Melatonin in Patients Under Carotid Endarterectomy

Study Overview
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Brief Summary
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The main purpose of this study is to evaluate the effects of melatonin in the regulation of the vascular injury in patients under carotid endarterectomy through population-based, randomized, double-blind, placebo-controlled trial.

Detailed Description
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Trial Title: The protective effect of melatonin in patients under carotid endarterectomy Protocol: Investigators recruited eligible Han Chinese participants (aged 40-80) who were diagnosed with carotid stenosis and had indications for carotid endarterectomy (CEA). Participants were excluded if participants had undergone surgical contraindication, or cardiovascular disease, or cerebral infarction within 3 months, or psychiatric disorders, or cancer, or pregnant, or lactating, or taking antipsychotic drugs during perioperative period. Participants were randomly divided into groups of CEA with oral melatonin, CEA with oral placebo, and CEA with blank control. Participants in groups of CEA with oral melatonin and CEA with oral placebo took melatonin orally 6mg/day or placebo from 3 days before operation to 3 days after operation. Blood samples (about 3 milliliter) were taken at baseline, 6h after the operation and 24h after the operation. Through a series hospital clinical laboratory and related ELISA kits to detect endothelial cell injury and ischemia reperfusion in serum markers. Superoxide dismutase (SOD), malonaldehyde (MDA), S100B protein, endothelial nitric oxide synthase (eNOS), nuclear erythroid 2-related factor 2 (Nrf - 2), Interleukin 6 (IL-6), nuclear transcription factor κB p65 (NF-κB p65) were included for analysis to verify whether melatonin have protective effect in patients under carotid endarterectomy. This trial is approved by the Ethical Committee of Peking Union Medical College Hospital (No ZS 1057). All participants completed a questionnaire and signed an informed consent document. Otherwise, participants will get appropriate economic compensation. To achieve treatment concealment, melatonin and placebo in appearance and package were identically. Trial associates monitored compliance with the masking procedure throughout the trial. All participants and study investigators were unaware of treatment allocation throughout the study. The randomization codes remained sealed until after data collection and cleaning, and completion of a masked analysis. The study team monitored and classified protocol deviations. Investigators summarized baseline clinical and demographic characteristics with descriptive statistics and then determined by the Univariate Analysis of Variance. All the data analyses were done using statistical software SPSS 20.0. Expected results: Compared with patients under CEA with placebo or blank, patients took melatonin have a lower vascular injury and ischemia reperfusion injury. Consent document: The potential risk, research as a treatment drug of melatonin may delay the metabolism of antipsychotic antipsychotic drug, so when investigators recruit psychiatric disorders or taking antipsychotic drugs orally during the 2 weeks of the trial should exclusion. As a Health care medicine. Melatonin is not suitable for children, so investigators selected recruiting participants under the age of 40 to 80. The measure to minimize the risk, fully inform the participants and their families the trial's advantages, disadvantages and desired effect. All participants totally agree with the subjects. In this process, at least three or more effective way to get contact with the medical staff or doctor and ensure that those unexpected accident should deserve effective tackle. Participants guarantee to comply with the criterion before start of the trial. Our research involves the application of melatonin is through the china food and drug administration (CFDA) approved to ensure its safety (include its chemical composition, structure, content parameters, main raw material and appropriate crowd). All staff is qualified medical professionals to guarantee the safety of all participants. The potential risks or discomfort, or inconvenience, or benefits for participants: So far, effective of melatonin in human include regulating sleep, anti-tumor, immune regulation, regulating of inflammation and immune and regulating blood lipid metabolism is confirmed. Adverse reactions is slow the delay of antipsychotic drug metabolism (so nearly one month ago and during period of the trial participants should not taking antipsychotic drugs) during the trial. The basic principle during the trial is ensure safety of participants. The relevant content consultation: Everyone have the right to consultation the research content through telephone: +86 01069152500 (principal investigator) and +86 01069155817(Ethics committee). The rights of withdrew from the trial: Participate in the trial is completely voluntary. If for any reason, participants not willing to participate in, or do not wish to continue to participate in this trial, will not affect the rights and interests of participants. In addition, participants have the right to withdraw this trial at any time. If participants do not according to the doctor instructions, or for the sake of your health and benefits, the doctor or the researchers may also require participants to quit the trial. The compensation of research: If the participants have any unexpected accident relation with the trial, the compensation and responsibility will be provided by Peking union medical college hospital. Privacy protection: The privacy of every participant will be protected. The results of the trial in academic publications will not leak any information to identify your personal identity. Peking union medical college hospital will save everybody's data and guarantee not leak without authorization. Investigators declare no competing interests.

Official Title
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The Protective Effect of Melatonin in Patients Under Carotid Endarterectomy

Conditions
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Carotid Stenosis

Intervention / Treatment
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* Drug: Melatonin
* Drug: placebo
* Other: blank


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: diagnosed with carotid stenosis had indications for carotid endarterectomy (CEA) Exclusion Criteria: surgical contraindication cardiovascular disease cerebral infarction within 3 months psychiatric disorders cancer pregnant lactating taking antipsychotic drugs during perioperative period

Ages Eligible for Study
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Minimum Age: 40 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: CEA with melatonin<br>Patients under CEA with melatonin taken during perioperative period. | Drug: Melatonin<br>* Patients under CEA taking 6mg/day melatonin orally from 3 days before operation to 3 days after operation.<br>|
| Placebo Comparator: CEA with placebo<br>Patients under CEA with placebo taken during perioperative period. | Drug: placebo<br>* Patients under CEA taking placebo orally from 3 days before operation to 3 days after operation.<br>|
| Sham Comparator: CEA with blank control<br>Patients under CEA with nothing unnecessary taken during perioperative period. | Other: blank<br>* Patients under CEA without taking melatonin or placebo<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Melatonin effects on patients under CEA assessed by the concentration of SOD | Melatonin effects on patients under CEA are detected by the concentration of SOD by ELISA kit. | 3 months | 
| Melatonin effects on patients under CEA assessed by the concentration of MDA | Melatonin effects on patients under CEA are detected by the concentration of MDA by ELISA kit. | 3 months | 
| Melatonin effects on patients under CEA assessed by the concentration of S100b | Melatonin effects on patients under CEA are detected by the concentration of S100b by ELISA kit. | 3 months | 
| Melatonin effects on patients under CEA assessed by the concentration of eNOS | Melatonin effects on patients under CEA are detected by the concentration of eNOS by ELISA kit. | 3 months | 
| Melatonin effects on patients under CEA assessed by the concentration of Nrf-2 | Melatonin effects on patients under CEA are detected by the concentration of Nrf-2 by ELISA kit. | 3 months | 
| Melatonin effects on patients under CEA assessed by the concentration of IL-6 | Melatonin effects on patients under CEA are detected by the concentration of IL-6 by ELISA kit. | 3 months | 
| Melatonin effects on patients under CEA assessed by the concentration of NF-κB p65 | Melatonin effects on patients under CEA are detected by the concentration of NF-κB p65 by ELISA kit. | 3 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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carotid stenosis, melatonin, vascular injury, ischemia reperfusion