Notable Findings

A running log of observations that are striking, unexpected, or carry implications beyond the paper they came from. Each entry is a flag — something worth returning to, following up on, or building an analysis around. Entries are added during ingest whenever something catches the eye.

[2026-04-14] Cross-reactive E protein IgG rises — not wanes — in the ADE risk window (Bos2025, PREPRINT)

Source: Bos2025 - Longitudinal Antibody Dynamics After Dengue

Finding: In a Nicaraguan pediatric cohort (n=79) followed to 18 months post-dengue, cross-reactive E protein IgG (XR E-IgG) targeting domains I and II (EDI/II) increases from 6 to 18 months post-primary infection, with a calculated t½ of −2.13 years (growth trajectory). NS1-IgG, by contrast, wanes conventionally (t½ ≈ 2.1 years). EDIII-targeting antibodies — the more serotype-specific, more neutralising fraction — remain flat. IgA seropositivity persists at ~100% and IgM at ~50% at 18 months, far exceeding standard expectations.

Why notable: The foundational assumption of the classical ADE model is that cross-reactive antibodies wane passively after primary dengue, eventually dropping below the neutralisation threshold and converting from protective to enhancing — with the inter-infection interval determining ADE risk. Bos2025 challenges this with an opposite trajectory: the cross-reactive EDI/II-targeting IgG pool is actively expanding during the 6–18M window. Critically, EDI/II-targeting antibodies are the cross-reactive, non-neutralising class most likely to mediate ADE upon heterotypic re-exposure. If this finding is confirmed in peer-reviewed form, the ADE risk window is not opened by passive decay — it is created by an active immunological process of cross-reactive antibody accumulation. This also reframes the inter-infection interval effect: a longer interval may produce higher ADE risk not because neutralising antibodies wane further, but because the non-neutralising XR EDI/II pool has had more time to expand. The kinetic divergence between NS1-IgG (waning) and XR E-IgG (rising) is itself a novel finding — it implies antibody trajectories are antigen-specific, not a uniform property of the post-dengue immune response. The NS1-IgG waning also provides the first kinetic anchor in this wiki for the ANA trajectory: the NS1-mimicry component of dengue ANA likely declines with NS1-IgG (t½ ≈ 2.1 years), while the epitope-spreading component may be more durable.

Caveat: Bos2025 is a medRxiv preprint. These findings require peer review before the mechanistic interpretations can be treated as established.

Follow-up questions:

Are the rising XR EDI/II IgG antibodies functionally non-neutralising — i.e., do they enhance infection in ADE assays rather than neutralise it?
Does the inter-infection interval correlate with peak XR EDI/II IgG titre at the time of secondary infection — and does that titre predict DHF severity?
Does NS1-IgG waning (t½ ≈ 2.1 years) correlate with declining anti-platelet / anti-endothelial autoantibody titres, directly linking NS1-IgG dynamics to resolution of NS1-mimicry-derived autoimmunity?

[2026-04-13] The FcγRIIa H131/R131 effect in dengue is IgG2-specific — the conventional IgG1/IgG3 model is unsupported by affinity data

Source: Bruhns2009 - FcγR Specificity and Affinity for IgG Subclasses

Finding: By SPR measurement, FcγRIIA-H131 and -R131 bind IgG1 with nearly equal affinity (KA 52 vs. 35 ×10⁵ M⁻¹; ~1.5× difference) and IgG3 identically (9.1 vs. 8.9 ×10⁵ M⁻¹). The primary allele-dependent difference is for IgG2: H131 binds IgG2 4.5× more efficiently than R131 (4.5 vs. 1.0 ×10⁵ M⁻¹). Separately, FcγRIIB (inhibitory receptor) has ~43× lower affinity for IgG1 than FcγRIIA-H131 — making it incapable of independently intercepting ICs, and dependent entirely on co-engagement with activating receptors.

