Fishing for cancer clues in fresh tissue — no sequencing machine needed

The most powerful tools for mapping what is happening inside tissue are also the most demanding: expensive instruments, sequencing machines, lengthy preparation, heavy computation. Prof. Shi Peng's team at City University of Hong Kong has offered a simpler way: a method called Spectrum-FISH that uses vertically aligned nanoneedles to lift RNA directly out of fresh tissue in a kind of molecular touch-and-go — no sequencing, no amplification, no lengthy preprocessing. Tested on fresh human colorectal biopsy specimens and mouse brain tissue, it can profile messenger RNAs, microRNAs, and RNA methylation, all mapped back to their exact locations in the tissue and individual cells. The findings, published in Nature Biomedical Engineering, point toward making this kind of spatial biology cheap and practical enough for routine pathology labs — where time-sensitive biopsies, not supercomputers, are the reality. "Innovation in biomedicine is about more than enabling measurements; it must also ensure they are practical and accessible," said Shi.