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7.9.2 Articial Intelligence inDrug Delivery Optimisation
The combination of AI and drug delivery has transformed this eld. AI algorithms analyse large amounts of data, considering patient-specic variables, drug kinetics, and dynamics. This data-driven method supports in the design of personalised drug delivery regimens for specic patients, optimising dosage, timing, and formulation. AI-powered platforms increase treatment outcomes and patient experiences, signal­ling a paradigm shift in the personalisation of DDSs.
7.9.3 Stimulus-Triggered Drug Release Systems
Stimulus-triggered drug release systems are an advanced technique to targeted drug delivery. These systems are responsive to external stimuli like light, magnetic elds, even ultrasound, allowing medicinal drugs to be released on demand. This level of control improves drug delivery precision, allowing clinicians to strategically sched­ule and localise treatment, optimising therapeutic effects (Park 2016).
7.10 Future Developments andEmerging Technologies
The future of biotechnology is marked by transformative trends and emerging tech­nologies. Advances in CRISPR technology promise precise genetic engineering, while synthetic biology opens avenues for creating synthetic organisms. Articial intelligence is revolutionising drug discovery, enabling personalised medicine based on individual genetic proles. Advanced bioprocessing techniques and nanomedi­cine applications are enhancing bioproduction and targeted medical interventions. Microbiome manipulation, 3D bioprinting, and environmental biotechnology solu­tions contribute to health and sustainability. Neurotechnology advancements hold promise for addressing neurological disorders. Interdisciplinary collaborations drive these innovations, shaping a dynamic landscape for the future of biotechnology.
7.10.1 Biodegradable Implants
Biodegradable implants are an advanced technique in medical technologies that are designed to degrade naturally within the body over time. Biocompatible materials are frequently used in these implants, which gradually degrade into harmless byproducts by enzymatic or hydrolysis processes. This controlled breakdown works in parallel with the recovery process, helping throughout critical stages of tissue regeneration.
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Traditional drug delivery routes such as oral, transdermal, rectal, parenteral, and nasal techniques provide benets such as convenience of administration and systemic effects. On the other hand, each route has its own set of challenges. Oral administration encounters problems such as acidity in the gastric tract, hepatic metabolism, and the growth of microbes that can cause absorption concerns, especially in chronic conditions that require regular dosage (Liu et al. 2017). Although parenteral methods provide excellent absorption, they are invasive and can result in poor patient compliance (Vhora etal. 2021). Transdermal patches can address some concerns; however, they encounter barriers such as the stratum corneum. The requirement for several daily doses causes difculties for chronic conditions (Jeong etal. 2021). Implants with regulated drug release avoid these challenges by assuring sustained drug concentrations, providing a promising alternative for improved treatment outcomes in a patient-friendly way (García­Estrada etal. 2021).
Biodegradable implants have numerous applications in biotechnology. They are employed in orthopaedics for bone xation, ultimately paving the way to regener­ated tissues. Biodegradable polymers act as carriers in drug delivery, releasing ther­apeutic substances in a regulated manner. Biodegradable cardiovascular stents assist blood arteries during healing and gradually disintegrate, reducing long-term conse­quences. These implants reduce the number of procedures required to eliminate non-biodegradable devices, improving patient compliance. Implants provide supe­rior safety, improved bioavailability, a controlled delivery rate, improved permeabil­ity, and minimal toxicity (Sharma etal. 2021). Examples of these biodegradable implants include drug-eluting stents, tissue engineering scaffolds, pacemakers, car­diac valves, or ocular implants (Johnson etal. 2021).
Ritasert®, an FDA-approved ocular insert intended to treat chronic uveitis, incor­porated polyvinyl alcohol as a polymer for sustaining drug delivery. This device can provide drug delivery for up to 3years. Similarly, PMMA-based implants are fre­quently used in bone-related scaffolds for joint replacement procedures to enable sustained drug delivery. Bioinspired cardiac valves were 3D printed after being cre­ated with silicone to serve as a polymeric agent. Under physiological heart condi­tions, the invitro data revealed good hemodynamic function of the heart valves. These implants can be made of biodegradable or non-biodegradable polymers. Implantable drug delivery devices have numerous applications, including disease detection, treatment, regenerative therapies, and preventive therapies (Chavda etal. 2022).
