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Bronchopulmonary Dysplasia: An Update, An Issue of Clinics in Perinatology, E-Book

Bronchopulmonary Dysplasia: An Update, An Issue of Clinics in Perinatology, E-Book

Suhas G. Kallapur

(2016)

Additional Information

Abstract

Bronchopulmonary dysplasia (BPD) as a chronic lung disease affecting preterm infants has been recognized for more than 45 years. However, little progress has been made in the prevention and treatment of the disease. BPD continues to be a major morbidity affecting preterm infants. Studies in pre-adolescent children demonstrate that the abnormal lung function from BPD persists well into childhood. Infants with BPD also have an increased risk for adverse neurodevelopmental outcome. Thus BPD imposes a significant burden of adverse health outcomes in preterm infants.

The major risk factors for BPD are prematurity, mechanical ventilation, exposure to noxious insults such as oxygen, infections. New research data both in basic science and clinical studies have shed light on the pathogenesis, and possible new treatment or management strategies for the future. In the proposed issue of the Clinics in Perinatology, we would like to comprehensively cover BPD both from a basic science and clinical perspective. Our attempt is to balance new information along with classic topics. The proposed authors for the issue are recognized experts in the topic area/s. We hope that the issue will be of interest to a broad array of readership.

Table of Contents

Section Title Page Action Price
Front Cover Cover
Bronchopulmonary Dysplasia: An Update\r i
Copyright\r ii
Contributors iii
CONSULTING EDITOR iii
EDITORS iii
AUTHORS iii
Contents vii
Foreword: Why the Bronchopulmonary Dysplasia Improvement Curve Lags Behind\x0B vii
Preface: Bronchopulmonary Dysplasia—The Search for Answers Continues\r vii
Update on Molecular Biology of Lung Development—Transcriptomics\r vii
Postnatal Infections and Immunology Affecting Chronic Lung Disease of Prematurity\r vii
Role of Ureaplasma Respiratory Tract Colonization in Bronchopulmonary Dysplasia Pathogenesis: Current Concepts and Update\r vii
Biomarkers, Early Diagnosis, and Clinical Predictors of Bronchopulmonary Dysplasia\r viii
Evidence-Based Pharmacologic Therapies for Prevention of Bronchopulmonary Dysplasia: Application of the Grading of Recommen ... viii
Mechanical Ventilation and Bronchopulmonary Dysplasia\r viii
Impact of Nutrition on Bronchopulmonary Dysplasia\r viii
Oxygen Saturation Targeting and Bronchopulmonary Dysplasia\r ix
Hypoxic Episodes in Bronchopulmonary Dysplasia\r ix
Pulmonary Hypertension and Vascular Abnormalities in Bronchopulmonary Dysplasia\r ix
Airway Disease and Management in Bronchopulmonary Dysplasia\r ix
Newer Imaging Techniques for Bronchopulmonary Dysplasia\r x
Bronchopulmonary Dysplasia and Chronic Lung Disease: Stem Cell Therapy\r x
The Natural History of Bronchopulmonary Dysplasia: The Case for Primary Prevention\r x
PROGRAM OBJECTIVE xi
TARGET AUDIENCE xi
LEARNING OBJECTIVES xi
ACCREDITATION xi
DISCLOSURE OF CONFLICTS OF INTEREST xi
UNAPPROVED/OFF-LABEL USE DISCLOSURE xi
