Research The Mathias Laboratory Department of Nutritional Sciences University of Connecticut Adipocyte derived glutathione promotes obesity related breast cancer by regulating the SCARB2 ARF1 mTORC1 complex: Cell Metabolism Mast cells are hypersensitive immune cells that release histamine and other inflammatory mediatorsoften in response to oxidative stress, environmental toxins, and immune imbalance. Many patients with MCAS have low levels of glutathione. Mast cells are hypersensitive immune cells that release histamine and other inflammatory mediatorsoften in response to oxidative stress, environmental toxins, and immune imbalance. Many patients with MCAS have low levels of glutathione.