Dr. Pascal Mensah | Ymmunoledge https://drpascalmensah.com Precision Immunology · Longevity Medicine · Mallorca Wed, 01 Apr 2026 13:49:09 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://drpascalmensah.com/wp-content/uploads/2026/03/cropped-logo-4-32x32.png Dr. Pascal Mensah | Ymmunoledge https://drpascalmensah.com 32 32 The M1/M2 Thermodynamic Axis: One Trade-Off Across Disease https://drpascalmensah.com/m1-m2-thermodynamic-axis/ https://drpascalmensah.com/m1-m2-thermodynamic-axis/#respond Tue, 31 Mar 2026 15:46:58 +0000 https://drpascalmensah.com/?p=20890 What if inflammation, sepsis, and cancer immune evasion all share the same thermodynamic flaw?
This article explores how a single bioenergetic switch in immune cells—between OXPHOS and glycolysis—drives disease across sepsis, rheumatoid arthritis, and lung cancer.

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The Core Biological Principle

Every macrophage makes a thermodynamic choice. It can run on Oxidative Phosphorylation (OXPHOS) — a high-efficiency, low-entropy metabolic state — or switch to aerobic glycolysis — a fast, wasteful, high-entropy mode. That single metabolic decision determines whether the immune cell heals or damages the host.

This bioenergetic trade-off is not a side effect of disease. It is the molecular engine of disease. The same logic plays out identically across three clinically distinct conditions: sepsis, rheumatoid arthritis, and lung cancer.

The Bioenergetic Phenotype Comparison

Low entropy = order = health. High entropy = disorder = disease. Mitochondria are the cell’s entropy management system.

1. Sepsis — When the Engine Overheats

In sepsis, bacterial signals collapse the mitochondrial membrane potential (∆Ψm), flood the cell with reactive oxygen species (ROS), and force a metabolic switch from OXPHOS to glycolysis. The result is M1 macrophage hyperpolarisation: massive IL-1β, TNF-α, and IL-6 release — the cytokine storm. This is not just inflammation; it is thermodynamic failure. The cell dissipates energy as heat and entropy instead of extracting useful biological work.

Molecular Mechanisms

• ROS burst from Complex I/III → HIF-1α stabilisation → glycolytic gene upregulation
• Loss of ∆Ψm → impaired ATP synthase coupling → proton leak as heat
• mtDNA released into cytosol → cGAS-STING activation → amplified innate immune response
• Succinate accumulation → HIF-1α and IL-1β post-translational stabilisation

✓ Clinical Translation +
• NAD+ precursors (NMN, NR): restore Complex I cofactor availability, rescue OXPHOS capacity, and reduce M1 cytokine production in preclinical sepsis models.
• Mitochondria-targeted antioxidants (MitoQ, SS-31): scavenge IMM-generated superoxide, preserve ∆Ψm, and attenuate organ injury in CLP models.
• Biomarker opportunity: OCR/ECAR ratio (oxygen consumption vs. extracellular acidification) as a bedside metabolic index of macrophage inflammatory state.

2. Rheumatoid Arthritis — Entropy as a Chronic Tenant

The RA synovial joint is a permanently high-entropy microenvironment: hypoxic, glucose-depleted, acidic, and flooded with lactate. CD4+ T cells, macrophages, and fibroblast-like synoviocytes converge on aerobic glycolysis to survive. This metabolic shift is the inflammation — it sustains HIF-1α, fuels NF-κB, and keeps the NLRP3 inflammasome active. Meanwhile, Tregs (which depend on fatty acid oxidation and OXPHOS for their suppressive function) are metabolically starved in the same environment.

Molecular Mechanisms

• HIF-1α → GLUT1/LDHA upregulation → increased glycolytic flux → IL-17, IL-6 production
• Mitochondrial ROS → NF-κB and NLRP3 activation → sustained cytokine loop
• mTORC1 activation → suppresses OXPHOS → biases T cells away from Treg toward Th17 fate
• FAO-dependent Tregs: thermodynamic substrate starvation (low lipid availability in hypoxic joint) = loss of immune regulation

✓ Clinical Translation +
• Metformin: Complex I inhibitor → activates AMPK, restores metabolic balance, reduces glycolytic flux in RA immune cells. Anti-inflammatory effect independent of its glucose-lowering action.
• mTOR inhibitors (rapamycin analogues): shift T cell fate from Th17 toward Treg by derepressing OXPHOS and FAO.
• Biomarker opportunity: P/O ratio (ATP per O2 consumed) and NAD+ /NADH in synovial immune cells as quantitative disease activity metrics.

3. Lung Cancer — The Tumor as a Thermodynamic Trap

Lung tumours export entropy into their microenvironment. They consume glucose ferociously via the Warburg effect, release lactate that acidifies the milieu, and deplete O2 — creating a thermodynamic prison for tumour-infiltrating lymphocytes (TILs). TILs show declining oxygen consumption rates, reduced mitochondrial mass, and collapsed ∆Ψm. T cell exhaustion is not merely a transcriptional programme — it is a bioenergetic collapse. The tumour does not just hide from immunity. It starves it.

