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Swain T, Chavez C, Myers MJ. Effects of swine microRNA mimics on lipopolysaccharide (LPS) induced inflammatory changes in 3D4/21 cells. Res Vet Sci 2022; 150:115-121. [PMID: 35816767 DOI: 10.1016/j.rvsc.2022.06.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 05/07/2022] [Accepted: 06/28/2022] [Indexed: 11/27/2022]
Abstract
There have been limited studies focused on validation of swine microRNAs (miRNA) with mRNA targets. The objective of this study was to validate a defined set of targets using artificial miRNA mimics transfected into cell lines to confirm specific targets of endogenous miRNAs after administration of Escherichia coli lipopolysaccharide (LPS). Sixteen hours after mimic transfection of 3D4/21 cell lines, the cells were stimulated with 1 μg/ml LPS or phosphate-buffered saline (PBS). The cells were harvested and collected at 0, 1, 3, and 8 h post administration. The selected genes DAD1, IL8, and ESR, which are involved in known pathways of inflammation. and are predicted or validated human targets of either miR-146a, let-7a, or miR-22-3p. These were then evaluated by quantitative real-time-PCR (qRT-PCR) to verify microRNA-mRNA interaction in swine. Using the ROX reference dye, mRNA changes in expression were assessed using the comparative CT Method (ΔΔCT method) for normalization against the PBS control group. DAD1 and ESR1 were negatively regulated by miR-22-3p and miR-146a-5p, respectively in 3D4/21 cells after LPS stimulation. However, miR-146a-5p may play an indirect positive regulatory role of both DAD1 and IL8 mRNA expression. Furthermore, we found an inverse relationship between LPS stimulation compared with the let-7a-5p overexpression with DAD1. Our inflammation study provides new evidence on the roles and predicted targets of miR-146a, let-7a, and miR-22-3p in swine.
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Affiliation(s)
- Trevon Swain
- U.S. Food and Drug Administration Center for Veterinary Medicine, Laurel, MD 20708, United States of America
| | - Chris Chavez
- U.S. Food and Drug Administration Center for Veterinary Medicine, Laurel, MD 20708, United States of America
| | - Michael J Myers
- U.S. Food and Drug Administration Center for Veterinary Medicine, Laurel, MD 20708, United States of America.
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Neuman MD, Feng R, Ellenberg SS, Sieber F, Sessler DI, Magaziner J, Elkassabany N, Schwenk ES, Dillane D, Marcantonio ER, Menio D, Ayad S, Hassan M, Stone T, Papp S, Donegan D, Marshall M, Jaffe JD, Luke C, Sharma B, Azim S, Hymes R, Chin KJ, Sheppard R, Perlman B, Sappenfield J, Hauck E, Hoeft MA, Tierney A, Gaskins LJ, Horan AD, Brown T, Dattilo J, Carson JL, Looke T, Bent S, Franco-Mora A, Hedrick P, Newbern M, Tadros R, Pealer K, Vlassakov K, Buckley C, Gavin L, Gorbatov S, Gosnell J, Steen T, Vafai A, Zeballos J, Hruslinski J, Cardenas L, Berry A, Getchell J, Quercetti N, Bajracharya G, Billow D, Bloomfield M, Cuko E, Elyaderani MK, Hampton R, Honar H, Khoshknabi D, Kim D, Krahe D, Lew MM, Maheshwer CB, Niazi A, Saha P, Salih A, de Swart RJ, Volio A, Bolkus K, DeAngelis M, Dodson G, Gerritsen J, McEniry B, Mitrev L, Kwofie MK, Belliveau A, Bonazza F, Lloyd V, Panek I, Dabiri J, Chavez C, Craig J, Davidson T, Dietrichs C, Fleetwood C, Foley M, Getto C, Hailes S, Hermes S, Hooper A, Koener G, Kohls K, Law L, Lipp A, Losey A, Nelson W, Nieto M, Rogers P, Rutman S, Scales G, Sebastian B, Stanciu T, Lobel G, Giampiccolo M, Herman D, Kaufman M, Murphy B, Pau C, Puzio T, Veselsky M, Apostle K, Boyer D, Fan BC, Lee S, Lemke M, Merchant R, Moola F, Payne K, Perey B, Viskontas D, Poler M, D'Antonio P, O'Neill G, Abdullah A, Fish-Fuhrmann J, Giska M, Fidkowski C, Guthrie ST, Hakeos W, Hayes L, Hoegler J, Nowak K, Beck J, Cuff J, Gaski G, Haaser S, Holzman M, Malekzadeh AS, Ramsey L, Schulman J, Schwartzbach C, Azefor T, Davani A, Jaberi M, Masear C, Haider SB, Chungu C, Ebrahimi A, Fikry K, Marcantonio A, Shelvan A, Sanders D, Clarke C, Lawendy A, Schwartz G, Garg M, Kim J, Caruci J, Commeh E, Cuevas R, Cuff G, Franco L, Furgiuele D, Giuca M, Allman M, Barzideh O, Cossaro J, D'Arduini A, Farhi A, Gould J, Kafel J, Patel A, Peller A, Reshef H, Safur M, Toscano F, Tedore T, Akerman M, Brumberger E, Clark S, Friedlander R, Jegarl A, Lane J, Lyden JP, Mehta N, Murrell MT, Painter N, Ricci W, Sbrollini K, Sharma R, Steel PAD, Steinkamp M, Weinberg R, Wellman DS, Nader A, Fitzgerald P, Ritz M, Bryson G, Craig A, Farhat C, Gammon B, Gofton W, Harris N, Lalonde K, Liew A, Meulenkamp B, Sonnenburg K, Wai E, Wilkin G, Troxell K, Alderfer ME, Brannen J, Cupitt C, Gerhart S, McLin R, Sheidy J, Yurick K, Chen F, Dragert K, Kiss G, Malveaux H, McCloskey D, Mellender S, Mungekar SS, Noveck H, Sagebien C, Biby L, McKelvy G, Richards A, Abola R, Ayala B, Halper D, Mavarez A, Rizwan S, Choi S, Awad I, Flynn B, Henry P, Jenkinson R, Kaustov L, Lappin E, McHardy P, Singh A, Donnelly J, Gonzalez M, Haydel C, Livelsberger J, Pazionis T, Slattery B, Vazquez-Trejo M, Baratta J, Cirullo M, Deiling B, Deschamps L, Glick M, Katz D, Krieg J, Lessin J, Mojica J, Torjman M, Jin R, Salpeter MJ, Powell M, Simmons J, Lawson P, Kukreja P, Graves S, Sturdivant A, Bryant A, Crump SJ, Verrier M, Green J, Menon M, Applegate R, Arias A, Pineiro N, Uppington J, Wolinsky P, Gunnett A, Hagen J, Harris S, Hollen K, Holloway B, Horodyski MB, Pogue T, Ramani R, Smith C, Woods A, Warrick M, Flynn K, Mongan P, Ranganath Y, Fernholz S, Ingersoll-Weng E, Marian A, Seering M, Sibenaller Z, Stout L, Wagner A, Walter A, Wong C, Orwig D, Goud M, Helker C, Mezenghie L, Montgomery B, Preston P, Schwartz JS, Weber R, Fleisher LA, Mehta S, Stephens-Shields AJ, Dinh C, Chelly JE, Goel S, Goncz W, Kawabe T, Khetarpal S, Monroe A, Shick V, Breidenstein M, Dominick T, Friend A, Mathews D, Lennertz R, Sanders R, Akere H, Balweg T, Bo A, Doro C, Goodspeed D, Lang G, Parker M, Rettammel A, Roth M, White M, Whiting P, Allen BFS, Baker T, Craven D, McEvoy M, Turnbo T, Kates S, Morgan M, Willoughby T, Weigel W, Auyong D, Fox E, Welsh T, Cusson B, Dobson S, Edwards C, Harris L, Henshaw D, Johnson K, McKinney G, Miller S, Reynolds J, Segal BS, Turner J, VanEenenaam D, Weller R, Lei J, Treggiari M, Akhtar S, Blessing M, Johnson C, Kampp M, Kunze K, O'Connor M, Looke T, Tadros R, Vlassakov K, Cardenas L, Bolkus K, Mitrev L, Kwofie MK, Dabiri J, Lobel G, Poler M, Giska M, Sanders D, Schwartz G, Giuca M, Tedore T, Nader A, Bryson G, Troxell K, Kiss G, Choi S, Powell M, Applegate R, Warrick M, Ranganath Y, Chelly JE, Lennertz R, Sanders R, Allen BFS, Kates S, Weigel W, Li J, Wijeysundera DN, Kheterpal S, Moore RH, Smith AK, Tosi LL, Looke T, Mehta S, Fleisher L, Hruslinski J, Ramsey L, Langlois C, Mezenghie L, Montgomery B, Oduwole S, Rose T. Pain, Analgesic Use, and Patient Satisfaction With Spinal Versus General Anesthesia for Hip Fracture Surgery : A Randomized Clinical Trial. Ann Intern Med 2022; 175:952-960. [PMID: 35696684 DOI: 10.7326/m22-0320] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND The REGAIN (Regional versus General Anesthesia for Promoting Independence after Hip Fracture) trial found similar ambulation and survival at 60 days with spinal versus general anesthesia for hip fracture surgery. Trial outcomes evaluating pain, prescription analgesic use, and patient satisfaction have not yet been reported. OBJECTIVE To compare pain, analgesic use, and satisfaction after hip fracture surgery with spinal versus general anesthesia. DESIGN Preplanned secondary analysis of a pragmatic randomized trial. (ClinicalTrials.gov: NCT02507505). SETTING 46 U.S. and Canadian hospitals. PARTICIPANTS Patients aged 50 years or older undergoing hip fracture surgery. INTERVENTION Spinal or general anesthesia. MEASUREMENTS Pain on postoperative days 1 through 3; 60-, 180-, and 365-day pain and prescription analgesic use; and satisfaction with care. RESULTS A total of 1600 patients were enrolled. The average age was 78 years, and 77% were women. A total of 73.5% (1050 of 1428) of patients reported severe pain during the first 24 hours after surgery. Worst pain over the first 24 hours after surgery was greater with spinal anesthesia (rated from 0 [no pain] to 10 [worst pain imaginable]; mean difference, 0.40 [95% CI, 0.12 to 0.68]). Pain did not differ across groups at other time points. Prescription analgesic use at 60 days occurred in 25% (141 of 563) and 18.8% (108 of 574) of patients assigned to spinal and general anesthesia, respectively (relative risk, 1.33 [CI, 1.06 to 1.65]). Satisfaction was similar across groups. LIMITATION Missing outcome data and multiple outcomes assessed. CONCLUSION Severe pain is common after hip fracture. Spinal anesthesia was associated with more pain in the first 24 hours after surgery and more prescription analgesic use at 60 days compared with general anesthesia. PRIMARY FUNDING SOURCE Patient-Centered Outcomes Research Institute.
