Key Laboratory of Pediatrics in Chongqing

Chongqing, China

Key Laboratory of Pediatrics in Chongqing

Chongqing, China
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Cui X.,Chongqing Medical University | Cui X.,Childrens Hospital Of Hebei Province | Hong S.,Chongqing Medical University | Huang D.,Ministry of Education Key Laboratory of Child Development and Disorders | And 6 more authors.
International Journal of Clinical and Experimental Medicine | Year: 2017

Objective: To observe the effects of valproic acid (VPA) on the differentiation of endogenous neural stem cells of the hippocampus in rats. Methods: Hippocampus primary neural stem cells (NSCs) of newborn rats were prepared according to the methods of trypsin digestion combined with mechanical dissociation. The expressions of Nestin and Brdu proteins were identified by immunofluorescence. The neurospheres were exposed to a differentiation media and added into 250 μM (Group B), 500 μM (Group C), l mM (Group D) VPA respectively for 7-day induction. The positive rate of neuron specific enzyme (NSE) and glial fibrillary acidic protein (GFAP) positive cells were detected by immunofluorescence, and the amount of NSE and GFAP proteins were detected by Western blot. Results: NSCs were able to express Nestin, and had the ability to differentiate into neurons and astrocytes. Compared with the control group, the number of NSE positive cells in the other 3 groups significantly increased (P<0.05), and the number of GFAP positive cells significantly decreased (P<0.05). With the increase of the concentration of VPA, the number of positive NSE cells gradually increased (P<0.05), and the number of GFAP positive cells decreased gradually (P<0.05). Compared with the control group, the relative expression of NSE protein significantly increased in the other 3 groups (P<0.05), and that of GFAP protein significantly decreased (P<0.05). With the increase of the concentration of VPA, the relative expression of NSE gradually increased (P<0.05), and that of GFAP gradually decreased (P<0.05). Conclusion: NSCs which derived and cultivated from newborn rats’ hippocampus, by mechanical digestion, have perfect proliferated effects. VPA can apparently accelerate the differentiation of neural progenitor cells, interfere with the orientation of differentiation, significantly promote neuronal differentiation and inhibit differentiation of astrocytes. © 2017, E-Century Publishing Corporation. All rights reserved.

Chen Q.-X.,Chongqing Medical University | Miao J.-K.,Cooperation Technology | Li C.,Chongqing Medical University | Li X.-W.,Chongqing Medical University | And 2 more authors.
Biological and Pharmaceutical Bulletin | Year: 2013

For centuries, extracts of Acorus gramineus have been used extensively in traditional Chinese medicine for the treatment, management, and/or control of human ailments, including central nervous system disorders such as convulsions and epilepsy. In the present study, we investigated the anticonvulsant activity of chronic treatment with the plant's major essential oil component (a-asarone, 50-200 mg/kg, per os ( p.o.)) against maximal electroshock seizure (MES), pentylenetetrazole (PTZ)-induced seizures in mice, lithium-pilocarpine (LI-PILO)-induced status epilepticus (SE), and spontaneous recurrent seizures (SRSs) in rats and determined whether a single acute administration of a-asarone at various doses could produce anticonvulsant activity. As the standard antiepileptic drugs used, chronically administered a-asarone (50-200 mg/kg, p.o.) significantly delayed (p<0.05) the onset of, and antagonized maximal electroshock seizure and PTZ-induced seizures. Chronically administered a-asarone (50-200 mg/kg) also profoundly antagonized LI-PILO-induced seizures. The SE incidence, SE latency and seizure severity as well as mortality were significantly reduced after treatment with a-asarone at different doses. Higher doses of a-asarone (100-200 mg/kg) significantly reduced spontaneous recurrent seizure incidence, severity, and seizure frequency during treatment in LI-PILO-induced SRSs rats. On the other hand, a single acute administration of a-asarone (50-200 mg/kg) produced weak anticonvulsant activity in MES and PTZ-induced seizures. The results of this laboratory animal study indicate that chronically administered a-asarone possesses anticonvulsant activity in the mammalian experimental model used, and thus suggest that a-asarone may be used as a natural supplementary remedy in the management of convulsions and epilepsy. © 2013 The Pharmaceutical Society of Japan.

