Synthetic biology includes the design, construction, and redesign of biologically based components, systems, and natural biological systems for various applications. Over recent decades, significant progress has been achieved in crafting delicate biocircuits, standardizing biological building blocks, and developing various genomic/metabolic engineering tools and approaches.
Recognized for its transformative potential, synthetic biology has emerged as a technology poised to revolutionize various industries, including pharmaceuticals. Areas, where synthetic biology can be used, include integrating heterologous pathways into designer cells to streamline the production of medical agents, enhancing yields of natural products in cell growth media to equal or exceed those obtained from traditional sources, and pioneering novel genetic circuits for targeted tumor therapies. Synthetic biology is also driving innovations in controlled drug release systems, tailored to respond to specific biomarkers, thereby enhancing treatment efficacy for diseases such as diabetes and cancers. Additionally, new strategies are being devised to tackle complex immune disorders, infectious diseases, and metabolic disorders that pose challenges for conventional treatment approaches.
Synthetic Biology - The Principles
Synthetic biology involves dismantling and reassembling biological cells and processes to create innovative systems. This process begins with the encoding of designs by deoxyribonucleic acid (DNA), which serves as the blueprint for biological parts. These biological parts, or bioparts, are then combined to form devices, which are subsequently integrated into biological systems.
Though a diverse field, synthetic biology can broadly be divided into two main approaches: bottom-up and top-down methodologies. Bottom-up approaches aim to create artificial life from scratch, while top-down approaches leverage known biology to design systems for specific tasks. The latter approach involves designing metabolic and signaling pathways within cells to achieve desired objectives.
The advancements in DNA sequencing and synthesis technologies, coupled with insights from systems biology, have fueled the growth of synthetic biology. However, the emergence of RNA therapeutics has sparked interest in harnessing the unique attributes of RNA molecules. RNA-based systems, constructed using diverse libraries, offer enhanced safety profiles compared to DNA-based systems, making them suitable for therapeutic applications with stringent safety standards. Additionally, RNA-based systems exhibit rapid action, as they do not require transcription.
Working process in synthetic biology - Design, Build, Test, and Learn
Working process in synthetic biology follows an iterative cycle of Design, Build, Test, and Learn. Design stage, the first stage, involves developing detailed computer models and conducting extensive in silico testing. Comparing early simulations with real-world performance in the Build stage highlights differences, which are then explored in the Test stage to gain new insights. These insights can be used to modify and refine the subsequent Design stage, perpetuating a cycle of iterative improvement until the desired biological outcome is achieved.
Critical to the construction of biological devices and systems is the compatibility and ease of assembly of bioparts. Ensuring that bioparts can seamlessly integrate as modules with minimal optimization is imperative for successful implementation.
Bioparts, devices, and biological systems need a cellular environment for functionality. In synthetic biology, the cellular environment can be furnished by a standardized component known as the chassis. Serving as the 'hardware' of synthetic biology, the chassis provides the energy required to operate synthetic systems, while bioparts and biological devices function as the 'software'. Escherichia coli (E. coli) has historically served as the model organism due to its well-established characteristics and is hence the go-to chassis for synthetic biology. However, alternative chassis organisms such as Bacillus subtilis (B. subtilis) and yeast, such as S. cerevisiae, are also utilized based on s...
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