Luminal proteins and toxins

Luminal proteins and toxins refer to a diverse group of substances found within the gastrointestinal tract that contribute to various disease states through local irritation or systemic absorption. This category encompasses bacterial toxins (such as Clostridioides difficile toxins A and B), dietary antigens (such as gluten), and metabolic waste products (such as uremic toxins and bile acids). These substances are targeted by non-absorbed therapeutic agents, primarily oral adsorbents and sequestrants, which act by physically binding or sequestering these molecules to prevent their pathological effects. For example, drugs like sevelamer and AST-120 are used to manage hyperphosphatemia and uremia by binding phosphate and uremic toxins, respectively, while others like cholestyramine can neutralize bacterial toxins. Because these agents remain in the gut lumen and are not absorbed into the bloodstream, they offer a unique therapeutic approach but may also lead to non-specific binding of nutrients and other medications.

Other names

Gastrointestinal luminal toxinsIntestinal antigensGut-derived toxinsLuminal substancesEnterosorbents

Adsorption, sequestration, or enzymatic degradation of proteins and toxins within the gastrointestinal lumen.