Objective To the function that the rectum cancer of a pelvic autonomic nerve preservation to the male sufferer. Methods 23 cases of the rectum cancer patients in Dukes A,B,C underwent the operation of reserving a pelvic autonomic nerve perservation(2 among them for reserve the single side plant nerve). Results 7 cases happened d vsuresia in 21 cases of perserving double autoonomic nerve, whose occurrence rate was 30. 4 % (7 /23), and 6 cases happened sexual disturbance (26.1% ,6/23). It had signicant difference compared with the traditional operation(X2 = 10.3604,P = 0.001

Objective To investigate and to compare the clinical curative efficacies of local anaesthesia and epidural block anaesthesia in tension-free hemioplasties. Methods 89 patients hospitalized were randomly divided in-to two groups, with each of them respectively adopting the two types of anaesthesia methods (local anaesthesia and epidural anaesthesia) to cure inguinal hernia,operation methods is tension-free hernioplasties. Results The results show that in terms of duration of operation, early-phase activities after operation, time of hospitalization, post-opera-tion pains,early-phase complication after operation and treatment expenses etc, local anaesthesia is undoubtedly supe-rior to epidural block anaesthesia. Conclusion Tensioa-free hernioplasties under local anaesthesia is worth clinical promotion to benefit all the patients.

Objective To construct the KU80 inhibition cell model by RNAi in U2OS cell and to explore the relationship between the Ku80,telomeres and radiosensitivity in telomerase-negative tumor cells.Methods U2OS cells were transfected with the recombinant plasmids of pshRNA-K80 by the lipofectamine,and the stable transfected cell clones were selected by G418.After the selection,the cells were collected and analyzed by the flow cytometry.RT-PCR and Western blot were used to measure the expression of Ku80 and Real-time PCR was used to detect the length of telomeres.The radiosensitivity of U2OS was determined by clone formation array.Results The transfection efficiency of the positive cell clones detected by the flow cytometry was (83.23 ± 7.63) ％.The inhibition rate of the Ku80 gene transcription in the cell group with recombinant plasmid was(68.09 ± 1.16)％ and the inhibition rate of the Ku80 protein expression in the same group was (11.03 ± 2.45) ％.The results of Real-time PCR showed that the telomere length of the cell group with recombinant plasmid (1.07 ± 0.07) was significantly shorter than that of the control group (4.42 ± 1.30,F =38.58,P ＜ 0.05) and that of the empty plasmid group (4.11 ±0.84,F =38.58,P ＜ 0.05).Compared to the control group,the telomere length of the empty plasmid group did not changed(4.42 ±0.84 vs.4.11 ±0.84).U2OS cells with Ku80 expression suppressed had lower SF2 than that of the control cells (F =1089.61,P ＜0.05),and resulted in the SER of 1.47.Conclusions The Ku80 inhibition cell model in telomerase-negative U2OS cell line is successfully established which has the shorter telomere length,and is more sensitive to radiation.Telomere shortening caused by pshRNA-of Ku80 is likely to be one of the mechanisms of radiosensitization in this kind of cell model.