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PCR inhibitors Removal
US$ 30.00
Description
Contents
Reviews
Language
English
ISBN
Unknown
Front Matter
Title Page
Principles, Mechanisms, Technologies, and Applications
Copyright
Dedication
Preface
Table of Contents
Part I
Fundamentals
Abstract
1.1 Historical Background
References
Part II
Biological Sources of PCR Inhibitors
Part III
Mechanisms of PCR Inhibition
Part IV
Sample Preparation
Part V
Inhibitor Removal Technologies
Part VI
Advanced Technologies
Part VII
Applications
Part VIII
Quality Assurance
Introduction to PCR Inhibition
Chapter 2
PCR Chemistry and the Molecular Mechanisms of PCR Inhibition
Abstract
2.1 The Biochemical Basis of PCR
2.2 Essential Components of PCR
2.2.1 DNA Template
2.2.2 Primers
2.2.3 DNA Polymerase
2.2.4 Magnesium Ions
2.2.5 dNTPs
2.3 Amplification Efficiency
2.4 Molecular Mechanisms of PCR Inhibition
Mechanism 1: DNA Polymerase Inactivation
Mechanism 2: DNA Template Binding
Mechanism 3: Magnesium Chelation
Mechanism 4: Primer Interference
Mechanism 5: DNA Degradation
Mechanism 6: Fluorescence Suppression
2.5 Kinetics of PCR Inhibition
Mild inhibition
Moderate inhibition
Severe inhibition
2.6 Competitive versus Non-Competitive Inhibition
Competitive inhibition
Non-competitive inhibition
2.7 Matrix Effects
2.8 Internal Amplification Controls (IACs)
2.9 Emerging Strategies to Overcome PCR Inhibition
2.10 Chapter Summary
References
Chapter 3
DNA Polymerases and Their Sensitivity to PCR Inhibitors
Abstract
3.1 Introduction
3.2 Structural Features of DNA Polymerases
3.3 Catalytic Mechanism
3.4 Major Thermostable DNA Polymerases
3.4.1 Taq DNA Polymerase
3.4.2 Pfu DNA Polymerase
3.4.3 Phusion DNA Polymerase
3.4.4 Q5 High-Fidelity Polymerase
3.4.5 KOD DNA Polymerase
3.5 Hot-Start DNA Polymerases
3.6 Mechanisms of Polymerase Inhibition
3.6.1 Direct Enzyme Binding
3.6.2 Magnesium Sequestration
3.6.3 Competitive Inhibition
3.6.4 Conformational Destabilization
3.7 Polymerase Sensitivity to Common PCR Inhibitors
3.8 Engineered Polymerases Resistant to Inhibitors
3.9 Additives That Protect DNA Polymerases
Bovine Serum Albumin (BSA)
Betaine
Dimethyl Sulfoxide (DMSO)
Trehalose
T4 Gene 32 Protein
3.10 Selecting the Appropriate Polymerase
3.11 Quality Control of DNA Polymerase
3.12 Future Directions
3.13 Chapter Summary
References
Chapter 4
Classification of PCR Inhibitors: Chemical, Biological, Environmental, and Technical Sources
Abstract
4.1 Introduction
4.2 Classification by Chemical Nature
4.2.1 Proteins
4.2.2 Polysaccharides
4.2.3 Polyphenols
4.2.4 Lipids
4.2.5 Humic Substances
4.2.6 Heavy Metals
4.2.7 Salts
4.3 Classification by Biological Source
4.3.1 Blood
4.3.2 Plant Tissues
4.3.3 Food Samples
4.3.4 Soil
4.3.5 Feces
4.3.6 Environmental Water
4.4 Classification by Sample Matrix
4.5 Classification by Mechanism of Action
Polymerase inhibitors
DNA-binding inhibitors
Magnesium chelators
Primer interference compounds
Fluorescence inhibitors
4.6 Classification by Origin
Natural inhibitors
Artificial inhibitors
4.7 Classification by Removal Difficulty
Easily removed
Moderately difficult
Difficult
Extremely difficult
4.8 Synergistic Effects of Multiple Inhibitors
4.9 Emerging PCR Inhibitors
4.10 Practical Considerations for Inhibitor Identification
4.11 Chapter Summary
References
Chapter 5
Blood-Derived PCR Inhibitors: Sources, Mechanisms, Detection, and Removal Strategies
Abstract
5.1 Introduction
5.2 Composition of Whole Blood
5.3 Major Blood-Derived PCR Inhibitors
5.3.1 Hemoglobin
Structure
Mechanisms of PCR Inhibition
5.3.4 Immunoglobulins
5.3.5 Leukocyte-Derived Proteins
5.3.6 Complement Proteins
5.3.2 Heme
Mechanisms
5.3.3 Lactoferrin
5.4 Anticoagulants as PCR Inhibitors
5.4.1 Heparin
5.4.2 EDTA
5.4.3 Sodium Citrate
5.5 Mechanisms of Blood-Mediated PCR Inhibition
5.6 Factors Influencing Blood PCR Inhibition
5.7 Detection of Blood-Derived PCR Inhibition
Internal Amplification Controls (IACs)
Serial Dilution
Spike-and-Recovery Experiments
Spectrophotometric Analysis
5.8 Strategies for Removing Blood-Derived PCR Inhibitors
5.8.1 Silica Column Purification
5.8.2 Magnetic Bead-Based Extraction
5.8.3 Proteinase K Digestion
5.8.4 Selective Red Blood Cell Lysis
5.8.5 Organic Extraction
5.8.6 Commercial Blood DNA Kits
5.9 PCR Additives for Blood Samples
Bovine Serum Albumin (BSA)
Betaine
Trehalose
