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Gioilli BD, Kidane TZ, Fieten H, Tellez M, Dalphin M, Nguyen A, Nguyen K, Linder MC. Secretion and Uptake of Copper via a Small Copper Carrier in Blood Fluid. Metallomics 2022; 14:6535625. [PMID: 35199838 PMCID: PMC8962702 DOI: 10.1093/mtomcs/mfac006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 02/02/2022] [Indexed: 11/27/2022]
Abstract
Studies with Wilson disease model mice that accumulate excessive copper, due to a dysfunctional ATP7B “copper pump” resulting in decreased biliary excretion, showed that the compensatory increase in urinary copper loss was due to a small copper carrier (∼1 kDa) (SCC). We show here that SCC is also present in the blood plasma of normal and Wilson disease model mice and dogs, as determined by ultrafiltration and size exclusion chromatography (SEC). It is secreted by cultured hepatic and enterocytic cells, as determined by pretreatment with 67Cu nitrilotriacetate (NTA) or nonradioactive 5–10 μM Cu-NTA, and collecting and examining 3 kDa ultrafiltrates of the conditioned media, where a single major copper peak is detected by SEC. Four different cultured cell types exposed to the radiolabeled SCC all took up the 67Cu at various rates. Rates differed somewhat when uptake was from Cu-NTA. Uptake of SCC-67Cu was inhibited by excess nonradioactive Cu(I) or Ag(I) ions, suggesting competition for uptake by copper transporter 1 (CTR1). Knockout of CTR1 in fibroblasts reduced uptake rates by 60%, confirming its participation, but also involvement of other transporters. Inhibitors of endocytosis, or an excess of metal ions taken up by divalent metal transporter 1, did not decrease SCC-67Cu uptake. The results imply that SCC may play a significant role in copper transport and homeostasis, transferring copper particularly from the liver (but also intestinal cells) to other cells within the mammalian organism, as well as spilling excess into the urine in copper overload—as an alternative means of copper excretion.
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Spadaro O, Youm Y, Shchukina I, Ryu S, Sidorov S, Ravussin A, Nguyen K, Aladyeva E, Predeus AN, Smith SR, Ravussin E, Galban C, Artyomov MN, Dixit VD. Caloric restriction in humans reveals immunometabolic regulators of health span. Science 2022; 375:671-677. [PMID: 35143297 PMCID: PMC10061495 DOI: 10.1126/science.abg7292] [Citation(s) in RCA: 108] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The extension of life span driven by 40% caloric restriction (CR) in rodents causes trade-offs in growth, reproduction, and immune defense that make it difficult to identify therapeutically relevant CR-mimetic targets. We report that about 14% CR for 2 years in healthy humans improved thymopoiesis and was correlated with mobilization of intrathymic ectopic lipid. CR-induced transcriptional reprogramming in adipose tissue implicated pathways regulating mitochondrial bioenergetics, anti-inflammatory responses, and longevity. Expression of the gene Pla2g7 encoding platelet activating factor acetyl hydrolase (PLA2G7) is inhibited in humans undergoing CR. Deletion of Pla2g7 in mice showed decreased thymic lipoatrophy, protection against age-related inflammation, lowered NLRP3 inflammasome activation, and improved metabolic health. Therefore, the reduction of PLA2G7 may mediate the immunometabolic effects of CR and could potentially be harnessed to lower inflammation and extend the health span.
