[Expression of intercellular adhesion molecule-1 (ICAM-1) on the surface of peripheral blood lymphocytes of pregnant women with pregnancy-induced hypertension].
OBJECTIVE
Intercellular adhesion molecule-1 (ICAM-1, CD54) is involved in process of leukocytes adhesion to endothelium as well as in their migration to surrounding tissues. There is much evidence that pregnancy-induced hypertension (PIH) presents a state of endothelial destruction mediated partially by increased ICAM-1 expression on endothelial cells and neutrofils.


METHODS
The aim of this study was to evaluate the expression of ICAM-1 (CD54) molecule on the peripheral blood lymphocytes of pregnant women with PIH studied "in vitro".


METHODS
Preeclampsia (PE) and transient hypertension (TH) were defined according to USA National Health Institute criteria. The study group consisted of 16 women with preeclampsia (PE), 12 women with transient hypertension (TH) and 9 women with physiological pregnancy. The group of 8 nonpregnant women served as controls. Exclusion criteria were: uterine contractions, infection and steroid therapy before blood sampling. Peripheral blood was obtained by venipuncture. Lymphocytes were isolated and cultured by using standard procedures. Mitogenic doses of phytohaemaglutynin (PHA) were added to each culture. Immunofluorescent marking techniques with anty-CD54 one-step monoclonal antibodies were performed. Analysis was made with FACSCalibur flow-cytometer with 488 nm argon laser using CellQuest programme. The results were described as the percentage of CD54+ lymphocytes and MFI index corresponding density of CD54 molecules on the lymphocyte surface. Statistical analysis was performed using t-Student and U-Mann-Whitney tests. The work was sponsored by KBN 4 P05E 118,15 grant.


RESULTS
The percentage of CD54+ lymphocytes in physiological pregnancy compared to nonpregnant women did not differ significantly (56.9 +/- 20.8% vs. 57.2 +/- 14.0%, p = 0.97). The MFI value was increased in pregnant women but in comparison with nonpregnant women did not reach statistical significance (34.7 +/- 35.7 vs. 17.8 +/- 4.3, p = 0.20). The percentage of CD54+ lymphocytes in TH group compared to normal pregnant women did not differ significantly (52.2 +/- 18.6% vs. 56.9 +/- 20.8%, p = 0.58) but MFI value was significantly increased (100.6 +/- 81.5 vs. 34.7 +/- 35.7). In PE group compared to normal pregnant women the percentage of CD54+ lymphocytes as well as MFI value were significantly increased (CD54+: 70.8 +/- 12.9% vs. 56.9 +/- 20.8%, p < 0.05; MFI: 170.8 +/- 91.7 vs. 34.7 +/- 35.7, p < 0.0005).


CONCLUSIONS
1/expression of ICAM-1 molecule on peripheral blood lymphocytes studied "in vitro" during normal pregnancy is not different in comparison to the nonpregnant state, but 2/ in pregnancy complicated with PIH is significantly increased, especially in PE, 3/described changes are a sign of the lymphocyte activation and may be responsible for endothelial destruction observed in PIH.
Katedry Połoznictwa i Ginekologii WAM, Kliniki Chirurgii Ginekologicznej Instytutu CZMP w Łodzi.
Jacek Radosław
JR
Wilczyński
Małgorzata
M
Banasik
Ewa
E
Głowacka
Henryk
H
Tchórzewski
Andrzej
A
Malinowski
Marian
M
Szpakowski
Artur
A
Wieczorek
Marek
M
Nowak
Artur
A
Szpakowski
Krzysztof
K
Zeman
Jan
J
Wilczyński
Lidia
L
Biesiada
Bogumił
B
Jaczewski
D000328:Adult; D016022:Case-Control Studies; D002448:Cell Adhesion; D004730:Endothelium, Vascular; D005260:Female; D006801:Humans; D006973:Hypertension / Q000097:blood* / Q000503:physiopathology; D066298:In Vitro Techniques; D018799:Intercellular Adhesion Molecule-1 / Q000097:blood*; D008214:Lymphocytes / Q000378:metabolism*; D011225:Pre-Eclampsia / Q000097:blood* / Q000503:physiopathology; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000097:blood* / Q000503:physiopathology; D012307:Risk Factors
D018799:Intercellular Adhesion Molecule-1