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Robinson JF, DAS S, Khan W, Khanam R, Price JT, Rahman A, Ahmed S, Mohammed Ali S, Deb S, Deveale B, Dutta A, Gormley M, Hall SC, Hasan ASMT, Hotwani A, Juma MH, Kasaro MP, Khalid J, Kshetrapal P, McMaster MT, Mehmood U, Nisar I, Pervin J, Rahman S, Raqib R, San A, Sarker P, Tuomivaara ST, Zhang G, Zhou Y, Aktar S, Baqui AH, Jehan F, Sazawal S, Stringer JSA, Fisher SJ. High Rates of Placental Inflammation Among Samples Collected by the MOMI Consortium. Am J Obstet Gynecol 2024:S0002-9378(24)00560-X. [PMID: 38697337 DOI: 10.1016/j.ajog.2024.04.034] [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: 11/02/2023] [Revised: 04/18/2024] [Accepted: 04/24/2024] [Indexed: 05/04/2024]
Abstract
BACKGROUND The Multi-Omics for Mothers and Infants (MOMI) consortium aims to improve birth outcomes. Preterm birth is a major obstetric complication globally causing significant infant and childhood morbidity and mortality. OBJECTIVES We analyzed placental samples (basal plate, placenta/chorionic villi and/or the chorionic plate) collected by the 5 MOMI sites: The Alliance for Maternal and Newborn Health Improvement (AMANHI) Bangladesh, AMANHI Pakistan, AMANHI Tanzania, The Global Alliance to Prevent Prematurity and Stillbirth (GAPPS) Bangladesh and GAPPS Zambia. The goal was to analyze the morphology and gene expression of samples collected from preterm and uncomplicated term births. STUDY DESIGN The teams provided biopsies from 166 singleton preterm (<37 weeks) and 175 term (≥37 weeks) deliveries. They were formalin-fixed and paraffin embedded. Tissue sections from these samples were stained with hematoxylin and eosin and subjected to morphological analyses. Other placental biopsies (n = 35 preterm, 21 term) were flash frozen, which enabled RNA purification for bulk transcriptomics. RESULTS The morphological analyses revealed a surprisingly high rate of inflammation involving the basal plate, placenta/chorionic villi and/or the chorionic plate. The rate in chorionic villus samples, likely attributable to chronic villitis, ranged from 25% (Pakistan site) to 60% (Zambia site) of cases. Leukocyte infiltration in this location vs. the basal plate or chorionic plate correlated with preterm birth. Our transcriptomic analyses identified 267 genes as differentially expressed (DE) between placentas from preterm vs. term births (123 upregulated, 144 downregulated). Mapping the DE genes onto single cell RNA-seq data from human placentas suggested that all the component cell types, either singly or in subsets, contributed to the observed dysregulation. Consistent with the histopathological findings, GO (Gene Ontology) analyses highlighted leukocyte infiltration/activation and inflammatory responses in both the fetal and maternal compartments. CONCLUSION The relationship between placental inflammation and preterm birth is appreciated in developed countries. Here, we show that this link also exists in developing geographies. Also, among the participating sites, we found geographic- and/or population-based differences in placental inflammation and preterm birth, suggesting the importance of local factors.
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Affiliation(s)
- Joshua F Robinson
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Center for Reproductive Sciences, University of California, San Francisco, CA 94143, USA
| | - Sayan DAS
- Public Health Laboratory-IdC, Wawi, Chake, Pemba, Zanzibar, Tanzania
| | - Waqasuddin Khan
- Biorepository and Omics Research Group, Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan; Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan
| | - Rasheda Khanam
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, 615 N. Wolfe Street, Baltimore, MD 21205, USA
| | - Joan T Price
- UNC Global Projects - Zambia; Lusaka, Zambia; Department of Obstetrics and Gynecology, University of North Carolina School of Medicine; Chapel Hill, NC, USA
| | - Anisur Rahman
- Maternal and Child Health Division, International Centre for Diarrhoeal Disease Research Bangladesh, Dhaka, Bangladesh
| | | | - Said Mohammed Ali
- Public Health Laboratory-IdC, Wawi, Chake, Pemba, Zanzibar, Tanzania
| | - Saikat Deb
- Public Health Laboratory-IdC, Wawi, Chake, Pemba, Zanzibar, Tanzania; Center for Public Health Kinetics, 214A, Vinoba Puri, Lajpatnagar-2, New Delhi, India
| | - Brian Deveale
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Center for Reproductive Sciences, University of California, San Francisco, CA 94143, USA; Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, CA 94143, USA; Department of Urology, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Arup Dutta
- Center for Public Health Kinetics, 214A, Vinoba Puri, Lajpatnagar-2, New Delhi, India
| | - Matthew Gormley
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Center for Reproductive Sciences, University of California, San Francisco, CA 94143, USA; Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, CA 94143, USA; Sandler-Moore Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, USA
| | - Steven C Hall
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Center for Reproductive Sciences, University of California, San Francisco, CA 94143, USA; Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, CA 94143, USA; Sandler-Moore Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, USA
| | - A S M Tarik Hasan
- Maternal and Child Health Division, International Centre for Diarrhoeal Disease Research Bangladesh, Dhaka, Bangladesh
| | - Aneeta Hotwani
- Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan
| | | | - Margaret P Kasaro
- UNC Global Projects - Zambia; Lusaka, Zambia; Department of Obstetrics and Gynecology, University of North Carolina School of Medicine; Chapel Hill, NC, USA; Department of Gynaecology and Obstetrics, University of Zambia School of Medicine; Lusaka, Zambia
| | - Javairia Khalid
- Biorepository and Omics Research Group, Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan; Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan
| | - Pallavi Kshetrapal
- Maternal and Child Health, Translational Health Science and Technology Institute, Faridabad, India
| | - Michael T McMaster
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Center for Reproductive Sciences, University of California, San Francisco, CA 94143, USA; Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, CA 94143, USA; Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, California 94143, USA
| | - Usma Mehmood
- Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan
| | - Imran Nisar
- Biorepository and Omics Research Group, Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan; Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan
| | - Jesmin Pervin
- Maternal and Child Health Division, International Centre for Diarrhoeal Disease Research Bangladesh, Dhaka, Bangladesh
| | | | - Rubhana Raqib
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b) Dhaka, Bangladesh
| | - Ali San
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Center for Reproductive Sciences, University of California, San Francisco, CA 94143, USA; Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, CA 94143, USA
| | - Protim Sarker
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research Bangladesh, Dhaka, Bangladesh
| | - Sami T Tuomivaara
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Center for Reproductive Sciences, University of California, San Francisco, CA 94143, USA; Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, CA 94143, USA; Sandler-Moore Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, USA
| | - Ge Zhang
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA; Center for Prevention of Preterm Birth, Perinatal Institute, Cincinnati Children's Hospital Medical Center and March of Dimes Prematurity Research Center Ohio Collaborative, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Yan Zhou
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Center for Reproductive Sciences, University of California, San Francisco, CA 94143, USA; Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, CA 94143, USA
| | - Shaki Aktar
- Maternal and Child Health Division, International Centre for Diarrhoeal Disease Research Bangladesh, Dhaka, Bangladesh
| | - Abdullah H Baqui
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, 615 N. Wolfe Street, Baltimore, MD 21205, USA
| | - Fyezah Jehan
- Biorepository and Omics Research Group, Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan; Department of Pediatrics and Child Health, Faculty of Health Sciences, Medical College, The Aga Khan University, Stadium Road, Karachi-74800, Pakistan
| | - Sunil Sazawal
- Center for Public Health Kinetics, 214A, Vinoba Puri, Lajpatnagar-2, New Delhi, India
| | - Jeffrey S A Stringer
- Department of Obstetrics and Gynecology, University of North Carolina School of Medicine; Chapel Hill, NC, USA
| | - Susan J Fisher
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Center for Reproductive Sciences, University of California, San Francisco, CA 94143, USA; Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, CA 94143, USA; Sandler-Moore Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, USA.
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Tuomivaara ST, Goin DE, Fisher SJ, Hall SC, Mattis AN, Den Besten PK. Fluoride-related changes in the fetal cord blood proteome; a pilot study. Res Sq 2024:rs.3.rs-3995767. [PMID: 38464284 PMCID: PMC10925477 DOI: 10.21203/rs.3.rs-3995767/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Background Fluoride exposure during pregnancy has been associated with various effects on offspring, including changes in behavior and IQ. To provide clues to possible mechanisms by which fluoride affects human fetal development, we completed proteomic analyses of cord blood serum collected from second-trimester pregnant women residing in Northern California with either high or low fluoride exposure, as identified by maternal serum fluoride concentrations. Objective To identify changes in cord blood proteins associated with maternal serum fluoride concentration in pregnant women living in Northern California. Methods The proteomes of 19 archived second-trimester cord blood samples representing highest and lowest serum fluoride concentrations from a cohort of 48 women living in Northern California, previously analyzed for serum, urine and amniotic fluoride concentrations, were characterized by mass spectrometry. Proteins highly correlated to maternal serum fluoride concentrations were identified, and further compared in a group of samples from women with the highest serum fluoride to the group with the lowest maternal serum fluoride concentrations. Results Nine cord blood proteins were significantly correlated with maternal serum fluoride concentrations. Six of these proteins, including apolipoprotein B-100, delta homolog 1, coagulation factor X, mimecan, plasma kallikrein, and vasorin, were significantly decreased in the cord blood from women with the highest serum fluoride levels. Conclusion Changes in the relative amounts of second trimester cord blood proteins included proteins associated with the development of the fetal hematopoetic system.
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Affiliation(s)
| | - Dana E Goin
- University of California, San Francisco San Francisco
| | | | - Steven C Hall
- University of California, San Francisco San Francisco
| | - Aras N Mattis
- University of California, San Francisco San Francisco
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Hossain M, Hall SC, Wiggington PJ, Roth SM, Das S, Das U, Roayapalley PK, Dimmock JR. Cytotoxic benzylidene hydrazides of terephthalic acid and related compounds. Pharmazie 2022; 77:90-94. [PMID: 35459435 DOI: 10.1691/ph.2022.11072] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The present investigation involved the synthesis of a number of novel benzylidene hydrazides as candidate cytotoxic agents. The preparation of these compounds from terephthalic acid and isophthalic acid proceeded satisfactorily. However, the reaction of phthalic acid hydrazide with various aryl aldehydes was unsuccessful in general. Some of the unexpected products were identified. The shapes and also the distances between the centers of the aryl rings designated B and C of three representative compounds 1b, 2b and 3b were determined. The compounds designated 1a-e, 2a-e and 3b were screened against human HCT116 and HT29 colon cancer cells as well as human CRL1790 non-malignant colon cells which revealed the tumor-selective toxicity displayed by these compounds.
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Affiliation(s)
- M Hossain
- School of Sciences, Indiana University Kokomo, Kokomo, USA;,
| | - S C Hall
- School of Sciences, Indiana University Kokomo, Kokomo, USA
| | - P J Wiggington
- School of Sciences, Indiana University Kokomo, Kokomo, USA
| | - S M Roth
- School of Sciences, Indiana University Kokomo, Kokomo, USA
| | - S Das
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Canada
| | - U Das
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Canada
| | - P K Roayapalley
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Canada
| | - J R Dimmock
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Canada
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Alpert E, Akhavan A, Gruzman A, Hansen WJ, Lehrer-Graiwer J, Hall SC, Johansen E, McAllister S, Gulati M, Lin MF, Lingappa VR. Multifunctionality of Prostatic Acid Phosphatase in Prostate Cancer Pathogenesis. Biosci Rep 2021:BSR20211646. [PMID: 34605872 DOI: 10.1042/bcj20200944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 07/14/2021] [Revised: 09/18/2021] [Accepted: 10/04/2021] [Indexed: 11/17/2022] Open
Abstract
The role of human prostatic acid phosphatase (PAcP, P15309|PPAP_HUMAN) in prostate cancer was investigated using a new proteomic tool termed signal sequence swapping (replacement of domains from the native cleaved amino terminal signal sequence of secretory/membrane proteins with corresponding regions of functionally distinct signal sequence subtypes). This manipulation preferentially redirects proteins to different pathways of biogenesis at the endoplasmic reticulum, magnifying normally difficult to detect subsets of the protein of interest. For PAcP this technique reveals three forms identical in amino acid sequence but profoundly different in physiological functions, subcellular location, and biochemical properties. These three forms of PAcP can also occur with the wild-type PAcP signal sequence. Clinical specimens from patients with prostate cancer demonstrate that one form, termed PLPAcP, correlates with early prostate cancer. These findings confirm the analytical power of this method, implicate PLPAcP in prostate cancer pathogenesis, and suggest novel anticancer therapeutic strategies.
