Did you know? In multiple sclerosis the body withholds zinc from microbes as a defense (calprotectin), yet the enriched gut pathogens are built to steal it, and dysregulated zinc becomes toxic to myelin. So reflexively supplementing zinc can push the wrong way, and its counterpart, copper, is the metal that excess zinc quietly depletes.
Multiple Sclerosis
The microbiome and metallomic signature of multiple sclerosis: how the host withholds zinc from microbes (nutritional immunity), how the enriched pathogens steal it, how dysregulated zinc turns neurotoxic to myelin (with copper as its counterpart), how nickel fuels the enriched hydrogen-and-sulfide guild and cadmium drives the Akkermansia bloom, and how loss of butyrate-producing commensals lowers immune tolerance, with interventions and STOPs assessed through our validation method.
Microbiome-targeted interventions (MBTIs) are validated using a dual-evidence logical framework. First, the intervention must realign the condition’s microbiome signature by increasing beneficial taxa that are consistently depleted and reducing pathogenic taxa that are consistently enriched. Second, the intervention must demonstrate measurable clinical benefit. Concordance of these effects in the same context validates the intervention as an MBTI and supports the clinical relevance of the microbiome signature.
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Multiple sclerosis (MS) is a chronic immune-mediated demyelinating disease of the central nervous system. The immune system attacks myelin and axons in the brain, spinal cord, and optic nerves. Relapsing-remitting MS is the most common form at onset, marked by discrete attacks followed by partial recovery.
Single-cause thinking does not explain why MS is so heterogeneous. Epstein-Barr virus and HLA risk alleles are near-universal or common, yet most exposed people never develop MS. This page reads MS through three interacting layers: the gut microbiome, the host metallome (above all zinc, with copper as its counterpart), and the microbial metabolites that train immune tolerance. The recurring thread is zinc: the host withholds it as a defense, the enriched pathogens are built to steal it, and dysregulated zinc is directly toxic to myelin. A second metal thread acts on the microbes themselves: cadmium selects for the MS-type gut community, and nickel fuels the hydrogen-processing guild that blooms within it.
Associated Conditions
MS travels with other immune and mood conditions. Autoimmune comorbidity is common, including autoimmune thyroid disease, inflammatory bowel disease, and psoriasis. Depression and anxiety are frequent and affect quality of life. Vascular comorbidity, such as hypertension and diabetes, is associated with faster disability progression and worse outcomes.
Causes
Epstein-Barr virus is established as a necessary but not sufficient cause of MS. A longitudinal military cohort found MS risk rose 32-fold after EBV infection, with no comparable rise after other viruses[1]. EBV alone does not cause MS. The disease emerges from a constraint set that also includes the HLA-DRB1*15:01 risk allele, low vitamin D and UVB exposure, adolescent obesity, cigarette smoking, and gut dysbiosis, acting together.
Environmental and occupational exposures round out the causal picture, and they point repeatedly at zinc. A meta-analysis of blood trace elements found altered zinc and copper status in MS[2]. Disease clusters have appeared in zinc-exposed workplaces, and MS risk rises with occupational solvent exposure[3][4].
Which environmental and occupational exposures recur in MS?
Exposure
Observation
Zinc-processing industry
An industry-based cluster reported eleven MS cases over a decade, and all plant workers (cases and controls) had higher serum zinc than people not working there.[3]
Teaching (dustless chalk)
Female teachers carry a raised MS incidence; dustless chalk is made dustless with zinc oxide, a route of chronic zinc-oxide inhalation in classrooms.[5][6]
Shoe and leather work
Surveys found excess MS among shoe and leather workers, who are exposed both to organic solvents in glues and to zinc oxide used in rubber adhesives.[7][4]
Blood trace-element status
A systematic review and meta-analysis of blood trace elements in MS found altered zinc and copper distribution relative to controls.[2]
Diagnosis
MS is diagnosed clinically using the 2017 McDonald criteria. Diagnosis requires evidence of demyelination disseminated in space and in time. MRI shows characteristic white-matter lesions across CNS regions and over time. Cerebrospinal fluid analysis often reveals oligoclonal bands, supporting intrathecal antibody production. No microbiome-based diagnostic test for MS exists yet.
