title: Evaluation of C-reactive protein, interleukin-6, and procalcitonin levels in allogeneic hematopoietic stem cell recipients.
abstract: BACKGROUND
  Prompt detection of transplant-related complications (TRC) as infections, acute graft-versus-host disease (aGVHD), microangiopathic hemolytic anemia, or veno-occlusive disease following allogeneic hematopoietic stem cell transplantation (HSCT) is essential.
  
  
  METHODS
  We conducted a prospective trial on clinical significance of C-reactive protein (CRP), interleukin-6 (IL-6) and procalcitonin (PCT) serum levels in TRC. A total of 350 stem cell recipients were admitted. CRP, IL-6 and PCT were analyzed prior to conditioning and weekly until 8 wk after HSCT. TRC were recorded weekly throughout the study.
  
  
  RESULTS
  CRP (4.4 mg/dL vs. 12.8 mg/dL; P < 0.001), IL-6 (93 ng/mL vs. 1.138 ng/mL; P < 0.001) and PCT (0.8 ng/dL vs. 5.7 ng/dL; P < 0.001) were increased in infectious complications. Only PCT differentiated between infection and other TRC. Exclusive aGVHD did not increase CRP (4.4 mg/dL vs. 5.7 mg/dL; n.s.), IL-6 (93 ng/mL vs. 153 ng/mL; n.s.) and PCT (0.8 ng/dL vs. 0.8 ng/dL; n.s.). CRP (6.1 mg/dL vs. 3.1 mg/dL; P < 0.001) and IL-6 (295 ng/mL vs. 122 ng/mL; P = 0.001) were decreased during steroid therapy, but not PCT (2.3 ng/dL vs. 2.0 ng/dL; n.s.).
  
  
  CONCLUSIONS
  Our study confirmed CRP, IL-6 and PCT serum levels as helpful markers for TRC. PCT can differentiate infection from GVHD despite steroid therapy. Further trials are needed focusing on the identification of patients who benefit from early risk stratification.
authors.affiliation: Abteilung fuer Haematologie und Internistische Onkologie, Klinikum der Universitaet Regensburg, Regensburg, Germany. markus.pihusch@t-online.de
authors.forename: Markus
authors.initials: M
authors.lastname: Pihusch
authors.forename: Rudolf
authors.initials: R
authors.lastname: Pihusch
authors.forename: Peter
authors.initials: P
authors.lastname: Fraunberger
authors.forename: Verena
authors.initials: V
authors.lastname: Pihusch
authors.forename: Reinhard
authors.initials: R
authors.lastname: Andreesen
authors.forename: Hans-Jochem
authors.initials: HJ
authors.lastname: Kolb
authors.forename: Ernst
authors.initials: E
authors.lastname: Holler
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002097:C-Reactive Protein / Q000378:metabolism*; D002116:Calcitonin / Q000378:metabolism*; D015740:Calcitonin Gene-Related Peptide; D005260:Female; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects; D006801:Humans; D015850:Interleukin-6 / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D011498:Protein Precursors / Q000378:metabolism*; D014184:Transplantation, Homologous
chemical_list: C000606589:CALCA protein, human; D015850:Interleukin-6; D011498:Protein Precursors; D002116:Calcitonin; D002097:C-Reactive Protein; D015740:Calcitonin Gene-Related Peptide