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Comparison of the Effects of General Anesthesia and Combined Spinal-Epidural Anesthesia on Ferroptosis, Humanin and MOTS-c Levels in Renal Transplantation

2026年7月6日 更新者:Berna Kaya Ugur、University of Gaziantep

Comparison of the Effects of General Anesthesia and Combined Spinal-Epidural Anesthesia on Ferroptosis, Humanin and MOTS-c Levels in Renal Transplantation: A Prospective Controlled Study

Renal transplantation is the most effective renal replacement therapy for patients with end-stage renal disease. Ischemia-reperfusion injury may adversely affect graft function and long-term outcomes. Ferroptosis has recently emerged as a potential mechanism involved in ischemia-reperfusion injury, while the mitochondrial-derived peptides humanin and MOTS-c are thought to exert protective effects against oxidative stress. However, the effects of different anesthetic techniques on these biomarkers in kidney transplant recipients have not been investigated.

This prospective controlled study aims to compare the effects of sevoflurane general anesthesia (SGA) and combined spinal-epidural anesthesia (CSEA) on serum ferroptosis markers, humanin, and MOTS-c levels in adult kidney transplant recipients. Blood samples will be obtained perioperatively for biomarker analysis.

The primary objective of the study is to evaluate the effects of the anesthetic technique on serum ferroptosis markers, humanin, and MOTS-c levels. Secondary objectives include evaluating early graft function and postoperative outcomes by assessing the incidence of delayed graft function, postoperative serum creatinine levels, requirement for dialysis, urine output, length of hospital stay, and the association of these outcomes with perioperative biomarker levels.

調査の概要

状態

募集

条件

介入・治療

詳細な説明

Renal transplantation represents the most effective form of renal replacement therapy for patients with end-stage renal disease; however, ischemia-reperfusion injury remains a major determinant of early graft dysfunction and long-term transplant outcomes.

Ferroptosis, an iron-dependent form of regulated cell death characterized by lipid peroxidation, has recently been proposed as an important mechanism contributing to ischemia-reperfusion-related tissue injury. In addition, mitochondrial-derived peptides such as humanin and MOTS-c have been identified as key regulators of cellular stress responses and may exert protective effects against oxidative damage. Despite these emerging findings, the influence of anesthetic technique on ferroptosis-related pathways and mitochondrial protective peptides in kidney transplantation has not yet been fully elucidated.

This prospective controlled study is designed to evaluate the effect of anesthetic technique on perioperative biochemical and clinical outcomes in renal transplant recipients. Adult patients undergoing kidney transplantation will receive either sevoflurane-based general anesthesia (SGA) or combined spinal-epidural anesthesia (CSEA). The two anesthetic strategies will be compared in terms of their effects on circulating ferroptosis-related biomarkers, as well as serum levels of humanin and MOTS-c.

Peripheral arterial blood samples will be obtained at two standardized points: immediately before anesthesia induction (T1) and immediately prior to extubation (T2). Following collection, blood samples will be centrifuged, and serum aliquots will be stored under appropriate conditions at -80°C until batch analysis. Serum levels of ferroptosis-related biomarkers, humanin, and MOTS-c will be measured using enzyme-linked immunosorbent assay (ELISA) and standard biochemical techniques.

The primary objective of the study is to assess the effect of anesthetic technique on perioperative changes in serum ferroptosis-related biomarkers and mitochondrial-derived peptides (humanin and MOTS-c).

The secondary objectives are to evaluate early postoperative graft function and clinical recovery parameters, including incidence of delayed graft function, postoperative serum creatinine levels, requirement for dialysis, urine output, and length of hospital stay. In addition, the association between perioperative biomarker levels and clinical outcomes will be analyzed to explore potential predictive relationships.

It is anticipated that this study will provide further insight into the relationship between anesthetic technique, ferroptosis pathways, and mitochondrial-mediated cytoprotection in renal transplantation. The results may contribute to improved understanding of perioperative biological responses and support optimization of anesthetic strategies aimed at enhancing graft outcomes.