TO ENROLL xii
METHOD OF PARTICIPATION xii
CME INQUIRIES/SPECIAL NEEDS xii
CLINICS IN PERINATOLOGY\r xiii
FORTHCOMING ISSUES xiii
March 2016 xiii
June 2016 xiii
September 2016 xiii
RECENT ISSUES xiii
September 2015 xiii
June 2015 xiii
March 2015 xiii
Foreword: Why the Bronchopulmonary Dysplasia Improvement Curve Lags Behind \r xv
REFERENCES xvii
Preface: Bronchopulmonary Dysplasia—The Search for Answers Continues \r xix
Update on Molecular Biology of Lung Development—Transcriptomics 685
Key points 685
INTRODUCTION 685
DISCUSSION 686
Introduction to Lung Development 686
Molecular Stages of Development 687
Ontogeny of Lung Epithelial Cells 688
Regulation of Diversity of Lung Mesenchyme 689
A Molecular Basis for Dysanapsis? 690
Integrated Genomics Analysis of Development 690
A Molecular Atlas for Lung Development 691
Transcriptomics of Bronchopulmonary Dysplasia 691
REFERENCES 692
Postnatal Infections and Immunology Affecting Chronic Lung Disease of Prematurity 697
Key points 697
INTRODUCTION 697
INFLAMMATION AS A MECHANISM FOR RESPIRATORY MORBIDITY 699
PRENATAL INDUCTION OF INFLAMMATION AND RESPIRATORY MORBIDITY 699
Chorioamnionitis 699
Other Prenatal Proinflammatory Exposures 701
POSTNATAL INDUCTION OF INFLAMMATION AND RESPIRATORY MORBIDITY 701
Oxygen and Mechanical Ventilation 701
Bacterial Infection and Sepsis 701
Viral Infections 701
Neonatal Cytomegalovirus 702
Respiratory Syncytial Virus and Other Common Viruses 703
SUSCEPTIBILITY FACTORS FOR ENHANCED INFLAMMATION 704
Genetics 704
Alterations in Immune Responses Due to Developmental Window of Preterm Delivery 704
Evidence for Lymphocytic Abnormalities in Premature Infants with Lung Disease 705
Age at First Infection 706
Altered Establishment of Colonizing Microbiota 708
REFERENCES 709
Role of Ureaplasma Respiratory Tract Colonization in Bronchopulmonary Dysplasia Pathogenesis 719
Key points 719
INTRODUCTION 719
UREAPLASMA SPECIES 720
Ureaplasma Species Virulence Factors 721
Host Response to Ureaplasma Infection 721
Ureaplasma Species as Perinatal Pathogens Causing Preterm Birth 722
EPIDEMIOLOGIC EVIDENCE FOR ROLE OF UREAPLASMA SPECIES IN BRONCHOPULMONARY DYSPLASIA PATHOGENESIS 722
Characteristics of Infants with Ureaplasma Respiratory Tract Colonization 722
Association of Ureaplasma Respiratory Tract Colonization and Bronchopulmonary Dysplasia 723
Ureaplasma Species and Lung Inflammation in the Developing Lung: Animal Studies 725
DIAGNOSTIC METHODS 726
Culture Methods 726
Colorimetric Assays 727
Molecular Diagnostic Methods 727
THERAPEUTIC CONSIDERATIONS 727
Macrolide Antibiotics 727
Efficacy Studies 727
Pharmacokinetics Studies 732
BEST PRACTICES: CURRENT RECOMMENDATIONS AND THE FUTURE 732
REFERENCES 732
Biomarkers, Early Diagnosis, and Clinical Predictors of Bronchopulmonary Dysplasia 739
Key points 739
INTRODUCTION 739
WHY DO WE NEED BIOMARKERS OR PREDICTORS? 740
BIOMARKERS 741
Clinical Predictors as Biomarkers of Bronchopulmonary Dysplasia 741
Imaging Biomarkers of Bronchopulmonary Dysplasia 742
Chest radiographs 742
Chest computed tomography scans 743
Chest MRI 743
Echocardiogram for the diagnosis of pulmonary hypertension in bronchopulmonary dysplasia 744
