Objective:To observe the effect of curcumin(Cu) on collagen deposition and the expression of transforming growth factor-?1(TGF-?1) in neonatal rats with hyperoxia-induced pulmonary fibrosis.Methods: A total of 160 term neonatal rats within 12 hours after birth were equally randomized into Group 1(air-exposed),2(air-exposed + Cu-treated),3(hyperoxia-exposed) and 4(hyperoxia-exposed + Cu-treated).The neonatal rats in Groups 3 and 4 were kept in the chambers containing 90% concentration oxygen and intraperitoneally injected with curcumin(200mg/) in the oleum lini solution,while those in Groups 1 and 2 were exposed to room air and intraperitoneally given the same dose of oleum lini only.Five rats were randomly taken from each group and sacrificed at 3,7,14 and 21 days,respectively,after the treatment,their lungs incised for HE and Masson staining and the protein expressions of TGF-?1 detected by immunohistochemistry.Results: A great deal of collagen deposition was observed in the bronchus submucosa,the vessel wall and its surroundings,the alveollar wall and the lung interstitium in Group 3,less obvious in Group 4,and the least obvious in Groups 1 and 2.The expression of TGF-?1 was significantly higher in Group 3 than in Group 4(P

The precocious puberty in female rats were induced by subcutaneous injection of N-methyl-DL-aspartate (NMA). The female rats with induced precocious puberty showed the same sexual feature as the rats that had normal puberty. NMA plays its role at the level of hypothalamus. Subcutaneous injection of NMA is an effective means to induce true precocious puberty in female rats.

AIM: To investigate the effect of glomerular intercellular interaction under high glucose concentration on the production of reactive oxygen species (ROS) and transforming growth factor ?_1 (TGF-?_1) in co-cultured human ECV304 cells, and to study the intervention with tea polyphenols (TPs). METHODS: The endothelial cells were cultured alone or co-cultured with mesangial cells in high glucose media with or without TPs for 0 h, 12 h and 36 h, respectively. The activity of SOD and the content of MDA in the media of the system were detected by spectrophotometry. The expression of TGF-?_1 mRNA in the endothelial cells was measured by using semi-quantitative reverse transcription PCR (RT-PCR). RESULTS: High glucose decreased the activity of SOD, increased the content of MDA and up-regulated the expression of TGF-?_1 mRNA in co-cultured ECV304 cells and the effect became more prominent than the single-cultured cells. TPs interrupted it more effectively. CONCLUSION: These data suggest that there is interaction between mesangial cells and ECV304 cells under high glucose concentration. The interaction may markedly up-regulate the production of ROS and the expression of TGF-?_1 in co-cultured ECV304 cells. TPs may protect ECV304 cells by intervening intercellular interaction.

Objective: To explore the genetic basis of a neonate with argininosuccinic aciduria (ASA). Methods: A neonate with lethargy and food refusal was admitted. The patient had myoclonus, myasthenia, uroschesis, irregular breathing and paroxysmal ventricular tachycardia, and died at 75 hours after birth. Laboratory test showed marked increase in blood ammonia (1249.8 μmol/L). Peripheral blood samples of the patient, her parents and sister were collected and subjected to trio whole-exome sequencing. Results: Whole-exome sequencing revealed that the patient has carried compound heterozygous mutations of the argininosuccinate lyase (ASL) gene, namely c. 425(exon5)_c.426(exon5) insAGCTCCCAGCT (p.Thr142Thrfs*37) and c. 626(exon8)delT (p.Leu209Argfs*42). The patient was diagnosed as ASA caused by ASL gene mutations. Her parents and her elder sister were heterozygous carriers of the above mutations and had a normal phenotype. Conclusion ASA is a severe congenital genetic metabolic disease and can manifest as onset of hyperammonemia in neonates. The clinical diagnosis is difficult and ASL gene testing may be helpful.

OBJECTIVE: To explore the genetic basis of a neonate with argininosuccinic aciduria (ASA). METHODS: A neonate with lethargy and food refusal was admitted. The patient had myoclonus, myasthenia, uroschesis, irregular breathing and paroxysmal ventricular tachycardia, and died at 75 hours after birth. Laboratory test showed marked increase in blood ammonia (1249.8 μmol/L). Peripheral blood samples of the patient, her parents and sister were collected and subjected to trio whole-exome sequencing. RESULTS: Whole-exome sequencing revealed that the patient has carried compound heterozygous mutations of the argininosuccinate lyase (ASL) gene, namely c.425(exon5)_c.426(exon5) insAGCTCCCAGCT (p.Thr142Thrfs*37) and c.626(exon8)delT (p.Leu209Argfs*42). The patient was diagnosed as ASA caused by ASL gene mutations. Her parents and her elder sister were heterozygous carriers of the above mutations and had a normal phenotype. CONCLUSION ASA is a severe congenital genetic metabolic disease and can manifest as onset of hyperammonemia in neonates. The clinical diagnosis is difficult and ASL gene testing may be helpful.
Argininosuccinate Lyase ; genetics ; Argininosuccinic Aciduria ; diagnosis ; genetics ; Female ; Genetic Testing ; Humans ; Hyperammonemia ; Infant, Newborn ; Pedigree