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Affiliation(s)
- Evgenia Alpert
- Bioconformatics laboratory of the California Pacific Medical Center (CPMC) Research Institute, Ramat-Gan, California, United States
| | - Armin Akhavan
- Bioconformatics Laboratory of the California Pacific Medical Center (CPMC) Research Institute, San Francisco, California, United States
| | - Arie Gruzman
- Bioconformatics Laboratory of the California Pacific Medical Center (CPMC) Research Institute, San Francisco, California, United States
| | | | - Joshua Lehrer-Graiwer
- Bioconformatics Laboratory of the California Pacific Medical Center (CPMC) Research Institute, San Francisco, California, United States
| | | | | | - Sean McAllister
- Cancer Laboratory of the California Pacific Medical Center (CPMC) Research Institute, San Francisco, California, United States
| | | | - Ming-Fong Lin
- University of Nebraska Medical Center, Omaha, Nebraska, United States
| | - Vishwanath R Lingappa
- Bioconformatics Laboratory of the California Pacific Medical Center (CPMC) Research Institute, San Francisco, California, United States
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5
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Zhou Y, Zou H, Yau C, Zhao L, Hall SC, Drummond DC, Farr-Jones S, Park JW, Benz CC, Marks JD. Discovery of internalizing antibodies to basal breast cancer cells. Protein Eng Des Sel 2018; 31:17-28. [PMID: 29301020 PMCID: PMC6283401 DOI: 10.1093/protein/gzx063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 12/01/2017] [Indexed: 11/14/2022] Open
Abstract
We present a strategy to discover recombinant monoclonal antibodies (mAbs) to specific cancers and demonstrate this approach using basal subtype breast cancers. A phage antibody library was depleted of antibodies to common cell surface molecules by incubation with luminal breast cancer cell lines, and then selected on a single basal-like breast cancer cell line (MDA-MB-231) for binding associated receptor-mediated endocytosis. Additional profiling against two luminal and four basal-like cell lines revealed 61 unique basal-specific mAbs from a pool of 1440 phage antibodies. The unique mAbs were further screened on nine basal and seven luminal cell lines to identify those with the greatest affinity, specificity, and internalizing capability for basal-like breast cancer cells. Among the internalizing basal-specific mAbs were those recognizing four transmembrane receptors (EphA2, CD44, CD73 and EGFR), identified by immunoprecipitation-mass spectrometry and yeast-displayed antigen screening. Basal-like breast cancer expression of these four receptors was confirmed using a bioinformatic approach, and expression microarray data on 683 intrinsically subtyped primary breast tumors. This overall approach, which sequentially employs phage display antibody library selection, antigen identification and bioinformatic confirmation of antigen expression by cancer subtypes, offers efficient production of high-affinity mAbs with diagnostic and therapeutic utility against specific cancer subtypes.
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Affiliation(s)
- Yu Zhou
- Department of Anesthesia and Perioperative Care, University of California, San Francisco Rm 3C-38, Zuckerberg San Francisco General Hospital and Trauma Center, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Hao Zou
- Department of Anesthesia and Perioperative Care, University of California, San Francisco Rm 3C-38, Zuckerberg San Francisco General Hospital and Trauma Center, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Christina Yau
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Lequn Zhao
- Department of Anesthesia and Perioperative Care, University of California, San Francisco Rm 3C-38, Zuckerberg San Francisco General Hospital and Trauma Center, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Steven C Hall
- Department of Obstetrics, Gynecology & Reproductive Sciences, Sandler-Moore Mass Spectrometry Core Facility, 521 Parnassus Avenue, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Daryl C Drummond
- Merrimack Pharmaceuticals Inc., One Kendall Square, Suite B7201, Cambridge, MA 02139, USA
| | - Shauna Farr-Jones
- Department of Anesthesia and Perioperative Care, University of California, San Francisco Rm 3C-38, Zuckerberg San Francisco General Hospital and Trauma Center, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - John W Park
- Department of Medicine, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, Box 1710, San Francisco, CA 94143, USA
| | - Christopher C Benz
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - James D Marks
- Department of Anesthesia and Perioperative Care, University of California, San Francisco Rm 3C-38, Zuckerberg San Francisco General Hospital and Trauma Center, 1001 Potrero Ave, San Francisco, CA 94110, USA
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Hall SC, Hassis ME, Williams KE, Albertolle ME, Prakobphol A, Dykstra AB, Laurance M, Ona K, Niles RK, Prasad N, Gormley M, Shiboski C, Criswell LA, Witkowska HE, Fisher SJ. Alterations in the Salivary Proteome and N-Glycome of Sjögren’s Syndrome Patients. J Proteome Res 2017; 16:1693-1705. [DOI: 10.1021/acs.jproteome.6b01051] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Steven C. Hall
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Sandler-Moore
Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, United States
| | - Maria E. Hassis
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Sandler-Moore
Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, United States
| | - Katherine E. Williams
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Sandler-Moore
Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, United States
| | - Matthew E. Albertolle
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Sandler-Moore
Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, United States
| | - Akraporn Prakobphol
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
| | - Andrew B. Dykstra
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Sandler-Moore
Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, United States
| | - Megan Laurance
- Library
and Center for Knowledge Management, University of California, San Francisco, San Francisco, California 94143, United States
| | - Katherine Ona
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
| | - Richard K. Niles
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Sandler-Moore
Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, United States
| | - Namrata Prasad
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Sandler-Moore
Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, United States
| | - Matthew Gormley
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
| | - Caroline Shiboski
- Department
of Orofacial Sciences, University of California, San Francisco, San Francisco, California 94143, United States
| | - Lindsey A. Criswell
- Department
of Orofacial Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Russel/Engleman
Rheumatology Research Center, Department of Medicine, University of California, San Francisco, San Francisco, California 94143, United States
| | - H. Ewa Witkowska
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Sandler-Moore
Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, United States
| | - Susan J. Fisher
- Department
of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143, United States
- Sandler-Moore
Mass Spectrometry Core Facility, University of California, San Francisco, San Francisco, California 94143, United States
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Shatsky M, Dong M, Liu H, Yang LL, Choi M, Singer ME, Geller JT, Fisher SJ, Hall SC, Hazen TC, Brenner SE, Butland G, Jin J, Witkowska HE, Chandonia JM, Biggin MD. Quantitative Tagless Copurification: A Method to Validate and Identify Protein-Protein Interactions. Mol Cell Proteomics 2016; 15:2186-202. [PMID: 27099342 PMCID: PMC5083090 DOI: 10.1074/mcp.m115.057117] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Indexed: 01/18/2023] Open
Abstract
Identifying protein-protein interactions (PPIs) at an acceptable false discovery rate (FDR) is challenging. Previously we identified several hundred PPIs from affinity purification - mass spectrometry (AP-MS) data for the bacteria Escherichia coli and Desulfovibrio vulgaris. These two interactomes have lower FDRs than any of the nine interactomes proposed previously for bacteria and are more enriched in PPIs validated by other data than the nine earlier interactomes. To more thoroughly determine the accuracy of ours or other interactomes and to discover further PPIs de novo, here we present a quantitative tagless method that employs iTRAQ MS to measure the copurification of endogenous proteins through orthogonal chromatography steps. 5273 fractions from a four-step fractionation of a D. vulgaris protein extract were assayed, resulting in the detection of 1242 proteins. Protein partners from our D. vulgaris and E. coli AP-MS interactomes copurify as frequently as pairs belonging to three benchmark data sets of well-characterized PPIs. In contrast, the protein pairs from the nine other bacterial interactomes copurify two- to 20-fold less often. We also identify 200 high confidence D. vulgaris PPIs based on tagless copurification and colocalization in the genome. These PPIs are as strongly validated by other data as our AP-MS interactomes and overlap with our AP-MS interactome for D.vulgaris within 3% of expectation, once FDRs and false negative rates are taken into account. Finally, we reanalyzed data from two quantitative tagless screens of human cell extracts. We estimate that the novel PPIs reported in these studies have an FDR of at least 85% and find that less than 7% of the novel PPIs identified in each screen overlap. Our results establish that a quantitative tagless method can be used to validate and identify PPIs, but that such data must be analyzed carefully to minimize the FDR.
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Affiliation(s)
- Maxim Shatsky
- From the ‡Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Ming Dong
- §Genomics Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Haichuan Liu
- ¶OB/GYN Department, University of California San Francisco-Sandler-Moore Mass Spectrometry Core Facility, University of California, San Francisco, California 94143
| | - Lee Lisheng Yang
- ‖Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Megan Choi
- §Genomics Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Mary E Singer
- **Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Jil T Geller
- **Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Susan J Fisher
- ¶OB/GYN Department, University of California San Francisco-Sandler-Moore Mass Spectrometry Core Facility, University of California, San Francisco, California 94143
| | - Steven C Hall
- ¶OB/GYN Department, University of California San Francisco-Sandler-Moore Mass Spectrometry Core Facility, University of California, San Francisco, California 94143
| | - Terry C Hazen
- ‡‡Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, Tennessee 37996; §§Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - Steven E Brenner
- From the ‡Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720; ¶¶Department of Plant and Microbial Biology, University of California, Berkeley, California 94720
| | - Gareth Butland
- ‖‖Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Jian Jin
- ‖Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - H Ewa Witkowska
- ¶OB/GYN Department, University of California San Francisco-Sandler-Moore Mass Spectrometry Core Facility, University of California, San Francisco, California 94143
| | - John-Marc Chandonia
- From the ‡Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720;
| | - Mark D Biggin
- §Genomics Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720;
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8
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Shatsky M, Allen S, Gold BL, Liu NL, Juba TR, Reveco SA, Elias DA, Prathapam R, He J, Yang W, Szakal ED, Liu H, Singer ME, Geller JT, Lam BR, Saini A, Trotter VV, Hall SC, Fisher SJ, Brenner SE, Chhabra SR, Hazen TC, Wall JD, Witkowska HE, Biggin MD, Chandonia JM, Butland G. Bacterial Interactomes: Interacting Protein Partners Share Similar Function and Are Validated in Independent Assays More Frequently Than Previously Reported. Mol Cell Proteomics 2016; 15:1539-55. [PMID: 26873250 DOI: 10.1074/mcp.m115.054692] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Indexed: 01/31/2023] Open
Abstract
Numerous affinity purification-mass spectrometry (AP-MS) and yeast two-hybrid screens have each defined thousands of pairwise protein-protein interactions (PPIs), most of which are between functionally unrelated proteins. The accuracy of these networks, however, is under debate. Here, we present an AP-MS survey of the bacterium Desulfovibrio vulgaris together with a critical reanalysis of nine published bacterial yeast two-hybrid and AP-MS screens. We have identified 459 high confidence PPIs from D. vulgaris and 391 from Escherichia coli Compared with the nine published interactomes, our two networks are smaller, are much less highly connected, and have significantly lower false discovery rates. In addition, our interactomes are much more enriched in protein pairs that are encoded in the same operon, have similar functions, and are reproducibly detected in other physical interaction assays than the pairs reported in prior studies. Our work establishes more stringent benchmarks for the properties of protein interactomes and suggests that bona fide PPIs much more frequently involve protein partners that are annotated with similar functions or that can be validated in independent assays than earlier studies suggested.
