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Polyphenol Intake, Mediterranean Diet Adherence, and Oxidative Stress in Pregnancy (PREGPOLY)

2026年6月14日 更新者：Ana García Albarrán、University of Salamanca

Effect of Polyphenol Intake and Adherence to the Mediterranean Diet on Oxidative Stress During Pregnancy

This study is a randomized controlled clinical trial designed to evaluate the effect of a polyphenol-rich dietary intervention during pregnancy on endothelial function, oxidative stress biomarkers, and maternal and neonatal outcomes.

Pregnancy is associated with metabolic and vascular adaptations, and complications such as gestational diabetes and hypertensive disorders are linked to endothelial dysfunction and increased oxidative stress. Dietary factors, particularly adherence to the Mediterranean diet and intake of polyphenol-rich foods, may play a protective role.

Pregnant women will be randomly assigned to either an intervention group or a control group. The intervention consists of daily consumption of 10 g of natural non-alkalized cocoa and structured dietary counseling aimed at achieving at least five daily servings of fruits and vegetables, alongside general Mediterranean diet recommendations.

The intervention will last 12 weeks, from early to mid-pregnancy. Biomarkers of endothelial function and oxidative stress will be measured at different time points, along with clinical maternal outcomes (including gestational diabetes and hypertensive disorders) and neonatal outcomes.

The aim is to determine whether this dietary intervention improves endothelial function, reduces oxidative stress, and contributes to better pregnancy outcomes.

研究概览

地位

尚未招聘

条件

干预/治疗

研究类型

介入性

注册 (估计的)

60

阶段

  • 不适用

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习联系方式

研究联系人备份

  • 姓名：María Begoña Ayuda Durán, PharmD
  • 电话号码：+34 923 294 537
  • 邮箱：bego_ayuda@usal.es

学习地点

  • 西班牙
    • SALAMANCA
      • Salamanca、SALAMANCA、西班牙、37007
        • Hospital de Salamanca
        • 接触：

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

  • 成人
  • 年长者

接受健康志愿者

是的

描述

Inclusion Criteria:

  • Pregnant women aged 18 years or older.
  • Singleton pregnancy.
  • Gestational age between 8 and 11 weeks at enrollment.
  • Receiving prenatal care within the Salamanca Health Area.
  • Able to understand the study information and provide written informed consent.
  • No clinical restrictions that would contraindicate dietary modifications.

Exclusion Criteria:

  • Medical or obstetric conditions that contraindicate dietary modifications.
  • Active metabolic, renal, or hepatic disease.
  • Severe hyperemesis gravidarum or gastrointestinal disorders limiting food intake.
  • Allergy or intolerance to cocoa.
  • Habitual high cocoa or chocolate consumption (>30 g/day).
  • Multiple pregnancy.
  • Severe obstetric complications diagnosed before enrollment.
  • Inability to comply with study procedures, attend follow-up visits, or communication barriers that could interfere with participation.

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

  • 主要用途：预防
  • 分配：随机化
  • 介入模型：并行分配
  • 屏蔽：单身的

武器和干预

参与者组/臂
干预/治疗
实验性的：Intervention Group
Participants will receive a daily dietary intervention consisting of 10 g of natural non-alkalized cocoa and structured nutritional counseling aimed at achieving at least five daily servings of fruits and vegetables, in addition to general Mediterranean diet recommendations. The intervention will last 12 weeks during pregnancy.
膳食补充剂：Natural Non-Alkalized Cocoa
Structured nutritional counseling aimed at achieving at least five daily servings of fruits and vegetables and improving adherence to the Mediterranean diet.
行为的：Polyphenol-Rich Dietary Counseling
Structured nutritional counseling aimed at achieving at least five daily servings of fruits and vegetables and improving adherence to the Mediterranean diet.
有源比较器：Control Group
Participants will receive standard dietary advice based on general healthy eating and Mediterranean diet recommendations during pregnancy, without specific supplementation or structured dietary intervention.
行为的：Polyphenol-Rich Dietary Counseling
Structured nutritional counseling aimed at achieving at least five daily servings of fruits and vegetables and improving adherence to the Mediterranean diet.