Why notable: The standard explanation for why FcγRIIa-HH is associated with worse dengue outcomes (Garcia2009/2010) and for why RR is protective against symptomatic infection has always been that HH has lower IgG1/IgG3 affinity → poorer IC clearance → IC accumulation → ADE/inflammation. Bruhns2009 directly contradicts the affinity premise: H131 binds IgG1 more efficiently than R131, and IgG3 identically. The existing wiki pages have now been corrected, but the deeper implication remains unresolved: if the affinity model is wrong, the mechanism by which HH is harmful in dengue is unknown. The IgG2 asymmetry (4.5×) now becomes the most mechanistically plausible explanation — but only if IgG2 anti-dengue antibodies are abundant enough in secondary infection to drive differential FcγRIIA engagement. Additionally, the FcγRIIB weakness quantifies something previously only assumed: the inhibitory checkpoint is structurally too weak to independently terminate IC-driven activation, providing a molecular basis for why dengue IC accumulation (Garcia2009) sustains inflammation without effective negative feedback.

Follow-up questions:

What is the IgG subclass distribution of anti-dengue antibodies in primary vs. secondary infection, and particularly at the time post-infection when Garcia2009’s IC/ANA measurements were made?
If IgG2 anti-dengue antibodies are substantial in secondary infection, do H131/H131 individuals have measurably higher IC-driven cytokine release than R131/R131 individuals in ex vivo assays?
Can FcγRIIB’s ~43× affinity deficit relative to FcγRIIA be experimentally demonstrated in dengue IC models — confirming that inhibitory signalling only engages when activating receptors are co-occupied?

[2026-04-13] ADEM is the one post-dengue autoimmune signal robust enough to survive methodological opposite study designs

Sources: Li2018 - Increased Risk of Autoimmune Diseases in Dengue, Shih2023 - Autoimmune Disease Risk After Dengue

Finding: Li2018 (ICD-coded dengue, n=12,506, no multiple comparison correction) and Shih2023 (lab-confirmed dengue, n=63,814, Bonferroni correction) are methodologically as different as two studies using the same database can be — yet both find ADEM significantly elevated after dengue, with convergent relative risk estimates (aHR 3.80 and aHR 2.72 respectively). Of all specific autoimmune diseases tested across either paper, ADEM is the only finding that holds across both. Conversely, GBS is non-significant in both (aHR 0.97 and non-significant after correction), despite being the most commonly cited post-infectious dengue neurological complication in case reports.

Why notable: The conventional approach to assessing a methodologically weaker study is to discount its positive findings when a stronger study fails to replicate them. But the ADEM convergence inverts this: both studies agree, from opposite methodological starting points. This cross-design robustness is a stronger form of replication than two studies using the same method. It establishes ADEM as the most methodologically secure disease-specific finding in the dengue–autoimmunity literature. The GBS null convergence is similarly informative: if GBS were elevated, it would appear in at least one of two studies — its absence in both suggests the GBS case reports represent genuine but rare individual events below population-level detectability rather than a generalizable dengue sequela. Separately, Li2018 flags primary adrenocortical insufficiency as the most frequent outcome by case count (n=19; aHR 2.05), proposing a TLR-mediated adrenal mechanism that Shih2023 did not specifically test and that remains unvalidated.

Follow-up questions:

Can the Li2018 adrenocortical insufficiency finding be retested in a lab-confirmed cohort with sufficient power? Shih2023 likely had too few cases to detect a 2.05× risk for a rare outcome.
Is dengue ADEM biologically distinct from ADEM triggered by other viral infections (measles, EBV, influenza) — or is it an instance of generic post-viral demyelination?
Do the case reports of dengue-associated GBS represent a real rare phenotype, or diagnostic misclassification (severe dengue with neuropathy vs. GBS)?

