Mechanism of cleft palate in C57BL/6N mice induced by 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin / 中华口腔医学杂志

Objective: To explore the molecular mechanism of cleft palate in mice induced by 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin (TCDD). Methods: The pregnant mice were randomly divided into TCDD-treated group (n=42) and control group (n=42). TCDD-treated group was given by gavage a single dose of TCDD (64 μg/kg) at 8: 00 AM on gestation day 10 (GD10) and the control group was given by gavage the isopyknic corn oil. At GD13-GD15, the fetal mice palate development was observed by HE staining. The mouse embryonic palatal mesenchymal cell proliferation was detected by 5-bromo-2-deoxyuridine (BrdU) immunofluorescence. The localization and expression of maternally expressed gene3 (MEG3) in mouse embryonic palatal mesenchymal cells was detected by situ hybridization and real-time PCR (RT-PCR). The key protein expressions of transforming growth factor-β (TGF-β)/Smad signaling pathway in mouse embryonic palatal mesenchyme were analyzed by Western blotting. The interaction of MEG3 and TGF-β receptor Ⅰ (TGF-βRⅠ) was examined by RNA binding protein immunoprecipitation (RIP). Results: At GD13 and GD14, compared with the control group, the ratio of BrdU-positive cells in the palatal mesenchyme of TCDD-treated fetuses decreased significantly (GD13, t=6.66, P=0.003; GD14, t=6.56, P=0.003). However, at GD15, the ratio of BrdU-positive cells was significantly increased (t=-5.98, P=0.004). MEG3 was mainly expressed in the nuclei of fetal mouse palatal mesenchymal cells, and the expression of MEG3 in TCDD group was significantly increased at GD13, GD14 and GD15(GD13, t=39.28, P=0.012; GD14, t=18.75, P=0.042; GD15, t=28.36, P=0.045). At GD14, TCDD decreased the levels of p-Smad2 and Smad4 in embryonic palate mesenchymal cells (p-Smad2, t=9.48, P=0.001;Smad4, t=63.10, P=0.001), whereas the expression of Smad7 was significantly increased at GD14 (t=30.77, P<0.001). The results of the RIP experiment showed that the amount of TGF-βRⅠ-bound MEG3 in mouse embryonic palatal mesenchymal cells in the TCDD group (23.940±1.301) was higher than that in the control group (8.537±1.523)(t=24.55, P<0.001). Conclusions: MEG3 is involved in the suppression of mouse embryonic palatal mesenchymal cell proliferation, functioning at least in part via interacting with the TGF-βRⅠ protein and thereby suppressing Smad signaling in the context of TCDD induced cleft palate.

Preparation and antimicrobial effect of aromatic, natural and bacteriostatic foot wash with skin care / 中国中药杂志

To prepare the aromatic, natural and bacteriostatic foot wash with skin care and research the inhibition effect on the different bacteria and pathogenic fungus which cause dermatophytosis. It was prepared by using Sophoraflavescens and Dictamnus dasycarpus as materials with the addition of Aloe extract, essential oil, surfactant, etc. The antifungal and antibacterial activity was researched by the levitation liquid quantitative method. The foot wash smelled faintly scent. The use of this product can produce a rich foam. The inhibitory rate were all more than 90%. The preparation process of the foot wash was simple. It has obviously bacteriostatic and fungistatic effect.

Impacts on the appetite regulating factors of infantile anorexia treated with acupuncture at Sifeng (EX-UE 10) / 中国针灸

<p><b>OBJECTIVE</b>To explore the dynamic change and clinical efficacy of acupuncture at Sifeng (EX-UE 10) on appetite regulating factors in the serum of infantile anorexia.</p><p><b>METHODS</b>Eighty cases, in compliance with the diagnostic criteria, aged from 3 to 6 years were randomized into an acupuncture group and a medication group, 40 cases in each one. Additionally, a healthy control group (30 cases) was set up. In the acupuncture group, the pricking method was adopted at Sifeng (EX-UE 10) with the three-edged needle. A few light yellow, transparent viscous liquid or blood was squeezed out after pricking. The treatment was given once a week, for 4 weeks totally. In the medication group, erkangning syrup was administered, 3 times a day, for 4 weeks totally. The ghrelin, leptin and neuropeptide Y (NPY), and the clinical efficacy were observed before and after treatment in each group.</p><p><b>RESULTS</b>The levels of ghrelin and NPY before treatment in acupuncture group and the medication group were lower apparently than those in the healthy control group (all P < 0.01), but the level of leptin was higher appa-rently than that in the healthy control group (P < 0.01). After treatment, the levels of ghrelin and NPY were higher apparently than those before treatment in the acupuncture group (both P < 0.01), and the level of leptin was lower apparently than that before treatment (P < 0.01). All of the above indices in the acupuncture group were improved obviously after treatment as compared with those in the medication group (all P < 0.01). The remarkable and effective rate were 82.5% (33/40) and 32.5% (13/40) and the total effective rate were 95.0% (38/40) and 45.0% (18/40) in the acupuncture group and medication group separately, the results in the acupuncture group were superior to the medication group (both P < 0.01).</p><p><b>CONCLUSION</b>Acupuncture at Sifeng (EX-UE 10) effectively promotes the secretion of ghrelin and NPY and inhibit leptin. It effectively promotes appetite for the children and the efficacy is superior to erkangning syrup.</p>