Abstract

Biosensors are used for detection of cancer and diseases; and are the potential contributors and great promising tools for the treatment of cancer due to its sensitivity, reliability, and low cost. Protein biomarkers, protein profiles, post-translation modifications, and gene expression changes are some of the important molecular notations that paved a new path for the development of biomarkers and biosensors. The different types of biosensors are affinity biosensor, amperometric biosensor, catalytic biosensor, DNA biosensor, electrochemical biosensor, graphene-based biosensor, mass change biosensor, metabolism biosensor, microbial biosensor, miRNA biosensor, optical biosensor, and many more. Biosensors work based on the recognition of elements, signal transduction, and its biological response. Biosensors can be used for early detection of cancer, cardiac disease, diabetes, and many infectious diseases. This chapter will discuss about the biomarkers used for cancer, trending biosensors, applications of biosensors, and the role of biosensors for early detection of gastrointestinal cancer.

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