[2026-04-13] NS1 molecular mimicry cannot explain the nuclear ANA — epitope spreading is the implied mechanism

Sources: Lin2006 - Autoimmune Pathogenesis in Dengue Virus Infection, Lin2011 - Molecular Mimicry Virus Host Dengue Pathogenesis, Wan2012 - Autoimmunity in Dengue Pathogenesis, Chatterjee2024 - ANA Detection in Dengue Kolkata, Johnson2022 - Infectious Diseases Autoantibodies and Autoimmunity

Finding: The NS1 molecular mimicry mechanism — the best-evidenced dengue-specific autoimmune pathway — produces cross-reactive antibodies against PDI, vimentin, HSP60, and ATP synthase β on platelet and endothelial surfaces. None of these targets are nuclear antigens. Yet Chatterjee2024 shows 54.8% of dengue patients are ANA-positive by HEp-2 IIFA, which detects antibodies against nuclear components. Of the three candidate mechanisms for infection-triggered ANA (molecular mimicry, bystander activation, epitope spreading), bystander activation has been functionally ruled out by the COVID-19 ICU null finding (Johnson2022). By elimination, epitope spreading from dengue-induced tissue damage releasing cryptic nuclear antigens is the most plausible explanation for the HEp-2-positive fraction of dengue ANA — a conclusion not stated in any individual source, only visible from synthesis.

Why notable: The dengue autoimmunity literature has focused almost entirely on NS1/platelet/endothelial cross-reactivity as the mechanism — understandably, because that is where the experimental evidence is. But this mechanism cannot, by definition, produce antinuclear antibodies on HEp-2 IIFA. The 54.8% IIFA rate therefore implicates a second, independent mechanism (epitope spreading) operating in parallel with NS1 mimicry. If correct, this means dengue-associated ANA represents the output of at least two distinct processes with different kinetics: (1) early molecular mimicry producing non-nuclear autoantibodies that peak acutely and resolve over months; and (2) epitope spreading from tissue damage releasing nuclear antigens, potentially with a delayed onset and longer persistence curve — which would fit Garcia2009’s 2-year ANA persistence better than NS1 mimicry alone can. It also reframes the research question: the key unanswered question is not “what does NS1 cross-react with?” (largely answered) but “what nuclear antigens are released by dengue-induced endothelial apoptosis and platelet lysis?”

Follow-up questions:

What nuclear antigens are released from endothelial cells undergoing the anti-NS1-induced apoptosis pathway (caspase-3 activation)? This is directly testable: add anti-NS1 Abs to endothelial cell cultures, collect the apoptotic supernatant, run it against HEp-2 cells.
Does dengue ANA on HEp-2 show a specific staining pattern (homogeneous, speckled, nucleolar) suggesting particular nuclear antigen targets — and does this pattern correlate with the LIA-positive subgroup?
Is the HEp-2-positive ANA fraction higher in patients with more endothelial damage (DHF vs. DF), as predicted by the epitope spreading model?

[2026-04-12] Dengue drives a massive acute ANA spike (55% by HEp-2 IIFA) — but two-thirds are non-specific

Source: Chatterjee2024 - ANA Detection in Dengue Kolkata

Finding: In 135 laboratory-confirmed dengue patients presenting to fever clinics in Kolkata, India, 54.8% tested ANA-positive by HEp-2 IIFA — the gold-standard, most sensitive ANA platform. When these IIFA-positive patients were retested with Line Immunoassay (LIA) covering 18 specific autoantibody targets, only 18.5% of all dengue patients remained positive — meaning roughly two-thirds of IIFA-positive dengue patients had no detectable disease-specific autoantibody. Among dengue-negative febrile controls, the IIFA:LIA ratio was much tighter (10.3% vs. 7.1%), indicating the non-specific IIFA positivity is dengue-specific.

Why notable: This is the first measurement in this wiki of ANA in acute dengue using HEp-2 cells, and the 54.8% rate is far higher than any prior estimate. But the 3:1 IIFA:LIA ratio reframes the whole dengue-ANA story. It means: (1) dengue acutely perturbs nuclear antigen reactivity on a massive scale — half of patients show fluorescent staining; (2) almost none of this corresponds to the targeted specificities (Sm, dsDNA, Ro/La, Scl-70, U1-RNP, Jo-1, etc.) of named autoimmune diseases. This is the immunological equivalent of broad collateral fire: dengue activates many self-reactive B cell clones, but almost none are the clones driving established AARDs. It provides the most direct evidence yet that the acute-phase autoimmune activation in dengue is largely non-specific — consistent with Shih2023’s population-level null finding for clinical autoimmune disease incidence. It also raises a calibration problem for Garcia2009’s 23.1% (rat liver IIF, 2 years post-dengue): if the acute HEp-2 rate is ~55%, what is the trajectory — does it fall to ~23% rat-liver-equivalent, or does something persist? The substrate gap makes this unanswerable from current data.