Molecular Mechanisms

• Warburg glycolysis in tumour cells → lactate efflux → TME acidification → T cell OXPHOS inhibition
• Glucose/glutamine depletion in TME → substrate-starved TILs → loss of effector ∆G
• Hypoxia → HIF-1α in tumour → VEGF/PD-L1 upregulation → immune exclusion and checkpoint exhaustion
• CD36high TIL phenotype: excess lipid uptake → mitochondrial lipid overload → ferroptosis susceptibility

✓ Clinical Translation +
• Metabolic + checkpoint combination: OXPHOS enhancers (urolithin A, NMN) + anti-PD-1 show synergistic TIL reinvigoration in preclinical NSCLC models.
• Nutritional intervention: methionine restriction reduces Treg suppression; glutamine supplementation restores TIL respiratory capacity.
• Biomarker opportunity: Seahorse OCR profiling of TILs pre-therapy; hyperpolarised 13C-pyruvate MRI for real-time TME metabolic mapping.

Thermodynamic & Quantitative Perspective

Each disease represents a measurable deviation from thermodynamic efficiency. The key variables are not just molecular — they are quantifiable bioenergetic parameters that can be tracked clinically:

• ∆Ψm (mitochondrial membrane potential): Index of proton motive force and OXPHOS coupling. Collapse precedes immune dysfunction.

• P/O ratio (phosphorylation efficiency): ATP produced per O■ consumed. Declines with inflammatory reprogramming.

• OCR/ECAR ratio: Oxygen consumption vs. extracellular acidification rate — a real-time OXPHOS/glycolysis balance index.

• NAD+ /NADH ratio: Master redox sensor. Low NAD+ = impaired OXPHOS, increased entropy, impaired sirtuin-mediated immune regulation.

• mtDNA copy number / cytosolic mtDNA: Proxy for mitochondrial entropy accumulation and DAMP-mediated innate activation.

Unified Clinical Framework

Where This Is Going: Next-Generation Immune Biomarkers

The next generation of immune biomarkers will not be limited to cytokines alone. They will be metabolic:

• OCR/ECAR ratio in patient peripheral blood immune cells
• Mitochondrial membrane potential (∆Ψm) as an immune activation index
• NAD+ /NADH ratio as a systemic bioenergetic health score
• mtDNA release rate as a real-time entropy production marker
• Urinary lactate/pyruvate ratio as a non-invasive glycolytic shift readout

And the therapies that follow will not just block receptors — they will restore thermodynamic order to immune cells that have lost it. This is the promise of immunometabolism: not more immunosuppressants, but smarter bioenergetic strategies that give immune cells back what disease took from them.

When your patient’s immune system is failing, are you asking why it cannot fight — or only how to help it fight harder? The answer may be in the mitochondria.

Selected Evidence Base

1. Ji F et al. Crosstalk of mitochondrial dysfunction and macrophage polarization in sepsis. Front Immunol. 2026.
2. Xie R et al. Roles of immune cell metabolism in rheumatoid arthritis. Front Immunol. 2026.
3. Eivazzadeh Y et al. Immunometabolism in lung cancer. iScience. 2026.
4. Dwivedi V et al. Mitochondrial dysfunction and cellular senescence in ageing sarcopenia. Mol Biol Rep. 2026.
5. Seledtsov V. Mitochondria-targeted therapy in anti-aging medicine. J Biol Methods. 2026.
6. Glogowski PA et al. Reprogramming the mitochondrion in atherosclerosis. Antioxidants. 2025.
7. Xu Y et al. Nutritional intervention alleviates T cell exhaustion and empowers anti-tumor immunity. Front Immunol. 2026.
8. Zhang XY et al. The role of CD36 in immune function. Front Immunol. 2026.

This document is an evidence-based scientific communication intended for medical professionals, PhD researchers, and advanced students. All claims reflect peer-reviewed literature as of Q1 2026. Not intended as direct clinical guidance.

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]]> https://drpascalmensah.com/m1-m2-thermodynamic-axis/feed/ 0 When Microglia Can’t Clean Up Their Mitochondria https://drpascalmensah.com/when-microglia-cant-clean-up-their-mitochondria/ https://drpascalmensah.com/when-microglia-cant-clean-up-their-mitochondria/#respond Tue, 31 Mar 2026 15:46:58 +0000 https://drpascalmensah.com/?p=20786 Can damaged mitochondria trap the brain in chronic inflammation and drive depression?
This article explores how mitochondria–lysosome crosstalk failure locks microglia into a self-sustaining inflammatory loop, and how this mechanism connects to sepsis, T cell dysfunction, and the IRG1–itaconate axis.

