Sturge-Weber syndrome: A case study

Sturge-Weber syndrome (SWS) is a rare, sporadic, progressive, congenital syndrome. In its complete trisymptomatic form, SWS is physically characterized by port-wine stains over the trigeminal area, leptomeningeal angiomas usually over the parieto-occipital region, and eye abnormalities. Clinical manifestation for infants with SWS depends on the affected organs, but can include seizures, mental retardation, and glaucoma. This article begins with a case presentation of an infant with SWS and then presents the etiology, embryology, pathophysiology, clinical presentation, management, and prognosis of SWS.     

Fibronectin in meningococcal sepsis. Correlation with antithrombin III and protein C

Plasma fibronectin was measured with Laurell's immunoelectroassay in 44 patients with meningococcal sepsis. The average value (15.0 +/- 7.9 mg/dl) was lower than that in normal children (27.4 +/- 8.7 mg/dl) (p less than 0.001). Fibronectin in patients correlated positively with antithrombin III (AT-III) values (p less than 0.02), but not with protein C (0.05 less than p less than 0.1). The decrease of fibronectin had no prognostic value. The fibronectin levels were lower in patients with disseminated intravascular coagulation (DIC+), than in those without DIC (DIC-) (p less than 0.02), but were lower in both groups than in a normal control group. A negative correlation between fibronectin and protein C was only present in DIC- patients (r: -0.773 = p less than 0.01). Fibronectin varied independent of AT-III and protein C in DIC+ patients. The study was repeated in 11 patients 24 hours after admission when fibronectin had decreased in 7/11 cases (mean decrease: -2.7 +/- 8.7 mg/dl). This variation correlated in a negative way with AT-III (r: -0.659 = p less than 0.05). In meningococcal sepsis fibronectin decreases very early, even in DIC- patients and its relationship to AT-III and protein C is different, depending on the presence of DIC and on the stage of evolution of the disease.     

Plasma fibronectin levels in meningococcal disease

Fibronectin (a glycoprotein which modulates inflammation) may decrease mortality in systemic infection. Children with meningococcal disease (MCD) may have low fibronectin levels. We aimed to compare plasma fibronectin levels in children with MCD and controls, correlate fibronectin levels with interleukin-6 (IL-6), shock and death, and assess fibronectin as an aid to early diagnosis in MCD. Samples were taken on admission from 99 children with MCD and 49 controls. Plasma fibronectin was measured using a turbidimetric immunoassay. Plasma fibronectin was significantly lower in MCD compared to controls (57 μg/ml vs 105 μg/ml; P < 0.005). Children who died had significantly lower levels than survivors (29 μg/ml vs 62 μg/ml; P = 0.01). Fibronectin levels were negatively correlated with IL-6 levels. Fibronectin was a poor predictor of MCD. Conclusion Plasma fibronectin levels are decreased in children with MCD, especially in shock and death. This decrease is associated with high IL-6 levels. Fibronectin could be a novel therapy in severe MCD. Received: 6 June 1996 / Accepted: 16 October 1996     

Fibronectin in bronchoalveolar lavage fluid and plasma from children with chronic inflammation of lungs

Fibronectin/albumin ratios in plasma and in bronchoalveolar lavage fluid were evaluated in patients (1-6 years of age) with recurrent obstructive bronchitis and different interstitial lung diseases. These inflammatory reactions were characterized by increased influx of macrophages on the bronchoalveolar surface, but an increase in the proportion of lymphocytes or neutrophils was also detected in the group of patients with lymphocyte-macrophage or neutrophil-macrophage alveolitis. There was no considerable difference in plasma fibronectin concentrations obtained from healthy children and patients with moderate obstructive bronchitis and slight inflammation of the bronchial mucosa observed bronchoscopically. Levels of plasma fibronectin were elevated in patients with serious bronchial inflammation and different alveolitis, but they were within the normal range. A comparison of lavage fibronectin/albumin ratios with plasma fibronectin/albumin ratios with plasma fibronectin/albumin ratios indicated significant local production of fibronectin in subjects with serious bronchial inflammation and interstitial lung disorders. Fibronectin detected on the bronchoalveolar surface seems to be an important factor in mediating cell-to-cell interactions in the repair of the bronchoalveolar structures, and in tracing the activity of the inflammatory reactions not only in patients with interstitial lung diseases, but also in patients with serious chronic bronchial inflammation.     