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Affiliation(s)
- Maxim Shatsky
- From the Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Simon Allen
- the Department of Obstetrics, Gynecology and Reproductive Sciences and Sandler-Moore Mass Spectrometry Core Facility, University of California at San Francisco, San Francisco, California, 94143
| | - Barbara L Gold
- the Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Nancy L Liu
- the Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Thomas R Juba
- the Departments of Biochemistry and of Molecular Microbiology and Immunology, University of Missouri, Columbia, Missouri, 65211
| | - Sonia A Reveco
- From the Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Dwayne A Elias
- the Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831
| | - Ramadevi Prathapam
- the Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Jennifer He
- the Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Wenhong Yang
- the Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Evelin D Szakal
- the Department of Obstetrics, Gynecology and Reproductive Sciences and Sandler-Moore Mass Spectrometry Core Facility, University of California at San Francisco, San Francisco, California, 94143
| | - Haichuan Liu
- the Department of Obstetrics, Gynecology and Reproductive Sciences and Sandler-Moore Mass Spectrometry Core Facility, University of California at San Francisco, San Francisco, California, 94143
| | - Mary E Singer
- the Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Jil T Geller
- the Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Bonita R Lam
- the Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Avneesh Saini
- the Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Valentine V Trotter
- the Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Steven C Hall
- the Department of Obstetrics, Gynecology and Reproductive Sciences and Sandler-Moore Mass Spectrometry Core Facility, University of California at San Francisco, San Francisco, California, 94143
| | - Susan J Fisher
- the Department of Obstetrics, Gynecology and Reproductive Sciences and Sandler-Moore Mass Spectrometry Core Facility, University of California at San Francisco, San Francisco, California, 94143
| | - Steven E Brenner
- From the Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720; the Department of Plant and Microbial Biology, University of California at Berkeley, Berkeley, California, 94720
| | - Swapnil R Chhabra
- From the Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Terry C Hazen
- the Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, Tennessee, 37996; and
| | - Judy D Wall
- the Departments of Biochemistry and of Molecular Microbiology and Immunology, University of Missouri, Columbia, Missouri, 65211
| | - H Ewa Witkowska
- the Department of Obstetrics, Gynecology and Reproductive Sciences and Sandler-Moore Mass Spectrometry Core Facility, University of California at San Francisco, San Francisco, California, 94143
| | - Mark D Biggin
- the Genomics Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - John-Marc Chandonia
- From the Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720;
| | - Gareth Butland
- the Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720; From the Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720;
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9
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Albertolle ME, Hassis ME, Ng CJ, Cuison S, Williams K, Prakobphol A, Dykstra AB, Hall SC, Niles RK, Ewa Witkowska H, Fisher SJ. Mass spectrometry-based analyses showing the effects of secretor and blood group status on salivary N-glycosylation. Clin Proteomics 2015; 12:29. [PMID: 26719750 PMCID: PMC4696288 DOI: 10.1186/s12014-015-9100-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 11/25/2015] [Indexed: 12/15/2022] Open
Abstract
Background The carbohydrate portions of salivary glycoproteins play important roles, including mediating bacterial and leukocyte adhesion. Salivary glycosylation is complex. Many of its glycoproteins present ABO and Lewis blood group determinants. An individual’s genetic complement and secretor status govern the expression of blood group antigens. We queried the extent to which salivary glycosylation varies
according to blood group and secretor status. First, we screened submandibular/sublingual and parotid salivas collected as ductal secretions for reactivity with a panel of 16 lectins. We selected three lectins that reacted with the largest number of glycoproteins and one that recognized uncommon lactosamine-containing structures. Ductal salivas representing a secretor with complex blood group expression and a nonsecretor with a simple pattern were separated by SDS-PAGE. Gel slices were trypsin digested and the glycopeptides were individually separated on each of the four lectins. The bound fractions were de-N-glycosylated. LC–MS/MS identified the original glycosylation sites, the peptide sequences, and the parent proteins. Results The results revealed novel salivary N-glycosites and glycoproteins not previously reported. As compared to the secretor, nonsecretor saliva had higher levels of N-glycosylation albeit with simpler structures. Conclusions Together, the results suggested a molecular basis for inter-individual variations in salivary protein glycosylation with functional implications for oral health. Electronic supplementary material The online version of this article (doi:10.1186/s12014-015-9100-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Matthew E Albertolle
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - Maria E Hassis
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - Connie Jen Ng
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - Severino Cuison
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - Katherine Williams
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - Akraporn Prakobphol
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - Andrew B Dykstra
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - Steven C Hall
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - Richard K Niles
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - H Ewa Witkowska
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
| | - Susan J Fisher
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143 USA.,Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA 94143 USA
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10
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Abbatiello SE, Schilling B, Mani DR, Zimmerman LJ, Hall SC, MacLean B, Albertolle M, Allen S, Burgess M, Cusack MP, Gosh M, Hedrick V, Held JM, Inerowicz HD, Jackson A, Keshishian H, Kinsinger CR, Lyssand J, Makowski L, Mesri M, Rodriguez H, Rudnick P, Sadowski P, Sedransk N, Shaddox K, Skates SJ, Kuhn E, Smith D, Whiteaker JR, Whitwell C, Zhang S, Borchers CH, Fisher SJ, Gibson BW, Liebler DC, MacCoss MJ, Neubert TA, Paulovich AG, Regnier FE, Tempst P, Carr SA. Large-Scale Interlaboratory Study to Develop, Analytically Validate and Apply Highly Multiplexed, Quantitative Peptide Assays to Measure Cancer-Relevant Proteins in Plasma. Mol Cell Proteomics 2015; 14:2357-74. [PMID: 25693799 DOI: 10.1074/mcp.m114.047050] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Indexed: 11/06/2022] Open
Abstract
There is an increasing need in biology and clinical medicine to robustly and reliably measure tens to hundreds of peptides and proteins in clinical and biological samples with high sensitivity, specificity, reproducibility, and repeatability. Previously, we demonstrated that LC-MRM-MS with isotope dilution has suitable performance for quantitative measurements of small numbers of relatively abundant proteins in human plasma and that the resulting assays can be transferred across laboratories while maintaining high reproducibility and quantitative precision. Here, we significantly extend that earlier work, demonstrating that 11 laboratories using 14 LC-MS systems can develop, determine analytical figures of merit, and apply highly multiplexed MRM-MS assays targeting 125 peptides derived from 27 cancer-relevant proteins and seven control proteins to precisely and reproducibly measure the analytes in human plasma. To ensure consistent generation of high quality data, we incorporated a system suitability protocol (SSP) into our experimental design. The SSP enabled real-time monitoring of LC-MRM-MS performance during assay development and implementation, facilitating early detection and correction of chromatographic and instrumental problems. Low to subnanogram/ml sensitivity for proteins in plasma was achieved by one-step immunoaffinity depletion of 14 abundant plasma proteins prior to analysis. Median intra- and interlaboratory reproducibility was <20%, sufficient for most biological studies and candidate protein biomarker verification. Digestion recovery of peptides was assessed and quantitative accuracy improved using heavy-isotope-labeled versions of the proteins as internal standards. Using the highly multiplexed assay, participating laboratories were able to precisely and reproducibly determine the levels of a series of analytes in blinded samples used to simulate an interlaboratory clinical study of patient samples. Our study further establishes that LC-MRM-MS using stable isotope dilution, with appropriate attention to analytical validation and appropriate quality control measures, enables sensitive, specific, reproducible, and quantitative measurements of proteins and peptides in complex biological matrices such as plasma.
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Affiliation(s)
- Susan E Abbatiello
- From the Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142
| | | | - D R Mani
- From the Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142
| | - Lisa J Zimmerman
- Department of Biochemistry, Vanderbilt University School of Medicine, and the Jim Ayers Institute for Precancer Detection and Diagnosis, Vanderbilt-Ingram Cancer Center, Nashville, Tennessee 37232
| | - Steven C Hall
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143
| | - Brendan MacLean
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington 98195
| | - Matthew Albertolle
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143
| | - Simon Allen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143
| | - Michael Burgess
- From the Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142
| | | | - Mousumi Gosh
- Memorial Sloan-Kettering Cancer Center, New York, New York 10065
| | | | - Jason M Held
- Buck Institute for Research on Aging, Novato, California 94945
| | | | - Angela Jackson
- University of Victoria-Genome BC Proteomics Centre, Victoria, British Columbia V8Z 7X8 CAN
| | - Hasmik Keshishian
- From the Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142
| | | | - John Lyssand
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, New York 10016
| | - Lee Makowski
- Argonne National Laboratory (currently at Northeastern University, Boston Massachusetts 02115
| | - Mehdi Mesri
- National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
| | - Henry Rodriguez
- National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
| | - Paul Rudnick
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Pawel Sadowski
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, New York 10016
| | - Nell Sedransk
- National Institute of Statistical Sciences, Research Triangle Park, North Carolina 27709
| | - Kent Shaddox
- Department of Biochemistry, Vanderbilt University School of Medicine, and the Jim Ayers Institute for Precancer Detection and Diagnosis, Vanderbilt-Ingram Cancer Center, Nashville, Tennessee 37232
| | - Stephen J Skates
- Biostatistics Center, Massachusetts General Hospital, Boston, Massachusetts 02114
| | - Eric Kuhn
- From the Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142
| | - Derek Smith
- University of Victoria-Genome BC Proteomics Centre, Victoria, British Columbia V8Z 7X8 CAN
| | | | - Corbin Whitwell
- Department of Biochemistry, Vanderbilt University School of Medicine, and the Jim Ayers Institute for Precancer Detection and Diagnosis, Vanderbilt-Ingram Cancer Center, Nashville, Tennessee 37232
| | - Shucha Zhang
- Fred Hutchinson Cancer Research Center, Seattle, Washington 98109
| | - Christoph H Borchers
- University of Victoria-Genome BC Proteomics Centre, Victoria, British Columbia V8Z 7X8 CAN
| | - Susan J Fisher
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, San Francisco, California 94143
| | | | - Daniel C Liebler
- Department of Biochemistry, Vanderbilt University School of Medicine, and the Jim Ayers Institute for Precancer Detection and Diagnosis, Vanderbilt-Ingram Cancer Center, Nashville, Tennessee 37232
| | - Michael J MacCoss
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington 98195
| | - Thomas A Neubert
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, New York 10016
| | | | | | - Paul Tempst
- Memorial Sloan-Kettering Cancer Center, New York, New York 10065
| | - Steven A Carr
- From the Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142;
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11
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Williams KE, Miroshnychenko O, Johansen EB, Niles RK, Sundaram R, Kannan K, Albertolle M, Zhou Y, Prasad N, Drake PM, Giudice LC, Hall SC, Witkowska HE, Buck Louis GM, Fisher SJ. Urine, peritoneal fluid and omental fat proteomes of reproductive age women: Endometriosis-related changes and associations with endocrine disrupting chemicals. J Proteomics 2014; 113:194-205. [PMID: 25284053 DOI: 10.1016/j.jprot.2014.09.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [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: 04/16/2014] [Revised: 09/08/2014] [Accepted: 09/22/2014] [Indexed: 02/06/2023]
Abstract
UNLABELLED Endometriosis, ectopic growth of the uterine lining (endometrium), which affects 6-11% of reproductive age women, is associated with pelvic pain and infertility. We investigated the peritoneal fluid (PF), urine and omental fat (OF) proteomes of women with endometriosis vs. individuals with no surgically visualized endometriosis. All participants were enrolled in the NICHD-funded ENDO Study. A two-step proteomic study was performed. The first, a broad survey, employed a semi-quantitative gel LC-mass spectrometry (MS) workflow: SDS PAGE fractionation, trypsin digestion and LC-MS/MS. The results showed sample integrity but failed to detect any differences between women with and without endometriosis. The second step was a quantitative analysis of OF samples. We employed another sample set (n=30) from women ± disease and isobaric mass-tag (iTRAQ) chemistry to label peptides and 2D LC-MS/MS for protein identification and quantification. Three proteins-matrix metalloproteinase-9, neutrophil elastase, and FAM49B-were significantly lower in abundance in samples from women with endometriosis. Interestingly, neutrophil elastase and FAM49B levels were associated with higher levels of a subset of endocrine disrupting chemicals (EDCs) that were previously measured in the same samples. The results of these experiments showed the feasibility of associating endometriosis with changes in the OF protein repertoire and EDC levels. BIOLOGICAL SIGNIFICANCE Endometriosis, pathological growth of the uterine lining, is associated with significant morbidities, including pain and infertility. However, the causes of this common condition are poorly understood. This study determined whether endometriosis was associated with changes in the protein composition of peritoneal fluid, urine and/or omental fat. A protein of unknown function (FAM49B) and two proteinases (metalloproteinase-9, neutrophil elastase) were down regulated in OF samples from women with versus without endometriosis. These findings suggested proteinase imbalances at sites that were distant from the endometriotic lesions. Additionally, FAM49B and neutrophil elastase levels were associated with higher levels of a subset of environmental chemicals that were quantified in the same samples, suggesting other possible associations. Thus, this work generated hypotheses that will be tested in further studies.