Primer
Multiple sclerosis reads clearly through four interacting lenses: the host defense that withholds zinc from microbes, the metallome that turns dysregulated zinc into a neurotoxin, the microbiome signature that loses its tolerance-inducing commensals, and the gut-brain axis that carries it all into the central nervous system.
Nutritional Immunity
In multiple sclerosis, nutritional immunity centers on zinc. When the host senses infection it releases calprotectin, an abundant leukocyte protein that starves microbes by sequestering zinc and manganese. Calprotectin is elevated in the cerebrospinal fluid of MS patients and tracks disease activity[8].
The organisms enriched in the MS signature are built to defeat this defense. Acinetobacter, Haemophilus, Pseudomonas, and Proteus each carry high-affinity zinc-acquisition systems that let them grow despite calprotectin-mediated zinc withholding[9][10][11][12][13]. Their bloom is, in part, the readout of a host locked in a zinc battle it is not clearly winning[14].
The interpretive rule follows the framework: a low zinc reading in active disease can be host defense, not a deficiency to correct. Supplementing the metal the host is deliberately withholding risks feeding the very organisms the sequestration is meant to starve.
Metallomic Signature
The metallomic signature of multiple sclerosis is read in the patient, and it is dominated by zinc. Serum and plasma zinc tend to run low while whole-blood and erythrocyte zinc run high, a redistribution rather than a simple deficit[2][15]. Inside the central nervous system, dysregulated zinc is directly neurotoxic.
Zinc and copper move as a pair. Excess zinc induces metallothionein, which blocks copper absorption and drives copper deficiency, and CNS demyelination is associated with exactly that combination of copper deficiency and hyperzincemia[16][17]. Fittingly, the standard animal model of MS is induced with cuprizone, a copper-chelating agent.
Two more metals act on the microbes rather than the myelin. Cadmium, which runs higher in the blood of people with MS and higher still in smokers, experimentally blooms the mucin degrader Akkermansia and starves butyrate producers[18][19]. Nickel is the cofactor that powers the enriched hydrogen-processing guild, the methanogen and the sulfate reducers, so a low-nickel diet becomes a candidate microbial lever even though host nickel itself is not elevated in MS[20][21][22].
What is the metallomic signature of multiple sclerosis?
Metal
Findings
Zinc
The master metal of the MS metallome. Serum zinc runs low while intracellular and erythrocyte zinc run high, a redistribution not a deficit[2]. Cytosolic zinc accumulation drives excitotoxic oligodendrocyte death, and zinc release activates matrix metalloproteinase-9, opens the blood-brain barrier, and admits immune cells; zinc chelation is protective in the MS animal model[23][15]. Implication: zinc supplementation is a STOP absent documented deficiency.
Copper
The counterpart that excess zinc suppresses. Excess zinc induces metallothionein and lowers copper absorption, and copper deficiency with hyperzincemia produces CNS demyelination[16][17]. The cuprizone (copper-chelator) model induces demyelination directly. Implication: check copper before attributing a myelopathy to MS, and avoid unopposed high-dose zinc.
A secondary player. MS also shows CNS iron accumulation in iron-laden microglia at chronic-active (paramagnetic-rim) lesions, a marker of smoldering neurodegeneration[24][25]. Implication: reflexive iron supplementation absent documented deficiency is likewise unwarranted.
Nickel
The microbial cofactor metal, read in the bugs rather than the patient. Nickel powers the hydrogen-processing guild enriched in MS: methanogenesis turns on the nickel-bearing F430 cofactor of methyl-coenzyme M reductase, and both the methanogen and the sulfate reducers use nickel-iron hydrogenases[20][26]. Host nickel is not elevated; one blood study found it lower in MS[21]. Implication: the lever is a low-nickel diet to constrain the guild, which measurably reshapes the gut microbiome in nickel-sensitive people[22], not nickel supplementation or restriction of the patient's own stores.
Cadmium
A toxic metal that selects for MS-type dysbiosis. Blood cadmium runs higher in people with MS, and higher still in smokers, a known MS risk factor[18]. In a controlled animal study, oral cadmium reproducibly bloomed Akkermansia muciniphila and depleted short-chain-fatty-acid producers, the same direction seen in the MS gut, and the authors tied Akkermansia over-abundance to MS[19]. Implication: reducing cadmium exposure, above all cigarette smoke, targets an upstream driver of the signature.