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Affiliation(s)
- Mark D Neuman
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, and Center for Perioperative Outcomes Research and Transformation, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (M.D.N., N.E., L.J.G.)
| | - Rui Feng
- Department of Biostatistics, Epidemiology, and Informatics, and Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (R.F., S.S.E.)
| | - Susan S Ellenberg
- Department of Biostatistics, Epidemiology, and Informatics, and Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (R.F., S.S.E.)
| | - Frederick Sieber
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins Medical Institutions, Baltimore, Maryland (F.S.)
| | - Daniel I Sessler
- Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio (D.I.S., S. Ayad, M.H.)
| | - Jay Magaziner
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland (J.M.)
| | - Nabil Elkassabany
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, and Center for Perioperative Outcomes Research and Transformation, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (M.D.N., N.E., L.J.G.)
| | - Eric S Schwenk
- Department of Anesthesiology, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, Pennsylvania (E.S.S.)
| | - Derek Dillane
- Department of Anesthesiology and Pain Medicine, University of Alberta Hospital, Edmonton, Alberta, Canada (D. Dillane)
| | - Edward R Marcantonio
- Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts (E.R.M.)
| | - Diane Menio
- Center for Advocacy for the Rights and Interests of the Elderly, Philadelphia, Pennsylvania (D.M.)
| | - Sabry Ayad
- Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio (D.I.S., S. Ayad, M.H.)
| | - Manal Hassan
- Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio (D.I.S., S. Ayad, M.H.)
| | - Trevor Stone
- Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada (T.S.)
| | - Steven Papp
- Division of Orthopaedics, Ottawa Hospital Civic Campus, Ottawa, Ontario, Canada (S.P.)
| | - Derek Donegan
- Department of Orthopaedic Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (D. Donegan)
| | - Mitchell Marshall
- Department of Anesthesiology, New York University Langone Medical Center, New York, New York (M.M.)
| | - J Douglas Jaffe
- Department of Anesthesiology, Wake Forest School of Medicine, Winston-Salem, North Carolina (J.D.J.)
| | - Charles Luke
- Department of Anesthesiology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania (C.L.)
| | - Balram Sharma
- Department of Anesthesiology, Lahey Hospital and Medical Center, Burlington, Massachusetts (B.S.)
| | - Syed Azim
- Department of Anesthesiology, Stony Brook University, Stony Brook, New York (S. Azim)
| | - Robert Hymes
- Department of Orthopedic Surgery, Inova Fairfax Medical Campus, Falls Church, Virginia (R.H.)
| | - Ki-Jinn Chin
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada (K.C.)
| | - Richard Sheppard
- Department of Anesthesiology, Hartford Hospital, Hartford, Connecticut (R.S.)
| | - Barry Perlman
- Oregon Health and Science University, Portland, Oregon (B.P.)
| | - Joshua Sappenfield
- Department of Anesthesiology, University of Florida College of Medicine, Gainesville, Florida (J.S.)
| | - Ellen Hauck
- Department of Anesthesiology, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania (E.H.)
| | - Mark A Hoeft
- Department of Anesthesiology, University of Vermont Larner College of Medicine, Burlington, Vermont (M.A.H.)
| | - Ann Tierney
- Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (A.T., T.B., J.D.)
| | - Lakisha J Gaskins
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, and Center for Perioperative Outcomes Research and Transformation, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (M.D.N., N.E., L.J.G.)
| | - Annamarie D Horan
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, and Department of Orthopaedic Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (A.D.H.)
| | - Trina Brown
- Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (A.T., T.B., J.D.)
| | - James Dattilo
- Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (A.T., T.B., J.D.)
| | - Jeffrey L Carson
- Division of General Internal Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey (J.L.C.)
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Katzelnick LC, Escoto AC, Huang AT, Garcia-Carreras B, Chowdhury N, Berry IM, Chavez C, Buchy P, Duong V, Dussart P, Gromowski G, Macareo L, Thaisomboonsuk B, Fernandez S, Smith DJ, Jarman R, Whitehead SS, Salje H, Cummings DA. Antigenic evolution of dengue viruses over 20 years. Science 2021; 374:999-1004. [PMID: 34793238 PMCID: PMC8693836 DOI: 10.1126/science.abk0058] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Infection with one of dengue viruses 1 to 4 (DENV1-4) induces protective antibodies against homotypic infection. However, a notable feature of dengue viruses is the ability to use preexisting heterotypic antibodies to infect Fcγ receptor–bearing immune cells, leading to higher viral load and immunopathological events that augment disease. We tracked the antigenic dynamics of each DENV serotype by using 1944 sequenced isolates from Bangkok, Thailand, between 1994 and 2014 (348 strains), in comparison with regional and global DENV antigenic diversity (64 strains). Over the course of 20 years, the Thailand DENV serotypes gradually evolved away from one another. However, for brief periods, the serotypes increased in similarity, with corresponding changes in epidemic magnitude. Antigenic evolution within a genotype involved a trade-off between two types of antigenic change (within-serotype and between-serotype), whereas genotype replacement resulted in antigenic change away from all serotypes. These findings provide insights into theorized dynamics in antigenic evolution.
