Paper 50 — Transformation

The body becomes what it reads, and it reads only through the machinery it already has. What it cannot read does not leave it alone.

Abstract

The human body is in flux. It's reacting with its environment constantly both internally and externally. The body turns signals into matter and matter into signals. The chemistry it evolved among, it puts to use; however, in the last century more unfamiliar substances are being introduced. Some are rejected, some are converted, and others are either mistaken for something familiar or cannot register at all. Sometimes we evolve to accommodate what originally may have not been useful into something we need. This is the perhaps unexpected, but ever-changing environment where we evolve into what we are and what we are becoming, whether or not we are made aware of it.

1. Coevolved Chemistry

Life evolved in contact with chemistry. Every organism alive carries the imprint of selection under specific chemical conditions: enzymes acquired their active sites through iterative encounters with substrates, receptors developed binding pockets by responding to particular ligands, transporters were shaped by the ions they had to move. The chemistry of the environment did not merely surround life; it participated in shaping the machinery that reads it.

The lanthanide-dependent methanol dehydrogenases of methylotrophic bacteria show this cleanly. The enzyme XoxF holds a rare-earth atom in its active site, in place of the calcium occupying the equivalent position in its evolutionary cousin MxaF. When lanthanum, cerium, praseodymium, or neodymium is available, methylotrophs preferentially express the lanthanide form and gain measurable growth. Phylogenetic analysis suggests the lanthanide-dependent form is the ancestral one. Rare earths are physiological requirements for these organisms, read by binding sites built to accommodate them, and the role of these bacteria in the global methane and methanol cycles connects landscape chemistry to atmospheric composition.

Mammalian responses to plant metabolites carry the same signature. Salicylate, the active metabolite of aspirin and a defense compound of willow and meadowsweet, inhibits the acetyltransferase EP300 in mammalian cells and induces autophagy through the same caloric-restriction pathway that fasting uses (Pietrocola et al., 2018). It did not emerge as a pharmaceutical but as an environmental signal that mammals coexisting with salicylate-producing plants have read for millions of years; the apparatus that reads it was present the entire time. Dietary polyphenols show the same: epigallocatechin gallate inhibits DNMT1, theaflavins and chlorogenic acid inhibit DNMT3a, and apigenin inhibits DNA and histone methyltransferases together, all at concentrations that occur in blood after ordinary food.

None of this means coevolved chemistry is uniformly benign. Many substances organisms have long encountered are toxic in quantity, and the systems that read them include the systems that manage their damage. Hormesis, the biphasic response in which low doses stimulate and higher doses inhibit, is documented for lanthanum, cerium, and numerous plant compounds. The signature of a tuned reader is a response calibrated across a range of doses to something specific about the compound. Coevolved chemistry is chemistry the body knows how to read, whether the reading leads to nourishment, defense, or damage control.

2. The Field

Chemistry reaches an organism as more than a list of elements at listed concentrations. The form each substance takes, the dose it arrives at, the compounds present alongside it, and the matrix carrying it all shape what signal reaches the receiving apparatus.

Speciation is the chemical form a substance takes in solution. Rare-earth toxicity is typically measured with free ionic solutions at defined concentrations, but in natural waters rare earths occur mostly as complexes with humic and fulvic acids; the free-ion fraction is small. Because complexation reduces bioavailability, thresholds from free-ion studies do not transfer to environmental exposure. The element is the same; the field it exists in is not.

Dose modulates response past what any single safe level can capture. Lanthanum and cerium have been used at low doses in Chinese agriculture since the 1980s because they promote seedling growth and yield; at higher doses the same compounds inhibit the same processes. A threshold set at either end of a hormetic curve describes only that end.

Combinations produce responses the components do not predict. Joint effects can be additive, antagonistic, or synergistic and can invert with dose. Systematic reviews find synergy greater than two-fold in roughly five percent of tested combinations (Cedergreen, 2014), but the reviewers note the estimate reflects experiments biased toward finding it, and where synergy occurs its magnitude can reach a hundred-fold. The commonest mechanism is metabolic: one compound changes how the body processes another, changing the field the second is read against. Real exposures involve dozens to hundreds of compounds at once, most untested in combination, and whole-mixture testing is unworkable for a class like PFAS with fifteen thousand variants.

The starkest case is the most familiar substance. Water sustains every cell in the body, but infused directly into the blood without the solutes that balance it, it pulls water across the red-cell membrane until the cells burst. Nothing about the water changed; only the field it arrived in did. Same substance, different field, different meaning.