Microbiome Signature
The multiple sclerosis microbiome signature has two faces. On one side, butyrate and short-chain fatty acid producers are depleted: Roseburia, Butyricimonas, Lachnospira, and Dialister all fall[27][28]. These organisms feed the regulatory T cell circuit that restrains autoimmunity, so their loss lowers immune tolerance[29][30].
On the other side, a mucin degrader (Akkermansia) and a methanogen (Methanobrevibacter) bloom, alongside zinc-resistant Proteobacteria[27].
A third face is the hydrogen-and-sulfur guild, and it is where the metallome meets the microbes. Fermenters release hydrogen that feeds two nickel-dependent consumers enriched in MS: the methanogen Methanobrevibacter, which vents it as methane, and the sulfate-reducing bacteria Desulfovibrio and Bilophila, which vent it as cytotoxic hydrogen sulfide[26][31]. Higher Bilophila tracks MS progression and disability[32], and the sulfidogens draw down cysteine, lowering the glutathione that protects the barrier[33]. Because methanogenesis and these hydrogenases all run on nickel[20], a low-nickel diet is a single lever aimed at the whole guild[22]. The methanogen's own direction is not fixed across cohorts, so the target is the nickel-fueled guild, not one taxon.
Explore the interactive Microbiome Signature chart above for the per-taxon panels, including the Metallomic Signature lens on each, and the studies behind each association.
Immune Tolerance and the Gut-Brain Axis
The gut shapes the immune tolerance that fails in MS, and the evidence is now causal, not just correlational. Gut microbiota from MS patients transferred into germ-free mice raises CNS autoimmunity above transfers from healthy controls, and MS-twin ileal Lachnospiraceae trigger MS-like disease in germ-free transgenic mice[34][35][36].
A discordant-twin study narrowed those drivers to two Lachnospiraceae, Eisenbergiella tayi and Lachnoclostridium. Across 81 monozygotic twins discordant for MS, over 50 taxa differed, most of the increases within the Firmicutes; transferring ileal microbiota from the MS-affected twin induced disease far more often than healthy-twin material, and Lachnoclostridium then expanded to dominate the gut of the diseased animals (38 to 75 percent of the community), with female mice the more susceptible[36]. This is the strongest functional evidence yet that specific enriched gut bacteria facilitate MS, and it puts Lachnoclostridium, itself a member of the otherwise MS-depleted Lachnospiraceae, on the chart as an anomaly worth watching.
The MS signature also carries pathogens implicated through molecular mimicry. Acinetobacter and Haemophilus, whose zinc-acquisition systems let them resist host sequestration, carry proteins that share sequence with myelin, a route to activating autoreactive T cells[9][11]. This runs in parallel with the Epstein-Barr virus route, in which the viral protein EBNA1 cross-reacts with the CNS protein GlialCAM[37]. Dietary sodium adds a third push: high salt drives pathogenic Th17 cells and worsens the animal model[38].
Akkermansia muciniphila is the honest paradox. It is enriched in MS and degrades the protective mucin layer, which could expose the epithelium, yet a 2021 analysis found MS-derived Akkermansia linked to lower disability and able to ameliorate the animal model, suggesting its rise may be a compensatory response rather than a driver[27][39]. Its role appears context-dependent, so its enrichment is reported as an association, not a verdict.
Interventions
Our validation method confirms each candidate through its validation workflow, then classifies it as Validated, Promising Candidate, or Validation In Progress. Every option below is an adjunct to standard disease-modifying therapy, not a replacement. The one Validated MBTI (microbiome-targeted intervention) here is glatiramer acetate, an approved drug whose benefit is partly antimicrobial against the signature's Gram-negative pathogens[40]; the remaining candidates are Promising or still in progress.
Intervention
Classification
MBTI Status
Evidence
STOPs
A STOP (Suggested Termination Of Practice) flags a common practice that works against the biology of the disease. Through the zinc-first, host-defense lens, multiple sclerosis surfaces several routine practices worth reconsidering, each paired with a safer swap. These target general supplement and diet habits, not prescribed disease-modifying therapy.
What STOPs should be considered?