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The Mechanistic Chain

From mitochondrial damage to locked neuroinflammation — step by step

1

Mitochondria Damaged

ATP↓ ROS↑ ΔΨm collapses

2

Lysosomes Fail

Mitophagy blocked Damaged organelles accumulate

3

mtDNA Escapes

Cytosolic release cGAS-STING + TLR9 fire

4

Inflammation Locked

Microglia → M1-like IL-1β, TNF-α, IFN-I

5

Loop Closes

Cytokines impair mitochondria further

Key insight: This is a positive feedback loop — not a linear cascade

STEPS 1–2

Mitochondria Fail. Lysosomes Can't Keep Up.

Mitophagy flux failure is the central bottleneck

ETC Dysfunction

Complexes I & III leak electrons → superoxide burst → membrane depolarisation (ΔΨm↓)

DRP1 Hyperfission

Damaged organelles fragment faster than the lysosomal clearing rate → net accumulation

Lysosomal Acidification Failure

Inflammatory cytokines impair V-ATPase → lysosomal pH rises → LC3-II cargo undegraded

NAD+ Depletion Loop

ROS activates PARP1 → NAD+ consumed → SIRT1/3 fall → PGC-1α drops → less biogenesis

STEPS 3–4 · mtDNA Escapes → Inflammation Locks In

Mitophagy
Blocked

  • Undegraded damaged mito persist
  • Labile iron + cardiolipin exposed
  • mtDNA leaks into cytosol
  • Cannot be degraded by failed lysosomes

Innate Sensors
Activate

  • cGAS detects cytosolic dsDNA
  • STING → IRF3 → IFN-I cascade
  • TLR9 senses oxidised mtDNA
  • NLRP3 activated by mtROS + cardiolipin

Inflammation
Locked

  • Sustained IFN-I, IL-1β, TNF-α
  • M1-like microglial phenotype fixed
  • Phagocytic capacity (M2) lost
  • Cytokines further impair ETC → loop

Thermodynamic insight: Oxidised mtDNA (iron-driven ROS, Ferroptosis paper) is a stronger TLR9 agonist than native mtDNA — a redox-to-immune- signalling amplifier linking bioenergetic failure to locked inflammation.

Connection #1 — Mitochondria & Lysosomes in T Cell Immunometabolism

Same organelle crosstalk principle — different immune cell, same thermodynamic failure mode

same failure

Microglia (CNS)

  • Brain-resident innate immune cell
  • Requires OXPHOS-ATP for phagocytosis of synaptic debris
  • Mito-lysosome failure → mtDNA release → cGAS-STING
  • Locks into pro-inflammatory M1-like phenotype
  • Result: Neuroinflammation, depression-like behaviour

T Cells (Peripheral)

  • Adaptive immune cell in periphery + CNS
  • Lysosomal degradation required for TCR recycling & memory
  • Mito-lysosome failure → impaired autophagy → T cell exhaustion
  • Locks into dysfunctional exhausted phenotype (PD-1+ TIM-3+)
  • Result: Immunosuppression, failed anti-tumour / anti-viral immunity

Unifying principle: organelle quality control failure drives inflammatory fate — regardless of immune cell lineage

Connection #2 — Crosstalk of Mitochondrial Dysfunction & Macrophage Polarisation in Sepsis

Ji, Zhang et al. — Frontiers in Immunology | The peripheral macrophage analogue of microglial mitophagy failure

Microglia — Depression

Macrophage — Sepsis

Cell type

Microglia (CNS)

Macrophages (peripheral / liver / lung)

Trigger

Chronic stress, ROS accumulation

Infection, endotoxin (LPS)

Mito failure mode

Lysosomal acidification failure → mitophagy block

ETC uncoupling, ΔΨm loss, ROS burst

DAMP signalling

mtDNA via cGAS-STING / TLR9

mtROS, mtDNA via NLRP3, TLR9

Inflammatory output

IFN-I, IL-1β → neuroinflammation

IL-6, TNF-α → cytokine storm → immune paralysis

Resolution failure

Defective phagocytosis of synaptic debris

Impaired M2 polarisation, prolonged immunosuppression

Shared therapy

NAD+ precursors, mitophagy inducers

Mitochondrial antioxidants, substrate restoration, mitophagy

Connection #3 — IRG1–Itaconate Axis in Immunometabolism

The anti-inflammatory metabolite macrophages already produce — and a potential upstream regulator of organelle crosstalk

Inflammatory Stimulus

LPS / cytokines / ROS in macrophage

IRG1 → Itaconate Made

Aconitate decarboxylase in TCA: aconitate → itaconate; also blocks succinate dehydrogenase (Complex II)

Itaconate Alkylates KEAP1

Electrophilic itaconate modifies KEAP1 cysteines → Nrf2 freed and translocates to nucleus

Nrf2 Downstream Effects

↑ TFEB targets → lysosomal biogenesis & V-ATPase
↑ Mitophagy capacity (lysosomal pH restored)
↑ NQO1, HO-1, SOD antioxidant genes
↓ NLRP3 inflammasome activation