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Nielsen LE, Nguyen K, Wahl CK, Huss JL, Chang D, Ager EP, Hamilton L. Initial Specimen Diversion Device® Reduces Blood Culture Contamination and Vancomycin Use in Academic Medical Center. J Hosp Infect 2021; 120:127-133. [PMID: 34780808 DOI: 10.1016/j.jhin.2021.10.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/21/2021] [Accepted: 10/22/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND In suspected bloodstream infections, accurate blood culture results are critical to timely diagnoses and appropriate antibiotic administration. AIM An Initial Specimen Diversion Device®, Steripath®, (Magnolia Medical Technologies, Seattle, WA) was evaluated for efficacy in reducing blood culture contamination at Brooke Army Medical Center (6.8% six-month contamination rate prior to intervention) in a six-month quality improvement project. METHODS Blood cultures in the emergency department were collected using either Steripath® or the standard method. 20 mL of blood was cultured into an aerobic and anaerobic medium and incubated for five days using an automated microbial detection system immediately after collection. Positive bottles were Gram stained and plated. Rapid molecular PCR identification was performed on all first positive bottles within a blood culture set for each admission or ED visit. Speciation was deduced during antimicrobial sensitivity testing using the Vitek-2 instrument. FINDINGS Seven (7/1016, 0.69%) contamination events occurred when using Steripath® vs. 53 (53/800, 6.6%) contamination events when using the standard method. Steripath® use was associated with a 90% lower incidence of blood culture contamination vs. the standard method. Post-study, Steripath® use was implemented as standard practice hospital-wide, and a retrospective data analysis attributed a 31.4% decrease in vancomycin days of therapy to Steripath® adoption. CONCLUSION Using Steripath® significantly decreased blood culture contamination events for bacterial bloodstream infections compared to the standard method. Subsequent adoption of Steripath® reduced overall vancomycin usage. With widescale implementation Steripath® could bolster antibiotic stewardship, mitigating antibiotic resistance caused by unnecessary antibacterial treatments.
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Nguyen K, Heimall J, Henrickson S, Khurana M, Romberg N, Treat J, Brown-Whitehorn T, Sun D. M164 NOVEL ERBIN VARIANT AND ASSOCIATED SEVERE ECZEMA IN A 3-MONTH-OLD. Ann Allergy Asthma Immunol 2021. [DOI: 10.1016/j.anai.2021.08.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bylund K, Chowdhry A, Nguyen K, Geevarghese S. Effect of Adjuvant Radiation and Chemotherapy in Localized Uterine Carcinosarcoma: A National Cancer Database Analysis. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.1670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nguyen K, Chen X, Hughes T, Hofflich H, Woods G, McCowen K. SURPRISINGLY FEW WOMEN WITH SEVERE OSTEOPOROSIS BY BONE DENSITOMETRY UNDERGO WORKUP FOR SECONDARY CAUSES - A RETROSPECTIVE EVALUATION. ACTA ENDOCRINOLOGICA (BUCHAREST, ROMANIA : 2005) 2021; 17:537-542. [PMID: 35747871 PMCID: PMC9206146 DOI: 10.4183/aeb.2021.537] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
UNLABELLED We describe clinical features of women with extremely low bone density, and investigate secondary causes of osteoporosis. Our hypothesis was that this population would be enriched in identifiable causes of osteoporosis. We performed a retrospective review of medical records of all women seen at our university over 4 years with T-score on bone densitometry at/below -4 at any site. Historical and fracture details were abstracted. We considered a thorough work up to include Vitamin D, PTH, CBC, chemistry panel, cortisol, transglutaminase, myeloma screen, tryptase and 24-hour urine calcium. RESULTS 137 women were identified with T-score at/below -4. Percent identified as Asian was 26% (higher than local prevalence of 8%). Average BMI was 21.6 kg/m2. Clearly identifiable causes of osteoporosis were noted in 57% (inflammatory disorder, glucocorticoid or antacid exposure, prolonged immobilization and alcoholism were most prevalent). Of the remainder, full work up was performed only in 8%. Endocrine consultation and white race predicted thoroughness of secondary work-up. CONCLUSION Fragility fractures, leanness and Asian race were common in women with very low T-score. However, few new causes were identified. Underlying etiology was either immediately evident or inadequately studied, especially in minorities.