Lung Function Biomarkers 744
Biofluid Biomarkers 744
Blood 744
Inflammatory markers 745
Angiogenic growth factors 745
Epithelial and fibrotic markers 745
Markers of pulmonary hypertension in bronchopulmonary dysplasia 745
Tracheal aspirate or bronchoalveolar lavage 746
Inflammatory, fibrotic and epithelial markers 746
Oxidant injury markers 746
Angiogenic growth factors 747
Other factors 747
Urine 747
Exhaled Breath Condensates as Biomarkers 747
Genomic Biomarkers 747
Differences in the genome 748
Differences in gene expression 748
Respiratory Microbiome as a Biomarker of Bronchopulmonary Dysplasia 748
THE FUTURE OF BRONCHOPULMONARY DYSPLASIA DIAGNOSTICS AND BIOMARKERS 749
REFERENCES 749
Evidence-Based Pharmacologic Therapies for Prevention of Bronchopulmonary Dysplasia 755
Key points 755
INTRODUCTION 755
Grading of Recommendations Assessment, Development, and Evaluation Framework 756
METHODS 756
Search Strategy 756
Study Selection 757
Clinical Trials Registry Search 757
SUMMARY OF THE EVIDENCE FOR INDIVIDUAL THERAPIES 757
Azithromycin 757
Systematic search results 758
Risk-to-benefit comparison 758
Overall quality of the evidence 758
Recommendation 758
Caffeine 758
Systematic search results 761
Azithromycin 761
Caffeine 761
Dexamethasone 761
Vitamin A 761
Risk-to-benefit comparison 764
Timing of caffeine initiation 764
Quality of the evidence 764
Recommendation 764
Dexamethasone 765
Systematic search results 765
Risk-to-benefit comparison 765
Quality of the evidence 769
Recommendation 772
Vitamin A 772
Systematic search results 772
Risk-to-benefit comparison 772
Quality of the evidence 773
Recommendation 774
CLINICAL TRIALS REGISTRY SEARCH RESULTS 774
SUMMARY 774
REFERENCES 774
Mechanical Ventilation and Bronchopulmonary Dysplasia 781
Key points 781
INTRODUCTION 781
WHAT IS VENTILATOR-ASSOCIATED LUNG INJURY? 783
MITIGATING VENTILATOR-ASSOCIATED LUNG INJURY 784
IMPORTANCE OF THE GOLDEN FIRST HOUR 784
POSITIVE END-EXPIRATORY PRESSURE IN THE DELIVERY ROOM 785
SUSTAINED INFLATION 785
HYPEROXIC INJURY 785
NONINVASIVE RESPIRATORY SUPPORT 786
LESS INVASIVE SURFACTANT ADMINISTRATION 787
LUNG-PROTECTIVE STRATEGIES OF MECHANICAL VENTILATION 787
Volume-targeted Ventilation 787
Importance of the Open Lung Strategy 789
High-frequency Ventilation 789
PUTTING IT ALL TOGETHER 791
SUMMARY 792
REFERENCES 792
Impact of Nutrition on Bronchopulmonary Dysplasia 797
Key points 797
INTRODUCTION 797
INTRAUTERINE GROWTH AND PULMONARY OUTCOMES 798
POSTNATAL GROWTH AND CLINICAL OUTCOMES 798
GROWTH OUTCOMES OF INFANTS WITH BRONCHOPULMONARY DYSPLASIA 799
CAUSE OF POOR GROWTH IN INFANTS WITH BRONCHOPULMONARY DYSPLASIA 799
NUTRITIONAL INTERVENTIONS TO PREVENT BRONCHOPULMONARY DYSPLASIA 799
IMPACT OF TREATMENT FOR BRONCHOPULMONARY DYSPLASIA ON NUTRITIONAL STATUS 800
NUTRITIONAL STRATEGIES TO OPTIMIZE GROWTH 800
POSTDISCHARGE MANAGEMENT OF INFANTS WITH BRONCHOPULMONARY DYSPLASIA 801
RESEARCH OPPORTUNITIES IN THE ROLE OF NUTRITION AND LUNG DISEASE 801
REFERENCES 803
Oxygen Saturation Targeting and Bronchopulmonary Dysplasia 807
Key points 807
INTRODUCTION 807
OXYGEN MONITORING 808
