Mutflash - Medizinische Argumentationen und Studiensammlungen
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Mutflash - Medizinische Argumentationen und Studiensammlungen
One particularly intriguing aspect of the transcriptional response is the prominent regulation of S100a8, which the authors mention only briefly in the context of neutrophil chemotaxis, together with Cxcl2 and Cxcr2. This finding may deserve substantially…
S100A8 is not merely an inflammatory marker or a mediator of myeloid-cell recruitment; independent biophysical work has demonstrated that apo-S100A8 can directly interact with anionic lipid membranes and exert a detergent-like membrane-disruptive effect. In model membranes, this activity was strongly dependent on lipid composition, with pronounced membrane leakage observed in phosphatidylserine-containing bilayers, whereas zwitterionic DOPC/cholesterol membranes were comparatively resistant. This observation is potentially relevant to the present findings because it suggests that S100A8 may participate in a feed-forward mechanism in which an initial disturbance of cellular membrane homeostasis promotes inflammatory S100A8 production, while the resulting accumulation of S100A8 may in turn further perturb susceptible cellular membranes. The present study does not establish such a mechanism, and the membrane experiments were performed in a distinct experimental system; nevertheless, the convergence of these observations is notable. In particular, the authors report substantial pulmonary inflammatory recruitment and increased BALF protein and cellularity, whereas the increase in LDH is comparatively modest, indicating that the magnitude of the cellular and inflammatory response is not accompanied by proportionate evidence of overt lytic cell injury. A non-lytic or sublethal form of membrane perturbation therefore remains a plausible possibility, and S100A8 represents one candidate mediator that could contribute to such a process.

This may be particularly relevant when considered from a phosphoinositide-centered perspective. Although the S100A8 study does not directly investigate phosphoinositides, it provides an important proof of principle that the physicochemical composition and anionic character of cellular membranes can determine how inflammatory proteins interact with, and potentially destabilize, those membranes. Phosphoinositides constitute a particularly dynamic and functionally consequential class of anionic membrane lipids, and perturbation of their homeostasis could therefore represent an upstream event capable of altering membrane organization, signaling, trafficking, cytoskeletal coupling, and the cellular response to subsequent inflammatory stimuli. Within such a framework, the initiating lesion would not necessarily be the inflammatory response itself, but rather an early disturbance of membrane lipid homeostasis that subsequently generates DAMP release and innate immune activation. The findings of the present study are compatible with such a model: LNP administration is associated with local muscle-cell necrosis and mitochondrial damage, including release of mtDNA, followed by systemic inflammatory signaling, pulmonary neutrophil recruitment, transcriptional induction of inflammatory pathways, and ultimately NET formation. The authors experimentally connect several of these downstream events, but they do not consider whether they could form a self-amplifying circuit initiated by a more fundamental disturbance of membrane homeostasis.

Under this model, S100A8 could represent an important intermediate rather than merely a downstream marker of neutrophil recruitment. An initial perturbation of membrane lipid organization could promote cellular stress and DAMP release, thereby activating and recruiting neutrophils and inducing S100A8 expression. Increased extracellular S100A8 could then interact with anionic lipid surfaces and promote additional membrane perturbation, potentially generating further DAMP release and inflammatory signaling. Such a positive-feedback mechanism would provide a conceptual link between an initial membrane-centered disturbance and the extensive downstream inflammatory phenotype observed in the study.

Importantly, this model would also provide a potential explanation for why conventional measures of overt cellular injury may not fully capture the biological magnitude of the response: membrane dysfunction, altered lipid organization, signaling abnormalities, and sublethal permeability changes could precede or occur independently of extensive membrane rupture and therefore generate relatively little LDH release. The marked increase in BALF cellularity and protein concentration despite a comparatively limited LDH response is consequently noteworthy and warrants further investigation rather than being interpreted simply as a conventional measure of tissue injury.

Taken together, these observations suggest a potentially broader mechanistic framework in which membrane lipid perturbation functions as an upstream initiating event, followed by DAMP release, innate immune activation, S100A8 induction, neutrophil recruitment and NETosis, and subsequent secondary membrane perturbation. In our framework, the membrane would not merely be a passive target of inflammation but a central regulatory interface through which the initial disturbance could be amplified and propagated. The S100A8 membrane-interaction data provide an intriguing mechanistic precedent for such a feedback process, while the present study provides several of the downstream components that would be required for such a model. This remains a hypothesis rather than a demonstrated causal pathway, and direct experiments linking phosphoinositide perturbation to S100A8 induction and subsequent membrane dysfunction would be required. Nevertheless, the convergence of the transcriptional S100A8 signal, the pronounced neutrophilic response, the NETosis phenotype, and the disproportionate relationship between BALF cellularity/protein and LDH makes this possibility particularly worthy of investigation.