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Affiliation(s)
- Leah C. Katzelnick
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32611, United States
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, United States
| | - Ana Coello Escoto
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32611, United States
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, United States
| | - Angkana T. Huang
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32611, United States
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Bernardo Garcia-Carreras
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32611, United States
| | - Nayeem Chowdhury
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32611, United States
| | - Irina Maljkovic Berry
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, 20910, United States
| | - Chris Chavez
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32611, United States
| | - Philippe Buchy
- GlaxoSmithKline (GSK) Vaccines, 637421 Singapore, Singapore
| | - Veasna Duong
- Institut Pasteur in Cambodia, Réseau International des Instituts Pasteur, Phnom Penh 12201, Cambodia
| | - Philippe Dussart
- Institut Pasteur in Cambodia, Réseau International des Instituts Pasteur, Phnom Penh 12201, Cambodia
| | - Gregory Gromowski
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, 20910, United States
| | - Louis Macareo
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Butsaya Thaisomboonsuk
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Stefan Fernandez
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Derek J. Smith
- Department of Zoology, University of Cambridge, Cambridge, CB2 3EJ, United Kingdom
| | - Richard Jarman
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, 20910, United States
| | - Stephen S. Whitehead
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, United States
| | - Henrik Salje
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32611, United States
- Department of Genetics, University of Cambridge, Cambridge, CB2 3EJ, United Kingdom
| | - Derek A.T. Cummings
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32611, United States
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Yu JN, Angeles CB, Lim HG, Chavez C, Roxas-Rosete C. Cutaneous reactions to inactivated SARS-CoV-2 vaccine and ChAdOx1-S (recombinant) vaccine against SARS-CoV-2: a case series from the Philippines. J Eur Acad Dermatol Venereol 2021; 35:e841-e845. [PMID: 34363713 PMCID: PMC8447028 DOI: 10.1111/jdv.17575] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 07/28/2021] [Indexed: 12/31/2022]
Affiliation(s)
- J N Yu
- Skin and Cancer Foundation, Inc., Pasig, Philippines
| | - C B Angeles
- University of the East Ramon Magsaysay Memorial Medical Center, Quezon City, Philippines
| | - H G Lim
- Cebu Institute of Medicine, Cebu City, Philippines
| | - C Chavez
- Rizal Medical Center, Pasig, Philippines
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Feldsine PT, Mui LA, Forgey RL, Kerr DE, Al-Hasani S, Arling V, Beatty S, Bohannon J, Brannan J, Brown N, Bryant J, Burford M, Chavez C, Chinault K, Cooan N, Copeland F, Dixon L, Fitzgerald S, Franke W, Frissora R, Gailbreath K, Godon S, Good M, Ha T, Hagen H, Hanson S, Johnson K, Koch S, Leung S, Lienau A, Lin J, Lin S, Marolla B, Maycock L, McDonagh S, Miller L, Otten N, Post R, Resutek J, Rice B, Richter D, Ritger C, Schwantes D, Simon J, Smith J, Smith S, Stokes R, Thibideau J, Tuncan E, Uber D, Van Landingham V, Vrana D, West D. Equivalence of Assurance® Gold Enzyme Immunoassay for Visual or Instrumental Detection of Motile and Nonmotile Salmonella in All Foods to AOAC Culture Method: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/83.4.871] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Six foods representative of a wide variety of processed, dried powder processed, and raw food types were analyzed by the Assurance® Gold Salmonella Enzyme Immunoassay (EIA) and AOAC INTERNATIONAL culture method. Paired samples of each food type were simultaneously analyzed; one sample by the Assurance method and one by the AOAC culture method. The results for Assurance method were read visually and instrumentally with a microplate reader. A total of 24 laboratories representing federal government agencies and private industry, in the United States and Canada, participated in this collaborative study. Food types were inoculated with species of Salmonella with the exception of raw ground chicken, which was naturally contaminated. No statistical differences (p < 0.05) were observed between Assurance Gold Salmonella EIA with either visual or instrumental interpretation and the AOAC culture method for any inoculation level of any food type or naturally contaminated food. The Assurance visual and instrumental options of reading sample reactions produced the same results for 1277 of the 1296 sample and controls analyzed.
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Affiliation(s)
| | - Linda A Mui
- BioControl Systems, Inc., 12822 SE 32nd St, Bellevue, WA 98005
| | - Robin L Forgey
- BioControl Systems, Inc., 12822 SE 32nd St, Bellevue, WA 98005
| | - David E Kerr
- BioControl Systems, Inc., 12822 SE 32nd St, Bellevue, WA 98005
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Castaneda CA, Castillo M, Torres-Cabala C, Bernabe LA, Casavilca S, Villegas V, Sanchez J, de la Cruz M, Dunstan J, Cotrina JM, Gomez HL, Chavez C, Landa-Baella MP, Tello K, Felix BF, Abugattas J. Relationship between tumor-associated immune infiltrate and p16 staining over clinicopathological features in acral lentiginous melanoma. Clin Transl Oncol 2019; 21:1127-1134. [PMID: 30778854 DOI: 10.1007/s12094-019-02033-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 01/01/2019] [Indexed: 01/03/2023]
Abstract
PURPOSE This study aims to evaluate the association between composition of tumor-infiltrating lymphocytes (TIL) and expression of p16 in acral lentiginous melanoma (ALM), and their impact on prognosis. MATERIALS AND METHODS A cohort of 148 surgical pathology specimens of ALM was studied. TIL were evaluated by immunohistochemical detection of CD3 and CD8, along with CD20, CD4, CD68, and CD163 in a subset of 43 cases. p16 protein expression was also investigated in all the cases. RESULTS The median age was 66 years, median Breslow thickness was 6.0 mm, grade III TIL was found in 28.4% and lymph nodes were involved in 54.2%. Breslow thickness (p < 0.001), stage I-II (p < 0.001), negative lymph nodes (p < 0.001) and < 10% p16 (p = 0.01) were associated with longer survival. Grade III of TIL was associated with thinner Breslow thickness (p = 0.008) and lower mitosis (p = 0.047). A higher density of CD3 TIL was associated with male gender (p = 0.008), thinner Breslow thickness (p = 0.047), negative lymph node (p = 0.031), early stage (p = 0.046), and p16 nuclear expression of > 10% (p = 0.045). Higher CD8 TIL was associated with > p16 (p = 0.03). Survival analysis found that longer survival had a trend to be associated with high TIL (p = 0.090). Levels of CD3+ and CD8+ cells were correlated with those of CD4+, CD20+, CD68+ and CD163+ immune cells. CONCLUSIONS Higher levels of TIL tend to be associated with better overall survival in ALM. Loss of expression of p16 is associated with lower levels of CD3+ and CD8+ TIL, indicating a probable relationship between p16 and TIL immune response in ALM .
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Affiliation(s)
- C A Castaneda
- Medical Oncology Department and Research Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru.
- Faculty of Medicine, Universidad Privada San Juan Bautista, 15067, Lima, Peru.
| | - M Castillo
- Medical Oncology Department and Research Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - C Torres-Cabala
- Departments of Pathology and Dermatology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - L A Bernabe
- Medical Oncology Department and Research Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - S Casavilca
- Pathology Department, Instituto Nacional de Enfermedades Neoplasicas., Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - V Villegas
- Medical Oncology Department and Research Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - J Sanchez
- Medical Oncology Department and Research Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - M de la Cruz
- Breast Cancer Surgery Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - J Dunstan
- Breast Cancer Surgery Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - J M Cotrina
- Breast Cancer Surgery Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - H L Gomez
- Medical Oncology Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - C Chavez
- Medical Oncology Department and Research Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - M P Landa-Baella
- Medical Oncology Department and Research Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - K Tello
- Medical Oncology Department and Research Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - B F Felix
- Medical Oncology Department and Research Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
| | - J Abugattas
- Breast Cancer Surgery Department, Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos Este 2520 Surquillo, 15038, Lima, Peru
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Hamann H, Lee S, Browning T, Chavez C, Sanders J, Abbara S, Balis D, Chiu H, Moran B, Santini N, Gerber D. MA02.10 The First Year of Implementing a Lung Cancer Screening Program in an Urban Safety-Net Health System. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Rodriguez Gonzalez V, Perez-Regadera J, Lora D, Campos A, Chavez C, Gil B, Prados R, Colmenero M. EP-1315: Abdominopelvic Radiotherapy for advanced endometrial cancer after surgery and chemotherapy: results. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32565-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Song X, Pak M, Chavez C, Liang M, Lu H, Blake-Haskins A, Robbins P, Jin X, Gupta A, Roskos L, Narwal R. 203 Population pharmacokinetics of MEDI4736, a fully human antiprogrammed death ligand 1 (PD-L1) monoclonal antibody, in patients with advanced solid tumors. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30091-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zem G, Tosunyan O, Hambarsoomian A, Lim K, Khatiblou K, Niamat S, Choi E, Monroy C, Chavez M, Karaan N, Basmajian M, Kim S, Kurginyan A, Sorooshiani S, Manzo L, Bahri F, Holverson A, Chacon G, Allatabakhsh N, Irikyan C, Tortorice C, Balyan S, Amer N, Shtivelman S, Vahdati V, Kaur T, Danialian S, Allard A, Jorshari L, Kazmi N, Sarkissian N, Mkhitarian K, Chavez C, Havaei M, Adzhemian A, Takakura M, Huang Y, Haritounian A, Arakelian A, Bohorquez J, Asatryan M, Herrera Y, Mayorga L, Garcia A, Oppenheimer S. Hierarchy of Anti‐Clumping Salts. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.925.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Zem G, Arvizu S, Ter‐Papyan H, Sadeghi H, Hovsepian G, Hambarsoomian A, Evans A, Chavez C, Tivriktsyan A, Tortorice C, Ohanessian K, Orujyan A, Irikyan C, Molina D, Behshadpour A, Markosian S, Boyadjian Z, Salas N, Basmajian M, Aminian P, Patel K, Haritounian A, Kurginyan A, Sheikhpoor B, Sarkissian L, Tosunyan O, Simidyan A, Mikaelyan H, Bardo M, Simonyan K, Yahya‐Kashani D, Labson K, Asatryan M, Gyurgchyan T, Oppenheimer S. A possible cell surface mechanism for magnesium sulfate's antithrombocytic activity (833.1). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.833.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Laconi MR, Chavez C, Cavicchia JC, Fóscolo M, Sosa Z, Yunes RF, Cabrera RJ. Allopregnanolone alters the luteinizing hormone, prolactin, and progesterone serum levels interfering with the regression and apoptosis in rat corpus luteum. Horm Metab Res 2012; 44:632-8. [PMID: 22674474 DOI: 10.1055/s-0032-1314834] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Steroids synthesized in the central nervous system are termed "neurosteroids". They are synthesized and metabolized in several brain areas. The objective of this work was to determine if 1 intracerebroventricular allopregnanolone injection in rats can interfere in luteal regression in a close relationship with modifications in LH, progesterone, and prolactin serum concentrations. Allopregnanolone was injected during proestrus morning and the animals were sacrificed on oestrous morning. Ovulation test and histological analysis were performed in the oestrus morning with light and electron microscopy. Serum prolactin, LH, and progesterone levels were measured by radioimmunoassay. The allopregnanolone injection significantly decreased luteinizing hormone serum level and the number of oocytes on oestrus. Progesterone and prolactin serum levels were increased after this injection. The inhibition of apoptotic figures due to allopregnanolone administration was detected in the already formed corpora lutea belonging to the previous ovary cycle and it was significantly lower than in vehicle group (control). When the GABA(A) antagonist (bicuculline) was administered alone or previously to allopregnanolone, no effect on the ovulation rate was observed. No changes in the apoptotic cell numbers were observed with respect to those of vehicle group. These results show that the effect of centrally injected allopreganolone over reproductive function could be due to a centrally originated LH mediated effect over ovarian function that affects luteal regression, through the inhibition of apoptosis and stimulation of progesterone and prolactin release.
