胎盘细胞凋亡与胎儿生长受限关系的研究

目的　探讨胎盘细胞调亡与胎儿生长受限 (FGR)发生的关系。方法　应用透射电镜和DNA缺口末端标记法检测 18例FGR患者 (FGR组 )及 14例正常妊娠妇女 (正常妊娠组 )的胎盘细胞凋亡情况。同时观察两组的胎盘重量及新生儿平均出生体重。结果　FGR组胎盘凋亡细胞核比率为12 1‰ ,电镜下凋亡细胞核呈明显致密状 ,染色质结块 ,胎盘平均重量为 (2 3 6± 2 4)g ,新生儿平均出生体重为 (2 0 71± 42 8)g;正常妊娠组胎盘凋亡细胞核比率为 7 3‰ ,胎盘平均重量为 (3 5 4± 63 )g ,新生儿平均出生体重为 (3 411± 5 88)g。FGR组胎盘凋亡细胞核比率明显高于正常妊娠组 (P <0 0 5 )。结论　胎盘细胞凋亡增加与FGR的发生有关

Role of placental apoptosis in fetal growth restriction

OBJECTIVE: To determine the relationship of placental cellular apoptosis and pathophysiology of fetal growth restriction (FGR). METHODS: Placental samples were obtained from 18 pregnancies complicated by FGR and 14 normal pregnancies. Terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end labeling (TUNEL) and transmission electron microscopy were used to confirm the occurrence of apoptosis. RESULTS: In FGR group the placental apoptosis rate was (n = 18) 12.1 per thousand, the average placental weight was (236 +/- 24) g, the average birth weight was (2,071 +/- 428) g; In normal group (n = 14), the placental apoptosis rate was 7.3 per thousand, the average placental weight was (354 +/- 63) g, the average birth weight was (3,411 +/- 588) g (P < 0.05). The incidence of apoptosis was significantly higher in placental samples from pregnancies with FGR compared with normal placental samples (P < 0.05). Under transmission election microscopy, apoptosis was obviously compact and the chromatins were formed as mass. CONCLUSION: These results suggest that apoptosis may play a role in the pathophysiologic mechanisms of FGR.