KRAS and neoplasm: A group from Germany reported that K-ras-dependent development of intestinal cancer in a mouse model was increased by high fat diet(HFD); intriguingly, the simple transplant of feces from HFD mice with tumours into tumour-free mice was sufficient to increase tumour development, and this could be blocked by antibiotic treatment or by oral supplementation with butyrate (a short-chain fatty acid previously demonstrated to modulate gut flora) [91].