title: Complement split product C4d deposition in placenta in systemic lupus erythematosus and pregnancy-induced hypertension.
abstract: Systemic lupus erythematosus (SLE) and pregnancy-induced hypertension (PIH) are related to premature delivery and intrauterine growth restriction (IUGR), and share histological findings of the placenta. Association with complement dysregulation has been reported in pregnancy for both disorders. The purpose of this study was to investigate the utility of C4d immunohistochemistry for placentas with SLE- and PIH-associated pregnancy. C4d staining was performed on paraffin-embedded tissue of placentas from 26 patients with SLE, 26 with PIH, and 25 control cases. We used the H-score with a range of 0-300 for the evaluation of C4d immunoreactivity. Placentas of SLE and PIH cases showed a higher H-score than control cases (average, SLE, 38.3 (P < 0.05); PIH, 17.8; control, 1.68), with linear staining on the membrane of syncytiotrophoblast. C4d-high groups comprised 50% (12/26) of SLE and 35% (9/26) of PIH cases, with H-scores ranging 14-270 and 15-170. C4d-high groups were significantly associated with low-placental weights and low birth weight in both SLE and PIH (P < 0.05), and lower gestational age (P < 0.05) in PIH cases. These results suggest that C4d might be utilized as a biomarker evaluating the subsequent risk for IUGR and disease control during the gestation period in these patients.
authors.affiliation: Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan. minami@kuhp.kyoto-u.ac.jp
authors.forename: Sachiko
authors.initials: S
authors.lastname: Minamiguchi
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Mikami
authors.forename: Naoki
authors.initials: N
authors.lastname: Nakajima
authors.forename: Adeeb
authors.initials: A
authors.lastname: Salah
authors.forename: Eiji
authors.initials: E
authors.lastname: Kondoh
authors.forename: Keiji
authors.initials: K
authors.lastname: Tatsumi
authors.forename: Ikuo
authors.initials: I
authors.lastname: Konishi
authors.forename: Hironori
authors.initials: H
authors.lastname: Haga
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000378:metabolism; D003181:Complement C4 / Q000378:metabolism*; D005260:Female; D005317:Fetal Growth Retardation / Q000175:diagnosis / Q000209:etiology / Q000378:metabolism; D005865:Gestational Age; D006801:Humans; D046110:Hypertension, Pregnancy-Induced / Q000378:metabolism* / Q000473:pathology; D007150:Immunohistochemistry / Q000379:methods; D008180:Lupus Erythematosus, Systemic / Q000378:metabolism* / Q000473:pathology; D011247:Pregnancy; D012307:Risk Factors; D014327:Trophoblasts / Q000378:metabolism* / Q000473:pathology; D055815:Young Adult
chemical_list: D015415:Biomarkers; D003181:Complement C4