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Helicobacter Pylori Therapies, An Issue of Gastroenterology Clinics of North America, E-Book

Helicobacter Pylori Therapies, An Issue of Gastroenterology Clinics of North America, E-Book

Akiko Shiotani

(2015)

Additional Information

Abstract

Helicobacter pylori (H. pylori) infection is a worldwide disease with a significant morbidity and mortality; it is the leading cause of non-ulcer dyspepsia, peptic ulcers and gastric tumors, including low-grade mucosa-associated lymphoid tissue-lymphoma and adenocarcinoma. In addition, it has also been recognized that the interaction between H. pylori and non-steroidal, anti-inflammatory drugs is damaging to the gastroduodenal mucosa. H. pylori treatment still remains a challenge for physicians, since no current first-line therapy is able to cure the infection in all treated patients. This issue will serve to update gastroenterologists on current therapies, evaluation and management of disease progression, and the future of management of H. pylori infection.

Table of Contents

Section Title Page Action Price
Front Cover Cover
Managementof Helicobacterpylori–Related Diseases i
Copyright\r ii
Contributors iii
CONSULTING EDITOR iii
EDITORS iii
AUTHORS iii
Contents vii
Foreword: Helicobacter pylori\r vii
Preface: Helicobacter pylori: New Thoughts and Practices \r vii
Diagnosis of Helicobacter pylori Infection in the Proton Pump Inhibitor Era \r vii
Practical Aspects in Choosing a Helicobacter pylori Therapy \r vii
How to Effectively Use Bismuth Quadruple Therapy: The Good, the Bad, and the Ugly\r vii
Is There a Role for Probiotics in Helicobacter pylori Therapy?\r viii
Molecular Approaches to Identify Helicobacter pylori Antimicrobial Resistance\r viii
When Is Endoscopic Follow-up Appropriate After Helicobacter pylori Eradication Therapy?\r viii
Gastric Cancer Risk in Patients with Helicobacter pylori Infection and Following Its Eradication\r viii
Molecular Pathogenesis of Helicobacter pylori-Related Gastric Cancer\r ix
Helicobacter pylori Eradication to Eliminate Gastric Cancer: The Japanese Strategy\r ix
Treatment Strategy for Gastric Mucosa-Associated Lymphoid Tissue Lymphoma\r ix
Rationale for a Helicobacter pylori Test and Treatment Strategy in Gastroesophageal Reflux Disease\r ix
Screening to Identify and Eradicate Helicobacter pylori Infection in Teenagers in Japan\r x
Current Status and Prospects for a Helicobacter pylori Vaccine\r x
GASTROENTEROLOGY\rCLINICS OF NORTH AMERICA\r xi
FORTHCOMING ISSUES xi
December 2015 xi
March 2016 xi
June 2016 xi
RECENT ISSUES xi
June 2015 xi
March 2015 xi
December 2014 xi
Helicobacter pylori xiii
Helicobacter pylori: New Thoughts and Practices xv
Diagnosis of Helicobacter pylori Infection in the Proton Pump Inhibitor Era 507
Key points 507
INTRODUCTION 507
INVASIVE TESTS 508
Histology 508
Culture 510
Rapid urease test 510
Molecular tests 511
Noninvasive Tests 512
Urea breath test 512