In a previous study, we screened thousands of long non-coding RNAs (lncRNAs) to assess their potential relationship with congenital heart disease (CHD). In this study, uc.4 attracted our attention because of its high level of evolutionary conservation and its antisense orientation to the CASZ1 gene, which is vital for heart development. We explored the function of uc.4 in cells and in zebrafish, and describe a potential mechanism of action. P19 cells were used to investigate the function of uc.4. We studied the effect of uc.4 overexpression on heart development in zebrafish. The overexpression of uc.4 influenced cell differentiation by inhibiting the TGF-beta signaling pathway and suppressed heart development in zebrafish, resulting in cardiac malformation. Taken together, our findings show that uc.4 is involved in heart development, thus providing a potential therapeutic target for CHD.

Objective:To investigate the expression of DARS2 and its clinical significance in colorectal cancer.Methods:In this study, bioinformatics tools, especially gene expression profile interactive analysis 2 (GEPIA2), were used to conduct an in-depth analysis of DARS2 expression in colorectal cancer tissues. Immunohistochemical staining was carried out in 108 colorectal cancer specimens and 30 normal colorectal tissues obtained from the First Affiliated Hospital of Nanchang University, Nanchang, China. Colorectal cancer cell lines (HCT116 and SW480) were transfected with small interfering RNA (siRNA) and DARS2 overexpression plasmid to examine the effects of DARS2 knockdown and overexpression on cell function. To assess the effects on cell function, CCK8 and transwell migration assays were used to assess proliferation and cell motility, respectively. Additionally, protein immunoblotting was employed to scrutinize the expression of proteins associated with the epithelial-mesenchymal transition of colorectal cancer cells.Results:DARS2 exhibited a pronounced upregulation in expression within colorectal cancer tissues compared to their normal epithelial counterparts. Furthermore, DARS2 expression was higher in colorectal cancer of stage Ⅲ-Ⅳ than those of stage Ⅰ-Ⅱ, exhibiting a significant correlation with N staging, M staging, and pathological staging ( P<0.05). Kaplan-Meier analyses showed a decreased overall survival rate in colorectal cancer with DARS2 expression compared to those without DARS2 expression ( P<0.05). In the siRNA transfection group, there was a significant reduction in cell proliferation and migration ( P<0.01 and P<0.05, respectively). Conversely, the transfection of DARS2 overexpression plasmids substantially increased both cell proliferation and migration ( P<0.05). Additionally, immunoblotting revealed that DARS2 knockdown led to an upregulation of E-cadherin expression and a downregulation of N-cadherin and vimentin expression. In contrast, DARS2 overexpression resulted in increased N-cadherin and vimentin expression, coupled with reduction in E-cadherin expression. Conclusions:There is a strong association between DARS2 expression and colorectal cancer progression. Silencing DARS2 inhibits cell proliferation and migration, exerting a discernible influence on the epithelial-mesenchymal transition process.

OBJECTIVE To analyze the chemical constituents from classical prescription Xiehuang San(XHS)standard decoc-tion by UPLC-Q-TOF-MS technology,and classify the chemical composition and analyze the representative components.METHODS Acquity HSS T3 column(2.1 mm×100 mm,1.8 μm)was used as the chromatographic column,with 0.1%formic acid solution-0.1%formic acid acetonitrile as the mobile phase for gradient elution.The volume flow rate was 0.4 mL·min-1 and the column tem-perature was 40℃.Mass spectrometry data of XHS were collected in positive and negative ion modes.The chemical constituents from classical prescription XHS were analyzed and identified by Masslynx 4.1 software comparison with reference materials,mass spectrome-try data analysis and reference to relevant literature.RESULTS A total of 107 compounds were analyzed and identified from XHS,including 45 flavonoids,27 triterpenoids,11 monoterpenoids,10 phenylpropanoids,6 chromogenic ketones,5 alkaloids and 3 other other compounds.CONCLUSION The study provides an experimental basis for the further research on the substance basis and qual-ity control of XHS.