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Affiliation(s)
- Katherine E Williams
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA; Center for Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Olga Miroshnychenko
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA
| | - Eric B Johansen
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA
| | - Richard K Niles
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA
| | - Rajeshwari Sundaram
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - Kurunthachalam Kannan
- Wadsworth Center, New York State Department of Health, Empire State Plaza, Albany, NY, USA
| | - Matthew Albertolle
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA
| | - Yan Zhou
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA; The Eli & Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California San Francisco, San Francisco, CA, USA
| | - Namrata Prasad
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA; Center for Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Penelope M Drake
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA
| | - Linda C Giudice
- Center for Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Steven C Hall
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA; Center for Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - H Ewa Witkowska
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA; Center for Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Germaine M Buck Louis
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - Susan J Fisher
- Sandler-Moore Mass Spectrometry Core Facility, University of California San Francisco, San Francisco, CA, USA; Center for Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA; Division of Maternal Fetal Medicine, University of California San Francisco, San Francisco, CA, USA; The Eli & Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California San Francisco, San Francisco, CA, USA; Human Embryonic Stem Cell Program, University of California San Francisco, San Francisco, CA, USA; Department of Anatomy, University of California San Francisco, San Francisco, CA, USA.
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12
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Abbatiello SE, Mani DR, Schilling B, Maclean B, Zimmerman LJ, Feng X, Cusack MP, Sedransk N, Hall SC, Addona T, Allen S, Dodder NG, Ghosh M, Held JM, Hedrick V, Inerowicz HD, Jackson A, Keshishian H, Kim JW, Lyssand JS, Riley CP, Rudnick P, Sadowski P, Shaddox K, Smith D, Tomazela D, Wahlander A, Waldemarson S, Whitwell CA, You J, Zhang S, Kinsinger CR, Mesri M, Rodriguez H, Borchers CH, Buck C, Fisher SJ, Gibson BW, Liebler D, Maccoss M, Neubert TA, Paulovich A, Regnier F, Skates SJ, Tempst P, Wang M, Carr SA. Design, implementation and multisite evaluation of a system suitability protocol for the quantitative assessment of instrument performance in liquid chromatography-multiple reaction monitoring-MS (LC-MRM-MS). Mol Cell Proteomics 2013; 12:2623-39. [PMID: 23689285 DOI: 10.1074/mcp.m112.027078] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Multiple reaction monitoring (MRM) mass spectrometry coupled with stable isotope dilution (SID) and liquid chromatography (LC) is increasingly used in biological and clinical studies for precise and reproducible quantification of peptides and proteins in complex sample matrices. Robust LC-SID-MRM-MS-based assays that can be replicated across laboratories and ultimately in clinical laboratory settings require standardized protocols to demonstrate that the analysis platforms are performing adequately. We developed a system suitability protocol (SSP), which employs a predigested mixture of six proteins, to facilitate performance evaluation of LC-SID-MRM-MS instrument platforms, configured with nanoflow-LC systems interfaced to triple quadrupole mass spectrometers. The SSP was designed for use with low multiplex analyses as well as high multiplex approaches when software-driven scheduling of data acquisition is required. Performance was assessed by monitoring of a range of chromatographic and mass spectrometric metrics including peak width, chromatographic resolution, peak capacity, and the variability in peak area and analyte retention time (RT) stability. The SSP, which was evaluated in 11 laboratories on a total of 15 different instruments, enabled early diagnoses of LC and MS anomalies that indicated suboptimal LC-MRM-MS performance. The observed range in variation of each of the metrics scrutinized serves to define the criteria for optimized LC-SID-MRM-MS platforms for routine use, with pass/fail criteria for system suitability performance measures defined as peak area coefficient of variation <0.15, peak width coefficient of variation <0.15, standard deviation of RT <0.15 min (9 s), and the RT drift <0.5min (30 s). The deleterious effect of a marginally performing LC-SID-MRM-MS system on the limit of quantification (LOQ) in targeted quantitative assays illustrates the use and need for a SSP to establish robust and reliable system performance. Use of a SSP helps to ensure that analyte quantification measurements can be replicated with good precision within and across multiple laboratories and should facilitate more widespread use of MRM-MS technology by the basic biomedical and clinical laboratory research communities.
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Affiliation(s)
- Susan E Abbatiello
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA.
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13
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Walian PJ, Allen S, Shatsky M, Zeng L, Szakal ED, Liu H, Hall SC, Fisher SJ, Lam BR, Singer ME, Geller JT, Brenner SE, Chandonia JM, Hazen TC, Witkowska HE, Biggin MD, Jap BK. High-throughput isolation and characterization of untagged membrane protein complexes: outer membrane complexes of Desulfovibrio vulgaris. J Proteome Res 2012; 11:5720-35. [PMID: 23098413 PMCID: PMC3516867 DOI: 10.1021/pr300548d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Cell membranes represent the “front line”
of cellular defense and the interface between a cell and its environment.
To determine the range of proteins and protein complexes that are
present in the cell membranes of a target organism, we have utilized
a “tagless” process for the system-wide isolation and
identification of native membrane protein complexes. As an initial
subject for study, we have chosen the Gram-negative sulfate-reducing
bacterium Desulfovibrio vulgaris. With this tagless
methodology, we have identified about two-thirds of the outer membrane-
associated proteins anticipated. Approximately three-fourths of these
appear to form homomeric complexes. Statistical and machine-learning
methods used to analyze data compiled over multiple experiments revealed
networks of additional protein–protein interactions providing
insight into heteromeric contacts made between proteins across this
region of the cell. Taken together, these results establish a D. vulgaris outer membrane protein data set that will be
essential for the detection and characterization of environment-driven
changes in the outer membrane proteome and in the modeling of stress
response pathways. The workflow utilized here should be effective
for the global characterization of membrane protein complexes in a
wide range of organisms.
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Affiliation(s)
- Peter J Walian
- Lawrence Berkeley National Laboratory, Berkeley, California, United States.
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Drake PM, Schilling B, Niles RK, Prakobphol A, Li B, Jung K, Cho W, Braten M, Inerowicz HD, Williams K, Albertolle M, Held JM, Iacovides D, Sorensen DJ, Griffith OL, Johansen E, Zawadzka AM, Cusack MP, Allen S, Gormley M, Hall SC, Witkowska HE, Gray JW, Regnier F, Gibson BW, Fisher SJ. Lectin chromatography/mass spectrometry discovery workflow identifies putative biomarkers of aggressive breast cancers. J Proteome Res 2012; 11:2508-20. [PMID: 22309216 DOI: 10.1021/pr201206w] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We used a lectin chromatography/MS-based approach to screen conditioned medium from a panel of luminal (less aggressive) and triple negative (more aggressive) breast cancer cell lines (n=5/subtype). The samples were fractionated using the lectins Aleuria aurantia (AAL) and Sambucus nigra agglutinin (SNA), which recognize fucose and sialic acid, respectively. The bound fractions were enzymatically N-deglycosylated and analyzed by LC-MS/MS. In total, we identified 533 glycoproteins, ∼90% of which were components of the cell surface or extracellular matrix. We observed 1011 glycosites, 100 of which were solely detected in ≥3 triple negative lines. Statistical analyses suggested that a number of these glycosites were triple negative-specific and thus potential biomarkers for this tumor subtype. An analysis of RNaseq data revealed that approximately half of the mRNAs encoding the protein scaffolds that carried potential biomarker glycosites were up-regulated in triple negative vs luminal cell lines, and that a number of genes encoding fucosyl- or sialyltransferases were differentially expressed between the two subtypes, suggesting that alterations in glycosylation may also drive candidate identification. Notably, the glycoproteins from which these putative biomarker candidates were derived are involved in cancer-related processes. Thus, they may represent novel therapeutic targets for this aggressive tumor subtype.
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Affiliation(s)
- Penelope M Drake
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, 513 Parnassus Avenue, Box 0665, San Francisco, California 94143, United States
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15
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Affiliation(s)
- H Ewa Witkowska
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
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16
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Liu H, Yang L, Khainovski N, Dong M, Hall SC, Fisher SJ, Biggin MD, Jin J, Witkowska HE. Automated Iterative MS/MS Acquisition: A Tool for Improving Efficiency of Protein Identification Using a LC–MALDI MS Workflow. Anal Chem 2011; 83:6286-93. [DOI: 10.1021/ac200911v] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Haichuan Liu
- UCSF Sandler-Moore Mass Spectrometry Core Facility and Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, California 94143, United States
| | - Lee Yang
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | | | - Ming Dong
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Steven C. Hall
- UCSF Sandler-Moore Mass Spectrometry Core Facility and Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, California 94143, United States
| | - Susan J. Fisher
- UCSF Sandler-Moore Mass Spectrometry Core Facility and Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, California 94143, United States
| | - Mark D. Biggin
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jian Jin
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - H. Ewa Witkowska
- UCSF Sandler-Moore Mass Spectrometry Core Facility and Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, California 94143, United States
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17
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Abstract
OBJECTIVES To assess the clinical efficacy of the self-pressurized air-Q ILA™ (ILA-SP). AIM The purpose of this prospective audit was to evaluate the feasibility of the ILA-SP in clinical practice and generate data for future comparison trials. BACKGROUND The ILA-SP is a new first-generation supraglottic airway for children with a self-adjusting cuff and lack of a pilot balloon. METHODS Over a 4-month period, 352 children with an ASA physical status of I-III, newborn to 18 years of age, undergoing various procedures were studied. Data points assessed included insertion success rates, airway leak pressures, quality of ventilation, and perioperative complications associated with the use of this device. RESULTS In 349 of the 352 patients in this study, the ILA-SP was used successfully as a primary supraglottic airway device in a variety of patients. Three patients required conversion to a standard laryngeal mask airway or a tracheal tube. The mean initial airway leak pressure for all patients was 17.8 ± 5.4 cm H(2)O, and 20.4 ± 5.5 cm H(2)O when re-checked at 10 min, which was statistically significant (P < 0.001). Complications were limited to 14 patients and related to reflex activation of the airway (coughing, laryngospasm, and bronchospasm) (n = 10), sore throat (n = 3), and blood staining on removal of the device (n = 1). There were no episodes of regurgitation, aspiration, or hoarseness. CONCLUSIONS Acceptable clinical performance was demonstrated with the ILA-SP for a variety of procedures in infants and children with spontaneous and positive pressure ventilation. Future studies comparing this device to other supraglottic airways may provide useful information regarding the safety of the ILA-SP in pediatric clinical practice.
