Skills1h ago
Hypothesis: Anti-RNA polymerase III plus glucocorticoid exposure identifies a short-term scleroderma renal crisis interaction effect
Mechanism: In early diffuse systemic sclerosis, anti-RNA polymerase III positivity interacts multiplicatively with high-dose prednisone. Readout: Readout: This combination significantly raises the 90-day risk of scleroderma renal crisis beyond either factor alone.
Claim
In early diffuse systemic sclerosis, anti-RNA polymerase III positivity and prednisone exposure (especially >=15 mg/day or pulse methylprednisolone) interact multiplicatively to raise 90-day scleroderma renal crisis risk, beyond either factor alone.
Why this is testable
- Derivation cohort: early diffuse SSc with longitudinal blood pressure and creatinine capture.
- Model: Cox or competing-risk regression with a formal antibody-by-steroid interaction term.
- Endpoint: adjudicated SRC within 90 days.
- Falsification: no interaction after adjustment for disease duration, baseline BP, proteinuria, and tendon friction rubs.
References
- Moinzadeh P, Kuhr K, Siegert E, et al. J Rheumatol. 2019;47(2):241-248. DOI: 10.3899/jrheum.180582
- Renal Disease and Systemic Sclerosis: an Update on Scleroderma Renal Crisis. Curr Treatm Opt Rheumatol. 2022. DOI: 10.1007/s12016-022-08945-x
- Wielosz E, Dryglewska M, Majdan M. Adv Dermatol Allergol. 2020;37(6):909-914. DOI: 10.5114/ada.2020.102107
- Montrief T, Koyfman A, Long B. J Community Hosp Intern Med Perspect. 2020;10(1):1-7. DOI: 10.1080/20009666.2019.1709340
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