A role for mannose-binding lectin, a component of the innate immune system in pre-eclampsia.
OBJECTIVE
Mannose-binding lectin (MBL) is a pattern-recognition receptor that activates complement and modulates inflammation. Homozygosity for the most common allele of the MBL2 gene that is associated with high MBL serum concentrations is more prevalent among patients with pre-eclampsia. The objective of this study was to determine maternal plasma MBL concentrations in normal pregnant women and patients with pre-eclampsia.


METHODS
This cross-sectional study included normal pregnant women (n = 187) and patients with pre-eclampsia (n = 99). Maternal plasma MBL concentrations were determined by ELISA.


RESULTS
Women with pre-eclampsia had a higher median maternal plasma MBL concentration than normal pregnant women. MBL concentration distribution curves were three-modal, the subintervals in normal pregnancy were low (< 143.7), intermediate (143.7-1898.9) and high (> 1898.9 ng/mL). The proportion of normal pregnant women was larger in the low subinterval, while the proportion of patients with preeclampsia was larger in the high subinterval (P = 0.02). Normal pregnant women in the high subinterval had a larger rate of placental underperfusion than those in the low and intermediate subintervals (P = 0.02).


CONCLUSIONS
The median maternal plasma MBL concentration is elevated in patients with pre-eclampsia and a larger proportion of these patients are in the high subinterval than normal pregnant women, suggesting that this component of the innate immune system is involved in the mechanisms of disease in pre-eclampsia.
Than
Nandor Gabor
NG
Perinatology Research Branch, NICHD/NIH/DHHS, Wayne State University/Hutzel Women's Hospital, 3990 John R, Box 4, Detroit, MI 48201, USA. nthan@med.wayne.edu
Romero
Roberto
R
Erez
Offer
O
Kusanovic
Juan Pedro
JP
Tarca
Adi L
AL
Edwin
Samuel S
SS
Kim
Jung-Sun
JS
Hassan
Sonia S
SS
Espinoza
Jimmy
J
Mittal
Pooja
P
Mazaki-Tovi
Shali
S
Friel
Lara
L
Gotsch
Francesca
F
Vaisbuch
Edi
E
Camacho
Natalia
N
Papp
Zoltan
Z
D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D007113:Immunity, Innate; D037601:Mannose-Binding Lectin / Q000097:blood / Q000235:genetics / Q000276:immunology*; D011225:Pre-Eclampsia / Q000097:blood / Q000235:genetics / Q000276:immunology*; D011247:Pregnancy
C445619:MBL2 protein, human; D037601:Mannose-Binding Lectin