STOP
Rationale and SWAP
High-dose zinc or zinc-oxide exposure
The signature metals-first STOP. In MS, dysregulated zinc drives oligodendrocyte death, matrix metalloproteinase-9 activation, and blood-brain-barrier breakdown, and zinc chelation is protective in the animal model[23][15]; high-dose zinc, and chronic zinc-oxide inhalation, push the wrong way. SWAP: avoid high-dose zinc and zinc-oxide exposure absent documented deficiency. The studied exception is low-dose zinc aspartate, a different form and dose that suppressed the animal model, not routine or high-dose zinc[53].
Excessive vitamin D supplementation
Correcting deficiency is reasonable, but mega-dosing is not: high-dose vitamin D3 added to interferon did not meet its primary endpoint, and excess risks hypercalcemia[55]. SWAP: restore vitamin D to sufficiency and stop there, rather than escalating to very high doses.
Cranberry for UTI prophylaxis
Urinary tract infections are common in MS, but a multicenter randomized trial found cranberry extract no better than placebo at preventing them[58]. SWAP: manage recurrent UTIs with proven measures such as D-mannose and catheter hygiene instead of relying on cranberry.
Low-fat, plant-based diet as a disease-modifier
Well-adhered, but a randomized trial showed no benefit on brain MRI, relapse rate, or disability[59]. SWAP: prioritize soluble fiber that feeds butyrate producers over a blanket low-fat rule.
High dietary sodium
High salt drives pathogenic Th17 cells and worsens the animal model of MS[38]. SWAP: moderate sodium toward guideline intake, favoring whole foods over processed, high-sodium products.
FAQs
What is Multiple Sclerosis?
Quick answer: Multiple sclerosis (MS) is a chronic immune-mediated demyelinating disease of the central nervous system. The immune system attacks myelin and axons in the brain, spinal cord, and optic nerves. Relapsing-remitting MS is the most common form at onset, marked by discrete attacks followed by partial recovery.
What conditions are associated with Multiple Sclerosis?
Quick answer: MS travels with other immune and mood conditions. Autoimmune comorbidity is common, including autoimmune thyroid disease, inflammatory bowel disease, and psoriasis. Depression and anxiety are frequent and affect quality of life. Vascular comorbidity, such as hypertension and diabetes, is associated with faster disability progression and worse outcomes.
What causes Multiple Sclerosis?
Quick answer: Epstein-Barr virus is established as a necessary but not sufficient cause of MS. A longitudinal military cohort found MS risk rose 32-fold after EBV infection, with no comparable rise after other viruses [1] . EBV alone does not cause MS. The disease emerges from a constraint set that also includes the HLA-DRB1*15:01 risk allele, low vitamin D and UVB exposure, adolescent obesity, cigarette smoking, and gut dysbiosis, acting together.
Research Feed
Alterations of the human gut microbiome in multiple sclerosis
2016
The landmark human cohort that pinned the MS gut signature to increased Methanobrevibacter and Akkermansia and decreased Butyricimonas.
Location
United States of America
Sample Site
Feces
Species
Homo sapiens
What was studied?
Jangi and colleagues profiled the gut microbiome in MS versus healthy controls with 16S sequencing, then linked taxa to immune-gene expression.
Who was studied?
Sixty MS patients and 43 healthy controls, with breath methane measured in a second cohort.
What were the key findings?
MS showed increased Methanobrevibacter and Akkermansia and decreased Butyricimonas; shifts correlated with dendritic-cell, interferon, and NF-kB gene programs, and disease-modifying treatment raised Prevotella and Sutterella.
What are the implications?
It established a reproducible MS enrichment of a methanogen and a mucin degrader alongside loss of a butyrate producer, tied to circulating immune activation.
Multiple sclerosis patients have a distinct gut microbiota compared to healthy controls
2016
A Mayo Clinic cohort confirming a distinct RRMS gut community, with higher Blautia and Dorea.
Location
United States of America
Sample Site
Feces
Species
Homo sapiens
What was studied?
Chen and colleagues compared fecal microbiota in relapsing-remitting MS and matched controls using 16S sequencing of the V3-V5 region.
Who was studied?
Thirty-one RRMS patients and 36 age- and sex-matched healthy controls.
What were the key findings?
MS carried a distinct community with higher Pseudomonas, Mycoplana, Haemophilus, Blautia, and Dorea; controls had more Parabacteroides, Adlercreutzia, and Prevotella.
What are the implications?
It reinforced that MS gut dysbiosis is real and reproducible, and named zinc-acquiring Proteobacteria among the enriched taxa.