SDH Inhibition → Less mtROS

Itaconate competitively inhibits Complex II → reduces reverse electron transport → mitochondrial ROS drops → ΔΨm protected

Nrf2 → Lysosomal Rescue

TFEB co-activation restores lysosomal acidification (V-ATPase subunits) and biogenesis → unlocks mitophagosome-lysosome fusion → organelle crosstalk restored

The Upstream Hypothesis

If endogenous itaconate (or exogenous derivatives: 4-OI, DIMCI) restores mitochondria-lysosome crosstalk in microglia, metabolic reprogramming alone may break the neuroinflammation loop — without blocking cytokines downstream

Restoring Low Entropy

Therapeutic strategies targeting the organelle quality-control failure → inflammation axis

NAD+ Precursors

NR / NMN — restore SIRT1/3 activity, reactivate PGC-1α, rescue OXPHOS coupling and mitophagy flux

Mitophagy Inducers

Urolithin A, Rapamycin — directly stimulate PINK1/Parkin pathway; accelerate clearance of damaged organelles

Lysosomal Acidifiers

V-ATPase activators, TFEB inducers — restore lysosomal pH → unlock mitophagosome-lysosome fusion

cGAS-STING / TLR9 Block

H-151, C176 — interrupt downstream mtDNA sensing; reduce IFN-I and IL-1β without suppressing upstream quality control

Principle: The path to low entropy is through the organelle — not around it.

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]]> https://drpascalmensah.com/when-microglia-cant-clean-up-their-mitochondria/feed/ 0 The Forgotten Layer of Your Exposome: Indoor Air Quality and Its Biological Consequences https://drpascalmensah.com/indoor-air-quality/ https://drpascalmensah.com/indoor-air-quality/#respond Thu, 19 Mar 2026 17:21:38 +0000 https://drpascalmensah.com/?p=19979 If we can track our biomarkers, nutrition, and sleep, why do we ignore the air we breathe?
This article explores how untested air, making up 90% of our daily exposure, delivers a continuous, low-grade biological signal to every cell in their body.

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The exposome — the totality of environmental exposures across a lifetime — was first formalised by Christopher Wild in 2005 as the necessary complement to the genome. It encompasses what we eat, the chemicals we absorb, the psychological stressors we endure, the microorganisms we encounter, and the air we breathe.1 It is, in essence, everything that is not your DNA but shapes how your DNA expresses itself.

Most discussions of the exposome focus on diet, exercise, and chronic stress. These are important. But there is a layer that is almost universally neglected in clinical practice — one that operates continuously, invisibly, and in the very space where people believe they are safe: indoor air.

"The air inside your home or clinic may be two to five times more polluted than the air outside. You cannot see it. Your patients are not measuring it. And its biological consequences are neither trivial nor short-term."

The Indoor Air Burden: What the Numbers Say

The United States Environmental Protection Agency has consistently found that indoor air pollutant concentrations can be two to five times higher than outdoor levels, and in some cases significantly more.2 The World Health Organization estimates that indoor air pollution contributes to approximately 3.8 million premature deaths annually, primarily through cooking fuel exposure in low-income settings — but the relevant exposures in higher-income contexts are different in character, not in consequence.3

In homes and offices across Europe, the primary indoor air burden consists of:

PM2.5

Fine particulate matter — penetrates alveoli, enters circulation, reaches systemic organs

Source: combustion, candles, cooking, outdoor infiltration

VOCs

Volatile organic compounds — off-gassing from furniture, paint, cleaning products

Formaldehyde, benzene, toluene — many carcinogenic at chronic exposure

Nanoparticles

Ultra-fine particles <100nm — cross blood-brain barrier, trigger oxidative stress

Printers, cooking, candles, electronic devices

Bioaerosols

Mould spores, bacterial fragments, endotoxins — potent innate immune activators

HVAC systems, dampness, organic materials

NO₂

Nitrogen dioxide — gas stoves, impaired mucociliary clearance, heightened infection risk

Cooking, traffic infiltration, combustion appliances

Ions

Positive ion predominance in closed spaces — associated with fatigue, mood dysregulation

Electronic devices, HVAC systems, synthetic materials

The Biological Cascade: From Particle to Pathophysiology

Understanding why indoor air quality matters requires following the biological chain from inhalation to systemic consequence. This is not a linear process — it is a multi-system cascade that operates simultaneously across immunological, metabolic, and neuroendocrine pathways.

01

Inhalation & deposition

PM2.5 and nanoparticles deposit deep in alveolar tissue. Ultra-fine particles translocate directly to the bloodstream and reach the liver, spleen, and brain.

02

Innate immune activation

Alveolar macrophages detect particle-associated DAMPs and bioaerosol PAMPs via TLR4 and NLRP3 inflammasome, triggering IL-1β, IL-6, and TNF-α release.

03

Systemic inflammation

Cytokines enter circulation. CRP rises. Endothelial activation increases adhesion molecule expression. The inflammatory signal reaches tissues remote from the lung.