Inhibitor-Resistant Polymerases
5.10 Direct PCR from Blood
5.11 Best Practices for Clinical Laboratories
5.12 Future Perspectives
5.13 Chapter Summary
References
Chapter 6
Food Matrix PCR Inhibitors: Sources, Molecular Mechanisms, Sample Preparation, and Advanced Removal Strategies
Abstract
6.1 Introduction
6.2 Why Food Is a Challenging PCR Matrix
6.3 Classification of Food-Derived PCR Inhibitors
6.3.1 Proteins
6.3.2 Lipids
6.3.3 Polysaccharides
6.3.4 Polyphenols
6.3.5 Minerals
6.3.6 Food Additives
6.4 Matrix-Specific PCR Inhibitors
6.4.1 Meat
Mechanisms
6.4.3 Seafood
6.4.4 Milk
6.4.5 Cheese
6.4.6 Fruits
6.4.7 Vegetables
6.4.8 Chocolate
6.4.9 Spices
6.4.2 Poultry
6.5 Effects of Food Processing
Heat Treatment
Smoking
Fermentation
Drying
6.6 Sample Preparation Strategies
6.7 Removal of Food-Derived PCR Inhibitors
6.7.1 Proteinase K Digestion
6.7.2 Detergent-Based Lysis
6.7.3 Organic Extraction
6.7.4 Silica Column Purification
6.7.5 Magnetic Beads
6.7.6 PVPP
6.7.7 Activated Charcoal
6.8 PCR Additives for Food Samples
Bovine Serum Albumin (BSA)
Betaine
DMSO
Trehalose
6.9 Detection of PCR Inhibition
6.10 Emerging Technologies
6.11 Case Study: Detection of Escherichia coli
O157:H7 in Ground Beef
6.12 Best Laboratory Practices
6.13 Chapter Summary
References
Chapter 7
Plant-Derived PCR Inhibitors: Chemical Diversity, Mechanisms of Inhibition, and Advanced DNA Purification Strategies
Abstract
7.1 Introduction
7.2 Why Plant Samples Are Difficult
7.3 Major Plant-Derived PCR Inhibitors
7.3.1 Polysaccharides
Mechanisms
7.3.4 Lignin
7.3.5 Cellulose
7.3.6 Chlorophyll
7.3.7 Essential Oils
7.3.8 Alkaloids
7.3.2 Polyphenols
Mechanisms
7.3.3 Tannins
7.4 Variation Among Plant Species
7.5 Effects of Plant Development
7.6 Environmental Influences
7.7 Sample Preparation
7.8 Removal of Plant PCR Inhibitors
7.8.1 CTAB Extraction
7.8.2 Polyvinylpyrrolidone (PVP)
7.8.3 Polyvinylpolypyrrolidone (PVPP)
7.8.4 β-Mercaptoethanol
7.8.5 Proteinase K
7.8.6 Silica Column Purification
7.8.7 Magnetic Bead Purification
7.9 PCR Enhancers
BSA
Betaine
DMSO
Trehalose
7.10 Quality Assessment
Spectrophotometry
Fluorometry
Gel Electrophoresis
Internal Amplification Controls
7.11 Advanced Technologies
7.12 Case Study: Grapevine DNA Extraction
7.13 Best Laboratory Practices
7.14 Chapter Summary
References
Chapter 8
Soil and Environmental PCR Inhibitors: Humic Substances, Fulvic Acids, Clay Minerals, Heavy Metals, Organic Pollutants, and Advanced Purification Technologies
Abstract
8.1 Introduction
8.2 Complexity of Soil Matrices
8.3 Humic Substances
8.3.1 Humic Acids
Mechanisms of PCR Inhibition
8.3.3 Humin
8.3.2 Fulvic Acids
8.4 Clay Minerals
Mechanisms
8.5 Heavy Metals
Mechanisms
8.6 Organic Pollutants
8.7 Plant-Derived Contaminants in Soil
8.8 Microbial Products
8.9 Salts
8.10 Matrix-Specific Environmental Inhibitors
8.11 Mechanisms of Environmental PCR Inhibition
Polymerase Inactivation
DNA Adsorption
Magnesium Chelation
Fluorescence Quenching
Physical Entrapment
8.12 Sample Collection
8.13 DNA Extraction Strategies
Mechanical Lysis
Chemical Lysis
Enzymatic Lysis
8.14 Removal of Environmental PCR Inhibitors
8.14.1 Silica-Based Purification
8.14.2 Magnetic Beads
8.14.3 PVPP
8.14.4 Activated Charcoal
8.14.5 Ion-Exchange Resins
8.14.6 Size-Exclusion Chromatography
8.15 PCR Additives
Bovine Serum Albumin (BSA)
Betaine
Trehalose
Inhibitor-Resistant Polymerases
8.16 Detection of PCR Inhibition
8.17 Applications
8.18 Emerging Technologies
8.19 Best Laboratory Practices
8.20 Chapter Summary
References
Chapter 9
Clinical Specimen PCR Inhibitors: Sources, Mechanisms, Detection, and Advanced Removal Strategies
Abstract
9.1 Introduction
9.2 Sources of PCR Inhibitors in Clinical Specimens
9.3 Blood
9.4 Serum and Plasma
Challenges
9.5 Urine
Major inhibitors
Mechanisms
9.6 Cerebrospinal Fluid (CSF)
9.7 Saliva
Mechanisms
9.8 Respiratory Specimens
Major inhibitors
9.9 Stool
9.10 Tissue Biopsies
Formalin-Fixed Paraffin-Embedded (FFPE) Tissue
9.11 Synovial Fluid
9.12 Pleural, Peritoneal, and Pericardial Fluids
9.13 Vaginal and Cervical Specimens
9.14 Semen
9.15 Collection Devices as Sources of Inhibitors
9.16 Medications and Diagnostic Agents
9.17 Detection of PCR Inhibition
Internal Amplification Controls (IACs)
Spike-and-Recovery Testing
Serial Dilution
DNA Purity Assessment
9.18 Removal of Clinical PCR Inhibitors
Silica Membrane Purification
