Barrier Effect of Placenta Membrane of Pregnant Rat on Mixed Rare Earth Changle

To assess the potential health risks of mixed rare earths Changle for human embryo, whether it crosses placenta membrane or placenta barrier should be determined. In order to arrive at the aim placenta tissue was observed after contamination with optical and electron microscope to show distribution and destiny of mixed rare earth Changle in placenta tissue. Meanwhile the amount of rare earths in serum of pregnant rat, amniotic fluid and extract of embryo tissue were measured by using Inductively Coupled Plasma Mass Spectrometer (ICP MS). The rats were administered to 0 3, 2, 5 and 20 mg·kg -1 mixed rare earths Changle every day, respectively by oral from the 6th to 18th day after pregnancy. The results show that many particles are found in syncytiotrophoblast around capillaries of placental villi in contaminated groups under light microscope, and there are more particles following increased dose. It also was observed that some dense bodies with the envelope in placenta membrane and to difference extent damages the mitochondria crista within syncytiotrophoblast cytoplasm in contaminated groups under transmission electron microscope (TEM). Results of ICP MS assay indicate that the level of Ce increases with contamination dose in the serum of pregnant rats, and the level of total rare earth element remarkably rises in amniotic fluid and serum of pregnant rats for 20 mg·kg -1 group as compared with the control without change for the other groups.

Studies on Nutritional Effects of Traditional Chinese Tonics with Nutrients Fortification on Pregnant Women and Pregnant Rats

Objective: To explore the nutritional and health promoting effects of nutrient mixture (traditional Chinese tonics ＋ nutrient fortification). Methods: (1) One hundred and three primigravid women were divided randomly into the test group and the control group treated with nutrient mixture and vitamins respectively and the effects of treatment were observed. (2) Effects of nutrient mixture were also observed in pregnant rats. Results: (1) Clinical study showed the serum levels of iron, zinc, hemoglobin of the test group were allraised after treatment, and these parameters and the concentration of iron in umbilical cord blood as well as the weight of the new-born baby of the test group were higher than those of the control group (P ＜0. 05 or P＜0. 01). (2) Results of the experimental study showed that the food utilization rate, hemoglobin level, fetal growth and developing parameters of the test group were all higher than those of the control group significantly (P ＜0. 05 or P＜ 0. 01 ). Conclusion: The nutrient mixture has a good nutritional and health promoting effect on pregnancy.

Effects of intrauterine infection in different periods on the placenta and endometrial blood vessel formation of pregnant mice and the growth and development of fetal rats

Objective:To investigate the effects of intrauterine infection in different periods on the placenta and endometrial blood vessel formation of pregnant rats and the growth and development of fetal rats.Methods:According to the random number table method,32 pregnant rats were divided into the early infection group,the mid-term infection group,the late infection group and the control group,with 8 rats in each group.On the 3rd,9th and 15th day of pregnancy,lipopolysaccharide was injected intraperitoneally to construct intrauterine infection models.The pregnant rats in the control group were intraperitoneally injected with the same dose of 0.9%sodium chloride solution.On the 18th day of pregnancy,the inflammatory factors[interleukin-6(IL-6),tumor necrosis factor-(TNF-)],the blood vessel density of placenta and endometrium in the placental tissues of pregnant rats,dead fetus+absorbed fetus,the inflammatory factors IL-6,TNF-and oxidation reaction indicators[malondialdehyde(MDA)and myeloperoxidase(MPO)]in the fetal rat lung and brain tissues were detected.Results:The changing trend of IL-6 and TNF-levels in the placental tissues of pregnant rats with intrauterine infection in different periods was:the control group<the late infection group<the mid-term infection group<the early infection group,the differences were statistically significant(p<.05).The changing trend of fetal rat weight,placental weight and placental coefficient in the intrauterine infection groups in different periods was:the control group>the late infection group>the mid-term infection group>the early infection group,the differences were statistically significant(p<.05).The blood vessel density of placenta and endometrium,the mean number of fetuses,brain coefficient and lung coefficient in the late infection group were significantly increased in comparison with the early infection group and the mid-term infection group.The total number and the ratio of dead fetus+absorbed fetus,the levels of IL-6,TNF-,MDA and MPO in brain and lung tissues were significantly reduced,and the differences were statistically significant(p<.05).The blood vessel density of placenta and endometrium,brain coefficient and lung coefficient of pregnant rats in the mid-term infection group were significantly increased in comparison with the early infection group,and the differences were statistically significant(p<.05).There was no statistically significant difference in the other indicators between the two groups(p>.05).Conclusions:Intrauterine infection in different periods can inhibit placental and endometrial angiogenesis,and affect the survival rate of fetal rats and the growth and development of brain and lung.The reason may be related to the aggravation of fetal inflammatory responses and oxidative stress.The earlier the intrauterine infection occurs,the severer the adverse effects on the fetal rats will be.