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Affiliation(s)
- Narasimhan Jagannathan
- Department of Pediatric Anesthesiology, Children's Memorial Hospital, Northwestern University Feinberg School of Medicine, Chicago, IL 60614, USA.
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18
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Johansen E, Schilling B, Lerch M, Niles RK, Liu H, Li B, Allen S, Hall SC, Witkowska HE, Regnier FE, Gibson BW, Fisher SJ, Drake PM. A lectin HPLC method to enrich selectively-glycosylated peptides from complex biological samples. J Vis Exp 2009:1398. [PMID: 19798022 PMCID: PMC2762330 DOI: 10.3791/1398] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Glycans are an important class of post-translational modifications. Typically found on secreted and extracellular molecules, glycan structures signal the internal status of the cell. Glycans on tumor cells tend to have abundant sialic acid and fucose moieties. We propose that these cancer-associated glycan variants be exploited for biomarker development aimed at diagnosing early-stage disease. Accordingly, we developed a mass spectrometry-based workflow that incorporates chromatography on affinity matrices formed from lectins, proteins that bind specific glycan structures. The lectins Sambucus nigra (SNA) and Aleuria aurantia (AAL), which bind sialic acid and fucose, respectively, were covalently coupled to POROS beads (Applied Biosystems) and packed into PEEK columns for high pressure liquid chromatography (HPLC). Briefly, plasma was depleted of the fourteen most abundant proteins using a multiple affinity removal system (MARS-14; Agilent). Depleted plasma was trypsin-digested and separated into flow-through and bound fractions by SNA or AAL HPLC. The fractions were treated with PNGaseF to remove N-linked glycans, and analyzed by LC-MS/MS on a QStar Elite. Data were analyzed using Mascot software. The experimental design included positive controls—fucosylated and sialylated human lactoferrin glycopeptides—and negative controls—high mannose glycopeptides from Saccharomyces cerevisiae—that were used to monitor the specificity of lectin capture. Key features of this workflow include the reproducibility derived from the HPLC format, the positive identification of the captured and PNGaseF-treated glycopeptides from their deamidated Asn-Xxx-Ser/Thr motifs, and quality assessment using glycoprotein standards. Protocol optimization also included determining the appropriate ratio of starting material to column capacity, identifying the most efficient capture and elution buffers, and monitoring the PNGaseF-treatment to ensure full deglycosylation. Future directions include using this workflow to perform mass spectrometry-based discovery experiments on plasma from breast cancer patients and control individuals.
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Affiliation(s)
- Eric Johansen
- Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA
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19
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Addona TA, Abbatiello SE, Schilling B, Skates SJ, Mani DR, Bunk DM, Spiegelman CH, Zimmerman LJ, Ham AJL, Keshishian H, Hall SC, Allen S, Blackman RK, Borchers CH, Buck C, Cardasis HL, Cusack MP, Dodder NG, Gibson BW, Held JM, Hiltke T, Jackson A, Johansen EB, Kinsinger CR, Li J, Mesri M, Neubert TA, Niles RK, Pulsipher TC, Ransohoff D, Rodriguez H, Rudnick PA, Smith D, Tabb DL, Tegeler TJ, Variyath AM, Vega-Montoto LJ, Wahlander Å, Waldemarson S, Wang M, Whiteaker JR, Zhao L, Anderson NL, Fisher SJ, Liebler DC, Paulovich AG, Regnier FE, Tempst P, Carr SA. Erratum: Corrigendum: Multi-site assessment of the precision and reproducibility of multiple reaction monitoring–based measurements of proteins in plasma. Nat Biotechnol 2009. [DOI: 10.1038/nbt0909-864b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Vazquez J, Hall SC, Greco MA. Protein expression is altered during spontaneous sleep in aged Sprague Dawley rats. Brain Res 2009; 1298:37-45. [PMID: 19729003 DOI: 10.1016/j.brainres.2009.08.064] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Revised: 07/28/2009] [Accepted: 08/21/2009] [Indexed: 11/25/2022]
Abstract
Age-related changes in brain function include those affecting learning, memory, and sleep-wakefulness. Sleep-wakefulness is an essential behavior that results from the interaction of multiple brain regions, peptides, and neurotransmitters. The biological function(s) of sleep, however, remains unknown due to a paucity of information available at the cellular level. Aged rats exhibit alterations in the circadian and homeostatic influences associated with sleep-wake regulation. We recently showed that alterations in cortical profiles occur after timed bouts of spontaneous sleep in young rats. Examination of the cellular response to sleep-wake in old rats may thus provide insight(s) into the biological function(s) of sleep. To test this hypothesis, we monitored cortical profiles in the frontal cortex of young and old Sprague-Dawley rats after timed bouts of spontaneous sleep-wake behavior. Proteins were separated by two-dimensional electrophoresis (2-DE), visualized by fluorescent staining, imaged, and analyzed as a function of behavioral state and age. Old rats showed a 6-fold increase in total protein expression, independent of the behavioral state at sacrifice. When analyzed according to age and behavioral state, there was a decrease (approximately 46%) in the number of phospho-spots present during SWS in aged animals. SWS-associated spots present only in old animals were associated with multiple functions including vesicular transport, cell signaling, oxidation state, cytoskeletal support, and energy metabolism. These data suggest that the intracellular response to the signaling associated with spontaneous sleep is affected by age and is consistent with the idea that the ability of sleep to fulfill its function(s) may become diminished with age.
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Affiliation(s)
- Jacqueline Vazquez
- Behavioral Biochemistry Laboratory, Biosciences Division, SRI International, 333 Ravenswood Ave., Menlo Park, CA 94025, USA
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21
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Goodhead DT, Belli M, Mill AJ, Bance DA, Allen LA, Hall SC, Ianzani F, Simone G, Stevens DL, Stretch A. Direct Comparison between Protons and Alpha-particles of the Same LET: I. Irradiation Methods and Inactivation of Asynchronous V79, HeLa and C3H 10T½ Cells. Int J Radiat Biol 2009; 61:611-24. [PMID: 1349625 DOI: 10.1080/09553009214551421] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [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: 10/23/2022]
Abstract
A direct comparison was carried out of the biological effectiveness of protons and alpha-particles of the same linear energy transfer (LET) under identical conditions with a variety of in vitro biological systems. Monolayers of mammalian cells were irradiated with accelerated beams of protons (1.2 and 1.4 MeV) and alpha-particles (30 and 35 MeV) corresponding to LETs of 23 and 20 keV microns-1 for each particle type. For V79-4 cells it was observed that the linear term of the dose-response for cell inactivation by protons was significantly greater than that for alpha-particles of the same LET. For HeLa and HeLa S3 cells, also, the linear term appeared to be greater for protons, but this was not observed with more limited data for C3H 10T1/2 cells. The result for V79 cells is in agreement with the report of Belli et al. (1989) who observed that the biological effectiveness of protons rose sharply between 17 and 30 keV microns-1 in strong contrast to alpha-particles which reached a peak effectiveness at greater than 100 keV microns-1. These results place new constraints on the biologically relevant features of the microscopic structure of radiation tracks, and have implications for the mechanistic and practical comparison between radiations.
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Affiliation(s)
- D T Goodhead
- Medical Research Council, Radiobiology Unit, Didcot, Oxon, UK
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22
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Addona TA, Abbatiello SE, Schilling B, Skates SJ, Mani DR, Bunk DM, Spiegelman CH, Zimmerman LJ, Ham AJL, Keshishian H, Hall SC, Allen S, Blackman RK, Borchers CH, Buck C, Cardasis HL, Cusack MP, Dodder NG, Gibson BW, Held JM, Hiltke T, Jackson A, Johansen EB, Kinsinger CR, Li J, Mesri M, Neubert TA, Niles RK, Pulsipher TC, Ransohoff D, Rodriguez H, Rudnick PA, Smith D, Tabb DL, Tegeler TJ, Variyath AM, Vega-Montoto LJ, Wahlander A, Waldemarson S, Wang M, Whiteaker JR, Zhao L, Anderson NL, Fisher SJ, Liebler DC, Paulovich AG, Regnier FE, Tempst P, Carr SA. Multi-site assessment of the precision and reproducibility of multiple reaction monitoring-based measurements of proteins in plasma. Nat Biotechnol 2009; 27:633-41. [PMID: 19561596 DOI: 10.1038/nbt.1546] [Citation(s) in RCA: 819] [Impact Index Per Article: 54.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2009] [Accepted: 05/31/2009] [Indexed: 01/13/2023]
Abstract
Verification of candidate biomarkers relies upon specific, quantitative assays optimized for selective detection of target proteins, and is increasingly viewed as a critical step in the discovery pipeline that bridges unbiased biomarker discovery to preclinical validation. Although individual laboratories have demonstrated that multiple reaction monitoring (MRM) coupled with isotope dilution mass spectrometry can quantify candidate protein biomarkers in plasma, reproducibility and transferability of these assays between laboratories have not been demonstrated. We describe a multilaboratory study to assess reproducibility, recovery, linear dynamic range and limits of detection and quantification of multiplexed, MRM-based assays, conducted by NCI-CPTAC. Using common materials and standardized protocols, we demonstrate that these assays can be highly reproducible within and across laboratories and instrument platforms, and are sensitive to low mug/ml protein concentrations in unfractionated plasma. We provide data and benchmarks against which individual laboratories can compare their performance and evaluate new technologies for biomarker verification in plasma.
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Affiliation(s)
- Terri A Addona
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
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23
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Abstract
In enzymatic (18)O-labeling strategies for quantitative proteomics, the exchange of carboxyl oxygens at low pH is a common, undesired side reaction. We asked if acid-catalyzed back exchange could interfere with quantitation and whether the reaction itself could be used as method for introducing (18)O label into peptides. Several synthetic peptides were dissolved in dilute acid containing 50% (v/v) H(2)(18)O and incubated at room temperature. Aliquots were removed over a period of 3 weeks and analyzed by tandem mass spectrometry (MS/MS). (18)O-incorporation ratios were determined by linear regression analysis that allowed for multiple stable-isotope incorporations. At low pH, peptides exchanged their carboxyl oxygen atoms with the aqueous solvent. The isotope patterns gradually shifted to higher masses until they reached the expected binomial distribution at equilibrium after approximately 11 days. Reaction rates were residue- and sequence-specific. Due to its slow nature, the acid-catalyzed back exchange is expected to minimally interfere with enzymatic (18)O-labeling studies provided that storage and analysis conditions minimize low-pH exposure times. On its own, acid-catalyzed (18)O labeling is a general tagging strategy that is an alternative to the chemical, metabolic, and enzymatic isotope-labeling schemes currently used in quantitative proteomics.
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Affiliation(s)
- Richard Niles
- Department of Cell and Tissue Biology, University of CaliforniaSan Francisco, San Francisco, California 94143, USA
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24
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Vazquez J, Hall SC, Witkowska HE, Greco MA. Rapid alterations in cortical protein profiles underlie spontaneous sleep and wake bouts. J Cell Biochem 2008; 105:1472-84. [DOI: 10.1002/jcb.21970] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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25
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Robinson S, Niles RK, Witkowska HE, Rittenbach KJ, Nichols RJ, Sargent JA, Dixon SE, Prakobphol A, Hall SC, Fisher SJ, Hardt M. A mass spectrometry-based strategy for detecting and characterizing endogenous proteinase activities in complex biological samples. Proteomics 2008; 8:435-45. [PMID: 18186022 DOI: 10.1002/pmic.200700680] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Endogenous proteinases in biological fluids such as human saliva produce a rich peptide repertoire that reflects a unique combination of enzymes, substrates, and inhibitors/activators. Accordingly, this subproteome is an interesting source of biomarkers for disease processes that either directly or indirectly involve proteolysis. However, the relevant proteinases, typically very low abundance molecules, are difficult to classify and identify. We hypothesized that a sensitive technique for monitoring accumulated peptide products in an unbiased, global manner would be very useful for detecting and profiling proteolytic activities in complex biological samples. Building on the longstanding use of 18O isotope-based approaches for the classification of proteolytic and other enzymatic processes we devised a new method for evaluating endogenous proteinases. Specifically, we showed that upon ex vivo incubation endogenous proteinases in human parotid saliva introduced 18O from isotopically enriched water into the C-terminal carboxylic groups of their peptide products. Subsequent peptide sequence determination and inhibitor profiling enabled the detection of discrete subsets of proteolytic products that were generated by different enzymes. As a proof-of-principle we used one of these fingerprints to identify the relevant activity as tissue kallikrein. We termed this technique PALeO. Our results suggest that PALeO is a rapid and highly sensitive method for globally assessing proteinase activities in complex biological samples.
