A case of 15q11-q13 duplication syndrome and literature review.

BACKGROUND: The chromosomal 15q11-q13 regions are structurally complex, and their abnormalities are associated with various neuropsychiatric disorders, including autism spectrum disorder (ASD), epilepsy, Angelman syndrome, and Prader-Willi syndrome. CASE DESCRIPTION: A 6-year-old child was admitted to the hospital as a result of an "epileptic status" showing ASD, intractable epilepsy, and total developmental retardation. Chromosome gene detection showed repetitive variation in the 15q11-q13 regions, and the video electroencephalogram was abnormal. Although children are currently given antiepileptic treatment and rehabilitation training, intermittent seizures can still occur. CONCLUSION: The clinical phenotypes of 15q11-q13 repetitive syndrome are complex, and vary in severity. Children with intractable epilepsy, ASD, and language and motor retardation should be considered to have this syndrome, which requires confirmation by multiplex ligation-dependent probe amplification and gene detection. These approaches can enable early rehabilitation treatment and improve the patients' quality of life.

Differentiation of mesenchymal stem cells from human umbilical cord tissue into odontoblast-like cells using the conditioned medium of tooth germ cells in vitro.

The easily accessible mesenchymal stem cells in the Wharton's jelly of human umbilical cord tissue (hUCMSCs) have excellent proliferation and differentiation potential, but it remains unclear whether hUCMSCs can differentiate into odontoblasts. In this study, mesenchymal stem cells were isolated from the Wharton's jelly of human umbilical cord tissue using the simple method of tissue blocks culture attachment. UCMSC surface marker expression was then evaluated for the isolated cells using flow cytometry. The third-passage hUCMSCs induced by conditioned medium from developing tooth germ cells (TGC-CM) displayed high alkaline phosphatase (ALP) levels (P < 0.001), an enhanced ability to proliferate (P < 0.05), and the presence of mineralized nodules. These effects were not observed in cells treated with regular medium. After induction of hUCMSCs, the results of reverse transcriptional polymerase chain reaction (PCR) indicated that the dentin sialophosphoprotein (DSPP) and dentin matrix protein 1 (DMP1) genes were significantly tested. Additionally, dentin sialoprotein (DSP) and DMP1 demonstrated significant levels of staining in an immunofluorescence analysis. In contrast, the control cells failed to display the characteristics of odontoblasts. Taken together, these results suggest that hUCMSCs can be induced to differentiate into odontoblast-like cells with TGC-CM and provide a novel strategy for tooth regeneration research.

[Protective effect of total flavonoid of Herba Pyrolae on acute myocardial ischemic injury in rats].

OBJECTIVE: To investigate the protective effect of Total Flavonoid of Herba Pyrolae(TFHP) on acute myocardial ischemic injury in rats. METHODS: Acute myocardial ischemic models were established by i. v. injection of pituitrin and the ligation of left descending coronary artery in rats. ECG of the rat was recorded, myocardial ischemic size was evaluated, and activites of creatine phosphokinase( CK), lactate dehydrogenase (LDH) and superoxide dismutase (SOD), level of malondialdehyde (MDA) in the rat serum were determined. RESULTS: In comparison with the model control, TFHP significantly reduced the incidence of ischemic arrhythmia induced by pituitrin, size of myocardial infarction, release of myocardial CK and LDH caused by the ligation of left descending coronary artery in rats. The primary study of action mechanism showed that TFHP decreased MDA level and increased SOD activity in the rat serum. CONCLUSION: TFHP provide a protective effect on acute myocardial ischemic injury via antioxidation.