Chromosomal aberrations and nucleic acids systems affected by some Egyptian medicinal plants used in treating female pregnant diabetic rats

The influences of medicinal plants Juniperus Phoenicea (Araar), Hyphaene thebaica (Doum), An-astatica hierochuntica (Kafta) and Cleome droserifolia (Sammo) as antidiabetic agents were investigated using female pregnant albino rats. Female rats were injected with 60 mg/kg b.w. alloxan to induce diabe-tes. Diabetic rats treated orally with the methanol extracts of tested plants till the 19 day of gestation. The present studies include the frequencies of chro-mosomal aberrations and nucleic acid system of liver in the female pregnant rats and their embryos. The results showed that injection of alloxan caused highly significant increase in chromosomal aberrations as well as in blood glucose levels as a result of diabetes in pregnant females. It also caused a high incidence of chromosomal deviation in embryos and decreased the liver soluble protein contents of female rats and their embryos. These effects in alloxanized animals were treated and improved by ingestion of the methanol extracts of the tested plants (Araar, Doum, Kafta and Somma) in which under their treatments, the inceased level of blood glu-cose of diabetic rats was deceased. Ingestion with the plants methanolic extracts improved and normalized the effects of diabetes in nucleic acids values of liver tissues. These were accompanied with nucleases (RNAase and DNAase) activities. The inhibited ac-tivities of both DNA ase and RNA ase of pregnant rats and their embryos were stimulated and read-justed around the normal values. Also administration of the plants methanol extracts decreased the per-centage of chromosomal aberrations in the female rats and embryos. It is concluded that there are some biochemical dynamics which might occur in the metabo-lism of glucose, nucleic acids and proteins in order to prevent or to reduce the oxidative stress of diabetes by flavonoides treatment.

Folic acid supplementation attenuates hyperhomocysteinemia-induced preeclampsia-like symptoms in rats

Folic acid participates in the metabolism of homocysteine and lowers plasma homocysteine levels directly or indirectly. To establish a hyperhomocysteinemic pregnant rat model, 2 mL of DL-homocysteine was administered daily by intraperitoneal injection at a dose of 200 mg/kg from day 10 to day 19 of gestation. Folic acid was administered by intragastric administration at a dose of 20 mg/kg during the period of preeclampsia induction. Results showed that systolic blood pressure, proteinuria/creatinine ratio, and plasma homocysteine levels in the hyperhomocysteinemic pregnant rats increased significantly, and that body weight and brain weight of rat pups significantly decreased. Folic acid supplementation markedly reversed the above-mentioned abnormal changes of hyperhomocysteinemic pregnant rats and rat pups. These findings suggest that folic acid can alleviate the symptoms of hyperhomocysteinemia- induced preeclampsia in pregnant rats without influencing brain development of rat pups.

混合稀土常乐在孕鼠和胎鼠肝中的蓄积及对肝脏钙含量的影响

目的 :观察混合稀土常乐在孕鼠和胎鼠肝中的蓄积情况以及对钙 ( Ca2 + )含量的影响。方法 :采用电感耦合等离子体质谱法和电感耦合等离子体原子发射光谱法分别检测孕鼠和胎鼠肝中镧 ( La3 + )、铈 ( Ce3 + )、镨 ( Pr3 + )、钕 ( Nd3 + )和钙含量变化。结果 :孕鼠 2 0 mg· kg-1常乐组肝中La3 + 、Ce3 + 和 Nd3 + 含量高于对照组 ( P <0 .0 5 ) ;孕鼠肝脏 Ca2 + 含量各实验组高于对照组( P<0 .0 5 )。结论 :孕鼠 2 0 mg· kg-1常乐组稀土元素在孕鼠肝中有蓄积 ,各实验组孕鼠肝脏钙含量均有变化 ;

