Female ; Hamartoma ; Humans ; Infant, Newborn ; Mouth Diseases ; Palate, Soft

BACKGROUND:How to promote wound healing is always the research focus of the surgical physicians in the clinic. Recombinant human epidermal growth factor (rhEGF) can effectively promote wound healing. However, as a biological agent, it is easy to be decomposed under normal temperature.
OBJECTIVE:Toexplorethe mechanisms underlying the promotion of wound healing in the back of rabbits by bletila carrying exogenous rhEGF.
METHODS:Model rabbitswith ful-thickness skin defects in the back were treated with bletila carrying exogenous rhEGF (combined treatment group), bletila, rhEGF, or saline (control group).
RESULTS AND CONCLUSION:The time of wound healing was the shortest (P< 0.05) and the wound healing rate was the highest (P< 0.05) in the combined treatmentgroup. On postoperative days 3 and 10, newly formed granulation tissue, capilaries, and colagenous fibersshowed by hematoxylin-eosin staining staining and Masson staining and the strongest immunoreactivity of vascular endothelial growth factor determined by immunohistochemical staining were found in the combined treatment group (P< 0.05). These findings confirm that bletila carrying exogenous rhEGF promotes wound healing by accelerating the forming of granulation tissue, new-born capilaries, and colagenous fibers, and the effects are superior to either of them alone.

AIM: To investigate the efficacy of N-acetylcysteine (NAC) and taurine (Tau) in preventing hyperoxia-induced the lens opacification and the changes of biochemical parameters on organ cultured rabbit lenses.METHODS: Twenty-four lenses from adult rabbits were divided into the control group, the hyperoxia-exposed group, the hyperoxia-exposed group containing 20mmol/L of NAC, the hyperoxia-exposed group containing 80mmol/L of Tau, respectively. The treated groups incubated with hyperoxia ( pO2>80%) for 4 hours per day throughout a 7-day period. Lens transparency, histology and enzymatic activities measurements were determined after this incubation.RESULTS: Gross morphological examination of these lenses revealed some severe cortical opacification in the hyperoxia-exposed group, moderate cortical opacification in the control group and the Tau treated group. There was minimal cortical opacification in the NAC treated group. The glutathione (GSH) content and the activity of Na, K-ATPase were significantly decreased in the hyperoxia-exposed group than that of the control group, by 37.8% (P<0.05) and 53.5% (P<0.05), respectively. However, they were increased in the two treated groups, especially in the NAC treated group. There were no significant differences in the water-soluble protein content and the catalase and GSH reductase activities in all group lenses.CONCLUSION: Hyperoxia can induce the cortical opaci-fication in the lens. The role of NAC in the prevention of hyperoxia-induced cataract is superior to Tau.

Hospitals ; statistics & numerical data ; Humans ; Population Surveillance ; Quality Control ; Wounds and Injuries ; epidemiology

OBJECTIVE: To establish the method to analyze γ-hydroxybutyric acid (GHB) and its precursors 1,4-butanediol (1,4-BD) and gamma-butyrolactone (GBL) in urine through LC-MS/MS and provide evidence for related cases. METHODS: GHB-d6 and MOR-d3 were used as the internal standard. The urine sample was separated by LC after protein precipitation with methanol. The electrospray ion source was for ionization. Each compound was detected through multiple-reaction monitoring (MRM) mode. RESULTS: The limits of detection of GHB and its precursors 1,4-BD and GBL were 0.1, 0.1 and 2 μg/mL. The accuracy was 87.6%-98.1%. The intra-day and inter-day precisions were less than 15% and matrix effects were higher than 80%. CONCLUSION The method is high sensitive, simple, rapid, specific and with high reliability. This study has provided technical support and basic data for forensic cases involving GHB.
4-Butyrolactone/urine* ; Butylene Glycols/urine* ; Chromatography, Liquid ; Forensic Sciences ; Humans ; Hydroxybutyrates/urine* ; Mass Spectrometry ; Reproducibility of Results ; Tandem Mass Spectrometry

OBJECTIVETo explore the clinical effect of combination of acupressure and magnetic sticker on the quality of life (QOL) including appetite, defecation, and sleep in patients with advanced gastroenteric tumor.

METHODSTotally 147 patients with advanced gastroenteric tumor were assigned to 4 groups according to different treatment methods, i.e., the supportive treatment group (A, 20 cases), the acupressure treatment group (B, 41 cases), the magnetic sticker treatment group (C, 40 cases), and a combination of acupressure and magnetic sticker treatment group (D, 46 cases). They were respectively treated with different methods, supportive treatment for group A, acupressure for group B, magnetic sticker for group C, and a combination of acupressure and magnetic sticker for group D. The scores of food intake, defecation frequency, sleep time, Karnofsky, and QOL were compared before treatment and at day 14 after treatment.

RESULTSAfter treatment, the scores of food intake, defecation frequency, and sleep time were obviously improved in B, C and D groups (P < 0.01). There was statistical difference between group D and group A (P < 0.01). In addition, in comparison with A group, both Karnofsky score and QOL score increased in B, C and D groups (P < 0.01).