Follow-up questions:

What is the HEp-2 IIFA rate at 6 months and 2 years post-dengue? Charting the decline of the acute spike would determine whether the Garcia2009 2-year finding represents persistence or near-complete resolution.
Are the IIFA-positive, LIA-negative dengue ANAs predominantly low-titer (1:40–1:80) or do some reach clinically relevant titers (≥1:160)? Titer data would clarify whether this is a polyclonal noise phenomenon or something more targeted.
Do the 18.5% LIA-positive patients go on to develop clinical autoimmune disease at higher rates? The 6–7 month follow-up in Chatterjee2024 is insufficient to answer this.

[2026-04-12] The prior “dengue causes broad autoimmune disease” claim is largely an artifact of misclassification

Source: Shih2023 - Autoimmune Disease Risk After Dengue

Finding: A 2018 population-based study (Li et al.) reported dengue patients had 1.88× the risk of more than 20 autoimmune diseases. Shih2023, using a 5× larger cohort of laboratory-confirmed dengue cases (63,814 vs. 12,506), finds no such broad signal after correcting for multiple comparisons. Only autoimmune encephalomyelitis (ADEM) is significantly elevated — and only in the first month. Li et al.’s “dengue” cases were not lab-confirmed; when Shih2023 cross-checked the same era’s NHIRD against Taiwan CDC records, only 51.4% of hospitalised “dengue” patients were actually lab-confirmed. The rest likely included febrile illnesses that were initially mistaken for dengue, some of which may have been early presentations of autoimmune diseases (which can mimic dengue acutely: fever, rash, thrombocytopenia).

Why notable: This is a direct, large-scale refutation of a published finding using the same national database, with a methodologically stronger study design. It has two compounding implications for this wiki. First, it closes the gap between Garcia2009’s finding of elevated autoimmune markers at 2 years post-dengue and the absence of clinically manifest autoimmune disease: the markers appear to be largely sub-clinical and transient, not progressing to disease. Second, it extends beyond dengue: it documents that a 51.4% diagnostic accuracy rate in a hospitalized cohort can produce a spuriously elevated autoimmune risk estimate of aHR 1.88. Any cohort study using clinically diagnosed dengue (without lab confirmation) in an outbreak setting should be viewed with similar suspicion — this is a general methodological lesson for post-infectious autoimmunity research.

Follow-up questions:

Does the same misclassification problem affect other published associations between dengue and specific outcomes (e.g., cancer, cardiovascular disease, psychiatric conditions) that relied on clinical dengue diagnoses?
Does the Garcia2009 ANA/IC/CRP elevation at 2 years represent genuine but subclinical autoimmune activation — and if so, what determines whether it stays subclinical vs. progresses to disease?
Can the modest but statistically significant overall autoimmune risk (aHR 1.16) in Shih2023 be attributed to ADEM carrying the overall estimate, or is there a genuine diffuse sub-threshold risk?

[2026-04-12] WGNGCG motif tracks haemorrhagic phenotype across flaviviruses

Source: Lin2011 - Molecular Mimicry Virus Host Dengue Pathogenesis

Finding: The dengue E protein contains a six-amino-acid motif WGNGCG (aa 101–106) with sequence homology to coagulation factors XI, X, IX, VII, II (thrombin), plasminogen, and tPA. Anti-E Abs raised against this motif inhibit plasmin activity. The motif is conserved in all flaviviruses associated with haemorrhagic disease — JEV, WNV, YFV, TBE, OHFV — but is absent in HCV, which does not typically cause haemorrhage.

Why notable: This is not just a dengue finding — it is a proposed molecular explanation for why haemorrhage is a flavivirus-class phenotype rather than a dengue-specific one. The presence/absence of a single six-residue motif tracks with haemorrhagic vs. non-haemorrhagic outcome across an entire viral genus. If validated, it would suggest the coagulation-interference mechanism is ancestral to the haemorrhagic flaviviruses rather than independently evolved in dengue. It also raises the question of whether vaccines or therapeutics targeting this motif could be broadly active across haemorrhagic flaviviruses.