Lihua L.,Key Laboratory of Child Development and Disorders | Lihua L.,Key Laboratory of Pediatrics in Chongqing | Jianhui W.,Second Street | Jialin Y.,Second Street | And 6 more authors.
Polish Journal of Microbiology | Year: 2013

The Gram-negative Pseudomonas aeruginosa bacterial pathogen is reputed for its resistance to multiple antibiotics, and this property is strongly associated with the development of biofilms. Bacterial biofilms form by aggregation of microorganisms on a solid surface and secretion of an extracellular polysaccharide substances that acts as a physical protection barrier for the encased bacteria. In addition, the P. aeruginosa quorum-sensing system contributes to antibiotic resistance by regulating the expression of several virulence factors, including exotoxin A, elastase, pyoverdin and rhamnolipid. The organosulfur compound allicin, derived from garlic, has been shown to inhibit both surface-adherence of bacteria and production of virulence factors. In this study, the effects of allicin on P. aeruginosa biofilm formation and the production of quorum-sensing controlled virulence factors were investigated. The results demonstrated that allicin could inhibit early bacterial adhesion, reduce EPS secretion, and down-regulate virulence factors' production. Collectively, these findings suggest the potential of allicin as a therapeutic agent for controlling P. aeruginosa biofilm.

Hu J.,Key Laboratory of Child Development and Disorders | Hu J.,Key Laboratory of Pediatrics in Chongqing | Hu J.,Chongqing Medical University | Hu J.,Fujian Medical University | And 14 more authors.
Journal of Neurochemistry | Year: 2014

Creatine kinase has been utilized as a diagnostic marker for Duchenne muscular dystrophy (DMD), but it correlates less well with the DMD pathological progression. In this study, we hypothesized that muscle-specific microRNAs (miR-1, -133, and -206) in serum may be useful for monitoring the DMD pathological progression, and explored the possibility of these miRNAs as potential non-invasive biomarkers for the disease. By using real-time quantitative reverse transcription-polymerase chain reaction in a randomized and controlled trial, we detected that miR-1, -133, and -206 were significantly over-expressed in the serum of 39 children with DMD (up to 3.20 ± 1.20, 2-ΔΔCt): almost 2- to 4-fold enriched in comparison to samples from the healthy controls (less than 1.15 ± 0.34, 2 -ΔΔCt). To determine whether these miRNAs were related to the clinical features of children with DMD, we analyzed the associations compared to creatine kinase. There were very good inverse correlations between the levels of these miRNAs, especially miR-206, and functional performances: high levels corresponded to low muscle strength, muscle function, and quality of life. Moreover, by receiver operating characteristic curves analyses, we revealed that these miRNAs, especially miR-206, were able to discriminate DMD from controls. Thus, miR-206 and other muscle-specific miRNAs in serum are useful for monitoring the DMD pathological progression, and hence as potential non-invasive biomarkers for the disease. © 2014 International Society for Neurochemistry.

Peng C.,Chongqing Medical University | Peng C.,Key Laboratory of Child Development and Disorders | Peng C.,Cooperation Technology | Zhu J.,Key Laboratory of Pediatrics in Chongqing | And 8 more authors.
PLoS ONE | Year: 2014

Background: Cardiovascular malformations can be caused by abnormalities in Gata4 expression during fetal development. In a previous study, we demonstrated that ethanol exposure could lead to histone hyperacetylation and Gata4 over-expression in fetal mouse hearts. However, the potential mechanisms of histone hyperacetylation and Gata4 over-expression induced by ethanol remain unclear. Methods and Results: Pregnant mice were gavaged with ethanol or saline. Fetal mouse hearts were collected for analysis. The results of ethanol fed groups showed that global HAT activity was unusually high in the hearts of fetal mice while global HDAC activity remained unchanged. Binding of P300, CBP, PCAF, SRC1, but not GCN5, were increased on the Gata4 promoter relative to the saline treated group. Increased acetylation of H3K9 and increased mRNA expression of Gata4, α-MHC, cTnT were observed in these hearts. Treatment with the pan-histone acetylase inhibitor, anacardic acid, reduced the binding of P300, PCAF to the Gata4 promoter and reversed H3K9 hyperacetylation in the presence of ethanol. Interestingly, anacardic acid attenuated over-expression of Gata4, α-MHC and cTnT in fetal mouse hearts exposed to ethanol. Conclusions: Our results suggest that P300 and PCAF may be critical regulatory factors that mediate Gata4 over-expression induced by ethanol exposure. Alternatively, P300, PCAF and Gata4 may coordinate over-expression of cardiac downstream genes in mouse hearts exposed to ethanol. Anacardic acid may thus protect against ethanol-induced Gata4, α-MHC, cTnT over-expression by inhibiting the binding of P300 and PCAF to the promoter region of these genes. © 2014 Peng et al.

Hu Y.,Chongqing Medical University | Hu Y.,Key Laboratory of Child Development and Disorders | Hu Y.,Key Laboratory of Pediatrics in Chongqing | Hu Y.,Cooperation Technology | And 8 more authors.
Pediatric Infectious Disease Journal | Year: 2015

Objective: The purpose of this study was to evaluate the clinical characteristics of nervous system damage caused by enterovirus 71 (EV71) infection in pediatric patients. Study Design: Clinical data and outcomes were retrospectively analyzed for 134 cases of laboratory confirmed pediatric EV71 infection admitted to the Children's Hospital of Chongqing Medical University from January to December 2013. Results: EV71 infection was significantly more common in patients 1-4 years of age, in males and during the months of April-July. Fifty-six cases complicated by hand, foot and mouth disease were diagnosed. Fever was the most common symptom (128 of 134 patients) and lasted on average 5.3 ± 2.1 days. The most common neurologic complication was aseptic meningitis (n = 74), followed by brain stem encephalitis (n = 24), acute flaccid paralysis (AFP; n = 20), acute parencephalitis (n = 12) and encephalomyelitis (n = 4). Each was characterized by a unique profile of clinical symptoms. Damage to the pons and medulla oblongata was apparent in 28 brain magnetic resonance images. Lesions associated with AFP were concentrated in the cervical spinal cord and thoracic 8. The anterior root of the spinal anterior horn was a specific lesion. Fourteen of the AFP patients had unilateral or bilateral femoral nerve involvement. None of the patients died, and in 132 of 134 patients, follow-up visits showed that their physical and neuropsychologic abilities had returned to normal. Conclusions: Most children infected with EV71 have a good prognosis if they are diagnosed early and receive proper supportive treatment. © 2015 Wolters Kluwer Health, Inc.

Peng W.,309th Hospital of PLA | Huang X.,309th Hospital of PLA | Yang D.,Key Laboratory of Child Development and Disorders | Yang D.,Key Laboratory of Pediatrics in Chongqing | Yang D.,Chongqing Medical University
International Immunopharmacology | Year: 2014

An increasing number of T-cell epitopes derived from various tumor-associated antigens have been reported, and they proved to play significant roles for tumor rejection both in vivo and in vitro. Over 85% of Ewing's sarcoma family of tumors (ESFTs) express tumor-specific chimeric protein EWS/FLI-1, making it an attractive target for therapeutic cytotoxic T-lymphocyte responses. Here, we identified a novel peptide epitope derived from the EWS/FLI-1 protein and demonstrated that effectors induced by the peptide could specifically secrete IFN-γ and lyse the tumor cell line of EWS/FLI-1-positive and HLA-matched cells. In addition, mice treated with dendritic cells pulsed with the EWS/FLI-1 epitope were able to reject a lethal tumor inoculation of the Ewing's sarcoma A673 cells. Therefore, these data provide evidence for the use of the EWS/FLI-l peptide epitope in T cell-based immunotherapeutic concepts against Ewing's sarcoma cell in vitro and in vivo. © 2014 Elsevier B.V.

Pan B.,Chongqing Medical University | Pan B.,Key Laboratory of Pediatrics in Chongqing | Pan B.,Cooperation Technology | Zhu J.,Chongqing Medical University | And 6 more authors.
Alcoholism: Clinical and Experimental Research | Year: 2014

Background: Alcohol abuse during gestation may cause congenital heart diseases (CHDs). The underlying mechanisms of alcohol-induced cardiac deformities are still not clear. Recent studies suggest that histone modification may play a crucial role in this pathological process. Moreover, our previous studies reported that ethanol could induce histone3 lysine9 (H3K9) hyperacetylation and overexpression of heart development-related genes in vitro. The aim of this study was to investigate the effect of alcohol consumption during gestation on the imbalance of H3K9 acetylation and the alternation of the expression of heart development-related genes during cardiogenesis. Methods: Pregnant mice were exposed to a single dose of alcohol (10 μl/g/d, 56% alcohol) by gavage every day in the morning from embryo day 7.5 (E7.5) to E15.5. Hematoxylin and eosin (H&E) staining was applied for observing the structure of the embryonic hearts. Western blotting and quantitative real-time polymerase chain reaction were used for detecting the level of H3K9 acetylation and gene expression. Histone acetyltransferase (HAT) and histone deacetylase (HDAC) activities were detected by colorimetric assay and fluorometric assay. Results: H&E staining of cardiac tissue showed abnormalities of embryonic hearts at E17.5. The level of H3K9 acetylation reached peak at E17.5 and decreased sharply to a low level at birth and maintained at low level afterward. Alcohol exposure increased H3K9 acetylation at E11.5, E14.5, E17.5, and E18.5, respectively (p < 0.05), and enhanced the expression of Gata4 in the embryonic hearts at E14.5 and E17.5, Mef2c at E14.5, and Nkx2.5 at E14.5 and E17.5, (p < 0.05) but not for Tbx5 (p > 0.05). On embryonic day 17.5, HAT activities of embryonic hearts increased significantly, however alcohol exposure did not alter HDAC activities. Conclusions: These data indicate a time course of H3K9 acetylation change during heart development and demonstrate that alcohol exposure in utero may induce an increase of HAT activities, which results in H3K9 hyperacetylation and an increase of the expression of heart development-related genes. These findings reveal a novel epigenetic mechanism that connects the alcohol consumption during the pregnancy and the development of CHD in the fetus. © 2014 by the Research Society on Alcoholism.

