluene to afford two :SṅAr<sup><i>i</i>Pr4</sup> radicals in solution as shown by <sup>1</sup>H nuclear magnetic resonance and electron paramagnetic resonance spectroscopy. Variable temperature data afforded an enthalpy of dissociation of Δ<i>H</i><sub>diss</sub> = 17.2 ± 1.7 ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2019, 141(32):12527-12530]

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Two quasi-stable lead(ii) hydrides at ambient temperature.

Joshua D Queen, James C Fettinger, Philip P Power,

Simple reactions of their terphenyl lead bromide precursors with DIBAL-H in diethyl ether solution at ca. -78 °C leads to the isolation of the hydrides {Pb(μ-H)ArPri4}2 (ArPri4 = C6H3-2,6-(C6H3-2,6-Pri2)2) (1) and {Pb(μ-H)ArMe6}2 (ArMe6 = C6H3-2,6-(C6H2-2,4,6-Me3)2) (2) in good yield (60-80%). The isolated solids are stable at up to 5 °C ... Read more >>

Chem Commun (Camb) (Chemical communications (Cambridge, England))
[2019, 55(69):10285-10287]

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Two-Coordinate, Late First-Row Transition Metal Amido Derivatives of the Bulky Ligand -N(SiPr i3)Dipp (Dipp = 2,6-diisopropylphenyl): Effects of the Ligand on the Stability of Two-Coordinate Copper(II) Complexes.

Clifton L Wagner, Lizhi Tao, James C Fettinger, R David Britt, Philip P Power,

The synthesis and spectroscopic, structural, and magnetic characterization of the quasi-linear metal(II) bis(amides) M{N(SiPr <sup>i</sup><sub>3</sub>)Dipp}<sub>2</sub> [Dipp = C<sub>6</sub>H<sub>3</sub>-2,6-Pr <sup>i</sup><sub>3</sub>; M = Fe (1), Co (2), or Zn (3)] are described. The magnetic data demonstrate the impact of metal ligand π-interactions on the magnetic properties of these two-coordinate transition metal amides. ... Read more >>

Inorg Chem (Inorganic chemistry)
[2019, 58(13):8793-8799]

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New Characterization of V{N(SiMe3)2}3: Reductions of Tris[bis(trimethylsilyl)amido]vanadium(III) and -chromium(III) To Afford the Reduced Metal(II) Anions [M{N(SiMe3)2}3]- (M = V and Cr).

Clifton L Wagner, Nathan A Phan, James C Fettinger, Louise A Berben, Philip P Power,

During the preparation of V{N(SiMe<sub>3</sub>)<sub>2</sub>}<sub>3</sub> (1), a discrepancy between the violet color that we observed and the brown color previously reported prompted further investigation of this compound. As a result, a new spectroscopic study and a full structural characterization are presented. The synthesis, spectroscopy, and structural characteristics of its reduced ... Read more >>

Inorg Chem (Inorganic chemistry)
[2019, 58(9):6095-6101]

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Attaining the age threshold for adolescent mental health services: factors associated with transition of care in the independent sector in Ireland.

L Bond, A Feeney, R Collins, I Khurshid, S Healy, A Murtagh, P Power,

<h4>Objectives</h4>The transition from adolescent to adult mental health services (AMHS) is associated with disengagement, poor continuity of care and patient dissatisfaction. The aim of this retrospective and descriptive study was to describe the 'care pathways' in an independent mental health service when adolescents reach age 18 and to investigate the ... Read more >>

Ir J Psychol Med (Irish journal of psychological medicine)
[2019, 36(3):187-193]

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