10.1: Principles of Medical Biotechnology

Introduction

Medical biotechnology is the branch of biotechnology that focuses on using living cells, cell materials, and biological processes in order to develop products and technologies that help prevent, diagnose, and treat diseases. It's an area where biology, medicine, and technology come together to improve human health.

As scientists began to understand biological systems, they began to use them to develop new diagnostic tools and therapeutic strategies. With time, the field of medical biotechnology began to emerge. Key aspects of medical biotechnology include:

1. Production of medicines and vaccines: uses genetically-engineered organisms, such as bacteria or yeast to produce therapeutic compounds like drugs, hormones, antibodies and vaccines
2. Gene therapy: treats genetic diseases by repairing, replacing, or modifying faulty genes inside a patient’s cells
3. Tissue engineering and regenerative medicine: grows artificial tissues and organs in the lab to replace damaged ones
4. Diagnostic tools: develops advanced biotech-based tests to quickly and accurately detect diseases
5. Personalized medicine: tailors medical treatments based on an individual’s genetic profile to maximize effectiveness and minimize side effects

In many cases, medical biotechnology can lead to more cost-effective treatments and diagnostics compared to traditional methods. However, medical biotechnology raises numerous ethical concerns. For example, ethical debates surround the long-term effects of gene therapy, as well as the potential for modifying the human germline. Concerns about the use of genetic information and patient privacy also have been raised. There are many people who are worried about ensuring equitable access to new biotechnology-based treatments and diagnostics, particularly in underserved populations. How can someone who is economically disadvantaged afford the high costs of tech treatments created using medical biotechnology? Despite these concerns, it is hard to deny that medical biotechnology has revolutionized the medical field and improved human health.

Principles of Medical Biotechnology

Medical biotechnology relies on the manipulation of biological systems at both the molecular and cellular level so that the resulting treatments are effective, safe, and ethical. To do so, medical biotechnology uses the following (Figure \(\PageIndex{1}\)):

1. Genetic Engineering: the manipulation of DNA to alter the genetic material of an organism
   • involves the use of recombinant DNA technology
   • often used to insert health genes in order to correct genetic disorders
   • e.g., the production of hormones using genetically modified bacteria
   • to read more about genetic engineering, go to Chapter 4: Genetic Engineering and Recombinant DNA Technology
2. Cell Culture Technology: the growth of cells outside of their natural environment in controlled settings, used for research, vaccine production, and regenerative medicine
   • can include the use of stem cells or organ culture
   • to read more about cell culture, go to Chapter 6: Cell Culture Fundamentals
3. Molecular Diagnostics: uses molecular biology techniques to detect genetic mutations, pathogens, or diseases at the molecular level
   • includes areas such as next generation sequencing, microarrays, and PCR
   • to learn about PCR, go to Chapter 3.2: Replication of DNA
   • to read more about DNA sequencing, go to Chapter 5.3: Genome Sequencing
4. Biomanufacturing: the production of biological products such as vaccines, therapeutic proteins, and antibodies on a large scale using living systems like bacteria, yeast, or mammalian cells
   • to read more about biomanufacturing, go to Chapter 11.2: Bioprocess Engineering
5. Immunotechnology: engineers the immune system for the treatment or prevention of diseases
   • e.g., developing monoclonal antibodies for cancer therapy
   • e.g., CAR-T cell therapy
6. Bioinformatics: the application of computational tools to understand biological data, such as analyzing gene sequences or modeling biological processes
   • includes areas such as genomics, proteomics
   • to read more about genomics, proteomics, and bioinformatics, go to Chapter 5: Genomics and Proteomics
7. Ethical and Regulatory Compliance: ensures that biotechnology applications meet ethical standards and are approved by regulatory authorities
   • includes regulatory organizations like the FDA and compliance procedures, such as GMP

Glossary

Bioinformatics - an interdisciplinary field that combines biology, computer science, mathematics, and statistics to analyze and interpret biological data

Biomanufacturing - the production of biological products, such as vaccines, therapeutic proteins, or enzymes using living cells or organisms in industrial settings

Cell Culture - a laboratory technique used to maintain and/or grow eukaryotic cells in vitro; usually refers to mammalian cells

Genetic engineering - the direct modification of an organism’s DNA using biotechnology; often done to introduce new traits, to improve resistance to disease, or to produce beneficial products

Immunotechnology - the use of immune system-based tools and techniques for diagnostics, vaccine development, and treatment of diseases

Molecular diagnostics - techniques used to detect and measure specific genetic material or proteins in a sample in order to diagnose diseases at the molecular level