Journals / Çukurova Anestezi ve Cerrahi Bilimler Dergisi / 2026 / Cilt: 9 Sayı: 2

Effects of Anti-IL-17 Therapy on Serum Red Cell Distribution Width and Mean Platelet Volume in Ankylosing Spondylitis: A Retrospective Cohort Study

Anti-IL-17 Tedavisinin Ankilozan Spondilit Hastalarında Serum Kırmızı Hücre Dağılım Genişliği ve Ortalama Trombosit Hacmi Üzerine Etkileri: Retrospektif Kohort Çalışması

Emrah Koç(SAĞLIK BİLİMLERİ ÜNİVERSİTESİ, ADANA ŞEHİR SAĞLIK UYGULAMA VE ARAŞTIRMA MERKEZİ)0000-0002-7889-3051
Suade Özlem Badak(SAĞLIK BİLİMLERİ ÜNİVERSİTESİ, ADANA ŞEHİR SAĞLIK UYGULAMA VE ARAŞTIRMA MERKEZİ)0000-0002-4661-787X
Pages
340–348
Publication Date
2026-06-30
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

These findings align with emerging evidence from psoriasis studies and suggest potential common mechanisms across IL-17-driven inflammatory diseases.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:ABSTRACT Objective: To investigate the effects of anti-IL-17 therapy on serum red cell distribution width (RDW) and mean platelet volume (MPV) in patients with ankylosing spondylitis (AS) and to evaluate their relationship with disease activity markers.
📊
Key Findings & Data:While anti-IL-17 inhibitors have demonstrated superior efficacy in AS, their effects on readily available hematologic biomarkers remain underexplored, representing a knowledge gap in clinical practice.
💡
Conclusion & Impact:These findings align with emerging evidence from psoriasis studies and suggest potential common mechanisms across IL-17-driven inflammatory diseases.
🔬Design:Araştırma Makalesi
📍Scope:2022 Verileri
⚙️Variables:ankilozan spondilit · anti-IL-17 · RDW

Abstract

ABSTRACT Objective: To investigate the effects of anti-IL-17 therapy on serum red cell distribution width (RDW) and mean platelet volume (MPV) in patients with ankylosing spondylitis (AS) and to evaluate their relationship with disease activity markers. While anti-IL-17 inhibitors have demonstrated superior efficacy in AS, their effects on readily available hematologic biomarkers remain underexplored, representing a knowledge gap in clinical practice. Methods: This retrospective cohort study included 130 AS patients (86 males, 44 females; mean age 35.7 ± 8.9 years) receiving anti-IL-17 inhibitors (secukinumab or ixekizumab). Pre-treatment and post-treatment (mean 21.4 ± 19.0 months) RDW, MPV, Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP) were recorded. Treatment adherence was assessed through patient self-report and medication refill records from the hospital pharmacy database. Paired t-tests with Bonferroni correction and Pearson correlation analyses were performed. The study was approved by the Clinical Research Ethics Committee (Date: 27.01.2022, Decision No: 1761). Results: Anti-IL-17 therapy resulted in significant reductions in RDW (15.43 ± 0.79 vs. 14.60 ± 0.83%, p < 0.001; Cohen's d = 2.94; -5.4% change), MPV (10.46 ± 0.71 vs. 10.16 ± 0.74 fL, p < 0.001; Cohen's d = 1.48; -2.8% change), BASDAI (6.53 ± 1.27 vs. 3.30 ± 1.51, p < 0.001; Cohen's d = 4.28; -49.4% change), ESR (27.19 ± 12.27 vs. 15.29 ± 12.23 mm/h, p < 0.001; Cohen's d = 1.80; -43.8% change), and CRP (17.42 ± 9.26 vs. 9.21 ± 8.72 mg/L, p < 0.001; Cohen's d = 1.40; -47.1% change). Good clinical response (≥50% BASDAI reduction) was achieved in 48.5% of patients. Subgroup analyses revealed that older patients (≥40 years) and those with longer disease duration (≥5 years) showed greater MPV reduction. Primary treatment failure occurred in 6.9%, secondary failure in 7.7%, and inflammatory bowel disease development in 3.1% of patients. Pre-treatment RDW correlated significantly with BASDAI (r = 0.33, p < 0.001), ESR (r = 0.45, p < 0.001), and CRP (r = 0.42, p < 0.001). Conclusion: Anti-IL-17 therapy effectively suppresses disease activity and systemic inflammation in AS patients. The significant reductions in RDW and MPV alongside clinical and inflammatory markers suggest that these readily available hematologic parameters may serve as adjunctive biomarkers for monitoring treatment response and systemic inflammation in AS. These findings align with emerging evidence from psoriasis studies and suggest potential common mechanisms across IL-17-driven inflammatory diseases.