Gene expression profiling reveals intrinsic differences between T-cell acute lymphoblastic leukemia and T-cell lymphoblastic lymphoma

BACKGROUND: T-cell acute lymphoblastic leukemia (T-ALL) and T-cell lymphoblastic lymphoma (T-LL) and are often thought to represent a spectrum of a single disease. The malignant cells in T-ALL and T-LL are morphologically indistinguishable, and they share the expression of common cell surface antigens and cytogenetic characteristics. However, despite these similarities, differences in the clinical behavior of T-ALL and T-LL are observed. PROCEDURE: We analyzed the gene expression profiles of T-ALL and T-LL samples obtained from Children's Oncology Group (COG) tumor banks using DNA arrays. Immunohistochemistry was also performed to validate the expression of selected targets. RESULTS: Unsupervised hierarchical clustering of all samples showed complete segregation of T-ALL and T-LL into distinct clusters. Next, we identified the top 201 genes that best differentiated T-ALL from T-LL using significance analysis of microarrays (SAM), a supervised statistical approach. Genes representing several functional groups were differentially expressed in T-LL and T-ALL. Prediction analysis of microarrays (PAM) identified a subset of genes, which accurately classified all 19 T-ALL and T-LL samples with an overall misclassification error rate of 0. Immunohistochemical validation of protein expression of selected genes identified by microarray analysis confirmed overexpression of MLL-1 in T-LL tumor cells compared to T-ALL and CD47 in T-ALL tumors cells when compared to T-LL. CONCLUSIONS: Despite significant similarities between the malignant T-cell precursors, clear differences in the gene expression profiles were observed between T-ALL and T-LL implying underlying differences in the biology of the two entities.     

Fibronectin in Meningococcal Sepsis

ABSTRACT. Plasma fibronectin was measured with Laurell's immunoelectroassay in 44 patients with meningococcal sepsis. The average value (15.0±7.9 mg/dl) was lower than that in normal children (27.4±8.7 mg/dl) (p<0.001). Fibronectin in patients correlated positively with antithrombin III (AT-III) values (p<0.02), but not with protein C (0.05+), than in those without DIC (DIC⁻) (p<0.02), but were lower in both groups than in a normal control group. A negative correlation between fibronectin and protein C was only present in DIC⁻ patients (r:-0.773=p<0.01). Fibronectin varied independent of AT-III and protein C in DIC⁺ patients. The study was repeated in 11 patients 24 hours after admission when fibronectin had decreased in 7/11 cases (mean decrease: -2.7±8.7 mg/dl). This variation correlated in a negative way with AT-III (r:-0.659=p<0.05). In meningococcal sepsis fibronectin decreases very early, even in DIC⁻ patients and its relationship to AT-III and protein C is different, depending on the presence of DIC and on the stage of evolution of the disease.     

HER2 Amplification and Overexpression Is Not Present in Pediatric Osteosarcoma: A Tissue Microarray Study

The HER2 gene, located on 17q, encodes a 185-kD transmembrane tyrosine kinase receptor. Amplification of this gene with overexpression of the gene product occurs in about 30% of cases of breast cancer and is considered to be a poor prognostic indicator for this tumor. Results for HER2 expression in osteosarcoma are controversial, with some studies reporting up to 61% of positive cases and others reporting only negative results. Further, expression of HER2 is reported to be a favorable prognostic indicator by some groups and unfavorable by others. The present study used tissue microarrays containing 34 samples of osteosarcoma from 18 patients to analyze HER2 expression by immunohistochemistry and gene copy number by chromogenic in situ hybridization. The microarray included 13 pretreatment biopsies, 11 posttreatment resection specimens, and 10 resected metastases and comprised 18 osteoblastic, 6 chondroblastic, 5 fibroblastic, and 5 mixed subtypes. HER2 protein expression was seen in 4 of 34 (12%) tumor samples that originated from 2 of 18 patients (11%). The staining pattern was consistently weak and focal, and immunohistochemical overexpression of the HER2 protein, defined as complete membrane positivity, was never observed. Further, the presence of HER2 gene amplification was not detected in any osteosarcoma by chromogenic in situ hybridization. Therefore, therapies based on antibodies directed against the HER2 protein are unlikely to have much value in the treatment of pediatric osteosarcomas. From a technical standpoint, this study also demonstrates the value of tissue microarrays in screening tumors at the protein and gene levels using conventional light microscopy.     

