One author of the study was part of a group [4] that showed that metabolic acidosis induced by hydrochloric acid and lactic acidosis added to culture media of RAW 264.7 cells have opposite effects: hydrochloric acid at a pH of 7 seems essentially pro-inflammatory (nitric oxide level, IL-6/IL-10 ratio, NF-κB DNA binding), whereas lactic acidosis is essentially anti-inflammatory. The gene discussed is IL6; the disease is lactic acidosis.