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Affiliation(s)
- Sarah Robinson
- Department of Cell and Tissue Biology, University of California-San Francisco, San Francisco, CA, USA
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26
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Denny P, Hagen FK, Hardt M, Liao L, Yan W, Arellanno M, Bassilian S, Bedi GS, Boontheung P, Cociorva D, Delahunty CM, Denny T, Dunsmore J, Faull KF, Gilligan J, Gonzalez-Begne M, Halgand F, Hall SC, Han X, Henson B, Hewel J, Hu S, Jeffrey S, Jiang J, Loo JA, Ogorzalek Loo RR, Malamud D, Melvin JE, Miroshnychenko O, Navazesh M, Niles R, Park SK, Prakobphol A, Ramachandran P, Richert M, Robinson S, Sondej M, Souda P, Sullivan MA, Takashima J, Than S, Wang J, Whitelegge JP, Witkowska HE, Wolinsky L, Xie Y, Xu T, Yu W, Ytterberg J, Wong DT, Yates JR, Fisher SJ. The proteomes of human parotid and submandibular/sublingual gland salivas collected as the ductal secretions. J Proteome Res 2008; 7:1994-2006. [PMID: 18361515 DOI: 10.1021/pr700764j] [Citation(s) in RCA: 320] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Saliva is a body fluid with important functions in oral and general health. A consortium of three research groups catalogued the proteins in human saliva collected as the ductal secretions: 1166 identifications--914 in parotid and 917 in submandibular/sublingual saliva--were made. The results showed that a high proportion of proteins that are found in plasma and/or tears are also present in saliva along with unique components. The proteins identified are involved in numerous molecular processes ranging from structural functions to enzymatic/catalytic activities. As expected, the majority mapped to the extracellular and secretory compartments. An immunoblot approach was used to validate the presence in saliva of a subset of the proteins identified by mass spectrometric approaches. These experiments focused on novel constituents and proteins for which the peptide evidence was relatively weak. Ultimately, information derived from the work reported here and related published studies can be used to translate blood-based clinical laboratory tests into a format that utilizes saliva. Additionally, a catalogue of the salivary proteome of healthy individuals allows future analyses of salivary samples from individuals with oral and systemic diseases, with the goal of identifying biomarkers with diagnostic and/or prognostic value for these conditions; another possibility is the discovery of therapeutic targets.
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Affiliation(s)
- Paul Denny
- School of Dentistry, University of Southern California, Los Angeles, California 90089, USA
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27
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Dong M, Yang LL, Williams K, Fisher SJ, Hall SC, Biggin MD, Jin J, Witkowska HE. A “Tagless” Strategy for Identification of Stable Protein Complexes Genome-wide by Multidimensional Orthogonal Chromatographic Separation and iTRAQ Reagent Tracking. J Proteome Res 2008; 7:1836-49. [DOI: 10.1021/pr700624e] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ming Dong
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, Applied Biosystems, Foster City, California 94404, UCSF Mass Spectrometry Core Facility and Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California 94143, and Virtual Institute for Microbial Stress and Survival, Berkeley, California 94720
| | - Lee Lisheng Yang
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, Applied Biosystems, Foster City, California 94404, UCSF Mass Spectrometry Core Facility and Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California 94143, and Virtual Institute for Microbial Stress and Survival, Berkeley, California 94720
| | - Katherine Williams
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, Applied Biosystems, Foster City, California 94404, UCSF Mass Spectrometry Core Facility and Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California 94143, and Virtual Institute for Microbial Stress and Survival, Berkeley, California 94720
| | - Susan J. Fisher
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, Applied Biosystems, Foster City, California 94404, UCSF Mass Spectrometry Core Facility and Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California 94143, and Virtual Institute for Microbial Stress and Survival, Berkeley, California 94720
| | - Steven C. Hall
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, Applied Biosystems, Foster City, California 94404, UCSF Mass Spectrometry Core Facility and Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California 94143, and Virtual Institute for Microbial Stress and Survival, Berkeley, California 94720
| | - Mark D. Biggin
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, Applied Biosystems, Foster City, California 94404, UCSF Mass Spectrometry Core Facility and Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California 94143, and Virtual Institute for Microbial Stress and Survival, Berkeley, California 94720
| | - Jian Jin
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, Applied Biosystems, Foster City, California 94404, UCSF Mass Spectrometry Core Facility and Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California 94143, and Virtual Institute for Microbial Stress and Survival, Berkeley, California 94720
| | - H. Ewa Witkowska
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, Applied Biosystems, Foster City, California 94404, UCSF Mass Spectrometry Core Facility and Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California 94143, and Virtual Institute for Microbial Stress and Survival, Berkeley, California 94720
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28
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Hardt M, Witkowska HE, Webb S, Thomas LR, Dixon SE, Hall SC, Fisher SJ. Assessing the effects of diurnal variation on the composition of human parotid saliva: quantitative analysis of native peptides using iTRAQ reagents. Anal Chem 2007; 77:4947-54. [PMID: 16053308 DOI: 10.1021/ac050161r] [Citation(s) in RCA: 130] [Impact Index Per Article: 7.6] [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: 11/28/2022]
Abstract
Changes in salivary composition correlate with disease susceptibility, disease state, or both. However, use of saliva for diagnostic purposes is complicated by the gland-specific effects of circadian rhythm or diurnal variation. We recently characterized a suite of peptides in the < or =10-kDa fraction of human parotid saliva that included many novel species. In this study, we used novel iTRAQ labeling chemistry to investigate possible diurnal effects on peptide generation. We collected samples produced by gustatory stimulation as the ductal secretions at four time points under conditions that minimized proteolysis, pooled them according to collection time, and isolated the LMW fractions. Samples collected at each collection time were derivatized with a different isobaric iTRAQ reagent. The labeled samples were combined, separated by reversed-phase HPLC, co-spotted with matrix on MALDI targets, and analyzed by MALDI TOF/TOF mass spectrometry. With this approach, we achieved relative quantification of the parotid peptides at four time points. In several cases, abundance during the day changed dramatically. iTRAQ tagging improved the efficiency of MS/MS fragmentation, which in turn allowed the identification of several novel peptides. Our results demonstrated both the utility of this method and the importance of diurnal effects on the composition of the human parotid saliva peptidome.
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Affiliation(s)
- Markus Hardt
- Departments of Cell and Tissue Biology, University of California San Francisco, CA 94143, USA
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29
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Peters-Libeu CA, Newhouse Y, Hall SC, Witkowska HE, Weisgraber KH. Apolipoprotein E*dipalmitoylphosphatidylcholine particles are ellipsoidal in solution. J Lipid Res 2007; 48:1035-44. [PMID: 17308333 DOI: 10.1194/jlr.m600545-jlr200] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [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: 11/20/2022] Open
Abstract
Apolipoprotein E (apoE) is a major protein component of cholesterol-transporting lipoprotein particles in the central nervous system and in plasma. Polymorphisms of apoE are associated with cardiovascular disease and with a predisposition to Alzheimer's disease and other forms of neurodegeneration. For full biological activity, apoE must be bound to a lipoprotein particle. Complexes of apoE and phospholipid mimic many of these activities. In contrast to a widely accepted discoidal model of apoA-I bound to dimyristoylphosphatidylcholine, which is based on solution studies, an X-ray diffraction study of apoE bound to dipalmitoylphosphatidylcholine (DPPC) indicated that apoE*DPPC particles are quasi-spheroidal and that the packing of the phospholipid core is similar to a micelle. Using small-angle X-ray scattering, we show that apoE*DPPC particles in solution are ellipsoidal and that the shape of the phospholipid core is compatible with a twisted-bilayer model. The proposed model is consistent with the results of mass spectrometric analysis of products of limited proteolysis. These revealed that the nonlipid-bound regions of apoE in the particle are consistent with an alpha-helical hairpin.
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Affiliation(s)
- Clare A Peters-Libeu
- Gladstone Institute of Neurological Disease, Biomolecular Resource Center Mass Spectrometry Facility, Department of Cell and Tissue Biology, University of California, San Francisco, CA 94158, USA
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Boonjakuakul JK, Gerns HL, Chen YT, Hicks LD, Minnick MF, Dixon SE, Hall SC, Koehler JE. Proteomic and immunoblot analyses of Bartonella quintana total membrane proteins identify antigens recognized by sera from infected patients. Infect Immun 2007; 75:2548-61. [PMID: 17307937 PMCID: PMC1865797 DOI: 10.1128/iai.01974-06] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [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: 01/24/2023] Open
Abstract
Bartonella quintana is a fastidious, gram-negative, rod-shaped bacterium that causes prolonged bacteremia in immunocompetent humans and severe infections in immunocompromised individuals. We sought to define the outer membrane subproteome of B. quintana in order to obtain insight into the biology and pathogenesis of this emerging pathogen and to identify the predominant B. quintana antigens targeted by the human immune system during infection. We isolated the total membrane proteins of B. quintana and identified 60 proteins by two-dimensional sodium dodecyl sulfate-polyacrylamide gel electrophoresis and peptide mass fingerprinting. Using the newly constructed proteome map, we then utilized two-dimensional immunoblotting with sera from 21 B. quintana-infected patients to identify 24 consistently recognized, immunoreactive B. quintana antigens that have potential relevance for pathogenesis and diagnosis. Among the outer membrane proteins, the variably expressed outer membrane protein adhesins (VompA and VompB), peptidyl-prolyl cis-trans-isomerase (PpI), and hemin-binding protein E (HbpE) were recognized most frequently by sera from patients, which is consistent with surface expression of these virulence factors during human infection.
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Affiliation(s)
- Jenni K Boonjakuakul
- Division of Infectious Diseases, 521 Parnassus Ave., Room C-443, University of California at San Francisco, San Francisco, CA 94143-0654, USA
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Hall SC. Poor inter-rater reliability on mock anesthesia oral examinations. Can J Anaesth 2006; 53:1268-9. [PMID: 17142667 DOI: 10.1007/bf03021594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Chiu YL, Witkowska HE, Hall SC, Santiago M, Soros VB, Esnault C, Heidmann T, Greene WC. High-molecular-mass APOBEC3G complexes restrict Alu retrotransposition. Proc Natl Acad Sci U S A 2006; 103:15588-93. [PMID: 17030807 PMCID: PMC1592537 DOI: 10.1073/pnas.0604524103] [Citation(s) in RCA: 198] [Impact Index Per Article: 11.0] [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: 11/18/2022] Open
Abstract
APOBEC3G (A3G) and related deoxycytidine deaminases are potent intrinsic antiretroviral factors. A3G is expressed either as an enzymatically active low-molecular-mass (LMM) form or as an enzymatically inactive high-molecular-mass (HMM) ribonucleoprotein complex. Resting CD4 T cells exclusively express LMM A3G, where it functions as a powerful postentry restriction factor for HIV-1. Activation of CD4 T cells promotes the recruitment of LMM A3G into 5- to 15-MDa HMM complexes whose function is unknown. Using tandem affinity purification techniques coupled with MS, we identified Staufen-containing RNA-transporting granules and Ro ribonucleoprotein complexes as specific components of HMM A3G complexes. Analysis of RNAs in these complexes revealed Alu and small Y RNAs, two of the most prominent nonautonomous mobile genetic elements in human cells. These retroelement RNAs are recruited into Staufen-containing RNA-transporting granules in the presence of A3G. Retrotransposition of Alu and hY RNAs depends on the reverse transcriptase machinery provided by long interspersed nucleotide elements 1 (L1). We now show that A3G greatly inhibits L1-dependent retrotransposition of marked Alu retroelements not by inhibiting L1 function but by sequestering Alu RNAs in cytoplasmic HMM A3G complexes away from the nuclear L1 enzymatic machinery. These findings identify nonautonomous Alu and hY retroelements as natural cellular targets of A3G and highlight how different forms of A3G uniquely protect cells from the threats posed by exogenous retroviruses (LMM A3G) and endogenous retroelements (HMM A3G).