OXYGEN TOXICITY 809
HISTORY OF OXYGEN MONITORING IN PRETERM INFANTS 811
TRIALS OF OXYGEN SATURATION TARGETING AND BRONCHOPULMONARY DYSPLASIA 812
THE NEONATAL OXYGENATION PROSPECTIVE META-ANALYSIS TRIALS OF OXYGEN SATURATION TARGETING 813
THE NEONATAL OXYGENATION PROSPECTIVE META-ANALYSIS TRIALS AND BRONCHOPULMONARY DYSPLASIA 815
WHAT CAN BE CONCLUDED FROM THE EVIDENCE PUBLISHED TO DATE? 817
OTHER ISSUES THAT ARISE 818
REFERENCES 819
Hypoxic Episodes in Bronchopulmonary Dysplasia 825
Key points 825
INTRODUCTION 825
ROLE OF IMMATURE RESPIRATORY CONTROL IN BRONCHOPULMONARY DYSPLASIA 826
Data from Animal Models 826
Data from Human Infants 828
CONSEQUENCES OF INTERMITTENT HYPOXIC EPISODES 829
ROLE OF THE IMMATURE AIRWAY 831
ROLE OF PULMONARY VASOCONSTRICTION 833
SUMMARY 834
REFERENCES 834
Pulmonary Hypertension and Vascular Abnormalities in Bronchopulmonary Dysplasia 839
Key points 839
INTRODUCTION 840
PATHOGENESIS OF PULMONARY VASCULAR DISEASE IN BRONCHOPULMONARY DYSPLASIA 841
DIAGNOSIS AND EPIDEMIOLOGY OF PULMONARY VASCULAR DISEASE IN PRETERM INFANTS 842
RISK FACTORS FOR PERIPHERAL VASCULAR DISEASE AND PULMONARY HYPERTENSION IN PRETERM INFANTS 845
OTHER PULMONARY VASCULAR AND CARDIAC ABNORMALITIES ASSOCIATED WITH BRONCHOPULMONARY DYSPLASIA 846
TREATMENT OF PULMONARY HYPERTENSION IN BRONCHOPULMONARY DYSPLASIA 847
SUMMARY 850
REFERENCES 850
Airway Disease and Management in Bronchopulmonary Dysplasia 857
Key points 857
INTRODUCTION 857
RESPIRATORY SUPPORT OF CHILDREN WITH BRONCHOPULMONARY DYSPLASIA 858
WEANING FROM NASAL CONTINUOUS POSITIVE AIRWAY PRESSURE 858
HEATED HUMIDIFIED HIGH-FLOW NASAL CANNULA THERAPY IN CHILDREN 859
High-flow Nasal Cannula for Primary Respiratory Support 859
High-flow Nasal Cannula in Extremely Preterm Infants After Extubation 859
POSITIVE PRESSURE VENTILATION FOR TREATMENT OF APNEA OF PREMATURITY 860
OUTCOMES OF CHILDREN WITH SEVERE BRONCHOPULMONARY DYSPLASIA WHO ARE VENTILATOR DEPENDENT AT HOME 860
Predischarge Planning Includes the Following 861
Postdischarge Management 861
Prevention of Acute Superimposed on Chronic Respiratory Failure 861
Prevention of Gradual Respiratory Decompensation 861
AIRWAY MANAGEMENT OF CHILDREN WITH BRONCHOPULMONARY DYSPLASIA 862
SUBGLOTTIC STENOSIS 863
TRACHEOMALACIA AND TRACHEOBRONCHOMALACIA 865
INDICATIONS FOR TRACHEOTOMY PLACEMENT 865
TRACHEOTOMY TECHNIQUES AND GUIDELINES IN NEONATES 866
TRACHEOTOMY IN THE SETTING OF CHRONIC VENTILATOR DEPENDENCY 867
TIMING OF TRACHEOTOMY AND OUTCOMES IN PRETERM INFANTS 868
REFERENCES 868
Newer Imaging Techniques for Bronchopulmonary Dysplasia 871
Key points 871
INTRODUCTION 871
CHEST RADIOGRAPH 872
COMPUTERIZED TOMOGRAPHY 873
NUCLEAR MEDICINE 876
MRI 876
Conventional 1H MRI 877
Hyperpolarized-Gas MRI 880
SUMMARY 882
REFERENCES 882
Bronchopulmonary Dysplasia and Chronic Lung Disease 889
Key points 889
INTRODUCTION 890
MESENCHYMAL STROMAL CELLS 890
DISRUPTION OF MESENCHYMAL STROMAL CELL HOMEOSTASIS IN THE EVENTS THAT LEAD TO BRONCHOPULMONARY DYSPLASIA 890
PRECLINICAL EVIDENCE OF MESENCHYMAL STROMAL CELL EFFECTS ON ARRESTED LUNG DEVELOPMENT 890
Bronchopulmonary Dysplasia is an Arrest in Lung Development 890