妊娠大鼠子宫和胎盘中TGF-β1的表达及IFNγ对其表达的影响

采用半定量RT-PCR、蛋白质印迹和免疫组化等方法,对大鼠妊娠过程中子宫和胎盘转化生长因子β1(TGF-β1)的动态表达和表达定位,及体内注射超生理剂量的γ干扰素(interferen-gamma,IFNγ)后TGF-β1的表达进行检测,探讨了妊娠子宫和胎盘中TGF-β1的表达规律、定位及与IFNγ的关系.正常妊娠各个时期大鼠子宫和胎盘中均能检测到TGF-β1 mRNA和蛋白质的表达.半定量RT-PCR结果表明:妊娠早期(D1～D9)子宫TGF-β1mRNA的表达呈递增趋势,胚泡植入前(D4),子宫TGF-β1 mRNA的表达较低,胚泡植入早期(D6)TGF-β1mRNA的表达显著升高,植入后期(D9)TGF-β1 mRNA的表达达高峰,妊娠中期(D15)和妊娠晚期(D19)TGF-β1mRNA的表达逐渐降低;妊娠早(D9)、中(D15)、晚期(D19)胎盘中TGF-β1 mRNA的表达呈时效递增,D15胎盘中TGF-β1 mRNA的表达高于D9(P＜0.01),D19胎盘中TGF-β1 mRNA的表达高于D15(P＜0.01).免疫组化结果显示,妊娠早期TGF-β1主要在子宫蜕膜中表达,中晚期主要在滋养层表达.生殖道肌肉注射超生理剂量的IFNγ能下调TGF-β1的表达,且呈一定的剂量依赖关系.提示:在妊娠不同时期子宫和胎盘中TGF-β1的表达呈显著的时空动态变化,IFNγ对TGF-β1 mRNA的表达有调节作用.

妊娠大鼠子宫和胎盘IL-1β表达及IFN-γ对其表达的影响

为探讨妊娠过程中白介素 1β (IL 1β)表达的变化及干扰素 γ (IFN γ)对其表达的影响 ,以妊娠Spre qne Dawley大鼠为模型 ,采用逆转录 -聚合酶链反应的方法检测了妊娠不同时期子宫和胎盘IL 1βmRNA表达的动态变化及IFN γ对子宫和胎盘IL 1βmRNA表达的影响。实验结果表明 ,在胚泡植入子宫内膜前 ,子宫组织内IL 1βmRNA的表达较高 ,胚泡刚植入时 ,IL 1βmRNA的表达显著降低 ,之后 ,随着胚胎的发育和胎盘的增生 ,子宫组织内IL 1βmRNA的表达逐渐升高。妊娠早、中、晚期胎盘IL 1βmRNA没有显著性差异。注射超生理剂量的IFN γ后 ,植入前期、植入后期及妊娠中期和妊娠晚期IL 1βmRNA的表达均显著减少 ,胎盘IL 1βmRNA的表达在妊娠晚期出现下降。上述结果提示 ,高剂量的IFN γ对妊娠一定时期的大鼠子宫和胎盘IL

妊娠期大气细颗粒物暴露损伤孕鼠多种器官并抑制妊娠及胎儿发育

目的建立小鼠妊娠期大气细颗粒物(fine particulate matter,AD≤2.5μm,PM_(2.5))暴露模型,探讨妊娠期PM_(2.5)暴露对孕鼠主要脏器及妊娠的影响。方法孕鼠随机分为空白组、对照组、PM_(2.5)低剂量组、PM_(2.5)中剂量组和PM_(2.5)高剂量组,利用气管染毒方法分别向PM_(2.5)低、中、高剂量组注入浓度为0.2592μg/μl、1.56695μg/μl和3.456μg/μl的30μl PM_(2.5)混悬液,对照组注入相同体积PBS。孕期间断染毒七次。观察PM_(2.5)染毒对孕鼠体重增长、妊娠天数、主要脏器及对新生仔鼠数量、体重等发育情况的影响,HE染色观察孕鼠心、肝、肺、肾的病理学变化。结果 PM_(2.5)中剂量和高剂量组与对照组相比,孕鼠体重增长减缓,妊娠天数减少;孕鼠肝、肺、心和肾重量均减轻,且组织结构受损,可见炎症等病理改变;新生仔鼠数量减少,体重下降,可见无脑等畸形。结论妊娠期暴露在PM_(2.5)污染环境中可引起小鼠心、肝、肺、肾出现炎症等病理损害,进而影响小鼠妊娠,导致新生仔鼠数量减少,出现畸形、体重减轻等不良妊娠结局。