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Affiliation(s)
- Ya-Lin Chiu
- *Gladstone Institute of Virology and Immunology, 1650 Owens Street, San Francisco, CA 94158
| | - H. Ewa Witkowska
- Biomolecular Resource Center, Mass Spectrometry Facility, University of California, San Francisco, CA 94143; and
| | - Steven C. Hall
- Biomolecular Resource Center, Mass Spectrometry Facility, University of California, San Francisco, CA 94143; and
| | - Mario Santiago
- *Gladstone Institute of Virology and Immunology, 1650 Owens Street, San Francisco, CA 94158
| | - Vanessa B. Soros
- *Gladstone Institute of Virology and Immunology, 1650 Owens Street, San Francisco, CA 94158
| | - Cécile Esnault
- Unité des Rétrovirus Endogénes et Eléments Rétroïdes des Eucaryotes Supérieurs, Centre National de la Recherche Scientifique Unité Mixte de Recherche 8122, Institut Gustave Roussy, 94805 Villejuif, France
| | - Thierry Heidmann
- Unité des Rétrovirus Endogénes et Eléments Rétroïdes des Eucaryotes Supérieurs, Centre National de la Recherche Scientifique Unité Mixte de Recherche 8122, Institut Gustave Roussy, 94805 Villejuif, France
| | - Warner C. Greene
- *Gladstone Institute of Virology and Immunology, 1650 Owens Street, San Francisco, CA 94158
- Departments of Medicine, Microbiology, and Immunology and
- To whom correspondence should be addressed. E-mail:
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Hardt M, Thomas LR, Dixon SE, Newport G, Agabian N, Prakobphol A, Hall SC, Witkowska HE, Fisher SJ. Toward defining the human parotid gland salivary proteome and peptidome: identification and characterization using 2D SDS-PAGE, ultrafiltration, HPLC, and mass spectrometry. Biochemistry 2005; 44:2885-99. [PMID: 15723531 DOI: 10.1021/bi048176r] [Citation(s) in RCA: 140] [Impact Index Per Article: 7.4] [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: 11/29/2022]
Abstract
Saliva plays many biological roles, from lubrication and digestion to regulating bacterial and leukocyte adhesion. To understand the functions of individual components and families of molecules, it is important to identify as many salivary proteins as possible. Toward this goal, we used a proteomic approach as the first step in a global analysis of this important body fluid. We collected parotid saliva as the ductal secretion from three human donors and separated the protein components by two-dimensional SDS-polyacrylamide gel electrophoresis (2D SDS-PAGE). Proteins in gel spots were identified by peptide mass fingerprinting, and the results were confirmed by tandem mass spectrometry of selected peptides. Complementing this approach we used ultrafiltration to prepare a low-molecular-weight fraction of parotid saliva, which was analyzed directly or after reversed phase high-performance liquid chromatography separation by using mass spectrometric approaches. MS analyses of 2D SDS-PAGE spots revealed known components of saliva, including cystatins, histatins, lysozyme, and isoforms and/or fragments of alpha-amylase, albumin, and proline-rich proteins. We also discovered novel proteins, such as several isoforms of Zn-alpha-2-glycoprotein and secretory actin-binding protein. MS analyses of the ultrafiltrate showed that the low-molecular-weight fraction of parotid saliva was peptide-rich, with novel fragments of proline-rich proteins and histatins in abundance. Experiments using Candida albicans as the test organism showed that at least one of the novel peptides had antifungal activity. Our results show that saliva is a rich source of proteins and peptides that are potential diagnostic and therapeutic targets.
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Affiliation(s)
- Markus Hardt
- Department of Cell and Tissue Biology, School of Dentistry, University of California at San Francisco, 513 Parnassus Avenue, San Francisco, California 94143, USA
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Scheffler NK, Falick AM, Hall SC, Ray WC, Post DM, Munson RS, Gibson BW. Proteome of Haemophilus ducreyi by 2-D SDS-PAGE and Mass Spectrometry: Strain Variation, Virulence, and Carbohydrate Expression. J Proteome Res 2003; 2:523-33. [PMID: 14582649 DOI: 10.1021/pr0340025] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have analyzed the proteome of several strains of Haemophilus ducreyi by two-dimensional gel electrophoresis (2-DE) and mass spectrometry. Over 100 spots were analyzed from the soluble and insoluble protein fractions from the prototype strain 35000HP and 122 distinct proteins were identified. Functions of approximately 80% of the 122 proteins were deduced by identification with close homologues of Haemophilus influenzae. Four additional wild type and three mutant strains were also analyzed that vary in their virulence and/or outer-membrane lipooligosaccharide structures. Overall, the 2-DE gel maps of the wild type and mutant strains were similar to strain 35000HP, suggesting little proteome diversity in relation to carbohydrate expression and/or virulence. An exception was the Kenyan strain 33921 which contained significant differences in its proteome 2-DE map and also synthesizes an unusual LOS with a trisaccharide branch structure. This African strain may represent a prototype of a second clonal group of H. ducreyi.
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Go EP, Prenni JE, Wei J, Jones A, Hall SC, Witkowska HE, Shen Z, Siuzdak G. Desorption/ionization on silicon time-of-flight/time-of-flight mass spectrometry. Anal Chem 2003; 75:2504-6. [PMID: 12918997 DOI: 10.1021/ac026253n] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.8] [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: 11/30/2022]
Abstract
Desorption/ionization on silicon (DIOS) tandem time-of-flight (TOF/TOF) mass spectrometry (MS) provides high accuracy and significant fragmentation information, particularly in the characterization of biomolecules. DIOS TOF/TOF offers a high-throughput surface-based ionization platform as well as complete fragmentation through high collision energies. The absence of matrix interference in DIOS allows for the MS and MS/MS analysis of small molecules well below m/z 300. In addition, sample preparation is minimal, and the DIOS chips can be stored and reanalyzed for fragmentation information or accurate mass measurements. The combined benefits of robustness, minimal sample preparation, good sensitivity, high throughput, and sequencing capability make DIOS TOF/TOF a powerful tool for small molecule characterization and protein identification.
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Affiliation(s)
- Eden P Go
- Center for Mass Spectrometry, The Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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Abstract
IMPLICATIONS Chemotherapy for cancer is associated with pain including cutaneous vasculitis. Magnesium, an N-methyl-D-aspartic acid-receptor antagonist, was used successfully to treat an adolescent with pain caused by cutaneous vasculitis secondary to methotrexate therapy.
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Affiliation(s)
- Santhanam Suresh
- Department of *Pediatric Anesthesiology, Children's Memorial Hospital, and †Department of Anesthesiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois; and ‡Division of Anesthesiology, The Cleveland Clinic Foundation, Cleveland, Ohio
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Greeley WJ, Birmingham PK, Wheeler M, Suresh S, Dsida RM, Rae BR, Obrecht J, Andreoni VA, Hall SC, Coté CJ. Patient-controlled epidural analgesia in children: can they do it? Anesth Analg 2003; 96:686-691. [PMID: 12598244 DOI: 10.1213/01.ane.0000047209.18191.9e] [Citation(s) in RCA: 6] [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: 11/05/2022]
Abstract
UNLABELLED Extensive clinical experience and many studies support the use of i.v. patient-controlled analgesia (i.v. PCA) and regional anesthesia techniques for the treatment of postoperative pain in children. In contrast, little has been reported about the ability of children to use patient-controlled epidural analgesia (PCEA) or about the efficacy of this technique. We report a descriptive analysis of prospectively recorded data in 128 children (132 procedures) in whom PCEA was used for acute postoperative pain control. Satisfactory analgesia was obtained in 119 patients (90.1%) for up to 103 h with no episodes of desaturation and without clinical evidence of toxicity or serious adverse effects. Analgesia was satisfactory with the initial settings in 89 patients; in 38 others, this was achieved with changes in PCEA settings or solution. Five patients were switched to i.v. PCA because of inadequate analgesia. Eight patients with satisfactory analgesia were converted to i.v. PCA because of adverse effects. Children as young as 5 yr had the cognitive ability to understand and the willingness to use PCEA, consistent with reported use of i.v. PCA. Careful attention should be paid to the total hourly local anesthetic dose to avoid exceeding the recommended limits. Our prospectively collected data demonstrate that PCEA provides satisfactory analgesia with a small incidence of adverse side effects in children and should be considered along with other strategies in pediatric postoperative pain management. IMPLICATIONS A descriptive analysis of prospectively recorded data in 132 children receiving patient-controlled epidural analgesia for postoperative pain relief demonstrates satisfactory analgesia without serious toxicity or side effects in children as young as 5 yr. This modality should be considered as another strategy in pediatric postoperative pain management.
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MESH Headings
- Adolescent
- Analgesia, Epidural/adverse effects
- Analgesia, Epidural/psychology
- Analgesia, Patient-Controlled/adverse effects
- Analgesia, Patient-Controlled/psychology
- Analgesics, Opioid/administration & dosage
- Analgesics, Opioid/therapeutic use
- Anesthetics, Local/administration & dosage
- Anesthetics, Local/therapeutic use
- Bupivacaine/administration & dosage
- Bupivacaine/therapeutic use
- Child
- Child, Preschool
- Female
- Fentanyl/administration & dosage
- Fentanyl/therapeutic use
- Humans
- Male
- Pain Measurement/drug effects
- Pain, Postoperative/drug therapy
- Prospective Studies
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Affiliation(s)
- William J Greeley
- Departments of *Anesthesiology, †Nursing, and ‡Pediatrics, Children's Memorial Hospital at Northwestern University Medical School, Chicago, Illinois
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Abstract
Anesthesiologists always undertake the challenge of keeping themselves informed about advances in medical knowledge aggressively; however, they have not been particularly active in the areas of patient education and advocacy. Malignant hyperthermia syndrome is a unique condition that anesthesiologists as clinicians understand well--in most cases, better than other specialists. They are positioned best to inform patients initially about the significance of malignant hyperthermia syndrome susceptibility and to provide an ongoing resource for counseling. The physician-patient relationship, according to the American Society of Anesthesiologists' Guidelines for the Ethical Practice of Anesthesiology, "involves special obligations for the physician that include placing the patient's interest foremost, faithfully caring for the patient, and being truthful." The care, counseling, and support that anesthesiologists bring to the patient susceptible to malignant hyperthermia syndrome truly fulfills this relationship.
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Affiliation(s)
- S C Hall
- Department of Pediatric Anesthesia, Children's Memorial Hospital, Chicago, Illinois, USA
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Abstract
Background
Recent studies have determined that an initial rectal acetaminophen dose of approximately 40 mg/kg is needed in children to achieve target antipyretic serum concentrations. The timing and amount of subsequent doses after a 40-mg/kg dose has not been clarified for this route of administration. Based on the authors' previous pharmacokinetic data, they examined whether a 40-mg/kg loading dose followed by 20-mg/kg doses at 6-h intervals maintain serum concentrations within the target range of 10-20 microg/ml, without evidence of accumulation.