Animal Models of Arrested Lung Development: the Hyperoxia-Induced Lung Injury 890
Treatment with Mesenchymal Stromal Cells Ameliorates Hyperoxia-Induced Arrest in Lung Growth 891
Prophylactic treatment 891
Rescue treatment 892
PRECLINICAL EVIDENCE OF MESENCHYMAL STROMAL CELL EFFECTS ON DISRUPTED VASCULAR DEVELOPMENT 892
Hypoplastic Vascular Bed in Human Bronchopulmonary Dysplasia 892
Hyperoxia Induces Pulmonary Vascular Disruption and Pulmonary Hypertension 892
Mesenchymal Stromal Cells Treatment Mitigates Hyperoxia-Related Pulmonary Hypertension 895
Prophylactic treatment 895
Rescue treatment 895
PRECLINICAL EVIDENCE OF MESENCHYMAL STROMAL CELL EFFECTS ON INFLAMMATION, OXIDATIVE STRESS, AND FIBROSIS 895
Mechanisms of Cellular Damage in Bronchopulmonary Dysplasia 895
Hyperoxia Induces Lung Inflammation, Fibrosis and Oxidative Stress 895
Mesenchymal Stromal Cells Reduce Hyperoxia-Induced Inflammation, Fibrosis, and Oxidative Stress 896
Prophylactic treatment 896
Rescue treatment 896
LONG-TERM CONSIDERATIONS FROM PRECLINICAL STUDIES 896
Life-Long Consequences of Bronchopulmonary Dysplasia 896
Animals Exposed to Hyperoxia in the Neonatal Period Show Long-Term Features of Bronchopulmonary Dysplasia 896
Beneficial Effects of Mesenchymal Stromal Cells Persist in Adult Rats 896
Mesenchymal Stromal Cells Display Long-Term Safety in the Hyperoxia-Induced Lung Injury 896
CONCLUSIONS FROM PRECLINICAL DATA 897
MECHANISM OF ACTION OF MESENCHYMAL STROMAL CELLS 897
Homing to Site of Injury and Regeneration 897
Paracrine Effect 899
Immunomodulatory Properties 900
CLINICAL TRANSLATION 900
EFFICACY OF MESENCHYMAL STROMAL CELL TREATMENT 900
Factors Affecting Efficacy of Stem Cell Treatment: Considerations 901
Timing 901
Rescue administration or treatment of established bronchopulmonary dysplasia 901
Prophylactic or early administration 901
Treatment of evolving bronchopulmonary dysplasia 901
Route of administration 901
Systemic administration 901
Endotracheal administration 901
Dose 904
Source 904
Adult sources: bone marrow and adipose tissue 904
Perinatal sources 904
Practical aspects of mesenchymal stromal cell manufacturing 904
Passage number 904
Culture conditions 905
Type of transplantation 905
Autologous 905
Allogeneic 905
SAFETY OF MESENCHYMAL STROMAL CELL TREATMENT 905
SUMMARY 906
REFERENCES 906
The Natural History of Bronchopulmonary Dysplasia 911
Key points 911
INTRODUCTION 911
NATURAL HISTORY OF PULMONARY FUNCTION TESTING MEASUREMENTS 912
Neonatal Studies 913
Infants 913
Children and Adolescents 921
Adults 921
NATURAL HISTORY OF RESPIRATORY SYMPTOMS IN PATIENTS WITH BRONCHOPULMONARY DYSPLASIA: CLINICAL PULMONARY OUTCOMES 922
Infants 922
Children 922
Adolescents and Young Adults 923
EVOLUTION OF RADIOGRAPHIC/HIGH-RESOLUTION COMPUTED TOMOGRAPHY CHANGES 923
EVOLUTION OF EXERCISE TOLERANCE THROUGH ADULTHOOD 924
NEED FOR PRIMARY PREVENTION OF BRONCHOPULMONARY DYSPLASIA 924
The Challenge of Defining a Healthy Lung in the Premature Infant 924
Causal Pathways of Bronchopulmonary Dysplasia 925
FUTURE GOALS AND RESEARCH PRIORITIES FOR BRONCHOPULMONARY DYSPLASIA PREVENTION 925
REFERENCES 927
Index 933