Objective To establish a rapid monitoring method of the three common bacteria in mice frozen resources, such as embryo, sperm, etc. Methods To extract DNA of the three positive bacteria( Staphylococcus auerus, Klebsiella?pneumoniae and β?hemolyticstreptococcus) , and establish PCR monitoring method of the three positive strains through designing primer and refining PCR condition. Then extract total DNA of the frozen resources, detect the DNA according to the PCR condition of the three positive bacteria, some samples were detect by fluorescence quantitative PCR at the same time. Results ①successfully establish a PCR detection method of the three positive bacteria, the minimum detectable concentration of Staphylococcus auerus, Klebsiella pneumoniae and β?hemolytic streptococcus is 4?19 × 10 -5 ng/μL, 1?98 × 10 -5 ng/μL and 1?07 × 10 -3 ng/μL. ②Proved that the three bacteria doesn ’ t exist in the sample by normal PCR and fluorescence quantitative PCR methods. Conclusions Establising a rapid monitoring method of common pathogens of frozen embryo and sperm in mice.

Objective To investigate the changes of average body weight gain and serum biochemical indexes of C57BL/6J mice (B6 mouse) and their offspings after frozen-thawed embryo transfer of B6 mice.Methods The mice were divided into three groups in this study.In the experimental group I (E-I,30 males and 20 females),2-cell embryos after in-vitro fertilization were collected,and cryopreserved by EFS method,then obtained the offsprings after transplantation of the recovered embryos to oviduct of recipient mice (ICR mouse).In the experimental group II (E-II,26 males and 17 females),when the mice from E-I grew to maturity,the offsprings were obtained from natural mating of mice from E-I.In the control group (20 males and 20 females),the offsprings came from conventional feeding and natural mating.The three groups of mice were raised to 16 weeks old,weighing the body weight at a regular time intervals,and the serum biochemical indexes were obtained from 16-week-old mice.Then the changes of average body weight and serum biochemical indexes of the mice were analyzed.Results The average body weight of E-I mice was significantly higher than that of control group at each week-age (P<0.01).The average body weight of E-II female mice was significantly higher than that of the control group in 12-16-week old mice (P<0.01),but the average body weight of E-II male mice showed no significant differences compared with the control group except for few weeks.The serum biochemical indexes of E-I and E-II mice were changed in all items except for AST,TP and Ca.Conclusions There are some effects on the average body weight gain and serum biochemical indexes of C57BL/6J mice and their offspings after frozen-thawed embryo transfer.

Objective To study the application effect of antiskid steel plate internal fixation via exposing lateral and posterior ankle fracture through fibula posterolateral approach in the treatment of Lauge-Hansen supination-eversion ankle fracture.Methods From January 2009 to December 2012,exposed the lateral and posterior ankle fracture through fibula posterolateral approach of 36 patients suffering from the Lauge-Hansen supination-eversion ankle fracture,and fixed the lateral and posterior ankle by the antiskid steel plate.Adopt Olerud-Molander ankle function scoring system to evaluate the postoperative effect of the ankle.Results All the patients were followed up for 7-27 months,with an average follow-up of 19 months.There was no complications such as incision infection and cutaneous necrosis.Only 1 patient occurred with peroneus myotenositis,and the symptom was relieved after taking out the steel plate.The fracture was healed within 16 weeks.Among the 36 cases,22 cases were excellent,9 cases were good,4 cases were medium and 1 case was poor.The fine rate was 86.1％(31/36).Conclusion Using the antiskid steel plate to treat the lateral and posterior ankle fracture through fibula posterolateral approach,can fully expose a single incision,fix the lateral and posterior ankle and reduce the tension in suture,improve the incision healing rate and fracture stability,provide a new method for treating ankle fracture.

OBJECTIVE: To evaluate the efficacy and safety of Danning Tablet (DNT) in patients with non-alcoholic fatty liver disease (NAFLD) of damp-heat syndrome type. METHODS: A multicenter, randomized, double-blinded and positive drug parallel controlled trial was performed. One hundred and thirty-five patients were enrolled into the study and divided into two groups: DNT-treated group (n=102) and ursodeoxycholic acid (UDCA)-treated group (n=33). Body mass index (BMI), principal symptoms, liver function, blood lipids, iconographic, and compositional parameters were measured before and after treatment, respectively. RESULTS: In the two groups, BMI, distress in hepatic region, fatigue, anorexia, liver function, blood lipids and iconographic parameters were significantly improved, and the improvements of BMI, distress in hepatic region were better in DNT-treated group than in UDCA-treated group. The histological study also showed that DNT had positive effect in treatment of NAFLD. CONCLUSION: DNT is an effective drug to treat patients with NAFLD of damp-heat syndrome type and is more effective than UDCA.

Objective:To study the correlation between the acute-phase characteristics of motor evoked potential (MEP) and severities of spinal cord injury in patients with acute cervical hyperextension injury and central cord syndrome (CCS).Methods:Retrospectively analyzed were the data of 45 patients with acute cervical hyperextension injury and CCS (observation group) who had been admitted to Department of Orthopedics, Tongji Hospital Affiliated to Tongji University from December 2018 to July 2021 and 20 healthy controls. Examination of transcranial magnetic stimulation-induced MEP was performed in patients with CCS and healthy controls using a magpro x100 magnetic stimulator, and recording was conducted in bilateral abductor pollicis brevis (APB). The characteristics of MEP waveform latency, amplitude and motor threshold were described and compared between the healthy control and observation groups; the correlations were analyzed between the MEP latency and the severity of spinal cord injury [American Spinal Injury Association (ASIA) total score and motor function of Upper Extremity Motor Subscores (UEMS)] in the observation group. According to different MEP-induced states, the patients in the observation group were divided into a resting group ( n=19), a facilitation group ( n=18), and a no-waveform group ( n=8). The severity of spinal cord injury (ASIA total score) and the functional independence of the spinal cord (SCIM-Ⅲ score) were compared among the 3 groups to analyze the correlation between the MEP-induced state and the severity of spinal cord injury (ASIA total score). Results:The observation group had a significantly longer MEP latency [(30.16±6.32) ms], a significantly smaller amplitude [(0.54±0.30) mV] and a significantly higher motor threshold [(65%±11%)] than the healthy control group (all P<0.05). The MEP latency in the observation group was significantly correlated with ASIA total score ( r=-0.730, P<0.001) and UEMS ( r=-0.740, P<0.001). The ASIA total score and SCIM-Ⅲ score were significantly different among the 3 groups ( P<0.05), and the MEP-induced state was significantly correlated with the severity of spinal cord injury (ASIA total score) ( r=0.668, P<0.001). Conclusions:In patients with acute cervical hyperextension injury and CCS, the MEP latency is prolonged, the amplitude lowered, and the motor threshold enhanced. The MEP latency is strongly correlated with the severity of spinal cord injury and upper limb motor function. The MEP-induced state is also closely related to the severity of spinal cord injury.