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Westrip CAE, Paul F, Al-Murshedi F, Qaitoon H, Cham B, Fletcher SC, Hendrix E, Boora U, Ng AYJ, Bonnard C, Najafi M, Alawbathani S, Lambert I, Fox G, Venkatesh B, Bertoli-Avella A, Tan ES, Al-Maawali A, Reversade B, Coleman ML. Inactivation of DRG1, encoding a translation factor GTPase, causes a recessive neurodevelopmental disorder. Genet Med 2023; 25:100893. [PMID: 37179472 DOI: 10.1016/j.gim.2023.100893] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 05/05/2023] [Accepted: 05/07/2023] [Indexed: 05/15/2023] Open
Abstract
PURPOSE Developmentally regulated Guanosine-5'-triphosphate-binding protein 1 (DRG1) is a highly conserved member of a class of GTPases implicated in translation. Although the expression of mammalian DRG1 is elevated in the central nervous system during development, and its function has been implicated in fundamental cellular processes, no pathogenic germline variants have yet been identified. Here, we characterize the clinical and biochemical consequences of DRG1 variants. METHODS We collate clinical information of 4 individuals with germline DRG1 variants and use in silico, in vitro, and cell-based studies to study the pathogenicity of these alleles. RESULTS We identified private germline DRG1 variants, including 3 stop-gained p.Gly54∗, p.Arg140∗, p.Lys263∗, and a p.Asn248Phe missense variant. These alleles are recessively inherited in 4 affected individuals from 3 distinct families and cause a neurodevelopmental disorder with global developmental delay, primary microcephaly, short stature, and craniofacial anomalies. We show that these loss-of-function variants (1) severely disrupt DRG1 messenger RNA/protein stability in patient-derived fibroblasts, (2) impair its GTPase activity, and (3) compromise its binding to partner protein ZC3H15. Consistent with the importance of DRG1 in humans, targeted inactivation of mouse Drg1 resulted in preweaning lethality. CONCLUSION Our work defines a new Mendelian disorder of DRG1 deficiency. This study highlights DRG1's importance for normal mammalian development and underscores the significance of translation factor GTPases in human physiology and homeostasis.
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Affiliation(s)
- Christian A E Westrip
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Franziska Paul
- Institute of Molecular and Cell Biology (IMCB), A∗STAR, Singapore
| | - Fathiya Al-Murshedi
- Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Oman; Genetic and Developmental Medicine Clinic, Sultan Qaboos University Hospital, Muscat, Oman
| | - Hashim Qaitoon
- Department of Pediatrics, Sultan Qaboos Hospital, Ministry of Health, Salalah, Oman
| | - Breana Cham
- Genetics Service, Department of Paediatrics, KK Women's & Children's Hospital, Singapore
| | - Sally C Fletcher
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Eline Hendrix
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Uncaar Boora
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Alvin Yu Jin Ng
- Molecular Diagnosis Centre (MDC), National University Hospital, Singapore
| | - Carine Bonnard
- A∗STAR Skin Research Labs (A∗SRL), Agency for Science, Technology and Research (A∗STAR), Republic of Singapore
| | | | | | - Imelda Lambert
- Dept of Paediatrics, King Hamad University Hospital, RCSI Medical University, Busaiteen, Bahrain
| | - Gabriel Fox
- Dept of Paediatrics, King Hamad University Hospital, RCSI Medical University, Busaiteen, Bahrain
| | | | | | - Ee Shien Tan
- Genetics Service, Department of Paediatrics, KK Women's & Children's Hospital, Singapore
| | - Almundher Al-Maawali
- Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Oman; Genetic and Developmental Medicine Clinic, Sultan Qaboos University Hospital, Muscat, Oman.
| | - Bruno Reversade
- Institute of Molecular and Cell Biology (IMCB), A∗STAR, Singapore; Laboratory of Human Genetics & Therapeutics, Genome Institute of Singapore (GIS), A∗STAR, Singapore; Smart-Health Initiative, BESE, KAUST, Saudi Arabia.
| | - Mathew L Coleman
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom.