Tamulytė R, Baronaitė I, Šulskis D, Smirnovas V, Jankunec M. Pro-inflammatory S100A8 Protein Exhibits a Detergent-like Effect on Anionic Lipid Bilayers, as Imaged by High-Speed AFM. ACS Appl Mater Interfaces. 2025 Jan 8;17(1):2635-2647. doi: 10.1021/acsami.4c18749. Epub 2024 Dec 26. PMID: 39723944; PMCID: PMC11783366.

Mandal K. Review of PIP2 in Cellular Signaling, Functions and Diseases. Int J Mol Sci. 2020 Nov 6;21(21):8342. doi: 10.3390/ijms21218342. PMID: 33172190; PMCID: PMC7664428.

"2.1 S100A8/A9 expression and release
S100A8/A9 is mainly stored in immune cells such as dendritic cells, neutrophils, monocytes, and macrophages, and is secreted to modulate inflammatory metabolic processes during infection, drug stress, heat, and other irritant conditions (Wang S. et al., 2018). Fibroblasts, keratinocytes, and vascular endothelial cells can also express S100A8/A9 upon activation (Schiopu and Cotoi, 2013). S100A8/A9 is predominantly localized in the cytoplasm and can translocate to the cytoskeleton and plasma membrane to increase intracellular calcium levels (Roth et al., 1993). S100A8/A9 constitutes approximately 40% cytosolic protein content in the main reserve source of neutrophils, and some S100A8 exists in granule membranes and euchromatin regions of the nucleus. S100A8/A9 isolated from neutrophils can further dose-dependently induce neutrophil activation and adhesion (Edgeworth et al., 1991; Sprenkeler et al., 2022)."

Zhou H, Zhao C, Shao R, Xu Y, Zhao W. The functions and regulatory pathways of S100A8/A9 and its receptors in cancers. Front Pharmacol. 2023 Aug 28;14:1187741. doi: 10.3389/fphar.2023.1187741. PMID: 37701037; PMCID: PMC10493297.
Impfschäden: Von Behörden und Gerichten ignoriert

Impfgeschädigte werden vor deutschen Gerichten kein Recht bekommen, so der Rechtsanwalt Wilfried Schmitz. Ein Gespräch über das größte medizinische Verbrechen und die Hintergründe der Klageabweisungen.

https://transition-news.org/impfschaden-von-behorden-und-gerichten-ignoriert
Forwarded from Chuck Chunder
Media is too big
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Google NotebookLM explainer of Maria's recent Substack article.


August 19, 2026
Exosomes, Schmectasomes: The Hidden Second Life of mRNA-LNPs
What the Onpattro Pharmacokinetic Data Reveals About the mRNA-LNP Platform

https://mariagutschi.substack.com/p/the-exosome-problem-why-the-mrna
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„Groteske Modellierungen“: Mediziner kritisieren mangelhafte Corona-Datenlage

Medizinische Fachgesellschaften in Brandenburger Corona-Enquete-Kommission bemängeln „wenig nachvollziehbare“ politische Entscheidungen in Corona-Krise / Auch Kritik an Experten-Auswahl für Politikberatung / Debatte zum Umgang mit wissenschaftlichen Kontroversen: Mitglieder der Enquete-Kommission „irritiert“ und „betroffen“ über Absage der Gesellschaft für Virologie

https://multipolar-magazin.de/meldungen/0458
https://substack.com/profile/50562652-genervter-burger/note/c-334577244

He asked once more for it:

https://substack.com/profile/50562652-genervter-burger/note/c-334716006

Meine Schlussfolgerung:

Your proposed dose–response explanation is therefore confronted with a fundamental empirical inconsistency: the Korean cohort reports the higher cancer association for the adenoviral/cDNA platform, yet direct pharmacokinetic studies do not show higher systemic spike exposure with Ad26.COV2.S; indeed, they show substantially higher serum spike concentrations after mRNA vaccination, while vaccine-specific spike has been detected months after mRNA vaccination.
https://www.sciencedirect.com/journal/acta-pharmaceutica-sinica-b/vol/16/issue/9

Es ist offiziell. Wir sind gedruckt.

https://journalissues.elsevier.com/catalog/journal/acta-pharmaceutica-sinica-b

Elsevier scheint jedoch bei den issues gut 2 Ausgaben hinterherzuhinken. Es müsste volume 16 issue 9 sein.
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Holy moly! Scheint, als ob wir langsam Wellen schlagen.
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