CONCLUSIONThe assisted therapy of the combination of acupressure and magnetic sticker could ameliorate QOL such as the digestive functions and sleep in patients with advanced gastroenteric tumor.

Acupressure ; methods ; Adult ; Aged ; Aged, 80 and over ; Female ; Gastrointestinal Neoplasms ; therapy ; Humans ; Magnetics ; Male ; Middle Aged ; Quality of Life ; Treatment Outcome

OBJECTIVETo probe into the relation between acute respiratory infection and enterovirus (EV), season, age and sex of children in Beijing area.

METHODSNasopharyngeal secretion samples from 402 inpatient children with acute respiratory infection (ARI) were obtained, and EV RNA was detected by reverse transcriptase polymerase chain reaction (RT-PCR). The distribution of month, age and sex among the children positive for EV were analyzed.

RESULTSSeventy of the 402 cases were positive for EV RNA, the positive rate was 17.4 percent. The EV positive rate was 17.7 percent in children with lower respiratory tract infection, and 15.9 percent in children with upper respiratory tract infection. The EV positive rates were 0-36.1 percent in different months, which was the highest in the May (36.1 percent) and lower in December (4.3 percent). The positive rate of EV was 14.8 percent-21.9 percent in different age groups except for children 12 years of age and older, the positive rate was the lowest in the 4-6 years age group, and the highest in the 7 month-1 year age group. The EV infected boys and girls accounted for 16.2 percent and 19.7 percent of total numbers of boys and girls, respectively.

CONCLUSIONThe EV positive rate was higher in children with lower respiratory infection, which suggests that EV may play an important role in ARI of children. The EV positive rate was higher from late spring to autumn. EV infection was common in children under 12 years of age. The rate of EV infection was not significantly different between boys and girls.

Acute Disease ; Adolescent ; Age Distribution ; Child ; Child, Preschool ; Enterovirus ; isolation & purification ; Female ; Humans ; Infant ; Male ; Nasopharynx ; virology ; Respiratory Tract Infections ; etiology ; Reverse Transcriptase Polymerase Chain Reaction ; Seasons

An increasing number of monopartite begomoviruses are being identified that a satellite molecule (DNAbeta) is required to induce typical symptoms in host plants. DNAbeta encodes a single gene (termed betaC1) encoded in the complementary-sense. We have produced transgenic Nicotiana benthamiana and N. tabacum plants expressing the betaC1 gene of a DNAbeta associated with Tomato yellow leaf curl China virus (TYLCCNV), under the control of the Cauliflower mosaic virus 35S promoter. Transgenic plants expressing betaC1 showed severe developmental abnormalities in both species. Microscopic analysis of sections of both transgenic and non-transgenic N. tabacum leaves showed abnormal outgrowths of transgenic N. tabacum to be due to disorganized cell division (hyperplasia) of spongy and palisade parenchyma. Immuno-gold labeling of sections with a polyclonal antibody against the betaC1 protein showed that the betaC1 protein accumulated in the nuclei of cells. The possible biological function of the betaC1 protein was discussed.
Cell Division ; physiology ; Cell Nucleus ; genetics ; metabolism ; ultrastructure ; Cells, Cultured ; DNA, Viral ; genetics ; Geminiviridae ; genetics ; Plant Diseases ; genetics ; virology ; Plant Leaves ; cytology ; genetics ; growth & development ; metabolism ; Plants, Genetically Modified ; growth & development ; metabolism ; Recombinant Proteins ; metabolism ; Tobacco ; cytology ; growth & development ; metabolism ; ultrastructure ; Viral Proteins ; genetics ; metabolism

Animals ; Bone Morphogenetic Protein 2 ; metabolism ; Bone Morphogenetic Protein 4 ; metabolism ; Carrier Proteins ; pharmacology ; Liver ; metabolism ; Liver Regeneration ; Male ; Rats ; Rats, Wistar

Objective: To study the regulatory mechanism of Nac-1 on the self-renewal of neural stem/progenitor cells (NSPCs). Methods: The expression level of Nac-1 was detected by using ESCs-derived NSPCs as the cell model. RNA interference was used to reduce the expression of Nac-1; the interference efficiency was detected by quantitative RT-PCR and Western blot. The proliferation and apoptosis of NSPCs were detected by cell counting and flow cytometry. Luciferase assay was used to detect the transcriptional regulation of Nac-1 on c-Myc. Results: Nac-1 was highly expressed in NSPCs, and its mRNA level decreased by 77% after differentiation. Compared with that in the control group, the mRNA level of Nac-1 in the NSPCs of the experimental group was significantly decreased, and the interference efficiency was 69% and 66%, respectively. NSPCs with Nac-1 knockdown showed slow proliferation, increased apoptosis and tended to differentiate, and the mRNA level of c-Myc decreased by 46% and 57% in two Nac-1 knockdown groups, respectively. Luciferase assay showed that the transcriptional activity of c-Myc promoter decreased by 24% and 36%, respectively, suggesting that Nac-1 could regulate the promoter activity of c-Myc gene. Conclusion: Nac-1 can promote the proliferation of NSPCs and inhibit their differentiation by regulating the transcription of c-Myc.