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2
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Fletcher SC, Hall C, Kennedy TJ, Pajusalu S, Wojcik MH, Boora U, Li C, Oja KT, Hendrix E, Westrip CA, Andrijes R, Piasecka SK, Singh M, El-Asrag ME, Ptasinska A, Tillmann V, Higgs MR, Carere DA, Beggs AD, Pappas J, Rabin R, Smerdon SJ, Stewart GS, Õunap K, Coleman ML. Impaired protein hydroxylase activity causes replication stress and developmental abnormalities in humans. J Clin Invest 2023; 133:e152784. [PMID: 36795492 PMCID: PMC10065073 DOI: 10.1172/jci152784] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 02/14/2023] [Indexed: 02/17/2023] Open
Abstract
Although protein hydroxylation is a relatively poorly characterized posttranslational modification, it has received significant recent attention following seminal work uncovering its role in oxygen sensing and hypoxia biology. Although the fundamental importance of protein hydroxylases in biology is becoming clear, the biochemical targets and cellular functions often remain enigmatic. JMJD5 is a "JmjC-only" protein hydroxylase that is essential for murine embryonic development and viability. However, no germline variants in JmjC-only hydroxylases, including JMJD5, have yet been described that are associated with any human pathology. Here we demonstrate that biallelic germline JMJD5 pathogenic variants are deleterious to JMJD5 mRNA splicing, protein stability, and hydroxylase activity, resulting in a human developmental disorder characterized by severe failure to thrive, intellectual disability, and facial dysmorphism. We show that the underlying cellular phenotype is associated with increased DNA replication stress and that this is critically dependent on the protein hydroxylase activity of JMJD5. This work contributes to our growing understanding of the role and importance of protein hydroxylases in human development and disease.
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Affiliation(s)
- Sally C. Fletcher
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Charlotte Hall
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Tristan J. Kennedy
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Sander Pajusalu
- Department of Clinical Genetics, Genetics and Personalized Medicine Clinic, Tartu University Hospital, Tartu, Estonia
- Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - Monica H. Wojcik
- Center for Mendelian Genomics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Divisions of Newborn Medicine and Genetics and Genomics, Department of Pediatrics, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Uncaar Boora
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Chan Li
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Kaisa Teele Oja
- Department of Clinical Genetics, Genetics and Personalized Medicine Clinic, Tartu University Hospital, Tartu, Estonia
- Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - Eline Hendrix
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Christian A.E. Westrip
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Regina Andrijes
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Sonia K. Piasecka
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Mansi Singh
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Mohammed E. El-Asrag
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
- Faculty of Science, Benha University, Benha, Egypt
| | - Anetta Ptasinska
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Vallo Tillmann
- Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
- Children’s Clinic, Tartu University Hospital, Tartu, Estonia
| | - Martin R. Higgs
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | | | - Andrew D. Beggs
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - John Pappas
- Clinical Genetic Services, Department of Pediatrics, NYU Langone Medical Center, New York, New York, USA
| | - Rachel Rabin
- Clinical Genetic Services, Department of Pediatrics, NYU Langone Medical Center, New York, New York, USA
| | - Stephen J. Smerdon
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Grant S. Stewart
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Katrin Õunap
- Department of Clinical Genetics, Genetics and Personalized Medicine Clinic, Tartu University Hospital, Tartu, Estonia
- Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - Mathew L. Coleman
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
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3