04

Mitochondrial stress

Particulates generate reactive oxygen species that impair mitochondrial electron transport chain function — depleting NAD⁺, disrupting membrane potential, and amplifying the inflammatory loop.

This cascade is not hypothetical. A growing body of epidemiological and mechanistic evidence links chronic indoor air pollutant exposure to accelerated cardiovascular ageing, increased incidence of metabolic syndrome, impaired cognitive function, and — of direct relevance to this platform — measurable shifts in immune cell composition and inflammatory tone.4,5

Key study — particulate matter and immune dysregulation

A 2019 study published in Environmental Health Perspectives demonstrated that chronic exposure to PM2.5 at concentrations commonly found in urban indoor environments was associated with a significant shift in peripheral blood immune cell ratios — specifically, reduced natural killer cell cytotoxicity and elevated Th17/Treg ratios, consistent with a pro-inflammatory, immunosenescent phenotype.6

Crucially, these effects were observed at concentrations below current EU regulatory thresholds — suggesting that “compliant” air quality may still carry meaningful biological burden.

The Negative Ion Question: What the Evidence Actually Shows

Negative air ions — small, negatively charged oxygen molecules present in abundance near waterfalls, forests, and ocean coastlines — have been studied for decades in the context of respiratory and neurological health. The literature is heterogeneous, and clinical claims require careful evaluation. What can be stated with reasonable confidence is the following:

Air ionisation reduces airborne particulate burden. The mechanism is electrostatic: negative ions charge airborne particles, causing them to precipitate onto surfaces rather than remain suspended in breathing air. Multiple independent studies have confirmed particulate reduction efficacy, including the independent certification obtained by BIOW from ALCE Calidad S.L.7

The physiological effects of negative ion environments are biologically plausible. Serotonin metabolism, mucosal defence, and autonomic nervous system tone have all been proposed as downstream targets of ion environment. The evidence base is preliminary but consistent with a genuine environmental effect — not noise.8

Positive ion predominance in closed, electronics-rich spaces is measurable and common. The modern indoor environment — characterised by sealed windows, synthetic materials, HVAC recirculation, and dense electronics — systematically shifts ambient ion balance toward positive predominance. This is a physical fact of the contemporary indoor exposome, regardless of what we conclude about its therapeutic remediation.

The honest position is this: reducing your indoor particulate burden is clearly beneficial. The additional effects of negative ion enrichment are plausible and consistent with available evidence — but should not be overstated as established clinical outcomes.

Where This Fits in a Systems Biology Framework

From a thermodynamic and systems biology perspective, the indoor air argument is straightforward. Living systems — as dissipative structures — maintain biological organisation by continuously processing low-entropy inputs and exporting high-entropy waste. Every unnecessary environmental burden increases the metabolic cost of maintaining homeostasis.

A body breathing PM2.5-laden, positive-ion-predominant, VOC-contaminated air is allocating immune and metabolic resources to low-grade environmental defence that could otherwise support repair, regulation, and resilience. This is not a dramatic claim. It is a basic accounting of biological energy allocation.

Optimising your indoor air quality does not treat any disease. It reduces an unnecessary background burden on systems that are already managing substantial demands. In the framework of precision longevity medicine, this is precisely the kind of upstream, modifiable variable that deserves clinical attention.

A tool I personally use and have evaluated

BIOW — Air Purification for the Indoor Exposome

I evaluated BIOW over several months in both home and clinical office environments. My interest was specific: a device that addresses indoor particulate burden and ion balance without introducing ozone or secondary pollutants. What follows is my honest assessment — not a clinical endorsement.

  • Multi-stage certified filtration. The WSN10 technology combines HEPA-grade filtration with negative ion generation. Independently certified by SGS, TÜV Süd, and ALCE Calidad S.L. for particulate reduction performance.
  • ISO 13485 manufacturing standard. BIOW is manufactured under the quality management standard for medical devices — not itself a medical device, but produced to a rigorous standard that most consumer air purifiers do not meet.
  • Addresses a real and measurable gap. The indoor particulate burden it targets is well-documented and biologically consequential. This is not a wellness claim — it is an environmental fact.
  • No ozone generation. Independently verified by the University of Applied Sciences of Northwestern Switzerland. A non-trivial distinction — many ionisers produce ozone as a secondary pollutant, which introduces a different respiratory burden.

Learn more about BIOW

Affiliate link — I receive a commission if you purchase through this link, at no extra cost to you. BIOW is not a medical device and does not treat, diagnose, or prevent any disease or condition. This is not medical advice.

Practical Considerations: What Actually Moves the Needle

If you are considering addressing your indoor air quality from a biological standpoint, the evidence supports a hierarchy of interventions. Air purification is one tool in a broader strategy:

Ventilation first. The single most effective intervention for most indoor environments is controlled ventilation — opening windows during low-pollution outdoor periods to dilute accumulated indoor contaminants. Free, accessible, and consistently underused.

