Relationship of circulating c5a and complement factor h levels with disease control in pregnant women with asthma

A. Bohács, A. Bikov, I. Ivancsó, I. Czaller, R. Böcskei, V. Müller, Jr. Rigó J., G. Losonczy, L. Tamási

Research output: Contribution to journalArticlepeer-review

Abstract

BACKGROUND: Asthma often complicates pregnancy and represents a risk of serious pregnancy complications. The complement system contributes to asthma pathogenesis and is up-regulated in healthy gestation as well. The anaphylatoxin C5a has a major pro-inflammatory role, and the complement factor H is a main soluble regulator protein both in asthma and during pregnancy; however, peripheral levels of these complement factors and their relationship to disease control have not yet been evaluated in pregnant subjects with asthma. METHODS: The present study aimed to investigate circulating C5a and complement factor H levels in asthma (non-pregnant subjects with asthma; n = 19) and in pregnancy with asthma (pregnant subjects with asthma; n = 22), compared with healthy non-pregnant (n = 21) and healthy pregnant women (n = 13) and to test their relationship to clinical parameters of asthma (lung function, airway inflammation, and symptoms). RESULTS: Circulating C5a levels were higher in the pregnant asthma subject group compared with the healthy non-pregnant, healthy pregnant, and non-pregnant asthma groups: median 2.629 (interquartile range [IQR] 2.257–3.052) ng/mL versus 1.84 (IQR 1.576 –2.563), 1.783 (IQR 0.6064 –2.786), and 2.024 (IQR 1.232–2.615) ng/mL, respectively (P =. 02 in all cases). C5a correlated negatively with FEV1 (r = -0.44, P =. 039) and FVC values (r = -0.64, P =. 001) in the pregnant asthma group and positively with fraction of exhaled nitric oxide levels in the nonpregnant asthma group (n = 12, r - 0.78, P =. 004). Complement factor H levels were elevated in both the healthy pregnant and pregnant asthma subject groups compared with the healthy non-pregnant group (median 1,082 [IQR 734.9–1,224] and 910.7 [IQR 614.5–1076] µg/mL vs 559.7 [IQR 388.7– 783.1]µg/mL, P=.002 and P=.004, respectively) but not in the pregnant asthma group compared with the non-pregnant asthma group (median 687.4 [IQR 441.6–947.6] µg/mL, P =. 10). CONCLUSIONS: Asthma during pregnancy increases the circulating level of pro-inflammatory C5a, which is accompanied by impaired lung function and partly counteracted by the gestation-specific elevation of regulatory complement factor H level (detected in pregnancy both in healthy and subjects with asthma). © 2016 Daedalus Enterprises.
Original languageEnglish
Pages (from-to)502-509
Number of pages8
JournalRespiratory Care
Volume61
Issue number4
Early online date25 Mar 2016
DOIs
Publication statusPublished - Apr 2016

Keywords

  • Asthma
  • Biomarker
  • C5a
  • Complement
  • Complement factor H
  • Pregnancy
  • biological marker
  • complement component C5a
  • complement factor H
  • nitric oxide
  • regulator protein
  • complement factor H, human
  • adult
  • Article
  • asthma
  • clinical article
  • clinical evaluation
  • concurrent infection
  • cross-sectional study
  • disease control
  • disease severity
  • female
  • gestation period
  • human
  • inflammation
  • lung function
  • pathogenesis
  • pregnancy complication
  • quantitative analysis
  • respiratory tract inflammation
  • risk factor
  • blood
  • case control study
  • forced expiratory volume
  • lung
  • metabolism
  • pathophysiology
  • physiology
  • pregnancy
  • vital capacity
  • Adult
  • Case-Control Studies
  • Complement C5a
  • Complement Factor H
  • Female
  • Forced Expiratory Volume
  • Humans
  • Inflammation
  • Lung
  • Pregnancy Complications
  • Vital Capacity

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