Magnetic Bead Extraction
Proteinase K Digestion
Differential Centrifugation
Selective Lysis
9.19 PCR Additives
Bovine Serum Albumin
Betaine
Trehalose
Engineered Polymerases
9.20 Quality Assurance
9.21 Emerging Technologies
9.22 Best Laboratory Practices
9.23 Chapter Summary
References
Chapter 10
Veterinary and Wildlife Specimen PCR Inhibitors: Challenges, Matrix-Specific Removal Strategies, and Molecular Diagnostic Applications
Abstract
10.1 Introduction
10.2 Diversity of Veterinary Specimens
10.3 Blood Samples
10.4 Milk
Mechanisms
10.5 Fecal Samples
10.6 Respiratory Samples
10.7 Tissue Samples
10.8 Hair, Wool, and Fur
10.9 Feathers
10.10 Eggs
10.11 Semen
10.12 Urine
10.13 Wildlife Samples
10.14 Aquatic Animal Samples
10.15 Veterinary Pharmaceuticals
10.16 Environmental Contamination
10.17 DNA Extraction Strategies
Mechanical disruption
Enzymatic digestion
Chemical lysis
DNA purification
10.18 Removal of Veterinary PCR Inhibitors
Proteinase K digestion
Magnetic bead purification
PVPP
Activated charcoal
Differential centrifugation
10.19 PCR Additives
10.20 Detection of PCR Inhibition
10.21 Applications
10.22 One Health Perspective
10.23 Future Perspectives
10.24 Best Laboratory Practices
10.25 Chapter Summary
References
Chapter 11
Marine and Aquatic PCR Inhibitors: Sources, Molecular Mechanisms, Removal Technologies, and Applications in Aquatic Pathogen Detection
Abstract
11.1 Introduction
11.2 Types of Aquatic Samples
11.3 Major Marine and Aquatic PCR Inhibitors
11.3.1 Salts
Mechanisms
11.3.3 Extracellular Polymeric Substances (EPS)
11.3.4 Algal Polysaccharides
11.3.5 Pigments
11.3.6 Heavy Metals
11.3.7 Organic Pollutants
11.3.2 Humic Substances
11.4 Matrix-Specific PCR Inhibitors
11.5 Fish Tissue
11.6 Shellfish
11.7 Algae
Green algae
Brown algae
Red algae
11.8 Aquatic Biofilms
11.9 Environmental DNA (eDNA)
11.10 Sample Collection
11.11 DNA Extraction
Filtration-based concentration
Mechanical lysis
Chemical lysis
Enzymatic digestion
11.12 Removal of Marine PCR Inhibitors
Silica Columns
Magnetic Beads
Ethanol Washing
PVPP
Activated Charcoal
Desalting Columns
11.13 PCR Additives
Bovine Serum Albumin (BSA)
Betaine
Trehalose
Inhibitor-Resistant Polymerases
11.14 Detection of PCR Inhibition
11.15 Applications
11.16 Emerging Technologies
11.17 Best Laboratory Practices
11.18 Chapter Summary
References
Chapter 12
Wastewater and Sewage PCR Inhibitors: Challenges, Removal Technologies, and Applications in Wastewater-Based Epidemiology
Abstract
12.1 Introduction
12.2 Composition of Wastewater
12.3 Major PCR Inhibitors in Wastewater
12.3.1 Humic and Fulvic Acids
Mechanisms
12.3.3 Organic Matter
12.3.4 Detergents and Surfactants
12.3.5 Heavy Metals
12.3.6 Pharmaceuticals
12.3.7 Fats, Oils, and Grease (FOG)
12.3.8 Suspended Solids
12.3.2 Extracellular Polymeric Substances (EPS)
12.4 Matrix-Specific Inhibitors
12.5 Wastewater Treatment Processes and PCR Inhibitors
Primary Treatment
Secondary Treatment
Tertiary Treatment
12.6 Sample Collection and Preservation
12.7 Sample Concentration Methods
Centrifugation
Membrane Filtration
Ultrafiltration
Polyethylene Glycol (PEG) Precipitation
12.8 DNA and RNA Extraction
Mechanical Lysis
Chemical Lysis
Enzymatic Digestion
12.9 Removal of Wastewater PCR Inhibitors
Silica Membrane Purification
Magnetic Bead Technology
PVPP
Activated Charcoal
Ion-Exchange Chromatography
Size-Exclusion Chromatography
12.10 PCR Enhancers
Bovine Serum Albumin (BSA)
Betaine
Trehalose
Engineered Polymerases
12.11 Detection of PCR Inhibition
12.12 Applications in Wastewater-Based Epidemiology
Viruses
Bacteria
Parasites
Antimicrobial Resistance Genes
12.13 Emerging Technologies
12.14 Best Laboratory Practices
12.15 Future Perspectives
12.16 Chapter Summary
References
Transition to Part III
Part III – Molecular Mechanisms of PCR Inhibition
Chapter 13
Molecular Mechanisms of DNA Polymerase Inhibition: Enzyme Structure, Catalytic Disruption, and Strategies for Overcoming Polymerase Inactivation
Abstract
13.1 Introduction
13.2 Structure of Thermostable DNA Polymerases
13.2.1 Palm Domain
13.2.2 Fingers Domain
13.2.3 Thumb Domain
13.3 Catalytic Cycle
13.4 Two-Metal-Ion Catalytic Mechanism
Metal Ion A
Metal Ion B
13.5 Categories of Polymerase Inhibition
13.5.1 Direct Polymerase Binding
13.5.2 Active-Site Inhibition
13.5.3 Conformational Changes
13.5.4 Protein Denaturation
13.6 Magnesium Chelation
