OBJECTIVE To study the possibility of acellular bony microtubule used to construct tissue engineering ossicular prosthesis. METHODS To prepare the acellular bony microtubule, observe the change of its histocompatibility and biomechanics. The acellular bony microtubule carried with collagen/ BMP-2 was implanted into the middle ear of the animals. The ectopic osteogenesis was observed. RESULTS The acellular bony microtubule has good histocompatibility. There wasn’t significant change about biomechanics. After carried with collagen/BMP-2, the bony microtubule can induce osteogenesis in the animal’s middle ear. CONCLUSION The acellular bony microtubule carried with collagen/BMP-2 has the possibility to be used to construct tissue engineering ossicular prosthesis.

Objective: This study was to observe the changes of IL-6 gene expression in acute repetitive hypoxia. Method: When the ratio of living cells was more than 95%, nerve cells cultured were passed through with mixed gases of 95% N_2+5%CO_2 for 3 min followed by another gases mixture of 95% O2+5% CO_2 for 10 min. After repeated the experiment as above, the alteration in the expression of IL-6 gene was measured using the RT-PCR method. The prod ucts of PCR were analyzed with computer Gel imaging and image analysis instrument. Result: After the first hypoxia IL-6 gene expression enhanced, and after the second hypoxia, it was still stronger than baseline although it declined slightly. There was no significant RNA disintegration. Conclusion:The IL-6 involves in the cellular defense in hypoxia adaptation.

There is a kind of intrinsic correlation between achievements and age.The average years of age of the scientists awarded the Nobel prizes in five fields are 30.9~33.3.Lots of ancient and modern scientists in many fields are similar to this.Therefore young people are able to make significant achievements,especially innovative achievements.This law is not well cogitated in our country,especially by the young themselves.To understand this law correctly will be of certain inspiration and significance not only for people from different age bracket to make achievement but also beneficial to improving the innovative capability of the whole country.

A retrospective study and cause analysis on the emergency rescue and medical service during the 2015 Tianjin harbor explosion accident,probed into the defects of the contingency plan of the hospital.Problems found include impracticability or deficiency of the plan,lack of safety awareness,and absence of preventive measures.A cause analysis was thus made to propose the following improvements on the contingency plan:1.Development of specific standard operation procedures(SOPs)for medical emergency response,including SOP for emergency response organization and command,that for the procedure and responsibility of massive injuries examination,and that for emergency rescue;2. Development of the plan for data statistics,that for volunteer management,that for media communications and that for donation management.

[Objective] To investigate the effect of Xiaocuo Prescription (XP), a herbal medicine compound with the actions of clearing away heat and toxins, activating blood and removing blood-stasis, on acne vulgaris. [Methods] Four hundred and forty six cases of acne vulgaris were randomized to two groups: group A (325 cases) treated with oral use of XP (mainly composed of Flos Lonicerae, Herba Hedyotis Diffusae, Herba Taraxaci, Flos Chrysanthemi, Radix Scutellariae, Cortex Mori, Radix Salviae Miltiorrhizae, etc.) and external application of Acne Vulgaris Liquid (composed of 3% metronidazole and 2% erythromycin), group B (121 cases) treated with oral use of isotretinoin and external application of Acne Vulgaris Liquid. Skin lesions on the face as well as the side effects were observed before and after treatment. [Results] Ridit analysis showed that curative effect in group A was better that in group B ( u = 2.204 6, P .05). No obvious side effects were found in group A but in 5 cases of group B side effects such as skin dryness, nausea and vertigo were found. [ Conclusion ] XP is effective in treating acne vulgaris . Further research is needed for its therapeutic mechanism.

Objective To screen and clone the target genes transactivated by hepatitis C virus (HCV) core protein. Methods The mRNA was isolated from HepG2 cells transfected with pcDNA3.1(-)-core and pcDNA3.1(-) empty vector, respectively, and suppression subtractive hybridization (SSH) method was employed to analyze the differentially expressed DNA sequences of the two groups. The obtained sequences were searched for homologous DNA sequence from GenBank. One of them was confirmed to be a new gene without homology with known genes in this database.Then, electric polymerase chain reaction was conducted for the cloning of the full-length DNA of the new gene, in conjunction with Kozak rule and the existence of polyadenyl signal sequence. The reverse transcription PCR (RT-PCR) was used to amplify the new gene with mRNA from HepG2 cell as the template. The coding sequence for the new gene was deduced according to the nucleotide sequence. Results A new gene with unknown function was named TAHCCP1.The nucleotide sequence of the new gene and its corresponding protein-encoding amino acid, which was 2 001nt and composing 667aa, have been determined. The sequence of the TAHCCP1 gene has been registered in GenBank with its accession number AY038359. Conclusion TAHCCP1 gene transactivated by HCV core protein was cloned and identified successfully by a combination of molecular biological technology and bioinformatics technique. The results are expected to pave the way for the study of the molecular mechanism of the transactivating effects of HCV core protein and the development of new therapies for chronic hepatitis C.

