RESEARCH OF GENETIC POLYMORPHISM OF 5-HTT IN CHILDHOOD AUTISM

Objective To reveal the relationship between the 5-HTTLPR and the Chinese Han nationality children with CA, compared the distribution of the 5-HTTLPR between the Han Chinese children with CA and healthy Han Chinese children ,and analyzed the association between the 5-HTTLPR and clinical symptoms of the Han Chinese children with CA. Methods Genomic DNAs of fifty subjects including 25 autistic children and 25 controls were extracted from blood samples. PCR amplification using Oligonucleotide primers flanking 5-HTTLPR was performed. Results ① Three kinds of alleles including the S (short) allele, the L (long) allele and the VL allele were found , and the 5-HTTLPR genotypes shown were S/S, L/L, S/L and L/VL. ② Allele frequencies did not differ significantly in patient groups in comparison with the control sample. No significant difference was identified between the observed 5-HTTLPR genotype distribution of the patient groups and control group. ③ The distribution of homozygous and heterozygous subjects between the two groups differed significantly. ④ The genotypes of the 5-HTTLPR polymorphism correlated significantly with the Body Movement Factor. ⑤ The allele frequency of healthy Han Chinese population and that of healthy Japanese population were similar. The frequency of S allele in not only autistic subjects but also healthy children in this study was considerably more than that in Caucasians and the frequency of L allele in our subjects decreased correspondingly. Conclusion ① A significant difference in the allele frequency between the Han Chinese and Caucasian populations was found. ② The genotypes of the 5-HTTLPR polymorphism correlated significantly with the Body Movement Factor of the patients. ③ The homozygote and the L allele were positively relevant to CA and they might be the risk factors of CA. The heterozygote and the S allele were negatively relevant to CA and they might be the protective factors of CA.

Experiences of repairing large defect on adominal wall with artificial mesh and myocutaneous flap

Objective： To evaluate the results of repairing large defect on abdominal wall with artificial meshes（expansible polytetrafluoroethylene, e-PTFE and Composix Mesh）. Methods： Four cases with large defect of abdominal wall caused by abdominal wall tumors or injuries were repaired with artificial meshes and myocutaneous flaps. Results： The cases were followed up 7 months to 2.5 years with no complications such as incisional hernia, bowel adhesion and exposure of the prosthetic materials. Conclusion： The combined use of artificial meshes contained e-PTFE and myocutaneous flaps is a reliable and effective method for repairing large defect on abdominal wall.

Experimental Study of Yishou Tiaozhi Tablet(益寿调脂片) on Free Radical Metabolism in Aging Model Mice

Objective： To observe the effect of Yishou Tiaozhi tablet（YSTZT） on the metabolism of free radical in mice of aging model. Methods: Using the aging model induced by hypodermic injection of 5%D-glalactose in mice for forty days. The content of malondialdehyde(MDA) and activity of superoxide dismutase(SOD), glutathione peroxidase (GSH-Px) in serum, activity of monoamine oxidase B (MAO-B), Na+-K+-ATPase in brain were investigated after treatment. Results: Compared with the aging model group, it showed that YSTZT could obviously inhibit the increase of level of MDA in serum and the activities of MAO-B in brain; and enhance the activities of SOD,GSH-Px in serum, and the activities of Na+-K+-ATPase in brain. Furthermore, YSTZT could obviously elevate the tolerance to fatigue and hypoxia in mice. Conclusion: YSTZT could effectively improve the free radical metabolism of senile body, it is an ideal and effective medicine in preventing aging, which is also one of the experimental basis in proving the theory of 'Spleen and Kidney Deficiency complicated with Stasis and Phlegm causes aging'.