Cortisol metabolism via microbial enzymes

Cortisol metabolism via microbial enzymes refers to the biochemical transformation of host-derived glucocorticoids by the gut microbiota, a process that significantly impacts systemic hormone levels and disease states [1, 3]. The primary molecular components of this pathway include enzymes such as steroid 17,20-desmolase (DesAB), 20α-hydroxysteroid dehydrogenase (DesC), and 21-dehydroxylase, predominantly found in commensal bacteria like Clostridium scindens and Eggerthella lenta [4, 6]. These enzymes convert cortisol into bioactive metabolites, such as 11-oxy-androgens (e.g., 11β-hydroxyandrostenedione) and 21-deoxycortisol, which can drive the progression of castration-resistant prostate cancer, polycystic ovary syndrome (PCOS), and hypertension [5, 8, 10]. Furthermore, microbial enzymes like the OsrABC complex can degrade synthetic glucocorticoids such as prednisolone, leading to reduced drug efficacy in conditions like inflammatory bowel disease (IBD) [18]. Targeting these microbial enzymes offers a novel therapeutic strategy to modulate the sterolbiome, potentially improving the management of hormone-dependent cancers and metabolic disorders while enhancing the precision of steroid-based therapies [9, 15]. Research into this target area focuses on developing small-molecule inhibitors to block the production of disease-promoting steroids without affecting host endocrine function [1, 15]. Additionally, the use of probiotics or prebiotics to shift the microbiome composition away from steroid-metabolizing taxa is being explored as a complementary approach [12, 16]. Understanding the structural and catalytic mechanisms of these microbial enzymes is essential for the development of targeted interventions that minimize off-target effects on the host's own steroidogenic pathways [9, 15].

Other names

Gut microbial steroid metabolismMicrobial steroid-17,20-desmolase pathwaySterolbiomeAndrobolomeGut-endocrine axisMicrobial steroid-17,20-desmolase

The therapeutic approach involves inhibiting microbial enzymes such as steroid 17,20-desmolase (DesAB) to reduce the production of pro-androgenic metabolites or modulating the OsrABC pathway to prevent the inactivation of synthetic glucocorticoids.