Follow-up questions:

Has the WGNGCG homology been experimentally validated with JEV/WNV/YFV anti-E antibodies — do they also inhibit plasmin?
Are there any flaviviruses that carry the motif but do not cause haemorrhage (which would falsify the hypothesis)?
Does primary vs. secondary dengue infection produce different titres of anti-E Abs targeting this motif?

[2026-04-12] FcγRIIa genotype controls the symptomatic/asymptomatic threshold, not DF vs. DHF severity

Source: Garcia2010 - Asymptomatic Dengue FcγRIIa Polymorphism

Finding: The FcγRIIa-HH genotype is dramatically enriched in DHF (51.5%) vs. asymptomatic infection (9.1%), giving an OR of 10.56 (95% CI 2.33–54.64) for DHF vs. asymptomatic. However, when only the two symptomatic groups are compared (DF vs. DHF), the allele frequency difference is not significant (χ² = 0.59, p = 0.44). The FcγRIIa effect is almost entirely about whether you develop symptoms at all, not about how severe those symptoms become.

Why notable: The conventional framing is that FcγRIIa drives severity — the ADE model predicts worse viral uptake in HH individuals leading to worse disease. But this data says the genotype acts as a binary gate (symptomatic or not), not a severity dial. If HH predisposes to symptomatic infection via impaired immune complex clearance, then something else controls progression from DF to DHF — viral load, serotype, prior immunity, or another host factor not captured here. The finding decouples acute pathology (DHF) from post-acute sequelae differently than expected: Garcia2009 from the same cohort also shows DF vs. DHF does not predict post-dengue sequelae (p = 0.086), reinforcing the idea that severity gradations above the symptom threshold may be governed by mechanisms separate from FcγRIIa.

Follow-up questions:

What does control the DF→DHF transition if FcγRIIa genotype does not?
Does the same symptomatic/asymptomatic gating effect of FcγRIIa hold in other dengue epidemics and serotypes?
Is there a second genetic locus that specifically modifies DF→DHF severity, independent of FcγRIIa?

[2026-04-12] Potentially ADE-capable plasmablast clonotype is fully absent at convalescence

Source: Sungnak2025 - Distinct Immune Responses Asymptomatic Symptomatic Dengue

Finding: A public BCR clonotype network — 79 plasmablasts from 8 symptomatic donors, 83.5% using IGHV4-3901/IGKV1-901 — is enriched exclusively in symptomatic (not asymptomatic) dengue. In the longitudinal paired samples (febrile phase → 2-month convalescence), no matched BCR clones from the febrile phase plasmablasts were found at convalescence. The clonotype is completely absent at recovery.

Why notable: The ADE model predicts that cross-reactive IgG1 antibodies from a prior infection mediate enhanced viral uptake during a subsequent infection. If the public clonotype identified here produces such antibodies, and if those clones leave no persistent memory, then ADE from this specific clonal lineage cannot be the mechanism of secondary-infection severity — the cells producing these antibodies don’t survive to the next encounter. This does not rule out ADE (other clones producing cross-reactive IgG1 may persist), but it challenges the assumption that the most abundant and clonally expanded plasmablast population during symptomatic dengue is the source of ADE-mediating memory antibodies. It may instead represent a dead-end acute response.

Follow-up questions:

Does the total IGHG1+ plasmablast pool (not just this clonotype) leave any long-lived memory cells after acute dengue?
What antigen does the IGHV4-3901/IGKV1-901 clonotype target — if it is self-antigen, the transience makes immunological sense (tolerance re-establishment); if it is dengue antigen, the absence from memory is puzzling?
Are the plasmablasts present at 2-month convalescence a distinct lineage from the acute clonotype, or simply a lower-level contraction of the same population?