Dysbiosis in the Gut Microbiota of Patients with Multiple Sclerosis, with a Striking Depletion of Species Belonging to Clostridia XIVa and IV Clusters
2015
The Japanese cohort that first tied MS to a striking loss of Treg-inducing Clostridia clusters XIVa and IV.
Location
Japan
Sample Site
Feces
Species
Homo sapiens
What was studied?
Miyake and colleagues profiled the gut microbiota of Japanese RRMS patients by pyrosequencing, with longitudinal control sampling.
Who was studied?
Twenty RRMS patients versus 40 healthy controls, plus 18 controls sampled repeatedly over months.
What were the key findings?
MS showed moderate dysbiosis with striking depletion of Clostridia clusters XIVa and IV; the depleted clostridia differed from the Treg-inducing species of other autoimmune conditions.
What are the implications?
Loss of specific clostridia may remove immune-regulatory signals, making microbiota correction a candidate strategy.
Gut microbiota in early pediatric multiple sclerosis: a case-control study
2016
Dysbiosis is already present near disease onset in children, before long treatment exposure.
Location
United States of America
Sample Site
Feces
Species
Homo sapiens
What was studied?
Tremlett and colleagues examined fecal bacterial composition and predicted function in early pediatric MS using 16S sequencing and PICRUSt.
Who was studied?
Eighteen recent-onset relapsing-remitting pediatric MS cases and 17 controls, ages 4 to 18.
What were the key findings?
MS was enriched in Desulfovibrionaceae and depleted in Lachnospiraceae and Ruminococcaceae, with predicted enrichment of glutathione-metabolism genes suggesting a pro-inflammatory milieu.
What are the implications?
Gut dysbiosis appears near disease onset in children, arguing it is not merely a late consequence of long-term therapy.
A comparative study of the gut microbiota in immune-mediated inflammatory diseases: does a common dysbiosis exist?
2018
A shared dysbiotic core spans autoimmune diseases, with reduced Dialister marking MS specifically.
Location
Canada
Sample Site
Feces
Species
Homo sapiens
What was studied?
Forbes and colleagues compared shared and unique gut taxa across immune-mediated inflammatory diseases using 16S sequencing and machine learning.
Actinomyces, Eggerthella, and Streptococcus rose across diseases while Lachnospira and Gemmiger fell; MS specifically showed higher Erysipelotrichaceae and lower Dialister.
What are the implications?
A common dysbiotic core underlies several autoimmune diseases, with disease-specific signatures such as reduced Dialister in MS.
Mining the microbiota to identify gut commensals modulating neuroinflammation in a mouse model of multiple sclerosis
2022
Causal EAE evidence that specific Treg-inducing commensals set the tone controlling CNS autoimmunity.
Location
United States of America
Sample Site
Feces
Species
Mus musculus
What was studied?
Bianchimano and colleagues used vancomycin in the EAE mouse model to identify gut commensals that modulate neuroinflammation.
Who was studied?
EAE mice, untreated versus vancomycin-treated, tracked across the disease course.
What were the key findings?
Vancomycin ameliorated EAE through the microbiota, enriching Treg-inducing Clostridia clusters XIVa and XVIII; the butyrate producer Anaerotruncus colihominis was protective and 50 taxa correlated with severity.
What are the implications?
It provides causal, mechanistic evidence that specific commensals set the regulatory T-cell tone controlling CNS autoimmunity.
Lachnospiraceae from the ileum of MS twins trigger MS-like disease in germ-free transgenic mice
2025
The twin study that moved MS microbiome science from association to causation, pinpointing ileal Lachnospiraceae.
Location
Germany
Sample Site
Feces
Species
Homo sapiens
What was studied?
Yoon and colleagues tested whether MS-patient gut bacteria functionally cause MS-like disease, using discordant twins and gnotobiotic mice.
Who was studied?
Eighty-one monozygotic twin pairs discordant for multiple sclerosis; selected ileal samples were transferred to germ-free EAE-prone transgenic mice.
What were the key findings?
Over 50 taxa differed (most increases within the Firmicutes), and MS-derived ileal microbiota induced disease far more often than healthy-twin material. The two likely disease-facilitating organisms were both Lachnospiraceae, Eisenbergiella tayi and Lachnoclostridium, and Lachnoclostridium expanded to dominate the gut (38 to 75 percent) of the diseased mice; females were more susceptible.
