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MD2, Cystatin C and DNA Methylation Tags as Serum Biomarkers for POCD.

NCT03610191 · Status: UNKNOWN · Type: OBSERVATIONAL · Enrollment: 250

Last updated 2020-07-07

No results posted yet for this study

Summary

Postoperative cognitive dysfunction (POCD) is a severe complication after surgery. Currently, a complicated battery of neuropsychological tests both before and after surgery with other characteristics-matched population as control are needed for the diagnosis of POCD. This diagnosis is also delayed, which could not be used to screen for high risk patients who may need intervention beforehand. The current trial targeted a surgical population of elderly patients undergoing cardiac surgery under cardiopulmonary bypass (CPB), which is a population of the highest incidence of POCD, to screen for possible predictive or diagnostic biomarkers in the serum for POCD. Myeloid differentiation factor 2 (MD2), also known as lymphocyte antigen 96, is a protein involved in biding lipopolysaccharide with Toll like receptor-4 (TLR4). Recently the investigators have found that increased MD2 expression in the hippocampus of the mice after surgery stimuli. On the other hand, the investigators have reported that cystatin C (CysC) as an endogenous neuroprotective factor for stroke. It may also be involved in endogenous neural protection against POCD. This trial is to investigate whether serum MD2, CysC can be used for prediction and diagnosis of POCD in surgical population. Serum based DNA methylation biomarkers will also be tested for prediction or diagnosis of POCD development. Also in our orevious research, SNPs cites at rs6739405、rs12467815、rs12472215、rs11126727、rs11126731、rs993607 were revealed as possible susceptibility variations for POCD (diagnosed with MMSE only, NCT02084030) in patients undergoing CPB. This study will also test the SNP variations in study populations to varify if one or conbination of morethan one of these varuations can be a risk factor for POCD when diagonosed with NPT.

Conditions

  • Postoperative Cognitive Dysfunction

Interventions

DIAGNOSTIC_TEST

Serum biomarker tests

Blood was collected at preoperatively, immediately after operation and 24 h after operation in patients from the surgical group but not volunteers. Serum MD2, CysC, DNA methylation marker and SNP mutation sites on CTNNA2 gene were test.

BEHAVIORAL

Neuropsychological battery tests

both surgical patients and volunteers will accept three times of NPB tests. For surgical patients the tested time point are preoperative, one day before discharge and 3 months after surgery. For volunteers the tested time interval would be similar to that of surgical patients.

PROCEDURE

Cardiac surgery

patients scheduled for cardiac surgery will accept the surgical procedure.

Sponsors & Collaborators

  • Xijing Hospital

    lead OTHER

Principal Investigators

  • Lize Xiong, M.D., Ph.D. · Xijing Hospital, the Fourth Military Medical University

Eligibility

Min Age
18 Years
Max Age
108 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2018-11-20
Primary Completion
2021-09-01
Completion
2021-12-01

Countries

  • China

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03610191 on ClinicalTrials.gov