ArticleBiomolecules2025
The Inhibitory Effects of Alpha 1 Antitrypsin on Endosomal TLR Signaling Pathways.
Article in Biomolecules, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
4 citing papers in PubMed.
- Human α1-Antitrypsin Inhibits Nociceptor Excitability and Relieves Inflammatory and Neuropathic Pain.Biomolecules · 2026Article
- Alpha 1 Antitrypsin Suppresses Autoantibody Production and Cellular Autoimmunity in Chronic Graft-Versus-Host Disease (cGVHD) in a Lupus Mouse Model.Biomolecules · 2026Article
- Sub-Toxic Exposure to DEPs and PMJournal of xenobiotics · 2025Article
- Administration of Purified Alpha-1 Antitrypsin in Salt-Loaded Hypertensive 129Sv Mice Attenuates the Expression of Inflammatory Associated Proteins in the Kidney.Biomolecules · 2025Article
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Endosomal toll-like receptors (TLRs) TLR7, TLR8, and TLR9 play an important role in systemic lupus erythematosus (SLE) pathogenesis. The proteolytic processing of these receptors in the endolysosome is required for signaling in response to DNA and single-stranded RNA, respectively. Targeting this proteolytic processing may represent a novel strategy to inhibit TLR-mediated pathogenesis. Human alpha 1 antitrypsin (hAAT) is a protease inhibitor with anti-inflammatory and immunoregulatory properties. However, the effect of hAAT on endosomal TLRs remains elusive. In this study, we first tested the effect of hAAT on TLR9 signaling in dendritic cells (DCs). We showed that hAAT inhibited TLR9-mediated DC activation and cytokine production. Human AAT also lowered the expressions of interferon signature genes. Western blot analysis showed that hAAT reduced the expression of the active form (cleaved) of TLR9 in DCs, indicating a novel mechanism of hAAT function in the immune system. We next tested the effect of hAAT on TLR7/8 signaling. Similar to the effect on TLR9 signaling, hAAT also inhibited R848 (TLR7 and 8 agonist)-induced DC activation and functions and lowered the expressions of interferon signature genes. Our in vivo studies using hAAT transgenic mice also showed that hAAT attenuated R848-induced pathogenesis. Specifically, hAAT completely blocked the R848 induction of germinal center T cells (GC T), B cells (GC B), and plasma cells (GC PCs), as well as T follicular T helper cells (T
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.