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Ross J, Kleine S, Smith C, DeBolt R, Weisent J, Seddighi R, Hendrix E. Evaluation of the post-operative analgesic effects of grapiprant compared with carprofen in dogs undergoing elective ovariohysterectomy. Vet Anaesth Analg 2023. [DOI: 10.1016/j.vaa.2022.09.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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4
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Nowak R, Tumber A, Hendrix E, Ansari MS, Sabatino M, Antonini L, Andrijes R, Salah E, Mautone N, Pellegrini FR, Simelis K, Kawamura A, Johansson C, Passeri D, Pellicciari R, Ciogli A, Del Bufalo D, Ragno R, Coleman ML, Trisciuoglio D, Mai A, Oppermann U, Schofield CJ, Rotili D. First-in-Class Inhibitors of the Ribosomal Oxygenase MINA53. J Med Chem 2021; 64:17031-17050. [PMID: 34843649 PMCID: PMC8667043 DOI: 10.1021/acs.jmedchem.1c00605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Indexed: 01/05/2023]
Abstract
MINA53 is a JmjC domain 2-oxoglutarate-dependent oxygenase that catalyzes ribosomal hydroxylation and is a target of the oncogenic transcription factor c-MYC. Despite its anticancer target potential, no small-molecule MINA53 inhibitors are reported. Using ribosomal substrate fragments, we developed mass spectrometry assays for MINA53 and the related oxygenase NO66. These assays enabled the identification of 2-(aryl)alkylthio-3,4-dihydro-4-oxoypyrimidine-5-carboxylic acids as potent MINA53 inhibitors, with selectivity over NO66 and other JmjC oxygenases. Crystallographic studies with the JmjC demethylase KDM5B revealed active site binding but without direct metal chelation; however, molecular modeling investigations indicated that the inhibitors bind to MINA53 by directly interacting with the iron cofactor. The MINA53 inhibitors manifest evidence for target engagement and selectivity for MINA53 over KDM4-6. The MINA53 inhibitors show antiproliferative activity with solid cancer lines and sensitize cancer cells to conventional chemotherapy, suggesting that further work investigating their potential in combination therapies is warranted.
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Affiliation(s)
- Radosław
P. Nowak
- Botnar
Research Centre, Nuffield Orthopaedic Centre, University of Oxford, Headington OX3 7LD, U.K.
| | - Anthony Tumber
- Botnar
Research Centre, Nuffield Orthopaedic Centre, University of Oxford, Headington OX3 7LD, U.K.
- Chemistry
Research Laboratory, Department of Chemistry and the Ineos Oxford
Institute for Antimicrobial Research, 12, Mansfield Road, University of Oxford, Oxford OX1 3TA, U.K.
| | - Eline Hendrix
- Institute
of Cancer and Genomic Sciences, University
of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
| | - Mohammad Salik
Zeya Ansari
- Institute
of Molecular Biology and Pathology (IMBP), National Research Council
(CNR) c/o Department of Biology and Biotechnology “Charles
Darwin” Sapienza University of Rome, Via degli Apuli 4, Rome 00185, Italy
| | - Manuela Sabatino
- Rome
Center for Molecular Design, Department of Chemistry and Technology
of Drugs, ″Sapienza″ University
of Rome, Piazzale Aldo
Moro 5, Rome 00185, Italy
| | - Lorenzo Antonini
- Rome
Center for Molecular Design, Department of Chemistry and Technology
of Drugs, ″Sapienza″ University
of Rome, Piazzale Aldo
Moro 5, Rome 00185, Italy
| | - Regina Andrijes
- Institute
of Cancer and Genomic Sciences, University
of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
| | - Eidarus Salah
- Chemistry
Research Laboratory, Department of Chemistry and the Ineos Oxford
Institute for Antimicrobial Research, 12, Mansfield Road, University of Oxford, Oxford OX1 3TA, U.K.
| | - Nicola Mautone
- Department
of Chemistry and Technology of Drugs, ″Sapienza″
University of Rome, Piazzale
Aldo Moro 5, Rome 00185, Italy
| | - Francesca Romana Pellegrini
- Institute
of Molecular Biology and Pathology (IMBP), National Research Council
(CNR) c/o Department of Biology and Biotechnology “Charles
Darwin” Sapienza University of Rome, Via degli Apuli 4, Rome 00185, Italy
| | - Klemensas Simelis
- Chemistry
Research Laboratory, Department of Chemistry and the Ineos Oxford
Institute for Antimicrobial Research, 12, Mansfield Road, University of Oxford, Oxford OX1 3TA, U.K.
| | - Akane Kawamura
- Chemistry
- School of Natural and Environmental Sciences, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K.
| | - Catrine Johansson
- Botnar
Research Centre, Nuffield Orthopaedic Centre, University of Oxford, Headington OX3 7LD, U.K.
