144
pages
Deutsch
Documents
2008
Le téléchargement nécessite un accès à la bibliothèque YouScribe Tout savoir sur nos offres
144
pages
Deutsch
Documents
2008
Le téléchargement nécessite un accès à la bibliothèque YouScribe Tout savoir sur nos offres
Publié par
Publié le
01 janvier 2008
Nombre de lectures
126
Langue
Deutsch
Poids de l'ouvrage
6 Mo
Publié par
Publié le
01 janvier 2008
Langue
Deutsch
Poids de l'ouvrage
6 Mo
Aus der Abteilung für Immunologie
(Leiterin Prof. Dr. Christine Schütt )
der Medizinischen Fakultät der Ernst-Moritz-Arndt-Universität Greifswald
Thema:
The human antibody response to
experimental colonization with Staphylococcus aureus NCTC8325-4
Inaugural - Dissertation
zur
Erlangung des akademischen
Grades
Doktor der Naturwissenschaften in der Medizin
(Dr. rer. med.)
der
Medizinischen Fakultät
der
Ernst-Moritz-Arndt-Universität Greifswald
vorgelegt von
Nguyen Thi Thu Hoai
geb. am 08.07.1981
in: Hoa Binh, Vietnam
Greifswald, 2008
Dekan: Prof. Dr. rer. nat. Heyo K. Kroemer
1. Gutachter: Prof. Dr. med. Barbara M. Bröker
2. Gutachter: Prof. Dr. Uwe Völker
3. Gutachter: Prof. Alex van Belkum
Ort, Raum: Seminarraum des Friedrich Loeffler Instituts für Medizinische Mikrobiologie
Tag der Disputation:10 Dezember 2008
Eidesstattliche Erklärung
Hiermit erkläre ich, daß ich die vorliegende Dissertation selbständig verfaßt und keine anderen
als die angegebenen Hilfsmittel benutzt habe.
Die Dissertation ist bisher keiner anderen Fakultät vorgelegt worden.
Ich erkläre, daß ich bisher kein Promotionsverfahren erfolglos beendet habe und daß eine
Aberkennung eines bereits erworbenen Doktorgrades nicht vorliegt.
Datum Unterschrift
Nguyen Thi Thu Hoai
Contents
Contents ................................................................................................................................ A1
List of Tables .......................................................................................................................... A3
List of Figures ......................................................................................................................... A4
Acknowledgments ................................................................................................................. A6
List of Abbreviations .............................................................................................................. A8
Summary ............................................................................................................................. A10
Chapter 1 INTRODUCTION ............................................................................................1
1.1 Staphylococcus aureus‐human interaction in colonization and infection ............................ 1
1.1.1 S. aureus genetics and virulence factors ......................................................................................2
1.1.2 Correlation of S. aureus nasal carriage and risk of infection ........................................................9
1.1.3 Interactions between human immune system and S. aureus‐ Perspective of anti‐
staphylococcal vaccines ..................................................................................................................... 13
1.2 Immune proteomics ......................................................................................................... 21
Aims of the study ................................................................................................................... 23
Chapter 2 MATERIALS AND METHODS....................................................................24
2.1 Materials .......................................................................................................................... 24
2.1.1 S. aureus strains ........................................................................................................................ 24
2.1.2 Human sera ............................................................................................................................... 24
2.1.3 Chemicals ... 26
2.1.4 Media, buffers and solutions ..................................................................................................... 28
2.1.5 Equipments 30
2.1.6 Softwares .... 31
2.2 Methods .......................................................................................................................... 31
2.2.1 Protein isolation 31
2.2.2 Two‐dimensional polyacrylamide gel electrophoresis (2‐D PAGE) ........................................... 33
2.2.3 Visualization of proteins on gels ............................................................................................... 34
2.2.4 Identification of protein by MALDI‐TOF‐MS .............................................................................. 36
2.2.5 Immunoblotting 37
2.2.6 Evaluation of gels and blots ...................................................................................................... 38
Chapter 3 RESULTS .......................................................................................................41
3.1 Optimization of the experimental procedures .................................................................. 41
3.1.1 Two‐dimensional immunoblots (2‐D IBs) .................................................................................. 41
3.1.2 Optimization of data analysis .................................................................................................... 46
3.2 Reference maps of S. aureus 8325‐4 extracellular proteins ............................................... 49
3.3 Comprehensive immune proteome of S. aureus 8325‐4 extracellular proteins ................. 54
3.4 Inter‐individual variability of baseline IgG binding to S. aureus Ags .................................. 60
3.5 Differences between carriers and noncarriers in baseline IgG binding to S. aureus Ags ..... 65
3.6 Impact of experimental colonization on the Ab response ................................................. 66
A1
Chapter 4 DISCUSSION .................................................................................................69
4.1 The immune proteome approach for the analysis of the humoral immune response
against identification of S. aureus .......................................................................................... 69
4.2 The extracellular proteome of S. aureus 8325‐4................................................................ 71
4.3 IgG binding to S. aureus extracellular proteins ................................................................. 73
4.4 Factors determining the immune reactivity of S. aureus extracellular proteins ................. 75
4.5 Anti‐S. aureus Ab profiles are heterogeneous among individuals ..................................... 76
4.6 The core and the variable immune proteome of S. aureus ................................................ 77
4.7 Differences between carriers and noncarriers in baseline IgG binding to S. aureus ........... 78
4.8 Impact of experimental colonization with S. aureus on the serum IgG response .............. 80
Chapter 5 CONCLUSIONS AND PERSPECTIVES......................................................81
REFERENCES ........................................................................................................................... 84
APPENDIX