3. Novel Chemistry

Some compounds entered the biosphere only within the last century, manufactured for industrial properties: heat resistance, water and oil repellence, chemical inertness. The bodies that carry them arose where these molecular shapes did not exist, and the readers of chemistry evolved without them as a selective pressure. When these compounds arrive, they are interpreted with capacity built for their nearest natural analogues.

Per- and polyfluoroalkyl substances are the clearest current example. The class comprises more than fifteen thousand variants sharing a carbon-fluorine backbone that gives extreme stability and both hydrophobic and lipophobic character. Serum half-lives run in years: about 3.8 for PFOA, 5.4 for PFOS, and 8.5 for PFHxS (Olsen et al., 2007), with some later studies estimating longer still. They cross the placenta, appear in breast milk, and are measurable in essentially every human tested.

Their biological activity has been characterized by receptor docking. A 2024 screen of 9,507 variants against PPARγ, PXR, VDR, and estrogen receptor α found strong binding across the class at both orthosteric and allosteric sites (Roy et al., 2024). The hydrophobic fluorinated backbones resemble the endogenous nonpolar ligands these receptors evolved to bind closely enough to occupy the ligand-binding domain and displace the natural ligand. The receptor is activated, partially or fully, but the downstream signal carries no coherent information: the compound does not degrade on the signal's timescale, does not report completion, and does not release the receptor on schedule. This is molecular mimicry without meaning. The consequences propagate through the systems those receptors regulate, PPARα and PPARγ into lipid metabolism and hepatic function, the sex-steroid receptors into reproduction, and PXR and CAR into xenobiotic metabolism, where PFAS binding changes how the body processes other compounds and so changes the field even for substances it could otherwise handle.

Microbial degradation is limited by chemistry and by evolution. The carbon-fluorine bond is among the strongest in organic chemistry, and cleaving it releases fluoride toxic to the cell doing the cleaving, so selection acts against any lineage that begins to metabolize PFAS. The strains capable of partial defluorination use enzymes evolved to metabolize caffeate and work only on variants with carbon-carbon double bonds adjacent to the fluorinated portion, not the saturated perfluoroalkyls that dominate exposure. PFAS have not existed long enough for organisms to have evolved the capacity to digest them. The regulatory picture reflects this: a few dozen of fifteen thousand variants have substantive toxicological characterization, only Sweden and Denmark have multi-compound drinking-water limits, and new variants such as GenX are introduced to replace restricted ones and then found to produce the same hepatic and reproductive effects.

4. The Voltage Underneath

Beneath receptor signaling and DNA methylation lies an older layer of instruction. Every cell maintains a resting membrane potential, a voltage set by ion channels and pumps across the cell membrane. This voltage is not idle. Two decades of work have shown that it regulates proliferation, differentiation, migration, and apoptosis in cells that are not neurons, and that voltage gradients across tissues carry positional information used during morphogenesis and regeneration. Altering the voltage pattern can trigger regeneration in tissues that otherwise would not regenerate, and specific patterns are required for correct form to return. Electrical signaling of this kind predates the nervous system; neuronal communication is a specialization of a far older cell-to-cell electrical system that never stopped running in every tissue.

The membrane potential is a boundary condition in the literal sense: charge separated across a membrane. The information it carries is held by the physics of that separation and reliably shapes what forms. No cell is instructed by a pattern reaching toward it; the voltage at the boundary sets the conditions, and the tissue re-establishes its pattern against them, the way a wound restores its voltage gradient before it rebuilds. Coevolved chemistry generally does not scramble this layer at the doses organisms met it in, and where coevolved compounds touch ion channels they tend to do so in ways the receiver side can interpret. Novel chemistry has no such interpretation, and two classes disrupt the voltage directly.

Rare-earth elements are potent ion-channel blockers. Trivalent lanthanide ions share calcium's ionic radius but carry a higher charge, so they lodge in calcium sites and do not leave. Lanthanum, cerium, gadolinium, neodymium, holmium, erbium, ytterbium, and yttrium block voltage-gated calcium channels at sub-micromolar to micromolar concentrations; gadolinium is the standard experimental blocker of stretch-activated channels and also fully blocks L-type calcium channels at the same concentrations, which means the "specific" reagent is not specific. Lanthanides also inhibit calcium and magnesium ATPases and calcineurin. This bears on a clinical exposure hiding in plain sight: gadolinium from MRI contrast agents deposits and remains in brain, bone, skin, and kidney for months to years, and its clinical significance is described as unclear. That description reflects what is measured, cognitive symptoms and imaging findings, not the resting membrane potential of the tissues where a retained calcium-channel blocker now sits.

