Scientists discover a cause of lupus, possible way to reverse it

Original Article ↗ Hacker News Discussion ↗

Links to ME/CFS and Long COVID

  • Several commenters wonder if the lupus findings (T‑cell imbalance, AHR pathway, interferon) could illuminate ME/CFS or long COVID.
  • Some say ME/CFS funding has been eclipsed by long COVID; others note major programs (e.g., RECOVER, UCSF initiatives) now include ME/CFS‑like cohorts.
  • Hypotheses raised: persistent viral antigens and immune cell exhaustion as shared roots, but this remains unclear.

Role of AHR in Autoimmunity and Cancer

  • AHR is highlighted as central to the lupus paper and already implicated in psoriasis, MS, rosacea, and possibly IBD.
  • Tapinarof (an AHR agonist) is cited as an unusually effective psoriasis topical with sustained remission; coal tar and some natural compounds may also act via AHR.
  • Multiple comments stress AHR signaling is highly context‑dependent: activation can suppress inflammation but also promote tumor growth and dampen anti‑tumor immunity.

Enthusiasm vs Skepticism About the Lupus Paper

  • Enthusiastic reactions focus on:
    • Identifying a more specific immunologic imbalance (CXCL13+ T‑cell subset, AHR vs type‑I interferon) and a plausible way to “reprogram” pathogenic cells.
  • Skeptical voices:
    • Point out it’s basic science in small cohorts, not a therapy.
    • Note similar “promising” biomarkers (e.g., CXCL13 in RA) have not yet translated clinically.
    • Argue lupus is heterogeneous; this mechanism may fit only a subset of patients.

Autoimmune Disease Mechanisms and Therapies

  • Discussion emphasizes that autoimmunity is complex but not a total “black box”: modern drugs target specific cell types (e.g., CD20+ B cells in MS) or pathways (kinases, interferon, IL‑23, TRM cells).
  • Checkpoint inhibitors in oncology are framed as intentionally loosening immune brakes, often causing autoimmune‑like side effects, illustrating the “cancer vs autoimmunity” trade‑off.

Diet, Microbiome, and Lifestyle Anecdotes

  • Many personal stories:
    • Plant‑heavy or vegan diets sending lupus‑like or psoriasis symptoms into remission.
    • Meat‑heavy/carnivore diets putting arthritis or other autoimmune symptoms into remission.
    • Others report the exact opposite (meat worsens inflammation, plants help).
    • Some attribute improvements to specific eliminations (gluten, nightshades, glyphosate‑exposed grains) or probiotics; others find these ineffective.
  • One strong claim: “all autoimmunity is gut dysfunction,” countered by others who see microbiome as one factor among many.
  • Overall, experiences are highly conflicting and not backed by systematic evidence in the thread; several people explicitly warn against overgeneralizing anecdotal diets.

Allergies, Inflammation, and Mental Health

  • Allergies are discussed as overactive immunity; allergen immunotherapy (gradual exposure) is mentioned.
  • Inflammation is linked to depression via cytokines; an interferon‑treated cancer cohort developing depression is cited.
  • Debate over whether vitamin C or other supplements meaningfully reduce inflammation or depression; commenters disagree and call the evidence modest at best.

Environmental, Genetic, and Other Factors

  • Smoking is noted as a risk factor that roughly doubles lupus/psoriasis risk despite AHR pathways.
  • A “hygiene/clean environment” hypothesis is floated for higher autoimmune/allergy rates in affluent countries.
  • HLA‑B27 and other genes are mentioned as shared risk factors across multiple autoimmune disorders.
  • Some speculate that strong autoimmune traits historically improved survival in pandemics, implying trade‑offs.

Cultural / Media Reactions

  • Numerous references to the TV show House (“It’s never lupus”) and jokes about how this discovery would “break” its plots.
  • Several commenters with lupus or family members affected express cautious hope but remain aware this is early‑stage research.