Source reduction. Identify and remove or reduce sources of indoor contamination: gas stoves without adequate extraction, scented candles, synthetic cleaning products, off-gassing furniture in enclosed new spaces. The particle you do not generate does not need to be filtered.

Active filtration for residual burden. In urban environments, near-road locations, or spaces where ventilation is structurally limited, active filtration addresses the residual particle burden that ventilation alone cannot manage. This is the category where air purifiers like BIOW operate — and where the evidence base for benefit is strongest.

Monitor, don’t assume. Consumer-grade indoor air quality monitors (measuring PM2.5, VOCs, CO₂, and humidity) are now accurate and affordable. Measurement transforms indoor air quality from an abstract concern into an actionable data point. I recommend measuring before investing in any intervention.

Conclusion

The exposome framework asks us to account for the totality of environmental inputs that shape biological function. Indoor air — the medium through which we absorb roughly 15,000 litres of environmental signal every day — deserves a place in that accounting.

This is not about fear. It is about honest biological bookkeeping. Every unnecessary immune activation, every mitochondrial ROS cascade triggered by a preventable particulate exposure, every gram of NAD⁺ consumed in environmental defence rather than cellular repair — these are costs that compound over years and decades.

Addressing your indoor air quality will not substitute for sleep, nutrition, exercise, or stress management. But in a systems biology framework oriented toward long-term resilience, it is a legitimate and modifiable variable — and one that most clinicians and their patients are not yet measuring.

That seems worth changing.

References

  1. Wild CP. Complementing the genome with an “exposome”: the outstanding challenge of environmental exposure measurement in molecular epidemiology. Cancer Epidemiol Biomarkers Prev. 2005;14(8):1847–50.
  2. US Environmental Protection Agency. Introduction to Indoor Air Quality. EPA 402-K-93-007. 2023.
  3. World Health Organization. Household air pollution and health. Fact sheet. Geneva: WHO; 2023.
  4. Bind MA, et al. Air pollution and markers of coagulation, inflammation, and endothelial function: associations and epigene–environment interactions in an elderly cohort. Epidemiology. 2012;23(2):332–40.
  5. Chen R, et al. Ambient air pollution and daily mortality in Shanghai, China. Sci Rep. 2013;3:1–7.
  6. Guo Q, et al. Fine particulate matter exposure and immune dysregulation: epidemiological and mechanistic evidence. Environ Health Perspect. 2019;127(9):097006.
  7. ALCE Calidad S.L. Independent Certification Report: BIOW 100 Air Quality Performance. 2021.
  8. Perez V, et al. Negative ions and mood states. A meta-analysis. PLOS ONE. 2013;8(1):e52609.

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]]> https://drpascalmensah.com/indoor-air-quality/feed/ 0 Living Systems as Dissipative Structures https://drpascalmensah.com/living-systems-as-dissipative-structures/ https://drpascalmensah.com/living-systems-as-dissipative-structures/#respond Mon, 09 Mar 2026 15:33:32 +0000 https://drpascalmensah.com/?p=19814 How do living systems maintain order in a universe that naturally tends toward disorder?
This article explores how thermodynamic principles explain biological organization, showing how cells maintain structure and function far from equilibrium through continuous energy flow, and how this framework helps interpret metabolism, ageing, inflammation and chronic disease.

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About this article

Living organisms are not static structures. They are open thermodynamic systems sustained by constant energy flux. Far from equilibrium, cells maintain order, regulate metabolism, and sustain biological organization through continuous dissipation of energy.

This article introduces the concept of living systems as dissipative structures, explaining how thermodynamic principles apply to cellular metabolism, mitochondrial energetics, and physiological regulation.

Designed as a concise scientific reference, this document connects fundamental physical laws to real biological and clinical phenomena.

Inside the article (8 sections)

1. Thermodynamic Equilibrium and Why Life Avoids It
2. Dissipative Systems: Thermodynamics of Energy Flux
3. Dissipative Structures: Order from Energy Flow
4. The Cell as an Energy-Flux Engine
5. Clinical and Pathophysiological Implications
6. Integrative Framework: The Cell as Open Thermodynamic System
7. Key Equations and Quantitative Reference
8. Conclusion

Who is this for?

  • PhD students in life sciences
  • Medical students interested in systems biology
  • Researchers studying metabolism and bioenergetics
  • Clinicians exploring integrative or systems-based medicine

Note: The full PDF is in English.

Download the complete 7-page article (PDF) – 5€

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]]> https://drpascalmensah.com/living-systems-as-dissipative-structures/feed/ 0 Thermodynamics and Mitochondria https://drpascalmensah.com/thermodynamics-and-mitochondria/ https://drpascalmensah.com/thermodynamics-and-mitochondria/#respond Wed, 25 Feb 2026 16:20:07 +0000 https://drpascalmensah.com/?p=19592 How do the laws of thermodynamics shape mitochondrial function and influence health and disease?
This article examines how fundamental physical laws govern cellular energetics, explaining mitochondrial electron flow, membrane potential, free energy and redox balance, and their implications for inflammation, adaptation and chronic disease.