恐伤孕鼠对其仔鼠长骨早期发育影响的研究

目的:根据肾主骨生长发育理论,研究先天肾虚影响长骨早期发育的情况,论证补肾填精法的作用。方法:采用模拟地震振动、光电刺激复合应激恐吓孕鼠造成子代先天肾虚。将孕鼠分为正常、模型、补肾3组,补肾组灌服左归丸浓缩剂。动态检测出生后仔鼠20 d内平均身长、5周内股骨平均长度、Micro CT检测股骨皮质骨及松质骨微结构参数、第5周股骨钙、磷、羟脯氨酸含量。结果:模型组仔鼠平均身长、股骨平均长度显著降低(P<0.05或P<0.01);各时间点模型组皮质骨厚度、外径周长、皮质骨面积、皮质骨密度减少;股骨矿物质、基质胶原含量减少。上述指标与另两组比较差异显著(P<0.05)。结论:先天肾虚可以影响长骨早期生长发育,出现骨量减少,成骨活性降低,皮质骨发育不良。中药补肾填精治疗,可有效改善先天肾虚仔鼠长骨早期发育不良。

雄黄灌胃给药后砷在孕大鼠脏器内的分布及排泄途径研究

目的研究口服雄黄后砷在孕大鼠体内的分布和排泄途径。方法结合生殖毒性Ⅱ段试验,雌性SD大鼠交配后随机分成高、中、低(550、250、125 mg/kg)剂量组和阴性对照组(0.5%羧甲基纤维素钠)4组,妊娠第6-15日每日1次用雄黄悬浊液连续灌胃10 d,于妊娠第20日处死。每组10只,取孕大鼠各主要脏器(心、肝、脾、肺、肾、脑、子宫)和全血、胎盘、胎仔及不同给药时间点的尿液和粪便,运用电感耦合等离子体质谱法(ICP-MS)、电感耦合等离子体发射光谱法(ICP-OES)分别测定砷含量,分析砷在各脏器的分布情况以及排泄途径。结果各脏器中砷含量均显著高于阴性对照组,全血砷含量最高,并随剂量的增加而增加;与其他脏器比较,脑和胎仔组织内各剂量组的砷含量最低。给药第2日粪便中即出现大量砷,日排泄量折合成雄黄约占摄入量的69.5%～80.2%;而给药第10日排泄量上升到85.2%～96.2%;停药第4日粪便中雄黄排泄量急剧下降。尿液中排泄的砷微量,并有剂量依赖性,停药第4日排泄量仍在较高水平。结论砷在不同脏器内蓄积与给药剂量有关,其中以全血、脾、胎盘、肺内砷含量较高;口服雄黄主要经肠道排泄,而组织内蓄积的砷可能经肾脏排泄。

壬基酚对雄性仔鼠生殖毒性的研究

目的探讨孕鼠暴露壬基酚对雄性仔鼠生殖系统的影响。方法大鼠妊娠第14-19 d灌胃染毒壬基酚（20、40、80、200 mg/kg）,仔鼠90 d龄剖杀,检测与生殖功能相关各项指标。结果与阴性对照组比较,80-200 mg/kg组睾丸、前列腺重量及脏器系数,精子活动度、附睾尾精子计数、睾丸每日精子生成量和血清睾酮均显著下降;碱性磷酸酶（ALP）和乳酸脱氢酶（LDH）活力与染毒剂量呈负相关。结论孕鼠暴露80 mg/kg壬基酚可危害F1雄性仔鼠某些生殖功能。

十溴联苯醚在单次暴露的孕和非孕SD大鼠血液内的吸收分布

五溴联苯醚、八溴联苯醚被禁以后,十溴联苯醚(BDE-209>97%)是现在唯一仍在全球范围内广泛使用的多溴联苯醚阻燃剂。BDE-209在环境介质和生物体,甚至人体的血液、母乳中普遍存在,而且BDE-209的环境含量呈上升趋势。在实验室条件下,BDE-209可以通过生物代谢,或光降解、热降解转换形成毒性更强的低溴代PBDEs、羟基甲氧基PBDEs、致癌物多溴二苯并二噁英/呋喃(PBDD/DFs)。所以BDE-209的环境行为及生物效应成为环境污染物领域研究的热点之一。目前,关于BDE-209对妊娠期生物体的暴露研究还是很少。研究了十溴联苯醚在单次暴露的孕和非孕SD大鼠血液内的吸收代谢。结果表明,BDE-209可以被孕和非孕SD大鼠吸收,孕和非孕SD大鼠血液中吸收的BDE-209都可以快速的排出。BDE209在孕和非孕SD大鼠体内存在脱溴代谢,主要的脱溴代谢物是3种nona-BDE(sBDE-206,-207,-208)和五种octa-BDEs(BDE-196,-197/204,-198/203),其中3种nona-BDEs是主要的代谢物,而BDE-207是nona-BDEs中含量最大的单体。BDE-209及其脱溴代谢物nona-BDEs的清除速率,在SD孕鼠的体内快于SD非孕鼠,而且在暴露实验的后期还存在统计意义的显著差异性。

