PMID- 33737451 OWN - NLM STAT- MEDLINE DCOM- 20210917 LR - 20231215 IS - 2053-8790 (Print) IS - 2053-8790 (Electronic) IS - 2053-8790 (Linking) VI - 8 IP - 1 DP - 2021 Mar TI - Hydroxychloroquine is associated with lower platelet activity and improved vascular health in systemic lupus erythematosus. LID - 10.1136/lupus-2021-000475 [doi] LID - e000475 AB - OBJECTIVE: Hydroxychloroquine (HCQ) is a mainstay of therapy in the treatment of SLE. The effect of HCQ on platelets and vascular health is uncertain. We investigated the relationship between HCQ use and dose with platelet activity, platelet transcriptomics and vascular health in patients with SLE. METHODS: Platelet aggregation, platelet mRNA expression and vascular health (sublingual capillary perfused boundary region (PBR), red blood cell filling (RBCF) and brachial artery reactivity testing) were analysed by HCQ use and dose. RESULTS: Among 132 subjects with SLE (age: 39.7+/-12.9 years, 97% female), 108 were on HCQ. SLE disease activity was similar between subjects on and off HCQ. Platelet aggregation in response to multiple agonists was significantly lower in patients on HCQ. There were inverse relationships between HCQ dose and gene expression pathways of platelet activity. Gene expression of P-selectin (SELP) was inversely correlated with HCQ dose (r=-0.41, p=0.003), which was validated at the protein level. Subjects on HCQ had improved vascular function correlating with HCQ dose as measured by lower PBR (r=-0.52, p=0.007), higher RBCF (r=0.55, p=0.004) and greater brachial artery reactivity (r=0.43, p=0.056). CONCLUSION: HCQ use was associated with decreased platelet activation and activation-related transcripts and improved vascular health in SLE. CI - (c) Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. FAU - Cornwell, MacIntosh Grant AU - Cornwell MG AUID- ORCID: 0000-0002-3041-4410 AD - Institute for Systems Genetics, NYU Langone Health, New York City, New York, USA. AD - Division of Translational Medicine, New York University School of Medicine, New York City, New York, USA. FAU - Luttrell-Williams, Elliot S AU - Luttrell-Williams ES AD - Division of Cardiology, Department of Medicine, New York University Grossman School of Medicine, New York City, New York, USA. FAU - Golpanian, Michael AU - Golpanian M AD - Division of Rheumatology, Department of Medicine, New York University School of Medicine, New York City, New York, USA. FAU - El Bannoudi, Hanane AU - El Bannoudi H AD - Division of Cardiology, Department of Medicine, New York University Grossman School of Medicine, New York City, New York, USA. FAU - Myndzar, Khrystyna AU - Myndzar K AD - Division of Cardiology, Department of Medicine, New York University Grossman School of Medicine, New York City, New York, USA. FAU - Izmirly, Peter AU - Izmirly P AD - Division of Rheumatology, Department of Medicine, New York University School of Medicine, New York City, New York, USA. FAU - Belmont, H Michael AU - Belmont HM AD - Division of Rheumatology, Department of Medicine, New York University School of Medicine, New York City, New York, USA. FAU - Katz, Stuart AU - Katz S AD - Division of Translational Medicine, New York University School of Medicine, New York City, New York, USA. FAU - Smilowitz, Nathaniel R AU - Smilowitz NR AUID- ORCID: 0000-0002-6823-2815 AD - Division of Cardiology, Department of Medicine, New York University Grossman School of Medicine, New York City, New York, USA. FAU - Engel, Alexis AU - Engel A AD - Division of Rheumatology, Department of Medicine, New York University School of Medicine, New York City, New York, USA. FAU - Clancy, Robert AU - Clancy R AD - Division of Rheumatology, Department of Medicine, New York University School of Medicine, New York City, New York, USA. FAU - Ruggles, Kelly AU - Ruggles K AD - Institute for Systems Genetics, NYU Langone Health, New York City, New York, USA. AD - Division of Translational Medicine, New York University School of Medicine, New York City, New York, USA. FAU - Buyon, Jill P AU - Buyon JP AD - Division of Rheumatology, Department of Medicine, New York University School of Medicine, New York City, New York, USA. FAU - Berger, Jeffrey S AU - Berger JS AUID- ORCID: 0000-0001-8216-4647 AD - Division of Cardiology, Department of Medicine, New York University Grossman School of Medicine, New York City, New York, USA Jeffrey.Berger@nyumc.org. LA - eng GR - P50 AR070591/AR/NIAMS NIH HHS/United States GR - R01 HL139909/HL/NHLBI NIH HHS/United States GR - T32 GM136573/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - England TA - Lupus Sci Med JT - Lupus science & medicine JID - 101633705 RN - 0 (Antirheumatic Agents) RN - 4QWG6N8QKH (Hydroxychloroquine) SB - IM MH - Adult MH - Antirheumatic Agents/therapeutic use MH - Blood Platelets MH - Female MH - Humans MH - Hydroxychloroquine/therapeutic use MH - *Lupus Erythematosus, Systemic/drug therapy MH - Male MH - Middle Aged PMC - PMC7978255 OTO - NOTNLM OT - cardiovascular diseases OT - inflammation OT - lupus erythematosus OT - systemic COIS- Competing interests: None declared. EDAT- 2021/03/20 06:00 MHDA- 2021/09/18 06:00 PMCR- 2021/03/18 CRDT- 2021/03/19 06:36 PHST- 2021/01/07 00:00 [received] PHST- 2021/02/10 00:00 [revised] PHST- 2021/02/20 00:00 [accepted] PHST- 2021/03/19 06:36 [entrez] PHST- 2021/03/20 06:00 [pubmed] PHST- 2021/09/18 06:00 [medline] PHST- 2021/03/18 00:00 [pmc-release] AID - 8/1/e000475 [pii] AID - lupus-2021-000475 [pii] AID - 10.1136/lupus-2021-000475 [doi] PST - ppublish SO - Lupus Sci Med. 2021 Mar;8(1):e000475. doi: 10.1136/lupus-2021-000475.