PFAS disrupt membrane potentials directly, not only through receptors. Perfluorinated acids depolarize the plasma membrane and acidify the cytosol in a dose- and chain-length-dependent way; at fifty micromolar over seventy-two hours, PFDoDA produced about a fifty-one percent depolarization and dropped cytosolic pH from 7.4 to 6.03 (Kleszczynski et al., 2009). They uncouple and disrupt mitochondrial membrane potential, alter lipid-bilayer packing in ways that change the function of embedded channels and receptors even without binding them, and disturb calcium handling. A 2026 review has proposed PFAS-induced ion-channel dysfunction as a mechanism that could underlie cardiac arrhythmias, including atrial fibrillation, in exposed populations.

The synthesis is straightforward and belongs, by the discipline of this work, in the proposed column. If the resting voltage across the membrane is part of how the body instructs regeneration, then compounds that block calcium channels and depolarize membranes are interfering with that instruction, not by binding a receptor and sending a garbled message but by degrading the electrical boundary condition itself. This sits underneath the receptor and epigenetic effects already described: the maintenance intelligence that unlocks regeneration genes and recycles damaged structure depends on a voltage pattern that persistent synthetic chemistry can flatten. The measured facts, lanthanide channel blockade and PFAS depolarization, are established in vitro. The inference that they disrupt morphogenetic bioelectric signaling at exposure-relevant doses in living tissue is proposed, and it is proposed precisely because the endpoint is not measured. No standard toxicological panel records resting membrane potential, and no regulatory framework requires it, so the one layer where the disruption would show is the one layer nobody is reading.

5. The Maintenance Intelligence

The regenerative and maintenance systems that evolved in contact with coevolved chemistry actively sort, transform, and rebuild from whatever field they are given. Autophagy is not only a defense. It is the active recycling of damaged organelles and proteins back into the amino acids and lipids from which new structure is built, and it engages when PFAS accumulate and uncouple mitochondrial function. Studies in lung, renal tubular, and ovarian granulosa cells show PFAS inducing autophagy dose-dependently, and blocking it pharmacologically or genetically increases cell death. The response is genuine, protective, and constructive. It is also incomplete: autophagy clears the collateral damage the PFAS caused, and it does not clear the PFAS. The compound remains after the remediation, and the exposure continues.

This marks the edge of what the maintenance intelligence can do by clearance. The disposal machinery evolved for compounds that fit recognized routes, proteins tagged with ubiquitin, lipids run through beta-oxidation, xenobiotics conjugated with glutathione or glucuronic acid and excreted in bile or urine. Compounds without a recognizable disposal pathway enter these systems, are handled as well as they can be, and do not leave at meaningful rates. The same holds at the receptor: an endogenous or coevolved ligand is metabolized on a schedule matching the signal's intended duration, while a persistent synthetic holds the receptor activated, or blocked, on a timescale set by its own half-life. And underneath both, as Section 4 argued, the voltage the whole intelligence relies on can be flattened by chemistry no clearance pathway removes.

The intelligence still runs. The regenerative capacity documented in prior work remains intact: fasting still activates autophagy, autophagy still suppresses DNA methyltransferase activity, demethylation still answers the local damage signal. What has changed is not the mechanism but the field, which now includes substantial input the mechanism was not shaped by, at a layer it cannot repair by clearance alone.

6. The Fluid Inside

Cerebrospinal fluid carries chemistry through the body the way water carries chemistry through a landscape. Adults make four hundred to six hundred milliliters a day and cycle the whole volume four or five times in twenty-four hours, from the ventricles through the central canal into the subarachnoid space and out through lymphatic drainage, the flow modulated continuously by arterial pulsation, respiration, sleep position, and spinal posture. What it carries is more than waste: it functions as a volume-transmission system for neuropeptides, neuroactive substances, and immune signals that reach distant regions by traveling with the fluid rather than across synapses, with the choroid plexus concentrating signals into it at production and surveilling the blood-CSF interface.