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7.10.2 Articial Intelligence inDrug Delivery
Articial intelligence (AI) is transforming drug delivery by improving preci­sion, efciency, and personalised treatment techniques. A major application is predictive modelling, which employs machine learning algorithms (MLA) to analyse large datasets to forecast drug behaviour, formulation consequences,
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and patient responses. This helps to improve the design of focused drug delivery systems. AI is especially important in personalised medicine, where it is used to customise drug delivery techniques to specic patient proles by utilising genetic, genomic, and clinical data. With AI-driven platforms discovering pro­spective candidates and optimising formulations, the future of AI in the admin­istration of drugs holds promise for faster drug development. This game-changing technology is expected to improve the precision and efcacy of DDSs, introduc­ing a new era of personalised and effective therapies. Examples of AI used in drug delivery are:
IBM Watson to support Drug Discovery: Uses AI to analyse various biomedical data sources to identify drug candidates more efciently. When domain annotators are applied to massive volumes of unstructured data using IBM Watson technology, the processing speed extracts molecules, genes, and drugs from hundreds of thou­sands of scientic papers and patents in hours. Human collection of this information would most likely take much longer. Annotators’ information gathered from hun­dreds of millions of pages of text can subsequently be assembled into a wide range of runtime analytics including visualisations (Chen etal. 2016).
Atomwise: Uses AI to predict their afnity for binding of tiny compounds to specic therapeutic targets, hence speeding up drug discovery. Atomwise serves as an AI drug discovery startup that has created the AtomNet platform, which uses deep learning algorithms for identifying potential drug candidates. They announced the identication of many molecules with potential anti-disease activity in 2019, such as Ebola, cystic brosis, and multiple sclerosis. Certain chemicals are now being tested to see if they have the potential to be novel therapies for certain disor­ders (Anusha etal. 2023).
Benevolent AI: Uses AI to optimise therapeutic efcacy through drug discovery and repurposing. Analyse scientic research sets of data, then generate unique insights by forming and qualifying hypotheses (Narayanan etal. 2022).
Tempus (A Vast Data Library for Personalised Healthcare): Uses AI to analyse clinical and genomic data to provide personalised cancer treatment plans, includ­ing drug delivery optimisation. To personalise healthcare treatments, Tempus uses AI to lter through the world’s largest database of clinical and biological data. The company is developing AI technologies that collect and analyse data in areas that range from the sequencing of genes to image recognition, allowing physicians to have a better understanding of treatments and cures. Tempus is presently applying AI-powered data to cancer investigation and treatment (Mohd 2022).
BERG Health: (Using AI to treat rare diseases): BERG acts as a clinical-stage, AI-powered biotech platform that diagnoses diseases to rapidly accelerate up the research and development of new treatments. BERG can develop stronger product candidates for rare diseases by integrating its “Interrogative Biology” method with standard R&D. BERG recently announced their research on the treatment of Parkinson’s disease. They employed AI to discover previously discovered interac­tions among chemicals in the human body (Mohd 2022).
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7.10.3 Exosome-Based Therapies
Exosome-based therapies are a novel approach to drug delivery in the eld of bio­technology. Exosomes, composed of microscopic extracellular vesicles released by cells, are essential for intercellular communication. Their specic characteristics, including stability, biocompatibility, and the capacity to cross biological barriers (BBB), make them ideal drug delivery candidates. Exosomes are expected to revo­lutionise drug delivery in following ways in the future of biotechnology: They are natural drug carriers that encapsulate therapeutic payloads such as proteins and nucleic acids, providing a biocompatible framework for drug administration (El Andaloussi etal. 2013). Engineered exosomes improve specicity and reduce off­target effects, allowing for precise drug delivery. Their use extends to facilitating the transport of nucleic acid medication to target cells, including RNA interference or even gene editing tools, demonstrating versatility in biotechnological treatments (Alvarez-Erviti etal. 2011). Exosomes, specically, can cross biological barriers, such as the formidable BBB, thereby improving drug delivery to targeted organs. Furthermore, by controlling the immune response, their immunomodulatory actions lead to improved treatment results, increasing their prospective applications. As the eld of drug delivery continues to develop, continuing research efforts are centred on realising the maximum potential of exosomes over precise and personalised drug administration, providing new solutions to conventional difculties (Pitt etal. 2017).