研究衡量的是什么？

主要结果指标

结果测量
措施说明
大体时间
Change in serum sVCAM-1 concentration
大体时间：Baseline, 24-28 weeks, and 32-36 weeks of gestation
Change in serum soluble vascular cell adhesion molecule-1 (sVCAM-1) levels from baseline to 24-28 weeks of gestation, measured in [ng/mL].
Baseline, 24-28 weeks, and 32-36 weeks of gestation
Change in serum sFlt-1/PlGF ratio
大体时间：Baseline, 24-28 weeks of gestation, and 32-36 weeks of gestation.
Change in the soluble fms-like tyrosine kinase-1 to placental growth factor (sFlt-1/PlGF) ratio from baseline to 24-28 weeks and 32-36 weeks of gestation.
Baseline, 24-28 weeks of gestation, and 32-36 weeks of gestation.
Change in serum nitric oxide concentration
大体时间：Baseline, 24-28 weeks, and 32-36 weeks of gestation.
Change in serum nitric oxide (NO) concentration from baseline to 24-28 weeks and 32-36 weeks of gestation, measured in [pg/mL].
Baseline, 24-28 weeks, and 32-36 weeks of gestation.
Change in serum IL-6 concentration
大体时间：Baseline, 24-28 weeks, and 32-36 weeks of gestation
Change in circulating interleukin-6 levels between baseline and follow-up assessments, measured in [pg/mL].
Baseline, 24-28 weeks, and 32-36 weeks of gestation

次要结果测量

结果测量
措施说明
大体时间
Change in Mediterranean Diet Adherence Screener (MEDAS) score
大体时间：Baseline, 24-28 weeks of gestation, and 32-36 weeks of gestation.
Change in adherence to the Mediterranean diet measured using the Mediterranean Diet Adherence Screener (MEDAS). Scores range from 0 to 14, with higher scores indicating greater adherence to the Mediterranean diet.
Baseline, 24-28 weeks of gestation, and 32-36 weeks of gestation.

其他结果措施

结果测量
措施说明
大体时间
Incidence of gestational diabetes mellitus
大体时间：24-28 weeks of gestation.
Occurrence of gestational diabetes mellitus diagnosed according to standard clinical criteria and routine screening procedures during pregnancy.
24-28 weeks of gestation.
Incidence of gestational hypertension
大体时间：From enrollment until delivery.
Occurrence of gestational hypertension diagnosed according to standard clinical criteria during pregnancy.
From enrollment until delivery.
Incidence of preeclampsia
大体时间：From enrollment until delivery.
Occurrence of preeclampsia diagnosed according to standard clinical criteria during pregnancy.
From enrollment until delivery.
Gestational age at delivery
大体时间：At delivery.
Gestational age at the time of delivery measured in completed weeks of gestation.
At delivery.
Neonatal birth weight
大体时间：At delivery.
Neonatal birth weight measured in grams.
At delivery.
Apgar score at 1 minute
大体时间：At delivery.
Neonatal condition assessed using the Apgar score at 1 minute after birth. Scores range from 0 to 10, with higher scores indicating better neonatal condition.
At delivery.
Apgar score at 5 minutes
大体时间：At delivery.
Neonatal condition assessed using the Apgar score at 5 minutes after birth. Scores range from 0 to 10, with higher scores indicating better neonatal condition.
At delivery.
Apgar score at 10 minutes
大体时间：At delivery.
Neonatal condition assessed using the Apgar score at 10 minutes after birth. Scores range from 0 to 10, with higher scores indicating better neonatal condition.
At delivery.
Neonatal intensive care unit admission
大体时间：At delivery
Proportion of newborns requiring admission to the neonatal intensive care unit (NICU).
At delivery

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

University of Salamanca

调查人员

  • 首席研究员：Ana García Albarrán, RN, Midwife、University of Salamanca
  • 研究主任：Susana González Manzano, PharmD、University of Salamanca
  • 研究主任：María Begoña Ayuda Durán, PharmD、University of Salamanca

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (估计的)

2026年9月1日

初级完成 (估计的)

2027年9月1日

研究完成 (估计的)

2028年10月1日

研究注册日期

首次提交

2026年6月9日

首先提交符合 QC 标准的

2026年6月14日

首次发布 (实际的)

2026年6月18日

研究记录更新

最后更新发布 (实际的)

2026年6月18日

上次提交的符合 QC 标准的更新

2026年6月14日

最后验证

2026年6月1日

更多信息

与本研究相关的术语

关键字

其他相关的 MeSH 术语

其他研究编号

  • USAL-CT-2026-001

计划个人参与者数据 (IPD)

计划共享个人参与者数据 (IPD)？

未定

IPD 计划说明

At present, there is no finalized plan for sharing individual participant data (IPD). Due to the sensitive nature of maternal and neonatal health data and the presence of biological and clinical information, data sharing will be considered in accordance with institutional ethics requirements, participant consent, and applicable data protection regulations.

Any potential future sharing of de-identified data will be determined after study completion and in line with publication and regulatory requirements.

药物和器械信息、研究文件

研究美国 FDA 监管的药品

不

研究美国 FDA 监管的设备产品

不

此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.

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