Fibronectin in Bronchoalveolar Lavage Fluid and Plasma from Children with Chronic Inflammation of Lungs

ABSTRACT. Fibronectin/albumin ratios in plasma and in bronchoalveolar lavage fluid were evaluated in patients (1–6 years of age) with recurrent obstructive bronchitis and different interstitial lung diseases. These inflammatory reactions were characterized by increased influx of macrophages on the bronchoalveolar surface, but an increase in the proportion of lymphocytes or neutrophils was also detected in the group of patients with lymphocyte-macrophage or neutrophil-macrophage alveolitis. There was no considerable difference in plasma fibronectin concentrations obtained from healthy children and patients with moderate obstructive bronchitis and slight inflammation of the bronchial mucosa observed bronchoscopically. Levels of plasma fibronectin were elevated in patients with serious bronchial inflammation and different alveolitis, but they were within the normal range. A comparison of lavage fibronectin/albumin ratios with plasma fibronectin/albumin ratios with plasma fibronectin/albumin ratios indicated significant local production of fibronectin in subjects with serious bronchial inflammation and interstitial lung disorders. Fibronectin detected on the bronchoalveolar surface seems to be an important factor in mediating cell-to-cell interactions in the repair of the bronchoalveolar structures, and in tracing the activity of the inflammatory reactions not only in patients with interstitial lung diseases, but also in patients with serious chronic bronchial inflammation.     

Plasma fibronectin concentrations in breast fed and formula fed neonates.

Plasma fibronectin concentration was measured in neonates of 2 to 5 days of age. Although breast fed and formula fed infants were similar in demographic characteristics, the mean (SD) plasma concentration of fibronectin in 26 breast fed infants, 237 (117) mg/l, was significantly higher than in 27 formula fed infants (171 (91) mg/l). Fibronectin was detected in five colostrum specimens (mean concentration 13.4 mg/l). Similar bands were detected after gel electrophoresis of purified adult plasma fibronectin and whole plasma from breast fed and formula fed neonates after staining or immunoblotting. Fibronectin isolated from breast milk also appeared similar to purified plasma fibronectin. It is possible, although unlikely, that fibronectin is absorbed intact from ingested colostrum. Alternatively, a factor(s) might be present in colostrum that contributes to the regulation of plasma fibronectin concentration.     

Decreased plasma fibronectin in neonatal sepsis

Fibronectin is a large opsonic glycoprotein which promotes reticuloendothelial system clearance of bacteria, immune complexes, collagenous debris, and damaged platelets. The concentration of plasma fibronectin is decreased in the newborn infant; however, the role of fibronectin in the onset and course of neonatal sepsis is unknown. Serial plasma fibronectin levels were determined in 19 neonates with documented bacterial sepsis. Plasma fibronectin concentrations decreased significantly (P less than .001) in all study infants concurrent with the development of septicemia. Recovery of plasma fibronectin to normal levels occurred by day 5 in premature neonates and by days 7 to 10 in term neonates. Fibronectin deficiency and resultant reticuloendothelial system impairment may decrease the ability of newborn infants to resist or clear bacterial infections. An acute reduction in the concentration of plasma fibronectin may be a valuable marker for neonatal sepsis.     

高超二倍体核型儿童急性淋巴细胞白血病的临床特征及预后——福建省多中心回顾性研究

目的 检测儿童急性淋巴细胞白血病（acute lymphoblastic leukemia,ALL）患儿骨髓单个核细胞中E-钙黏蛋白（E-cadherin）mRNA及蛋白水平表达和基因甲基化状态,探讨E-cadherin在儿童ALL的意义及甲基化状态与预后的关系。 方法 采集42例初次确诊的ALL患儿确诊时（治疗前组）及诱导化疗第33天（治疗后组）的骨髓血5 mL,应用RT-qPCR、Westerm blot及甲基化特异性PCR法检测骨髓单个核细胞中E-cadherin mRNA及蛋白表达和E-cadherin基因甲基化水平,并比较治疗前后各指标的变化。 结果 治疗后组E-cadherin mRNA及蛋白的表达水平均高于治疗前组（P<0.05）;治疗后组E-cadherin基因甲基化阳性率较治疗前组下降（P<0.05）;至试验终点时,甲基化阴性者总生存率和无事件生存率均高于甲基化阳性者（P<0.05）。 结论 E-cadherin表达与儿童ALL发展相关,表达降低及甲基化水平增高可能提示预后不良。     