Stool antigen tests 512
SEROLOGY 513
SUMMARY: DIAGNOSIS OF HELICOBACTER PYLORI INFECTION IN THE PROTON PUMP INHIBITORS ERA 514
ACKNOWLEDGMENTS 515
REFERENCES 515
Practical Aspects in Choosing a Helicobacter pylori Therapy 519
Key points 519
INTRODUCTION 520
Why Is Helicobacter pylori Difficult to Treat? 520
CHOICE OF THERAPY 522
FIRST-LINE REGIMENS 524
Nonbismuth Quadruple Therapies 525
Sequential therapy 525
Concomitant therapy 526
Hybrid (sequential-concomitant) therapy 526
Bismuth Quadruple Therapy 527
RESCUE THERAPY 527
Fluoroquinolone-Containing Therapy 528
Bismuth Quadruple Therapy, Including Furazolidone-Containing Regimens 529
Rifabutin-Containing Therapy 529
PROBIOTICS 530
SUMMARY 530
REFERENCES 531
How to Effectively Use Bismuth Quadruple Therapy 537
Key points 538
BACKGROUND 538
BISMUTH IN THE ERA OF NEW CONCEPTS REGARDING PATHOGENESIS AND TREATMENT OF PEPTIC ULCER 538
BISMUTH QUADRUPLE THERAPY FOR H PYLORI ERADICATION 540
THE EFFECT OF METRONIDAZOLE RESISTANCE AS EXAMINED BY META-ANALYSIS 542
CALCULATION OF THE EFFECTIVENESS OF BISMUTH QUADRUPLE THERAPY 542
ADHERENCE (COMPLIANCE) WITH BISMUTH QUADRUPLE THERAPY 543
Adherence to the Protocol 543
HOW TO MAKE BISMUTH QUADRUPLE THERAPY MORE ACCEPTABLE 546
DOXYCYCLINE 547
EXAMINATION OF OUTCOME IN REGIONS WHERE BISMUTH QUADRUPLE THERAPY FREQUENTLY FAILS (EG, TURKEY AND IRAN) 547
BISMUTH, TETRACYCLINE, AMOXICILLIN, PROTON PUMP INHIBITORS QUADRUPLE THERAPY 552
BISMUTH SEQUENTIAL THERAPIES 552
INFORMATION NEEDED TO OBTAIN GENERALIZABLE RESULTS 552
ISSUES RIPE FOR SYSTEMATIC STUDY 554
Relation of Drug Administration and Meals 554
Reduction of Side Effects with Bismuth Quadruple Therapy 555
PROTON PUMP INHIBITORS DOSAGE 556
EFFICIENT STUDY DESIGN 556
RECOMMENDATIONS 556
REFERENCES 557
Is There a Role for Probiotics in Helicobacter pylori Therapy? 565
Key points 565
WHAT PROBIOTICS ARE 565
PROBIOTICS 566
Use of Probiotics Clinically 567
PROBIOTICS AS ADJUVANT THERAPY FOR HELICOBACTER PYLORI ERADICATION 567
PROBIOTICS AS CURE FOR HELICOBACTER PYLORI INFECTION 569
SUMMARY 572
REFERENCES 572
Molecular Approaches to Identify Helicobacter pylori Antimicrobial Resistance 577
Key points 577
MOLECULAR DETERMINATION OF HELICOBACTER PYLORI RESISTANCE TO MACROLIDES 578
Mechanisms 578
Methods 579
Real-time polymerase chain reaction for detection of Helicobacter pylori resistance to macrolides 579
Principle 579
Advantages of this procedure 580
Variants of the method 581
The TaqMan format 581
Advantages and limitations 581
The scorpion format 581
Multiplex polymerase chain reaction followed by strip hybridization 581
Advantages and limits 581
Dual priming oligonucleotide–polymerase chain reaction 583
Other polymerase chain reaction–based assays 583
Nested polymerase chain reaction followed by sequencing or standard polymerase chain reaction followed by sequencing or res ... 583
Allele-specific primer polymerase chain reaction 584
Primer mismatch polymerase chain reaction 584