研究の種類

介入

入学 (推定)

68

段階

  • 適用できない

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究連絡先のバックアップ

研究場所

    • State/Province
      • Gaziantep、State/Province、トルコ(Türkiye)、27310
        • 募集
        • Gaziantep University Faculty of Medicine Hospital
        • コンタクト:
        • コンタクト:
        • 主任研究者:
          • Berna KAYA UĞUR, Doç. Dr.
        • 副調査官:
          • Abdulkadir Uçar, MD

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 大人
  • 高齢者

健康ボランティアの受け入れ

いいえ

説明

Inclusion Criteria:

  • Patients aged 18-70 years with American Society of Anesthesiologists (ASA) physical status I-III.
  • Patients scheduled for elective living-donor allogeneic kidney transplantation.
  • Patients receiving sevoflurane-based general anesthesia as the anesthetic technique.
  • Patients receiving combined spinal-epidural anesthesia as the anesthetic technique.

Exclusion Criteria:

  • Patients younger than 18 years or older than 70 years.
  • Patients undergoing deceased-donor kidney transplantation.
  • Patients receiving total intravenous anesthesia (TIVA).
  • Patients who decline to participate in the study or are unable to provide informed consent.
  • Patients with American Society of Anesthesiologists (ASA) physical status IV or V.
  • Patients with a history of previous organ transplantation.
  • Patients with known or suspected mitochondrial disorders.
  • Patients with a history of chronic corticosteroid use.
  • Patients requiring red blood cell transfusion intraoperatively or within the first 24 postoperative hours.
  • Patients with a primary warm ischemia time >5 minutes, secondary warm ischemia time >30 minutes, or cold ischemia time >60 minutes.

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか?

デザインの詳細

  • 主な目的:基礎科学
  • 割り当て:非ランダム化
  • 介入モデル:並列代入
  • マスキング:独身

武器と介入

参加者グループ / アーム
介入・治療
アクティブコンパレータ:Sevoflurane General Anesthesia (SGA)
Participants in this group will receive sevoflurane general anesthesia according to standard institutional protocols for kidney transplantation.
Participants will receive standardized sevoflurane general anesthesia according to institutional kidney transplantation protocols. Anesthesia induction will include preoxygenation with 100% oxygen for 3-5 minutes, followed by intravenous propofol (1.5-2.5 mg/kg), fentanyl (1-2 µg/kg), and rocuronium bromide (0.6 mg/kg). Endotracheal intubation will be performed after short mask ventilation using direct laryngoscopy, and correct placement will be confirmed by auscultation. Anesthesia maintenance will be provided with sevoflurane (1.5-2.0% end-tidal) in a 40-50% oxygen/air mixture and remifentanil infusion (0.05-0.2 µg/kg/min). Mechanical ventilation will be set to 6-8 mL/kg tidal volume, PEEP 5 cmH₂O, and end-tidal CO₂ 35-40 mmHg. At the end of surgery, sevoflurane will be discontinued, neuromuscular blockade will be reversed with sugammadex (2-4 mg/kg), and extubation will be performed after recovery. Postoperative analgesia will include subcutaneous morphine (0.1 mg/kg).
他の名前:
  • Sevoflurane anesthesia
アクティブコンパレータ:Combined Spinal-Epidural Anesthesia (CSEA)
Participants in this group will receive combined spinal-epidural anesthesia as the anesthetic technique for kidney transplantation.
Participants will receive combined spinal-epidural anesthesia under sterile conditions according to institutional protocols. The L3-L4 interspace will be identified, and local anesthesia will be administered with lidocaine (2-3 mL, 2%). A Tuohy needle will be inserted using a midline approach, and the epidural space will be identified using loss-of-resistance technique. Spinal anesthesia will be achieved via intrathecal injection of 2.5 mL of 0.5% hyperbaric bupivacaine after confirmation of cerebrospinal fluid flow. An epidural catheter will then be placed and secured. Sedation will be provided with intravenous midazolam (1-2 mg), and oxygen will be administered via nasal cannula (4 L/min). Intraoperative analgesia will be maintained with epidural 0.25% bupivacaine as needed. At the end of surgery, epidural morphine (3 mg) combined with 0.25% bupivacaine will be administered for postoperative analgesia.
他の名前:
  • CSE anesthesia

この研究は何を測定していますか?