- Chemistry
Research Laboratory, Department of Chemistry and the Ineos Oxford
Institute for Antimicrobial Research, 12, Mansfield Road, University of Oxford, Oxford OX1 3TA, U.K.
| | - Daniela Passeri
- TES
Pharma S.r.l. Via P. Togliatti 20, Corciano, Perugia 06073, Italy
| | | | - Alessia Ciogli
- Department
of Chemistry and Technology of Drugs, ″Sapienza″
University of Rome, Piazzale
Aldo Moro 5, Rome 00185, Italy
| | - Donatella Del Bufalo
- Preclinical
Models and New Therapeutic Agents Unit, IRCCS-Regina Elena National Cancer Institute, Via Elio Chianesi 53, Rome 00144, Italy
| | - Rino Ragno
- Rome
Center for Molecular Design, Department of Chemistry and Technology
of Drugs, ″Sapienza″ University
of Rome, Piazzale Aldo
Moro 5, Rome 00185, Italy
| | - Mathew L. Coleman
- Institute
of Cancer and Genomic Sciences, University
of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
| | - Daniela Trisciuoglio
- Institute
of Molecular Biology and Pathology (IMBP), National Research Council
(CNR) c/o Department of Biology and Biotechnology “Charles
Darwin” Sapienza University of Rome, Via degli Apuli 4, Rome 00185, Italy
| | - Antonello Mai
- Department
of Chemistry and Technology of Drugs, ″Sapienza″
University of Rome, Piazzale
Aldo Moro 5, Rome 00185, Italy
| | - Udo Oppermann
- Botnar
Research Centre, Nuffield Orthopaedic Centre, University of Oxford, Headington OX3 7LD, U.K.
| | - Christopher J. Schofield
- Chemistry
Research Laboratory, Department of Chemistry and the Ineos Oxford
Institute for Antimicrobial Research, 12, Mansfield Road, University of Oxford, Oxford OX1 3TA, U.K.
| | - Dante Rotili
- Department
of Chemistry and Technology of Drugs, ″Sapienza″
University of Rome, Piazzale
Aldo Moro 5, Rome 00185, Italy
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5
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Bundred JR, Hendrix E, Coleman ML. The emerging roles of ribosomal histidyl hydroxylases in cell biology, physiology and disease. Cell Mol Life Sci 2018; 75:4093-4105. [PMID: 30151692 PMCID: PMC6182338 DOI: 10.1007/s00018-018-2903-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/06/2018] [Accepted: 08/08/2018] [Indexed: 12/27/2022]
Abstract
Hydroxylation is a novel protein modification catalyzed by a family of oxygenases that depend on fundamental nutrients and metabolites for activity. Protein hydroxylases have been implicated in a variety of key cellular processes that play important roles in both normal homeostasis and pathogenesis. Here, in this review, we summarize the current literature on a highly conserved sub-family of oxygenases that catalyze protein histidyl hydroxylation. We discuss the evidence supporting the biochemical assignment of these emerging enzymes as ribosomal protein hydroxylases, and provide an overview of their role in immunology, bone development, and cancer.