Invader assay for single nucleotide polymorphism genotyping 584
Non–polymerase chain reaction–based assays 585
Fluorescence in situ hybridization 585
Advantages 585
Peptide nucleic acid–fluorescence in situ hybridization 585
Other methods 586
Correlation with Clinical Outcome 586
MOLECULAR DETERMINATION OF HELICOBACTER PYLORI RESISTANCE TO FLUOROQUINOLONES 588
Mechanisms 588
Methods 588
Real-time polymerase chain reaction 588
Multiplex polymerase chain reaction followed by strip hybridization 588
Other polymerase chain reaction–based assays 588
Sequencing of the gyrA quinolone resistance-determining region 588
Allele-specific polymerase chain reaction 589
Correlation with Clinical Outcome 589
MOLECULAR DETERMINATION OF HELICOBACTER PYLORI RESISTANCE TO TETRACYCLINE 589
Mechanisms 589
Methods 590
Real-time polymerase chain reaction 590
Standard polymerase chain reaction followed by sequencing or polymerase chain reaction–restriction length polymorphism 590
MOLECULAR DETERMINATION OF HELICOBACTER PYLORI RESISTANCE TO OTHER ANTIBIOTICS 590
Rifampins 590
Amoxicillin 590
5-Nitroimidazoles 591
REFERENCES 591
When Is Endoscopic Follow-up Appropriate After Helicobacter pylori Eradication Therapy? 597
Key points 597
INTRODUCTION 597
HELICOBACTER PYLORI ERADICATION 599
UNINVESTIGATED AND NONULCER DYSPEPSIA 599
PEPTIC ULCER 600
PREMALIGNANT GASTRIC LESIONS AND EARLY GASTRIC CANCER 601
HEREDITARY RISK FOR GASTRIC CANCER 603
MUCOSA-ASSOCIATED LYMPHOID TISSUE LYMPHOMA 604
SUMMARY 605
REFERENCES 605
Gastric Cancer Risk in Patients with Helicobacter pylori Infection and Following Its Eradication 609
Key points 609
INTRODUCTION 610
HELICOBACTER PYLORI INFECTION IS THE MOST IMPORTANT DETERMINANT OF GASTRIC CANCER RISK 610
GASTRIC CANCER RISK: EPIDEMIOLOGIC TRENDS 611
GASTRIC CANCER RISK: THE ASSESSMENT 611
Demographics 611
Noninvasive Methods 612
Invasive Methods 614
Endoscopy and biopsy protocols 614
Histology 614
GASTRIC CANCER RISK IN ERADICATED PATIENTS 615
Helicobacter pylori Eradication as a Primary Prevention of Gastric Cancer 616
How to Assess/Quantify Cancer Risk After Helicobacter pylori Eradication 616
SUMMARY 620
REFERENCES 621
Molecular Pathogenesis of Helicobacter pylori-Related Gastric Cancer 625
Key points 625
INTRODUCTION 625
CLASSIFICATIONS AND CHARACTERIZATIONS OF GASTRIC CANCER 626
HELICOBACTER PYLORI VIRULENCE FACTORS ON GASTRIC EPITHELIUM DURING GASTRIC CARCINOGENESIS 627
Roles of CagA in Gastric Carcinogenesis 627
Roles of Vacuolating Cytotoxin A in Gastric Carcinogenesis 629
Role of Peptidoglycan in Gastric Carcinogenesis 629
HELICOBACTER PYLORI-INDUCED INFLAMMATORY RESPONSES DURING GASTRIC CARCINOGENESIS 629
GENETIC AND EPIGENETIC ALTERATIONS DURING GASTRIC CARCINOGENESIS 630
Mechanisms of Induction of Genetic Alterations 630
Deamination 630
Oxidative stress 631
Chromosomal instability 632
Mechanisms of Induction of Epigenetic Alterations 632
Mechanisms of Induction of microRNA Alterations 633
SUMMARY 633
REFERENCES 633
