A New Microscope Could Unveil the Root Cause of Crohn’s and Other Bowel Diseases

More than half a million people in the United Kingdom are living with inflammatory bowel disease (IBD), and the number is climbing, especially among those aged 15‑40 – a period that should be about university, first jobs and relationships, not chronic gut pain.

Enter “Curie”, a bespoke microscope that looks nothing like the shiny, clunky devices you might picture in a sci‑fi film. Housed in a plain black case with a tangle of grey hoses, it sits quietly in the Rosalind Franklin Institute at Harwell, but under its modest exterior lies technology that pushes the limits of optical imaging.

Curie works at roughly ten times the resolution of ordinary light microscopes, meaning it can resolve structures as small as 20 nanometres – about the width of a few atoms lined up side by side. It achieves this through stimulated emission depletion (STED) microscopy, the very technique that won the 2014 Nobel Prize in Chemistry. In practice, researchers first tag a cellular feature with a fluorescent dye, then hit it with a doughnut‑shaped laser that switches off fluorescence everywhere except the tiny centre of the doughnut. The result is a brilliantly sharp picture of something previously blurred beyond recognition.

“What this technology can bring is a deeper understanding of the mechanisms behind IBD,” says Dr Karina Pombo‑Garcia, group leader at the institute. “We have treatments, sure, but they’re not as targeted as they could be because we still don’t fully grasp what’s going wrong at the microscopic level.”

Adding to its prowess, Curie is equipped with deformable mirrors that compensate for optical distortions, letting scientists peer deeper into thick tissue samples and even miniature organoids. A temperature‑controlled stage keeps living cells at body‑like conditions, so what you see is as close to life as a microscope can get.

PhD student Dimitrios Ioannidis is already putting Curie to work, mapping how protein complexes line the gut and form protective barriers. By comparing the architecture of these complexes in healthy fetal tissue versus adult diseased samples, he hopes to pinpoint where the system goes awry. “If the structure changes, the function changes,” he explains, “and that might be the key to the ‘root cause’ of Crohn’s and ulcerative colitis.”

The unveiling of Curie was timed with a hefty new government investment: £67 million for the Rosalind Franklin Institute and £95 million for the Henry Royce Institute, both streamed through UK Research and Innovation’s core budget. It arrives at a precarious moment, too – other national facilities are facing steep cuts, and there’s growing anxiety that vital research infrastructure could be jeopardised.

Still, ministers stress that flagship sites like the Diamond Light Source and the ISIS Neutron and Muon Source will continue to receive strong support. For researchers on the ground, the real excitement is tangible – a tool that finally lets them watch the gut’s tiniest building blocks dance in real time, perhaps ushering in a new era of precision medicines for the millions plagued by IBD.