Is it possible that Helicobacter pylori (Gm neg) can exacerbate or cause RA? Infx of gastric epithelial cell line w/ H. pylori upregulated the expression of PAD4 and increased PAD4 activity, leading to Helicobacter pylori-induced citrullination? https://t.co/QeE3SmWLLp https://t.co/ZG2tYmdJNx