13.7 Oxidative Damage
13.8 Competitive Inhibition
13.9 Noncompetitive Inhibition
13.10 Mixed Inhibition
13.11 Polymerase Sensitivity
13.12 Polymerase Kinetics
13.13 Structural Biology of Polymerase-Inhibitor Interactions
13.14 Laboratory Detection of Polymerase Inhibition
Internal Amplification Controls
Enzyme Activity Assays
Standard Curve Analysis
Digital PCR
13.15 Strategies to Overcome Polymerase Inhibition
Selection of Resistant Polymerases
Optimization of Magnesium Concentration
Bovine Serum Albumin
Betaine
Trehalose
Improved DNA Purification
13.16 Future Directions
13.17 Best Laboratory Practices
13.18 Chapter Summary
References
Chapter 14
DNA Template Binding and Structural Modification by PCR Inhibitors: Molecular Mechanisms, Detection, and Removal Strategies
Abstract
14.1 Introduction
14.2 DNA as the Primary PCR Template
14.3 Categories of DNA–Inhibitor Interactions
14.4 Surface Adsorption
Mechanism
14.5 Electrostatic Binding
14.6 Covalent Modification
Consequences
14.7 DNA Oxidation
14.8 DNA Intercalation
14.9 DNA Cross-Linking
14.10 DNA Condensation
14.11 DNA Fragmentation
14.12 Matrix-Specific DNA Modifications
14.13 Influence on Primer Annealing
14.14 Influence on Polymerase Extension
14.15 Effects on Quantitative PCR
14.16 Effects on Digital PCR
14.17 Effects on Next-Generation Sequencing
14.18 Detection of Template Damage
Agarose Gel Electrophoresis
Spectrophotometry
Fluorometric Quantification
qPCR Integrity Assays
Capillary Electrophoresis
14.19 Removal of DNA-Binding Inhibitors
Silica Column Purification
Magnetic Beads
PVPP
Activated Charcoal
Proteinase K
RNase Treatment
14.20 Prevention of Template Damage
14.21 Emerging Technologies
14.22 Best Laboratory Practices
14.23 Chapter Summary
References
Transition to Chapter 15
Part III – Molecular Mechanisms of PCR Inhibition
Chapter 15
Magnesium Chelation and Cofactor Disruption: Biochemical Mechanisms, Sources of Chelating Agents, and Strategies for Restoring PCR Efficiency
Abstract
15.1 Introduction
15.2 Biochemical Functions of Magnesium
Catalytic activation
Nucleotide stabilization
Transition-state stabilization
Polymerase conformation
15.3 The Two-Metal-Ion Mechanism
Metal A
Metal B
15.4 Magnesium Concentration in PCR
15.5 Relationship Between Mg²⁺ and dNTPs
15.6 Chelation
15.7 Major Chelating PCR Inhibitors
15.7.1 EDTA
15.7.2 Citrate
15.7.3 Humic Acids
15.7.4 Fulvic Acids
15.7.5 Phytic Acid
15.7.6 Oxalates
15.7.7 Polyphenols
15.8 Biological Sources of Chelators
15.9 Laboratory Sources of Chelation
15.10 Consequences of Magnesium Deficiency
15.11 Consequences of Excess Magnesium
15.12 Assessing Magnesium-Dependent Inhibition
Magnesium Titration
Internal Amplification Controls
Standard Curve Analysis
Spike Experiments
15.13 Strategies to Overcome Chelation
Optimize MgCl₂ Concentration
Improve DNA Purification
Reduce Chelator Carryover
Use Inhibitor-Resistant Polymerases
Reaction Additives
15.14 Magnesium in Advanced PCR Technologies
Quantitative PCR
Digital PCR
Multiplex PCR
Long-Range PCR
15.15 Future Perspectives
15.16 Best Laboratory Practices
15.17 Chapter Summary
References
Transition to Chapter 16
Part III – Molecular Mechanisms of PCR Inhibition
Chapter 16
Primer Annealing Interference: Molecular Mechanisms, Inhibitory Compounds, Detection Methods, and Optimization Strategies
Abstract
16.1 Introduction
16.2 Principles of Primer Annealing
16.3 Factors Influencing Primer Annealing
Primer length
GC content
Melting temperature (Tm)
Ionic strength
16.4 PCR Inhibitors That Affect Primer Annealing
16.5 Template Structural Modification
16.6 DNA Secondary Structures
16.7 Primer Secondary Structures
Hairpins
Self-dimers
Cross-dimers
16.8 Ionic Disturbances
16.9 Competitive DNA Binding
16.10 Effects of Polysaccharides
16.11 Polyphenols
16.12 Humic Substances
16.13 Heavy Metals
16.14 Organic Solvents
16.15 Effects on Different PCR Technologies
Conventional PCR
Quantitative PCR
Digital PCR
Multiplex PCR
Long-Range PCR
16.16 Detection of Primer Annealing Problems
Gradient PCR
Melting Curve Analysis
Agarose Gel Electrophoresis
Primer Design Software
16.17 Optimization Strategies
Optimize Annealing Temperature
Redesign Primers
Improve DNA Purification
Increase Template Quality
PCR Additives
BSA
Betaine
DMSO
Formamide
16.18 Primer Design for Difficult Samples
16.19 Emerging Technologies
16.20 Best Laboratory Practices
