Objective: Autophagy is an inducible intracellular process acting under stressor conditions, such as infections, inflammation and hypoxia. The aim of the present study was to analyze autophagy expression in preterm delivered human placenta.
Methods: Autophagy marker LC3 was analyzed in 25 consecutive human placentas delivered before 34 weeks of gestation, analyzed by immunohistochemistry, immunofluorescence and quantitative real-time PCR, according to the histologic classification of preterm delivery (PTD) (cases with or without placental inflammatory lesions).
Results: LC3 expression was observed both in cases with and without inflammatory lesions. In cases with histological inflammation, strong immunoreactivity for LC3 autophagic marker was observed in the inflammatory cell infiltration composed by neutrophils. In all PTD cases, trophoblastic cells in chorion laeve express LC3, with variable staining intensity: a significant reduction of LC3 expression was observed in chorion laeve of PTD with histological inflammation compared to PTD without inflammatory lesions. Moreover, the decrement of LC3 staining was observed to be associated to the increasing severity of the histological signs of fetal inflammatory response.
Conclusions: Our data show that the expression of LC3 varies depending on different histological features, indicating an interesting and possibly clinically relevant relation between autophagy expression levels and the inflammatory status. 相似文献
Background: Increasing admissions to neonatal intensive care units (NICUs) demand early discharge from the units. Our hospital aims to early discharge patients who meet the following requirements: they are able to regulate body temperature; neither apnea nor bradycardia is observed; and bodyweight increases with lactation. We studied the real state of this strategy. Methods: We looked at postmenstrual age, bodyweight, complication at the time of discharge and the readmission rate in 609 patients with gestational age of less than 34 weeks, who were discharged from our NICU between January 2000 and March 2008. Results: The postmenstrual age and bodyweight at discharge decreased with the increase of gestational age. This tendency was stronger in cases with gestational age of less than 26 weeks. A comparison was made between two patient groups with a gestational age of less than 26 weeks and with the age of 26 weeks or longer. Many patients with a gestational age of less than 26 weeks suffered frequently from complications and were on home oxygen therapy. The readmission rates within 3 months and 1 year of NICU discharge were 10.4% and 26.9% in patients with gestational age between 22 and 25 weeks, respectively, while those rates were 2.8% and 7.4% in patients with gestational weeks of 26 to 34, respectively. Conclusion: The postmenstrual age and bodyweight at NICU discharge decreased in inverse proportion to gestational age, especially less than 26 weeks. Our requirements for early discharge were verified by the readmission rate in this investigation. 相似文献
目的研究新生鼠常压窒息后脑组织内神经元凋亡与Omi/HtrA2表达变化及丹参干预的影响。方法选用新生大鼠常压窒息模型,7日龄新生SD大鼠随机分为对照组、窒息组和丹参干预组,于造模后不同时间点(6、12、24、48、72h)取脑组织行石蜡切片,TUNEL(Terminal dexynucleotidyl transferase-mediated dUTP nick end labeling)(末端脱氧核苷酸转移酶介导的dUTP缺口末端标记测定法)法检测神经细胞凋亡数量,免疫组织化学方法检测Omi/HtrA2蛋白表达。结果窒息组Omi/HtrA2的表达和神经细胞凋亡数量在各时间点均高于对照组(P均0.05),窒息组Omi/HtrA2的表达在造模后12h达峰(IOD:10.98±1.34),而神经元凋亡数量在24h达峰(12.1±2.66)。与窒息组比较,丹参干预组各时间点神经细胞凋亡数量和Omi/HtrA2表达均显著下降,其差异有统计学意义(P均0.05),但均未恢复至对照组水平(P0.05)。结论常压窒息可能通过上调Omi/HtrA2表达而诱导神经元凋亡,丹参可通过抑制脑组织内Omi/HtrA2表达而减少神经元凋亡数量,从而对窒息脑损伤起到保护作用。 相似文献
目的探讨及早诊治新生儿RhD溶血病(RhD-HDN)换血术后合并毛细血管渗漏综合征(CLS)的意义。方法收集2名疑似RhD-HDN换血术后合并毛细血管渗漏综合征男性患儿(患儿1、2)的病历资料,检测母亲及患儿的ABO、Rh(D)血型及HDN相关试验,比较患儿换血的详细过程、换血前后的血红蛋白(Hb)、总胆红素(TBIL)值,换血后白蛋白(ALB)及活化部分凝血活酶时间(APTT)、体重变化值。评估RhD-HDN及CLS的诊断及治疗方法。结果患儿1、2母亲血型均为A Rh(-),患儿血型均为A RhD(+),均诊断为RhD-HDN,患儿1、2分别于出生后4 h及产时出现黄疸,遂均做换血治疗。患儿1:换血2次,第1次换血157 mL/kg,A型RhD(-)悬浮红细胞470 mL,同型血浆240 mL,换血时间3.5 h,第2次换血换血种类同第1次,悬浮红细胞462 ml,血浆231 ml,换血时间3 h 20 min。两次换血前后Hb(g/L)为113 vs 146(第1次)、106 vs 146(第2次),TBIL(μmol/L)为331.1 vs 245.1(第1次)、351.5 vs 258.7(第2次);患儿2换血1次,输入A型RhD(-)悬浮红细胞340 mL,AB型RhD(-)血浆180 mL,换血时间3 h。换血前后Hb(g/L)为77 vs 156,TBIL(μmol/L)为219.8 vs 175.1。2名患儿均在换血后出现CLS症状,患儿1诊断为RhD-HDN,新生儿贫血,CLS;患儿2诊断为RhD-HDN,新生儿贫血,类白血病反应,胎粪吸入综合征(MAS)及CLS;经针对原发病、限液、抗感染、利尿、小剂量糖皮质激素、抗微血栓等综合治疗后2名患儿痊愈出院。结论注重孕(妇)期特殊血型的检测、对是特殊血型且发生过抗原暴露的孕妇的抗体效价做动态监测和必要治疗,有助于其娩出的新生儿RhD-HDN的及时诊和预后,减少新生儿换血后发生CLS。 相似文献