Specialized neurons line the central canal in direct contact with the fluid and read three things at once. They detect pH, osmolarity, and bacterial metabolites as chemoreceptors; they detect CSF pressure and flow through Pkd2l1 ion channels as mechanoreceptors; and they detect spinal curvature through contact with the Reissner fiber, an extracellular polymer running the length of the canal. When curvature or pressure is sensed, they release urotensin neuropeptides that flow with the fluid to skeletal muscle and induce the contractions that adjust posture. These readers operate through membrane potentials, which is to say the internal fluid network and the electrical layer of Section 4 are one system, not two: what the fluid carries changes what its readers detect, and what its readers detect they answer with a bioelectric signal.

The glymphatic system extends this into brain tissue. Cerebrospinal fluid enters along the outsides of arteries, mixes with interstitial fluid through aquaporin-4 channels on astrocyte endfeet, and exits along veins carrying the waste of neural activity, including amyloid-beta, tau, and alpha-synuclein, with the exchange enhanced during sleep. What arrives in the plasma eventually reaches this fluid; what accumulates in one field accumulates in the other. The internal signaling network is downstream of the external chemical field and responds to it the same way it responds to physical state, by altering what it carries and what its readers find.

7. Reproductive Endpoints

Reproduction is the body's most complete act of transformation. It takes chemistry from food, water, and internal reserves and assembles an entire new organism, integrating endocrine, immune, metabolic, and developmental signaling, and, in gamete and early embryo development, the bioelectric patterning of Section 4. That integration is exactly why reproductive endpoints are the most sensitive population-scale readout of a changed field: effects that would take decades to surface elsewhere can appear in reproductive statistics within a generation.

The declines are best read as interference with that active process rather than as the process's whole story. The 2022 systematic review by Levine and colleagues found global sperm concentration down about 51.6 percent between 1973 and 2018, with the rate accelerating after 2000 from roughly 1.16 to 2.64 percent a year, across 223 studies of 57,000 men in 53 countries; the extension of the finding beyond North America, Europe, and Australia to the rest of the world suggests globally present causes. Testosterone has declined one to two percent a year across diverse populations independent of age. The interpretation is contested at the edges, with methodological critiques and studies of proven-fertile men showing stable counts, and the aggregate signal in unselected men is robust.

The molecular route has been characterized. PFAS bind receptors in the hypothalamic-pituitary-gonadal axis and disrupt gonadotropin signaling: in females reducing FSH and LH, inhibiting androgen and estradiol production, and impairing folliculogenesis and oocyte quality; in males inhibiting testosterone, reducing sperm concentration and motility, and altering morphology. The cellular mechanisms include apoptosis and autophagy in spermatogenic cells, oxidative stress and calcium-channel disturbance in sperm membranes, the same calcium-handling layer Section 4 describes, and degradation of Sertoli-cell junctions. The effective doses are low: mice drinking water at 0.6, 2.8, or 4.4 nanograms per liter, all below current guidelines, showed dose-dependent impairment of oocyte quality and embryo development (Winstanley et al., 2024); the Danish cohort found in-utero PFOA associated with lower sperm count in the exposed sons at ages 19 to 21 (Vested et al.); and Veneto surveillance shows residence duration correlating with sperm alterations in exposed men. Populations on different water sources face different fields and different risks, treated municipal water carrying disinfection byproducts, agricultural surface water carrying pesticides and nitrates, natural groundwater carrying the mineral signature of its geology, and the comparison across fields at population scale has not been rigorously performed.

8. What Can and Cannot Be Known

Characterizing a chemical field at the resolution causal claims require is intrinsically hard. The combinations grow combinatorially: a hundred compounds make roughly five thousand pairs and a hundred sixty thousand triplets, and testing every binary would still not predict the higher-order combinations real exposures represent. Component-based approaches proceed by structural-similarity assumptions that can fail in either direction, a compound assumed benign proving toxic or the reverse.

The endpoints chosen define what safety means. A compound may be safe against acute mortality at concentrations that impair reproduction, safe in adult animals at concentrations that disrupt fetal development, safe short-term at concentrations that accumulate over chronic exposure. Endpoints that are hard to measure, slow to manifest, or developmentally subtle receive less regulatory weight than clear acute toxicity. The membrane-potential effects of Section 4 are the sharp case: resting voltage and ion-channel function are not in standard toxicological panels, and an endpoint that is not measured cannot define safety, so the electrical layer falls outside what approval assays detect.