16.21 Chapter Summary
References
Part III – Molecular Mechanisms of PCR Inhibition
Chapter 17
Fluorescence Signal Suppression: Mechanisms, Inhibitory Compounds, Detection Strategies, and Optimization of Real-Time PCR and Digital PCR Assays
Abstract
17.1 Introduction
17.2 Principles of Fluorescence Detection
17.3 Fluorescent Chemistries Used in PCR
17.3.1 Intercalating Dyes
Advantages
Limitations
17.3.3 Hybridization Probes
17.3.2 Hydrolysis Probes
17.4 Categories of Fluorescence Inhibitors
17.5 Optical Absorption
17.6 Fluorescence Quenching
17.7 Dye Displacement
17.8 Probe Degradation
17.9 Light Scattering
17.10 Matrix-Specific Fluorescence Inhibitors
17.11 Blood-Derived Fluorescence Inhibitors
Hemoglobin
Bilirubin
17.12 Plant-Derived Fluorescence Inhibitors
17.13 Environmental Fluorescence Inhibitors
17.14 Heavy Metals
17.15 Influence on Different Fluorescent Chemistries
SYBR Green
EvaGreen
TaqMan Probes
Molecular Beacons
17.16 Effects on Quantitative PCR
17.17 Effects on Digital PCR
17.18 Detection of Fluorescence Inhibition
Amplification Curve Analysis
Melting Curve Analysis
Internal Fluorescent Controls
Spike-and-Recovery Experiments
Instrument Calibration
17.19 Strategies to Reduce Fluorescence Suppression
Improve DNA Purification
Magnetic Bead Purification
PVPP
Activated Charcoal
Sample Dilution
Alternative Fluorescent Chemistries
17.20 Instrument Considerations
17.21 Emerging Technologies
17.22 Best Laboratory Practices
17.23 Chapter Summary
References
Transition to Part IV
Part IV – Sample Preparation and Inhibitor Removal Technologies
Chapter 18
Cell Lysis Optimization: Principles, Lysis Chemistries, Mechanical and Enzymatic Methods, and Their Role in Minimizing PCR Inhibitors Prior to DNA Amplification
Abstract
18.1 Introduction
18.2 Biological Barriers to Cell Lysis
Gram-negative bacteria
Gram-positive bacteria
Mycobacteria
Fungi
Plant Cells
Animal Cells
18.3 Principles of Effective Cell Lysis
18.4 Mechanical Cell Lysis
Bead Beating
Advantages
Limitations
Rotor–Stator Homogenization
Sonication
Cryogenic Grinding
18.5 Chemical Cell Lysis
Sodium Dodecyl Sulfate (SDS)
CTAB
Triton X-100
Tween 20
Guanidine Thiocyanate
18.6 Enzymatic Cell Lysis
Lysozyme
Proteinase K
Lysostaphin
Mutanolysin
Lyticase
Chitinase
18.7 Physical Lysis Methods
Freeze–thaw cycles
Osmotic Shock
Thermal Lysis
18.8 Matrix-Specific Lysis Strategies
18.9 Influence of Lysis on PCR Inhibitors
18.10 Protection of DNA During Lysis
EDTA
Reducing Agents
Low Temperature
RNase Inhibitors
18.11 Automation of Cell Lysis
18.12 Microfluidic Lysis Systems
18.13 Nanotechnology in Cell Lysis
18.14 Artificial Intelligence for Lysis Optimization
18.15 Troubleshooting Common Lysis Problems
18.16 Best Laboratory Practices
18.17 Future Perspectives
18.18 Chapter Summary
References
Transition to Chapter 19
Part IV – Sample Preparation and Inhibitor Removal Technologies
Chapter 19
DNA Purification Technologies: Principles, Silica-Based Extraction, Magnetic Beads, Organic Extraction, Advanced Purification Methods, and Their Role in PCR Inhibitor Removal
Abstract
19.1 Introduction
19.2 Principles of DNA Purification
19.3 Major Categories of DNA Purification Technologies
19.4 Organic Extraction
Mechanism
Advantages
Limitations
19.5 Silica Membrane Technology
Principle
Mechanism
Advantages
Limitations
19.6 Magnetic Bead Technology
Types of magnetic beads
Principle
Advantages
Limitations
19.7 Alcohol Precipitation
Advantages
Limitations
19.8 Ion-Exchange Chromatography
Advantages
Limitations
19.9 Size-Exclusion Chromatography
19.10 Nanomaterial-Assisted DNA Purification
19.11 Microfluidic DNA Purification
19.12 Removal of Specific PCR Inhibitors
19.13 Matrix-Specific Purification Strategies
Blood
Plants
Soil
Food
Wastewater
19.14 DNA Elution
19.15 Assessment of DNA Purity
Spectrophotometry
Fluorometry
Agarose Gel Electrophoresis
PCR-Based Assessment
19.16 Automation
19.17 Artificial Intelligence
19.18 Troubleshooting DNA Purification
19.19 Best Laboratory Practices
19.20 Future Perspectives
19.21 Chapter Summary
References
Transition to Chapter 20
Part IV – Sample Preparation and Inhibitor Removal Technologies
Chapter 20
RNA Purification and Removal of Reverse Transcription-PCR (RT-PCR) Inhibitors: Principles, Technologies, and Advanced Applications
Abstract
20.1 Introduction
20.2 Types of RNA
Messenger RNA (mRNA)
Ribosomal RNA (rRNA)
Transfer RNA (tRNA)
MicroRNA (miRNA)
Long Non-Coding RNA (lncRNA)
20.3 RNA Stability
20.4 RNases
20.5 Reverse Transcription
20.6 RT-PCR Inhibitors
20.7 Biological RT-PCR Inhibitors
20.8 Plant-Derived Inhibitors
20.9 Environmental RT-PCR Inhibitors
20.10 Food-Derived Inhibitors
20.11 Chemical Inhibitors
20.12 RNA Extraction Technologies
Phenol-Guanidine Extraction
Advantages
Limitations
Magnetic Bead Purification
Silica Membrane Purification
20.13 RNA Stabilization
20.14 DNase Treatment
20.15 Assessment of RNA Quality
Spectrophotometry
Fluorometry
Capillary Electrophoresis
20.16 Removal of RT-PCR Inhibitors
Silica Purification
Magnetic Beads
Additional Wash Steps
PVPP
Activated Charcoal
20.17 Reverse Transcription Optimization
20.18 Internal Controls
20.19 Applications
Viral diagnostics
Gene expression
Environmental surveillance
Food safety
20.20 Automation
20.21 Emerging Technologies
20.22 Troubleshooting RT-PCR Inhibition
20.23 Best Laboratory Practices
20.24 Future Perspectives
20.25 Chapter Summary
References
Transition to Chapter 21
Part IV – Sample Preparation and Inhibitor Removal Technologies
Chapter 21
Advanced Adsorbents and Specialized Inhibitor Removal Technologies: PVPP, Activated Charcoal, Ion-Exchange Resins, Nanomaterials, and Emerging Purification Chemistries for PCR-Compatible Nucleic Acids
Abstract
21.1 Introduction
21.2 Principles of Selective Adsorption
21.3 Polyvinylpolypyrrolidone (PVPP)
Mechanism
Applications
Advantages
Limitations
21.4 Polyvinylpyrrolidone (PVP)
21.5 Activated Charcoal
Mechanism
Compounds Removed
Applications
Limitations
21.6 Ion-Exchange Resins
Cation exchangers
Anion exchangers
Applications
21.7 Chelating Resins
21.8 Affinity Adsorbents
21.9 Silica-Based Adsorbents
21.10 Magnetic Nanoparticles
21.11 Graphene Oxide
21.12 Carbon Nanotubes
21.13 Mesoporous Silica Nanoparticles
21.14 Molecularly Imprinted Polymers (MIPs)
21.15 Matrix-Specific Adsorbent Selection
21.16 Combination Strategies
Plant tissues
Soil
Wastewater
Food
21.17 Evaluation of Adsorbent Performance
21.18 Troubleshooting Adsorbent Use
21.19 Artificial Intelligence and Smart Purification
21.20 Future Perspectives
21.21 Best Laboratory Practices
21.22 Chapter Summary
References
Transition to Chapter 22
Part IV – Sample Preparation and Inhibitor Removal Technologies
Chapter 22
PCR Optimization Strategies for Inhibitor-Rich Samples: Buffer Systems, Polymerase Selection, PCR Enhancers, and Reaction Engineering
Abstract
22.1 Introduction
22.2 Components of a PCR Reaction
22.3 Reaction Buffer Optimization
22.4 pH Optimization
22.5 Magnesium Optimization
22.6 DNA Polymerase Selection
Standard Taq Polymerase
Hot-Start Polymerases
High-Fidelity Polymerases
Inhibitor-Resistant Polymerases
22.7 Primer Optimization
22.8 Template DNA Concentration
Low DNA concentration
Excess DNA
22.9 Thermal Cycling Optimization
Initial denaturation
Denaturation
Annealing
Extension
22.10 Bovine Serum Albumin (BSA)
Mechanisms
22.11 Betaine
22.12 Dimethyl Sulfoxide (DMSO)
22.13 Trehalose
22.14 Formamide
22.15 Nonionic Detergents
22.16 Additive Combinations
22.17 Internal Amplification Controls
22.18 Multiplex PCR Optimization
22.19 Optimization for Different PCR Platforms
Conventional PCR
Real-Time PCR
Digital PCR
Long-Range PCR
22.20 Artificial Intelligence in PCR Optimization
22.21 Troubleshooting PCR Inhibition
22.22 Best Laboratory Practices
22.23 Future Perspectives
22.24 Chapter Summary
References
Transition to Part V
Chapter 23
Clinical Molecular Diagnostics: Managing PCR Inhibitors in Infectious Disease Testing, Oncology, Transplantation, and Precision Medicine
Abstract
23.1 Introduction
23.2 The Clinical Molecular Testing Workflow
23.3 Sources of PCR Inhibitors in Clinical Laboratories
Patient-derived compounds
Collection materials
Laboratory procedures
23.4 Blood-Based Molecular Diagnostics
Recommended practices
23.5 Respiratory Diagnostics
23.6 Gastrointestinal Diagnostics
23.7 Urinary Tract Diagnostics
23.8 Cerebrospinal Fluid (CSF)
23.9 Oncology Applications
23.10 Transplantation
23.11 Precision Medicine
23.12 Formalin-Fixed Paraffin-Embedded (FFPE) Tissue
23.13 Internal Quality Controls
Positive control
Negative control
Internal amplification control (IAC)
Extraction control
No-reverse-transcriptase control
23.14 Quality Assurance
23.15 Validation of PCR Assays
23.16 Interpretation of Inhibited Results
