Endothelial Dysfunction and Selenium Status in Children With Acute Systemic Inflammatory Response

Endothelial Dysfunction and Selenium Status in Children With Acute Systemic Inflammatory

The overall hypotheses of this project is that severe sepsis is associated with endothelial dysfunction in pediatric patients and that selenium deficiency is associated with changes in biological markers of endothelial dysfunction and that these changes, in turn, are associated with worse clinical prognosis.

Study Overview

• Status: Completed
• Conditions: Endothelial Dysfunction; Selenium Deficiency; Regulation of Acute Inflammatory Response

Detailed Description

Background: Oxidative stress occurs during shock as a result of granulocytes and endothelial cell activation. Higher intensity of endothelial activation is associated with unfavorable outcomes. Selenium is an essential trace element that plays a key role in the antioxidant defenses and whose plasma concentrations have been low in critically ill patients. There are no clinical studies, especially in pediatric patients that consider the roles of selenium and nutritional status in the modulation of endothelial adaptive response during the inflammatory response secondary to shock. The investigators hypothesize that selenium deficiency is associated with changes in biological markers of endothelial dysfunction and that these changes, in turn, are associated with worse clinical prognosis. Objectives: 1) to investigate the association between selenium (Se) status and the endothelial activation in children during acute systemic inflammatory response and 2) to investigate whether the intensity of endothelial activation can predict the clinical outcome in children with systemic inflammatory response.

Methodology: prospective, observational study in children admitted to an intensive care unit (ICU) with systemic inflammatory response. The primary outcome will be 'intensity endothelial activation' which will be defined based on biological markers (SE-selectin, soluble intercellular molecule 1 of Vascular Cell adhesion Molecule and soluble adhesion-1). The association between the state of Se (anthropometric measurements, blood levels of selenium and erythrocyte glutathione peroxidase, selenoprotein P activity) and this outcome will be investigated in a multiple logistic model considering age, gender, primary diagnosis, prognostic scores and clinical characteristics. The secondary outcome will be 'clinical prognosis' which will be defined based on 'organ dysfunction' (creatinine level, platelets level and arterial hypotension), infectious complications during the staying in ICU and death up to 28 days. In this step the explanatory variables will be the same used in the first analyse plus to 'intensity of endothelial activation'. Participants will be followed for the duration of ICU/Hospital stay, an expected average of 28 days. Particularly, biological markers of endothelial activation will be evaluated in three different times: at baseline and on days 3 and 5 ICU. Expected results: if the study hypotheses are correct, they may justify the analysis of biomarkers of endothelial activation in medical practice and in future studies assessing the benefits of selenium supplementation in critical illness.

• Study Type: Observational
• Enrollment (Actual): 114

Contacts and Locations

Study Locations

• Brazil
  • São Paulo, Brazil, 05579-000
    • Emílio Lopes Junior

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 1 month to 18 years (Child, Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

children admitted to an intensive care unit (ICU) with systemic inflammatory response.

Description

Inclusion Criteria:

• All patients admitted to an intensive care unit with systemic inflammatory response

Exclusion Criteria:

• Blood transfusion
• Chronic disease

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
association between selenium status and the endothelial activation	To investigate the association between selenium status and the endothelial activation in children during acute systemic inflammatory response.	30/06/2016 (up to 2 years)

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Endothelial activation and clinical outcome in children with SIRS	To investigate whether the intensity of endothelial activation can predict the clinical outcome in children with systemic inflammatory response	30/06/2016 (up to 2 years)

Collaborators and Investigators

• Sponsor: Federal University of São Paulo
• Investigators: Study Director: Heitor Pons Leite, professor, Federal University of São Paulo

Publications and helpful links

General Publications

• Goldstein B, Giroir B, Randolph A; International Consensus Conference on Pediatric Sepsis. International pediatric sepsis consensus conference: definitions for sepsis and organ dysfunction in pediatrics. Pediatr Crit Care Med. 2005 Jan;6(1):2-8. doi: 10.1097/01.PCC.0000149131.72248.E6.
• Dellinger RP, Levy MM, Rhodes A, Annane D, Gerlach H, Opal SM, Sevransky JE, Sprung CL, Douglas IS, Jaeschke R, Osborn TM, Nunnally ME, Townsend SR, Reinhart K, Kleinpell RM, Angus DC, Deutschman CS, Machado FR, Rubenfeld GD, Webb SA, Beale RJ, Vincent JL, Moreno R; Surviving Sepsis Campaign Guidelines Committee including the Pediatric Subgroup. Surviving sepsis campaign: international guidelines for management of severe sepsis and septic shock: 2012. Crit Care Med. 2013 Feb;41(2):580-637. doi: 10.1097/CCM.0b013e31827e83af.

Study record dates

Study Major Dates

• Study Start: January 1, 2016
• Primary Completion (Actual): June 1, 2016
• Study Completion (Actual): June 1, 2016

Study Registration Dates

• First Submitted: August 3, 2015
• First Submitted That Met QC Criteria: November 28, 2015
• First Posted (Estimate): December 2, 2015

Study Record Updates

• Last Update Posted (Estimate): June 22, 2016
• Last Update Submitted That Met QC Criteria: June 20, 2016
• Last Verified: June 1, 2016

More Information

Terms related to this study

• Other Study ID Numbers: Endothelium

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED