In biomedical contexts, a biomarker, or biological marker, is a measurable indicator of some biological state or condition. Biomarkers are often measured and evaluated using blood, urine, or soft tissues to examine normal biological processes, pathogenic processes, or pharmacologic responses to a therapeutic intervention. Biomarkers are used in many scientific fields.

In the present book, ten typical literatures about biomarker published on international authoritative journals were selected to introduce the worldwide newest progress, which contains reviews or original researches on biomarker. We hope this book can demonstrate advances in biomarker as well as give references to the researchers, students and other related people.