缺氧缺血新生大鼠神经元自噬基因表达节律及调控机制

目的通过新生大鼠缺氧缺血脑损伤后神经元自噬基因和节律基因的表达,探讨缺氧缺血引起神经损伤的新机制。方法将12只Sprague-Dawley大鼠随机分为缺氧缺血组和假手术组,每组6只。采用结扎并切断大鼠右侧颈总动脉并给予低氧处理的方法建立体内缺氧缺血脑损伤模型。Western blot检测两组大鼠大脑皮层和海马组织节律蛋白Clock表达情况。体外培养大鼠神经元细胞,随机分为氧糖剥夺(OGD)组和对照组,OGD组加入无糖无血清DMEM培养基模拟细胞缺血状态,并给予低氧处理建立体外缺氧缺血脑损伤模型。采用Western blot检测两组不同时间点自噬相关蛋白Beclin1和LC3,以及节律基因Clock蛋白表达情况。应用si RNA技术抑制神经元Clock蛋白表达后,检测Beclin1和LC3的表达变化。结果体外培养神经元Beclin1和LC3Ⅱ的表达呈现节律性波动;OGD处理后,体外培养神经元Beclin1和LC3Ⅱ的表达随着时间的延长逐渐升高,不再呈现节律性波动;与假手术组相比,缺氧缺血引起大鼠皮层和海马组织Clock表达降低(P0.05);体外培养神经元经OGD处理后,Clock表达也较对照组显著降低(P0.05);与阴性对照组相比,抑制神经元节律基因Clock表达后,自噬相关蛋白Beclin1和LC3Ⅱ的表达均显著下降(P0.05)。结论缺氧缺血引起神经元Beclin1和LC3Ⅱ表达节律紊乱,其机制可能与Clock参与调控Beclin1和LC3Ⅱ的表达有关。     

Plasma fibronectin levels in extremely preterm infants in the first 8 weeks of life

Abstract Fibronectin has in the past been considered to function simply as a non-specific plasma opsonin. However, recent studies have demonstrated that this molecule plays an important role in fundamental components of the immune response, for example, neutrophil adhesion, T cell activation and endothelial function. Additionally, fibronectin is important in lung homeostasis where it contributes to alveolar epithelial integrity. In this study plasma fibronectin levels were measured longitudinally in a group of extremely preterm infants, mean gestational age 27 weeks.
Plasma fibronectin levels at birth were significantly lower in the preterm study group than in term controls (mean 91±33 μg/mL compared with 214±62 μg/mL in the term controls, P <0.0001). The preterm cohort demonstrated a more than two-fold rise in plasma fibronectin on days one and two; levels fell almost to baseline values by day three with a subsequent slow rise to a plateau by day 28. No further increase was seen by day 56. This sequence of early changes in fibronectin levels mirrored closely the time course of respiratory distress syndrome. Infants of mothers with pre-eclampsia had significantly lower peak fibronectin levels than in those without ( P = 0.016), and those infants with bronchopulmonary dysplasia showed a trend towards lower basal fibronectin levels ( P = 0.07) and a greater difference between peak and basal levels ( P = 0.05).
Neonates, particularly those born preterm, have blunted immunological responses to infection. Fibronectin plays a key role in immunological responsiveness. The significant changes in fibronectin levels after birth in the preterm neonate are likely to have important pathophysiological consequences. The relationship between alterations in fibronectin after birth, endothelial and epithelial cell function, and respiratory distress syndrome (RDS) remain to be explored.     

EXPRESSION OF PTEN AND SHP1, INVESTIGATED FROM TISSUE MICROARRAYS IN PEDIATRIC ACUTE LYMPHOBLASTIC,LEUKEMIA

PTEN and SHP1 are tumor suppressor genes involved in the regulation of cell cycle control and apoptosis. The authors investigated the protein expression of PTEN and SHP1, by immunohistochemistry in tissue microarrays from bone marrow samples in children, diagnosed with acute lymphoblastic leukaemia and nonmalignant controls. PTEN was overexpressed in diagnostic ALL samples, while SHP1 showed a low expression. Both proteins showed a significant difference in expression compared to nonmalignant controls. The roles of PTEN and SHP1 are not well investigated in pediatric leukemia and could in the future play a role as prognostic factors.     

