Carlos Solis
Predicting the future can feel pointless, but it’s hard not to imagine where medicine might be in a few decades when we already see the start of bold experiments and new technologies.
Nanomedicine: when nanoparticles treat us from the inside
Nanotechnology works at the scale of nanometers — billionths of a meter. For comparison, a human hair is about 80,000 to 100,000 nanometers thick.
The sci-fi image of tiny surgeons swimming through our blood is catchy, but real nanomedicine is more practical: it exploits unique physical and biological properties that appear at extremely small scales. That lets doctors deliver drugs straight to the problem area, which reduces side effects and lowers the chance that the immune system destroys the therapy before it reaches its target.
Modern “designer” molecular medicine already counts as nanotechnology — think of mRNA used during the COVID-19 pandemic. But the field’s applications go far beyond vaccines and are only starting to roll out.
One expected breakthrough is getting past the blood–brain barrier, which blocks most drugs from reaching the brain. Encapsulated in specially designed nanoparticles, medicines could cross that barrier and act directly on brain diseases. Similarly, nanotech could steer chemotherapy so it attacks tumors while sparing healthy tissue.
Nanomaterials can also improve imaging: injecting iron-oxide nanoparticles into specific regions can boost MRI contrast. Nano-surgeons won’t appear overnight, but combining nanotechnology with emerging metamaterials will enable increasingly delicate procedures at the nanoscale.
Your digital doctor and digital twin
It sounds like a new kind of deepfake, but a digital twin could reshape medicine. Unlike ordinary computer simulations, a digital twin receives real-time data from its human counterpart, so it reflects what’s actually happening more accurately.
The idea started at NASA and then spread to other industries. One digital twin can monitor a nuclear power plant and predict problems to prevent accidents. In medicine the promise is bigger: our watches and other devices already track heart rate and blood pressure, and a digital twin could analyze that stream of data, spot worrying trends, and “visit” a doctor on our behalf before we notice symptoms.
Roger Highfield, co-author of Virtual You, writes that simulations are already widely used in drug development and will become even more common, creating genuinely personalized, predictive medicine. Hundreds of digital twins for a single patient could model that person’s virtual future and the long-term effects of treatments or lifestyle changes. The most advanced twins may be available to researchers or wealthy users, but simpler versions will let everyone benefit from better prevention.
CRISPR and editing our genome
Tools for precise edits to the genome already exist — CRISPR is one of them. In 2015 Chinese scientists applied CRISPR to human embryos in an attempt to fix a gene that causes beta-thalassemia. Those embryos were not viable, and the procedure failed in most of the 86 embryos, which raised a host of ethical and safety concerns.
Researchers have also explored CRISPR to treat viral and bacterial infections and various cancers. Clinical trials began appearing after 2019, but both technical and ethical obstacles stand in the way of widespread use.
Nessa Carey, author of Hacking the Code of Life, predicts: “By 2050 gene editing will probably become relatively routine for treating inherited diseases and some other conditions, such as certain cancers. I expect embryos will be edited in families with hereditary disorders when no effective alternatives exist. The technical problems will be solved faster than the ethical ones, but it will be hard to justify denying such a chance to desperate families.”
Adapted from BBC Science Focus