What are the implications?
It advances MS microbiome science from association toward causation and pinpoints two ileal Lachnospiraceae, Eisenbergiella tayi and Lachnoclostridium, as disease-facilitating.
Identification of commensal gut microbiota signatures as predictors of clinical severity and disease progression in multiple sclerosis
2024
A longitudinal cohort where baseline gut microbiota predicted MS progression, and the sulfidogen Bilophila tracked worsening disability.
Location
United States of America
Sample Site
Feces
Species
Homo sapiens
What was studied?
Montgomery and colleagues followed MS patients over 4.2 years and linked the baseline fecal microbiome to change in disability.
Who was studied?
Fifty-eight MS patients across clinical subtypes, stratified into progressors and non-progressors by change in EDSS.
What were the key findings?
Worsening disease was marked by depletion of Akkermansia, Lachnospiraceae, and Oscillospiraceae and expansion of Alloprevotella, Prevotella-9, and Rhodospirillales; the sulfidogen Bilophila tracked both progression and severity, and the inferred metagenome shifted toward oxidative-stress aerobic respiration at the expense of vitamin K2 and short-chain fatty acids.
What are the implications?
It nominates the sulfidogenic, redox-shifting community as a driver of progression and puts Bilophila forward as a severity marker.
Investigating the metabolite signature of an altered oral microbiota as a discriminant factor for multiple sclerosis: a pilot study
2024
An oral-and-gut microbiome study whose salivary metabolite signature discriminated MS with 92 percent specificity.
Location
France
Sample Site
Saliva
Feces
Species
Homo sapiens
What was studied?
Boussamet and colleagues profiled paired saliva and stool microbiota and inferred their metabolites in MS.
Who was studied?
Fourteen MS patients and 21 controls in a French discovery set, validated in an independent German cohort.
What were the key findings?
MS depleted oral and gut commensals (Aggregatibacter, Streptococcus, Roseburia) and enriched inflammation-associated taxa (Leptotrichia, Fusobacterium, Enterobacteriaceae, Actinomyces), with reduced non-heme ferritin and a shifted sulfur metabolism.
What are the implications?
It extends the MS signature to the mouth and links it to iron- and sulfur-handling changes.
Feeding the gut microbiome: impact on multiple sclerosis
2023
A review compiling the MS microbiome directions and the diet levers that shape them.
Location
Italy
Sample Site
Literature review
Species
Homo sapiens
What was studied?
Bronzini and colleagues reviewed how diet feeds the gut microbiome and shapes the course of MS.
Who was studied?
A synthesis of preclinical EAE studies and human dietary-intervention studies in MS.
What were the key findings?
It compiles the MS directions, with Methanobrevibacter, Akkermansia, and Desulfovibrionaceae increased and butyrate producers (Faecalibacterium, Butyricimonas, Clostridium clusters IV and XIVa) decreased.
What are the implications?
It frames diet, including mineral intake, as a practical lever on the MS microbiome.
Association of intestinal dysbiosis with susceptibility to multiple sclerosis: Evidence from different population studies
2023
A review tying a sulfidogenic, glutathione-depleting shift to oxidative injury in MS.
Location
Mexico
Sample Site
Literature review
Species
Homo sapiens
What was studied?
Torres-Chavez and colleagues reviewed population evidence linking gut dysbiosis to MS susceptibility.
Who was studied?
A synthesis across United States, European, Japanese, and Latin American cohorts plus EAE and in vitro work.
What were the key findings?
Anti-inflammatory commensals (Prevotella, Parabacteroides) fall while pro-inflammatory taxa (Akkermansia, Dorea, Blautia, Pseudomonas, Bilophila, Methanobrevibacter) rise; Desulfovibrionaceae draw down cysteine and can lower barrier-protecting glutathione.
What are the implications?
It supplies the sulfur-antioxidant mechanism linking sulfate reducers to blood-brain-barrier injury.
Gut Microbiome Signatures in Multiple Sclerosis: A Case-Control Study with Machine Learning and Global Data Integration
2025
A treatment-naive case-control study with machine learning across 29 integrated datasets.
Location
Russia
Sample Site
Feces
Species
Homo sapiens
What was studied?