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About this textbook

Every cell operates under the same physical principles that govern the universe. The mitochondrion is not merely a biological structure, but a system where energy transformation, dissipation and regulation determine cellular function.

This 35-page textbook develops a coherent framework linking thermodynamic laws to mitochondrial physiology and clinical relevance. Designed for advanced readers, it progressively connects physical principles to real biological processes.

Inside the textbook (10 chapters)

Chapter 1: The Three Laws of Thermodynamics — The Universal Rules of Energy
Chapter 2: Mitochondria as Thermodynamic Engines — Architecture and Coupling
Chapter 3: Free Energy (ΔG) — The Cellular Currency of Work
Chapter 4: The Electron Transport Chain — Where Free Energy is Harvested and Lost
Chapter 5: The Proton Motive Force and Membrane Potential (Δψ) — The Electrochemical Battery
Chapter 6: NADH, NAD+, and Redox Potential — The Nernst Equation in Biology
Chapter 7: Reverse Electron Transport, ROS, and the Danger of Hyperpolarization
Chapter 8: Thermodynamics of Inflammation — Energy Mismatch, Redox Stress, and Immune Signaling
Chapter 9: Perturbations, Drugs, and Clinical Implications
Chapter 10: Toward Integrative Medicine — Thermodynamics as a Clinical Framework

Who is this for?

  • PhD students in life sciences
  • Medical doctors seeking a deeper understanding of bioenergetics
  • Researchers interested in redox biology and mitochondrial physiology
  • Clinicians exploring integrative and systems-based approaches

Note: The full PDF is in English.

Download the complete 35-page textbook (PDF) – 10€

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]]> https://drpascalmensah.com/thermodynamics-and-mitochondria/feed/ 0 Mitochondria-Driven Tumorigenesis: A New View of Cancer Metabolism https://drpascalmensah.com/mitochondria-as-drivers-of-tumorigenesis-a-bioenergetic-perspective/ https://drpascalmensah.com/mitochondria-as-drivers-of-tumorigenesis-a-bioenergetic-perspective/#respond Sat, 14 Feb 2026 10:24:43 +0000 https://drpascalmensah.com/?p=19325 Are mitochondria active drivers of cancer development rather than secondary players? This article highlights a scientific review proposing that mitochondrial bioenergetics and redox signaling may play a central role in tumorigenesis and cancer therapy strategies.

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Mitochondria are increasingly recognized as regulators of cellular metabolism, immune signaling, and redox balance. This review explores how mitochondrial reprogramming may actively drive tumor development and influence responses to immunotherapy.

Read the full article here

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]]> https://drpascalmensah.com/mitochondria-as-drivers-of-tumorigenesis-a-bioenergetic-perspective/feed/ 0 Fasting-mimicking diet and cell “self-cleaning” in humans https://drpascalmensah.com/fasting-mimicking-diet-and-cell-self-cleaning-in-humans/ https://drpascalmensah.com/fasting-mimicking-diet-and-cell-self-cleaning-in-humans/#respond Mon, 09 Feb 2026 16:14:20 +0000 https://drpascalmensah.com/?p=19210 Can a fasting-mimicking diet activate cellular self-cleaning and improve metabolic health? This article explores a clinical trial in healthy adults examining how a fasting-mimicking diet affects blood sugar, insulin and autophagy, the cell’s internal recycling system linked to aging and disease.

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Study Overview

This pilot randomized clinical trial investigated the effects of a fasting-mimicking diet (FMD) on metabolic health and autophagic activity in healthy adults.

  • 30 healthy adults were randomized to two versions of an FMD (ProLon or FMD2) or a normal-diet control for 8 days, with 5 days on the low-calorie FMD and then re-feeding (Espinoza et al., 2025).
  • The FMD was plant-based, low-calorie, low-protein, low-sugar and high in unsaturated fats, designed to mimic water-only fasting while still providing nutrients (Espinoza et al., 2025).

What they measured and found

  • Metabolic markers: body weight, fasting glucose, insulin, IGF-1, ketone bodies (β-hydroxybutyrate), and insulin resistance (HOMA-IR) (Espinoza et al., 2025).
  • Autophagy: “autophagicflux”in blood immune cells, using LC3B-II/LC3B-I protein ratios with and without chloroquine treatment (Espinoza et al., 2025)

Compared with controls after 6 days:

  • FMD groups lost weight and had lower fasting glucose, insulin, HOMA-IR, and higher ketones (all statistically significant) (Espinoza et al., 2025).
  • One formulation (ProLon) showed a pattern consistent with increased autophagic flux persisting even 2 days after re-feeding (Espinoza et al., 2025).

Big picture

The article presents early human evidence that a short, periodic fasting-mimicking diet can improve metabolic markers and may enhance autophagy, suggesting a potential non-drug strategy to influence aging-related pathways and healthspan.