Methods
Children (n = 16) received rectal acetaminophen (40 mg/kg) and up to three additional doses of 20 mg/kg at 6-h intervals. Venous blood samples were taken every 30 min for 4 h, then every 60 min for 4 h, and every 4 h for 16 h. The authors assessed whether their published pharmacokinetic parameters predicted the acetaminophen concentrations in the present study. They also assessed their dosing regimen by determining the fraction of time each individual maintained the target concentration.
Results
All patients received the initial loading dose; 10 of 16 patients received three subsequent doses. Serum concentrations with the initial dose were in the target range 38 +/- 25% of the time. With subsequent dosing, the target range was maintained 60 +/- 29% of the time. The highest serum concentration with initial or subsequent dosing was 38.6 microg/ml. Pharmacokinetic parameters from the earlier study predicted the serum concentrations observed for both initial and subsequent doses.
Conclusions
A rectal acetaminophen loading dose of 40 mg/kg followed by 20-mg/kg doses every 6 h results in serum concentrations centered at the target range of 10-20 microg/ml. There was large interindividual variability in pharmacokinetic characteristics. There was no evidence of accumulation during the 24-h sampling period.
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Affiliation(s)
- P K Birmingham
- Northwestern University at Children's Memorial Hospital, Chicago, Illinois 60614-3394, USA.
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Affiliation(s)
- G W Stevenson
- Department of Anesthesiology, Children's Memorial Hospital, Northwestern University Medical School, Chicago, IL 60614, USA.
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Abstract
The effects of temperature and concentration on leuprolide degradation in dimethyl sulfoxide (DMSO) were explored. Leuprolide degradation products were analyzed by reverse phase high-performance liquid chromatography (RP-HPLC), size exclusion chromatography (SEC) and structurally characterized by mass spectrometry. Leuprolide solution stability in DMSO was characterized at 50, 100, 200, 400 mg/ml at 37-80 degrees C for 2 months to 3 years. Leuprolide degradation products were identified by mass spectrometry and could generally be attributed to isomerization, hydrolysis, oxidation, or aggregation. The hydrolytic degradation products consisted primarily of backbone cleavage C-terminal to Trp(3), Ser(4), Tyr(5), Leu(6) and Leu(7), and oxidation of Trp(3) and beta-elimination of Ser(4) were identified. Leuprolide degradation at 50 degrees C, 65 degrees C and 80 degrees C proceeded in an exponential fashion (E(a)=22. 6+/-1.2 kcal/mol); however, leuprolide degradation plateau'd after approximately 6 months at 37 degrees C. Upon closer examination, degradation product peak areas were seen to vary with temperature. For example, aggregation products did not increase with time at 37 degrees C, but aggregation peak intensities increased sharply with time at 80 degrees C. Increasing the temperature also increased the proportion of leuprolide degrading via isomerization/hydrolytic pathways, and decreased the proportion degrading via oxidation. These variations suggested that solvent dielectric, free H(+) in an aprotic solvent, oxygen solubility, impurities and residual moisture may play a role. Leuprolide solubilized in DMSO yields adequate stabililty for a 1 year implantable osmotic delivery system, where use of a dry aprotic solvent results in conditions similar to solid state stability.
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Affiliation(s)
- C L Stevenson
- Biopharmaceutical R & D, ALZA Corporation, 950 Page Mill Road, Palo Alto, CA 94303, USA.
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Stevenson GW, Horn B, Tobin M, Chen EH, Sautel M, Hall SC, Coté CJ. Pressure-Limited Ventilation of Infants with Low-Compliance Lungs: The Efficacy of an Adult Circle System Versus Two Free-Standing Intensive Care Unit Ventilator Systems Using an In Vitro Model. Anesth Analg 1999. [DOI: 10.1213/00000539-199909000-00017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Stevenson GW, Horn B, Tobin M, Chen EH, Sautel M, Hall SC, Coté CJ. Pressure-limited ventilation of infants with low-compliance lungs: the efficacy of an adult circle system versus two free-standing intensive care unit ventilator systems using an in vitro model. Anesth Analg 1999; 89:638-41. [PMID: 10475294 DOI: 10.1097/00000539-199909000-00017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 11/26/2022]
Abstract
UNLABELLED We compared the efficacy of a Drager Narkomed GS (North American Drager, Telford, PA) equipped with an adult circle system with two free-standing infant ventilator systems (Servo 300; Siemens Medical Systems, Danvers, MA and Babylog 8000; North American Drager) to deliver minute ventilation (VE) using pressure-limited ventilation to a test lung set to low compliance. To simulate a wide variety of potential patterns of ventilation, VE was measured at peak inspiratory pressures (PIP) of 20, 30, 40, and 50 cm H2O and at respiratory rates (RR) of 20, 30, 40, and 50 breaths/min. Each measurement was made three times; the average was used for data analysis using the multiple regression technique. Delivered V(E) was positively correlated with both PIP (P = 0.001) and RR (P = 0.001). Only minimal differences in VE were observed between the circle and the two free-standing systems. At lower RR and PIP, the Babylog 8000 system delivered slightly higher VE than the circle system, whereas at higher RR and PIP, the Babylog 8000 delivered slightly lower VE than the circle system; these differences in VE were not statistically significant (P = 0.45). The Servo 300 delivered slightly higher VE than the circle system in all test conditions, but these differences were not statistically significant (P = 0.09). None of the differences in delivered VE between the Servo 300 and the circle system are of clinical importance. IMPLICATIONS Our laboratory investigation suggests that pressure-limited ventilation delivered by a standard adult circle system compares favorably with that of freestanding infant ventilators used in pressure-limited mode. Changing from an adult circle system to a free-standing pressure-limited ventilator may not substantially improve ventilation of a low-compliance infant lung; the efficacy of such a practice should be investigated.
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Affiliation(s)
- G W Stevenson
- Department of Anesthesiology, Children's Memorial Hospital, Chicago, Illinois 60614, USA
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Hall SC, Tan MM, Leonard JJ, Stevenson CL. Characterization and comparison of leuprolide degradation profiles in water and dimethyl sulfoxide. J Pept Res 1999; 53:432-41. [PMID: 10406221 DOI: 10.1034/j.1399-3011.1999.00069.x] [Citation(s) in RCA: 21] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The effect of solvent on the rate of leuprolide degradation and on the structure of the degradation products was explored. Leuprolide solutions (370 mg/mL) were prepared in water and dimethyl sulfoxide (DMSO) for delivery in DUROS osmotic implants. Both solvent systems demonstrated better than 90% stability after 1 year at 37 degrees C, where the DMSO formulation afforded better stability than the aqueous formulation and was used in subsequent clinical trials. The rate of leuprolide degradation in DMSO was also observed to accelerate with increasing moisture content, indicating that the aprotic solvent minimized chemical degradation. Interestingly, leuprolide degradation products varied with formulation vehicle. The proportions of leuprolide degradation products observed to form in water and DMSO at 37 degrees C were hydrolysis > aggregation > isomerization > oxidation and aggregation > oxidation > hydrolysis > isomerization, respectively. Specifically, more N-terminal hydrolysis and acetylation were observed under aqueous conditions, and increased Trp oxidation and Ser beta-elimination were seen under non-aqueous conditions. Furthermore, the major chemical degradation pathway changed with temperature in the DMSO formulation (decreasing oxidation with increasing temperature), but not in the aqueous formulation.
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Affiliation(s)
- S C Hall
- Biopharmaceutical R&D, Alza Corporation, Palo Alto, CA 94303, USA
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Stevenson GW, Tobin M, Horn B, Chen EH, Hall SC, Coté CJ. An adult system versus a Bain system: comparative ability to deliver minute ventilation to an infant lung model with pressure-limited ventilation. Anesth Analg 1999; 88:527-30. [PMID: 10071999 DOI: 10.1097/00000539-199903000-00011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/25/2022]
Abstract
UNLABELLED We compared the efficacy of an adult circle system versus a Bain system to deliver minute ventilation (V(E)) to an infant test lung model using pressure-limited ventilation. To simulate a wide variety of potential infant clinical states, V(E) was measured with two compliances: at peak inspiratory pressures (PIP) of 20, 30, 40, and 50 cm H2O and at respiratory rates (RR) of 20, 30, 40, and 50 breaths/min. Each measurement was made three times, and their average was used for analysis. Data were analyzed using the multiple regression technique. In both normal and low-compliance lung models, V(E) was nearly identical between adult circle and Bain systems (P = 0.67 for normal compliance model, P = 0.89 for low-compliance model). V(E) positively correlated with RR (P < 0.001), PIP (P < 0.001), and lung compliance (P < 0.001). Very high PIP or RR were required to deliver V(E) to the low-compliance lung model. The adult circle system is equivalent to the Bain system in its ability to ventilate an infant test lung over a wide range of RR, PIP, and two compliances during pressure-limited ventilation. V(E) is dependent of PIP, RR, and lung compliance. With low-compliance lungs, both systems require a high PIP. We conclude that both anesthetic systems deliver ventilation over a wide range of respiratory variables during pressure-limited ventilation in infants. IMPLICATIONS We obtained results from this infant test lung study that indicate that either an adult circle breathing system or the Bain system can reliably deliver ventilation over a wide range of respiratory variables during pressure-limited ventilation in infants.
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Affiliation(s)
- G W Stevenson
- Department of Anesthesiology, Children's Memorial Hospital, Northwestern University Medical School, Chicago, Illinois 60614, USA
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Tobin MJ, Stevenson GW, Horn BJ, Chen EH, Hall SC, Coté CJ. A comparison of three modes of ventilation with the use of an adult circle system in an infant lung model. Anesth Analg 1998; 87:766-71. [PMID: 9768767 DOI: 10.1097/00000539-199810000-00005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/25/2022]
Abstract
UNLABELLED We examined the efficiency of an adult circle system with adult bellows to deliver minute ventilation (VE) to an infant test lung model. A Narkomed 2B system (North American Drager, Telford, PA) using three modes of ventilator setup were used: A = time-cycled, volume-controlled using bellows excursion to control delivered volume; B = time-cycled, pressure-controlled using inspiratory pressure limit adjustment to control delivered volume; C = time-cycled, pressure-controlled using the inspiratory flow adjustment to control delivered volume. VE was measured with two compliances (normal and low) and four endotracheal tube (ETT) sizes (2.5-, 3.0-, 3.5-, and 4.0-mm inner diameter). VE was measured at peak inspiratory pressures (PIP) of 20, 30, 40 or 50 cm H2O while respiratory rate (RR) was held constant at 20 breaths/min. VE was measured as RR was set at 20, 30, 40, or 50 breaths/min while target PIP was held constant at 20 cm H2O. Data were analyzed using the multiple regression technique. With the low compliance model, VE was nearly identical regardless of the ventilator setup. With the normal compliance model, minor differences in VE were observed, especially at the highest RR and PIP. VE was dependent on RR, PIP, and lung compliance. Overall, the ventilator setup resulted in minor changes in VE. Very high PIPs were required to deliver VE to the low compliance model. ETT size did not affect VE when lung compliance was low; however, smaller ETT size was a factor when test lung compliance was normal, decreasing delivered VE at higher PIP and RR. We conclude that with a Narkomed 2B adult circle system VE is dependent on PIP, RR, and lung compliance, but not on mode of ventilator setup. IMPLICATIONS The results of this laboratory investigation indicate that when an adult circle system is used during infant anesthesia, the ventilation delivered depends primarily on the respiratory rate, peak inspiratory pressure, and the compliance of the lung being ventilated, rather than on the specific mode of ventilator setup.
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Affiliation(s)
- M J Tobin
- Department of Anesthesiology, Children's Memorial Hospital and Northwestern University Medical School, Chicago, Illinois 60614, USA
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Tobin MJ, Stevenson GW, Horn BJ, Chen EH, Hall SC, Cote CJ. A Comparison of Three Modes of Ventilation with the Use of an Adult Circle System in an Infant Lung Model. Anesth Analg 1998. [DOI: 10.1213/00000539-199810000-00005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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