熊去氧胆酸对雌孕激素诱导的肝内胆汁淤积孕鼠血生化指标、肝脏病理及肝细胞膜ATP酶的影响

目的 :探讨熊去氧胆酸 (UDCA)的应用对雌、孕激素诱导的肝内胆汁淤积孕鼠血生化指标、肝脏病理以及肝细胞膜ATP酶的影响。方法 :建立妊娠肝内胆汁淤积动物模型 ,随机分为 :胆淤非治疗组、治疗组 ,设立对照组。应用比色法测定各组肝细胞膜ATP酶 ,应用光学和电子显微镜进行肝脏病理学检查。结果 :①治疗组与胆淤非治疗组比较 ,治疗组的丙氨酸转氨酶 (ALT)、门冬氨酸转氨酶 (AST)、总胆酸 (TBA)明显降低 (P <0 0 5 ) ,而对照组与治疗组之间无差异。②病理组织学检查 :胆淤非治疗组肝脏光镜下见肝细胞周围胆酸形成。对照组和治疗组肝脏电镜下毛细胆管不扩张 ,无高电子密度物沉积。③胆淤非治疗组Na+ K+ ATP酶与对照组相比明显降低 (P <0 0 5 ) ;治疗组Na+ K+ ATP酶与对照组相比无差异 ,但却明显高于胆淤非治疗组 (P <0 0 5 )。结论

锌缺乏对孕鼠及其胎鼠体内元素分布的影响

为了解锌缺乏对妊娠大鼠及胎鼠体内元素分布的影响 ,将Wistar妊娠大鼠分为缺锌组、对喂组、补锌组和对照组 ,分别喂饲缺锌 (0 7mg kg)和正常锌 (10 0mg kg)饲料 ,在妊娠第 2 1天时处死孕鼠 ,取其血液、肝、脾、肾、胎盘和胎鼠 ,用原子吸收分光光度法测定锌、铜、铁、锰、钙含量。结果表明 ,缺锌组孕鼠各组织中锌和其他元素含量均显著低于补锌组和对照组 ;而且其血液、肝、脾、肾脏中铜、铁、锰含量显著低于对喂组 ,说明锌和其他元素在肠道吸收和组织分布方面存在协同关系 ,锌缺乏所致的动物摄食量减少不是引起组织中元素含量降低的主要原因。缺锌组胎盘中铁和胎鼠中铁、钙含量则显著高于其他三组 ,反映了锌与铁元素在胎盘可能存在竞争性转运。提示锌缺乏的母体和胎儿各元素在组织中分布不一致。

饲料中不同钙含量对妊娠大鼠钙代谢的影响

目的：研究含钙１．０％、０．２５％和０．０５％三种饲料对妊娠大鼠母体及子代钙代谢的影响。结果与结论：摄食低钙饲料孕鼠的胎鼠数、重量及钙含量与摄食富钙饲料的孕鼠无明显差异，提示孕期低钙摄入对子代体格无明显不良影响。钙代谢试验表明，与１．０％Ｃａ组比较，０．２５％Ｃａ及０．０５％Ｃａ组饲料消耗量明显增加，钙的排出尤其是粪钙的排出明显减少，表明孕体对低钙供给在代谢上存在适应性改变。在０．２５％Ｃａ组，代谢的适应改变使母体钙储量增加，维持机体正钙平衡，但股骨钙量明显低于１．０％Ｃａ组，并有骨钙动员的形态学改变，在０．０５％Ｃａ组，除股骨钙量进一步减少外，母体钙呈负平衡状态，并出现更明显股骨钙动员的形态学体征。

L-赖氨酸锌的大鼠生殖毒性实验研究

用L -赖氨酸锌对大鼠进行了生殖毒性实验 ,并与对照组进行了比较 .表明L -赖氨酸锌对孕鼠具有明显的增重作用 ,对孕鼠生殖各项指标及胎鼠的内脏、骨骼、生长发育等无明显影响 .结果表明 ,实验组与阳性对照组比较 ,除低剂量组 (Ⅱ组 )差异显著外 (P <0 .0 5) ,余者均差异非常显著 (P <0 .0 1 ) ,而各剂量组之间精子畸变率无明显的剂量 -反应关系 .