References

Read the study
Espinza, S., Park, S., Connolly, G., Qi, W., Zhang, N., Sembla, M., Li, Y., Lauzon, M., Salmon, A., Hsu, W., Wei, M., & Musi, N. (2025). Ef ect of fasting-mimicking diet on markers of auto-Nagy and metabolic health in human subjects.. GeroScience. 

These search results were found and analyzed using Consensus, an AI-powered search engine for research. Try it at https://consensus.app. © 2026 Consensus NLP, Inc. Personal, non-commercial use only; redistribution requires copyright holders’ consent.

Learn more about the fasting-mimicking diet used in this study

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]]> https://drpascalmensah.com/fasting-mimicking-diet-and-cell-self-cleaning-in-humans/feed/ 0 Heritability of intrinsic human life span is about 50% https://drpascalmensah.com/human-lifespan-heritability/ https://drpascalmensah.com/human-lifespan-heritability/#respond Mon, 02 Feb 2026 13:06:53 +0000 https://drpascalmensah.com/?p=18774 What does genetics really control in aging, and where does lifestyle take over? This article explores how DNA, environment, and personalized prevention interact to shape human longevity.

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Recent advances in aging research are reshaping how we understand longevity. A landmark study published in Science shows that when deaths from external causes such as infections, accidents, and environmental hazards are mathematically removed, up to 50–55% of human lifespan variability appears to be genetically determined. This does not mean that our fate is written in our DNA—but it does mean that biology matters more than we previously thought.

Genetics set the baseline. They influence how efficiently we repair DNA, manage inflammation, detoxify pollutants, regulate metabolism, and respond to stress. In other words, they define the starting conditions of our aging process. Yet genes are not destiny. They are instructions whose expression is constantly shaped by lifestyle, environment, and metabolic health.

This is precisely where personalized medicine begins. Most of the interventions that protect longevity—nutrition, physical activity, sleep, stress regulation, toxin avoidance, targeted supplementation—do not alter DNA sequences. They act on gene expression, mitochondrial function, immune balance, and metabolic resilience. Knowing your genetic profile allows these interventions to be more precise, more effective, and safer.

Think of genes as defining the ceiling of your biological potential. Lifestyle determines how close you get to that ceiling—and how many years you live with vitality rather than chronic disease. Importantly, individuals with higher genetic risk often stand to benefit more, not less, from early and well-designed preventive strategies.

Checking your DNA is not about predicting illness or creating anxiety. It is about understanding your unique biology, anticipating vulnerabilities, and making informed choices that support long-term health. When genetics and lifestyle are aligned intelligently, longevity becomes not just longer—but better.

Read the original study published in Science
Ben Shenhar et al. ,Heritability of intrinsic human life span is about 50% when confounding factors are addressed.Science391,504-510(2026).DOI:10.1126/science.adz1187

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]]> https://drpascalmensah.com/human-lifespan-heritability/feed/ 0 Understanding Your Immune System’s Non-Heritable and Heritable Responses https://drpascalmensah.com/understanding-your-immune-system/ https://drpascalmensah.com/understanding-your-immune-system/#respond Sat, 04 Nov 2023 17:05:53 +0000 https://drpascalmensah.com/?p=9247 How does your immune system adapt to environmental challenges? This article explains how non-heritable and heritable factors influence immune responses and help your body stay balanced and healthy.

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Understanding Your Immune System’s Non-Heritable and Heritable Responses is key to taking actionable steps to support healthy adaptation in everyday life. Through adaptation, your body can better defend against potential threats, keeping you healthy and strong and maintaining a good balance of homeostasis. This post will explore the topic calmly and informally, focusing on understanding and supporting your immune system best. (Keywords: adaptation, health, immune system).

Read the original study published in Cell
Brodin, P., Jojic, V., Gao, T., Bhattacharya, S., Angel, C. J. L., Furman, D., … & Davis, M. M. (2015). Variation in the human immune system is largely driven by non-heritable influences. Cell, 160(1-2), 37-47. 

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]]> https://drpascalmensah.com/understanding-your-immune-system/feed/ 0 National Geographic speaks about Fast-Mimicking diet https://drpascalmensah.com/fast-mimicking-diet/ https://drpascalmensah.com/fast-mimicking-diet/#respond Tue, 08 Aug 2023 12:01:14 +0000 https://drpascalmensah.com/?p=9332 Can a 5-day fast-mimicking diet improve longevity? This article explores how it mimics fasting to support health, based on scientific research and insights from long-lived communities.

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Fasting has long been linked to health and longevity, and new research suggests that even a diet that mimics fasting can have similar benefits. By tricking the body into a fasting state, this approach may support metabolic health, cellular repair, and overall well-being. Insights from populations with high numbers of centenarians help illustrate how dietary patterns can influence life span.

Read the original article on National Geographic
Fran Smith, Can fasting help you live longer? Here’s what the science says., National Geographic, January 17, 2023.

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