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Tran H, Nguyen S, Nguyen K, Pham D, Le A, Nguyen G, Tran D, Shu X, Osarogiagbon R, Tran T. OA18.01 Lung Cancer in Vietnam. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Eidell KP, Lovy A, Sylvain NR, Scangarello FA, Muendlein HI, Ophir MJ, Nguyen K, Seminario MC, Bunnell SC. LFA-1 and kindlin-3 enable the collaborative transport of SLP-76 microclusters by myosin and dynein motors. J Cell Sci 2021; 134:270974. [PMID: 34279667 DOI: 10.1242/jcs.258602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 07/13/2021] [Indexed: 01/10/2023] Open
Abstract
Integrin engagement within the immune synapse enhances T cell activation, but our understanding of this process is incomplete. In response to T cell receptor (TCR) ligation, SLP-76 (LCP2), ADAP (FYB1) and SKAP55 (SKAP1) are recruited into microclusters and activate integrins via the effectors talin-1 and kindlin-3 (FERMT3). We postulated that integrins influence the centripetal transport and signaling of SLP-76 microclusters via these linkages. We show that contractile myosin filaments surround and are co-transported with SLP-76 microclusters, and that TCR ligand density governs the centripetal movement of both structures. Centripetal transport requires formin activity, actomyosin contraction, microtubule integrity and dynein motor function. Although immobilized VLA-4 (α4β1 integrin) and LFA-1 (αLβ2 integrin) ligands arrest the centripetal movement of SLP-76 microclusters and myosin filaments, VLA-4 acts distally, while LFA-1 acts in the lamellum. Integrin β2, kindlin-3 and zyxin are required for complete centripetal transport, while integrin β1 and talin-1 are not. CD69 upregulation is similarly dependent on integrin β2, kindlin-3 and zyxin, but not talin-1. These findings highlight the integration of cytoskeletal systems within the immune synapse and reveal extracellular ligand-independent roles for LFA-1 and kindlin-3. This article has an associated First Person interview with the first author of the paper.
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Aryana A, Panescu D, Spangler T, Sarcon A, Hata C, de la Rama A, Nguyen K, d’Avila A. B-PO05-087 THE IMPACT OF PULSED FIELD ABLATION USING A NOVEL SINGLE-SHOT ABLATION SYSTEM ON THE ADJACENT ESOPHAGUS IN A PORCINE MODEL. Heart Rhythm 2021. [DOI: 10.1016/j.hrthm.2021.06.1006] [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: 10/20/2022]
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Berghoff EG, Glenwinkel L, Bhattacharya A, Sun H, Varol E, Mohammadi N, Antone A, Feng Y, Nguyen K, Cook SJ, Wood JF, Masoudi N, Cros CC, Ramadan YH, Ferkey DM, Hall DH, Hobert O. The Prop1-like homeobox gene unc-42 specifies the identity of synaptically connected neurons. eLife 2021; 10:e64903. [PMID: 34165428 PMCID: PMC8225392 DOI: 10.7554/elife.64903] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 05/17/2021] [Indexed: 12/13/2022] Open
Abstract
Many neuronal identity regulators are expressed in distinct populations of cells in the nervous system, but their function is often analyzed only in specific isolated cellular contexts, thereby potentially leaving overarching themes in gene function undiscovered. We show here that the Caenorhabditis elegans Prop1-like homeobox gene unc-42 is expressed in 15 distinct sensory, inter- and motor neuron classes throughout the entire C. elegans nervous system. Strikingly, all 15 neuron classes expressing unc-42 are synaptically interconnected, prompting us to investigate whether unc-42 controls the functional properties of this circuit and perhaps also the assembly of these neurons into functional circuitry. We found that unc-42 defines the routes of communication between these interconnected neurons by controlling the expression of neurotransmitter pathway genes, neurotransmitter receptors, neuropeptides, and neuropeptide receptors. Anatomical analysis of unc-42 mutant animals reveals defects in axon pathfinding and synaptic connectivity, paralleled by expression defects of molecules involved in axon pathfinding, cell-cell recognition, and synaptic connectivity. We conclude that unc-42 establishes functional circuitry by acting as a terminal selector of functionally connected neuron types. We identify a number of additional transcription factors that are also expressed in synaptically connected neurons and propose that terminal selectors may also function as 'circuit organizer transcription factors' to control the assembly of functional circuitry throughout the nervous system. We hypothesize that such organizational properties of transcription factors may be reflective of not only ontogenetic, but perhaps also phylogenetic trajectories of neuronal circuit establishment.