Confounders in human observation are large, diet, exercise, sleep, stress, socioeconomic status, air pollution, and occupational exposure all correlating with each other and with the exposures under study, and the populations most useful for clean contrasts, with distinct exposures and otherwise similar characteristics, are rare. And the safe-level concept itself assumes monotonic dose-response, which does not hold for many endocrine-active compounds: nonmonotonic curves mean a compound safe at high doses may act at low ones. None of this makes the science inadequate to inform decisions. It means the decisions are made in the presence of characterized uncertainty, and that better characterization of what is not known is itself a contribution.

9. What Is Not Being Looked For

Alongside the intrinsic limits are structural ones, contingent on decisions about what to study, fund, and disclose.

The Toxic Substances Control Act of 1976 grandfathered roughly sixty thousand chemicals already in commerce, exempting them from the review it established for new ones. In nearly five decades the EPA has required safety testing on about two hundred of them, roughly a third of one percent. The 2016 Lautenberg amendments were meant to strengthen review; as of early 2026 about ninety-two percent of new-chemical premanufacture notices exceeded the ninety-day statutory window and roughly two-thirds had been pending more than a year.

What manufacturers knew has emerged through litigation. A 2023 UCSF study in Annals of Global Health analyzed thirty-nine internal DuPont and 3M documents from 1961 to 2006, obtained in discovery in Robert Bilott's class action (Gaber et al.): animal studies from the 1950s and 1960s showing toxicity, a 1961 Stanford finding that fluorinated compounds bound human blood proteins, 1960s memos on accumulation in worker blood, and 1970s and 1980s organ and carcinogenicity findings, recording many instances where findings went unpublished and unreported to the EPA as law required. In 1997, 3M placed a cancer warning on a product's safety data sheet citing its own studies, removed it within the year, and sold the product for roughly two more decades. The authors compared the pattern to the tobacco playbook of funding methodological objection rather than disclosing.

Funding source affects the literature itself: industry-funded nutrition studies were about seven times more likely to report sponsor-favorable conclusions (Lesser et al., 2007), and investigators with financial ties more likely to report positive trial outcomes (Ahn et al., 2017), through editorial-board placement, uncertainty-amplifying research, and animal strains chosen for reduced sensitivity. These do not invalidate the literature; they mean reading it responsibly requires attention to who paid for what. And the bioelectric endpoint compounds the point: nobody, in the environmental-health field or the regulatory apparatus, measures it, so the voltage disruption of Section 4 is not merely unregulated but unlooked-for. The absence of research on reproductive outcomes in populations relying on clean natural water reflects that funding follows regulatory dispute rather than exposure contrast.

10. Transformation

Chemistry moves continuously through every landscape and every body. Rock weathers into ions that redistribute by pH and redox; plants take up minerals and transform them into organic compounds; microbes transform those into others; animals consume and transform them again. Salicylate in willow bark becomes salicylic acid in the liver and then an inhibitor of EP300 in the cell. Iron consumed as food becomes hemoglobin and the active site of the enzymes that strip methyl groups from DNA. Nothing in the chemistry of life is a final form; every substance is somewhere in the middle of a process that produces the next.

The body reads and remakes all of it as it happens. Receptors bind ligands and release them, enzymes convert substrates to products, transporters move ions across gradients that change with what is moved, and the resting voltage across each membrane holds and reshapes as the ions shift. The apparatus that reads coevolved chemistry is intact in every human alive, and the signaling continues. Synthetic chemistry now occupies part of the same field. Some of it is read accurately enough to produce a response; some misreads into endocrine, immune, and reproductive disruption; some persists on timescales no signal intends; and some flattens the voltage the body uses to instruct repair. The maintenance intelligence keeps running against all of it and does real work in the process, autophagy still activating, regeneration genes still reactivating when conditions permit, the body still sorting what functions from what does not.

No field is neutral. The pathogen risks of untreated water are real, the byproduct risks of treated water are real, the mineral and toxicant risks of natural sources are real, and the persistence, receptor-binding, and voltage risks of industrial chemistry are real. The question is not which field is safe but which set of trade-offs a given body is embedded in, and what it can transform, clear, and rebuild from within the specific chemistry, and the specific voltage, it is reading. Chemistry the body evolved to read arrives daily, and chemistry it did not evolve to read arrives daily as well, and the machinery keeps running in both, not perfectly and not without cost. The field determines the signal, the signal determines the response, and the response determines what the body becomes.