主要な結果の測定

結果測定
メジャーの説明
時間枠
Serum ferroptosis-related biomarkers (Fe, TFRC1, GPX4, MDA, ACSL4) and mitochondrial-derived peptides (humanin and MOTS-c)
時間枠:Immediately before anesthesia induction and immediately before extubation (intraoperative period)
The primary outcome is the perioperative change in serum levels of ferroptosis-related biomarkers and mitochondrial-derived peptides, including humanin and MOTS-c, between two standardized time points. Blood samples will be collected immediately prior to anesthesia induction and immediately prior to extubation. Biomarker levels will be quantified using ELISA-based and standard biochemical methods. The primary comparison will evaluate differences in biomarker changes between the sevoflurane general anesthesia (SGA) and combined spinal-epidural anesthesia (CSEA) groups.
Immediately before anesthesia induction and immediately before extubation (intraoperative period)

二次結果の測定

結果測定
メジャーの説明
時間枠
Delayed Graft Function (DGF)
時間枠:Postoperative days 0-7
Delayed graft function will be defined as the requirement for dialysis within the first 7 postoperative days or a reduction in serum creatinine of less than 30% during the first 48 hours after transplantation. The incidence of delayed graft function will be compared between the study groups.
Postoperative days 0-7
Postoperative Serum Creatinine Levels
時間枠:Postoperative days 1-7
Serial serum creatinine levels will be measured daily during the first postoperative week to evaluate early renal graft function and recovery.
Postoperative days 1-7
Requirement for Postoperative Dialysis
時間枠:Within first 7 postoperative days
The need for dialysis during the early post-transplant period will be recorded as a clinical indicator of graft dysfunction.
Within first 7 postoperative days
Urine Output
時間枠:Intraoperative period and first 24 postoperative hours
Hourly urine output will be monitored to assess immediate graft perfusion and early functional recovery.
Intraoperative period and first 24 postoperative hours
Length of Hospital Stay
時間枠:From surgery until discharge (up to 30 days)
Total duration of postoperative hospitalization will be recorded as a measure of overall recovery and clinical course.
From surgery until discharge (up to 30 days)
Association Between Biomarkers and Clinical Outcomes
時間枠:Perioperative period and first 7 postoperative days
Correlation analyses will be performed to evaluate the relationship between perioperative biomarker levels (ferroptosis markers, humanin, and MOTS-c) and early clinical outcomes, including delayed graft function, serum creatinine levels, and urine output.
Perioperative period and first 7 postoperative days

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

協力者

捜査官

  • 主任研究者:Berna KAYA UĞUR, Doç. Dr.、University of Gaziantep

出版物と役立つリンク

研究に関する情報を入力する責任者は、自発的にこれらの出版物を提供します。これらは、研究に関連するあらゆるものに関するものである可能性があります。

一般刊行物

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (実際)

2026年3月1日

一次修了 (推定)

2026年10月1日

研究の完了 (推定)

2026年10月15日

試験登録日

最初に提出

2026年6月24日

QC基準を満たした最初の提出物

2026年6月24日

最初の投稿 (実際)

2026年7月1日

学習記録の更新

投稿された最後の更新 (実際)

2026年7月8日

QC基準を満たした最後の更新が送信されました

2026年7月6日

最終確認日

2026年7月1日

詳しくは

本研究に関する用語

個々の参加者データ (IPD) の計画

個々の参加者データ (IPD) を共有する予定はありますか?

いいえ

IPD プランの説明

Individual participant data will not be publicly shared. Data may be available from the corresponding investigator upon reasonable request and after approval by the local ethics committee.

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米国FDA規制機器製品の研究

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