叶酸缺乏孕鼠子代脑组织DNA甲基化变化

目的: 从分子水平探讨叶酸缺乏(FD)对胎鼠脑发育的影响。方法: 雌性SD大鼠实验组30只、对照组20只,分别饲以不含叶酸和含叶酸2 mg/kg的纯合饲料,2w后与雄鼠交配,于孕D20将孕鼠剖腹取胎,观察FD对胎鼠发育的影响,HPLC法检测孕鼠妊晚期末血清叶酸、胎鼠血清叶酸及胎鼠脑组织DNA甲基化水平。结果: (1)实验组孕鼠交配前及妊晚期末血清叶酸均明显低于对照组(P<0.01),外周血出现多分叶核粒细胞。实验组胎鼠血清叶酸也明显低于对照组(P<0.01),出现巨幼红细胞,RBC和Hb均低于对照组(P<0.01),且伴宫内生长迟缓。(2)实验组胎鼠脑组织DNA甲基化水平低于对照组(P<0.05),且与孕鼠及胎鼠的血清叶酸浓度呈正相关。结论: 母体FD时胎鼠的脑组织DNA甲基化水平降低,可能是胎鼠脑发育障碍的机制之一,受孕前后增补叶酸宜延长至妊娠结束。

NKx2.5基因在孕鼠肥胖致胚胎心脏畸形中的表达及意义

目的探讨NKx2.5基因mRNA及其蛋白在肥胖孕鼠胚胎畸形心脏中的表达水平及相关意义。方法 3周龄SPF级SD雌鼠100只,随机分为两组:正常组(40只)给予基础饲料;高脂组(60只)给予高脂饲料。8周后,以高脂组体重超过正常组平均体重的20%且血清总胆固醇(TC)、甘油三酯(TG)含量显著高于正常组的作为肥胖雌鼠,随机抽取20只肥胖雌鼠和正常雌鼠分别与雄鼠交配获取肥胖组孕鼠和对照组孕鼠。取孕13、15、17、19 d胚胎鼠心脏,通过切片进行组织学观察以确定心脏畸形情况,采用RT-PCR法检测NKx2.5基因的mRNA表达,采用Western blot方法检测NKx2.5蛋白表达。结果肥胖组孕鼠胚胎心脏畸形率显著高于对照组孕鼠(P<0.01);肥胖组孕鼠各孕龄胚胎畸形心脏NKx2.5基因mRNA及其蛋白表达比对照组孕鼠正常胚胎显著降低(P<0.05)。结论孕鼠肥胖导致胚胎心脏畸形率升高;孕鼠肥胖抑制胚胎心脏NKx2.5基因和蛋白表达,可能导致心脏发生发育缺陷从而造成先天性心脏畸形。

恐伤孕鼠所产21日龄仔鼠的认知发育与海马区GLU、GABA、GLY的相关性研究

目的:考察恐伤孕鼠所产21日龄仔鼠认知发育与海马区谷氨酸(Glutamic acid, GLU)、γ-氨基丁酸(Gamma-aminobutyric acid, GABA)、甘氨酸(Glycine, GLY)的相关性。方法:应用旁观电击法建立恐伤肾孕鼠模型,通过对21日龄仔鼠进行Morris水迷宫实验,观察其认知发育;通过脑立体定位仪在右侧海马区采集脑透析液,应用HPLC-ECD法测定仔鼠脑透析液中GLU、GABA、GLY含量。结果:与对照组比较,21日龄模型组仔鼠平均逃避潜伏期时间久、游泳速度慢、跨台次数少、20%边缘区域停留时间长,差异均有统计学意义(P<0.05);21日龄模型组仔鼠海马组织细胞外液中GLU、GLY的水平在各个灌流时间点均升高,而GABA的水平在各个灌流时间点均降低,差异有统计学意义(P<0.05);21日龄仔鼠海马区氨基酸类神经递质GLU、GLY与其平均逃避潜伏期、跨台次数存在负相关,与20%边缘区域停留时间呈正相关关系,差异有统计学意义(P<0.05);神经递质GABA与其平均逃避潜伏期、跨台次数存在正相关,与20%边缘区域停留时间呈负相关关系,差异有统计学意义(P<0.05)。结论:恐伤孕鼠可影响其21日龄仔鼠的认知发育及海马区GLU、GABA、GLY的含量,其认知发育水平与海马区GLU、GABA、GLY的含量改变有一定的关系。