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Affiliation(s)
- M R Laconi
- Instituto de Investigaciones Biomédicas, IMBECU-CONICET, Facultad de Ciencias Médicas, Universidad de Mendoza, Mendoza, Argentina.
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Ski C, Chavez C, Jelinek M, Reid J, Thompson D. Psychosocial Interventions for Coronary Heart Disease and Depression: A Systematic Review and Meta-Analysis. Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abe K, Abgrall N, Ajima Y, Aihara H, Albert JB, Andreopoulos C, Andrieu B, Aoki S, Araoka O, Argyriades J, Ariga A, Ariga T, Assylbekov S, Autiero D, Badertscher A, Barbi M, Barker GJ, Barr G, Bass M, Bay F, Bentham S, Berardi V, Berger BE, Bertram I, Besnier M, Beucher J, Beznosko D, Bhadra S, Blaszczyk FDMM, Blondel A, Bojechko C, Bouchez J, Boyd SB, Bravar A, Bronner C, Brook-Roberge DG, Buchanan N, Budd H, Calvet D, Cartwright SL, Carver A, Castillo R, Catanesi MG, Cazes A, Cervera A, Chavez C, Choi S, Christodoulou G, Coleman J, Coleman W, Collazuol G, Connolly K, Curioni A, Dabrowska A, Danko I, Das R, Davies GS, Davis S, Day M, De Rosa G, de André JPAM, de Perio P, Delbart A, Densham C, Di Lodovico F, Di Luise S, Dinh Tran P, Dobson J, Dore U, Drapier O, Dufour F, Dumarchez J, Dytman S, Dziewiecki M, Dziomba M, Emery S, Ereditato A, Escudero L, Esposito LS, Fechner M, Ferrero A, Finch AJ, Frank E, Fujii Y, Fukuda Y, Galymov V, Gannaway FC, Gaudin A, Gendotti A, George MA, Giffin S, Giganti C, Gilje K, Golan T, Goldhaber M, Gomez-Cadenas JJ, Gonin M, Grant N, Grant A, Gumplinger P, Guzowski P, Haesler A, Haigh MD, Hamano K, Hansen C, Hansen D, Hara T, Harrison PF, Hartfiel B, Hartz M, Haruyama T, Hasegawa T, Hastings NC, Hastings S, Hatzikoutelis A, Hayashi K, Hayato Y, Hearty C, Helmer RL, Henderson R, Higashi N, Hignight J, Hirose E, Holeczek J, Horikawa S, Hyndman A, Ichikawa AK, Ieki K, Ieva M, Iida M, Ikeda M, Ilic J, Imber J, Ishida T, Ishihara C, Ishii T, Ives SJ, Iwasaki M, Iyogi K, Izmaylov A, Jamieson B, Johnson RA, Joo KK, Jover-Manas GV, Jung CK, Kaji H, Kajita T, Kakuno H, Kameda J, Kaneyuki K, Karlen D, Kasami K, Kato I, Kearns E, Khabibullin M, Khanam F, Khotjantsev A, Kielczewska D, Kikawa T, Kim J, Kim JY, Kim SB, Kimura N, Kirby B, Kisiel J, Kitching P, Kobayashi T, Kogan G, Koike S, Konaka A, Kormos LL, Korzenev A, Koseki K, Koshio Y, Kouzuma Y, Kowalik K, Kravtsov V, Kreslo I, Kropp W, Kubo H, Kudenko Y, Kulkarni N, Kurjata R, Kutter T, Lagoda J, Laihem K, Laveder M, Lee KP, Le PT, Levy JM, Licciardi C, Lim IT, Lindner T, Litchfield RP, Litos M, Longhin A, Lopez GD, Loverre PF, Ludovici L, Lux T, Macaire M, Mahn K, Makida Y, Malek M, Manly S, Marchionni A, Marino AD, Marteau J, Martin JF, Maruyama T, Maryon T, Marzec J, Masliah P, Mathie EL, Matsumura C, Matsuoka K, Matveev V, Mavrokoridis K, Mazzucato E, McCauley N, McFarland KS, McGrew C, McLachlan T, Messina M, Metcalf W, Metelko C, Mezzetto M, Mijakowski P, Miller CA, Minamino A, Mineev O, Mine S, Missert AD, Mituka G, Miura M, Mizouchi K, Monfregola L, Moreau F, Morgan B, Moriyama S, Muir A, Murakami A, Murdoch M, Murphy S, Myslik J, Nakadaira T, Nakahata M, Nakai T, Nakajima K, Nakamoto T, Nakamura K, Nakayama S, Nakaya T, Naples D, Navin ML, Nelson B, Nicholls TC, Nishikawa K, Nishino H, Nowak JA, Noy M, Obayashi Y, Ogitsu T, Ohhata H, Okamura T, Okumura K, Okusawa T, Oser SM, Otani M, Owen RA, Oyama Y, Ozaki T, Pac MY, Palladino V, Paolone V, Paul P, Payne D, Pearce GF, Perkin JD, Pettinacci V, Pierre F, Poplawska E, Popov B, Posiadala M, Poutissou JM, Poutissou R, Przewlocki P, Qian W, Raaf JL, Radicioni E, Ratoff PN, Raufer TM, Ravonel M, Raymond M, Retiere F, Robert A, Rodrigues PA, Rondio E, Roney JM, Rossi B, Roth S, Rubbia A, Ruterbories D, Sabouri S, Sacco R, Sakashita K, Sánchez F, Sarrat A, Sasaki K, Scholberg K, Schwehr J, Scott M, Scully DI, Seiya Y, Sekiguchi T, Sekiya H, Shibata M, Shimizu Y, Shiozawa M, Short S, Siyad M, Smith RJ, Smy M, Sobczyk JT, Sobel H, Sorel M, Stahl A, Stamoulis P, Steinmann J, Still B, Stone J, Strabel C, Sulak LR, Sulej R, Sutcliffe P, Suzuki A, Suzuki K, Suzuki S, Suzuki SY, Suzuki Y, Suzuki Y, Szeglowski T, Szeptycka M, Tacik R, Tada M, Takahashi S, Takeda A, Takenaga Y, Takeuchi Y, Tanaka K, Tanaka HA, Tanaka M, Tanaka MM, Tanimoto N, Tashiro K, Taylor I, Terashima A, Terhorst D, Terri R, Thompson LF, Thorley A, Toki W, Tomaru T, Totsuka Y, Touramanis C, Tsukamoto T, Tzanov M, Uchida Y, Ueno K, Vacheret A, Vagins M, Vasseur G, Wachala T, Walding JJ, Waldron AV, Walter CW, Wanderer PJ, Wang J, Ward MA, Ward GP, Wark D, Wascko MO, Weber A, Wendell R, West N, Whitehead LH, Wikström G, Wilkes RJ, Wilking MJ, Wilson JR, Wilson RJ, Wongjirad T, Yamada S, Yamada Y, Yamamoto A, Yamamoto K, Yamanoi Y, Yamaoka H, Yanagisawa C, Yano T, Yen S, Yershov N, Yokoyama M, Zalewska A, Zalipska J, Zambelli L, Zaremba K, Ziembicki M, Zimmerman ED, Zito M, Żmuda J. Indication of electron neutrino appearance from an accelerator-produced off-axis muon neutrino beam. Phys Rev Lett 2011; 107:041801. [PMID: 21866992 DOI: 10.1103/physrevlett.107.041801] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Indexed: 05/31/2023]
Abstract
The T2K experiment observes indications of ν(μ) → ν(e) appearance in data accumulated with 1.43×10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Δm(23)(2)| = 2.4×10(-3) eV(2), sin(2)2θ(23) = 1 and sin(2)2θ(13) = 0, the expected number of such events is 1.5±0.3(syst). Under this hypothesis, the probability to observe six or more candidate events is 7×10(-3), equivalent to 2.5σ significance. At 90% C.L., the data are consistent with 0.03(0.04) < sin(2)2θ(13) < 0.28(0.34) for δ(CP) = 0 and a normal (inverted) hierarchy.