What is not yet settled is what decides which signal a given field yields, and which form holds once it does. It appears to turn on the conditions at the boundaries where one chemistry meets another — which is its own question, and the next one.

References

FLUX Papers
- Paper 41 — Breakthrough. Form follows the energy conditions at a boundary; where the field at a boundary retains information, the shaping is the physics at the boundary rather than an agent, and reconstitution at boundaries produces the forms selection acts on. Referenced as the framework underlying the membrane-potential-as-boundary-condition treatment in Section 4; its content is not reproduced here.
- Paper 49 — Signal. Regeneration as suppressed capacity; DNMT3a as the maintained lock; autophagy, dietary compounds, vitamins A and C, and 670nm light as pathways of unlocking; the local damage signal as the address for global demethylation.

Scientific Literature — Coevolved Chemistry & Lanthanide Enzymes
- Pol, A. et al. (2014). "Rare earth metals are essential for methanotrophic life in volcanic mudpots." Environmental Microbiology, 16(1):255-264.
- Good, N.M. et al. (2018). "Investigation of lanthanide-dependent methylotrophy." bioRxiv, 10.1101/329011.

Scientific Literature — Salicylate and Coevolved Plant Chemistry
- Pietrocola, F. et al. (2018). "Aspirin Recapitulates Features of Caloric Restriction." Cell Reports, 22(9):2395-2407. Salicylate induces autophagy by inhibiting the acetyltransferase EP300.

Scientific Literature — Dietary DNMT Inhibitors
- PMC (2025). "A Systematic Review of Food-Derived DNA Methyltransferase Modulators."
- Rajavelu, A. et al. (2011). "The inhibition of the mammalian DNA methyltransferase 3a (Dnmt3a) by dietary black tea and coffee polyphenols." BMC Biochemistry, 12:16.
- Pandey, M. et al. (2016). "Dietary Flavones as Dual Inhibitors of DNA Methyltransferases and Histone Methyltransferases." PLOS ONE.

Scientific Literature — REE Speciation, Hormesis, and Mixture Toxicology
- Pourret, O. et al. (2007). "Rare earth element organic complexation with humic acid in natural waters." Geochimica et Cosmochimica Acta.
- Agathokleous, E., Kitao, M., Calabrese, E.J. (2019). "Hormetic dose responses induced by lanthanum in plants." Environmental Pollution.
- Ramírez-Olvera, S.M. et al. (2018). "Biostimulant Response of Foliar Application of Rare Earth Elements on Physiology, Growth, and Yield of Rice."
- Cedergreen, N. (2014). "Quantifying Synergy: A Systematic Review of Mixture Toxicity Studies within Environmental Toxicology." PLOS ONE, 9(5):e96580.

Scientific Literature — PFAS Receptor Binding, Persistence, and Degradation
- Roy, S. et al. (2024). "Large-Scale Screening of Per- and Polyfluoroalkyl Substance Binding Interactions and Their Mixtures with Nuclear Receptors." International Journal of Molecular Sciences, 25(15):8241. Screening of 9,507 variants across PPARγ, PXR, VDR, ERα.
- Olsen, G.W. et al. (2007). "Half-Life of Serum Elimination of PFOS, PFHxS, and PFOA in Retired Fluorochemical Production Workers." Environmental Health Perspectives, 115(9):1298-1305.
- Attema, B. et al. (2022). "Replacement PFAS are potent modulators of lipogenic and drug-metabolizing gene expression in primary human hepatocytes." Toxicology and Applied Pharmacology.
- Yu, Y. et al. (2022). "Microbial defluorination of unsaturated per- and polyfluorinated carboxylic acids." Science Advances.