23.17 Clinical Case Studies
Case 1: Respiratory Virus Testing
Case 2: Stool Pathogen Panel
Case 3: FFPE Tumor Testing
23.18 Emerging Technologies
23.19 Best Laboratory Practices
23.20 Future Perspectives
23.21 Chapter Summary
References
Transition to Chapter 24
Part V – Application-Specific Management of PCR Inhibitors
Chapter 24
PCR Inhibitor Management in Food Microbiology: Matrix-Specific Challenges, Detection of Foodborne Pathogens, and Laboratory Best Practices
Abstract
24.1 Introduction
24.2 Major Foodborne Pathogens
Bacteria
Viruses
Parasites
24.3 Food Matrix Diversity
24.4 Meat and Poultry
Mechanisms
Recommended Extraction
24.5 Dairy Products
Challenges
Recommended Strategies
24.6 Seafood
24.7 Fruits
Recommended Strategies
24.8 Vegetables
24.9 Cereals and Grains
24.10 Spices and Herbs
Recommended Strategies
24.11 Chocolate and Cocoa
24.12 Oils
24.13 Fermented Foods
24.14 Food Processing Effects
Heat treatment
Freezing
Drying
Irradiation
24.15 Sample Enrichment
24.16 DNA Extraction
Silica membrane purification
Magnetic bead purification
CTAB extraction
24.17 Removal of Food PCR Inhibitors
Proteinase K
Lipid removal
PVPP
Activated charcoal
Additional washing
24.18 PCR Optimization
24.19 Internal Controls
24.20 Validation of Food PCR Assays
24.21 Quality Assurance
24.22 Emerging Technologies
24.23 Case Studies
Case Study 1: Ground Beef
Case Study 2: Spinach
Case Study 3: Black Pepper
Case Study 4: Raw Milk
24.24 Best Laboratory Practices
24.25 Future Perspectives
24.26 Chapter Summary
References
Transition to Chapter 25
Part V – Application-Specific Management of PCR Inhibitors
Chapter 25
PCR Inhibitor Management in Environmental Microbiology, Environmental DNA (eDNA), and Metagenomics
Abstract
25.1 Introduction
25.2 Major Environmental Sample Types
25.3 Environmental DNA (eDNA)
25.4 Soil
Recommended Strategies
25.5 Sediments
25.6 Freshwater
25.7 Marine Samples
25.8 Wastewater
25.9 Activated Sludge
25.10 Biofilms
25.11 Airborne Samples
25.12 Industrial Effluents
25.13 Metagenomic Sequencing
25.14 Environmental Pathogen Surveillance
Waterborne pathogens
Soil-associated pathogens
Environmental viruses
25.15 Removal of Environmental PCR Inhibitors
PVPP
Activated Charcoal
Magnetic Beads
Ion-Exchange Resins
Silica Purification
25.16 PCR Optimization
25.17 Internal Controls
25.18 Quality Assurance
25.19 Case Studies
Case Study 1: Agricultural Soil
Case Study 2: Wastewater Surveillance
Case Study 3: Marine Sediments
Case Study 4: River Water eDNA
25.20 Emerging Technologies
25.21 Best Laboratory Practices
25.22 Future Perspectives
25.23 Chapter Summary
References
Transition to Chapter 26
Part V – Application-Specific Management of PCR Inhibitors
Chapter 26
PCR Inhibitor Management in Forensic Science, Ancient DNA, and Archaeogenetics
Abstract
26.1 Introduction
26.2 Characteristics of Forensic Samples
26.3 Ancient DNA (aDNA)
26.4 Sources of PCR Inhibitors
Biological materials
Environmental exposure
Human activities
26.5 Bone and Teeth
Recommended procedures
26.6 Hair Samples
26.7 Touch DNA
26.8 Blood Evidence
26.9 Soil-Contaminated Evidence
26.10 Chemical Damage to DNA
Hydrolytic damage
Oxidative damage
Deamination
26.11 DNA Fragmentation
26.12 DNA Extraction
Silica-based purification
Magnetic bead purification
Organic extraction
26.13 Removal of PCR Inhibitors
26.14 PCR Optimization
26.15 Quantitative PCR Assessment
26.16 Contamination Control
26.17 Short Tandem Repeat (STR) Analysis
26.18 Mitochondrial DNA Analysis
26.19 Next-Generation Sequencing
26.20 Quality Assurance
26.21 Case Studies
Case Study 1: Outdoor Bone Recovery
Case Study 2: Ancient Human Tooth
Case Study 3: Fire-Damaged Blood Evidence
Case Study 4: Hair Shaft Analysis
26.22 Emerging Technologies
26.23 Best Laboratory Practices
26.24 Future Perspectives
26.25 Chapter Summary
References
Transition to Chapter 27
Part V – Application-Specific Management of PCR Inhibitors
Chapter 27
PCR Inhibitor Management in Veterinary Diagnostics, Wildlife Disease Surveillance, Aquaculture, and One Health Applications
Abstract
27.1 Introduction
27.2 One Health Concept
27.3 Veterinary Specimen Types
27.4 Blood Samples
27.5 Milk
Recommended workflow
27.6 Fecal Samples
27.7 Respiratory Samples
27.8 Tissue Samples
27.9 Poultry Diagnostics
27.10 Aquaculture
27.11 Wildlife Disease Surveillance
27.12 Companion Animals