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Affiliation(s)
- K Abe
- University of Tokyo, Institute for Cosmic Ray Research, Kamioka Observatory, Kamioka, Japan
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Guerif F, Frapsauce C, Chavez C, Cadoret V, Royere D. Treating women under 36 years old without top-quality embryos on day 2: a prospective study comparing double embryo transfer with single blastocyst transfer. Hum Reprod 2011; 26:775-81. [DOI: 10.1093/humrep/der020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Guerif F, Lemseffer M, Leger J, Bidault R, Cadoret V, Chavez C, Gasnier O, Saussereau M, Royere D. Does early morphology provide additional selection power to blastocyst selection for transfer? Reprod Biomed Online 2010; 21:510-9. [DOI: 10.1016/j.rbmo.2010.06.043] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2009] [Revised: 06/26/2010] [Accepted: 06/29/2010] [Indexed: 12/01/2022]
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Abstract
Emission of nitrogen in the form of ammonia from poultry rearing facilities has been an important topic for the poultry industry because of concerns regarding the effects of ammonia on the environment. Sound scientific data is needed to accurately estimate air emissions from poultry operations. Many factors, such as season of the year, ambient temperature and humidity, bird health, and management practices can influence ammonia volatilization from broiler rearing facilities. Precise results are often difficult to attain from commercial facilities, particularly over long periods of time. Therefore, an experiment was conducted to determine nitrogen loss from broilers in a research facility under conditions simulating commercial production for 18 consecutive flocks. Broilers were reared to 40 to 42 d of age and fed diets obtained from a commercial broiler integrator. New rice hulls were used for litter for the first flock, and the same litter was recycled for all subsequent flocks with caked litter removed between flocks. All birds, feeds, and litter materials entering and leaving the facility were quantified, sampled, and analyzed for total nitrogen content. Nitrogen loss was calculated by the mass balance method in which loss was equal to the difference between the nitrogen inputs and the nitrogen outputs. Nitrogen partitioning as a percentage of inputs averaged 15.29, 6.84, 55.52, 1.27, and 21.08% for litter, caked litter, broiler carcasses, mortalities, and nitrogen loss, respectively, over all eighteen flocks. During the production of 18 flocks of broilers on the same recycled litter, the average nitrogen emission rate was calculated to range from 4.13 to 19.74 g of N/ kg of marketed broiler (grams of nitrogen per kilogram) and averaged 11.07 g of N/kg. Nitrogen loss was significantly (P < 0.05) greater for flocks reared in summer vs. winter. Results of this experiment have demonstrated that the rate of nitrogen volatilization from broiler grow-out facilities varies significantly on a flock-to-flock basis.
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Affiliation(s)
- C D Coufal
- Department of Poultry Science, Texas A&M University, College Station 77843-2474, USA
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Abstract
It is important for broiler producers to know litter production rates and litter nutrient content when developing nutrient management plans. Estimation of broiler litter production varies widely in the literature due to factors such as geographical region, type of housing, size of broiler produced, and number of flocks reared on the same litter. Published data for N, P, and K content are also highly variable. In addition, few data are available regarding the rate of production, characteristics, and nutrient content of caked litter (cake). In this study, 18 consecutive flocks of broilers were reared on the same litter in experimental pens under simulated commercial conditions. The mass of litter and cake produced was measured after each flock. Samples of all litter materials were analyzed for pH, moisture, N, P, and K. Average litter and cake moisture content were 26.4 and 46.9%, respectively. Significant variation in litter and cake nutrient content was observed and can largely be attributed to ambient temperature differences. Average litter, cake, and total litter (litter plus cake) production rates were 153.3, 74.8, and 228.2 g of dry litter material per kg of live broiler weight (g/kg) per flock, respectively. Significant variation in litter production rates among flocks was also observed. Cumulative litter, cake, and total litter production rates after 18 flocks were 170.3, 78.7, and 249.0 g/kg, respectively. The data produced from this research can be used by broiler producers to estimate broiler litter and cake production and the nutrient content of these materials.
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Affiliation(s)
- C D Coufal
- Department of Poultry Science, Texas A&M University, College Station 77843, USA
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Coufal CD, Chavez C, Niemeyer PR, Carey JB. Effects of top-dressing recycled broiler litter on litter production, litter characteristics, and nitrogen mass balance. Poult Sci 2006; 85:392-7. [PMID: 16553265 DOI: 10.1093/ps/85.3.392] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Top-dressing is a method of broiler litter management in which a thin layer of new, clean litter material is spread over the top of previously used litter prior to placement of a new flock. This fresh layer of bedding material increases the absorptive capacity of the litter and decreases litter caking. Although this practice has been widely used in the poultry industry for many years, no research has been conducted to quantify the effects the practice has on broiler performance, litter production rates, and nutrient content, or the ability of broiler litter to retain manure N and prevent volatilization. An experiment was conducted to quantify these parameters under simulated commercial conditions in a research facility. Nine consecutive flocks of broilers were reared on recycled broiler litter that had previously been used for 9 flocks. Control pens received no litter treatment whereas top-dressed pens received a thin layer of new rice hulls (1 to 2 cm) before the placement of each flock. Nitrogen loss was calculated using the mass balance method. Average broiler performance was not different between the top-dressed and control pens. Top-dressing of litter significantly (P < 0.05) reduced caked litter production compared with control pens in 6 of 9 flocks. However, average total litter production over all 9 flocks was not different between the 2 litter management strategies. In all flocks, litter N content was significantly reduced in top-dressed pens compared with control pens. As a result, litter C:N ratios were significantly higher for pens with top-dressed litter. Differences in N loss between the treatments were not consistent. Average N loss for all flocks was 10.61 and 11.92 g of N/kg of marketed broiler for control and top-dressed pens, respectively, or 20.1 and 22.5% of N inputs, respectively. Based on this experiment, top-dressing of recycled broiler litter would not be recommended as a strategy to reduce the volatilization of N from broiler rearing facilities and, in fact, may actually increase N loss.
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Affiliation(s)
- C D Coufal
- Department of Poultry Science, Texas A&M University, College Station, TX 77843-2474, USA
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Chavez C, Coufal CD, Niemeyer PL, Carey JB, Lacey RE, Miller RK, Beier RC. Impact of Dietary Supplemental Methionine Sources on Sensory Measurement of Odor-Related Compounds in Broiler Excreta. Poult Sci 2004; 83:1655-62. [PMID: 15510549 DOI: 10.1093/ps/83.10.1655] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
An experiment was conducted to detect differences in odor characteristics of broiler excreta due to utilization of different supplementary Met sources by a trained human descriptive aroma attribute sensory panel. The 5 treatment groups were no supplemental Met (control group), sodium methioninate aqueous solution, dry Met hydroxy analogue, liquid Met hydroxy analogue, and DL-Met. Two trials were conducted consisting of 5 treatment groups with 3 replications of 13 randomly distributed straight run broiler chicks per pen reared in battery cages. Starter and grower diets were formulated to contain 0.5 and 0.38% Met activity, respectively (except control group, 0.35% Met activity). Excreta were collected for 24 h in litter pans lined with aluminum foil at wk 4, 5, and 6 and analyzed by a trained sensory panel (7 people). Each panelist was given 25 g of manure heated at 27 degrees C for 5 min for sensory analysis. The 13 odor attributes used to determine differences in broiler excreta by the trained sensory panel were ammonia, dirty socks, wet poultry, fermented rotten fruit, hay, musty wet, sharp, sour, urinous, rotten eggs, irritating, pungent, and nauseating. Panelist marked intensities for each attribute ranging from 0 = none and 15 = extremely intense. Each panelist was given 2 replications of each treatment group in a random order each week (total of 10 samples per wk). All data were evaluated by ANOVA using the general linear model procedure of SAS software. No significant differences were observed in BW, feed consumption, or feed conversion among the treatments. The attributes of ammonia, wet poultry, rotten fruit, musty wet, sharp, and pungent differed (P < 0.05) across treatment groups. These findings demonstrate that supplemental Met sources significantly influence odor production in broiler excreta.