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Affiliation(s)
- James R Bundred
- Tumour Oxygenase Group, Institute of Cancer and Genomic Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Eline Hendrix
- Tumour Oxygenase Group, Institute of Cancer and Genomic Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Mathew L Coleman
- Tumour Oxygenase Group, Institute of Cancer and Genomic Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
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Abstract
While isolating and characterizing cervical mucin glycoproteins, oviductin (Muc9) was identified in the rabbit endocervix. Following tissue homogenization, endocervical proteins were fractionated by exclusion chromatography (Sepharose CL-4B). High molecular weight components of the void volume were resolved by density gradient centrifugation using cesium bromide and dissociative conditions (4 M guanidinium chloride). High density fractions (rho = 1.40 - 1.56 g/ml) were deglycosylated with anhydrous trifluoromethane sulfonic acid and sent to Harvard Microchemistry where in situ digestion and tryptic peptide separation were performed. Out of an HPLC map, microsequence (KLIMGFPTYGR) from peak 51 was 100% identical to mouse oviductin, and microsequence (KSTGHNFPLP) from peak 70 was 90% identical to hamster oviductin. Temporal expression of oviductin transcripts (2.4-kilobase) was negligible during the first three months of postnatal cervical differentiation. Transcripts were minimally detectable in the cervices of 4-month-old juveniles. Strong expression in the endocervices of adults was eliminated by ovariectomy and restored by estrogen treatment. The presence of oviductin in the rabbit endocervix indicates this glycoprotein may have multiple functions, and it can no longer be considered oviduct-specific.
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Affiliation(s)
- E Hendrix
- Department of Cell Biology & Biochemistry, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, USA
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7
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Abstract
Prolactin enhances progesterone-dependent transcription of the rabbit uteroglobin gene. RUSH transcription factors are implicated in the signal transduction pathway. The RUSH acronym identifies key features of these nuclear phosphoproteins, that is, RING-finger motif, binds the uteroglobin promoter, structurally related to the SWI/SNF family of transcription factors, and helicase-like. Cloned by recognition site screening, RUSH proteins bind to an 85-bp region (-170/-85) of the uteroglobin promoter that was subsequently identified as a novel prolactin-responsive region by promoter deletion analysis. Gel shift and linker-scanning assays further reduced the RUSH target site to -160/-110. A hexameric core of MCWTDK was identified as the RUSH-specific DNA-binding site (-126/-121) by CASTing. This site overlaps authentic HNF3 beta and OCT-1 binding sites. A unique Type IV P-type ATPase that is embedded in the inner nuclear membrane binds the RING domain of RUSH. The conformationally flexible loop portion of this RING-finger binding protein (RFBP) extends into the nucleoplasm to contact euchromatin. The physical association of RFBP with transcriptionally active chromatin supports the speculation that RFBP targets RUSH transcription factors to the active uteroglobin promoter.
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Affiliation(s)
- B S Chilton
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, 3601 4th Street, Lubbock, TX 79430, USA.
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8
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Campbell W, Hendrix E, Schwalbe R, Fattom A, Edelman R. Head-injured patients who are nasal carriers of Staphylococcus aureus are at high risk for Staphylococcus aureus pneumonia. Crit Care Med 1999; 27:798-801. [PMID: 10321672 DOI: 10.1097/00003246-199904000-00039] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [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
OBJECTIVE To determine if head-injured patients with premorbid nasal colonization with Staphylococcus aureus are at increased risk for S. aureus infection. DESIGN Patients admitted over a 2-yr period were enrolled if they met the following criteria: Injury Severity Score > or = 9, intensive care unit (ICU) admission, hospitalization in another hospital < 24 hrs, no recent use of antibiotics. SETTING Acute care trauma facility. PATIENTS Any patient sustaining acute, blunt, or penetrating injury and meeting the enrollement criteria were eligible. INTERVENTIONS Swab cultures of both internal nares were performed within 72 hrs of readmission and cultured for S. Aureus. Patients were prospectively monitored for S. Aureus infections until discharge. MEASUREMENTS AND MAIN RESULTS Admission nasal cultures were positive (NC+) for S. aureus in 144 of the 776 patients cultured. Forty of the 144 NC+ patients had isolated head (37) or high cervical spine (3) injury, and 11 of that group (27.5%) developed S. aureus infections. The remaining 104 patients positive for S. aureus on admission had no head injury (74) or head combined with torso and extremity injuries (30). S. aureus infection was diagnosed in 11 of the 104 patients (10.6%). The difference in incidence of infections is significant (p <.01), as is the difference in incidence of pneumonia (20% vs. 3.8%, respectively [p <.01]). Organisms causing pneumonia were often the same organisms isolated from the nares on admission. CONCLUSIONS Nasal colonization with S. aureus at the time of severe head injury increases the risk of S. aureus pneumonia during hospitalization. Prophylactic measures against S. aureus pneumonia may help reduce the length and cost of hospitalization.
