PMID- 9214425 OWN - NLM STAT- MEDLINE DCOM- 19970729 LR - 20231213 IS - 0004-3591 (Print) IS - 0004-3591 (Linking) VI - 40 IP - 7 DP - 1997 Jul TI - Usefulness of procalcitonin for differentiation between activity of systemic autoimmune disease (systemic lupus erythematosus/systemic antineutrophil cytoplasmic antibody-associated vasculitis) and invasive bacterial infection. PG - 1250-6 AB - OBJECTIVE: To investigate whether the determination of serum procalcitonin (PCT) in systemic autoimmune disease will help to discriminate invasive infection from highly active underlying disease. METHODS: Three hundred ninety-seven serum samples, from 18 patients with systemic lupus erythematosus (SLE) and 35 patients with systemic antineutrophil cytoplasmic antibody-associated vasculitis (AAV), were analyzed. Clinical disease activity was assessed by the Systemic Lupus Activity Measure in SLE patients and by the Birmingham Vasculitis Activity Score in AAV patients. Procalcitonin concentrations were determined in parallel with concentrations of neopterin, interleukin-6 (IL-6), and C-reactive protein (CRP). Additionally, serum creatinine values were obtained. RESULTS: In 321 of the 324 samples from the 42 patients with autoimmune disease but without systemic infection, serum PCT levels were within the normal range (i.e., <0.5 ng/ml), whereas the values for neopterin, IL-6, and CRP were elevated in patients with active underlying disease. All 16 systemic infections occurred in 11 patients with AAV, and were associated with PCT levels that were markedly elevated, to a mean +/- SD of 1.93 +/- 1.19 ng/ml. No correlation between the degree of renal impairment and PCT concentrations was seen. CONCLUSION: PCT may serve as a useful marker for the detection of systemic bacterial infection in patients with systemic autoimmune disease. FAU - Eberhard, O K AU - Eberhard OK AD - Medizinische Hochschule Hannover, Germany. FAU - Haubitz, M AU - Haubitz M FAU - Brunkhorst, F M AU - Brunkhorst FM FAU - Kliem, V AU - Kliem V FAU - Koch, K M AU - Koch KM FAU - Brunkhorst, R AU - Brunkhorst R LA - eng PT - Journal Article PL - United States TA - Arthritis Rheum JT - Arthritis and rheumatism JID - 0370605 RN - 0 (Antibodies, Antineutrophil Cytoplasmic) RN - 0 (Biomarkers) RN - 0 (CALCA protein, human) RN - 0 (Glycoproteins) RN - 0 (Interleukin-6) RN - 0 (Protein Precursors) RN - 0 (Biopterins) RN - 670-65-5 (Neopterin) RN - 9007-12-9 (Calcitonin) RN - 9007-41-4 (C-Reactive Protein) RN - AYI8EX34EU (Creatinine) RN - JHB2QIZ69Z (Calcitonin Gene-Related Peptide) SB - IM CIN - Arthritis Rheum. 1998 Mar;41(3):566-7; author reply 568. PMID: 9506590 CIN - Arthritis Rheum. 1998 Mar;41(3):567-8. PMID: 9506591 MH - Antibodies, Antineutrophil Cytoplasmic/*analysis MH - Autoimmune Diseases/*diagnosis MH - Bacterial Infections/*diagnosis MH - Biomarkers/*blood MH - Biopterins/analogs & derivatives/blood MH - C-Reactive Protein/analysis MH - Calcitonin/*blood MH - Calcitonin Gene-Related Peptide MH - Creatinine/blood MH - Diagnosis, Differential MH - Glycoproteins/*blood MH - Granulomatosis with Polyangiitis/*diagnosis MH - Humans MH - Interleukin-6/blood MH - Lupus Erythematosus, Systemic/*diagnosis MH - Neopterin MH - Protein Precursors/*blood MH - Vasculitis/*diagnosis EDAT- 1997/07/01 00:00 MHDA- 1997/07/01 00:01 CRDT- 1997/07/01 00:00 PHST- 1997/07/01 00:00 [pubmed] PHST- 1997/07/01 00:01 [medline] PHST- 1997/07/01 00:00 [entrez] AID - 10.1002/1529-0131(199707)40:7<1250::AID-ART9>3.0.CO;2-A [doi] PST - ppublish SO - Arthritis Rheum. 1997 Jul;40(7):1250-6. doi: 10.1002/1529-0131(199707)40:7<1250::AID-ART9>3.0.CO;2-A.