thebiostories

🌏 Available in: English | 한국어 An Australian Discovery Reveals a Dysregulated Immune Pathway in Acute Rheumatic Fever How a Common Infection Can Lead to Lifelong Heart Disease Every year, hundreds of millions of people are infected with Group A Streptococcus (GAS). For almost everyone, it is a routine infection that disappears within days. But for a small number of people, the real disease begins only after the bacteria are gone. Years later, their immune system continues attacking the heart, eventually causing permanent valve damage known as rheumatic heart disease. Why does this happen? In 2018, Australian researchers reported a discovery in Circulation that provided a new piece of the puzzle, revealing an immune pathway that may help explain why inflammation persists long after the initial infection has resolved. Molecular Mimicry: When Immune Cells That Fight Bacteria Turn Against the Heart For decades, scientists believed that molecular mimicry was the primary mechanism under...

🌏 Available in: English | 한국어 Peter Doherty and the Theory That Made It All Make Sense Australian immunologist Peter Doherty is one of the country's most famous scientists — a Nobel laureate, former Australian of the Year, and these days a familiar public voice on pandemics and infectious disease. But his defining scientific contribution, the one that earned him a share of the 1996 Nobel Prize in Physiology or Medicine, is a beautiful example of how a strange, unexpected experimental result can force an entire field to rethink its basic assumptions — and how that rethink only made sense in light of an even older idea: clonal selection . A Puzzling Result in Mice In the early 1970s, Doherty was working at the John Curtin School of Medical Research in Canberra alongside Swiss immunologist Rolf Zinkernagel , studying how mice fight off a virus called lymphocytic choriomeningitis virus (LCMV). Their experiment was conceptually simple: take immune cells called cytotoxic T cells ...