[2026-04-12] Anti-prothrombin in 69.6% of acute viral infections — coagulation interference is not dengue-specific

Sources: Berlin2007 - Autoantibodies in Nonautoimmune Individuals during Infections, Lin2011 - Molecular Mimicry Virus Host Dengue Pathogenesis

Finding: Berlin2007 found anti-prothrombin antibodies in 69.6% of patients with acute viral infections (HAV, HBV, HCV). Lin2011 independently identified that the dengue E protein contains a WGNGCG motif (aa 101–106) with direct sequence homology to prothrombin (factor II) and other coagulation factors, and showed that anti-E antibodies inhibit plasmin activity. These two findings arrive at the same target — coagulation factor cross-reactivity — from entirely different methodologies and study populations, with no dengue patients in Berlin2007.

Why notable: This convergence suggests coagulation factor cross-reactivity during acute viral infection may be a general feature of hepatotropic and haemorrhagic virus immunopathology, not a dengue-specific quirk. Lin2011 attributes it to molecular mimicry of the WGNGCG motif; Berlin2007 likely reflects bystander activation or independent mimicry (prothrombin is a common autoantibody target in antiphospholipid syndrome triggered by many infections). Together they predict that dengue patients will have measurable anti-prothrombin antibodies during acute infection — a testable hypothesis not yet directly examined in this wiki’s dengue-specific sources. If confirmed, it would add an independent second mechanism (anti-prothrombin from generic viral infection) to the dengue-specific WGNGCG coagulation interference already described.

Follow-up questions:

Have anti-prothrombin levels been measured directly in DHF/DSS patients — and do they correlate with haemorrhage severity independently of anti-NS1?
Are anti-prothrombin antibodies in viral infection the result of molecular mimicry (shared epitopes) or bystander activation (non-specific)?
Does the Berlin2007 anti-prothrombin finding apply to dengue specifically, or is dengue unusual in having an additional E-protein molecular mimicry layer on top?

[2026-04-12] APTT is the strongest laboratory correlate of vascular permeability — connecting coagulopathy and plasma leakage

Source: Guzman2016 - Dengue Infection

Finding: Among all laboratory parameters measured in dengue patients, prolongation of APTT (activated partial thromboplastin time) shows the strongest statistical correlation with the degree of vascular permeability (plasma leakage). This is an epidemiological/clinical association, not a mechanistic proof — but APTT prolongation reflects coagulation pathway disruption, while plasma leakage is an endothelial barrier phenomenon. That the best predictor of one should be a marker of the other suggests they share a common upstream effector.

Why notable: The three leading mechanisms for vascular permeability in dengue are (1) NS1-TLR4 cytokine storm, (2) anti-NS1 autoantibody endothelial damage, and (3) direct sNS1 endothelial barrier disruption. None of these inherently predicts that APTT should be the strongest correlate. However, Guzman2016 also documents that sNS1 binds thrombin in vivo and inhibits prothrombin activation — directly prolonging APTT. If sNS1 is both the driver of APTT prolongation AND the driver of endothelial permeability, the APTT-permeability correlation becomes mechanistically coherent: they are two parallel outputs of the same sNS1 effector. This reframes APTT from a coagulopathy marker to a surrogate biomarker of pathogenic sNS1 activity — potentially more informative than platelet count, which Guzman2016 specifically notes is NOT a reliable predictor of bleeding severity.

Follow-up questions:

Has APTT been tested as an early prognostic biomarker for DHF risk in prospective dengue cohorts — and does it outperform NS1 titre or platelet count in predicting plasma leakage?
Is the APTT-permeability correlation equally strong in primary and secondary infection, or only in the secondary setting where sNS1 levels are higher?
Does NS1-thrombin complex concentration in patient plasma correlate with both APTT prolongation and with clinical plasma leakage severity?

[2026-04-12] Severe viral illness (ICU-level COVID-19) does not elevate ANA — ruling out bystander activation for Garcia2009

Source: Johnson2022 - Infectious Diseases Autoantibodies and Autoimmunity

Finding: Trahtemberg et al. (cited in Johnson2022) found no significant difference in ANA prevalence between COVID-19-positive ICU patients and COVID-19-negative ICU patients. Severe viral infection with a massive cytokine storm — the classic setting for bystander polyclonal B cell activation — does not reliably elevate ANA above a matched severity baseline.