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Affiliation(s)
- C Chavez
- Department of Poultry Science, Texas A&M University, College Station, Texas 77845-2472, USA
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Abstract
To determine the impact of Met source on volatile compounds of broiler excreta, 2 trials were conducted using straight-run broiler chicks that were randomly distributed in battery cages with 3 replicate pens of 16 birds each. The treatment groups were 1) dry Met hydroxy analogue (52% Met activity), 2) sodium methioninate aqueous solution (45.9% Met activity), 3) liquid Met hydroxy analogue (88% Met activity), 4) DL-Met, (98% Met activity), and 5) no supplemental Met. All starter diets were formulated to contain 3,135 kcal of ME/kg, 23% crude protein, and 0.8% total Met activity and otherwise met NRC nutrient requirements. Diets were fed ad libitum from d 1 to termination of the study (5 to 6 wk). Feed consumption and feed conversion were measured daily, and all birds were weighed weekly. There were no significant differences in BW, feed consumption, or feed conversion among the treatments in either trial. All excreta were collected in litter pans daily lined with aluminum foil. Litter pans for each pen were individually transferred to a separate room for weekly odor volatile analysis. An electronic nose was used to capture 3 to 4 air samples from various locations for each pan of broiler excreta resulting in a total of 10 air samples from each treatment group. All data taken from the electronic nose were evaluated using analysis of variance. Results indicated that there were significant differences in volatiles in the broiler excreta for all treatment groups. These data indicate that different Met sources may result in the production of different odor-related compounds in broiler excreta.
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Affiliation(s)
- C Chavez
- Department of Poultry Science, Texas A&M University, College Station, Texas 77843-2472, USA
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Chavez C, Coufal CD, Carey JB, Lacey RE, Beier RC, Zahn JA. The Impact of Supplemental Dietary Methionine Sources on Volatile Compound Concentrations in Broiler Excreta. Poult Sci 2004; 83:901-10. [PMID: 15206616 DOI: 10.1093/ps/83.6.901] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The impact of different Met sources on broiler fecal odor volatiles was determined by evaluating the types of sulfur compounds produced in broiler excreta. Two experiments were conducted using straight-run broiler chicks randomly distributed in battery cages, with 3 replicate pens of 16 birds each. The treatment groups were 1) dry Met hydroxy analogue (dry MetHA), 2) sodium methioninate aqueous solution (NaMet), 3) liquid Met hydroxy analogue (Liq MetHA), 4) D,L- Met, and 5) no supplemental Met (control group). The Met activities of each Met source were 52, 45.9, 88, and 98%, respectively. All diets were formulated to contain either 0.8% (experiment 1) total Met activity or 0.5% Met activity in the starter and 0.38% Met activity in the grower (experiment 2) (except the control group, 0.35% Met activity), but otherwise met NRC nutrient requirements (NRC, 1994). Diets were fed ad libitum from d 1 to 6 wk of age. There were no significant differences in BW among the treatments. All excreta were collected in litter pans lined with aluminum foil. In experiment 1, at wk 6, broiler excreta were collected for a 24-h period, and 4.5 g of broiler excreta from each treatment group was collected into 15-mL headspace vials. Samples were analyzed by gas chromatography/mass spectrometry (GC/MS). The volatile sulfur compounds that were identified and quantified in the broiler excreta were H2S, carbonyl sulfide (COS), methyl mercaptan (CH3SH), dimethyl disulfide (CH3SSCH3), and dimethyl trisulfide (CH3SSSCH3). The NaMet treatment group had significantly higher concentrations of H2S, COS, and CH3SSCH3 compared with all other treatment groups. The Liq MetHA group had significantly lower concentrations of H2S, COS, CH3SH, and CH3SSCH3 compared with the other treatment groups. The dry MetHA group significantly had the highest concentration of CH4SH. The D,L-Met treatment group had the significantly highest concentration of CH3SSSCH3 and the lowest concentration of H2S. The control group had the significantly lowest concentrations of CH3SH, CH3SSCH3, and CH3SSSCH3 compared with the other treatment groups. In experiment 2, at wk 6, an electronic nose was used to evaluate 15 air samples per treatment group. In addition, 15 air samples (containing 6 to 8 L of air in a Tedlar bag, 3 samples per treatment group) were collected for odor evaluation by a sensory panel. Electronic nose sensor data revealed that volatile compounds in broiler excreta from the control group were significantly different from the other 4 treatment groups. Evaluation of the air samples by a sensory panel determined that there was a statistically significant difference in odor threshold detection between the control group and the other treatment groups. The dilutions to threshold of control group, NaMet, dry MetHA, Liq MetHA, and D,L-Met were 350, 492, 568, 496, and 526 odor units, respectively. These findings demonstrate that dietary Met sources significantly influenced odorous volatile concentrations in broiler excreta.
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Affiliation(s)
- C Chavez
- Department of Poultry Science, Texas A&M University, College Station, Texas 77845-2472, USA
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Abstract
Sanitation of hatching eggs is an important area of research due to the need for an effective, economical, and safe method of egg sanitation. Improved hatching egg sanitation is an important part of an overall pathogen reduction program within integrated poultry operations. This must be accomplished without disturbing the cuticle of the egg, which can decrease hatchability. The ability of ultraviolet (UV) light to kill bacteria on eggshell surfaces has been well documented. To accomplish the task of treating the eggs in a method that could be commercially implemented, a cabinet was constructed in which ultraviolet lamps were placed. A conveyor system was used to carry a plastic hatching egg flat containing 42 eggs through the cabinet for a period of 3 or 4 min. Ultraviolet intensities within the cabinet reached a maximum of 14 mW/cm2. Experiments were conducted to test the impact of UV light (254 nm) exposure of hatching eggs on aerobic plate counts (APC), inoculated Salmonella typhimurium and inoculated Escherchia coli. In the first three experiments, seven eggs were sampled from a flat passed through the UV chamber. Ultraviolet-treated eggs compared to untreated eggs had APC reductions of 1.3 log, S. typhimurium had a 4 log reduction, and E. coli had a 4 to 5 log reduction. Laboratory trials were also conducted to test the effects of UV irradiation on the cuticle of the egg and hatchability. No significant differences for eggshell conductance or hatchability were found between UV-treated and control eggs. From these trials, it can be concluded that UV irradiation of hatching eggs in a prototype irradiation cabinet can effectively reduce aerobic and pathogenic bacteria on eggshell surfaces without affecting eggshell conductance or hatchability.
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Affiliation(s)
- C D Coufal
- Department of Poultry Science, Texas A&M University, College Station, Texas 77843-2472, USA
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Abstract
The effects of 254 nm ultraviolet light (UV) radiation on aerobic plate count (APC) of egg shells were investigated. In the first experiment, eggs were exposed to UV treatment (7.35 mW/cm2) for 0, 15, 30, and 60 s. Three eggs from each treatment were aseptically collected and placed into sterile plastic bags containing 50 mL of sterile phosphate-buffered solution. Serial dilutions of the phosphate-buffered solution were plated on aerobic plate count agar and incubated at 37 C for 48 h. Exposure of eggshells to 30 and 60 s UV significantly reduced aerobic plate counts compared to untreated eggs. Exposure to 60 s of UV resulted in a 2 to 3 log10 cfu/egg APC reduction and reduced counts below detectable levels. In the second experiment, UV lights were placed in a chamber equipped with a commercial-style egg conveyor. A UV treatment of 7.5 mW/cm2 and time intervals of 0, 12, 36, and 48 s were used. Three eggs were placed consecutively on the conveyor and passed through the chamber. The center egg was selected for APC evaluation. Sample size, dilution, plating, and incubation procedures were used as described for the first experiment. A significant 1 to 2 log10 reduction in colony-forming units per egg between the eggs treated 48 s to the untreated eggs was detected. The results of these studies show that UV light treatment at high intensities and low time intervals has the potential to reduce aerobic plate counts of eggshells.
