Journals / Dicle Tıp Dergisi / 2026 / Cilt: 53 Sayı: 1

Association Between Neuropathic Pain and Serum Interleukin-6 and C-Reactive Protein Levels in Patients with Stage 3 to 5 Chronic KidneyDisease

Evre 3-4 ve Evre 5 Kronik Böbrek Hastalığı Olan Hastalarda Nöropatik Ağrı ile Serum İnterlökin-6 ve C-Reaktif Protein Düzeyleri Arasındaki İlişki

Mehmet Kiracı(GAZI UNIVERSITY)
Taha Enes Cetin(Gazi University)
Veysel Baran Tomar(Gazi University)
Saliha Yildirim(Sincan Training and Research Hospital)
Özant Helvacı(Gazi University)
Ülver Derici(Gazi University)
Galip Guz(Gazi University)
Pages
47–57
Publication Date
2026-03-10
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AI Summary & Key Takeaways

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

IL-6 may be a more reliable biomarker than CRP, highlighting the role of systemic inflammation in CKD-related neuropathy.

📌 3 Key Takeaways

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Objective & Hypothesis:Background: Chronic kidney disease (CKD) is commonly associated with peripheral neuropathy, yet its pathophysiology remains incompletely understood.
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Key Findings & Data:Inflammatory markers, particularly interleukin-6 (IL-6) and C-reactive protein (CRP), are thought to play a role in the development and persistence of neuropathic pain.
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Conclusion & Impact:IL-6 may be a more reliable biomarker than CRP, highlighting the role of systemic inflammation in CKD-related neuropathy.
🔬Design:Survey & Empirical Study
📍Scope:Comprehensive Sample
⚙️Variables:Nöropatik Ağrı · Kronik Böbrek Hastalığı · İnterlökin-6

Abstract

Background: Chronic kidney disease (CKD) is commonly associated with peripheral neuropathy, yet its pathophysiology remains incompletely understood. Inflammatory markers, particularly interleukin-6 (IL-6) and C-reactive protein (CRP), are thought to play a role in the development and persistence of neuropathic pain. This study aimed to evaluate the relationship between neuropathic pain and serum IL-6 and CRP levels in patients with stage 3–5 CKD. Methods: This prospective single-center study included 80 patients: 40 with stage 3–4 CKD and 40 with stage 5 CKD on dialysis (5D). Neuropathic pain was assessed using the PainDETECT questionnaire. Serum IL-6 and CRP levels were measured, and their associations with neuropathic pain were analyzed using correlation analysis, ROC curves, and multivariate logistic regression. Results: Neuropathic pain was present in 44% of stage 3–4 and 73% of stage 5D patients. PainDETECT scores were significantly higher in stage 5D (p=0.009) and showed moderate positive correlations with IL-6 (r=0.642, p<0.001) and CRP (r=0.354, p=0.001). ROC analysis identified IL-6 as a strong predictor of neuropathic pain (AUC: 0.808, cut-off: 8.5 pg/mL), while CRP showed lower predictive ability (AUC: 0.658). IL-6 was the only independent predictor in multivariate analysis (OR: 1.155, p=0.005). Although HbA1c was not associated with neuropathic pain, diabetes duration showed a strong correlation with PainDETECT scores in diabetic patients. Conclusion: Elevated IL-6 is significantly associated with neuropathic pain in CKD, particularly in pre-dialysis patients. IL-6 may be a more reliable biomarker than CRP, highlighting the role of systemic inflammation in CKD-related neuropathy.

Özet

Giriş: Kronik böbrek hastalığı (KBH), sıklıkla periferik nöropati ile ilişkilidir; ancak altta yatan patofizyolojik mekanizmalar tam olarak açıklığa kavuşmamıştır. İnflamatuvar belirteçler, özellikle interlökin-6 (IL-6) ve C-reaktif protein (CRP), nöropatik ağrının gelişimi ve devamında rol oynayabilir. Bu çalışmanın amacı, evre 3–5 KBH hastalarında nöropatik ağrı ile serum IL-6 ve CRP düzeyleri arasındaki ilişkiyi değerlendirmektir. Yöntemler: Bu prospektif, tek merkezli çalışmaya evre 3–4 KBH’li 40 hasta ile diyalize giren evre 5 (5D) KBH’li 40 hasta olmak üzere toplam 80 hasta dahil edildi. Nöropatik ağrı değerlendirmesi PainDETECT anketi ile yapıldı. Serum IL-6 ve CRP düzeyleri ölçüldü; bu biyobelirteçlerin nöropatik ağrı ile ilişkileri korelasyon analizi, ROC eğrisi ve çok değişkenli lojistik regresyon yöntemleriyle analiz edildi. Bulgular: Nöropatik ağrı, evre 3–4 hastalarda %44, evre 5D hastalarda ise %73 oranında saptandı. PainDETECT skorları evre 5D hastalarda anlamlı olarak daha yüksekti (p=0,009) ve IL-6 (r=0,642, p<0,001) ile CRP (r=0,354, p=0,001) düzeyleriyle orta düzeyde pozitif korelasyon gösterdi. ROC analizinde IL-6, nöropatik ağrıyı öngörmede güçlü bir belirteç olarak tanımlandı (AUC: 0,808; cut-off: 8,5 pg/mL). CRP'nin öngörü gücü daha düşüktü (AUC: 0,658). Çok değişkenli analizde yalnızca IL-6 bağımsız bir prediktör olarak saptandı (OR: 1,155; p=0,005). HbA1c ile nöropatik ağrı arasında anlamlı ilişki bulunmazken, diyabet süresi ile PainDETECT skorları arasında güçlü bir korelasyon mevcuttu. Sonuç: Serum IL-6 düzeyindeki artış, özellikle diyaliz öncesi KBH hastalarında nöropatik ağrı ile anlamlı şekilde ilişkilidir. IL-6, CRP'ye kıyasla daha duyarlı ve özgül bir biyobelirteç olabilir. Bu bulgular, KBH’ye bağlı nöropatide sistemik inflamasyonun önemli rolünü ve IL-6'nın klinik bir belirteç olarak potansiyel değerini ortaya koymaktadır.

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Cite This Article

Kiracı, M., Cetin, T. E., Tomar, V. B., Yildirim, S., Helvacı, Ö., Derici, Ü., Guz, G., *, V. B. T. (2026). Association Between Neuropathic Pain and Serum Interleukin-6 and C-Reactive Protein Levels in Patients with Stage 3 to 5 Chronic KidneyDisease. Dicle Tıp Dergisi, Cilt: 53 Sayı: 1, 47–57. https://doi.org/10.5798/dicletip.1906414

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