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Clinical Chemistry and Laboratory Medicine (CCLM)

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Volume 44, Issue 1 (Jan 2006)

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Plasma cell-free DNA as an indicator of severity of injury in burn patients

Tor W. Chiu
  • Plastic and Reconstructive Surgery, Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR
/ Richard Young
  • Plastic Surgery, Chelsea and Westminster Hospital, London, UK
/ Lisa Y.S. Chan
  • Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR
/ Andrew Burd
  • Plastic and Reconstructive Surgery, Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR
/ Dennis Y.M. Lo
  • Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR
Published Online: 2005-12-23 | DOI: https://doi.org/10.1515/CCLM.2006.003

Abstract

Background: Raised levels of plasma cell-free DNA have been detected in various patient groups, including trauma patients. We hypothesized that plasma DNA is increased in burn patients and may represent an objective indicator of burn severity and have predictive as well as prognostic significance.

Methods: This was a prospective clinical study with full ethical approval. With informed consent, blood samples were collected from 28 burn patients within 24h of injury and from 12 control subjects. Plasma cell-free DNA was measured by real-time quantitative polymerase chain reaction (PCR) assay for the β-globin gene. Descriptive analysis, non-parametric data comparison tests (Mann-Whitney) and correlation tests (Spearman rank) were performed on the data.

Results: Samples were taken at a mean time of 5.7h after injury from 13 patients with flame/flash burns and 15 patients with scalds. Median plasma DNA levels in the control, scald and flame/flash burn patient groups were 287, 648 and 2685 kilogenome-equivalents/L, respectively. Plasma DNA levels correlated with the length of hospital stay, but not with admission to the intensive care unit (ICU) nor the length of ICU stay. DNA levels correlated with the burn surface area (Spearman rank r=0.54, p=0.04) and the number of operations needed (Spearman rank r=0.55, p=0.03) for scalds, but not for flame/flash burns.

Conclusions: Plasma DNA is increased after burn injury and is significantly correlated with some outcome measures, including the length of hospital stay. DNA levels are higher in flame/flash patients than in scald patients; the difference may provide an objective indication of burn depth and inhalation injury.

Keywords: burns; cell-free DNA; prognostic indicator; severity

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About the article

Corresponding author. Tor W. Chiu, Plastic and Reconstructive Surgery, Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR Phone: +852-26322639, Fax: +852-26377974,


Received: 2005-04-27

Accepted: 2005-07-21

Published Online: 2005-12-23

Published in Print: 2006-01-01



Citation Information: Clinical Chemistry and Laboratory Medicine (CCLM), ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: https://doi.org/10.1515/CCLM.2006.003. Export Citation

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