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Affiliation(s)
- C Chavez
- Poultry Science Department, Texas A&M University, College Station 77843-2472, USA
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Knape KD, Chavez C, Burgess RP, Coufal CD, Carey JB. Comparison of eggshell surface microbial populations for in-line and off-line commercial egg processing facilities. Poult Sci 2002; 81:695-8. [PMID: 12033420 DOI: 10.1093/ps/81.5.695] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The objective of this project was to evaluate the aerobic plate counts (APC) of eggshells at in-line and off-line egg processing facilities at selected sites, throughout the processing procedure. Samples were collected from four sites in the processing plant and five time periods during the daily processing shift. Site 1 was from the conveyor system before the eggs passed through the washing system. Site 2 was after detergent wash but before sanitizer application. Site 3 was immediately after sanitizer treatment. Site 4 was immediately before packaging. Samples were collected from the sites at five equally spaced intervals beginning 15 min after the processing shift began and ending 15 min before the processing shift ended. At each sampling time, eggs were aseptically collected from each site and placed into sterile plastic bags containing 50 mL of PBS that was serially diluted immediately. The dilutions were plated on APC agar within 8 h of collection and were incubated at 37 C for 48 h. APC counts of in-line and off-line eggs were compared within time periods across sites. As the processing shift progressed, off-line APC counts were significantly higher than in-line counts at Site 1. At Site 2, off-line APC counts were significantly higher than in-line counts for Periods 2 through 5. At Site 3, off-line APC counts were significantly higher than in-line counts for Periods 2 through 5. Site 4 off-line counts were significantly higher than in-line counts at all time periods.
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Affiliation(s)
- K D Knape
- Department of Poultry Science, Texas A&M University, College Station 77843-2472, USA
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Berger TJ, Chavez C, Tew RD, Navasca FT, Ostrow DH. Biological indicator comparative analysis in various product formulations and closure sites. PDA J Pharm Sci Technol 2000; 54:101-9. [PMID: 10822980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- T J Berger
- Abbott Laboratories, Department of Biologics Development R&D, Abbott Park, Illinois, USA
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Lynn MM, Achtmeyer C, Chavez C, Zicafoose B, Therien J. The evolving role of advanced practice nursing within the new Veteran's Health Administration. Health Care Manage Rev 1999; 24:80-93. [PMID: 10572792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
The Veteran's Health Administration (VHA) is experiencing profound change in focus and organization of service delivery. The focus of the evolving VHA system includes improvements in performance outcomes, such as actual costs, better access, higher levels of customer satisfaction, and improved functional status of patients. Given the changing nature of service delivery in the VHA system and the contributions of the Advanced Practices Nurses (APNs), this article explores the expanding role of the APN within the VHA and presents a best practice model for achieving the full potential of advanced nursing practice.
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Goldkorn T, Balaban N, Matsukuma K, Chea V, Gould R, Last J, Chan C, Chavez C. EGF-Receptor phosphorylation and signaling are targeted by H2O2 redox stress. Am J Respir Cell Mol Biol 1998; 19:786-98. [PMID: 9806743 DOI: 10.1165/ajrcmb.19.5.3249] [Citation(s) in RCA: 154] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Inflammation of the respiratory tract is associated with the production of reactive oxygen species, such as hydrogen peroxide (H2O2) and superoxide (O2-), which contribute extensively to lung injury in diseases of the respiratory tract. The mechanisms and target molecules of these oxidants are mainly unknown but may involve modifications of growth-factor receptors. We have shown that H2O2 induces epidermal growth factor (EGF)-receptor tyrosine phosphorylation in intact cells as well as in membranes of A549 lung epithelial cells. On the whole, total phosphorylation of the EGF receptor induced by H2O2 was lower than that induced by the ligand EGF. Phosphorylation was confined to tyrosine residues and was inhibited by addition of genistein, indicating that it was due to the activation of protein tyrosine kinase (PTK). Phosphoamino acid analysis revealed that although the ligand, EGF, enhanced the phosphorylation of serine, threonine, and tyrosine residues, H2O2 preferentially enhanced tyrosine phosphorylation of the EGF receptor. Serine and threonine phosphorylation did not occur, and the turnover rate of the EGF receptor was slower after H2O2 exposure. Selective H2O2-mediated phosphorylation of tyrosine residues on the EGF receptor was sufficient to activate phosphorylation of an SH2-group-bearing substrate, phospholipase C-gamma (PLC-gamma), but did not increase mitogen-activated protein (MAP) kinase activity. Moreover, H2O2 exposure decreased protein kinase C (PKC)-alpha activity by causing translocation of PKC-alpha from the membrane to the cytoplasm. These studies provide novel insights into the capacity of a reactive oxidant, such as H2O2, to modulate EGF-receptor function and its downstream signaling. The H2O2-induced increase in tyrosine phosphorylation of the EGF receptor, and the receptor's slower rate of turnover and altered downstream phosphorylation signals may represent a mechanism by which EGF-receptor signaling can be modulated during inflammatory processes, thereby affecting cell proliferation and thus having implications in wound repair or tumor formation.
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Affiliation(s)
- T Goldkorn
- Department of Medicine, University of California, Davis School of Medicine, Davis, California, USA
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Ceballos G, Fleming TH, Chavez C, Nassar J. Population Dynamics of Leptonycteris curasoae (Chiroptera: Phyllostomidae) in Jalisco, Mexico. J Mammal 1997. [DOI: 10.2307/1383065] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Zagrobelny J, Chavez C, Constanzer ML, Matuszewski BK. Determination of a substance P antagonist in human plasma and urine using high-performance liquid chromatography with ultraviolet absorbance and tandem mass spectrometric detection. J Pharm Biomed Anal 1997; 15:1427-33. [PMID: 9226572 DOI: 10.1016/s0731-7085(96)02038-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A high-performance liquid chromatographic (HPLC) assay using ultraviolet (UV) detection was developed and compared with a HPLC method with tandem mass spectrometric (HPLC/MS-MS) detection for the determination of a substance P receptor antagonist 2(S)-((3,5-bis(trifluoromethyl)benzyl)-oxy)-3(S)-phenyl-4-((3-oxo-1,2,4- triazol-5-yl) methyl)morpholine (Fig. 1, Ia, L-742 694) in human plasma and urine. The drug was isolated from the biological matrix through liquid-liquid extraction. In the HPLC/UV method, the samples were initially injected onto a cyano Hypersil column, and the chromatographic region containing the peaks of interest was heart-cut onto an analytical C-18 Hypersil column via a column switching device. The analyte was quantified by monitoring absorbance at 205 nm. The limit of quantification for I extracted from 1 ml of plasma or urine was 2.5 ng ml-1, and the assays were validated in the concentration range 2.5-500 ng ml-1. The HPLC/MS-MS method were validated in the concentration range 0.2-500 ng ml-1. Both assays provided data with precision, measured as coefficient of variation, better than 10% at all points within the standard curve range and with adequate accuracy.
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Affiliation(s)
- J Zagrobelny
- Department of Drug Metabolism, Merck Research Laboratories, West Point, PA 19486, USA
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Chavez C. Passive hyperimmune therapy: buying time at what cost? Caring 1996; 15:48-50. [PMID: 10159954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Some AIDS physicians are now turning to passive hyperimmune therapy as an alternative to try to protect and rebuild AIDS patients' ravaged immune systems. This is a labor-intensive and expensive treatment that raises many questions.
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Abstract
OBJECTIVE To assess the utility of geriatric targeting criteria in predicting survival and health care utilization in a cohort of hospitalized older veterans. DESIGN A prospective cohort study assessing geriatric targeting criteria, e.g., polypharmacy, falls, or confusion, with respect to adverse outcomes at 12 months. SETTING A Tertiary Care VA Medical Center. PATIENTS 507 acutely hospitalized male veterans aged 65 years or more. MAIN OUTCOME MEASURES Survival status, nursing home placement, and total hospital days during 12 months following hospital admission. RESULTS Patients who had a higher number of targeting criteria at admission showed a significantly increasing trend toward death (P < or = .001), nursing home placement (P < or = .01), and longer hospital stays (P < or = .01) at 12 months. In univariate analyses, weight loss (relative hazard 3.8, 95% CI 2.4, 5.9), appetite loss (relative hazard 3.3, 95% CI 1.9, 5.8), depression (relative hazard 2.5, 95% CI 1.4, 4.5), falls (relative hazard 2.2, 95% CI 1.2, 4.1), confusion (relative hazard 2.2, 95% CI 1.2, 4.0), and socioeconomic problems (relative hazard 1.6, 95% CI 1.0, 2.5) predicted death. Polypharmacy (OR 3.4, 95% CI 1.3, 8.8), confusion (OR 4.4, 95% CI 1.5, 13.0), and prolonged bedrest (OR 7.6, 95% CI 1.5, 39.3) predicted nursing home placement. Confusion (Beta 12.0, 95% CI 2.9, 21.3), falls (Beta 14.2, 95% CI 4.2, 24.3), and prolonged bedrest (Beta 22.4, 95% CI 3.9, 41.0) predicted total hospital days. In multivariate analyses, weight loss, depression, and socioeconomic problems predicted death; confusion and polypharmacy predicted nursing home placements; and falls predicted total hospital days. CONCLUSION This prospective cohort study of hospitalized older veterans demonstrated geriatric targeting criteria as predictors of adverse hospital outcomes. Our findings suggest screening acutely hospitalized patients using chart abstracted geriatric targeting criteria is useful in identifying patients at risk for adverse outcomes of hospitalization.