Helicobacter pylori Eradication to Eliminate Gastric Cancer 639
Key points 639
INTRODUCTION 639
PREVIOUS PREVENTIVE MEASURES FOR GASTRIC CANCER IN JAPAN 640
CURRENT STATUS AND CHARACTERISTICS OF SCREENING FOR GASTRIC CANCER IN JAPAN 640
THE EFFECT OF HELICOBACTER PYLORI ERADICATION FOR GASTRIC CANCER PREVENTION 642
HEALTH INSURANCE COVERAGE FOR HELICOBACTER PYLORI ERADICATION THERAPY IN JAPAN 642
STRATEGY FOR THE ELIMINATION OF GASTRIC CANCER IN JAPAN 643
REFERENCES 646
Treatment Strategy for Gastric Mucosa-Associated Lymphoid Tissue Lymphoma 649
Key points 649
INTRODUCTION 649
PATHOGENESIS 650
Helicobacter pylori 650
Genetic Aberrations 650
DIAGNOSIS 650
Histopathology 650
Endoscopic Findings 651
Clinical Staging 652
TREATMENTS 652
Helicobacter pylori Eradication 652
Strategies for Patients not Responding to Helicobacter pylori Eradication 657
SUMMARY/DISCUSSION 657
REFERENCES 658
Rationale for a Helicobacter pylori Test and Treatment Strategy in Gastroesophageal Reflux Disease 661
Key points 661
INTRODUCTION 661
THE EFFECT OF PROTON PUMP INHIBITOR TREATMENT ON CHRONIC HELICOBACTER PYLORI–RELATED GASTRITIS 662
THE EFFECT OF HELICOBACTER PYLORI ERADICATION ON CHRONIC GASTRITIS AND ATROPHY RELATED TO HELICOBACTER PYLORI INFECTION 662
GASTRITIS AND ADENOCARCINOMA IN MONGOLIAN GERBILS 662
A CONTROLLED TRIAL OF PROTON PUMP INHIBITOR THERAPY IN INFECTED SUBJECTS WITH GASTROESOPHAGEAL REFLUX DISEASE 663
THE CASE AGAINST HELICOBACTER PYLORI ERADICATION THERAPY IN GASTROESOPHAGEAL REFLUX DISEASE 663
COST-EFFECTIVENESS ANALYSIS 664
SUMMARY 665
REFERENCES 665
Screening to Identify and Eradicate Helicobacter pylori Infection in Teenagers in Japan 667
Key points 667
INTRODUCTION 668
AN EXAMINATION AND TREATMENT OF HELICOBACTER PYLORI IN HIGH SCHOOL STUDENTS 668
First Screening Examination for Helicobacter pylori Infection 668
Further Examination for Helicobacter pylori Infection 668
Endoscopic Findings 669
Histologic Findings 670
Susceptibility of Helicobacter pylori to Clarithromycin, Metronidazole, and Amoxicillin 671
Outcome of Helicobacter pylori Eradication Therapy 671
Adverse Effects 672
Costs 672
DISCUSSION 672
Other Effectiveness Except Preventing of Gastric Cancers 674
Problems of Treatment of Helicobacter pylori Infection in High School Students 674
Other Studies of a Screen-and-Treat Approach for Helicobacter pylori Infection in Japanese Adolescents 675
SUMMARY 675
REFERENCES 675
Current Status and Prospects for a Helicobacter pylori Vaccine 677
Key points 677
THE NEED FOR AN HELICOBACTER PYLORI VACCINE: LATE DIAGNOSIS OF HELICOBACTER PYLORI-ASSOCIATED GASTRIC CANCER 677
HIGH INCIDENCE OF GASTRIC CANCER IN DEVELOPING NATIONS 678
CHALLENGES IN INDUCING PROTECTIVE HELICOBACTER PYLORI IMMUNITY AT THE GASTRIC MUCOSA 678
RESULTS FROM THE MOUSE MODEL THAT CONTRIBUTED TO VACCINE DEVELOPMENT 679
CLINICAL TRIALS 681
RETROSPECTIVE ANALYSIS AND NEW CONSIDERATIONS IN HELICOBACTER PYLORI VACCINE DEVELOPMENT 683
REFERENCES 685
Index 691