沉默PAX2基因对肾间质纤维化大鼠的影响

目的 探讨体内沉默PAX2基因对肾间质纤维化大鼠肾小管上皮细胞转分化(EMT)的影响。方法 64只Wistar大鼠麻醉后,单侧输尿管结扎法制作肾间质纤维化大鼠模型,随机分为阴性对照组和PAX2基因沉默组,每组32只。将200 μL NC-siRNA-in vivo jetPEITM混合液转染阴性对照组大鼠,将200 μL PAX2-siRNA-in vivo jetPEITM混合液转染PAX2基因沉默组大鼠,各组分别于转染后3、5、7、14 d分为4个亚组,每组8只。留取各组肾组织标本,应用Real-Time PCR及Western blot法检测肾皮质PAX2 mRNA及其蛋白的沉默情况,以及E-钙粘连素(E-cadherin)、α-平滑肌肌动蛋白(α-SMA)mRNA和蛋白表达情况。结果 PAX2基因沉默组PAX2 mRNA和蛋白表达量较阴性对照组均降低 (P < 0.05)。随着梗阻时间的延长,两组E-cadhelin mRNA和蛋白表达量逐渐下降,α-SMA mRNA和蛋白表达量逐渐升高;在转染14 d时,PAX2基因沉默组E-cadhelin mRNA和蛋白相对表达量明显高于阴性对照组 (P < 0.05),而α-SMA mRNA和蛋白相对表达量明显低于阴性对照组 (P < 0.05)。结论 沉默PAX2基因在肾间质纤维化晚期大鼠中可明显抑制肾小管EMT进程,可能对肾间质纤维化有治疗作用。     

内皮素及一氧化氮在肾小球硬化大鼠肾组织的表达及意义(英文)

目的　内皮素 1(ET 1)和一氧化氮 (NO)是否参与了肾小球硬化过程尚缺乏广泛的认识。本实验通过制备阿霉素肾小球硬化大鼠模型并应用血管紧张素转换酶抑制剂 (ACEI)莱那普利和血管紧张素Ⅱ Ⅰ型受体拮抗剂芦沙坦干预 ,观察ET 1和NO在肾小球硬化过程中的变化及作用。方法　大鼠随机分成假手术 (对照 )组(C组 ) ,肾小球硬化组 (D组 ) ,肾小球硬化苯那普利治疗组 (DB组 )和肾小球硬化芦沙坦治疗组 (DL组 ) ,治疗 6周后用RT PCR分别测定肾皮质内皮素 1(ET 1)和诱导型一氧化氮合酶 (iNOS)表达 ,用Westernblotting测定ET 1和iNOS蛋白 ,免疫组化测定肾组织Ⅳ型胶原 (ColⅣ )和纤维连接蛋白 (Fn)。结果　肾小球硬化组出现明显蛋白尿、血白蛋白下降及胆固醇上升和肾小球系膜细胞增生 ,细胞外基质沉积。肾皮质ET 1mRNA和蛋白表达为对照组的 3.5 8倍和 2 .83倍 ,肾皮质iNOSmRNA和蛋白表达为对照组的 4 .2 8倍和 3.15倍 ,肾皮质ColⅣ和Fn表达也明显上调。苯那普利和芦沙坦分别治疗 6周后 ,能明显减轻肾小球硬化的生化改变及病理改变 ,同时下调了ET 1、iNOSmRNA及蛋白表达 ,ColⅣ和Fn水平也降低。结论　ET 1和NO参与了肾小球硬化进展。ET 1andiNOS的抑制阻滞了细胞外基质的沉积 ,从而可以预防肾小球硬化症的发生。     

整合素β3受体信号途径在结缔组织生长因子调控肺动脉平滑肌细胞增殖与迁移和细胞外基质基因表达中的作用

目的 探讨整合素β3受体信号途径在结缔组织生长因子(CTGF)促进肺动脉平滑肌细胞增殖、迁移和细胞外基质基因表达中的作用机制研究.方法 分离并培养SD大鼠肺动脉中膜平滑肌细胞,实验使用第3～7代细胞;细胞分为3组:(1)空白组:不加任何刺激因子;(2)CTGF组:培养体系中加入CTGF(50 ng/ml);(3)CTG...     