Exosomes high in MHC-II were produced by transfecting murine melanoma cells with the CIITA gene, which resulted in an overexpression of MHC-II at their sur­faces. This is an example of how designer exosomes are used immunotherapeutically. The modied exosomes were then directed at T cells, where they improved the type 1 T-helper cells response against cancer cells. As a result, the modied exosomes’ enhanced MHC-II molecule served as both a targeting peptide and a therapeutic drug (Lee etal. 2011). Alternatively, to drive exosomes towards T cells, an antibody with a light chain can be added to the exosomal surface (Raposo and Stoorvogel 2013). Curcumin-loaded exosomes have been investigated as potential means of drug deliv­ery for Parkinson’s disease therapy. Haney etal. (2015) have demonstrated the usage of naturally occurring anti-inammatory chemicals encapsulated within exosomes (Kim etal. 2016; Haney etal. 2015). Researchers aimed to overcome multidrug resis­tance (MDR) in cancer cells by designing exosomes that contained doxorubicin, demonstrating their utility as anticancer drug carriers (Kim etal. 2016).
7.10.4 Synthetic Biology Approaches
The use of modied microbes in drug delivery is a cutting-edge strategy with sig­nicant future applications in the discipline of biotechnology. Synthetic biology approaches allow microorganisms to be modied to serve as sophisticated carriers for medicinal payloads. These genetically modied bacteria can be designed to navigate complicated biological surroundings, target specic tissues, and even
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release therapeutic chemicals in a controlled way. This novel approach has tremen­dous potential for facilitating the development of very precise and effective medica­tion delivery systems. Biotechnology applications can include the targeted administration of drugs, biological products, or gene treatments for a variety of medical problems. Current advances in synthetic biology are projected to rene and increase the potential of engineered microbes, changing the future panorama of drug delivery across biotechnology (Callura etal. 2012).
The natural evolution of living organisms has resulted in the formation of increas­ingly sophisticated natural genetic networks for sensing the environment and responding advantageously. As a result, many synthetic biologists anticipate using this strategy to utilise the complexity of cells to create programmed therapeutic cells that are capable of independently controlling and regulating both intrinsic (that are located within cells) and extrinsic (located outside cells) signals to ght disease. To achieve this goal, there are three signicant initiatives underway in the eld of syn­thetic biology, which involve engineering cells to:
Function as sensors, sensing and reporting the availability of specic molecules that can differentiate among states of cells (i.e. healthy vs. diseased/damaged).
Perceive a specic molecule or cell state and responding by generating a con­trolled dosage of therapeutic biological molecules.
Function in different delivery platforms (Muldoon etal. 2021).
The key difference between synthetic biology and molecular biology is the fact that synthetic biology assembles components from molecular biology (for example, repressor proteins) to create innovative genetic frameworks that execute complex activities. Dynamic gene expression, rewiring endogenous pathways to generate biomolecules, controlling the number of cells, reporting on the condition of various surroundings, and executing Boolean logic operations are among these functions (MacDonald and Deans 2016).
Controlling gene expression reliably is critical in synthetic biology for develop­ing functioning genetic circuits inside cells. These circuits can work independently or in conjunction with existing biological networks. For independent functioning, genetic circuits are frequently engineered to exist orthogonal to their host, to ensure the regulatory control components are distinct from the host signalling pathways. The integration of Boolean logic gates within these circuits enables exact control over time, duration, and functionality, which is made possible by specic triggered inputs. Various research techniques in molecular biology or genetic engineering act as modular elements for synthetic biologists. These methods are critical for building genomic circuits that allow sophisticated regulation of cell function, thereby advanc­ing synthetic biology (MacDonald and Deans 2016).
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7.10.5 3D Printing ofDDSs
3D printing advances are revolutionising DDSs by enabling the fabrication of per­sonalised and extremely precise dose forms. This method enables healthcare formu­lations to be tailored to individual patient needs, considering parameters like age,
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weight, and unique medical problems. Layer-by-layer application of pharmaceuti­cal ingredients is used to construct complicated structures, allowing for unparalleled management of the design and content of drug delivery systems. By optimising drug release proles and boosting bioavailability, this customisation improves patient compliance and overall therapeutic results. The adaptability of 3D printing for the administration of medications demonstrates an evolutionary change towards per­sonalised treatment, providing a promising path for medicines in the future (Chia and Wu 2015).