Scientific Literature — Bioelectric Signaling and Ion-Channel Disruption
- Levin, M. (2021). "Bioelectric Signaling: Reprogrammable Circuits Underlying Embryogenesis, Regeneration, and Cancer." Cell, 184(8):1971-1989.
- McLaughlin, K.A. & Levin, M. (2018). "Bioelectric signaling in regeneration: Mechanisms of ionic controls of growth and form." Developmental Biology, 433:177-189.
- Pietak, A. & Levin, M. (2018). "Bioelectrical control of positional information in development and regeneration." Progress in Biophysics and Molecular Biology, 137:52-68.
- Pałasz, A. & Czekaj, P. (2000). "Toxicological and cytophysiological aspects of lanthanides action." Acta Biochimica Polonica, 47(4):1107-1114.
- Yang, X.C. & Sachs, F. (1989). "Block of Stretch-Activated Ion Channels in Xenopus Oocytes by Gadolinium and Calcium Ions." Science, 243:1068-1071.
- Lansman, J.B. (1990). "Blockade of current through single calcium channels by trivalent lanthanide cations." Journal of General Physiology, 95:679-696.
- Biagi, B.A. & Enyeart, J.J. (1990). "Gadolinium blocks low- and high-threshold calcium currents in pituitary cells." American Journal of Physiology, 259:C515-C520.
- Kleszczynski, K. et al. (2009). "Mechanism of cytotoxic action of perfluorinated acids. I. Alteration in plasma membrane potential and intracellular pH level." Toxicology and Applied Pharmacology, 234(3):300-305.
- Kleszczynski, K. & Skladanowski, A.C. (2009). "Mechanism of cytotoxic action of perfluorinated acids. II. Disruption of mitochondrial bioenergetics." Toxicology and Applied Pharmacology.
- Plantier, M. et al. (2026). "Per- and Polyfluoroalkyl Substances (PFAS) Within the Exposome: Cellular and Molecular Mechanisms Underlying a Potential Risk for Cardiac Arrhythmias and Atrial Fibrillation?" Cells, 15(8):696.
- Ebrahimi, V. et al. (2025). "Biophysical Consequences for Exposure of Model Cell Membranes to Perfluoroalkyl Substances." Journal of Physical Chemistry B.

Scientific Literature — CSF, Glymphatic System, and CSF-Contacting Neurons
- Veening, J.G. & Barendregt, H.P. (2010). "The regulation of brain states by neuroactive substances distributed via the cerebrospinal fluid; a review." Cerebrospinal Fluid Research.
- Iliff, J.J. et al. (2012). "A paravascular pathway facilitates CSF flow through the brain parenchyma and the clearance of interstitial solutes." Science Translational Medicine.
- Zhang, X. et al. (2018). "Cilia-driven cerebrospinal fluid flow directs expression of urotensin neuropeptides to straighten the vertebrate body axis." Nature Genetics, 50:1666-1673.
- Sternberg, J.R. et al. (2018). "Pkd2l1 is required for mechanoception in cerebrospinal fluid-contacting neurons and maintenance of spine curvature." Nature Communications.
- Xie, L. et al. (2013). "Sleep drives metabolite clearance from the adult brain." Science, 342:373-377.

Scientific Literature — Reproductive Endpoints
- Levine, H. et al. (2022). "Temporal trends in sperm count: a systematic review and meta-regression analysis." Human Reproduction Update, 29(2):157-176.
- Vested, A. et al. (2013). "Associations of in Utero Exposure to Perfluorinated Alkyl Acids with Human Semen Quality and Reproductive Hormones in Adult Men." Environmental Health Perspectives, 121(4):453-458.
- Winstanley, Y.E. et al. (2024). "Drinking water quality impacts oocyte viability and embryo development." Frontiers in Reproductive Health, 6:1394099. PFAS at 0.6–4.4 ng/L, within stated safe-level guidelines.
- Bertola, F. et al. (2025). "Reproductive health of young men living in PFAS contaminated areas: planned ad-interim data analysis." Epidemiologia & Prevenzione, 49(1):63–73. Veneto surveillance (interim analysis; residence duration associated with sperm motility/morphology).

Scientific Literature — Regulatory Architecture, Industry Documentation, and Funding Bias
- Gaber, N. et al. (2023). "The devil they knew: chemical documents analysis of industry influence on PFAS science." Annals of Global Health, 89(1):37.
- Environmental Working Group (2016). "Off the Books II: More Secret Chemicals." TSCA grandfathering analysis.
- American Chemistry Council (2026). "TSCA New Chemicals Review Tracking." PMN backlog data as of early 2026.
- Lesser, L.I. et al. (2007). "Relationship between Funding Source and Conclusion among Nutrition-Related Scientific Articles." PLOS Medicine, 4(1):e5.
- Ahn, R. et al. (2017). "Financial ties of principal investigators and randomized controlled trial outcomes." BMJ, 356:i6770.
- vom Saal, F.S. & Hughes, C. (2005). "An extensive new literature concerning low-dose effects of bisphenol A shows the need for a new risk assessment." Environmental Health Perspectives, 113:926-933.

ΑΩ ad infinitum ∞