Özet

ÖZET Amaç: Ankilozan spondilit (AS) hastalarında anti-IL-17 tedavisinin serum kırmızı hücre dağılım genişliği (RDW) ve ortalama trombosit hacmi (MPV) üzerindeki etkilerini araştırmak ve bu parametrelerin hastalık aktivite belirteçleri ile ilişkisini değerlendirmektir. Anti-IL-17 inhibitörleri AS'ta üstün etkinlik göstermesine rağmen, kolayca erişilebilen hematolojik biyobelirteçler üzerindeki etkileri yeterince araştırılmamıştır ve bu klinik uygulamada bir bilgi boşluğu oluşturmaktadır. Yöntemler: Bu retrospektif kohort çalışması, Ocak 2020 ile Aralık 2023 arasında anti-IL-17 inhibitörü tedavisi (secukinumab veya ixekizumab) alan 130 AS hastasını (86 erkek, 44 kadın; ortalama yaş 35,7 ± 8,9 yıl) içermektedir. Tedavi öncesi ve sonrası (ortalama 21,4 ± 19,0 ay) RDW, MPV, Bath Ankilozan Spondilit Hastalık Aktivite İndeksi (BASDAI), eritrosit sedimantasyon hızı (ESR) ve C-reaktif protein (CRP) kaydedilmiştir. Tedavi uyumu, hasta öz-bildirimi ve hastane eczane veri tabanından ilaç yenileme kayıtları aracılığıyla değerlendirilmiştir. Bonferroni düzeltmesi ile eşleştirilmiş t-testleri ve Pearson korelasyon analizleri yapılmıştır. Çalışma Klinik Araştırma Etik Kurulu tarafından onaylanmıştır (Tarih: 27.01.2022, Karar No: 1761). Sonuçlar: Anti-IL-17 tedavisi, RDW'de (15,43 ± 0,79 vs. 14,60 ± 0,83%, p < 0,001; Cohen's d = 2,94; -%5,4 değişim), MPV'de (10,46 ± 0,71 vs. 10,16 ± 0,74 fL, p < 0,001; Cohen's d = 1,48; -%2,8 değişim), BASDAI'de (6,53 ± 1,27 vs. 3,30 ± 1,51, p < 0,001; Cohen's d = 4,28; -%49,4 değişim), ESR'de (27,19 ± 12,27 vs. 15,29 ± 12,23 mm/h, p < 0,001; Cohen's d = 1,80; -%43,8 değişim) ve CRP'de (17,42 ± 9,26 vs. 9,21 ± 8,72 mg/L, p < 0,001; Cohen's d = 1,40; -%47,1 değişim) anlamlı azalmalara neden olmuştur. İyi klinik yanıt (≥%50 BASDAI azalması) hastaların %48,5'inde elde edilmiştir. Alt grup analizleri, daha yaşlı hastalar (≥40 yaş) ve daha uzun hastalık süresine sahip olanların (≥5 yıl) daha fazla MPV azalması gösterdiğini ortaya koymuştur. Birincil tedavi başarısızlığı %6,9, ikincil başarısızlık %7,7 ve inflamatuar bağırsak hastalığı gelişimi hastaların %3,1'inde görülmüştür. Tedavi öncesi RDW, BASDAI (r = 0,33, p < 0,001), ESR (r = 0,45, p < 0,001) ve CRP (r = 0,42, p < 0,001) ile anlamlı şekilde ilişkili bulunmuştur. Sonuç: Anti-IL-17 tedavisi, AS hastalarında hastalık aktivitesini ve sistemik inflamasyonu etkili bir şekilde bastırmaktadır. RDW ve MPV'deki anlamlı azalmalar, klinik ve inflamatuar belirteçler ile birlikte, bu kolayca erişilebilen hematolojik parametrelerin AS'ta tedavi yanıtını ve sistemik inflamasyonu izlemek için yardımcı biyobelirteçler olarak hizmet edebileceğini göstermektedir. Bu bulgular psoriasis çalışmalarından ortaya çıkan kanıtlarla uyumludur ve IL-17 tarafından yönlendirilen inflamatuar hastalıklar arasında ortak mekanizmalar olabileceğini göstermektedir.

🔖

Cite This Article

Koç, E., Badak, S. Ö. (2026). Effects of Anti-IL-17 Therapy on Serum Red Cell Distribution Width and Mean Platelet Volume in Ankylosing Spondylitis: A Retrospective Cohort Study. Çukurova Anestezi ve Cerrahi Bilimler Dergisi, Cilt: 9 Sayı: 2, 340–348. https://doi.org/10.36516/jocass.1882577

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (26)