3D printing enables the production of DD devices with varying geometries and/ or customised drug release characteristics, which are difcult to create using tradi­tional drug manufacturing procedures. The DDS design, as well as the choice of polymers and their combinations, can inuence drug release kinetics. Dosing in the printed DDS can be changed to meet the demands of the patient by adjusting the size of the printed formulations and changing the composition of the solid material(s). The ability and versatility of the 3D printed DDS to independently tune the drug delivery of numerous pharmaceuticals make it suited for patient groups that require multiple drugs at the same time, such as individuals with metabolic ill­nesses. Designing formulations containing complicated inner structures and com­partmentalised matrix systems could yield these DDS (Khaled etal. 2015).
Aprecia® Pharmaceuticals, which was created in 2003, was the rst pharmaceutical business to introduce a 3D printed healthcare product. ZipDose® Technology was developed in 2008 as a patented 3D printing process primarily for producing high-dose and easy-to-swallow product for central nervous system therapies. GlaxoSmithKline (GSK) and other pharmaceutical companies have showed interest in this subject as well. Printing techniques have already been investigated for the generation of high­throughput screening matrices for drug screening and testing. Pharmaceutical and printing rms are collaborating to create more affordable and personalised healthcare solutions in the future. Furthermore, 3D printed human skin and organs provide a via­ble alternative to animal testing for cosmetic and biological research. Apart from 3D printing technologies, 2D printing technologies such as inkjet as well as exographic printing have also been used in the pharmaceutical industry. Flexography makes use of rotary-type contact printing technology, whereas inkjet printers are non-contact sys­tems based on ongoing or drop-on-demand jetting technologies (Palo etal. 2017).
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7.11 Challenges andLimitations Associated withCurrent
Drug Delivery
7.11.1 Bioavailability
Bioavailability challenges involve addressing concerns such as low drug solubility as well as degradation. Innovative formulations, such as nanoparticle-based systems and prodrugs, are critical in enhancing drug absorption and systemic distribution, ultimately increasing bioavailability.
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7.11.2 Immunogenicity
Immunogenicity is a problem in biologic therapies because the immune response of the body might affect the effectiveness of therapeutic agents. A signicant focus is on strategic drug design, which includes adjustments to minimise immunogenicity. This comprises structural changes as well as the application of immunomodulatory drugs to extend biologics’ therapeutic lifetime.
7.11.3 Non-specic Distribution
Non-specic drug distribution can result in undesirable adverse effects. Off-target effects are minimised using advanced drug delivery technologies like liposomes and targeted formulations. However, improving these systems to facilitate accurate tar­geting along with controlled release is still a difculty in drug delivery studies. Addressing these issues collectively is critical for improving DDSs and patient out­comes (Vizirianakis 2004).
7.11.4 Safety Concerns
The progress of DDSs in biotechnology creates new obstacles and ethical concerns. As novel techniques, such as nanotechnology and precision delivery methods, become fundamental to biopharmaceutical research, safety issues take centre stage. These technologies’ complicated interactions with biological systems raise con­cerns about potential toxicity, its immunogenicity, and long-term impacts. As bio­technological DDSs affect cells and molecules, it is essential that their safety and biocompatibility be ensured. Ethical considerations include issues such as informed consent, which is especially important in the context of developing medicines such as gene editing and personalised medicine. Establishing a balance between expand­ing boundaries of biotechnology while protecting patient well-being necessitates thorough risk assessments, close monitoring, and constant ethical debate among the biotechnological and healthcare communities (Orive etal. 2003).
7.12 Conclusion
Biotechnology’s dynamic eld of drug delivery has made great progress, bringing cutting-edge approaches to healthcare concerns. Nanotechnology, liposomal nano­technology, and TDD emerge out as powerful techniques that have the potential to revolutionise therapeutic precision and efcacy. The adaptability of liposomal
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nanotechnology extends to therapies for cancer, diagnostics, and cosmeceuticals, whereas incorporated NPs improve absorption and permit controlled release. With the emergence of AI, exosome-based medicines, and synthetic biology, the future holds enormous promise. These breakthroughs herald a new era of personalised and targeted interventions, with applications ranging from cancer therapy to genetics circuit regulation. However, this changing landscape raises important problems and ethical concerns, emphasising the importance of continual safety assessments and shared ethical debate. In the future, continued research and development will be essential for achieving all that is possible with these technologies. Addressing prob­lems, improving safety protocols, as well as exploring new applications will drive the next wave of biotechnological drug delivery achievements. Researchers, physi­cians, ethicists, and regulators shall collaborate to design a healthcare future in which these technologies play a critical role in providing individualised and effec­tive therapies for various healthcare-related diseases.
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