Based on the conception and character of core competency, this paper analyzed the core competency in rehabilitation organization and suggested some strategy.

Objective To investigate the effects of hairpin RNA on the expression of human papillomavirus E6 gene. Methods Plasmids expressing hairpin RNA, sense RNA and anti-sense RNA were constructed. The recombinants were transfected into cervical cancer cell line, CaSKi. Expression of E6 was detected with semi-quantitative RT-PCR and Western blot. Results Hairpin RNA could significantly reduce the expressions of E6 mRNA and protein, which was more efficient than traditional anti-sense RNA did. Conclusion The RNA interference through hairpin RNA can effectively inhibit the expression of target gene, and can be potentially useful in gene therapy of HPV related tumors.

AIM: To investigate the effects of Scutellaria barbata flavonoids (SBF) on neurofibrillary tangle (NFT) aggregation, tau protein phosphorylation and the regulated mechanism of glycogen synthase kinase (GSK) 3βand protein phosphatase (PP) 2A in the rats induced by amyloid βprotein 25-35 (Aβ25-35) in combination with AlCl3 and re-combinant human transforming growth factor ( RHTGF)-β1( composited Aβ) .METHODS:The male SD rats were used to establish the simulated Alzheimer disease ( AD) model by intracerebroventricular injection of composited Aβ.The Morris water maze was applied for screening the successful model rats with learning and memory deficits .The successful model rats were daily and orally administrated with SBF at doses of 35, 70 and 140 mg/kg or positive control drug Ginkgo biloba leaves flavonoids ( GLF) at 140 mg/kg for 37 d.The silver nitrate staining was used to determine the cortical NFT .The protein levels of total tau, phosphorylated protein of tau at Ser199 and Ser214 sites, GSK3βand PP2A in hippocampus and cortex were determined by Western blot .The mRNA expression of GSK3βand PP2A in the hippocampus and cortex was detected by RT-PCR.RESULTS:Compared with sham group , the cell number of positive NFT with silver nitrate staining in model rat cerebral cortex was significantly increased .The protein levels of phosphorylated tau protein at Ser 199 and Ser214 sites, GSK3βin the hippocampus and cerebral cortex in the model rats dramatically elevated , and PP2A was marked decreased as compared with the sham group rats.Meanwhile, the mRNA expression of GSK-3βsignificantly increased but PP2A was de-creased.However, these above abnormalities were differently attenuated by treating with SBF at different doses or GLF at 140 mg/kg for 37 d.CONCLUSION: SBF suppresses the NFT aggregation by inhibition of the regulatory functions of GSK-3βand PP2A, thus reducing the phosphorylation of tau protein .

Objective To evaluate the influence of precise liver resection techniques on intestinal permeability in the diseases needing liver resection.Methods Eighty-seven patients needing liver resection were randomized to receive the precise liver resection (n =58,PLR group) or the conventional liver resection (n =29,CLR group).D-lactate and and endotoxin in abdominal fluid were detected in all the patients.The abdominal fluid bacteria cultures were performed.Results The postoperative hospitalization time,the needed time of blood routine,temperature,and oppetite resuming were significantly shorter in PLR group than those in CLR group (t ≥7.36,P ＜ 0.01) ; The postoperative abdominal effusion was significantly less in PLR group than that of CLR group(t ≥ 14.17,P ＜0.01).The abdominal fluid concentrations of D-lactate and endotoxin in operation or at 1d after operation were significantly higher than those at 5d after operation in both groups(t ≥10.41,P ＜0.01).Those parameters decreased significantly at 2d after operation,returned to the normal level at 3d after operation in PLR group,and those parameters were significantly lower in PLR group than those in CLR group at the same time phase after postoperative 2 or 3 days (t ≥9.23,P ＜0.01) ; Those parameters began to drop at 3d after operation,returned to the normal level at 5d after operation in CLR group.The positive rate of abdominal fluid bacteria cultures was significantly lower in PLR group than that in CLR group(13/29) (x2 =23.51,P ＜ 0.01).Conclusions The precise liver resection techniques had an important influence on intestinal permeability in the diseases needing liver resection.