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Affiliation(s)
- W Campbell
- R. Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, USA
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9
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Abstract
In Delaware, asthma affects almost 14,000 children. The American Lung Association of Delaware and the University of Delaware surveyed school nurses to identify the needs of children with asthma and the services and accommodations available for these children. Researchers developed a survey instrument that was mailed to all Delaware schools (N = 324). The response rate was 38.6% (n = 125). According to respondents, a variety of protocols were in place regarding the administration of asthma medications. Respondents also reported that several measures had been taken to modify the school environment to improve air quality and reduce asthma triggers. Most respondents (77%) indicated they did not have asthma education programs in their schools. Findings from this study sparked development of a multidisciplinary Delaware Asthma Committee, an Asthma Education Center, and a statewide system for communicating with the parents of children with asthma.
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Affiliation(s)
- L Bucher
- College of Health and Nursing Sciences, University of Delaware, Newark 19716, USA.
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10
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Na'was T, Hawwari A, Hendrix E, Hebden J, Edelman R, Martin M, Campbell W, Naso R, Schwalbe R, Fattom AI. Phenotypic and genotypic characterization of nosocomial Staphylococcus aureus isolates from trauma patients. J Clin Microbiol 1998; 36:414-20. [PMID: 9466751 PMCID: PMC104552 DOI: 10.1128/jcm.36.2.414-420.1998] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/1997] [Accepted: 11/13/1997] [Indexed: 02/06/2023] Open
Abstract
Staphylococcus aureus is a major cause of nosocomial infections. During the period from March 1992 to March 1994, the patients admitted to the intensive care unit of the University of Maryland Shock Trauma Center were monitored for the development of S. aureus infections. Among the 776 patients eligible for the study, 60 (7.7%) patients developed 65 incidents of nosocomial S. aureus infections. Of the clinical isolates, 43.1% possessed a polysaccharide type 5 capsule, 44.6% possessed a type 8 capsule, and the remaining 12.3% had capsules that were not typed by the type 5 or type 8 antibodies. Six antibiogram types were noted among the infection-related isolates, with the majority of the types being resistant only to penicillin and ampicillin. It was noted that the majority of cases of pneumonia were caused by relatively susceptible strains, while resistant strains were isolated from patients with bacteremia and other infections. Only 16 (6.3%) of the isolates were found to be methicillin-resistant S. aureus (MRSA). DNA fingerprinting by pulsed-field gel electrophoresis showed 36 different patterns, with characteristic patterns being found for MRSA strains and the strains with different capsular types. Clonal relationships were established, and the origins of the infection-related isolates in each patient were determined. We conclude that (i) nosocomial infection-related isolates from the shock trauma patients did not belong to a single clone, although the predominance of a methicillin-resistant genotype was noted, (ii) most infection-related S. aureus isolates were relatively susceptible to antibiotics, but a MRSA strain was endemic, and (iii) for practical purposes, the combination of the results of capsular and antibiogram typing can be used as a useful epidemiological marker.