Dogs
Cats
27.13 Livestock Diseases
Cattle
Swine
Sheep and Goats
27.14 Zoonotic Pathogens
27.15 Removal of Veterinary PCR Inhibitors
Proteinase K digestion
Lipid removal
Magnetic bead purification
PVPP
Additional washing
27.16 PCR Optimization
27.17 Quality Assurance
27.18 Case Studies
Case Study 1: Bovine Mastitis
Case Study 2: African Swine Fever Surveillance
Case Study 3: Fish Disease Diagnostics
Case Study 4: Wildlife Surveillance
27.19 Emerging Technologies
27.20 Best Laboratory Practices
27.21 Future Perspectives
27.22 Chapter Summary
References
Transition to Chapter 28
Part V – Application-Specific Management of PCR Inhibitors
Chapter 28
PCR Inhibitor Management in Plant Pathology, Seed Health Testing, and Agricultural Molecular Diagnostics
Abstract
28.1 Introduction
28.2 Major Plant Pathogens
Bacteria
Fungi
Oomycetes
Viruses
Phytoplasmas
Nematodes
28.3 Plant Tissues Used for Molecular Testing
28.4 Major Plant-Derived PCR Inhibitors
28.5 Polyphenols
Mechanisms
28.6 Polysaccharides
28.7 Lignin
28.8 Chlorophyll and Pigments
28.9 Essential Oils
28.10 Plant Secondary Metabolites
28.11 Seed Health Testing
28.12 Soil–Plant Systems
28.13 Nucleic Acid Extraction
CTAB Extraction
Silica Membrane Purification
Magnetic Bead Purification
28.14 Removal of Plant PCR Inhibitors
PVP
PVPP
Activated Charcoal
Proteinase K
Additional Washing
28.15 PCR Optimization
28.16 Internal Controls
28.17 Quality Assurance
28.18 Case Studies
Case Study 1: Citrus Greening Disease
Case Study 2: Potato Late Blight
Case Study 3: Wheat Seeds
Case Study 4: Grapevine Viruses
28.19 Emerging Technologies
28.20 Best Laboratory Practices
28.21 Future Perspectives
28.22 Chapter Summary
References
Transition to Part VI
Part VI – Emerging Technologies and Future Directions
Chapter 29
Next-Generation Molecular Diagnostics: Digital PCR, CRISPR-Based Detection, Microfluidics, Nanopore Sequencing, Artificial Intelligence, and Strategies to Overcome PCR Inhibition
Abstract
29.1 Introduction
29.2 Digital PCR (dPCR)
Advantages
Limitations
29.3 Why Digital PCR Is More Resistant to PCR Inhibitors
29.4 CRISPR-Based Molecular Diagnostics
Advantages
Limitations
29.5 Isothermal Amplification Technologies
29.6 Nanopore Sequencing
29.7 Microfluidic Lab-on-a-Chip Systems
29.8 Sample-to-Answer Platforms
29.9 Nanotechnology
29.10 Artificial Intelligence
29.11 Machine Learning for Inhibitor Prediction
29.12 Automation
29.13 Cloud-Based Diagnostics
29.14 Multiplex Molecular Diagnostics
29.15 Portable Molecular Diagnostics
29.16 Biosensors
29.17 Future Polymerases
29.18 Smart Reagents
29.19 Challenges Remaining
29.20 Future Research Priorities
29.21 Best Laboratory Practices
29.22 Chapter Summary
References
Transition to Chapter 30
Part VI – Emerging Technologies and Future Directions
Chapter 30
Comprehensive Laboratory Framework for Preventing, Detecting, Troubleshooting, and Overcoming PCR Inhibition: Best Practices, Quality Assurance, and Future Perspectives
Abstract
30.1 Introduction
30.2 Sources of PCR Inhibition Across the Workflow
Pre-analytical sources
Analytical sources
Post-analytical sources
30.3 Stepwise Laboratory Framework
Step 1: Appropriate Specimen Collection
Step 2: Specimen Preservation
Step 3: Matrix-Specific Extraction
Step 4: DNA/RNA Quality Assessment
Step 5: PCR Optimization
30.4 Detection of PCR Inhibition
30.5 Troubleshooting Algorithm
30.6 Quality Assurance
30.7 Validation of Molecular Assays
30.8 Documentation
30.9 Laboratory Accreditation
30.10 Biosafety and Biosecurity
30.11 Automation
30.12 Artificial Intelligence
30.13 Laboratory Training
30.14 Sustainability in Molecular Diagnostics
30.15 Emerging Technologies
30.16 Universal Best Practices for Managing PCR Inhibition
30.17 Integrated Workflow Summary
30.18 Future Perspectives
30.19 Final Conclusions
References
End of Main Text
Appendix A
Comprehensive PCR Troubleshooting Guide
A.1 Introduction
A.2 PCR Troubleshooting Workflow
A.3 Common PCR Problems
Comprehensive Bibliography (Selected References)
Cell Lysis and Nucleic Acid Purification
PCR and Molecular Diagnostics
Genomics and Sequencing
Biofilms and Microbial Ecology
Microfluidics and Point-of-Care Diagnostics
Artificial Intelligence and Future Technologies
Figure Credits
Table Credits
Subject Index
Acknowledgments
About the Author
Final Author’s Note
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