Liu R.,Chongqing Medical University | Liu R.,Key Laboratory of Pediatrics in Chongqing | Liu R.,Cooperation Technology | He B.,Chongqing Medical University | And 11 more authors.
Translational Research | Year: 2012

Body fat is an important source of adipokines not only in association with energy balance, but also with inflammatory and immune responses. This study investigated the relationship between serum levels of adipokines and coronary artery aneurysm in patients with Kawasaki disease (KD). Levels of leptin, adiponectin, and resistin were measured in 165 cases, including 4 groups: the control group (n = 85), KD with normal coronary arteries (n = 41), KD with dilatation and/or ectasia (n = 31), and KD with coronary aneurysm (n = 8). White blood cells counts (WBC), red blood cells counts (RBC), hemoglobin (HB), Hematocrit (Hct), platelet count, C reactive protein (CRP), and erythrocyte sedimentation rate (ESR) were tested in children. Levels of adiponectin and resistin levels were significantly elevated; hemoglobin significantly decreased in the group of KD with coronary aneurysm compared with the controls or other KD subgroups. There were markedly positive relationships between levels of resistin and CRP, and negative relationships between levels of resistin and RBC in patients with KD. Levels of adiponectin, resistin, and hemoglobin were associated with the development of coronary aneurysm in children with KD. The up-regulation of resistin secreted from adipose tissue may be closely linked to up-regulation of systemic proinflammatory markers in acute KD. © 2012 Mosby, Inc. All rights reserved.

PubMed | Key Laboratory of Pediatrics in Chongqing, Chongqing Medical University and Ministry of Education Key Laboratory of Child Development and Disorders
Type: Journal Article | Journal: PloS one | Year: 2016

This meta-analysis aimed to investigate the efficacy and safety of plastic wrap applied after birth and during NICU in preterm infants for prevention of heat loss in preterm infants.The Medline (1950 to August 2015), the Cochrane Central Register of Controlled Trials (CENTRAL, Issue 7, 2015), CINAHL (1982 to August 2015) and the Embase (1974 to August 2015) databases were searched for randomized controlled trials (RCTs) or quasi-RCTs with main outcomes related to the core temperature (baseline temperature and/or post-stabilization temperature), hypothermia, mortality rate and hyperthermia.The included studies were of low to moderate quality. Compared with unwrapped infants, plastic wrap was associated with a significantly higher baseline temperature and post-stabilization temperature both in infants < 28 weeks of gestation (mean difference [MD] = 0.62, 95% CI 0.38 to 0.85; MD = 0.41, 95% CI 0.33 to 0.50, respectively), and in infants between 28 to 34 weeks of gestation (MD = 0.54, 95% CI 0.21 to 0.87; MD = 0.64, 95% CI 0.45 to 0.82, respectively). Use of plastic wrap was associated with lower incidence of hypothermia (relative risk [RR] = 0.70, 95% CI 0.63 to 0.78). However, use of plastic wrap in preterm infants was not associated with decrease in mortality (RR: 0.88, 95% CI 0.70 to 1.12, P = 0.31). Incidence of hyperthermia was significantly higher in the plastic wrap group as compared to that in the control group (RR = 2.55, 95% CI: 1.56 to 4.15, P = 0.0002). Hyperthermia in the plastic wrap group was resolved within one or two hours after unwrapping the babies.Plastic wrap can be considered an effective and safe additional intervention to prevent hypothermia in preterm infants. However, its cost-effectiveness and long-term effect on mortality needs to be ascertained by conducting well-designed studies with longer follow-up period.

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