Neklesova and colleagues sequenced MS and control stool and integrated 29 published datasets with machine learning.
Who was studied?
Twenty-nine relapsing-remitting MS patients in exacerbation and 27 healthy controls.
What were the key findings?
MS reduced Eubacteriales, Lachnospirales, Oscillospiraceae, Lachnospiraceae, Parasutterella, and Faecalibacterium and raised Lachnospiraceae UCG-008; a gradient-boosting classifier separated MS at an AUC-ROC of 0.95.
What are the implications?
It reinforces the loss of butyrate producers and shows the signature is strong enough for classification.
A preliminary study of the concentration of metallic elements in the blood of patients with multiple sclerosis as measured by ICP-MS
2020
An ICP-MS blood-metal study finding lead elevated and nickel among the reduced elements in MS.
Location
Brazil
Sample Site
Blood
Species
Homo sapiens
What was studied?
de Oliveira and colleagues measured twelve metallic elements in the blood of MS patients and controls by ICP-MS.
Who was studied?
Thirty patients with multiple sclerosis and matched healthy controls.
What were the key findings?
MS blood showed reduced beryllium, copper, chromium, cobalt, nickel, magnesium, and iron, and a significantly elevated concentration of lead.
What are the implications?
It anchors the honest reading that host nickel is not elevated in MS, so the nickel lever is microbial, aimed at the enriched methanogen and sulfate reducers rather than at the patient's own stores.
Update History
2026-07-05
Metal-microbe interface added major
Added the nickel and cadmium axes to the metallomic signature and a per-taxon Metallomic Signature lens to every Microbiome Signature panel: the nickel-dependent methanogen and sulfate-reducing (hydrogen sulfide) guild, cadmium as a driver of the Akkermansia bloom, and a low-nickel diet as a candidate microbiome-targeted lever. Charted Desulfovibrio, Bilophila, and Pseudomonas, and integrated Montgomery 2024, Bronzini 2023, Torres-Chavez 2023, Zhang 2021, and de Oliveira 2020.
2026-07-05
Interventions validated and expanded major
Glatiramer acetate added as the Validated MBTI (Pharmaceutical) with its own validation page; clemastine fumarate and zinc aspartate given dedicated pages; the zinc STOP now distinguishes zinc oxide from low-dose zinc aspartate.
2026-07-05
Zinc framework integrated major
Metallomic signature and nutritional immunity reframed around zinc (calprotectin sequestration, zinc neurotoxicity, copper counterpart); interventions and STOPs expanded; environmental and occupational zinc exposures added. Incorporates the 2021 framework and newer evidence (including Akkermansia as possibly compensatory).
2026-07-05
Page published major
Initial build: microbiome signature (BugSigDB corpus of 7 studies), metallomic signature, primer, validated interventions, and STOPs.
Identification of an Acinetobacter baumannii zinc acquisition system that facilitates resistance to calprotectin-mediated zinc sequestration during pneumonia.
Hood MI, Mortensen BL, Moore JL, et al. PLoS Pathog. 2012
The Effects of Low-Nickel Diet Combined with Oral Administration of Selected Probiotics on Patients with Systemic Nickel Allergy Syndrome and Gut Dysbiosis.
Lombardi F, Fiasca F, Minelli M, et al. Nutrients. 2020
Multiple sclerosis and gut microbiota: Lachnospiraceae from the ileum of MS twins trigger MS-like disease in germfree transgenic mice-An unbiased functional study.
Yoon H, Gerdes LA, Beigel F, et al. Proc Natl Acad Sci U S A. 2025
Copolymer 1 reduces relapse rate and improves disability in relapsing-remitting multiple sclerosis: results of a phase III multicenter, double-blind placebo-controlled trial.
Johnson KP, Brooks BR, Cohen JA, et al. Neurology. 1995
Safety and efficacy of MD1003 (high-dose biotin) in patients with progressive multiple sclerosis (SPI2): a randomised, double-blind, placebo-controlled, phase 3 trial.
Cranberry versus placebo in the prevention of urinary infections in multiple sclerosis: a multicenter, randomized, placebo-controlled, double-blind trial.
Gallien P, Amarenco G, Benoit N, et al. Mult Scler. 2014
Interventions
Overview
Microbiome Signature
FAQs
Research Feed
Update History
References