  1. Sieper J, Poddubnyy D. Axial spondyloarthritis. Lancet. 2017;390(10089):73-84.
  2. Stolwijk C, van Tubergen A, Castillo-Ortiz JD, Boonen A. Prevalence of extra-articular manifestations in patients with ankylosing spondylitis: a systematic review and meta-analysis. Ann Rheum Dis. 2016;74(1):65-73.
  3. Baeten D, Baraliakos X, Braun J, et al. Anti-interleukin-17A monoclonal antibody secukinumab in treatment of ankylosing spondylitis: a randomised, double-blind, placebo-controlled trial. Lancet. 2015;382(9906):1705-1713.
  4. Shen H, Goodall JC. The role of IL-17 in the pathogenesis of inflammatory arthritis. Arthritis Res Ther. 2009;11(5):249.
  5. Huang JX, Zhang LJ, Wei JCC. Interleukin-17 inhibitors for the treatment of ankylosing spondylitis. Rheumatol Immunol Res. 2020;1(1):25-29.
  6. Sezgin M, Tecer D, Kanık A, et al. Serum RDW and MPV in ankylosing spondylitis: can they show the disease activity? Clin Hemorheol Microcirc. 2017;65(1):1-10.
  7. Deng J, Xu S, Gao X, Xu S, Shuai Z, Pan F. Red cell distribution width and mean platelet volume in patients with ankylosing spondylitis: a systematic review and meta-analysis. J Clin Rheumatol. 2021;27(7):292-297.
  8. Esen M, Gökdeniz O, Karaman K, Canat HD. The effect of IL17 and IL23 inhibitors on hematological parameters and C-reactive protein in psoriasis patients. Cutan Ocul Toxicol. 2023;43(1):38-45.
  9. Lippi G, Targher G, Montagnana M, et al. Relation between red blood cell distribution width and inflammatory biomarkers in a large cohort of unselected outpatients. Arch Pathol Lab Med. 2009;133(4):628-632.
  10. Nairz M, Theurl I, Wolf D, Weiss G. Iron deficiency or anemia of inflammation? Differential diagnosis and mechanisms of anemia of chronic disease. Wien Klin Wochenschr. 2016;128(15-16):599-609.
  11. Gasparyan AY, Ayvazyan L, Mikhailidis DP, Kitas GD. Mean platelet volume in patients with rheumatoid arthritis: the effect of anti-TNF-α therapy. Rheumatol Int. 2011;31(9):1231-1236.
  12. Smolen JS, Aletaha D, McInnes IB. Rheumatoid arthritis. Lancet. 2016;388(10055):2023-2038.
  13. Omenetti S, Bussi C. The Treg/Th17 axis: a dynamic balance regulated by the gut microbiota. Front Immunol. 2016;7:201.
  14. Şener G, Yuksel EI, Gökdeniz O, et al. The relationship of hematological parameters and CRP with disease presence, severity, and response to systemic therapy in patients with psoriasis. Cureus. 2023;15(8):e43790.
  15. Hammoura I, Fiechter RH, van Mens LJJ, et al. Dual impact of interleukin-17A blockade on inflammatory and stromal pathways in peripheral spondyloarthritis. Arthritis Res Ther. 2025;27(1):206.
  16. Ciccia F, Guggino G, Rizzo A. JAK inhibition and axial spondyloarthritis: new steps on the therapeutic pathway. Front Immunol. 2025;16:1488357.
  17. Zhao SS, Harrison SR, Thompson B, et al. The 2025 British Society for Rheumatology guideline for the treatment of axial spondyloarthritis with biologic and targeted synthetic DMARDs. Rheumatology (Oxford). 2025;64(6):3242.
  18. Elkholy A, Efat A, Shoeib S, et al. Platelet Indices and RDW to Assess Inflammatory Milieu in Subclinical Hashimoto’s Thyroiditis. Clin Med Insights Endocrinol Diabetes. 2025;18:11795514251349337.
  19. Ajmi M, Mtiraoui N, Ezzaier A, et al. Complete blood count-derived biomarkers as indicators of systemic inflammation. Lupus. 2025;12(2):e001795.
  20. Khan HA, Al-Asmari AK, Al-Obeed OA. Association of Red Cell Distribution Width and Mean Platelet Volume with disease activity in rheumatoid arthritis. Clin Rheumatol. 2024;43(1):1-7.
  21. Puig L, Augustin M, Blauvelt A. Real-World Evidence for Ixekizumab in the Treatment of Psoriasis and Axial Spondyloarthritis. Adv Ther. 2025;42(1):3258-3259.
  22. Okutan İ, Ugan Y. New inflammatory markers associated with disease activity in rheumatic diseases. Rheumatol Int. 2024;44(1):1-10.
  23. Kang Z, Altuntas CZ, Gulen MF, et al. Astrocyte-restricted ablation of interleukin-17-induced Act1-mediated signaling ameliorates autoimmune encephalomyelitis. Immunity. 2010;32(3):414-425.
  24. Yao Z, Fanslow WC, Seldin MF, et al. Herpesvirus Saimiri encodes a new cytokine, IL-17, which binds to a novel cytokine receptor. Immunity. 1995;3(6):811-821.
  25. Ley K, Laudanna C, Cybulsky MI, Nourshargh S. Getting to the site of inflammation: the leukocyte adhesion cascade updated. Nat Rev Immunol. 2007;7(9):678-689.
  26. Esen M, Gökdeniz O, Karaman K, Canat HD. The effect of IL17 and IL23 inhibitors on hematological parameters and CRP in psoriasis patients. Cutan Ocul Toxicol. 2023;43(1):38-45.