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Affiliation(s)
- T Na'was
- W. W. Karakawa Microbial Pathogenesis Laboratory, NABI, Rockville, Maryland 20852, USA
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11
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Campbell WN, Hendrix E, Cryz S, Cross AS. Immunogenicity of a 24-valent Klebsiella capsular polysaccharide vaccine and an eight-valent Pseudomonas O-polysaccharide conjugate vaccine administered to victims of acute trauma. Clin Infect Dis 1996; 23:179-81. [PMID: 8816151 DOI: 10.1093/clinids/23.1.179] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
We measured the antibody response in 10 victims of acute blunt trauma and penetrating trauma who were immunized against Klebsiella pneumoniae and Pseudomonas species within 72 hours of injury. The two vaccines, which were previously shown to be safe and immunogenic in uninjured humans, were a 24-valent K. pneumoniae capsular polysaccharide vaccine and an eight-valent Pseudomonas O-polysaccharide-toxin A conjugate vaccine. The patients were between 18 and 44 years of age, had Injury Severity Scores that ranged between 9 and 34, and did not have chronic infections or malignancies. On days 14 and 28 after immunization, all patients had a response of greater than fourfold to at least six of the nine Pseudomonas vaccine antigens. Half of the patients responded to eight of the nine antigens. Nine patients responded to at least 18 of 24 Klebsiella antigens, and seven patients responded to 22 of the 24 antigens. No important side effects were attributed to the vaccines. The results of this preliminary study indicate that active immunization against potential pathogens is possible in victims of acute trauma.
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Affiliation(s)
- W N Campbell
- Department of Medicine, University of Maryland School of Medicine, Baltimore, USA
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12
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Caplan ES, Preas MA, Kerns T, Soderstrom C, Bosse M, Bansal J, Constantine NT, Hendrix E, Caplan M. Seroprevalence of human immunodeficiency virus, hepatitis B virus, hepatitis C virus, and rapid plasma reagin in a trauma population. J Trauma 1995; 39:533-7; discussion 537-8. [PMID: 7473920 DOI: 10.1097/00005373-199509000-00022] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We evaluated the presence of human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV), and rapid plasma reagin (RPR) among patients admitted to our trauma unit from April 15 to June 30, 1993. Of 984 patients tested, we found 255 (26%) had evidence of exposure to one or more of these agents: HIV, 4%; HBV, 20%; HCV, 14%; and RPR, 1%. Thirty-eight percent of patients had more than one positive serology, 75% of the HIV patients, 49% of the HBV patients, and 66% of the HCV patients. There was no difference between penetrating and nonpenetrating trauma with respect to any of the viruses. The risk factors for HIV-positive patients were non-White race, positive drug screen, positive alcohol screen, and city resident. Risk factors for HBV patients were non-White race, positive drug screen, and city resident. Risk factors for HBC patients were male sex, non-White race, positive alcohol screen, positive drug screen, and city resident. The risk of blood-borne infections in this group of patients is substantial.
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Affiliation(s)
- E S Caplan
- Department of Infectious Diseases, R Adams Cowley Shock Trauma Center, School of Medicine, University of Maryland Medical Center, Baltimore 21201-1595, USA
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Nasrallah SM, Hendrix E. The effect of topical pharyngeal anesthesia on esophageal motility. Am J Gastroenterol 1987; 82:523-5. [PMID: 3578232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A strong gag reflex may be a limiting factor to perform esophageal motility in some patients. Even though local anesthetics could alleviate such a problem, they are not used for fear of interfering with various manometric parameters. In this study, we evaluated the effect of topical pharyngeal local anesthesia on lower esophageal sphincter pressure, amplitude, duration, and velocity of esophageal contractions. We also studied its effects on the patient's tolerance. Esophageal motility was performed before and after topical anesthesia with 20% benzocaine. The baseline tracing and the tracing obtained after topical anesthesia were number coded and separated. They were evaluated blindly as to the pressure in the lower esophageal sphincter, amplitude, duration, and velocity of esophageal contractions. An average of 10 wet swallows was used to determine the above values. There was no significant change in the lower esophageal sphincter pressure or the amplitude of esophageal contractions after benzocaine. Similarly, there was no change in the duration or velocity of peristaltic activity. The patient's tolerance to the tube was unchanged or improved in 12 of 14 patients. Six patients had some difficulty in swallowing, but were able to compensate by sucking on the syringe. Our results indicate that topical pharyngeal anesthesia does not affect the usually measured manometric parameters; and while it may improve the patient's tolerance to the manometric catheter, it interferes with the ability to swallow.
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