Why notable: The 23.1% ANA positivity in Garcia2009’s post-dengue cohort needs a mechanistic explanation. Three candidates exist: molecular mimicry, bystander activation, or epitope spreading. This finding eliminates bystander activation as a sufficient explanation — if it were enough, severe COVID-19 ICU patients would show elevated ANA relative to other ICU patients, and they don’t. This sharply narrows the mechanism: dengue-associated ANA must involve either dengue-specific molecular mimicry (NS1 → self-antigen cross-reactivity, well-documented for platelet/endothelial surface proteins in Lin2006/Lin2011, though ANA targets nuclear antigens) or epitope spreading from dengue-induced tissue damage releasing cryptic nuclear antigens. The negative COVID result makes the Garcia2009 ANA finding specifically interesting rather than a generic feature of severe illness.

Follow-up questions:

Is dengue’s ANA-inducing potential greater than COVID-19’s because dengue has higher cross-reactive mimicry (NS1 homology with nuclear targets) — or because dengue-specific FcγRIIa-mediated IC persistence creates a unique chronic antigen stimulation loop?
Does dengue NS1 share structural homology with nuclear antigens (Sm, SSA, dsDNA) in addition to the platelet/endothelial surface targets already established by Lin2006/Lin2011?
Would ANA levels in dengue patients correlate with FcγRIIa genotype (HH > RR), as predicted by the impaired IC clearance model?

[2026-04-12] Intrinsic ADE may mechanistically link viral enhancement to autoantibody production

Source: Wan2012 - Autoimmunity in Dengue Pathogenesis

Finding: The “intrinsic ADE” hypothesis proposes that FcγR-mediated DENV entry does not merely increase viral load — it actively suppresses type I IFN antiviral responses while promoting IL-10 production and Th2 skewing. This creates a dual state: high viral replication AND enhanced antibody (including autoantibody) production.

Why notable: This connects two mechanisms previously treated as parallel — ADE and autoimmunity — into a potential causal chain. If intrinsic ADE drives Th2/antibody-dominant responses while suppressing Th1/IFN-mediated viral clearance, then ADE doesn’t just increase viral load; it actively tilts the immune response toward the antibody-producing phenotype that generates cross-reactive autoantibodies via NS1 molecular mimicry. This would explain why severe dengue (DHF/DSS, where ADE is most active) shows the highest anti-platelet and anti-endothelial autoantibody levels (Lin2006). It also raises the question of whether the IL-10-driven IGHG1+ plasmablast expansion documented in DHF by Sungnak2025 is partly a consequence of intrinsic ADE.

Dengue Literature Review

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Notable Findings

Notable Findings

[2026-04-14] Cross-reactive E protein IgG rises — not wanes — in the ADE risk window (Bos2025, PREPRINT)

[2026-04-13] The FcγRIIa H131/R131 effect in dengue is IgG2-specific — the conventional IgG1/IgG3 model is unsupported by affinity data

[2026-04-13] ADEM is the one post-dengue autoimmune signal robust enough to survive methodological opposite study designs

[2026-04-13] NS1 molecular mimicry cannot explain the nuclear ANA — epitope spreading is the implied mechanism

[2026-04-12] Dengue drives a massive acute ANA spike (55% by HEp-2 IIFA) — but two-thirds are non-specific

[2026-04-12] The prior “dengue causes broad autoimmune disease” claim is largely an artifact of misclassification

[2026-04-12] WGNGCG motif tracks haemorrhagic phenotype across flaviviruses

[2026-04-12] FcγRIIa genotype controls the symptomatic/asymptomatic threshold, not DF vs. DHF severity

[2026-04-12] Potentially ADE-capable plasmablast clonotype is fully absent at convalescence

[2026-04-12] Anti-prothrombin in 69.6% of acute viral infections — coagulation interference is not dengue-specific

[2026-04-12] APTT is the strongest laboratory correlate of vascular permeability — connecting coagulopathy and plasma leakage

[2026-04-12] Severe viral illness (ICU-level COVID-19) does not elevate ANA — ruling out bystander activation for Garcia2009

[2026-04-12] Intrinsic ADE may mechanistically link viral enhancement to autoantibody production

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