Senegalimassilia

Taxonomy#

Genus Senegalimassilia, family Coriobacteriaceae (or Eggerthellaceae in revised schemes), order Coriobacteriales, class Coriobacteriia, phylum Actinobacteria. S. anaerobia is the type species. Related to other Coriobacteriaceae genera with clinical relevance: Eggerthella, Collinsella, Slackia.

Metal Dependencies#

Iron. Standard iron requirements for anaerobic Actinobacteria metabolism. Coriobacteriaceae generally have modest iron acquisition systems, consistent with their ecological niche as secondary metabolizers rather than primary fermenters.

Key Enzymes and Metabolic Features#

Phytoestrogen metabolism: Coriobacteriaceae, including Senegalimassilia, participate in the conversion of dietary isoflavones (daidzein, genistein) to bioactive metabolites. Some members produce equol, a potent estrogen receptor modulator with cardiovascular and anti-cancer properties.

Bile acid transformation: Coriobacteriaceae contribute to secondary bile acid metabolism, linking them to cholesterol homeostasis and gut-liver axis signaling.

Multi-Disease MR Profile#

The opposing directionality of Senegalimassilia across conditions is striking and may reflect. Phytoestrogen metabolism: Equol production could be protective in cancer (anti-proliferative) but contributory in erectile dysfunction (estrogen modulation of vascular function). Bile acid effects: Secondary bile acid production may have opposing effects on renal vs. cardiovascular endpoints.

Population-specific effects: MR instruments may capture different Senegalimassilia strains or genetic contexts across GWAS populations.

Key Studies#

^{[1]Zhang 2023 — Causal Gut Microbiota and Erectile Dysfunction (Mendelian Randomization)Zhang et al. · 2023Open reference 1 ↓} (MR)—ED risk factor (OR 1.320).^{[2]Luo 2023 — Causal Effects of Gut Microbiota on the Risk of Chronic Kidney Disease: A Mendelian Randomization StudyMingli Luo, Jiahao Cai, Shulu Luo et al. · 2023Open reference 2 ↓} (MR, n=480,698)—Nominally significant CKD risk factor.^{[3]Causality of gut microbiome and hypertension: A bidirectional mendelian randomization studyYihui Li, Ru Fu, Ruixuan Li et al. · 2023Open reference 3 ↓} (MR)—Most significant protective factor for hypertension.

^{[4]Causal effect between gut microbiota and pancreatic cancer: a two-sample Mendelian randomization studyZhichen Jiang, Yiping Mou, Huiju Wang et al. · 2023Open reference 4 ↓} (MR)—Protective for pancreatic cancer (OR 0.635).^{[5]Huang 2022 — Correlations Between Gastrointestinal and Oral Microbiota in Children With Cerebral Palsy and EpilepsyCongfu Huang, Chunuo Chu, Yuanping Peng et al. · 2022Open reference 5 ↓} (cross-sectional)—Spasm frequency correlation in epilepsy.