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Paret N, Ruffin G, Grenet G, Nguyen K, Patat AM, Vial T. Place de la N-acétylcystéine dans la prise en charge retardée des intoxications au paracétamol, une étude observationnelle rétrospective. TOXICOLOGIE ANALYTIQUE ET CLINIQUE 2021. [DOI: 10.1016/j.toxac.2020.10.062] [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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Paret N, Grenet G, Nguyen K, Vial T, Patat AM. Fomépizole : quel schéma thérapeutique recommander ? (Hors dialyse). TOXICOLOGIE ANALYTIQUE ET CLINIQUE 2021. [DOI: 10.1016/j.toxac.2020.10.082] [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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Heck R, Montagner M, Pitts L, Nguyen K, Wert L, Falk V, Kempfert J. 1-Sear Survival after Surgery for Acute Type-A Aortic Dissection in Patients with Previous Cardiac Surgery. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725777] [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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Heck R, Montagner M, Pitts L, Nguyen K, Wert L, Falk V, Kempfert J. Long-Term Survival after Surgery for Type A Aortic Dissection: A Propensity-Matched Analysis for Nighttime versus Daytime Surgery in 1,163 Patients. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725633] [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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Gérard H, Martel H, Viala M, Nguyen K, Richard P, Ader F, Pruny J, Donal E, Eicher J, Huttin O, Selton-Suty C, Raud-Raynier P, Jondeau G, Mansencal N, Sawka C, Casalta A, Michel N, Faivre L, Charron P, Habib G. Prognosis of adults with left ventricular non compaction: Results from a prospective multricentric french study. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2021. [DOI: 10.1016/j.acvdsp.2020.10.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Montagner M, Heck R, Kofler M, Nguyen K, Pitts L, Starck C, Buz S, Falk V, Kempfert J. Iatrogenic Acute Type A Aortic Dissection Occurring during Elective Cardiac Surgery versus Catheter-Based Interventions: A Retrospective Analysis. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725780] [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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Gluschke JG, Seidl J, Lyttleton RW, Nguyen K, Lagier M, Meyer F, Krogstrup P, Nygård J, Lehmann S, Mostert AB, Meredith P, Micolich AP. Integrated bioelectronic proton-gated logic elements utilizing nanoscale patterned Nafion. MATERIALS HORIZONS 2021; 8:224-233. [PMID: 34821301 DOI: 10.1039/d0mh01070g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A central endeavour in bioelectronics is the development of logic elements to transduce and process ionic to electronic signals. Motivated by this challenge, we report fully monolithic, nanoscale logic elements featuring n- and p-type nanowires as electronic channels that are proton-gated by electron-beam patterned Nafion. We demonstrate inverter circuits with state-of-the-art ion-to-electron transduction performance giving DC gain exceeding 5 and frequency response up to 2 kHz. A key innovation facilitating the logic integration is a new electron-beam process for patterning Nafion with linewidths down to 125 nm. This process delivers feature sizes compatible with low voltage, fast switching elements. This expands the scope for Nafion as a versatile patternable high-proton-conductivity element for bioelectronics and other applications requiring nanoengineered protonic membranes and electrodes.
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Boonyasiri A, Jauneikaite E, Brinkac L, Greco C, Lerdlamyong K, Tangkoskul T, Nguyen K, Thamlikitkul V, Fouts D. Genomic epidemiology of carbapenemase-producing Enterobacteriaceae in hospitalised patients in Bangkok, Thailand from 2015 to 2017. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.110] [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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Antonic V, Sajja V, Sousa J, Nguyen K, Alamneh Y, Garry B, Medina-Rojas M, Wilder D, Vuong C, Potter B, Zurawski D, Shearer J, Black C, Demons S, Long J, Tyner S. Evaluation of Blast Overpressure Exposure Effects on Concentration of Antibiotics in Mice. Mil Med 2020; 185:256-262. [PMID: 32074328 DOI: 10.1093/milmed/usz212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE Infection as sequelae to explosion-related injury is an enduring threat to our troops. There are limited data on the effects of blast on antibiotic pharmacokinetics (PK), pharmacodynamics (PD), and efficacy. The observational study presented here is our Institute's first attempt to address this issue by combining our existing interdepartmental blast, infection modeling, and in vivo PK/PD capabilities and was designed to determine the PK effects of blast on the first-line antibiotic, cefazolin, in an in vivo mouse model. METHODS A total of 160 male BALB/c mice were divided to sham and blast (exposed to blast overpressure of 19 psi) in two biological replicates. At 1 hour after blast/sham exposure, the animals received IV injection of cefazolin (328 mg/kg). Animals were euthanized at 3 minutes, 10 minutes, 15 minutes, 30 minutes, 1 hour, 3 hours, 6 hours, or 10 hours after the injection. Plasma and liver were analyzed for concentration of cefazolin using mass-spectrometry. RESULTS We observed increases in the concentration of cefazolin in the plasma and liver of blast exposed animals at later time points and increase in elimination half-life. CONCLUSION Our results indicate that blast-induced physiologic changes significantly influence cefazolin PK and suggest that efficacy could be affected in the context of the blast; assessment of efficacy and PD effects require further investigation. Metabolic changes resulting from blast may influence other classes of antibiotics and other therapeutics used with these injuries. Therefore, this may have important treatment considerations in other areas of military medicine.