The roles of extracellular matrix proteins,apoptosis and c-kit positive cells in the pathogenesis of ureteropelvic junction obstruction

AimTo investigate histopathological changes in ureteropelvic junction obstruction (UPJO) from an etiological perspective.Patients and methodsMedical records of patients with UPJO were reviewed and pathological specimens collected. Nephrectomy materials from forensic autopsies were taken as controls. Specimens were assessed with light microscopy. Fibronectin, type 4 collagen, laminin, Bax and Bcl-2 expression for apoptosis, together with interstitial cells of Cajal determination with c-kit were determined immunohistochemically. Staining scores were evaluated semiquantitatively. Results were evaluated using Mann–Whitney U-test.ResultsControl group comprised 14 children (median age, 3.5 years; 6 months–17 years). Study group comprised 22 children with UPJO (median age, 9 months; 1 month–10 years). Light microscopy revealed non-specific inflammation, epithelial proliferation and atrophy with fibrosis in the smooth muscle of the UPJ in all patients. Fibronectin, type 4 collagen and laminin were found to be significantly increased in UPJO at the intrafascicular space of smooth muscle and the matrix of stroma. Bcl-2 expression was increased in UPJO. c-Kit was unable to stain interstitial cells of Cajal, but staining for mast cells was significant.ConclusionsHigh expression of fibronectin, laminin and type 4 collagen may indicate a relation to the pathogenesis of UPJO. Defective kidney morphogenesis, during branching and tubulogenesis of ureteric bud, may be responsible for this congenital pathology.     

Development of tight junction molecules in blood vessels of germinal matrix, cerebral cortex, and white matter

Tight junction (TJ) molecules confer cell-to-cell adhesion to endothelial cells and, thus, provide structural integrity to blood vessels. Therefore, decreased expression of these molecules may be a cause of germinal matrix (GM) fragility and their propensity to hemorrhage in premature infants. The objective of this study was to compare the expression of endothelial TJ molecules, including claudin-5, occludin, and junction adhesion molecules (JAM), among blood vessels of GM, cortex, and white matter for fetuses and premature infants of gestational age 16-40 wk, and to examine their maturational changes with advancing gestational age. We measured the expression of claudin-1, claudin-5, occludin, and JAM in GM, cortex, and white matter in postmortem brain samples. We performed immunohistochemical staining on brain sections and Western blot to quantify these molecules. We found that claudin-5, occludin, and JAM-1 were expressed as early as 16 wk in GM, cortex, and white matter. Claudin-1, JAM-2, and JAM-3 were not detected in the GM, cortex, and white matter. Claudin-5, occludin, and JAM-1 did not change significantly as a function of gestational age. There was no significant difference in the expression of these molecules in the vasculature of GM compared with cortex and white matter. Because the primary endothelial TJ molecules, including claudin-5, occludin, and JAM-1, are expressed as early as 16 wk in the blood brain barrier and since as they are not decreased in GM vasculature compared with cortex and white matter, they are unlikely to be responsible for GM fragility and vulnerability to hemorrhage in premature infants.     

新生大鼠缺氧缺血脑损伤后μ-calpain活化及其他相关因子表达变化的时程及意义

目的　探讨新生大鼠缺氧缺血性脑损伤 (HIBD)后脑内 μ calpain的活化、其他相关因子表达变化的时程及相互关系 ,进一步研究HIBD的发病机制。方法　HIBD模型采用改良的Rice法。应用Westernblot法半定量测定缺氧缺血 (HI)后 0、1、2、4、12和 2 4h大脑皮层和海马μ calpain、c Fos、c Jun、HSP70和HSP2 7的表达。蛋白浓度测定采用改良的Bradford法。结果　新生大鼠HI后 μ calpain裂解为 76和 80两个片段 ,两者比值在HI后显著提高 ,以海马更为明显 ,其中皮层在 2 4h、海马在 12h达到高峰。c Fos在HI后 2～ 12h海马显著高于皮层 (P <0 0 5 ) ,2 4h海马却低于皮层 (P <0 0 5 ) ;c Jun则 0～ 1h海马高于皮层 (P <0 0 5 ) ,4h以后皮层均高于海马 (P <0 0 5 ) (其中 12h差异无显著意义 )。c Fos和c Jun在HI后呈上升趋势 ,无论皮层或海马均在 2～ 4h达到高峰 ,以后渐下降 ,但 2 4h仍高于正常对照组。与对照组相比 ,c Fos在 1,2 ,4 ,12和 2 4h差异有显著意义 (P <0 0 5 ) ;c Jun在 0 ,1,2 ,4 ,12和 2 4h差异有显著意义 (P <0 0 5 )。HSP70在HI后 0h皮层显著高于海马 (P <0 0 5 ) ,1h海马显著高于皮层 (P <0 0 5 ) ,4h后皮层又均高于海马 (P <0 0 5 ) ;HSP2 7则HI后 1～ 2 4h海马均显著高于皮层 (P <0