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Affiliation(s)
- S Satish
- Department of Internal Medicine, University of Texas Medical Branch, Galveston 77555-0460, USA
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Chavez C, Chavez L. The right home care agency for you. Posit Aware 1996; 7:22-3. [PMID: 11363610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
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Chavez C, Chazez L. Different needs for different care. Posit Aware 1996; 7:23. [PMID: 11363611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
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Zagrobelny J, Chavez C, Constanzer M, Matuszewski BK. Determination of a glycine/NMDA receptor antagonist in human plasma and urine using column-switching high-performance liquid chromatography with ultraviolet, fluorescence and tandem mass spectrometric detection. J Pharm Biomed Anal 1995; 13:1215-23. [PMID: 8562593 DOI: 10.1016/0731-7085(95)01535-s] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
High-performance liquid chromatography (HPLC) assays using ultraviolet (UV) and fluorescence (FL) detection were developed and compared with a liquid chromatography/tandem mass spectrometry (LC/MS-MS) method for determination of the glycine receptor antagonist 7-chloro-4-hydroxy-3-(3-phenoxy)phenyl-2(1H)-quinolone (L-701, 324, I) in human plasma and urine. The drug and internal standard (II) were isolated from the biological matrix through liquid-liquid extraction. In the HPLC-UV and HPLC-FL methods, the samples were initially injected onto a Cyano BDS Hypersil column, and the chromatographic region containing the peaks of interest was heart-cut onto an analytical C-18 BDS Hypersil column via a column-switching device. The analyte was quantified by monitoring either absorbance at 226 nm or fluorescence at 385 nm following 230 nm excitation. The limit of quantitation for I extracted from 1 ml of plasma or urine was 5 ng ml-1, and the assays were validated in the concentrated range of 5-200 ng ml-1. The LC/MS-MS method also utilized a column-switching protocol and was validated in the concentration range of 1-200 ng ml-1. Both assays provided data with precision and accuracy within less than 10% for all points in the standard curve range.
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Affiliation(s)
- J Zagrobelny
- Merck Research Laboratories, Department of Drug Metabolism, West Point, PA 19486, USA
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Chavez C. 15 things you need to know about healthy eating. Posit Aware 1995:14-6. [PMID: 11362372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
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38
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Constanzer M, Chavez C, Matuszewski B. Development and comparison of high-performance liquid chromatographic methods with tandem mass spectrometric and ultraviolet absorbance detection for the determination of cyclobenzaprine in human plasma and urine. J Chromatogr B Biomed Appl 1995; 666:117-26. [PMID: 7655609 DOI: 10.1016/0378-4347(94)00556-k] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Sensitive assays for the determination of cyclobenzaprine (I) in human plasma and urine were developed utilizing high-performance liquid chromatography (HPLC) with tandem mass spectrometric (MS-MS) and ultraviolet (UV) absorbance detections. These two analytical techniques were evaluated for reliability and sensitivity, and applied to support pharmacokinetic studies. Both methods employed a liquid-liquid extraction of the compound from basified biological sample. The organic extract was evaporated to dryness, the residue was reconstituted in the mobile phase and injected onto the HPLC system. The HPLC assay with MS-MS detection was performed on a PE Sciex API III tandem mass spectrometer using the heated nebulizer interface. Multiple reaction monitoring using the parent-->daughter ion combinations of m/z 276 --> 215 and 296 --> 208 was used to quantitate I an internal standard (II), respectively. The HPLC-MS-MS and HPLC-UV assays were validated in human plasma in the concentration range 0.1-50 ng/ml and 0.5-50 ng/ml, respectively. In urine, both methods were validated in the concentration range 10-1000 ng/ml. The precision of the assays, as expressed as coefficients of variation (C.V.) was less than 10% over the entire concentration range, with adequate assay specificity and accuracy. In addition to better sensitivity, the HPLC-MS-MS assay was more efficient and allowed analysis of more biological fluid samples in a single working day than the HPLC-UV method.
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Affiliation(s)
- M Constanzer
- Merck Research Laboratories, West Point, PA 19486, USA
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Chavez C. Prickly business. The finer points of acupuncture. Posit Aware 1995:14-5. [PMID: 11362204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
Acupuncture, which is gaining credibility among the Western medical establishment, is just one element of traditional Chinese medicine (TCM) being used to treat fatigue, nausea, insomnia, diarrhea, menstrual problems, and HIV-related peripheral neuropathy. Acupuncture is often used in combination with exercise massage, meditation, and herbal therapy. Special combinations of Chinese herbs are used to treat HIV-conditions, promote digestion, increase energy, and fight fungal infections. "Enhance", "Resist", and "Combination A", are three such formulas. Another benefit of acupuncture and Chinese herbs is their ability to decrease side effects associated with Western medicine. The growing medical interest in acupuncture is evidenced in the progress of CPCRA 022, a phase II/III trial to study acupuncture alone or in combination with amitriptyline, an anti-depressant, as a treatment for peripheral neuropathy. The National Institutes of Health (NIH) recently awarded the Bastyr University in Seattle, with funds to study alternative therapies. Regardless of outcomes, these studies may encourage other organizations to pursue acupuncture trials.
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Abstract
A gene encoding a Streptococcus mutans surface protein antigen has been isolated from a strain GS-5 gene bank constructed via the Streptococcus-Escherichia coli shuttle vector pSA3. This E. coli recombinant clone, designated 4B2, expressed S. mutans proteins, as shown by Western immunoblot analysis with a specific rabbit antibody to S. mutans surface antigens. Three bands were observed, including a 52-kilodalton (kDa) protein (pI 5.7), a 29-kDa protein (pI 4.2), and a 20-kDa protein usually present in lower amounts. The 52- and 29-kDa proteins both reacted with a monoclonal antibody to S. mutans antigen A, a 29-kDa protein which has been characterized and used as a vaccine for the prevention of induced caries in rodents and monkeys. The 52-kDa protein, but not the 29-kDa protein, showed a capacity to bind to a broad number of carbohydrate polymers. The results from this study suggest that the recombinant 4B2 clone specifies a 52-kDa protein which is a precursor to the 29-kDa antigen A.
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Affiliation(s)
- M L Dao
- Department of Pediatrics/St. Petersburg, University of South Florida, All Children's Hospital, St. Petersburg 33701
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Abstract
Recent studies demonstrating decreases in transport kinetics of zinc (Zn) in testis in response to calcitonin (CT) and the presence of CT receptors on Leydig cells has suggested a physiological interrelationship between CT and cellular Zn metabolism in the testis. The present studies were undertaken to evaluate the acute effects of human synthetic calcitonin (hCT) on testosterone (T) synthesis and on transmembrane Zn transport as measured in a closed two-compartment model system in Leydig cells isolated from intact and thyroparathyroldectomized (TPTX) rats. Leydig cells acutely exposed to 1 ng/mL equine luteinizing hormone (LH) in vitro had a fivefold increase in medium T concentration. Calcitonin at 42 micrograms/mL had no effect on the basal T synthesis and did not affect the increase seen after LH administration. Lower doses of LH demonstrated a dose response for T production, but no alteration in the pattern of response. In TPTX rats pretreated with 167 micrograms/d (25 MRC U/d) hCT subcutaneously (sc) for three days before they were killed, a reduction to 73% of the control value was observed in the in vitro Leydig cell fractional influx coefficient for Zn transport (P less than .02). No difference was observed in the fractional efflux coefficient. Fractional flux coefficients from intact rats demonstrated qualitatively similar, but more variable, changes. These data demonstrate that there is no acute effect of CT on T synthesis in the isolated Leydig cell. There does appear, nevertheless, to be a role for CT in the modulation of transmembrane Zn transport. Clinically important Zn-dependent alterations of T synthesis may require long-term changes in Zn metabolism before they become manifest.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- A B Chausmer
- Endocrinology and Metabolism Section, Medical Service, VA Medical Center, Bay Pines, FL 33504
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Anderson TR, Reichenstein FW, Durbin RK, Chavez C. 347. Med Sci Sports Exerc 1987. [DOI: 10.1249/00005768-198704001-00347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Slocum R, Thompson F, Chavez C. [Letter: Rarity of asthma among Cheyenne Indians]. Ann Allergy 1975; 34:201-2. [PMID: 1124858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Sasaki C, Nowaczynski W, Kuchel O, Chavez C, Ledoux F, Gauthier S, Genest J. Plasma progesterone in normal subjects and patients with benign essential hypertension on normal, low, and high sodium intake. J Clin Endocrinol Metab 1972; 34:650-60. [PMID: 5012771 DOI: 10.1210/jcem-34-4-650] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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