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Armstrong W, Thin P, Alano R, Nguyen K, Booker K, Gartmann J, Lok V, Stephanie L, Sonni I, Czernin J, Nickols N, Kishan A, Calais J. Comparison Of Recurrence Patterns After Surgery And Radiation Therapy With 68Ga-PSMA-11 PET/CT In Non-Metastatic Castrate Sensitive Prostate Cancer Patients: A Single Center Post-Hoc Retrospective Analysis In 787 Patients. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.438] [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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Nguyen K, Kazatsky A. M030 RITUXIMAB-INDUCED SERUM SICKNESS IN A PEDIATRIC PATIENT WITH MULTIPLE AUTOIMMUNE DISEASES AND HISTORY OF COVID-19. Ann Allergy Asthma Immunol 2020. [PMCID: PMC7661916 DOI: 10.1016/j.anai.2020.08.202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Grass E, Nguyen K, Mueller K, Naunheim R. 158 Emergency Department Patients Presenting With Spontaneous Pneumomediastinum: A Retrospective Observational Cohort Study. Ann Emerg Med 2020. [DOI: 10.1016/j.annemergmed.2020.09.170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Nguyen K, Trivedi A, Cole M. Association between Receipt of Assistance Accessing Social Programs and Experience of Care for Health Center Patients. Health Serv Res 2020. [DOI: 10.1111/1475-6773.13527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Hamidi R, Aralis H, Bruhn K, Deluca I, Nguyen K, Tran M, Patel M, Patel V, Cotliar J, Tan B, Sofen H, David C. 491 Interim results from a comparative method validation study evaluating the use of digital photographs versus in-person assessment of rosacea. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Selig DJ, DeLuca JP, Li Q, Lin H, Nguyen K, Scott SM, Sousa JC, Vuong CT, Xie LH, Livezey JR. Saccharomyces boulardii CNCM I-745 probiotic does not alter the pharmacokinetics of amoxicillin. Drug Metab Pers Ther 2020; 35:/j/dmdi.ahead-of-print/dmpt-2019-0032/dmpt-2019-0032.xml. [PMID: 32134728 DOI: 10.1515/dmpt-2019-0032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 01/22/2020] [Indexed: 11/15/2022]
Abstract
Background Probiotics are live microbial organisms that provide benefit to the host while co-habitating in the gastrointestinal tract. Probiotics are safe, available over the counter, and have clinical benefit by reducing the number of antibiotic-associated diarrhea days. Prescriptions from providers and direct consumer demand of probiotics appear to be on the rise. Several recent animal studies have demonstrated that probiotics may have significant effect on absorption of co-administered drugs. However, to date, most probiotic-drug interaction studies in animal models have been limited to bacterial probiotics and nonantibiotic drugs. Methods We performed a traditional pharmacokinetic mouse study examining the interactions between a common commercially available yeast probiotic, Saccharomyces boulardii CNCM I-745 (Florastor®) and an orally administered amoxicillin. Results We showed that there were no significant differences in pharmacokinetic parameters (half-life, area under the curve, peak concentrations, time to reach maximum concentration, elimination rate constant) of amoxicillin between the probiotic treated and untreated control groups. Conclusions Altogether, our findings suggest that coadministration or concurrent use of S. boulardii probiotic and amoxicillin would not likely alter the efficacy of amoxicillin therapy.
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